RU2572449C1 - Stool - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: stool comprises a seat connected to flat legs which width is greater than their thickness. And the legs have a vertical or inclined support part and a horizontal section, for example, an L-shaped on top, and two vertical cutouts are made on it at an angle to the plane of the leg, the width of which is not less than the thickness of the leg and the depth equal to half the width of the leg on the horizontal section, one cutout is directed downwards and is located above the support part of the leg or closer to the middle of the horizontal section, and on its opposite end there is a second cutout directed upwards, and the horizontal sections of the legs form a prism with finger joint by the pairwise mating of the upper cutouts with the lower ones at the neighbouring legs so that the mating cutouts are inserted one into the other against stop.

EFFECT: simplification of the design with increased strength.

3 cl, 5 dwg

Description

The present invention relates to the production of kitchen and garden furniture and can be used in everyday life, as well as for outdoor recreation.

Of the patented designs, a stool is known, which consists of a seat associated with legs mounted on axles fixed in a rectangular crosspiece located in the middle of the stool. The legs are mounted with the possibility of rotation to the limit stops (US 1896446 A, publ. 7.02.33).

The disadvantages of this technical solution are the complications consisting, in addition to the seat and legs, of additional parts and structural elements: a rectangular cross, fixed axes, restrictive stops, etc. and, as a result, an increase in material consumption, mass, complication of the manufacturing process and assembly.

Of the later patents granted, a stool is known, which consists of a seat associated with three crossed legs mounted on studs-axles forming a cross-tee located in the middle of the stool. The legs are mounted on studs with the possibility of rotation up to the fixing grooves made in the legs, and securing them with wing nuts (US 2358059 A, publ. 12.09.44).

This design is complicated by a spider, wing nuts, legs of complex shape and profile with the execution of fixing grooves in them, and for reliable fixing of the legs it is necessary to unscrew and tighten the wing nuts, and it takes physical effort and time to tighten the nuts.

Closest to the claimed technical solution is a stool (RU No. 2057474, publ. 04/10/1996), consisting of a seat and four legs connected to a polyhedral stiffener located in the middle of the stool with nails in which the legs cross in pairs in parallel planes passing through the edges of the square stiffener.

The disadvantages of this technical solution is the complexity of the design, which consists in the use of a stiffening rod and many nails for satisfactorily fixing the legs on the rod, the node for securing the legs is cumbersome, increasing material consumption and costs. Due to the nail joints of the legs with the rod, as well as their pairwise arrangement in parallel planes, articulated parallelograms are formed, and the stiffness of the stool is ensured by the rigidity of the nail joints related to the articulated joints, which cannot be recognized as sufficiently reliable. The adaptation to gender irregularities described in the description as a positive effect is also a significant drawback consisting in the insufficient stiffness of the stool. Mobility in nail joints during intensive use will inevitably lead to an increase in their loosening and rapid breakdown.

The task to which the invention is directed is to simplify the design and increase the stiffness of the stool.

This problem is solved due to the fact that the claimed stool containing a seat associated with flat legs (width greater than thickness) has the following differences: legs, for example, sawn in a closed circuit from plywood, have a vertical or inclined support part and a horizontal section, for example , L-shaped from above, and on it are made at an angle to the plane of the leg two vertical cuts with a width of at least the thickness of the legs and a depth equal to half the width of the legs in a horizontal section, one cut is directed downward and is located above the leg section or closer to the middle of the horizontal section, and on its opposite end there is a second cutout, directed upwards, and the horizontal sections of the legs form a prism with a lock in connection by pairing the upper cutouts with the lower cutouts of adjacent legs, so that the mating cutouts are inserted one into another all the way.

The stool can be assembled from legs with a horizontal section in the form of a continuous step in the middle part between the descending support section and the ascending leg section connected with the seat.

The stool can be assembled from legs with a horizontal section in the form of a protrusion in the middle part.

The technical result provided by the given set of features is to simplify the design and increase the stiffness of the stool. The same legs are interconnected without intermediate and fasteners, which simplifies the stool. The connection of the legs when closing the upper cutouts with the lower at the adjacent legs with the formation of a rigid prism with horizontal sections of the legs increases the stiffness of the stool. The stiffness of the stool is increased, since the prism formed by the castle connection of the horizontal sections of the legs gives sufficient rigidity to the frame formed from the legs.

As a result, the assembly process is simplified, which in this case does not require tools or any special skills. The assembly time is minimal: a matter of seconds (you need to connect the legs together, inserting the lower cutouts into the upper all the way and put the seat on top). The seat does not carry power loads (it rests on the legs forming a rigid frame), therefore the seat mounting is uncritical (can be glued with tape, not shown in the drawings).

As a result, by simplifying the design, a reduction in mass, material consumption, simplification of manufacturing technology, assembly, etc. is also achieved.

The invention is illustrated by drawings, which depict:

In FIG. 1 is a drawing of a stool with L-shaped legs in three projections with a section along the designated section (image on the section is enlarged).

In FIG. 2 is a drawing of the stool shown in FIG. 1, in axonometric projection (all details are depicted absolutely flat and transparent for clarity).

In FIG. 3 is a diagram of the assembly of the legs of the stool shown in FIG. 2, shown in axonometric projection (legs for illustration are depicted flat).

In FIG. 4 - some of the possible contours of the legs.

In FIG. 5 is a drawing of a stool in three projections, assembled from legs with a horizontal section in the form of a continuous step in the middle part with a section along the section indicated in the plan view (section image is enlarged).

The proposed stool, Fig 1, consists of a seat 1 associated with three identical legs 2. The above structural elements are made as follows. The round seat is carved from plywood with a thickness of at least 6 mm. Leg 2 is cut in a closed L-shaped contour from multilayer plywood 12-14 mm thick. In the horizontal section near the legs, vertical cuts are made at an angle to the plane of the legs, so that the internal angle between the axes of the cuts (the intersection of the axes along their extension) is also 60 ° (can be seen in the top view). The depth of the cuts is equal to half the width of the legs in the horizontal section (clearly visible in the section), one cutout is located directly above the supporting vertical section of the legs and is directed from top to bottom, and the second cut is directed from bottom to top and is located at the opposite end of the horizontal section. The upper cutouts of the legs are paired into a lock with the lower cutouts of adjacent legs. The horizontal sections of the legs in this case form a rigid trihedral prism, giving rigidity to the frame formed from the legs, additional stiffening elements are not required. The seat rests on a rigid frame and does not carry power loads. The seat mount is uncritical: it can be glued with tape or secured in another primitive way (not shown in the drawings).

A perspective view of a stool shown in FIG. 2, requires no explanation. The seat and legs for clarity of the image shown in the drawing flat and transparent, the width of the vertical cutouts increased.

The assembly diagram of the legs of the stool, shown in perspective view in FIG. 3, needs no explanation. Feet for clarity of the image shown in the diagram flat.

In FIG. 4 shows some of the possible contours of the legs, the images show the position of the cutouts on the horizontal sections of the legs. The inclination angles of the cuts with respect to the planes of the legs are not shown in the drawing. The l-shaped contour shown in FIG. 4a (the upper cutout is close to the middle of the horizontal section), gives a smaller mass of the stool during assembly, and the legs planes are more close to the radial position compared to the stool shown in FIG. 1. The outline of FIG. 4b has a horizontal protrusion in the middle part, there can be two or more such protrusions (suitable for high stools). The contour of FIG. 4c is made with a horizontal section in the form of a continuous step between an inclined descending support section and an inclined section ascending to the seat. A stool of such legs is the lightest.

In FIG. 5 shows a stool assembled from legs with the configuration shown in FIG. 4c, the horizontal portion in the legs is made in the form of a continuous step in the middle part between the descending support portion and the ascending portion associated with the seat. The design description, assembly diagram are similar to those for the stool shown in FIG. 1. The seat 1 is round, cut out of plywood. Legs 2 are cut from multilayer plywood in a closed loop with a horizontal section in the form of a step in the middle part. The stool assembled from such legs is the most compact and lightweight.

The stools shown in the drawings are assembled from three legs. Of the legs made according to the configurations shown in FIG. 4a, b, c (as well as other possible), stools consisting of four legs can be assembled. Legs of the same contour are suitable for assembling a stool. For a stool consisting of four legs, vertical cutouts in horizontal sections are made at right angles to the plane of the legs. Assembly is quick and easy.

Assembling a three-legged stool can cause some difficulties. To facilitate assembly, you need to apply some technological tricks (not shown in the drawings), such as: increasing the gaps in the initial sections of the mating cuts (expanding the cuts towards each other); edge sharpening (chamfering); use of elastic properties of materials; slight weakening of the cross sections in the mating areas (without reducing the allowable strength); making one or more cutouts on one of the legs with a width, for example, twice the thickness of the legs, followed by sealing when assembling the gaps with a captive U-shaped gasket with a thickness equal to the thickness of the leg.

A special form of surfaces and cuts on horizontal sections in the interface (developed by the author and will be declared if there is a need for the organization of mass production). In handicraft production, the solution is the simplest: everything that interferes with assembly is removed with a rasp and supplemented with a blow of a mallet, and there will be no difficulties during subsequent disassembly or assembly.

The author made and successfully tested the stools described in the description to verify the technical solution. The stools turned out to be lightweight, durable and reliable. Disassembled compact (only flat parts).

Claims (3)

1. A stool containing a seat associated with flat legs (width greater than thickness), for example, sawn in a closed circuit from plywood, characterized in that the legs have a vertical or inclined support part and a horizontal section, for example, L-shaped from above, and on it made at an angle to the plane of the leg two vertical cuts with a width of at least the thickness of the legs and a depth equal to half the width of the legs in the horizontal section, one cut is directed from top to bottom and is located above the supporting section of the legs or closer to the middle horizontal of the section, and at its opposite end, there is a second cutout directed from the bottom up, and the horizontal sections of the legs form a prism with a connection to the lock due to the pairwise pairing of the upper cutouts with the lower ones at the neighboring legs, so that the mating cutouts are inserted into each other until they stop. 2. The stool according to claim 1, characterized in that the horizontal section at the legs is made in the form of a continuous step in the middle part between the descending support section and the ascending leg section associated with the seat. 3. The stool according to claim 1, characterized in that the horizontal section at the legs is made in the form of a protrusion in the middle part.

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