JPS5927822Y2 - bath lid - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a bath cover used for keeping a bathtub warm or preventing danger.

Conventionally, as shown in Figure 9, the lid of a household bathtub has a top, bottom, and two lids that have an area slightly larger than the opening area of the bathtub.
Between two rectangular synthetic resin sheets 61 and 62 made of vinyl chloride or the like, there are 3 to 7 core plates 63 made of rectangular wooden or synthetic resin plates depending on the size of the bathtub. Both laminated resin sheets 61 are arranged in parallel at regular intervals.
62 are welded to each other at their peripheral edges and between the core plates '63, and a plurality of core plates 63 are bonded between the synthetic resin sheets 61 and 62.
interposed in a watertight state (Utility Model Publication No. 55-4111)
Various structures including 3) have been proposed.

However, not only the lid shown in FIG. 9 but also all conventional lids have the number of core plates 63 themselves, depending on the width of the bathtub, from 3 to 7, and the width of the single core plate 63 is wide. Also, since the distance between adjacent core plates 63 is narrow compared to the thickness of the core plates 63, the core plates 63 are sequentially rolled in one direction with one side overlapping each other. If the synthetic resin sheets 61 and 62 are not rolled together and are forcibly rolled, there is a risk that the synthetic resin sheets 61 and 62 will break and other problems may occur, such as the mutually welded parts coming off.

For this reason, as shown in FIG. 10, the lid must be folded by alternately bending the core plates 63 in opposite directions and overlapping them so that they overlap each other, similar to an accordion curtain or the like. It takes time to open and close the lid, and since the width of the single core plate 63 is large, the load on the lid as a whole is also large, making it cumbersome to carry around in the bathroom.

The present invention was devised in view of the above circumstances, and its purpose is to make the width of the core plate 2 to 4 times the thickness, the number of core plates 10 to 30, and the lid in the longitudinal direction. When wound up, the first to third core plates from the winding start end side can be wound in three layers in a mutually laminated state, and the appearance of the finished state can be approximately cylindrical. This makes it easy and quick to cover the bathtub and remove it from the bathtub, and it can be rolled up into a small volume for easy carrying, which is necessary to prevent danger to infants, etc. To provide a bath lid with sufficient strength.

Hereinafter, the present invention will be specifically explained based on drawings showing embodiments thereof.

Fig. 1 is a perspective view showing how the bath lid according to the present invention (hereinafter referred to as the proposed product) is used, Fig. 2 is a partially cutaway plan view of the proposed product, and Fig. 3 shows the state in which the proposed product is partially rolled up. The enlarged sectional view shown in FIG. 4 is a partially cutaway perspective view of the rolled-up state, and in the figure, B indicates the bathtub and C indicates the bathtub lid.

The bath lid C includes upper and lower synthetic resin sheets 1 and 2, a core plate 3, and an anti-slip sheet 4 which also serves to reinforce the peripheral edge of the lower synthetic resin sheet 2, as essential constituent members.

The synthetic resin sheets 1 and 2 are made of vinyl chloride or the like and are formed into a rectangular shape with a width that can cover the entire upper surface of the bathtub B and a required thickness.
a are welded to each other in a watertight state over the entire circumference, and the central part is partially welded over a plurality of strips from one longitudinal end to the other end in a direction perpendicular to the longitudinal direction, and the core plate 3 is enclosed and interposed. A plurality (usually 14 to 20) of continuous book accommodating portions 12 of appropriate length are formed in parallel with a required interval between them.

Core board 3 is a single board. Side edge B in the width direction of bathtub B made of plywood or synthetic resin board 1. It is formed into an elongated rectangular shape that has a length that can be placed on B 2 and whose circumferential length in the width direction is slightly smaller than the inner circumferential length in the width direction of the accommodating part 12. They are inserted one by one, and in this state, as shown in FIG. 3, required gaps 12a and 12b are formed between the housing portion 12 and the housing portion 12 at both ends in the width direction.

The anti-slip sheet 4 is made of soft vinyl chloride that has been made sticky by blending a large amount of plasticizer, and is formed into a band shape.The bath lid C is placed over the bathtub B along the four circumferences of the lower synthetic resin sheet 2. At this time, it is welded to the portion facing the peripheral wall surface of the bathtub B.

Such a bath lid C is made by molding a synthetic resin sheet 1,
2. It is manufactured by simultaneously welding the anti-slip sheets 4 to each other and enclosing the core plate 3, but the manufacturing procedure itself is not particularly limited to this, and conventionally known methods may be adopted as appropriate. Of course it's a good thing.

The relationship between the width W and thickness d of the core plate 3 in this product, the width (+ of the circumference) and W of the accommodating part 12 in which the core plate 3 is inserted, and the distance S between each accommodating part 12 is as follows. As shown in Figure 3,
When the bath lid C is rolled in one direction with its longitudinal direction facing, the core plates 3 from the first to at least the third can be rolled up into three layers, and are rolled up at the minimum radius while being tightly rolled as they are. In some cases, the winding shape is set as follows so that the winding shape can be formed into a substantially cylindrical shape as shown in FIG.

As shown in FIG. 3, each core plate 3 has a three-cylindrical gap in its housing portion 12 at both ends in the width direction, with the base being d and the isosceles being l. The bath lid C is housed in a state in which one longitudinal end of the bath lid C is placed with the upper synthetic resin sheet 1 facing inside, which is considered to be the most usual form, that is, with the lower synthetic resin sheet 2 facing outside. When winding in one direction toward the other end in a state in which the core plates 3 are stacked one on top of the other, the first to third core plates 3 can be stacked in three layers as shown in FIG. 3. , the contact points between the opposing lower edge portions of the adjacent core plates 3 and 3 and the lower synthetic resin sheet 2 are respectively a and l), and the upper portion between the accommodating portions 12 is shown.

Partial welding part 12 C, 1 between lower synthetic resin sheets 1 and 2
If 2C is C1 and C2, the dimension from point a to point b via points C1 and C2 is at least 3d+4△d (however, △
It is sufficient that d is the thickness of the synthetic resin sheet.

By the way, the dimension between aC1C2b changes depending on the attitude of the core plate 3 in the accommodation part 12, but as a typical case of the attitude of the core plate 3 in the accommodation part 12, as shown in FIG. , C2 point is located opposite the upper and lower midpoints of the core plate 3, and
1, C2 points are located at the same level as the top surface of the core plate 3, and
There are three possible cases where the position is located at a level that coincides with the lower surface of.

Moreover, in each case, when the core plate 3 is located at the center in the width direction within the housing section 12 (FIG. 5A, FIG. 6A,
In the case where the core plates 3 are located as far away from each other as possible (the opening in Figure 5, the opening in Figure 6, and the opening in Figure 7), the core plates 3
are located as close as possible to each other (Fig. 5 C, 6
It can be divided into Figure C and Figure 7 C).

Of course, in addition to this, there is also the above C1°C in the thickness direction of the core plate 3.
Various modes can be considered depending on the positions of the two points, but including these, the dimension between aC1C2b is the shortest in the case shown in FIG. 6C.

In the case shown in Fig. 3 C, points C□ and C2 are at the same level as the bottom surface of the core plate 3, and both core plates 3, 3 are closest to each other,
Point a and point 01 are in agreement, and point C2 and point d are in agreement.

In this state, the distance between a and b is S, so S = 3 d
It is sufficient to set S so that it becomes +4△d, but
When three core plates 3 are stacked in three layers as shown in FIG. 3, it is normal for some interference between the core plates 3 to occur.
The third core plates 3, 3 are moved in directions away from each other, and end up in Figure 5, Figure 6, Figure 7, Figure 5 A, Figure 6 B, Figure 7, Figure 8. The situation changes as shown below.

Therefore, in cases other than the cases shown in FIG. In the case, the dimension between aC1C2d, i.e. CW-(d+W)
It is sufficient to set the width dimension W of the accommodating portion 12 or the thickness d or width W of the core plate 3 so that ] is equal to or larger than 3d+4Δd.

However, since the bath cover C is used frequently over a long period of time, it gets involved every time it is used.

In a state where the core plates 3, 3 have to be separated to the maximum extent as shown in Figure 7, the parts of the synthetic resin sheets 1, 2 that come into contact with the ridgeline of the core plate 3 are worn from the inner and outer circumferential sides, and It is assumed that this results in shortening the life of the lid C.

Therefore, preferably the states shown in FIG. 5A, FIG. 6A, and FIG. 7A, especially the state shown in FIG. The housing part 12 and the core plate 3 are moved in the width direction while leaving an isosceles triangular gap with one side d and the second isosceles l between the inner circumferential walls of the housing part 12 at both ends of the housing part 12. If the bath cover C can be rolled up in three layers as shown in FIG. 3 without relative movement, it will be the most desirable embodiment from the viewpoint of extending the life of the bath cover C.

The dimension between aC1C2b in the state shown in Figure 5 A is S+W
-W, the conditions for being able to wind it in three layers are given by the following equation (1).

S0W-W≧3d+4△d... (1) If each synthetic resin sheet 1, 2 has some elasticity, 4△d is the elasticity of the synthetic resin sheet 1, 2. If this is ignored, equation (1) can be rewritten as equation (2).

S+W≧3d+W (2) Therefore, the width dimension W of the accommodating portion 120 in the bath lid C, the interval between adjacent accommodating portions 12, in other words, the partial welded portion 12C
, 12C, and the width W and thickness d of the core plate 3 may be set so that the above equation (2) holds true.

Next, when the bath lid C is wound so that the fourth and subsequent core plates have the minimum radius, the conditions for the rolled shape to become cylindrical will be described.

Figures 8A and 9C are schematic diagrams showing the respective winding shapes when the dimensional ratio between the thickness d and the width W of the core plate 3 is changed, and Figure 8A is a schematic diagram showing the respective winding shapes when the dimensional ratio between the thickness d and the width dimension W of the core plate 3 is changed. The case where W and the thickness d are approximately 2:1, and the opening in Figure 8 is approximately 3:1,
FIG. 8C shows a case where the ratio is approximately 8:1.

As is clear from this figure, as the dimension ratio between width and thickness increases, the wasted space occupied inside the rolled up bath lid C increases, and when the same number of core plates are rolled up, the dimension ratio becomes smaller. In order for the rolled shape to become closer to a cylindrical shape more quickly, in other words, for the rolled shape to become a cylindrical shape, a required number of core plates is required depending on the size ratio, and this number of core plates has a large size ratio. It turns out that it gets bigger.

Therefore, in order to have a cylindrical shape when rolled up as a bath cover C used for a bathtub B which is used for domestic use and has a limited longitudinal dimension, the dimensional ratio between the width W and the thickness d should be set to 1 as much as possible.
It is a good idea to make the width W and thickness d as small as possible in order to increase the number of core plates and increase the number of core plates. An increase in cost is unavoidable, and the strength of the core plate 3 itself is reduced.

As a countermeasure to solve this inconvenience, it is possible to increase the width W and thickness d while keeping the width W and thickness d of the core plate 3 at 1:1, that is, to use a square lumber as the core plate 3. However, using such a core material not only increases the cost of the core material, but also increases the load, increases the required area of the synthetic resin sheet 1.2, and also increases the area around the edge of the bathtub B. B1. The gap between B 2 and the partial welded part 12C between the core plate 3 of the bath lid C becomes large, which reduces the heat retention function, and furthermore, the unevenness of the surface of the bath lid C becomes large, which is unfavorable in terms of appearance. This will cause inconvenience.

Therefore, this product does not have the above-mentioned disadvantages, can be wrapped in a cylindrical shape, and has a thickness that is strong enough to withstand (40 kg or more) especially when a child stands on the bath lid C. In order to have the same characteristics and reduce the product cost, the dimensional ratio of the width W and the thickness of the core plate 3 is set to 1.5:1.
~5:1 or more, and the number of core plates 3 was in the range of 10 to 30.

The ratio between the width W of the core plate 3 determined in this way and the dimension between the opposing end surfaces of the adjacent core plates 3, 3 is as follows (
3) Given by Eq.

If the dimension between aC1C2b is used approximately as the value of D, it will be given by D#3d, so equation (3) can be rewritten as equation (4) below.

Next, to show an example of the dimensions of each part of the main business, as is clear from Fig. 2, the longitudinal width L1 is 900 mm, and the vertical width L2 is 7 mm.
00 mm, the half circumference length W of the housing part 120 is 51 mm, the dimension S between the partially welded parts 12C and 12C is 15 mm, and the core plate 3
The width W is designed to be 35 mm, and the thickness d is designed to be 10 mm.

In the main business of this structure, when the core plates 3 are rolled in one direction in the longitudinal direction, the first to third core plates 3 in the longitudinal direction are rolled in three layers. It can also be rolled up into a cylindrical shape by rolling the entire product to the minimum radius without loosening, making it easy to carry and not bulky when leaning against a wall in the bathroom. Furthermore, the configuration of the molds and the like used during production can be simplified.

As mentioned above, in the main business, it is not only extremely easy to put on and remove from the bathtub, but when rolled up, it has a roughly cylindrical shape, is not bulky, is easy to carry, and is durable. The present invention has excellent effects, such as long-lasting performance.

[Brief explanation of the drawings] Figure 1 is a perspective view showing the main business side in use, Figure 2 is a partially cutaway plan view of the main business side, Figure 3 is an enlarged sectional view in the longitudinal direction, and Figure 4 is an enlarged longitudinal sectional view. A partial perspective view showing the main business side rolled up,
Figure 5 A 2 mouths, C Figure 6 A 9 mouths. C, Fig. 7 A9, C is an explanatory diagram schematically showing the positional relationship between the storage part and the core plate, and Fig. 8 A9, C shows the relationship between the width and thickness of the core plate in the winding form. Explanatory diagram schematically showing the relationship, No. 9
The figure is a perspective view of a conventional product, and FIG. 10 is an enlarged sectional view showing a part of the conventional product in a rolled state. 1.2...Synthetic resin sheet, 3...Core plate, 4...Non-slip sheet, 12...
Accommodating part, 12 C...Partial welding part, B...
...Bathtub, C...Bath cover.

Claims (1)

[Scope of utility model registration request] For each of a plurality of watertight accommodating sections formed parallel to each other at a required interval between stacked synthetic resin sheets, a required gap is formed between the core plate and the peripheral wall of the accommodating section on both sides in the width direction. In the bath lid, which is sealed in a closed state, the width of the core plate is 2" to 4 times the thickness, the number of core plates is 10 to 30, and the core plate is rolled in one direction in the longitudinal direction. When the winding/winding is started, the first to third core plates from the winding start end side can be wound in three layers in a mutually laminated state, and the appearance of the winding finished state can be approximately cylindrical. A bath lid characterized by the following features: