JP4020067B2 - Cylindrical member connection structure and connection method - Google Patents

Description

  The present invention relates to a joint used for connecting a building fence.

Conventionally, a connection structure using a joint in a rainwater fence for a building is disclosed in Japanese Patent Laid-Open No. 5-248048. In this joint, the upper side of the tubular joint body is the water-side insertion cylinder part, the lower side is the water-side insertion cylinder part, and the taper is tapered at the tip of the water-side insertion cylinder part. The outer diameter of the tip of the water-side insertion cylinder is almost matched with the inner diameter of the flange that connects, and an adhesive reservoir groove is formed in the middle outer periphery of the water-side insertion cylinder To do. This joint is connected in a state in which the hook is easily fitted and connected, and the appearance is good and the waterproofness is ensured.
Japanese Patent Laid-Open No. 5-248048

  However, when the above-mentioned joint is used to apply the adhesive to the water-side insertion cylinder part and fit the gutter into the adhesive, the excess adhesive will remain in the middle of the water-side insertion cylinder part. It can be stored in the groove to prevent the excess adhesive from sticking out, but the adhesive is sealed in the concave groove so that the solvent in the adhesive does not evaporate. In some cases, it was swollen.

  In addition, even if the application amount of the adhesive is reduced to the minimum required amount during construction, the adhesive may accumulate more than necessary due to variations in construction at the site, and in contact with the inner surface of the bag, in rare cases, In some cases, the cocoon resin swelled.

  In that case, the outer surface of the heel may be deformed to deteriorate the appearance, and the strength of the heel may be reduced.

    Therefore, the present invention avoids swelling by preventing excess adhesive from coming into contact with the heel without causing variation in the amount of adhesive applied when the heel is adhesively bonded using the joint. An object of the present invention is to provide a connection structure having a good appearance of the heel without deforming the outer surface of the heel and without reducing the strength of the heel.

  The invention of claim 1 is a first cylindrical member and an insertion inserted into the inner surface of the first cylindrical member through an adhesive while being inserted from the opening end of the first cylindrical member. A connecting structure of a cylindrical member for connecting a second cylindrical member having a connecting portion, and in the first cylindrical member in advance on the lower end side of the insertion connecting portion of the second cylindrical member. A retention preventing member is provided which is inserted and disposed in contact with the lower end of the insertion connecting portion and isolates the excess adhesive accumulated on the lower end side of the insertion connecting portion from the inner surface of the first cylindrical member. Yes.

Further , the accumulation preventing member has an annular member having a side wall that contacts the inner surface of the first cylindrical member, and an abutting end that is provided at one open end of the side wall and contacts the lower end surface of the insertion connecting portion. It is characterized by consisting of.

Further , a protruding portion is formed on the outer peripheral surface of the side wall of the annular member.

The invention according to claim 2 is the connecting structure of the cylindrical members according to claim 1 , characterized in that a taper is formed at the contact end of the annular member from the vicinity of the side wall toward the inside of the annular member. Yes.

The invention according to claim 3 is the connection structure of the cylindrical member according to claim 1 or 2 , wherein a notch is provided in a part of the side wall of the annular member, and the cylindrical member is in a natural state. The both ends of the notch are close to each other in a state of being inserted into the cylindrical member.

The invention of claim 4 is the connecting structure of the cylindrical member according to any one of claims 1 to 3 , wherein the first cylindrical member is a thin and long main body, and the main body. And a flange portion where the second cylindrical member abuts against the opening end of the first cylindrical member, and provided on both sides with the flange portion interposed therebetween. It is a saddle joint comprising an insertion connecting portion inserted into the inside from the opening end of the flange.

According to a fifth aspect of the present invention, there is provided a first cylindrical member and an insertion inserted into the inner surface of the first cylindrical member through an adhesive while being inserted into the inside from the opening end of the first cylindrical member. It is a connection method of the cylindrical member which connects the 2nd cylindrical member which has a connection part,
After the retention preventing member is inserted into the first cylindrical member from the opening end, the insertion connecting portion of the second cylindrical member is inserted into the first cylindrical member from the opening end, and an adhesive The outer surface of the insertion connecting portion of the second cylindrical member is joined to the inner surface of the first cylindrical member through the lower end portion of the insertion connecting portion by bringing the accumulation preventing member into contact with the lower end of the insertion connecting portion. It is characterized in that the excess adhesive that accumulates in is isolated from the inner surface of the first cylindrical member.

The invention according to claim 6 is the invention according to claim 5 , wherein after the retention preventing member is inserted into the first cylindrical member, an adhesive is applied to the inner surface of the first cylindrical member, The insertion connecting portion is inserted into the first cylindrical member.

A seventh aspect of the present invention is the fifth aspect of the present invention, wherein the anti-retention member is applied between the lower end of the anti-retention member and the inner surface of the first cylindrical member at a position above the lower end. The second cylindrical member is pressed at the lower end of the insertion connecting portion by insertion of the insertion connecting portion into the first cylindrical member.

  According to the first aspect of the present invention, since the lower end of the insertion connecting portion abuts against the stagnation preventing member, excess adhesive accumulated on the lower end side of the insertion connecting portion can be isolated from the inner surface of the first cylindrical member. . Therefore, since excess adhesive does not contact the heel, the outer surface of the heel around the joint is not deformed, and the strength of the heel does not decrease. The appearance of the kite also improves.

Moreover , since the accumulation preventing member is an annular member, the surplus adhesive can be isolated over substantially the entire inner surface of the first cylindrical member. Therefore, the outer surface of the peripheral heel does not deform and the strength of the heel does not decrease.

According to invention of Claim 1 or Claim 2 , since the lower end of an insertion connection part contact | abuts reliably with a retention prevention member, it can isolate | separate excess adhesive over the inner peripheral surface of a 1st cylindrical member. it can. Therefore, the outer surface of the collar around the joint is not deformed, and the strength of the collar does not decrease.

According to the third aspect of the present invention, even if the inner surface of the first cylindrical member is distorted, the retention preventing member can be inserted without being displaced, so that the lower end of the insertion connecting portion reliably contacts the retention preventing member. The excess adhesive can be isolated from the inner surface of one cylindrical member. Therefore, the outer surface of the collar around the joint is not deformed, and the strength of the collar does not decrease.

According to the invention of claim 4 , since the positioning can be reliably performed by the flange portion, the lower end of the insertion connecting portion can be surely brought into contact with the retention preventing member, and the excess adhesive can be isolated from the first tubular member. it can. Therefore, the outer surface of the collar around the joint is not deformed, and the strength of the collar does not decrease. The appearance of the kite also improves.

According to the fifth to seventh aspects of the present invention, since the excess adhesive does not contact the heel, the heel outer surface around the joint is not deformed, and the strength of the heel does not decrease.

<Configuration of connection structure of cylindrical members>
Hereinafter, a first embodiment of the present invention will be described with reference to FIG.

  As shown in FIGS. 1 (a) and 1 (b), the connecting structure of the cylindrical member of this embodiment is inserted into the interior from the flange 1 (first cylindrical member) and the open end 2 of the flange 1. It is an example applied to the connection with the flange joint 4 (second cylindrical member) having the insertion connection portion 3 joined to the inner surface 1a of the flange 1 through the adhesive 5a.

  The rod 1 includes a thin and long cylindrical main body 7 and an opening end 2 provided on the main body 7. The flange joint 4 is provided with a flange portion 8 that is in contact with the opening end surface 1b formed at the opening end 2 of the flange 1, and an insertion connection portion 3 provided on both sides with the flange portion 8 interposed therebetween. 3 is inserted into the inside of the heel 1 from the open end 2 of the heel 1.

  The flange portion 8 is a rectangular convex shape composed of a top wall 8 a and two side walls 8 b, and is formed integrally with the flange joint 4 on the entire periphery of the flange joint 4. The two side walls 8b are parallel to each other, and the top wall 8a is formed so as to be substantially at the same level as the outer surface 1c of the flange 1.

  On the lower end 3b side of the insertion connecting portion 3 of the saddle joint 4, it is inserted into the flange 1 in advance and is brought into contact with the lower end 3b of the insertion connecting portion 3 so as to accumulate on the lower end 3b side of the insertion connecting portion 3. An annular member 6 (an accumulation preventing member) is provided to isolate the excess adhesive 5 from the inner surface 1a of the flange 1 (as shown in FIG. 1B).

  As shown in FIGS. 2 (a), (b), and (c), the outer peripheral surface 3a slightly above the intermediate portion of the insertion connecting portion 3 on the lower side of the flange joint 4 has a substantially 3/4 circumference. A protrusion 3c is provided substantially parallel to the lower end 3b.

  The one end 3d of the protrusion 3c bends toward the lower end 3b of the insertion connecting portion 3 while the height of the protrusion 3c gradually decreases, and the level position of the protrusion 3c at the lower end 3b and the other end Are disposed so as to disappear at a substantially intermediate position 3f.

  The outer diameter of the insertion connecting portion 3 is formed to be slightly smaller than the inner diameter of the flange 1, but the annular member 6 and the flange 1 can be appropriately fitted by the protrusion 3 c.

  A taper 3g is formed on the inner surface side of the upper end surface 3e of the insertion connecting portion 3 on the upper side of the flange joint 4.

  As shown in FIGS. 3A and 3B, the annular member 6 has a cylindrical cylindrical shape, and the side surface 6a (outer peripheral surface) is formed at the same height on the entire circumference. The upper surface of the annular member 6 becomes an abutting end 6 b that contacts the lower end 3 b of the insertion connecting portion 3.

  Here, the outer diameter of the annular member 6 is formed to be slightly smaller than the inner diameter of the flange 1, but an appropriate fit can be obtained in consideration of variation in the shape of the contact surface of the annular member 6 or the flange 1. It has become.

  Furthermore, the inner diameter of the gutter joint 4 and the inner diameter of the annular member 6 are formed so as to be substantially the same diameter so as to reduce resistance when rainwater flows through the inside.

  In addition, the material of the collar 1, the collar joint 4, and the annular member 6 is made of a synthetic resin such as a hard vinyl chloride resin in consideration of weight reduction and corrosion resistance.

  Next, a connection method for assembling and joining the flange 1, the flange joint 4, and the annular member will be described with reference to FIG.

  <First Stage> As shown in FIG. 4A, the annular member 6 is inserted from the open end 2 of the ridge 1 in the direction indicated by the arrow. At this time, the upper surface of the annular member 6 is the abutting end 6 b that abuts the lower end 3 b of the insertion connecting portion 3.

  <Second Stage> As shown in FIG. 4B, the annular member 6 inserted in the first stage is inserted shallowly from the opening end 2 of the flange 1, and is not the final position of the annular member 6. . An appropriate amount of adhesive 5a is uniformly applied to an intermediate portion (inner surface 1a of the collar 1) of the space M between the contact end 6b and the opening end 1b at the insertion position. In this state, the flange joint 4 is inserted in the direction of the arrow.

  <Third Stage> As shown in FIG. 4 (c), even when the insertion connecting portion 3 of the flange joint 4 is inserted, the inner surface 1a near the opening end 2 of the flange 1 is deformed and distorted. Since the protrusions 3c and 3d are provided, flexibility is obtained, and the insertion connecting portion 3 can be easily inserted into the inner surface of the flange 1 and connected to the annular member 6.

  Furthermore, the end 3d of the protrusion 3c is arranged so that the height of the protrusion 3c gradually decreases and disappears in a curved manner downward, so that the insertion of the insertion connecting portion 3 is smoother. Can be implemented.

  The adhesive 5a accumulates in the gap between the outer peripheral surface 3a of the insertion connection portion 3 secured by the protrusion 3c and the inner surface 1a of the flange 1 so that the opening end portion 1b is in contact with the flange portion 8 at a position where The heel 1 and the heel joint 4 are fixed.

  At this time, during the insertion operation, the lower end 3b of the insertion connecting portion 3 and the annular member 6 move while always in contact with each other, so that the excess adhesive 5 is squeezed out from the gap between the lower end 3b and the contact end 6b as needed. . Therefore, the excess adhesive 5 squeezed out can be isolated from the inner surface 1a of the ridge 1 as shown in FIG.

<Operation of connection structure of cylindrical member>
As described above, the flange portion 8 is a convex shape including the top wall 8a and the two side walls 8b, and the two side walls 8b are parallel surfaces. Therefore, the side surface 8b of the flange portion 8 and the opening end portion 1b of the flange 1 are in surface contact with each other, so that the positioning of the flange joint 4 and the flange 1 can be ensured. Similarly, since the effect is also connected to the annular member 6, the lower end 3 b of the insertion connecting portion 3 can reliably and easily come into surface contact with the contact end 6 b of the annular member 6.

  Then, the adhesive 5a can be squeezed out as an excess adhesive 5 from the lower end 3b of the insertion connecting portion 3 and the abutting end 6b of the annular member 6 to be isolated.

  When the insertion connecting portion 3 of the flange joint 4 is inserted from the opening end 2, the lower end 3b of the insertion connecting portion 3 and the abutting end 6b of the annular member 6 are moved downward while being always in contact with each other. Since a contact pressure is applied, a gap is not reliably generated between the lower end 3b and the contact end 6b in the state after insertion. Therefore, the effect that the excess adhesive 5 does not adhere to the ridge 1 can be obtained with certainty.

  Thus, since the excess adhesive 5 squeezed out contacts the side surface 6a of the annular member 6, the annular member 6 is slightly swollen, but the heel 1 is not affected. Further, if necessary, the excess adhesive 5 can be discharged by flowing water into the basket 1. Further, the gap between the annular member 6 and the flange 1 is much narrower than the gap between the outer peripheral surface 3a and the inner surface of the flange 1, so that the adhesive does not actually enter, but slightly enters. Even so, the problem of swelling with respect to the ridge 1 does not occur at all.

  Thus, since the excessive adhesive agent 5 does not contact the inner surface 1a of the collar 1, the outer surface 1c of the collar 1 is not deformed, and the strength of the collar 1 is not lowered.

  In addition, the length of the insertion connecting portion 3 and the annular member 6 in the insertion direction is formed in consideration of the length that each connection strength can keep to the minimum.

  The height of the side wall 8b of the flange portion 8 is formed such that the top wall 8a is substantially flush with the outer surface 1c of the flange 1 in a state where the insertion connecting portion 3 is mounted on the flange 1. . Therefore, it is possible to provide a connection structure that is clean and excellent in appearance.

  Here, the insertion connecting portion 3 on the upper side of the heel joint 4 is connected to a heel or a side ridge not shown. At this time, as shown in FIG. 2A, since the taper 3f is formed on the inner surface side of the upper end surface 3e of the insertion connection portion 3 on the upper side of the flange joint 4, the upper end surface of the insertion connection portion 3 is formed. In addition to the fact that the surplus adhesive 5 accumulates less in 3e, most of the surplus adhesive 5 flows naturally to the inner surface side of the saddle joint 4 due to its own weight, so that it is easily isolated from the inner surface of the collar 1. Therefore, the amount of the adhesive enough to contact and affect the inner surface 1a of the heel 1 does not accumulate, so the annular member 6 is not particularly required on the upper side of the heel joint 4.

<Other embodiments>
Next, a second embodiment of the present invention will be described. As shown in FIGS. 5A and 5B, the annular member 6 has a cylindrical cylindrical shape, and the side wall 6e is formed at the same height over the entire circumference. And the protrusion part 6c is provided over the perimeter in the approximate center part of the side surface 6a (outer peripheral surface).

  At this time, the outer diameter of the annular member 6 is formed to be slightly smaller than the inner diameter of the flange 1, but the annular member 6 and the flange 1 can be appropriately fitted by the protruding portion 6 c. Yes.

  That is, since the annular member 6 and the flange 1 are in line contact with each other by the projection 6c, the annular member 6 can be removed even if the inner surface 1a of the flange 1 and the outer surface 6a of the annular member 6 are subjected to surface distortion or variation. 1 can be inserted smoothly without tilting and sticking, and displacement after insertion can be prevented.

  Therefore, when the insertion connecting portion 3 is next inserted into the flange 1, the lower end 3 b of the insertion connecting portion 3 can surely come into contact with the contact end 6 b of the annular member 6. The excess adhesive 5 can be isolated from 1a over the entire circumference.

  And since the excessive adhesive agent 5 does not contact the collar 1, the outer surface 1c of the collar 1 is not deformed, and the strength of the collar 1 is not lowered.

  Next, a third embodiment of the present invention will be described. As shown in FIGS. 6 (a) and 6 (b), the annular member 6 has a cylindrical cylindrical shape, and the contact end 6b on the upper surface of the side wall 6e is tapered toward the inside. The outer diameter of the annular member 6 is formed to be slightly smaller than the inner diameter of the flange 1, but an appropriate fit can be obtained in consideration of variations in the shape of the contact surface of the annular member 6 or the flange 1. Yes.

  With this structure, when the lower end 3 b of the insertion connecting portion 3 abuts against the abutting end 6 b of the annular member 6, the excess adhesive 5 applied to the outer peripheral surface 3 a of the insertion connecting portion 3 is pushed out and the annular member 6. It flows out to the inner surface 67. At this time, since the taper 6d is formed on the upper surface of the annular member 6 on the inner surface 67 side, the amount of the excess adhesive 5 accumulated at the contact end 6b on the upper side of the annular member 6 is reduced, and the excess adhesive 5 It flows down naturally along the taper 6d by its own weight. Therefore, since the excessive adhesive 5 does not contact the heel 1 in a large amount, the outer surface 1c of the heel 1 is not deformed, and the strength of the heel 1 does not decrease.

  Next, a fourth embodiment of the present invention will be described. 7 (a) and 7 (b), the annular member 6 has a cylindrical cylindrical shape, and a notch 6f is provided in a part of the side wall 6e. The outer diameter of the annular member 6 is formed to be slightly larger than the inner diameter of the flange 1.

  Therefore, when the annular member 6 is inserted into the flange 1, the outer diameter of the annular member 6 can be made smaller than the inner diameter of the flange 1 by narrowing the gap S of the notch 6 f of the annular member 6. Since the annular member 6 can be inserted in a state where the 6 and the flange 1 are hardly in contact with each other, the annular member 6 can be smoothly inserted without sticking to the flange 1.

  When the annular member 6 is attached at a predetermined position, the annular member 6 is stably attached to the inner surface 1a of the bag 1 by a force for returning the annular member 6 to a natural state. Note that the gap S is set to such an extent that the adhesive 5a does not affect the ridge 1 so much.

  Next, a fifth embodiment of the present invention will be described with reference to FIG.

  8A and 8B, the annular member 6 has a cylindrical cylindrical shape, and a notch 6f is provided in a part of the side wall 6e. Then, as shown in FIG. 8 (c), the separated ends 6f1 and 6f2 are formed with one end at the recess 6h and the other end at the projection 6g, and the ends 6f1 and 6f2 are separated from each other by the gap S. In this state, the concavo-convex part is inserted on the same circumference.

  Further, the side walls T on both sides where the concave portion 6h and the convex portion 6g are in contact with each other are formed in parallel, and a part K of the side walls T on both sides is substantially in contact with each other in a natural state. Note that the gap S is set to such an extent that the adhesive 5a does not affect the ridge 1 so much. The outer diameter of the annular member 6 is formed to be slightly larger than the inner diameter of the flange 1.

When the annular member 6 having such a structure is inserted into the flange 1, the outer shape of the annular member 6 can be made smaller than the inner diameter of the flange 1 by narrowing the gap S of the notch 6f. Can be inserted smoothly without sticking.
When the annular member 6 is attached at a predetermined position, the annular member 6 is stably attached to the inner surface 1a of the bag 1 by a force for returning the annular member 6 to a natural state.

  When the annular member 6 is inserted, a restraining force is applied so that the annular member 6 is not twisted by the portion K of the concavo-convex portion. Therefore, the annular member 6 is not deformed, and the annular member 6 is stabilized. Can be attached.

  As mentioned above, although embodiment of this invention was described based on drawing, all the above-mentioned examples show an example of this invention, and it cannot be overemphasized that this invention should not be limited to these. Absent.

  For example, the insertion connecting portion 3 of the annular member 6 may be tapered so that the annular member 6 can be inserted smoothly, and the outer diameter of the lower end 3b may be slightly smaller than the outer diameter in the vicinity of the flange portion 8. Good.

  The protruding portion 6c on the side surface 6a (outer peripheral surface) of the annular member 6 does not necessarily have to be provided over the entire circumference and may be substantially the entire circumference. Moreover, the protrusion part 6c may be plural.

  Then, the insertion stability may be increased by making the length of the annular member 6 in the insertion direction longer than that of the insertion connecting portion 3 so that no inclination occurs when the annular member 6 is inserted.

  The cylindrical member connected to the insertion connecting portion 3 at the upper part of the annular member 6 can be applied to various things, and for example, it may be a ridge 1 or may be connected to a horizontal ridge or others.

  Although the annular member 6 is used for joining with the lower insertion connecting portion 3 in the embodiment, it may be similarly applied to the upper portion.

  Moreover, although the recessed part 6h and the convex part 6g are formed in 1 set, the combination of several sets of unevenness | corrugations may be sufficient.

  The present invention can also be applied to joining other tubular members, and can be used, for example, for connecting ordinary household water, air conditioning, and other piping paths.

(A) is sectional drawing of the connection structure of the cylindrical member in the 1st Embodiment of this invention, (b) is A section detail drawing. (A) is sectional drawing, (b) is a side view, (c) is AA sectional drawing of the flange coupling in the 1st Embodiment of this invention. (A) of the cyclic | annular part in the 1st Embodiment of this invention is sectional drawing, (b) is a side view. It is explanatory drawing of the procedure which assembles and joins the collar 1, the collar joint 4, and the annular member in the first embodiment of the present invention, (a) is the first stage, (b) is the second stage, and (c) is The third stage is shown. (A) of the cyclic | annular part in the 2nd Embodiment of this invention is sectional drawing, (b) is a side view. (A) of the cyclic | annular part in the 3rd Embodiment of this invention is sectional drawing, (b) is a side view. (A) of the cyclic | annular part in the 4th Embodiment of this invention is sectional drawing, (b) is a side view. (A) of a cyclic | annular part in the 5th Embodiment of this invention is sectional drawing, (b) is a side view, (c) is B section detail drawing.

Explanation of symbols

1 竪 樋 (first cylindrical member)
DESCRIPTION OF SYMBOLS 1a Inner surface 1b Open end part 1c Outer surface 2 Open end 3 Insertion connection part 3a Outer peripheral surface 3b Lower end 4 Joint (2nd cylindrical member)
4a inner surface 5 surplus adhesive 5a adhesive 6 annular portion 6a side surface (outer peripheral surface)
6b Contact end 7 Main body 8 Flange 8a Top surface 8b Side surface

Claims (7)

A second tubular member having a first tubular member and an insertion connecting portion which is inserted into the inside from the opening end of the first tubular member and joined to the inner surface of the first tubular member via an adhesive. A connection structure of a cylindrical member that connects the cylindrical member,
At the lower end side of the insertion connecting portion of the second cylindrical member, it is inserted into the first cylindrical member in advance and is disposed in contact with the lower end of the insertion connecting portion, and at the lower end side of the insertion connecting portion. Providing an anti-retention member that isolates excess adhesive that accumulates from the inner surface of the first tubular member;
From the annular member which the said pool prevention member has the side wall contact | abutted to the inner surface of a 1st cylindrical member, and the contact end provided in one opening end of this side wall, and contact | abuts the lower end surface of the said insertion connection part And a projecting portion is formed on the outer peripheral surface of the side wall of the annular member. 2. The connection structure for a cylindrical member according to claim 1 , wherein a taper is formed at the contact end of the annular member from the vicinity of the side wall toward the inside of the annular member. . It is a connection structure of the cylindrical member of Claim 1 or Claim 2 , Comprising: A notch part is provided in a part of side wall of the said annular member, and it forms in a larger diameter than the internal diameter of the said cylindrical member in a natural state. A connecting structure for a cylindrical member, wherein both ends of the cutout portion are close to each other in a state of being inserted into the cylindrical member. A connecting structure according to claim 1 or any one of the description of the tubular member according to claim 3, said first tubular member is shaped thin elongated body, an open end provided on the main body A flange portion in which the second cylindrical member abuts against an opening end of the first cylindrical member, and an opening of the flange provided on both sides with the flange portion interposed therebetween A connecting structure for a cylindrical member, characterized in that it is a flange joint comprising an insertion connecting portion inserted into the inside from the end. A second tubular member having a first tubular member and an insertion connecting portion which is inserted into the inside from the opening end of the first tubular member and joined to the inner surface of the first tubular member via an adhesive. A connecting method of a cylindrical member for connecting the cylindrical member,
After the retention preventing member is inserted into the first cylindrical member from the opening end, the insertion connecting portion of the second cylindrical member is inserted into the first cylindrical member from the opening end, and an adhesive The outer surface of the insertion connecting portion of the second cylindrical member is joined to the inner surface of the first cylindrical member via
Connecting the cylindrical member, wherein the anti-sagging member is brought into contact with the lower end of the insertion connecting part to isolate the excess adhesive accumulated in the lower end of the insertion connecting part from the inner surface of the first cylindrical member. Method. 6. The method for connecting cylindrical members according to claim 5 , wherein after the retention preventing member is inserted into the first cylindrical member, an adhesive is applied to the inner surface of the first cylindrical member, and then inserted and connected. The cylindrical member connection method, wherein the portion is inserted into the first cylindrical member. It is a connection method of the cylindrical member of Claim 5 , Comprising: As for the said pool prevention member, the said adhesive agent is apply | coated between the inner surface of a pool prevention member and a 1st cylindrical member in the position above the lower end, A method for connecting cylindrical members, wherein the second cylindrical member is pressed by insertion into the first cylindrical member at a lower end portion of the insertion connecting portion of the second cylindrical member.

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