JPH0242598Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a device for protecting the end face of pipes such as steel pipes, namely a pipe end face protector formed to be attached to the end of the pipe to prevent the end face of the pipe from being damaged during transportation. It is related to.

Various types of tube end face protectors have been provided in the past, but all of them have major drawbacks.

That is, as shown in FIG. 1, a flange b is attached to one end surface of a short cylindrical body a that is open at both ends, a punching claw c for preventing the cylinder from falling out is protruded from the side surface of the cylindrical body a, and the cylindrical body a and the flange b are attached. There is a device in which a single cut is provided in the longitudinal direction through the tube, and a curved chevron-shaped piece d is abutted on the inside of the cut while straddling the cut, but the above-mentioned pipe end face protector has a narrow allowable range of expansion and contraction, making it difficult to apply. There were some imperfections. That is, in the case of the one shown in FIG. 1, the diameter of the cylindrical body a becomes larger due to the extension of the curved chevron piece d, and the cylindrical body a is attached to the steel pipe B.
The expansion/contraction rate is determined by the length of the curved chevron piece d, and when used for pipes with different inner diameters, it can only be used for tubes within the range of the expansion/contraction rate.
Large restrictions were placed on the types of pipes that could be applied, and the scope of application was extremely narrow, making it impractical.

The present invention aims to provide a tube end face protector that eliminates the above-mentioned drawbacks. A part of the pipe end of the shaped body is cut, the cut parts are overlapped with each other to form a telescopic part, and one end of each of the two link members is pivoted on a support frame that is fixed to the use side of the telescopic part. The other end of the link is crossed, a receiving member is provided below this intersection, a bolt is screwed into this, and the bolt is rotated to move the receiving member in the front and back direction to close the link member. The link is formed so that the outer diameter of the cylindrical body can be adjusted by opening and closing and moving the extensible part of the cylindrical body to the left and right, and the cylindrical body is inserted into the tube end and the flange is brought into contact with the tube end surface. After contact, the link member is actuated to press the outer surface of the cylindrical body to the inner surface of the tube, and the tube end surface is covered with a flange. It can be easily attached to a pipe and completely protects the end surface of the pipe.

Hereinafter, the present invention will be explained in detail based on examples.

FIG. 2 is a perspective view of the main parts of the pipe end protector A of the present invention. It is bent and a flange 2 is provided integrally, and the tube end 1a of the cylindrical body 1 is hung from the flange 2, and a part of it is cut.
These cut parts are stacked on top of each other and formed to be able to slide left and right to form a telescopic part 3. On both sides 3a and 3b of this telescopic part 3, support frames 4 and 5 are fixed in the axial direction, respectively. Support frames 4 and 5
One end of the link members 6, 7 is mounted on the pivot portion 8, 8,
The other ends are crossed, and this crossing part is pivotally connected by a pin 9, and the lower end of the pin 9 is fixed on a receiving member 10. A female thread (not shown) is formed inside the receiving member 10, into which a long rod bolt 11 is screwed and passed through. It is supported by a frame 12 placed horizontally.

When attaching the pipe end face protector A to the end face 13 of the steel pipe B, first rotate the long rod bolt 11 in the direction of the imaginary arrow (counterclockwise), and then
The receiving member 10 that can support the lower part of the intersection of No. 7 is a steel pipe B.
, the pivot parts 8, 8 of the link members 6, 7 are moved toward each other, and by this force, both ends 3a, 3b of the extensible part 3 are moved so as to overlap each other. After correcting the outer diameter of the cylindrical body 1 to a smaller value, the cylindrical body part 1 is inserted inside the steel pipe B, and the collar part 2 is brought into contact with the end surface 13 of the steel pipe B.

After that, while rotating the long rod bolt 11 clockwise as shown by the solid line arrow, the link member 6,
The receiving portion 10 of No. 7 is moved in the direction of the collar portion 2. When the receiving member 10 begins to move in the direction of the pivot parts 8, 8, a force is applied to the pivot parts 8, 8 of the link members 6, 7 to open them outward, and this force causes the cylindrical body to open. 1
Since both sides 3a and 3b of the extensible part 3 move away from each other, the outer diameter of the cylindrical body 1 gradually increases until the outside of the cylindrical body 1 comes into contact with the inner surface of the steel pipe B. It becomes immovable, and the end face 13 of the steel pipe B is covered by the collar part 2. In addition, the cylindrical body 1
When the telescoping parts 3 of
Move it while making contact with the inside of the

In addition, FIG. 3 is a rear view of the tube end face protector A of the present invention.
FIG. 4 shows the attached state.

As described above, according to the present invention, two link members are pivotally installed on both sides of the cut portion of the cylindrical body, and the outer diameter of the cylindrical body is adjusted by these link members. By setting the lengths of the link members 6 and 7 to appropriate lengths, the outer diameter of the cylindrical body can be adjusted over a wide range.

Further, a receiving member 10 is provided below the intersection of the link members, and a bolt 11 is screwed into the receiving member 10, and by rotating this bolt 11, the receiving member 10 is moved in the front and rear direction. The link members 6 and 7 are formed to open and close as shown in FIG. 2, and the outer diameter of the cylindrical body 1 is adjusted by operating the bolt 11. Since the tube end surface 13 can be completely covered with the back surface of the tube, damage to the tube can be completely prevented.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional pipe end face protector;
The figure is a front view showing the main parts of the proposed pipe end face protector, and FIG. 3 is a rear view showing the main parts of the proposed pipe end face protector.
FIG. 4 is a perspective view showing how the proposed pipe end face protector is attached. In the figure, A...pipe end face protector, B...steel pipe, 1...
...Cylindrical body, 2...Brim part, 3...Extensible part, 4, 5...
...Support frame, 6, 7...Link member, 8...
Pivot joint, 9...pin, 10...receiving member, 11...
…bolt.

Claims (1)

[Scope of utility model registration request] One end of the cylindrical body is bent outward to form a flange, a portion is cut from the flange to the tube end of the cylindrical body, and the cut parts are overlapped with each other to form a telescopic part, One end of each of the two link members is pivotally mounted on a support frame fixed on both sides of the telescopic part, the other ends are crossed, a receiving member is provided below this crossing part, and a bolt is screwed into this. The bolt is rotated to move the receiving member in the front and back directions to open and close the link member, and the extendable part of the link cylindrical body is moved left and right to adjust the outer diameter of the cylindrical body. After inserting the cylindrical body into the tube end and bringing the flange into contact with the tube end surface, actuating the link member to press and fix the outer surface of the cylindrical body to the tube inner surface,
A tube end surface protector formed to cover the tube end surface with a flange.