JP2011020151A - Workpiece holding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece holding device that holds a round pipe and a square pipe freely rotatably and freely movably in the axial direction and that is applicable to different types of pipe. <P>SOLUTION: The workpiece holding device 61 is provided with a pair of receiving members 66 that are freely rotatable around the axial center. The receiving members 66 are roughly columnar shaped, a recessed part 71 is formed like a groove along the circumferential direction. The cross section of the recessed part 71 is circular arcuate. The circular arcuate recessed part 71 is formed such that the diameter of the circular arc diminishes toward the front in the rotating direction of one receiving member 66 along the circumferential direction. The receiving members 66, 66 are rotated so that the part arranged between the pair of axial centers of the recessed part becomes the same circular arc as the diameter of the circumscribed circle of the pipe. Then, the pipe is arranged between the axial centers of the receiving members 66, with the outermost periphery of the pipe held in contact with the inner circumferential face of the recessed part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a workpiece support device used in a processing machine such as a laser processing machine for processing a long workpiece such as a pipe.

Conventionally, a rotation support member that supports a pipe (workpiece) to be processed so as to be rotatable around an axis, a support member that rotatably supports the pipe facing the rotation support member, and a laser for cutting the pipe There is known a laser processing machine for pipe processing provided with a processing head.
In this laser processing machine, the pipe can be cut into an arbitrary shape by moving the laser processing head (cutting torch) along at least the axial direction of the pipe and rotating the pipe. The cutting includes not only cutting one pipe into two pipes but also drilling a hole having an arbitrary shape in the pipe.

For example, the rotation support member rotates the pipe while the support member such as a pipe is chucked.
On the other hand, the support member suppresses drooping due to the weight of a long workpiece rotated by the rotation support member and swinging due to high-speed rotation. For example, two roller conveyors are arranged in a V shape, One that supports pipes between roller conveyors has been proposed (see, for example, Patent Document 1).
The rotation center of the rollers of the roller conveyor is orthogonal to the length direction of the workpiece, and the rollers rotate by moving in the length direction of the workpiece.

  Further, a support member has been proposed in which two rollers are arranged at intervals along the length direction of the workpiece, and the workpiece is arranged and supported between these two rollers (for example, Patent Document 2). reference). Each roller is rotated by the rotation of the workpiece. Further, the position of the core of the work can be adjusted to the rotation center of the rotation support member by changing the interval between the rollers according to the diameter of the work.

  In addition, a support member has been proposed in which a workpiece is sandwiched between rollers from four directions, and these rollers are rotatable in accordance with the rotation of the rotation support member (see, for example, Patent Document 3).

JP-A-11-156576 Japanese Patent Laid-Open No. 7-204892 JP 2001-121379 A

  By the way, in the inventions described in Patent Document 1 and Patent Document 2 described above, it is possible to rotatably support the cylindrical pipe while preventing the whirling, but the square pipe is rotatably supported. In particular, it has been difficult to rotatably support a rectangular pipe having a rectangular shape instead of a square cross section. That is, when the square pipe is rotated once, the time that the outermost peripheral portion (vertex of the corner portion) of the square pipe is not in contact with the support member is increased, and drooping or swinging occurs. It becomes difficult to prevent.

  Further, in the invention described in Patent Document 3, the support member is rotated by being supported by a bearing, for example, so that the workpiece can be rotated even if the cross-sectional shape of the workpiece is various polygons. As the support member having the pipe rotates, this becomes a load inertia. In other words, the inertia is increased by the support member that rotates integrally when the pipe rotates, and the workpiece is likely to be twisted during the rotation. In particular, in a thin pipe, there is a possibility that the twist becomes large and the processing accuracy may be reduced. is there.

  In addition, a method of rotating the support member by rotating the support member with a motor is also conceivable. By rotating the support member in synchronization with the rotation of the work on the rotation support member, an increase in inertia can be prevented. High cost is required for synchronous control with the rotation of the rotation support member of the motor, and there is a problem in cost as a support member for preventing shaking.

  The present invention has been made in view of the above circumstances, and can support not only a round pipe but also a square pipe as a work so that the work can be rotated and moved in the axial direction, and an increase in inertia with respect to the rotating work can be prevented. The object is to provide a support device.

In order to achieve the object, the work support device according to claim 1 is a work support device that supports a long work such as a pipe so as to be rotatable and movable in an axial direction.
A substantially columnar receiving member that supports the workpiece, and a base member that rotatably supports the receiving member around an axis that faces substantially in the vertical direction;
On the outer peripheral surface of the receiving member, a concave portion having a circular arc shape in which the workpiece is disposed is provided in a groove shape along the circumferential direction,
The radius of the arc of the recess is continuously reduced along the circumferential direction of the receiving member toward the front side in the one rotation direction of the receiving member,
The rotation angle around the axis of the receiving member is set so that the outermost peripheral part of the work comes into contact with the arc part of the recess having a diameter substantially equal to the circumscribed circle of the work section.

  In the invention described in claim 1, the work support device is, for example, a portion that is not supported by the rotation support device or the like in a state in which a long work is supported by a conventional rotation support device or the like so as to be rotationally driven. By supporting, long workpieces can be prevented from drooping or swinging.

  And in the part which supports the workpiece | work of a workpiece | work support apparatus, the substantially columnar receiving member which supports a workpiece | work is arrange | positioned rotatably by the base member at the periphery of an axial center. In the receiving member, a concave portion having a circular arc cross section for supporting the workpiece is formed in a groove shape along the circumferential direction, and the radius of the circular arc of the concave portion is on the front side in one rotational direction of the receiving member along the circumferential direction. It is getting smaller as it goes. In other words, the radius of the arc of the recess is increased along the circumferential direction toward the other rotation direction front side (one rotation direction rear side) of the receiving member.

  According to such a receiving member, depending on the position of the concave portion on the outer periphery of the receiving member, in other words, depending on the rotation angle of the receiving member with respect to the workpiece, the radius of the concave portion having an arc-shaped cross section varies. By rotating the receiving member around the axis so that the workpiece is placed in the concave portion with the same diameter as the circumscribed circle, the outermost peripheral portion of the workpiece contacts the concave portion of the same arc as the circumscribed circle of the cross section of the workpiece It will be supported in the state.

And when the workpiece is driven to rotate, the outermost peripheral part of the workpiece rotates while contacting the inner peripheral surface of the recess, so that the workpiece can be smoothly moved while preventing the workpiece from hanging down and swinging around the workpiece. It can be held in a rotated state. Furthermore, since there is no need to provide a member that rotates integrally with the workpiece, an increase in inertia can be prevented.
Moreover, it can respond to the workpiece | work of a different diameter by changing the rotation angle of a receiving member.

In addition, the shape of a workpiece | work can respond | correspond to the cylindrical, columnar shape, square cylinder shape, square columnar shape, other polygonal cylinder shapes, and a column-shaped elongate member, for example. Further, in the case of a rectangular tube shape and a quadrangular prism shape, the cross section may be a rectangular shape instead of a square shape.
Further, when the workpiece is cylindrical or columnar, the circumscribed circle of the workpiece cross section matches the shape of the outer peripheral edge of the workpiece cross section. Further, when the diameter of the workpiece to be processed is determined and the workpiece is processed, the receiving member is fixed to the base member so as not to rotate.

  Further, it is preferable that the receiving members are symmetrical to each other on the left and right with respect to the workpiece (in a mirror image relationship), and it is preferable that the left and right receiving members support one workpiece. At this time, the positions of the left and right receiving members along the axial direction of the workpiece do not have to be the same, and the positions of the left and right receiving members along the axial direction of the workpiece may be different. Further, the number of receiving members arranged on the left and right may be different.

According to a second aspect of the present invention, there is provided the work support device according to the first aspect of the invention, wherein the center of the arc of the recess is a circle centered on the axis in a plane perpendicular to the direction of the axis of the receiving member. Placed on top
In a state where the workpiece is disposed in the recess, the axis of the receiving member is inclined so that the smaller diameter of the recess is on the lower side of the slope than the portion in contact with the workpiece Features.

In the invention according to claim 2, since the center of the arc of the recess is arranged on a circle centering on the axis in one plane perpendicular to the direction of the axis of the receiving member, for example, different When a workpiece having a diameter is arranged and supported in contact with the circular arc portion corresponding to the diameter of the recess as described above, the center position of each workpiece having a different diameter is the same regardless of the diameter of the workpiece.
Accordingly, for example, the center position of the work supported by the receiving member is adjusted, for example, by adjusting the rotation angle of the receiving member without adjusting the height, for example, the work rotation driving unit (rotation support member) that drives the work to rotate. ) Can be matched with the center position of the workpiece supported. Workability can be improved.

  Also, in this case, as the diameter of the arc of the recess becomes smaller, the lower end of the inner peripheral surface of the recess becomes higher on the upper side, and the portion whose diameter is slightly smaller than the position of the recess having the same diameter as the circumscribed circle of the workpiece Since there is a risk of interference with the workpiece, the axis of the receiving member is slightly inclined with respect to the vertical direction (the direction perpendicular to the workpiece when the workpiece is horizontal), and the diameter of the concave portion is in contact with the workpiece By arranging so that the side where the angle becomes smaller is the lower side of the inclination, interference between the workpiece and the receiving member can be prevented.

  According to a third aspect of the present invention, there is provided the work support device according to the first or second aspect, wherein the work support device is disposed so as to support one work by at least a pair of left and right receiving members that are mirror images of each other. The arc portion of the recess having a radius substantially the same as the circumscribed circle of the cross section of the cross section is disposed on a plane including the axis of the left and right receiving members, and the arc portion disposed on the plane of the left and right receiving members It is characterized by being arranged in a state where the centers of the two are substantially coincident.

  In the invention according to claim 3, the arc portions of the left and right recesses having substantially the same diameter as the circumscribed circle of the workpiece are arranged on a plane including the axis of the left and right receiving members, and the centers of these arc portions coincide with each other. By doing so, the arc portions of the two recesses are combined to form an arc-shaped recess extending over a wider range of the same diameter. For example, when the left and right receiving members are provided with arc-shaped concave portions that are ¼ circles symmetrically, the arc-shaped concave portions that are ½ circle are formed by combining them. And a workpiece | work is arrange | positioned at the circular arc part which match | combined two recessed parts, and the outermost peripheral part of a workpiece | work contacts the inner peripheral surface of these recessed parts.

As a result, it is possible to reliably prevent the workpiece from sagging, and in a workpiece having a quadrangular or triangular cross section, at least one corner can almost always be in contact with the inner peripheral surface of the recess, In the case of a square workpiece, in most cases, the two corners are in contact with the inner peripheral surface of the recess.
As a result, it is possible to prevent the workpiece from sagging, promote smooth rotation of the workpiece, and suppress swinging.

  According to the workpiece support device of the present invention, the receiving member that can handle workpieces having different cross-sectional shapes (for example, a circle or a quadrangle) or a cross-sectional size (diameter) can prevent the workpiece from swinging or hanging. .

It is a perspective view showing a laser beam machine provided with a work support device of a 1st embodiment of the present invention. It is a principal part enlarged view of FIG. 1 which shows the pipe index apparatus part containing the said workpiece | work support apparatus of the said laser beam machine. It is a principal part perspective view which shows the said workpiece | work support apparatus. It is a principal part front view which shows the said workpiece | work support apparatus. It is a principal part side view which shows the said workpiece | work support apparatus.

Hereinafter, a work support device according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a laser processing machine 1 includes a laser processing machine main body 11 including a laser light source (not shown), a laser head 12, and the like, and a pipe index that rotationally drives a pipe (workpiece) and moves it in the axial direction. Device 31.
As shown in FIG. 1, the laser processing machine main body 11 includes a moving carriage 13 that moves the laser head 12 in, for example, an X-axis direction, a Y-axis direction, and a Z-axis direction orthogonal to each other. And the laser processing machine main body 11 is a well-known thing which moves the laser head 12 and performs the cutting process of a workpiece | work, for example.

  Here, when the workpiece is a pipe P, the pipe P held by the laser processing machine 1 is arranged along the Y-axis direction in which the axial direction is horizontal. The X-axis direction is a horizontal direction orthogonal to the axial direction of the pipe P along the Y-axis direction. The Z-axis direction is perpendicular to the axial direction of the pipe P along the Y-axis direction and is a direction along the vertical direction.

  As shown in FIG. 2, the pipe index device 31 includes a base 32 that serves as a base portion for supporting a workpiece, and a pair of linear motion guides 33 that are disposed on the base 32 at intervals from each other along the Y-axis direction. 33, and a workpiece moving support portion 34 that is guided by the linear motion guides 33, 33 and is movable along the Y-axis direction and supports the pipe P disposed along the Y-axis direction, and the pipe P is chucked A workpiece rotation drive unit 35 that includes a rotation mechanism that rotates in a state and rotates and supports the pipe P around its axis, and a workpiece support device 61 according to the present invention.

In the laser processing machine 1, the workpiece rotation driving unit 35 of the pipe index device 31 rotates the pipe P around its axis and moves the laser head 12 at least in the Y-axis direction along the axial direction of the pipe P. By irradiating the pipe P with laser, the pipe P is cut and processed. For example, a process of making a hole of an arbitrary shape in the pipe P can be performed.
The workpiece movement support section 34 is movable in the axial direction with respect to the pipe P while supporting the pipe P with respect to the pipe P fixed to the workpiece rotation driving section 35, and the laser head 12 is moved to the carriage. When moving in the Y-axis direction together with the workpiece 13, the workpiece movement support portion 34 also moves in the same manner as the laser head 12, and supports the vicinity of the portion of the pipe P to be processed by the laser head 12. In this case, the workpiece movement support portion 34 is in a state of sliding with respect to the pipe P.

Then, the workpiece support device 61 prevents the pipe P from hanging or swinging at a position away from the workpiece rotation driving unit 35 during movement of the pipe P in the axial direction or during rotation driving of the pipe P. The pipe P is supported.
As shown in FIGS. 3 to 5, the work support device 61 is guided by the linear motion guides 33, 33, is movable in the Y-axis direction, and has a movable base (base member) 62 that can be fixed in position. The positioning plunger pin 63 for positioning the moving base 62 on the base 32 including the linear motion guide 33, the retractable origin abutting member 64 for determining the position of the end portion of the pipe P, and the positions of the work support device 61 are as follows. A position detection magnet 65 for detection and a pair of receiving members 66 for supporting the pipe are provided.

The moving base 62 includes a guided portion (not shown) engaged with the linear guides 33 and 33 so as to be movable along the two linear guides 33 and 33 on the lower surface side thereof.
The positioning plunger pin 63 vertically penetrates the moving base 62 and is inserted into a pin hole formed in the base 32, for example, so that the moving base 62 is positioned and fixed. Note that a plurality of pin holes are formed in a line along the linear guides 33, 33 in the base 32, and at the position of the pin hole into which the positioning plunger pin 63 is inserted, the Y direction of the workpiece support device 61 is set. Is determined.

The retractable origin abutting member 64 can be raised and lowered, and the pipe P can be disposed at the origin position by contacting the end face of the pipe P in the raised state, for example.
The position detection magnet 65 is capable of measuring the position of the workpiece support device 61 by a magnetic sensor provided on the base 32 side.

  Further, the moving base 62 is provided with an inclined plate 67 disposed obliquely with respect to the moving base 62 and a pair of cylindrical shafts 68 and 68 extending perpendicularly from the inclined plate 67. Yes. The shafts 68 and 68 are arranged side by side in the X-axis direction with a space therebetween. Further, the shafts 68 and 68 are arranged so that the rotation center of the pipe P by the work rotation driving unit 35 passes through an intermediate point between the two shafts 68 and 68. In addition, the rotation center of the rotation of the pipe P by the work rotation driving unit 35 is along the Y-axis direction like the pipe P, and coincides with the center of the pipe P supported by the work support device 61. Become.

  Receiving members 66 and 66 are rotatably attached to the shafts 68 and 68 by bolts 69. The receiving members 66 and 66 are provided with shaft holes (not shown) into which the shafts 68 and 68 can be inserted from the lower surface side. The axial center of the receiving members 66 and 66 and the axial center of the shafts 68 and 68 coincide with each other, and the receiving members 66 and 66 rotate around the shafts 68 and 68 so that the receiving members 66 and 66 have the axial center. Will rotate around.

  The receiving members 66 and 66 are substantially columnar members, and a recess 71 having an arcuate cross section is formed around the upper portion along the circumferential direction. The recess 71 has an arc shape whose inner peripheral surface is a ¼ circle. In the recess 71, the tangent angle at the upper end of the inner peripheral surface is substantially parallel to the axis serving as the rotation center of the receiving members 66, 66, and the tangent angle at the lower end of the inner peripheral surface is the axis of the receiving members 66, 66. The angle is approximately perpendicular to the angle.

The recess 71 is formed not in the entire circumference of the receiving members 66 and 66 but in the circumferential direction only within a range of 225 degrees, for example.
In addition, the recess 71 is formed such that the diameter continuously decreases along the circumferential direction of the receiving members 66 and 66 toward the front side in the one rotation direction of the receiving members 66 and 66.
Further, the center of the arc of the recess 71 is arranged on a circle centering on the axis in one plane perpendicular to the direction of the axis of the receiving members 66 and 66.

Further, the plane on which the center of the arc of the recess 71 is disposed substantially coincides with the end surfaces of the receiving members 66 and 66. Moreover, the circular arc-shaped recessed part 71 used as a 1/4 circle is the state open | released to both the upper end surface side of the receiving members 66 and 66, and the surrounding surface side.
The lower edge (lower end) of the recess 71 disposed on the outer peripheral surface of the receiving members 66, 66 is substantially along the circumferential direction along the outer peripheral surface of the substantially cylindrical receiving members 66, 66, and the diameter of the recess 71 is the same. It is in a state of inclining upward from the large side toward the small side, and has a generally spiral shape.

Further, the upper edge (upper end) of the recess 71 disposed on the end surface of the receiving member 66, 66 is substantially along the circumferential direction, and the axis of the receiving member 66, 66 is from the smaller diameter toward the larger diameter. It is close to the heart and is generally spiral.
Further, for example, with respect to the range of 225 degrees in which the concave portions 71 of the receiving members 66 and 66 are formed, the remaining 135 degrees are notched, and the notched parts are As will be described later, when the pipe P is moved in the axial direction, a work escape portion 72 is provided for preventing the receiving members 66 and 66 from interfering with the pipe P.

  The workpiece relief portion 72 has a substantially cylindrical shape having a diameter larger than the diameter of the shafts 68, 68, but has a smaller diameter than the portion other than the workpiece relief portion 72. The lower portion of the work escape portion 72 is formed in a columnar shape, but has a diameter smaller than the diameter of the lower portion of the receiving member 66, 66 where the recess 71 is formed. Further, above the lower portion of the work escape portion 72, the diameter becomes smaller toward the upper side. Further, a large-diameter side edge 71a of the concave portion 71 is disposed on one side edge side of the workpiece escape portion 72, and a small-diameter side edge 71b of the concave portion 71 is disposed on the other side edge side.

Further, the shafts 68 and 68 disposed on the inclined plate 67 are inclined in accordance with the inclination of the inclined plate 67, and the inclination direction is increased along the Y-axis direction toward the upper side along the Z-axis direction. The inclination is away from the rotation drive unit 35. The receiving members 66 and 66 are also inclined corresponding to the shafts 68 and 68, and their axial centers are inclined.
The pair of receiving members 66 and 66 have a mirror image relationship with each other, and in the plane including both the pair of mutually parallel axes of the pair of receiving members 66 and 66 parallel to each other, the recess 71 Are arranged such that the arc centers of the arc portions in the plane coincide with each other. Further, the outer diameters of the columnar receiving members 66 and 66 are determined so that the outer peripheral surfaces of the lower portions of the pair of receiving members 66 and 66 are arranged close to each other to the extent that maintenance is possible.

The positions of the receiving members 66 and 66 that are substantially the same diameter as the circumscribed circle C of the pipe P to be processed in the recess 71 or slightly larger than the clearance are the axes of the two receiving members 66 and 66. It should be placed in one plane that contains the heart.
By doing so, arc-shaped concave portions 71 that are ¼ circles having a diameter that is the same as or slightly larger than the circumscribed circle C of the pipe to be processed are arranged on the plane so as to face each other. Together, these form a circular arc that forms the lower half of the circle. In this state, the receiving members 66 and 66 are fixed in a non-rotatable state with respect to the moving base 62.

When the pipe P is arranged in this portion, the outermost peripheral portion of the pipe P, for example, the outer peripheral surface of the cylindrical pipe or the corner apex of the square pipe is the receiving member 66 of the concave portion 71 of the receiving members 66, 66. , 66 is in contact with the inner peripheral surface portion intersecting the plane including the two axes. The radius of the arc of the recess 71 at this portion is substantially equal to the outer diameter of the pipe P, and the pipe P is in a state of being rotatable about its axis.
Thereby, it is possible to prevent the pipe P supported and rotated by the workpiece rotation driving unit 35 from hanging or swung at the position of the workpiece support device 61.

Moreover, since the diameter of the part arrange | positioned between the axial centers of these receiving members 66 and 66 changes by rotating the recessed parts 71 and 71 of the receiving members 66 and 66, a pair of receiving members 66 and 66 are respectively made. By rotating and adjusting the diameter of the concave portion arranged between these shaft centers to the diameter of the circumscribed circle C of the pipe P to be processed, it is possible to cope with pipes P having different diameters.
At this time, the center position of the arc of the arc-shaped recess 71 is arranged on a circle centered on the axis in a plane orthogonal to the axis (a plane including the end faces of the receiving members 66 and 66). Therefore, even if the receiving members 66 and 66 are rotated, the center position of the arc of the recess 71 disposed between these axes does not change, and the pipe P is supported when the pipe P is supported by the recess 71 portion. The center position does not change.

The center position of the pipe P at this time is arranged on a straight line along the Y-axis direction with the rotation center position of the pipe P supported and rotated by the work rotation driving unit 35.
Therefore, even if the shape and diameter of the pipe P to be processed are changed, the receiving members 66 and 66 are rotated so that the portions of the recesses 71 and 71 that have substantially the same radius as the circumscribed circle C of the pipe P are provided. Since the shaft center of the pipe P is disposed at a position on the Z axis corresponding to the rotation center in the work rotation driving unit 35 by being disposed between the shaft centers of the receiving members 66, 66, the receiving member 66. , 66 and the like need not be adjusted in the Z-axis direction, and the work for changing the pipe P to be machined can be simplified.

  In addition, the receiving members 66 and 66 are inclined between the axial centers of the recesses 71 and 71 so that the smaller radius is lower than the larger radius of the recesses 71 and 71. That is, the axis of the receiving members 66, 66 is inclined. Here, the center position of the arc corresponds to the same position on the axis (for example, the position of the upper end surface of the receiving members 66, 66) regardless of the radius of the arc of the arc-shaped recesses 71, 71 as described above. Therefore, the position of the lower end side of the inner peripheral surface of the recesses 71, 71 disposed between the shaft centers of the pair of receiving members 66, 66 tends to increase as the diameter decreases, and when the pipe P is supported, As described above, the diameter is smaller than the portion between the pair of shafts instead of the portion between the shafts of the pair of receiving members 66, 66 (in the plane including the shaft centers of the pair of receiving members 66, 66). The pipe P comes into contact with the inner peripheral surfaces of the recesses 71 and 71. Therefore, by tilting the receiving members 66 and 66 as described above, a portion other than the portion between the shaft centers of the pair of receiving members 66 and 66 (outside of the plane including the pair of shaft centers) becomes the pipe P. Contact can be prevented.

In addition, the inclination of the curve which goes up so that the diameter of the circular arc of the said recessed parts 71 and 71 of the recessed parts 71 and 71 becomes small is the diameter of a receiving member, the range of the recessed parts 71 and 71, and both ends of the recessed parts 71 and 71 It depends on the diameter of the part. Further, the inclination angles of the receiving members 66 and 66 are determined in accordance with the inclination of the curve that goes upward as the diameter of the lower end portion of the recesses 71 and 71 becomes smaller.
According to the receiving members 66 and 66 as described above, since the pipe P is supported by the arc-shaped concave portions 71 and 71 having substantially the same diameter as the circumscribed circle C of the pipe P, the cylindrical or square cylindrical pipe P is supported. can do. Further, as described above, it is possible to cope with the pipes P having different diameters of the circumscribed circle C. At this time, only the receiving members k66 and 66 are rotated, and the height position is not required to be adjusted.

  Moreover, even if it is the shape of the recessed parts 71 and 71 as mentioned above, the circular arc of the recessed parts 71 and 71 of each receiving member 66 and 66 is made into a circle below 1/4, and the tangent of the lower end part of the recessed part 71 is horizontal or supported. In a state of being inclined downward in a direction away from the pipe P, the tangent of the upper end portion of the recess 71 is in a state of being vertical (vertical) or inclined in a direction away from the supported pipe P, and as described above By setting the center in a tilted state, the pipe P comes into contact with other than the inner peripheral surface of the recesses 71 and 71 intersecting the plane including the axis of the pair of receiving members 66 and 66 described above, and the position of the pipe P is shifted. Can be prevented.

  Further, as described above, the receiving member 66, 66 arranged side by side in the X-axis direction has a circular arc portion having the same diameter as the circumscribed circle C of the pipe P as a plane including the two axial centers of the receiving member 66, 66. The pipe P is arranged in the two recesses 71 and 71 perpendicular to the plane in a state of being arranged in the part. At this time, when the pipe P has a large diameter and passes through the large diameter side of the recesses 71, 71, the pipe P passes between the escape portions 72, 72, and is received by the escape portions 72, 72. It is possible to move in the axial direction without interfering with the members 66 and 66.

  Note that a plurality of pairs of receiving members 66 and 66 may be arranged, and the positions of the receiving members 66 and 66 that are paired may be shifted along the Y-axis direction that is the axial position of the pipe. As long as one or more receiving members 66, 66 are arranged on the left and right sides of the pipe, the number of receiving members 66, 66 may be different on the left and right.

P pipe (work)
61 Work support device 62 Moving base (base member)
66 Receiving member 71 Recess

Claims (3)

A work support device for supporting a long work such as a pipe so as to be rotatable and movable in an axial direction,
A substantially columnar receiving member that supports the workpiece, and a base member that rotatably supports the receiving member around an axis that faces substantially in the vertical direction;
On the outer peripheral surface of the receiving member, a concave portion having a circular arc shape in which the workpiece is disposed is provided in a groove shape along the circumferential direction,
The radius of the arc of the recess is continuously reduced along the circumferential direction of the receiving member toward the front side in the one rotation direction of the receiving member,
A workpiece support characterized in that a rotation angle around an axis of the receiving member is set so that an outermost peripheral portion of the workpiece comes into contact with an arc portion of the recess having a diameter substantially equal to a circumscribed circle of the workpiece section. apparatus. The center of the arc of the recess is disposed on a circle centered on the axis in a plane perpendicular to the direction of the axis of the receiving member;
In a state where the workpiece is disposed in the concave portion, the axis of the receiving member is slanted so that the smaller diameter of the concave portion is on the lower side of the slope than the portion in contact with the workpiece. The workpiece support apparatus according to claim 1, wherein   The at least one pair of left and right receiving members that are mirror images of each other are arranged to support one workpiece, and the arc portion of the recess having the same radius as the circumscribed circle of the cross section of the workpiece is the left and right receiving members. 2. The device according to claim 1, wherein the center of the circular arc portion disposed on the plane of the left and right receiving members is substantially coincided with the center of the circular arc portion. Work support device according to 2

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