JP2013086139A - Angle adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an angle adjusting device which does not require any high welding skill, when welding an end of a pipe to the side part of another pipe.SOLUTION: The angle adjusting device 10 includes: a pipe holding part 20 holding a welded object 50; a first adjustment mechanism 30 rotating the pipe holding part 20 around an rotation axis A1 to gradually change a direction of a first pipe 51; and a second adjustment mechanism 40 rotating the pipe holding part 20 around a center line A2 of the first pipe 51 to change a direction of a second pipe 52. As the direction of the first pipe 51 gradually changes from one arrangement of a lengthwise direction arrangement and a crosswise direction arrangement to the other arrangement, the second adjustment mechanism 40 adjusts such that the direction of the second pipe 52 becomes near a horizontal direction H in the crosswise direction arrangement as compared with in the lengthwise direction arrangement, and gradually changes the direction of the second pipe 52 to one direction during change from the one arrangement up to the other arrangement.

Description

  The present invention relates to an angle adjusting device used when two pipes are welded to each other.

  Patent Document 1 proposes a welding method for welding a pipe to a plate-like member (mounting flange). In Patent Document 1, a plate-like member is disposed at a right angle with respect to the central axis at the end of the pipe in a state where the central axis of the pipe is inclined from the horizontal, and the joint is viewed from above. A welding method is disclosed in which a welding torch is positioned so as to be welded, and a pipe and a plate-like member are rotated about a central axis to join the whole circumference of the pipe by mag welding.

JP 2008-142768 A

  However, when diverting the welding method described in Patent Document 1 to the use of welding the end of another pipe to the side of the pipe used in a refrigeration apparatus such as an air conditioner, for example, For these reasons, advanced welding skills are required.

  That is, in the welding method described in Patent Document 1, it is assumed that the pipe and the plate-like member are joined. At the joint portion between the pipe and the plate-like member, while the pipe and the plate-like member rotate once, The angles of each other are always perpendicular without changing. Accordingly, during welding, the operator can perform the welding operation while substantially fixing the positions of the welding torch and the welding rod.

  On the other hand, when the end of the second pipe is welded to the side of the first pipe, when the pipes are rotated around the central axis of the second pipe, the first pipe is shaped like a tube. As a result, the angle formed by the surface of the first pipe and the surface of the second pipe continues to change during rotation in the weld. Therefore, in this case, advanced welding skills are required.

  Therefore, the present invention has been made in view of such points, and the object of the present invention is to adjust the angle so that advanced welding skills are not required when welding the end of another pipe to the side of the pipe. To provide an apparatus.

  In the angle adjusting device of the present invention, when the end of the second pipe (52) is welded to the side of the first pipe (51), the direction of the first pipe (51) and the direction of the second pipe (52) Adjust the orientation. In the angle adjusting device, the end of the second pipe (52) is disposed on the side of the first pipe (51) with the second pipe (52) facing upward or obliquely upward. A pipe holding portion (20) for holding (50), and the pipe holding portion about a rotation axis (A1) orthogonal to the direction of the first pipe (51) and passing through the substantially center of the first pipe (51). A first adjusting mechanism (30) that gradually changes the direction of the first pipe (51) by rotating at least one turn (20); and the rotation of the pipe holding portion (20) by the first adjusting mechanism (30). In conjunction with the second adjustment mechanism (40) that rotates the pipe holding part (20) around the center line (A2) of the first pipe (51) to change the direction of the second pipe (52). It is equipped with.

  When the second adjustment mechanism (40) is viewed from the front, the orientation of the first pipe (51) gradually changes from one of the vertical arrangement and the horizontal arrangement to the other arrangement. Thus, the direction of the second pipe (52) is closer to the horizontal direction (H) in the horizontal arrangement than in the vertical arrangement, and the one arrangement to the other arrangement. During the change, the direction of the second pipe (52) is gradually changed in one direction.

  When the end of the second pipe (52) is welded to the side of the first pipe (51), the object to be welded (50) has a tubular shape as it rotates about the rotation axis (A1). As a result, the angle formed by the surface (S1) of the first pipe (51) and the horizontal direction (H) changes. Therefore, in this configuration, as the first adjustment mechanism (30) gradually changes the orientation of the first pipe (51) from one of the vertical arrangement and the horizontal arrangement to the other arrangement, The pipe holding portion (20) with the center line (A2) as the center so that the orientation of the second pipe (52) is closer to the horizontal direction (H) in the horizontal orientation than in the vertical orientation. Turn to change the direction of the second pipe (52). Then, during the change from the one arrangement to the other arrangement, the direction of the second pipe (52) is gradually changed in one direction.

  As a result, the direction (D1 to D4) for dividing the angle (θ1 to θ4) between the surface (S1) of the first pipe (51) and the surface (S2) of the second pipe (52) into two equal parts varies. Can be suppressed. Thereby, there is little angle adjustment of the filler material (B) and welding torch (T) by an operator, and it becomes unnecessary depending on the case. Therefore, even an operator who does not have the advanced welding skill that has been conventionally required can appropriately perform welding.

  In the angle adjusting device, the pipe holding portion (20) is connected to the placement portion (21) for placing the workpiece (50) and the placement portion (21), and the center line (A2). And a shaft portion (23) extending in the direction of the first and second adjustment mechanisms, wherein the first adjustment mechanism (30) is connected to the pedestal (33) that rotatably supports the shaft portion (23) and the pedestal (33). And a shaft (32) that rotates the pedestal (33) about the rotation axis (A1), and the second adjustment mechanism (40) is a linkage member provided in the mounting portion (21). (42) and a guide member (41) arranged to be inclined with respect to a plane orthogonal to the rotation axis (A1) and guiding the linkage member (42).

  With such a simple configuration, the direction of the first pipe (51) and the direction of the second pipe (52) are automatically adjusted, and the surface (S1) of the first pipe (51) and the second pipe (52). Fluctuation in the direction (D1 to D4) that bisects the angle (θ1 to θ4) formed with the surface (S2) of the substrate can be suppressed.

  In the angle adjustment device, the second adjustment mechanism (40) may further include a biasing portion (43) that biases the linkage member (42) toward the guide member (41).

  In this configuration, when the linkage member (42) moves, the linkage member (42) is prevented from being separated from the guide member (41). Thereby, it can control that the direction of the 2nd pipe (52) shifts from the desired direction.

  ADVANTAGE OF THE INVENTION According to this invention, when welding the edge part of another pipe to the side part of a pipe, the angle adjustment apparatus which does not require a high welding skill can be provided.

It is a perspective view which shows the angle adjustment apparatus which concerns on one Embodiment of this invention. It is a side view which shows the said angle adjustment apparatus. It is sectional drawing when the said angle adjustment apparatus is cut | disconnected by the plane containing a shaft. (A) is a perspective view showing a first pipe and a second pipe before joining, (B) is a perspective view showing a state where the first pipe and the second pipe are positioned at the joining position, C) is a perspective view showing the first pipe and the second pipe after joining. The workpieces (first pipe and second pipe) are in a first position (welding start position), and (A) is a schematic view of the angle adjusting device viewed from the direction of the rotation axis A1. (B) is the schematic seen from the side, (C) is the schematic seen from the front. The workpiece is in a second position, (A) is a schematic view of the angle adjusting device as viewed from the direction of the rotation axis A1, and (B) is a schematic view of the angle adjustment device as viewed from the side. is there. The workpiece is in a third position, (A) is a schematic view of the angle adjusting device viewed from the direction of the rotation axis A1, and (B) is a schematic view viewed from the side. is there. The workpiece is in the fourth position, (A) is a schematic view of the angle adjusting device as viewed from the direction of the rotation axis A1, and (B) is a schematic view as viewed from the side. is there. (A) is a perspective view which shows the modification 1 of a guide member, (B) is the IXB-IXB sectional view taken on the line of (A). (A) is a perspective view which shows the modification 2 of a guide member, (B) is the XB-XB sectional view taken on the line of (A). It is a figure which shows the relationship between pipes when pipes are joined using the conventional welding method, (A) has shown the state which a to-be-welded object exists in a 1st position, (B) The state to which a to-be-welded object exists in a 2nd position is shown.

  Hereinafter, an angle adjusting device 10 according to an embodiment of the present invention will be described with reference to the drawings. The angle adjusting device 10 according to the present embodiment is used when welding the workpiece 50 (the first pipe 51 and the second pipe 52). Both the first pipe 51 and the second pipe 52 have a cylindrical shape.

  The angle adjusting device 10 adjusts the direction of the first pipe 51 and the direction of the second pipe 52 when welding the end of the second pipe 52 to the side of the first pipe 51, so This is intended to enable a person who is not able to weld the pipes appropriately. The direction of the first pipe 51 refers to the direction in which the first pipe 51 extends (the direction of the center line A2 of the cylinder), and the direction of the second pipe 52 refers to the direction in which the second pipe 52 extends (the center of the cylinder). Line direction).

  As shown in FIGS. 1 to 3, the angle adjustment device 10 includes a base 11, a pipe holding unit 20, a first adjustment mechanism 30, and a second adjustment mechanism 40. The base 11 plays a role of supporting the pipe holding unit 20, the first adjustment mechanism 30, and the second adjustment mechanism 40. The pipe holding unit 20, the first adjustment mechanism 30, and the second adjustment mechanism 40 are directly or indirectly attached to the base 11.

  As shown in FIG. 1, the base 11 has a groove 14 extending from the upper part toward the front part, and a housing space (not shown) provided below the groove 14. A motor 34, which will be described later, is disposed in the housing space, and a shaft 35 that extends upward or obliquely upward along the groove 14 is disposed in the groove 14 (see FIG. 3). The shaft 35 connects the turntable 31 and the motor M.

  The base 11 is provided with an inclination angle adjusting lever 13 for adjusting the inclination angle of the turntable 31. By rotating the tilt angle adjusting lever 13, the tilt angle of the shaft 35 changes, and the tilt angle of the turntable 31 changes accordingly.

  The pipe holding unit 20 holds the workpiece 50 in a state in which the end of the second pipe 52 is arranged on the side of the first pipe 51 with the second pipe 52 facing upward or obliquely upward. In the following description, the case where the workpiece 50 is held in a posture in which the second pipe 52 faces obliquely upward will be described as an example.

  The pipe holding part 20 includes a placement part 21, a sandwiching part 22, a shaft part 23, and an urging part 25. A workpiece 50 is placed on the placement portion 21. The mounting portion 21 is formed of a plate-like member that is bent in a V shape so as to be adapted to the outer diameters of various first pipes 51. That is, the direction of the workpiece 50 is stabilized by arranging the workpiece 50 on the mounting portion 21 so that the direction of the first pipe 51 is aligned with the direction of the V-shaped ridge line.

  The sandwiching portion 22 regulates the movement of the workpiece 50 in the direction of the center line A2 of the first pipe 51. The sandwiching portion 22 includes a first sandwiching member 22 a fixed to one end portion of the placement portion 21 and a second sandwiching member 22 b disposed at the other end portion of the placement portion 21. A support plate 26 is disposed outside the second sandwiching member 22b. A lower portion of the support plate 26 is fixed to an end portion of the placement portion 21. The second pinching member 22b is movable in the direction of the center line A2.

  The shaft portion 23 is for rotatably supporting the placement portion 21 on a pedestal 33 described later. The shaft portion 23 includes a first shaft member 23a connected to the outer surface of the first sandwiching member 22a and a second shaft member 23b connected to the outer surface of the second sandwiching member 22b. The first shaft member 23 a is inserted into a through hole provided in one side wall portion 33 a of the pedestal 33, and the second shaft member 23 b is a through hole provided in the support plate 26 and the other side wall of the pedestal 33. It is inserted through a through hole provided in the portion 33b. Thereby, the mounting part 21 of the pipe holding part 20 is supported by the base 33 so as to be rotatable about the center line A2.

  The urging portion 25 is for urging the second pinching member 22b toward the first pipe 51. The urging portion 25 includes an extending piece 25a, an extending piece 25b, a spring 25c, and an outer cylinder 25d.

  The outer cylinder 25d is fixed to the outer surface of the side wall 33b of the pedestal 33, and extends in the direction of the center line A2. The second shaft member 23b is inserted into the outer cylinder 25d. The distal end portion of the second shaft member 23b protrudes outward in the direction of the center line A2 from the outer cylinder 25d. The extending piece 25a is connected to the outer surface of the outer cylinder 25d and extends in a direction orthogonal to the rotation axis A2. The extending piece 25b is connected to the distal end portion of the second shaft member 23b and extends in a direction orthogonal to the center line A2. The spring 25c is spanned between the extended piece 25a and the extended piece 25b. Thereby, the 2nd pinching member 22b is urged | biased by the 1st pipe 51 side.

  The first adjustment mechanism 30 rotates the pipe holding unit 20 around the rotation axis A1 that is orthogonal to the direction of the first pipe 51 and passes through the substantially center of the first pipe 51 (perpendicular to the center line A2 of the first pipe 51). Thus, the direction of the first pipe 51 is gradually changed. Here, the approximate center of the first pipe 51 means the middle of the longitudinal direction and the radial direction of the first pipe 51 or the vicinity thereof. In the operation of welding one workpiece 50, the first adjustment mechanism 30 rotates the pipe holding unit 20 at least once. The first adjustment mechanism 30 includes a turntable 31, a shaft 32, a pedestal 33, a motor 34, and a shaft 35.

  The pedestal 33 includes a flat plate-like bottom portion 33c provided at a position close to the placement portion 21 along the longitudinal direction of the placement portion 21, and a pair of flat plate-like shapes standing upward or obliquely upward from both ends of the bottom portion 33c. Side wall portions 33a and 33b.

  The turntable 31 has a disk shape. A shaft 35 is connected to the inner surface of the turntable 31 at the center in the radial direction. One end of a shaft 32 is connected to the outer surface of the turntable 31 at the center in the radial direction.

  The shaft 32 is disposed coaxially with the shaft 35 (on the rotation axis A1). The other end of the shaft 32 is connected to a substantially middle position in the longitudinal direction and the width direction on the lower surface of the bottom 33 c of the pedestal 33. The axial directions of the shafts 32 and 35 are orthogonal to the direction in which the bottom 33 c of the pedestal 33 extends and the direction in which the mounting portion 21 extends. That is, the rotation axis A1 and the center line A2 are orthogonal.

  The second adjustment mechanism 40 changes the direction of the second pipe 52 by turning the pipe holding portion 20 around the center line A2 of the first pipe 51. The second adjustment mechanism 40 includes a guide member 41, a linkage member 42, an urging portion 43, an outer cylinder 44, and support members 45 and 46.

  The guide member (ring member) 41 is for determining the track of the linkage member 42 when the pipe holding portion 20 rotates about the rotation axis A1. The guide member 41 has a circular shape, an elliptical shape, or a ring shape close to these. In this embodiment, the case where the guide member 41 has a substantially elliptical shape will be described as an example. The guide member 41 is formed of, for example, a wire having a circular cross section (for example, a metal wire, a resin wire, etc.). The direction of the long axis (ellipse long axis) of the guide member 41 is substantially parallel to a plane including the rotation axis A1 and extending in the vertical direction.

  The guide member 41 is disposed so as to surround the shaft 32 or the pipe holding portion 20. The guide member 41 is disposed above or obliquely above the turntable 31. The virtual plane F2 parallel to the guide member 41 and passing through the guide member 41 and the virtual plane F2 parallel to the turntable 31 and passing through the turntable 31 are not parallel but form a predetermined angle θ (see FIG. 2). Yes. The angle θ is an acute angle, and is preferably 45 ° or less. The angle formed by the virtual plane F2 and the horizontal direction is larger than the angle formed by the virtual plane F1 and the horizontal direction. The distance between the virtual plane F1 and the virtual plane F2 decreases as it goes downward.

  A mechanism for changing the angle θ may be provided. Specifically, for example, a connecting portion between support members 45 and 45 described later and a guide member 41 is connected by an attachment member such as a screw, and the angle θ is adjusted by removing (loosing) the attachment member such as a screw. Thereafter, the support members 45 and 45 and the guide member 41 are fixed again by the attachment member. Thereby, angle (theta) can be adjusted.

  The guide member 41 is attached to the base 11 by a support member 45 and a support member 46. Specifically, one end of a substantially L-shaped linear support member 45 is connected to one end portion in the short axis direction of the guide member 41, and a substantially L-shaped line is connected to the other end portion in the short axis direction. One end of the support member 45 is connected. The other ends of these support members 45 are connected to the side portion of the outer cylinder 44. Each support member 45 is fixed to the side surface of the base 11 via a corresponding support member 46.

  The shaft 32 is inserted into the outer cylinder 44. The outer cylinder 44 is not interlocked with the shaft 32. That is, the outer cylinder 44 does not rotate when the shaft 32 rotates about the rotation axis A1. By providing the outer cylinder 44, the guide member 41 is attached in an stabilized manner by the outer cylinder 44, and lateral blurring is suppressed.

  The linking member 42 is for linking the guide member 41 to change the direction of the second pipe 52. The linkage member 42 has a bar shape. The linkage member 42 is connected to the placement unit 21. Specifically, the base end portion of the linkage member 42 is connected to a substantially middle position in the longitudinal direction on the outer surface of the placement portion 21. An imaginary straight line extending from the base end portion of the linkage member 42 in the direction in which the linkage member 42 extends passes through the rotation axis A1 or the vicinity thereof.

  The linkage member 42 is in contact with the guide member 41. Specifically, the length of the linkage member 42 is larger than the radius of the guide member 41 (in this embodiment, the long radius of the guide member 41). The distal end portion of the linkage member 42 protrudes radially outward from the guide member 41, and a part of the distal end portion of the linkage member 42 is in contact with the guide member 41 from above.

  The urging portion 43 is for urging the linking member 42 toward the guide member 41. As shown in FIGS. 1 and 3, the urging portion 43 includes an extending piece 43a, an extending piece 43b, and a spring 43c. In addition, illustration of the urging | biasing part 43 is abbreviate | omitted in FIG.

  The extending piece 43a is connected to the distal end portion of the first shaft member 23a and extends in a direction orthogonal to the center line A2. Specifically, the extending direction of the extending piece 43a extends in a direction in which a rotational force is applied to the first shaft member 23a in a circumferential direction around the rotation axis A1 by a spring 43c described later. The tip of the extension piece 43a is bent to prevent the spring 43c from coming off.

  The extending piece 43b is connected to the lower surface of the bottom 33c of the pedestal 33, and extends downward or obliquely downward in the direction of the rotation axis A1. That is, the extension piece 43b extends to the turntable 31 side. The leading end of the extending piece 43 b is separated from the surface of the turntable 31. The spring 43c is spanned between the distal end portion of the extending piece 43a and the distal end portion of the extending piece 43b.

  Next, an example of the workpiece 50 will be described. FIG. 4A is a perspective view showing the first pipe 51 and the second pipe 52 before joining, and FIG. 4B shows the state where the first pipe 51 and the second pipe 52 are positioned at the joining position. FIG. 4C is a perspective view showing the first pipe 51 and the second pipe 52 after joining.

  As shown in FIG. 4A, a substantially circular through hole 51a is formed in advance in the side portion of the first pipe 51. As shown in FIG. 4B, the end of the second pipe 52 is inserted into the through hole 51a. The second pipe 52 is positioned in the state shown in FIG. 4B with respect to the first pipe 51 by a positioning member (not shown). As shown in FIG. 4C, the first pipe 51 and the second pipe 52 are welded by the welding method described below. A bead is formed in the welded portion W.

  The first pipe 51 has an outer diameter that is greater than or equal to the outer diameter of the second pipe 52. Based on the outer diameter ratio between the first pipe 51 and the second pipe (the outer diameter of the first pipe 51: the outer diameter of the second pipe 52), the degree of variation in the direction of the second pipe 52 is adjusted. The degree of fluctuation refers to the direction of the second pipe 52 at the first position P1 (the direction of S2 in FIG. 5) and the direction of the second pipe 52 at the second position P2 (the direction of S2 in FIG. 6). ), The direction of the second pipe 52 at the third position P3 (direction S2 in FIG. 7), and the direction of the second pipe 52 at the fourth position P4 (direction S2 in FIG. 8). ).

  The degree of variation in the direction of the second pipe 52 is, for example, the angle θ between the guide member 41 and the turntable 31 and the angle between the plane F2 parallel to the guide member 41 and the direction of the linkage member 42 (FIG. 6B It can be adjusted by changing

  Further, the degree of variation in the direction of the second pipe 52 is set to be larger as the outer diameter of the second pipe 52 is closer to the outer diameter of the first pipe 51, and the outer diameter of the second pipe 52 is set to the outer diameter of the first pipe 51. The smaller the value is, the smaller the value is set. Specifically, the degree of variation in the direction of the second pipe 52 is set to a maximum of 45 degrees when the ratio of the outer diameter of the first pipe 51 to the outer diameter of the second pipe 52 is 1: 1, The minimum zero degree is set when the ratio of the outer diameter of the pipe 51 to the outer diameter of the second pipe 52 is ∞: 1.

  Next, an example of the operation of the angle adjusting device 10 and a welding method will be described. 5A to 5C show a state in which the work piece 50 (the first pipe 51 and the second pipe 52) is in the first position P1. 6A and 6B show a state in which the work piece 50 is in the second position P2. 7A and 7B show a state in which the work piece 50 is in the third position P3. 8A and 8B show a state in which the work piece 50 is in the fourth position P4. 5A to 8B, only the configuration necessary for explaining the function of the angle adjusting device 10 is shown, and the other configurations are not shown.

  In the present embodiment, the case where the first position P1 shown in FIGS. 5A to 5C is selected as the welding start position and the welding end position is illustrated, but the present invention is not limited to this. As the welding start position and the welding end position, for example, the second position P2 shown in FIGS. 6A and 6B, the third position P3 shown in FIGS. 7A and 7B, and FIGS. It is also possible to select the fourth position P4 shown in B) or a position between them. Moreover, although the case where the pipe holding part 20 rotates clockwise (clockwise) when viewed from the front is illustrated in the present embodiment, it may be rotated in the opposite direction.

  At the first position P1 and the third position P3, the direction of the first pipe 51 is vertical, and at the second position P2 and the fourth position P4, the direction of the first pipe 51 is horizontal. Here, the vertical direction means that the direction of the first pipe 51 when viewed from the front (when viewed in the direction F) is directed in the vertical direction or the front-rear direction. The term “sideways” means that the first pipe 51 is oriented in the left-right direction when viewed from the front (when viewed in the direction F).

  In the angle adjusting device 10, the first adjusting mechanism 30 gradually changes the direction of the first pipe 51 by rotating the pipe holding portion 20 at least once around the rotation axis A <b> 1 orthogonal to the direction of the first pipe 51. As the second adjustment mechanism 40 is gradually changed from one of the vertical direction and the horizontal direction to the other by the first adjustment mechanism 30, the direction of the second pipe 52 is horizontal in the horizontal direction than in the vertical direction. The direction of the second pipe 52 is changed by turning the pipe holding portion 20 around the center line A2 so as to be closer to the direction. Specifically, it is as follows.

  First, at the first position P1 of the welding start position, the first pipe 51 is vertically oriented, and the linkage member 42 is oriented in a direction parallel to the horizontal direction H (see FIG. 5A). At this time, the second pipe 52 is oriented in a direction substantially parallel to the rotation axis A1. In the present embodiment, the rotation axis A1 is inclined about 45 degrees with respect to the horizontal direction H.

  In such a first position P1, the angle θ1 formed by the upper surface S1 of the first pipe 51 and the upper surface S2 of the second pipe 52 is approximately 90 degrees. Since the rotation axis A1 is inclined by about 45 ° with respect to the horizontal direction H, the direction D1 that bisects the angle θ1 formed by the surface S1 and the surface S2 is substantially in the vertical direction V.

  When the operator holds the filler metal (welding rod) B and the welding torch T in the left and right hands and welds the workpiece 50, the angle adjustment device 10 is laterally moved as shown in FIG. When viewed from the above, the welding work may be performed by arranging the filler material (welding rod) B, the welding torch T, and the direction D1. Further, as shown in FIG. 5C, the orientation of the filler metal (welding rod) B when the angle adjusting device 10 is viewed from the front is inclined by several tens of degrees (for example, about 20 degrees) with respect to the horizontal direction H. The welding torch T is disposed with an inclination of several tens of degrees (for example, about 80 degrees) with respect to the horizontal direction H.

  The operator presses a switch (not shown) with the filler material B and the welding torch T arranged as described above. An example of the switch is a mode in which the motor 34 is operated by being stepped on with a foot. Thereby, the operator can weld the welding part W with the filler material B and the welding torch T while operating the motor 34 intermittently. The motor 34 may be operated continuously instead of intermittently.

  When the motor 34 operates, the pipe holding unit 20 rotates about the rotation axis A1. Thereby, the pipe holding | maintenance part 20, the connection member 42, and the to-be-welded object 50 move toward the 2nd position P2 from the 1st position P1.

  Here, the angle θ between the guide member 41 and the turntable 31 and the angle between the plane F2 parallel to the guide member 41 and the direction of the linking member 42 (see FIG. 6B) are determined by the first adjustment mechanism 30. With the gradual change from one of the vertical direction and the horizontal direction to the other, the direction of the second pipe 52 is set closer to the horizontal direction in the horizontal direction than in the vertical direction.

  During the movement from the first position P1 to the second position P2, the linkage member 42 moves while contacting the guide member 41 (while tracing the guide member 41), so the direction of the second pipe 52 is in the horizontal direction H. It changes smoothly in the direction of approach.

  And in the 2nd position P2, the 1st pipe 51 is sideways, and the connection member 42 has faced the direction parallel to the plane containing the vertical line V (refer FIG. 6 (A)). At this time, the direction of the second pipe 52 is inclined with respect to the rotation axis A1, and is directed in a direction closer to the horizontal direction H than the rotation axis A1 (see FIG. 6B). That is, at the second position P2, the angle between the direction of the second pipe 52 and the horizontal direction H is smaller than that at the first position P1. At the second position P2, the upper surface S1 of the first pipe 51 is a curved surface extending in the circumferential direction, so that the tangent line (the straight line indicated by the alternate long and short dash line S1 in FIG. 6B) is the first It is closer to the horizontal direction H than the direction of the surface S1 at the position P1.

  Therefore, at the second position P2, the angle θ2 formed by the surface S1 located above the first pipe 51 and the surface S2 located above the second pipe 52 is greater than 90 degrees (for example, hundreds of tens Every time). Moreover, in the present embodiment, not only the tangent line of the surface S1 of the first pipe 51 approaches the horizontal direction H, but also the surface S2 of the second pipe 52 is also moved in the horizontal direction H by the first adjustment mechanism 30 and the second adjustment mechanism 40. You can get closer. Therefore, the direction D2 that bisects the angle θ2 formed by the surface S1 and the surface S2 is maintained in a state of being substantially directed to the vertical direction V. Therefore, the operator can perform the welding operation while changing the directions of the filler metal B and the welding torch T during the movement from the first position P1 to the second position P2.

  On the other hand, in the conventional mechanism shown in FIGS. 11A and 11B, at the first position P11, the angle θ11 formed by the surface S11 of the first pipe 51 and the surface S12 of the second pipe 52 is about 90 degrees. The direction D11 that bisects the angle θ11 formed by the surface S11 and the surface S12 is substantially in the vertical direction V (see FIG. 11A).

  However, at the second position P12, the upper surface S11 of the first pipe 51 is a curved surface extending in the circumferential direction, so that the tangent (the straight line indicated by the alternate long and short dash line S11 in FIG. 11B) is the first It is closer to the horizontal direction H than the direction of the surface S11 at the position P11. On the other hand, the direction of the second pipe 52 does not change from the time of the first position P11 and is directed to the direction of the rotation axis A1.

  Accordingly, at the second position P12, the angle θ12 formed by the surface S11 of the first pipe 51 and the surface S12 of the second pipe 52 is greater than 90 degrees, and the angle θ11 formed by the surface S11 and the surface S12 is 2 The equally dividing direction D11 is directed in a direction inclined from the vertical direction V (see FIG. 11A). Therefore, the operator needs to perform the welding work while making the orientation of the filler metal and the welding torch correspond to the change from the direction D11 to the direction D12. Such work requires skill.

  Next, the movement from the second position P2 to the third position P3 will be described. During this movement, the linking member 42 moves while contacting the guide member 41 (tracing the guide member 41), so the direction of the second pipe 52 smoothly changes in a direction away from the horizontal direction H.

  In the third position P3, the first pipe 51 is in the vertical direction, and the linking member 42 is in the horizontal direction H (see FIG. 7A). At this time, the second pipe 52 is oriented in a direction substantially parallel to the rotation axis A1 (see FIG. 7B). That is, at the third position P3, the angle between the direction of the second pipe 52 and the horizontal direction H is larger than that at the second position P2.

  In such a third position P3, the angle θ1 formed by the upper surface S1 of the first pipe 51 and the upper surface S2 of the second pipe 52 is approximately 90 degrees. Since the rotation axis A1 is inclined by about 45 ° with respect to the horizontal direction H, the direction D1 that bisects the angle θ1 formed by the surface S1 and the surface S2 is substantially in the vertical direction V. Therefore, the operator can perform the welding operation while changing the directions of the filler metal B and the welding torch T during the movement from the second position P2 to the third position P3.

  Next, the movement from the third position P3 to the fourth position P4 will be described. During this movement, the linking member 42 moves while contacting the guide member 41 (while tracing the guide member 41), so that the direction of the second pipe 52 smoothly changes in a direction approaching the horizontal direction H.

  And in the 4th position P4, the 1st pipe 51 is sideways, and the connection member 42 has faced the direction parallel to the plane containing the vertical line V (refer FIG. 8 (A)). At this time, the direction of the second pipe 52 is inclined with respect to the rotation axis A1, and is directed in a direction closer to the horizontal direction H than the rotation axis A1 (see FIG. 8B). That is, at the fourth position P4, the angle between the second pipe 52 and the horizontal direction H is smaller than that at the third position P3. Further, at the fourth position P4, the surface S1 located above the first pipe 51 is a curved surface extending in the circumferential direction, and therefore the tangent line (the straight line indicated by the alternate long and short dash line S1 in FIG. It is closer to the horizontal direction H than the direction of the surface S1 at the position P3.

  Therefore, at the fourth position P4, the angle θ2 formed by the upper surface S1 of the first pipe 51 and the upper surface S2 of the second pipe 52 is greater than 90 degrees (for example, hundreds of tens Every time). Moreover, in the present embodiment, not only the tangent line of the surface S1 of the first pipe 51 approaches the horizontal direction H, but also the surface S2 of the second pipe 52 is also moved in the horizontal direction H by the first adjustment mechanism 30 and the second adjustment mechanism 40. You can get closer. Therefore, the direction D2 that bisects the angle θ2 formed by the surface S1 and the surface S2 is maintained in a state of being substantially directed to the vertical direction V. Therefore, the operator can perform the welding operation while changing the directions of the filler metal B and the welding torch T during the movement from the third position P3 to the fourth position P4.

  Finally, the movement from the fourth position P4 to the first position P1 will be described. During this movement, the linking member 42 moves while contacting the guide member 41 (tracing the guide member 41), so the direction of the second pipe 52 smoothly changes in a direction away from the horizontal direction H.

  The arrangement of each part at the first position P1 is as described above. Therefore, the operator can perform the welding operation while changing the directions of the filler metal B and the welding torch T during the movement from the fourth position P4 to the first position P1.

  As described above, in the angle adjustment device 10 according to the present embodiment, the first adjustment mechanism 30 causes the first pipe 51 to change in the vertical direction as the direction of the first pipe 51 gradually changes from one of the vertical direction and the horizontal direction to the other. The direction of the second pipe 52 is changed by turning the pipe holding part 20 around the center line A2 so that the direction of the second pipe 52 is closer to the horizontal direction H when the side is in the horizontal direction than when it is.

  Thereby, it can suppress that the direction (D1-D4) which bisects the angle ((theta) 1- (theta) 4) which the surface S1 of the 1st pipe 51 and the surface S2 of the 2nd pipe 52 divide into two equal. Thereby, there is little angle adjustment of the filler material B and the welding torch T by an operator, and it becomes unnecessary depending on the case. Therefore, even an operator who does not have the advanced welding skill that has been conventionally required can appropriately perform welding.

  Moreover, in this embodiment, the pipe holding part 20 includes a placement part 21 for placing the workpiece 50 and a shaft part 23 connected to the placement part 21 and extending in the direction of the center line A2. The first adjustment mechanism 30 includes a pedestal 33 that rotatably supports the shaft portion 23, and a shaft 32 that is connected to the pedestal 33 and extends in the direction of the rotation axis A1, and the second adjustment mechanism 40 includes a rotation axis. An annular guide member 41 that is disposed to be inclined with respect to a plane orthogonal to A1, one end of which is connected to the mounting portion 21, and the other end is connected to the guide member 41 as the pipe holding portion 20 rotates. And a linkage member 42 that moves on a circular path while being in contact therewith.

  With such a simple configuration, the orientation of the surface S1 of the first pipe 51 and the surface S2 of the second pipe 52 (θ1 to θ1) by automatically adjusting the orientation of the first pipe 51 and the orientation of the second pipe 52. It is possible to suppress fluctuations in directions D1 to D4 that bisect θ4).

  In the present embodiment, the second adjustment mechanism 40 further includes a biasing portion 43 that biases the linkage member 42 toward the guide member 41. Therefore, when the linkage member 42 moves on the circular track, The linkage member 42 is prevented from being separated from the guide member 41. Thereby, it can suppress that the direction of the 2nd pipe 52 deviates from a desired direction.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment, A various change, improvement, etc. are possible in the range which does not deviate from the meaning.

  For example, in the above-described embodiment, the case where the second adjustment mechanism 40 includes the urging unit 43 is illustrated, but the present invention is not limited thereto. For example, in the second adjustment mechanism 40, the urging unit 43 can be omitted. Specifically, in Modification 1 of FIG. 9, for example, the guide member 41 has a U-shaped cross-sectional shape that opens radially inward. When such a guide member 41 is used, the tip end portion of the rod-like linkage member 42 described above is disposed inside the guide member 41 through the opening of the guide member 41. Thereby, since the linkage member 42 is guided along the guide member 41, the urging portion 43 can be omitted.

  In the second modification of FIG. 10, the guide member 41 includes a pair of ring-shaped wires 41a arranged at a predetermined interval in a direction orthogonal to the radial direction, and a fixing member 41b for fixing them. When such a guide member 41 is used, the tip end portion of the rod-like linkage member 42 described above is disposed between the pair of wire members 41a and 41a. Thereby, since the linkage member 42 is guided along the guide member 41, the urging portion 43 can be omitted.

  In the embodiment, the case where the turntable 31 is provided is illustrated, but the turntable 31 can be omitted.

DESCRIPTION OF SYMBOLS 10 Angle adjustment apparatus 20 Pipe holding part 21 Mounting part 23 Shaft part 30 1st adjustment mechanism 31 Turntable 32 Shaft 33 Base 40 2nd adjustment mechanism 41 Guide member 42 Linking member 43 Energizing part 44 Outer cylinder 50 To-be-welded object 51 First pipe 52 Second pipe A1 Rotating axis A2 Center line of first pipe

Claims (3)

An angle adjusting device that adjusts the orientation of the first pipe (51) and the orientation of the second pipe (52) when welding the end of the second pipe (52) to the side of the first pipe (51). There,
The work piece (50) in which the end of the second pipe (52) is disposed on the side of the first pipe (51) is held with the second pipe (52) facing upward or obliquely upward. A pipe holder (20);
The pipe holding portion (20) is rotated at least once around a rotation axis (A1) orthogonal to the direction of the first pipe (51) and passing through the substantially center of the first pipe (51), and the first pipe ( 51) a first adjustment mechanism (30) for gradually changing the direction of
In conjunction with the rotation of the pipe holding part (20) by the first adjusting mechanism (30), the pipe holding part (20) is turned around the center line (A2) of the first pipe (51) to A second adjustment mechanism (40) for changing the direction of the second pipe (52),
When the second adjustment mechanism (40) is viewed from the front, the orientation of the first pipe (51) gradually changes from one of the vertical arrangement and the horizontal arrangement to the other arrangement. Thus, the direction of the second pipe (52) is closer to the horizontal direction (H) in the horizontal arrangement than in the vertical arrangement, and the one arrangement to the other arrangement. An angle adjusting device that gradually changes the direction of the second pipe (52) in one direction during the change. The pipe holding part (20)
A mounting portion (21) for mounting the workpiece (50);
A shaft portion (23) connected to the placement portion (21) and extending in the direction of the center line (A2),
The first adjustment mechanism (30)
A pedestal (33) that rotatably supports the shaft (23);
A shaft (32) connected to the pedestal (33) and rotating the pedestal (33) about a rotation axis (A1),
The second adjustment mechanism (40)
A linkage member (42) provided in the mounting portion (21);
The angle adjusting device according to claim 1, further comprising a guide member (41) arranged to be inclined with respect to a plane orthogonal to the rotation axis (A1) and guiding the linking member (42).   The angle adjustment device according to claim 2, wherein the second adjustment mechanism (40) further includes a biasing portion (43) that biases the linkage member (42) toward the guide member (41).

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