Stapler system with plastic staples

Abstract

The invention relates to a staple system for fastening underfloor heating pipes during the construction phase of a building. The system consists of at least two different types of staples, arranged alternately in the staple magazine. The spacing of the barbed anchoring parts is such that they do not come into contact with the adjacent staple. This allows the staples in the anchoring area to be twice as thick as those in the pipe-spanning area, without the magazine length exceeding the thickness of the pipe-spanning area multiplied by the number of staples in the magazine. This innovative design of the needle magazine makes it possible to achieve an optimized holding force for the staples without having to accept the disadvantage of fewer staples being able to reach the stapler's intake area. Claims 1-5 describe different possible solutions for this novel design.

Description

[0001] Pipes of an underfloor heating system in a wet system, i.e. pipes embedded in screed, are often attached to the sub-insulation during the construction phase using so-called tacker pins and are thus fixed until the screed has been installed and hardened.

[0002] The staples are held in place by their depth of penetration into the insulation foam or, often, by special barbs on their anchoring elements, which then anchor themselves beneath a film specially bonded to the foam. Since the pipes to be secured are often plastic pipes, which exhibit restoring forces when bent, it is advantageous, and often even necessary, for the staples to have the best possible holding force in the insulation foam or beneath the bonded insulation cover film, especially in rough construction conditions.

[0003] Particularly good holding forces are achieved by front and rear barbs on the anchoring elements of the tacker needles, especially since when anchoring under an adhesive film the anchoring is then rotated 90 degrees to the pulling direction of the pipe to be fixed.

[0004] With the inner and outer barbs on the anchoring elements of a tacker needle, it has been shown that the holding power of the needles is improved when the width of the resistance increases upwards. Such needles have been known for many years, for example, from patent application No. 94104820.9 dated October 5, 1994, filed by Roth GmbH.

[0005] Overall, it can be concluded that a larger needle gauge is advantageous for particularly good anchoring of staples in floor insulation. This is particularly necessary for front and rear barbs.

[0006] A second important quality criterion for a tacker system for securing underfloor heating pipes is the capacity of the tacker's needle holder. On the one hand, the tacker should remain manageable and lightweight; therefore, the magazine holder should not be significantly longer than 1 meter, so that the tool can be gripped while standing, and the position of the handle should not be lower than the upper end of the needle holder. This ensures convenient handling of the tool when inserting the needles. As many needles as possible should fit on this needle holder to minimize the need for reloading.

[0007] On the one hand, there is an effort to increase the holding power of the tacker needles through the barb design, which leads to greater strength in the needles, especially in the area of ​​their anchoring elements. On the other hand, as many needles as possible should fit into the specified holding area of ​​the tacker.

[0008] The aim of the invention was to find a solution to this obvious contradiction.

[0009] This task is fulfilled by a tacker needle system according to patent claims 1-5. It uses at least two different tacker needles, whose anchoring element spacing is so different that the needles do not touch in the area of ​​the anchoring elements when alternately lined up in the magazine. Since, for example, only every second needle has the same width spacing between the anchoring elements, it is possible for the needle depth in the area of ​​the barbs to be twice as thick as in the area across the pipe. The difference in the varying spacing between the anchoring elements should therefore correspond at least to the width of the anchoring elements with increased needle thickness.

[0010] It is advantageous for the good cohesion of a magazine if the strength of the anchoring elements is not more than twice as strong as the strength of the area across the tube, at least if the magazine consists of two different needles. Drawings Fig. 1 shows an example of 2 needles with different distances between the two anchoring elements. Fig. 2 shows an example of a magazine with the different needles alternating. Fig. 3 shows an example of a complete magazine assembled from 2 individual magazines. 1 needle magazine 2, 3 tacker needles with different distances between the anchoring elements 4, 5, 6, 7 anchoring elements 8 Complete magazine 9, 10 individual magazines 11 Clipping 12 Pipe-spanning area 13, 14 Front and rear barbs 15, 16 Inner and outer barbs 17 Adhesive tape QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] 94104820.9

[0004]

Claims

[1] Tacker system with plastic needles, which can advantageously be pressed into the system insulation underneath a heating pipe using a setting tool and then fix the heating pipe in the specified position, characterized by that the needle magazine (1) consists of at least two different tacker needles (2, 3) which have a different distance between their respective anchoring elements (4, 5, 6, 7). [2] Stapler system according to claim 1 characterized by that the individual needles (2, 3) are assembled into a magazine (1) in such a way that the length of the needle magazine (1) is less than the length that results when you take the number of needles and multiply this by their greatest strength. [3] Stapler system according to one of the preceding claims characterized bythat the needle magazine (1) can be produced by alternately lining up the different tacker needles (2, 3) and then connecting the individual needles with an adhesive tape (17) or by welding the needles. Advantageously, such a magazine (1) can also be directly injection-molded as a magazine (1) with alternating tacker needles (2, 3), or, as a particularly advantageous embodiment, the entire magazine (8) is assembled from two or more individual magazines (9, 10), wherein a provided clipping (11) of the individual magazines is advantageous. [4] Stapler system according to one of the preceding claims characterized bythat the different tacker needles (2, 3) have a greater strength in the area of ​​the anchoring elements (4, 5, 6, 7) than in their pipe-spanning area (12), so that the holding force of the tacker needle can be increased by front and rear barbs (13, 14) or widened inner and outer barbs (15, 16) and nevertheless the pipe-spanning areas (12) of the needles remain directly adjacent to one another in the needle magazine (1). [5] Stapler system according to one of the preceding claims characterized by that the thickness of the pipe-spanning area (12) of the different tacker needles (2, 3) is identical in each case.

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