JP3514154B2 - Mounting structure of the device case to the toilet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a device case on a toilet bowl.

[0002]

2. Description of the Related Art Conventionally, when attaching a device case containing various devices such as a hot water washing device and a warm air generator to the rear part of the toilet bowl, the front and rear of the device case are attached to the rear part of the toilet bowl by bolts and nuts, respectively. ing.

However, in the above conventional example,
Since the front and rear of the device case are attached to the rear part of the toilet with bolts and nuts, etc., there are many attachment points with bolts and nuts, and the installation work is troublesome.

Therefore, it is conceivable that only a part of the front and rear direction of the device case is attached to the rear part of the toilet with bolts, nuts and the like, but this causes a problem that the attachment of the device case is not stable.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the device case can be easily and reliably attached to the rear portion of the toilet bowl, and the left and right sides can be positioned. Can be installed so that the device case does not shift in the same direction, and the engaging part of the device case can be smoothly engaged with the rear edge of the opening in the rear part of the toilet bowl. It is an object of the present invention to provide a structure for mounting a device case on a toilet bowl that can be mounted so that it does not exist.

[0006]

In order to solve the above-mentioned problems, a mounting structure of a device case according to the present invention to a toilet bowl is provided with an opening 2 on the upper surface of the rear part of the toilet bowl 1 and on the rear part of the lower surface of the device case 3. The provided engaging portion 4 is engaged with the rear end edge of the opening 2 at the rear of the toilet 1, and the front of the device case 3 is fixed near the front of the opening 2 of the toilet 1 via the connecting metal fitting 5. It is characterized by being attached by means of a tool 10. With such a configuration, when the device case 3 is attached to the toilet bowl 1, the engagement portion 4 at the rear portion of the device case 3 is engaged with the rear end edge portion of the opening 2 at the rear portion of the toilet bowl 1 and the device Only the front part of the case 3 needs to be attached by the fixing tool 10 via the connecting metal fitting 5, and thus, the attachment part by the fixing tool 10 only needs to be the front part, which facilitates the attachment.

Further, the engaging portion 4 is engaged with the rear end edge portion of the opening portion 2 provided on the upper surface of the rear portion of the toilet bowl 1 from the front, and the rear end edge portion of the opening portion 2 provided on the upper surface of the rear portion of the toilet bowl 1. It is preferable to provide a positioning rib 6 for positioning the engaging portion 4 in a direction orthogonal to the engaging direction. With such a configuration, when the engagement portion 4 is engaged with the rear end edge portion of the opening portion 2 from the front, the engagement portion 4 is positioned in the direction orthogonal to the engagement direction (that is, the left-right direction) so as not to move. It is possible.

The engaging portion 4 is composed of an L-shaped piece 7 having an L-shaped cross section so that the engaging portion 4 is engaged with the rear end edge portion of the opening 2 provided on the upper surface of the rear portion of the toilet 1, It is preferable that a plurality of ribs 8 are arranged in parallel along the upper surface of the L-shaped piece 7. With such a configuration, when the engaging portion 7 is inserted into the rear end edge portion of the opening 2 provided on the upper surface of the rear portion of the toilet bowl 1 from the front and engaged, the rear end edge portion of the toilet bowl 1 made of ceramics The plurality of ribs are inserted while being in contact with the lower surface of the toilet in a planar state, and the engaging portion 4 of the opening 2 provided on the upper surface of the rear portion of the toilet bowl 1 smoothly without resistance. The rear edge can be engaged from the front.

Further, it is preferable that the upper edge portion of the lateral piece of the rib 8 is rounded. With such a configuration, when the rib 8 is inserted from the front into the rear end edge of the opening 2 provided on the rear upper surface of the toilet 1, there is a rounded portion at the upper edge of the rib 8. Therefore, it can be inserted and engaged without resistance.

Further, it is preferable that the front shift prevention portion 9 provided on the front portion of the lower surface of the device case 3 is made to closely face the front edge portion of the opening 2 on the upper surface of the rear portion of the toilet bowl 1. With such a configuration, the front shift prevention unit 9 can position the device case 3 in front of the device case 3 and prevent the device case 3 from being displaced forward.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.

A toilet bowl 1 is shown in FIGS. 1 and 2. The toilet bowl 1 is made of pottery, and a bowl 21 having an opening 90 at the upper side is formed in the toilet bowl 1. Further, a storage space 11 is provided inside the rear portion of the toilet bowl 1, and The upper surface is open to form an opening 2, and the opening 2 is an opening above the storage space 11 and the storage space 11 is formed.
A case body 12 is internally provided from the upper opening 2 therein. A mounting hole 13 is provided in the front wall of the case body 12, and a trap portion 16 which is rotatable and vertically reversible is inserted and mounted in the mounting hole 13, and most of the trap portion 16 is inside the case body 12. The connection portion 14 at the front end of the trap portion 16 that is arranged is projected from the case body 12 to the outside. The connecting portion 14 of the trap portion 16 is fitted and connected to the bowl drain port 15 formed at the rear end portion of the bowl 21.

The trap portion 1 arranged in the case body 12
Reference numeral 6 denotes a trap driving means, which has a rear end, which is a free end, of the trap portion 16 and is vertically reversibly rotatable. In the embodiment shown in the accompanying drawings, the trap portion 16 is made of a soft material and has a bellows shape, and the rotating body 17 rotatably attached to the case main body 12 has a trap portion 16.
The rotating body 17 is connected to the rear end portion of the case body 12 so as to be rotated by a motor constituting a trap driving means arranged outside the case body 12. Therefore,
When the motor is rotated in one direction, the free end of the trap portion 16 is turned downward, and when the motor is rotated in the opposite direction, the free end of the trap portion 16 is turned upward. Turn to.

A drain hole 18 is provided in the lower portion of the case body 12, and an external drain pipe 19 is connected to the drain hole 18.
Therefore, the bowl 2 is provided by the bowl discharge port 20 of the bowl 21, the trap portion 16 case body 12, and the external drain pipe 19.
A drainage channel 20 extending from 1 is constructed.

As shown in FIG. 1, a device case 3 for accommodating various devices such as a warm water washing device and a hot air generator is attached to the upper surface of the rear part of the toilet bowl 1. A water supply passage 22 for supplying water to the bowl 21 is arranged in the device case 3, and a tip portion of the water supply passage 22 is a rim portion for water passage formed at an upper end opening edge portion of the bowl 21 of the toilet bowl 1. , And the other end is connected to a water pipe. In the middle of the water supply passage 22, a water supply means 2 including a water supply solenoid valve for opening and closing the water supply passage 22.
3 is provided.

A toilet seat 24 and a toilet lid 25 are rotatably attached to the apparatus case 3, and a warm water washing device is internally provided in the apparatus case 3, and a bottom washing nozzle and a bidet washing nozzle are provided. Now, you can wash your bottom and bidet. In addition, a warm air generator is installed in the device case 3, and the air sucked in from inside the toilet bowl 1 or outside the toilet bowl 1 is heated by a heater to generate hot air from the air outlet 26 provided outside the device case 3. You can heat it up by blowing it out.

The device case 3 is a case bottom plate 3 made of synthetic resin.
a and a cover body 3b made of synthetic resin attached to the case bottom plate 3a. The case bottom plate 3a is shown in FIGS. 10 to 12, and a locking portion 4 is projectingly provided on the rear portion of the lower surface of the case bottom plate 3a. The engaging portion 4 is composed of an L-shaped piece 7 having an L-shaped cross section.
A plurality of L-shaped ribs 8 are arranged side by side along the upper surface of the character shape. The upper edge of the lateral piece of the rib 8 is rounded to form a rounded portion 8a.

A front shift prevention portion 9 is vertically provided at a substantially central portion of the front portion of the lower surface of the case bottom plate 3a. Furthermore, the case bottom plate 3
On both sides of the front part of the lower surface part of a, there are provided upward concave portions 33 that open downward and outward, and a fixed wall portion 27 stands upward from the outer end portion of the upper surface portion of the upward concave portion 33. The fixed wall portion 27 is provided with a recess 28 that opens at least outward and downward, and a hole 29 (a screw hole in the embodiment) is provided in the center of the recess 28. The lower end portion of the cover body 3b, which is open to the lower side, is fitted and attached to the case bottom plate 3a. With the cover body 3b attached, the insertion hole 31 provided at the lower end portion of the side piece 30 of the case body 3b and the above-mentioned The hole 29 provided in the recess 28 is opposed.
Further, the portion of the side piece portion 30 where the insertion hole 31 is provided has a recess 32 on the inner surface side.

On the lower surface of the rear edge of the opening 2 of the toilet 1,
As shown in FIG. 7, when the engaging portion 4 is inserted into the rear end edge portion of the opening 2 and engaged with each other, the engaging portion 4 is in a direction orthogonal to the engaging direction (the direction from the front to the rear) (that is, the left-right direction). ) Positioning ribs 6 are provided for positioning and preventing the displacement in the direction orthogonal to the insertion direction.

As shown in FIG. 15, connecting fittings 5 are attached to both sides near the front of the opening 2 of the toilet bowl 1. The connecting fitting 5 is as shown in FIG. 18, and is constructed by vertically projecting a vertical piece 35 from one end of the horizontal piece 34. The horizontal piece 34 is provided with rising edge piece portions 34a on both sides. In addition, a large-diameter hole 36 is provided in the substantially central portion of the horizontal piece 34, and an insertion hole 37 is provided in the vertical piece 34. As shown in FIG. 5, holes 38 are provided on both sides near the front of the opening 2 of the toilet bowl 1. Then, the horizontal pieces 34 of the connecting fitting 5 are respectively connected to the openings 2 of the toilet bowl 1.
Place the bolts 39 on the upper surfaces of both sides near the front part, insert the bolts 39 from the large-diameter holes 36, and insert the bolts 39 into the holes 38.
The lower end of 9 is attached by screwing with a nut 40. At this time, the large-diameter hole 36 is set to be slightly larger than the bolt 39 so that the large-diameter hole 36 can move laterally with respect to the bolt 39 by the amount of play of the large-diameter hole 36. Therefore, even if there is a manufacturing error in the toilet bowl 1 made of earthenware, it is possible to adjust the position of the connecting fitting 5 to the exact position as designed by moving the connecting fitting 5 at the large diameter hole 36 portion with respect to the bolt 39. Has become.

Here, when attaching the connecting fittings 5 to both sides near the front part of the opening 2 of the toilet bowl 1, an installation jig 41 as shown in FIG. 19 is used.

The construction jig 41 shown in FIG. 19 is provided with an operation opening 41b in the central portion of a plate-like body 41a having the same outer shape as the upper surface of the rear part of the toilet bowl 1, and the operation opening 4 of the plate-like body 41a.
A plurality of positioning protrusions 41c are provided on the lower surface of the front of the plate 1b downward, and vertical piece positioning recesses 41d are provided on both sides of the front of the plate-like body 41a. Second opening 41e for operation slightly inside the place 41d
Are formed and configured.

Then, the horizontal pieces 34 of the connecting fittings 5 are placed on the vicinity of the front part of the opening 2 on the upper rear surface of the toilet bowl 1, the bolt 39 is inserted from the large diameter hole 36, and the bolt 39 is opened. The plate-shaped body 41 of the construction jig 41 is placed on the upper surface of the rear portion of the toilet bowl 1 in a state where the lower end portion of the bolt 39 is loosely screwed into the nut 40 and the outer peripheral end of the plate-shaped body 41 is placed in the toilet bowl. Aligning with the outer peripheral edge of the rear upper surface of the positioning projection 41c
Is brought into contact with and aligned with the front edge of the opening 2 provided on the upper surface of the rear portion of the toilet 1, and in this state, the horizontal piece 34 is opposed to the second operation opening 41e and the vertical piece 35 is positioned vertically. Face the recess 41d, shift the connecting fitting 5 in the horizontal direction to fit the vertical piece 34 into the vertical piece positioning recess 41d, and position it at the proper position. Then, from the operation opening 41b. A hand is put into the opening 2 provided on the upper surface of the rear part of the toilet 1, the nut 40 loosely screwed to the lower end of the bolt 39 is locked by a spanner or other jig, and the operation second opening 41e is provided. The exposed upper end of the bolt 39 is locked by a jig such as a screwdriver or a spanner, and the bolt 39 or the nut 40 is rotated to be fully tightened and fixed.
After fixing, the construction jig 41 is lifted up and removed, whereby the connecting metal fittings 5 are attached to the regular positions on both sides near the front of the opening 2 at the rear of the upper surface of the pottery toilet 1 as designed. Is something that can be done.

To mount the device case 3 on the upper surface of the rear portion of the toilet bowl 1, the engaging portion 4 provided on the rear surface of the lower surface of the device case 3 is tilted downward so that the rear end is downward. The opening 2 at the rear of the toilet 1 as shown by the arrow A in FIG.
The front end of the device case 3 tilted obliquely downward is rotated downward as shown by an arrow B in FIG. The front-shift prevention part 9 hung on the portion is made to closely face the front edge of the opening 2 at the rear of the upper surface of the toilet 1. And the case bottom plate 3a
The vertical piece 35 is inserted between the fixed wall portion 27 and the side piece portion 30 of the cover body 3b, the fixing tool 10 is inserted from the insertion hole 31 of the side piece portion 30 and the insertion hole 37 of the vertical piece 35 is inserted. The tip of the fixture 10 is attached to the hole 29 provided in the fixed wall 27. In the embodiment, the fastener 10 is a screw tool and the hole 2 is used.
Since 9 is a screw hole, it is attached by screwing the tip of the screw tool into the screw hole. Here, as shown in FIG.
The vertical piece 35 includes a concave portion 28 provided on the outer surface of the fixed wall portion 27,
It is fitted into the recess 32 formed on the inner surface of the cover body 3b. Also, as shown in FIG. 16B, the horizontal piece 34,
The head of the bolt 39 is housed in the upward recess 33 formed on the lower surface of the case bottom plate 3a, and the rising edge piece 34a of the connecting fitting 5 is formed on the lower surface of the case bottom plate 3a of the device case 3. The front wall portion 33a of 33 closely faces. In mounting the device case 3 described above, by adjusting the engagement depth of the engaging portion 4 with the rear end edge of the opening 2 at the rear of the toilet 1, the manufacturing error of the toilet 1 made of earthenware is absorbed. Then, the position of the device case 3 is adjusted.

As described above, the device case 3 is attached to the upper surface of the rear part of the toilet bowl 1 by the engagement of the engaging portion 4 at the rear part, and the fixing device 10 is attached only to the front part of the device case 3 using the connecting fitting 5. Is installed via this, and as a result,
The fixing part 10 can be easily attached because only the front part needs to be attached.

By the way, when inserting the engaging portion 4 provided at the rear portion of the device case 3 into the rear end edge portion of the opening 2 provided at the upper surface of the rear portion of the toilet 1 from the front and engaging with the engaging portion 4,
Since a plurality of ribs 8 are arranged side by side along the upper surface of the L-shaped piece 7 constituting the above, when inserting as shown in FIG.
The rib 8 is inserted while being in contact with the lower surface of the rear end edge portion of the opening 2 while being in contact with the lower surface of the rear end edge portion of the opening portion 2. Even if the lower surface of is made of ceramics, it can be smoothly inserted and engaged with less resistance even if it is uneven. Moreover, in addition to this, since the upper edge of the lateral piece of the rib 8 is rounded to form the rounded portion 8a, the rib 8
Is inserted not in line contact but in point contact with the lower surface of the rear end edge of the opening 2, so that the device case 3 is inserted obliquely downward so that the rear end is lowered as shown in FIG. However, the engaging portion 4 can be easily and smoothly engaged.

When the engaging portion 4 is inserted into the rear end edge portion of the opening 2 provided on the upper surface of the rear portion of the toilet bowl 1 from the front to engage with the rear portion of the opening portion 2 provided on the upper surface of the rear portion of the toilet bowl 1. The edge portion is positioned by the positioning rib 6 in a direction orthogonal to the engaging direction of the engaging portion 4, and is engaged when the engaging portion 4 is engaged with the rear edge portion of the opening 2 from the front. Positioning is performed in the direction orthogonal to the combined direction (that is, the left-right direction) and does not move, and the left-right direction is positioned.

Further, as shown in FIG. 17, the device case 3
In the attached state, the front slip prevention portion 9 hung on the lower surface of the device case 3 closely opposes the front edge of the opening 2 at the rear of the upper surface of the toilet 1, and the rising of the connecting fitting 5 attached to the toilet 1. Since the edge piece portion 34a closely faces the front wall portion 33a of the upward concave portion 33 formed on the lower surface portion of the case bottom plate 3a of the device case 3, when the pushing force from the rear is applied to the device case 3, The deviation prevention portion 9 can prevent the deviation from the front by hitting the front edge portion of the opening 2, and when the pushing force from the front is applied to the device case 3, the front wall portion 33a of the upward recess 33 is connected. Rising edge piece 3 of metal fitting 5
It is possible to prevent the rearward displacement by hitting 4a.

Next, the operation of using the toilet bowl 1 will be described. In the initial state, the rear end portion of the trap portion 16 is directed upward as shown in FIG. 2 and the water 45 is stored in the bowl 21 and the trap portion 16. In this state, therefore, stools such as urine and urine are used. After the toilet is finished, the hot water washing device installed in the device case 3 is operated to wash the local part of the human body. After cleaning the local area of the human body with the warm water cleaning device in this way, a cleaning switch (not shown) is operated. When the washing switch is operated to input the ON signal of the washing switch to the control unit (not shown), the water supply means (not shown) is opened, and water is supplied from the water supply passage 22 via the rim portion to the water supply passage 22 shown in FIG. It is supplied to the bowl 21 as indicated by the arrow. A few seconds (for example, about 6 to 8 seconds) after the water supply means 23 is turned on, the trap drive means is driven to reversely drive the trap portion 16 so that the rear end faces downward (FIG. 3 → FIG. 4). In this way, the trap portion 16 is reversely driven so that the rear end thereof faces downward, and the state in which the rear end of the trap portion 16 remains downward is maintained for several seconds (for example, about 3 seconds), and as shown in FIG. Drain water. When the drainage is completed, the trap driving means drives in the opposite direction to drive the rear end of the trap portion 16 so as to face upward, and thereafter, the water supply is continued until a predetermined amount of water is accumulated in the bowl 21 and the trap portion 16. The water supply means 23 is turned off when a predetermined amount of water is accumulated.

[0030]

As described above, in the invention according to claim 1 of the present invention, an opening is provided on the upper surface of the rear portion of the toilet bowl, and the engaging portion provided on the rear portion of the lower surface of the device case is provided on the rear portion of the toilet bowl. Since the front part of the device case is attached to the vicinity of the front part of the opening of the toilet via the connecting metal fittings by the fasteners, the device case is attached to the toilet when connecting to the rear edge of the opening. It suffices to engage the rear engaging part with the rear edge of the opening of the rear part of the toilet bowl, and attach only the front part of the device case with the fastener via the connecting metal fittings. Since only the front part is required, the device case can be easily and surely attached.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, in addition to the effect of the invention of claim 1, the engaging portion is provided from the front to the rear end edge portion of the opening provided on the upper rear surface of the toilet bowl. A positioning rib for positioning the engaging portion in the direction orthogonal to the engaging direction is provided at the rear end edge portion of the opening that is engaged and is provided on the upper surface of the rear portion of the toilet bowl. When it engages with the rear edge of the toilet, it can be positioned in the direction orthogonal to the engaging direction (that is, left-right direction) so that it does not move, and the device case can be attached to the exact position on the upper rear surface of the toilet bowl. It is a thing.

According to the invention of claim 3, in addition to the effect of the invention of claim 1, the engaging portion is provided from the front to the rear end edge portion of the opening provided on the upper rear surface of the toilet bowl. It is composed of an L-shaped piece having an L-shaped cross section so as to be engaged, and L
Since a plurality of ribs are arranged side by side along the upper surface of the character-shaped piece, when the engaging portion is inserted from the front into the rear end edge portion of the opening provided on the upper rear surface of the toilet bowl and engaged, Instead of being inserted in contact with the lower surface of the rear end edge of the toilet bowl made in a planar state, a plurality of ribs are inserted in contact with the lower surface of the toilet bowl, so that the engaging portion can be smoothly connected to the upper surface of the rear portion of the toilet bowl without resistance. Since the rear end edge of the opening 2 provided can be engaged from the front, the engaging portion can be easily engaged, and the engaging portion can be reinforced by a plurality of ribs to increase the strength of the engaging portion. It is possible to improve the strength, and to increase the attachment strength of the engaging portion of the device case to the toilet bowl.

According to the invention of claim 4, in addition to the effect of the invention of claim 3, since the upper edge portion of the lateral piece of the rib is rounded, the rib is a toilet bowl. When inserting from the front into the rear end edge of the opening provided on the rear upper surface of 1, the point contact at the rounded part of the upper edge of the rib allows smooth insertion without any resistance. , The engagement can be done more smoothly.

Further, in the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the forward displacement prevention provided on the front part of the lower surface of the device case is prevented. Since the part is closely opposed to the front edge of the opening on the upper surface of the rear part of the toilet bowl, the front misalignment prevention part can position the device case in front and prevent the device case from being displaced forward.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a cross-sectional view showing the same cleaning operation as above, in a state where water is supplied with the rear end of the trap portion facing upward.

FIG. 4 is a cross-sectional view showing the same cleaning operation as above, with the rear end of the trap portion facing downward and discharging dirt and sewage.

FIG. 5 is a plan view of the toilet bowl of the same.

FIG. 6 is a side sectional view of the toilet bowl of the above.

7 is a cross-sectional view taken along line XX of FIG.

FIG. 8 is a side view of the above-mentioned device case.

FIG. 9 is a plan view of the device case of the above.

FIG. 10 is a plan view of the case bottom plate of the above.

FIG. 11 is a side view of the case bottom plate of the above.

FIG. 12 is a front view of the case bottom plate of the above.

FIG. 13 is an explanatory view showing a state in which the case body of the above is attached to the upper surface of the rear portion of the toilet bowl.

FIG. 14 is a cross-sectional view showing a state in which the above-mentioned engaging portion is engaged with the rear end edge portion of the opening provided on the upper surface of the rear portion of the toilet bowl.

FIG. 15 is a plan view showing a state in which the above connecting fitting is attached to a toilet bowl.

16 (a) is a cross-sectional view showing a state in which the device case is being attached to the toilet via the coupling fitting, and FIG. 16 (b) is a cross-sectional view of the same after attachment.

FIG. 17 is an explanatory diagram of a structure in which the above device case is prevented from shifting in the front-rear direction with respect to the toilet bowl.

FIG. 18 shows a connecting fitting used in the same as above, (a) is a plan view, (b) is a side view, and (c) is a front view.

FIG. 19 shows a construction jig used in the above, (a) is a plan view, (b) is a front view, and (c) is a side view.

[Explanation of symbols]

1 toilet bowl 2 openings 3 device case 4 Engagement part 5 connection metal fittings 6 Positioning rib 7 L-shaped piece 8 ribs 9 Forward deviation prevention section 10 Fastener

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuyuki Okumura 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Takahiro Nakamura, 1048, Kadoma, Kadoma City, Osaka Matsushita Electric Works, Ltd. (72) Inventor Yoshihiro Nishizaki, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Inventor, Yoshiro Matsushita, 1048, Kadoma, Kadoma, Osaka City, Matsushita Electric Works, Ltd. (56) Bibliography 5-14268 (JP) , U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E03D 9/08 A47K 13/00-17/02 E03D 1/26

Claims (5)

(57) [Claims] 1. An opening is provided on an upper surface of a rear portion of a toilet bowl, and an engaging portion provided on a rear surface of a lower surface of a device case is engaged with a rear end edge portion of an opening portion of a rear portion of the toilet bowl, so that a front portion of the device case is opened. A structure for attaching a device case to a toilet, which is characterized in that it is attached to the front part of the opening of the toilet by a fastener through a connecting metal fitting. 2. The engaging portion is engaged with a rear end edge portion of an opening provided on a rear upper surface of the toilet bowl from the front, and an engaging portion is provided on a rear end edge portion of the opening provided on the upper surface of the rear portion of the toilet bowl. The mounting structure for mounting a device case to a toilet according to claim 1, further comprising a positioning rib for positioning in a direction orthogonal to the engaging direction. 3. An L-shaped piece having an L-shaped cross section so that the engaging portion is engaged with a rear end edge portion of an opening provided on the rear upper surface of the toilet bowl from the front. 2. A structure for attaching a device case to a toilet according to claim 1, wherein a plurality of ribs are provided side by side along the upper surface of the device. 4. The structure for attaching a device case to a toilet according to claim 3, wherein the upper edge of the lateral piece of the rib is rounded. 5. The front shift prevention portion provided on the front portion of the lower surface of the device case is arranged on the upper surface of the rear portion of the toilet in close proximity to the front edge portion of the opening. 4. A structure for mounting the device case according to any one of 4 to a toilet bowl.