UA124969C2 - MODULAR RETAIL SYSTEM - Google Patents

Abstract

The present invention relates to a modular system for the construction of shop windows for retail and a method of its assembly. This system contains three basic components: the rack, the transverse element and the longitudinal element, which are assembled to form a supporting structure. These three components are assembled with the possibility of disassembly according to each corner area so as to form an upper plane so that no component protrudes relative to the other two. The components are formed with a set of appropriate means of engagement and in the connected state, each of these three components is aligned parallel to the direction of the three directions perpendicular to each other. Said rack on at least one of its sides is equipped with a number of pairs of grooves equidistant from each other, and the specified side is parallel to the longitudinal axis of the specified longitudinal element. The longitudinal element at each end is equipped with a wing, the longitudinal axis of the wing which is oriented perpendicular to the longitudinal axis of the longitudinal element. Said wing extends parallel to the axis of the rack in the connected state and is equipped with at least two hooks aligned relative to each other in a direction parallel to the rows of grooves on said rack, and made interacting with at least two grooves of at least one row of grooves. These hooks and grooves are located at a distance from the upper side of the rack and from the upper side of the longitudinal element, respectively, so that the upper side of the longitudinal element is in the same plane with the upper side of the rack or with a plane parallel to the upper side of the rack. When installed on a rack, the transverse element is such that its longitudinal axis is perpendicular to the side of the rack, equipped with rows of grooves. The transverse element at its ends is equipped with two extensions running parallel to the specified rows of grooves or the longitudinal axis of the specified rack. Each extension has at least two pairs of connecting teeth aligned in the direction of a number of grooves and coinciding with at least two grooves of one of the rows of grooves. The teeth are located at a distance from the upper side of the transverse element so as to ensure the location of the upper side of the transverse element in the same plane with the upper side of the rack in the connected state and in the same plane with the upper side of the longitudinal element and rack. the plane of the longitudinal element. It is an object of the present invention to provide a modular system using a limited number of base components (struts, cross members and longitudinal members) adjusted to allow disassembly without the use of fasteners, which is characterized by good mechanical strength.

Description

parallel to the upper side of the rack in the assembled state. When installed on a rack, the transverse element passes in such a way that its longitudinal axis is perpendicular to the side of the rack equipped with rows of grooves. The transverse element at its ends is equipped with two extensions that run parallel to the specified rows of grooves or the longitudinal axis of the specified rack. Each extension has at least two pairs of connecting teeth aligned in the direction of a row of grooves and coincident with at least two grooves of one of the rows of grooves. The teeth are spaced from the upper side of the transverse member in such a way as to ensure that the upper side of the transverse member is flush with the upper side of the post in the connected state and flush with the upper side of the longitudinal member and the post, or flush with the upper side only the plane of the longitudinal element. The task of this invention is to provide a modular system that uses a limited number of basic components (posts, transverse elements and longitudinal elements), adapted in such a way as to provide the possibility of disassembly, without the use of connecting elements, which is characterized by good mechanical stability.

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This invention belongs to the field of furniture technology for large retail stores, and, in particular, to a modular system that can be assembled and disassembled for the construction of shop windows (racks, gondola-type racks, tables, containers, etc.).

Such modular systems are well known in the art; while the basic components of most of them require soldering or attachment using connecting elements made of plastic or aluminum.

The same basic components (post, cross member, longitudinal member) can be provided in limited quantities to build ready-made objects of various types, such as racking, gondola-type racking, tables, containers, etc. At the same time, after welding the basic components for building, for example, a gondola-type rack, the finished gondola-type rack can no longer be disassembled. The main advantage of soldered systems is their stability, which is maximum, and their main disadvantage is the impossibility of assembling and disassembling their basic components. They are completely devoid of flexibility.

For example, in OE 299142380), a modular system is described that uses connecting elements to connect components.

In 5 2016029786, Adso Ipa TesNpoiodievz I R, a modular system is described for the construction of structures for retail trade, which contain three basic components: a rack, a transverse element and a longitudinal element. A plurality of said components are assembled to form a support structure in which said three components are assembled releasably in accordance with each corner region so as to form a top plane so that no component protrudes relative to the other two. in 052012267332, Rabvio Maiiapi, 59493177, E-MAKE SO I TO I О052014116973, M/piproo! CO, a modular system is described for the construction of structures for retail trade, which contain three basic components: a rack, a transverse element and a longitudinal element. A plurality of the specified components are assembled to form a support structure in which the specified three components are assembled with the possibility of disassembly according to each corner region. The transverse element and the longitudinal element form the upper plane, and the rack protrudes on part of the specified node.

Modular systems with connecting elements are characterized by relative stability.

Despite this, the disadvantage of modular systems using connectors is related to the manufacture of different types of connectors, for example, end and intermediate connectors, corner connectors, two-way connectors, three-way connectors connecting elements. This increases the number and variety of components to be manufactured and stored, which is a disadvantage for manufacturers and retail outlets.

The task of this invention is to provide a modular system that uses a limited number of basic components (posts, transverse elements and longitudinal elements), adapted in such a way as to provide the possibility of disassembly, without the use of connecting elements, which is characterized by good mechanical stability.

This problem is solved with the help of a device and a method that has distinctive features of independent claims. Preferred options for implementation and improvement are indicated in the dependent clauses of the claims.

The solution is some type of docking of the components, such as the transverse member and the longitudinal member, to the struts. In particular, these three assembled components provide a uniform plane and the possibility of using racks that have grooves on only one side or on two opposite sides.

In essence, the invention uses racks equipped with pairs of grooves designed to receive the teeth of the transverse elements and the hooks of the longitudinal elements with a very limited clearance in such a way as to ensure good mechanical stability of the three assembled components.

A modular system for assembling showcase structures, according to the present invention, provides a transverse element having an O-shaped shape, which includes a rod with a tubular cross-section connecting two extensions that are IO-shaped arms; a transverse element for the upper connection, made in a downward-facing O-shaped form, and a transverse element for the lower connection, made in an upward-facing O-shaped form; their extensions, having three pairs of I-shaped teeth with a downward-facing cutout on the inner side of the specified I-shaped shape for placement in the indicated grooves of the rack; the specified teeth protrude from the specified transverse element in the direction of the longitudinal axis of the specified transverse element; said extension has a protrusion to stabilize the removable docking between the longitudinal element and the rack.

In addition, the modular system for assembling showcase structures, according to the present invention, provides a longitudinal element with an O-shape, which includes a rod with a tubular cross-section connecting two wings that form the shoulders of the specified O-shape; the wings and the tubular rod are connected by the presence of an angle joint that includes a longitudinal rib having a section parallel to said tubular rod, a section perpendicular to said tubular rod and a section connects the two specified areas; the longitudinal element contains three hooks made in the form of an isosceles trapezoid, in which the larger base of the isosceles trapezium is connected through a leg having dimensions smaller than the specified larger base; the hooks are oriented perpendicular to the longitudinal axis of the rod with a tubular section, and protrude under it from the side of the specified corner joint, opposite the rib.

In the modular system for assembling showcase structures according to the present invention, each extension of the cross member is equipped with at least two pairs of teeth aligned with each other with respect to the longitudinal axis of the post, with respect to the grooves of the post in the assembled state, and which are spaced apart so as to be located in two pairs of grooves, and said two pairs of grooves on the rack are spaced in such a way as to leave the intermediate pair of grooves free.

In an embodiment, each extension of the transverse element is equipped with three pairs of teeth, which are aligned with each other relative to the longitudinal axis of the rack, relative to the grooves of the rack in the assembled state, and the two pairs of teeth are located at a distance from each other according to the distance between two adjacent pairs of grooves on the rack, and the other pair of teeth is located at a distance from the adjacent one in such a way as to ensure, in the assembled state, the interaction of this last pair of teeth with a pair of teeth located at a distance from the immediately adjacent pair, leaving the intermediate pair of grooves free.

As will be clear from the following, the modular system for creating showcase structures, in accordance with this invention, provides placement of a pair of teeth 26, 26A of the transverse element in a pair of grooves 5, placement of a pair of teeth 27, 27A in a pair of grooves 6, a free pair of grooves 7, placement of a pair teeth 28 in a pair of grooves 8, and the hook 36 of the longitudinal element is made with the possibility of placement in the free area of one of the grooves b, the hook 37 of the longitudinal

The z element is made with the possibility of placement in the directly adjacent free groove 7, the hook 38 of the longitudinal element is made with the possibility of placement in the free area of the directly adjacent adjacent groove 8.

The first advantage of this invention is the limited number of parts to be manufactured, since the modular system according to this invention does not use connecting elements.

The second advantage of this invention is its modularity, as a limited number of basic components provides the possibility of manufacturing a wide range of finished objects.

A third advantage is that these ready-made objects are made with the possibility of disassembly, and their components can be reused at will through a simple assembly process that requires only a hammer.

The fourth advantage is the good stability of finished objects due to the docking of their components.

The fifth advantage is that this modular system provides the possibility of obtaining aesthetic finished objects.

Other advantages and properties of this invention are disclosed in the following description, which describes in detail the examples of implementations of this invention based on the drawings:

Fi. 1 View in an axonometric projection from the outside of three basic components (post, transverse element and longitudinal element) assembled into a finished object;

Fig. 2 View in an axonometric projection from the inside of three basic components (post, transverse element and longitudinal element) assembled into the finished object;

Fig. C View in an axonometric projection of two racks of different types;

Fig. 4, 4A View in an axonometric projection of two transverse elements, the first of which is intended for the upper connection, and the second - for the lower connection;

Fig. 5 View in the axonometric projection of the longitudinal element;

Fig. 6 View in an axonometric projection of a wall rack;

Fig. 7 View in an axonometric projection of a gondola-type rack;

Fig. 8 View in an axonometric projection of a table on wheels;

Fig. FOR View in an axonometric projection of a table without wheels; 60 Fig. 9 View in an axonometric projection of a clothes hanger;

Fig. 10 Front view of the three base components assembled, with the rack section removed to show the connection between the teeth and grooves.

It should be noted that the three basic components described in this document are rack 1, transverse element 2 and longitudinal element 3. Next, small changes in the basic components will be described, which are indicated by the addition of a letter after a number.

The range of individual base components, and therefore assembled objects, that can be derived can be extended and defined by providing base components of different lengths:

Two types of racks, with grooves on one side 1A and with grooves on two sides 1B, these racks can have a length ranging from 30 cm to 3 meters;

Two types of transverse elements - one transverse element 2 for the upper connection and one transverse element 2A for the lower connection rod 24 with a tubular section of transverse elements 2, 2A can have a length in the range from 20 to 80 cm;

Only one type of longitudinal element C with the possibility of installation on both sides of the rod 34 with a tubular section of longitudinal elements C can have a length in the range from 30 to 140 cm.

It should be noted that the phrases "upper connection", "lower connection" mean that after assembly, the components define a plane in which no component protrudes from the plane defined by the other two components.

In Fig. 1 shows the view in an axonometric projection outside the corner of the assembled three basic components: rack 1, transverse element 2 and longitudinal element 3, assembled into a finished object. In this Figure, you can see that the three components assembled into the finished object define a plane (upper connection), or in other words, that the three components are on the same level.

In Fig. 2 shows the view in an axonometric projection from the inside of the corner of the assembled three basic components: rack 1, transverse element 2 and longitudinal element 3, assembled into a finished object.

In the preferred embodiment, rack 1, rod 24 with a tubular section of the transverse element 2 and rod 34 with a tubular section of the longitudinal element C have the same

Z square cross-section.

In fig. C shows rack 1A and rack 18 having pairs of grooves located at equal intervals. Racks 1 have a square cross-section, and pairs of grooves 10 can be formed only on one side (rack TA with grooves on one side) or on two opposite sides (rack 18 with grooves on two sides).

In Fig. 4 shows the transverse element 2, which provides the possibility of forming an upwardly facing plane between the rack, the transverse element and the longitudinal element (upper connection), which is generally made in the form of an inverted letter |, with downward facing shoulders

MO-like shape. Transverse element 2 has a rod 24 with a tubular cross-section connecting two O-shaped arms; at its ends, two symmetrical extensions (O-shaped arms) are formed, equipped with three pairs of teeth, the first pair of teeth 26, adjacent to the rod 24 with a tubular section, the intermediate pair 27, and the final pair 28.

In Fig. 4A shows the transverse element 2A, which provides the possibility of forming a plane between the transverse element and the longitudinal element, oriented in the downward direction (lower connection), which is generally made in an O-shape. The difference between the transverse element 2 for the upper connection and the transverse element 2A for the lower connection is that the extensions 25 A contain three pairs of their teeth oriented in the downward direction, but said extensions 25 A are moved upwards relative to the extensions 25.

Three pairs of teeth 26, 27, 28 are located at a distance from each other in such a way as to ensure the possibility of their placement in the grooves of the racks 1A or 1B. It should be noted that the pair of teeth 26 and 27 have a distance that ensures the possibility of their placement in two adjacent grooves, and the pair of teeth 28 is located in such a way as to provide the possibility of placement when skipping a pair of grooves directly under one of them, made with the possibility of placing a pair 27 teeth

In the area of extensions 25, 25A between a pair of teeth 27 and 28 or 27A and 28A, which are located further from each other, there is a small protrusion 29, 29A, protruding from the edge of the extension 25.

After assembling the components, placement of the specified protrusion 29, 29A in rack 1 is ensured.

Pairs of teeth 26, 26A; 27, 27A; 28, 28A have an I-shape and a notch oriented in the downward direction, the length of which is approximately half of the total size of the tooth. Pairs of teeth 26, 26A; 27, 27A; 28, 28A protrude from the two ends of the transverse elements 2, 2A in the longitudinal direction of the transverse element itself.

Extensions 25, 25A are formed by bending a section of sheet metal into an O-shape and gluing said extensions inside said rod 24 with a tubular section so that they are not visible from the outside.

In Fig. 5 shows a longitudinal element 3 having a generally O-shaped shape with two arms of the specified O-shaped shape, oriented in the downward direction. Longitudinal element

C is also equipped with a rod 34 with a tubular section, which is a section connecting two O-shaped arms. Two symmetrical wings 35 (two arms) equipped with hooks, one 36 of which is adjacent to the specified rod with a tubular section, an intermediate hook 37 and an end hook 38, are formed at the two ends of the indicated rod with a tubular section.

Hooks 36, 37, 38 are located at a distance in such a way as to ensure the possibility of their placement in three consecutive grooves. The specified hooks are made in the form of an isosceles trapezoid with a leg thinner than the side of the isosceles trapezoid connected to the specified extension 35. The specified hooks 36, 37, 38 protrude from two ends of the longitudinal element C and are oriented perpendicular to the longitudinal axis of the longitudinal element itself; and all hooks are oriented so as to be located on one side of the rod 34 with a tubular section.

Wings 35 are also made by bending and welding a substantially triangular section of sheet metal to rod 34 of tubular cross-section. After soldering, each of these wings 35 contains a corner connection 31, which ensures stability of the assembled objects.

Said corner joint 31 includes a rib projecting from the opposite side of said corner joint 31 relative to hooks 36, 37, 38. Said rib 32 includes a section parallel to said rod 34 with a tubular section, a section perpendicular to said rod 34 with a tubular section , and a section located at an angle of 45" connecting the two said sections. In general, said rib 32 provides improved rigidity of the system, and the upper section of said rib, parallel to the floor, forms a small surface that supports the panel, the load capacity of which is up to 70 kg.

It should be noted that although the transverse members must be different to provide a top connection or a bottom connection (2A for top connections, 2A for bottom connections), the longitudinal member remains the same, only in the bottom connection it is the same the longitudinal element is installed in an inverted position relative to the upper connection.

Fig. 6, 7, 8 and 9 are aimed at illustrating the versatility of the modular system in accordance with the present invention.

In Fig. 6 shows a rack 60 formed by assembling four racks 1A with grooves on one side, four transverse elements 2 and four longitudinal elements 3.

In Fig. 7 shows a gondola-type rack 70 formed by assembling two racks 18 with grooves on two sides, four racks TA with grooves on one side, eight transverse members 2 and six longitudinal members C (the transverse members and the longitudinal member are not shown in the said Figure).

In Fig. 8 shows a table 80 equipped with two panels 81, 82 formed using four racks 1A with grooves on one side; two transverse elements 2, two longitudinal elements C for panel 81; two transverse members 2A, two longitudinal members C for panel 82. It will be apparent to one skilled in the art that this is only one type of table that can be formed from a modular system in accordance with the present invention. Not shown variants of the table 80 can be, for example, a table 83 without wheels; a table with only one panel 81, with or without wheels 83; said tables may be formed to any desired height by suitably cutting said four posts 1.

Alternatively, the same basic structure can be used to construct a container (not shown) with or without wheels 83, containing only the bottom panel 82 and four side walls so as to enclose the parallelepiped structure on its four sides.

It should be noted that the transverse elements 2A used for the lower part of the specified table 80 differ from the transverse elements 2 used in other

Figures as final details for the upper sections of the assembled object. In fact, the transverse members 2A mirror the transverse members 2 in such a way as to provide the same alignment between the transverse members and the longitudinal members, but oriented in the downward direction. In fact, when comparing Fig. 8 and Fig. 8A, and in particular the position of panels 82 and 82A, it is apparent that panel 82 of FIG. 8 is located below panel 82A of FIG. 8A, that is, panel 82 is located closer to the end point of said four TA racks than panel 82A. because the geometries used do not allow to provide a lower connection that mirrors the upper connection; in the downward direction, the struts 1 are completed, protruding approximately 1 cm relative to the downwardly oriented plane defined by the transverse elements 2A and the longitudinal element 3.

In Fig. 9 shows a clothes rack 90 that can be used to display various types of clothing and accessories. The basic structure of the said clothes hanger 90 is formed by assembling four racks 1A with grooves on one side, two transverse members 2, two transverse members 2A, and four longitudinal members 3. In addition, the said clothes hanger 90 contains some accessories such as, for example, a crossbar 91 for clothes and a pair of shelves 92.

It should be clarified that the panels 81, 82, made of wood, metal, plastic, glass, can be installed in three different ways on the structure formed by the basic components: rack 1, transverse element 2 and longitudinal element 3:

With the use of pairwise opposite four ribs 32 on their section parallel to the floor.

Since said rib 32 is at the height of the lower side of the rod 25 and 35 with a tubular section, said panel 81, 82 is aligned with the upper sides of said rod with a tubular section, only if its thickness corresponds to the thickness of said rod with a tubular section; if the specified panel is thinner than the specified rod with a tubular section, the specified panel is deepened relative to the plane (upper joint) defined by the connection of the specified basic components: the rack, the transverse element, the longitudinal element.

Using connectors 84 deep as shown in FIG. 8. Said depth connectors, well known in the art, can be made to place said panel 81 flush with the plane defined by the connection of the three basic components: the post, the cross member, the longitudinal member, as shown in fig. 8, by selecting a suitable bend height of the depth connector according to the thickness of the specified panel and to achieve the desired effect. In the case of using the cross member 2A, the rib 32 is at the same height as the upper connection of the tubular bar and cannot be used to support the panel: therefore, the use of depth connectors is mandatory.

Z Panels 81, 82 can rest on a plane defined by the connection of three basic components: a rack, a transverse element, a longitudinal element (not shown). The specified panel is attached to the structure by known methods.

In fig. 10 shows the interactions between the three basic components: rack 1, transverse element 2 and longitudinal element C due to the removal of a section of rack 1. In particular, a pair of teeth 26, 26A of the transverse element 2, 2A is made with the possibility of placement in a pair of grooves 5, a pair of teeth 27, 27A is made with the possibility of being placed in a pair of grooves 6, a pair of grooves 7 remains free, a pair of teeth 28 is made with the possibility of being placed in a pair of grooves 8, and the hook 36 of the longitudinal element is made with the possibility of being placed in the free area of one of the grooves 6, the hook 37 of the longitudinal element is made of with the possibility of placement in the free immediately adjacent groove 7, the hook 38 of the longitudinal element is made with the possibility of placement in the free area of the immediately adjacent groove 8.

For clarity, the assembly of three components will first be described: the rack 1, the transverse element 2 and the longitudinal element 3, as shown in Fig. 1 and 2. The specified assembly is described for clarity only and may not actually occur as described later in this document.

At the first stage of the specified assembly, the transverse element 2 or 2A is connected to the rack 1A or 18 until all pairs of teeth 26 or 26A are placed; 27 or 27A; 28 or 284A in place, and their corresponding cutout rests on the lower part of the pair of grooves. Assembly is carried out using a hammer in such a way as to ensure the placement of each protrusion 29 in the same groove occupied by the end tooth 28 or 28A. This docking does not allow you to pull out the specified transverse element 2 or 2A in the upward direction and significantly improves the final stability of the assembled object.

In particular, with reference to fig. 10, the rack 1A or 1B has four pairs of grooves 5, 6, 7, 8, counting from the upper end of the rack. A pair of teeth 26 is placed in a pair of grooves 5, a pair of teeth 27 is placed in a pair of grooves 6, a pair of grooves 7 is left free, a pair of teeth 28 is placed in a pair of grooves 8.

At the second stage of assembly, the longitudinal element Z is installed on the node of the rack 1 and the transverse element 2. The hook 36 and the longitudinal element Z are placed in the free area of one of the grooves b, the hook 37 is placed in the free groove 7 located below, the hook 38 is placed in the free area of the located below groove 8 (in fact, hooks 36, 37, 38 lie in the same plane). The teeth 36, 37, 38 are narrowed in direction to the end of the tooth in the direction of insertion into the rack in such a way as to facilitate assembly. These teeth are made in the form of an isosceles trapezoid with a leg, and the size of the larger base is slightly smaller than the size of the groove. As a result, at the start of insertion, the prong occupies the entire space of the groove. After placing the longitudinal element C in place on the rack 1, the longitudinal element C is hammered to ensure that the leg of each tooth is placed in place in the lower part of each groove.

This method of assembling the assembled object 60, 70, 80, 90, according to this invention, includes the following stages: a. Assembling the first corner of the first truss: rack 1 is placed on the floor with its grooves oriented upwards. A pair of teeth 26 of the transverse element 2 are inserted into the first pair of free grooves 5 at the end of the indicated rack.

Said transverse member 2 is placed in place on the post 1 and with the help of a hammer is pushed in the direction of the axis of the post until the protrusion 29 is placed in the groove 8, and therefore until the location of the upper surface of the transverse member 2 is flush with the end of the post 1. The assembly provides a rigid assembly rack and transverse element. r. Installation of the second transverse element at the opposite end of the rack: according to the desired position of the second transverse element 2 on this same rack 1, pairs of teeth 26, 27, 28 are inserted into suitable grooves in the lower part of the rack and with the help of a hammer are pushed in such a way as to ensure terminating the protrusions 29 in the same pair of grooves as the pair of prongs 28. Thus, a C-shaped rigid assembly is provided. with. Formation of the first truss: to complete the formation of the first truss, the second post 1, preferably of the same size as the previous one, is simultaneously placed in the pairs of grooves (tritres) of the C-shaped assembly formed earlier, using a hammer and holding the cross members as follows , to place two projections 29 and a pair of teeth 28 in place in one pair of grooves. Thus, they form a truss that is comparable in stiffness to a truss rigidly formed by welding these components. The farm, containing two racks TA and two transverse elements 2, is marked by a dotted area in Fig. 6. a. Formation of the second truss: the second truss is formed by repeating stages a, p, c

There is. Formation of a three-dimensional structure: two trusses are placed at a certain distance to ensure the introduction of the first longitudinal element 3, and the upper section of the longitudinal element Z is aligned with the level of the trusses in such a way as to ensure the possibility of placing the tooth 38 in the free area of the groove occupied by the tooth 28 of the transverse element 2. After inserting the hooks 36, 37, 38 into the free areas of three consecutive grooves, the transverse element C is struck with a hammer in such a way as to ensure that the legs are placed in place on the corresponding grooves. This stage is also repeated for the assembly of the second longitudinal element.

It should be noted that all basic components assembled in this way can be disassembled with a hammer and reused to build ready-made objects 60, 70, 80, 90, which differ from the previous ones. 1A rack with grooves on one side 18 rack with grooves on two sides 2 cross member for upper connection 2A cross member for lower connection

With a longitudinal element 10 a groove 24 a rod with a tubular section 25 an extension 26 a tooth adjacent to a rod with a tubular section 27 an intermediate tooth 28 an end tooth 29 a protrusion 31 an angular connection 32 a rib 34 a rod with a tubular section 35 wings 36 a hook adjacent to a rod with tubular section 37 intermediate hook 38 end hook bo 60 rack

70 gondola type rack 80 table 81 panel 82 panel 83 wheel

84 depth connector 85 table 90 clothes hanger 91 clothes crossbar

92 shelves

Claims (11)

FORMULA OF THE INVENTION 1. A modular system for the construction of display structures (60, 70, 80, 85, 90) for retail trade, which contains three basic components: a rack (1А, 18); transverse element (2); a longitudinal member (3), wherein a plurality of said components are assembled to form a support structure, wherein said three components (1, 2, 3) are releasably assembled according to each corner region so as to form a top plane so that no component protrudes relative to the other two, which differs in that the three specified components (1, 2, 3) are formed with a set of corresponding means of engagement and in the connected state each of the three specified components is aligned parallel to the direction from three directions perpendicular to each other, and the rack (1) on at least one of its sides is equipped with a number of pairs of grooves (10), equidistant from each other, and the specified side is parallel to the longitudinal axis of the specified longitudinal element; the longitudinal element (3) at each end is equipped with a wing (35), and the longitudinal axis of the wing Zo is oriented perpendicular to the longitudinal axis of the longitudinal element itself, the wing runs parallel to the axis of the rack (1) in the connected state and is equipped with at least two hooks (36, 37, 38), aligned relative to each other in a direction parallel to the rows (10) of grooves on the specified stand, and made with the possibility of interaction with at least two grooves of at least one row of grooves; hooks (36, 37, 38) and grooves (10) are located at a distance from the upper side of the rack and from the upper side of the longitudinal element, respectively, so that the upper side of the longitudinal element is located in one plane with the upper side of the rack or with a plane parallel to on the upper side of the rack in the assembled state; and when installed on the rack (1), the transverse element (2) passes in such a way that its longitudinal axis is perpendicular to the side of the rack equipped with rows of grooves; the transverse element (2) at its ends is equipped with two extensions (25, 25A) that run parallel to the specified rows of grooves or the longitudinal axis of the specified rack; each extension (25, 25A) has at least two pairs of connecting teeth (26, 27, 28; 26A, 27A, 28A) aligned in the direction of a row of grooves (10) and coinciding with at least two grooves of one of the rows of grooves and which form two rows of parallel teeth, and which coincide with the grooves (10) of one of the two rows in such a way that the connection between the rack (1) and the transverse element (2, 2A) ensures the interaction of at least two grooves of each row, and the hooks (36, 37, 38) of the longitudinal element (3), which are located on the same side as the teeth (26, 27, 28; 26A, 27A, 28A), interact with at least some grooves of the row when the teeth of the transverse element are introduced into the interaction; teeth (26, 27, 28; 26A, 27A, 28A) are located at a distance from the upper side of the transverse element (2, 2A) in such a way as to ensure the location of the upper side of the transverse element in one plane with the upper side of the rack (1) in in the combined state and in the same plane with the upper side of the longitudinal element (3) and the rack (1), or in the same plane only with the upper plane of the longitudinal element (3). 2. A modular system for the construction of display structures (60, 70, 80, 85, 90) for retail trade, which contains three basic components: a rack (1A, 18); transverse element (2A); 60 longitudinal element (3), wherein a plurality of said components are assembled to form a support structure, and said three components (1, 2, 3) are assembled with the possibility of disassembly according to each corner region in such a way as to ensure the formation of said transverse member and longitudinal member of the upper plane, and the rack protrudes from part of the specified node, which is characterized by the fact that the three specified components (1, 2, 3) are formed with a set of corresponding means of engagement, and in the connected state each of the three specified components is aligned parallel to the direction from three directions perpendicular to each other, and the rack (1) on at least one of its sides is equipped with a number of pairs of grooves (10), equidistant from each other, and the specified side is parallel to the longitudinal axis of the specified longitudinal element; the longitudinal element (3) is equipped at each end with a wing (35), and the longitudinal axis of said wing is oriented perpendicular to the longitudinal axis of the longitudinal element itself, and the wing runs parallel to the axis of said strut (1) in the connected state and is equipped with at least two hooks (36, 37, 38), aligned relative to each other in a direction parallel to the rows (10) of grooves on the rack and designed to interact with at least two grooves of at least one row of grooves; hooks (36, 37, 38) and grooves (10) are located at a distance from the upper side of the rack and from the upper side of the longitudinal element, respectively, so that the upper side of the longitudinal element is located in one plane with the upper side of the rack or with a plane parallel to the indicated upper side of the rack in the assembled state; and when installed on the rack (1), the transverse element (2) passes in such a way that its longitudinal axis is perpendicular to the side of the rack equipped with rows of grooves; the transverse element (2) at its ends is equipped with two extensions (25, 25A) that run parallel to the specified rows of grooves or the longitudinal axis of the specified rack; each extension (25, 25A) has at least two pairs of connecting teeth (26, 27, 28; 26A, 27A, 28A) aligned in the direction of a row of grooves (10) and coinciding with at least two grooves of one of the rows of grooves and which form two rows of parallel teeth, and which coincide with the grooves (10) of one of the two rows in such a way that the connection between the rack (1) and the transverse element Zo (2, 2A) ensures the interaction of at least two grooves of each row, and the hooks (36 , 37, 38) of the longitudinal element (3), which are located on the same side as the teeth (26, 27, 28; 26A, 27A, 28A), interact with at least some grooves of the row when the teeth of the transverse element are introduced into the interaction; teeth (26, 27, 28; 26A, 27A, 28A) are located at a distance from the upper side of the transverse element (2, 2A) in such a way as to ensure the location of the upper side of the transverse element in one plane with the upper side of the rack (1) in in the combined state and in the same plane with the upper side of the longitudinal element (3) and the rack (1), or in the same plane with the upper plane of the longitudinal element (3). 3. A modular system for building display structures (60, 70, 80, 85, 90) for retail trade according to claim 1 or 2, in which the rack (1) has a square cross-section, and a pair of grooves (5, 6, 7, 8 , 10, ...) is located at an equal distance; and the specified pair of grooves is located only on one side of the rack (TA) or on two opposite sides of the rack (18). 4. A modular system according to one or more of the preceding points, in which each extension (25, 25A) of the transverse element (2, 2A) is equipped with three pairs of teeth (26, 27, 28; 26A, 27A, 28A), which are located in two in parallel rows and each of which coincides with a row of grooves (10). 5. A modular system according to one or more of the preceding points, in which each wing (35) of the longitudinal element (3) is equipped with three hooks (36, 37, 38) located in a single row, which coincides with a row of grooves (10). 6. A modular system according to one or more of the preceding points, in which the transverse elements (2A), interacting with the lower part of the rack, are identical to the transverse elements (2) for the upper part, and their extensions (25A) are oriented in the direction opposite to the transverse elements for upper connection; an identical type of longitudinal element (3) is used to connect to the upper or lower end of the racks (TA, 18), and the longitudinal element (3) is inverted for its assembly with the upper or lower part of the racks. 7. A modular system for the construction of showcase structures (60, 70, 80, 85, 90) for retail or trade according to one or more of the previous items, in which the rack (TA, 18) and the bar (24, 34) with a tubular cross-section element (2, 2A) and longitudinal element (3) have the same square cross-section. 8. A modular system for the construction of display structures (60, 70, 80, 85, 90) for retail trade according to one or more of the previous items, in which a rack (1A) with grooves on one side and a rack (18) with grooves on two sides the sides have a length in the range from 30 cm to 3 meters; the transverse element (2) for the upper connection and the transverse element (2A) for the lower connection are provided with a rod (24) with a tubular section, having a length in the range from 20 to 80 cm; longitudinal elements (3) are equipped with a rod (34) with a tubular cross-section, which has a length in the range from 30 to 140 cm. 9. The method of assembling the modular system (1, 2, 3) according to claims 1-8, in which the rack (1) on at least one of its sides is equipped with a number of pairs of grooves (10), equidistant from each other, and the specified side is parallel to the longitudinal axis of the specified longitudinal element; the longitudinal element (3) at each end is equipped with a wing (35), and the longitudinal axis of the wing is oriented perpendicular to the longitudinal axis of the longitudinal element itself, the wing runs parallel to the axis of the rack (1) in the connected state and is equipped with at least two hooks (36, 37, 38 ), aligned relative to each other in a direction parallel to the rows (10) of grooves on the specified stand, and made with the possibility of interaction with at least two grooves of at least one row of grooves; hooks (36, 37, 38) and grooves (10) are located at a distance from the upper side of the rack and from the upper side of the longitudinal element, respectively, so that the upper side of the longitudinal element is located in one plane with the upper side of the rack or with a plane parallel to the indicated upper side of the rack in the assembled state; and when installed on the rack (1), the transverse element (2) passes in such a way that its longitudinal axis is perpendicular to the side of the rack equipped with rows of grooves; the transverse element (2) at its ends is equipped with two extensions (25, 25A) that run parallel to the specified rows of grooves or the longitudinal axis of the specified rack; each extension (25, 25A) has at least two pairs of connecting teeth (26, 27, 28; 26A, 27A, 28A) aligned in the direction of a row of grooves (10) and coinciding with at least two grooves of one of the rows of grooves and which form two rows of parallel teeth, and which coincide with the grooves (10) of one of the two rows in such a way that the connection between the rack (1) and the transverse element (2, 2A) ensures the interaction of at least two grooves of each row, and the hooks (36, 37, 38) of the longitudinal element (3), which are located on the same side as the teeth (26, 27, 28; 26A, 27A, 28A), interact with at least some grooves of the row when the teeth of the transverse element are introduced into the interaction; teeth (26, 27, 28; 26A, 27A, 28A) are located at a distance from the upper side of the transverse element (2, 2A) in such a way as to ensure the location of the upper side of the transverse element in one plane with the upper side of the rack (1) in in a connected state and in the same plane with the upper side of the longitudinal element (3) and the rack (1), or in the same plane with the upper plane of the longitudinal element (3), and the method includes the following steps: a) assembly of the transverse element (2, 2A) on racks (1A, 18): the cross member (2, 2A) is inserted into the rack (1A or 1B) in such a way as to place all pairs of teeth (26, 26A, 27, 27A, 28, 284A) in place, with their respective cutouts rest on the lower part of pairs (5, 6, 7, 8) of grooves; said installation is carried out using a hammer in such a way as to ensure the placement of each projection (29, 29A) in the same groove (8) occupied by the end tooth (28, 28A); p) installation of the longitudinal element (3) on the rack node (TA, 18) and the transverse element (2, 2A): the longitudinal element (3) is assembled with the rack node (1) and the transverse element (2), insert the hook (36) of the longitudinal element (3) into the free area of one of the grooves (b), hook (37) into the free adjacent groove (7), hook (38) into the free area of the adjacent groove (8); after placing the longitudinal element in place on the rack (TA, 18), the longitudinal element (3) is hammered in such a way as to ensure that the leg of each hook (36, 37, 38) is placed in place in the lower part of the grooves (6, 7, 8) . 10. The method of assembling a modular system (1, 2, 3) according to claims 1-9, in which: the rack (1) on at least one of its sides is equipped with a number of pairs of grooves (10), equidistant from each other, and the specified side is parallel to the longitudinal axis of the specified longitudinal element; the longitudinal element (3) is equipped at each end with a wing (35), and the longitudinal axis of said wing is oriented perpendicular to the longitudinal axis of the longitudinal element itself, and the wing runs parallel to the axis of said strut (1) in the connected state and is equipped with at least two hooks (36, 37, 38), aligned relative to each other in a direction parallel to the rows (10) of grooves on the rack and designed to interact with at least two grooves of at least one row of grooves; hooks (36, 37, 38) and grooves (10) are located at a distance from the upper side of the rack and from the upper side of the longitudinal element, respectively, so that the upper side of the longitudinal element is located in one plane with the upper side of the rack or with a plane parallel to the indicated upper side of the rack in the assembled state; and when installed on the rack (1), the transverse element (2) passes in such a way that its longitudinal axis is perpendicular to the side of the rack equipped with rows of grooves; the transverse element (2) at its ends is equipped with two extensions (25, 25A) that run parallel to the specified rows of grooves or the longitudinal axis of the specified rack; each extension (25, 25A) has at least two pairs of connecting teeth (26, 27, 28; 26A, 27A, 28A) aligned in the direction of a row of grooves (10) and coinciding with at least two grooves of one of the rows of grooves and which form two rows of parallel teeth, and which coincide with the grooves (10) of one of the two rows in such a way that the connection between the rack (1) and the transverse element (2, 2A) ensures the interaction of at least two grooves of each row, and the hooks (36, 37, 38) of the longitudinal element (3), which are located on the same side as the teeth (26, 27, 28; 26A, 27A, 28A), interact with at least some grooves of the row when the teeth of the transverse element are introduced into the interaction; teeth (26, 27, 28; 26A, 27A, 28A) are located at a distance from the upper side of the transverse element (2, 2A) in such a way as to ensure the location of the upper side of the transverse element in one plane with the upper side of the rack (1) in connected state and in the same plane with the upper side of the longitudinal element (3) and the rack (1), or in the same plane with the upper With the plane of the longitudinal element (3), and the method includes the following steps: a) assembly of the first corner of the first truss: the transverse element (2, 2A) is installed on the rack (1A, 1B) in such a way as to ensure the placement of the transverse element in place on the rack, and then a pair of protrusions (29, 29A) is placed in a pair of grooves (8); B) assembly of the second transverse element at the opposite end of the rack: according to the desired position of the second transverse element (2, 2A) on the same rack (1A, 18), pairs of teeth (26, 264A, 27, 27A, 28, 28A) are inserted into suitable grooves in the lower part of the rack and are hammered in such a way that the protrusions (29, 29A) end in the same pair of grooves as the pairs (28, 28A) of teeth, forming a rigid C-shaped knot; c) formation of the first truss: to complete the formation of the truss, the second rack (TA, 18), which preferably has the same dimensions as the previous one, is simultaneously inserted into the three pairs of grooves of the C-shaped node formed earlier, in such a way as to place two protrusions (29, 29A) in place, placing them in one pair of grooves with a pair of teeth (28, 28A): a) formation of the second truss: the second truss is formed by repeating stages a, b, c; f) the formation of a three-dimensional structure, two trusses are placed at a certain distance based on the length of the rod (34) with a tubular section to ensure the possibility of introducing the first longitudinal element (3), and the upper section of the longitudinal element (3) is aligned with the level of the trusses in such a way as to provide the possibility of placing the tooth (38) in the free area of the groove (8) occupied by the tooth (28, 28A) of the transverse element (2, 2A); after inserting the hooks (36, 37, 38) into the free areas of the two grooves (b, 8) and inserting the hook (37) into the free groove (7), the transverse element (3) is hit with a hammer in such a way as to ensure that the legs are placed in place on corresponding grooves; 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