JPH0861828A - Scupper trap apparatus - Google Patents

Abstract

PURPOSE: To prevent a cap of a scupper from severely floating from a predeter mined position owing to a pressure difference between the inside and outside of the refrigerator produced following opening and closing of a refrigerant body door in a scupper trap apparatus for a refrigerator etc. CONSTITUTION: In a scupper 20 in a refrigerator body 1, upward grooves 25 are formed in a pair of protrusions 22 provided on the internal peripheral surface of a drain 8, and a stopper part 28 on a lower end of a protruded piece 27 hung from a cap 21 is engaged with the protrusions 22 at the positions of the grooves 25 with the rotation of the cap 21, and further the lower end of a cylindrical peripheral wall 13 of the cap 21 is dipped.in water stored in an annular recessed part 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage trap device in a refrigerator, a freezer, a cold storage, or the like.

[0002]

2. Description of the Related Art In conventional refrigerators, freezers, chilled storages, etc., as shown in FIGS. 5 and 6, the storage box main body 1 has an inner box 2, an outer box 3 and both boxes 2 and 3. It is configured in a box shape by the heat insulating material 4 filled in, and an opening / closing door (not shown) is attached to the front opening side of the box body 1
A drain port 5 and a cap 6 are installed at the bottom of the. The drainage port 5 is formed by integrally forming an annular inclined portion 7 formed in the middle, a cylindrical drainage channel 8 hanging down from the central portion thereof, and a cylindrical wall portion 9 rising from the inclined portion 7. The inner peripheral surface, the upper surface of the inclined portion 7 and the outer peripheral surface of the tubular wall portion 9 form an annular recess 10, and the upper surface of the tubular wall portion 9 is provided with a plurality of small projections 11. On the other hand, cap 6
A knob 12 is provided on the top surface, and the knob 12 is placed on the small protrusion 11 of the cylindrical wall portion 9, and the cylindrical peripheral wall 13 thereof is suspended in the annular recess 10 of the drainage port 5.

Therefore, drainage generated when defrosting the inside of the refrigerator or cleaning the inside of the refrigerator is collected in the drainage port 5 at the bottom of the refrigerator main body 1 and stored in the annular recess 10 in the stored water 14. When the lower end of the cylindrical peripheral wall 13 of the cap 6 is immersed and the stored water level exceeds the height of the cylindrical wall portion 9, the small projection 11 causes a gap between the back surface of the cap 6 and the top surface of the cylindrical wall portion 9. The stored water 14 flows into the tubular wall portion 9 through the gap 15 formed in
Although it is discharged to the outside of the refrigerator through the drainage channel 8 below, since the lower end of the cap cylindrical peripheral wall 13 is immersed in the stored water 14, the inside and the outside of the refrigerator are drained by the cap 6 and the stored water 14. The mouth 5 is airtightly blocked, so that cold air in the refrigerator is prevented from flowing out of the drainage outlet 5 and external air is prevented from flowing into the refrigerator through the drainage outlet 5.

However, when the opening / closing door of the cabinet main body 1 whose inside is kept airtight is suddenly opened, the inside of the cabinet main body 1 momentarily becomes negative pressure, so that the cap 6 in the drainage port 5 is drained. When the inside air is pushed up and the open / close door of the storage body 1 is closed, the warm outside air flowing into the storage body 1 is cooled and contracted by the cold air inside the storage body 1, so that the inside of the storage compartment becomes negative. When the pressure is applied, the cap 6 in the drainage port 5 is also pushed up by the outside air in the drainage channel 8, and in any case, the cap 6 is largely lifted up, and the lower end of the cylindrical peripheral wall 13 is higher than the stored water 14. As a result, the cap 6 and the stored water 14 do not fulfill the trap function, and as a result, the outside air flows into the cabinet body 1 from the drainage channel 8,
Outside odors may enter the cabinet body 1 or cause frost or ice to build up in the cabinet, and when the outside air suddenly flows into the cabinet from the drainage channel 8 as described above. In this case, there is a possibility that dust and the like adhering to the drainage channel 8 may be blown off and scattered into the storage, which is not preferable for hygiene.

Also, in the drain trap disclosed in Japanese Utility Model Laid-Open No. 63-40783, a plurality of protrusions extending inward in the radial direction are formed on the inner surface of the bell-shaped upper lid, and the upper lid is lowered into the drain outlet. The upper lid is prevented from being lifted up by rotating and inserting and fitting the protrusion into the L-shaped groove of the drainage pipe. However, if external shocks from inside and outside the store, such as negative pressure in the store, wind pressure from the drain pipe, and large amount of drainage from the store, are applied to the top over a long period of time, the rotating position of the top gradually changes. There is a possibility that the protrusions of the upper lid may move to the vertical groove portion of the drain pipe L-shaped groove due to misalignment, and at this time, due to the external impact, the protrusions are guided by the vertical groove portion of the drain pipe and largely lifted, and the upper lid is drained. There is a risk that it will come off and lose the trap function,
In addition to the same problems as in the conventional device, the inner surface of the upper lid above the protrusion and the lateral groove of the drain pipe L-shaped groove are both undercuts in the mold structure. There is a problem that the cost of the mold is significantly increased because the work is complicated, such as sliding it to separate it from the part, or constructing the mold in a split mold.

[0006]

DISCLOSURE OF THE INVENTION The present invention is directed to a drain port trap device at the bottom of a cabinet main body, where the cap of the drainage port is moved from a predetermined position due to a pressure difference between the inside and outside of the cabinet caused by opening and closing of the cabinet body door. It tries to prevent it from coming off.

[0007]

Therefore, the drain trap device according to the present invention has a cap mounted above the drain in the drain and having a lower end of the cylindrical peripheral wall immersed in the stored water. An engaging portion projecting laterally is formed on the projecting piece that hangs down from the protruding piece, and a groove extending upward is formed on the protrusion provided on the inner peripheral surface of the drainage channel, and the engaging portion is rotated by the rotation of the cap. Is configured to be locked in the position of the groove with respect to the protrusion.

Further, the drain trap device according to the present invention has a cap mounted above the drain in the drain and having a lower end of the cylindrical peripheral wall immersed in the stored water. A locking portion projecting toward one side is formed, a boss projecting downward is formed on a protrusion provided on the inner peripheral surface of the drainage channel, and the locking portion moves below the boss by the rotation of the cap. It is configured so as to get over and be locked by the protrusion.

[0009]

Operation: That is, when the cap attached above the drainage channel in the drainage port is rotated, the laterally protruding locking portion formed on the projecting piece that hangs down from the cap causes the protrusion on the inner peripheral surface of the drainage channel. Since it is locked at the position of the upward groove formed on the projection, even if the cap is pushed up due to the pressure difference between the inside and outside of the refrigerator, the locking part of the cap is The cap can be locked in the groove to prevent the cap from coming off the mounting position above the drainage channel.

Further, when the cap mounted above the drainage channel in the drainage port is rotated, the lateral protrusion locking portion formed on the projecting piece hanging from the cap has a protrusion on the inner peripheral surface of the drainage channel. In contrast, since it is locked by overcoming the downward protruding boss formed on the protrusion, even if the cap is rotated due to a large amount of drainage from the inside of the refrigerator, the locking part of the cap is It is possible to prevent the cap from coming off from the mounting position above the drainage channel by being locked to the boss of the projection on the surface.

[0011]

Embodiments of the present invention will be described below by assigning the same reference numerals to the parts equivalent to those of the conventional device. Figure 1
In FIG. 4, a refrigerator main body 1 such as a refrigerator, a freezer, and a cold storage is formed in a box shape by an inner box 2, an outer box 3, and a heat insulating material 4 filled between the boxes 2 and 3, and a front opening thereof is formed. An opening / closing door (not shown) is attached to the side, and a drain port 20 and a cap 21 made of resin are installed at the bottom of the cabinet body 1.

The drainage port 20 is formed by integrally forming an annular inclined portion 7 formed in the middle, a cylindrical drainage channel 8 hanging down from the central portion, and a cylindrical wall portion 9 rising from the inclined portion 7.
An annular recess 10 is formed by the inner peripheral surface of the drainage port 20, the upper surface of the inclined portion 7 and the outer peripheral surface of the tubular wall portion 9, and a plurality of small projections 11 are provided on the upper surface of the tubular wall portion 9. ing.
Further, two projections 22 are provided on the inner peripheral surface of the drainage channel 8 symmetrically with respect to the axis thereof, and the projections 22 are guides extending substantially in the circumferential direction, as shown in detail in FIG. It has a portion 23, a small hemispherical or small semi-cylindrical boss 24 projecting downward at the terminal end thereof, a groove 25 extending upward, and a detent portion 26 extending downward.

On the other hand, the cap 21 is provided with a knob 12 on the top surface and a cylindrical peripheral wall 13, and a plate-shaped projecting piece 27 hangs down from the lower surface of the cap 21. Locking portions 28 that project toward each side are formed.
In this case, the maximum lateral width W1 of both locking portions 28 is smaller than the inner diameter A of the drainage channel 8, but larger than the inner diameter B of both protrusions 22, and the lateral width W2 of the protrusion 27 is larger than the inner diameter B of both protrusions 22. The width W3 of the groove 25 is smaller than the thickness t of the locking portion 28.

When attaching the cap 21 to a predetermined position of the drainage port 20, first, the cap 21 is inserted into the drainage port 20 from the inside of the refrigerator, and the engaging portion 28 of the projecting piece 27 is inserted into the drainage port 20.
The cap 21 is appropriately rotated by the knob 12 so as to be disengaged from the protrusion 22 in the inside, the protrusion piece 27 of the cap 21 is fitted into the drainage channel 8, and the cap 21 is mounted on the small protrusion 11 of the tubular wall portion 9. To place. When the cap 21 is rotated clockwise from this state when viewed from above in FIG.
Since the upper surface 29 of 8 moves along the lower surface of the guide portion 23 of the projection 22 and contacts the boss 24 of the projection 22, when the knob 12 is rotated slightly more strongly in the same direction, the boss 24 and / or the protruding piece 27 is moved. Due to elasticity, the upper surface 29 of the locking portion 28 rides over the lower portion of the boss 24, and the end surface of the locking portion 28 is projected.
By hitting the detent portion 26 of No. 2 as shown in FIG.
Is locked at the position.

As described above, the cap 21 has the cylindrical wall portion 9
When placed on the small protrusion 11 of the cap 21, since the cylindrical peripheral wall 13 of the cap 21 hangs down in the annular recess 10 of the drainage port 20, the cap 21 is placed in the stored water 14 in the annular recess 10. The lower end of the cylindrical peripheral wall 13 is immersed, and the stored water level is the cylindrical wall 9
When the height exceeds, the stored water 14 flows into the cylindrical wall portion 9 through the gap 15 formed between the back surface of the cap 21 and the top surface of the cylindrical wall portion 9 by the small protrusions 11, and Although it is discharged to the outside of the refrigerator through the drainage channel 8, since the lower end of the cylindrical peripheral wall 13 of the cap is immersed in the stored water 14, the cap 21
The inside and outside of the refrigerator are airtightly shut off at the drainage port 20 by the stored water 14, and the cold air in the refrigerator flows out of the drainage port 20 or the outside air flows into the refrigerator through the drainage port 20. Things have been prevented.

On the other hand, since the engaging portion 28 of the cap projection 27 is engaged with the projection 22 at the position of the groove 25, if the cap 21 is pushed up due to the pressure difference between the inside and outside of the refrigerator, The locking portion 28 is fitted in the groove 25 extending above the lower surface of the guide portion 23 and the boss 24, and the upper surface 29 of the locking portion 28 engages with the top surface of the groove 25, so that the above-mentioned pressure difference is eliminated. For example, the cap 21 can be immediately lowered to its original position by its own weight, and the cap 21 can
Can be prevented from coming off from the above-mentioned mounting position. At this time, as described above, the groove 25 into which the engaging portion 28 is fitted extends above the lower surface of the guide portion 23 and the boss 24, and the upper surface 29 of the engaging portion 28 is pushed upward by pushing up the cap 21. Since it is displaced above the lower surface, there is no concern that the upper surface 29 of the engaging portion will pass over the lower portion of the boss 24 and the engaging portion 28 will eventually come off the lower surface of the guide portion 23. The engagement with 28 can be reliably retained.

Further, the cap 21 is gradually rotated by an external impact such as a large amount of drainage from the inside of the cabinet body 1, and the projection 22
The upper surface 29 of the cap engaging portion 28 comes into contact with the boss 24 of the projection 22 even if the cap 21 is disengaged from the mounting position, and the cap 21 is prevented from rotating any further.
The cap 21 is always prevented from coming off from the above-mentioned mounting position of the drainage port 20.

Therefore, in any case, the above-mentioned trapping function by the cap 21 and the stored water 14 is not lost at all, so that the outside odor enters the inside of the cabinet main body 1 or the inside of the cabinet is frosted or frosted. Ice is less likely to occur, and there is no possibility that dust or the like adhering to the inside of the drainage channel 8 will be blown off and scattered into the refrigerator like the conventional device, and the inside of the refrigerator main body 1 will always be hygienic. Can be kept at In addition, since the projection 22 formed on the drainage channel 8 and the locking portion 28 of the projection piece 27 of the cap 21 have a simple structure and are not particularly difficult to manufacture, the drainage port 20 and the cap 21 are manufactured. There is no fear of increasing costs.

In addition, when the cap 21 is removed from the drain port 20, the cap 21 is placed on the small projection 11 of the cylindrical wall portion 9 by its own weight, as opposed to the above-mentioned mounting, as shown in FIG. Therefore, when the cap 21 is slightly strongly rotated counterclockwise when viewed from above in FIG. 4, the upper surface 29 of the locking portion 28 rides over the lower portion of the boss 24 in the protrusion 22 and is further rotated in the same direction. , The engaging portion 28 moves along the lower surface of the guide portion 23 and disengages from the protrusion 22 and abuts against the side surface of the detent portion 26 of the other protrusion 22. At that time, the cap 21 may be pulled up. Cap 21 because it is very simple
It has the advantage that it can be easily attached and detached.

Incidentally, the shape of the projection provided on the inner peripheral surface of the drainage path is symmetrical to that of the above-mentioned embodiment, and the cap is attached to and detached from the drainage port in the opposite direction to that of the above-mentioned embodiment. In each of the above embodiments, the number of protrusions provided on the inner circumferential surface of the drainage channel is two, but it is also possible to use one or four protrusions symmetrical with respect to the axis of the drainage channel. Furthermore, in each of the above embodiments, the small boss at the end of the guide portion of the protrusion provided on the inner peripheral surface of the drainage channel is formed by sticking a material that can retain elasticity relatively even at low temperature. Needless to say, it is also good.

[0021]

In the drain port trap device according to the present invention, even if the cap is pushed up due to the pressure difference between the inside and the outside of the refrigerator, the engaging portion of the cap is engaged with the groove of the projection on the inner peripheral surface of the drainage channel, Alternatively, since the locking portion of the cap rides over the lower portion of the boss protruding downward and is locked to the protrusion, the rotation of the cap is prevented by the locking portion contacting the boss, and thus In the case of, the cap does not come off from the mounting position above the drainage channel, so it is possible to always maintain the trap function by the cap and the stored water, and the outside air invades from the drainage channel and frost or ice inside the refrigerator It has the advantage that the inside of the cabinet body can be kept hygienic at all times by preventing the generation of dust and eliminating the possibility that dust and the like adhering to the drainage channel will be blown off and scattered inside the cabinet. .

[Brief description of drawings]

FIG. 1 is a perspective view of a main part in an embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional view of the above embodiment.

FIG. 3 is a detailed view of a main part of the above embodiment.

FIG. 4 is a perspective view of the above embodiment.

FIG. 5 is a perspective view of a main part of a conventional device.

FIG. 6 is a vertical sectional view of the conventional device.

[Explanation of symbols]

 1 Storage Main Body 8 Drainage Channel 10 Annular Recess 14 Stored Water 20 Drainage Port 21 Cap 22 Projection 24 Boss 25 Groove 27 Projection Piece 28 Locking Part

Claims (3)

[Claims] 1. A cap, which is mounted above a drainage channel in a drainage port, has a lower end of a cylindrical peripheral wall immersed in stored water,
A locking portion protruding laterally is formed on the protrusion hanging from the cap, and a groove extending upward is formed on the protrusion provided on the inner peripheral surface of the drainage channel. A drain trap device configured such that the stopper is locked to the position of the groove with respect to the protrusion. 2. A cap, which is mounted above the drainage channel in the drainage port and has a lower end of the cylindrical peripheral wall immersed in the stored water,
A locking portion projecting laterally is formed on the projecting piece hanging from the cap, and a boss projecting downward is formed on the projection provided on the inner peripheral surface of the drainage channel. A drain trap device configured such that a locking portion crosses below the boss and is locked to the protrusion. 3. A cap, which is mounted above the drainage channel in the drainage port and has a lower end of a cylindrical peripheral wall immersed in the stored water,
A locking portion projecting laterally is formed on the projecting piece hanging from the cap, and a boss projecting downward and a groove extending upward are formed on the projection provided on the inner peripheral surface of the drainage channel. Of the drainage trap device configured such that the locking portion rides over the lower portion of the boss and is locked to the protrusion at the position of the groove by the rotation of the.