FI118903B - snow Planer - Google Patents

Description

.. .. 1 1 8903

LUMIHOYLA

The present invention relates to a snowplate for removing snow from a sloping surface, in particular from the roof of a building 5, which comprises: - a substantially U-shaped frame with a web and two flanges; and - a strip connected to the blade to dissolve the snow when moving the snow slider.

In many areas, snow accumulates on the roofs of buildings so much that it is necessary to remove snow in winter to avoid overloading the roofs. Snow can be removed by a variety of tools and methods. One way is to go to the roof and remove the snow with a shovel or a bump. However, in this case, the risk of falling is high and the roof roofing material may break. Thus, especially on the sloping roofs of relatively low buildings, snow is removed from below, standing on the ground, for which various devices have also been developed.

US Patent No. 5943796 discloses a snow removal device on a roof or similar surface. The blade included • · · • *: S is a fitted strip to allow snow to slide down from the ceiling when using the unit. The blade is attached to a U-shaped body piece «· • · * -. *, The web of which is supported by fastening elements for the shaft or the like. In addition, the blade is pivotally mounted at its leading edge 30 to the body member, whereby the device can be operated

• M

either by pushing or pulling the handle.

··· • · * • · ·

The body and the blade are made of sheet metal · »«.:. by bending. This creates a heavy weight, which increases • · · l. 35 limit the maximum arm length.

• · · * * In addition, additional stiffeners are required for the body block, which further increases the weight. Despite the additional stiffeners, the flanges of the frame 2 118903 are unsupported, thus adversely affecting the shape of the device as the device is used. Hinging the blade on the flanges adds to life. Further, the geometry of the device changes between different working modes, which increases the stress on the device. 5 The machine also requires a lot of storage space and, for example, changing the strip requires the use of tools.

The object of the invention is to provide a new type of snowplane which is considerably lighter but more robust and easier to use. Characteristic features of the present invention will be apparent from the appended claims. According to the invention, the blade is fitted to the frame structure in a new and surprising way. The fitting utilizes shape locking and, in particular, the elastic properties of the body member. The frame structure 15 is adapted to provide a clear tension on the snowboard, which holds the various components in place. At the same time, the snowplane becomes stiffer than before without additional stiffeners. Even when used, the shape of the snowplough remains unchanged. In addition, the snowplane operates as planned, regardless of the application, and the snowplane can be adjusted and maintained without tools. When needed, ···, the snow plow can be disassembled for easy transport and storage.

The invention will now be described in detail with reference to the accompanying drawings illustrating some embodiments of the invention, in which: • ♦ • · · ·

Fig. 1 is a rear view of a snowplane according to the invention, viewed from above, Fig. 2a is a top view of a snowplate: 1: Fig. 2b snow-stripped snow in accordance with the invention • · ·. * ··. viewed from below the planer body, · ·; Fig. 3a shows the end portion of the snow blade according to the invention, viewed from above, · · * 35 and part of the flange, 3 118903

Fig. 3b is a side view of the attachment point of the snow-planer flange of the invention to the blade.

Fig. 3c shows one way of using the snowplane according to the invention, Fig. 4a shows a side view of the fixing means for the snowplane according to the invention,

Figure 4b shows parts of the fastening members of Figure 4a inserted into the shaft,

Figure 4c shows the sleeves of the sleeve door assembly 10 of the fastening members of Figure 4a.

Figure 1 shows a snowplane according to the invention for removing snow from a sloping surface, in particular a roof of a building. The snowplate comprises a substantially U-shaped body 15, which includes a web 11 and two flanges 12. The web 11 is further provided with fastening means 13 for the arm 14. In addition, the snowplough includes a blade 15 fitted to the flanges 12 for cutting the snow together with the flanges 12. A strip 16 is also connected to the blade 15 to dissolve the snow when moving the snow blower 20 from the handle 14. In Fig. 1, only part of the handle 14 and the strip 4 · 4 · 16 is shown.

• · ·· 1 2 »• ·

Figure 3c shows one way of using the · · ·. '* Of the invention! lumihöylää. Here a person stands on the ground and pushes a snowboard * · · • t ** ·, * 25 eaves per brush. The blade, together with the flanges, bites • · * into the snow and slides off the snow on the roof • · 2 strips down the roof. Depending on the thickness of the snow, the same point is repeatedly shaved several times. However, the body web · · · prevents the snowboard from being cut too deep. In this case, the force required by * · "* 30 remains reasonable and is mainly directed at pushing the ij *: planer instead of supporting or guiding it.

In practice, the stem and strip are several meters long.

···, Another way is to pull the snowboard from the eaves to the brush on the roof · Standing or sitting (not shown). In both ways, the snowballs • ·· 35 slide over the strip down from the roof.

4, 118903

The snowboard according to the invention can easily be used in the aforementioned ways, in particular due to the lightness and stiffness of the snowboard. According to the invention, the flanges 12 are arranged to be at least partially resilient to fit the blade 15 into the body member 10 under tension of the bent flanges 12. In Figure 1, both flanges 12 are bent nearly 90 ° relative to their resting position. The body 10 in the dormant state is shown in Figures 2a and 2b. The strong elastic bending on the flanges and on the entire frame structure provides significant tension 10 which holds the blade in the flanges and in any other shape of the frame structure without external loading.

In the embodiments shown, the flanges 12 are arranged to extend through the blade 15. The bending of the flanges is then easy and a wide blade can be used. The width direction of the blade 15 is shown by the double-headed arrow in Figure 3a. Alternatively, the blade can be adapted to extend through the flanges, whereby the blade width is clearly smaller than the length of the frame structure. The longitudinal direction of the body member 10 is shown by the double-headed arrow in Figure 2a.

20 In both cases, a form ... ... lock is formed between the blade and the flange, which is securely locked by the tension of the flanges.

* ·

In other words, the blade stays closed without separate locking and * ·. the blade can be removed without tools. Figure 3b shows the blade * · · t · ·. **! 15 fixed to flange 12.

* · F · · "*, * 25 • t *

Fig. 3a shows the end portion of the blade 15 as well as a portion of the strip 16 * · * · * 'and a blade profile 17 disposed thereon.

The design corresponding to the aperture 18 is arranged in a portion extending through the blade 15 • * * ··· * 30 of the flange 12 to provide a form lock. The design of the flange: Ti and the recesses 19 in the flange 12 are particularly evident: "* · in Figures 2a, 2b and 3a, 3b, In the embodiment shown, the flange and,» »·. the recesses made therein are dimensioned so that the blade opening • ·; the first edge is fitted to one of the recesses in either flange.

• · * 35 Preferably, this is done on both flanges at the same time. When the blade is in the first recesses, the blade is rotated to its final position 5,118,903 and finally the blade is moved toward the second recesses. In this case, after insertion of the flange 12 into the opening 18, the tensioned flange 12 can move slightly outward. Thus, the flange is effectively locked to the blade, whereby the attachment is free of play and secure. In Fig. 3a, the internal dimension of the opening 18 corresponds substantially to the distance between the recesses 19 of the flange 12. Correspondingly, the dimension defined by the end shapes 18 'substantially corresponds to the dimension between one outer edge of the flange 12 and the cavity 10 of the opposite edge thereof, whereby the shape locking acts as described above. Due to the proper sizing and shaping and especially the tension on the flanges, the blade stays in place. In addition, the loading direction of the snowplane is adjusted such that the blade tends to move towards the aforementioned second cavities.

15

When removing snow, the frame web prevents the snowplough from biting too deep. Correspondingly, the portion of the flange 12 extending through the blade 15 has roundings 20 to form functional footwear. In practice, only the flange tips touch the 20 roofing material. This prevents the blade from hitting the pavement and makes the snowplane easy to use.

• · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · This avoids discontinuities in the structure and simplifies manufacturing. The material is • · · * · “* made of plastic that is easy to work with. However, current plastics are • · * ··· * durable and the elastic properties of the plastic material can be utilized in accordance with the invention. Sufficient tension • * · * · * · * is achieved by bending alone, but according to the invention, the stiffness is further improved by folding. Specifically, · * · *: two stiffened flange portions 21, ··· "\ m · with a bending angle differing from a right angle are provided in the sheet body to stiffen the web 11. more preferably 60 to 70 ° The flange portions provide extra rigidity to the body • 35, especially against rotation.

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According to the invention, the fastening means 13 include a sleeve assembly 22 arranged around the shaft 14, which is adapted to be clamped to the oblique flange portions 21. Furthermore, by suitable dimensioning, the sleeve assembly can tension the flange portions, thereby further increasing the stiffness of the body 5. At the same time, rotation of the sleeve assembly and thus of the shaft is avoided, which maintains the good precision of the snowboard. Figure 4a illustrates in more detail the sleeve assembly 22 of the invention, which is clamped to the flange portions. Here, the sleeve assembly 22 comprises three sleeves 24, 25, and 26, 10, the junctions of which are bevelled at an angle corresponding to the flange portions. Further, the first sleeve 24 is fastened here by a screw 27 to the arm 14 to be non-rotatable. When mounting the sleeve assembly 22, the middle sleeve 25 is inserted between the flange portions and the arm 14 provided with a non-rotatable sleeve 24 is inserted through the holes in the middle sleeve 25 and the flange portions. Preferably, the middle sleeve is slightly shorter than the distance between the flange portions. Finally, the outermost third sleeve 26 is secured to the bolt 28 inside the shaft 14 (Figure 4b). The nut 29 corresponding to the bolt 28 is mounted on the thumb wheel 30. The bolt 28 is respectively supported by a plate-shaped connecting piece 32 for the screw. ···. 27 such that the bolt 28 is non-rotatable. In this case, the finger wheel 30 * · ...: by rotating the arm 14 can be tightened to the flange parts which • ·. ... at the same time tense. In practice, the standard pipe arm only needs to be drilled • * · and the sleeve assembly allows the pipe arm to be • · · ** V 25 secured using a single bolt. At the same time, the tubular arm can be removed and turned in the opposite direction to the body piece • m • · ** for example when changing the working mode. Usually, the tubular arm removal is unnecessary as both the body piece and blade are symmetrical and in its longitudinal and wide axis.

• · * ·; · * 30 In this case, no matter how you work and how you plan to snowboard * .i! operation remains essentially unchanged.

··· • · • 9 ···. ···. In addition to the body, the blade is also preferably a plastic material · ·. ·. * lia, which makes the snowboard light. To prevent abrasion of the plastic blade 35, a blade profile 17 118903 is provided on the opposite side of the shank arm 17. With suitable sizing, the blade profile stays in place without separate fasteners. Further, the entire strip extending between the flanges 5 is positioned around the blade and secured with the aforementioned blade profile. Hereby, changing the strip is easy and moving the strip fold can easily select the effective strip length. For example, the effective 10 length of a five meter long strip can be adjusted from almost five meters to two and a half meters depending on how much the strip is doubled. The blade profile also has a third function. According to the invention, the length of the blade profile substantially corresponds to the distance between the flanges when the blade is attached to the flanges (Figure 1). 15 In this case, the blade profile prevents the flanges from moving inwardly and thus detaching the blade contour lock. If the snowplane is used without a blade profile, the strip is attached to the blade, for example, by gluing or tape.

20 The strip is some suitable material with which the snow slides well. In addition, the material must be sufficiently flexible and • · '** resistant to frost. • · is used to minimize the need for power. preferably as light a strip as possible. To ensure trouble-free operation, the blade 15 has a weight of 31 at the far end of the strip 16 • ·: * Y 25 (Figure 3c). This allows the strip to remain straight and * φ · * "· * tight despite the wind. The weight can be fixed or • · ***** detachable, such as a flexible rubber band. Removable weight is advantageous because it can be removed with calm air φ · · * · Ί · * when using a snowmobile.

φ φ φ 30 Φ

One of the snow planers tested according to the invention is about 500 mm wide: *** and the distance between the web and the blade is about 200 mm. The frame material and • blade material has a thickness of 3 mm and material is φ · φ y. polycarbonate. This plastic has a wide operating temperature range of # ♦ # 35 and is impact and weather resistant. The machinability of the polycarbonate is good and the edging succeeds even when cold. The weight of the tested β 118903 snowplane is less than one kilogram. This snowmobile was tested on a six meter hollow fiberglass shaft and a seven meter long strip, with very good results despite the partially frozen snow.

5

The snowboard according to the invention is light and durable and easy to use even on long stalks. In addition, the snowboarding properties can be easily changed even with air tools. Despite efficient operation, damage to the roofing material is avoided and working from the ground 10 is safe.

• • • • • • • • • • • • • • · · · · · · · · · · · · · · · · · · · ··· ♦ · • * * «« «« · · · · · · · · ♦ ♦ ♦ ♦ • ·· f ·

Claims (12)

A snowplate / for removing snow from a sloping surface, in particular a roof of a building, comprising: - a substantially U-shaped body (10) having a web (11) and two flanges (12), - a web (11) fastening means (13) for the shaft (14), 10. a blade (15) fitted to the flanges (12) for cutting snow together with the flanges (12), and - a strip (16) connected to the blade (15) for dissolving snow when moving the snow shank (14). , characterized in that the flanges (12) are arranged at least portions-15 protected to resiliently fit the blade (15) to the body (10) by the tension of the bent flanges (12). Snowplane according to Claim 1, characterized in that the flanges (12) are arranged to extend through the blade (15). 20, ···. Snowboard according to Claim 1 or 2, characterized in that the blade (15), which is longer in width, has both ends. is an aperture (18) corresponding to a design provided in a portion extending through the flange (15) of the flange (15) to provide a form locking mechanism. Snowplane according to one of Claims 1 to 3, characterized in that the part of the flange (12) extending through the blade (15) has rounding (20) of functional shoes. forming • · * ··· * 30 sex. ··· • * · • · t * Snowplane according to any one of claims 1 to 4,. characterized in that the frame body (10) is a single plate body, * · ♦; the web (11) and the flanges (12) being formed therefrom. • ·· 35 118903 Snowplate according to Claim 5, characterized in that, in order to stiffen the web (11), two folded flange portions (21) of the frame body (10) having a bending angle different from a right angle are provided in the plate body. 5 Snowplate according to Claim 6, characterized in that the fastening means (13) comprise a sleeve assembly (22) arranged around the shaft (14) and adapted to be clamped on the flange parts (21). Snowboard according to one of Claims 1 to 7, characterized in that both the body (10) and the blade (15) are symmetrical with respect to their respective longitudinal and width axes. Snowboard according to one of Claims 1 to 8, characterized in that both the body (10) and the blade (15) are made of plastic material. 9 118903 Snowplate according to one of Claims 1 to 9, characterized in that the entire strip (16) extends around the blades (12) and extends around the blade (15) and the arm (14) of the body piece (10). ) on the opposite side is provided a 0 m blade profile (17) covering both the blade (15) and the strip (16), t 25 · 1. Snowplane according to Claim 10, characterized in that the length of the blade profile (17) corresponds substantially to the distance between the flanges • · *** (12), the blade (15) being on the flanges (12). attached. Snowboard according to one of Claims 1 to 11, characterized in that the blade (15) in the outermost strip (16): the end has a weight (31). «* · · ♦ 118 118 118 118 90 90 90 90 90 90 90