The present invention relates to the field of civil engineering and is intended for opening and closing the openings of fences and walls by horizontal motion of its movable portion along the opening.

Known in the art is a modification of a cantilever rolling gate having an integral movable portion consisting of two regions having structures different from each other. The main advantage of the gate, like of all console gates, is freedom of the gateway region (i.e. the gateway running portion and the space above it) from structural elements when the gate is fully opened. A prism shape hollow guide that is cut longitudinally from below is fastened in the horizontal position to along the full length of the gate movable portion, which exceeds the width of the gateway 1.33 - 1.5 times. Its main section corresponds to the main area of the gate movable portion, the vertical edges of which are beyond the gateway region in the longitudinal direction (i.e. motion direction of the gate movable portion) when they are in a closed position, and are disposed at certain distances from edges adjacent to the gateway, the sum of the distances (hereinafter - covering over size) is 0.2 - 0.4 m as a rule. The additional section of the guide is an extension at the rear (i.e. gateway) side, it is reinforced with stiffening elements and forms together with them an additional region of the gate movable portion, by means of which it is abutted on a bearing support with two rollers fastened to a concrete understructure beyond the gateway rear edge, the first one of them being disposed at the gateway edge, and the another one being spaced apart in longitudinal direction by 33 - 50% of the gateway width (in accordance with the movable portion of the gate).

Due to such an arrangement of the bearing supports, which is common to all structures of a console gate, a weight vector applied on the mass center of the gate movable portion extends from the zone between them in the longitudinal direction when the gate is in closed position, and it is located at the distance of approximately half width of the gateway from the first bearing, which is why the weight (hereinafter - the gate weight) of the gate movable portion with respect to the mentioned support creates a moment equal to the product of it by the mentioned distance, which loads the additional region of the gate movable portion by a bending moment, and the concrete understructure - with torque. Under its influence, downwardly directed load exceeding the gate weight 2 -2.5 times arises onto the first bearing support, and upwardly directed load exceeding the gate weight 1 - 1.5 times arises onto the second bearing support. The total load exceeds the gate weight 3 - 4 times. The transversal (i.e. horizontal that is perpendicular to the longitudinal direction) force developed by the wind in the entire area of the main area of the gate movable portion (hereinafter - the wind force), of which equivalent force, as a rule, is applied on the mass center of approximately the main area of the gate movable portion, creates a moment that equals to the half of the product of the wind force by the width of the gate, which loads the additional region of the gate movable portion by a bending moment. Owing to its influence, the maximum transversal force acting on the first bearing support exceeds the wind force 2-2.5 times, and that which acts on the second bearing support exceeds the wind force 1-1.5 times, and the total load exceeds 3 - 4 times.

Such loads hold high level demands against the rigidity and wearing capacity of the guide and the bearing supports, necessitates the use of the additional region of the gate movable portion and the arrangement of a concrete understmcture having mass exceeding that of the gate movable portion several times. The force required for moving the gate movable portion is directly proportional to the sum of the above mentioned full loads which makes the manual control difficult and increases the engine power.

In result of the foregoing, the expences required for the bearing elements of the gate - bearing supports, the additional regionof the gate movable portion, guide, and the concrete understmcture reaches 35-50% of the gate self cost (without an engine), the increased power of the engine increases the expences required for it. The invention has for its objective to reduce the gate self-cost by dramatic reduction of the mentioned expenses. To this end, creation of moments of the wind force and the gate weight with respect to the first bearing support must be prevented, which is impossible with the console gate and requires a structural modification. While modifying, the freedom of the gateway area from the structural elements must be retained in the fully opened state.

In order to address the mentioned technical problem, the distance between the two bearing supports fastened to the concrete understmcture equals to the half width of the gateway; the length of the gate movable portion exceeds the width of the gateway by the covering size; a beam having the length exceeding the length of the gate movable portion by 2-3% (basic portion) is mounted thereon in a horizontal position with the capability of being moved longitudinally relative thereto within the boundaries of the half width of the gateway, to perform the function of the frontal support of the gate movable portion (i.e. the closing side) when it is moving in both directions at the frontal portion of the gateway (i.e. between the closed and opened positions); a receiving support is fastened to the wall and/or understructure at the frontal edge of the gateway, at the height of the beam, for receiving the basic portion of the beam and fixing it in a vertical and transversal directions; the gate is provided with a control device to fixedly accommodate the basic portion of the beam in the receiving support when the gate movable portion is moving in the frontal half of the gateway, and for receiving the motion therefrom and converting into the beam motion with the speed twice as much as the coincident direction, when it is moving in the rear half of the gateway (i.e. between the semi-opened and fully opened positions).

Technical result of the present invention is simplification of the gate structure, reduction of the engine power, and facilitation of the manual control.

The technical result is achievable by that the front side of the gate movable portion, when it moves in the front half of the gateway, abuts upon the receiving support by means of the beam, which excludes the need in the additional region of the gate movable portion, the mass is reduced and the structure becomes more simple; the torque is not created on the understmcture and thereby its mass reduces 4-5 times and makes the structure more simple; while moving in the rear half of the gateway, the gate movable portion abuts onto the bearing supports, its mass center moves between them, and therefore only downwardly directed loads act on the supports in the vertical direction, the sum of which does not exceed the gate weight, and the sum of the transversal loads does not exceed the wind force, which is why the level of requirements imposed to the rigidity wearing capacity is much less and use of more simple structure is possible; loads acting on the bearing elements are reduced, thereby reducing the engine power 2- 3 times. As concerns the beam, the maximum bending moments acting thereon are 8 times less than the same moments acting on the additional region of the gate movable portion, therefore the mass of the beam and the control device is small, the structure is simple and does not exert significant negative impact on the positive effect attained by the aforementioned factors.

The essence of the present invention can be understood by the drawings, wherein one of the possible embodiments of the Tollable gate is shown:

Fig. 1 shows the common view of the gate from inside (from the side of an yard), in a closed position;

Fig. 2 shows the view of the beam and the control device from above, near the semi-opened position;

Fig. 3 shows the view of the beam and the control device in the longitudinal direction. Rollers 2, 3, 4, and 5 are fastened to the gate movable portion 1 and between them a beam 6 is disposed in a horizontal position. The rollers 4 and 5 are disposed immediately at the front edge of the gate movable portion 1, the distance between the centers of them and rollers 2 and 3 in longitudinal direction being equal to the sum of the diameter of the rollers, the biggest dimensional size of the beam 6 cross section profile and half width of the gateway. The frontal side of the gate movable portion 1 abuts in vertical and transversal directions on a receiving support 7 fastened to the wall at the gateway front edge by means of the beam 6 basic portion, and the rear side is fastened to gate movable portion 1 abuts by means of a guide 8 fastened to the gate movable portion 1 on a bearing support 9 fixed on an understructure, the similar bearing support 10 to which is disposed from it at the distance equal to the half the width of the gateway. The components of the control device is a projection 11 fastened to the beam 6, and a slider 12 mounted with the capability of being moved longitudinally, a projection 13 disposed thereon and an elastic element (chain, cable, belt and the like) bidirectionally outstretched on rollers 3 and 4, fasteners 15 and 16 connecting its opposite sides (the upper side in the figure coincides with lower generatrix of the beam 6) with the slider 12 and beam 6. The components of the control device is a protrusion 11 fastened to the beam 6 and a slider 12 mounted with the capability of being moved longitudinally, a protrusion 13 disposed thereon and an elastic element (chain, cable, belt and the like) bidirectionally outstretched on rollers 3 and 4, fasteners 15 and 16 connecting its opposite sides (the upper side in the figure coincides with lower generatrix of the beam 6) with the slider 12 and beam 6, a bracket 1 fastened to the wall at the rear edge of the gateway, a plate 18 mounted thereon, a barrier 19 fastened to the latter and fixing means 20 and 21 disposed with the capability of being moved in transversal direction, springs 22 and 23 pressed to it, a cam 24 having the profile of an equilateral trapezium, of which center is spaced apart from the rear edge of the gate movable portion 1 at the distance equal to half the width of the gateway.

The gate operates in the following manner: in a closed position, the projection 11 is disposed between the barrier 19 and the fixing means 20 and fixes the beam 6; the rear side of the gate movable portion 1 with the guide 8 abuts on the bearing support 9, the frontal side abuts on the beam 6 by means of the roller 5, which abuts with its basic portion on the receiving support 7. When the gate movable portion 1 is moving in the frontal half of the gateway, the beam 6 is immobile, the frontal side of the gate movable portion 1 abuts on its upper surface by means of the roller 5 and moves by rolling, and the rear side by the guide 8 also moves by rolling onto the bearing support 9 rollers. Together with the beam, also immobile is the upper side of the elastic member 14 attached to it by the fastener 15. The roller 3 fastened to the gate movable portion 1, like a mobile block and tackle, enables the free lower side of the elastic member 14 together with the slider 12 connected to it with the fastener 12 and with the projection 12 to move with double speed of the coincident direction. When reaching the semi-opened position, the guide 8 enters into contact with the bearing support 10, the cam 24 acts on the fixing means 21 by the left side of the trapezium shape profile, pulls (releases) it and makes a path towards the barrier 19 available to the projection 13, and then releases the fixing means 20 and releases the projection 11, the projection 13 abuts on the barrier 19 and stops together with the slider 12 and the lower side of the elastic member 14 connected to it by means of the fastener 16. The upper side starts moving together with the beam 6 with the speed twice as much as that of the direction coinciding the gate movable portion 1, the fixing means 20 and 21 are locked by the action of the springs 22 and 23, the projection 13 is fixed between the barrier 19 and the fixing means 21, the gate rolls on the rollers of the supports 9 and 10. At the end of the run, the beam 6 completely leaves the gateway area and takes the same position with respect to the gate movable portion 1 as that it had taken in the closed position. In the process of being closed, when the gate movable portion 1 moves in the rear half of the gateway, the projection 12 abuts upon the fixing means 21, the slider 12, fastener 16 and the lower side of the elastic member 14 are immobile, and the upper side moves with the speed twice as much as that of the direction coinciding the gate movable portion 1 by the action of the roller 4, it forces the beam 6 to move and to return it back in the gateway area. Upon attaining the semi-closed (i.e. semi-opened) position, the cam 24 releases the fixing means 20 with its right side, clears the path for the projection 11, the basic portion of the beam 6 comes into contact with the receiving support 7, whereafter the cam 24 removes the fixing means 21 and liberates the projection 13, the projection 11 abuts onto the barrier 19, brings the beam 6 to a halt together with the fastener 15 and the upper side of the elastic member 14, and the lower side together with the slider 12 and the projection 13 start moving with the speed twice as much as that of the direction coinciding the gate movable portion 1, the beam 6 again plays a role of the frontal support, the guide 8 drags out of the contact with the bearing support 10, the fixing means 20 and 21 are locked by the action of the springs 22 and 23. After having been completely closed, all of the elements return back into the starting position.