JP2008230573A - Cargo handling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent releasing of lashing a swing arm and a dump arm during dumping of a container. <P>SOLUTION: The lashing lock mechanism r comprises a lock lever r1 rotatably supported to the dump arm a1, and engaging with the lashing hook f by rotating in one direction so as to lock the lashing hook in a lashing state; and a spring 4r energizing the lock lever in one direction. When the dump arm falls down on a chassis 1, an operation pin r2 of the lock lever abuts on a member r6 fixed on the chassis, and the lock lever rotates in an opposite direction to one direction, thereby releasing the locking. If the dump arm a1 raised from the chassis 1 at a predetermined angle and the operation pin separates from the member r6, the spring r4 rotates the lock lever in one direction to be engaged with the lashing hook, and the lashing hook is locked in the lashing state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention has an arm mechanism in which a dump arm, a swing arm, and a tilt arm are connected from the proximal end to the distal end. The container is loaded and unloaded by rotating the tilt arm and the swing arm, and the entire arm is integrated. The present invention relates to a cargo handling vehicle that dumps containers by rotating them.

  As described in Patent Document 1, an arm mechanism in which a dump arm, a swing arm (“Lift Arm 4” in the same document), and a tilt arm (“Hook Arm 5” in the same document) are connected from the base end. A cargo handling vehicle is known in which containers are loaded and unloaded by a pivoting operation of a tilt arm and a swing arm, and a container is dumped by a pivoting operation of the entire arm.

  In the cargo handling vehicle described in Patent Document 1, a lashing mechanism (L) is provided in which a dump arm and a swing arm are lashed together in a straight line, and the lashing can be released. This lashing mechanism includes a lashing hook that is pivotally supported on one side of the rear part of the swing arm, and a hook that is provided on one side of the front end of the dump arm so that the tying hook can be detachably engaged. It is comprised from the stop pin and the rod which pin-connects the intermediate part of a lashing hook, and the base end of a tilt arm, respectively.

  When the tilt arm is in a retracted position that is substantially perpendicular to the swing arm and farthest from the dump arm, the rod is pushed rearward, and the lashing hook is rotated in the lashing direction and locked to the locking pin. As a result, the swing arm and the dump arm are fixed together in a straight line. In this state, by extending the cylinder connected to the swing arm, the dump arm and the swing arm are integrally rotated around the rotation fulcrum of the dump arm, and the container can be dumped.

On the other hand, when the tilt arm swings back to the use position tilted at a predetermined angle near the dump arm, the rod is pulled forward, and the lashing hook is rotated in the lashing release direction and is released from the locking pin. Thus, the swing arm and the dump arm are released from being locked, and these arms are allowed to rotate separately. In this state, by extending the cylinder connected to the swing arm, the swing arm rotates about the rotation fulcrum supported by the dump arm, so that the container can be loaded and unloaded.
JP 2000-062517 A, paragraph 0014, FIG. 6, FIG.

However, the above-described conventional technology has the following problems.
During the dumping operation, the tilt arm needs to be maintained at the storage position rotated forward. The angle of the tilt arm with respect to the swing arm is maintained by a hydraulic cylinder. At the time of dumping, a force is exerted to rotate the tilt arm backward due to the weight of the container and the load in the container.
When the tilt arm device has some trouble, such as oil leakage or failure of the hydraulic cylinder for the tilt arm, or when the tilt arm maintenance force is reduced, the tilt arm rotates backwards under the weight of the container. There is a risk of it.
If the tilt arm rotates backward during dumping, the swing arm and dump arm are unfastened as described above, and the swing arm rotates relative to the dump arm, causing the container to suddenly It is very dangerous.

  The present invention has been made in view of the above problems in the prior art, and provides a highly safe cargo handling vehicle that prevents the release of a lashing hook that ties a swing arm and a dump arm during dumping of a container. The task is to do.

The invention according to claim 1 for solving the above-mentioned problem is a dump arm whose base end is supported rotatably at the rear part of the chassis,
A swing arm rotatably connected to the dump arm;
A dump cylinder having one end connected to the swing arm and the other end fixed on the chassis;
A lashing hook for lashing the dump arm and the swing arm;
A lashing hook operating mechanism for operating switching between a lashing state in which the dump arm and the swing arm are lashed by the lashing hook, and a lashing release state in which the lashing is released;
The swing arm is rotated with respect to the dump arm that has fallen on the chassis by the dump cylinder in the unlocked state, and a loading / unloading operation of the container connected to the tip side of the swing arm is performed,
With the dump cylinder in the locked state, the swing arm and the dump arm are integrated and rotated from the chassis around the pivot fulcrum of the dump arm and connected to the tip side of the swing arm. In a cargo handling vehicle that dumps containers
It is a cargo handling vehicle having a lashing lock mechanism that locks in the lashed state when the dump arm rises above a predetermined angle from the chassis.

The invention according to claim 2 is a dump arm whose base end is rotatably supported at the rear part of the chassis,
A swing arm rotatably connected to the dump arm, and a tilt arm rotatably connected to the swing arm;
A dump cylinder having one end connected to the swing arm and the other end fixed on the chassis;
A tilt cylinder that drives the pivoting movement of the tilt arm relative to the swing arm;
A lashing hook for lashing the dump arm and the swing arm;
In conjunction with the pivoting operation of the tilt arm, the locking operation is performed to switch between a locked state where the dump arm and the swing arm are locked by the locking hook and a locked state where the dump arm is released. A binding hook operating mechanism,
The swing arm is rotated with respect to the dump arm that has fallen on the chassis by the dump cylinder in the unclamped state, and the loading / unloading operation of the container connected to the tip of the tilt arm is performed,
The swing arm and the dump arm are integrated with the dump cylinder in the locked state and are pivoted around the pivot fulcrum of the dump arm from the chassis and connected to the tip of the tilt arm. In cargo handling vehicles that perform container dumping operations,
It is a cargo handling vehicle having a lashing lock mechanism that locks in the lashed state when the dump arm rises above a predetermined angle from the chassis.

  According to a third aspect of the present invention, the lashing lock mechanism is supported at the tip of the dump arm, and unlocks when it interferes with a member fixed on the chassis, and locks when separated from the member. The cargo handling vehicle according to claim 1 or claim 2, wherein

The invention according to claim 4, wherein the lashing hook is rotatably supported by the swing arm, and lashes the dump arm and the swing arm by being locked to the dump arm.
The lash locking mechanism is
A lock lever that is rotatably supported by the dump arm, and engages with the lashing hook by rotating in one direction to lock the lashing hook in the lashed state;
A spring for biasing the lock lever in the one direction,
When the dump arm falls on the chassis, the lock lever rotates in a direction opposite to the one direction until the lock lever interferes with a member fixed on the chassis and the lock is released. The cargo handling vehicle according to claim 1 or claim 2.

The invention according to claim 5 is characterized in that the securing hook operating mechanism is
A connecting portion formed at the lower end of the tilt arm;
A connecting rod having one end hinged to the connecting portion and the other end hinged to the lashing hook;
5. The cargo handling vehicle according to claim 4, wherein the connecting rod extends against a holding force of the securing hook by the lock lever.

According to the present invention, the lashing lock mechanism locks the lashing hook for tying the swing arm and the dump arm during the dumping of the container, so there is a possibility that the lashing between the swing arm and the dump arm is released. A highly safe cargo handling vehicle can be obtained.
Since this lashing lock mechanism operates when the dump arm rises from the chassis more than a predetermined angle, there is no artificial forgetting, and the lock is released when the dump arm falls on the chassis It is possible to smoothly carry out the loading / unloading operation, and it is excellent in safety and smoothness of operation.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

  FIG. 1 is a left side view of a loading platform of a cargo handling vehicle according to an embodiment of the present invention. FIG. 2 is a top view of the container loading / unloading apparatus. FIG. 3 is a detailed view of the lashing mechanism and the lashing lock mechanism, wherein (a) is a top view and (b) is a left side view. FIG. 4 is a left side view of the connecting rod.

As shown in FIG. 1, the cargo handling vehicle according to the present embodiment has a container loading / unloading device that loads and dumps containers on a chassis 1.
The container loading / unloading device is mainly composed of a three-joint arm in which a dump arm a1, a swing arm a2, and a tilt arm a3 are connected to a subframe 2 fixed to the chassis 1. Each joint is uniaxial indirect rotating around an axis parallel to the vehicle width.

A pivot fulcrum p1 of the dump arm a1 is a connection point with the subframe 2 and is disposed at the rear of the vehicle.
The swing fulcrum p2 of the swing arm a2 is a connection point with the dump arm a1, and is disposed slightly behind the tip of the dump arm a1, and in a straight line state, the tip of the dump arm a1 and the rear of the swing arm a2 Both are connected so that an edge part may overlap.
The tilt arm a3 includes a container hook a4 at the tip, and a rear end portion that is formed in an L shape and extends rearward is rotatably connected to the swing arm a2 at a rotation fulcrum p3.

  When the container 3 is mounted, as shown in FIG. 1, the dump arm a1 and the swing arm a2 are straightly extended forward of the vehicle, lie on the chassis 1, and the front end portion of the tilt arm a3 is erected substantially vertically. The

  One end of the dump cylinder c1 is connected to a portion of the swing arm a2 on the tip side from the rotation fulcrum p2. The other end of the dump cylinder c1 is connected to the front end of the subframe 2 and its position is fixed with respect to the chassis 1.

  One end of the tilt cylinder c2 is connected to the tilt arm a3, and the other end is connected to the front end portion of the swing arm a2, and drives the rotation of the tilt arm a3.

  A securing hook f is rotatably supported at a portion of the swing arm a2 that is close to the tip of the dump arm a1.

At the rear end of the tilt arm a3, a tilt arm lever a5 extending from the rotation fulcrum p3 in the rotation radial direction is fixed. The front end of the connecting rod b is hinged to the tilt arm lever a5. The rear end of the connecting rod b is connected to a lashing hook f, thereby forming a lashing hook operating mechanism.
A securing lock mechanism r is attached to the tip of the dump arm a1. Details of the securing lock mechanism r are shown in FIG.

As shown in FIG. 3B, the rotation fulcrum p4 of the securing hook f is disposed on the swing arm a2. In FIG. 3A, the swing arm a2 and the dump cylinder c1 are not shown.
The tip end portion a6 of the dump arm a1 is configured in the form of two parallel plates, and the hook locking shaft f1 is supported at both ends at the tip end portion. The lashing hook f is locked to the hook locking shaft f1 to lock the dump arm a1 and the swing arm a2 in a straight line.

When the tilt arm a3 is rotated so as to move the container hook a4 forward (in FIG. 5 (a), the tilt arm a3 (B) → tilt arm a3 (A)), the connecting rod b is moved to the tilt arm lever a5. When the lashing hook f is pushed by the connecting rod b and swings backward, the lashing hook f is locked to the hook locking shaft f1, and FIG. 3 (b) and FIG. 6 (b). It is tied up as shown in
Conversely, when the tilt arm a3 is rotated so as to move the container hook a4 backward (in FIG. 5 (a), the tilt arm a3 (A) → tilt arm a3 (B)), the connecting rod b is tilt arm. By being pulled by the lever a5 and the securing hook f being pulled by the connecting rod b and swinging forward, the securing hook f is separated from the hook locking shaft f1, and as shown in FIG. The bond is released.

Then, as shown in FIG. 5, the cargo handling vehicle moves the swing arm a2 around the rotation fulcrum p2 with respect to the dump arm a1 that has fallen on the chassis 1 by expanding and contracting the dump cylinder c1 in the unlocked state. The container 3 is loaded and unloaded by rotating the container 3 connected to the tip of the tilt arm a3.
In addition, as shown in FIG. 6, the cargo handling vehicle extends from the chassis 1 around the rotation fulcrum p1 of the dump arm a1 by integrally extending the swing arm a2 and the dump arm a1 by extending and contracting the dump cylinder c1 in a locked state. The container 3 connected to the tip of the tilt arm a3 is raised and rotated to perform a dumping operation.

  As shown in FIG. 3, the lashing lock mechanism r includes a lock lever r1 having an operation pin r2 and a lock pin r3, a return spring r4, a stopper r5, a contact member r6, and a spring stay r7. .

The lock lever r1 is supported by the tip end a6 of the dump arm a1 so as to be rotatable around the rotation fulcrum p5. As shown in FIG. 3A, the plate portion r8 of the lock lever r1 is disposed inside the subframe 2 outside the tip end portion a6 of the dump arm a1. An operation pin r2 protrudes outward and a lock pin r3 protrudes inward at the rotation end of the lock lever r1. Further, a return spring r4 is installed between the lock lever r1 and the spring stay r7, and the lock lever r1 is urged counterclockwise in FIG. 3B by the return spring r4. The spring stay r7 is fixed to the tip end a6 of the dump arm a1. The stopper r5 is fixed to the outer surface of the tip end portion a6 of the dump arm a1 at a position coaxial with the hook locking shaft f1. The abutting member r6 is fixed to the subframe 2. The contact member r6 is disposed at a position where it comes into contact with the operation pin r2 when the dump arm a1 falls.
In FIG. 3B, r1 (A), r2 (A), and r3 (A) indicate the locked state, and r1 (B), r2 (B), and r3 (B) indicate the unlocked state.

  When the dump arm a1 rises from the chassis 1 by a predetermined angle or more, the contact member r6 moves downward relative to the operation pin r2, and the lock lever r1 (B) in the unlocked state is returned to the return spring r4. By the action of FIG. 3B, it is rotated counterclockwise in FIG. 3B, and the tying hook f in the tying state is locked in the tying state. That is, at the time of locking, the lock pin r3 (A) engages with the engagement end f2 of the lashing hook f, and the plate portion r8 contacts the stopper r5 to prevent the lashing hook f from rotating.

  When the dump arm a1 falls on the chassis 1, the operation pin r2 contacts the contact member r6 and is pushed up, and the lock lever r1 (A) in the locked state rotates clockwise in FIG. 3 (b). The lock is released. That is, when the lock is released, the lock pin r3 (B) is detached from the rotation range of the engagement end f2 of the lashing hook f and does not restrict the rotation of the lashing hook f.

As described above, the lashing lock mechanism r is supported by the tip end portion a6 of the dump arm a1, and when it interferes with the contact member r6 fixed on the chassis 1, the lock is released and separated from the contact member r6. Then it locks.
Therefore, when the dump arm a1 rises by a predetermined angle or more by the rotation operation and the tip end portion a6 rises, the tying hook f that ties the dump arm a1 and the swing arm a2 is locked.
In the range of the predetermined angle or more, even if the tilt arm a3 rotates backward during the dumping operation and at rest, and the operation of releasing the lashing of the lashing hook f is activated, the lashing lock mechanism r fixes the tying lock mechanism r. The binding between the dump arm a1 and the swing arm a2 is maintained without being released and is safe.
The predetermined angle is set so that the lock is activated even when the tip end a6 is slightly lifted by selecting the fixing position of the operation pin r2 and the lock pin r3 with respect to the rotation fulcrum p5 and the formation position and size of the engagement end f2. Can be designed to improve safety.

  In order to prevent an excessive load from being applied to the lashing hook f, the lashing hook operating mechanism, and the lashing lock mechanism r even if the tilt arm a3 rotates backward when the lashing hook f is locked, The lock lever r1 expands by losing the holding force of the lashing hook f. Details are shown in FIG. As shown in FIG. 4, the connecting rod b has a hole b2 for connecting to the tilt arm lever a5 at one end and a hole b3 for connecting to the lashing hook f at the other end. The cylinder b6 is fixed to the rod b4 on the hole b2 side, and the cylinder b6 and the rod b5 on the hole b3 side are connected through a spring b1 provided in the cylinder b6. When a tensile load is applied between the holes b2 and b3, the spring b1 is compressed and deformed, the rod b5 extends from the cylinder b6, and the distance between the holes b2 and b3 increases, that is, the connecting rod b expands. .

The connecting rod b has a minimum length when there is no load, and the minimum length between the holes b2 and b3 is fixed to the connecting point of the tilt arm lever a5 when the tilt arm a3 (A) rotates forward. It is equal to the length between the connection points of the lashing hooks f in the bound state.
Each part including the characteristics of the spring b1 is designed so that the lock hook f can be rotated from the locked state to the locked state by the stroke of the tilt arm lever a5 when the lock of the lock hook f is released. ing.
In addition, when the securing hook f is locked, each part including the characteristics of the spring b1 is designed so that the hole b2 can follow the stroke of the tilt arm lever a5 by the extension of the connecting rod b due to the deformation of the spring b1. Yes.
Therefore, even when the lock hook r is locked by the lock lever r1, that is, during dumping, even if the tilt arm a3 is pulled by the container 3 due to a failure or the like and fully rotated rearward, the load is eliminated by the deformation of the spring b1. However, an excessive load is not applied to the lashing hook f, the lashing hook operating mechanism, and the lashing lock mechanism r, and there is no risk of damaging them or releasing the lashing due to the damage.

  In the above embodiment, the tip of the arm is a tilt arm, but even a telescopic or other type of arm can be used to lock the dump arm and swing arm, or to release the lock. If present, it is effective to apply the lashing lock mechanism of the present invention.

It is a left view of the loading platform of the cargo handling vehicle which concerns on one Embodiment of this invention. It is a top view of the container loading / unloading apparatus which concerns on one Embodiment of this invention. FIG. 2 is a detailed view of a securing mechanism and a securing lock mechanism according to an embodiment of the present invention, where (a) is a top view and (b) is a left side view. It is a left view of the connecting rod which concerns on one Embodiment of this invention. (a) is a left side view of the loading platform showing the loading / unloading operation of the container, and (b) is an enlarged view of the connecting portion of the dump arm and the swing arm in the lashing release state. (a) is a left side view of the loading platform showing the dumping operation of the container, and (b) is an enlarged view of the connecting portion between the dump arm and the swing arm in a locked state.

Explanation of symbols

1 chassis 2 subframe 3 container a1 dump arm a2 swing arm a3 tilt arm b connecting rod b1 spring c1 dump cylinder c2 tilt cylinder f securing hook f1 hook locking shaft f2 engaging end p1 rotating fulcrum p2 rotating fulcrum p3 times Moving fulcrum p4 Rotating fulcrum p5 Rotating fulcrum r Locking lock mechanism r1 Lock lever r2 Operation pin r3 Lock pin r4 Return spring r5 Stopper r6 Contact member

Claims (5)

A dump arm whose base end is rotatably supported at the rear of the chassis,
A swing arm rotatably connected to the dump arm;
A dump cylinder having one end connected to the swing arm and the other end fixed on the chassis;
A lashing hook for lashing the dump arm and the swing arm;
A lashing hook operating mechanism for operating switching between a lashing state in which the dump arm and the swing arm are lashed by the lashing hook, and a lashing releasing state in which the lashing is released;
The swing arm is rotated with respect to the dump arm that has fallen on the chassis by the dump cylinder in the unlocked state, and a loading / unloading operation of the container connected to the tip side of the swing arm is performed,
With the dump cylinder in the locked state, the swing arm and the dump arm are integrated and rotated from the chassis around the pivot fulcrum of the dump arm and connected to the tip side of the swing arm. In a cargo handling vehicle that performs dumping operation of existing containers,
A cargo handling vehicle having a lash-locking mechanism that locks the dump arm in the lashed state when the dump arm rises more than a predetermined angle from the chassis. A dump arm whose base end is rotatably supported at the rear of the chassis,
A swing arm rotatably connected to the dump arm, and a tilt arm rotatably connected to the swing arm;
A dump cylinder having one end connected to the swing arm and the other end fixed on the chassis;
A tilt cylinder that drives the pivoting movement of the tilt arm relative to the swing arm;
A lashing hook for lashing the dump arm and the swing arm;
In conjunction with the pivoting operation of the tilt arm, the locking operation is performed to switch between a locked state in which the dump arm and the swing arm are locked by the locking hook and a locked state in which the dump arm is released. A binding hook operating mechanism,
The swing arm is rotated with respect to the dump arm that has fallen on the chassis by the dump cylinder in the unlocked state, and the container connected to the tip of the tilt arm is loaded and unloaded,
The swing arm and the dump arm are integrated with the dump cylinder in the locked state and are pivoted from the chassis around the pivot arm of the dump arm and coupled to the tip of the tilt arm. In cargo handling vehicles that perform container dumping operations,
A cargo handling vehicle having a lash-locking mechanism that locks the dump arm in the lashed state when the dump arm rises more than a predetermined angle from the chassis.   2. The lashing lock mechanism is supported by a tip end portion of the dump arm, and unlocks when it interferes with a member fixed on the chassis, and locks when separated from the member. Alternatively, the cargo handling vehicle according to claim 2. The lashing hook is rotatably supported by the swing arm, and ties the dump arm and the swing arm by being locked to the dump arm.
The lash locking mechanism is
A lock lever that is rotatably supported by the dump arm, and engages with the lashing hook by rotating in one direction to lock the lashing hook in the lashed state;
A spring for biasing the lock lever in the one direction,
When the dump arm falls on the chassis, the lock lever rotates in a direction opposite to the one direction until the lock lever interferes with a member fixed on the chassis and the lock is released. The cargo handling vehicle of Claim 1 or Claim 2. The lashing hook operating mechanism is
A connecting portion formed at the lower end of the tilt arm;
A connecting rod having one end hinged to the connecting portion and the other end hinged to the lashing hook;
5. The cargo handling vehicle according to claim 4, wherein the connecting rod extends against a holding force of the securing hook by the lock lever.

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