Abstract: A task in operation is accurately inferred. A task management device (3) includes: a data generating section (336) that generates time series data of coordinates; a linear data extracting section (337) that extracts linear data from the time series data of the coordinates; and a task inferring section (339) that infers, on the basis of the linear data and a target object included in a captured image, a task being carried out at a time point at which the captured image is obtained.

Abstract: Provided is a bending angle calculation method capable of saving a worker time and effort. The bending angle calculation method includes: an image capturing step (S1) of capturing an image of a pipe in which a first pipe and a second pipe are joined together by a joint; a derivation step (S3) of deriving, from the image, a laying direction straight line corresponding to a laying direction of the pipe; and a calculation step (S4) of calculating, as a bending angle at the joint, a crossing angle between a laying direction straight line of the first pipe and a laying direction straight line of the second pipe.

Abstract: Achieved is a determination method which enables accurate determination as to a bending angle. A bending angle determination method includes: an input reception step of receiving, with respect to a joint at which a first pipe and a second pipe are joined together, inputs of respective parameters of a plurality of predetermined positions set in a circumferential direction of the first pipe; and a bending angle determination step of determining whether a bending angle at the joint is appropriate, on the basis of the parameters that have been inputted in the input reception step.

Abstract: It is possible to precisely manage a task in operation by precisely inferring the task with use of a trained model that is constructed by machine learning. A task management device (3) includes: a first outputting section (312) configured to output a detection class that is inferred to appear in a task at a time point at which a captured image is obtained, the detection class being inferred by inputting the captured image to an index inference model (321); and a task inferring section (314) configured to infer, on the basis of an output result from the first outputting section, the task being carried out at the time point at which the captured image is obtained.

Abstract: A pipe joint in which a seal body and a spacer are mounted from the insides of pipes, wherein: a spigot of one pipe is inserted into a socket of the other pipe; and an annular accommodation space is formed between the inner circumference of the socket and the outer circumference of the spigot. Inside the accommodation space are accommodated: a seal body for sealing the gap between the socket and the spigot; a push ring that presses the seal body to keep the seal body in a compressed state; and a spacer that maintains the interval between the push ring and the deep end of the socket in the pipe axial direction.

Abstract: A communication terminal includes: a flying object information acquiring unit configured to acquire flying object information including manager identification information of managers of flying objects and information about flight locations from the flying objects; a display control unit configured to cause a display unit to display the flight locations of the flying objects on the basis of the acquired flying object information; a selection accepting unit configured to accept selection of a target flying object from among one or more flying objects of which the flight locations are displayed in the display unit; and a communication control unit configured to transmit the manager identification information of the manager of the selected target flying object and a message for the manager or a chatting start request for chatting with the manager to a management device.

Abstract: Provided is a bending angle calculation method capable of saving a worker time and effort. The bending angle calculation method includes: an image capturing step (S1) of capturing an image of a pipe in which a first pipe and a second pipe are joined together by a joint; a derivation step (S3) of deriving, from the image, a laying direction straight line corresponding to a laying direction of the pipe; and a calculation step (S4) of calculating, as a bending angle at the joint, a crossing angle between a laying direction straight line of the first pipe and a laying direction straight line of the second pipe.

Abstract: A plain bearing includes: a bearing body; a radial bearing portion arranged on an inner peripheral surface of the bearing body; a thrust bearing portion arranged on an axial end surface of the bearing body; a damper portion arranged on an outer peripheral surface of the bearing body; a dam portion arranged on the outer peripheral surface of the bearing body; and an oil hole having an inlet that opens to at least one of the outer peripheral surface of the bearing body and the dam portion, and an outlet that opens to the inner peripheral surface of the bearing body. The inlet, at least a part of the dam portion, and the damper portion are arranged in this order from an axially inner side toward an axially outer side. An outlet of an upstream side oil passage is connected to the inlet on a radially outer side.

Abstract: A construction management document creation device includes: a first input processing unit configured to repeat a process of assigning a unique pipe number and a unique joint number in association with pipe attribute information, and thereby generate pipe connection information from which connection relationship between laying pipes is identifiable based on the pipe number and the joint number, and pipe laying information from which a type and a laying position of each laying pipe are identifiable based on the pipe attribute information; a second input processing unit configured to generate assembled condition management information based on assembling procedure confirmation information and assembled condition evaluation information input for each pipe assembling section identified by the joint number; and a document generation processing unit configured to generate a construction management document including a daily construction report based on the pipe connection information, the pipe laying information, a

Abstract: A pipe joint in which a seal body and a spacer are mounted from the insides of pipes, wherein: a spigot of one pipe is inserted into a socket of the other pipe; and an annular accommodation space is formed between the inner circumference of the socket and the outer circumference of the spigot. Inside the accommodation space are accommodated: a seal body for sealing the gap between the socket and the spigot; a push ring that presses the seal body to keep the seal body in a compressed state; and a spacer that maintains the interval between the push ring and the deep end of the socket in the pipe axial direction.