摘要:
A yarn setting device and method for a draw-texturing machine for permitting a yarn-setting work not requiring a worker to stoop down when threading across a worker passage. A main machine frame (20) provided with a twisting machine (5) and a second heater (13) and a winder frame (22) provided with winders (10) are installed with a worker passage (21) therebetween, and a yarn (Y) from the second heater is guided along the worker passage for guiding to winders on the winder frame. A threading slit (13a) is formed in the second heater (13) and a sectionally-spiral guide pipe member (34) formed with a yarn removing slit (34a) is provided in the vicinity of the threading slit (13a). An expandable yarn guide pipe (41) and movable fourth yarn feed roller device (7) are provided along the worker passage (21). Yarn feed pipes (51) each equipped with a yarn feed nozzle (51a) is provided between the expansion end of the yarn guide pipe (41) and winders (10).
摘要:
A hydraulic drive apparatus in which a hydraulic pressure motor (42,43) is driven and rotated depending on an operation position entered from an operation lever (21). An oil pressure control circuit (23) receives pressures of operation oils which are detected by pressure gauges, and capable of driving the hydraulic pressure motor (42,43) to rotate, and a pressure of an operation oil which is detected by a pressure gauge (46), the operation oil being supplied from a hydraulic pump to a directional control valve (25). Then, the oil pressure control circuit varies a set pressure of a main relief valve in a manner that it feeds current to an electromagnetic relief valve and varies a set pressure of an electromagnetic relief valve. As a result, the oil pressure control circuit carries out such a control that a pressure of an operation oil received from the hydraulic pump is higher than a pressure of an operation oil for driving and rotating the hydraulic pressure motor (42,43) by a predetermined pressure.
摘要:
A stereolithographic method which comprises irradiating the surface (5) of a photohardenable resin composition with light (1) through an image drawing mask (3) capable of changing its mask image with the image drawing mask being moved in parallel to the surface of the photohardenable resin composition and the mask image of the image drawing mask being changed in synchronism with the movement of the image drawing mask according to the sectional shape pattern on the photohardened resin layer to be formed to form a photohardened resin layer having a predetermined sectional shape pattern and a stereolithographic apparatus therefor.
摘要:
Herein disclosed is a robot arm mechanism (100) comprising a first arm link mechanism (110) and a second arm link mechanism (120), a robot arm driving mechanism 130 for driving the first arm link mechanism (110) and the second arm link mechanism (120), and a link retaining mechanism (140) for pivotably retaining the first arm link mechanism (110) and the second arm link mechanism (120), in which a third arm link (113) and a fourth arm link (114) of the first arm link mechanism (110) are kept forward in a first rotation direction (130a), in which the first arm link mechanism (110) and the second arm link mechanism (120) are extended, thereby enabling to prevent the quadric crank chain constituting the robot arm mechanism (100) from being flattened out while the first arm link mechanism (110) and the second arm link mechanism (120) are extended, and improving resistance to deformation, in comparison with the conventional robot arm mechanism (900).
摘要:
If a hydraulic motor (23) (travelingwheel (27)) is rotated (or skidding) at high rate, and a hydraulic motor (24) is hardly rotated, a detection controller (68) compares the rotational speeds of both hydraulic motors (23, 24). Then the rotation detected by the rotation detectors (66, 67) to detect the traveling wheel (27) to be skidding, and moves a piston (71) to allow a negative brake (40) to give a braking force to the hydraulic motor (23), and rotate the hydraulic motor (24). In this way, this invention can release the traveling wheel from skidding without the use of a flow dividing valve.
摘要:
In screw rotors (21, 22) which are each provided with a screw tooth (211, 221) having a spiral addendum surface portion (211a, 221a) and a deddendum surface portion (211c, 221c), and are used as a pair of male and female, between the addendum surface portion (211a, 221a) and deddendum surface portion (211c, 221c) of the screw tooth (21.1, 221), there is provided the pitch circumference portion (211p, 221p) which forms a predetermined angle range of circular arc having a definite radius rp on an optional transverse cross section, and the radius of the pitch circumference portion (211p, 221p) is set such that, when the opposing rotors are meshed with each other, out of the meshing . clearances between the male and female screw teeth (211, 221), the clearance g1 between the pitch circumference portions (211p, 221p) becomes smaller than the clearances g2, g3, g4 between the other portions.
摘要:
If a hydraulic motor (23) (travelingwheel (27)) is rotated (or skidding) at high rate, and a hydraulic motor (24) is hardly rotated, a detection controller (68) compares the rotational speeds of both hydraulic motors (23, 24). Then the rotation detected by the rotation detectors (66, 67) to detect the traveling wheel (27) to be skidding, and moves a piston (71) to allow a negative brake (40) to give a braking force to the hydraulic motor (23), and rotate the hydraulic motor (24). In this way, this invention can release the traveling wheel from skidding without the use of a flow dividing valve.