JP4844160B2 - Kitchen counter - Google Patents

Description

  The present invention relates to a kitchen counter formed by attaching a sink to a back surface of a counter in which an opening is formed so as to coincide with the opening.

  A counter formed of a resin such as artificial marble is widely used as a counter for forming the top plate of the kitchen apparatus. The counter is provided with an opening at a portion where the sink is attached, and a stainless steel sink is fixed to the back surface of the counter so as to coincide with the opening, thereby producing a kitchen counter. Specifically, a flange provided at the upper end of the sink is disposed on the outer periphery of the opening on the back surface of the counter, and the sink is attached to the counter with an adhesive. As the adhesive, a reaction curable adhesive such as a urethane-based adhesive having high hardness is generally used, and the counter and the sink are firmly bonded.

  In recent years, due to increasing environmental problems, demands for resource conservation, and enactment of the Law for Promotion of Effective Use of Resources, kitchen counters are also required to use resources effectively by recycling. At the time of disposal, it is necessary to separate and dismantle the counter and sink formed from different materials. However, conventional kitchen counters are very difficult to separate and disassemble because the counter and the sink are firmly bonded as described above.

  Therefore, for example, it is considered to mix a heat foaming material that foams by heat into the adhesive and separate the counter and the sink by heating. However, since the reaction curable adhesive has a high hardness, there is a problem that a large amount of thermally foamable material needs to be mixed in the adhesive in order to foam the adhesive. In addition, due to the mixing of a large amount of the heat-foaming material, the cohesive force of the adhesive is reduced, sufficient adhesiveness cannot be obtained, and the sink may come off in a normal use environment.

  In order to facilitate heat separation, it is conceivable to change the adhesive itself to an elastic resin adhesive such as a modified silicone resin, and to mix a thermal foam material into the adhesive (Patent Document). 1) In this case as well, the cohesive force of the adhesive becomes small, and the possibility that the sink will come off under normal use environment cannot be denied.

Moreover, in the kitchen counter described in Patent Document 1, a sealing material is interposed between the back surface of the counter and the flange of the sink in order to prevent water leakage due to water intrusion during use and to provide sealing properties. ing. For this reason, the production of the kitchen counter requires two steps of disposing a sealing material and applying an adhesive, and simplification of the steps is desired.
JP 2003-61771 A

  The present invention has been made in view of such circumstances. While sufficient adhesiveness is obtained in a normal use environment, the counter and the sink can be easily separated by heating, and the sealing property is improved. It is an issue to provide a kitchen counter that enables the granting and separation and dismantling in one step.

In order to solve the above-described problems, the present invention firstly, in a kitchen counter formed by attaching a sink to the back surface of the counter in which the opening is formed so as to coincide with the opening, on the back surface of the counter A recess is formed along the outer peripheral edge of the opening, and the heating separation primer is applied in the recess so as to be slightly inside the outer end of the recess, and the flange provided on the upper end of the sink is polymerized to the heating separation primer. The reaction curable adhesive is characterized in that a part of the reaction curable adhesive penetrates into the recess and the sink is bonded to the counter.

  Secondly, the present invention is characterized in that the heat separating primer is obtained by dispersing thermally expandable microballoons in an elastic resin adhesive.

  Thirdly, in the present invention, a wooden reinforcing material is disposed on the left and right sides of the counter on the back side close to the opening, and the sink fixing bracket for connecting the sink flange to the wooden reinforcing material is detachably attached. It is characterized by.

  According to the first invention of the present application, since the counter and the sink are bonded by the reaction curing type adhesive, sufficient adhesiveness is obtained in a normal use environment, and there is no possibility that the sink is detached. In addition, since a heating separation primer is interposed between the back of the counter and the flange at the top of the sink, the volume of the heating separation primer expands when the kitchen counter is heated at the time of disposal, and can be separated and disassembled into the counter and the sink. it can. Furthermore, since the heat separation primer is applied in a recess formed on the back surface of the counter along the outer peripheral edge of the opening, the heat separation primer is crushed by polymerization of the flange at the upper end of the sink, and remains in the recess. The flange adheres closely to the heat separation primer without forming a gap. For this reason, sufficient sealing performance can be obtained without separately providing a sealing material. Water does not enter during use, preventing leakage. It also makes it difficult to collect trash.

  Furthermore, the application of the heat-separating primer in the recess and the polymerization of the flange to the heat-separating primer makes it possible to impart sealing properties and realize separation and disassembly in one step. The kitchen counter manufacturing process is simplified. Since the heat separation primer is applied in the recess, when the sink is attached, the heat separation primer does not protrude from the opening formed on the counter, and a good appearance is obtained.

  According to the second invention of the present application, by using the elastic resin adhesive, the sealing property and the adhesive durability of the bonded portion between the counter and the sink are improved, and the flexibility is secured by heating when the kitchen counter is discarded. be able to. A heat-expandable microballoon is added to such an elastic resin adhesive, and the dispersed heat-separated primer is greatly expanded in volume when heated to the expansion temperature of the heat-expandable microballoon, and the counter and sink are heated. Ensure separation.

  According to the third invention of the present application, the sink fixing bracket increases the attachment strength of the sink, and the sink fixing bracket is detachable, so that the separation between the counter and the sink is not hindered.

  FIG. 1 is a plan view of an essential part showing an embodiment of a kitchen counter of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB.

  The kitchen counter is formed of an artificial marble counter 1 and a stainless steel sink 3 fixed to the back surface of the counter 1 so as to coincide with the opening 2 formed in the counter 1. The front edge of the counter 1 hangs down, a front drooping portion 4 is formed, the rear end rises, and a back guard 5 is formed. On the back surface of the counter 1, wood reinforcing materials 6 are arranged at both front and rear ends. The wood reinforcing material 6 at the front end is arranged inside along the front hanging portion 4 of the counter 1, and the wood reinforcing material 6 at the rear end is arranged along the back guard 5. These wooden reinforcements 6 are attached to the back surface of the counter 1 with an adhesive. On the back surface of the counter 1, a wood reinforcing material 7 is disposed on both the left and right sides of the opening 2 in the vicinity of the opening 2. The wood reinforcing material 7, together with the wood reinforcing material 6, surrounds the outer periphery of the opening 2 squarely on the back surface of the counter 1. A wood reinforcing material 7 is also attached to the back surface of the counter 1 with an adhesive. The counter 1 is reinforced by the arrangement of the wood reinforcing members 6 and 7.

  The sink 3 has a flange 8 extending outward at the upper end, and the flange 8 is disposed inside a section surrounded by the wood reinforcement members 6 and 7.

  As shown in FIGS. 2 and 3, a recess 9 is formed on the back surface of the counter 1 along the outer peripheral edge of the opening 2. The depth of the concave portion 9 can be appropriately changed depending on the thickness of the counter 1, and can be, for example, about 2 mm. A heating separation primer 10 is applied to the recess 9. The flange 8 at the upper end of the sink 3 is superposed on the heat separating primer 10. The sink 3 is attached to the back surface of the counter 1 by the reaction-curing adhesive 11 injected between the wall 3a and the inner end surfaces of the wood reinforcements 6 and 7 in a state where the flange 8 is superposed on the heat separating primer 10. It is glued.

  The heating separation primer 10 expands by heating, and enables the counter 1 and the sink 3 to be separated. Further, the heat separation primer 10 is also in close contact with the flange 8 of the sink 3 and enables sealing. For such a heat separating primer 10, for example, an elastic resin adhesive such as a one-component modified silicone resin can be used, and a thermally expandable microballoon is dispersed in the elastic resin adhesive. Is exemplified. By using an elastic resin adhesive, the sealing property and adhesion durability of the bonded portion between the counter 1 and the sink 3 are improved, and flexibility can be secured by heating when the kitchen counter is discarded. As the heat-expandable microballoon, one that expands at 150 to 180 ° C. is suitable. For example, one in which liquefied hydrocarbon is enclosed in an acrylic resin shell is exemplified. The addition amount to the elastic resin adhesive is suitably 5 to 15% by weight. In this addition range, the heated separation primer 10 can be expanded to an initial volume of 200 to 300% by heating to the expansion temperature. It is. Ensure that the counter 1 and the sink 3 are separated. The heat separating primer 10 can be applied in the concave portion 9 in a bead shape, for example.

  The heat separating primer 10 can also be used for bonding the wood reinforcing materials 6 and 7 disposed on the back surface of the counter 1. By applying the heating separation primer 10, the wood reinforcing materials 6 and 7 which are different materials can be separated from the counter 1 and disassembled by heating the kitchen counter at the time of disposal.

  As the reaction curable adhesive 11, a two-component thermosetting urethane adhesive that has been used for bonding the counter 1 and the sink 3 can be used as usual.

  In the present embodiment, since the counter 1 and the sink 3 are bonded by the reaction curable adhesive 11, sufficient adhesiveness is obtained in a normal use environment, and the sink 3 is not likely to come off. Further, since the heating separation primer 10 is interposed between the back surface of the counter 1 and the flange 8 at the upper end of the sink 3, the volume of the heating separation primer 10 expands by heating the kitchen counter at the time of disposal. 3 can be separated and disassembled. Furthermore, since the heat separating primer 10 is applied in the concave portion 9 formed along the outer peripheral edge of the opening 2 on the back surface of the counter 1, the heat separating primer 10 is crushed and concaved by polymerizing the flange 8. 9 stays within 9 and the flange 8 adheres to the heat separating primer 10 without forming a gap. For this reason, it is possible to seal between the counter 1 and the sink 3 without separately providing a sealing material. Water does not enter during use, preventing leakage. It also makes it difficult to collect trash.

  Furthermore, the application of the heat separating primer 10 in the recess 9 and the polymerization of the flange 8 on the heat separating primer 10 can provide sealing properties and realize separation and disassembly in one step. The kitchen counter manufacturing process is simplified. Since the heat separation primer 10 is applied in the recess 9, the heat separation primer 10 does not protrude from the opening 2 side of the counter 1 when the sink 3 is attached, and a good appearance is obtained.

  The heating separation primer 10 that is crushed when the flange 8 is polymerized and remains in the recess 9 does not spread over the entire area of the recess 9 as shown in FIGS. 2 and 3, but from the outer end of the recess 9. It is preferable to keep it slightly inside. By doing so, a part of the reaction curable adhesive 11 can enter the recess 9, and the adhesion between the counter 1 and the sink 3 becomes more sufficient. Thus, even if the reaction curable adhesive 11 partially penetrates into the recess 9, the heating separation primer 10 exists in most of the recess 9. Therefore, the counter 1 and the sink 3 can be heated by heating the kitchen counter at the time of disposal. Separated sufficiently.

  Further, in the present embodiment, as shown in FIGS. 1 and 3, the sink 3 is attached to the wood reinforcing material 7 disposed in the vicinity of the left and right sides of the opening 2 on the back surface of the counter 1. Are linked by. The sink fixing bracket 12 can have, for example, a substantially L-shaped cross section, and one end portion can be connected to the flange 8 of the sink 3 by bonding, welding, or the like. The other end portion is disposed in contact with the back surface of the wooden reinforcement member 7 and can be connected to the wooden reinforcement member 7 using screws 13. By connecting the sink 3 and the wood reinforcing material 7 using such a sink fixing bracket 12, the mounting strength of the sink 3 in the kitchen counter is improved. As shown in FIG. 3, the portion of the wood reinforcing material 7 to which the sink fixing bracket 12 is connected can be cut out by the thickness of the sink fixing bracket 12.

  Since the sink fixing metal 12 is connected to the wood reinforcing material 7 by a screw 13, it can be removed by loosening the screw 13, and does not hinder the separation and disassembly of the counter 1 and the sink 3 at the time of disposal.

  Actually, the kitchen counter shown in FIGS. 1 to 3 was manufactured and evaluated for recyclability.

  The kitchen counter was put into an electric dryer set at 195 ° C., and after the inside of the dryer reached 180 ° C. (approximately 15 minutes during this period), it was left for 15 minutes. Then, the kitchen counter was taken out from the dryer and allowed to stand at room temperature, and then separated and disassembled using jigs such as a bar, screwdriver, and hammer. The counter and the sink could be separated, and the time required was 4.5 minutes.

  For comparison, the same evaluation was performed on a kitchen counter using a modified silicone resin instead of a heated separation primer, but the artificial marble around the sink could not be removed, and the counter and the sink were separated. could not.

  Moreover, the attachment strength reliability of the sink in the kitchen counter shown in FIGS. 1 to 3 was evaluated. The results are as shown in Table 1.

漏水、剥離などは生じず、取付強度信頼性の高いキッチンカウンターであることが確認された。

It was confirmed that this was a kitchen counter with high mounting strength reliability without water leakage or peeling.

It is the principal part top view which showed one Embodiment of the kitchen counter of this invention. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Counter 2 Opening part 3 Sink 3a Wall part 4 Front drooping part 5 Back guard 6, 7 Wood reinforcement material 8 Flange 9 Recessed part 10 Heating separation primer 11 Reaction hardening type adhesive 12 Sink fixing metal fitting 13 Screw

Claims (3)

In a kitchen counter formed by attaching a sink to the back surface of the counter in which the opening is formed, a recess is formed on the back surface of the counter along the outer peripheral edge of the opening. A part of this reaction curable adhesive is applied by a reaction curable adhesive by polymerizing the heat separation primer on the heat separation primer by applying the heat separation primer to the inner side of the recess and slightly inside the outer end. The kitchen counter is characterized in that the sink enters the recess and the sink is bonded to the counter.   The kitchen counter according to claim 1, wherein the heat separation primer is obtained by dispersing thermally expandable microballoons in an elastic resin adhesive.   3. A kitchen counter according to claim 1 or 2, wherein a wooden reinforcing material is disposed on the left and right sides of the counter on the left and right adjacent to the opening, and a sink fixing bracket for connecting the flange of the sink to the wooden reinforcing material is detachably attached. .

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