Abstract: Provided is a road link information updating device including an information acquisition unit configured to acquire speed information on a plurality of communication target vehicles in association with positions of the communication target vehicles, a road link information database configured to store road link information on a plurality of nodes and a road link connecting the nodes to each other, an inflection point position recognition unit configured to recognize an inflection point position in the road link from a change in the vehicle speed or the acceleration, a road link information updating unit configured to update the road link information by using the inflection point position as the node, and a recommended speed setting unit configured to set a recommended speed to the node, on the basis of the speed information and the road link information.

Abstract: An information analysis apparatus includes: a weight assigning unit that assigns a weight to each of a plurality of items based on an action taken by a user who has viewed a sales content on which the plurality of items to be recommended are posted; a selection unit that selects a plurality of pairs in which two items are selected among the plurality of items placed in the sales content and associated with each other; and an evaluation unit that evaluates a characteristic based on characteristic information indicating a property of each of the two items selected as a pair by the selection unit and the weight assigned by the weight assigning unit to the two items.

Abstract: A chair includes: a leg body; a backrest supporting body supported by the leg body; a backrest rear supporting member supported by the backrest supporting body; and a backrest that is supported by the backrest rear supporting member and supports the back of a user. The backrest has: a flexible upholstering material configured to receive the back of the user and is displaceable depending on the back; and a pair of vertical frame sections that are mounted on the upholstering material, have lower ends connected to the back rest rear section support section, and are separated in a width direction in which twisting deformation is allowed depending on a force applied from the upholstering material.

Abstract: A chair is provided in which a seat-receiving member is provided with outward flanges for regulating upward/downward displacement to support left and right lateral edges of a seat plate. Engaging grooves supported by the outward flanges are provided at the respective left and right lateral edges of the seat plate. Warpage allowable parts in which warpage deformation of the lateral edges is allowed without the upward displacement being regulated by the seat receiving member are provided in regions of the left and right lateral edges of the seat plate, in which the regions are located at a rear side from engagement parts between the engaging grooves and the outward flanges. With this constitution, it is possible to prevent the seat plate from being detached from the seat-receiving member while ensuring that, when an user is seated, the sides of the buttocks of the user are reliably held, and thus improve the seating stability of a seat body.

Abstract: A chair includes: a leg body; a backrest supporting body supported by the leg body; a backrest rear supporting member supported by the backrest supporting body; and a backrest that is supported by the backrest rear supporting member and supports the back of a user. The backrest has: a flexible upholstering material configured to receive the back of the user and is displaceable depending on the back; and a pair of vertical frame sections that are mounted on the upholstering material, have lower ends connected to the back rest rear section support section, and are separated in a width direction in which twisting deformation is allowed depending on a force applied from the upholstering material.

Abstract: A chair includes: a leg body; a backrest supporting body supported by the leg body; and a backrest supporting body supported by the backrest supporting body and configured to support the back of a user. The backrest supporting body has: a backrest which has a flexible upholstering material member that receives the back of the user and enables displacement depending on the back and a pair of vertical frame sections on which the upholstering material member is mounted and which are separated in a width direction in which the vertical frame sections are elastically deformable by a force applied from the upholstering material member; and a backrest rear section supporting member configured to connect the vertical frame sections—in an upward/downward direction.

Abstract: An engagement protrusion (20) extending in the front/back direction of a frame body (13) is provided on one of the opposing surfaces of a notch (16) in the frame body (13) and a fitting member (17) opposite said notch; similarly, an engagement recess (13h) in which the engagement protrusion (20) fits is provided on the other of said surfaces. By means of the moment of the fitting member (17) resulting from the tension of a tension member (14), the engagement protrusion (20) and the engagement recess (13h) are prevented from separating.

Abstract: An engagement protrusion (20) extending in the front/back direction of a frame body (13) is provided on one of the opposing surfaces of a notch (16) in the frame body (13) and a fitting member (17) opposite said notch; similarly, an engagement recess (13h) in which the engagement protrusion (20) fits is provided on the other of said surfaces. By means of the moment of the fitting member (17) resulting from the tension of a tension member (14), the engagement protrusion (20) and the engagement recess (13h) are prevented from separating.

Abstract: Provided is a chair in which the rear section of the seat can be raised with good lateral balance, in which the seat is stable, and that has a simple structure and a good appearance. The disclosed chair includes a seat (6) that is pivotally attached by means of a laterally-oriented pivot shaft (9) to a support base (5) supported by (a) leg(s), the rear section of the seat (6) being pivotable in the vertical direction. In said chair, an urging means (12) that urges the seat (6) upward is constructed so as to include: an elastic expanding-and-contracting component (13) that connects a portion of the support base (5) located below the pivot shaft (9) and a portion of the seat (6) located to the rear of the pivot shaft (9); and a pair of leaf-spring-like elastic warping components (14) provided on the right and left sides of the elastic expanding-and-contracting component (13).

Abstract: A backrest device for a chair, in which a backboard is easily flexible without a reduction in its strength, thus making the chair comfortable to sit on. The lower ends of both right and left sides of the back frame are supported at both sides at the back of a leg body, and the flexible back board is formed on the inside of rear frames. A large number of openings are formed in the backboard so as to be close to each other in the top-bottom and left-right directions. Between openings adjacent to each other in the left-right direction, there is formed a connection section continuing in the top-bottom direction, and the dimension in the front-back direction of the connection section is made larger than the dimension in the left-right direction of the connection section.

Abstract: A backrest device for a chair, capable of, without a reduction in its strength and rigidity, effectively bending backward so as to follow the shape of the back of a person seated on the chair, providing the person with excellent sitting comfort. In the backrest device, a back board is supported by a backrest frame, and the back board has a flexible back stopper on the inner side of a back frame. The thickness of a vertical intermediate section of the back stopper is gradually increased from both left and right sections of the intermediate section toward the center such that the thickness is less in both left and right sections and is maximum at the center.

Abstract: A chair backrest in which a frame-like back frame is covered with a bag-like upholstering material having an open lower end in a state of tension, the back frame being formed by connecting a pair of left and right side portion frames, which extend in an up and down direction, together at upper ends and lower ends thereof by an upper frame and a lower frame which extend in the left and right direction, wherein intermediate portions in the left and right direction of the upper frame and the lower frame are connected to each other by an intermediate frame which is situated behind the both side portion frames and is extended in the up and down direction, thereby causing an intermediate portion of a rear surface portion of the upholstering material to project rearward.

Abstract: An upholstered structure including an upholstery material for a chair or a backrest of a chair is proposed, which may achieve: reduced proportion of the appearance of the rear frame of the backrest over the appearance of the whole chair; more sophisticated design; reduced weight; reduced number of parts; and improved assemble-ability. In the chair having the backrest upholstered with the upholstery material over the front surface of the rear frame, the rear frame comprises a front frame to which the peripheral edge part of the upholstery material is fixed and an upper reinforcement frame rod. The laterally facing upper reinforcement frame rod is connected at its both ends to both ends of the laterally facing upper frame rod at the top of the front frame with the center part of the upper reinforcement frame rod separated backward from the upper frame rod.

Abstract: A backrest device for a chair, capable of, without a reduction in its strength and rigidity, effectively bending backward so as to follow the shape of the back of a person seated on the chair, providing the person with excellent sitting comfort. In the backrest device, a back board is supported by a backrest frame, and the back board has a flexible back stopper on the inner side of a back frame. The thickness of a vertical intermediate section of the back stopper is gradually increased from both left and right sections of the intermediate section toward the center such that the thickness is less in both left and right sections and is maximum at the center.

Abstract: A backrest device for a chair, in which a backboard is easily flexible without a reduction in its strength, thus making the chair comfortable to sit on. The lower ends of both right and left sides of the back frame are supported at both sides at the back of a leg body, and the flexible back board is formed on the inside of rear frames. A large number of openings are formed in the backboard so as to be close to each other in the top-bottom and left-right directions. Between openings adjacent to each other in the left-right direction, there is formed a connection section continuing in the top-bottom direction, and the dimension in the front-back direction of the connection section is made larger than the dimension in the left-right direction of the connection section.

Abstract: A stretching structure of a stretching material in a chair in which the ratio of the rear frame of a backrest to the outline of the chair is small, design is smart, weight is reduced, the number of parts is reduced, and assemblability is improved and the backrest of the chair. In the chair having the backrest formed by stretching the stretching material on the front surface of the rear frame, the rear frame comprises a front frame to which the peripheral edge part of the stretching material is fixed and an upper reinforcement frame rod. The laterally facing upper reinforcement frame rod is connected at its both ends to both ends of the laterally facing upper frame rod at the top of the front frame with the center part of the upper reinforcement frame rod separated backward from the upper frame rod.