JP6415917B2 - Stud bolt welding equipment - Google Patents

Description

  The present invention relates to a stud bolt welding apparatus.

As a floor slab used for a bridge, a steel floor slab is also known which is reinforced by arranging steel vertical ribs and horizontal ribs on the lower surface of a flat deck plate made of steel.
Such steel slabs are widely used because they are simpler to construct on site than reinforced concrete slabs because they do not require concrete placement or are lightweight.

By the way, the steel deck is fatigued and damaged by the load of the vehicle passing through the bridge and the earthquake, and the welded part between the deck plate and the vertical rib is cracked, and the crack propagates into the deck plate and weld bead. It is necessary to reinforce this.
Therefore, as in Patent Document 1, a steel reinforcing plate is brought into contact with the lower surface or upper surface of the deck plate of the steel floor slab, and through holes are formed in the deck plate and the reinforcing plate, and bolts passed through the through holes are used. A reinforcing method for fixing the reinforcing plate to the deck plate is performed.

However, with this type of reinforcement method, it is necessary to remove the pavement provided on the top surface of the deck plate and perform drilling work in order to form a through-hole through which the bolt passes through the existing deck plate. It takes time and effort.
Moreover, since it is necessary to regulate the traffic of the bridge within the range where the pavement is removed, it also hinders traffic. Furthermore, since the through hole is formed in the deck plate, the strength of the deck plate itself may be reduced.

For this reason, as shown in FIG. 9, the present inventors welded stud bolts 3 to the deck plate 2 and the vertical ribs 2a on the lower surface of the steel slab 1, and applied them to the lower surface of the deck plate 2 and the side surfaces of the vertical ribs 2b. An attempt was made to fix the reinforcing plate 4 with the nut 5 screwed into the stud bolt 3.
In this way, it is not necessary to form a through hole for inserting a bolt into the deck plate 2, so that it is not necessary to peel off the pavement 2a on the upper surface of the deck plate 2 when reinforcing the steel deck. This makes it possible to carry out reinforcement work while the vehicle is passing. Further, since the through hole is not formed, it is possible to prevent the strength of the deck plate 2 itself from being lowered.

JP 2008-50774 A

However, when the stud bolt welding operation is performed manually, the operation is performed while holding the welding gun with one hand while maintaining an upward posture. For this reason, high-precision welding is difficult and causes poor welding, and there is also a risk of falling stud bolts or flowing melt.
In particular, the steel slab has a gradient in the longitudinal direction (vehicle traveling direction) and in the transverse direction (width direction) depending on the installation status of the bridge. Therefore, work with the welding gun tilted slightly according to this gradient. That will be more difficult.

  Therefore, the problem to be solved by the present invention is to provide a welding apparatus suitable for welding a stud bolt to a lower surface of a steel deck of a bridge having a gradient in a longitudinal direction and a transverse direction.

  In order to solve the above-mentioned problems, the present inventors, as a stud bolt welding device for welding a stud bolt to the lower surface of a steel deck, have a welding gun capable of welding the stud bolt, and at least the welding gun facing upward. A gun holder for holding the gun holder, a jack for raising and lowering the gun holder, a first tilt mechanism for tilting the gun holder with respect to the transverse direction of the steel deck, and the gun holder tilting with respect to the longitudinal direction of the steel deck And a table on which the welding gun, the gun holder, the jack, and the first and second tilt mechanisms are mounted.

It is preferable that the stud bolt welding apparatus further includes an adjuster mounted on the table and horizontally moving the gun holder in a transverse direction and a longitudinal direction of the steel deck.
Moreover, it is preferable to provide further the rail laid under the said steel deck and to which the said table slides along the longitudinal direction of the said steel deck.

  The stud bolt welding apparatus has a fixed part where the gun holder is fixed to the jack, and a rotating part connected to the base part via a hinge mechanism and to which the welding gun is attached. The part is preferably rotatable with respect to the fixed part between a lying position for holding the welding gun upward and a standing position for holding the welding gun sideways.

The stud bolt welding device includes a lock mechanism that fixes the rotating portion of the gun holder to the lying position when the jack is raised, and releases the fixing of the rotating portion of the gun holder to the lying position when the jack is lowered. It is preferable to further provide.
The lock mechanism has a pair of opposing claw members, engages with the rotating portion approaching at the ascending position of the gun holder, the tip of which is in the lying position, and separated at the descending position of the gun holder. It is more preferable to release the engagement with the rotating portion at the lying position.
The pair of opposing claw members of the locking mechanism are supported so as to be pivotable in directions in which the tips approach and separate from each other, and the locking mechanism has a spring loaded between the opposing pair of claw members. The spring urges the claw member in a direction in which the tips approach each other, and guides the claw member in a direction in which the rear ends of the claw members are inserted and the tips are separated from each other at the lowered position of the jack. It is further preferable to have a guide mechanism in which the rear end of the claw member comes out at the raised position of the jack and is returned to a direction in which the tips approach each other by a spring.

The first tilt mechanism includes a support shaft extending in a longitudinal direction of the steel deck and a screw that rotatably supports the support shaft in parallel with the longitudinal direction of the steel deck and penetrates in the radial direction thereof. A bearing portion provided with a hole, an inclined base provided with the support shaft or the bearing portion and capable of inclining in the transverse direction of the steel floor slab, and screwed so as to advance and retreat into the screw hole of the bearing portion; And a set screw for fixing the tilt angle of the tilting table by the tip of the tilting table biting into the support shaft and releasing the fixing of the tilt angle of the tilting table by moving the tip away from the support shaft when retreating. Is preferred.
Similarly, the second tilt mechanism includes a support shaft extending in the transverse direction of the steel deck and a support shaft rotatably in parallel with the transverse direction of the steel deck, and in the radial direction thereof. A bearing portion provided with a threaded hole penetrating, an inclined base provided with the support shaft or the bearing portion and capable of inclining in the longitudinal direction of the steel floor slab, and screwed to be able to advance and retreat into the screw hole of the bearing portion; A set screw that, when moving forward, bites into the support shaft to fix the tilt angle of the tilting table, and when moving backward, the tip moves away from the support shaft and the tilting angle of the tilting table is released; It is preferable to have.

  The jack is preferably a pantograph jack. The adjuster is preferably an XY axis moving stage.

Since the stud bolt welding apparatus according to the invention is configured as described above, the work of welding the stud bolt to the deck plate or rib on the lower surface of the steel deck is mechanized, and the work burden and risk are reduced.
In particular, by having the first and second tilt mechanisms, the welding gun is appropriately tilted so as to face the deck plate and ribs depending on the state of inclination of the steel deck slab in the longitudinal direction and the transverse direction. Therefore, it is possible to suppress the occurrence of poor welding and the like.

Front view of raised position of stud bolt welding device Right side view of the stud bolt welding device in the raised position Left side view of the raised position of the stud bolt welding device Front view of the stud bolt welding device in the lowered position Right side view of the stud bolt welding device in the lowered position Left side view of the lowered position of the stud bolt welding device Front view showing the stud bolt welding device tilted in the longitudinal direction of the steel deck Right side view showing the stud bolt welding device tilted in the transverse direction of the steel deck Cross section of steel slab reinforced with stud bolt welding equipment

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6, the stud bolt welding apparatus of the embodiment shown in FIG. 1 uses a welding gun 10 as shown in FIG. 9 for the deck plate 2 and the vertical ribs 2b on the lower surface of the existing steel deck 1 and the studs on the horizontal ribs. The bolt 3 is welded.
The steel plate 1 is reinforced by fixing the reinforcing plate 4 in contact with the lower surface of the deck plate 2 and the side surface of the vertical rib 2b by the nut 5 screwed into the stud bolt 3. In FIG. 9, a U-rib is illustrated as the vertical rib 2b.

As shown in FIGS. 1 to 6, the stud bolt welding apparatus according to the embodiment includes a welding gun 10, a gun holder 20, a jack 30, an adjuster 40, first and second tilt mechanisms 50 and 60, and a table. 70 and a rail 80.
The welding gun 10 is held by a gun holder 20.
The gun holder 20 is moved up and down by the jack 30, is slid in the horizontal direction by the adjuster 40, is tilted in the transverse direction of the steel deck 1 by the first tilt mechanism 50, and is fixed to the steel deck 1 by the second tilt mechanism 60. Inclined in the length direction.
The gun holder 20, the jack 30, the adjuster 40, and the first and second tilt mechanisms 50 and 60 are all mounted on the table 70.
The rail 80 is laid along the longitudinal direction of the steel deck 1, and the table 70 can slide on the rail 80.

As shown in FIGS. 1 to 6, a general welding gun capable of welding the stud bolt 3 to an object to be welded by arc welding is used as the welding gun 10.
The welding gun 10 has a chuck 11 for holding the stud bolt 3 at its tip, and the chuck 11 is detachably attached to the adapter 12.
A cable 13 for supplying gas and current to the welding gun 10 is connected to the adapter 12, and an elongated leg 15 extending in the direction of the distal end of the welding gun is attached via a bracket 14.
A foot piece 16 is attached to the tip of the leg 15, and a ferrule 17 for blocking the welded portion of the stud bolt 3 from the outside air can be held here.
With the stud bolt 3 held on the chuck 11 and the ferrule 17 held on the footpiece 16, the cylindrical ferrule 17 is fitted on the stud bolt 3.
By loosening the adjustment screw 14 a attached to the bracket 14, the leg 15 can slide in the axial direction, and thereby the amount of protrusion of the stud bolt 3 from the tip of the ferrule 17 can be adjusted. .
The insulator attached to the adapter 12 electrically insulates the first half and the second half of the welding gun.
Further, the shock applied to the welding gun 10 is absorbed by the shock absorber attached to the bracket 14 when the ferrule 17 comes into contact with the deck plate 2 or the vertical rib 3 of the steel deck 1.

The rear portion of the adapter 12 is connected to the trunk portion 18. The body 18 has a grip 18a, and by operating a button attached to the grip 18a, supply and stop of supply of gas and current from the cable 13 can be switched.
In addition, a solenoid is built in the rear portion of the body portion 18, and when current is supplied to the welding gun 10, the solenoid is excited and the chuck 11 is pulled, whereby the stud bolt 3 held by the chuck 11. Recedes.
Therefore, a slight gap is created between the deck plate 2 and the vertical rib 2b of the steel deck 1 and the stud bolt 3 that is in contact with the deck plate 2, and an arc is generated here and arc welding is performed.
When the supply of current to the welding gun 10 is stopped, the solenoid is demagnetized, the chuck 11 is released from the pulling of the solenoid, and is returned to the initial position by the spring built in the welding gun 10.
As a result, the stud bolt 3 held by the chuck 11 moves forward and is pushed back to the molten pool formed on the lower surface of the deck plate 2.
The welding operation is completed by releasing the holding of the stud bolt 3 by the chuck 11 and removing the ferrule 17.

As shown in FIGS. 1 to 6, the gun holder 20 includes a fixed plate 21 fixed to the jack 30 and a rotating plate 22 that holds the welding gun 10, and the fixed plate 21 and the rotating plate 22 are hinges 23. It is combined with.
By the action of the hinge 23, the rotating plate 22 can be rotated between a standing position that is substantially perpendicular to the fixed plate 21 and a lying position that is substantially parallel to the stationary position.
The rotating plate 22 has a holding hole 22a, is divided into two parts across the holding hole 22a, and is reconnected by a fixing screw 22b.
When the barrel 18 of the welding gun 10 is passed through the holding hole 22a with the fixing screw 22b loosened, and then the fixing screw 22b is tightened, the barrel 18 is sandwiched between the two split pieces of the rotating plate 22. Is fixed.

In a state where the welding gun 10 is fixed to the rotating plate 22, the longitudinal direction of the welding gun 10 is substantially perpendicular to the plate surface of the rotating plate 22.
That is, the welding gun 10 faces upward at the lying position of the rotating plate 22 and the tip thereof faces the lower surface of the steel deck 1, and the welding gun 10 faces sideways at the standing position of the rotating plate 22. The tip is separated from the lower surface of the steel deck 1.
The welding operation is performed at the lying position of the rotating plate 22, and after the welding operation is completed, the rotating plate 22 is rotated to the standing position, and the mounting operation of the stud bolt to the chuck 11 of the welding gun 10 is performed. Become.
A wedge-shaped stopper 21 a is provided on the upper surface of the fixed plate 21, and when the rotating plate 22 stands, the bottom of the grip 18 a of the welding gun 10 held by the rotating plate 22 comes into contact with the welding gun 10. It is designed to be positioned.
Since the stopper 21a is wedge-shaped, the welding gun 10 is positioned in a sideways state and the tip is slightly upward, so that the operation of attaching the stud bolt 3 to the chuck 11 can be easily performed.

As shown in FIGS. 1 to 6, the jack 30 is a widely used pantograph jack, and connects the upper lift 31, the lower base 32, and the lift 31 and the base 32. Pantograph 33.
The elevator 31 is fixed by appropriate means in a state where it overlaps with the fixing plate 21 of the gun holder 20, and the base 32 is fixed by appropriate means while overlapping with the adjuster 40.
The pantograph 33 includes a plurality of arms 33a, and is configured to be extendable / contractible (linkable / extendable) by being linked with the arms 33a intersecting.

A pair of screw receiving portions 33b are provided in the middle portion of the pantograph 33 in the vertical direction, and reverse screw holes extending in the horizontal direction are formed in the screw receiving portions 33b. A screw shaft 34 is screwed between the pair of bearing portions.
A handle 34a is attached to the screw shaft 34. When the handle 34a is rotated in one direction, the screw receiving portions 33b are pulled together by the rotation of the screw shaft 34 as shown in FIGS. As a result, the elevator 31 is raised.
When the handle 34a is rotated in the reverse direction, as shown in FIGS. 4 to 6, the screw receiving portions 33b are separated from each other by the rotation of the screw shaft 34, and the pantograph 33 is contracted. .
During the welding operation, the elevator 31 is raised to bring the welding gun 10 closer to the deck plate 2 of the steel deck 1, and after the welding operation is completed, the elevator 31 is lowered to remove the welding gun 10 from the deck plate 2. Evacuate.
One of the pair of upper arms 33 a is guided by a horizontally extending guide hole 31 a provided in the lifting platform 31, and one of the pair of lower arms 33 a is provided in the horizontally extending guide hole provided in the base 32. By being guided by 32a, the change in the distance between the arms 33a accompanying the expansion and contraction of the pantograph 33 is absorbed.

As shown in FIGS. 1 to 6, a lock mechanism 90 is attached to the lifting / lowering base 31 of the jack 30.
The locking mechanism 90 has a pair of claws whose front ends are opposed to each other on the upper surface of the rotating plate 22 and whose rear ends are opposed to each other on the lower surface of the rotating plate 22 when the rotating plate 22 of the gun holder 20 is in the lying position. A member 91 is provided.
The pair of claw members 91 are supported by the lifting platform 31 at their intermediate portions in the longitudinal direction so that the front ends and rear ends of the pair of claw members 91 can be rotated in a direction approaching and separating.
A spring 92 is mounted between the rear ends of the pair of claw members 91, and this biases the ends of the claw members 91 to approach each other and the rear ends of the claw members 91 to separate from each other. ing.

As shown in FIGS. 1 to 6, the adjuster 40 is a general-purpose XY-axis moving stage, and includes an X-axis and Y-axis slider 41, a stage main body 42, an X-axis and Y-axis slider. A micrometer 43.
The slider 41 is superimposed on the upper surface of the stage main body 42 via a guide groove, and can slide along the guide groove extending in the X-axis direction and the Y-axis direction.
By rotating the attached X-axis and Y-axis micrometers 43, the slider 41 can be slightly slid in the horizontal direction, the X-axis direction, and the Y-axis direction.
Thereby, the fine adjustment of the position with respect to the longitudinal direction and transverse direction of the steel deck 1 of the welding gun 10 is possible.
The base 32 of the jack 30 is overlaid on the upper surface of the slider 41 and is fixed by appropriate means.

As shown in FIGS. 1 to 6, the first tilt mechanism 50 has a tilt base 51 in which the stage main body of the adjuster 40 is superimposed on the upper surface and fixed by appropriate means.
The inclined base 51 has a lever 51a fixed to the upper surface thereof, and a support shaft 51b extending in the longitudinal direction of the steel deck 1 on the lower surface thereof.
The support shaft 51b is rotatably supported by a bearing portion 52 provided in parallel with the longitudinal direction of the steel deck 1.
Therefore, by tilting the lever 51 a, the tilt table 51 can be tilted at an arbitrary angle with respect to the transverse direction of the steel deck 1.
Therefore, when the deck plate 2 of the steel floor slab 1 is inclined upward as shown in FIG. 8A, the deck plate 2 of the steel floor slab 1 ascends left as shown in FIG. 8B. It is possible to deal with any case where it is inclined.
In this way, the welding gun 10 is appropriately tilted in the transverse direction of the steel floor slab 1 according to the state of inclination relative to the transverse direction of the steel deck 1, and the tip of the welding gun 10 holding the stud bolt 3 is placed on the lower surface of the deck plate 2. It is possible to accurately face each other.

The bearing portion 52 has a screw hole penetrating in the radial direction, and a set screw 53 is screwed into the screw hole. When the set screw 53 is advanced, the tip of the set screw 53 bites into the support shaft 51b so that the tilt angle of the tilt base 51 can be fixed.
When the set screw 53 is retracted from this state, the tip of the set screw 53 moves away from the support shaft, the tilt angle of the tilt base 51 is released, and the tilt operation is performed by the lever 51a.
The first tilt mechanism 50 is attached with a protractor for measuring the tilt angle of the tilt table 51 (not shown).

As shown in FIGS. 1 to 6, on the upper surface of the tilt base 51 of the first tilt mechanism 50, a guide mechanism is provided which is composed of a pair of opposing guide plates 93 and cooperates with the lock mechanism 90.
Each guide plate 93 rises obliquely from the upper surface of the tilting table 51 and rises so that the distance between the guide plates 93 increases as the distance from the upper surface of the tilting table 51 increases. That is, in the side view, both guide plates 93 have an inverted C-shaped appearance.
As shown in FIGS. 4 to 6, when the lifting platform 31 of the jack 30 is lowered, the rear ends of the pair of claw members 91 of the lock mechanism 90 attached to the lifting platform 31 fit into the space between the guide plates 93. It comes to include.

Thus, the pair of claw members 91 are guided so that their rear ends approach each other, that is, rotate in a direction in which their front ends separate from each other, against the bias of the spring 92.
As shown in FIGS. 1 to 3, when the lifting platform 31 of the jack 30 is lifted, the rear ends of the pair of claw members 91 are released from the space between both guide 93 plates, and the pair of claw members are urged by the bias of the spring 92. It returns to the state where the tips of 91 are close to each other.

Therefore, when the lifting plate 31 of the jack 30 is raised when the rotating plate 22 of the gun holder 20 is in the lying position, the tips of the claw members 91 of the lock mechanism 90 approach each other as shown in FIGS. Thus, the rotary plate 22 is engaged, and the rotary plate 22 is locked in a lying state and cannot be rotated.
When the elevator 31 is lowered from here, as shown in FIGS. 4 to 6, the tips of the claw members 91 are separated from each other by the action of the guide mechanism to disengage from the rotating plate 22 and the lock is released. The rotating plate 22 can be rotated from the lying state to the standing state.

Therefore, when performing welding work by raising the welding gun 10, the welding gun 10 is locked in the upward state by the action of the lock mechanism 90, so that the welding work does not fall sideways even if an impact or the like is applied. Is done smoothly.
When the welding gun 10 is lowered after finishing the welding operation, the lock mechanism 90 is automatically released by the action of the guide mechanism as it descends, and the welding gun 10 can be tilted sideways. For this reason, the mounting | wearing etc. to the chuck | zipper 11 of the stud bolt used in a subsequent operation | work can be performed easily.

As shown in FIGS. 1 to 6, the second tilt mechanism 60 includes an inclined base 61 in which the bearing portion 52 of the first tilt mechanism 50 is fixed to the upper surface by appropriate means. A support shaft 61 a extending in the transverse direction of the steel deck 1 is provided on the lower surface of the inclined table 61.
The support shaft 61a is rotatably supported by a bearing portion 62 provided in parallel in the transverse direction of the steel deck 1.
Therefore, the tilting table 61 can be tilted at an arbitrary angle with respect to the longitudinal direction of the steel deck 1. Therefore, as shown in FIG. 7A, when the deck plate 2 of the steel floor slab 1 has an upward slope, as shown in FIG. 7B, the deck plate 2 of the steel floor slab 1 has a downward slope. Either can be supported.
Accordingly, the welding gun 10 is appropriately tilted in the longitudinal direction of the steel floor slab 1 in accordance with the state of inclination with respect to the longitudinal direction of the steel deck 1, and the tip of the welding gun 10 holding the stud bolt 3 is placed on the lower surface of the deck plate. It is possible to accurately face each other.

The bearing portion 62 has a screw hole penetrating in the radial direction, and a set screw 63 is screwed into the screw hole.
When the set screw 63 is advanced, the tip of the set screw 63 bites into the support shaft 61a so that the tilt angle of the tilt table 61 can be fixed.
When the set screw 63 is retracted from this state, the tip of the set screw 63 moves away from the support shaft 61a, and the tilt angle of the tilt base 61 is released and the tilt operation becomes possible.
A protractor for measuring the tilt angle of the tilt table 61 is attached to the second tilt mechanism 60 (not shown).

On the upper surface of the table 70, the bearing portion 62 of the second tilt mechanism 60 is fixed by appropriate means.
The table 70 is placed on a rail 80 laid along the longitudinal direction of the steel deck 1 on the lower surface of the deck plate 2, and can be slid along the rail 80.
A handle is attached to the upper surface of the table 70 so that the table 70 can be lifted (not shown).

The rail 80 is laid on a pedestal or scaffold installed below the steel deck.
Since the rail 80 is formed of a so-called striped plate and has irregularities formed on the surface thereof, the contact portion with the table 70 is only the convex portion 81 and the contact area is reduced.
As a result, the slide resistance of the table 70 is reduced, and smooth slide movement to the position where the welding operation is performed is possible.
Guides are attached to both sides of the rail 80 to prevent the table 70 from derailing from the rail 80 (not shown).

It should be considered that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications and variations within the scope and meaning equivalent to the terms of the claims.
In addition, the stud bolt welding apparatus of this invention can be diverted to the operation | work which welds a stud bolt with respect to what has the inclination of a longitudinal direction and a transverse direction on the lower surface in structures other than the steel deck 1. .

  The gun holder 20, the jack 30, the adjuster 40, the first and second tilt mechanisms 50 and 60, the table 70, the rail 80, and the lock mechanism 90 (including the guide mechanism) are not limited to the structure of the embodiment, and are publicly known. Mechanism is applicable.

For example, the gun holder 20 is not limited to the plate-like structure as in the embodiment, and may be a casing-like or frame-like structure that can hold the welding gun 10.
The jack 30 is not limited to the structure in which the pantograph is screw-fed as in the embodiment, and a known hydraulic jack, ball screw jack, linear actuator, or the like is applicable.
The first and second tilt mechanisms are not limited to the independent structures as in the embodiment, but are integrated types that can be tilted in both the longitudinal direction and the transverse direction of the steel deck 1 such as a flexible joint. It may be a thing.
The table 70 is not limited to the plate-like structure as in the embodiment, and may be a box-like structure. The table 70 may be divided into a plurality of small tables.
The rail 80 is not limited to the striped plate-like structure as in the embodiment, and may be a structure in which the rail 80 and the table 70 are fitted, for example, a structure such as a train track.
The locking mechanism 90 is not limited to the structure in which the claw member 91 rotates as in the embodiment. The claw member 91 slides in a horizontal direction by a predetermined operation, engages with the rotation plate 22 when approaching, and moves away. A structure in which engagement with the rotating plate 22 is added or removed may be used.
Further, the installation location of the claw member 91 is not limited to the embodiment, and the claw member 91 can be locked by being engaged with the rotary plate 22 when the rotary plate 22 of the holding unit 20 is lying down and when the elevator platform 31 of the lifting mechanism 30 is raised. I just need it.
The guide mechanism 90 is not limited to the structure including the pair of opposed guide plates 93 as in the embodiment, and may be any as long as the tips of the claw members 91 can be guided in directions toward or away from each other by a predetermined operation.

The adjuster 40, the rail 80, and the lock mechanism 90 can be omitted. When the rail 80 is omitted, the table 70 may be allowed to self-run by attaching a caster to the lower surface of the table 70.
The stacking order of the jack 30, the adjuster 40, the first and second tilt mechanisms 50, 60 is not limited to the embodiment.

DESCRIPTION OF SYMBOLS 1 Steel floor slab 2 Deck plate 2a Pavement 2b Vertical rib 3 Stud bolt 4 Reinforcement plate 5 Nut 10 Welding gun 11 Chuck 12 Adapter 13 Cable 14 Bracket 14a Adjustment screw 15 Leg 16 Foot piece 17 Ferrule 18 Body 18a Grip 20 Gun holder 21 Fixed Plate 21a Stopper 22 Rotating plate 22a Holding hole 22b Fixing screw 23 Hinge 30 Jack 31 Lifting base 31a Guide hole 32 Base 32a Guide hole 33 Pantograph 33a Arm 33b Screw receiving part 34 Screw shaft 34a Handle 40 Adjuster 41 Slider 42 Stage body 43 Micrometer 50 First tilt mechanism 51 Tilt base 51a Lever 51b Support shaft 52 Bearing portion 53 Set screw 60 Second tilt mechanism 61 Tilt base 61a Support shaft 62 Bearing portion 63 Set screw 70 Table 80 Rail 81 Convex 90 Lock mechanism 91 Claw member 92 Spring 93 Guide plate

Claims (11)

A stud bolt welding device for welding a stud bolt to the lower surface of a steel deck,
A welding gun capable of welding the stud bolt;
A gun holder for holding the welding gun at least upward;
A jack for raising and lowering the gun holder;
A first tilt mechanism for tilting the gun holder with respect to the transverse direction of the steel deck,
A second tilt mechanism that tilts the gun holder with respect to the longitudinal direction of the steel deck,
A table on which the welding gun, the gun holder, the jack, and the first and second tilt mechanisms are mounted;
A stud bolt welding apparatus comprising: Mounted on the table,
The stud bolt welding apparatus according to claim 1, further comprising an adjuster that horizontally moves the gun holder in a transverse direction and a longitudinal direction of the steel deck. The stud bolt welding apparatus according to claim 2 , wherein the adjuster is an XY axis moving stage. Arranged below the steel deck,
The stud bolt welding device according to any one of claims 1 to 3, further comprising a rail that slides the table along a longitudinal direction of the steel deck. The gun holder is
A fixing portion fixed to the jack;
A rotating part connected to the fixing part via a hinge mechanism and to which the welding gun is attached;
The rotating unit includes: a laid posture which upwardly hold the welding gun, claim 1 which is rotatable relative to the fixed portion between a standing position for holding the welding gun sideways 4 The stud bolt welding apparatus in any one of. 6. The lock mechanism according to claim 5 , further comprising: a locking mechanism that fixes the rotating portion to a lying position at a raised position of the gun holder by the jack and releases the fixing of the rotating portion to the lying position at the lowered position of the gun holder by the jack. Stud bolt welding equipment. The locking mechanism has a pair of opposing claw members,
The gun holder is approached at the ascending position and engages with the rotating part whose tip is at the lying position, and is separated at the descending position of the gun holder and engages with the rotating part at the lying position at the tip. The stud bolt welding device according to claim 6 which cancels. The pair of opposing claw members of the lock mechanism are supported so as to be rotatable in directions in which the tips approach and separate from each other.
The lock mechanism has a spring loaded between the pair of opposed claw members, and this spring biases the claw member in a direction in which the tips approach each other ,
The rear ends of the claw members are fitted in the lowered position of the gun holder and the front ends are guided away from each other, and the rear ends of the claw members come out at the raised position of the gun holder and the front ends approach each other by a spring. The stud bolt welding apparatus according to claim 7 , further comprising a guide mechanism for returning the direction. The first tilt mechanism includes:
A spindle extending in the longitudinal direction of the steel deck,
A bearing part provided in parallel with the longitudinal direction of the steel floor slab to rotatably support the spindle and provided with a screw hole penetrating in the radial direction thereof,
A tilt table provided with the support shaft or bearing portion and capable of tilting in the transverse direction of the steel deck,
It is screwed into the screw hole of the bearing portion so as to be able to advance and retreat, and its tip bites into the support shaft when moving forward to fix the tilt angle of the tilt table, and its tip moves away from the support shaft when moving backward and moves the tilt table. The stud bolt welding device according to any one of claims 1 to 8 , further comprising: a set screw for releasing the fixed inclination angle. The second tilt mechanism is
A spindle extending in the transverse direction of the steel deck,
A bearing part provided in parallel with the transverse direction of the steel deck slab to rotatably support the spindle and provided with a screw hole penetrating in the radial direction thereof,
A tilt table provided with the support shaft or bearing portion and tiltable in the longitudinal direction of the steel deck;
It is screwed into the screw hole of the bearing portion so as to be able to advance and retreat, and its tip bites into the support shaft when moving forward to fix the tilt angle of the tilt table, and its tip moves away from the support shaft when moving backward and moves the tilt table. The stud bolt welding device according to any one of claims 1 to 9 , further comprising a set screw for releasing the fixed inclination angle. The stud bolt welding device according to any one of claims 1 to 10 , wherein the jack is a pantograph type jack.

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