JPH0650111Y2 - Reversing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to improvement of a reversing device used for welding work such as bridge box girders.

[Prior Art and Problems Therefor] For example, it is necessary to invert the box girder in order to weld the four faces of the box girder having a quadrangular cross section in a downward posture. For this reason, conventionally, as shown in FIGS. 5 and 6, the reversing device (sefturn) 1 is hung on the crane by the wire 2, the wire 3 of the sefturn 1 is hung around the reversible object 4, and then it is lifted by the wire. Some are designed to move in reverse. (See, for example, Japanese Patent Laid-Open No. 51-69868) However, in such a device, slinging for hanging the Sefturn 1 on a crane, laying-off work, work for hanging the wire 3 of the Sefturn 1 on the reversal object 4, and the like. It is necessary, and the work may be hindered by waiting for the crane.

Further, as a means for solving such a problem, there has been proposed a means for setting an endless chain on a reversal object and lifting and reversing it without using a crane, as shown in FIG. (See WELTEC Vol. 4, issued October 10, 1988, or Japanese Patent Laid-Open No. 61-37646.) This reversing device pushes up the sprocket 11 with the cylinder 12 to lift the suspended reversal object. I had the following problems.

That is, in FIG. 7, the horizontal component force of the tension T of the endless chain 13 caused by the weight of the reversal object always causes the cylinder rod 14 to generate a bending force. Therefore, the seal portion between the cylinder 12 and the rod 14 is squeezed, and the friction at this portion is severe.
In addition, since the reversal object is a considerable weight object, when reversing the reversal object, a considerably large shake occurs, and the force due to this shake acts on the rod 14 to cause deformation of the rod 14. . Therefore, the cylinder 12 has to have sufficient strength and endurance, and there is an economical and facility defect that a large cylinder 12 must be used.

And, since the reversal object is a long heavy object, it is 3 in the longitudinal direction.
Since it hangs 4 or 4 places, for example, when 3 places are hung, a total of 6 cylinders 12 are required.
In addition, there is a technical problem that all the strokes of the cylinders 12 at these six locations must be synchronized.

If the stroke length of each cylinder 12 or the timing is misaligned at the time of reversing, the reversing of the reversible object, which is a long heavy object, may not go as intended by the worker, causing an accident. There is a problem of becoming.

Also, since the endless chain 13 is hung, the endless chain 13 stretched between the sprockets 11 is pushed down, so there is a possibility that the reversal object will fall out when reversing, damage the sprocket 11 and cylinder 12, or Further, there is an inconvenience that an unexpected accident occurs.

An object of the present invention is to convey an inversion object by a conveyance carriage along, for example, a welding work line, and to reverse it by a reversing carriage mounted on this conveyance carriage. In addition, by moving the reversing carriage with respect to the conveyance carriage. By reversing and setting the reversal object to a position with good welding workability,
It is intended to provide a device capable of improving workability such as welding.

[Means for Solving the Problems] The configuration of the present invention for solving the problems of the prior art is provided with an inversion carriage that lifts and inverts an inversion object, and an elevating platform that elevates and lowers with a jack or the like. , 2 left and right
In a reversing device in which each sprocket is pivotally supported, and a long endless chain that holds and inverts reversal objects is surrounded by these two sprockets is suspended. The two carriages that move along the above and convey the above-mentioned inverted products are movably mounted on the carriages in the direction orthogonal to the traveling direction of the carriages. At the lower end portion of the jack which is moved up and down, a tension wheel is provided at the lower end portion so as to come into contact with the substantially central upper side of the endless chain between both sprockets.

[Embodiment] Next, details of an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view, FIG. 2 is a side view of the same, FIG. 3 is an explanatory view of a reversing operation of a long heavy object (reversing object), and FIG. 4 is an explanatory view showing the arrangement and operation relationship of the device of the present invention. Is.

In FIG. 1, reference numeral 21 is a work table provided on a floor surface 22, and one rail 23a along the work table 21 is provided on the floor surface 22 at an appropriate distance from the front surface of the work table 21. Is laid,
On the outer side surface of the work table 21, support columns 24 higher than the work table 21 are erected at appropriate intervals, and between the support columns 24, the other rails 23b parallel to the one rail 23a. Is supported on board.

A is a carrier vehicle having a self-propelled function, which is composed of a frame structure whose front shape is "shaped" and which is mounted on the rails 23a and 23b in a bridge manner. As shown in FIG. 1, the frame structure of the shape is composed of a cross beam 25 slightly longer than the distance between the rails 23a and 23b and a vertical post 26 provided at the lower end of one side of the cross beam 25. Consists of a framework,
Further, the lower end of the column 26 is fixed on a carriage 28 having wheels 27 mounted on the one rail 23a. On the other hand, at the lower end on the other side of the cross beam 25, wheels 29 mounted on the other rail 23b are provided. In addition, the framework structure may be a gate structure without being limited to the shape.
Reference numeral 30 is a drive mechanism mounted on the carriage 28.

As is clear from FIGS. 1 and 2, two parallel guide rails 31 along the longitudinal axis of the horizontal beam 25 are laid on the horizontal beam 25 constituting the carrier A.
Wheels 32 of a carriage 33 connected to a drive mechanism 32a are mounted on the 31. Then, a jack 34 that penetrates the carriage 33 and protrudes downward greatly is attached to a substantially central portion of the carriage 33 in an upward posture, and a rotation axis of the horizontal beam 25 of the horizontal beam 25 is attached to a lower end portion of the jack 34. A sprocket-structured tension wheel 36, which is orthogonal to the longitudinal direction line and is connected to a drive mechanism 35, is pivotally supported.

The reference numeral 37 designates an elevating / lowering platform having a downward U-shaped front shape which is vertically moved by the jack 34 by a predetermined stroke and is guided between a pair of left and right guide columns 38 standing on the upper surface of the truck 33. The right and left vertical rods 37a of the lifting platform 37 are used as the lower ends, and the sprockets 39 which are located on the same plane as the tension wheel 36 are pivotally supported. Both sprockets 39 arranged on the right and left sides of the tensioning wheel 36 are configured to be positioned higher than the tensioning wheel 36. The above-described structure constitutes the reversing carriage B.

Reference numeral 40 denotes a long endless chain which is surrounded by the tensioning wheel 36 and the left and right sprockets 39 and which lifts and reverses a reversible object 41 which is a long heavy object such as a box girder.
Further, 42 is a left and right lower surface of the bogie 33, and also a counterweight suspended outside the left and right sprockets 39, which has an action of opening the endless chain 40 in the unloaded state left and right. .

43 is a plate-like chain receiver that can be placed on the floor surface 22 between the work table 21 and the rail 23a, and the side surface shape is an isosceles triangle in the center of the upper and left end edges of the chain receiver 43. A suspender 44 having a shape (not shown) is attached, and wire ropes 46 are respectively provided between the top of the suspender 44 and the hoists 45 arranged at the left and right ends of the carriage 33.
, And by hoisting and rewinding the hoist 45,
The chain receiver 43 on which the endless chain 40 is mounted is configured to be able to move up and down. For example, when the traveling carriage A is moved in order to jump over the inversion object 41 in the front and invert the inversion object 41 in the rear, The endless chain 40 in the state can be avoided above the reversal object 41 so as not to hit it.

Incidentally, reference numeral 47 in the figure denotes a stopper of the carriage 33. Further, as is clear from FIG. 1, the length of the endless chain 40 is the length corresponding to the width between the counterweights 42 when the lifting platform 37 is at the lowest position. It is desirable that the length be set on the chain receiver 43.
By doing so, although not shown in particular, the endless chain 40 on the chain receiver 43 smoothly intervenes in the gap formed between the lower surface of the reversal object 41 placed on the sleeper and the floor soil surface 2. That is, the endless chain 40 against the reversal 41
The slinging work is easy. The device of the present invention uses two reversing devices as a set, as shown in FIG.

[Description of Operation] Next, the operation will be described based on the above-mentioned embodiment.
As shown in FIG. 4, between the work table 21 for welding or the like and the rail 23a laid on the floor surface 22, set an inverted object 41 such as a box girder placed on a sleeper (not shown), A predetermined welding operation is performed by a movable welding torch provided on the work table 21. After the predetermined work is completed, this reversal object 41 is conveyed to the next work process, or the reversal object 41 is 90 ° on the spot, or,
When reversing 180 °, the lower part of the endless chain 40 is supported by the chain receiver 43, and the counterweight 42
Holds the posture of being greatly opened to the side by
The left and right transport carriages A at the positions indicated by the phantom lines in the figure are transported in the directions of the arrows, and the above-mentioned reversal object 41 arranged along the work table 21 is mounted on both transport carriages A. Pass through the endless chain 40 of the reversing carriage B, and stop both transport carriages A at the position indicated by the solid line.

In this state, the jack 34 of the reversing carriage B is driven to move the lifting platform.
When 37 is moved up along the guide column 38 to the position shown by the phantom line in FIG. 1, the endless chain 40 is supported by both sprockets 39 which are pivotally supported on the lower end of the vertical rod 37a which constitutes the lifting platform 37.
And the reversal object 41 is raised. Tension car in this state
When 36 is driven to the left or right, the endless chain
The reversal object 41 supported by 40 is rotated as shown by the phantom line in FIG. 1 to be reversed by 90 ° or 180 °. When the new welding work surface becomes the upper surface due to this reversal, the rotation drive of the tensioning wheel 36 is stopped, and the reversal object 41 is lowered and placed on the sleeper by the lowering operation of the jack 34.
In a state of being in a hanging relationship with the reversal object 41, the transport carriage A is moved in the opposite direction to the above and is retracted to the position shown by the phantom line in FIG. Further, when the reversal object 41 is conveyed to the next process in the posture as it is, as shown in FIG.
Away from the sleepers upwards and both hoists 45
Then, the wire rope 46 is wound up, and the carriage A is moved to a predetermined work position along the tracks 23a and 23b with the chain receiver 43 positioned above the sleepers.

Further, for example, in the case of transporting and reversing the backward reversal object 41 over the conveying cart A, for example, over the set front reversing article 41, the hoist 45 of the reversing cart B hoists the wire rope 46. The carrier carriage A can jump over the reversing object 41 by hoisting the chain receiver 43 to a higher place than the reversing object 41 in front and by mounting the endless chain 40 on the chain receiver 43.

Further, by horizontally moving the reversing carriage B with respect to the transport carriage A, the reversing body 41 suspended on the reversing carriage B is adjusted to be close to or away from the workbench 21, so that the reversing body 41 can be easily moved to a position where various operations can be performed. Can be set.

[Effect of the Invention] According to the configuration of the present invention as described above, the following effects can be obtained.

(A) When the weight of the reversal object is applied to the endless chain because both sprockets for moving the endless chain around and a tensioning wheel in the middle of both sprockets are installed on the lifting platform that is lifted by the jack. In addition, the positional relationship between the sprocket, tension wheel, and the center of gravity of the reversal object is always constant, the tension acting on the endless chain is evenly distributed, and the lifting stroke of the lifting platform is only half, which improves workability. Can be improved and the worker can reverse the work as expected, and there is no accident caused by this.

(B) Furthermore, since the number of sprockets and the number of cylinders are smaller than in the prior art, the entire device becomes compact, and the sprocket is fixed, and the lifting and lowering operation of the jack can be performed by hanging the endless chain. Is not directly affected, it is stable and the jack is easy to control.

(C) Since the reversing carriage that can move in the direction orthogonal to the conveying direction is mounted on the conveying carriage, not only the reversing carriage can be moved and adjusted according to the size of the reversed body, but also the reversed body can be moved. It can be placed close to the workbench for easier work, and workability can be improved.

[Brief description of drawings]

FIG. 1 is a front view, FIG. 2 is a side view of the same, FIG. 3 is an explanatory view of a reversing operation of a long heavy object (reversing object), and FIG. 4 is an explanatory view showing the arrangement and operation relationship of the device of the present invention. 5 to 7 are explanatory views of the prior art. 21 ... Workbench, 22 ... Floor, 23a, 23b ... Rail, 24 ... Supporting pillar, 25 ...
Cross beam, 26 ... Post, 27 ... Wheel, 28 ... Truck, 29 ... Wheel, 30 ... Driving mechanism, 31 ... Guide rail, 32a ... Driving mechanism, 32 ... Wheel, 33 ... Truck, 34 ... Jack, 35 ... Driving mechanism, 36… tension car, 37… lift platform, 37a… right and left vertical rods, 38… guide columns, 39… sprockets, 4
0… Endless chain, 41… Reversed object, 42… Counter weight, 43… Chain receiver, 44… Suspension tool, 45… Hoist, 46… Wire rope, 47… Stopper, A… Conveying cart, B… Reversing cart.

Claims (1)

[Scope of utility model registration request] 1. A reversing carriage for lifting and reversing a reversal object is provided with an elevating and lowering platform for elevating and lowering with a jack or the like, and two sprocket wheels, which are separated from each other in the left and right directions, are axially supported at the lower part of the elevating and lowering platform. In a reversing device in which a long endless chain that holds and inverts a reversal object is suspended between both sprockets, the reversing carriage is moved along a welding work table to be installed on the floor surface, and the reversal object is It is mounted on two transport carriages for transporting the movably in a direction orthogonal to the traveling direction of the transport carriages, and on the other hand, on the lower end portion of the jack in the upward operation posture that lifts and lowers the elevating and lowering platform provided in each of the reversing carriages. ,
A reversing device provided with a tensioning wheel that comes into contact with the substantially central upper side of the endless chain between both sprockets.