RU2141555C1 - Plastering darby - Google Patents

Abstract

FIELD: construction and finishing operations. SUBSTANCE: this relates to hand tools used for plastering of surfaces in buildings and structures. Darby has flat rectangular working part and inclined part conjugated with its upper edge. Inclined part is intended for loading and application of mortar. It has side edges in the form of triangular. Inclined part intended for loading and application of mortar is located at angle of approximately 135 deg. with respect to working part of tool. Free edge of inclined part is rounded with creation of upper handle. Lower edge of working part conjugates with part located at angle of approximately 45 deg. Rounded edge of this part creates lower handle. Side edges can be made with removable rubber slides. Darby can be made of sheet steel or aluminium. Aforesaid embodiment of plastering tool reduces inputs of material, time and labour. EFFECT: higher efficiency. 2 cl, 3 dwg

Description

 The present invention relates to the field of construction and finishing works, namely to hand tools for plastering walls and ceilings of buildings and structures.

 Known stucco one-half, containing a flat rectangular working part, conjugated with its upper edge, obliquely located part for loading and applying mortar with lateral edges in the shape of a square [1].

 Such a tool has a number of drawbacks: it is not convenient enough and does not allow the full use of the effort of both hands when smoothing and rubbing, it requires preliminary wetting of the surface, considerable time and labor for preliminary leveling of the applied solution, part of it is lost without use.

 The objective of the present invention is to eliminate these drawbacks, reducing the cost of material, time and labor.

The problem is solved in that the stucco one containing a flat rectangular working part, paired with its upper edge, an inclined part for loading and applying the solution with lateral edges in the shape of a square, the inclined part for loading and applying the solution is located at an angle of about 135 ^o to the working parts, its free edge is rounded with the formation of the upper handle. The lower edge of the working part is mated to a part located at an angle of about 45 ^° , the rounded edge of which forms the lower handle. Side edges can be made with removable skids made of rubber. The half-glass can be made of steel or aluminum sheet.

In FIG. 1 shows a General view of the device,
in FIG. 2 - embodiment of the device,
in FIG. 3 is another embodiment of the device without lateral edges.

A trickle consists of a working part 1 of a rectangle shape, at an angle of about 135 ^o to it is located part 2, the surface of which is mating with the upper edge of surface 1 of a cylindrical radius of not more than 2 cm, and the other edge is rounded and is the upper handle of the tool. The other handle is the rounded edge of part 3, its flat surface forms a dihedral angle of about 45 ^o with part 1 and its lower edge is also conjugated, but with a smaller radius, which is important when grouting corners. On both sides of part 1 there are screw clamps 4 for fixing a square 5 or a gutter for rubber runners or rails, allowing to evenly apply the solution and prevent losses. The inclined part in the region of the upper edge of the working part and the side edges form a “hopper for loading the solution” with the surface of the detachable wall.

 The presence of two handles, their location and shape allow you to use the effort of both hands.

 An inviscid solution is prepared for work (consistency of thick sour cream), there is enough moisture in it, so there is no need to pre-wet the surface.

 The tool can be made from a single piece of sheet metal - steel or aluminum, by cutting and bending the parts mentioned above, and the contact lines of parts 2, 3 and 5 can be welded for greater strength. Before work, rails are attached to the wall.

Work starts from the bottom - holding onto the lower handle, attach angles to the rail, apply the solution with the other hand to the inclined surface 2, vibrate, not acting strongly, but often, hitting the upper handle with the palm of your hand until the tool adheres firmly to the wall - appears "suction cup effect" to facilitate tool retention. If it holds, the hands are removed, reloaded with the solution, and vibrating with one hand, they act up with the other, constantly moving upward, preventing the solution from flowing to the level of the mating elements 1 and 2, if this place is covered with the surface of the fungus-shaped solution, the tool is reliably held by atmospheric pressure, therefore, loading is possible with two hands directly from the bucket. Not reaching the top edge of the wall by 10 cm, the flow of the solution is stopped, move upwards to the stop, tilt the upper edge of the tool towards itself, without tearing off edge 1. The supply of solutions is carried out on the inclined part of the tool facing the wall, limited by the side edges, which allows applying lossless solution. Temporarily removed from the wall, the tool is turned 180 ^o , applied to the wall, vibrating, pressing and rubbing. After that, the tool is returned to the lower edge of the wall, and, moving along the rails up and down, smoothen smudges, without waiting for the solution to set, as when finishing in a previously known manner. To be able to work without turning the tool over, part 2 can be hinged by fastening it with a piano loop to part 1, but it also takes a heck to fix it before grouting, which complicates the design. No less successful is working with a similar tool having only one support square or trough. Work is much more productive than with a regular half-trick, even without supporting and guiding elements.

 To work without the use of rails using clamps 4 on one or both sides, runners 6 are attached - rubber strips cut from a car camera or their sponge rubber, foam rubber. Their edge should protrude above the surface 1 no more than 1 - 2 cm. When hitting bumps during operation, such runners are easily deformed, exclude useless waste of the solution and improve the "suction cup effect" and facilitate holding the tool not only when decorating walls, but also flow.

In FIG. 2 shows another possible embodiment of the present invention. The working part of the grater 1 forms with an inclined part 2 a dihedral angle of 45 ^o . It used a screw with a “wing” type nut for attaching to the rounded ends of 4 sidewalls 5 (on one or both sides), which are in the form of book covers with horizontal slots. The lower inclined part 6 is almost parallel to part 2, part 5 is also pressed to its rounded ends, into which the runners - strips of rubber are pre-inserted, their extension below surface 1 is set, re-secured with screws and nuts.

 The solution is applied similarly. Before the final grouting, the sidewalls 5 and fasteners are removed, a plastic bottle of water is inserted into the rounded part 4, closed by a cork, through which a tube is inserted, one end of which reaches the bottom and the other end protrudes and is bent to surface 1. If necessary, the surface to be smoothed in places can be moistened by pressing the wall of the vessel with your thumb through the slot made in part 4.

In FIG. 3 shows the simplest option for working without sidewalls and guide runners. The corners of the upper inclined part 2 are bent to the plane 1. But its edges form an angle of 5 ^o with it. In the rounded handle 3, it is possible to install a plastic vessel with water and squeeze water out of it with your finger through the cutout in this handle. For convenience and economy of material, the length of the handles 3 and 5 are made shorter than the width of the working part 1.

 At the final grout in all the above options, the stock of the solution (to be added during grouting) is placed on the upper surface of the inclined part 4. To cut off the excess solution, the tool is tilted without tearing and moved up, the cut off excess solution is not lost, but falls onto the surface of the part 4.

 To work with emphasis on smears, hollow handles should be inserted with rods or pipe lengths so that their ends protrude from the handles, and to reduce friction, they should be fitted with nylon bushings or rollers on bearings. To facilitate the retention of a half-inch, it is convenient to work with beacons from a square or channel welded into the frame - with hooks with frames with grooves in the middle at least 1 cm deep, whose axles are attached to the ends of the rod perpendicular to the handle using nuts.

 As described above, the solution is applied to the surface of the wall, but sometimes after the first penetration due to upward movement with vibration, they form behind the tool - “bumps” appear. After applying the solution almost to the ceiling, the solution is stopped, the lower handle is removed from the wall, while it will turn around the upper rod with rollers, lowering the tool down (the lower part of the tool) is pressed against the wall and now it moves up without vibration, and if necessary, the movement is repeated.

 To ensure an almost perfectly flat surface of the detachable wall, the length of the beacon frame should be 3-5 cm shorter than the ceiling height, the upper horizontal part should be provided with screws with wide heads or knobs, and for quick installation in the same plane and to support the frame against the wall, Attach squares to its ends or stretch horizontal threads located in one vertical plane. The threads should be pulled at a distance from the floor and ceiling at a distance of about 10 cm and at a distance from the wall 1-2 cm greater than the thickness of the beacon frame, they do not interfere with the work.

Sources of information
1. Patent of England 1149874, 1969.

Claims (3)

1. A stucco one containing a flat rectangular working part, conjugated with its upper edge, an inclined part for loading and applying mortar with lateral edges in the shape of a square, characterized in that the inclined part for loading and applying mortar is located at an angle of about 135 ^o to the working part, while its free edge is rounded with the formation of the upper handle, and the lower edge of the working part is mated with a part located at an angle of about 45 ^o , the rounded edge of which forms the lower handle.  2. The stucco one according to claim 1, characterized in that the side edges are made with removable runners made of rubber.  3. The stucco one according to claim 1, characterized in that it is made of a sheet of steel or aluminum.

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