JP2000272732A - Carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To moderate the backrush based on the speed difference caused between conveyors by connecting two lines of chain conveyors through round bars in a ladder form, and rotatably fitting a pipe onto the circumference of each round bar. SOLUTION: Two lines of parallel chain conveyors 4 are set, and the respective upper chains are moved on a support frame 5. Each conveyor 4 is endlessly wound on a common drive wheel and driven wheel, and a take up for the chain is further provided. The chain conveyors 4 of the two lines are mutually connected through round bars 6 in a ladder form. Receiving bases 7 for supporting the ends of the round bars 6 are fixed to the chain conveyors 4 at prescribed intervals. The round bars 6 are fixed to the receiving bases 7. Further, a pipe 8 is rotatably fitted onto the circumference of each round bar 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport device suitable for transporting a long or long object such as a built-up longe for shipbuilding.

[0002]

2. Description of the Related Art In an automatic assembly of a built-up longe for shipbuilding, a carry-in conveyor 11 and a carry-out conveyor 12 are arranged before and after an assembling apparatus 10 as shown in FIG. And so on. Here, a roller conveyor is generally used for the carry-in conveyor 11 and the carry-out conveyor 12, and a feed roller 13 is also provided inside the assembly device 10. The assembling apparatus 10 is an automatic machine for performing welding, fusing, and the like of materials, and is, for example, an automatic welding machine for fillet-welding the face material 2 of the long material 1 and the web material 3.

If the conveyed material is a very long material such as the above-mentioned long material 1, it is necessary to support the material before and after a processing machine such as the assembling apparatus 10 and the like, as shown in FIG.
Independent conveyors 11 to 13 (or 2 types)
May be straddled. It is necessary to perform welding at a predetermined welding speed in the assembling apparatus 10, and the carry-in / out conveyors 11, 12 and the feed conveyor 13 inside the assembling apparatus 10 control the conveyor speed so as to maintain the welding speed constant. There is a need to. In the conventional case, the processing speed (eg, welding speed) is controlled by controlling the conveyor speed.
Was maintained.

[0004]

However, since the state of the load on each of the conveyors changes, a speed difference occurs between the three types of conveyors, and a backlash (arrow Lv in FIG. 4) giving a pushing or pulling motion to the material. ) Occurs. For this reason, the welding speed varies, the welding defect is easily generated, and the bead shape is deteriorated. Further, it is extremely difficult to substantially prevent this backlash, and there has been no other way but to drive each conveyor at a constant speed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object to provide a transfer apparatus capable of mitigating backlash generated due to a difference in speed of a conveyor by a simple method. I do.

[0006]

According to the present invention, there is provided a transfer device in which two rows of chain conveyors are connected in a ladder shape with round bars.
A pipe is rotatably fitted around the outer periphery of each round bar. Further, the transfer device of the present invention is particularly suitable for work such as welding and fusing of a built-up longe, and in this case, a carry-in conveyor and a carry-out conveyor before and after an automatic machine for welding, fusing and the like of a built-up longe. Wherein the carry-in conveyor and the carry-out conveyor respectively connect two rows of chain conveyors in a ladder shape with round bars, and rotatably insert a pipe around the outer periphery of each round bar. . Further, when the conveyed object is a wide one such as a large plate, a plurality of the conveyers are arranged in parallel and driven synchronously.

In the transfer device of the present invention, since a pipe is rotatably inserted around the outer periphery of a round bar connected to a two-row chain conveyor in the form of a ladder, the transferred object is placed on a plurality of pipes. Transported. When a speed difference occurs between the equipment conveyors and backlash occurs, the pipes supporting the conveyed goods rotate around the round bar in the direction of the backlash, so that the conveyed goods slide in the same direction. , Alleviates the backlash force. For this reason, the conveyor speed in an automatic machine such as an assembling apparatus is always kept constant without being affected by the carry-in conveyor speed or the carry-out conveyor speed.

[0008]

FIG. 1 is a sectional side view of a transfer device according to the present invention, and FIG. 2 is a plan view. Here, the case of a built-up longe for shipbuilding is exemplified, but the concept including the arrangement of the conveyed articles and the facilities is not limited. As shown in these drawings, two parallel rows of chain conveyors 4 are installed, and each upper chain is adapted to move on a support frame 5. Each chain conveyor 4 is endlessly wound around a common drive wheel and driven wheel (not shown), and further provided with a chain tensioning device. The chain conveyors 4 in each row are round bars 6
To form a ladder connection. Reference numeral 7 denotes a support for supporting the end of the round bar 6, which is fixed to the chain conveyor 4 at predetermined intervals. The round bar 6 is fixed to the receiving table 7. further,
A pipe 8 is rotatably fitted around the outer periphery of each round bar 6.

The present transport device is configured as described above.
The carry-in conveyor 11 and the carry-out conveyor 12 shown in FIG. As shown in FIG. 1, the long material 1 to be transported is placed and transported on a plurality of pipes 8. The weight of the longe material 1 is transmitted from these pipes 8 to the round bar 6, the pedestal 7, and the support frame 5 of the upper chain on which the pedestal 7 is mounted, and is stably transmitted. And can be transported. When the long material 1 is carried into or out of the assembling apparatus 10 in FIG. 4, the conveyor load changes, so that the feed speed of the conveyor 13 of the assembling apparatus 10 and the feed speed of the carry-in conveyor 11 or There is a speed difference between the unloading conveyor 12 and the feed speed. Due to this speed difference, a backlash Lv that causes the long material 1 to move forward and backward is generated. At this time,
In the present transport device, all the pipes 8 on which the long material 1 is mounted rotate in the direction of the backlash about the respective round bars 6, so that the force of the backlash is applied to slide the long material 1 in that direction. Can be eased. Therefore, the feed speed of the conveyor 13 of the assembling apparatus 10 is not affected by the backlash force, so that a constant feed speed can be maintained at all times, and the welding speed is maintained constant. , Welding quality can be ensured.

When the conveyed object is a wide object such as a plate, as shown in FIG. 3, a plurality of the present conveyers are arranged in parallel and driven synchronously. FIG. 3 shows a plan view,
Reference numeral 1 denotes a conveyed object, and 14 denotes a main conveyance device. Reference numeral 15 denotes a drive motor whose power is transmitted via a gear mechanism 16 to a common drive shaft 1.
7 and the upper and lower main transport devices 14 and 14 in the figure.
Are driven synchronously. This transfer device exhibits the same operational effects as those described above by being connected to an automatic machine that performs fusing of a plate material and welding assembly for simultaneously welding a plurality of longitudinal materials on a large plate.

[0011]

As described above, according to the present invention, a pipe is rotatably fitted around the outer periphery of a round bar connected to a two-row chain conveyor in the form of a ladder. There is an effect that backlash based on a speed difference generated between conveyors can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional side view of a transfer device of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view showing another embodiment of the present invention.

FIG. 4 is an explanatory view of a conventional built-up longe assembly apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Longitude material 2 Face material 3 Web material 4 Chain conveyor 5 Support frame 6 Round bar 7 Receiving stand 8 Pipe 14 Conveying device 15 Drive motor 16 Gear mechanism 17 Drive shaft 18 Drive wheel

Claims (3)

[Claims] 1. A conveying device comprising two rows of chain conveyors connected in a ladder shape with round bars, and a pipe rotatably fitted around the outer periphery of each round bar. 2. A conveyor in which a carry-in conveyor and a carry-out conveyor are provided before and after an automatic machine for welding, fusing, etc. of a built-up longe. And a pipe is rotatably fitted around the outer circumference of each round bar. 3. A transport device comprising a plurality of transport devices according to claim 1 or 2 arranged in parallel and driven synchronously.