JP2562777B2 - Method for joining elastic bodies and binder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention adheres a vulcanized rubber product such as a water stop plate or other article to be joined made of an elastic body or the like in a short time by using an intermediate binder made of rubber or synthetic resin and an instant adhesive. The present invention relates to a simple joining method for elastic bodies and the like and a binder used in this method.

[0002]

2. Description of the Related Art Since a water blocking plate made of vulcanized rubber that is embedded in advance in a joint portion of a concrete structure or the like to prevent water from entering is generally long, it is necessary to join a plurality of water blocking plates together.
It is used as one water stop plate.

As a conventional method for joining rubber water blocking plates, a baking joining method using a heater mold has been widely used. In this method, first, the joint end portion of the water blocking plate is obliquely cut in the thickness direction, each joint end surface is subjected to surface treatment such as buffing or grindering, and then rubber glue is applied to the joint end surface. Allow to dry for 10 minutes. Next, a sheet made of unvulcanized rubber is attached so as to cover each joint end surface, and then two water blocking plates are baked and joined using a heater die a as shown in FIG. That is, the heater mold a has a structure in which heaters d and e are superposed on top and bottom of upper and lower molds b and c, and an unvulcanized rubber sheet covering the joint end faces of the water blocking plates f and g to be joined. The water blocking plates f and g are sandwiched between the upper and lower molds b and c so that they are in contact with each other, and the press h is moved downward to press the water blocking plates f and g at 140 ° C. for 15 to 15 ° C.
By heating for 25 minutes, each unvulcanized rubber sheet is vulcanized and baked and bonded to each other.

[0004]

As described above, the conventional baking and joining method using a heater die is a surface treatment step such as buffing, a step of applying a rubber paste to the joining end surface, and a step of attaching an unvulcanized rubber sheet. Since the operation is complicated over a number of steps such as the press vulcanization step using the heater die, the joining work requires skill and it takes time to complete the joining. Especially when joining the water stop plates at the construction site, it is necessary to use a heater mold exclusively for the construction site, but this mold is heavy and difficult to transport, and its operation is particularly complicated and requires skill. There is a problem that only a specialized engineer can perform the joining work.

It is also conceivable to bond the water blocking plate with an instant adhesive, but a long and large vulcanized rubber product like the water blocking plate has a relatively large joint surface and a uniform cut surface. Moreover, since the instant adhesive applied to the joint surface flows downward rapidly, a sufficient amount of instant adhesive can be applied over the entire joint surface at the time of actually joining the water stop plate. Not applied, the top of the mating surface has dried up, and thus does not give a perfect bond. Therefore, the present situation is that the vulcanized rubber products of this kind are not joined by the instant adhesive.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and is a method of using an instantaneous adhesive agent without using a conventional heater die which is heavy and complicated in operation. It is an object of the present invention to provide a simple joining method for vulcanized rubber products such as a water blocking plate capable of complete adhesion and other joined objects made of an elastic body or the like, and a binder used in the method.

[0007]

[Means for Solving the Problems] A method for joining elastic bodies and the like according to the present invention which achieves the above object, comprises a joining surface to be joined to one member to be joined and a joining surface to another member to be joined. And a binder made of soft rubber or synthetic resin in which a ridge extending from one side to the other is formed on each joint surface, and the binder is arranged so that the ridge is horizontal. In this state, the instantaneous adhesive is applied to the respective joint surfaces in the state where the is positioned, and then the joint end surfaces of the jointed bodies to be joined are pressure-bonded to the joint surfaces of the binder.

In one aspect of the present invention, the binder used in the above method has, in addition to the above-mentioned features, other protrusions formed in a direction intersecting with the protrusions.

Further, the protrusion of the binder has a height of 0.1 to 10.
It is preferably formed with a pitch of 0.5 mm and a vertical pitch of 0.5 to 2.0 mm.

[0010]

[Function] Since each joint surface of the binder is provided with a ridge, if the instantaneous adhesive is applied to each joint surface in a state where the binder is positioned so that the ridge is horizontal, the instantaneous adhesive will not protrude. Since it is prevented from flowing downward by the strips and is stored in the binder joint surface on the upper side of the ridges, a sufficient amount of each binder joint surface is almost entirely covered at the time of joining the joined objects such as the water blocking plate. Instant adhesive has been applied and complete adhesion is achieved. Also, since the binder is made of soft rubber or synthetic resin, the ridges of the binder can be easily crushed by crimping the joint end faces of both objects to be joined to each joint surface of the binder Becomes flat, and the joint end surface of the body to be joined and the joint surface of the binder come into close contact with each other and are firmly joined.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show an embodiment in which the present invention is applied to a water blocking plate made of vulcanized rubber, FIG. 1 (a) is a front view showing an example of a binder, and FIG. 1 (b) is a side view thereof. , Fig. 2
FIG. 3 is a perspective view showing a method of joining two water blocking materials using a binder, and FIG. 3 is a view showing each example of the cross-sectional shape of the ridge.

As shown in FIG. 1, the binder 1 used for joining a pair of water blocking materials in the method of the present invention has a cross-sectional shape that matches the cross-sectional shape of the water blocking materials 2 and 3 shown in FIG. It has a proper elasticity and flexibility so that when it is crimped to the joint end surface of the water stop plate, it easily fits into the joint end surface and the ridges described later are easily crushed, and it is relatively strong and waterproof. Made from soft rubber or soft synthetic resin having. As such a material, one having a JIS hardness of 30 to 65 Hs is suitable, and for example, an NR type soft rubber having a hardness of 35 to 35 Hs.
40 Hs, tensile strength 180 kg / cm ^{2 to} 270 kg
/ Cm ² , elongation of about 640% to 750%, or CR type natural vulcanized rubber, hardness of 30 to 35 Hs (about 60 Hs after vulcanization), tensile strength (after vulcanization) 100 kg / c
Those having an m ^{2 of} about 600% and an elongation of about 350% (after vulcanization) are suitable. The binder 1 has a thickness d of 3 to 20.
mm is preferable.

The binder 1 is one water stop plate 2 to be joined.
And a joint surface 5 with the other water blocking plate 3, and each joint surface 4, 5 is formed with a plurality of protrusions 6 extending from one side to the other side. Has been done. The cross-sectional shape of the ridge 6 can be selected as a semi-circular shape, a rectangular shape, or the like, but as shown in FIG. 1 (b) and FIG. 3 (a), it is roughly V-shaped or as shown in FIG. 3 (b). The triangular cross-sectional shape in which one side is perpendicular to the joint surface and inclined with respect to the other joint surface effectively prevents downward flow of the instant adhesive and minimizes the volume of the ridges to stop water. It is particularly preferable because the ridges are most likely to be crushed when they are crimped to the joint end faces of the plates.

In general, when two objects to be bonded are bonded to each other, the joint end surfaces are often roughened with sandpaper, buff or the like, but as a result of the experiment, a ridge is formed on the binder 1 of the above embodiment. Even if it is roughened with sandpaper, buffs, etc. instead of being provided, the drying speed of the instant adhesive is the same as when the surface is smooth, and if multiple dotted projections are formed on the binder 1 instead of ridges, instant bonding It has been found that the agent reacts faster than when the surface is smooth and dries faster, and neither of them can achieve the object of the present invention.

As a result of the experiment, the height of each ridge 6 is 0.
1-0.5 mm, the pitch between each ridge is 0.5-2.0 m
It has been found that a satisfactory adhesive effect can be obtained in the range of m.

In the embodiment of FIG. 1, all of the plurality of ridges 6 are formed so as to extend in one direction, but in addition to this, a direction intersecting with the ridges 6 (when orthogonal or obliquely intersected) By forming other protrusions (not shown) on both (including both) to form a lattice pattern on each of the bonding surfaces 4 and 5 of the binder 1, the flow preventing effect of the instant adhesive is further enhanced. You can

Next, a method of joining the water blocking plates 2 and 3 to each other using the binder 1 will be described.

As shown in FIG. 2, the water blocking plates 2 and 3 are arranged, and the binder 1 is positioned so that the protrusions 6 of the binder 1 are horizontal.
Is applied to each of the bonding surfaces 4 and 5. As the instant adhesive, commercially available instant adhesives such as “Aron-α” (trademark) manufactured by Toagosei Co., Ltd. and “Cyanobond” (trademark) manufactured by Sumitomo Chemical Co., Ltd. can be used. Bonding surface 4 of binder 1,
As for the instant adhesive applied to 5, the protrusions 6 arranged in the horizontal direction prevent the flow of the instant adhesive as a cough.
It stays on the joint surfaces 4, 5 above each ridge 6 and is prevented from drying immediately. Next, when the joint end surfaces 2a, 3a of the water blocking plates 2, 3 to be joined are pressure-bonded to the opposing joint surfaces 4, 5 of the binder 1 arranged between the water blocking plates 2, 3, the ridges 6 are crushed. The joint surfaces 4 and 5 become flat, and the joint end surface 2a of the water blocking plate 2 and the joint surface 4 of the binder 1 and the joint end surface 3a of the water blocking plate 3 and the joint surface 5 of the binder 1 are in close contact with each other. A strong adhesive state can be obtained.

In order to measure the effect of improving the adhesive strength by providing a ridge on the binder in the method of the present invention,
As shown in FIG. 4, length 50 mm, width 50 mm, thickness 10
A pair of vulcanized rubber plates 7 and 8 having a size of 8 mm were joined together with a binder 9 having an instant adhesive applied to each joining surface. The binder 9 has a height of 0.3 mm and a pitch of 1.0 m on each joint surface.
NR with a thickness of 9 mm formed by 10 horizontal projections of m
Made of soft rubber, hardness 38Hs, tensile strength 260kg /
Experiments were carried out using two kinds of binders, which have the same cm ² and elongation of 720%, and the same binder as the above binder except that the above-mentioned ridges are not formed for comparison.

Thirty seconds after the instant adhesive was applied, the vulcanized rubber plates 7 and 8 were bonded to the respective bonding surfaces of the binder 9. After solidification of the instant adhesive, the upper part 1 of the bonded vulcanized rubber plates 7, 8
The test piece 12 was cut out from each of 0 and the lower part 11, and the adhesive strength was measured by a tensile test. The results are shown in the table below.

Table Binders have ridges Binders have no ridges Test piece upper part 50 kg / cm ² 0 kg / cm ² (no adhesion) Test piece lower part 52 kg / cm ² 49 kg / cm ²

From the measurement results, the instantaneous adhesive is uniformly applied to the entire bonding surface in the case where the binder has a ridge, but the instantaneous adhesive flows to the lower part in the case where the binder does not have a ridge. It can be seen that the adhesiveness on the top is extremely poor because there is almost no residue left.

The present invention is preferably applied to joining vulcanized rubber products such as water-stop plates, but not limited to this, joining various elastic bodies together, and one elastic body such as rubber and the other synthetic resin. It is also possible to apply it to the joining of both in the case of non-elastic bodies such as. However, when the non-elastic body is steel, the durability of the instant adhesive is lost, which is unsuitable.

[0024]

As described above, according to the present invention, since each joint surface of the binder is provided with a ridge, each binder is placed in a state in which the binder is positioned so that the ridge is horizontal. When the instant adhesive is applied to the surface, the instant adhesive is prevented from flowing downward by the ridges and is stored in the bonding surface of the binder on the upper side of the ridges. At the time of making it, a sufficient amount of instant adhesive is applied to almost all of the bonding surfaces of the binder,
Perfect adhesion is achieved. Also, since the binder is made of soft rubber or synthetic resin, the ridges of the binder can be easily crushed by crimping the joint end faces of both objects to be joined to each joint surface of the binder Becomes flat, and the joint end surface of the body to be joined and the joint surface of the binder come into close contact with each other and are firmly joined. Therefore, it is possible to extremely easily and surely join the objects to be joined, such as the water blocking plate, by using the instant adhesive without using the heater mold which is heavy and complicated in operation as in the conventional case.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a binder used in the joining method of the present invention, in which (a) is a front view and (b) is a side view.

FIG. 2 is a perspective view showing a method of joining water blocking materials using a binder.

FIG. 3 is a diagram showing a cross-sectional shape of a ridge formed on a binder.

FIG. 4 is a perspective view showing a method of testing a difference in adhesive force depending on the presence or absence of a ridge on a binder.

FIG. 5 is a perspective view showing a conventional method for vulcanizing and joining a water blocking plate with a mold.

[Explanation of symbols]

 1 Binder 2, 3 Water stop plate 4, 5 Bonding surface 6 Projection

Claims (3)

(57) [Claims] 1. A joint surface to be joined to one body to be joined and a joint surface to be joined to the other body to be joined, each joint surface extending from one side to the other side. Prepare a binder made of soft rubber or synthetic resin on which ridges are formed, apply instantaneous adhesive to each joint surface with the binder positioned so that the ridges are horizontal, and then bond A method for joining elastic bodies or the like, characterized in that the respective joint end surfaces of both bodies to be joined are pressure-bonded to the respective joint surfaces of the binder. 2. A joint surface with one to-be-joined body to be joined and a joint surface with the other to-be-joined body to be joined, and each joint surface extends from one side to the other side. other ridges are shaped in a direction intersecting with Rutotomoni projecting strip protrusion is formed
A binder made of soft rubber or synthetic resin characterized by being made . 3. A projecting strip height 0.1 to 0.5 mm, according to claim 2 Symbol mounting of the binder, characterized in that it is formed in the vertical direction pitch 0.5 to 2.0 mm.