ES1259308U - BLIND DOOR (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Shutter door, comprising a panel (1) for closing the opening, which can be rolled onto an upper collection roller (2) actuated by a motor or crank, characterized in that the collection roller (2) is connected by a belt or chain (5) to a parallel compensating shaft (4) for coordinated rotation, the compensating shaft (4) having a series of springs (6) configured to be loaded in the closing position of the cloth (1) and with less load in the opening position of the cloth (1). (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Shutter door

TECHNICAL SECTOR

The present invention refers to a shutter door, of the type that comprises a sheet made of slats or resistant canvas, with a collection system that reduces the effort in the movements of the sheet. Consequently, it is especially applicable to large span doors.

STATE OF THE ART

Roller shutter or roller doors comprise a sheet, cloth or fabric that can sometimes be very heavy. For this reason, some are driven by slow hoists or powerful gearmotors that have a high energy consumption and cost. This implies that an electrical fault also prevents the door from opening. As an alternative, a manual opening with a very high ratio is provided to overcome that weight, so manual opening or closing requires a large number of turns of the crank.

The applicant does not know of any solution to these problems as effective as the one claimed.

BRIEF EXPLANATION OF THE INVENTION

The invention consists of a shutter door according to the independent claim.

It is a door that comprises one or more force compensating shafts, formed by springs connected to the door's pick-up roller or shaft, facilitating the maneuverability of this type of door. The door, regardless of its starting weight, becomes an easy, fast and safe maneuvering door for anyone.

This innovation is applicable to all vertical roll-up doors with a horizontal axis at the top, but especially for community garages and for industries. If a suitable gearmotor is available, the operating mode is constant without stopping due to heating and always of low cost and consumption. On the other hand, if It has a manual system, the multiplication ratio can be reduced so it is simple and fast to act.

The shutter door comprises a panel for closing the opening, which can be rolled on an upper take-up roller actuated by a motor or crank. The take-up roller is connected by a belt or chain to at least one parallel compensating axis for the coordinated rotation of both. The compensating shaft has a series of springs configured to be loaded in the closing position of the cloth, and with less load in the opening position of the cloth. That is, the spring tries to return the load by lifting the cloth, which is equivalent to offsetting its weight, at least partially.

The motor or the crank is generally connected to the take-up roller by means of a multiplier transmission, which can be of lower ratio due to the presence of the compensating shaft.

In turn, the belt or chain can be coupled to pulleys or multiplier gears, so that the rotation speed of the take-up roller is not identical to that of the compensating shaft.

In the most preferred embodiment, the compensating shaft is formed by an inner shaft connected to the belt or chain and rotating within fixed supports. The springs are connected to the inner shaft at one end and to the supports at the other.

This inner shaft is preferably similar in length to the take-up roller and comprises springs along its entire length. Thus, tapes or chains can be arranged at one or both ends. In addition, by fitting more springs, they can be of lower power, reducing costs, balance shaft radius and increasing reliability.

Other particular solutions are included in the dependent claims and are described in detail below.

DESCRIPTION OF THE DRAWINGS

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, a set of drawings is attached in which, with an illustrative and non-limiting nature, the following has been represented.

Figure 1: Schematic perspective view of an embodiment.

MODES OF EMBODIMENT OF THE INVENTION

Next, an embodiment of the invention will be briefly described, as an illustrative and non-limiting example thereof.

Figure 1 shows a diagram of a door according to the invention, in which a sheet, fabric or cloth (1) has been represented, generally made of horizontal metal slats crimped into each other and that can be wound on a pick-up roller. (2) top of the shutter. The rotary movement of the pickup roller (2) to pick up the cloth (1) can be manual or by a motor. If the door has several bays, each will have its own set of cloth (1), horizontal pickup roller (2) and motor or crank.

The motor or the crank can be connected to the take-up roller (2) by means of a transmission, for example a gearbox thanks to different sized pinions. The preferred transmission comprises a chain, and a method of maintaining tension, such as an adjustable position pulley.

The system comprises a compensating shaft (4), arranged parallel to the pickup roller (2) and connected at one end to it thanks to a belt or chain (5) to ensure that the rotation of both elements, the pickup rollers (2) and compensating shaft (4) is coordinated. The compensating shaft (4) can be arranged on either side, as long as the connection between both elements is maintained. The chain (5) can be arranged in pulleys or gears (6) of different size to realize a multiplication or reduction ratio. The compensating shaft (4) acts as a force compensator and comprises a series of springs (6) or springs.

The compensating shaft (4) is formed by an inner shaft (41) that rotates actuated by the chain (5) or belt and a series of supports (42) fixed and attached to the structure of the door (not shown). The springs (6) are attached on one side to the inner shaft (41) and on the other to the supports (42), so that each support (42), except if the ends, have a spring (6) to each side. It is preferable to use more springs (6) of lower force to increase their durability, and increase the reliability of operation. The breaking of a spring (6) does not affect the door.

The connection of the springs (6) to the inner shaft (41) is carried out by means of rings (43) that hold the corresponding end of the spring in respective holes with clamping studs. The rings (43) preferably have several holes distributed along their bases, and the springs (6) may be attached to any of them. In this way, it is possible select the hole where each end of the springs (6) will be attached by means of the studs. This allows the installer to modify the tension of each pair of springs (6), preloading them. Thus, it consequently modifies the total compensation made by the compensating shaft (4).

In use, the springs (6) are arranged on the compensating shaft (4) in such a way that they exert an upward force on the cloth (1) when transmitted to the take-up roller (2). That is, the springs (6) are unloaded, or with less load, when the cloth (1) is arranged around the take-up roller (2).

Claims (1)

1- Shutter door, which comprises a panel (1) to close the opening, which can be rolled onto an upper collection roller (2) actuated by a motor or crank, characterized in that the collection roller (2) is connected by a tape or chain (5) to a parallel compensating shaft (4) for coordinated rotation, the compensating shaft (4) having a series of springs (6) configured to be loaded in the closing position of the cloth (1) and with less load in the cloth opening position (1). 2- Door, according to claim 1, characterized in that the motor or the crank are connected with the pick-up roller (2) by means of a multiplier transmission. 3- Door, according to claim 1, characterized in that the belt or chain (5) is coupled to pulleys or multiplier gears. 4- Door, according to claim 1, characterized in that the compensating shaft (4) is formed by an inner shaft (41) connected to the belt or chain (5) and rotating inside some supports (42), the springs ( 6) connected to the inner shaft (41) at one end and to the supports (42) at the other. 5- Door, according to claim 4, characterized in that the inner shaft (41) is of similar length to the pick-up roller (2) and comprises springs (6) along its entire length. 6- Door, according to claim 4, characterized in that the inner shaft (41) is attached to the springs (6) by means of rings (43). 7- Door, according to claim 4, characterized in that the springs (6) are helical springs. 8. Door, according to claims 6 and 7, characterized in that the rings (43) comprise a series of holes in their bases, and the springs (6) are configured to be fixed in any of them.