GB2093513A

GB2093513A - Sliding Gate

Info

Publication number: GB2093513A
Application number: GB8203171A
Authority: GB
Original assignee: MALKMUS DOERNEMANN CAROLA
Current assignee: MALKMUS DOERNEMANN CAROLA
Priority date: 1981-02-25
Filing date: 1982-02-04
Publication date: 1982-09-02
Also published as: CH655354A5; FR2500523B1; BE891644A; NL190991C; GB2093513B; NL190991B; DE3106927C2; FR2500523A1; NL8105678A; DE3106927A1

Abstract

A sliding gate comprises a gate member (1) having a bottom flange (2) of box profile (10) which is strengthened by longitudinal bracing elements (6, 7) between which transverse webs (9) are located, the transverse webs (9) being connected to the side walls (11) of the box profile (10) at the bottom (13) of grooves (12) which extend longitudinally of tire gate member (1) in the side walls (11) and a roller support and guide rail (4, 5). <IMAGE>

Description

SPECIFICATION A Sliding Gate The invention relates to a sliding gate, for example a cantilevered sliding gate with a bottom flange in the form of a box profile. In one such gate, the bottom flange is fixed to the gate member, which is given rigidity by two U-shaped parallel spaced profiled elements running longitudinally of the gate and transverse webs arranged between the profiled elements and which extends across a support and guide rail for a roller support, said rail being connected to the reinforcement.

Sliding gates of the type mentioned above are equipped with a reinforced bottom flange which has to be dimensioned both of forces caused by the inherent weight of the gate and for externally applied forces. Cantilevered sliding gates are given sufficient rigidity, in particular, by symmetrical construction of the bottom flange in relation to axes which lie in the plane of the gate member.

The essential support elements are two continuous longitudinal U-shaped profiles one of which is connected directly to the support and guide rail, the other reinforcing the part of the box profile which is directed towards the gate member. Furthermore, transverse webs are arranged perpendicular to the plane of the gate member and completely fill the cross section formed by the U-shaped profiles and are welded to the U-shaped profiles. The encasing outer walls are connected to the U-shaped profiles and the transverse webs so that the bottom flange has a honeycomb like structure.

While this structure makes the bottom flange sufficiently rigid however, the inherent weight of the gate is also quite considerable. In addition a large amount of welding work is needed to provide the connection between the outer side walls and the transverse webs which extend in width up to the outer walls.

The invention seeks to so design a sliding gate of the general type stated in the introduction that there can be reduction in the weight of the sliding gate while the flexural and torsion resistance of the bottom flange is maintained and the amount of welding work is, at the same time, reduced.

According to the invention, there is provided a sliding gate comprising a gate member with a bottom flange of box profile strengthened by longitudinal bracing elements between which are located transverse webs and which extend over and carry a roller support and guide rail wherein the side walls of the box profile have longitudinally extending inwardly projecting grooves to which the transverse webs extend, the transverse webs being connected to the side walls at the bottom of the grooves.

Preferably the bracing elements are U-shaped profiled elements and the grooves are of trapezoidal cross section.

The embodiment of the bottom flange as stated above makes it possible to use transverse webs which have a width which is much narrower than in known embodiments, i.e. narrower by twice the groove depth, so that there is a significant reduction in material required and in the weight. The connection of the groove base to the transverse webs nevertheless provides increased rigidity of the bottom flange and shorter weld seams despite the reduction in material.

Particularly good results with regard to rigidity are achieved if the transverse webs are formed as Ushaped profiles, their parallel limbs being connected to the groove base in each case. The tilting forces which occur with long gates can be absorbed more easily by a construction of the type mentioned above. By connecting the transverse webs to the groove base, trapezoidal or triangular profile like elements with a continuous cross section are formed their, length being determined, longitudinally of the gate, by the limbs of the profiled U-shaped transverse webs. These elements can be compared in effect to tubular profiled supports which are particularly suitable for the torsional loads which arise.At the same time, the proposed design measures also provide a better distribution of the forces in the bottom flange since the side walls take over the support functions to a large extent so that this also helps to strengthen the box profile with a smaller amount of material. Since the shaping of the side walls as well as the shaping of the grooves in the side walls can be carried out by bending, the shaping of the side walls in accordance with the invention does not necessitate higher manufacturing costs because of the additional tools required. The grooves therefore form continuous longitudinal channels which are accessible from outside at the same time, these channels being suitable as housings, for arranging inspection or marking elements or other installations, so that they are protected.

It is advisable if the U-shaped profiled elements are each retained by downwardly directed side limbs between the side walls of the box profile. As a result the arrangement of the trapezoidal grooves may be provided directly above the lower U-shaped profile or directly above the support and guide rail. At the same time, this arrangement of the U-shaped profiles strengthens the downwardly directed open portion of the side walls of the box profile.

In order to increase the stability of the gates still further it is advisable if the box profile member is reinforced in the region of the portion which remains, in the closed position, beyond the door opening, this portion extending over the roller support in its closed position, by additional longitudinal webs between the U-shaped profiled elements. In this way the gate is stabilized in shape in the region which is under particularly high load towards the end of the closed position.

The grooves in the side walls of the box profile may be equipped in preferred manner with profiled cladding members made of corrosion resistant material matched to the shape of the groove.

It is particularly advantageous if the grooves or the profiled cladding members are equipped with a light reflecting or fluorescent coating, more particularly a foil or film at least over the region of the groove base. These inspection or marking elements provided over the length of the gate serve to prevent accidents since they make it easier to see the position and in particular the movement of the gate as it opens and closes.

The profiled cladding elements may also be provided with lamps and associated installations and with light transmissive cover plates. As a result, the closed or closing gate is clearly visible even in the dark and when it is not irradiated. As compared to the known illumination devices for sliding gates which usually consist of an all round light placed at the end of the gate member the embodiment of the sliding gate mentioned above has an integrated continuous light strip without any projecting elements. This embodiment therefore makes a substantial contribution to accident prevention.

Furthermore the profiled cladding elements may be provided with light reflecting or fluorescent cover plates so that the safety requirements are fulfilled in this respect too.

It is advisable if the profiled cladding elements are hook-shaped at their free ends which run longitudinally of the gate. This shaping makes it possible to fix the light reflecting or light transmitting cover plates without difficulty by inserting them into the hook shaped ends longitudinally of the gate. If necessary the cover plates can be placed on from the front and fixed to profiled strips.

It is advisable if the lower edge of the profiled cladding elements are provided with apertures, for example with longitudinal slits arranged at spacings these longitudinal slits allowing any accumulated condensation or rainwater to run off.

The invention will now be described in greater detail, by way of example, with reference to the drawings, in which.

Figure 1 shows a partial side view of the sliding gate in accordance with the invention, partially in longitudinal section; Figure 2 shows a cross section of the bottom flange taken on the line A-A of Fig. 1; and Fig. 3 shows a detail of the sliding gate.

The side view of the gate as shown in Fig. 1 shows the portion which remains outside the gate opening and which extends over the roller support in its closed position.

The gate leaf 1 shown in Figs. 1 and 2 has a bottom flange 2 and an upper flange 3. The bottom flange 2 is equipped with a support and guide rail 4, 5 which faces the ground and which is connected to the U-shaped profile 6. The part 4 at the support and guide rail comprises in comparison to the part 5, a material of greater strength. A further U-shaped profile 7 is arranged above the U-shaped profile 6 and is connected via longitudinal webs 8 to the lower U-shaped profile 6. Transverse webs 9, which are also formed as U-shaped profiled members, serve to further reinforce the bottom flange.

The longitudinal webs 8 shown in Figs. 1 and 2 are only required in that portion of the gate which extends over the roller supports in the closed position because the greatest forces are applied to this portion of the gate in the closed position. In fact the longitudinal webs 8 may be provided over the entire length of the gate but they are only necessary in general in the above mentioned portion.

According to Fig. 2 the bottom flange is encased in outer walls 10, elements forming trapezoidal grooves 12 being welded into the parallel side walls 1 1 of the outer walls 10. The region of the groove base 13 is connected to the parallel limbs 14 of the U-shaped profiled transverse webs 9 and the bottom flange has a higher rigidity. In this solution, the long welded connections present in known bottom flanges, between the transverse webs and the side walls are avoided.

In the right hand part of Fig. 2, the grooves 12 are equipped over the region of the groove base 1 3 with a light reflecting or fluorescent coating 1 5 so that there is a type of continuous light band as soon as this coating is irradiated with light from outside.

In accordance with the left hand part of Figure 2, profiled cladding elements 16 made of corrosion resistant material are built into the grooves 12 of the profiled cladding elements 16, which comprise corrosion resistant material, which are matched to the shape of the grooves.

An example of such a profiled cladding element 16 is shown in Fig. 3. These profiled cladding elements 16 are provided for receiving lamps 17 and mounting 9.

Light transmissive cover plates 19 which are parallel to the side walls 11 of the bottom flange serve to protect these installation parts and lamps. There is therefore a continuous light band which runs longitudinally of the gate leaf its cover being capable of being matched to the respective requirements by suitable colouration of the cover plates 19.

A further possibility of shaping lies in dispensing with the lamps 17 in the profiled cladding elements 16 and using light reflecting cover plates 19 for this.

Regardless of the type of cover plates 19 they are retained in hook shaped ends 20 of the profiled cladding elements 16. According to Fig. 3 the cover plates 19 are inserted into the hook shaped ends 20 of the profiled cladding elements 16 in a longitudinal direction.

However it is also possible to implement at least one of the ends 20 of the profiled cladding elements 16 as a separate strip so that the cover plates 19 are inserted from the front and subsequently the strips are connected to the profiled cladding elements 16, for example in strap like fashion. Bores or slits 21 are arranged at spacings longitudinally of the gate on the lower hook shaped end 20 of the profiled cladding elements 16 and these bores or slits 21 make it possible for condensation and rainwater to run off.

Claims

1. A sliding gate comprising a gate member with a bottom flange of box profile strengthened by longitudinal bracing elements between which are located transverse webs and which extend over and carry a roller support and guide rail wherein the side walls of the box profile have longitudinally extending inwardly projecting grooves to which the transverse webs extend, the transverse webs being connected to the side walls at the bottom of the grooves.

2. A sliding gate according to claim 1, wherein the bracing elements are U-shaped profiled elements.

3. A sliding gate according to claim 2, wherein the grooves are of trapezoidal cross section.

4. A sliding gate according to claim 2 or 3, wherein the U-shaped profiled elements are each retained between the side walls of the box profile by downwardly directed side limbs.

5. A sliding gate according to claim 2, 3 or 4, wherein the box profile is given rigidity in the region of the portion which remains in the closed position beyond the gate opening, said portion extending over the roller support in its closed position, by additional longitudinal webs between the U-shaped profiled elements.

6. A sliding gate according to any one of the preceding claims wherein the grooves are equipped with a light reflecting or fluorescent coating over at least the region of the outwardly visible groove base.

7. A sliding gate according to claim 6, wherein the coating is in the form of a foil or film.

8. A sliding gate according to any one of claims 1 to 5, wherein the grooves are equipped with profiled cladding members matched to the shape cf the grooves and comprising a corrosion resistant material.

9. A sliding gate according to claim 8, wherein the profiled cladding elements are provided with lamps and with cover plates comprising a light transmissive material.

10. A sliding gate according to claim 9, wherein the profiled cladding elements are equipped with light reflecting or fluorescent cover plates.

11. A sliding gate according to any one of claims 8 to 10, wherein the profiled cladding elements are hook-shaped at their free ends longitudinally of the gate.

12. A sliding gate according to claim 1 1, wherein the lower hook-shaped end of the profiled cladding elements is provided with apertures.

13. A sliding gate substantially as described herein with reference to the drawings.