Abstract: An object of the present invention is to provide a roller bearing cage suited in particular to a supersized roller bearing, wherein the cage (1A) is configured such that a pair of ring parts (4 and 6) axially separated is connected by a plurality of column parts (5) sliding on an outer peripheral surfaces of rollers (RA), and a plurality of pocket holes (P) is evenly formed in a circumferential direction to store and hold the rollers (RA) at a peripheral wall portion, wherein a base body (2) including one ring part (4) and the column parts (5) with engagement convexes (5A) at leading ends thereof and a connection body (3) including the other ring part (6) with engagement concaves (6A) for engagement with the engagement convexes (5A) of the column parts (5) are set as separate members.

Abstract: A roller bearing cage (1A) is configured such that a pair of ring parts (4, 6) axially separated from each other is connected by column parts (5) sliding on outer peripheral surfaces of rollers (RA), and pocket holes (P) are evenly formed to store and hold the rollers (RA) in a peripheral wall portion in a circumferential direction. The cage (1A) is manufactured such that a base body (2) including the ring part (4) and the column parts (5) with square columnar convexes (5A) and a connection body (3) including the ring part (6) with square holes (6A) are set as separate members.

Abstract: Present invention relates to provide a cage suited in particular to a supersized roller bearing, which is easy to improve rigidity, realizes a reduction in manufacturing costs, facilitates dimension management and accuracy management, and is less prone to progress abrasion of end surfaces of rollers. A roller bearing cage (1A) is configured such that a pair of ring parts (4, 6) axially separated from each other is connected by column parts (5) sliding on outer peripheral surfaces of rollers (RA), and pocket holes (P) are evenly formed to store and hold the rollers (RA) in a peripheral wall portion in a circumferential direction. The cage (1A) is manufactured such that a base body (2) including the ring part (4) and the column parts (5) with square columnar convexes (5A) and a connection body (3) including the ring part (6) with square holes (6A) are set as separate members.

Abstract: An object of the present invention is to provide a roller bearing cage suited in particular to a supersized roller bearing, wherein the cage (1A) is configured such that a pair of ring parts (4 and 6) axially separated is connected by a plurality of column parts (5) sliding on an outer peripheral surfaces of rollers (RA), and a plurality of pocket holes (P) is evenly formed in a circumferential direction to store and hold the rollers (RA) at a peripheral wall portion, wherein a base body (2) including one ring part (4) and the column parts (5) with engagement convexes (5A) at leading ends thereof and a connection body (3) including the other ring part (6) with engagement concaves (6A) for engagement with the engagement convexes (5A) of the column parts (5) are set as separate members.

Abstract: In order to secure a shape retaining property of a support face of a backrest 1 of a chair, the backrest 1 for chairs comprises frame elements 21 and 22 arranged in pairs at right and left sides, a flexible support member 3 that bridges the frame elements 21 and 22 to support a load of a body of a seated person and an adjust mechanism that can change a bent degree of the support member 3 in multiple states and that can maintain the state against the load of the seated person.

Abstract: In order to secure a shape retaining property of a support face of a backrest 1 of a chair, the backrest 1 for chairs comprises frame elements 21 and 22 arranged in pairs at right and left sides, a flexible support member 3 that bridges the frame elements 21 and 22 to support a load of a body of a seated person and an adjust mechanism that can change a bent degree of the support member 3 in multiple states and that can maintain the state against the load of the seated person.

Abstract: In order to secure a shape retaining property of a support face of a backrest 1 of a chair, the backrest 1 for chairs comprises frame elements 21 and 22 arranged in pairs at right and left sides, a flexible support member 3 that bridges the frame elements 21 and 22 to support a load of a body of a seated person and an adjust mechanism that can change a bent degree of the support member 3 in multiple states and that can maintain the state against the load of the seated person.

Abstract: The present invention provides a system and a method for sampling groundwater under in-situ condition state in reliable, efficient and economic manner without disturbing environment of formation water present in under-ground layer. There are provided a continuous water sampling process and a batch style water sampling process for sampling formation water by confirming the same environment as that of the groundwater in the under-ground layer. After drilling water has been removed by the continuous water sampling process, formation water is repeatedly sampled by the batch style water sampling process, and a downhole system equipped with the continuous water sampling process and the batch style water sampling process is designed in such structure that it is moved up and down in a casing pipe and inserted into or removed from a packer system in the hole.