JP2002059070A - Extruder of heat-melt-type swelling tacky agent and seal method with heat-melt-type swelling tacky agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extruder and a seal method which can easily and safely perform accurate water shut-off operation continuously in such a way that an operator holding in his hand the extruder of a heat-melt swelling tacky agent can seal parts to be sealed freely while travelling over the parts to be sealed in a work field. SOLUTION: The method is characterized in that a cartridge containing a heat-melt-swelling tacky agent inside is inserted into a preheat-adaptor and the heat-melt-swelling tacky agent in the cartridge is heated at such a temperature that the sticking state may be maintained, and then the above cartridge is subjected to put on a gun-type extruder, the swelling tacky agent is extruded through the nozzle of the extruder by the gun-type extruder, and the swelling- tacky agent is applied on the parts to be sealed, resulting in a water shut-off processing of the parts to be sealed with the heat-type-swelling tacky agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a sealing method for waterproofing various building structures and the like, which are solid at ordinary temperature, become liquid or viscous when heated, and come into contact with water. Then, there is provided an apparatus and a sealing method for applying a hot-melt type swellable adhesive having a property of absorbing and expanding water to a portion to be sealed to perform a water stopping process.

[0002]

2. Description of the Related Art Conventionally, as a heat-melt type swellable pressure-sensitive adhesive, a water-swellable hot-melt type pressure-sensitive adhesive, such as a water-swellable hot-melt type pre-sealing material described in JP-A-9-176618, has been proposed. There is a mixture of resins. This heat-melt type swellable pressure-sensitive adhesive is solid at room temperature, and is heated in advance and used in a molten state during molding.

Further, an applicator for discharging the swellable pressure-sensitive adhesive is arranged in a workplace provided with a power supply, and the heat-melt type swellable pressure-sensitive adhesive is supplied by electricity supplied into the workplace. Suitable for continuous work such as lap joints of external wall materials at a specific place in the workplace because the swellable adhesive is heated and melted and the molten state is maintained for a long time. However, the above-mentioned applicator has a large device itself and is not one that can be freely carried and used by a worker at a construction site, a civil engineering site, or the like.

Accordingly, in the case of a joint between secondary products made of steel, concrete, synthetic resin, etc., which is mentioned as a water stopping operation of a building structure on site, a solvent type sealing material is applied with a firearm type extruder. In addition, a solid sealing material formed into a strip, a sheet, or an annular shape by extrusion molding is bonded and sealed with an adhesive.
At the joint between the next product and the concrete to be cast, the sealing material by the extrusion molding is interposed.

[0005]

However, in the case of the above-mentioned solvent-type sealing material, there are problems that the solvent that evaporates during drying has a bad effect on the human body, and there is a risk that a volatile substance may catch fire and cause a fire. Was.

In addition, a solid swellable sealing material formed by extrusion, such as a band, a sheet, or a ring, requires a large amount of labor in addition to the work and is complicated since the sealing material is bonded to the portion to be sealed with an adhesive. Since the seal at a bad place is inferior in adhesion to the portion to be sealed and the sealing material is broken, skill is required for the bonding operation.

[0007]

SUMMARY OF THE INVENTION The present invention solves the problems of a conventional extruding apparatus and a sealing method for this type of swellable hot-melt pressure-sensitive adhesive. An object of the present invention is to provide an extruding apparatus and a sealing method that can easily and safely seal each sealed portion while freely moving, and can continuously perform an accurate water stopping process.

[0008] The present invention, as a specific means for that,
A cartridge provided with a heat-meltable swellable adhesive inside, a preheating adapter for heating to a temperature at which the adhesive state of the swellable adhesive in the cartridge can be maintained, and a cartridge taken out from the preheating adapter in a cylinder. The apparatus is characterized in that the apparatus comprises a firearm type extruder for mounting and extruding a swellable pressure-sensitive adhesive from a nozzle and applying the swellable adhesive to a portion to be sealed.

The heat-melt type swellable pressure-sensitive adhesive is preferably a mixture containing, as main components, a butyl rubber and a synthetic resin polymer which are melted by heating, and a water-swellable synthetic resin.

[0010] The firearm type extruder has a cylinder having a semicircular section which can be opened and closed by dividing a cylinder having a heater in a layer along a longitudinal direction into two parts.
At the front end of the cylinder, a nozzle heating section having a heater inside the layer is provided, and at the rear end of the cylinder, a drive section for advancing the push rod is provided, and a motor and a switch for transmitting a rotational force to the drive section are provided. It is preferable that the holder is provided with a holder.

The preheating adapter has a plurality of cartridge insertion holes, and a heating heater disposed around each of the insertion holes, and a cartridge in the hole is preheated to a predetermined temperature at the opening of each insertion hole. And a notification lamp for notifying the user that the operation is in progress.

A cartridge provided with a heat-melt type swellable adhesive inside is inserted into a preheating adapter and heated to a temperature at which the adhesive state of the swellable adhesive in the cartridge can be maintained, and then the cartridge is extruded with a firearm type. The swellable adhesive in the cartridge is extruded from the nozzle of the extruder by this firearm type extruder, and the swellable adhesive is applied to the portion to be sealed. It is characterized by a sealing method in which sealing is performed with a water stop treatment.

The sealed portion to which the heat-melt type swellable adhesive is applied is made of steel, concrete, synthetic resin or the like.
It may be a joint of the next product to each other.

The sealed portion to which the heat-melt type swellable adhesive is applied is made of steel, concrete, synthetic resin, or the like.
It is good to be the joint between the next product and the cast concrete.

The sealed portion to which the heat-melt type swellable adhesive is applied is preferably a member buried with cast concrete.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an apparatus for extruding a hot-melt type swellable pressure-sensitive adhesive according to the present invention. Is, as shown in FIGS. 1 to 3,
A cartridge 2 provided with a heat-melt type swellable pressure-sensitive adhesive 1 therein; and a preheating adapter 3 for heating the cartridge 2 to a temperature at which the pressure-sensitive adhesive state of the swellable pressure-sensitive adhesive 1 can be maintained.
And a gun type extruder 4 for extruding the swellable pressure-sensitive adhesive 1 in the cartridge 2 taken out of the preheating adapter 3 from the nozzle 5 and applying it to the sealed portion.

The swellable pressure-sensitive adhesive 1 comprises a heat-melt type butyl rubber and a pressure-sensitive adhesive mainly composed of a synthetic resin polymer;
It is a mixture with a polyester-based swellable resin having the property of absorbing water and expanding when it comes in contact with water.

As shown in FIG. 2, the swellable pressure-sensitive adhesive 1 has an unfilled portion at one end of a tube-shaped resin pack 8 made of a tough flexible heat-resistant synthetic resin such as a polyamide synthetic resin. And both ends of the resin pack 8 are sealed with a tool 9 such as an aluminum wire. The unfilled one end side of the resin pack 8 is cut at the time of use to become a discharge section 7 for discharging the swellable adhesive 1.

Further, the resin pack 8 enclosing the swellable pressure-sensitive adhesive 1 is inserted into a durable metal cylindrical cartridge 2 having good thermal conductivity such as aluminum and brass. By inserting the agent 1 into the cartridge 2 via the resin pack 8, the swellable adhesive 1 does not come into direct contact with the inner peripheral surface of the cartridge 2, so that the cartridge 2 is not stained, and therefore, the cartridge 2 is used repeatedly. It is economical because it can be done, and the amount of waste generated can be reduced.

Then, the cartridge 2 in which the resin pack 8 is inserted is housed in the cartridge insertion hole 10 of the preheating adapter 3 with the discharge portion 7 facing upward as shown in FIG. 3, and the swellable adhesive 1 can be extruded. About 170 ° melted to viscosity
Heat to C. The preheating adapter 3 is provided with a plurality of cartridge insertion holes 10, a heater 11 is disposed around each of the insertion holes 10, and the cartridge 2 is heated at the opening of each of the insertion holes 10 so that a predetermined amount of the cartridge 2 is heated. A notification lamp 12 that lights up when the temperature is reached is provided. The power supply method for the preheating adapter 3 is as follows.
It may be connected to an external power supply or by a battery.

On the other hand, as shown in FIGS. 1 and 4, a firearm type extruder 4 includes a cylinder 13, a nozzle heating section 14 provided at the front end of the cylinder 13, and a cylinder 13.
A drive unit 16 for advancing an extrusion rod 15 provided at a rear end of the motor, and a motor 1 for transmitting a rotational force to the drive unit 16
It is a hand-held type which is composed of a holder 7 having a switch 7 and a switch 18 and which can be freely operated by an operator by hand.

The cylinder 13 has a semi-cylindrical main body member 20 having a tubular body divided into two parts so as to be openable and closable, and a lid member 2.
1, each of which includes a heater 22 for heating the swellable pressure-sensitive adhesive 1 in a layer having a cross section. Also,
The nozzle heating section 14 provided at the front end of the cylinder 13 has a heater 23 disposed in the layer of the cross section, and the nozzle 5 is provided at the tip thereof, and the heaters 22 and 23 melt the swellable adhesive 1. The state can be maintained.

Next, the sealing method using the hot-melt type swellable pressure-sensitive adhesive 1 will be described. As shown in FIGS. 5A and 5B, the joints 25 of the secondary products 24 such as concrete blocks and sheet piles are stopped. In the case of performing water treatment, the molten swellable pressure-sensitive adhesive 1 is extruded from the nozzle 5 of the extruder 4 onto the sealed portion 6 at the edge of the joint 25 of the secondary product 24, applied, and sealed.

In this case, when the outside air temperature is low, such as in winter, the temperature of the swellable pressure-sensitive adhesive 1 mounted in the extruder 4 decreases and solidifies easily. Connected to the heater 22 of the cylinder 13
By heating the heater 23 of the nozzle heating unit 14 and maintaining the swellable pressure-sensitive adhesive 1 in a molten state, the swellable pressure-sensitive adhesive 1 can be continuously applied to the sealed portion 6.

If the work is performed in a place where the power supply cannot be connected to the extruder 4 and the temperature of the swellable pressure-sensitive adhesive 1 in the cartridge 2 decreases and solidifies, the swellable pressure-sensitive adhesive 1 Is replaced with the one heated and held in the preheating adapter 3 to continue the operation, and the swellable pressure-sensitive adhesive 1 solidified during use can be returned to the preheating adapter 3 and heated to be used again. Therefore, there is no stagnation of work.

The secondary product 24 thus sealed
The state of the joints 25 is generally fitted or joined by an adhesive such as mortar. Since the joints 25 do not have a water stopping function, water permeates the gaps of the joints 25. The swellable pressure-sensitive adhesive 1 applied to the sealed portion 6 of the joint 25 prevents water from penetrating, and furthermore, the water-swellable pressure-sensitive adhesive 1 absorbs and expands, so that the water stopping effect is further improved. Become.

The method of sealing the secondary product 24 is as follows.
The present invention is also applicable to a joint of a concrete segment and a joint between a secondary concrete product and plastic or steel.

On the other hand, when the sealed portion 6 to which the heat-melt type swellable pressure-sensitive adhesive 1 is applied is a joint portion 27 between a secondary product 24 made of steel, concrete, synthetic resin or the like and a cast concrete 26. As shown in FIGS. 6A and 6B, a swellable adhesive 1 is applied in a strip shape to a predetermined peripheral surface of a secondary product 24 such as a steel column or a steel pipe, and a primer is formed. By blocking the gap between the cast concrete 26 and the secondary product 24 generated by the shrinkage of the concrete 26 at the time of hardening, the penetration of water from the gap is prevented, and the water is swelled with adhesive. Since the agent 1 absorbs and expands, the water stopping effect is further improved.

Further, the swelling adhesive 1
Is applied to the portion 6 to be sealed, so that a primer having a complicated shape such as the H-section steel can be formed extremely efficiently.

Further, by such a method, 2
By allowing the swelling adhesive 1 to be applied to the peripheral surface of the next product 24, it is easier to apply the swelling adhesive 1 to the secondary product 24 in a factory, etc. Since there is no problem, the construction management becomes easy, and even when the place where the swelling adhesive 1 is applied is not uniform, it can be easily dealt with.

The secondary product 24 and the concrete 2
The method of sealing the joint 27 with the 6 can also be applied to the adjustment of the unevenness of the concrete at the time of attaching the water blocking plate, the joint between the decorative material such as a stone material and the cast concrete.

FIG. 7A shows that when the concrete 28 is to be transferred onto the previously cast concrete 26, the swellable adhesive 1 is applied in a strip shape on the upper surface of the previously cast concrete 26. By doing so, even if cracks or voids are formed in the joints 29 of the concretes 26 and 28 and water permeates, it can be prevented by the swellable adhesive 1.

Further, FIG. 7B shows that a buried member 30 such as a lath is provided on the side surface of the concrete 26 as a joining member.
In the construction method in which the concrete 28 is transferred adjacent to the concrete 26, the swellable adhesive 1 is applied to the buried member 30 in the horizontal direction, and the buried member 30 and the concrete 26 are applied.
In this case, water that penetrates from the junction with the block 28 is prevented.

In addition, concrete 26 and buried object 30
As shown in FIG. 7 (c), a method of sealing the joint portion is to apply a swelling adhesive 1 to a predetermined portion of an embedding member 30 such as a reinforcing bar, and to perform a water stop process on the embedding material 30, thereby embedding the embedding material. Since water that penetrates along the object 30 can be prevented and the diffusion of corrosion of the buried object 30 can be prevented, it is effective as a countermeasure against salt damage in the beach area. In addition, this sealing method, the separator of the mold,
It can also be applied to PC steel rods, sheaths and the like.

[0035]

As described above, the apparatus for extruding a swellable pressure-sensitive adhesive according to the present invention absorbs water when it comes into contact with butyl-based rubber and synthetic resin polymer of a heat-melt type. A swelling adhesive consisting of a mixture mainly composed of a polyester-based swelling resin that expands is inserted into a cartridge, and this cartridge is attached to a hand-held fire extruder. Since it is possible to apply a highly water-swellable pressure-sensitive adhesive to the sealed portion by carrying it around, and since the extruder and the preheating adapter are equipped with a heating heater, it is possible to use a swellable pressure-sensitive adhesive that always maintains a molten state, There is an advantage that an accurate and easy water stopping process can be performed easily and efficiently.

The swellable pressure-sensitive adhesive is a solid at room temperature and is a thermoplastic pressure-sensitive adhesive that melts when heated. Therefore, unlike a solvent-type pressure-sensitive adhesive, the volatilization of a solvent may cause adverse effects on the human body and a risk of fire. It is highly safe without any properties.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of an apparatus for extruding a swellable pressure-sensitive adhesive of the present invention.

FIG. 2 is a sectional view of a cylinder in which a resin pack is inserted.

FIG. 3 is a perspective view showing a configuration of a preheating adapter.

FIG. 4 is an explanatory view showing a cylinder portion of the extruder.

FIG. 5 is an explanatory view showing a state in which a swellable pressure-sensitive adhesive is used for a joint portion of a secondary product.

FIG. 6 is an explanatory view showing a state in which a swellable pressure-sensitive adhesive is used for a joint between a secondary product and concrete.

FIG. 7 is an explanatory view showing a state in which a swellable pressure-sensitive adhesive is used for a concrete embedding member.

[Explanation of symbols]

 Reference Signs List 1 swellable adhesive, 2 cartridge, 3 preheating adapter, 4 extruder, 5 nozzle, 6 sealed part, 7 discharge guide part, 8 resin pack, 9 rigging, 10 cartridge insertion hole, 11 heating heater, 12 notification lamp , 13 cylinder, 14 nozzle heating section, 15 rod, 16 drive section, 17 motor, 18 switch, 19 holder, 20 body member, 21 lid member, 22 heating heater, 23 heating heater, 24 secondary product, 25 joint section, 26 concrete, 27 joints, 28 concrete, 29 joints, 30 buried members,

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) E04G 21/02 103 E04G 21/16 4F042 21/16 B65D 83/00 DF term (reference) 2E172 DB05 DB13 DD06 2E174 DA14 DA15 DA31 2E177 KD09 3E014 KA05 4F041 AA08 AA17 AA19 AB01 CB02 CB34 CB54 4F042 AA16 AA28 AA30 FA22 FA30 FA36

Claims (8)

[Claims] 1. A cartridge provided with a heat-melt type swellable pressure-sensitive adhesive inside, a preheating adapter for heating to a temperature at which the swellable pressure-sensitive adhesive in the cartridge can be maintained in an adhesive state, and removed from the preheating adapter. An extruder for a hot-melt type swellable pressure-sensitive adhesive comprising a firearm type extruder for mounting a cartridge in a cylinder, extruding the swellable pressure-sensitive adhesive from a nozzle, and applying the swellable pressure-sensitive adhesive to a sealed portion. 2. The heat-melt type swellable pressure-sensitive adhesive according to claim 1, wherein the heat-melt type swellable pressure-sensitive adhesive is a mixture containing, as main components, a butyl rubber and a synthetic resin polymer melted by heating and a water-swellable synthetic resin. Extruder for swellable adhesive. 3. A firearm type extruder, wherein a cylinder is formed of a semi-circular member which can be opened and closed by dividing a cylinder having a heater in a layer along a length direction into two.
At the front end of the cylinder, a nozzle heating section having a heater inside the layer is provided, and at the rear end of the cylinder, a drive section for advancing the push rod is provided, and a motor and a switch for transmitting a rotational force to the drive section are provided. The apparatus for extruding a hot-melt type swellable pressure-sensitive adhesive according to claim 1 or 2, further comprising a holder provided. 4. The preheating adapter has a plurality of cartridge insertion holes, a heating heater disposed around each of the insertion holes, and a cartridge in the hole at a predetermined temperature at an opening of each insertion hole. 4. The apparatus for extruding a heat-melt type swellable pressure-sensitive adhesive according to claim 1, further comprising a notification lamp for notifying that the pre-heating is performed. 5. A cartridge provided with a heat-melt type swellable adhesive inside, inserted into a preheating adapter and heated to a temperature at which the adhesive state of the swellable adhesive in the cartridge can be maintained, and then the cartridge is fired. The swellable pressure-sensitive adhesive in the cartridge is extruded from the nozzle of the extruder by using the fired-type extruder attached to the die extruder, and the swellable pressure-sensitive adhesive is applied to the portion to be sealed, thereby swelling the portion to be sealed. A sealing method using a heat-melt swellable pressure-sensitive adhesive which is subjected to a water stop treatment with the pressure-sensitive adhesive. 6. The sealed portion to which the heat-melt type swellable adhesive is applied is made of steel, concrete, synthetic resin or the like.
The sealing method using a heat-melt type swellable pressure-sensitive adhesive according to claim 5, which is a joint between the next products. 7. The sealed portion to which the heat-melt type swellable adhesive is applied is made of steel, concrete, synthetic resin or the like.
The sealing method using a hot-melt type swellable pressure-sensitive adhesive according to claim 5, which is a joint between the next product and cast concrete. 8. The sealing method according to claim 5, wherein the portion to be sealed to which the hot-melt swellable adhesive is applied is a member buried with cast concrete.