JP2014180479A - Lavatory seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lavatory seat in which a toilet seat upper plate and a toilet seat lower plate can be easily joined.SOLUTION: In a lavatory seat 1, a hollow part 6 for storing a heater 3 is formed between an upper plate 2 and a lower plate 5, and the upper plate 2 and the lower plate 5 are formed by being joined by vibration welding. Each of the upper plate 2 and the lower plate 5 has welding ribs 21, 22, 5a, and 5b to be welded in the vibration welding to weld each other. A seat surface 2a of the upper plate 2 is formed of a soft material, the welding ribs 21 and 22 in the upper plate 2 are formed of a hard material, and the lower plate 5 is formed of a hard material.

Description

  The present invention relates to a toilet seat, and more particularly, to a toilet seat formed by joining a toilet seat upper plate and a toilet seat lower plate by vibration welding.

  2. Description of the Related Art Conventionally, warm toilet flush toilet seats have been proposed that use a soft toilet seat material to improve sitting comfort (see Patent Document 1). Patent Document 1 discloses a toilet seat provided with a seat surface member made of a soft material such as a thermoplastic elastomer.

  Conventionally, there has been known a warm water washing toilet seat provided with a hollow portion for providing a heater or the like for heating the toilet seat between the toilet seat upper plate and the toilet seat lower plate. In such a warm water washing toilet seat, since a heater or the like is provided in the hollow portion, the toilet seat upper plate and the toilet seat lower plate cannot be integrally formed. Therefore, the toilet seat upper plate and the toilet seat lower plate are welded and joined using a welding method such as a vibration welding method, an ultrasonic welding method, or a laser welding method (see Patent Document 2).

  Patent Document 2 uses friction heat generated between welding ribs formed on both plates by a vibration welding method in which vibrations using ultrasonic waves or low frequencies are applied to the toilet seat upper plate and the toilet seat lower plate, A technique for welding and joining both plates is disclosed.

Japanese Utility Model Publication No. 7-14997 Japanese Patent Laid-Open No. 10-165331

  However, in the technique disclosed in Patent Document 2, for example, both the toilet seat upper plate and the toilet seat lower plate are formed of a synthetic resin that is a soft material. Therefore, when the two plates are welded, the toilet seat upper plate follows the vibration of the welding ribs, so that frictional heat is hardly generated, and it is difficult to join the toilet seat upper plate and the toilet seat lower plate.

  This invention is made | formed in view of the above situations, Comprising: It aims at providing the toilet seat which can join a toilet seat upper board and a toilet seat lower board easily.

  The toilet seat according to the present invention is a toilet seat formed by forming a hollow portion in which a heater is accommodated between an upper plate and a lower plate, and joining the upper plate and the lower plate by vibration welding, Each of the upper plate and the lower plate has welding ribs that are welded when vibration welding each other, the seating surface of the upper plate is formed of a soft material, and the welding ribs of the upper plate are It is formed of a hard material, and the lower plate is formed of a hard material. Since the welding ribs of the upper plate and the lower plate are formed of a hard material in this way, when the upper plate and the lower plate are vibration welded, the surface where the welding rib of the upper plate and the welding rib of the lower plate are in contact with each other Then, frictional heat is generated efficiently. Therefore, even if the seating surface of the upper plate is formed of a soft material in order to improve the user's sitting comfort, the upper plate and the lower plate can be easily joined by vibration welding.

  Moreover, in the toilet seat which concerns on this invention, Preferably, the length of the vertical direction of the welding rib which the said upper board has is longer on the inner peripheral side than the outer peripheral side, It is characterized by the above-mentioned. Thereby, when a user sits on a toilet bowl, it can suppress that an upper board deform | transforms into an inner peripheral side too much and a collar part falls into an inner peripheral side.

  In the toilet seat according to the present invention, preferably, the lower plate is formed with a thin butted portion outside the welding rib of the lower plate, and the upper plate has an upper surface of the butted portion. A polymerization allowance for polymerization is formed on the mating surfaces. Thus, since the butted portion of the lower plate is formed of a hard material, and the polymerization allowance of the upper plate is formed of a soft material, even when the upper plate and the lower plate are welded by vibration welding, The butted portion of the lower plate and the polymerization allowance of the upper plate are not easily welded. Therefore, the butted portion of the lower plate and the polymerization allowance of the upper plate can be brought into close contact with each other. Thereby, the burr | flash which generate | occur | produces between welding ribs by vibration welding can be effectively hidden.

  According to the present invention, the toilet seat upper plate and the toilet seat lower plate can be easily joined.

It is a perspective view showing an outline of a warm water washing toilet seat concerning one embodiment of the present invention. It is a figure which shows the structural example of the warm water washing toilet seat which concerns on one Embodiment of this invention. It is sectional drawing of the warm water washing toilet seat which concerns on one Embodiment of this invention. It is an enlarged view which shows the welding part by the side of the ball | bowl part of a toilet bowl main body in the warm water washing toilet seat which concerns on one Embodiment of this invention. It is an enlarged view which shows the welding part of the outer side of a toilet bowl main body in the warm water washing toilet seat which concerns on one Embodiment of this invention. It is sectional drawing which shows the modification of the warm water washing toilet seat which concerns on one Embodiment of this invention. It is an enlarged view which shows the modification of the welding part by the side of the ball | bowl part of a toilet bowl main body in the warm water washing toilet seat which concerns on one Embodiment of this invention.

  A toilet seat according to the present invention is a toilet seat formed by forming a hollow portion in which a heater is accommodated between an upper plate and a lower plate, and joining the upper plate and the lower plate by vibration welding. And each of the lower plate has welding ribs that are welded when vibration welding each other, the seat surface of the upper plate is formed of a soft material, and the welding ribs of the upper plate are formed of a hard material, The lower plate is made of a hard material. Thereby, a toilet seat upper board and a toilet seat lower board are joined easily. Embodiments of the present invention will be described below.

[Overview of warm water flush toilet seat]
FIG. 1 is a perspective view showing an overview of a hot water washing toilet seat according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration example of the warm water cleaning toilet seat according to the embodiment of the present invention.

  A warm water cleaning toilet seat 1 shown in FIG. 1 is a toilet seat having a function of performing local cleaning after a toilet with warm water and a heating function. As shown in FIG. 2, the warm water flush toilet seat 1 is formed in a five-layer structure including a toilet seat upper plate 2, a heater 3, a heat insulating material 4, and a toilet seat lower plate 5 in order from the top.

  The toilet seat upper plate 2 is an upper plate constituting a seating surface 2a on which a user is seated. The seating surface 2a of the toilet seat upper plate 2 is formed of a soft material having elasticity such as synthetic resin. However, the welding ribs 21, 22 and the like (see FIG. 3) provided on the back surface of the toilet seat upper plate 2 are formed of a hard material. Details of the welding ribs 21 and 22 will be described later. Note that the hard material may have elasticity. However, the elastic modulus of the hard material when having elasticity is smaller than the elastic modulus of the soft material.

  The heater 3 is a thin plate in which a heater wire 31 for heating the toilet seat upper plate 2 is wired on the back surface. The heater 3 is attached to the back surface of the toilet seat upper plate 2.

  The heat insulating material 4 is a member having a heat insulating function for preventing heat generated by the heater 3 from being transmitted to the toilet seat lower plate 5. The heat insulating material 4 is attached to the surface of the toilet seat lower plate 5.

  The toilet seat lower plate 5 is a lower plate that constitutes the lower surface of the hot water cleaning toilet seat 1. The toilet seat lower plate 5 is formed of a hard material. On the surface of the toilet seat lower plate 5, welding ribs 5a and 5b (see FIG. 3) are formed. The welding ribs 5a and 5b will be described later in detail.

  The warm water cleaning toilet seat 1 described above is formed by joining the toilet seat upper plate 2 to which the heater 3 is attached and the toilet seat lower plate 5 to which the heat insulating material 4 is attached by vibration welding. Specifically, first, the toilet seat upper plate 2 to which the heater 3 is attached and the toilet seat lower plate 5 to which the heat insulating material 4 is attached are respectively held by jigs (not shown) and correctly positioned. Thereafter, the toilet seat lower plate 5 and the toilet seat upper plate 2 are vibration welded by applying vertical and horizontal vibrations to the jig that holds the toilet seat lower plate 5.

[Cross section of warm water flush toilet seat]
FIG. 3 is a cross-sectional view of a warm water cleaning toilet seat according to an embodiment of the present invention. FIG. 3 shows a cross-sectional view at AA of the warm water washing toilet seat 1 of FIG. In FIG. 3, the left side is the ball portion side of the toilet body, and the right side is the outside of the toilet body.

  As shown in FIG. 3, the toilet seat upper plate 2 is formed with a seating surface 2a inclined obliquely downward toward the ball portion side of the toilet body. A heater wire 31 is wired along the inner peripheral surface of the toilet seat upper plate 2. In the toilet seat upper plate 2, the entire seating surface 2a in the width direction and the portion extending from the left and right ends to the portion that bends downward are uniform reference thickness, and a portion that hangs down to the left and right is connected to this reference thickness. Thin wall thickness.

  The toilet seat lower plate 5 is formed with a substantially uniform reference thickness except for both ends of the toilet seat lower plate 5 in the width direction. In the toilet seat lower plate 5, welding ribs 5 a and 5 b are formed in the vicinity of both ends in the width direction welded to the toilet seat upper plate 2. These welding ribs 5 a and 5 b are formed on the entire circumference along the outer peripheral edge of the toilet seat lower plate 5, and the thickness of the welding ribs 5 a and 5 b is thinner than the reference thickness of the toilet seat lower plate 5.

  A hollow portion 6 in which the heater 3 and the heat insulating material 4 are accommodated is formed between the toilet seat upper plate 2 and the toilet seat lower plate 5.

  In the toilet seat upper plate 2 according to this embodiment, welding ribs 21 and 22 are formed at positions facing the welding ribs 5a and 5b, respectively. When the toilet seat upper plate 2 and the toilet seat lower plate 5 are vibration welded, the welding rib 5a and the welding rib 21 are welded, and the welding rib 5b and the welding rib 22 are welded. Here, the welding ribs 5a and 5b and the welding ribs 21 and 22 are all formed of a hard material.

  Thus, in the warm water washing toilet seat 1 which concerns on this embodiment, the welding ribs 5a, 5b, 21, and 22 are formed with the hard material. Therefore, frictional heat is efficiently generated on the surface where the welding rib 5a and the welding rib 21 are in contact and the surface where the welding rib 5b and the welding rib 22 are in contact. Therefore, even if the portions other than the welding ribs 21 and 22 of the toilet seat upper plate 2 are made of a soft material in order to improve the user's sitting comfort, the toilet seat upper plate 2 and the toilet seat lower plate 5 are vibration welded. Can be joined more easily.

  It supplements about the manufacturing method of such toilet seat upper board 2. FIG. The toilet seat upper plate 2 is manufactured by insert molding or two-color molding. In the case of insert molding, first, the welding ribs 21 and 22 are formed by injecting a hard material into the molds for forming the welding ribs 21 and 22. Thereafter, the molded welding ribs 21 and 22 are taken out and inserted into a mold for forming the toilet seat upper plate 2, and a soft material is injected around the welding ribs 21 and 22 so that portions other than the welding ribs 21 and 22 are attached. Mold. In addition, it is preferable to use olefin resin (for example, polypropylene resin) as a hard material, and to use a polypropylene resin as a soft material. Thus, by using a soft material and a hard material by the same material, both joint surfaces melt and it is easy to adhere. As the soft material, rubber, elastomer or the like may be used.

  On the other hand, in the case of two-color molding, first, a hard material is injected into a mold to mold the welding ribs 21 and 22, and then a soft material is placed around the welding ribs 21 and 22 molded in the same mold. The toilet seat upper plate 2 is molded around the welding ribs 21 and 22. In this case, the soft material and the hard material are the same as those in the above-described insert molding.

[Example of enlarged welded part]
FIG. 4 is an enlarged view showing a welded portion on the ball portion side of the toilet body in the warm water washing toilet seat according to the embodiment of the present invention.

  As shown in FIG. 4, the toilet seat lower plate 5 has a shape in which the upper surface of the toilet seat lower plate 5 is gently inclined toward the left end from the reference thickness portion occupying the center of the width direction of the toilet seat lower plate 5 and the upper surface is shaved. A weld rib 5a is formed at the end of the formed portion. The welding rib 5 a has a shape in which the upper end portion 5 i is inclined at an acute angle with respect to the welding rib 21, and is formed with substantially the same thickness as the toilet seat lower plate 5. Note that the thin portion 5 c protruding outward from the welding rib 5 a is formed with a thickness that is about half of the reference thickness of the toilet seat lower plate 5.

  Further, a butt portion 5d is formed at the end portion of the thin portion 5c on the protruding end side. The abutting portion 5d is formed with substantially the same thickness as the thin-walled portion 5c, and has a shape bent slightly upward at the end portion on the protruding end side. A butting surface 5e, which is the upper surface of the butting portion 5d, is formed as a substantially horizontal plane. The abutting portion 5d may have a shape that does not bend upward at the end portion on the protruding end side.

  On the other hand, the vicinity 2b of the lower left end in the width direction of the toilet seat upper plate 2 is formed with a thickness substantially equal to the width from the welding rib 5a to the butted portion 5d. A welding rib 21 that is welded and joined to the welding rib 5a is provided at the inner lower end of the vicinity portion 2b. A polymerization allowance 2c is formed at the outer lower end of the vicinity 2b so as to overlap the butted portion 5d.

  As shown in an enlarged view in FIG. 4, the welding rib 21 is bonded to the vicinity 2b of the toilet seat upper plate 2 on the welding surface 21a, and the lower end surface 21b is formed as a flat surface. On the other hand, the upper end portion 5i of the welding rib 5a that abuts against the lower end surface 21b of the welding rib 21 is formed in a shape that protrudes substantially in the vicinity of the center toward the upper portion. Therefore, friction easily occurs between the lower end surface 21b of the welding rib 21 and the upper end portion 5i of the welding rib 5a, and the toilet seat upper plate 2 and the toilet seat lower plate 5 can be easily welded and joined.

  Moreover, when welding between the lower end surface 21b of the welding rib 21 and the upper end part 5i of the welding rib 5a by vibration welding, a burr | flash generate | occur | produces between the lower end surface 21b and the upper end part 5i. However, according to this embodiment, the generated burr can be hidden by the butting portion 5d and the polymerization allowance 2c provided outside the burr generation region.

  Further, since the butted portion 5d and the polymerization allowance 2c are formed of different materials, that is, a soft material and a hard material, respectively, both are hardly welded even when vibration welding is performed. For this reason, the gap between the butted portion 5d and the polymerization allowance 2c can be brought into close contact with that of the conventional art. This is effective not only from the viewpoint of hiding the burr but also from the hygiene aspect of preventing entry of foreign matter or the like from the gap between the butted portion 5d and the polymerization allowance 2c.

  FIG. 5 is an enlarged view showing a welded portion on the outer side of the toilet body in the warm water washing toilet seat according to the embodiment of the present invention.

  As shown in FIG. 5, the toilet seat lower plate 5 has a shape in which the upper surface of the toilet seat lower plate 5 is gently inclined toward the right end from the reference thickness portion occupying the center in the width direction and the upper surface is shaved. A weld rib 5b is formed at the end of the formed portion. As for the welding rib 5b, like the welding rib 5a described above, the thin portion 5f protruding outward from the welding rib 5b, and the butted portion 5g that is slightly bent upward at the protruding end side end of the thin portion 5f. In addition, a substantially horizontal butting surface 5h, which is the upper surface of the butting portion 5g, is formed.

  On the other hand, a portion 2e near the lower right end of the toilet seat upper plate 2 in the width direction is formed with a thickness substantially equal to the width from the welding rib 5b to the butting portion 5g. A welding rib 22 that is welded and joined to the welding rib 5b is provided at the inner lower end of the vicinity portion 2e. In addition, a polymerization allowance 2f that overlaps the butted portion 5g is formed at the outer lower end of the vicinity portion 2e.

  The toilet seat lower plate 5 has the welding ribs 5a and 5b and the butting portions 5d and 5g made of the same hard material as the welding ribs 21 and 22 of the toilet seat upper plate 2, and the other portions are the welding ribs 5a and 5b and the butting portion 5d, A hard material that is softer than 5 g of hard material and harder than soft material may be used. In this case, the toilet seat lower plate 5 is manufactured by insert molding or two-color molding, like the toilet seat upper plate 2.

  As shown in an enlarged view in FIG. 5, the welding rib 22 is bonded to the vicinity 2e of the toilet seat upper plate 2 on the welding surface 22a, and its lower end surface 22b is formed as a flat surface. On the other hand, the upper end portion 5j of the welding rib 5b that abuts against the lower end surface 22b of the welding rib 22 is formed in a shape in which a substantially central portion protrudes upward. Therefore, friction easily occurs between the lower end surface 22b of the welding rib 22 and the upper end portion 5j of the welding rib 5b, and the toilet seat upper plate 2 and the toilet seat lower plate 5 can be easily welded and joined.

  Moreover, when welding between the lower end surface 22b of the welding rib 22 and the upper end part 5j of the welding rib 5b by vibration welding, a burr | flash generate | occur | produces between the lower end surface 22b and the upper end part 5j. However, according to this embodiment, the generated burr can be hidden by the butting portion 5g and the polymerization allowance 2f provided outside the burr generation region.

  Furthermore, since the butting portion 5g and the polymerization allowance 2f are formed of different materials, that is, a soft material and a hard material, respectively, both are hardly welded even when vibration welding is performed. For this reason, the gap between the butted portion 5g and the polymerization allowance 2f can be made tighter than that of the related art. This is effective not only in terms of concealing burrs but also in terms of hygiene in preventing entry of foreign matter and the like from the gap between the butted portion 5g and the polymerization allowance 2f.

[Modified example of toilet seat with warm water washing]
FIG. 6 is a cross-sectional view showing a modification of the hot water washing toilet seat according to one embodiment of the present invention. FIG. 7 is an enlarged view showing a modification of the welded portion on the ball portion side of the toilet bowl body in the warm water flush toilet seat according to one embodiment of the present invention.

  6 and 7 show a modified example of a cross-sectional view at AA of a warm water cleaning toilet seat 1A as a modified example of the warm water cleaning toilet seat 1 of FIG. In FIG. 6, the left side is the ball portion side of the toilet body, and the right side is the outside of the toilet body. Moreover, in FIG. 7, the welding part by the side of the ball | bowl part of a toilet bowl main body is expanded and shown. In FIG. 6 and FIG. 7, the same components as those in FIG. 3 and FIG.

  As shown in FIG. 6, the toilet seat upper plate 12 is formed with a seating surface 12a inclined obliquely downward toward the ball portion side of the toilet body. In the toilet seat upper plate 12 according to this modification, welding ribs 121 and 22 are formed at positions facing the welding ribs 5a and 5b, respectively. When the toilet seat upper plate 12 and the toilet seat lower plate 5 are subjected to vibration welding, the welding rib 5a and the welding rib 121 are welded, and the welding rib 5b and the welding rib 22 are welded. Here, the welding ribs 5a and 5b and the welding ribs 121 and 22 are all made of a hard material.

  The welding rib 121 is different from the welding rib 21 shown in FIG. 3 in that the length (height) of the welding rib 121 in the vertical direction is longer (higher) than the welding rib 22 on the outer peripheral side. Accordingly, when the user is seated on the seating surface 12a, the warm water flush toilet seat 1A is not easily deformed to the inner peripheral side. Thereby, in addition to the effect mentioned above, when a user seats on the warm water washing toilet seat 1A, it can suppress that the toilet seat upper board 12 deform | transforms into an inner peripheral side too much, and a collar part falls into an inner peripheral side. Since the material of such a welding rib 121 is the same as that of the above-mentioned welding rib 21, description is abbreviate | omitted here.

  As mentioned above, although embodiment of this invention was described, the said embodiment showed one of the application examples of this invention, and in the meaning which limits the technical scope of this invention to the specific structure of the said embodiment. Absent. Various modifications can be made without departing from the scope of the present invention.

1, 1A Warm water washing toilet seat 2 Toilet seat upper plate 2a Seating surface 2c, 2f Polymerization allowance 3 Heater 4 Heat insulating material 5 Toilet seat lower plate 5a, 5b Welding rib 5d, 5g Butting portion 5e, 5h Butting surface 6 Hollow portion 12 Toilet seat upper plate 12a Seating surface 12c, 12f Polymerization allowance 21, 22, 121 Welding rib

Claims (3)

A toilet seat is formed between the upper plate and the lower plate, in which a hollow portion is formed to accommodate the heater, and the upper plate and the lower plate are joined by vibration welding,
Each of the upper plate and the lower plate has a welding rib to be welded when vibration welding each other,
The seating surface of the upper plate is formed of a soft material, and the welding rib of the upper plate is formed of a hard material,
The toilet seat is characterized in that the lower plate is formed of a hard material.   The toilet seat according to claim 1, wherein the length of the welding rib of the upper plate in the vertical direction is longer on the inner peripheral side than on the outer peripheral side. The lower plate is formed with a thin butted portion outside the welding rib of the lower plate,
The toilet seat according to claim 1 or 2, wherein a polymerization margin is formed on the upper plate so as to be polymerized on a butt surface of the upper surface of the butt portion.

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