Electrode tip dismounting device

Abstract

The electrode tip detaching device (1) includes a sliding member (5), a gear (8), first and second detaching members (6A, 6B). The gear (8) has a first guide groove (8a) that guides a protrusion (6a) of the first detaching member (6A) at the time of rotation, and a second guide groove (8b) that guides a protrusion (6a) of the second detaching member (6B). The first and second guide grooves (6A, 6B) are shaped such that the region on one side of the guide direction is the same distance from the rotation axis (X1), and the region on the other side of the guide direction is shaped such that the distance from the rotation axis (X1) gradually increases as it approaches the other end.

Description

Technical Field

[0001] The present invention relates to an electrode head removal device capable of removing the electrode head from the gun body of a spot welding gun. Background Technology

[0002] Previously, electrode tips mounted on spot welding guns would develop oxide films or wear after repeated spot welding, necessitating periodic trimming using an electrode tip dresser. Furthermore, the length of the periodically trimmed electrode tip would gradually shorten, eventually rendering it unusable. Therefore, it was essential to remove it from the gun body at specified intervals and install a new electrode tip. This removal of the electrode tip from the gun body was typically performed using an electrode tip removal device.

[0003] For example, the electrode head removal device disclosed in Patent Document 1 includes: a pair of removal members, each having a set of protrusions extending horizontally to both sides; and a rod-shaped arm member, with a pair of first guide grooves on one end of the arm member respectively guiding each protrusion of one removal member, and a pair of second guide grooves respectively guiding each protrusion of the other removal member. Each first guide groove is configured to guide each protrusion of one removal member when the arm member is rotated to one side about each protrusion of the other removal member, so as to separate one removal member from the other. On the other hand, each second guide groove is configured to guide each protrusion of the other removal member when the arm member is rotated to the other side about each protrusion of one removal member, so as to separate the other removal member from the first removal member.

[0004] Furthermore, while engaging the two disassembly components with the gun body and electrode head respectively in the engaged state, the other end of the operating arm component is turned to rotate the arm component to either side, thereby separating the two disassembly components along the central axis of the electrode head and removing the electrode head from the gun body.

[0005] Existing technical documents Patent documents Patent Document 1: International Publication No. 2017 / 130235 Summary of the Invention The technical problem that the invention aims to solve However, the electrode head removal device in Patent Document 1 employs a structure in which the arm members rotate around the protrusions of either removal member. Therefore, when removing the electrode head from the gun body, the load on each removal member caused by the reaction force from the gun body or the electrode head is concentrated around the protrusions of each removal member, which become the center of rotation. Consequently, to prevent deformation or breakage during repeated use, the two removal members must be enlarged to increase rigidity, thus sacrificing operability and weight.

[0006] The present invention was made in view of the above circumstances, and its object is to provide an electrode head removal device that is compact and lightweight and is not prone to failure even with repeated use.

[0007] Solution to the above technical problems To achieve the above objectives, the present invention is characterized by providing a component different from the two disassembly components between the two disassembly components, and employing a structure in which the component moves integrally with either of the disassembly components during the disassembly operation of the electrode head.

[0008] Specifically, the following countermeasures were taken for an electrode head removal device that removes the electrode head from the gun body by fitting it onto the gun body of a spot welding gun.

[0009] That is, the electrode head disassembly device according to the first invention is characterized by comprising: a sliding member capable of sliding in a predetermined direction; a rotation operation mechanism having a rotating body rotatably mounted on the sliding member about a rotation axis extending in a direction orthogonal to the sliding direction of the sliding member, and operating the rotation of the rotating body; and first and second disassembly members disposed at a position separated from the sliding member in the sliding direction of the sliding member, and capable of sliding in the same direction as the sliding member, and capable of engaging with the gun body and the electrode head in an engaged state respectively, wherein one of the rotating body and the first disassembly member has a first protrusion protruding in the same direction as the rotation axis, and the other has a protrusion capable of... A first guide groove is provided to guide the first protrusion during the rotation of the rotating body. A second protrusion protrudes in the same direction as the rotation axis on one side of the rotating body and the second disassembly member, and a second guide groove is provided on the other side to guide the second protrusion during the rotation of the rotating body. The first and second guide grooves are symmetrical in shape with respect to the sliding member. The guiding direction side area of ​​the first and second guide grooves is set to be the same distance from the rotation axis in the circumferential direction of the rotating body. On the other hand, the guiding direction side area of ​​the first and second guide grooves is set to gradually increase in distance from the rotation axis as it moves towards the other end in the circumferential direction of the rotating body.

[0010] In this electrode head removal device, when the rotating body is rotated clockwise by operating the rotation mechanism, it functions as follows: the first protrusion is guided to one side of the first guide groove, and the first removal member slides integrally with the sliding member without separating from it; conversely, the second protrusion is guided to the other side of the second guide groove, and the second removal member gradually separates from the sliding member while sliding in the same direction as the sliding member. Furthermore, when the rotating body is rotated counterclockwise by operating the rotation mechanism, it functions as follows: the second protrusion is guided to one side of the second guide groove, and the second removal member slides integrally with the sliding member without separating from it; conversely, the first protrusion is guided to the other side of the first guide groove, and the first removal member gradually separates from the sliding member while sliding in the same direction as the sliding member.

[0011] The second invention relates to an electrode head disassembly device characterized in that, in the first invention, the rotating operating mechanism cooperates with the sliding member to be configured such that: the rotating body rotates clockwise in conjunction with the sliding action of the sliding member to one side, and the rotating body rotates counterclockwise in conjunction with the sliding action of the sliding member to the other side.

[0012] In this electrode head removal device, when the first and second removal members are engaged with the gun body and electrode head in their fitted state, moving the gun body via the first removal member to slide the sliding member to one side causes the rotating body to rotate clockwise. Conversely, when the first and second removal members are engaged with the gun body and electrode head in their fitted state, moving the gun body via the second removal member to slide the sliding member to the other side causes the rotating body to rotate counterclockwise.

[0013] The third invention relates to an electrode head removal device characterized in that, in the second invention, the rotary operating mechanism has a rack extending in the sliding direction of the sliding member, and the rotating body is a gear meshing with the rack.

[0014] In an electrode head removal device constructed in this way, it serves to make the device shorter by designing it in a direction orthogonal to the long side of the rack.

[0015] The fourth invention relates to an electrode head disassembly device characterized in that, in the first invention, a pair of first force-applying members are provided to apply force to the first and second disassembly members toward a side that is close to each other.

[0016] In an electrode head removal device configured like this, when the electrode head is removed from the gun body, it serves to bring the first and second removal components closer together and back to their original positions due to the force applied.

[0017] The fifth invention relates to an electrode head disassembly device characterized in that, in the fourth invention, it includes a guide rod extending in the sliding direction of the sliding member, and guide holes are formed on the first and second disassembly members for the guide rod to be guidedly inserted. The first force-applying member is a helical spring wound and installed on the guide rod.

[0018] In this electrode head removal device, the guide rod, which guides the sliding motion of the first and second removal components, is located inside the helical spring that returns the first and second removal components to their original positions. Additionally, it serves to evenly distribute the force of the helical spring around the guide rod of the first and second removal components.

[0019] The sixth invention relates to an electrode head disassembly device characterized in that, in the fifth invention, the first and second disassembly members are provided with claws capable of being inserted into the gap between the gun body and the electrode head.

[0020] In an electrode head disassembly device configured in this way, the claws of the first and second disassembly members are inserted into the gap between the gun body and the electrode head, and the first and second disassembly members are separated. This results in one claw of the first and second disassembly members hooking and engaging with the gun body, and the other claw of the first and second disassembly members hooking and engaging with the electrode head.

[0021] The seventh invention relates to an electrode head disassembly device characterized in that, in the fifth or sixth invention, in the first and second disassembly members, the area around the opening of the guide hole on the side corresponding to each of the helical springs is stepped recessed compared to other areas.

[0022] In an electrode head disassembly device configured in this way, it serves to increase the external shape of the parts of the first and second disassembly components that do not correspond to the helical springs, while simultaneously bringing the arrangement spaces of the two helical springs closer together.

[0023] The electrode head disassembly device of the eighth invention is characterized in that, in the first invention, a second force-applying member is provided at one end of the first and second disassembly members, which can apply a force to the electrode head in a direction intersecting its central axis during the disassembly operation.

[0024] In an electrode head removal device configured in this way, when the electrode head is removed from the gun body, it serves to cause the electrode head to spring away from the first and second removal components due to the force of the second force-applying member.

[0025] The ninth invention relates to an electrode head disassembly device characterized in that, in the eighth invention, the second force-applying member is a leaf spring.

[0026] In an electrode head removal device configured in this way, it serves to make the space occupied in the direction of applied force smaller than that of a helical spring, for example, capable of applying the same force.

[0027] Invention Effects In the electrode head removal device of the first invention, when the rotating operating mechanism is operated to rotate the rotating body forward while the first and second removal members are engaged with the gun body and the electrode head in the engaged state, respectively, the first protrusion is guided to the guiding direction side region of the first guide groove. At this time, since the guiding direction side region of the first guide groove is shaped to be the same distance from the rotation axis in the circumferential direction of the rotating body, the first removal member slides integrally with the sliding member without separating from it. On the other hand, when the rotating body rotates forward, the second protrusion is guided to the guiding direction side region of the second guide groove. At this time, since the guiding direction side region of the second guide groove is shaped to be gradually farther from the rotation axis as it moves towards the other end in the circumferential direction of the rotating body, the second removal member gradually separates from the sliding member while sliding in the same direction as the sliding member. In this way, a force is applied to the gun body and the electrode head in the direction of separation, thereby removing the electrode head from the gun body. Conversely, when the rotating mechanism is operated to reverse the rotating body while the first and second disassembly members are engaged with the gun body and electrode head in their respective engaged states, the second protrusion is guided to the guiding direction side of the second guide groove. At this time, since the guiding direction side of the second guide groove is shaped to be the same distance from the rotation axis in the circumferential direction of the rotating body, the second disassembly member slides integrally with the sliding member without separating from it. On the other hand, when the rotating body reverses, the first protrusion is guided to the other guiding direction side of the first guide groove. At this time, since the other guiding direction side of the first guide groove is shaped to gradually increase in distance from the rotation axis towards the other end in the circumferential direction of the rotating body, the first disassembly member gradually separates from the sliding member while sliding in the same direction as the sliding member. In this case, force is applied to the gun body and electrode head in the direction of separation, thereby removing the electrode head from the gun body. In this configuration, during electrode head disassembly, the structure employs a rotating body that rotates around a sliding member located between the first and second disassembly components. Since the sliding member slides integrally with either the first or second disassembly component, even if the load on the first and second disassembly components from the reaction force of the gun body or the electrode head is concentrated around the rotation center of the rotating body, the rigidity around the sliding member is increased, making it less prone to deformation. Therefore, it is not necessary to enlarge the first and second disassembly components separately to increase rigidity, allowing for the manufacture of a compact and lightweight electrode head disassembly device that is less prone to failure even with repeated use.

[0028] In the electrode head removal device of the second invention, when the first and second removal members are engaged with the gun body and electrode head in the engaged state, if the gun body is moved by the first removal member to slide the sliding member to one side, the rotating body rotates clockwise, separating the first and second removal members, thereby removing the electrode head from the gun body. Conversely, when the first and second removal members are engaged with the gun body and electrode head in the engaged state, if the gun body is moved by the second removal member to slide the sliding member to the other side, the rotating body rotates counterclockwise, separating the first and second removal members, thereby removing the electrode head from the gun body. In this way, a non-powered electrode head removal device can be manufactured that removes the electrode head from the gun body simply by moving the spot welding gun.

[0029] In the electrode head removal device of the third invention, the size of the device can be designed to be shorter along a direction orthogonal to the long side of the rack. Therefore, the device can be made compact along a direction orthogonal to the long side of the rack.

[0030] In the electrode head removal device of the fourth invention, when the electrode head is removed from the gun body, the first and second removal components approach each other and return to their original positions due to the force of the first force-applying component. Therefore, the removal operation of the next electrode head can be smoothly transitioned.

[0031] In the electrode head removal device of the fifth invention, since the guide rod that guides the sliding motion of the first and second removal components is located inside the helical spring that returns the first and second removal components to their original positions, the structure around the guide rod can be made compact. In addition, since the force of the helical spring is evenly transmitted around the guide rod of the first and second removal components, the first and second removal components can slide smoothly.

[0032] In the electrode head removal device of the sixth invention, when the claws of the first and second removal components are inserted into the gap between the gun body and the electrode head and the first and second removal components are separated, one claw of the first and second removal components hooks and engages with the gun body, while the other claw hooks and engages with the electrode head, thereby removing the electrode head from the gun body. In this way, during the electrode head removal operation, the first and second removal components can be easily engaged with the gun body and the electrode head, enabling efficient electrode head removal.

[0033] In the electrode head disassembly device of the seventh invention, by increasing the shape of the parts of the first and second disassembly members that do not correspond to the helical springs, and by bringing the arrangement spaces of the two helical springs closer to each other, the rigidity of the first and second disassembly members can be ensured, and the device can be made compact in the long side direction of the guide rod.

[0034] In the electrode head removal device of the eighth invention, when the electrode head is removed from the gun body, the electrode head is propelled away from the first and second removal components by the force of the second force-applying member. Therefore, the removed electrode head can be efficiently removed from the first and second removal components or from around the gun body.

[0035] In the electrode head removal device of the ninth invention, the space occupied in the direction of applied force is smaller than that of a helical spring, for example, capable of applying the same force. Therefore, the structure around the electrode head removal in the first and second removal members can be made more compact. Attached Figure Description

[0036] Figure 1 This is a perspective view showing an electrode head disassembly device according to an embodiment of the present invention.

[0037] Figure 2 yes Figure 1 A sectional view at line II-II.

[0038] Figure 3 yes Figure 1 A cross-sectional view at line III-III.

[0039] Figure 4 This shows the state of one electrode tip before it is about to be removed from the spot welding gun, and... Figure 2 A fairly accurate diagram.

[0040] Figure 5 It is shown in Figure 4 The following image shows the state of the spot welding gun immediately after one of the electrode tips was removed.

[0041] Figure 6 This shows the state before the other electrode head of the spot welding gun is removed, and... Figure 2 A fairly accurate diagram.

[0042] Figure 7 It is shown in Figure 6 The following image shows the state of the spot welding gun immediately after the other electrode head was removed.

[0043] Figure 8 yes Figure 1 The VIII view.

[0044] Figure 9 It is shown in Figure 8 The following diagram shows the state of the first and second disassembled components separated. Detailed Implementation

[0045] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, the following description of preferred embodiments is merely illustrative in nature.

[0046] Figure 1 An electrode tip removal device 1 according to an embodiment of the present invention is shown. This electrode tip removal device 1 is used, for example, when removing an electrode tip E from the gun body 21 of a spot welding gun 20 mounted on the front end of the robotic arm of an industrial robot (not shown), and includes: a main body housing 2 having an internal receiving space S1 and being a generally rectangular cuboid shape with an opening on the front surface; and a removal unit 3, which is housed in the receiving space S1.

[0047] At the front end of the gun body 21 of the spot welding gun 20, a pair of grips 22 are arranged opposite each other. Each grip 22 is composed of a cylindrical large-diameter portion 22a and a small-diameter portion 22b continuously arranged with the large-diameter portion 22a, and the center lines of the large-diameter portion 22a and the small-diameter portion 22b are aligned.

[0048] The electrode head E is fitted onto the small diameter portion 22b by means of a gap G formed between it and the large diameter portion 22a. The central axis C1 of the electrode head E is aligned with the center line of the large diameter portion 22a and the small diameter portion 22b.

[0049] like Figure 2 and Figure 3 As shown, the disassembly unit 3 includes: a pair of guide rods 4 in the shape of round bars; a sliding member 5 in the shape of a generally rectangular plate with thickness; a first disassembly member 6A and a second disassembly member 6B respectively disposed on the upper and lower sides of the sliding member 5 with respect to the sliding member 5 and in a generally hook-shaped manner in side view; a rotation operation mechanism 9 having two sets of racks 7 and gears 8 (rotating bodies); and a pair of helical springs 10 (first force-applying members) wound and mounted on one of the guide rods 4.

[0050] The guide rod 4 extends from the upper surface inside the main body housing 2 to the lower surface, and is arranged at predetermined intervals along the front-back direction of the main body housing 2.

[0051] The sliding member 5 is arranged in the approximate center of the accommodating space S1 with its long side direction aligned with the front-rear direction of the main body shell 2 and each plate surface facing up and down. It also has through holes 5a formed at predetermined intervals along its long side direction.

[0052] In each through hole 5a, a guide rod 4 is inserted in a manner that can guide the sliding member 5, and the sliding member 5 can slide up and down along the two guide rods 4.

[0053] The first disassembly member 6A has a main frame 6a that extends along the front-rear direction of the main body shell 2 and has a shape in which the front half is thicker in the vertical direction than the rear half. That is, the upper surface of the rear half of the first disassembly member 6A is formed into a stepped surface 6b that is recessed downward in a stepped manner compared with the upper surfaces of other areas.

[0054] On the main frame 6a, guide holes 6c are formed at approximately the center of the front half and the center of the rear half, respectively, extending vertically. That is, one of the guide holes 6c opens onto the stepped surface 6b. In each guide hole 6c, a guide rod 4 is inserted in a manner that allows the first disassembly member 6A to be guided. The first disassembly member 6A can slide vertically along the two guide rods 4 in the same direction as the sliding member 5.

[0055] In the lower part of the center of each side of the main frame 6a, there are pins 6d that protrude in opposite directions along the width direction of the main body shell 2, and each pin 6d is symmetrically arranged in the width direction of the main body shell 2.

[0056] like Figure 8 As shown, on the front side of the first disassembly member 6A, there is a hook portion 6e that branches into two strands towards the front end and is roughly U-shaped when viewed from above.

[0057] The hook portion 6e has a pair of protruding frames 6f that protrude parallel to the front of the main body frame 6a from each side edge of the front surface of the main body frame 6a, and the two protruding frames 6f and the front surface of the main body frame 6a form a fitting recess 60 that opens forward.

[0058] At approximately halfway along the front end of one of the protruding frames 6f, there is a first claw portion 6g that is approximately rectangular in shape, extending downward and projecting outward toward the other protruding frame 6f, the thickness of which is a dimension corresponding to the gap G.

[0059] In addition, a first protrusion 6h for height adjustment in the shape of a disc is provided on the back side of the base end of the first claw portion 6g.

[0060] On the other hand, at approximately half of the base end of the other protruding frame 6f, at the lower edge of the protruding frame 6f side, there is a generally trapezoidal plate-shaped second claw portion 6i that extends downward and protrudes into the protruding frame 6f and is connected to the front surface of the main frame 6a. The thickness of the second claw portion 6i is the same as that of the first claw portion 6g, corresponding to the gap G.

[0061] Additionally, on the back side of the base end of the other protruding frame 6f, a second protrusion 6j in the shape of a disc for height adjustment is provided.

[0062] Furthermore, a leaf spring 6k (second force-applying member) is installed on the front surface of the main frame 6a, which extends at an angle towards the lower surface and gradually moves away from the main frame 6a.

[0063] Since the second disassembly member 6B has the same structure as the first disassembly member 6A, except that it is arranged vertically opposite to the first disassembly member 6A, it is labeled with the same reference numerals as the first disassembly member 6A, and detailed description is omitted. Furthermore, each pin 6d of the first disassembly member 6A constitutes a first protrusion of the present invention, and each pin 6d of the second disassembly member 6B constitutes a second protrusion of the present invention.

[0064] When the first disassembly member 6A and the second disassembly member 6B are brought into close proximity, such as Figure 8 As shown, the first claw portion 6g and the second claw portion 6i in the first disassembly member 6A and the first claw portion 6g and the second claw portion 6i in the second disassembly member 6B are arranged in a row along the fitting recess 60.

[0065] With the first disassembly member 6A and the second disassembly member 6B in a close proximity, when the spot welding gun 20 approaches the first disassembly member 6A and the second disassembly member 6B, the first claw portion 6g and the second claw portion 6i of the first disassembly member 6A and the second disassembly member 6B are inserted into the gap G between the large diameter portion 22a and the electrode head E (refer to...). Figure 4 and Figure 6 ).

[0066] When the first claw 6g and the second claw 6i of the first disassembly member 6A and the second disassembly member 6B are inserted into the gap G, each leaf spring 6k undergoes elastic deformation through either the large-diameter portion 22a or the electrode head E. That is, the leaf spring 6k can apply a force to the electrode head E in a direction intersecting its central axis C1 during the disassembly operation.

[0067] Furthermore, with each first claw portion 6g and each second claw portion 6i in the first disassembly member 6A and the second disassembly member 6B inserted into the gap G, when the first disassembly member 6A and the second disassembly member 6B are as follows: Figure 9 When the separation is shown, the first disassembly component 6A and the second disassembly component 6B are hooked onto the large-diameter portion 22a of the gun body 21 and the electrode head E, respectively, so that the electrode head E is removed from the small-diameter portion 22b of the gun body 21.

[0068] like Figure 2 As shown, the helical springs 10 are respectively wound around the upper and lower regions of the guide rod 4 located on the back side of the main body housing 2, and correspond to the stepped surfaces 6b of the first disassembly member 6A and the second disassembly member 6B, respectively. That is, the helical spring 10 located on the upper side applies a downward force to the stepped surface 6b of the first disassembly member 6A, while the helical spring 10 located on the lower side applies an upward force to the stepped surface 6b of the second disassembly member 6B, and the two helical springs 10 apply force to the first disassembly member 6A and the second disassembly member 6B towards each other.

[0069] The racks 7 are mounted in pairs on the back of the main housing 2, extending vertically and horizontally, at positions separated from the sliding member 5, the first disassembly member 6A, and the second disassembly member 6B. That is, each rack 7 extends along the sliding direction of the sliding member 5.

[0070] A pair of gears 8 are provided at positions separated from the sliding member 5, the first disassembly member 6A, and the second disassembly member 6B. They are respectively mounted on the sliding member 5 so that they can rotate about a rotation axis X1, which extends in a direction orthogonal to the sliding direction of the sliding member 5, that is, in the same direction as the protrusion direction of each pin 6d.

[0071] Each gear 8 has a first guide groove 8a and a second guide groove 8b that open on opposite sides of each other. The first guide groove 8a and the second guide groove 8b are symmetrical about the axis of rotation X1.

[0072] The pin 6d of the first disassembly member 6A is fitted into the first guide groove 8a, which guides the pin 6d of the first disassembly member 6A during the rotation of the gear 8. One side of the first guide groove 8a, in the circumferential direction of the gear 8, is shaped such that it is at the same distance from the rotation axis X1. On the other hand, the other side of the first guide groove 8a, in the circumferential direction of the gear 8, is shaped such that the distance from the rotation axis X1 gradually increases towards the other end.

[0073] The pin 6d of the second disassembly member 6B is fitted into the second guide groove 8b, which guides the pin 6d of the second disassembly member 6B during the rotation of the gear 8. One side of the second guide groove 8b, in the circumferential direction of the gear 8, is shaped such that it is at the same distance from the rotation axis X1. On the other hand, the other side of the second guide groove 8b, in the circumferential direction of the gear 8, is shaped such that the distance from the rotation axis X1 gradually increases towards the other end.

[0074] Furthermore, the corresponding racks 7 and gears 8 are in a meshing state, and when the sliding member 5 slides up and down, the gears 8 will rotate.

[0075] That is, the rotary operating mechanism 9 cooperates with the sliding component 5, such as... Figure 4 and Figure 5 As shown, the sliding action of the sliding member 5 to the downward side (one side) causes the gear 8 to rotate clockwise (Z1 direction).

[0076] When gear 8 rotates clockwise, pin 6d of the first disassembly member 6A is guided to one side of the guiding direction region of the first guide groove 8a, and the first disassembly member 6A slides downward as a single unit with the sliding member 5. On the other hand, pin 6d of the second disassembly member 6B is guided to the other side of the guiding direction region of the second guide groove 8b, and the second disassembly member 6B gradually separates from the sliding member 5 while sliding in the same direction as the sliding member 5. As a result, the first claw portion 6g and the second claw portion 6i in the second disassembly member 6B separate downward relative to the first claw portion 6g and the second claw portion 6i in the first disassembly member 6A.

[0077] On the other hand, such as Figure 6 and Figure 7 As shown, the rotary operating mechanism 9 and the sliding member 5 slide upward (on the other side) in conjunction with each other, causing the gear 8 to reverse (Z2 direction).

[0078] When gear 8 reverses, pin 6d of the second disassembly member 6B is guided to one side of the guiding direction region of the second guide groove 8b, and the second disassembly member 6B slides upward as an integral part of the sliding member 5. On the other hand, pin 6d of the first disassembly member 6A is guided to the other side of the guiding direction region of the first guide groove 8a, and the first disassembly member 6A gradually separates from the sliding member 5 while sliding in the same direction as the sliding member 5. As a result, the first claw portion 6g and the second claw portion 6i in the first disassembly member 6A separate upward relative to the first claw portion 6g and the second claw portion 6i in the second disassembly member 6B.

[0079] Next, the disassembly operation of electrode head E performed by electrode head disassembly device 1 will be described in detail.

[0080] First, such as Figure 4 As shown, the spot welding gun 20 is operated so that the electrode head E, mounted on the handle 22 on the upper side of the spot welding gun 20, moves toward the front of the electrode head removal device 1 with its central axis C1 pointing in the vertical direction. At this time, the gap G between the large diameter portion 22a and the electrode head E is aligned with the first claw portion 6g and the second claw portion 6i of the first removal member 6A and the second removal member 6B. Thus, the first claw portion 6g and the second claw portion 6i are inserted into the gap G.

[0081] At this time, the leaf spring 6k installed on the first disassembly member 6A is pressed by the side of the large diameter portion 22a and undergoes elastic deformation, and the leaf spring 6k installed on the second disassembly member 6B is pressed by the side of the electrode head E and undergoes elastic deformation.

[0082] Next, the spot welding gun 20 is moved downward. As a result, the first disassembly member 6A is pressed downward through the large diameter portion 22a, and at the same time, the sliding member 5 is pressed downward through each gear 8. Therefore, each gear 8, which moves downward together with the sliding member 5, begins to rotate forward through each rack 7.

[0083] When each gear 8 rotates clockwise, the pin 6d of the first disassembly component 6A is guided to the guiding direction side region of the first guide groove 8a. At this time, as... Figure 5 As shown, the guiding direction side region of the first guide groove 8a is shaped such that it is at the same distance from the rotation axis X1 in the circumferential direction of each gear 8. Therefore, the first disassembly member 6A slides integrally with the sliding member 5 without separating from it. On the other hand, when each gear 8 rotates clockwise, the pin 6d of the second disassembly member 6B is guided to the guiding direction side region of the second guide groove 8b. At this time, the guiding direction side region of the second guide groove 8b is shaped such that it gradually increases in distance from the rotation axis X1 towards the other end in the circumferential direction of each gear 8. Therefore, the second disassembly member 6B overcomes the force of the lower coil spring 10 and gradually separates from the sliding member 5 while sliding in the same direction as the sliding member 5. Thus, the first claw portion 6g and the second claw portion 6i of the first disassembly member 6A are hooked onto the large diameter portion 22a, while the first claw portion 6g and the second claw portion 6i of the second disassembly member 6B are hooked onto the electrode head E, and a force in the direction of separation is applied to the large diameter portion 22a and the electrode head E, thereby removing the electrode head E from the grip 22.

[0084] The electrode head E, which is removed from the grip 22, is propelled away from the second disassembly member 6B by the force of the leaf spring 6k of the second disassembly member 6B, and can be efficiently removed from the first disassembly member 6A and the second disassembly member 6B or the gun body 21.

[0085] After the electrode head E is removed from the handle 22, if the spot welding gun 20 is retracted from the electrode head removal device 1, the second removal member 6B is pressed upward by the force of the lower coil spring 10, and at the same time, the sliding member 5 and the first removal member 6A are also pressed upward by each gear 8, so that each gear 8 begins to reverse.

[0086] When each gear 8 reverses, the pin 6d of the first disassembly member 6A is guided to one side of the guiding direction of the first guide groove 8a, and the pin 6d of the second disassembly member 6B is guided to the other side of the guiding direction of the second guide groove 8b. Thus, the first disassembly member 6A and the sliding member 5 become one and slide upward. At the same time, the second disassembly member 6B also slides upward while approaching the sliding member 5. The first disassembly member 6A, the sliding member 5 and the second disassembly member 6B return to their original positions.

[0087] Next, as Figure 6 As shown, the spot welding gun 20 is operated so that the electrode head E, mounted on the handle 22 on the lower side of the spot welding gun 20, moves toward the front of the electrode head removal device 1 with its central axis C1 pointing in the vertical direction. At this time, the gap G between the large diameter portion 22a and the electrode head E is aligned with the first claw portion 6g and the second claw portion 6i of the first removal member 6A and the second removal member 6B. Thus, the first claw portion 6g and the second claw portion 6i are inserted into the gap G.

[0088] At this time, the leaf spring 6k installed on the first disassembly member 6A is pressed by the side of the electrode head E and undergoes elastic deformation, and the leaf spring 6k installed on the second disassembly member 6B is pressed by the side of the large diameter portion 22a and undergoes elastic deformation.

[0089] Next, the spot welding gun 20 is moved upward. Then, the second disassembly member 6B is pressed upward through the large diameter portion 22a. At the same time, the sliding member 5 is pressed upward through each gear 8. Therefore, each gear 8, which moves upward together with the sliding member 5, begins to reverse through each rack 7.

[0090] When each gear 8 reverses direction, the pin 6d of the second disassembly member 6B is guided to the guiding direction side region of the second guide groove 8b. At this time, the guiding direction side region of the second guide groove 8b is shaped such that it is at the same distance from the rotation axis X1 in the circumferential direction of each gear 8. Therefore, the second disassembly member 6B slides integrally with the sliding member 5 without separating from it. On the other hand, when each gear 8 reverses direction, the pin 6d of the first disassembly member 6A is guided to the guiding direction side region of the first guide groove 8a. At this time, the guiding direction side region of the first guide groove 8a is shaped such that it gradually increases in distance from the rotation axis X1 towards the other end in the circumferential direction of each gear 8. Therefore, the first disassembly member 6A overcomes the force of the upper helical spring 10 and gradually separates from the sliding member 5 while sliding in the same direction as the sliding member 5. Thus, the first claw portion 6g and the second claw portion 6i of the second disassembly member 6B are hooked onto the large diameter portion 22a, while the first claw portion 6g and the second claw portion 6i of the first disassembly member 6A are hooked onto the electrode head E, and a force in the direction of separation is applied to the large diameter portion 22a and the electrode head E, thereby removing the electrode head E from the grip 22.

[0091] The electrode head E, which is removed from the grip 22, is bounced away from the first disassembly member 6A by the force of the leaf spring 6k of the first disassembly member 6A, and can be efficiently removed from the first disassembly member 6A and the second disassembly member 6B or the gun body 21.

[0092] After the electrode head E is removed from the handle 22, if the spot welding gun 20 is retracted from the electrode head removal device 1, the first removal member 6A is pressed downward by the force of the upper helical spring 10, and at the same time, the sliding member 5 and the second removal member 6B are also pressed downward via each gear 8, so each gear 8 begins to rotate forward.

[0093] When each gear 8 rotates forward, the pin 6d of the second disassembly member 6B is guided to one side of the guiding direction of the second guide groove 8b, and the pin 6d of the first disassembly member 6A is guided to the other side of the guiding direction of the first guide groove 8a. Thus, the second disassembly member 6B and the sliding member 5 become one and slide downward. At the same time, the first disassembly member 6A also slides downward while approaching the sliding member 5. The first disassembly member 6A, the sliding member 5 and the second disassembly member 6B return to their original positions.

[0094] In summary, according to the embodiments of the present invention, during the disassembly of the electrode head E, each gear 8 rotates around the sliding member 5 located between the first disassembly member 6A and the second disassembly member 6B. Furthermore, the sliding member 5 slides integrally with either the first disassembly member 6A or the second disassembly member 6B. Therefore, even if the load generated on the first disassembly member 6A and the second disassembly member 6B by the reaction force from the gun body 21 or the electrode head E is concentrated around the rotation axis X1 of each gear 8, the rigidity around the sliding member 5 becomes high, making deformation difficult. Therefore, it is not necessary to enlarge the first disassembly member 6A and the second disassembly member 6B separately to increase rigidity, enabling a compact and lightweight electrode head disassembly device 1 that is difficult to malfunction even with repeated use.

[0095] Furthermore, when the first disassembly member 6A and the second disassembly member 6B are hooked and engaged with the gun body 21 and the electrode head E in the engaged state, if the gun body 21 is moved downwards (to one side) by sliding the sliding member 5 via the first disassembly member 6A, the gears 8 rotate clockwise, causing the first disassembly member 6A and the second disassembly member 6B to separate, thus removing the electrode head E from the gun body 21. Conversely, when the first disassembly member 6A and the second disassembly member 6B are hooked and engaged with the gun body 21 and the electrode head E in the engaged state, if the gun body 21 is moved upwards (to the other side) by sliding the sliding member 5 via the second disassembly member 6B, the gears 8 rotate counterclockwise, causing the first disassembly member 6A and the second disassembly member 6B to separate, thus removing the electrode head E from the gun body 21. Thus, a non-powered electrode head removal device 1 can be made that removes the electrode head E from the gun body 21 by moving the spot welding gun 20.

[0096] Furthermore, since the rack 7 extends in the vertical direction of the sliding member 5, the size of the electrode head removal device 1 can be designed to be shorter along a direction orthogonal to the long side of the rack 7. Therefore, the electrode head removal device 1 can be made compact along a direction orthogonal to the long side of the rack 7.

[0097] Furthermore, when the electrode head E is removed from the gun body 21, the first disassembly component 6A and the second disassembly component 6B approach each other and return to their original positions due to the force of the coil spring 10. Therefore, the disassembly operation of the next electrode head E can be smoothly transitioned to.

[0098] Furthermore, since the guide rod 4, which guides the sliding motion of the first disassembly member 6A and the second disassembly member 6B, is located inside the coil spring 10 that returns the first disassembly member 6A and the second disassembly member 6B to their original positions, the structure around the guide rod 4 can be made compact. Additionally, since the force of the coil spring 10 can be evenly transmitted to the area around the guide rod 4 of the first disassembly member 6A and the second disassembly member 6B, the first disassembly member 6A and the second disassembly member 6B can slide smoothly.

[0099] Furthermore, when the first claw portion 6g and the second claw portion 6i of each of the first disassembly member 6A and the second disassembly member 6B are inserted into the gap G between the large-diameter portion 22a and the electrode head E, and the first disassembly member 6A and the second disassembly member 6B are separated, the first claw portion 6g and the second claw portion 6i of one of the first disassembly members 6A and the second disassembly member 6B hooks and engages with the large-diameter portion 22a, while the first claw portion 6g and the second claw portion 6i of the other hooks and engages with the electrode head E, thereby removing the electrode head E from the gun body 21. In this way, during the disassembly operation of the electrode head E, the first disassembly member 6A and the second disassembly member 6B can be easily engaged with the gun body 21 and the electrode head E, enabling efficient disassembly of the electrode head E.

[0100] Furthermore, since the area around the opening of the guide hole 6c on the side corresponding to each helical spring 10 in the first disassembly member 6A and the second disassembly member 6B is stepped and recessed compared to other areas, the external shape of the parts of the first disassembly member 6A and the second disassembly member 6B that do not correspond to the helical spring 10 is increased while the arrangement space of the two helical springs 10 is brought closer together. Therefore, the electrode head disassembly device 1 can be made compact in the long side direction of the guide rod 4 while ensuring the rigidity of the first disassembly member 6A and the second disassembly member 6B.

[0101] Furthermore, when the electrode head E is removed from the gun body 21, the electrode head E is propelled away from the first disassembly member 6A and the second disassembly member 6B by the force of the leaf spring 6k. Therefore, the removed electrode head E can be efficiently removed from the first disassembly member 6A and the second disassembly member 6B or from the area around the gun body 21.

[0102] Furthermore, since the removal of the electrode head E is accomplished using the force of the leaf spring 6k, the space occupied in the direction of the applied force is smaller compared to, for example, a coil spring capable of applying the same force. Therefore, the structure surrounding the removal of the electrode head E in the first removal member 6A and the second removal member 6B can be made more compact.

[0103] In addition, in the embodiments of the present invention, a first guide groove 8a is provided on the gear 8, and a pin 6d that fits into the first guide groove 8a is provided on the first disassembly member 6A. However, it is also possible to provide a pin 6d on the gear 8 and a first guide groove 8a on the first disassembly member 6A.

[0104] In addition, in an embodiment of the present invention, a second guide groove 8b is provided on the gear 8, and a pin 6d that fits into the second guide groove 8b is provided on the second disassembly member 6B. However, it is also possible to provide a pin 6d on the gear 8 and a second guide groove 8b on the second disassembly member 6B.

[0105] In addition, in the embodiments of the present invention, the rotation operation mechanism 9 operates the rotation of the gear 8 in conjunction with the sliding action of the sliding member 5. However, for example, it may also be a structure in which one end of the operating rod is fixed to the gear 8 and the operator holds the other end of the operating rod to rotate it, thereby operating the rotation of the gear 8.

[0106] In addition, in the embodiments of the present invention, two helical springs 10 are wound and mounted on the guide rod 4 located on the back side of the main body housing 2 to apply force to the first disassembly member 6A and the second disassembly member 6B. However, the two helical springs 10 can also be wound and mounted on the guide rod 4 located on the front surface side of the main body housing 2 to apply force to the first disassembly member 6A and the second disassembly member 6B.

[0107] In addition, the electrode head disassembly device 1 of the present invention is provided with two claws on the first disassembly member 6A and the second disassembly member 6B respectively, but it may also be provided with three or more claws on each, or it may be a structure with one claw on each.

[0108] In addition, the electrode head removal device 1 of the present invention uses a helical spring 10 as the first force-applying member to apply force to the first removal member 6A and the second removal member 6B in a direction that brings them closer to each other. However, other types of force-applying members may also be used to apply force.

[0109] In addition, the electrode head removal device 1 of the present invention uses a leaf spring 6k as a second force-applying member to spring the removed electrode head E away, but other types of force-applying members can also be used to apply force.

[0110] Furthermore, the electrode head disassembly device 1 of the present invention engages the first disassembly member 6A and the second disassembly member 6B by hooking them onto the large diameter portion 22a and the electrode head E respectively, but is not limited thereto. For example, engagement can also be achieved by a structure that holds them separately.

[0111] Industrial applicability This invention relates to an electrode head removal device capable of removing the electrode head from the body of a spot welding gun.

[0112] Explanation of reference numerals in the attached figures 1. Electrode tip removal device 2. Main body shell 3 Disassembly Unit 4. Guide rod 5. Sliding components 5a Through hole 6A First Disassembly Component 6B Second Disassembly Component 6a Main Frame 6b stepped surface 6c guide hole 6d Pin (first protrusion) of the first disassembly component 6d Pin (second protrusion) of the second disassembly component 6e Hook and Hanging Part 6f Highlight the framework 6g First claw 6h first convex part 6i Second Claw 6j second convex part 6k leaf spring (second force-applying component) 7. Gear rack 8. Gear (rotating body) 8a First guide groove 8b Second guide slot 9 Rotary operating mechanism 10. Helical spring (first force-applying component) 20 spot welding guns 21 Gun body 22 Grip 22a Large diameter part 22b Small diameter section 60 fitting recess C1 Central Axis E electrode head G gap S1 storage space X1 is the axis of rotation.

Claims

1. An electrode head removal device for removing an electrode head from a spot welding gun body by means of a fitting mounting on the gun body, characterized in that, have: A sliding component capable of sliding in a specified direction; A rotary operating mechanism has a rotating body rotatably mounted on the sliding member about a rotation axis extending in a direction orthogonal to the sliding direction of the sliding member, and operates the rotation of the rotating body. The first and second disassembly components are positioned across the sliding member in the sliding direction of the sliding member, and are capable of sliding in the same direction as the sliding member, and can respectively engage with the gun body and the electrode head in their engaged state. One of the rotating body and the first disassembly member is provided with a first protrusion protruding in the same direction as the rotation axis, and the other is provided with a first guide groove that can guide the first protrusion during the rotation of the rotating body. One of the rotating body and the second disassembly member is provided with a second protrusion protruding in the same direction as the rotation axis, and the other is provided with a second guide groove that can guide the second protrusion during the rotation of the rotating body. The first and second guide grooves are symmetrical in shape with respect to the sliding member. The region on one side of the guide direction of the first and second guide grooves is set to be the same distance from the rotation axis in the circumferential direction of the rotating body. On the other hand, the region on the other side of the guide direction of the first and second guide grooves is set to be the shape that gradually increases in distance from the rotation axis as it moves towards the other end in the circumferential direction of the rotating body.

2. The electrode head disassembly device as described in claim 1, characterized in that, The rotating operating mechanism cooperates with the sliding member to cause the rotating body to rotate clockwise when the sliding member slides to one side, and to rotate counterclockwise when the sliding member slides to the other side.

3. The electrode head disassembly device as described in claim 2, characterized in that, The rotary operating mechanism includes a rack extending in the sliding direction of the sliding member. The rotating body is a gear that meshes with the rack.

4. The electrode head disassembly device as described in claim 1, characterized in that, It has a pair of first force-applying members that apply force to the first and second disassembly members toward one side that is close to each other.

5. The electrode head disassembly device as described in claim 4, characterized in that, It has a guide rod extending in the sliding direction of the sliding member. Guide holes are formed on the first and second disassembly components for the guide rod to be guided into place. The first force-applying component is a helical spring wound and installed on the guide rod.

6. The electrode head disassembly device as described in claim 5, characterized in that, The first and second disassembly components are provided with claws that can be inserted into the gap between the gun body and the electrode head.

7. The electrode head disassembly device as described in claim 5 or 6, characterized in that, In the first and second disassembly components, the area around the opening of the guide hole on the side corresponding to each of the helical springs is stepped recessed compared to other areas.

8. The electrode head disassembly device as described in claim 1, characterized in that, At one end of the first and second disassembly components, a second force-applying component is provided, which can apply a force to the electrode head in a direction intersecting its central axis during the disassembly operation of the electrode head.

9. The electrode head disassembly device as described in claim 8, characterized in that, The second force-applying component is a leaf spring.

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