JPS6010161Y2 - trailer pull rod device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trailer pull rod device, for example, one that connects trailers together or connects a trailer to a towing vehicle.

In recent years, as aircraft have become larger, containers used to transport air cargo have also tended to become larger.

Therefore, the trailers that carry and transport these types of containers inevitably become larger, and the pull rods that connect and tow these containers also tend to become larger and heavier. have.

As a result, it takes a lot of effort to handle the pull rod, and the overall length is long, which poses problems such as when it is not in use, it may obstruct traffic or cause an obstruction. .

The present invention was developed in view of these points, and includes a pull rod connected to the main body frame so as to be rotatable in the vertical direction, and a roller that engages with a cam plate attached to the main body frame on the pull rod. To provide a pull rod device for a trailer, which is equipped with a buffer mechanism having a buffer mechanism, and which allows a pull rod body to be easily moved up and down by the buffer holding mechanism, and also to securely hold the pull rod body in position.

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes a main body frame, and a cam plate 2 is integrally fixed to the center of one end of the main body frame 1 in the longitudinal direction.

This cam plate 2 has a guide recess 3 that is open upward in the center.
is formed, and an arc-shaped cam surface 4 is formed from the outer upper part to the outer lower part.

Furthermore, bearing fittings 5 are integrally fixed to the main body frame 1 on both sides of the cam plate 2.

The guide recesses 3 of the cam plate 2 are provided in the bearing fittings 5 on both sides.
A bearing recess 6 is formed with an upper opening, and an insertion recess 7 is formed in communication with the bearing recess 6 .

Reference numeral 8 denotes a pull rod device, in which a horizontal shaft 10 is integrally fixed to the base end of a pull rod body 9, and this horizontal shaft 10 is rotated inside the guide recess 3 and the bearing recess 6. It is movably inserted, and its both ends are rotatably inserted into the insertion recess 7, and the bearing fitting 5 is provided in the locking grooves 11 formed at both ends of the horizontal shaft 10. A retaining piece 12 is inserted.

The pull rod body 9 is formed into a substantially triangular shape with a central rod 13 and both side rods 14 that widen from the distal end to the proximal end on both sides of the central rod 13. A connecting plate 16 having a connecting hole 15 at the tip thereof.
An upper plate 17 is integrally secured to the upper surface of the connecting portion of the connecting plate 16, and a support plate 19 having supporting legs 18 is integrally secured to the lower surface.

In addition, the central rod 13 has a buffer holding mechanism 2 in its length direction.
0 is attached.

This buffer holding mechanism 20 has a connecting tool 2 on the back side of the central rod 13.
A guide rod 23 is installed in a hollow guide tube 22 fixed via a guide rod 23.
A connecting rod 24 connected to the inner end of the guide rod 23 is disposed at one end of the guide tube 22, and a threaded rod 26 of the support frame 25 is formed in a U-shape at the outer end. A roller 27 that engages with the cam surface 4 is rotatably supported on the support frame 25 via a support shaft 28.

Further, a cap 30 having an insertion hole 29 through which the guide rod 23 is inserted is screwed onto the other end of the guide tube 22, and between the inner end of the cap 30 and the inner end of the connecting rod 24, the A large number of disc springs 31 as spring members are arranged opposite to the guide rod 23 and are inserted into and adjacent to the guide rod 23 so as to be freely advanced and retracted, and the roller 27 is always urged to engage with the cam surface 4 by each separate spring 31. .

Further, a stopper 32 is attached to the outer end of the guide rod 23.

A pair of mounting frames 33 are fixed to both sides of the support plate 19, and mounting shafts 36 protruding from both sides of the upper part of the stand body 35 are rotatably inserted into the support tubes 34 of the pair of mounting frames 33. A coil spring 37 is stretched between the stand body 35 and the support plate 19.

Next, a plurality of wheels 38 are rotatably mounted on left and right sides in the front and back of the main body frame 1 .

Further, U-shaped guide rails are integrally fixed to the center of the main body frame 1 at a predetermined interval, and a movable mount 39 has guide rollers engaged with the guide rails.
A large number of rubber rollers 40 having a large coefficient of friction that frictionally connect with the lower surface of the articles to be carried in and out are mounted on the movable frame 39 so as to be able to move forward and backward. It is provided so that it can be raised and lowered by a lifting mechanism such as a hydraulic cylinder provided therein.

Further, both ends of a chain 42 suspended from sprockets 41 rotatably provided at the front and rear ends of the main body frame 1 are locked to both ends of the movable frame 39, and an interlocking mechanism that interlocks the chain 42 is attached to one of the sprockets 41. A medium 43 and a deceleration mechanism 44 are interlocked, and a high speed output shaft 45 and a low speed output shaft 46 protruding from the deceleration mechanism 44 are protruded from one side of the main body frame 1. An operating handle 47 is attached to 46.

In addition, a large number of rollers 49 are rotatably arranged in the front and back direction and are mounted on the loading platform plates 48 on the main body frame 1 on both sides of the movable pedestal 39. Each rubber roller 40 of the movable frame 39
are starting to appear.

Also, a brake lever 49 is attached to one end of the main body frame 1.
A brake shoe 50 is rotatably attached to the wheel 38 and is interlocked with the brake lever 49 .

In addition, in the figure, a stopper 52 provided removably on the loading platform plate 48 is a stopper 51 removably provided on the side edge of the main body frame 1.

Further, 53 is a hose that supplies oil to a lifting mechanism such as a hydraulic cylinder, and 54 is a hose reel.

With this structure, when the trailer is not in use, as shown in FIG. Install it on top of 5.

As a result, the roller 27 of the buffer holding mechanism 20 is moved to the cam surface 4.
and is pressed against the cam surface 4 by a large number of disc springs 31, so that the vertical state of the pull rod body 9 is maintained and the pull rod body 9 is prevented from falling forward.

Next, when using the trailer connected to a towing vehicle, the pull rod body 9 is moved forward from the state shown in FIG. is pulled out against the coil spring 37, and the pull rod body 9 is supported by this stand 35.

In this case, when the pull rod body 9 is rotated downward about the bearing fitting 5 through its horizontal shaft 10, the roller 27, which is energized by a large number of disc springs 31 provided in the buffer holding mechanism 20, is moved by the cam plate. The cam surface 4 rotates downward from the top to the bottom of the cam surface 4 while being in pressure contact with the cam surface 4 of No. and can be lowered safely.

Furthermore, even if the pull rod body 9 is positioned horizontally, the buffer holding mechanism 20
The roller 27 is located at the lower part of the cam surface 4 by a large number of disc springs 31 and is still in pressure contact with the cam surface 4, and the pressure contact of the roller 27 acts to urge the pull rod body 9 upward, Therefore, the vertical movement of the pull rod body 9 becomes easy,
The draw rod body 9 can be easily connected to a tow vehicle such as a tractor.

Next, when the pull rod body 9 is separated from the towing vehicle and pushed up, the pull rod body 9 is moved by a large number of disc springs 31 and rollers 2.
Since the pull rod body 9 is biased upward through the pull rod body 7, the pull rod body 9 can be easily pushed up regardless of its own weight.

Next, when loading or unloading articles from/to the cargo bed plate 48 of the trailer, the movable pedestal 39 is moved back and forth to position the movable pedestal 39 below the article, and the movable pedestal 39 is raised and its respective rubber rollers 40 are moved back and forth. Press against the bottom surface of the item.

When the movable frame 39 is moved back and forth in the loading/unloading direction, each rubber roller 40 and the lower surface of the article are in pressure contact with each other due to frictional coupling, so that the article can be easily pulled in conjunction with the rotation of the rollers 49 to carry the article in and out.

According to the present invention, a pull rod body is rotatably supported vertically via a horizontal shaft on a bearing fitting of a main body frame on which a cam plate is protruded, and the cam of the cam plate is mounted on the center of the lower surface of the pull rod body. Since the buffer retaining mechanism has a fixed roller that is energized so as to be in pressure contact with the cam surface at all times, when the pull rod body is pushed up and rotated, the buffer retaining mechanism is pulled by the roller that engages with the cam surface. It reliably assists in pushing up the rod, allowing the heavy pull rod to be pushed up and rotated easily and lightly, and when the pull rod is pushed up almost vertically, its rollers are moved by the cam. The vertical state of the pull rod body can be reliably maintained by being press-fitted to the outer upper part of the surface, and there is no risk that the pull rod body will get in the way or cause trouble when not in use.

In addition, when the pull rod body is pulled down and rotated, the buffer holding mechanism uses a roller that engages with the cam surface to reliably suppress and control the rotation of the pull rod body while lowering it, reducing the weight. It is safe because there is no risk of the heavy pull rod body suddenly rotating and falling, and the roller press-fits into the lower part of the outside of the cam surface, making it easy to connect the pull rod body whose posture has been changed to a nearly horizontal position. In addition, it is possible to reliably hold the set position of the pull rod body, and therefore the rotation position of the heavy pull rod body can be easily set, and its structure is also simple. Therefore, it is easy to manufacture.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view of the trailer, Fig. 2 is a plan view of the same, Fig. 3 is a perspective view of the pull rod device, and Fig. 4 is a shock absorbing mechanism of the above. The sectional view and FIG. 5 are back views of the same. 1... Body frame, 2... Cam plate,
4...Cam surface, 5...Bearing fitting, 9...
...Pull rod body, 10...horizontal & 20--
-----Roller, 27...Roller, 31...
...Spring member.

Claims (1)

[Scope of utility model registration request] A main body frame, a cam plate that protrudes from the center of the end of the main body frame and forms an arc-shaped cam surface from the outer upper part to the outer lower part, and a cam plate that extends vertically through a horizontal axis to the bearing fittings on both sides of the end of the main body frame. A rotatably supported pull rod body;
A roller fixed to the center of the lower surface of the pull rod body and movable back and forth to engage with the cam surface of the cam plate is provided at the inner end thereof, and a built-in spring member is provided to bias the roller so that it is always pressed against the cam surface. A trailer pull rod device comprising a buffer holding mechanism.