Manufacturing method and manufacturing device for bundle product

Abstract

Provided is a manufacturing method for a bundle product that includes an inspecting step of inspecting two or more threads continuously running in parallel in the longitudinal direction, a collecting step of collecting the threads, and a cutting step of cutting, after completion of the collecting, all the collected threads at a predetermined position, to obtain a bundle product having plural threads converged into a bundle. In the manufacturing method, an amount of collection in the collecting step is adjusted on the basis of inspection results obtained in the inspecting step so that at least one managed quantity for plural threads selected from a group including a total number, a total weight, a representative weight, a total outside diameter value, a representative outside diameter value, a total surface area, and a representative surface area of the plural threads constituting the bundle product exceeds a predetermined value.

1 . A manufacturing method for a bundle product, comprising the steps of:
 inspecting two or more threads continuously running in parallel in a longitudinal direction;   collecting the threads; and   cutting, after completion of the collecting, all the collected threads at a predetermined position, to obtain a bundle product having a plurality of threads converged into a bundle, wherein   an amount of collection in the collecting step is adjusted on the basis of inspection results obtained in the inspecting step so that at least one managed quantity for a plurality of threads selected from a group including a total number, a total weight, a representative weight, a total outside diameter value, a representative outside diameter value, a total surface area, and a representative surface area of the plurality of threads constituting the bundle product exceeds a predetermined value.   
     
     
         2 . The manufacturing method for a bundle product according to  claim 1 , wherein
 the collecting step is a winding and collecting step of collecting the threads during rotation.   
     
     
         3 . The manufacturing method according to  claim 1 , wherein
 the collecting step is a cutting and collecting step of collecting the threads while cutting the threads to a certain length.   
     
     
         4 . The manufacturing method according to  claim 1 , wherein
 the collecting step is a turn-around collecting step of collecting the threads while turning around the threads at a certain length.   
     
     
         5 . The manufacturing method for a bundle product according to  claim 1 , wherein
 the threads are hollow fiber membranes.   
     
     
         6 . The manufacturing method for a bundle product according to  claim 1 , wherein
 the managed quantity for the plurality of threads is the total surface area of the plurality of threads constituting the bundle product.   
     
     
         7 . The manufacturing method for a bundle product according to  claim 1 , wherein
 the managed quantity for the plurality of threads is the representative surface area of the plurality of threads constituting the bundle product.   
     
     
         8 . The manufacturing method for a bundle product according to  claim 6 , wherein
 in the inspecting step, outside diameters of the threads are measured, and surface areas of the threads are calculated on the basis of the obtained measured values of the outside diameters.   
     
     
         9 . The manufacturing method for a bundle product according to  claim 1 , further comprising the steps of:
 removing a thread determined to contain a defect in the inspecting step from the bundle of the plurality of threads, wherein   an amount of collection in the collecting step is adjusted so that at least one managed quantity for a plurality of threads selected from a group including a total number, a total weight, a representative weight, a total outside diameter value, a representative outside diameter value, a total surface area, and a representative surface area of the plurality of threads constituting a bundle product after the thread containing the defect is removed in the removing step exceeds a predetermined value.   
     
     
         10 . A manufacturing device for a bundle product including an inspecting unit that inspects two or more threads continuously running in parallel in a longitudinal direction, a collecting unit that collects the threads, and a cutting unit that, after completion of collecting, cuts all the collected threads at a predetermined position, to obtain a bundle product having a plurality of threads converged into a bundle, wherein
 the manufacturing device further includes:   a collection-amount adjusting unit that can adjust an amount of collection by the collecting unit on the basis of inspection results obtained by the inspecting unit so that at least one managed quantity for a plurality of threads selected from a group including a total number, a total weight, a representative weight, a total outside diameter value, a representative outside diameter value, a total surface area, and a representative surface area of the plurality of threads constituting the bundle product exceeds a predetermined value.   
     
     
         11 . The manufacturing device for a bundle product according to  claim 10 , wherein
 the threads are hollow fiber membranes.   
     
     
         12 . The manufacturing device for a bundle product according to  claim 10 , wherein
 the inspecting unit includes means for calculating surface areas of the threads on the basis of measured values of outside diameters obtained by the inspecting unit that measures the outside diameters of the threads.   
     
     
         13 . The manufacturing device for a bundle product according to  claim 10 , wherein
 on the assumption that a thread determined to contain a defect by the inspecting unit is removed from the bundle of the plurality of threads before the product is shipped, the collection-amount adjusting unit adjusts an amount of collection by the collecting unit so that at least one managed quantity for a plurality of threads selected from a group including a total number, a total weight, a representative weight, a total outside diameter value, a representative outside diameter value, a total surface area, and a representative surface area of the plurality of threads constituting a bundle product after the thread containing a defect is removed exceeds a predetermined value.