Abstract: A chuck device in which a rotary sleeve provided to a main body is rotated, and by rotation of an annular rotary body which rotates together with the rotary sleeve, jaws screwed together with the rotary body are expanded, contracted, advanced, and retracted, and a tool is gripped by the jaws; the chuck device comprising a retaining engaging body for engaging with the rotary body and preventing the rotary sleeve from coming out of the rotary body; wherein the retaining engaging body is provided to be fixed to a proximal end side of the rotary sleeve; a rotation transmission part for directly or indirectly transmitting the rotation of the rotary sleeve to the rotary body is provided to the retaining engaging body; and the rotation of the rotary sleeve is transmitted to the rotary body via the retaining engaging body, and the rotary body rotates together with the rotary sleeve.

Abstract: To provide a tool holder that is capable of exerting a vibration-minimizing effect in a reliable manner using a simple configuration and that is extremely useful for practical application.

Abstract: A chuck device in which a rotary sleeve provided to a main body is rotated, and by rotation of an annular rotary body which rotates together with the rotary sleeve, jaws screwed together with the rotary body are expanded, contracted, advanced, and retracted, and a tool is gripped by the jaws; the chuck device comprising a retaining engaging body for engaging with the rotary body and preventing the rotary sleeve from coming out of the rotary body; wherein the retaining engaging body is provided to be fixed to a proximal end side of the rotary sleeve; a rotation transmission part for directly or indirectly transmitting the rotation of the rotary sleeve to the rotary body is provided to the retaining engaging body; and the rotation of the rotary sleeve is transmitted to the rotary body via the retaining engaging body, and the rotary body rotates together with the rotary sleeve.

Abstract: To provide a practical chuck device which is not only capable of providing more reliable and stable retention between the rotary body or the main body and the rotary sleeve, but also has excellent mass-productivity.

Abstract: To provide a tool holder that is capable of exerting a vibration-minimizing effect in a reliable manner using a simple configuration and that is extremely useful for practical application.

Abstract: An extremely useful rotating tool is provided that can prevent rattling caused by a clearance between a machine tool and a machine tool retaining hole while bringing the axial center position of the machine tool and the axial center position of the machine tool retaining hole as close together as possible. The present invention is a rotating tool having a rotating main shaft (4), and the rotating main shaft (4) is provided with a machine tool retaining hole (3) having a cross-sectional shape that substantially matches a base part (2) of a driver bit, drill bit, or other machine tool (1) having a polygonal cross-sectional shape that is inserted into the machine tool retaining hole (3), wherein the rotating tool rotates the machine tool (1) inserted in the machine tool retaining hole (3) by rotating the rotating main shaft (4) and performs work.

Abstract: An extremely useful rotating tool is provided that can prevent rattling caused by a clearance between a machine tool and a machine tool retaining hole while bringing the axial center position of the machine tool and the axial center position of the machine tool retaining hole as close together as possible. The present invention is a rotating tool having a rotating main shaft (4), and the rotating main shaft (4) is provided with a machine tool retaining hole (3) having a cross-sectional shape that substantially matches a base part (2) of a driver bit, drill bit, or other machine tool (1) having a polygonal cross-sectional shape that is inserted into the machine tool retaining hole (3), wherein the rotating tool rotates the machine tool (1) inserted in the machine tool retaining hole (3) by rotating the rotating main shaft (4) and performs work.

Abstract: A chuck device that prevents wear of ratchet teeth is provided. The chuck device includes a rotary sleeve which is rotated so that jaws inserted into a hole provided in a tip end of a body are slidingly opened and closed to thereby clamp a tool. Ratchet teeth forming an annular shape are provided in the body, an annular rotary member threadedly engaged with the jaws and rotated together with the rotary sleeve is fitted around the body inside of the rotary sleeve, a retainer spring member detachably engaging with the ratchet teeth is disposed outside of the ratchet teeth and the retainer spring member is provided so as to rotate a circumference of the ratchet teeth in accordance with the rotation of the rotary member. The ratchet teeth are formed of a harder member than the body, and the harder member is a discrete member from the body.

Abstract: To provide an excellent chuck assembly that is superior in assembling workability, may be produced in low cost and is superior in mass-production property, in which a rotary sleeve (2) provided on a body (1) is rotated, jaws (4) engaged with rotary nuts (3) are moved back and forth to be opened and closed by the rotation of the rotary nut (3) rotated together with the rotary sleeve (2) and a tool is clamped by the jaws (4), a ring member (8) is provided in the rotary nuts (3), a convex and concave engaging means is provided between the ring member (8) and the rotary sleeve (2), and the ring member (8 and the rotary sleeve 2 are retained and prevented from falling apart from each other by the convex and concave engaging means.

Abstract: To provide a chuck device for preventing the loosening of the fastening condition, a plurality of claws inserted into a hole provided at an end of a body are opened, closed and slid by the rotation of a rotary sleeve and a tool is clamped by means of the claws. A coating that is hard and has a low frictional coefficient as much as possible is applied to an inner surface of the hole.

Abstract: A chuck device in which a plurality of claws provided at an end of a body are opened, closed and slid by the rotation of a rotary sleeve and a tool is clamped by means of the claws. An annular ratchet wheel is provided on the body. An annular nut member to be engaged with the claws and to be rotated together with the rotary sleeve is fitted in the body inside of the rotary sleeve. A retainer spring member detachably retained with a tooth of the ratchet wheel is arranged outside of the ratchet wheel, the retainer spring member is arranged to rotate around the ratchet wheel in accordance with the rotation of the nut member, the retainer spring member is mounted on the nut member by convex/concave engagement means.

Abstract: A chuck is provided having a body, oblique guides converging toward a forward portion of the body, and a groove around the body. A slidable jaw within each guide includes outer threads. A rotatable mechanism engaging the groove includes threads for engaging the jaw threads. A toothed member extends around the body. An inner sleeve extends over and rotates the mechanism, while moving the jaws toward the forward portion. An outer sleeve extends over the inner sleeve. A metal intermediate sleeve between the inner and outer sleeves engages two spring members engaged with the inner sleeve. A first torque application rotates the intermediate sleeve with respect to the inner sleeve and causes one of the spring members to ratchet with the toothed member. A greater second torque application to the intermediate sleeve causes the other spring member to prevent rotation between the intermediate and inner sleeves.

Abstract: To provide an excellent chuck assembly that is superior in assembling workability, may be produced in low cost and is superior in mass-production property, in which a rotary sleeve (2) provided on a body (1) is rotated, jaws (4) engaged with rotary nuts (3) are moved back and forth to be opened and closed by the rotation of the rotary nut (3) rotated together with the rotary sleeve (2) and a tool is clamped by the jaws (4), a ring member (8) is provided in the rotary nuts (3), a convex and concave engaging means is provided between the ring member (8) and the rotary sleeve (2), and the ring member (8 and the rotary sleeve 2 are retained and prevented from falling apart from each other by the convex and concave engaging means.

Abstract: A keyless chuck is provided, comprising a generally cylindrical body having a forward and rearward portion with respect to an axis, the forward portion including a radially outwardly projecting portion of the body. The body further includes a plurality of guides extending obliquely to the axis and converging toward the forward section, and a groove extending around the body. Each of a plurality of jaws is slidably disposed within a respective guide and includes a thread section along an outer surface thereof. A jaw-engaging mechanism is configured to operably engage the groove so as to be rotatable around the body, and includes a thread section configured to complementarily engage the thread sections of the jaws. A sleeve extends over the jaw-engaging mechanism. A retaining member is disposed substantially within the sleeve, and is operably engaged with and extends between the body and the sleeve, rearwardly of the radially outwardly projecting portion of the body.

Abstract: A chuck device is provide with an annular ratchet tooth wheel in a body, an annular nut member that engages with claws nd rotates together with a rotary sleeve, and a retainer spring member for engaging the ratchet tooth wheel. The retainer spring member is rotated around the ratchet wheel in accordance with rotation of a retainer spring receiving sleeve within the retainer spring receiving sleeve t at rotates together with a nut member and that is fitted around the nut member and made of metal. The retainer spring member is mounted on the retainer spring receiving sleeve by a convex/concave engagement means. A retainer working portion is provided in a working sleeve, for rotating with the retainer spring receiving sleeve.

Abstract: An NC machine tool includes an NC circular table and an NC circular table apparatus which dispense with the original restoration or calibration operation in an absolute type encoder using a backup battery. The NC circular table has an NC controller for performing a positional detection by an absolute type encoder and a backup battery for the encoder is provided in the NC circular table body.

Abstract: To provide a chuck device for preventing the loosening of the fastening condition, a plurality of claws inserted into a hole provided at an end of a body are opened, closed and slid by the rotation of a rotary sleeve and a tool is clamped by means of the claws. A coating that is hard and has a low frictional coefficient as much as possible is applied to an inner surface of the hole.

Abstract: A chuck device in which a plurality of claws provided at an end of a body are opened, closed and slid by the rotation of a rotary sleeve and a tool is clamped by means of the claws. An annular ratchet wheel is provided on the body. An annular nut member to be engaged with the claws and to be rotated together with the rotary sleeve is fitted in the body inside of the rotary sleeve. A retainer spring member detachably retained with a tooth of the ratchet wheel is arranged outside of the ratchet wheel, the retainer spring member is arranged to rotate around the ratchet wheel in accordance with the rotation of the nut member, the retainer spring member is mounted on the nut member by convex/concave engagement means.

Abstract: To provide an NC controlling system that is superior in practical use and workability and that may perform an administration of inputting, compiling and storing a control program of a NC machine tool and a control program of an appended equipment together as one program in a NC controlling apparatus, an NC controlling system having an NC machine tool provided with a control program and appended equipment used together with the machine tool to be numerically controlled, wherein a control program of the appended equipment is written in an annotation part of the control program of the NC machine tool, and a reading unit is provided for identifying and reading the control program of the appended equipment written in the annotation part of the control program of the NC machine tool.