JPS6218342Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used to cut and sample the end of a welded steel pipe such as an ERW steel pipe as a test piece material, and transport it to a testing machine or as a crop material to a predetermined location. The present invention relates to a suitable device.

In general, in the case of welded steel pipes such as ERW steel pipes, those that require high strength are individually tested for strength (flat test).
It is necessary to Therefore, conventionally welded steel pipe 1
The end of each tube is cut and sampled using an appropriate cutting machine, and then manually transported into a testing machine and tested to confirm pass/fail. However, as the diameter of welded steel pipes tends to increase, the task of transporting tube end materials to be used as test specimens into a testing machine is difficult and dangerous for workers. As a measure to eliminate such problems, as shown in Fig. 4, the pipe end material is held from the outer periphery, or as shown in Fig. 5, the pipe end material is expanded and held from the inside with an expansion and contraction rod installed at the tip of the insertion rod. A conveying device that does this is being considered. However, in both the former and latter cases, as the pipe size changes, the entire handling unit must be replaced each time to suit the changed pipe size, and if the handling unit has an adjustment mechanism, the opening of the claws and the expansion/contraction rod must be changed. The rod length has to be adjusted, the transportation equipment becomes expensive, and the preparation time is long, which impedes the operating efficiency of the cutting machine.

The present invention was made in order to eliminate the drawbacks of the above-mentioned prior art, and has a tube inner surface gripping claw and a tube outer surface gripping claw mounted on the tip of the arm, facing horizontally and facing each other vertically, to grip the tube inner surface. The claws and the pipe outer surface gripping claws are attached to cylinders so that they can be opened and closed, and the arms are held on the traveling frame via two systems of elevating devices, large and small, consisting of screws and cylinders, which allow the pipe size to be changed. This makes it easy to deal with any situation.

Examples will be described below with reference to the drawings. In Fig. 1, P is a steel pipe, cut along cutting line 1,
The pipe end material 2 is cut off. Reference numeral 3 indicates a gripping claw for the inner surface of the tube (hereinafter referred to as the lower claw), and reference numeral 4 indicates a claw for grasping the outer surface of the tube (hereinafter referred to as the upper claw), and the crop 2 is held and conveyed by these upper claws and the lower claw.

The lower claw 3 is L-shaped and pinned to links 6 and 7 pinned to the side plate 5 at its base. The link 7 is L-shaped, and one end thereof is pinned to an actuating rod 9 pinned to the tip of the rod of the cylinder 8. The actuation rod 9 is mounted within the arm 10.

The upper claw 4 has an inverted C-shape and is pinned to two links 11 and 12 pinned to the side plate 5.
Link 12 is pinned to the rod of cylinder 13 in the middle. The cylinder 13 is pivotally supported at the upper end of the arm 10.

The arm 10 has a cylindrical portion 14 at right angles thereto,
The top of the cylindrical portion 14 is provided with a female thread that is screwed into the threaded rod 15. 16 is a guide rod that guides the vertical movement of the arm 10. The threaded rod 15 is connected to a motor 17 at its top, and when the threaded rod rotates due to the rotation of the motor, the cylindrical portion 14 moves up and down. Then, since the arm 10 moves up and down, the position of the claw can be adjusted even if the tube diameter is different.

Reference numeral 18 denotes an outer cylinder through which the cylindrical portion 14 is slidably guided. A bracket 19 is fixed to the outside of the lower part of the outer cylinder 18, and the rod 21 of the cylinder 20 is pinned to this bracket. Therefore, when the rod 21 is expanded or contracted by the cylinder 20, the outer cylinder 18 moves up and down along the sliding member 22. This allows the gripping device to be retracted from the pass line PL (FIG. 3).

Reference numeral 23 denotes a gripping device carriage, which is movable along a rail 24 in the left-right direction in FIG. The movement is performed by a travel motor 25. The rotation of the travel motor 25 is controlled by a reduction gear 26, a pinion 27, and a rack 28.
is transmitted to move the carriage 23 left and right along the rail 24.

FIG. 3 shows an example of the relationship between the pipe end material conveying device and the pipe sawing machine according to the present invention, where 29 is a saw blade head;
The steel pipe P set on the pass line PL is cut by this. 30 is a rotary clamp device that grips and rotates the steel pipe P around its entire circumference.

With the above configuration, when cutting the pipe end material 2, the upper claw 4 and the lower claw 3 are loosely applied to the inner and outer surfaces of the steel pipe P as shown in FIG. The machine grips almost the entire circumference of the saw blade and rotates it, applying cutting feed to the rotating saw blade to cut the saw.
Once cut, the test piece 2 is completely gripped, the carriage 23 moves, the cylinder 20 is extended at a predetermined position, and the test piece 2 is lowered. When the cylinder 8 is extended, the lower claw 3 opens. At the same time, cylinder 1
3 opens the upper claw 4, so that the tube end material 2 can be transferred onto a conveyor (not shown) connected to a testing machine or the like.

When not collecting pipe ends, use cylinder 2.
0, the arm 10 is raised so as not to obstruct the passage of the steel pipe. When changing the position of the claws in response to changes in the steel pipe diameter, it is only necessary to make fine adjustments up and down using the screw mechanism, and the change in pipe diameter can be easily accommodated. In addition, the wall thickness of the pipe changes as the steel pipe diameter changes, but the extent of the change in wall thickness is, for example, even if the pipe diameter changes from 88.4 mm to 298.4 mm, the wall thickness is 2.1 mm ~
It is 15.9mm, which is sufficient to accommodate the opening range of both the inner and outer gripping claws.

As described above, according to the present invention, the inner and outer gripping claws of the steel pipe are provided at one end of a horizontal arm so as to be vertically opposed and can be opened and closed by a cylinder, and the arm has two types of large and small systems: a screw mechanism and a cylinder mechanism. Since it has an elevating mechanism, it can easily adapt to changes in pipe diameter and has almost no effect on the efficiency of cutting work.

Furthermore, by making it possible to move horizontally by means of a carriage, together with the above-mentioned structure of the claws, it became possible to efficiently convey the tube end material.

[Brief explanation of the drawing]

FIG. 1 shows a test piece conveying device according to the present invention. Figure 2 is also a side view. FIG. 3 shows an example of the arrangement of a test piece conveying device within a steel pipe cutting device. 4 and 5 are schematic explanatory diagrams of a conventional conveying device. In the figure: P...steel pipe to be cut, 1...cutting line, 2...test piece, 3...tube inner surface grasping claw (lower claw), 4...tube outer surface grasping claw (upper claw), 5...side plate ,
6, 7... Link, 8... Cylinder, 9... Operating rod, 10... Arm, 11, 12... Link, 1
3... Cylinder, 14... Cylindrical part, 15... Threaded rod, 16... Guide rod, 17... Motor, 18...
... Outer cylinder, 19 ... Bracket, 20 ... Cylinder, 21 ... Rod, 22 ... Sliding member, 23 ...
... (grasping device) carriage, 24 ... rail, 2
5...Travel motor, 26...Reduction device, 27...
Pinion, 28...Rack, 29...Saw blade head.

Claims (1)

[Scope of utility model registration request] A cylinder 8 is provided with a tube inner surface gripping claw 3 and a tube outer surface gripping claw 4 of the steel pipe P vertically opposed to each other at one end of a horizontal arm 10, and the tube inner surface gripping claw 3 is passed through the arm 10 and attached to the end of the arm. The tube outer surface grasping pawl 4 is configured to be opened and closed by a pin connected to an operating rod 9 connected to the arm 10, and the tube outer surface gripping claw 4 is configured to be opened and closed by a cylinder 13 attached to the top of the tip of an arm 10. Sliding member 2 provided in 23
The outer cylinder 18 is provided with an integral cylindrical part 14 that is raised and lowered by a screw mechanism by fitting into an outer cylinder 18 which is vertically movable along the pass line 24. 1. A pipe end material conveying device for a steel pipe cutting machine, characterized in that the device is supported so as to be movable up and down via a cylinder 20 attached to a carriage 23 for moving the pipe.