JP2023020533A - Pipe body tip protection cover - Google Patents

Abstract

To provide a pipe tip protection cover for protecting an opening part of a pipe body which can be easily attached and detached to/from a tip part of the pipe body, and can be rigidly attached thereto.SOLUTION: A pipe body tip protection cover which can block an opening part of piping 1, and can cover a front face, a side face and a back face of a flange part 2 comprises: a main body part 4 composed of a circular film; a double-folded cloth 5 sewed to an edge of the main body part; and a rubber string 6 accommodated in the cloth. Then, when setting a diameter of the main body part 4 at deployment as L1, a diameter and a thickness of the flange part 2 as R1 and D1, a diameter of the piping 1 as r1, and an entire length of the rubber string 6 in a fully-elongated state and a shrunk state as M1 and N1, relationships of L1≒D1×4+R1, M1≒R1×π×1.5 and N1≒r1×π are established. At this time π is a circumferential rate.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe body tip protection cover for protecting pipe tip ends of pipes and various mechanical devices installed in factories and buildings.

When performing maintenance or cleaning of pipes during periodic inspections at factories, the pipes are cut off at the flanges that are placed here and there. Otherwise, rainwater, dust, dirt, etc., or birds and small animals may enter through the opening. , the vinyl sheet temporarily fixed at the start of work was removed.
In addition, Patent Document 1 (Japanese Patent Application Laid-Open No. 9-126386) discloses a pipe end cap that covers the pipe end of a pipe material having a square cross section installed in various buildings (particularly, paragraph 0016 and FIG. 1), and Patent Document 2 (Japanese Utility Model Laid-Open No. 61-73893) discloses a tube that covers the outer periphery of the open end of a pipe (especially, see claim 1 and FIGS. 1 to 3). 3 (Utility Model Registration No. 3046114) discloses a safety cap capable of protecting the tip of four different sizes of reinforcing bars or steel pipes (see in particular paragraph 0008 and FIG. 5).

However, the method of covering the opening with a vinyl sheet and temporarily fixing it with gum tape or the like has the problem of poor work efficiency because it takes time to attach and detach the vinyl sheet. The cap, the tube described in Patent Document 2, and the safety cap described in Patent Document 3 are all fixedly attached to the distal end of the tubular body and cannot be easily attached and detached.

JP-A-9-126386 Japanese Utility Model Laid-Open No. 61-73893 Utility Model Registration No. 3046114

The first object of the present invention is to solve the above-mentioned problems and to make it possible to easily attach and detach a tube tip protection cover for protecting the opening of the tube to and from the tip of the tube. The second problem is to make it possible to firmly attach the tubular body tip protection cover to the tip part of the tubular body.

The invention according to claim 1 is a tubular body tip protection cover for protecting the tip part of a tubular body having a large diameter part at the tip part,
a circular main body formed of a flexible sheet member;
Having an annular elastic body attached to the periphery of the main body,
The diameter of the main body portion when deployed is equal to or greater than the sum of twice the thickness of the large diameter portion and the maximum diameter of the large diameter portion,
The annular elastic body is characterized in that its full length in a fully extended state is longer than the maximum perimeter of the large diameter portion, and its full length in a contracted state is shorter than the maximum perimeter of the large diameter portion.

According to a second aspect of the present invention, there is provided a tubular body tip protective cover according to the first aspect, wherein a string longer than the circumferential length of the main body when deployed is provided along the annular elastic body. It is characterized by

The invention according to claim 3 is a tubular body tip protection cover for protecting the tip part of a tubular body having a large diameter part at the tip part,
a bag-like main body formed of a flexible sheet member and having one opening;
Having an annular elastic body attached around the opening,
the depth of the body portion is greater than the thickness of the large diameter portion;
the perimeter of the opening is longer than the maximum perimeter of the large-diameter portion;
The annular elastic body is characterized in that its full length in a fully extended state is longer than the maximum perimeter of the large diameter portion, and its full length in a contracted state is shorter than the maximum perimeter of the large diameter portion.

According to a fourth aspect of the invention, there is provided a tubular tip protective cover according to the third aspect, wherein the full length of the annular elastic body in a contracted state is shorter than the minimum peripheral length of the tubular body. Characterized by

According to the pipe tip protection cover of the first aspect of the invention, the diameter of the main body when deployed is equal to or greater than the sum of twice the thickness of the large diameter portion and the maximum diameter of the large diameter portion, and the annular elastic body is longer than the maximum circumference of the large-diameter portion when fully extended, and shorter than the maximum circumference of the large-diameter portion when contracted. The distal end side and the lateral side of the portion can be covered, and then the distal end of the tubular body can be held in a protected state by releasing the extension force applied to the annular elastic body. The cover can be easily attached to and detached from the distal end portion of the tubular body.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, a string longer than the circumference of the main body when deployed is provided along the annular elastic body. Even if the diameter is large, the tube tip protection cover can be firmly attached to the tip of the tube.

According to the pipe tip protection cover of the invention according to claim 3, the depth of the main body is greater than the thickness of the large diameter portion, the perimeter of the opening is longer than the maximum perimeter of the large diameter portion, and the annular elastic body is The total length in the fully extended state is longer than the maximum circumference of the large diameter portion, and the total length in the contracted state is shorter than the maximum circumference of the large diameter portion. After that, by releasing the extension force applied to the annular elastic body, the tip of the tube can be held in a protected state, so the tube tip protection cover can be easily attached to and detached from the distal end of the tubular body.

According to the invention of claim 4, in addition to the effects of the invention of claim 3, since the full length of the annular elastic body in a shrunk state is shorter than the minimum circumferential length of the tube, the protective cover for protecting the tip of the tube is attached to the tube. It can be fixed around narrow parts of the body.

Sectional drawing of the state which covered piping with a flange and the same piping with the pipe tip protection cover. FIG. 5 is a diagram showing a part of the manufacturing process of the tubular body tip protection cover according to the first embodiment; FIG. 5 is an explanatory view until the tubular body tip protection cover according to the first embodiment is completed; The figure which shows the state which covered the pipe with a joint, and the same pipe with the pipe tip protection cover. FIG. 10 is a diagram showing a manufacturing process of the tubular body tip protection cover according to the second embodiment;

The embodiments of the present invention will now be described with reference to examples.

FIG. 1(A) is a cross-sectional view of a pipe 1 with a flange. A pipe 1 has a flange portion 2 at its tip, and the flange portion 2 is provided with bolt holes 3 for fixing the flange portions of the two pipes to each other. Then, the diameter (minimum diameter) of the intermediate portion of the pipe 1 is r1 (mm), the diameter (maximum diameter) of the flange portion 2 is R1 (mm), and the thickness (maximum thickness) of the flange portion 2 is D1 (mm). do.
FIG. 1(B) is a cross-sectional view of the flanged pipe 1 of FIG. It closes the opening and covers the front, side and rear surfaces of the flange portion 2 . When the rubber cord 6 contained inside the cloth 5 sewn to the edge of the main body 4 shrinks, the edge of the tube tip protection cover shrinks on the rear surface side of the flange 2, so that the main body 4 is held in the state of FIG. 1(B).
When removing the tube tip protection cover from the flange part 2, put your hand on one or two points on the edge of the tube tip protection cover to spread it outward, When moved to the tip side so as to climb over the side surface, the main body part 4 is separated from the front surface of the opening of the pipe 1. - 特許庁

FIG. 2 is a diagram showing a part of the manufacturing process of the tubular body tip protection cover according to the first embodiment, and FIG. 3 is an explanatory diagram until the tubular body tip protection cover is completed.
2 and 3, the manufacturing process of the tubular body tip protection cover according to the first embodiment will be described below.
Step 1 <FIG. 2A>: A circular film 7 having a diameter L1 (mm) is cut out from a polyethylene film (hereinafter referred to as “PE”) having a thickness of about 100 μm, which will be the main body 4 .
Since the body portion 4 needs to cover at least the front and side surfaces of the flange portion 2, it is necessary to satisfy the relationship L1≧D1×2+R1 (in the case of FIG. 1, L1≈D1×4+R1).
Step 2 <FIG. 2(B)>: A belt-shaped cloth 5 having a width of 20 to 50 mm and a length of L1×π (circumference)+p (mm) that can be placed on the outer periphery of the circular film 7 is prepared.
Note that p=40 to 50 (mm), and an overlapping portion having a length of p is formed.
Step 3 <FIG. 2(C)>: In order to accommodate the rubber cord 6, the cloth 5 folded in two is sewn around the circular film 7 along the sewing line 8. As shown in FIG.
After that, a hole 9 for inserting the rubber cord 6 is formed at approximately the center of the overlapping portion of length p.
・Step 4 <Fig. 3(A)>: The total length M1 (mm) in the fully extended state is about 1.5 times the maximum peripheral length (R1 x π) of the flange portion 2, and the total length N1 (mm) in the contracted state. inserts a rubber cord 6 having approximately the same length as the minimum circumference length (r1×π) of the pipe 1 through the hole 9 .
In FIG. 3(A), the belt-like cloth 5 is depicted as being sewn to the outer periphery of the circular film 7 while the rubber cord 6 is being inserted, but it is actually folded in two. The rubber cord 6 is inserted while pulling the cloth 5 little by little.
・Step 5 <Fig. 3(B)>: The rubber cord 6 is completely inserted into the cloth 5 folded in two, and the one end coming out of the hole 9 and the other end not in the hole 9 are connected. fixed. Then, the cloth 5 folded in two is folded into a bellows shape to form a small circular shape as shown in FIG. A body portion 4 is formed.
In addition, in FIG. 3B, since the side with the hole 9 is the back side, the hole 9 and the connecting portion between the one end and the other end cannot be seen.
Further, in the explanation of step 1 above, it was explained that it is necessary to satisfy the relationship of L1≧D1×2+R1 using the diameter L1 of the circular film 7. is expressed as the diameter of the body portion 4, it becomes unclear which part of the diameter indicates the diameter.
Therefore, in this specification, the diameter of the body portion 4 when the rubber cord 6 is removed and the portion of the cloth 5 is deployed to the outside is referred to as the "deployed diameter of the body portion 4". The length of is referred to as the "circumferential length of the body portion 4 when deployed".

In the above description of the pipe 1 and the pipe tip protection cover according to the first embodiment, since the pipe 1 has various sizes, the pipe 1 has various dimensions, and the diameter of the circular film 7 is L1. was expressed by a mathematical formula using these, but according to the Japan Petroleum Institute standard (JPI standard), in class 150, r1 is 21.7 to 609.6 mm, R1 is 90 to 815 mm, D1 is 11.2 to 47.0 mm. 7mm, class 300 r1 is 21.7-609.6mm, R1 is 95-915mm, D1 is 14.3-69.9mm, class 400 r1 is 114.3-609.6mm, R1 is 255-915mm, D1 is 35.0-76.2mm, class 600 r1 is 21.7-609.6mm, R1 is 95-940mm, D1 is 14.3-101.6mm, class 900 r1 is 89.1-609. 6 mm, R1 is 240-1040 mm, D1 is 38.1-139.7 mm, class 1500 r1 is 21.7-609.6 mm, R1 is 120-1170 mm, D1 is 22.3-203.2 mm.
In addition, in the description of step 1, it was stated that the diameter L1 of the circular film 7 needs to satisfy the relationship of L1≧D1×2+R1. It is better if it is in the range of R1-r1)×2.
Furthermore, regarding the length of the rubber cord 6, the total length M1 (mm) in the fully extended state is about 1.5 times the maximum peripheral length (R1×π) of the flange portion 2, and the total length N1 (mm) in the contracted state. is approximately the same length as the minimum circumferential length (r1×π) of the pipe 1, but if the condition of N1<R1×π<M1 is satisfied, it functions as a pipe tip protection cover, and R1×π×1.2≦ It is easy to use if it is set within the range of M1≦R1×π×2 and r1×π×0.5≦N1≦r1×π.
Regarding the shape and thickness of the rubber cord 6, it may be either a round rubber cord or a flat rubber cord. , If it is long, use a thick one (4 to 20 mm in a contracted state in the case of a round rubber cord).

FIG. 4A is a side view showing a pipe 11 with a joint. At the tip of the pipe 11, a joint having cylindrical bodies 13 and 14 above and below a hexagonal columnar body 12 is attached to a connecting member 15 of the pipe 11. are connected via a cylindrical body 14 of The diameter of the lower cylinder 14 is r2 (mm), the diagonal length of the hexagonal cylinder 12 is R2 (mm), and the thickness (maximum thickness) of the hexagonal cylinder 12 and the upper cylinder 13 is D2. (mm).
4(B) and 4(C) are a side view and a cross-sectional view, respectively, of a state in which the pipe 11 with a joint in FIG. The body portion 16 of the tip protection cover closes the opening of the pipe 11 and covers the upper, side and lower surfaces of the hexagonal columnar body 12 and the upper cylindrical body 13 .
When the rubber cord 18 attached to the lower portion of the body portion 16 by forming the seal portion 17 shrinks, the edge of the tube tip protection cover shrinks on the lower surface side of the hexagonal columnar body 12 to Since it is in close contact with the peripheral surface of the body 14, the main body 16 is held in the state shown in FIGS. 4(B) and 4(C).
When removing the pipe body tip protection cover from the pipe 11, both sides of the rubber string 18 are pinched with fingers and pulled left and right, and the edge of the pipe body tip protection cover is lifted to the tip side so as to get over the side surface of the hexagonal prism body 12. - 特許庁Then, the body portion 16 is separated from the joint connected to the tip of the pipe 11 .

FIG. 5 is a diagram showing a manufacturing process of the tubular body tip protection cover according to the second embodiment.
Hereinafter, the manufacturing process of the tube tip protection cover according to the second embodiment will be described with reference to FIG.
• Process A <Fig. 5(A)>: A PE bag 19 having a thickness of about 20 µm is prepared.
The bag 19 is formed by stacking two rectangular PE sheets, sealing three sides by appropriate means, and leaving only one side unsealed.
• Process B <Fig. 5(B)>: A rubber cord 18 in a substantially stretched state is arranged on the outer peripheral surface of one side of the bag 19.
By preparing a flat jig having a width slightly smaller than the width of the bag 19 and inserting the jig into the bag 19, the rubber cord 18 can be easily arranged.
Step C <FIG. 5(C)>: One side of the bag 19 is folded outward to wrap the rubber cord 18, and the entire circumference of the end is sealed by an appropriate means to form a seal portion 17.
Then, the body portion 16 is formed above the rubber cord 18 and the rubber cord 18 is attached to the bottom portion of the body portion 16 .
Here, as shown in FIGS. 4B and 4C, the main body 16 needs to cover at least the top and side surfaces of the hexagonal prism 12 and the upper cylindrical body 13. When the depth is H2 and the width is L2, it is necessary to satisfy the relationship H2≧D2, and since the perimeter of the opening inner surface of the main body 16 is L2×2, L2×2>R2×π ( approximately the same as the maximum perimeter of the hexagonal prism 12).
- Process D <Fig. 5(D)>: When the rubber cord 18 attached in a substantially stretched state is set in a free state, the edge portion of the main body portion 16 is folded in a bellows shape, and the circumference of the opening is the rubber cord. Since the entire length of the body portion 18 is substantially equal to the entire length of the contracted state, the lower portion of the main body portion 16 is contracted into a shape as shown in FIG.

In the above description of the pipe 1 and the pipe tip protection cover according to the second embodiment, since the pipe 11 has various sizes, the dimensions of each part are r2, R2, and D2, and the depth of the inner surface of the main body 16 is H2. and the width L2 are expressed by a mathematical formula using these, the outer diameter of the connecting member 15 and the joint, that is, R2 is usually in the range of 13.8 to 114.3 mm, r2 is smaller than R2, about 10 to 100 mm, D2 is about 10 to 120 mm in size around R2.
Further, the depth H2 on the inner surface side of the main body 16 must satisfy the relationship H2≧D2, and the peripheral length L2×2 of the opening inner surface of the main body 16 satisfies the relationship L2×2>R2×π. However, if the range of D2 x 1.2 ≤ H2 ≤ D2 x 2 and R2 x π x 1.2 ≤ L2 x 2 ≤ R2 x π x 2, the protective cover for the tip of the tube can be removed. easy.
Furthermore, regarding the length of the rubber cord 18, it has been explained that the rubber cord 18 in a substantially stretched state is arranged on the outer peripheral surface of one side of the bag 19, but the total length of the rubber cord 18 in the stretched state is M2 ( mm), and when the total length in the contracted state is N2 (mm), if the condition of N2 < R2 x π < M2 is satisfied, it functions as a tube tip protection cover, and R2 x π x 1.2 ≤ M2 ≤ R2 x It is easy to use if it is set within the range of π×2 and r2×π×0.5≦N2≦r2×π. If it is desired to fix the tube tip protection cover around the cylindrical body 14 on the lower side, it is preferable to set the range of r2×π×0.5≦N2≦r2×π×0.8.
Regarding the shape and thickness of the rubber cord 18, it may be either a round rubber cord or a flat rubber cord. 2 mm), and if it is long, use a thick one (2 to 5 mm in a contracted state in the case of a round rubber cord).

Modifications of the embodiment are listed.
(1) Pipe tip protection covers according to Examples 1 and 2 are pipes 11 each having a tip portion of a pipe 1 having a flange portion 2 and a joint and a connection member 15 composed of a hexagonal prism 12 and cylindrical bodies 13 and 14. However, the tip of the pipe 11 having the joint and the connecting member 15 may be protected by the tube tip protection cover according to the first embodiment, and the tube tip according to the second embodiment The tip of the pipe 1 having the flange portion 2 may be protected with a protective cover.
Further, the tubular body tip protection covers according to Examples 1 and 2 may be used to protect the tip of various tubular bodies having a large diameter portion at the tip. Therefore, in the scope of claims, the term "pipe body" is used in place of piping, and the term "large-diameter portion" is used in place of flanges and joints.
(2) In Examples 1 and 2, the main bodies 4 and 16 are made of PE, but the members constituting the main bodies 4 and 16 are not limited to PE, and resin films such as unstretched polypropylene films (CPP) may be used. .
Further, in Embodiments 1 and 2, the rubber cords 6 and 18 are round rubber cords or flat rubber cords. etc.) may be adopted. Therefore, in the claims, the expression "flexible sheet member" is used instead of PE, and the expression "annular elastic body" is used instead of rubber cord.

(3) In the first embodiment, when the rubber cord 6 has a long total length, it is explained that a thicker one is used. In some cases, it may not be possible to maintain the pipe tip protection cover in the state shown in FIG. Therefore, by inserting one end of a string that hardly expands and contracts through the hole 9, placing it inside the cloth 5 along the rubber string 6, and pulling it out from the hole 9, a pipe tip protection cover is attached to the tip of the pipe 1. After hanging, by tying one end and the other end of the string as necessary, the pipe tip protection cover can be reliably held in the state shown in FIG. 1(B).
(4) In Example 1, the belt-shaped cloth 5 was folded in two and sewn on the outer periphery of the circular film 7, and the rubber cord 6 was accommodated inside the cloth 5. may be arranged in an extended state, and the outer edge of the circular film 7 may be folded back and welded, or a flat elastic body may be directly fixed to the outer peripheral portion of the circular film 7 to fix it.
(5) The bag 19 of Example 2 was formed by stacking two rectangular pieces of PE, sealing three sides by an appropriate means, and leaving only one side unsealed. Any bag may be used as long as it has a single opening. For example, it is also possible to seal only one end of a cylindrical sheet member connecting opposite sides of one sheet member, or to connect a circular sheet member only to one end of the cylindrical sheet member.

1 Piping 2 Flange 3 Bolt Hole 4 Main Body 5 Cloth 6 Rubber String 7 Circular Film 8 Sewing Line 9 Hole 11 Piping with Joint 12 Hexagonal Column 13 Upper Cylinder 14 Lower Cylinder 15 Connecting Member 16 Main Body 17 Seal part 18 Rubber cord 19 Bag CPP Non-stretched polypropylene film PE Polyethylene film D1 Thickness of flange portion 2 L1 Diameter of circular film 7 M1 Total length of rubber cord 6 in fully extended state N1 Total length of rubber cord 6 in contracted state p Length of overlapping portion r1 Diameter of middle portion of pipe 1 (minimum diameter) R1 Diameter of flange portion 2 (maximum diameter)
D2 Thickness of the hexagonal columnar body 12 and the upper cylindrical body 13
H2 Depth of inner surface of main body 16 L2 Width of inner surface of main body 16 M2 Overall length of rubber cord 18 in fully extended state N2 Overall length of rubber cord 18 in a contracted state r2 Diameter of cylinder 14 R2 Hexagonal cylinder 12 diagonal lengths

Claims (4)

A tube tip protection cover for protecting the tip of a tube having a large diameter portion at the tip,
a circular main body formed of a flexible sheet member;
Having an annular elastic body attached to the periphery of the main body,
The diameter of the main body portion when deployed is equal to or greater than the sum of twice the thickness of the large diameter portion and the maximum diameter of the large diameter portion,
The annular elastic body is
The total length in the fully stretched state is longer than the maximum perimeter of the large-diameter portion,
A pipe tip protection cover, wherein the total length in a contracted state is shorter than the maximum perimeter of the large-diameter portion. 2. The tubular body tip protection cover according to claim 1, wherein a string longer than the circumferential length of the main body when deployed is provided along the annular elastic body. A tube tip protection cover for protecting the tip of a tube having a large diameter portion at the tip,
a bag-like main body formed of a flexible sheet member and having one opening;
Having an annular elastic body attached around the opening,
the depth of the body portion is greater than the thickness of the large diameter portion;
the perimeter of the opening is longer than the maximum perimeter of the large-diameter portion;
The annular elastic body is
The total length in the fully stretched state is longer than the maximum perimeter of the large-diameter portion,
A pipe tip protection cover, wherein the total length in a contracted state is shorter than the maximum perimeter of the large-diameter portion. The tubular body tip protection cover according to claim 3, wherein the full length of the annular elastic body in a contracted state is shorter than the minimum circumferential length of the tubular body.

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