The present invention relates to a scraper (14) for scraping a surface of a machine tool having a wear-indicating device (18, 20, 24, 30) for the scraper lip (16) of the scraper. At least one signal line (18) is embedded in the scraper lip (16) in such a manner that, upon reaching the wear limit (G), at least one section of the signal line (18) is exposed.

A sealing member for machine tools is capable of keeping sealing performance. The sealing member includes a support member and an elastic member formed in a flat plate shape. The elastic member includes an edge portion to slide on a sliding surface of a machine tool. The support member has a support surface facing a part of a front surface of the elastic member. The sealing member is mounted to the machine tool such that the elastic member is sandwiched between a mount portion of the machine tool and the support surface of the support member. The elastic member has a fixed portion sandwiched between the mount portion and the support member. A lip portion not sandwiched between the mount portion and the support member when the sealing member is mounted to the machine tool, the lip portion including the edge portion and configured to be curved.

A machine tool includes a drive portion that moves a movable cover on a rail, cleaning means that removes a foreign object on the rail, and a body control unit that controls the drive portion so as to move the movable cover on the rail. The machine tool further includes detection means that detects a foreign object on the rail, and the body control unit is configured to control the cleaning means so as to remove a foreign object on the rail, and to control the drive portion so as to move the movable cover on the rail, if the detection means does not detect any foreign object on the rail, or if the detection means detects a foreign object on the rail and thereafter the cleaning means removes the foreign object on the rail.

A machine according to at least one embodiment of the present invention comprises a rubber material to be supplied with an oil product containing a softener, wherein an absolute difference between a solubility parameter of the softener and a solubility parameter of the rubber material is 1.7 or less. The machine having a communication portion connecting the rubber material and an outside of the machine, and is configured to supply the oil product from a first end of the communication portion to a second end of the communication portion.

Provided are a wiper for a machine tool and a method for manufacturing a wiper for a machine tool, which can simplify a manufacturing process. A wiper for a machine tool mountable on a machine tool includes: a wiper body fixable to the machine tool, and made of a first elastic material having hardness of 80 degrees or more; and a sliding part made of a second elastic material containing a particulate reinforcing material and having hardness in a range of 50 degrees or more and 90 degrees or less which is smaller than the hardness of the first elastic material, the sliding part being provided integrally with the wiper body, wherein the wiper body and the sliding part are integrally formed without an adhesive.

A sealing member for machine tools is capable of keeping sealing performance. The sealing member includes a support member and an elastic member formed in a flat plate shape. The elastic member includes an edge portion to slide on a sliding surface of a machine tool. The support member has a support surface facing a part of a front surface of the elastic member. The sealing member is mounted to the machine tool such that the elastic member is sandwiched between a mount portion of the machine tool and the support surface of the support member. The elastic member has a fixed portion sandwiched between the mount portion and the support member. A lip portion not sandwiched between the mount portion and the support member when the sealing member is mounted to the machine tool, the lip portion including the edge portion and configured to be curved.

A wiper 1 of the present invention incudes a belt-like attachment part 2 made of a hard plate such as a metal plate or a plastic plate, and a lip part 3 made of an elastic body and attached to a side surface 21 of the attachment part 2. The side surface 21 of the attachment part 2 and the lip part 3 are vulcanized and bonded in a mold.

The present invention relates to a scraper (14) for scraping a surface of a machine tool having a wear-indicating device (18, 20, 24, 30) for the scraper lip (16) of the scraper. At least one signal line (18) is embedded in the scraper lip (16) in such a manner that, upon reaching the wear limit (G), at least one section of the signal line (18) is exposed.

A telescopic cover has a plurality of cover pieces nested in the order of their size for extension and retraction. A rubber cushion is on a side surface of an end portion of an insert-side cover piece, a wiper is inside an upper surface of a receiving-side cover piece receiving the insert-side cover piece so as to contact the upper surface of the insert-side cover piece, and a stopper is on the inner side surface of the end portion so as to be offset from the position of the wiper and face the rubber cushion. When the telescopic cover is retracted so that the respective end surfaces of the receiving-side and insert-side cover pieces become flush with each other, a gap between the cover pieces is closed by the wiper.

An object of the present invention is to provide a sealing member for machine tools which has excellent reliability because excellent sealability can be maintained for a long period of time and which can be manufactured efficiently at low cost. The sealing member for machine tools of the present invention includes a supporting member; a plate-shaped elastic member; and an adhesive layer which bonds the elastic member to the supporting member. The supporting member has a shape of a bent plate-like body, the elastic member is bonded to the supporting member via the adhesive layer laminated on a part of a front face of the elastic member so as to be curved along the bent shape of the supporting member, and a corner portion formed by a back face and one side face of the elastic member is assumed to be an edge portion in contact with an opposite material, and the one side face is formed by cutting.