RU104584U1 - GLUED BUILDING BEAM - Google Patents

Abstract

 Glued building beam, including upper, lower and side face plates made of lumber, characterized in that its internal cavity is equipped with a system of channels evenly spaced in it for placement of insulating filler formed of long lamellas made of thin lumber laid relative to each other along the height of the beam with a gap formed by stiffening bars, while the sections intended for the formation of the mounting joints of the beam are equipped with of short-length sawn thin lamellae placed between the long-length lamellae to form a monolithic laminated elements, wherein all connections are fixed with glue and pressed.

Description

The utility model relates to construction and can be used in the manufacture of glued wooden beams used for various building structures.

Known building beam made from a log by sawing it out from the central part of the log, at the same time obtained segmented wooden elements, which usually do not find proper use. (U.S. Patent No. 4,143,692, publ. 13.03.79).

The disadvantages of the known technical solutions are the high wood intensity, energy intensity and the complexity of the manufacturing process, as well as the low volume of use of sawlog wood.

Known glued building timber, including the upper, lower and lateral front layers made of lumber and placed in its inner cavity formed a package of milled boards, offset relative to each other with the formation of grooves on one side and protrusions on the other side and fixed between themselves by glue and press fitting. (Patent RU 2381338, publ. 10.02. 2008 - prototype).

The disadvantages of the known technical solutions are the high wood intensity due to the use of a large amount of wood, which is used as commercial wood, the complexity of the manufacturing process due to the need for milling boards with protrusions and the complex formation of a package from them, low thermal and acoustic properties of the timber. It should be noted that when forming the mounting joints of the beam, namely, the connecting grooves and ridges, sections of the beam are cut, at which its internal structure opens, which leads to a decrease in acoustic and thermal insulation properties.

The technical problem of the utility model is to increase the efficiency of timber construction by reducing the timber intensity of the timber by reducing the use of wood, in particular the use of commercial wood, as well as through the use of thin lumber 16 and 19 mm thick, sawn from the side of sawing logs (usually without application) and glued along the seam and along the edge, as well as by increasing the acoustic and thermal insulation properties of the beam and reducing the complexity of the process of manufacturing the beam.

This goal is achieved by the fact that in the glued building beam, including the upper, lower and side face plates made of lumber, its internal cavity is equipped with a system of channels evenly spaced in it for placement of insulated aggregate formed by long lamellae made of thin lumber, stacked relative to each other along the height of the beam with a gap formed by the stiffness bars, while the areas intended for the formation of the mounting joints of the beam are provided with wives made of thin lumber with short lamellas placed between long lamellas with the formation of monolithic glued elements, and all connections are fixed with glue and pressed.

The utility model has the following differences from the prototype:

- the internal cavity of the beam is equipped with a system of channels evenly located in it for placement of an insulating filler in them;

- the channels are formed of long lamellas made of thin lumber, laid relative to each other along the height of the beam with a gap formed by stiffness bars;

- the areas intended for the formation of the mounting joints of the timber are equipped with short-length lamellas made of thin lumber placed between long-length lamels with the formation of monolithic glued elements;

- all connections are fixed with glue and pressed in.

This will make it possible to increase the efficiency of the timber construction by reducing the timber intensity of the timber by reducing the use of wood, in particular the use of commercial wood, as well as by using thin lumber 16 and 19 mm thick, sawn from the runaway part of sawing logs (usually not having use) and glued along the seam and along the edge, increase the acoustic and thermal insulation properties of the beam, reduce the complexity of the process of manufacturing the beam.

No technical solutions with the claimed combination of features were found in the patent information fund we reviewed.

The claimed technical solution is applicable and will be implemented in the industry in 2011.

Figure 1 shows a diagram of a glued building beam, a longitudinal section;

Figure 2 is the same, a section along aa in figure 1;

Figure 3 is the same, a section along BB in figure 1;

In Fig 4 shows a diagram of the assembly of the beam at the first stage, a longitudinal section;

Figure 5 shows a diagram of the assembly of a beam with a filler;

Figure 6 shows a diagram of the gluing of the beam.

Glued building beam 1 includes upper 2, lower 3 and side 4 and 5 face plates made of lumber 6. The inner cavity of the beam 1 is equipped with a system of 7 channels 8 evenly spaced therein to accommodate an insulating filler 9 formed by long lengths made of thin lumber lamellas 10, laid relative to each other along the height of the beam with a gap 11, formed by the bars 12 stiffness, while sections 13 and 14, designed to form the mounting joints of the beam, respectively, under the "legs" and "cups" equipped with short-length lamellas 15 made of thin lumber, placed between long-length lamellas 10 to form monolithic glued elements 16 and 17, all joints being fixed with glue and pressed in.

Glued construction timber is made as follows.

Lumber is cut, including thin edged lumber, as well as thin edged short lumber from the side of sawing logs. After sawing, the lumber is dried to the required humidity, which is determined by the operating conditions and the requirements of the adhesive manufacturers. If necessary, vice is cut out of lumber and (or) they are fused along the length and width to obtain lamellas of the required section and length. To ensure the bonding strength, technological exposure is carried out, the duration of which is determined by the properties of the binder. After that, the milling of lumber and their sorting in the direction of the wood fibers is carried out.

The beam is formed in two stages.

At the first stage (Fig. 4), glue is applied to the lamella for the front lower layer 3 of the beam (having a length and width equal to the dimensions of the finished beam) and placed in an assembly device installed in the press; stiffness bars 12 are laid on it through each meter of length, and in its sections 13 and 14, designed to form the mounting joints of the beam, short-length lamellas 15 made of thin lumber with glue applied to them are laid under thin legs. Next, they lay on them, made of thin lumber, a long-sized lamella 10 (having a length and width equal to the dimensions of the finished beam) with glue applied to it. Next, stiffness bars 12 are laid on it through each meter of length, and in its sections 13 and 14, designed to form the mounting joints of the beam, short-length lamellas 15 made of thin lumber with glue applied to them are placed under the “legs” and “cups,” respectively.

The process is repeated until the desired height of the beam is reached, on which the front lamella is laid on top for the upper layer 2 of the beam without applying glue. After the assembly of the bar blank, it is pressed and the process is held to achieve the required strength of the adhesive joints. The height of the stiffening bars 12 and short-sized lamellas 15 can vary between 10-20 mm to ensure the required dimensions of the timber. It should be noted that short-length lamellas 15 are placed between long-length lamellas 10, forming monolithic glued elements on sections 13 and 14, intended for forming the mounting joints of the beam, respectively, under the “paws” and “cups”, which ensures the integrity of the structure of the beam, high strength in connection boards with each other and the preservation of acoustic and thermal insulation properties.

Next, the resulting blanks are milled along the edges and placed in the second assembly press with a rotation around the axis by 90 °. The blanks are placed on the front lamella for the side plate 4 of the timber (having a length and width equal to the dimensions of the finished timber), on which glue is previously applied, and a filler is placed in the voids (Fig. 5), which can be made in the form of mineral wool, as well as mixed with a binder of dry shavings, sawdust, etc. After that, a face lamella is applied to the blank for the side plate 5 of the beam (having a length and width equal to the dimensions of the finished beam) onto which glue is preliminarily applied and the finished product is glued (Fig. 6).

After the technological exposure necessary to achieve the required strength of the adhesive joint, in the sections 13 and 14 of the mounting joint of the boards, “cups” and “paws” are milled to each other, the board is marked and packaged.

A set of lamellas is preferred, providing a multidirectional arrangement of wood fibers in adjacent lamellas to reduce the effect of wood anisotropy under the influence of humidity during the operation of the beam. The greatest structural strength is achieved when using wood with a radial direction of the fibers.

The width of the lamellas placed in the inner cavity of the timber depends on the type of wood used and is determined by its physical and mechanical characteristics.

The width of the beam is due to climatic conditions and may vary. At the latitude of St. Petersburg, characterized by the following indicators: the average monthly relative humidity in July is more than 75%, the average wind speed over three winter months is more than 5 m / s, the temperature of the coldest five days is 25 ° C (see Construction heat engineering, SNiP 11-3-79, Gosstroy of Russia, 1998) the width of the beam is in the range from 100 (when using insulation, for example in the form of mineral wool) to 250 mm to ensure a normal room temperature at 20 ° C.

To connect the glued elements to each other along the seam, they can be made connecting elements in the form of a tongue and groove, or a profile is created allowing the installation of additional insulation in it.

In height, the building element (beam) consists of at least three layers of wood, with stiffness bars laid between them and a filler of insulating material, and can be from 68 mm high, depending on the architectural and construction requirements for the construction.

Bonding time and pressing pressure are determined by the type of binder used.

Thus, the utility model will increase the efficiency of timber construction by reducing the timber intensity of the timber by reducing the use of wood, in particular the use of commercial wood, as well as through the use of thin lumber 16 and 19 mm thick, sawn from the side of sawing logs (usually not having application) and glued along the seam and along the edge, increase the acoustic and thermal insulation properties of the beam, reduce the complexity of the manufacturing process of the beam.

The use of thin lumber with a thickness of 16 and 19 mm, sawn from the runaway part of sawing logs, which are usually not used and converted into technological chips, increases the volumetric yield of sawn products and, therefore, increases the profitability of the sawing process.

Claims (1)

Glued building beam, including upper, lower and side face plates made of lumber, characterized in that its internal cavity is equipped with a system of channels evenly spaced in it for placement of insulating filler formed of long lamellas made of thin lumber laid relative to each other along the height of the beam with a gap formed by stiffening bars, while the sections intended for the formation of the mounting joints of the beam are equipped with of short-length sawn thin lamellae placed between the long-length lamellae to form a monolithic laminated elements, wherein all connections are fixed with glue and pressed.