JP5861979B2 - Bathtub - Google Patents

Description

  The present invention relates to a bathtub.

  As for the conventional bathtub, what is equipped with the inner tank part which can store bathtub water, and the rim | limb part provided in the upper end edge of the inner tank part is common. When a user of such a bathtub goes into and out of the bathtub straddling the rim part, it is usual to move the body while placing a hand on the rim part.

  Also, for example, 1) a structure of a bathtub + finger-hanging portion in which the entire upper surface of the rim portion is formed substantially horizontally so that the user (bathing person) can easily stand up when standing up from a bathing posture seated in the bathtub. (See, for example, Patent Document 1) 2) Structure of bathtub + finger-hanging part in which the entire upper surface of the rim part is gently inclined downward toward the inner side of the bathtub (see, for example, Patent Document 2) 3) The entire upper surface of the rim part is on the inner side of the bathtub The thing of the structure (for example, refer patent document 3) of the bathtub + finger-hanging part which steeply descended toward is proposed.

JP-A-8-336478 Japanese Patent No. 4345551 Design Registration No. 1312057

  However, 1) In the case of the structure of the bathtub + finger hanging portion where the entire upper surface of the rim portion is formed substantially horizontally, the straddling operation is easy to perform, but it is difficult to realize an easy rising operation. In addition, 2) In the case of the structure of the bathtub + finger hanging portion where the entire upper surface of the rim portion is gently inclined downward toward the inside of the bathtub, the straddling operation is also easy, but it is difficult to realize an easy rising operation. On the other hand, 3) In the case of the structure of the bathtub + finger hanging part where the entire upper surface of the rim part is inclined downward and steeply toward the inside of the bathtub, it is possible to realize an easy rising operation, Hands become slippery when straddling, making it difficult to deposit weight in a stable posture.

  Thus, the conventional bathtub has not yet achieved both the support performance at the time of rising and the support performance at the time of straddling (ease of straddling). It is important for the present inventor to tighten the side by providing a steeply inclined surface in order to improve the stand-up property, but in that case, the straddling property is deteriorated as in Patent Document 3, so that both are compatible. I have come to know that this is important.

  In view of the above-described problems, the present application aims to provide a bathtub capable of reducing the burden on the user during the standing-up operation and easily standing-up and keeping the weight without slipping the hand during the straddling operation. .

  The present invention is based on such knowledge, and is provided at an inner tank part capable of storing bathtub water, a rim part provided at an upper end edge of the inner tank part, and a lower position on the outer side of the rim part. A bathtub that has a finger hook that can hook a user's fingertip, and a user sitting in the bathtub stands up on the upper surface of the rim portion on the inner tub portion side. In operation, the first steeply descending toward the inner tank portion so as to connect the upper position and the lower position of the finger-hanging portion so that a pushing force can be applied so that the user's side is tightened. The upper surface portion of the rim portion is formed on the upper surface of the rim portion so that the user slides his / her hand when the user grips the rim portion so as to move in and out of the bathtub. So that you can keep your weight It is characterized in that the second top surface portion smaller inclination are formed than the first top surface portion.

  In the present invention, in order to allow the user to apply a push-up force to the rim portion with the sides tightened, the user suddenly descends toward the inside of the bathtub so as to connect the upper position and the lower position of the finger rest portion. The inclined first upper surface portion is formed in the rim portion. When a hand is applied to the first upper surface portion and a pushing force is applied, the first upper surface portion is inclined downward toward the inside of the bathtub so that the user's side is easily tightened naturally.

  Also, if the entire upper surface of the rim portion is a steeply descending surface such as the first upper surface portion, when the user grips the rim portion to move in and out of the tub, the hand is easy to slip and stable. In the present invention, a second upper surface portion having a smaller inclination than the first upper surface portion is formed on the upper surface of the rim portion in that the problem that it becomes impossible to deposit weight in the posture is generated. If the user puts his hand on the second upper surface portion and keeps his weight, the user can hardly slide his / her hand and can straddle with a stable posture.

  In such a bathtub, it is preferable that the second upper surface portion has a rim width smaller than that of the first upper surface portion.

  In providing the first upper surface portion and the second upper surface portion described above on the upper surface of the rim portion, if the rim width of the second upper surface portion is excessively increased, the user puts the fingertip on the finger hook portion when standing up. When hooked, most of the palm is placed on the second upper surface, and only a part of the palm may be placed on the first upper surface, especially when the user's hand is small This is the case. In such a state, a large force is applied to the second upper surface portion in order to obtain a large push-up force necessary for rising, so that the user's side is easily opened naturally. On the other hand, in the present invention, since the rim width of the second upper surface portion is smaller than that of the first upper surface portion, when the user hooks the fingertip on the finger rest portion when standing up, most of the palm is It becomes easy to be placed on the upper surface portion of 1, and only a part of the palm is placed on the second upper surface portion. As a result, it becomes easy to apply a large force to the first upper surface portion, the side opening of the user is suppressed, and a large push-up force necessary for standing up can be easily obtained.

  Further, the first upper surface portion is formed in a round shape from the upper position to the lower position of the finger hanging portion and is rounded, and the second upper surface portion is a surface different from the first upper surface portion, It is preferable that the first upper surface portion is formed by a surface having a smaller inclination than the virtual round surface.

  Generally, when the user rises from the bathtub, the vector of the required push-up force changes as the user's posture increases due to the rising action. In this respect, it is possible to smoothly shift the vector of the push-up force by making the first upper surface portion round as in the present invention. By the way, at this time, it is possible to form the first upper surface portion and the second upper surface portion by one round surface by making the first upper surface portion into a round shape. Problems can arise. That is, when the first upper surface portion (steeply inclined surface) and the second upper surface portion (slowly inclined surface) are formed by one R-surface (surface where the curvature does not change), the R-surface gradually changes the tangent angle. As a result, the rim width increases when an upper surface portion required for straddling operation is obtained, and it is difficult to grip the rim portion at the opposite position so that the hand does not slip during the stand-up operation or straddling operation. The problem of becoming may arise. On the other hand, in the present invention, since the second upper surface portion is formed by a surface having a small inclination different from the rounded surface of the first upper surface portion, it is possible to change the tangential angle rapidly. The rim width can be reduced, and the rim portion can be easily gripped at the opposite position so that the hand does not slip during the stand-up operation or straddle operation.

  In such a bathtub, it is preferable that the second upper surface portion is gently inclined downward toward the inner side of the bathtub.

  Generally, in order to further reduce the burden on the user during the standing-up operation, it is preferable that the fingertip hooked on the finger-hanging portion is at a higher position with respect to the wrist placed on the first upper surface portion. For example, when the second upper surface portion is gently inclined upward toward the inside of the bathtub, or is made horizontal, the fingertip hooked on the finger rest portion is relatively low with respect to the base of the palm. Sometimes the user's side is easy to open. If it does so, it is unpreferable from a viewpoint of reducing the burden at the time of a user's standup. On the other hand, in the present invention, since the second upper surface portion is gently inclined downward toward the inner side of the bathtub, the fingertip hooked on the finger-hanging portion with respect to the base of the palm is positioned relatively high. Since it becomes difficult to open the side of the user during the rising operation, the burden on the user can be further reduced.

  Furthermore, it is preferable that a third upper surface portion having an intermediate inclination angle between the first upper surface portion and the second upper surface portion is formed between the first upper surface portion and the second upper surface portion. .

  When the rising motion is divided into phases in the initial stage, the middle stage, and the final stage, it is effective to apply a force to the first upper surface part steeply descending as described above because a large pushing force is required in the initial stage. It is. Also, since the final stage is a state in which the rising motion is almost completed, a large push-up force is unnecessary, and it is necessary to be able to hold the posture stably without sliding the hand, so the inclination is small. It is effective to apply a force to the second upper surface portion. That is, in the entire rising operation, a phase mainly using the first upper surface portion and a phase mainly using the second upper surface portion occur. At this time, the first upper surface portion and the second upper surface portion are formed as described above in order to reduce the overall rim width (the first upper surface portion is rounded from the upper position to the lower position of the finger rest portion. The second upper surface portion is a surface different from the first upper surface portion, and is formed with a surface having a smaller inclination than the virtual round surface obtained by extending the first upper surface portion. It is preferable that the configuration is However, in such a case, when they are directly connected, a step is generated. If a step occurs, the direction vector of the force applied to the rim will change abruptly, which may cause your hand to slide and may prevent you from standing up stably. In this regard, according to the present invention in which the third upper surface portion having an intermediate inclination angle is provided between the first upper surface portion and the second upper surface portion, the step is relaxed and the force applied to the rim portion is reduced. Since the direction vector changes smoothly, the rising operation can be stably performed.

  In such a bathtub, it is more preferable that the third upper surface portion has a rim width smaller than that of the first upper surface portion and the second upper surface portion.

  The third upper surface portion smoothly shifts the direction vector of the force applied to the rim (the main body is only the first upper surface portion and the second upper surface portion), and therefore the width needs to be large. There is no. On the contrary, considering that the overall rim width is increased by increasing the width of the third upper surface portion, and the rim portion is difficult to grip firmly, the third upper surface portion is the first upper surface portion and It is preferable to form the rim width smaller than that of the second upper surface portion.

  According to the present invention, it is possible to reduce the burden on the user at the time of the standing-up operation and to easily stand up and to keep the weight without slipping the hand at the time of the straddling operation.

It is a perspective view which shows an example of the bathroom unit to which the bathtub concerning this invention was applied. It is sectional drawing which shows the structural example of a bathtub. It is a figure which shows schematically the external shape of the rim | limb part of the bathtub in one Embodiment of this invention. It is a figure which shows a mode at the time of the user (bathing person) sitting in the bathtub grasping a rim | limb part and standing up. It is a figure which shows the mode of the hand holding the rim | limb part, when a user stands up. It is a figure which shows the mode of the hand on a rim | limb part at the time of a user straddling operation | movement. It is a figure which shows an example of the rim | limb part by which the steeply inclined surface was formed rounded from the upper position of the finger-hanging part to the lower position, and was rounded. It is a figure which shows the mode of the hand when the user is standing up and holding the rim | limb part shown in FIG. It is a figure which shows an example of the rim | limb part which made the curvature small in order to make a gently inclined surface flat, and also changed the tangent angle more rapidly between the steeply inclined surface and the gently inclined surface. It is a figure which shows an example of the rim | limb part which made the gentle inclination surface gently descend and incline toward the bathtub inner side. It is a figure which shows an example of the rim | limb part which formed the intermediate | middle inclined surface between the steeply inclined surface and the gentle inclined surface. It is a figure which shows another example of the rim | limb part which formed the intermediate | middle inclined surface between the steeply inclined surface and the gentle inclined surface. It is a figure which shows the rim | limb part of the bathtub in which the finger hook part is formed using the horizontal direction level | step difference between the outer side edge of a rim | limb part, and a bathtub wall (bathtub apron). It is a figure explaining the tendency for the rim | limb width | variety of a rim | limb part to become large entirely, when both a steeply inclined surface and a gentle inclined surface are formed with the single rounded surface. It is a figure explaining that the rim width | variety of a rim | limb part can be made small as a whole, when a gently inclined surface is formed with a surface with a small inclination different from the round surface of the steeply inclined surface. It is the schematic explaining that the inclination | tilt of a gently inclined surface becomes gentle, so that the inclination | tilt angle (theta) 1 of the gently inclined surface with respect to a horizontal surface is close to zero. It is a figure which shows a mode at the time of the user who is sitting in the bathtub of a conventional structure grasping | assembling a rim | limb part, and rising | starting up as a comparative example. It is a figure which shows the mode of the hand holding the conventional rim | limb part when a user stands | starts up as a comparative example. It is a figure which shows the mode of the hand put on the conventional rim | limb part when a user straddles operation | movement as a comparative example. It is a figure which shows the mode of the user's hand at the time of the stand-up operation | movement at the time of making a gentle inclination surface rise up gently toward the bathtub inner side, or it makes it horizontal. It is a figure which shows an example of the rim | limb part at the time of forming both a steeply inclined surface and a gentle inclined surface with the single round surface as a comparative example. It is a figure which shows the mode of the hand when the user is standing up and holding the rim | limb part shown in FIG. 21 as a comparative example.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  The bathtub 1 according to the present invention has an inner tank part 2, a rim part 3, a finger hook part 4, and the like. The bathtub 1 of the present embodiment shown in FIG. 1 and the like has a substantially quadrangular shape in plan view, and in the bathroom 10, one of a pair of long side bathtub walls (tub aprons) 12 is directed toward the washing place 11 side. is set up. A drain port (not shown) is formed at the lowest position in the bathtub 1. The bottom (tub bottom) 13 of the bathtub 1 has a drainage gradient that makes this drainage port the lowest, so that the water on the surface material flows along the drainage gradient and is collected at the drainage port. It has become.

  The bathtub 1 is supported by the gantry 100 (see FIG. 1). The gantry 100 is configured by combining, for example, columnar metal materials (steel materials) vertically and horizontally, and has sufficient strength and durability to support a bathtub load in a state where bath water is accumulated and a bather is present. It is installed on the building floor (see Fig. 1).

  The inner tank part 2 of the bathtub 1 is configured so as to be able to store bathtub water. The user can straddle the rim portion 3 and sit in the inner tub portion 2 to take a bathing posture.

  The rim portion (tub rim) 3 is provided at the upper edge of the inner tank portion 2. In general, a user who straddles the rim portion 3 often places his hand on the rim portion or grasps the rim portion 3.

  The finger hooking portion 4 is a portion provided at a lower position on the outer side of the rim portion 3 so that the user's fingertip can be hooked. For example, in the present embodiment, a concave portion into which a part of the finger enters is provided at a lower position on the outer side of the rim portion 3 so that the user can be hooked on the ceiling surface 41 in the concave portion (see FIG. 3 etc.).

  In addition, in this specification, the above-mentioned rim | limb part (bath-tub rim) 3 is made into the area | region where the palm (195 mm) of a standard adult male is mounted in the state which hung the finger on the finger-hanging part 4, The upper surface of the bathtub 1 It is defined as a range within 110 mm from the outer peripheral edge. In other words, the region larger than 110 mm corresponds to the side wall of the inner tank portion 2.

  Here, in the present embodiment, when a user who is in a bathing posture in the bathtub 1 (labeled M in FIG. 4 and the like) tries to stand up, the burden on the user during the rising operation is reduced, In order to make it easy to stand up, the rim portion 3 has a characteristic configuration including a steeply inclined surface 31, a gently inclined surface 32, and an intermediate inclined surface 33 according to circumstances (see FIGS. 3 and 4).

  That is, on the upper surface of the rim portion 3 of the present embodiment on the inner tub portion 2 side, a steeply inclined surface 31 that steeply descends toward the inner tub portion 2 side so as to connect the upper position and the lower position of the finger hook portion 4. Is formed (see FIG. 3). The upper position of the finger-hanging part 4 here is a position that is above the finger-holding part 4 in the vertical direction, for example, a position indicated by reference numeral 4a in FIG. Similarly, the lower position of the finger-hanging portion 4 here is a position that is vertically below the finger-hanging portion 4, for example, a position indicated by reference numeral 4 b in FIG. 3. Furthermore, in FIG. 3 etc., the height in the vertical direction from the lower position 4b to the ceiling surface 41 of the finger rest 4 is indicated by the symbol h. The steeply inclined surface 31 configured as described above has a push-up force so that when the user (bathing person) sitting in the bathtub 1 holds the rim portion 3 and moves up, the user's side is tightened. (When the user tries to stand up using his / her arm, a force that acts particularly in the direction of pushing up the upper body) can be applied naturally and more effectively (see FIGS. 4 and 5).

  The steeply inclined surface 31 occupies a ratio larger than about half with respect to the rim portion 3 of the bathtub 1 (that is, at least larger than 55 mm). The gently inclined surface 32 is larger than 35 mm and smaller than 55 mm with respect to the rim portion 3 of the bathtub 1. The inclination angle of the steeply inclined surface 31 (tangent angle in the case of a curved surface) is 20 to 70 ° with respect to the horizontal plane, and more preferably 30 to 70 °. The inclination angle of the gently inclined surface 32 (tangent angle in the case of a curved surface) is −10 to 10 ° with respect to the horizontal plane. Furthermore, the inclination angle (in the case of a curved surface, the tangent angle) of the side wall of the inner tank portion 2 is 80 to 90 ° with respect to the horizontal plane.

  Here, the burden on the user during the rising operation and the simplicity of the rising operation will be described in comparison with a conventional example (see FIGS. 17 and 18). In the comparative example, 'is added to each symbol. For example, when the entire upper surface of the rim portion (indicated by reference numeral 3 ′ in FIG. 17 and the like) is formed substantially horizontally and a finger hook portion (indicated by reference numeral 4 ′ in FIG. 17 and the like) is provided. Although it is easy to straddle (see FIG. 18), on the other hand, when standing up in the bathtub, the user's side is easy to open, and the elbow is located outside, so the force F applied to the arm is It does not act effectively as the force of the rising action (particularly the action of raising the upper body) (see FIG. 17).

  In this regard, in the bathtub 1 according to the present embodiment as described above, when a pushing force is applied while applying a hand to the steeply inclined surface 31, the steeply inclined surface 31 is located inside the bathtub 1. Because it is steeply descending toward the side, it is easy to attach an angle (for example, α) when putting a hand, the side of the user is tightened naturally, and the elbow is easily located inside (see FIG. 4). . Therefore, in this state, a pushing force (a force acting in the direction of pushing up the upper body when the user tries to stand up using his / her arm) is likely to be applied naturally and more effectively, and the raising operation is more likely to be performed.

  Further, the straddling operation will be described with a comparative example as follows (see FIG. 19). That is, if the entire upper surface of the rim portion (indicated by reference numeral 3 'in FIG. 19) is a steeply descending inclined surface such as the steeply inclined surface 31, the rim portion 3 is used for the user to enter and exit the bathtub. When straddling while grabbing ', the hand becomes slippery, making it difficult to deposit weight in a stable posture (see FIG. 19). In this respect, in the bathtub 1 of the present embodiment as described above, the gently inclined surface 32 having a smaller inclination than the steeply inclined surface 31 is formed on the upper surface of the rim portion 3. If the user puts his / her hand and deposits his / her weight, the user can hardly slide his / her hand and can straddle with a stable posture (see FIG. 6).

  In the present embodiment, the above-described gently inclined surface 32 is formed so that the rim width is smaller than the steeply inclined surface 31 (see FIG. 3 and the like). If the rim width of the gently inclined surface 32 is too large, when the user hooks the fingertip on the finger rest 4 when standing up, most of the palm is placed on the gently inclined surface 32, and the palm is placed on the steeply inclined surface 31. In such a state, a large force is applied to the gently inclined surface 32 in order to obtain a large push-up force necessary for standing up. The person's side becomes easy to open. In this regard, as in the present embodiment, if the gently inclined surface 32 is formed so that the rim width is smaller than the steeply inclined surface 31, when the user hooks the fingertip on the finger rest portion 4 when standing up, most of the palm is It is placed on the steeply inclined surface 31 and only a part of the palm is placed on the gently inclined surface 32 (see FIG. 5). Therefore, it becomes easy to apply a large force to the steeply inclined surface 31, the opening of the user's side is suppressed, and a large pushing force necessary for standing up can be easily obtained.

  In the bathtub 1 of the present embodiment, even if the steeply inclined surface 31 is formed in a round shape from the upper position to the lower position of the finger-hanging portion 4 as in the modified examples shown in FIGS. Good. Further, the gently inclined surface 32 may be a surface different from the steeply inclined surface 31 and may be formed as a surface having a smaller inclination than a virtual round surface obtained by extending the steeply inclined surface 31.

  The modified examples shown in FIGS. 7 and 8 will be described as follows in comparison with the comparative example (see FIGS. 21 and 22). That is, when the user stands up from the bathtub 1, the vector of the required pushing force generally changes as the posture of the user increases due to the rising action. In this regard, the configuration of the steeply inclined surface 31 with a rounded curved surface as in the present embodiment makes it possible to smoothly shift the vector of the push-up force with a change in the posture during the rising operation. Is preferable.

  Here, as an example of the case where the steeply inclined surface 31 is rounded as described above, it is possible to form both the steeply inclined surface 31 and the gently inclined surface 32 by a single rounded surface. The center of curvature of the steeply inclined surface 31 coincides with the center of curvature of the gently inclined surface 32 (see FIG. 21). However, if both the steeply inclined surface 31 and the gently inclined surface 32 are formed with a rounded surface having a single curvature that does not change, the change in the tangent angle becomes uniform, so that it is necessary or suitable for the straddling operation. When the upper surface portion is obtained, the rim width of the rim portion 3 tends to increase as a whole (see FIG. 14), and depending on the radius of curvature, the hand does not slip during the rising operation or straddling operation. Thus, it becomes difficult to grip the rim portion 3 at the facing position (see FIG. 22).

  In this respect, in the present embodiment shown in FIG. 7 and the like, since the gently inclined surface 32 is formed by a surface having a small inclination different from the rounded surface of the steeply inclined surface 31, it is possible to change the tangential angle rapidly. (See FIG. 15). Therefore, the rim width can be made smaller, and the rim portion 3 can be easily gripped at the facing position so that the hand does not slip during the stand-up operation or straddle operation (see FIG. 8).

  In addition, as a further modification of the rim portion 3 of such a bathtub 1, the curvature is reduced in order to make the gently inclined surface 32 flat, and the tangential angle between the steeply inclined surface 31 and the gently inclined surface 32 is further reduced. There is one that changes the value more rapidly (see FIG. 9). If the gently inclined surface 32 is brought close to a flat surface, it is possible to improve a sense of stability when a hand is placed on such a gently inclined surface 32 to deposit weight (see FIG. 6).

  Further, as in the modification shown in FIG. 10, the gently inclined surface 32 may be gently inclined downward toward the inside of the bathtub. It will be as follows if this example is demonstrated contrasting with a comparative example (refer FIG. 20).

  That is, generally, if the fingertip hooked on the finger rest portion 4 is higher than the user's wrist placed on the steeply inclined surface 31, the burden on the user during the rising operation of the user is further increased. It can be reduced and is preferable. On the other hand, if the gently inclined surface 32 is gently inclined upward toward the inside of the bathtub or is made horizontal, the fingertip hooked on the finger rest 4 with respect to the base of the palm becomes a relatively low position. The side of the user can be easily opened during operation (see FIG. 20). If it does so, it is unpreferable from a viewpoint of reducing the burden at the time of a user's standup.

  In this respect, in this embodiment, since the gently inclined surface 32 is gently inclined downward toward the inner side of the bathtub (see FIG. 10 and the like), the fingertips hooked on the finger rest portion 4 with respect to the base of the palm are compared. Therefore, the position is likely to be high (see, for example, FIG. 8). According to this, the side of the user is difficult to open during the rising operation, which is preferable in that the burden on the user can be further reduced. Specifically, the closer the inclination angle of the gently inclined surface 32 to the horizontal plane (indicated by θ1 in FIG. 16) is closer to 0, the more gently the inclined surface 32 is inclined (see FIG. 16).

  Moreover, you may form the intermediate | middle inclined surface 33 between the steeply inclined surface 31 and the gently inclined surface 32 like the modification shown in FIG. 11, FIG. In this case, the intermediate inclined surface 33 has an inclination angle (tangential angle) that is intermediate between the steeply inclined surface 31 and the gently inclined surface 32. For example, when trying to make the gently inclined surface 32 and the steeply inclined surface 31 descending toward the inside of the bathtub continuous without any surface treatment, the seam is acute or a step is generated at the seam. However, if the intermediate inclined surface 33 is provided as in the present embodiment, the level difference can be reduced and the design can be improved (see FIGS. 11 and 12). In this case, the intermediate inclined surface 33 is a region where the surface is smoothly processed by rounding the boundary between the steeply inclined surface 31 and the gently inclined surface 32.

  In the example shown in FIG. 12, the intermediate inclined surface 33 has a relatively large radius of curvature (large R), the gently inclined surface 32 has a relatively small radius of curvature (small R), and the intermediate inclined surface 33 has a radius of curvature. Intermediate (medium R). In the example shown in FIG. 11, the intermediate inclined surface 33 has a relatively large radius of curvature (large R), the intermediate inclined surface 33 has a medium radius of curvature (medium R), and the gently inclined surface 32 is substantially flat. It has become.

  Further, the intermediate inclined surface 33 may be formed so that the rim width is smaller than that of the steeply inclined surface 31 and the gently inclined surface 32 as in the example shown in FIGS. 11 and 12. When the intermediate inclined surface 33 is provided between the steeply inclined surface 31 and the gently inclined surface 32 with the main purpose of contributing to the relief of the level difference and the improvement of the design, the user's rising operation and straddling operation The meaning of supporting any of the above is weak and does not greatly contribute to these operations. Therefore, in this case, the rim width of the intermediate inclined surface 33 may be reduced (see FIGS. 11 and 12).

  As described so far, according to the bathtub 1 of the present embodiment, when a user in a bathing posture tries to stand up, the burden on the user during the stand-up operation is reduced, and the stand-up operation is realized easily. be able to. Moreover, according to this bathtub 1, since the gentle inclined surface 32 as mentioned above is ensured, there exists an advantage that a bath lid (illustration omitted) is hard to slide down to the bathtub 1. FIG. Moreover, since the configuration for realizing this can be expressed as a feature on the surface, such as the shape of the rim portion 3, it can be easily applied to existing products. Furthermore, the bathtub 1 of the present embodiment is an ergonomic one that can be achieved by focusing on the structure of the bathtub 1 and its rim 3 while considering the general and universal operation of the user. Therefore, it is also characteristic in that it can naturally embody a stand-up operation with a small burden on many users without any manual attached.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, as the finger hanging portion 4 provided at the lower position on the outer side of the rim portion 3, the finger hanging portion 4 formed of a recess formed in the bathtub wall 12 is illustrated (see FIG. 3 and the like) This is only a preferred example, and in addition, in the bathtub 1 in which the finger-hanging portion 4 is formed using a horizontal step between the outer side edge of the rim portion 3 and the bathtub wall (tub bathtub apron) 12. It is also possible to apply the present invention (see FIG. 13).

  Moreover, although this invention is especially suitable when applied to the bathtub 1 in which the finger-hook part 4 is formed in both sides seeing from the user of a bathing attitude | position, an application range is not restricted to this. For example, in the case of the bathtub 1 arranged close to the wall of the bathroom unit, it is difficult or unnecessary to form the finger hanging portion 4 on the unit wall side, and the finger hanging portion 4 is formed only on the washing place 11 side. There are many. In such a bathtub 1, even when the present invention is applied only to the rim portion 3 on one side (the rim portion on the side of the washing place 11), it is possible to reduce the burden on the user during the rising operation and to make the rising operation easy. It is possible to achieve the desired effect. That is, by forming the steeply inclined surface 31 and the gently inclined surface 32 (and the intermediate inclined surface 33) symmetrical to the washing place 11 side on the rim portion 3 on the unit wall side, it is possible to prevent the side from opening during the rising operation. (See FIG. 4 etc.).

1: Bathtub 2: Inner tank part 3: Rim part 4: Finger hook part 4a: Upper position 4b: Lower position 31: Steeply inclined surface (first upper surface part)
32: Slightly inclined surface (second upper surface portion)
33: Intermediate inclined surface (third upper surface portion)

Claims (5)

A bathtub,
An inner tub that can store bathtub water;
A rim portion that is an upper end edge of the inner tub portion and is within a range of 110 mm from an outer peripheral end of the upper surface of the bathtub ;
Provided below the position of the outer side of the rim portion, possess a finger hook portion capable of hooking the user's fingertip, the,
A push-up force is applied to the upper surface of the rim portion on the inner tub portion side so that a user seated in the bathtub grasps the rim portion and moves up to tighten the side of the user. as it is possible with connects the position below the upper position than the finger grips the finger grips, steep down towards the tank side at an inclination angle of 30 to 70 ° to the horizontal plane An inclined first upper surface portion is formed,
On the upper surface of the rim portion on the finger-hanging portion side, the user can go in and out of the bathtub so that the user can leave his / her weight without slipping his hand when gripping the rim portion and straddling the rim portion. As described above, a second upper surface portion having a smaller inclination than the first upper surface portion is formed ,
The bathtub, wherein the second upper surface portion has a rim width smaller than that of the first upper surface portion . It said first upper surface portion is with rounded formed into a round shape from a position above the finger rest portion to a position lower than the finger grips,
The second upper surface portion is a surface different from the first upper surface portion, and is formed by a surface having a smaller inclination than a virtual round surface obtained by extending the first upper surface portion. The bathtub according to claim 1 . Said second upper surface portion, tub according to claim 2, characterized in that the gently inclined downward toward the tub interior. A third upper surface portion having an intermediate inclination angle between the first upper surface portion and the second upper surface portion is formed between the first upper surface portion and the second upper surface portion. The bathtub according to claim 2 characterized by things. The bathtub according to claim 4, wherein the third upper surface portion has a rim width smaller than that of the first upper surface portion and the second upper surface portion.

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