JP2023129017A - Welding device - Google Patents

Abstract

To provide a welding device configured to rotate a welding jig fixed to a rotating body together with the rotating body, which enables the welding jig to be lifted up to a position where the welding jig is fixed to the rotating body without using a facility arranged independently from the welding device.SOLUTION: A welding device is configured to rotate a welding jig fixed to a rotating body together with the rotating body. The welding device comprises the rotating body, a suspending arm and a mounting mechanism. The rotating body rotates with a rotating shaft disposed along a horizontal direction as a center. The suspending arm suspends the welding jig not fixed to the rotating body down to the rotating body. When the rotating body rotates from a first rotation position to a second rotation position, the mounting mechanism mounts the suspending arm on the rotating body so that the welding jig is lifted up to a position where the jig is fixed to the rotating body.SELECTED DRAWING: Figure 8

Description

The present disclosure relates to a welding device.

For example, as described in Patent Document 1, there is a welding device configured to rotate a welding jig fixed to a rotating body together with the rotating body.

Japanese Patent Application Publication No. 2004-122175

In this type of welding apparatus, the welding jig is replaced depending on the object to be welded. When assembling a welding jig to a welding device, it is necessary to lift the welding jig from above the floor to a position where it is fixed to the rotating body. For example, if the welding jig is heavy, an elevator separate from the welding device is used to lift the welding jig. However, from the viewpoint of equipment costs and other costs, there was a desire to abolish such elevators.

One aspect of the present disclosure is a welding device configured to rotate a welding jig fixed to a rotating body together with the rotating body, in which the welding jig can be attached to the rotating body without using equipment independent of the welding device. Provides technology to enable lifting to a fixed position.

One aspect of the present disclosure is a welding device configured to rotate a welding jig fixed to a rotating body together with the rotating body. The welding device includes a rotating body, a hanging arm, and a mounting mechanism. The rotating body rotates around a rotation axis along the horizontal direction. The hanging arm suspends the welding jig, which is not fixed to the rotating body, from the rotating body. The attachment mechanism attaches the suspension arm to the rotating body so that the welding jig is lifted to a fixed position on the rotating body when the rotating body rotates from the first rotational position to the second rotational position.

According to such a configuration, the welding jig can be lifted to a fixed position on the rotating body using the rotation of the rotating body without using equipment independent of the welding device.

In one aspect of the present disclosure, the attachment mechanism may include an attachment shaft and a hook. The mounting shaft is provided on one of the rotating body and the hanging arm, and extends in the horizontal direction. The hook is provided on the other of the rotating body and the hanging arm, and is hung on the outer peripheral surface of the mounting shaft.

With this configuration, the welding jig can be lifted from the floor to the fixed position on the rotating body as the rotating body rotates from the first rotational position to the second rotational position with a relatively simple structure. It becomes possible.

In one aspect of the present disclosure, the hook may be provided on the rotating body and include a first abutting surface, a second abutting surface, and an intermediate abutting surface. The first contact surface contacts the outer circumferential surface of the mounting shaft from below in the vertical direction when the rotating body is located at the first rotational position. The second contact surface contacts the outer circumferential surface of the mounting shaft from below in the vertical direction when the rotating body is located at the second rotational position. The intermediate contact surface connects the first contact surface and the second contact surface. Further, the intermediate contact surface contacts the outer circumferential surface of the mounting shaft from below in the vertical direction during the process of the rotating body rotating from the first rotation position to the second rotation position.

In one aspect of the present disclosure, the hook may include a first hook portion and a second hook portion. The first hook portion has a recessed portion having a first contact surface formed on at least a portion of the inner surface. Further, the first hook portion may be configured to be able to switch between an open state and a closed state of the open portion of the recess by being displaced with respect to the second hook portion.

According to such a configuration, by closing the opening of the recess when lifting the welding jig, it is possible to prevent the mounting shaft from coming off from the recess and the welding jig from falling. .

One aspect of the present disclosure may further include a fixing mechanism that fixes the welding jig that has been lifted up to the fixing position to the rotating body to the rotating body. The fixing mechanism may include a protrusion and a fitting part. The protrusion is provided on one of the rotating body and the welding jig. The fitting portion is provided on the other of the rotating body and the welding jig, and is configured to be capable of regulating displacement of the welding jig with respect to the rotating body by fitting with the protrusion.

According to such a configuration, it becomes possible to fix the welding jig that has been lifted up to the fixing position to the rotating body to the rotating body with a relatively simple structure.

It is a perspective view of a welding device. FIG. 3 is a front view of the welding device. FIG. 3 is a top view of the welding device. FIG. 3 is a right side view of the welding device. It is a figure which shows a part of connection rotation part. It is a figure which shows a welding jig and a hanging arm. FIG. 7A is a diagram showing the hook in an open state. FIG. 7B is a diagram showing the hook in a closed state. It is a schematic diagram which shows the flow from lifting a welding jig to fixing it to a rotating body. It is a schematic diagram which shows the 1st recessed part and 2nd recessed part of a hook, and the attachment axis of a hanging arm in the process of lifting a welding jig.

Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings.
[1. composition]
A welding apparatus 1 shown in FIGS. 1 to 4 is an apparatus for welding in-vehicle parts such as exhaust system parts for a vehicle. The welding device 1 includes a welding arm 2, a rotating machine 3, a rotating body 4, a welding jig 5, and a hanging arm 6. The welding jig 5 can be attached to and detached from the rotating body 4. Specifically, the welding jig 5 is suspended from the rotating body 4 via the hanging arm 6 while positioned on the floor, and as the rotating body 4 rotates, the welding jig 5 is suspended from the rotating body from above the floor. 4 and is fixed to the rotating body 4. When removing the welding jig 5 from the rotating body 4, the procedure opposite to that when assembling the welding jig 5 to the rotating body 4 is taken. Hereinafter, the rotational position of the rotary body 4 at which the hanging arm 6 can start suspending the welding jig 5 from the rotary body 4 will be referred to as a first rotational position. Further, the rotational position of the rotary body 4 at which the welding jig 5 reaches the fixed position to the rotary body 4 as the rotary body 4 rotates is referred to as a second rotational position. 1 to 4 show a state in which the welding jig 5 is fixed to the rotary body 4 after the rotary body 4 has rotated to the second rotational position. Furthermore, in FIGS. 1 to 3, the welding arm 2 is shown in a simplified manner.

The welding arm 2 is a multi-joint robot arm that performs welding on an object to be welded. The welding arm 2 welds the welding object by moving its tip to the welding location of the welding object.
The rotating machine 3 is a motor that rotates the rotating body 4. In this embodiment, rotating machines 3 are provided on the left and right sides of the welding device 1, respectively, so as to sandwich the rotating body 4 arranged in front of the welding arm 2 from both sides. That is, the welding apparatus 1 of this embodiment includes two rotating machines 3. The two rotary machines 3 are arranged so that the rotation axes X extending left and right when the welding device 1 is viewed from the front coincide with each other, and pivotally support the rotary body 4. When the two rotary machines 3 rotate integrally in synchronization, the rotary body 4 rotates around a rotation axis X along the horizontal direction.

Note that two rotating machines 3 may not be provided as in this embodiment, and only one rotating machine 3 may be provided, for example, on either the left or right side of the welding device 1. In this case, for example, a bearing unit such as a pillow block is provided on the left and right sides of the welding device 1 opposite to the rotating machine 3 side, and the rotating body 4 is supported by the rotating machine 3 and the bearing unit. The rotating body 4 may be configured to rotate around the rotation axis X as the rotating body 4 rotates.

The rotating body 4 includes two connecting rotating parts 41 and a supporting rotating part 42. The two connecting rotating parts 41 are members that are directly connected to each of the two rotating machines 3. The support rotation part 42 is a linearly extending member formed of a plate material. The support rotation section 42 is supported by the two connected rotation sections 41 so that its extending direction is parallel to the rotation axis X of the rotation body 4.

FIG. 5 is a diagram illustrating the left-hand connecting rotating section 41 of the welding device 1 when viewed from the front from the inside of the welding device 1 (that is, the side opposite to the rotating machine 3 side with respect to the connecting rotating section 41). FIG. 5 shows the connecting rotating part 41 and the supporting rotating part 42 in the orientation when the rotating body 4 is located at the second rotating position. Note that, in FIG. 5, illustration of a part of the configuration of the connecting rotation section 41 is omitted. Moreover, the support rotation part 42 is shown in cross section. Below, the upper surface and the lower surface of the coupling rotation part 41 in the state where the rotating body 4 is located in the 2nd rotation position are also simply called the upper surface and the lower surface of the coupling rotation part 41.

As shown in FIG. 5, when the vertical line passing through the rotation axis X of the rotation body 4 is set as the reference line Y of the rotation body 4 when the rotation body 4 is located at the second rotation position, the support rotation part 42 is It is connected to the lower surface of each of the connecting rotating parts 41, and is configured to be movable in parallel along the reference line Y of the rotating body 4 with respect to the connecting rotating parts 41. That is, the support rotation part 42 is located at a close position where it is close to the lower surfaces of the two coupling rotation parts 41 as shown in FIG. It is configured to be movable between a separate position and a separate position.

Further, the connecting rotation section 41 has a fixed section 411. The fixing part 411 is configured to be able to fix the support rotation part 42 located at a nearby position. Specifically, the fixing part 411 has two members 411a and 411b for holding the support rotating part 42 located at a close position from both sides of the reference line Y of the rotating body 4. In the two members 411a and 411b of this embodiment, the cross-sectional shape of the surface facing the support rotation part 42 located in a close position is formed into a U-shape corresponding to the shape of the end surface of the support rotation part 42. There is. The two members 411a and 411b are configured to be movable in parallel by a cylinder 412 so as to approach and move away from the support rotating section 42 located in a proximate position. The two members 411a and 411b are moved in parallel in a direction approaching the end face of the support rotation part 42 located in a close position, and are respectively fitted to the end face of the support rotation part 42 so as to sandwich the support rotation part 42. Parallel movement of the support rotating part 42 along the reference line Y of the rotating body 4 is restricted. Thereby, the support rotation part 42 is fixed in the close position.

In addition, a protrusion 413 that protrudes along the reference line Y of the rotor 4 is formed on the lower surface of the connecting rotary part 41 . The protrusion 413 of this embodiment has a cylindrical shape. As will be described in detail later, when fixing the welding jig 5 to the rotating body 4, the welding jig 5 is placed between the supporting rotating part 42 and the lower surface of the connecting rotating part 41, and 42 is displaced to the close position, the support rotation part 42 pushes the welding jig 5 up toward the protrusion 413 side. As a result, the protruding portion 413 fits into a fitting portion 53 of the welding jig 5, which will be described later, and the position of the welding jig 5 with respect to the rotating body 4 is fixed.

The welding jig 5 shown in FIG. 6 includes one or more jigs (not shown) used for welding by the welding arm 2. The jig used for welding processing is, for example, a fixing jig for fixing a welding object. The welding jig 5 of this embodiment has a structure in which a plurality of jigs (not shown) used for welding are fixed to a planar upper surface of a linearly extending frame portion 51. The welding jig 5 is configured to be detachable from the rotating body 4 so that it can be replaced depending on the object to be welded. During welding by the welding arm 2, the welding jig 5 is lifted from the floor to a fixed position on the rotating body 4 and fixed to the rotating body 4, thereby rotating together with the rotating body 4. When removed from the rotating body 4, the welding jig 5 stands on the floor by rollers 52 attached to both ends of the frame portion 51, and cannot be moved on the floor by being pushed by a person, for example. It is possible.

Furthermore, fitting portions 53 configured to be able to fit with the protruding portion 413 of the aforementioned connecting rotation portion 41 are formed at both ends of the frame portion 51, respectively. The fitting portion 53 of this embodiment is a through hole that penetrates the frame portion 51. The diameter of the through hole is larger than the diameter of the protrusion 413.

The hanging arm 6 is a member for suspending the welding jig 5 from the rotating body 4 when lifting the welding jig 5 before being fixed to the rotating body 4 to a fixed position to the rotating body 4 . In this embodiment, hanging arms 6 are provided at both ends of the frame portion 51 of the welding jig 5, respectively. That is, the welding device 1 of this embodiment includes two hanging arms 6.

Each hanging arm 6 includes an arm portion 61 and a mounting shaft 62. The arm portion 61 is a portion extending perpendicularly from the upper surface of the frame portion 51 at the end portion of the frame portion 51 . The attachment shaft 62 is a portion provided at the tip of the arm portion 61 and has a cylindrical outer shape. When the extending direction of the frame portion 51 is the left-right direction, the mounting shaft 62 is provided so as to extend parallel to the upper surface of the frame portion 51 from the tip of the arm portion 61 outward in the left-right direction. The center axes of the mounting shafts 62 in the left and right hanging arms 6 coincide with each other.

Furthermore, although the outer diameter of the mounting shaft 62 is generally constant, a portion with a smaller outer diameter is formed in the middle portion of the mounting shaft 62 in the axial direction. Below, a portion of the mounting shaft 62 with a small outer diameter will be referred to as a small diameter portion 621, and a portion having a larger outer diameter than the small diameter portions 621 on both sides of the small diameter portion 621 in the axial direction of the mounting shaft 62 will be referred to as a first large diameter portion 622 and a first large diameter portion 622, respectively. This is referred to as a second large diameter portion 623. The outer diameter of the small diameter portion 621 is constant.

Returning to FIGS. 1 to 4, the left and right connecting rotation parts 41 of the rotating body 4 are each provided with a hook 43 that is hooked onto the outer peripheral surface of the mounting shaft 62 of the hanging arm 6. The hook 43 is provided on the upper surface of each connecting rotation part 41. As shown in FIG. 8A, when the rotating body 4 is located at the first rotational position, the rotational body 4 is upside down compared to the state where it is located at the second rotational position, and the connecting rotational part 41 The top surface is directed vertically downward. That is, the hook 43 is directed downward in the vertical direction. The height, position, etc. of the mounting shaft 62 when the welding jig 5 is located on the floor match the left and right hooks 43 of the rotating body 4 located at the first rotational position. As such, the length of the left and right arm portions 61 and the position relative to the frame portion 51 of the hanging arm 6 are designed. Therefore, when the rotating body 4 is located at the first rotational position, the hook 43 can be hung on the outer circumferential surface of the mounting shaft 62 while the welding jig 5 is located on the floor, and the welding jig 5 can be hung on the outer peripheral surface of the mounting shaft 62. The tool 5 can be suspended from the rotating body 4. The hook 43 supports the mounting shaft 62 at a position spaced apart in the radial direction from the rotation axis X of the rotating body 4.

7A and 7B are diagrams of the hook 43 on the left rotating body 4 seen from the outside of the welding device 1 when the welding device 1 is viewed from the front. In FIGS. 7A and 7B, the hook 43 is shown in the orientation when the rotating body 4 is located in the first rotational position.

As shown in FIGS. 7A and 7B, the hook 43 includes a first hook portion 431 in which a first recess 431a is formed, and a second hook portion 432 in which a second recess 432a is formed. The first recess 431a and the second recess 432a are both grooves extending along the rotation axis X of the rotating body 4. Each of the first recess 431a and the second recess 432a has a bottom surface curved in the depth direction of the groove, and two planar side surfaces that are continuous from both edges of the bottom surface and parallel to each other. In the first recess 431a and the second recess 432a of this embodiment, the heights of the two side surfaces are different from each other. That is, the first recess 431a and the second recess 432a of this embodiment have a J-shaped cross section perpendicular to the extending direction (that is, the axial direction of the rotation axis X of the rotating body 4). The width of the first recessed portion 431a and the second recessed portion 432a (that is, the distance between the side surfaces) is wider than the diameter of the small diameter portion 621 of the mounting shaft 62, and wider than the diameter of the first large diameter portion 622 and the second large diameter portion 623. It is also narrowly formed.

The first hook portion 431 and the second hook portion 432 are connected by a connecting shaft 433 parallel to the rotation axis X of the rotating body 4, with the first recess 431a and the second recess 432a facing each other. The first hook portion 431 is configured to be rotatable about a connecting shaft 433 by a cylinder 434. By being displaced with respect to the second hook part 432, the first hook part 431 can be placed in an open state in which the open parts of the first recess 431a and the second recess 432a are open as shown in FIG. 7A, and in an open state as shown in FIG. 7B. It is configured to be switchable between a closed state in which the open portions of the first recess 431a and the second recess 432a are closed as shown in FIG. In the closed state, as shown in FIG. 9A, the inner surface of the first recess 431a and the inner surface of the second recess 432a are continuous, forming an oval hole.

Note that (A) to (C) of FIG. 9 are all schematic diagrams showing the first recess 431a and the second recess 432a and the small diameter portion 621 of the mounting shaft 62 in a closed state. FIG. 9A shows the positional relationship between the first recess 431a, the second recess 432a, and the small diameter portion 621 when the rotating body 4 is located at the first rotational position. FIG. 9B shows the positional relationship of these in an example of a state in which the rotating body 4 is in the middle of rotating from the first rotation position to the second rotation position. (C) of FIG. 9 shows these positional relationships in a state where the rotating body 4 is located at the second rotational position.

[2. How to assemble the welding jig]
Next, a method of assembling the welding jig 5 in which the welding jig 5 is lifted up to a fixed position to the rotating body 4 in the welding apparatus 1 and fixed to the rotating body 4 will be described.

FIG. 8 is a schematic diagram of the rotating body 4, the welding jig 5, and the hanging arm 6 viewed from the left side of the welding apparatus 1. First, as shown in (A) of FIG. 8, in a state in which the support rotation part 42 of the rotary body 4 is located at the separated position and the rotary body 4 itself is located at the first rotation position, the left and right sides of the rotary body 4 are The welding jig 5 is placed on the floor between the connecting rotating parts 41. Specifically, the extending direction of the frame portion 51 is along the rotation axis X of the rotating body 4, and the small diameter portion 621 of the left and right mounting shafts 62 is aligned with the first The welding jig 5 is arranged on the floor surface so as to be located between the recess 431a and the second recess 432a. In the present embodiment, when the rotating body 4 is located at the first rotational position, the hook 43 is located directly below the rotation axis X of the rotating body 4, and the support rotation part 42 is located directly above the rotating body 4. There is.

Then, as shown in FIG. 7B, the first hook portion 431 is rotated around the connecting shaft 433 in a direction approaching the second hook portion 432, and the first hook portion 431 is attached to the outer peripheral surface of the small diameter portion 621 of the mounting shaft 62. The first recess 431a and the second recess 432a are brought into a closed state while bringing their inner surfaces into contact with each other. That is, as shown in FIG. 9A, a part of the inner surface of the first hook portion 431, specifically at least the bottom surface of the first recess 431a, is in a state where the rotating body 4 is located at the first rotation position. This corresponds to the first contact surface 435a that contacts the outer peripheral surface of the mounting shaft 62 from below in the vertical direction.

In each of the left and right hooks 43, the first recess 431a is hung from the vertically lower side onto the outer peripheral surface of the small diameter portion 621 of the mounting shaft 62, so that the welding jig 5 is attached to the rotating body via the left and right hanging arms 6. It is suspended at 4. When the welding jig 5 is suspended from the rotating body 4, the axial direction of the mounting shaft 62 becomes a direction along the horizontal direction.

Moreover, since the widths of the first recess 431a and the second recess 432a are wider than the small diameter part 621 and narrower than the first large diameter part 622 and the second large diameter part 623 on both sides thereof, the first recess 431a and the second When the recess 432a is in the closed state, displacement of the mounting shaft 62 in the axial direction with respect to the hook 43 is restricted. That is, the mounting shaft 62 will not come out of the hole formed by the first recess 431a and the second recess 432a.

Subsequently, the rotating body 4 is rotated from the first rotational position shown in FIG. 8(A) to the second rotational position shown in FIG. 8(D). The rotation angle from the first rotation position to the second rotation position is, for example, 180 degrees. As shown in FIGS. 8(B) and (C), when the rotating body 4 is rotated from the first rotating position to the second rotating position, the welding jig 5 suspended from the rotating body 4 By swinging the mounting shaft 62 relative to the hook 43, it is lifted from the floor while maintaining a hanging state due to its own weight. Specifically, as the rotating body 4 rotates, the welding jig 5 suspended from the rotating body 4 rotates around a rotating axis Z that is parallel to and vertically below the rotating axis X of the rotating body 4. Move upward in parallel. For ease of understanding, FIG. 8B shows a virtual circle centered on the rotation axis X of the rotor 4 and a rotation axis of the welding jig 5 suspended from the rotor 4. A virtual circle centered on Z is shown by a two-dot chain line.

Since the mounting shaft 62 swings relative to the hook 43 during the rotation of the rotating body 4 from the first rotation position to the second rotation position, the orientation of the hole formed by the first recess 431a and the second recess 432a changes with respect to the mounting shaft 62. That is, the portions of the inner surfaces of the first hook portion 431 and the second hook portion 432 that contact the outer peripheral surface of the small diameter portion 621 of the mounting shaft 62 change. For example, in the state shown in FIG. 9B, a part of the inner surface of the second hook portion 432, specifically one side surface of the second recess 432a, is perpendicular to the outer circumferential surface of the small diameter portion 621 of the mounting shaft 62. Contact from below. That is, at least one side surface of the second recess 432a is an intermediate contact surface that contacts the outer circumferential surface of the mounting shaft 62 from the bottom in the vertical direction during the rotation of the rotating body 4 from the first rotation position to the second rotation position. 435b. The intermediate contact surface 435b is continuous from the first contact surface 435a described above.

As shown in FIG. 8D, when the rotating body 4 reaches the second rotational position, the welding jig 5 suspended from the rotating body 4 is in a fixed position to the rotating body 4. In this embodiment, when the rotating body 4 is located at the second rotational position, the hook 43 is located directly above the rotational axis X of the rotating body 4, and the supporting rotation part 42 is located directly below the rotational axis X of the rotating body 4. It is located in

In addition, when the rotating body 4 is located at the second rotational position, as shown in FIG. , is in contact with the outer circumferential surface of the small diameter portion 621 of the mounting shaft 62 from below in the vertical direction. That is, at least the bottom surface of the second recess 432a corresponds to a second contact surface 435c that contacts the outer circumferential surface of the mounting shaft 62 from below in the vertical direction when the rotating body 4 is located at the second rotational position. The second contact surface 435c is continuous from the intermediate contact surface 435b to the side opposite to the first contact surface 435a.

Subsequently, as shown in FIG. 8E, the support rotating part 42 of the rotating body 4 is translated vertically upward (that is, toward the lower surface side of the connecting rotating part 41) to a close position. As a result, the frame portion 51 of the welding jig 5 is pushed up from below in the vertical direction by the support rotation portion 42, and the fitting portion 53 of the welding jig 5 fits into the protrusion portion 413 of the rotating body 4. As a result, the position of the welding jig 5 with respect to the rotating body 4 is fixed.

Note that the welding jig 5 suspended from the rotating body 4 swings slightly around the mounting shaft 62 while maintaining a hanging posture due to its own weight. There may be cases where it is difficult. For this reason, for example, in order to make it easier to fit the fitting part 53 into the protruding part 413, an interference part that interferes with the welding jig 5 when the welding jig 5 reaches the fixed position to the rotating body 4 is removed. It may also be provided on the rotating body 4. For example, when the interference part interferes with the interfered part 54 (see FIG. 6) provided on the welding jig 5, the swinging of the welding jig 5 in one direction around the swing axis 62 is restricted. . Therefore, it is possible to easily fit the fitting portion 53 into the protruding portion 413. Alternatively, for example, by rotating the rotating body 4 over 180 degrees from the first rotational position and having the welding jig 5 lean against the interference part of the rotating body 4, the position of the rotating body 4 is regulated and the fitting is completed. It is also possible to make it easier to fit the portion 53 into the protrusion 413.

After the fitting part 53 fits into the protruding part 413 and the position of the welding jig 5 with respect to the rotating body 4 is fixed, the two members 411a and 411b that constitute the fixed part 411 are displaced to fix the supporting rotating part 42. By holding it in the horizontal direction, the support rotation part 42 is fixed at a close position. Since the support rotation part 42 is in contact with the welding jig 5 from below in the vertical direction, by fixing the support rotation part 42 in a close position, the fitting part 53 and the protrusion part are separated by the weight of the welding jig 5. Disengagement from the fitting with 413 is suppressed.

When fixed to the rotating body 4 , the welding jig 5 rotates integrally with the rotating body 4 around the rotation axis X of the rotating body 4 .

[3. effect]
According to the embodiment detailed above, the following effects can be obtained.
(3a) The welding device 1 includes a rotating body 4 provided with a hook 43, and a hanging arm 6 provided with a mounting shaft 62 extending in the horizontal direction. The hook 43 is configured to be able to swing relative to the mounting shaft 62 as the rotating body 4 rotates from the first rotational position to the second rotational position when hooked onto the outer peripheral surface of the mounting shaft 62 . As the rotor 4 rotates from the first rotation position to the second rotation position, the welding jig 5 suspended from the rotating body 4 by the hook 43 and the mounting shaft 62 maintains a hanging state due to its own weight and is attached to the floor. It is lifted from the surface to a fixed position on the rotating body 4. In other words, the hook 43 and the mounting shaft 62 rotate the rotor 4 from the first rotation position to the second rotation position, so that the welding jig 5 can be attached to the rotor 4 from above the floor while maintaining a hanging posture due to its own weight. An attachment mechanism is configured to attach the hanging arm 6 to the rotating body 4 so that it can be lifted up to the fixed position.

According to such a configuration, the welding process can be performed by utilizing the rotation of the rotating body 4 (in other words, by using the rotating machine 3 that rotates the rotating body 4) without using an elevator independent of the welding device 1. The tool 5 can be lifted to a fixed position on the rotating body 4.

(3b) The hook 43 is provided on the rotating body 4 and has a first contact surface 435a, a second contact surface 435c, and an intermediate contact surface 435b. The first contact surface 435a contacts the outer circumferential surface of the mounting shaft 62 from below in the vertical direction when the rotating body 4 is located at the first rotational position. Second contact surface 4
35c contacts the outer circumferential surface of the mounting shaft 62 from below in the vertical direction when the rotating body 4 is located at the second rotational position. The intermediate contact surface 435b connects the first contact surface 435a and the second contact surface 435c. The intermediate contact surface 435b contacts the outer circumferential surface of the mounting shaft 62 from below in the vertical direction during the rotation of the rotating body 4 from the first rotation position to the second rotation position.

According to such a configuration, the welding jig 5 can be moved from the floor surface to the fixed position on the rotating body 4 as the rotating body 4 rotates from the first rotational position to the second rotational position with a relatively simple structure. It becomes possible to lift it.

(3c) The hook 43 includes a first hook portion 431 in which a first recess 431a having a first contact surface 435a is formed in a part of the inner surface, and a second hook portion 432. The first hook portion 431 is configured to be able to switch between an open state in which the opening of the first recess 431a is open and a closed state in which the open portion of the first recess 431a is closed by being displaced with respect to the second hook portion 432.

According to such a configuration, by bringing the welding jig 5 into the closed state when lifting it, it is possible to suppress the attachment shaft 62 from coming off from the first recess 431a and the welding jig 5 from falling. .

(3d) The welding device 1 includes a protrusion 413 provided on the rotating body 4 and a fitting portion 53 provided on the welding jig 5. The fitting part 53 is configured to be able to regulate displacement of the welding jig 5 with respect to the rotating body 4 by fitting with the protruding part 413 . That is, the protruding portion 413 and the fitting portion 53 constitute a fixing mechanism that fixes the welding jig 5 lifted to the fixing position to the rotating body 4 to the rotating body 4.

According to such a configuration, it becomes possible to fix the welding jig 5 that has been lifted up to the fixing position to the rotating body 4 to the rotating body 4 with a relatively simple structure.

[4. Other embodiments]
Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above embodiments and can take various forms.

(4a) In the above embodiment, the first hook portion 431 is configured to be able to switch the open/closed states of the open portions of the first recess 431a and the second recess 432a by being displaced with respect to the second hook portion 432. There is. When the welding jig 5 is lifted to the fixed position on the rotating body 4, the first hook portion 431 is placed in a state where the open portion of the first recess 431a is closed. It is not necessary to keep the opening in the closed state. For example, when lifting the welding jig to a position where it is fixed to the rotating body, a gap may be created between the first hook part and the second hook part to the extent that the mounting shaft cannot pass through.

(4b) In the above embodiment, the hook 43 includes the first hook part 431 and the second hook part 432, but the hook does not necessarily have to be composed of a plurality of members. For example, the hook may be a single member having a recess formed therein that includes each of the first abutment surface, the second abutment surface, and the intermediate abutment surface.

(4c) In the above embodiment, the attachment mechanism includes the hook 43 and the attachment shaft 62. Specifically, a configuration in which the hook 43 is provided on the rotating body 4 and the attachment shaft 62 is provided on the hanging arm 6 has been illustrated, but for example, a configuration in which the objects on which the hook and the attachment shaft are provided are reversed (i.e., The hook may be provided on the hanging arm, and the mounting shaft may be provided on the rotating body. In this case, the hook contacts the outer circumferential surface of the mounting shaft from above in the vertical direction, and swings relative to the mounting shaft as the rotating body rotates from the first rotational position to the second rotational position. The welding jig suspended from the welding tool is lifted to a fixed position on the rotating body while maintaining its hanging position due to its own weight. Moreover, the attachment mechanism may be realized by a configuration other than the combination of the hook and the attachment shaft.

(4d) In the above embodiment, a configuration including the protruding portion 413 and the fitting portion 53 is illustrated as the fixing mechanism. Specifically, a configuration in which the protruding portion 413 is provided on the rotating body 4 and the fitting portion 53 is provided on the welding jig 5 has been illustrated, but for example, the objects on which the protruding portion and the fitting portion are provided may be reversed. (that is, a configuration in which the protruding portion is provided on the welding jig and the fitting portion is provided on the rotating body). Moreover, the fixing mechanism may be realized by a configuration other than the combination of the protruding part and the fitting part.

Furthermore, the welding device does not necessarily have to include such a fixing mechanism. For example, a welding jig that has been lifted from the floor to a position where it is fixed to the rotating body may be fixed to the rotating body by a person.

(4e) The function of one component in the above embodiment may be distributed as multiple components, or the functions of multiple components may be integrated into one component. Further, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the above embodiment may be added to, replaced with, etc. in the configuration of other embodiments.

DESCRIPTION OF SYMBOLS 1... Welding device, 2... Welding arm, 3... Rotating machine, 4... Rotating body, 41... Connecting rotation part, 413... Projection part, 42... Support rotation part, 43... Hook, 431... First hook part, 431a... 1st recessed part, 432... 2nd hook part, 432a... 2nd recessed part, 435a... 1st contact surface, 435b... intermediate contact surface, 435c... 2nd contact surface, 5... welding jig, 53... fitting Part, 6... Hanging arm, 61... Arm part, 62... Mounting shaft.

Claims (5)

A welding device configured to rotate a welding jig fixed to a rotating body together with the rotating body,
The rotating body rotates around a rotation axis along the horizontal direction;
a hanging arm for suspending the welding jig that is not fixed to the rotating body from the rotating body;
a mounting mechanism for attaching the suspension arm to the rotating body so that the welding jig is lifted to a fixed position on the rotating body when the rotating body rotates from a first rotational position to a second rotational position; ,
A welding device equipped with. The welding device according to claim 1,
The mounting mechanism includes:
a mounting shaft provided on one of the rotating body and the hanging arm and extending along the horizontal direction;
a hook provided on the other of the rotating body and the hanging arm and hung on the outer peripheral surface of the mounting shaft;
A welding device equipped with. The welding device according to claim 2,
The hook is provided on the rotating body, and
a first contact surface that contacts the outer circumferential surface of the mounting shaft from below in the vertical direction when the rotating body is located at the first rotational position;
a second contact surface that contacts the outer circumferential surface of the mounting shaft from below in the vertical direction when the rotating body is located at the second rotational position;
an intermediate contact surface connecting the first contact surface and the second contact surface, the intermediate contact surface connecting the first contact surface and the second contact surface; the intermediate contact surface that contacts the surface from the bottom in the vertical direction;
Welding equipment. The welding device according to claim 3,
The hook is
a first hook portion having a recessed portion having the first contact surface formed in at least a portion of the inner surface;
a second hook part;
Equipped with
In the welding device, the first hook portion is configured to be able to switch between an open state and a closed state of the open portion of the recessed portion by being displaced with respect to the second hook portion. The welding device according to any one of claims 1 to 4,
further comprising a fixing mechanism for fixing the welding jig lifted to the fixing position to the rotating body to the rotating body,
The fixing mechanism is
a protrusion provided on one of the rotating body and the welding jig;
a fitting part provided on the other of the rotating body and the welding jig and configured to be able to regulate displacement of the welding jig with respect to the rotating body by fitting with the protrusion;
A welding device equipped with.

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