JP3169100U - Flexible stopper - Google Patents

Abstract

The present invention relates to a technique for fixing a workpiece on a machine tool in machining, and particularly provides a flexible stopper for fixing the workpiece using a magnet chuck or the like. A swinging portion having a cylindrical body having a central axis perpendicular to a longitudinal direction of the one end and a hemispherical spherical axis on the opposite side of the one end, If the stopper block comprised by the rectangular parallelepiped main body 7 which has the ball bearing 6 which bears 5 in the side surface is used, the said stopper block can be made to contact a workpiece | work reliably. [Selection] Figure 3

Description

  The present invention relates to a technique for fixing a work on a machine tool in machining, and more particularly to a technique for fixing a work using a magnet chuck or the like.

  As a conventional technique for fixing a workpiece on a machine tool, the workpiece is placed on a table containing an electromagnet, and a metal piece (hereinafter referred to as a stopper block) having a block shape from a plurality of directions on the table plane. ) Is brought into contact with the work, and the power of the electromagnet is turned on in this state, so that a stopper block is attracted to the table surface by a magnetic force to fix the work on the table. (For example, refer nonpatent literature 1).

  Moreover, as a shape of a stopper block, there exists a thing which one end was notched in V shape, and a thing provided with two strip | belt-shaped springs at one end. (For example, refer nonpatent literature 1 and 2.).

  Further, there is known a tray having a mechanism in which a movable member having a bifurcated arm swings along a guide groove, thereby gripping a mounting substrate together with a positioning member. (For example, refer to Patent Document 1).

Japanese Patent Laying-Open No. 2007-184442 (FIG. 1)

“Carbide magnet chuck SM-C1580”, Sanai Seiki Co., Ltd., http: // www. rnac. ne. jp / ˜sanaisk / html / jp / magnet2. html

“Chuck Block KTV-1”, Kanetec Corporation, http: // www. kanetec. co. jp / products / kt. html

  FIG. 1 shows a top view of a conventional stopper block, and FIG. 2 shows a side view thereof.

  When a workpiece is fixed on the table surface with a magnetic chuck, the workpiece needs to be fixed with a fastener from at least three directions.

  In FIG. 1, one end of the stopper block has a V-shaped notch shape, and the tip of the notch shape comes into contact with the work to support the work at two points.

  In the case of a cuboid workpiece, one stopper block is brought into contact with each of the four side surfaces. In this case, it is ideal that there are a total of eight contacts between the workpiece and the stopper block.

  However, since the rectangular parallelepiped can be fixed on a flat surface if the periphery is fixed by at least four fulcrums, the work is fixed on the flat surface even if one of the notched tips of the stopper block is not in contact with the work.

  However, when a strong force is applied to the workpiece, such as surface grinding, the stopper block that is in contact with only one of the notched tips has the contact point with the workpiece as the action point. A moment force that tries to rotate the stopper block works, and as a result, the stopper block rotates, and the workpiece is loosely fixed, and the play generated there may reduce the machining accuracy of the workpiece.

  The same applies to the case where a workpiece having a thin cylindrical body is fixed by three stopper blocks from three directions.

One end has a V-shaped cutout shape, or two cylindrical bodies, cylindrical bodies, prismatic bodies, or semi-cylindrical bodies having a central axis perpendicular to the longitudinal direction of the one end are provided at one end and on the opposite side of the one end. A fastener (hereinafter referred to as the first device) characterized by comprising a swinging portion having a hemispherical ball shaft and a rectangular parallelepiped or substantially rectangular parallelepiped main body having a ball bearing for bearing the ball shaft on its side surface. The workpiece is fixed.

  A main body of a pillar having a substantially L-shaped top surface and a bottom surface and having a plurality of ball bearings on the side surface of the substantially L-shaped inner side, and one end having a V-shaped cutout shape or the one end Equipped with two cylindrical bodies, cylindrical bodies, prismatic bodies, or semi-cylindrical bodies whose central axis is perpendicular to the longitudinal direction of one end, and a hemispherical spherical shaft that fits the ball bearing of the main body on the opposite side of the one end The workpiece is fixed by a fastener (hereinafter referred to as a second device) characterized by comprising a plurality of swinging portions provided.

  FIG. 3 shows a top view of the first device having a cylindrical body at the tip, and FIG. 4 shows a side view thereof.

  3 and 4, 2 is a swinging portion, 3 and 4 are cylindrical bodies that are a part of the swinging portion 2, 5 is a spherical axis provided in the swinging portion 2, and 7 is a main body , 6 is a hide wire of a ball bearing for bearing the ball shaft 5 provided in the main body 7.

  3 and 4, the ball shaft 5 has a hemispherical shape, and since the inner diameter of the ball bearing 6 is slightly larger than the diameter of the ball shaft 5, the swinging portion 2 can freely move in the vertical and horizontal directions around the ball shaft 5. You can shake your head.

  Therefore, when the first device is brought closer to the work than the swinging portion 2, either the cylindrical body 3 or 4 first comes into contact with the work, and when the first device is further pushed toward the work, The moment force that rotates the swinging portion 2 acts on the cylindrical body 3 or 4 that contacts the workpiece, and the cylindrical bodies 3 and 4 eventually contact the workpiece.

  Furthermore, when the first device is pressed against the workpiece, even if the workpiece is in contact with the side surfaces of the cylindrical bodies 3 and 4 at one point, the cylindrical body is rotated with respect to the contact point. The moment force to act acts, and the cylindrical bodies 3 and 4 come into contact with the workpiece at two points or line contact respectively.

  In this state, the distance between the center of rotation of the ball shaft 5 and the work is the shortest. Therefore, in this state, the swinging portion 2 no longer swings the head, and a plurality of first books surrounding the work are placed. Is fixed on the table surface, the workpiece is stably fixed on the table surface or the like.

  FIG. 5 shows a top view of the first device having a V-shaped notch at the tip.

  In FIG. 5, 8 is a swinging portion, 5 is a ball shaft provided in the swinging portion 8, 7 is a main body, and 6 is a hide wire of a ball bearing provided in the main body 7.

  The first device shown in FIG. 5 has the same shape and structure as those of the first device shown in FIGS. 3 and 4 except that the shape of the tip of the swinging portion 8 is different. It is.

  However, in the first device shown in FIG. 5, the tip of the swinging portion 8 has a V-shaped notch shape, and is suitable for fixing a thin columnar or cylindrical workpiece. It can be said that there is.

  FIG. 6 shows a top view of the second device.

  In FIG. 6, 9 is a main body, 2 and 10 are swinging portions, 3, 4, 11 and 12 are cylindrical bodies which are a part of the swinging portion 2 or 10, and 5 and 13 are swinging The ball shafts provided in the part 2 or 10, and the reference numerals 6 and 14 are hide wires of the ball bearings provided in the main body 9.

  The second device has a shape suitable for fixing a rectangular parallelepiped workpiece from a corner. If the swinging portions 2 and 10 of the second device are brought into contact with the corner of the rectangular parallelepiped workpiece, If all the cylindrical bodies 3 and 4 and 11 and 12 are brought into contact with the side surface of the workpiece by the same action as the first device, and another second device is brought into contact with the opposite corner of the workpiece, The workpiece can be easily fixed by the two second devices.

  As described above, by using the present invention, workpieces of various shapes can be easily and surely fixed on a flat surface, but the action and effect thereof are exchanged between the shape of the ball shaft in the swinging portion and the shape of the ball bearing in the main body. It will not change.

  Further, unlike the invention described in Patent Document 1, the present invention can swing freely in any direction by the action of the ball shaft and the ball bearing without the swinging portion being restricted by the guide groove. This makes it possible for the tip of the swinging portion to make a line contact or a point contact at two points on the side surface of the workpiece, and to always fix the workpiece on a plane without play.

It is a top view of the stopper block in a prior art. It is a side view of the stopper block in a prior art. It is a top view of the 1st device provided with the cylinder at the tip. It is a side view of the 1st device provided with the cylinder at the tip. FIG. 3 is a top view of the first device having a V-shaped cutout at the tip. It is a top view of the 2nd device. It is a side view in embodiment of the 1st invention provided with the cylindrical body at the front-end | tip. It is a top view in the embodiment of the first device having a V-shaped notch at the tip. It is a top view in an embodiment of the second device. It is a side view of the 1st device provided with a through hole and an elastic body in the body.

  FIG. 7 shows a side view in the embodiment of the first device having a cylindrical body at the tip.

  In FIG. 7, 2 is a swinging part, 4 is a side surface of a cylindrical body that is a part of the swinging part 2, 5 is a ball shaft provided in the swinging part 2, and 7 is a soft iron body. 6 is a hide wire of a ball bearing for bearing the ball shaft 5 provided in the main body 7, 15 is a trapezoidal work, and 21 is a magnet chuck.

  In FIG. 7, when the first device is brought closer to the work 15, the lower end of the cylindrical body 4 first comes into contact with the side surface of the work 15. A moment force is generated that causes the swinging portion 2 to rotate counterclockwise in FIG. 7 with the contact point as a fulcrum, and this movement continues until the cylindrical body 4 comes into line contact with the workpiece 15.

  The state in which the cylindrical body 4 is in line contact with the workpiece 15 is the state in which the distance between the main body 7 and the workpiece 15 is the shortest, and the same applies to the other first devices that are brought into contact with the other side surfaces of the workpiece 15. When the magnetic force of the magnet chuck 21 is applied in this state, the work 15 is fixed on the upper surface of the magnet chuck 21 without play.

  FIG. 8 shows a top view of the first embodiment in which the tip has a V-shaped cutout shape.

  In FIG. 8, 8 is a swinging part, 5 is a ball shaft provided in the swinging part 8, 7 is a main body, 6 is a hide wire of a ball bearing provided in the main body 7, and 16 is thin. This is a cylindrical workpiece.

  In FIG. 8, when the first device is brought closer to the work 16, one end of the swinging portion 8 first comes into contact with the side surface of the work 16. A moment force is generated that causes the swinging portion 8 to rotate counterclockwise in FIG. 7 with the contact point as a fulcrum, and this movement continues until the two ends of the swinging portion 8 come into contact with the workpiece 16.

  Since this state is the state in which the distance between the main body 7 and the workpiece 16 is the shortest, similarly, the other side of the workpiece 16 is brought into contact with the first direction from the three directions using the other first device. If this idea is fixed, the workpiece 16 is fixed on the plane without play.

  FIG. 9 shows a top view of the second embodiment.

  In FIG. 9, 9 is a main body, 2 and 10 are swinging portions, 3, 4, 11, and 12 are cylindrical bodies that are a part of the swinging portion 2 or 10, and 17 is a bottom surface and a top surface. This work has a rhombus-shaped column.

  In FIG. 9, when the second device is brought closer to the work 17 from the bottom to the top in FIG. 9, the cylindrical bodies 3 and 4 come into contact with the work 17, and this state is changed from right to left in FIG. When approaching the workpiece 17, the cylindrical body 12 first comes into contact with the side surface of the workpiece 17, but when the second device is further brought closer to the workpiece 17, the contact point between the cylindrical body 12 and the workpiece 17 is swung around the fulcrum. A moment force that rotates the portion 10 counterclockwise in FIG. 9 is generated, and this movement continues until the cylindrical bodies 11 and 12 come into contact with the workpiece 16.

  In the above-described state, the distance between the main body 9 and the work 17 is the shortest in the vertical direction and the horizontal direction. Similarly, the other second device is used to contact the opposite corner of the work 17. If the second device is fixed at that position, the workpiece 17 is fixed on the plane without play.

  FIG. 10 shows a side view of the first device provided with a through hole and an elastic body in the main body.

  In FIG. 10, 2 is a swinging part, 4 is a side surface of a cylindrical body that is a part of the swinging part 2, 5 is a spherical axis provided in the swinging part 2, 7 is a main body, Reference numeral 6 denotes a hide line of a ball bearing for bearing the ball shaft 5 provided in the main body 7, and reference numerals 18 a and 18 b denote hide lines indicating a side surface of the through hole extending from the bottom of the ball bearing 6 to the opposite side surface of the main body 7. , 19 is a hide wire indicating an elastic body (for example, a coiled urethane string) whose one end is fixed to the apex portion of the spherical shaft 5, and 20 is a hook of the other end of the elastic body 19 to the side surface of the main body 7. It is a hide line which shows the shape of the fastening part to do.

  In FIG. 10, a constant tension is always applied to the elastic body 20, and this force suppresses the separation of the main body 7 and the swinging portion 2, and at the same time keeps the swinging portion 2 horizontal. It helps to make a line contact with the side of the work quickly and improves the convenience of use.

  In addition, the main body of the second device is equipped with a through-hole from the bottom of each ball bearing to the opposite side of the main body, and passes through the through-hole to the top of each ball shaft. The same operation and effect can be achieved when an elastic body that is locked on the side surface is mounted.

  In addition, in order to suppress the slip between this invention and a workpiece | work, it is possible to coat | cover a diamond particle etc. at the front-end | tip of the swing part of this invention.

  By incorporating a magnet on the bottom surface of the main body of the present invention, a work can be fixed on a table made of iron or an iron plate without using a magnet chuck.

  In particular, if the main body of the present invention is configured using a magnet stand, the present invention can be easily detached from the table surface.

1 Chuck block 2, 8, 10 Swing part 3, 4, 11, 12 Cylindrical body 5, 13 Ball shaft 6, 14 Ball bearing hide wire 7, 9 Body 15, 16, 17 Work 18a, 18b Hide through hole Wire 19 Elastic hide wire 20 Fastening wire 21 Fastening wire Magnet chuck

Claims (4)

One end has a V-shaped cutout shape, or two cylindrical bodies, cylindrical bodies, prismatic bodies, or semi-cylindrical bodies having a central axis perpendicular to the longitudinal direction of the one end are provided at one end and on the opposite side of the one end. A fastener comprising a swinging portion having a hemispherical ball shaft and a rectangular parallelepiped or substantially rectangular parallelepiped body having a ball bearing for bearing the ball shaft on a side surface. A main body of a pillar having a substantially L-shaped top surface and a bottom surface and having a plurality of ball bearings on the side surface of the substantially L-shaped inner side, and one end having a V-shaped cutout shape or the one end Equipped with two cylindrical bodies, cylindrical bodies, prismatic bodies, or semi-cylindrical bodies whose central axis is perpendicular to the longitudinal direction of one end, and a hemispherical spherical shaft that fits the ball bearing of the main body on the opposite side of the one end A fastener comprising a plurality of swing parts provided. A main body having a through hole penetrating the side opposite to the bottom of the ball bearing, a swinging portion having an elastic string or a coiled spring attached to the apex of the ball axis, and the through hole of the main body. The fastener according to claim 1 or 2, further comprising: a fastening portion that locks the distal end of the elastic string or coiled spring that reaches the opposite side surface to the main body. 4. The fastener according to claim 1, wherein the ball bearing in the main body is replaced with a hemispherical ball shaft, and the ball shaft of the swinging portion is replaced with a ball bearing for bearing the replaced ball shaft in the main body. .

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