JPS633681Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shell stopper, and more particularly, to a shell stopper used when pulling out a hole-drilling bar from a shell having holes formed in a billet for manufacturing seamless steel pipes.

A conventional shell stopper has a horseshoe-shaped notch formed on one side of a block made of steel or the like to match the pipe diameter of the shell, and the shell stopper is placed at the end of the shell obtained by drilling a hole in the billet. The bar inserted into the hole in the shell is being pulled out.

However, since the shell stoppers are placed using a crane or the like, it takes time and effort to accurately position them, and since there are many different standards for shell diameters, lengths, etc., it is necessary to replace the shell stoppers or change their positions each time. This was a laborious and laborious task, and the work efficiency was low.

The purpose of the present invention is to eliminate the problems of the conventional shell stopper, and to provide a shell stopper that is easy to replace and saves labor. Alternatively, the shell stopper is characterized in that two or more notches are provided in a plate, and the plate is movably and positionably attached to a frame so that the center of each hole can be aligned with the axis of the shell. .

Embodiments of the present invention will be described below based on the drawings.

An appropriate number of holes 2 are bored in the disk 1 so that the centers of the holes 2 having the required diameters from small to large are located on a concentric circumference centered on the center of the disk 1, A shaft 3 is fixed to the center of the disk 1, and the shaft 3 is rotatably supported by a frame 4.
It can be rotated by a pinion 6 that meshes with teeth 5 provided on the outer periphery of the pinion and is rotated by a drive device.

Furthermore, the axial center of the shell supported by the pass line is always located on the concentric circumference of the disk 1 even when the shell diameters are different, and the center of each hole 2 is aligned with the axial center of the shell. Each hole 2 is provided with a tapered hole 10 that can be fitted with a stopper pin 9 provided at the tip of the piston rod 8 of the cylinder 7 attached to the frame 4 when the piston rod 8 is in the position shown in FIG. be. In addition,
In this embodiment, as described later, when several rows are placed in the longitudinal direction for shells of a certain length, the shells will pass through if the plate is not stopped, and there will be a U-shaped notch for kicking out the shells after removing the bar. 11 is provided on the disc 1.

To pull out the bar from the shell, select a hole 2 that is supported on the pass line and through which the shell cannot pass, and when the pinion 6 is rotated by the drive device, the disc 1 rotates and the center of the selected hole 2 is aligned with the hole 2. At a position that coincides with the axial center of the shell, the piston rod 8 of the cylinder 7 is extended, and the stopper pin 9 provided at the tip of the piston rod 8 is fitted into the tapered hole 10 provided in the disc 1, and the rotation of the disc 1 is stopped. , positioned, and fixed.

Shell stopper hole 2 suitable for shell in this way
By positioning and fixing the shell, when the bar is pulled out, the shell hits the disk and is prevented from moving, allowing the bar to be pulled out. Of course, some mechanical error is allowed in these positioning operations.

In the above embodiment, holes 2 of various diameters are provided in the disk 1, but holes 2 of various diameters may be arranged in a rectangular plate, or holes 2 of various sizes are provided in a rectangular plate. A U-shaped cutout may be provided so as to be slidable so that a hole matching the inner diameter of the shell can be easily selected and moved. In this case as well, it is possible to facilitate positioning using a stopper pin and a tapered hole.

It should be noted that the shell stopper of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes may be made without departing from the gist of the present invention.

As described above, according to the shell stopper of the present invention, a large number of holes of various diameters or U-shaped notches are arranged on the rotating disk or slide plate, and the stopper hole that matches the inner diameter of the shell can be easily selected and moved. As a result, the cumbersome shell stopper replacement and positioning work, which was conventionally done using a crane, can be done quickly, reliably, and easily without using a crane, and work efficiency can be improved. can.

Furthermore, by arranging an appropriate number of shell stoppers of the present invention equipped with a stopper mechanism in the longitudinal direction of the shell according to the length of the shell, it is possible to easily form a desired stopper hole according to the length and diameter of the shell. It becomes possible to select and use the bar, and it is also possible to completely automate the work of pulling out the bar from the shell.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the present invention, and FIG. 2 is an explanatory diagram of the stopper mechanism used in the present invention. In the figure, 1 is a disk, 2 is a hole, 4 is a frame, 6 is a pinion, 9 is a stopper pin, and 10 is a tapered hole.

Claims (1)

[Scope of utility model registration request] Two or more holes or notches of various diameters are provided in the plate through which bars for drilling the shell can pass, and the plate can be moved and positioned on the frame so that the center of each hole can be aligned with the axis of the shell. A shell stopper characterized by being attached.