JP2622474B2 - Locking device for rotating body opening / closing part in work reversing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work reversing device used for welding a long work such as a steel prism having a connection, and more particularly to a locking device for an opening / closing portion which opens and closes when a work is carried in and out.

[0002]

2. Description of the Related Art Conventionally, a reversing device used for permanently welding a work, for example, a steel prism having a connection, rotates a rotating ring body 61 holding both sides of a prism P, as shown in FIG. The rotary ring body 61 is rotatably supported on a plurality of pedestals 62 each having an apparatus. The rotary ring body 61 has an opening for loading / unloading the prism P at an upper portion of a ring main body 61a. An opening / closing member 61b is provided on the portion so as to be freely opened and closed. In addition, the rotating ring body 61 has a corner clamp device 64 that presses and holds the corner clamp bodies 63A and 63B against the two corner portions on both lower sides of the prism P, respectively, in the ring main body 61a.
And a surface clamp device 66 that presses and holds the upper surface clamp body 65 against the upper surface of the prism P.

[0003]

The opening / closing member 61b
One end is rotatably supported via a support shaft 67 and a pin hole is formed on the other end side. The pin hole is formed with a centered pin hole formed on the ring body 61a side. The lock pin 69 was attached and locked.

For this reason, every time the prism P is carried in and out, the work of attaching and detaching the lock pin must be performed, and the work efficiency is poor, and the work is troublesome and requires labor. By the way, since the rotating ring body 61 is rotatably supported by the gantry 62, its thickness is also limited (it also interferes with the connection member). Further, since the surface clamping device 66 is provided, it also receives a clamping reaction force. A reliable lock is required in terms of strength, and a secure lock is required.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a locking device for a rotating body opening / closing portion of a work reversing device which can automatically fix and release an opening / closing member, and has a large strength. I do.

[0006]

In order to solve the above-mentioned problems, a lock device for a rotating body opening / closing portion in a work reversing device according to the present invention comprises a rotating ring body rotatably supported on a frame around a horizontal axis. A plurality of work holding devices provided on the rotating ring body for holding the work, a ring body having an opening through which the rotating ring body can be inserted and withdrawn, and an opening / closing member capable of opening and closing the opening. In the work reversing device, one end of the opening / closing member is rotatably attached to one end of the opening of the ring main body via a horizontal pin parallel to the axial direction of the rotating ring body, and the ring main body is attached to the other end. A pair of locking plates externally fitted to both outer surfaces along the rotation surface at the other end of the opening and having locking holes formed at opposing positions are provided. Rotating ring body axis direction A pair of lock pins that can be extended and retracted to be inserted into and removed from the locking holes, a screw mechanism that rotates the lock pins through respective connected drive shafts, and a screw mechanism that moves the lock shaft out and back; And a lock rotation drive device that rotates in the reverse direction.

[0007]

According to the above construction, the lock pin is rotated via the drive shaft by the lock rotation drive device, and the lock pin is projected via the screw mechanism, so that the lock pin is externally fitted to both side surfaces on the other end side of the opening. The opening / closing member can be firmly locked by fitting into the locking hole of the locking plate. Alternatively, by retracting the lock pin via the screw mechanism, the lock pin can be pulled out from the lock hole of the lock plate and the lock can be easily released. Therefore, the opening / closing member can be automatically fixed / released, and the two locking pins protrude symmetrically to fix the locking plates on both sides, so that a large fixing force can be obtained and Since the lock pins are rotated by the screw mechanism, drive shaft and gear mechanism, a lock rotation drive device can be arranged between the two lock pins, making the whole compact and limiting the installation space. It can be easily installed even if there is a rotating ring body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a work reversing device provided with a lock device according to the present invention will be described below with reference to the drawings.

[0009] This welding equipment is for performing a main welding while rotating a steel prism P having joints S at a plurality of locations, and as shown in FIGS. 7 and 8, two work reversing devices 1A. , 1B and one automatic welding device 2 having a work arm 2a. Two work reversing devices 1A, 1B are arranged side by side on a pair of left and right guide rails 3, and the automatic welding device 2 is provided.
Is disposed on a traveling rail 4 laid along the guide rail 3 via a self-propelled carriage 5, and can perform welding work corresponding to the steel prisms P held by the work reversing devices 1A and 1B, respectively. It is configured so as to be freely movable.

Since the work reversing devices 1A and 1B have the same structure, only one will be described and the other will not be described. As shown in FIGS. 2 to 4, the work reversing device 1A includes a pair of front and rear movable frames 7A and 7B movable along the guide rail 3, and the movable frames 7A and 7B are rotatable around the axis. The rotating ring bodies 8 supported by the respective members are arranged. The rotating ring body 8 includes a ring main body 9A having an opening 8a through which the steel prism P can be inserted and withdrawn so as to insert and remove the steel prism P, and an opening and closing member 9B that can open and close the opening 8a. This rotating ring body 8
Are provided with a plurality of holding devices for holding the steel prism P.

The details will be described below. The moving frame 7A,
At the four bottom corners of 7B, front and rear frame plates 1 are provided with traveling wheels 11 guided by the guide rails 3 and movable, and formed with arc-shaped receiving recesses 12 in the front and rear direction.
3A and 13B are erected in parallel with a certain interval, and the rotating ring body 8 is provided at a total of four places, two lower places and two upper places at the outer periphery of the housing recess 12 between the front and rear frame plates 13A and 13B. A guide roller 14 for guiding the outer peripheral portion is arranged, and the rotating ring body 8 is rotatably supported between the front and rear frame plates 13A, 13B.
Reference numeral 4 denotes a drive roller 14a.

The rotating ring body 8 composed of the ring main body 9A and the opening / closing member 9B has a ring gear 15 disposed on the front edge side of the outer peripheral portion of the rotating ring body 8, and the remaining outer peripheral portion is supported by the guide roller 14. It is formed on the rotation guide surface 16. As shown in FIG.
The drive gear 17 meshing with the ring gear 15
The drive gear 17 is mounted on the front frame plate 1.
An output shaft of a rotary drive motor 18 provided in 3A is interlocked with gears via gears 19A and 19B so as to be driven to rotate.

The rotating ring body 8 has a housing space 20 for a steel prism P at the center thereof, and the upper opening / closing member 9B has an end portion between the front and rear frame plates 13A, 13B via a horizontal pin 21 in the axial direction. The other end is detachably fixed by a lock device 22 provided on the ring body 9A side.

As shown in FIG. 1, the lock device 22 includes a front and rear plate 5 of a ring body 9A having a limited front and rear thickness.
1A, 51B.
Holes 51a, 51a formed at positions opposing to 51B,
Boss 52 formed with left and right reverse screw holes 52a, 52a
A and 52B are respectively attached. Lock pins 53A, 5 each having external threaded portions 53a, 53a screwed into the reverse screw holes 52a, 52a formed on the outer peripheral portion on the base end side.
3B are mounted in the bosses 52A and 52B, respectively, and the through holes 53b and 53b of the lock pins 53A and 53B are provided.
One spline shaft 54 is mounted in the spline holes 53c, 53c provided in the. This spline shaft 5
A worm wheel 55 is fixed to the center of the motor 4 and an output shaft 56a of a lock electric motor (lock rotation driving device) 56 disposed between the front and rear plates 51A and 51B.
A worm 57 attached to the worm wheel 55 is configured to mesh with the worm wheel 55. On the other hand, the opening and closing member 9B
Are provided at the other end portions thereof with locking plates 61A, 61B which can be fitted to the outer surfaces of the front and rear plates 51A, 51B, respectively.
Locking holes 62A and 62B are formed at positions corresponding to the lock pins 53A and 53B, respectively, at opposing positions.

Accordingly, the lock electric motor 56 is driven to rotate the spline shaft 54 via the worm 57 and the worm wheel 55, and the lock pins 53A,
By rotating the screw 53B, the lock pins 53A, 53B are retracted by the action of the male screw portion 53a and the reverse screw hole 52a, and the lock pins 53A, 53B are moved to the locking plate plate 61.
A and 61B can be fitted into and removed from the locking holes 62A and 62B, respectively.

An opening / closing device 23 for the opening / closing member 9B is arranged on the movable gantry 7A, 7B on the rotation center side of the opening / closing member 9B. The opening / closing device 23 has a movable base 7A at the base end,
Opening / closing cylinder device 24 rotatably supported by 7B
And the piston rod 24 of the opening / closing cylinder device 24
The opening / closing arm 27 is pivoted about the support shaft 26 in the directions of arrows A and B by the opening / closing lever 25 connected to the opening / closing arm 27. The opening / closing member 9B at the time of opening is provided at a middle portion of the opening / closing arm 27.
A receiving roller 29 is provided.

The rotating ring body 8 includes a lower surface holding device 31 for holding the lower surface of the steel prism P, side holding devices 32A and 32B for holding both side surfaces of the steel prism P, and a steel prism P.
An upper surface holding device 33 for holding the upper surface of each is provided.

That is, as shown in FIG. 6, the lower surface holding device 31 is provided with female screw members 35A and 35B on vertical screw shafts 34A and 34B arranged on both sides of the rotating ring body 8 via bearings. The lower clamp body 36 is supported so as to be able to move up and down, and one drive shaft 37 operatively connected to the lower ends of the vertical screw shafts 34A and 34B via bevel gears 36A and 36B, respectively.
8, the lower surface clamp body 35 is rotated up and down via the gears 39A and 39B to hold the lower surface of the steel prism P.

Further, the side holding devices 32A and 32B are connected to the left and right horizontal screw shafts 41A and 41B disposed on both sides of the lower surface clamp body 33 via bearings via side screw members 42A and 42B. Body 43A, 4
3B are disposed so as to be movable close to and away from each other, and gears 45A, 45
The lateral screw shafts 41A and 41B are rotated through B to move the side clamp bodies 43A and 43B closer to and away from each other, and are held in contact with both side surfaces of the steel prism P.

Further, the upper surface holding device 33 includes an opening / closing member 9.
B, an upper surface clamp body 47 is attached to output rods of a pair of left and right upper surface clamp jack devices 46A, 46B provided on the opening / closing member 9B, and both upper surface clamp jacks are driven by an upper surface clamp electric motor 48. The devices 46A and 46B are driven to lower the upper surface clamp body 47 so as to abut and hold the upper surface of the steel prism P.

The electric motors 38, 44A, 44
After the power supply to B, 46, 56 is stopped at the upright position, a power cable from a control device (not shown) provided on the movable frames 7A, 7B is connected to the rotating ring body 8 via a power connector. Then, after the steel prism P is held, the rotating ring body 8 is configured to rotate while the power supply connector is disconnected and the power supply is stopped.

Next, the work loading operation will be described. The front and rear moving bases 7A and 7B are stopped at predetermined positions in accordance with the steel prism P. The rotating ring body 8 is fixed in the upright position, and the lock device 22 is released. That is, the lock electric motor 5
6, the spline shaft 54 is rotated via the worm gear mechanism (55, 57) and the spline hole 53
c, the lock pins 53A, 53B are rotated by the screw mechanism (52a, 53a).
B is retracted from the locking holes 62A, 62B. Then, the opening / closing cylinder device 24 of the opening / closing device 23 is contracted to rotate the opening / closing arm 27 in the direction of arrow A, and the opening / closing member 9B is opened to open the opening 8a. Then, based on the data of the steel prism P input in advance, the lower surface clamping electric motor 38 of the lower surface holding device 31 is started, and the vertical screw shafts 34A, 34B are rotated via the drive shaft 37, so that the lower surface clamp body 35 is moved. Move up and down to the holding position. Next, the right side clamp electric motor 44A of the side holding device 32 is activated to rotate the horizontal screw shaft 41A, thereby moving the right side clamp body 43A to the holding position. Then, the steel prism P is carried in from the opening 8a by a crane or the like, the holding portion is placed on the lower surface clamp body 35, the other side clamp electric motor 44B is activated to rotate the horizontal screw shaft 41B, and The side clamp body 43B is moved closer to contact the side surface of the holding section, and further moved to sandwich both sides of the holding section of the steel prism P by the both side clamp bodies 43A and 43B to center the steel prism P. . Further, the opening / closing cylinder device 24 is advanced, the opening / closing arm 27 is rotated in the direction of arrow B to close the opening / closing member 9B, and the lock device 22 is operated. That is, the lock pins 53A, 53B are rotated by the lock electric motor 56 via the worm gear mechanism (55, 57) and the spline shaft 54, and the lock pins 53A, 53B are locked by the screw mechanism (52a, 53a). Protrude to 62B. After fixing the opening / closing member 9B, the upper surface clamping jacks 46A and 46B are driven by the upper surface clamping electric motor 48 of the upper surface holding device 33 to bring the upper surface clamping body 47 into contact with the upper surface of the steel prism P, and Pressure to clamp the steel prism P.

Thus, the rotation driving motor 18 is started to rotate the steel prism P about the axis via the rotating ring body 8, and the welding operation of an arbitrary surface is performed by the automatic welding device. After the welding work is finished, the steel prism P is carried out by first releasing the upper surface holding device 33, then releasing the lock device 22, opening the opening / closing member 9B in the direction of arrow A by the opening / closing device 23, and releasing the side surface holding device 32. Then, the steel prism P may be carried out.

During the welding operation, the work reversing device carries out the work of loading and unloading and releasing the steel prism P, thereby minimizing the waiting time of the automatic welding device 2 and improving the operation rate. Can be.

[0025]

As described above, according to the present invention, the lock pin is rotated via the drive shaft by the lock rotary drive device disposed between the lock pins, and the lock pin is projected or projected via the screw mechanism. By retreating, the opening / closing member can be firmly locked or easily released by being fitted or pulled out of the locking hole of the locking plate externally fitted to both side surfaces on the other end side of the opening. Therefore, a large fixing force can be obtained by protruding the two lock pins in the symmetrical direction and fixing the locking rates on both sides, and the two lock pins are rotated by the screw mechanism, the drive shaft, and the gear mechanism. With this structure, the rotation driving device for locking can be arranged between the two lock pins, the whole can be made compact, and even a rotating ring body having a limited installation space can be easily installed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a lock device provided on a rotating ring body of a work reversing device according to the present invention.

FIG. 2 is a front sectional view showing a rotating ring body of the work reversing device.

FIG. 3 is a front view showing a movable gantry of the work reversing device.

FIG. 4 is a side view showing a movable gantry of the work reversing device.

FIG. 5 is a cross-sectional view showing a rotary ring body rotation drive unit of the work reversing device.

FIG. 6 is an enlarged sectional view showing a lower surface holding device and a side surface holding device of the work reversing device.

FIG. 7 is a schematic plan view showing a column welding equipment provided with the work reversing device.

FIG. 8 is a partial perspective view showing column welding equipment provided with the work reversing device.

FIG. 9 is a front view showing a conventional work reversing device.

[Explanation of symbols]

 P Steel prism 1A, 1B Work reversing device 2 Automatic welding device 7A, 7B Moving stand 8 Rotating ring body 8a Opening 9A Ring body 9B Opening / closing member 21 Horizontal pin 22 Locking device 23 Opening / closing device 31 Bottom holding device 32 Side holding device 33 Top surface Retaining device 52A, 52B Boss 52a Reverse screw hole 53A, 53B Lock pin 53a Male thread 53c Spline hole 54 Spline shaft 55 Worm wheel 56 Electric motor for locking 57 Worm 61A, 61B Lock plate 62A, 62B Lock hole

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masashi Imamoto 5-3-28 Nishikujo, Konohana-ku, Osaka-shi, Japan Inside Hitachi Zosen Corporation (72) Inventor Hideki Kobayashi 5 Nishikujo, Konohana-ku, Osaka-shi, Osaka No. 3-28, Hitachi Zosen Corporation (56) References JP-A-53-81447 (JP, A) JP-A-59-125297 (JP, A)

Claims (1)

(57) [Claims] 1. A rotating ring body rotatably supported on a gantry about a horizontal axis, and a plurality of work holding devices provided on the rotating ring body and capable of holding a work. In a work reversing device comprising a ring main body having an opening which can be inserted and withdrawn, and an opening and closing member which can open and close the opening, one end of the opening and closing member is connected via a horizontal pin parallel to the rotating ring body axis direction. The ring body is rotatably attached to one end of the opening of the ring body, and the other end is fitted on both outer surfaces along the rotation surface of the other end of the opening of the ring body, and a locking hole is formed at a facing position. A pair of locking plates, and a pair of locking pins which are reciprocated in the axial direction of the rotating ring body at symmetrical positions and can be respectively inserted into and removed from the locking holes on the other end side of the opening of the ring body. Drive shafts connected to each other A locking device for a rotating body opening / closing portion in a work reversing device, comprising: a screw mechanism for rotating and retracting via a screw; and a locking rotation drive device for rotating the drive shaft forward / reverse via a gear mechanism.