755results about How to "Stable tension" patented technology

The invention discloses a reeling machine which comprises a rack assembly, an unreeling mechanism, a reeling mechanism, a feeding mechanism, a rubberizing device and a tension control mechanism, wherein the tension control mechanism comprises a pole piece deviation correcting device and a driving device which are arranged between the unreeling mechanism and the reeling mechanism; a reeling needle of the reeling mechanism performs a cam motion; the driving device is used for driving a pole piece to be synchronous with the traction of the reeling needle performing the cam motion to the pole piece and simultaneously preventing the unreeling of the pole piece and an deviation correcting operation from influencing the tension of the pole piece. According to the reeling machine, the stable tension control is effectively realized.

Disclosed herein is a door hinge structure for a refrigerator. The door hinge structure comprises an upper fixture unit which is screwed to a predetermined front upper portion of a refrigerator body, and has an upper hinge pin to be inserted in a top aperture formed at an upper surface of a refrigerator door, an upper hinge unit which is mounted on the upper surface of the door, and has a through opening for allowing a distal end of the upper hinge pin to be slidably inserted therethrough, the upper hinge unit being coupled with the upper fixture unit by making use of a torsion spring so that it is vertically spaced therewith, a lower fixture unit which is screwed to a predetermined front lower portion of the body, and has a lower hinge pin to be inserted in a bottom aperture formed, at a lower surface of the door, a lower hinge unit which is mounted on the lower surface of the door, and has a through opening for the insertion of the lower hinge pin, and a stopper member which is interposed between the lower fixture unit and the lower hinge unit and is adapted to stop pivotal movement of the door at least one time.

The invention provides a device for conveniently detecting and controlling tension of a metal wire in the wire drawing process, which is used for solving the problem of higher failure rate due to a severe working environment in the conventional tension detection and control device. The technical scheme is that: the front end of the wire drawing machine is provided with a wire unreeling wheel (1), and the tail end of the wire drawing machine is provided with a wire reeling wheel (2) using a variable frequency motor; variable frequency motors (3) are used by wire drawing units and wire reeling units; each wire drawing unit comprises a revolving drum (4), a frequency converter (5), a mechanical braking device and the like; an analog signal of a set speed is connected to a programmable logic controller (PLC) control unit and is output to the input end of the frequency converter (5) by the PLC control unit; meanwhile, an ultrasonic sensor (6) is arranged between every two wire drawing units; and the ultrasonic sensors (6) are used for transmitting corresponding data signals to serve as feedback signals for control according to variation in distances from transmitting ends and receiving ends of the ultrasonic sensors (6) to an object to be measured so as to adjust the rotation speeds of the variable frequency motors (3).

The disclosed device provides an improved mounting assembly for supporting elongated items or bundles against a support surface having a bore. The assembly provides a mount including an integrally formed flexible tie for retaining the items. The tie includes a hinge member to allow the tie to encircle the elongate items, to apply an even circumferential force against the items, and to align the items with the bore. The tie further includes an aperture having a pawl, which engages the flexible strap when it is inserted in the aperture to secure the elongate items. The device also includes a mounting stud having a plurality of branch rows, each row including a plurality of longitudinally spaced branches. The branches extend radially outwardly from a center section and each terminates in a distal end, with the distal ends of branches in adjacent branch rows defining an interrupted helical path.

The invention discloses a tension control system, which comprises a driving roller, a driven roller and a tension adjusting device, and is characterized in that in a closed-loop full automatic tension control system formed by a tension sensor on a position of a film, a tension converter, a special winding frequency converter, an electric motor, the driving roller, a group of driven rollers and the tension sensor on the position of the film; the tension sensor of the film, the tension converter and the special winding frequency converter are connected through signal wires in turn; the special winding frequency converter is connected with the electric motor through a cable; the electric motor is directly connected to the driving roller; and the driving roller and the driven rollers are connected by chain wheels. The tension control system adopts frequency conversion winding control technology to overcome the defects of the prior transmission mode, the tension on each position of a production line can be displayed intuitively, and the integral tension of the whole line can be adjusted. The tension control system can be widely applied to the transmission control of the production lines for processing aluminum foils, films, textiles, printing, plastics, and the like.

A bicycle rear derailleur is provided, which includes a base adapted to be mounted on a bicycle frame, a movable member, a linkage assembly pivotally connected to and between the base and the movable member, a pivot shaft provided within and pivotally rotatable relative to the movable member, a chain guide fixed to an end of the pivot shaft, a restriction assembly provided on the pivot shaft, and a friction assembly provided within the movable member to provide a rotational friction on the restriction assembly. Whereby, the chain guide is pivotally awing toward a first direction by a force; when the chain guide swings toward a second direction which is opposite to the first direction by another force, it is forced by a swing resistance.

The invention discloses a composite material uncoiling centering adjustment device with a damping function. A rotating central spindle is mounted on an uncoiling support through a pair of deep groove ball bearings in a double-bearing bearing seat. The rotating central spindle is provided with a centering shaft sleeve and a centering adjusting central shaft which are concentric, the centering shaft sleeve and the centering adjusting central shaft are provided with conical faces which are the same, and the distance of the centering shaft sleeve and the centering adjusting central shaft is adjustable, so that a coiling block and the rotating central spindle are concentrically fixed. The other end of the rotating central spindle is provided with a friction drum which is provided with a damping belt in a winding mode, one end of the damping belt is fixedly connected with the uncoiling support, and the other end of the damping belt is connected with a hook head of an adjusting hook. The cylinder end of the adjusting hook is connected to a damping support through an adjusting spring and an adjusting nut, and the tension of uncoiling can be changed by adjusting the adjusting nut. A rotating detecting piece is fixed on the end face of a friction wheel, the detecting end of a proximity sensor directly faces the extending end of the proximity sensor, and whether composite materials are broken is judged by detecting variation of received signals. The composite material uncoiling centering adjustment device has the advantages of being suitable for composite material coiling blocks of different specifications and adjustable in tension in the uncoiling process, and having the function of detecting breakage.

The present invention provides a printing device which provides high printing quality. The printing device includes: an image forming section which has a thermal head 9 and a platen roller 12; a media conveyance section for conveying an intermediate transfer film F; a ribbon conveyance section for conveying an ink ribbon R; a sensor 10 for detecting a first mark formed on the film F; and a control section for controlling the image forming section, the media conveyance section, and the ribbon conveyance section in accordance with output information from the sensor 10. The control section presses the head 9 into contact with the roller 12 when the first mark is not detected, which is when the first mark is further upstream than the position of the sensor 10, while the film F and the ribbon R are being conveyed, and selectively heats a heating element formed in the head 9 when the film F is positioned in the printing start position, which is a state in which the first mark is detected when the first mark is further downstream than the position of the sensor 10.

The present invention provides a printing device which provides high printing quality. The printing device includes: an image forming section which has a thermal head 9 and a platen roller 12; a media conveyance section for conveying an intermediate transfer film F; a ribbon conveyance section for conveying an ink ribbon R; a sensor 10 for detecting a first mark formed on the film F; and a control section for controlling the image forming section, the media conveyance section, and the ribbon conveyance section in accordance with output information from the sensor 10. The control section presses the head 9 into contact with the roller 12 when the first mark is not detected, which is when the first mark is further upstream than the position of the sensor 10, while the film F and the ribbon R are being conveyed, and selectively heats a heating element formed in the head 9 when the film F is positioned in the printing start position, which is a state in which the first mark is detected when the first mark is further downstream than the position of the sensor 10.

Modular inflatable cover for buildings, comprising separate coaxial conduits (30) secured together by tensionable link (50) and fluid-connected by coaxial inflatable tube (24). Tube (24) securely embraces sliders (32) that in turn closely but freely embrace conduits (30). Sliders (32) are urged by springs (34) to keep tube (24) taught. Elastic cinctures (26) on tube (24) and springs (34) tensionably cooperate against inflation means to provide reliable control of openings between adjacent modules in an assembly. Conduits (30) are securely torqued to ground anchors (40) by coupling (42). End covers (44) and sliders (32) are provided to compensate for and facilitate length shrinkage of tube (24), upon inflation. The present invention provides a variable cover with integral support that is uniquely capable of exploiting canyons and other ground depressions for an unprecedented scale of environment control. Applications include greenhouses, shutters, insulation and shelters.

The invention relates to a slip motor automatic control device. The device comprises a slip motor, a tension signal acquisition device and a slip motor controller, wherein the tension signal acquisition device is used for converting the tension expanded when materials are processed into a tension signal; and the slip motor controller is used for comparing the tension signal with the preset normal value and automatically controlling the slip motor according to the comparison result. The device adopts the closed loop tension automatic control mode, and sets the normal value according to the characteristics of the materials; and when a tension senor detects a tension error of the materials, the voltage and the current needed by the slip motor are automatically regulated and outputted after automatic comparison, so that the automatic circulation functions of target determining, automatic detection, automatic comparison and automatic regulation are achieved.

The invention relates to a low-carbon wire rewinding shaft device, in particular to a low-carbon wire constant tension rewinding shaft device. The low-carbon wire constant tension rewinding shaft device structurally comprises a flexible damping payoff mechanism, a constant speed traction mechanism, a tension control mechanism and a plastic finished product bobbin, wherein the flexible damping payoff mechanism, the constant speed traction mechanism, the tension control mechanism and the plastic finished product bobbin are arranged in the running direction of a rewound wire. According to the low-carbon wire constant tension rewinding shaft device, the take-up speed can be regulated to stabilize tension according to a tension change represented by the specification and strength of the wire, so that the phenomena of circle swinging, wire clamping and tightness non-uniformity of the rewound wire are avoided, and the quality of a product is greatly improved.

Modular inflatable cover for buildings, comprising separate coaxial conduits (30) secured together by tensionable link (50) and fluid-connected by coaxial inflatable tube (24). Tube (24) securely embraces sliders (32) that in turn closely but freely embrace conduits (30). Sliders (32) are urged by springs (34) to keep tube (24) taught. Elastic cinctures (26) on tube (24) and springs (34) tensionably cooperate against inflation means to provide reliable control of openings between adjacent modules in an assembly. Conduits (30) are securely torqued to ground anchors (40) by coupling (42). End covers (44) and sliders (32) are provided to compensate for and facilitate length shrinkage of tube (24), upon inflation. The present invention provides a variable cover with integral support that is uniquely capable of exploiting canyons and other ground depressions for an unprecedented scale of environment control. Applications include greenhouses, shutters, insulation and shelters.