FI83118C - Clamping bolt for mounting logs - Google Patents

Description

1 83118

KIRl STYSPULITI FOR ASSEMBLING LOG TIME STRUCTURES

The invention relates to a clamping bolt for assembling log structures, which clamping bolt comprises a spring housing with a collar, a spring member movably mounted in the spring housing and a bolt placed between the bolt r> and the spring housing, and an arm portion adjustably attached to the bolt.

In practice, the log buildings are assembled 10 by stacking the logs on top of each other and inserting wooden pins in the holes drilled in the logs to bind the structure. The worst aspect of wooden pins is that the structure is not made tight enough because the wooden pin does not say that it presses the logs against each other. As they dry, the logs shrink and often twist. This only exacerbates the problem and there are often cracks in the structure. Cracks are easily formed in the upper parts of the ends of buildings in particular, because when the building is heated, the heat rises upwards and shrinkage occurs the most in these logs. At the top, the weight of the logs II * 20 is also often so small that they cannot press the kennel tightly enough.

When assembling log buildings, it is known to make holes in the logs which extend in the height direction of the building from top to bottom 25. A long, top-down tightening bolt is placed in these holes, which is tightened in place by means of nuts. Tightening bolts are difficult to install due to their length. In addition, the tightening bolts have to be tightened 30 from time to time after the completion of the building to ensure the tightness of the wall structure.

The object of the invention is to provide a clamping bolt for assembling log structures by means of a clamping bolt. . the above disadvantages are eliminated. It is a further object of the invention 2 83118 to provide a clamping bolt which, when used, makes the log wall easy to assemble.

The object of the invention is achieved by a clamping bolt, which is characterized by what is stated in the claims.

The clamping bolt according to the invention comprises a connecting part fixed to the spring housing, to which the arm part of the second clamping bolt can be detachably fastened. In this case, the clamping bolts mounted on top of each other 10 form a uniform, flexible structure extending through it in the height direction of the log wall. The log wall is easy to assemble, as each clamping bolt extends through only a few logs. In this case, the tightening bolts can be placed in the structure in stages when assembling 15 buildings.

One clamping bolt is preferably arranged to extend through 2-6 logs. In this case, the log wall has several overlapping clamping bolts. In this way, the log building is made airtight, as the springs of each clamping bolt individually press the logs at the clamping bolt · “against each other. The log structure retains its tightness well and • the structure does not need to be tightened later, as tightening is done automatically by means of the spring members of the clamping bolts:: 25.

The invention will now be described in more detail with reference to the accompanying drawing, in which Figure 1 shows an embodiment of a clamping bolt 30 according to the invention seen from the side and partly sectioned, Figure 2 shows a Clamping bolt placed at the top of a log structure seen from the side, partly sectioned and cross-sectioned. Fig. 4 shows an outline for placing the tightening bolts according to the invention in a log wall structure, and Fig. 5 shows a side view of the mounting sleeve of the tightening bolt according to the invention.

According to Figure 1, the clamping bolt according to the invention comprises a spring housing 2 provided with a collar 1, a spring member 3 and a bolt 4 arranged inside the spring housing, an arm part 5 adjustable to the bolt and a connecting part 6 attached to the spring housing. which in this application is a compression spring, is placed between the bolt base 4a and the spring housing. The bolt extends from the spring housing and can be threadedly attached to the arm portion 5. Threads are formed in the connecting portion 6 on the other side of the spring housing, and the arm portion of the second tightening bolt 15 is rotatable and attachable to the connecting portion.

According to Figure 1, the clamping bolt further comprises a fastening member 7 to which the shank part of the clamping bolt can be detachably fastened 20. Figure 1 shows a lock nut as a fastening member 7, which can be pre-assembled in the log by nailing it to a hole. Such a locknut is usually attached to a hole made in the lowest log. When the • · · * clamping bolt is attached to another log, a threaded anchor, for example, can be used. The threaded anchor can be '' provided with a chip groove in a known manner, which prevents clogging.

The tightening bolt shown in Figure 2 is used on the tops of the structure 30. The clamping bolt does not include the actual connecting part, as no other clamping bolt is attached to this clamping bolt.

The clamping bolts are inserted into the log structure by first screwing the shank part into either the fastening element or .. * the connecting part of the second clamping bolt. The 4 83118 spring housing is then inserted into the hole so that the end of the bolt in the spring housing abuts the threaded hole at the upper end of the arm portion. In the embodiment shown, a hex socket bolt is used as the tightening bolt, and the 5-thread free hole formed in the connecting part is dimensioned so that the tightening bolt can be installed in place by means of a hex key inserted through the hole. When tightening the hexagon bolt, the compression spring is pressed into the pile when the spring housing collar meets the obstacle and when twisting is continued. The base of the bolt then presses 10 springs into the pile. The bolt is installed in such a tight position that the collar of the spring housing sinks into the strength of the log.

When connecting the logs together, the mounting sleeve 8 shown in Fig. 5 can be used as an aid to the pre-mounting 15. The sleeve keeps the structure together during the installation of the logs. The sleeves are mounted with a percussion mandrel, and the shank part of the tightening bolt can be mounted in place through the sleeve 8. The sleeve shown in the figure is provided with barbs 8a to improve the adhesion.

20

As shown in Figures 3 and 4, the clamping bolts are superimposed to form a unitary, flexible: * structure. In addition, individual clamping bolts can be placed in the structure. The clamping bolts can be placed at 25 desired locations in the structure.

The invention is not limited to the preferred embodiments shown, but may vary within the scope of the inventive idea formed by the claims.

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Claims (3)

1. An engagement bolt for assembly of timber stock structures, to which the engagement bolt includes a spring housing (2) fitted with flange (1), movably mounted spring elements (3) and bolt (4) into the spring housing, which spring element is positioned between the bolt and the spring housing, and an adjustable shaft portion (5), adjustable to the bolt p1, which is arranged to extend through the log, characterized in that the attachment bolt 10 has a connection part (6) attached to the spring housing (2), in which the shank portion of another abutment bolt can be detachably fastened, the abutment bolts mounted above each other forming a uniform, upright, upright wall of the timber wall through the extending, resilient structure. 2. An engagement bolt according to claim 1, characterized in that an engagement bolt is arranged to extend through 2-6 logs. 3. An engagement bolt according to claim 1 or 2, characterized in that the attachment bolt belongs to a fastening device (7) that • attaches to the lower attachment timber stock at which the shaft portion 25 (5) of the engagement bolt ) can be removably attached.