摘要:
A brake device (1) for a cable-operated door (3) operated by a tension cable (5), being mountable onto the cable-operated door (3) and configured for cooperating with the tension cable (5) so as to immobilize the cable-operated door (3) with respect to the fixed structure (7) by means of a braking arm (19) in the event of a loss of tension in the cable (5), the brake device (1 ) being improved in that it is provided with an anti-theft mechanism (67) including a catcher assembly (69) and a protrusion (71) operatively projecting from the braking arm (19). The catcher assembly (69) is operatively connectable to the fixed structure (7) and the protrusion (71) is shaped, positioned and sized with respect to the catcher assembly (69) so as to be engaged with the catcher assembly (69) when the braking arm (19) is operated into the engaged configuration caused by a given loss of tension in the cable (5), thereby preventing the cable-operated door (3) from being displaced upwardly along the fixed structure (7) as a result of the catcher assembly (69) abutting against the protrusion (71 ) of the braking arm (19).
摘要:
A chain guide for guiding a chain within a chain hoist. The chain guide includes a substantially elongated body having an inner side and an outer side, along with first and second extremities. The substantially elongated body is made of a substantially flexible material for curving the substantially elongated body into a substantially arched configuration about a given wheel of the chain hoist. The chain guide also includes first and second chain receiving portions provided adjacent to the first and second extremities respectively of the substantially elongated body, on the inner side thereof. Each chain receiving portion comprises a pair of shoulders protruding from the inner side of the body and defining an open channel shaped and sized for slidably receiving a portion of the chain. The chain guide also includes a deformable Connecting portion for interconnecting the first and second chain receiving portions of the chain guide. Also described is a chain hoist provided with the chain guide.
摘要:
A braking device (1) configured for use with the counterbalancing system (3) of a garage door. The brake device (1) includes a support bracket (11), a ratchet wheel (13), a pawl arm (15), and a biasing spring (49). The support bracket (11) is rigidly connected to a fixed structure and has a guiding slot (45). The ratchet wheel (13) is securely mounted about the overhead shaft (5) of the counterbalancing system (3) and has at least one notch (23). The pawl arm (15) has first and second ends (25,27), the first end (25) of the pawl arm (15) being pivotally connected to the support bracket (11) and the second end (27) of the pawl arm (15) cooperating with the guiding slot (45) and being movable with respect to the support bracket (11) along said guiding slot (45). The first and second ends (25,27) of the pawl arm (15) are further connected to flanges (29) of a plug (7) on either side of the overhead shaft (5). The biasing spring (49) is operatively connected between the support bracket (11) and the pawl arm (15) so as to exert a biasing force for biasing the pawl arm (15) towards the ratchet wheel (13). The pawl arm (15) is devised so that, an element (31) thereof is adjacent to the ratchet wheel (13), said element (31) being shaped and sized to be removably insertable into at least one notch (23) of the ratchet wheel (13) so as to block rotation of the ratchet wheel (13), and thus block rotation of the overhead shaft (5), in the event of a failure of the counterbalancing system (3) of the door. The brake device (1) further includes a shear pin (53) operatively connectable between the support bracket (11) and the pawl arm (15) for maintaining said pawl arm (15), prior to installation of the brake device (1) onto the counterbalancing system (3), in an intermediate configuration between the first and second configurations. The shear pin (53) is made of a specific material being breakable when the pawl arm (15) is rotated with respect to the support bracket (11) when the torsional force of the torsional spring (9) transmitted to said pawl arm (15) via the plug (9) has reached a predetermined value, ensuring namely that a predetermined minimal amount of load is present is said torsional spring (9) for counterbalancing purposes.
摘要:
A braking device (1) configured for use with the counterbalancing system (3) of a garage door. The brake device (1) includes a support bracket (11), a ratchet wheel (13), a pawl arm (15), and a biasing spring (17). The support bracket (11) is rigidly connected to a fixed structure and has a guiding slot (45). The ratchet wheel (13) is securely mounted about the overhead shaft (5) of the counterbalancing system (3) and has at least one notch (23). The pawl arm (15) has first and second ends, the first end of the pawl arm (15) being pivotally connected to the support bracket (11) and the second end of the pawl arm (15) cooperating with the guiding slot (45) and being movable with respect to the support bracket (11) along said guiding slot (45). The first and second ends of the pawl arm (15) are further connected to flanges of a plug (7) on either side of the overhead shaft (5). The biasing spring (17) is operatively connected between the support bracket (11) and the pawl arm (15) so as to exert a biasing force for biasing the pawl arm (15) towards the ratchet wheel (13). The pawl arm (15) is devised so that, an element (31) thereof is adjacent to the ratchet wheel (13), said element (31) being shaped and sized to be removably insertable into at least one notch (23) of the ratchet wheel (13) so as to block rotation of the ratchet wheel (13), and thus block rotation of the overhead shaft (5), in the event of a failure of the counterbalancing system (3) of the door. The brake device (1) further includes a locking assembly configured to cooperate with the ratchet wheel (13) so as to securely mount the same onto the overhead shaft (5) and thus prevent the ratchet wheel (13) from being displaced along a longitudinal axis (5a) of the overhead shaft (5).
摘要:
A cable failure device for a cable-operated door operated by a tensioned cable, the cable-operated door having a movement guided along a fixed structure, such as a guide rail. The cable failure device is configured for cooperating with the tensioned cable so as to immobilize the cable-operated door with respect to the fixed structure in the event of a loss of tension in the cable. The cable failure device included a support bracket for mounting the cable failure device onto the door, a guiding assembly operatively mounted for guiding the movement of the door along the fixed structure, and a braking assembly operatively mounted onto the support bracket, and operable between a rest position where the guiding assembly is allowed to guide the door along the fixed structure, and an operable position triggered by a given loss of tension detected in the tension cable where the braking assembly engages a portion of the fixed structure for braking movement of the cable-operated door with respect to the fixed structure. The cable failure device also includes a safety arm operatively connected to the braking assembly and cooperating with the tensioned cable so as to detect the given loss of tension. The safety arm is operable between a safety configuration where it is positioned over at least one fastener of a corresponding hole of the support bracket when there is still a given tension in the tensioned cable, for preventing a user from removing the support bracket from the door, and a retracted configuration where the safety arm is positioned away from the fastener when the given tension is no longer present in the cable, thereby enabling the user access to the fastener. Thus, the cable failure device is configured for immobilizing the door in the event of a loss of tension and for preventing a user from removing the device from the door when there is still tension in the cable.
摘要:
A chain guide for guiding a chain within a chain hoist. The chain guide includes a substantially elongated body having an inner side and an outer side, along with first and second extremities. The substantially elongated body is made of a substantially flexible material for curving the substantially elongated body into a substantially arched configuration about a given wheel of the chain hoist. The chain guide also includes first and second chain receiving portions provided adjacent to the first and second extremities respectively of the substantially elongated body, on the inner side thereof. Each chain receiving portion comprises a pair of shoulders protruding from the inner side of the body and defining an open channel shaped and sized for slidably receiving a portion of the chain. The chain guide also includes a deformable Connecting portion for interconnecting the first and second chain receiving portions of the chain guide. Also described is a chain hoist provided with the chain guide.
摘要:
A plug for operatively connecting a torsion spring onto a corresponding component of a counterbalancing mechanism of a door assembly. The plug includes a connecting portion for removably connecting the plug onto the corresponding component, a substantially cylindrical collar insertable into an end portion of the torsion spring, an anchoring portion disposed on a bottom section of the collar for cooperating with a coil of the end portion of the torsion spring so as to pivotally anchor the collar onto the end portion of the torsion spring, and a clip projecting from a top section of the collar, and being disposed at a location on the collar substantially diametrically opposite from where the anchoring portion is disposed on the bottom section of the collar. The clip is shaped and sized for clasping past an end coil of the torsion spring and operatively engaging with the same