RU218272U1 - Roof snow scraper - Google Patents

Abstract

The utility model relates to hand tools for clearing snow from pitched roofs of buildings. The scraper is a U-shaped metal frame made of a hard material, for example, metal or other polymeric material, in which the cutting edge (1) of the lower part (2) has a wedge shape, the tip of which is directed towards the movement of the device, thus , the front point of the cut is located on the edge of the wedge-shaped lower part of the frame. The side parts (3) of the frame are made in the form of a rectangular trapezoid, the acute angle of which is located below the front (cutting) side of the frame. The cutting edge (4) of the side parts (3) of the frame is located at an angle to the cut line, which reduces the applied forces when pushing the frame into the snow mass, in addition, to the outer side of the side parts (3) of the frame, skids are rigidly attached (for example, by bolting) (11) in the form of plates of hard material (plastic, polycarbonate, stainless steel), so that the lower edge (12) of the skids (11) creates a gap (from 10 mm) between the lower (2) part of the frame and the roof, on which the scraper falls. From above, the side parts (3) of the frame are interconnected by means of a bar (5), which does not allow the side parts (3) to diverge in different directions, in addition, a check valve (13) made of an elastic material is hinged to the bar (5), made in in the form of a plate or lattice, the left and right edges of which abut against the side parts (3) of the frame, while the check valve (13) is configured to deviate towards the slope of the snow layer from the roof. On the surface of the lower part (2) of the frame, in the middle, there is a shell (6), into which one end of the handle (7) is inserted and fixed, on which a vertical knife (8) is fixed, the cutting edge (9) of which is also located at an angle to the cut line, to facilitate cutting in two a snow block rolling down from the roof. Also, on the back side of the lower part of the frame, with the help of a clamping bar, a sliding flexible material (10) is attached, which facilitates the snow from the roof. 3 ill.

Description

The utility model relates to hand tools for clearing snow from pitched roofs of buildings.

A portable tool is known for removing snow from roofs while standing on the ground, equipped with an elongated handle for driving a U-shaped body up the roof while forming a U-shaped channel in the snow and a rotary blade moving in a plane, usually perpendicular to the roof, when moving tool down to the edge of the roof for plowing snow in the previously formed U-shaped channel of the roof (US 4249767 (A) - 1981-02-10).

Known roofing razor for cleaning snow, consisting of a cutting, U-shaped, frame attached to an aluminum handle, consisting of 4 separate, connected by latches, sections. In this case, the cutting bar is located on top of the frame, under which a flexible sliding material is fixed, twisted into a roll, deployable and fastened with an elastic cord, to the third section of the handle ("https://roofrazor.com/product/roof-razor-dvnamo-roof- rack/).

The closest analogue is a snowplow, which includes a frame in the form of a rectangular aluminum knife mounted on a sectional, prefabricated handle, a roll with flexible sliding material (https://www.polarmade.com/en-us/products/snowpeeler-premium/).

The disadvantages of the known devices is that the cutting part of the frame is made straight, which can make it difficult for the knife to penetrate into a dense layer of snow. In addition, there is the problem of packed snow, which, after a temperature difference, can have a very dense and hard (ice) structure; using well-known devices, when cleaning the roof from such snow, there is a risk that the snow will come off in a solid, heavy layer (since the devices do not contain elements that eliminate this problem), thereby it can fall on a person, causing damage to his health.

The closest analogue is a scraper for removing snow from the roof, which is a U-shaped metal frame, the lower and side parts of which are equipped with a cutting edge, while the side parts of the frame are interconnected by means of a strap, a flexible material is attached to the rear side of the lower part of the frame, and on the surface of the lower part of the frame there is a tulle, into which one end of the rod is inserted, and the cutting edge of the lower part has a wedge-shaped shape, and its side parts are made in the form of a rectangular trapezoid, the acute angle of which is located below the front side of the frame, thus, the cutting edge of the side parts frame is located at an angle to the cutting line, in addition, the rod is made telescopic with a vertical knife fixed on it, located behind the frame (RU 206496, IPC E04D 13/10; E01H 5/02, published: 09/14/2021, Bull. No. 26).

The disadvantage of the closest analogue is that the wedge-shaped lower part of the frame, when moving, completely lies on the roof, which may have protruding elements (nail heads, self-tapping screws, relief protrusions of metal tiles, etc.) that will prevent the scraper from moving up and down. In addition, the design does not allow efficient removal of snow from flat roofs with a slope angle of 10-25°, because at this angle of inclination, the snow will not come off when the scraper passes.

The task facing the author is to improve the scraper device for removing snow from the roof, which will make it possible to more effectively clean the roof of buildings from snow with less effort.

The problem is solved due to the essence of the device of the inventive scraper (snow cutter), which consists in the use of skids attached to the sides of the frame, in the form of plates of hard material creating a gap between the lower part of the frame and the roof along which the scraper moves, which will facilitate the sliding of the frame and prevent the cutting edge from colliding with protruding elements on the roof, as well as thanks to a non-return valve made of elastic material, hinged to the top bar.

The scraper is a U-shaped frame made of a hard material, for example, metal or other polymeric material, in which the cutting edge (1) of the lower part (2) is wedge-shaped, the tip of which is directed towards the movement of the device, thus the front point of the cut is located on the edge of the wedge-shaped lower part of the frame. The side parts (3) of the frame are made in the form of a rectangular trapezoid, the acute angle of which is located below the front (cutting) side of the frame. The cutting edge (4) of the side parts (3) of the frame is located at an angle to the cut line, which reduces the applied forces when pushing the frame into the snow mass, in addition, to the outer side of the side parts (3) of the frame, skids are rigidly attached (for example, by bolting) (11) in the form of plates made of hard material (plastic, polycarbonate, stainless steel), so that the lower edge (12) of the skids (11) creates a gap (from 10 mm) between the lower (2) part of the frame and the roof on which lies scraper. From above, the side parts (3) of the frame are interconnected by means of a bar (5), which does not allow the side parts (3) to diverge in different directions, in addition, a check valve (13) made of an elastic material is hinged to the bar (5). in the form of a plate or lattice, the left and right edges of which abut against the side parts (3) of the frame, while the non-return valve (13) is made with the possibility of deflection towards the slope of the snow layer from the roof. On the surface of the lower part (2) of the frame, in the middle, there is a tulle (6), into which one end of the handle (7) is inserted and fixed, which is a hollow tube in the form of cylindrical rods, made of metal or other solid material. A vertical knife (8) is fixed on the handle (7), the cutting edge (9) of which is also located at an angle to the cutting line, to facilitate cutting in two a snow block rolling down from the roof. Also, on the back side of the lower part of the frame, with the help of a clamping bar, a sliding flexible material (10) is attached, which facilitates the snow from the roof.

Figure 1 shows a General view of the scraper to remove snow from the roof.

Figure 2 shows a specific example of a scraper frame with a lattice valve and skids made of polymer.

Figure 3 shows a specific example of a scraper frame with a plate valve and skids made of polymer.

How the device works.

To clean the pitched roof of the house from snow, the scraper cutting frame is installed at the lower edge of the roof and, from the ground, is pushed up towards the top of the roof using the handle (7). When the cutting frame moves, the front point of the cut will start at the tip of the cutting (wedge-shaped) edge (1) of the lower part (2) of the frame, this will create a load concentrator on the snow layer and easily pass the frame deep into, even through the thickness of dense, packed snow, when In this case, the skids (11) create a gap between the lower (2) part of the frame and the roof along which the scraper moves, which facilitates the sliding of the frame and prevents the cutting edge (1) from colliding with protruding elements on the roof. The side parts (3) of the frame, the cutting edges (4) of which are located at an angle to the cut line, also contribute to the easy cutting of the snow layer and the passage of the frame upwards. As the frame moves up the roof (fig.2a), the trimmed layer of snow is additionally cut in two (fig.26, 2c) by a vertical knife (8) located behind the frame, while the separated halves of the layer change the trajectory of movement, rolling into opposite sides (in Fig.2 d shown by arrows), moving away from the original line of fall, on which the user stands. The descent of cut snow on the roof is facilitated by a flexible, sliding material (10) attached to the back of the frame.

When removing snow from flat roofs (with a slope angle of 10-25°), the device uses a check valve (13), which freely deviates under the pressure of a rolling snow block cut out by a scraper, and when the scraper moves in the opposite direction, the valve (13) rests against side parts (3) of the frame and pulls the cut block of snow over the sliding material (10).

Due to the shape of the cutting edges (1; 4), the scraper can effortlessly cut not only packed, but also hard, icy snow layers. The knife (8) installed behind the frame, on the handle (7), contributes to greater efficiency in cutting snow and ensures safety for the user of the device when cleaning the roof from packed and icy snow. The hard material skids (11) create a gap between the roof surface and the lower (2) part of the frame, preventing the scraper from hitting the protruding roofing elements. The valve (13) allows you to effectively remove snow from flat roofs.

Thus, the task assigned to the author is completed.

Claims (1)

A scraper for removing snow from the roof, which is a U-shaped frame made of solid material, the lower and side parts of which are equipped with a cutting edge, while the side parts of the frame are interconnected by means of a strap, a flexible material is attached to the back side of the lower part of the frame, and on the surface of the lower part of the frame there is a tulle, into which one end of the handle is inserted, and the cutting edge of the lower part has a wedge-shaped shape, and its side parts are made in the form of a rectangular trapezoid, the acute angle of which is located below the front side of the frame, thus, the cutting edge of the side parts of the frame located at an angle to the cutting line, in addition, the rod is made telescopic with a vertical knife fixed on it, located behind the frame, characterized in that skids in the form of plates of hard material are rigidly attached to the outer side of the side parts of the frame, in addition, to the bar a check valve made of elastic material is pivotally attached, the left and right edges of which abut against the side parts of the frame, while the check valve is configured to deflect towards the slope of the snow layer from the roof.

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