JP2001277810A - Truck for trailer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent sunk casters of a truck, having a trailer supporting table at the ceiling part and casters to project by springs mounted on the lower part, from projecting when the front of a trailer is raised from the surface of the trailer supporting table by the rocking of a hull, which may cause the unexpected moving of the truck and lead to a serious accident. SOLUTION: An elevating table 2 is disposed at the ceiling part of the truck main body 1. An elevating frame 6 energized downward by springs 9 is disposed lower inside the main body 1, and casters 7 are mounted under the elevating frame 6. Support arm frames 11 and 11 are attached on left and right sides of the elevating frame 6, and a bell crank 13 linked with a lever 17 is disposed inside each arm frame 11. The free end of the crank 13 raises the support arm frame 11 with the swing of the lever 17 to sink the elevating frame 6 and casters 7 in the main body 1, and the sunk condition is maintained by the fixing of the lever 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trailer pulled by a tractor into a ship, and more particularly to a trailer bogie for supporting a front portion of a trailer separated from the tractor from below a trailer on a floor of a ship.

[0002]

2. Description of the Related Art Each trailer that is loaded and separated from a tractor on the floor of the ship has a front wheel, and a trailer bogie is provided on a portion corresponding to the front wheel so as to support the lower surface of the trailer. Is done.

[0003] A table is arranged on a ceiling portion of a bogie main body assembled into a truncated quadrangular pyramid by a frame material group, and the table responds to the expansion and contraction movement of a jack ram mounted in the bogie main body. And go up and down.

On the other hand, at the lower part of the bogie main body, four caster groups of a pair of fixed casters and movable casters on the right and left sides are installed so as to be able to protrude and protrude from the lower surface of the bogie main body. When the truck does not support the trailer, that is, when no load is applied to the table portion of the truck, the caster group is urged by a powerful spring and protrudes from the lower surface of the truck body to freely move the heavy truck. It enables easy movement.

On the other hand, when the table of the truck rises, abuts against the lower surface of the trailer, supports the trailer from below, and when a large load acts on the truck itself, the spring is compressed and the casters are moved inside the truck body. The lower horizontal frame material of the frame material that makes up the bogie body abuts on the floor of the ship, the bogie sits on the ship floor, is prevented from moving, and damage to the caster group is avoided. You. Executing the caster group on the lower surface of the bogie main body via the spring in this way can be expected to have remarkable effectiveness in terms of simplifying the mechanism and speeding up the operation.

[0006]

A group of casters that are buried in the bogie body in response to the movement of the spring compressed by the load of the trailer ensures that the bogie is fixed on the floor. However, the trailer, especially the front part of the trailer swings up and down with the hull rolling, pitching, etc. The spring in the compressed state rebounds and expands, the casters protrude from the lower surface of the bogie main body, and an unexpected moving situation on the floor of the bogie occurs in response to the swing of the hull.

[0007] This unexpected movement of the bogie from a predetermined position will destroy the stationary environment of the trailer, and in the worst case, the bogie that has deviated from the support state with the trailer will cause a collision between the bogie and the trailer or between the bogies. It causes the worst. In this manner, the movement of the caster group from the lower surface of the bogie main body via the spring can easily execute the movement of the bogie, and there are many advantages such as simplification in mechanism, but on the other hand, the bogie itself is Unexpected movements leave a number of problems with danger.

According to the present invention, even if the trailer supported by the bogie supports the forward portion, the bogie is equipped with casters that protrude from the lower surface of the bogie main body through the spring even when the trailer swings. It is an object of the present invention to provide a trailer bogie that can prevent and prevent the occurrence of a number of situations accompanied by the danger of personal injury and even property damage in the worst case.

[0009]

In order to achieve the above object, the present invention employs the following configuration. In the truck for trailer according to the present invention, a table supporting the trailer is disposed on the ceiling of the truck body assembled with the frame material so as to be able to move up and down with a jack placed on the truck body, while a spring is provided on the bottom of the truck body via a spring. It is equipped with a caster group that can appear and disappear.

[0010] In the truck for a trailer based on the above configuration, means for forming a group of casters on the truck to be buried in the body of the truck against the pressing force of a spring, and a state of burial of the group of casters. A burying control mechanism for caster groups, which is composed of both means for sustaining, is attached to the bogie.

In the caster group burying control mechanism, a pair of left and right support arm frames are attached to a rectangular frame in plan view, which is formed by assembling a frame member equipped with a caster group on a lower surface and a spring group on an upper portion. Inside each of these bearing arm frames, a bell crank that rotates synchronously with a single lever is arranged, and the bearing arm frame opposes the spring at the top dead center of the free end of the bell crank. The free end of the bell crank maintains a fixed position for a long period of time by burying the caster group in the bogie main body accompanying this and burying the caster group and stopping the lever in this buried state.

[0012]

After the tractor is separated from the trailer towed on the ship floor, the bogie moves to the lower surface position of the front part of the trailer, and the bogie movable by the caster group secures a predetermined position. After that, the caster group activates the caster burial control mechanism attached to the cart to bury all the casters in the cart body.

[0013] By intentionally maintaining the buried state of the casters, the jack is activated to raise the table in a situation where the bogie itself is seated on the ship floor without passing through the caster group, and the table is lifted. The table abutting on the lower surface of the vehicle secures a predetermined ascending position, and the work of supporting the truck at the front portion of the trailer is completed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a truck for trailer according to the present invention will be described with reference to the drawings. The bogie main body 1 is formed by assembling a frame material group made of pine wood into a truncated quadrangular pyramid as a whole shape. A table 2 is arranged on a ceiling surface of the bogie main body 1, and the table 2 is
A lock handle 5 for securing the vertical position of the table 2 is screwed to the ram 4 fixed to the upper end of the ram 4 of the hydraulic jack 3 loaded therein and extending and contracting in the vertical direction.

An elevator frame 6 having a rectangular shape in a plan view is mounted on the lower part of the carriage body 1 so as to be able to ascend and descend with a predetermined stroke, and approximately four corners on the lower surface of the elevator frame 6 are indicated by arrows in FIG. A pair of left and right fixed casters 7A, 7A is mounted on the front side in the traveling direction of the bogie, and a pair of left and right free casters 7B, 7B are mounted on the rear side of the bogie.

Above the lifting frame 6, a group of washers 8 fixed to the bogie body 1 is disposed substantially above the four caster groups 7A and 7B. Four spring groups 9 are interposed between the washer 8 and the lifting frame 6, and the lifting frame 6 pressed downward by these springs 9 is urged in the descending direction, whereby the caster groups 7A,
7B is configured to protrude from the lower edge horizontal frame member 1A constituting a part of the bogie main body 1, that is, from the lower surface of the bogie main body 1.

In the group of casters 7A and 7B in the protruding state, the bogie weighing 200 kg can freely move on the ship floor, and the bogie in the state movable in this group of casters moves to a predetermined position. Is configured to be able to be stopped by the foot stopper 10.

In the conventional bogie located on the lower front side of the trailer, the load on the trailer sinks the bogie main body 1 toward the ship floor by supporting the trailer on the table 2 of the bogie. Each of the casters 7A and 7B has a spring group 9
Buried in the bogie main body 1 against the above, the load of the trailer is stabilized by the horizontal frame members 1A constituting the bottom portion of the bogie main body in contact with the ship floor, and as a result, the casters 7A and 7B are protected.

It is desirable that the caster group is reliably prevented from protruding from the lower surface of the bogie body 1 while the trailer is supported by the bogie.
When the front part of the trailer is temporarily lifted due to pitching, the movement of the bogie when the casters protrude instantaneously is associated with great danger.

In the present invention, after the truck is moved to the predetermined position below the trailer, the casters are intentionally buried in the truck main body, and the movement of the casters that keeps the buried state is restricted. It is characterized by having a mechanism attached.

Specifically, one example is disclosed in the inside of the lifting frame 6 mounted on the lower surface of the caster group assembled with a frame member having a rectangular shape in a plan view, which is disposed at a lower position inside the bogie main body 1. Channel-type support arm frames 11, 11 which extend in the front-rear direction of the pair of right and left carts and guide rollers to be described later are additionally attached and fixed. The lifting movement of the pair of support arm frames 11, 11 is controlled by a lever crank mechanism 12, and thus the lifting frame 6 against the spring 9 is extended.
The width of the vertical movement is controlled.

Bell cranks 13 are disposed in a pair of left and right support arm frames 11, respectively, and a crank shaft 14 forming a fulcrum of the bell crank 13 is attached to a jack fixing stand 3 A in the bogie main body 1. , Bell crank 1
A roller 15 that rotates and slides along the inner surface of the bearing arm frame 11 is provided at a free end constituting the load point No. 3 and a connecting rod 16 is provided between the other ends constituting the power points of the pair of bell cranks 13. The lever 17 is fixed to one end of the connecting rod 16 at a predetermined crossing angle (see FIG. 6).

The lever crank mechanism 12 constructed as described above
5, when the lever 17 shown in FIG. 5 is folded forward in a nearly upright state, the roller 15 is located at the front bottom dead center along the inner side surface of the support arm frame 11 and is in the lowered position. A pair of left and right support arm frames 11 and 11, and furthermore, the lifting frame 6 are urged by the spring 9 to descend, and the caster group 7
A and 7B protrude from the lower surface of the bogie main body 1.

Conversely, when the lever 17 is moved backward in the direction opposite to the direction indicated by the arrow in FIG. 1, the roller 15 moves rearward along the inner surface of the support arm frame 11, and When 15 reaches the top dead center, the spring 9 is compressed, the lifting frame 6 is lifted up against the spring and rises, and the casters 7A and 7B are buried in the bogie main body 1 with this. While the lever 17 secures a predetermined position via an appropriate stopper, the bogie main body 1 sits directly on the ship floor without damaging the caster groups 7A and 7B,
Even when the front part of the trailer is temporarily lifted on the bogie, the protruding movement of the caster group from the bogie main body 1 is reliably prevented, so that unexpected movement of the bogie is avoided.

[0025]

According to the present invention, a truck for trailer, which controls a group of casters protruding from the underside of the truck through a spring,
Excellent in both simplicity of mechanism and simplicity of operation. Then, when the load of the trailer acts on the bogie, the caster group is buried in the bogie body naturally against the spring force, and the bogie itself is directly seated on the floor of the bogie itself, and this state is maintained. As long as the original purpose of the bogie can be achieved as far as possible, or even in the event of unexpected lifting of the front part of the trailer that occurs when the hull swings, the present invention provides a temporary release of the trailer load to the bogie. At times, the protruding movement of the caster group from the bogie main body is suppressed, so that unexpected movement of the bogie itself can be avoided, and various dangers and adverse effects associated with the bogie movement can be prevented beforehand and surely.

According to the present invention, the burying operation of the caster group and the continuation of the burying state can be achieved at the same time by a single operation of the lever by employing the lever crank mechanism. , Will be sure.

[Brief description of the drawings]

FIG. 1 is a side view in which a part of a folded cart with a caster embodying the present invention protruding is cut away.

FIG. 2 is a rear view of the carriage in the state shown in FIG.

FIG. 3 is a partially cutaway side view of the trolley of the trolley shown in FIG. 1 in which casters are buried.

FIG. 4 is a rear view of the carriage in the state shown in FIG.

FIG. 5 is a side view of a lever crank mechanism for lifting a support arm frame (elevation frame).

FIG. 6 is a rear view of the lever crank mechanism shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bogie main body 2 Table 3 Hydraulic jack 6 Elevating frame 7A Fixed caster 7B Swivel caster 9 Spring 11 Bearing arm frame 12 Lever crank mechanism 13 Bell crank 14 Crank shaft 15 Roller 17 Lever

Claims (2)

[Claims] A trolley equipped with a table which rises and lowers on a ceiling surface of a trolley main body in which a frame material group is assembled and a caster group which protrudes from a bottom surface of the main body via a spring. A trolley for trailers, which is provided with a caster burial control mechanism for burying the trolley in the trolley body and maintaining the buried state. 2. A table which rises and lowers on a ceiling surface of a bogie main body in which a frame material group is assembled, and a rectangular raising / lowering frame disposed in a lower part of the bogie main body in plan view are provided with a caster group on a lower surface thereof. It is always urged downward by a spring arranged at the top, and a supporting arm frame is attached to each of the left and right sides of the lifting frame, and a bell crank interlocked with the turning of the lever is provided inside the supporting arm frame. A truck for trailer, which is arranged, and allows the lifting frame to be lifted, and furthermore, the caster group to be buried in the bogie body, and the buried state to be maintained by lifting and fixing the bearing arm frame by the free end of the bell crank.