Abstract: A system server and access points are connected through a LAN preferably on the ground. A control cycle is divided into an instruction time zone to provide instructions from the access points to traveling vehicles, and a report time zone to provide reports from the traveling vehicles to the access points. The access points transmit target positions in the instruction time zone, and the traveling vehicles report positions in the report time zone. The system server determines target positions based on the reported positions.

Abstract: A system server and access points are connected through a LAN preferably on the ground. A control cycle is divided into an instruction time zone to provide instructions from the access points to traveling vehicles, and a report time zone to provide reports from the traveling vehicles to the access points. The access points transmit target positions in the instruction time zone, and the traveling vehicles report positions in the report time zone. The system server determines target positions based on the reported positions.

Abstract: Linear sensors are provided in two rows along a moving route of a moving body. A relative position of a magnet provided in the moving body relative to the linear sensor is determined, and an origin coordinate of the linear sensor is added to the determined relative position to determine an absolute position of the moving body.

Abstract: An ID tag describing control data on a stopped position for each station 10, movement required for a transfer, and the like is installed in front of the station 10. An overhead vehicle 8 reads the control data and uses it for stoppage and transfer. The overhead vehicle 8 need not store the stoppage or transfer control data for each station 10. Further, the control data can be changed without updating the storage in the overhead vehicle 8.

Abstract: A dog 10 is placed in front of each stop position 8 to notice an overhead running vehicle 20 that ID tag data is to be read. A bar code reader 24 reads the ID tag data to determine the stop position based on a mark reference. The absolute position of an overhead running vehicle 20 with respect to the mark 14 is determined. The overhead running vehicle 20 decelerates and stops at a target position. According to the present invention, the overhead running vehicle 20 can stop without creep running.

Abstract: Linear sensors are provided in two rows along a moving route of a moving body. A relative position of a magnet provided in the moving body relative to the linear sensor is determined, and an origin coordinate of the linear sensor is added to the determined relative position to determine an absolute position of the moving body.

Abstract: An overhead running vehicle 10 uses an absolute position sensor or an encoder to detect its own position. The overhead running vehicle 10 then reports its own position and state to a system controller 14 via a communication line also used as an electricity feeding line. Further, the overhead running vehicle 10 intercepts reports from other overhead running vehicles 10 to avoid collisions or deadlocks. The system controller 14 and each overhead running vehicle 10 can determine the positions and state of other overhead running vehicles 10. This enables the system to be efficiently operated.

Abstract: A guided vehicle controller 20 transmits the standard time to a guided vehicle 14. The guided vehicle 14 reports a coordinate representing the current position and the transmission time to the controller 20. The controller 20 generates time series data obtained by combining the transmission time and the coordinate. Based on the time series data, the current coordinate of the guided vehicle is estimated. By converting current coordinates of a plurality of guided vehicles into the distribution of guided vehicles, instructions about the travel routes are provided to the guided vehicles for congestion avoidance. Further, a suitable guided vehicle capable of efficiently executing a transportation command is selected, and the transportation command is assigned to the selected guided vehicle.

Abstract: A dog 10 is placed in front of each stop position 8 to notice an overhead running vehicle 20 that ID tag data is to be read. A bar code reader 24 reads the ID tag data to determine the stop position based on a mark reference. The absolute position of an overhead running vehicle 20 with respect to the mark 14 is determined. The overhead running vehicle 20 decelerates and stops at a target position. According to the present invention, the overhead running vehicle 20 can stop without creep running.

Abstract: An ID tag describing control data on a stopped position for each station 10, movement required for a transfer, and the like is installed in front of the station 10. An overhead vehicle 8 reads the control data and uses it for stoppage and transfer. The overhead vehicle 8 need not store the stoppage or transfer control data for each station 10. Further, the control data can be changed without updating the storage in the overhead vehicle 8.

Abstract: An overhead running vehicle 10 uses an absolute position sensor or an encoder to detect its own position. The overhead running vehicle 10 then reports its own position and state to a system controller 14 via a communication line also used as an electrcity feeding line. Further, the overhead running vehicle 10 intercepts reports from other overhead running vehicles 10 to avoid collisions or deadlocks. The system controller 14 and each overhead running vehicle 10 can determine the positions and state of other overhead running vehicles 10. This enables the system to be efficiently operated.

Abstract: A plurality of reflectors are disposed along a travelling path, an automatic guided vehicle is started up at a position where a laser scanner can recognize four or more reflectors, and data on the angles and distances of the reflectors is obtained. When the first reflector is recognized, there are N possible hypotheses that would specify the reflectors. When a second reflector is recognized, the distance to the first reflector is rational, therefore, there are kN possible hypotheses (k is 10 or less). When a third reflector is recognized, the triangle formed by the three reflectors cioncides with that on a reflector map, therefore, there are mN possible hypotheses (m<1). Then, the present position is estimated according to mN possible hypotheses. The fourth reflector is recognized and the conformity is checked, the present position of the automatic guided vehicle is specified.

Abstract: A laser scanner recognizes reflectors arranged along a travelling path. A reflector having an angle or a distance falling within an allowable range relative to the last specified reflector is determined to be the same as the previous specified reflector. Based on the locational relationship between such reflectors and those having an angle or a distance outside the allowable range, the reflectors are specified by referencing a reflector map. The reflectors can be specified without assuming the present position of an automatic guided vehicle.

Abstract: In an operation for winding a synthetic thread on a cylindrical bobbin for producing a full size yarn package at a winding speed more than 2500 m/min, the possible creation of defective yarn winding is positively prevented by increasing the tightness of the winding thread on a just previously formed thread layer of the yarn package, at least once in a predetermined period defined by a critical condition. Such predetermined period is defined by1.20.times.10.sup.-6 .ltoreq. (dw/dt)/D .ltoreq. 3.0.10.sup. -6wherein w represents the number of bobbin rotations per one reciprocal traverse motion, t represents the time in minutes and D represents the thickness of the thread in denier. The above-mentioned winding tightness is created by intentionally increasing the winding yarn tenson and/or increasing the contact pressure of the yarn package with a friction driving roller.

Abstract: Textured polyester multifilament yarns usable for producing knitted or woven fabrics having a desirable dyeing property but no objectionable appearance of local glitter, are prepared, with high efficiency, by simultaneously drawing and false-twist texturing an undrawn polyester multifilament feed yarn composed of a plurality of polyester filaments each having a multilobal cross-sectional profile having 5 to 10 lobes projected radially with substantially equal angular intervals therebetween about the center of the filament, the cross-sectional profile satisfying the relationship (1)1.05 .ltoreq. R.sub.1 /R.sub.0 .ltoreq. 1.16 (1)wherein R.sub.0 is the radius of an imaginary circle inscribed within the cross-section around the center of the filament and R.sub.1 is the radius of another imaginary circle circumscribed about the tips of at least half the total number of the lobes, around the center of the filament.

Abstract: In a spinning apparatus for producing synthetic threads providing with at least one spinning unit comprising a spinneret, a spinning duct disposed below the spinneret and a take-up device mounted on a base floor below the spinning duct, wherein a work space for carrying out the threading operation is provided in front of the take-up device, a hand-held suction gun for taking up a thread at the time of the threading operation is installed in the above-mentioned threading space. A compressed air supply conduit connected to the suction gun and a conduit for exhaust air from the suction gun are held in a container in such a condition that they are capable of being freely pulled out therefrom and pulled thereinto.

Abstract: Draw-texturing for synthetic fibers is efficiently carried out by means of a draw-texturing apparatus having a novel arrangement and construction wherein the draw-false-twisting body proper is arranged through and beyond an intermediate floor. Package supply means are located on said intermediate floor in opposing relation in the upper portion of said body proper, a first operational floor is formed between said package supply means and the upper portion of said body proper, take-up means are placed on the apparatus base floor in opposing relation in the lower portion of said body proper and a second operational floor having yarn passages underneath is formed between the lower portion of said body proper and said take-up means.