JPH051089B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a conveying roller of a pipe manufacturing apparatus that conveys a tube and a mandrel whose end portion protrudes outside the tube by penetrating the tube in contact with the tube when the product is manufactured. It is something.

The conventional conveyance rollers are explained with reference to FIGS. 1 to 4. 1 is a mandrel bar, 2 is a tube that becomes a product (hereinafter referred to as a cell), 3 is a large number of conveyance rollers driven by a motor M, and 1. , 4 in Figure 2
8 is the rolling mill, 8 is the roller row on the exit side of the rolling mill 4, 5 is the rotation direction of each conveying roller 3 of the roller row 8, 7 is the stopper in FIGS. 3 and 4, and 9 is the roller row of the aligning line. , 6 are the rotational directions of the conveying rollers 3 of the same roller row 9, and the mandrel bar 1 and cell 2 coming out from the exit side of the rolling mill 4 are conveyed by the conveying rollers 3 rotating in the direction of the arrow 5 of the roller row 8. while gradually slowing down each conveyance roller 3 and moving the cell 2.
When the end c of the rolling mill 4 has moved by a distance Conveyance roller 3
(The transport rollers 3 are constantly rotating in the direction of arrow 6) and transport the mandrel bar 1 and the cell 2 in the direction of the stopper 7, and the end of the mandrel bar 1 is placed on the stopper 7. The mandrel bar 1 and the cell 2 are brought into contact, and the mandrel bar 1 and the cell 2 are stopped and their positions are determined.

Each conveyance roller 3 of the roller row 9 of the aligning line is constantly rotating in the direction of the arrow 6, and the end of the mandrel bar 1 is brought into contact with the stopper 7.
When the mandrel bar 1 and the cell 2 are stopped, the transport roller 3 and the cell 2 slip, causing seizure and causing defects in the cell 2 that will become the product.

The present invention addresses the above-mentioned problems, and is a transportation system for a pipe manufacturing apparatus that transports a pipe to be a product and a mandrel bar that penetrates the pipe and has an end protruding outside the pipe while being in contact with the pipe. A conveying roller of a pipe making apparatus, characterized in that, in the roller, a roller in a range that contacts the end of the tube when the mandrel bar and the tube are conveyed to a predetermined position and stopped is a non-driving roll. The purpose of this is to prevent damage to the tube that would occur when the mandrel bar and tube move to a predetermined position and the mandrel bar and tube stop. Another object of the present invention is to provide an improved conveying roller for a pipe-making device that can simplify the structure of the device by eliminating the need for a roller drive device and a control device for the rollers in the range that contacts the ends of the tube.

Next, the conveying roller of the pipe manufacturing apparatus of the present invention will be explained with reference to an embodiment shown in FIGS. In FIGS. 5 and 6, 4 is a rolling mill, 8 is a row of rollers on the exit side of the rolling mill 4, 5 is a rotation direction of each transport roller 3 of the roller row 8, and 7th and 8th 7 in the figure is a stopper, 9 is a roller row of the aligning line, 6 is the rotation direction of each conveyance roller 3 of the same roller row 9, 3' in FIGS. 5 to 8 is a non-driving roller (idler roller), 10 in FIG. 6 is a roller row of non-driving rollers 3' in the roller row 8, 11 in FIG. 7 is a roller row of non-driving rollers 3' in the roller row 9,
x is the distance from the exit side of rolling mill 4 to the end of cell 2 when mandrel bar 1 and cell 2 are stopped, l
is the distance from the rear end of the mandrel bar 1 before aligning to the stopper 7 of the aligning line,
These correspond to the amount of aligning. Also z
is the distance from the end of the cell 2 to the stopper 7 when the mandrel bar 1 is brought into contact with the stopper 7, and this corresponds to the amount of protrusion of the mandrel bar 1 from the cell 2. Also, the rollers 3' that are not driven on the exit side of the rolling mill 4 are the rollers 3' in the range x and the roller 3' one position ahead of the rollers 3', as is clear from the roller row 10. Also, the rollers 3' that are not driven during alignment are the rollers 3' and 1 that are in the range excluding z from the stopper 7 (z+l), as is clear from the roller row 11.
and roller 3' in front.

Next, the function of the conveyance rollers of the pipe manufacturing apparatus will be explained. The mandrel bar 1 and the cell 2 are conveyed by the conveyance roller 3 of the roller row 8 from the exit side of the rolling mill 4, and the end c of the cell 2 moves a distance x from the rolling mill 4, and the conveying roller 3 decelerates and stops. do. At this time, if all the conveyance rollers are driven conveyance rollers 3 driven by the motor M as in the conventional case, the drive conveyance roller 3 in the range x through which the end c of the cell 2 passes, (Slip+high surface pressure) acts on the conveying roller 3, causing seizure between the driving conveying roller 3 and the cell 2, and causing a flaw on the cell 2. However, in this proposal, the conveyance roller 3' of the roller row 10 is a non-driving roller (idler roller), and when the mandrel bar 1 and the cell 2 decelerate and stop, the non-driving roller 3' is subjected to a high load. It rotates following the movement of the cell 2 end, and there is almost no slippage between the cell 2 and the non-driving roller 3'.
Seizure between the cell 2 and the non-driving roller 3' is prevented, and the cell 2 used as a product is not damaged. Similarly, in the aligning line, the rollers in the roller row 11 that experience high surface pressure are made into non-driving rollers (idler rollers) 3', which prevents seizure between the cells 2 and the rollers 3'. The cell 2 that becomes the product is not damaged.

The present invention provides a transport roller of a pipe manufacturing apparatus that transports a pipe to be a product and a mandrel bar that passes through the pipe and has an end protruding outside the pipe in contact with the pipe, as described above. When the mandrel bar and the cell are conveyed to a predetermined position and stopped, the roller in the range that contacts the end of the tube is a non-driving roller, and when the mandrel bar and the cell are moved to a predetermined position and stopped. Since the non-driving roller rotates following the movement of the tube, slippage between the tube and the non-driving roller can be almost completely eliminated, and damage to the tube can be prevented. Furthermore, the rollers in the range that contacts the end of the tube are not controlled or driven, and a roller drive device or control device can be dispensed with for the rollers in this range, which has the effect of simplifying the structure of the device.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional side view showing a conventional rolling mill exit side conveyance roller along the arrow line in Fig. 2, Fig. 2 is a plan view thereof, and Fig. 3 is a conventional alignment line conveyance roller. 4 is a plan view showing the 3rd
FIG. 5 is a longitudinal side view taken along the line shown in FIG. 6, and FIG. 5 is a side view taken along the line shown in FIG. , FIG. 6 is a plan view thereof, FIG. 7 is a plan view showing an embodiment of the conveying roller of the aligning line of the pipe manufacturing apparatus of the present invention, and FIG. 8 is a view taken in the direction of the arrow in FIG.
FIG. 1... Mandrel bar, 2... Tube that becomes the product,
3... Conveyance roller driven by motor M,
3'...Non-driven roller, c...End of tube 2.

Claims (1)

[Claims] 1. In a conveying roller of a pipe manufacturing device that conveys a pipe to be a product and a mandrel bar that penetrates the pipe and has an end protruding outside the pipe in contact with the pipe, the mandrel bar and the pipe are arranged in a predetermined position. 1. A conveying roller for a pipe making apparatus, characterized in that the rollers in the range that contact the end of the pipe when the pipe is transported to a position and stopped are non-driving rollers.