JPH024921Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention is a device that protects the end surface of pipes such as steel pipes, that is, a tool that is attached to the end surface of the pipe to prevent the end surface from being damaged during transportation. This relates to a pipe end face protector for

<Prior Art> Various types of pipe end face protectors have been provided in the past, one example of which is shown in Japanese Patent Publication No. 57-35017 filed by the present applicant. . This device has a flange on one end surface of a short cylindrical body with open ends, a punching claw protrudes from the side of the cylindrical body to prevent it from coming off, and a single cut is provided in the longitudinal direction through the cylindrical body and the flange. , a curved chevron-shaped piece is placed inside the same cut and straddles the cut.

<Problems to be Solved by the Invention> The pipe end face protector described in the above-mentioned Japanese Patent Publication No. 57-35017 had drawbacks such as a narrow allowable range of expansion and contraction and poor applicability. In other words, the diameter of the cylindrical body increases due to plastic deformation when a curved chevron is struck, and the diameter of the cylinder is brought into pressure contact with the steel pipe.The elongation rate is determined by the length of the curved chevron, and the inner diameter When used for different pipes, it can only be used for pipes within the elongation ratio range, which places great restrictions on the types of pipes that can be used. Since the pieces are struck with a hammer or the like to spread them out, the same effect cannot be obtained if the striking position is different, and the punching claws used to prevent them from falling off tend to bend and may fall off during use. It was hot.

<Means for solving the problems> In order to solve the above-mentioned problems, the present invention uses a bolt and a link mechanism. A bent flange is formed, a slit is provided from the flange to the other end of the cylindrical body, and both sides of the slit are overlapped over a required length to form an elastic part, and the cylindrical body is Gate-shaped supports are arranged and fixed in series on both sides of the expandable part on the inner wall, and guide rods are provided such that both ends thereof are inserted into the gate-shaped spaces of the two gate-type supports, and both ends of the guide rods are provided. A long hole is provided through each of the two link members, and one end of each of the two link members is pivotally connected to both ends of the support base and the guide rod, and the other end of each of the two link members is It is characterized by being pivotally attached to a holding member located on the flange side of the guide rod, and further having a long rod bolt screwed between the holding member and a receiving portion erected approximately at the center of the guide rod. This is a pipe end face protector.

<Embodiments and operations> The pipe end face protector of the present invention will be described in detail below with reference to drawings showing embodiments thereof.

FIG. 1 shows the main parts of the tube end face protector of the present invention. As shown in FIG. The body 1 is cut in the longitudinal direction at one point, and at the cut point, the required length is overlapped to form an elastic part 3.
It is said that Gate-shaped supports 4, 4 are connected and fixed on the inner peripheral wall of such a cylindrical body 1 on both sides of the extensible part 3, and elongated holes 5, 5 are provided at both ends between the gate-shaped supports 4, 4. A guide rod 6 having a guide rod 6 extending therethrough is installed so that both ends of the guide rod 6 are inserted under the gate-shaped support stands 4, 4. This guide rod 6 is not connected to the cylindrical body 1 or the gate-shaped support stands 4, 4 in any way. On the other hand, one end of each of the two link members 7, 7 is pivotally connected between the portal supports 4, 4 and the long holes 5, 5 at both ends of the guide rod 6, and the two link members 7, The other end of each of 7 is pivotally connected to a holding member 8. This holding member 8 is located closer to the flange 2 than the guide rod 6, and is not connected to the cylindrical body 1 in any way. A long rod bolt 10 is threadedly engaged with a receiving portion 9 provided in the housing.

In the tube end face protector constructed as described above, when the long rod bolt 10 is rotated by an appropriate means such as a power tool or manually, the holding member 8 moves in the directions of the arrows A and A' in FIG. However, in response to this, the link members 7, 7 open and close, and the gate-shaped supports 4, 4, to which one ends of each of the link members 7, 7 are pivotally connected, are fixed to the inner circumferential wall of the cylindrical body 1. Then, the cylindrical body 1 itself moves in the directions of arrows B and B', that is, the diameter of the cylindrical body 1 increases and decreases.

Therefore, when using the pipe end face protector of the present invention to protect the end face of a pipe such as a steel pipe, it is necessary to ensure that the protector of the present invention fully fits into the open end of the pipe 11 to be protected, as shown in FIG. The outer diameter of the cylindrical body 1 is reduced to a state where it is fit into one end of the tube 11 so that the flange 2 covers the end surface of the tube 11, and then the long rod bolt 1 is inserted into the end of the tube 11.
0 to open the link members 7, 7 and open the cylindrical body 1.
The diameter of the cylindrical body 1 is expanded and the outer peripheral surface of the cylindrical body 1 is crimped onto the inner surface of the tube 11 to be fixed.

In addition, when removing the protective device of the present invention from the pipe 11, the diameter of the cylindrical body 1 becomes smaller by rotating the long rod bolt 10 in the opposite direction to that during installation as described above, so that it can be easily removed. It is.

In addition, as shown in FIG. 3, on the outer peripheral wall of the cylindrical body 1,
For example, materials such as rubber or elastic plastic,
If the cushioning material/slip prevention piece 12 is installed, the pipe 1
This is more preferable because the inner surface of the tube 11 is not damaged, and the protective device of the present invention itself is difficult to separate due to the frictional resistance between the cushioning material and anti-slip piece 12 and the inner surface of the tube 11.

<Effects of the invention> As described above, according to the invention, when attaching to a pipe to be protected, such as a steel pipe, the protective device itself is inserted into the pipe and the long rod bolt is rotated using a power tool or manually. This is a simple operation, and the rotation of the long rod bolt presses the cylindrical body of the protector against the inner surface of the pipe with strong force, so it does not come off during transport.
The flange can reliably protect the end face of the tube.

More specifically, the pipe end face protector of the present invention has a guide rod whose both ends are inserted into the gate-shaped space of the gate-type support, and a link is provided through the elongated hole penetrated through both ends of the guide rod. Since the members are pivotally connected, the opening and closing of the link member is restricted in the longitudinal direction of the elongated hole, so the rotation of the elongated bolt facilitates the opening and closing of the link member without waste.

It should be noted that the protective equipment of this invention can of course be prepared in several different diameters depending on the diameter of the target pipe, but it can also be used for pipes with different diameters to some extent by adjusting the length of the link member. It is.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a main part of an embodiment of a tube end face protector according to the present invention, FIG. 2 is an explanatory diagram showing the same usage state, and FIG. 3 is an explanatory diagram of another embodiment of the same. In the figure, 1: cylindrical body, 2: flange, 4: portal support, 6: guide rod, 7: link member, 10: long rod bolt.

Claims (1)

[Scope of utility model registration request] One end of a cylindrical body with open ends is bent outward to form a flange, a cut is made across the flange to the other end of the cylindrical body, and both sides of the slit are cut to the required length. They are overlapped to form a telescopic part, and gate-shaped supports are connected and fixed on both sides of the telescopic part on the inner wall of the cylindrical body, and both ends thereof are inserted into the gate-shaped spaces of the two gate-shaped supports. A guide rod as shown in FIG. together with said 2
The other end of each of the link members is pivotally connected to a holding member located closer to the flange than the guide rod, and a long length is provided between the holding member and a receiving portion erected approximately at the center of the guide rod. A pipe end face protector characterized by threaded rod bolts.