RU2836630C1 - Flat rafting unit - Google Patents

Abstract

FIELD: floating structures adapted for special purposes.

SUBSTANCE: invention relates to timber rafting, particularly to flat rafting units. Flat rafting unit contains one or more transverse rows of round timber covered along sides with a limiting net. Network includes horizontal flexible links and consists of two sections. Each section has upper and lower rigid links. Rigid links are provided with lugs at the ends and are placed on rows of round timber with reference to their ends at distance of 0.5 m. Upper and lower rigid links of both sections are connected to each other through lugs by horizontal flexible links. Upper and lower rigid links of each section are connected to each other through lugs by vertical flexible links.

EFFECT: increased rigidity and simplified design of flat rafting unit.

1 cl, 3 dwg

Description

The invention relates to timber rafting, in particular to flat timber units, and can be used to supply timber to consumers via waterways.

A flat rafting unit is known (Patent No. 2477698 of the Russian Federation; IPC B63B 35/62, B65B 27/10; published on 20.03.2013), containing an aligned row of round timber connected to each other by two strappings, each of which is made in the form of a flexible thread with upper and lower branches, on the free ends of which cargo loops are mounted. Vertical ties and locking clamps are movably mounted on the upper branches of the flexible threads of the strappings. Each vertical tie is made of a steel rod in the form of a bracket with a length equal to 0.75 of the average diameter of the logs in a row of round timber, and in its middle part a groove is formed with a width equal to the diameter of the flexible threads, for inserting the lower branch of the flexible thread into the vertical tie. The upper and lower branches of each flexible thread encircle every two logs in a row of round timber and are stopped at the ends with stop fasteners.

The disadvantage of this flat rafting unit is the low rigidity of its construction.

A flat rafting unit is known (Patent No. 1461583 France; IPC B63B 35/62; published on 25.02.1966), containing a transverse row of round timber, covered along the sides with a limiting net, including horizontal flexible ties. The limiting net also includes an upper lyktros, equipped with floats and pendants with rings, and a lower lyktros, having pendants with rings and extreme rings, while the horizontal flexible ties are threaded twice through the rings of the pendants of the upper and lower lyktros, and also once through the extreme rings of the lower lyktros. Each horizontal flexible tie after tightening is attached to the tug. Adopted as a prototype.

The disadvantages of this flat rafting unit are its low rigidity and the complexity of its design.

The problem that the invention is aimed at solving is to increase the rigidity and simplify the design of a flat rafting unit.

This is achieved by the fact that in a flat rafting unit containing one or more transverse rows of round timber, covered along the sides with a limiting net including horizontal flexible ties, according to the invention, the limiting net consists of two sections, wherein each section has upper and lower rigid ties which are equipped with lugs at the ends and are applied to the rows of round timber at a distance of 0.5 m from their ends, wherein the upper and lower rigid ties of both sections are connected to each other through lugs by horizontal flexible ties, and the upper and lower rigid ties of each section are connected to each other through lugs by vertical flexible ties.

The presence of upper and lower rigid connections of the sections of the restrictive net, which are equipped with lugs at the ends and are applied to the rows of round timber with a distance of 0.5 m from their ends, as well as the connection of the upper and lower rigid connections of both sections to each other through lugs with horizontal flexible connections and the upper and lower rigid connections of each section to each other through lugs with vertical flexible connections do not allow the round timber to move when the forces in the flexible connections are weakened, which ensures the preservation of the original shape of the flat rafting unit and, as a result, increases the rigidity of its structure.

The use of upper and lower rigid ties of the sections of the boundary net, which are equipped with lugs at the ends and are applied to the rows of round timber with a distance of 0.5 m from their ends, as well as the connection of the upper and lower rigid ties of both sections to each other through lugs with horizontal flexible ties and the upper and lower rigid ties of each section to each other through lugs with vertical flexible ties, make it possible to exclude from the design of a flat rafting unit the upper and lower lykroes, floats, pendants with rings and extreme rings and, consequently, to simplify it.

Fig. 1 shows a diagram of a flat rafting unit, side view; Fig. 2 - the same, front view; Fig. 3 - the same, top view.

A flat timber unit comprises one or more transverse rows of round timber 1, covered along the sides with a restrictive net 2 consisting of two sections, wherein each section of the restrictive net 2 has upper 3 and lower 4 rigid ties, which are equipped with lugs 5 at the ends and are applied to the rows of round timber 1 at a distance of 0.5 m from their ends, wherein the upper 3 and lower 4 rigid ties of both sections are connected to each other through lugs 5 by horizontal flexible ties 6, and the upper 3 and lower 4 rigid ties of each section are connected to each other through lugs 5 by vertical flexible ties 7.

The flat rafting unit is assembled as follows. First, the first section and then the second section of the restrictive net 2 are laid out on the rafting site so that their lower rigid connections 4 are directed towards each other and equidistant. In this case, the distance between the lower rigid ties 4 of both sections should be such that after laying one or more transverse rows of round timber 1 on the lower rigid ties 4, there is a distance of 0.5 m from the ends of the round timber 1 to the lower rigid ties 4. Next, lay one or more transverse rows of round timber 1 on the lower rigid ties 4 while maintaining a distance of 0.5 m from the ends of the round timber 1 to the lower rigid ties 4. After this, place the upper rigid ties 3 of the sections on the upper row of round timber 1, pull the horizontal flexible ties 6 through the lugs 5 and connect the upper 3 and lower 4 rigid ties of both sections to each other, respectively. Then, through the eyes 5, the vertical flexible ties 7 are pulled and the upper 3 and lower 4 rigid ties of each section of the restrictive net 2 are connected to each other. Thus, the flat raft unit is ready to be lowered into the water.

The flat rafting unit is disassembled as follows. At the anchorage, the vertical 7 and horizontal 6 flexible ties are first removed from the flat rafting unit. Then, the upper rigid ties 3 of the sections are removed from the upper row of round timber 1 and the rows of round timber 1 are disassembled. After this, the released sections of the restrictive net 2, as well as the horizontal 6 and vertical 7 flexible ties, are folded and transported to the place where the flat rafting units are manufactured.

This embodiment of the claimed invention allows for increased rigidity and simplification of the design of the flat rafting unit.

Claims (1)

A flat timber unit containing one or more transverse rows of round timber covered along the sides with a restrictive net including horizontal flexible ties, characterized in that the restrictive net consists of two sections, wherein each section has upper and lower rigid ties which are equipped with lugs at the ends and are applied to the rows of round timber at a distance of 0.5 m from their ends, wherein the upper and lower rigid ties of both sections are connected to each other through lugs by horizontal flexible ties, and the upper and lower rigid ties of each section are connected to each other through lugs by vertical flexible ties.