Stud welding unit

Abstract

To provide a stud welding unit which can be used as a handy type stud welding device in which a cable extends from a grip part and which can inhibit interference between the cable and an automatic machine and reduce moment acting on the automatic machine when used in the automatic machine.SOLUTION: A stud welding unit 1 includes: a body 100 including a solenoid coil, a drive shaft part, a chuck 130, and a biasing member; a cable 200; a switch unit 300; a hand case 400; and an automatic machine case 500. The hand case has a body housing part 410 and a grip part 420. The automatic machine case 500 has a body housing part 510 and a cable housing part 520. A length of the cable housing part 520 in an orthogonal direction orthogonal to a longitudinal direction of the body housing part 510 is shorter than a length of the grip part 420 in the orthogonal direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a stud welding unit.

Background Art

[0002] Japanese Unexamined Patent Application Publication No. 2007-209990 discloses a hand-held stud welding apparatus. This stud welding apparatus includes a main body housing that accommodates an electromagnetic coil and a drive main shaft, and a grip portion connected to the main body housing, wherein a cable disposed inside the grip portion extends from the lower end portion of the grip portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] Stud welding work may sometimes be performed by an automatic machine such as a robot. Accordingly, it is conceivable to perform welding work by the automatic machine in a state where the automatic machine holds a stud welding apparatus as described in Japanese Unexamined Patent Application Publication No. 2007-209990.

[0005] Since stud welding work is often performed in a posture of welding a stud downward, when the stud welding apparatus described above is attached to an automatic machine, there is a concern that the cable extending from the grip portion may interfere with the automatic machine. Further, when work is performed with the main body housing held by the automatic machine, a moment resulting from the weight of the grip portion and components disposed inside thereof acts on the automatic machine, and thus there is a concern that operability may be impaired.

[0006] The purpose of this disclosure is to provide a stud welding unit that can be used as a hand-type stud welding device with a cable extending from the grip portion, and that can achieve both suppression of interference between the cable and the automated machine when used with an automated machine, and reduction of the moment acting on the automated machine. [Means for solving the problem]

[0007] A stud welding unit according to one aspect of the present disclosure comprises a main body including a solenoid coil, a drive shaft portion that is attracted toward the solenoid coil when the solenoid coil is energized, a chuck connected to the drive shaft portion and capable of holding a stud, and a biasing member that biases the drive shaft portion away from the solenoid coil; a cable connected to the main body portion; a switch unit that is detachably connected to the cable and capable of switching the energization of the solenoid coil on and off; a hand case housing at least the solenoid coil, a portion of the cable, and the switch unit from the main body portion; and an automatic machine case housing at least the solenoid coil and a portion of the cable from the main body portion, wherein the main body portion has a shape that extends long in the axial direction of the drive shaft portion. The hand case has a main body housing portion that houses at least the solenoid coil, and a grip portion that extends from the main body housing portion in a direction intersecting the longitudinal direction of the main body housing portion and can be grasped by an operator, the grip portion housing a portion of the cable so that the cable extends in a direction intersecting the longitudinal direction of the main body housing portion and can also house the switch unit, the automatic machine case has a main body housing portion that houses at least the solenoid coil, and a cable housing portion that houses a portion of the cable so that the cable extends in a direction parallel to the longitudinal direction of the main body housing portion, the length of the cable housing portion in an orthogonal direction perpendicular to the longitudinal direction of the main body housing portion is shorter than the length of the grip portion in the orthogonal direction. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide a stud welding unit that can be used as a hand-type stud welding device with a cable extending from the grip portion, and that can achieve both suppression of interference between the cable and the automated machine when used with an automated machine, and reduction of the moment acting on the automated machine. [Brief explanation of the drawing]

[0009] [Figure 1] This is an exploded perspective view schematically showing a stud welding unit in one embodiment of the present disclosure. [Figure 2] This is a front view of a handheld stud welding machine. [Figure 3] This is a front view of an automated stud welding machine. [Figure 4] This is a schematic perspective view showing an automated stud welding machine in a state where it is held by the automated machine. [Figure 5] This is a perspective view of an automated stud welding machine at a different angle than Figure 4. [Figure 6] This is a cross-sectional view of an automated stud welding machine. [Modes for carrying out the invention]

[0010] Embodiments of this disclosure will be described with reference to the drawings. In the drawings referred to below, the same or equivalent components are given the same number.

[0011] Figure 1 is a schematic exploded perspective view showing a stud welding unit in one embodiment of the present disclosure. The stud welding unit 1 can be switched between a hand-held type stud welding device 2 (shown in Figure 2) used by an operator, and an automated type stud welding device 3 (shown in Figure 3) used while being held by an automated machine (robot).

[0012] As shown in Figures 1 to 3, the stud welding unit 1 includes a main body portion 100, a cable 200, a switch unit 300, a manual case 400, and an automatic machine case 500.

[0013] The main body portion 100 includes a solenoid coil 110 (see Figures 2 and 3), a drive shaft portion 120 (see Figures 2 and 3), a chuck 130, a chuck adapter 140, a biasing member 150 (see Figures 2 and 3), a shock absorber 160, an insulating sleeve 170, and a housing 180.

[0014] The solenoid coil 110, the drive shaft portion 120 and the biasing member 150 are arranged inside the housing 180. When the solenoid coil 110 is energized, the drive shaft portion 120 is attracted toward the solenoid coil 110. The biasing member 150 biases the drive shaft portion 120 in the direction away from the solenoid coil 110 (leftward in Figure 2).

[0015] The chuck 130 is connected to the drive shaft portion 120 and is capable of holding a stud S (see Figure 5). The chuck 130 is connected to the drive shaft portion 120 via the chuck adapter 140.

[0016] The shock absorber 160 is held by the main body portion 100 in a posture parallel to the axial direction of the drive shaft portion 120. The shock absorber 160 includes a cylinder containing oil, and a rod arranged inside the cylinder.

[0017] The insulating sleeve 170 surrounds the portion of the drive shaft portion 120 that protrudes from the main body portion 100. The insulating sleeve 170 is made of rubber, for example, and is formed in a bellows shape.

[0018] The cable 200 is connected to the main body portion 100. The cable 200 includes a coil line 210, a power supply line 220, and a connector 230.

[0019] The coil line 210 is electrically connected to the solenoid coil 110. The coil line 210 is a wiring for supplying power to the solenoid coil 110.

[0020] The power supply line 220 is electrically connected to the chuck 130. The power supply line 220 is a line for supplying power to the chuck 130 and the stud S held by the chuck 130.

[0021] The switch unit 300 is detachably connectable to the cable 200, and is capable of switching between energization to the solenoid coil 110 and stopping the energization. The switch unit 300 is connected to the connector 230 of the cable 200 when the stud welding unit 1 is used as a hand-held type stud welding apparatus 2, and is detached from the connector 230 when the stud welding unit 1 is used as an automatic machine type stud welding apparatus 3.

[0022] The switch unit 300 includes a switch main body 310 and an operation part 320. The switch main body 310 is configured to be connectable to the connector 230. The operation part 320 is capable of switching the switch main body 310 on and off. The operation part 320 is a portion to be operated by an operator.

[0023] The hand case 400 is used when the stud welding unit 1 is used as the hand-held type stud welding apparatus 2. The hand-held type stud welding apparatus 2 includes a main body part 100, a cable 200, a switch unit 300, and a hand case 400. The hand case 400 accommodates the housing 180 of the main body part 100, a part of the cable 200, and the switch unit 300. The hand case 400 has a main body accommodating part 410 and a grip part 420.

[0024] The main body housing section 410 houses at least the solenoid coil 110 of the main body section 100. In this embodiment, the main body housing section 410 houses the housing 180. The main body housing section 410 is generally cylindrical in shape. The main body housing section 410 has a shape that extends long in one direction. A rear cap RC is attached to the rear end of the main body housing section 410 (the end opposite to the side where the chuck 130 is located).

[0025] The main body housing section 410 has side walls 412. The side walls 412 are formed on both sides of the main body housing section 410 in the width direction (the direction perpendicular to the plane of the paper in Figure 2). The width direction is perpendicular to both the longitudinal direction of the main body housing section 410 (the left-right direction in Figure 2) and the direction in which the main body housing section 410 and the grip section 420 are aligned (the up-down direction in Figure 2). Through holes 412h are provided in the side walls 412. The main body section 100 is fixed to the main body housing section 410 by fastening pins P inserted through these through holes 412h.

[0026] The grip portion 420 has a shape that extends from the main body housing portion 410 in a direction intersecting the longitudinal direction of the main body housing portion 410. The grip portion 420 is a part that can be grasped by an operator. As shown in Figure 2, the grip portion 420 can house a portion of the cable 200 so that the cable 200 extends in a direction intersecting the longitudinal direction of the main body housing portion 410, and can also house the switch unit 300. The grip portion 420 houses the switch unit 300 with the operating portion 320 of the switch unit 300 exposed to the outside. A cable insertion hole 420h for inserting the cable 200 is provided at the lower end of the grip portion 420 (the end opposite to the side where the main body housing portion 410 is located).

[0027] As shown in Figure 1, the lower part of the side wall 412 of the hand case 400 is provided with a leg insertion section 430 through which the leg 12 (see Figures 4 to 6) is inserted.

[0028] The automatic machine case 500 is used when the stud welding unit 1 is used as an automatic type stud welding apparatus 3. The automatic type stud welding apparatus 3 comprises a main body 100, a cable 200, and the automatic machine case 500. The automatic machine case 500 houses at least the solenoid coil 110 of the main body 100 and a portion of the cable 200. The automatic machine case 500 has a main body housing section 510 and a cable housing section 520.

[0029] The main body housing section 510 houses at least the solenoid coil 110 of the main body section 100. In this embodiment, the main body housing section 510 houses the housing 180. The main body housing section 510 is formed in a generally cylindrical shape. The main body housing section 510 has a shape that extends long in one direction. A rear cap RC is attached to the rear end of the main body housing section 510.

[0030] The main body housing section 510 has side walls 512. The side walls 512 are formed on both sides of the main body housing section 510 in the width direction (the direction perpendicular to the plane of the paper in Figure 3). Through holes 512h are provided in the side walls 512. The main body section 100 is fixed to the main body housing section 510 by fastening pins P inserted through these through holes 512h.

[0031] Figure 4 is a schematic perspective view showing an automated stud welding machine being held by an automated machine. Figure 5 is a perspective view of the automated stud welding machine from a different angle than Figure 4. Figure 6 is a cross-sectional view of the automated stud welding machine. As shown in Figures 4 to 6, the automated machine 50 has a holding part 52 capable of holding the automated stud welding machine 3, and the side walls 512 of the automated stud welding machine 3 are held by the holding part 52. The holding part 52 has a shape that clamps the side walls 512 from both sides in the width direction. Note that in Figure 6, the structure inside the housing 180 of the main body 100 is omitted.

[0032] The side wall 512 of the automatic machine case 500 has higher rigidity than the side wall 412 of the hand case 400. In this embodiment, as shown in Figure 1, the thickness t3 of the side wall 512 is greater than the thickness t2 of the side wall 412.

[0033] The cable housing section 520 accommodates a portion of the cable 200 such that the cable 200 extends in a direction parallel to the longitudinal direction of the main body housing section 510. The cable housing section 520 has a shape that extends long in a direction parallel to the longitudinal direction of the cable housing section 520. The cable housing section 520 is provided with a cable insertion hole 520h through which the cable 200 is inserted. It is preferable that reinforcing ribs (not shown) are provided on the inner surface of the cable housing section 520.

[0034] As shown in Figures 2 and 3, the length L3 of the cable housing 520 in the orthogonal direction perpendicular to the longitudinal direction of the main body housing 510 is shorter than the length L2 of the grip portion 420 in the orthogonal direction. Also, the distance L5 between the center of the through hole 512h provided in the side wall 512 and the lower end of the cable housing 520 is shorter than the distance L4 between the center of the through hole 412h provided in the side wall 412 and the lower end of the grip portion 420.

[0035] As shown in Figures 1, 5, and 6, a leg insertion portion 530 for inserting the leg 12 is provided at the lower part of the side wall 512 of the automatic machine case 500. The thickness of the outer portion 532 of the leg insertion portion 530 in the width direction is greater than the thickness of the inner portion 531 of the leg 12 in the width direction.

[0036] Here, the power supply line 220 will be described in detail. As shown in Figures 1 to 3, the power supply line 220 has an inner wiring section 222 and an outer wiring section 224. The inner wiring section 222 is located inside the grip section 420 or the cable housing section 520. The outer wiring section 224 is connected to the inner wiring section 222 and is located outside the grip section 420 or the cable housing section 520. The inner wiring section 222 has a lower bending rigidity than the outer wiring section 224. In this embodiment, the inner wiring section 222 is made of soft copper stranded wire. That is, the inner wiring section 222 is more flexible than the outer wiring section 224.

[0037] As described above, in the stud welding unit 1 of this embodiment, when a hand-type stud welding device 2 is configured, the main body 100, cable 200, and switch unit 300 are housed in the hand-type case 400. When changing from the hand-type stud welding device 2 to an automatic machine type stud welding device 3, the switch unit 300 is removed from the connector 230, and the main body 100 and cable 200 are housed in the automatic machine case 500. Therefore, it is possible to easily switch between the hand-type and automatic machine type.

[0038] Furthermore, since the length L3 of the cable housing portion 520 in the orthogonal direction is shorter than the length of the grip portion 420 in the orthogonal direction, the moment acting on the holding portion 52 of the automatic machine 50 is reduced when the automatic machine 50 is working while holding the automatic machine type stud welding device 3, compared to when the automatic machine 50 is working while holding the hand-type stud welding device 2.

[0039] Furthermore, for example, when switching from a handheld type to an automated machine type, the inner wiring section 222 is bent so that the direction in which the outer wiring section 224 extends is parallel to the longitudinal direction of the main body housing section 510. However, since the inner wiring section 222 has a lower bending rigidity than the outer wiring section 224, it is easy to route the cable 200 into the cable housing section 520.

[0040] Those skilled in the art will understand that the above-described exemplary embodiments are specific examples of the following embodiments.

[0041] [Aspect 1] A main body comprising a solenoid coil, a drive shaft portion that is attracted toward the solenoid coil when current is supplied to the solenoid coil, a chuck connected to the drive shaft portion and capable of holding a stud, and a biasing member that biases the drive shaft portion in a direction away from the solenoid coil, The cable connected to the main body, A switch unit that can be detachably connected to the aforementioned cable and that can switch between supplying and stopping power to the solenoid coil, A hand-held case that houses at least the solenoid coil, a portion of the cable, and the switch unit of the main body, The main body comprises at least the solenoid coil and a part of the cable, and an automatic machine case that houses them. The main body portion has a shape that extends long in the axial direction of the drive shaft portion, The aforementioned hand case is Of the main body portion, at least the main body portion housing portion that houses the solenoid coil, It has a grip portion that extends from the main body housing in a direction intersecting the longitudinal direction of the main body housing and can be grasped by an operator, The grip portion is capable of housing a portion of the cable such that the cable extends in a direction intersecting the longitudinal direction of the main body housing portion, and also capable of housing the switch unit. The aforementioned case for the automatic machine is Of the main body portion, at least the main body portion housing portion that houses the solenoid coil, The main body housing portion includes a cable housing portion that houses a portion of the cable such that the cable extends in a direction parallel to the longitudinal direction of the housing portion of the main body, A stud welding unit in which the length of the cable housing in a direction perpendicular to the longitudinal direction of the main body housing is shorter than the length of the grip in the same perpendicular direction.

[0042] In this stud welding unit, a hand-type stud welding device is configured such that an operator can work while gripping the handle by housing at least the solenoid coil, part of the cable, and the switch unit of the main body in a hand-type case, and an automated machine-type stud welding device is configured such that an operator can work while holding the handle by housing at least the solenoid coil and part of the cable of the main body in an automated machine-type case, allowing for easy switching between hand-type and automated machine-type configurations. Furthermore, because the length of the cable housing in the orthogonal direction is shorter than the length of the grip in the orthogonal direction, the moment acting on the automated machine is reduced when the automated machine is holding the automated machine-type stud welding device compared to when the automated machine is holding the hand-type stud welding device.

[0043] [Aspect 2] The aforementioned cable is A coil line electrically connected to the solenoid coil, The chuck has a power supply line electrically connected to it, The aforementioned power supply line is An internal wiring section disposed within the grip portion or the cable housing portion, It has an outer wiring section which is connected to the inner wiring section and is located outside the grip section or the cable housing section, The stud welding unit according to embodiment 1, wherein the inner wiring portion has a bending rigidity lower than that of the outer wiring portion.

[0044] In this embodiment, it becomes easier to change the orientation of the power supply line when switching between arranging the power supply line inside the grip section and arranging the power supply line inside the cable housing section.

[0045] [Aspect 3] The main body housing in the hand case includes side walls formed on both sides in the width direction perpendicular to both the longitudinal direction of the main body housing and the direction in which the main body housing and the grip portion are aligned, The main body housing in the aforementioned automatic machine case includes side walls formed on both sides in the width direction perpendicular to both the longitudinal direction of the main body housing and the direction in which the main body housing and the cable housing are aligned, The stud welding unit according to embodiment 1 or 2, wherein the side wall of the case for the automatic machine has higher rigidity than the side wall of the case for the hand.

[0046] In this embodiment, the side walls of the case for the automated machine are held by the automated machine, thereby suppressing damage to the case for the automated machine during operation by the automated machine.

[0047] It should be noted that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than by the description of the embodiments above, and further includes all modifications within the meaning and scope equivalent to the claims. [Explanation of symbols]

[0048] 1 Stud welding unit, 2 Handheld stud welding device, 3 Automatic stud welding device, 100 Main body, 110 Solenoid coil, 120 Drive shaft, 130 Chuck, 140 Chuck adapter, 150 Biasing member, 160 Shock absorber, 170 Insulating sleeve, 180 Housing, 200 Cable, 210 Coil line, 220 Power supply line, 222 Internal wiring section, 224 External wiring section, 230 Connector, 300 Switch unit, 310 Switch body, 320 Operating section, 400 Case for handheld, 410 Main body housing section, 412 Side wall, 420 Grip section, 500 Case for automatic machine, 510 Main body housing section, 512 Side wall, 520 Cable housing section, 530 Leg insertion section, RC Rear cap, S Stud.

Claims

1. A main body comprising a solenoid coil, a drive shaft portion that is attracted toward the solenoid coil when current is supplied to the solenoid coil, a chuck connected to the drive shaft portion and capable of holding a stud, and a biasing member that biases the drive shaft portion in a direction away from the solenoid coil, The cable connected to the main body, A switch unit that can be detachably connected to the aforementioned cable and that can switch between supplying and stopping power to the solenoid coil, A hand-held case that houses at least the solenoid coil, a portion of the cable, and the switch unit of the main body, The main body comprises at least the solenoid coil and a part of the cable, and an automatic machine case that houses them. The main body portion has a shape that extends long in the axial direction of the drive shaft portion, The aforementioned hand case is Of the main body portion, at least the main body portion housing portion that houses the solenoid coil, It has a grip portion that extends from the main body housing in a direction intersecting the longitudinal direction of the main body housing and can be grasped by an operator, The grip portion is capable of housing a portion of the cable such that the cable extends in a direction intersecting the longitudinal direction of the main body housing portion, and also capable of housing the switch unit. The aforementioned case for the automatic machine is Of the main body portion, at least the main body portion housing portion that houses the solenoid coil, The main body housing portion includes a cable housing portion that houses a portion of the cable such that the cable extends in a direction parallel to the longitudinal direction of the housing portion of the main body, A stud welding unit in which the length of the cable housing in a direction perpendicular to the longitudinal direction of the main body housing is shorter than the length of the grip in the same perpendicular direction.

2. The aforementioned cable is A coil line electrically connected to the solenoid coil, The chuck has a power supply line electrically connected to it, The aforementioned power supply line is An internal wiring section disposed within the grip portion or the cable housing portion, It has an outer wiring section which is connected to the inner wiring section and is located outside the grip section or the cable housing section, The stud welding unit according to claim 1, wherein the inner wiring portion has a bending rigidity lower than that of the outer wiring portion.

3. The main body housing in the hand case includes side walls formed on both sides in the width direction perpendicular to both the longitudinal direction of the main body housing and the direction in which the main body housing and the grip portion are aligned, The main body housing in the aforementioned automatic machine case includes side walls formed on both sides in the width direction perpendicular to both the longitudinal direction of the main body housing and the direction in which the main body housing and the cable housing are aligned, The stud welding unit according to claim 1 or 2, wherein the side wall of the case for the automatic machine has higher rigidity than the side wall of the case for the hand.

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