JP3009130B2 - PVC resin trap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trap made of resin such as PVC, and more particularly to a small trap made of an integral PVC.

[0002]

2. Description of the Related Art In general, a trap is a trap having a trap function. Typically, a trap is formed by attaching a curved pipe to a drainage tank having a mud reservoir (for example, Japanese Utility Model Application Laid-Open No. 61-84787). In addition, a trap attached to the bottom of a drainage basin for use in houses, etc. (see, for example,
198387) is also called a trap.

[0003] The latter trap having a trap attached to the bottom of a drainage basin is PVC and is now widely used, and its structure is such that a U-trap is provided at the bottom of a body having an invert part. A trap connection port for connecting the outlet section is opened adjacent to the invert section through the overflow section.

At present, this U-trap mounting structure is now connected to the main body in a fixed state (see Japanese Utility Model Laid-Open No. 61-198387 and Japanese Utility Model Laid-Open No. 63-1653).
No. 88) and those which are always connected to the main body in a rotatable state (for example, see Japanese Utility Model Laid-Open No. 63-121677 and Japanese Utility Model Laid-Open No. 1-119470).

By the way, a typical example of a PVC trap in which the former U trap is fixedly connected to the main body is as follows.
The configuration is roughly as follows.

This will be described with reference to FIG. The PVC trap 50 is an injection-molded product, and a connection port 52 for an inspection tube for connecting an inspection tube (not shown) is formed on an upper portion of the main body 51 of the square, and an invert portion is formed on a bottom portion thereof. 5
3 and a trap connection port 55 for connecting the outlet of the U trap 54 are formed.
The overflow portion 56 is adjacent to the invert portion 53.

The inverted portion 53 and the trap connection port 55 are formed by slightly bulging the side wall of the main body 51 to reduce the diameter of the inspection pipe connection port 52.

Further, the main body 51 and the U-trap 54 are separately injection-molded and bonded and joined at a production factory or a construction site. That is, bonding is performed using the trap connection port 55 as a receiving port and the outlet of the U trap 54 as a port.

[0009]

However, such a PVC trap 50 is fully automated by program control and, in particular, is improved in a rotation removing mechanism (for example, the Japanese Utility Model 5).
(See JP-A-14829) and the like for recent injection molding machines and injection molding dies which have made great strides, and the following problems have been found.

1) Trap connection port 55 and U trap 5
In general, the work is required to apply the adhesive and then immediately bond them together, and then fix them together for about 30 seconds. As a result, productivity cannot be increased, and eventually,
It is difficult to further reduce production costs and simplify on-site construction.

2) Adhesive bonding generally employs TS bonding, so that the trap connection port 55 and the U trap 5
The outlet portion of 4 has a circular structure inevitably, and if the diameter of the connection port 52 for the inspection tube is to be reduced, the side wall of the main body 51 must be slightly bulged and formed. Tends to occur.

3) Since the main body 51 and the U trap 54 are separately formed and the U trap 54 is formed of a U-shaped tube, the center of the inspection tube connection port 52 and the entrance of the U trap 54 are formed. The distance D from the center of the portion 57 cannot be reduced.

4) Since the main body 51 and the U trap 54 are separately molded, a molding die is required.

5) If there is a molding failure at the trap connection port 55 of the main body 51 and / or at the exit of the U trap 54, the quality of the adhesive bonding is degraded.

Therefore, an object of the present invention is to solve such problems.

[0016]

The gist of the present invention to achieve this object is as follows: 1) A connection port for an inspection tube is provided at an upper portion,
A resin trap, such as a PVC trap, characterized in that the inverting part, overflow part, and outlet part of the U trap are juxtaposed on the bottom and the U trap is integrally injection-molded simultaneously with one set of molds. And 2) a trap made of resin such as polyvinyl chloride which has an outlet portion of the U trap according to claim 1 which is formed in an elliptical shape and which can be almost completely viewed from a connection port for a check tube.
Further, 3) a resin trap such as a PVC having a vertical wall on the side wall of the main body at the outlet of the U trap according to claim 1 or 2.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail with reference to two exemplary embodiments shown in the accompanying drawings. 1 is a longitudinal sectional view of a PVC trap sash according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the arrow A of FIG. 1, FIG. 3 is a detailed view of a main part of FIG. 1, and FIG. FIG. 5 is a longitudinal sectional view of another embodiment,
FIG. 6 is a plan view of FIG.

The PVC traps 1, 1A according to the embodiment of the present invention shown in FIGS. 1 and 5 each have one set (for example, when the main body 2 and the U trap 3 are injection-molded).
At least the cavity, the core, and the under-cut processing mechanism are formed as one set), and are desirably integrally molded at the same time. Preferably, the entire movable-side mold moves back and forth or up and down as much as possible. It is thus molded, and so to speak, as an integral miniature trap.

Then, this PVC trap 1,1A
For example, the diameter of the inspection port 4 is 150 mmφ, the diameter of the main pipeline connection ports 7 and 7A connected to the inverter 5 is 100 mmφ, and the diameter of the inlet 8 of the U trap 3 is 7 mm.
If it is formed in a size of 5 mmφ, it is suitable for home traps. Of course, this dimension is appropriately changed.

First, a PVC trap 1 shown in FIGS. 1 and 2 will be described. A connection port (adhesive joint receiving port) 4 for connecting a check tube (not shown) is formed on the upper portion of the main body 2, and an invert portion 5 and an overflow portion (overflow portion) are formed at the bottom. A flow portion 9) and a connecting portion 10 for a trap are formed side by side.

First, the first connection portion 10
As a design concept, the outlet 11 of the U trap 3 is integrally formed. Next, as a second design concept, the outlet 11 is formed in an elliptical shape in plan view as shown in FIG. Therefore, in the U trap 3, the shape gradually changes from the circular entrance 8 to the elliptical exit 11.

In particular, in order to improve the shape of the U trap 3, a horizontal portion is formed at the lowest U portion, and the U lowest portion is a branch point of the ellipse on the outlet side and the circle on the inlet side. for that reason,
No undercut occurs in the elliptical molding.

Next, as a third design concept, the outlet portion 11 is made to be fully visible from the inspection tube connection port 4 and, of course, the depth H to the water sealing surface of the U trap 3 is set. Is made as large as possible as before.

For this reason, a vertical portion as long as possible is adopted near the U-shaped inner arc portion 12 and the U-shaped outer arc portion 13 at the outlet portion 11 of the U trap 3.
Since the horizontal portion is formed at the lowest portion of the U, the radii R1 and R2 of each of the arc portions are smaller than those of the normal U trap.

That is, the radii R1 and R2 shown in FIG. 1 are adopted in order to make the flow passage area in each cross section of the U trap 3 substantially the same and to prevent stagnation of drainage. Incidentally, R in FIG.
2 is approximately equal to the diameter of the inlet 57 of the U trap 54, R1 in FIG. 1 is about 5 mm, and R2 is less than half the diameter of the inlet 8.

As a result, in the PVC trap 1, the distance D 1 between the center of the inspection tube connection port 4 and the center of the inlet 8 of the U trap 3 can be reduced. That is, U
The outlet portion 11 of the trap 3 is flattened into an elliptical shape and the
7 is formed along the axial direction of the
At the circular outlet of the U trap 54 shown in FIG.
First, the side wall of the main body 51 is expanded, but in the present embodiment, it can be a vertical wall.

Further, since the trap connecting portion 10 and the outlet portion 11 of the U trap 3 are integrally formed and are thin without using the structure of the receiving port and the spout, the center distance D1 is further reduced. You. When the diameter of the inspection tube connection port 4 or 52 is 150 mmφ, D1 in FIG. 1 can be reduced to 150 mm from D = 173 mm in FIG.

Also, in this PVC trap 1,
Since the swelling portion is not formed on the side wall of the main body 2 at the outlet portion 11 of the U trap 3 but is formed as a vertical wall, the outlet portion 11 as described above can be viewed entirely from the inspection tube connection port 4. At the same time, the occurrence of an undercut during injection molding can be prevented, and the mold can be released without interfering with the rotation removal operation of the U trap 3 on the entrance 8 side.

Also, in this PVC trap 1,
The outlet 11 of the U trap 3 is made elliptical along the axial direction of the inverter 5, so that the flow area of the inlet 8 and the outlet 11 of the U trap 3 can be matched, and moreover. The coaxial dead space in the main body 2 can be used.

Also, in this PVC trap 1,
Since the main body 2 and the U trap 3 are integrally molded at the same time using one set of molds, productivity is improved, mass production advantages are obtained, and production costs can be reduced. Effective laying work such as omission of trap connection work can be performed.

If the entrance 8 of the U trap 3 is formed at the spout and an elbow or a tooth is connected to the spout at the construction site, the conventional swingable trap can be used. Any direction can be obtained with this spigot, as in the case of a U-trap that is adhesively bonded in the direction of.

In the figure, reference numeral 14 denotes a leg of the main body 2;
Indicates the feet of the U trap 3, respectively.

The elliptical shape of the outlet 11 may be a semicircle, which means that it is not circular.

The invert portion 5 may be curved (curved point invert), and the number of U traps 3 may be two or more. One of the U traps can be rotated at all times. May be used.

Next, the vicinity of the overflow portion 9 of the PVC trap 1 will be described in detail with reference to the drawings. 3, the left side of the center line O is a cross section as viewed in the direction of the arrow B in FIG. 1, and the right side is a side view in the direction of the arrow C in FIG. 1, and FIG. 4 is a plan view as viewed from the direction of the arrow F in FIG.

The overflow portion 9 is provided with a rectangular weir 16 at the center thereof, and on both sides of the rectangular weir 16 are formed inclined surfaces 17, 17 connected to the vicinity of the lower end of the connection port 4 for the inspection tube. Have been.

The opening edge of the outlet portion 11 of the U trap 3 forms a surface bird 18 which is slightly inclined toward the inside of the U trap tube as shown by oblique lines in FIG.

Next, another embodiment of the present invention will be described. In FIGS. 5 and 6, the PVC trap 1A is applied to the starting point instead of the junction shown in FIG. 1 and the like. The outlet portion 11 of the U trap 3 and the invert portion 5A which is connected to the main pipeline connection port 7A and has a semicircular shape in plan view are arranged side by side with the overflow portion 9A interposed therebetween. Moreover, the pipe shaft of the U trap 3 and the connection port 7A for the main pipeline are provided.
Are located on the same straight line.

The hatched portions in FIG. 6 are slightly inclined surfaces 18A, 18A directed toward the inside of the pipe. Also,
Other configurations of the PVC trap 1A are the same as those shown in FIG. 1, and the description thereof is omitted.

The PVC trap 1, 1A constructed as described above is installed in a residential area, and drainage from a kitchen, a bathroom, etc., flows in from the entrance 8 of the U trap 3, and overflows 9, 9A. After flowing over 9A, it flows into the invert portions 5, 5A and flows out to the main pipeline. Since the wastewater is stored in the U trap 3 to a predetermined depth, the odor from the main pipeline does not flow back to the inlet 8 of the U trap 3.

Of course, the PVC trap 1, 1A can be substantially scaled up to form a PVC manhole with a trap.

[0042]

According to the first aspect of the present invention, since the main body and the U-trap are integrally and simultaneously injection-molded with one set of molds, it is possible to omit the conventional adhesive bonding work between the two, and to improve the productivity. Can be improved, and the cost can be reduced by the advantage of mass production.

In addition, the number of manual operations at the construction site and the like is reduced, and thus the reliability of the construction is improved.
It is also convenient for packing transportation, stock keeping, and replacement work depending on the result of inspection work.

According to the second aspect, in addition to the above, the entrance of the U trap is made closer to the main body by the elliptical shape of the exit of the U trap, the whole is made compact, which is convenient for installation on a small land.

In addition, the entire inspection port can be visually recognized from the small-diameter inspection cylinder connection port, which is convenient for, for example, inspecting and cleaning the trap square twice a year. In particular, even if the outlet portion is formed in an elliptical shape, it is convenient for mold release.

According to the third aspect of the present invention, in addition to the above and other objects, even in the case of a so-called main body having a small-diameter connection port for an inspection tube, not only there is no undercut portion at the time of molding due to the vertical wall, but also the visual inspection and inspection and inspection. This is convenient for inserting a cleaning tool or the like.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a PVC trap square according to an embodiment of the present invention.

FIG. 2 is a sectional view taken in the direction of arrow A in FIG.

FIG. 3 is a detailed view of a main part of FIG. 1;

FIG. 4 is a detailed view of another main part of FIG. 1;

FIG. 5 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a conventional example.

[Explanation of symbols]

1 ... Trap, 2 ... Masu body, 3 ... U trap, 4
... inspection port, 5 ... invert, 9 ... overflow, 1
1 ... Exit

Claims (3)

(57) [Claims] 1. A main body and a U-trap, which are provided with a connection port for an inspection tube at an upper part and an invert part, an overflow part and an outlet part of a U-trap at the bottom part, are simultaneously formed by a set of molds. Resin trap such as PVC characterized by integral injection molding. 2. A trap made of resin such as PVC, wherein the outlet of the U trap according to claim 1 has an elliptical shape and is almost entirely visible from a connection port for an inspection tube. 3. A trap made of resin such as polyvinyl chloride having a vertical wall on the side wall of the main body at the outlet of the U trap according to claim 1.