JPH0242599Y2 - - 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 of this type 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, and punching claws c are protruded from the side surface of the cylindrical body a to prevent it from coming off, and the cylindrical body a and the flange b are There is a device in which a single cut is provided in the longitudinal direction through the tube, and a curved chevron piece d is abutted on the inside of the cut while straddling the cut.However, the above-mentioned pipe end face protector has a narrow allowable range of expansion and contraction. The drawback was that it lacked practical application. That is, in the case of the one shown in FIG. 1, the diameter of the cylindrical body a becomes larger due to the elongation of the curved angled piece d, and the diameter of the cylindrical body a becomes larger when attached to the steel pipe B. The expansion/contraction ratio is determined, and when used for steel pipes with different inner diameters, it can only be used for steel pipes within that expansion/contraction ratio, so there are major restrictions on the type of pipe to which it can be applied, and the range of application is very narrow. It lacked practicality.

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 cylindrical body is cut, and the cut parts are overlapped with each other to form a telescopic part.A bracket is fixed to one side of this telescopic part, and a bracket is fixed to the other side to extend in the axial direction. A frame supporting the screw rod is fixed, a link member is interposed between the bracket and the screw rod, one of the link members is pivotally mounted on the bracket, and a guide pin is erected and fixed to the other, The guide pin is screwed into the threaded rod, and the threaded rod is rotated to cause the link member to extend and contract, and at the same time, the expandable portion of the cylindrical body is expanded and contracted to adjust the outer diameter of the cylindrical body. This is a tube end surface protector formed by inserting the cylindrical body into the tube end and covering the tube end surface with the flange. is completely protected.

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 face protector A of the present invention. It is bent to provide a flange 2 integrally, and a part thereof is cut from the flange 2 to the tube end 1a of the cylindrical body 1.
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. A bracket 4 bent in a stepwise manner is fixed on one side 3a of the telescopic part 3, and a bracket 4 bent in a stepwise manner is fixed on the opposite side 3b. An L-shaped frame 5 whose end surface 5a is bent in the circumferential direction is fixed in the axial direction, and the end surface 5a is bent in the circumferential direction.
A long screw rod 6 in the axial direction is rotatably attached to a, and a link member 7 is interposed between the screw rod 6 and the bracket 4, and one side of the link member 7 is pivotally connected to the bracket 4. (pivot mounting 8), and on the opposite side, a guide pin 9 with a female thread (not shown) is provided upright, and the threaded rod 6 described above is screwed through the female screw hole of this guide pin 9. There is.

The pipe end face protector A of the present invention is constructed as described above, and when the pipe end face protector A is attached to the pipe end face 10 of the steel pipe B, the threaded rod 6 to be mounted approximately parallel to the frame 5 is aligned with the virtual arrow. As shown in Figure 1, when the guide pin 9 is moved in the direction of the imaginary line by rotating counterclockwise and the link member 7 is pulled in the direction of the threaded rod 6, the bracket 4 is also pulled in the same direction. 3a and 3b overlap deeply with each other, thereby reducing the outer diameter of the cylindrical body 1.
If the outer diameter of the cylindrical body 1 is smaller than the inner diameter of the steel pipe B, insert the cylindrical body 1 inside the steel pipe B in that state, and after abutting the back surface of the collar 2 against the pipe end surface 10, When the screw rod 6 is rotated clockwise (in the direction shown by the solid line arrow) and the guide pin 9 that is screwed into the screw rod 6 is moved toward the front (in the direction of the solid line arrow), the link member 7 tries to extend in the circumferential direction. Push the bracket 4 outward. Therefore, if the screw rod 6 is rotated clockwise as it is, both sides 3a and 3b of the telescopic portion 3
are separated from each other, increasing the outer diameter of the cylindrical body 1, and finally pressed against the inside of the steel pipe B. If the operation of the screw rod 6 is stopped in this state, the back surface of the collar portion 2 is completely covered with the end surface 10 of the steel pipe B, thereby protecting the end surface.

When removing pipe end protector A from steel pipe B,
Rotate the screw rod 6 counterclockwise and move the guide pin 9 screwed into the screw rod 6 to remove the link member 7.
, squeeze the outer diameter of the cylindrical body 1, and pull it out.

Incidentally, FIG. 3 shows the installed state of the tube end face protector A of the present invention.

As described above, according to the present invention, the outer diameter of the cylindrical body 1 of the tube end face protector A can be freely adjusted by extending and contracting the single link member 7 using the threaded rod 6. Because of this, it can be attached to small to large diameter pipes as needed to completely protect the pipe end face, and its simple structure makes it easy to assemble and has low manufacturing costs. It is most suitable for actual use.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional pipe end face protector;
The figure is a perspective view showing the main parts of the main pipe end face protector, and FIG. 3 is an explanatory view showing the attached state of the main pipe end face protector. In the figure, A...pipe end face protector, B...steel pipe, 1...
...Cylindrical body, 2...Flame, 3...Extensible part, 4...Bracket, 5...Frame, 6...Screw rod, 7...
... Link member, 9 ... Guide pin, 10 ... Pipe end surface.

Claims (1)

[Scope of utility model registration request] One end of the cylindrical body is bent outward to form a flange, a part of the flange is cut from the flange to the tube end of the cylindrical body, and the cut parts are overlapped with each other to form an elastic part. A bracket is fixed to one side of the extensible part, a frame supporting a screw rod extending in the axial direction is fixed to the opposite side, a link member is interposed between the bracket and the screw rod, and the link member one side is pivotally mounted on the bracket, a guide pin is erected and fixed on the other side, the guide pin is screwed into the threaded rod, and the threaded rod is rotated to cause the link member to extend and contract, and at the same time to form a cylindrical shape. The outer diameter of the cylindrical body is adjusted by expanding and contracting the extensible part of the body, and the cylindrical body is inserted into the end of the tube, and the end surface of the tube is covered by the collar. Pipe end protector.