JPH063818Y2 - Pipe end face protector - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a tool for protecting an end surface of a pipe including a steel pipe,
That is, the present invention relates to a pipe end face protector to be attached to a pipe end face for use in order to prevent the end face of the pipe from being damaged during transportation.

<Prior Art> Various types of tube end face protectors have been conventionally provided, and an example thereof is disclosed in Japanese Utility Model Laid-Open No. 51-53513.

In this device, locking parts having engaging parts are provided opposite to each other in a notch part of an annular body having a bent part bent outward, and locking metal parts made up of bolts and nuts are interposed between the locking parts. It is as if it was freely installed.

The one disclosed in Japanese Utility Model Publication No. 51-26334 has a structure in which both screw rods screwed into locking metal fittings at both ends of the cutout portion of the protective metal fitting are driven between the rising pieces.

<Problems to be solved by the invention> The expansion / contraction mechanism disclosed in Japanese Utility Model Laid-Open No. 51-53513 and Japanese Utility Model Publication No. 51-26334 has bolts, between the engaging portions at both ends of the notch of the tubular body, It is provided with a locking metal fitting made of a nut and both screw threads, and when expanding the diameter of the pipe end face protector,
The locking metal fitting and both screw rods are rotated to expand the diameter. In this case, as the diameter increases, the distance between the respective locking parts increases, and the expansion is maintained accordingly. The length of the locking metal fitting for this is increased.

In other words, by increasing the length of the metal fittings between the above-mentioned locking parts, it becomes weak against impact from the lateral direction, and at the time of transporting and loading the pipe, both ends of the pipe are fitted with hangers or the like. Since it is lifted up, it may be easily destroyed by the claws on the hangers.

<Means for Solving Problems> In order to solve the above problems, the present invention is configured to expand the diameter by reducing the distance between the engaging portions by a required means. Is a tubular body that is open at both ends and has one end bent outward to form a flange, and a notch is provided from the collar to the other end of the tubular body, and both ends of the notch have the required length. Over and over to form a stretchable portion, and the tip of the inner inner peripheral wall of the stretchable portion is bent inward at a substantially right angle to form a locking portion, and a predetermined width is formed on the inner inner circumferential wall surface in front of the locking portion. The opening is formed by notching the tip of the outer inner peripheral wall of the expandable portion or a length longer than that, and a locking portion that is bent inward at a substantially right angle through the opening is formed at the tip of the outer inner peripheral wall. , The bolts and nuts for freely adjusting the distance between the opposing locking parts Note that the pipe end face protector is characterized in that the pipe end face protector is mounted through the bolt insertion holes formed in the respective locking portions.

<Embodiment and Action> The pipe end face protector of the present invention will be described below in detail with reference to the drawings showing the embodiment.

FIG. 1 shows a main part of a pipe end face protector of the present invention. As shown in FIG. 1, a flange (2) is attached to one end of a short tubular body (1) having openings at both ends. The tubular body (1) is cut in a longitudinal direction at a certain position, and the cut portion is overlapped with a required length to form a stretchable portion (3). Such a tubular body
On the inner peripheral wall of (1), the tip of the inner inner peripheral wall (4) of the expansion / contraction part (3) is bent inward at a substantially right angle to form a locking part (5), and the same locking (5) front side An opening with a required width on the inner peripheral wall (4) surface of
(6) is extended to the rear, and a cutout is formed to the outer inner peripheral wall (7) tip of the expansion / contraction part (3) or to a length longer than that. And, at the tip of the outer peripheral wall (7), there is provided a locking portion (5 ') which is bent inward through the opening (6) at a substantially right angle, and
The locking portions (5), (5 ') are provided so as to provide a fastening metal fitting (8) such as a bolt and a nut between the locking portions (5), (5') facing each other.
Bolt insertion holes (9) and (9 ') are drilled in the surface, and the distance between the locking portions (5) and (5') can be freely adjusted by the tightening metal fitting (8). is there.

In the pipe end surface protector having the above-described structure, as shown in FIG. 2, when the fastening metal fitting (8) is rotated by an appropriate means such as an electric tool or manual operation, the engaging portion is accordingly rotated.
(5) and (5 ') move in the direction of arrows A and A'in the figure,
On the contrary, the tips of the inner inner peripheral wall (4) and the outer inner peripheral wall (7) of the expansion / contraction part (3) move in the directions of arrows B and B ′ in the figure, and the diameter of the cylindrical body (1) itself. Will be expanded. If the tightening metal fitting (8) is loosened in the opposite direction, the engaging parts (5), (5 ')
The distance between them becomes large, and on the contrary, the diameter of the tubular body (1) itself is reduced, and the diameter of the tubular body (1) is reduced by the rotation of the fastening metal fitting (8). The diameter expansion and diameter reduction can be adjusted freely.

Therefore, when protecting the end face of a pipe such as a steel pipe using the pipe end face protector of the present invention, the pipe to be protected (10) as shown in FIG.
Insert the tubular body (1) into one end of the tube (10) with the outer diameter of the tubular body (1) reduced until the protective device of the present invention is fully fitted into the open end of By covering the end surface of the pipe (10) and then rotating the fastening metal fitting (8) to reduce the distance between the locking portions (5) and (5 '), the tubular body (1) Expand the diameter of the pipe
(10) The outer peripheral surface of the cylindrical body (1) is fixed to the inner surface by crimping.

When removing the protector of the present invention from the pipe (10), rotate the fastening metal fitting (8) in the direction opposite to the above-mentioned mounting,
Since the diameter of the cylindrical body (1) is small, it can be easily removed.

As shown in FIG. 4, if a cushioning material / slip prevention piece (11) made of, for example, rubber or elastic plastic is attached to the outer peripheral wall of the tubular body (1), the pipe ( The inner surface of 10) is not scratched, and the frictional resistance between the cushioning material / anti-slip piece (11) and the inner surface of the pipe (10) makes it difficult for the protective equipment of the present invention to come off. Is.

<Effects of the Invention> As described above, according to the present invention, when attaching to a pipe to be protected such as a steel pipe, the protector itself is fitted into the pipe, and the tightening metal fitting is manually rotated. With the turning of the tightening metal fitting, the tubular body of the protector is pressed against the inner surface of the pipe with a strong force by the rotation of the tightening fitting, and the distance between the locking parts is reduced as the diameter increases. Therefore, it is possible to sufficiently deal with an impact or a damage caused by an instrument such as a hanger when the pipe is loaded. In other words, the tension between the locking parts is always applied to each other, and the length is reduced as the diameter increases.
It will be tough.

As the protector of the present invention, it is needless to say that several kinds of protectors are prepared according to the diameter of the target pipe, but the protector can also be used for pipes having a different diameter to some extent by adjusting the tightening fitting.

[Brief description of drawings]

1 and 2 are main part explanatory views of an embodiment of a pipe end face protector according to the present invention, FIG. 3 is an explanatory view showing the same usage state, and FIG. 4 is an explanatory view of the other embodiment. Is. In the figure, (1): Cylindrical body (2): Collar part (5), (5 '): Locking part (6): Opening part (8): Tightening fitting

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. One end of a tubular body having openings at both ends is bent outward to form a collar portion, and a notch is provided from the collar portion to the other end of the tubular body, and both sides of the notch portion are provided. To form a stretchable portion by stacking over a required length, and the tip of the inner inner circumferential wall of the stretchable portion is bent inward at a substantially right angle to form a locking portion, and the inner circumferential wall surface in front of the locking portion is formed. An opening having a required width is formed in the distal end of the outer inner peripheral wall of the expandable portion or a notch longer than that, and the end of the outer inner peripheral wall is passed through the opening and is bent at a substantially right angle inward. And a tightening metal fitting composed of a bolt and a nut for freely adjusting the distance between the respective opposed locking portions is formed through the bolt insertion holes formed in the respective locking portions. A pipe end face protector characterized by being attached.