SU59358A1 - Ski tester - Google Patents

Description

In order to check the quality of the skis, both at the time of manufacture and at the time of manufacture, the device is simple in its design and is used to place the test skis, the base of which is made in the form of parallel bars suspended by means of elastic t apparatus. Thus, by checking the ready-made skis on the apparatus (regardless of their design), it means in mind that their quality is improved by indicating the most advantageous weighing deflection at. marking, and by means of testing on the ski apparatus, during its production, achieve maximum accuracy and, consequently, “of the highest quality, without increasing its cost.

In FIG. 1 depicts a top view of the apparatus; FIG. 2 - a section on AB f. one; FIG. 3, 4 and 5 - details of the device.

The main frames of the apparatus consist of two lower and two upper longitudinal bars connected between themselves in bar by bar 3. The lower bars of strength are connected in the middle with bars 3. The cross section of the bars is taken, approximately 2.5 x 2.5 cm

for the reasons that the device is portable and is attached with screws to a bench or a bed specially made for this purpose. For devices of a stationary type, the bars should be made more durable, so that when the load on the center is 36-40 kg, the deflection does not work, otherwise the apparatus will show inaccurately. The length of the longitudinal bars should be equal to the maximum length of the entire ski (counting and nasal bend). The upper and lower bars of frame 1 are connected by paired racks 4 and in the place of the greatest load — rack 2. Paired racks 4 are installed along the entire length of the apparatus at a distance of about 7 cm one pair from the other between the centers and with the intervals between paired racks in which the bars are inserted. 6. At both ends of the bar: 6 an elastic ha is attached (for example, a rubber band), which is attached to the hooks 5, mounted on both upper frames of frame 1 in the center of paired struts 4, from the inside of the apparatus. Bars 6, suspended in a strict order on one level, form an elastic base (intended to create a kind of loose snow), on which it is laid for

test the ski and press the racterOipKoft 7. Last it presses the ski 9 in such a way that the pressure on the ski is equal to the skier's half weight (about 35 kg). For different skier weights there must be different struts. To facilitate the calculation of the spacers on the rack 2, the scale of stretching of the rubber tape under a certain load is broken; thus, by multiplying the scale data by the number of rails 6 that came along the entire length of the sliding surface of the test ski 9, the struts 7 can be adapted for any load.

The process of testing skis with the help of a danio apparatus is based on the author's premise that follows. As is known, the greatest slip has a horizontal plane of the ski and, in order to achieve such a youth of the ski during the slide, the ski is curved (weight deflection). Essentially, the correct deflection and the correct reduction of the thickness of the ski from the cargo area to the nasal bend and heel is the most responsible and difficult task in the manufacture of the ski. If the manufactured ski 9 is put on two legs with its ends, then a very small load will be required for the weight deflection to take a horizontal position, and the ski without a weight deflection is bent (in those cases when the load, from top to bottom, does not meet with any opposition). During the ski slip on loose snow, the snow resistance from below puts pressure on the ski to the same extent along the entire length of the sliding surface of the ski 9; the same resistance (pressure) from below ski 9 meets when sliding on any base. It should be noted that, when sliding on an elastic base, had a horizontal sliding surface, the skier’s half weight on the ski & ski platform 9 needs to be evenly distributed over the entire length of the ski, which constitutes the difficulty of constructive calculations of the ski, but it can be determined on this test apparatus.

Thus, in order to make a ski with maximum accuracy, having determined the modulus of elasticity of a given wood (with some lags) the most advantageous weight deflection, you should first bend the ski bar or coarsely trimmed ski, after which you can further check the ski lining and attach the ski , respecting the width and correctness of the sliding surface (more precisely, pristragivat) until the ski 9, laid on the slats 6 and getting the load by pressing the strut 7 on the cargo area in size e 35-36 kg will not have a horizontal position, i.e. until the effect of pressure on the ski from above is equal to noi the entire length of the sliding surface to resist the stretching of rubber from below.

When testing a finished ski, you can only determine the correctness or imperfections of the weight deflection and establish other defects that cannot be corrected anymore. The correct positioning of the rails 6 is determined by a ruler, which is superimposed on their ends.

The device is intended for use in ski factories, sports shops, ski stations, physical education clubs, etc.

The subject matter of the invention.

An apparatus for testing skis, differing in the fact that, in order to determine the efforts at different sites along the length of the ski, the base for the ski is made in the form of parallel bars 6 suspended by means of elastic t, e.g., rubber bands, etc. ., to frames 1.

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