JPS59261Y2 - Bolster tightening device for container trailer - Google Patents

Description

[Detailed description of the invention] This invention relates to a bolster tightening device for a special trailer that carries, for example, a shipping container, and in particular, when tightening a front bolster with a locking mechanism, the locking pin of the locking mechanism is inserted into the vehicle body. The lock holes in the chassis frame have been improved to make it easier to adjust the sliding position of the front bolster and to prevent rattling when the vehicle is tightly tightened.

Conventionally, in this type of dedicated trailer, a front bolster and a rear bolster are installed on both the front and rear parts of the chassis frame of the vehicle body on which the container body is mounted, and the container body is positioned and tightened between the two bolsters to secure the container body. Prevents movement displacement.

In particular, the front bolster is arranged so as to be slidably adjustable in the front-rear direction depending on the length of the container body, and is tightened by a locking mechanism at an appropriate sliding position.

However, such a conventional tightening device has a locking pin of a locking mechanism installed on the front bolster inserted into a locking hole formed in a chassis frame made of an I-beam of the vehicle body, so it is particularly difficult to tighten the chassis. When processing a thick part such as a frame, manufacturing tolerances are large and the lock hole has a diameter close to that of a so-called "dumb hole", so there is a gap between it and the lock pin.
This has caused various problems, such as rattling in the front bolster.

This invention is aimed at solving the above-mentioned conventional drawbacks, and will be explained below based on the illustrated embodiment.

As shown in Figures 1 to 3, 1 in the figure is a trailer exclusively for containers, and a front bolster 3 is slidable in the longitudinal direction on a chassis frame 2 consisting of a pair of left and right ■-shaped beams at the front of the vehicle body. The chassis frame 2 is mounted horizontally, and a slide rail 21 made of an L-shaped beam is connected to the outside surface of the front bolster sliding range of the chassis frame 2 by bolts.

Reference numeral 22 in the figure indicates a lock hole formed in the chassis frame 2 and the slide rail 21, and a plurality of lock holes are provided at predetermined intervals in the longitudinal direction of the vehicle body.
2 is a relatively large-diameter through-hole 2a previously drilled in the chassis frame 2 during the vehicle body manufacturing stage, and a through-hole 2a with a smaller diameter than the through-hole 2a that is precisely machined in the slide rail 21. It is formed by matching the .

Reference numeral 4 in the figure denotes a guide shoe attached to the lower surface of the front bolster 3 via a bracket 5, which engages with the slide rail 21. A retractable lock pin 6 is slidably provided.

Furthermore, reference numeral 7 in the figure is an operating lever installed at the center of the front bolster 3 in the width direction of the vehicle, and is connected to the connecting rod 8 and the link 9.
, 10, the lock pin 6 is inserted into the lock hole 21 and is movable in the lock release direction (indicated by the solid arrow).

Note that 11 in the figure always keeps the lock pin 6 in the lock hole 22.
This is a spring that biases in the insertion direction.

Therefore, according to the above configuration, the front bolster is arranged on the chassis frame made of an I-shaped beam at the front of the vehicle body so as to be slidable in the longitudinal direction, and the front bolster is provided in the lock hole formed in the chassis frame. In order to insert and tighten the lock pin of the lock mechanism, the lock hole is a slide rail made of an L-shaped beam that has been drilled with high precision into a relatively large-diameter transparent hole drilled in the chassis frame. Since the through holes are formed so as to correspond to each other and face each other, the accuracy of the drilling of the lock hole is improved and the insertion and engagement with the lock pin can be ensured, so that rattling of the bolster can be prevented.

In addition, since the guide shoe of the bolster slides on the chassis frame via the slide rail, the slide rail can be replaced even if the slide surface wears out, and the lock hole and lock pin are always maintained stably. This has excellent practical effects, such as being able to align the two.

[Brief explanation of the drawing]

Fig. 1 is an explanatory view showing an embodiment of a container trailer equipped with a bolster tightening device according to this invention, Fig. 2 is an enlarged perspective view of the main part of the front part of the trailer, and Fig. 3 also shows the tightening mechanism. FIG. 3 is an enlarged cross-sectional view of main parts. 1... Trailer, 2... Chassis frame, 2a... Through hole, 21... Slide rail, 21 a... Through hole, 22...
・Lock hole, 3...Front bolster, 4...
... Guide shoe, 5 ... Bracket, 6.
...Lock pin, 7.8.9.10.11...
...Lock mechanism.

Claims (1)

[Scope of utility model registration request] A front bolster is arranged on a chassis frame consisting of an I-shaped beam at the front of the vehicle body so as to be slidable in the longitudinal direction, and a lock pin of a locking mechanism provided on the front bolster is inserted into a lock hole formed in the chassis frame. When tightening the lock hole, the lock hole is made to correspond to the through hole of the slide rail made of an L-shaped beam, which has been drilled with high precision, and is brought into contact with the through hole drilled in the chassis frame to a relatively large diameter. A bolster tightening device characterized by forming.