摘要:
Even when a damper is provided for absorbing impact and collision noise produced during winding a screen in an automatic winding screen device, the resistance during developing the screen is reduced as small as possible, and in the automatic winding screen device having a coil spring fixed to a bracket at one end of a winding box, the other end of the coil spring being fixed to a winding shaft, and the damper for alleviating the impact and collision noise, between the damper on a fixed shaft fixed to the winding box and the winding shaft, a one-way clutch mechanism is interposed in that when the winding shaft is rotated in a direction developing the screen against the rotational urging force of the coil spring, the connection between the damper and the winding shaft is cancelled while when the winding shaft rotates in a direction winding the screen, the damper is connected to the winding shaft.
摘要:
The invention concerns a device for guiding a counterweight of a flexible screen material handling rolling door for an industrial building comprising two opposite side posts (2, 3) linked by a winding drum (4) mechanically linked to one of the ends of a motor reducer-brake fixed in the upper part of the vertical post (2) and enabling the vertical movements of the flexible screen between an opening position and a closing position and to the opposite end of a pulley (9) provided in the upper part of the post (3) and linked via a purchase belt (10) to a counterweight (11), comprising in the vertical post (2) of the material handling rolling door (1) two guide cables (16, 17) stretched between the terminal points and co-operating with guiding elements (31) fixed on the counterweight (11) to enable to guide said counterweight in all its directions when it is vertically displaced.
摘要:
A window shade apparatus null101null utilizes a shade null107null spirally wrapped about a roller assembly null103null. A bottom rail null111null attached to the bottom end of the shade incorporates spring-biased brake assemblies engaged in longitudinal slots null115A, 115Bnull of side rails null117A, 117Bnull. The roller assembly uses a helical spring with a relatively large outer diameter, long compressed length and small wire diameter to provide relatively constant tension on the shade. The apparatus allows latchless positioning of the shade and is especially effective in windows having long lengths.
摘要:
An operator for a window or like shade serves to turn a shade roller to a new desired position as a result of a torque applied from a manually operable source, such as a chain operated wheel. The device includes a helical spring that is seated within a fixed bushing with its outer surface in contact with an inner cylindrical surface of the bushing. When torque is applied from the manually operable source, one overlapping end of the spring is moved away from its other end to reduce the spring diameter and hence release any frictional engagement of the spring with the bushing, thus allowing the torque to rotate the spring, which rotation is transmitted to the roller. However, when no such manually applied torque is present, the spring and the roller remain effectively locked in position. Any torque applied from the roller due to the weight of a partly lowered shade acts to tend to increase the spring diameter and thus to ensure a binding frictional engagement between the bushing and the spring.
摘要:
A method of manufacturing a control cord for use in a covering for architectural openings includes the steps of providing spools of high tensile strength and low abrasion characteristic yarns, tensioning the yarns and winding the yarns under tension on bobbins, placing the bobbins in a braiding apparatus and making an eight-carrier braid from the yarns on the bobbins, and passing the braided cord through a treatment apparatus where a urethane coating is applied to the yarns and heat cured.
摘要:
The invention concerns an elastic coupling device comprising a first cylindrical part (46), a second cylindrical part (47), at least partly tubular and enclosing the first part with its tubular part and provided with internal teeth (9), at least an elastic means (12) mounted inside the first part in a housing (11) and operating in substantially radial compression, at least a pinion (7) mounted in the first part and meshing with the teeth of the second part to drive a compression means (5) for the elastic means, the compression means consisting advantageously of a clamp. Said construction is particularly compact. Said device combined with rotation detecting means can constitute a torque sensor.
摘要:
Drive means comprising an electrical motor, a power supply unit and a transmission mechanism, said drive means being moveable between a first position and a second position and adjustable in these positions and in any position between these positions. The drive means (9) comprises at least one rail or plate part (25) extending at least partially in the longitudinal direction of the drive means, said rail or plate part being positioned near a first outer side of the drive means (9). Furthermore, an encapsulating part (30) for at least part of the drive means (9) is positioned with at least part of its surface near a second outer side of the drive means, and said rail or plate part (25) and said encapsulating part (30) are connected to each other in a heat-conducting connection. The invention also concerns a method of manual operation of a drive means and in particular a drive means for a screening device for a building opening, a door, a window or similar elements, said drive means or at least part of this being manually moveable from one operational mode to another mode, after which the drive means is manually moved back to the desired position of the drive means. In addition, the invention concerns a drive means and a screening device for applying this method.
摘要:
A method is disclosed of installing a barrier device at a passageway. The method includes attaching a barrier housing containing a retractable barrier to a structural element on one side of the passageway, extending the barrier a desired distance from the barrier housing, with the barrier so extended, setting an extension limit of the barrier to prevent subsequent extension of the barrier beyond the desired distance from the barrier housing and, with the extension limit set, retracting the barrier into the housing. The set extension limit can permit subsequent retraction and re-extension of the barrier up to the set extension limit.
摘要:
A trackless roll-up door covering to contain materials within, and prevent animals from entering, a building or enclosure having a large door opening. In one embodiment of the invention an open weave vinyl coated polyester moisture resistant quick drying fabric material is fixedly weighted at a first end and fixedly attached to a tubular assembly at a second end. The tubular assembly is rotated by rotatable drive means, such as a motor, hand crank, spring loaded mechanism, which extends the fabric when operated in a first direction and retracts the fabric when operated in a second direction. Strapping means are used to secure the fabric material when it is extended to loosely close cover the door opening. Additional strapping means are optionally used to further secure the fabric material and prevent bowing in the center of the extended material.
摘要:
In an emergency brake mechanism of the present invention, a rotation input shaft is increased in rotation speed by a planetary set-up gear to centrifuge weights, so that through the action of the centrifugal force of the weights, linings of the brake shoes are brought into press-contact with a fixed portion, to reduce rotation of the rotation input shaft, such that a large braking power is produced for a compact emergency brake mechanism.