JP2013081993A - Device for changing orientation of heavy cargo - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency by reducing restriction on orientations changeable in a welding operation of each part of a box girder.SOLUTION: A device for changing orientation includes a rotary support base 1 having a mounting roller 2, and a coupling ring 4 supported by the mounting roller 2 to be rotatable around a horizontal shaft 4a on the rotary support base 1. The coupling ring 4 has one pair of divided bodies 5, 6 mutually divided in a circumferential direction around the horizontal shaft 4a and having detachable both coupling ends 7. A containing area 8 is disposed inside of each of the divided bodies 5, 6. In a containing chamber 10 formed by the containing areas 8 of the respective divided bodies 5, 6 inside of the coupling ring 4 for mutually coupling the respective divided bodies 5, 6 at the both coupling ends 7, each of the divided bodies 5, 6 includes a plurality of screw jacks 11 nipping and holding the box girder 13 while inserting the box girder 13 into the containing areas 8 of the respective mutually divided bodies 5, 6 and mutually coupling the respective divided bodies 5, 6 by the both coupling ends 7. A radial orientation of the coupling ring 4 mounted on the mounting roller 2 of the rotary support base 1 is changed with rotation of the coupling ring 4.

Description

  The present invention relates to a heavy article direction changing device that changes the direction of a box girder, for example, in order to efficiently perform welding work of each part in the process of manufacturing a box girder of a bridge.

  Conventionally, as this type of heavy object direction changing device, for example, a heavy object reversing mechanism disclosed in Patent Document 1 described below is known. This heavy object reversing mechanism is supported on a base 4 (rotation support base) having a roller 5 (mounting roller) and an outer peripheral rotation surface 2 (guide surface) on the roller 5. And a U-shaped reversing guide body 3 that can rotate around the horizontal axis. Inside the reversing guide body 3, a pair of receiving support plates 8 and 9 are provided which can adjust the distance. The direction of the workpiece W can be changed by rotating the reversing guide body 3 in a state where the workpiece W (heavy object) is sandwiched between the receiving support plates 8 and 9.

JP-A-5-155427

  However, in the heavy object reversing mechanism disclosed in Patent Document 1 described above, the workpiece W can be changed upward, obliquely upward, or laterally, but the pair of receiving support plates 8, 9 are in their directions. Since it is open, the workpiece W cannot be changed downward, and the changeable direction is limited. For example, when this heavy load reversing mechanism is used in the process of manufacturing a box girder for a bridge, the changeable direction is limited, so that the welding operation of each part of the box girder cannot be performed efficiently.

  Therefore, conventionally, the box girder is welded while the box girder is lifted by a crane and the direction is changed. However, the work for changing the direction of the crane takes time, and the crane cannot be used for other work while the work for changing the direction is being performed. It was.

  The present invention has developed a heavy load direction changing device that eliminates the problem of the heavy load reversing mechanism disclosed in Patent Document 1 and reduces the limit of the changeable direction. For example, welding work for each part of a box girder The purpose is to improve the working efficiency by reducing the crane usage time.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 9) of the embodiments described later.
The heavy object direction changing apparatus according to the first aspect of the present invention is configured as follows.
The heavy object direction changing device includes a rotation support base (1) having a placement roller (2) and a horizontal axis (4a) on the rotation support base (1) supported on the placement roller (2). And a connecting ring (4) capable of rotating. The connecting ring (4) includes a plurality of divided bodies (5, 6) having both connecting end portions (7) which are separated from each other in the circumferential direction about the horizontal axis (4a) and can be attached and detached. Inside each of the divided bodies (5, 6), an opening is provided by an accommodation port (8a) provided between the connecting end portions (7) and an accommodation port (8b) provided on both sides in the direction of the horizontal axis (4a). An enclosed storage area (8) is provided. A storage chamber (10) formed by a storage area (8) of each divided body (5, 6) inside a connecting ring (4) in which each divided body (5, 6) is connected to each other at both connecting ends (7). ), Each divided body (5, 6) of the connecting ring (4) has a heavy object (8a, 8b) from the separated openings (5, 6) separated from each other to the receiving area (8). 13) is inserted, and the respective divided bodies (5, 6) are connected to each other by both connecting ends (7), and a plurality of clamps (11) are provided to hold and hold the heavy object (13). Yes. The radial direction of the connecting ring (4) placed on the mounting roller (2) of the rotation support base (1) can be changed with the rotation of the connecting ring (4).

  In the invention of claim 1, since the heavy object (13) is surrounded by the entire circumference of the connecting ring (4), the restriction of the changeable direction of the heavy object (13) can be reduced, and the working efficiency can be improved. . Further, since the respective divided bodies (5, 6) can be separated from each other, the heavy objects (13) can be easily inserted into and removed from the respective divided bodies (5, 6) through the accommodation ports (8a, 8b).

  In the invention of claim 2 premised on the invention of claim 1, the clamps (11) are arranged in parallel in the circumferential direction around the horizontal axis (4a) on the inner periphery of the connecting ring (4). . In invention of Claim 2, it is easy to respond to the change of the form of a heavy article (13).

  In the invention of claim 3 based on the invention of claim 2, the clamp (11) has a pressure contact part (11a) capable of moving forward and backward in the radial direction of the connecting ring (4). In invention of Claim 3, it is easier to respond by changing the form of the heavy article (13).

  In the invention of claim 4 based on the invention of claim 3, the clamp (11) is a jack. In invention of Claim 4, the clamp (11) which utilized the existing jack effectively can be employ | adopted.

  Based on the invention of any one of claims 1 to 4, the two connecting ends (7) of the divided bodies (5, 6) according to the invention of claim 5 are connected to each other. Of the two divided bodies (5, 6), the connecting end (7) of one divided body (5) is provided with a recess (15), and the connecting end (7) of the other divided body (6) is provided. A convex portion (19) is provided, and the concave portion (15) and the convex portion (19) are detachably fitted to each other, and are fixed so as not to be detachable by a stopper means such as a stopper pin (17). In invention of Claim 5, it is easy to attach or detach each division body (5, 6) mutually.

  The invention according to claim 6 premised on the invention of any one of claims 1 to 5, wherein the connecting ring (4) has a circumferential angle of 180 degrees between both connecting ends (7). It consists of a pair of division body (5, 6) which has. In invention of Claim 6, it is easier to insert and remove a heavy article (13) by each divided body (5, 6).

  In the invention of Claim 7 premised on the invention of any one of Claims 1 to 6, the outer periphery of the connecting ring (4) has a circular shape centered on the horizontal axis (4a). A guide surface (12) is provided, and the guide surface (12) is supported on the placement roller (2). In invention of Claim 7, a connection ring (4) can be smoothly rotated in the range of 360 degree | times on a rotation support stand (1).

  The present invention can improve work efficiency by reducing the limit of changeable orientation in welding work of heavy parts such as a box girder (13), for example.

(A) is a front view which shows the installation state of the lower division body of one connection ring among both connection rings in the heavy article direction change apparatus concerning this embodiment, (b) is a side view similarly. It is a side view which shows a heavy article mounting state in the installation state of the lower division body of the said both connection rings. It is a front view which shows a heavy article mounting state in the installation state of the lower division body of the said both connection rings. (A) is a front view which shows the upper division body of one connection ring among the said both connection rings, (b) is a front view which shows the heavy article set state in the division body connection state of the said both connection rings. It is a side view which shows a heavy article set state in the division body connection state of the said both connection rings. (A) is a partial side view which shows a connection end part in the division body non-connection state of the said both connection rings, (b) is a partial front view similarly. (A) is a partial side view which shows a connection end part in the division body connection state of the said both connection rings, (b) is a partial front view similarly. (A) is sectional drawing which looked at the screw jack from the front side, (b) is sectional drawing similarly seen from the side surface side. FIG. 4B is a diagram corresponding to FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, a heavy article direction changing device according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG.5 and FIG.4 (b), the rotation support stand 1 is installed in the both sides of the horizontal direction. A pair of placement rollers 2 is attached on each rotation support base 1. At least one of the mounting rollers 2 of each rotation support base 1 is rotated by an electric motor 3. A connecting ring 4 that can rotate around the horizontal axis 4 a on each rotation support 1 is provided. The connecting ring 4 includes a pair of divided bodies 5 and 6 that are connected to each other in the circumferential direction about the horizontal axis 4a. One divided body 5 shown in FIGS. 1 (a) and 1 (b) and the other divided body 6 shown in FIG. 4 (a) are separated from each other. A storage area 8 having a circumferential angle and opened by a storage port 8a provided between both connecting end portions 7 and a storage port 8b provided on both sides in the direction of the horizontal axis 4a is provided. ing. A storage chamber 10 is formed by the storage area 8 of each of the divided bodies 5 and 6 inside the connecting ring 4 in which the divided bodies 5 and 6 are connected to each other at both connecting ends 7. In the storage chamber 10, each of the divided members 5 and 6 of the connecting ring 4 has a clamp which is a screw jack 11 as shown in FIGS. 8 (a) and 8 (b) around the horizontal axis 4 a at the inner periphery of the connecting ring 4. For example, four pieces are arranged in parallel in each of the divided bodies 5 and 6 in the circumferential direction. On the outer periphery of the connecting ring 4, a circular guide surface 12 centered on the horizontal axis 4 a is provided over the entire portion between the divided bodies 5 and 6 and supported on the mounting roller 2. When the mounting roller 2 is rotated by the electric motor 3, the radial direction around the horizontal axis 4a can be changed within a range of 360 degrees while the connecting ring 4 is supported by the mounting roller 2 by the guide surface 12.

The outline of the procedure for assembling the heavy-weight change device outlined above will be described.
As shown in FIGS. 1 (a) and 1 (b), one of the divided bodies 5 and 6 separated from each other is suspended by a crane and carried above the respective rotation support bases 1, and The guide surface 12 is detachably mounted on the mounting roller 2 and supported. As shown in FIGS. 6 (a) and 6 (b), in the connecting end portion 7 of one divided body 5, recesses 15 are provided between the stopper plates 14 on both sides in the radial direction centering on the horizontal axis 4a. In addition, both stop plates 14 are provided with stop holes 16 communicating with the recesses 15, and stop pins 17 (stop means) are retracted from the recesses 15 by operating the levers 18.

  As shown in FIGS. 2 and 3, a box girder 13 as a heavy object is suspended by a crane and inserted into the accommodation area 8 of both divided bodies 5 from the accommodation ports 8 a and 8 b in the direction of the arrow, for example. At that time, the press contact portion 11 a at the head of the screw jack 11 is moved forward and backward in the radial direction of the connecting ring 4 and temporarily applied to the box girder 13.

  In the connecting end portion 7 of the other divided body 6 shown in FIG. 4A, as shown in FIGS. 6A and 6B, stop plates 19 (protrusions) are formed on both sides in the radial direction around the horizontal axis 4a. Part), and a stop hole 20 is provided in the stop plate 19. The other divided body 6 is hung by a crane and covered from above the box girder 13 as shown in FIGS. 4B and 5, and the connecting end portions 7 of the divided bodies 5 and 6 are aligned with each other. At that time, as shown in FIGS. 7A and 7B, the stop plate 19 is detachably fitted into the recess 15, the stop holes 16 and 20 are aligned with each other, and the stop pin 17 is operated by operating the lever 18. The recess 15 and the stop plate 19 are fixed to each other so as not to be detachable. Thereafter, the screw jack 11 is tightened to hold the box girder 13 between the press contact portions 11a.

  In the weight direction changing device assembled in this way, the connecting ring 4 is rotated together with the box girder 13 to change the radial direction around the horizontal axis 4a within a range of 360 degrees while performing welding work or the like. Do.

After the completion of the work, the box girder 13 is removed from the heavy object direction changing device by the separation procedure reverse to the assembly procedure described above.
This embodiment has the following effects.

  (1) Since the box girder 13 is surrounded by the entire circumference of the connecting ring 4, the connecting ring 4 can be smoothly rotated in the range of 360 degrees on the rotation support base 1. Therefore, the work efficiency can be improved by reducing the limit of the changeable direction in the welding operation of each part of the box girder 13.

  (2) In the connection ring 4, after inserting the box girder 13 into the accommodation area 8 from the accommodation ports 8a and 8b of the pair of division bodies 5 and 6 separated from each other, the division bodies 5 and 6 are connected to both connection end portions. 7 can be connected to each other, so that the box girder 13 can be easily inserted into the connecting ring 4. Further, in the connecting ring 4, the box beams 13 can be easily detached from the connecting ring 4 after separating the divided bodies 5 and 6 from each other.

  (3) By adopting a plurality of screw jacks 11 arranged in parallel in the circumferential direction around the horizontal axis 4a on the inner periphery of the connecting ring 4, the press contact portion 11a is advanced and retracted in the radial direction of the connecting ring 4 so that the box girder Since 13 can be held, it is easy to cope with a change in the form of the box girder 13.

  (4) Since the recessed portion 15 and the stop plate 19 are detachably fitted to each other at the connecting end portions 7 of the respective divided bodies 5 and 6, and are fixed by the stop pins 17 so as not to be detachable. Are easy to detach from each other.

For example, the following embodiment may be configured as follows.
-As shown in FIG. 9, when the form of the box girder 13 is changed, the screw jack 11 is attached to the space | interval holding | maintenance base 11b attached to the inner periphery of each division body 5 and 6. As shown in FIG.

-As the jack, in addition to a mechanical jack such as the screw jack 11, an existing hydraulic jack or pneumatic jack can be used.
The connecting ring 4 can be divided into three or more parts by a plurality of divided bodies.

  DESCRIPTION OF SYMBOLS 1 ... Rotation support stand, 2 ... Mounting roller, 4 ... Connection ring, 4a ... Horizontal axis, 5, 6 ... Divided body, 7 ... Connection end, 8 ... Storage area, 8a, 8b ... Storage port, 10 ... Storage Chamber, 11 ... Screw jack (clamp), 11a ... Pressure contact portion, 12 ... Guide surface, 13 ... Box girder (heavy), 15 ... Recess, 17 ... Stop pin (stop means), 19 ... Stop plate (convex) .

Claims (7)

A rotation support base having a placement roller; and a connecting ring supported on the placement roller and capable of rotating about the horizontal axis on the rotation support base;
The connecting ring includes a plurality of divided bodies having both connecting end portions that are separated from each other in the circumferential direction about the horizontal axis and can be attached and detached, and a housing provided between the connecting end portions inside each divided body. An open storage area is provided between the opening and the storage opening provided on both sides in the horizontal axis direction.
In the storage chamber formed by the storage area of each divided body inside the connecting ring in which the respective divided bodies are connected to each other at both connecting ends, each divided body of the connecting ring has a receiving port for each divided body separated from each other. A plurality of clamps for holding and holding the heavy load in a state in which the heavy load is inserted into the storage area and the divided bodies are connected to each other by both connecting ends,
The heavy object direction changing device characterized in that the direction in the radial direction of the connecting ring mounted on the mounting roller of the rotation support base can be changed with the rotation of the connecting ring.   The heavy load direction changing device according to claim 1, wherein the clamps are arranged in parallel in a circumferential direction around the horizontal axis on the inner circumference of the connecting ring.   The heavy load direction changing device according to claim 2, wherein the clamp has a pressure contact portion that can advance and retreat in a radial direction of the connecting ring.   The heavy load direction changing device according to claim 3, wherein the clamp is a jack.   Of the two divided bodies that are connected to each other at both connecting ends of each divided body, a connecting end of one divided body is provided with a recess, and a connecting end of the other divided body is provided with a convex portion, The heavy article direction change according to any one of claims 1 to 4, wherein the concave portion and the convex portion are detachably fitted to each other and fixed by a stopping means so as not to be detachable. apparatus.   The said connection ring consists of a pair of division body which has the circumference angle of 180 degree | times between both connection edge parts, The heavy article direction as described in any one of Claims 1-5 characterized by the above-mentioned. Change device.   7. A circular guide surface centering on the horizontal axis is provided on the outer periphery of the connecting ring, and the guide surface is supported on a mounting roller. The heavy-duty direction changing device according to claim.