JP4384441B2 - Packing and draining using this packing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packing for sealingly attaching a lid to an opening and a drainage drain using this packing.
[0002]
[Prior art]
Conventionally, drainage tanks of various structures are known, but usually, an inlet and an outlet are provided on the side surface, an inspection cylinder is provided on the upper surface, and a lid is provided at the upper end of the inspection cylinder. It is installed.
Drainage basins are installed at the merging section, bend section, step section, pipe inspection section, etc. of the sewage pipe line, and drainage pipes from the home and sewage pipes from the upstream are connected to one or more inlet And a sewer pipe is connected to the outlet.
In these drains, an inspection cylinder is set up for inspection and cleaning of the sewage pipe. This inspection tube may be formed integrally with the drainage drainage main body having an inlet and an outlet, but the inspection cylinder connection port is provided on the upper surface of the drainage drainage main body, and the inspection cylinder is connected to this inspection cylinder connection port. If so, the length of the inspection tube can be changed according to the installation site of the drainage.
[0003]
Because these drainage inspection cylinders lack mechanical strength, they are usually protected on the exposed parts of the road with protective cast iron lids (in the industry, cast iron protection). It is known to provide a hat (referred to as Patent Document 1, for example).
After these drains are installed, dust and dirt may adhere to the inlet and outlet, and sometimes clog up. Sometimes, open the protective lid and the lid of the inspection tube, and check the inside. If it is clogged, clean it by inserting a cleaning tool through the opening of this cylinder.
Since the protective cover and the cover of the inspection cylinder described in Patent Document 1 are simply fitted and attached, gaps may occur due to dimensional errors or deformation, and the sealing performance may not be sufficient. Many.
[0004]
If the protection lid of the drainage drainage lid or the lid of the inspection tube is not sufficiently sealed, rainwater will infiltrate and increase the amount of sewage treatment, or the odor will be released due to fluctuations in the air pressure in the sewage pipes, causing deterioration of the environment There was a problem such as coming.
In order to maintain the sealing property between the inspection cylinder and the lid, “the upper opening portion of the inspection cylinder 6 is a so-called VU pipe inner diameter joining method, and a receiving frame (lid frame) which is a PVC injection molded product as shown in FIG. 7 is fitted through an adhesive, and a vinyl disc-shaped lid 9 is closely fitted to the receiving frame 7 through a packing 8 so as to be openable and closable. Referring to it, it is known that an annular packing having a V-shaped cross section is fitted into an annular groove provided on the outer periphery of the lid and closely fitted (see, for example, Patent Document 2).
[0005]
[Patent Document 1]
JP-A-7-189332 (paragraph number 0003, FIG. 1-2)
[Patent Document 2]
JP-A-8-326139 (paragraph number 0006, FIG. 1-2)
[0006]
[Problems to be solved by the invention]
However, if the lid attached to the upper end of the drainage cylinder is fitted with a V-shaped packing, the dimensional error will be absorbed and the sealing performance will be improved. Although there is no divergence, there is a problem that since the rubber packing is fitted in a compressed state, it is difficult to slip and the lid cannot be smoothly attached to and removed from the upper end of the inspection tube.
[0007]
To solve this problem, use a method of applying a lubricant to the V-packing when mounting the V-packing on the lid, or use a V-packing molded with an oil-containing rubber in which oil is blended with the rubber used as the V-packing material. A method of oozing oil is gradually performed.
However, in the method of applying the lubricant, the lubricant is lost after several times of attaching and removing the lid, and the attachment and removal of the lid cannot be performed smoothly. In addition, the oil-containing V-packing has a problem that cracks are generated in an ozone deterioration test in JIS standards. Further, due to aging deterioration, when oil is exhausted, the lid cannot be attached or removed smoothly.
[0008]
[Means for Solving the Problems]
It is an object of the present invention to provide a packing suitable for improving the sealing performance between the inspection cylinder and the lid body in the drainage basin described in Patent Documents 1 and 2 as described above, and a drainage basin using this packing. .
[0009]
The packing according to claim 1 is a packing made of an annular elastic body used for inserting and sealing a lid into a tube opening, and at both ends of the inner peripheral surface of the annular elastic body having a substantially rectangular cross section , Rutotomoni ridges fitted to the corners of the recessed section of the annular groove provided in the insertion portion outer periphery of the tube opening of the lid is provided in the circumferential direction, between the ridges in bilaterally, the An annular recess of about 10-50% of the radial thickness of the annular elastic body extends in the radial direction, and the outer surface of the annular elastic body corresponding to the deepest part of the depression has a smooth curved surface. On the other hand, an annular projecting piece having a rounded shape at a tip end portion is provided in a horizontal direction from a thick base portion through a tapered portion.
As described above, the circumferential protrusions formed at both ends of the inner peripheral surface of the annular elastic body having a substantially rectangular cross section, and the left and right synonyms formed between the protrusions, the radial thickness of the annular elastic body is 10. This packing is fitted into the annular groove of the lid body at the corner of the annular groove having a concave cross section provided on the outer periphery of the insertion portion into the tube opening by an annular recess extending in the radial direction of about 50%. In addition, since the elastic deformation of the packing allows the ring groove to contact and be installed without any gap, leakage, inflow and odor release from the packing mounting groove of the lid body are eliminated.
Further, the annular elastic body outer peripheral surface corresponding to the deepest portion of the recess of the annular elastic Body, while drawing the outer surface smooth curved surface, an annular protrusion having a Marmi the tip through the tapered from a thick base horizontal have been projected in a direction, upon insertion of the lid into the tube opening, bent tip having a Marmi of the annular protrusion is in contact with the tube opening inner surface of the lid and the tube opening because sealing the gap, even if dimensional errors in the fitting of the lid and the tube opening can be mounted a sealing good lid to the tube opening.
[0011]
Further, the drainage basin according to claim 2 is provided with an inlet and an outlet on the side surface and an inspection cylinder is provided on the upper surface. The lid attached to the upper end of the inspection cylinder is connected to the inspection cylinder. An annular groove having a concave cross section is provided on the outer periphery of the insertion portion, and the packing according to claim 1 is attached to the annular groove, the annular projecting piece is bent obliquely upward, and its tip is in contact with the inner surface of the inspection tube. It is characterized by being.
The drainage basin is mounted with the packing according to claim 1 in an annular groove provided on the outer periphery of the lid, the annular projecting piece is bent obliquely upward, and its tip is in contact with the inner surface of the inspection cylinder . Therefore, even if there is a gap between the outer surface of the lid and the inner surface of the inspection tube, the rounded tip of the ring-shaped protruding piece of the packing bends and contacts the inner surface of the inspection port, and the gap between the lid and the inspection tube Therefore, even if there is a dimensional error in the fitting between the lid and the inspection cylinder, the lid can be attached to the inspection cylinder with good sealing performance, and rainwater intrusion and odor leakage can be prevented. In addition, it is easy to install and remove.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The packing of the present invention and the drainage basin using this packing will be described with reference to the drawings.
FIG. 1 is a front view showing an embodiment of the packing of the present invention, FIG. 2 (a) is a cross-sectional view of the packing shown in FIG. 1, (b) is a cross-sectional view showing another modification, and FIG. It is a front view which shows the other Example of packing. In the figure, reference numeral 1 denotes a packing. The packing 1 has an annular elastic body 11 that fits in an annular groove having a concave cross section formed on the outer periphery of the lid, and a circumferential portion near both ends of the inner peripheral surface of the annular elastic body 11. Ridges 12, 12 provided in the direction, an annular recess 13 between the ridges 12, 12, an annular protrusion 14 having a rounded portion 15 at the tip formed on the outer periphery of the annular elastic body 11, It is made up of.
The packing 1 is manufactured by molding an elastic material such as synthetic rubber such as styrene-butadiene rubber. The rubber hardness is preferably about 50 to 55 degrees in durometer hardness.
[0014]
The annular elastic body 11 is dimensioned to fit into a concave annular groove formed on the outer periphery of the lid, and the protrusions 12 and 12 prevent water leakage from between the packing 1 and the concave annular groove. To be provided.
The annular projecting piece 14 is inverted and deformed as shown in FIGS. 5 and 6 when a lid is attached to and removed from the opening. This is because the sealing performance is secured even when the dimensional error between the inner diameter of the opening and the outer diameter of the insertion portion into the opening of the lid is maximized, and the resistance of attaching and removing the lid is reduced. The dimensions and shape are determined in consideration of the tolerance between the opening and the lid, the sealing property between the packing 1 and the concave annular groove, and the ease of reversal deformation of the annular projecting piece 14.
Moreover, the outer peripheral front end portion of the annular projecting piece 14 is formed in a shape having a round cross section, so that water blocking is ensured regardless of which direction the annular projecting piece 14 is deformed.
In addition, when the lid is attached or detached, the annular protrusion 14 is deformed in an inverted manner. However, if the annular recess 13 is formed between the protrusions 12 and 12, the resistance to the inversion deformation is reduced. If this recess 13 is made too large, the sealing performance between the packing 1 and the concave annular groove is impaired, so it is preferable to make the recess 13 approximately 10 to 50% of the thickness of the annular elastic body 11.
[0015]
Further, in order to further reduce the resistance to reversal deformation of the annular projecting piece 14, a circumferential cut 13c may be provided at an intermediate position of the recess 13b of the packing 1b as shown in FIG.
[0016]
The packing 1 shown in FIGS. 1 and 2 is used by being attached to a concave annular groove provided on the outer periphery of the insertion portion to the opening of the lid, but the packing of the present invention is as shown in FIG. It may be used by being mounted in a concave annular groove provided on the inner peripheral surface of the opening.
The packing 1a includes an annular elastic body 11a that fits into a concave annular groove provided on the inner peripheral surface of the opening, and protrusions 12a and 12a provided in the circumferential direction near both ends of the outer peripheral surface of the annular elastic body 11a. And an annular recess 13a between the ridges 12a, 12a, and an annular protrusion 14a having a rounded portion 15a at the tip end formed in the middle of the inner periphery of the annular elastic body 11a.
[0017]
Next, an embodiment of the drainage basin using the packing 1 shown in FIG. 1 will be described based on FIGS. 4 is a side view showing a part of the embodiment of the drainage basin according to the present invention, FIG. 5 is an enlarged partial sectional view showing a part of FIG. 4 in an enlarged manner, and FIG. 6 is a view when removing the lid of FIG. It is explanatory drawing which shows a state.
In the figure, reference numeral 2 denotes a drainage drain, which is composed of a drainage drain main body 3, an inspection cylinder 4, and a lid 5 attached to the upper end portion of the inspection cylinder 4.
The drainage main body 3 is provided with an inlet 31 and an outlet 32 on the side surface and an inspection tube connection port 33 on the upper surface side.
The inspection cylinder 4 is connected to an inspection cylinder connection port 33 provided on the upper surface side of the drainage drain main body 3. A lid 5 is attached to the upper end of the inspection cylinder 4.
The inspection cylinder 4 is made of a synthetic resin pipe such as a hard polyvinyl chloride resin pipe, and is used by cutting it to an appropriate length corresponding to the embedding depth of the drainage body 3 at the installation site of the drainage tank 2. .
[0018]
A handle 51 is provided on the lid 5 for convenient attachment and removal, and a concave annular groove 53 is formed on the outer periphery of the lower surface insertion portion 52 fitted to the upper end portion of the inspection tube 4. The packing 1 is mounted in the annular groove 53.
In order to attach the lid 5 to the inspection tube 4, it is only necessary to hold the handle 51 and press the insertion portion 52 against the upper end of the inspection tube 4. In the packing 1, the annular projecting piece 14 projecting outward from the insertion portion 52 of the lid 5 hits the inner surface of the inspection tube 4 and deforms backward as shown in FIG. The rounded portion 15 is fitted by sliding on the inner surface of the inspection tube 4.
[0019]
A drain pipe 34 piped from home is connected to the inlet 31 of the drainage main body 3, and a sewage pipe 35 is connected to the outlet 32.
Reference numeral 6 denotes a cast iron protective hat, which is installed in order to prevent the weight of a vehicle or the like from being directly applied to the drain 2. This protective hat 6 is installed on the pedestal ring 7 so that a cast iron frame 61 covers the upper part of the inspection cylinder 4, and a cast iron lid 62 is detachably attached to the upper surface of the frame 61. ing. The upper surface of the protective hat 6 is visible on the ground such as roads. When the lid 62 is removed from the ground and the cover 5 of the inspection cylinder 4 in the protective hat 6 is removed, the inside of the drainage tank 2 is inspected. Can be cleaned.
[0020]
When inspecting and cleaning the inside of the drainage basin 2, the lid 62 attached to the top 62 of the protective hat 6 and the inspection cylinder 4 is removed, but when the lid 5 is removed, the lid 5 As shown in FIG. 6, the packing 1 attached to the concave annular groove 53 provided in the insertion portion 52 has an annular projecting piece 14 formed on the outer periphery thereof on the opposite side from the deformation direction at the time of insertion. Then, the rounded portion 15 at the tip of the annular projecting piece 14 slides on the inner surface of the inspection tube 4 and is removed.
In this way, when attaching and removing the lid 5, the packing 1 is attached and removed because the annular projecting piece 14 is inverted and deformed, so that the resistance of attachment and removal of the lid 5 is reduced and easy. Can be attached to and detached from.
[0021]
In the present invention, the packing 1a shown in FIG. 3 is attached to the concave annular groove provided in the upper end of the inspection cylinder 4, and the lid 5 having the insertion portion 52 not provided with the concave annular groove is provided in the inspection cylinder. 4 may be attached.
[0022]
【The invention's effect】
The packing according to claim 1 is a packing made of an annular elastic body used for inserting and sealing a lid into a tube opening, and at both ends of the inner peripheral surface of the annular elastic body having a substantially rectangular cross section , Rutotomoni ridges fitted to the corners of the recessed section of the annular groove provided in the insertion portion outer periphery of the tube opening of the lid is provided in the circumferential direction, between the ridges in bilaterally, the An annular recess of about 10-50% of the radial thickness of the annular elastic body extends in the radial direction, and the outer surface of the annular elastic body corresponding to the deepest part of the depression has a smooth curved surface. On the other hand, since the annular projecting piece having a rounded shape at the tip part from the thick base part is projected in the horizontal direction, the left and right synonyms formed between the projecting ridge and the projecting ridge , packing according indentations in the radial direction extending in the radial direction of about 10 to 50% of the thickness of the annular By elastic deformation, since the annular groove of the packing and the lid can be mounted in contact without gap, it can be eliminated leakage and influx and release of odors from between the packing mounting groove and a packing.
Also, when attaching or removing the lid, the annular protrusion is bent and inverted and deformed, and the rounded end of the annular protrusion slides, so there is a dimensional error in the fitting between the lid and the tube opening. However, the lid can be attached to the tube opening with good sealing performance. Further, when the lid is attached or removed, the annular projecting piece is inverted and deformed, so that the sliding resistance force of the packing is reduced and can be easily attached and detached.
[0023]
Further, the drainage basin according to claim 2 is provided with an inlet and an outlet on the side surface and an inspection cylinder is provided on the upper surface. The lid attached to the upper end of the inspection cylinder is connected to the inspection cylinder. An annular groove having a concave cross section is provided on the outer periphery of the insertion portion, and the packing according to claim 1 is attached to the annular groove, the annular projecting piece is bent obliquely upward, and its tip is in contact with the inner surface of the inspection tube. Therefore, even if there is a gap between the outer surface of the lid and the inner surface of the inspection tube, the rounded tip of the annular projecting piece of the packing bends and contacts the inner surface of the inspection port. Since the gap is sealed, even if there is a dimensional error in the fitting between the lid and the inspection cylinder, the lid can be attached to the inspection cylinder with good sealing performance, and rainwater intrusion and odor leakage can be prevented. In addition, it is easy to install and remove.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a packing according to the present invention in partial cross section.
2A and 2B are cross-sectional views of the packing of the present invention, wherein FIG. 2A is a cross-sectional view of the packing shown in FIG. 1, and FIG. 2B is a cross-sectional view showing another modification.
FIG. 3 is a front view showing a reference example of the packing of the present invention in a partial cross section.
FIG. 4 is a side view partially showing a cross section of an embodiment of the drainage basin of the present invention.
FIG. 5 is an enlarged partial cross-sectional view showing a part of FIG. 4 in an enlarged manner.
6 is an explanatory view showing a state when the cover body of FIG. 5 is removed. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 1a Packing 11, 11a Annular elastic body 12, 12a Protrusion 13, 13a Annular depression 14, 14a Annular protrusion 15, 15a Round part 2 Drain 3 Drain main body 31 Inlet 32 Outlet 4 Inspection cylinder 5 Lid 52 Insertion 53 Recessed annular groove

Claims (2)

A packing made of an annular elastic body used to insert and seal the lid into the tube opening,
The inner peripheral surface at both ends of a substantially rectangular annular elastic body, disposed ridges fitted to the corners of the recessed section of the annular groove provided in the insertion portion outer periphery of the tube opening of the lid body in the circumferential direction is Rutotomoni,
Wherein the inter-ridge with bilaterally, the recess of the annular resilient body 10% to 50% approximately of the annular radial thickness extends radially
On the outer peripheral surface of the annular elastic main body corresponding to the deepest part of the depression, an annular projecting piece having a rounded shape from the thick base part to the tip part is projected in the horizontal direction while the outer surface draws a smooth curved surface. Packing characterized by being. In the drainage drain with an inlet and outlet on the side and an inspection cylinder on the upper surface, an annular groove having a concave cross section is formed on the outer periphery of the insertion portion of the lid attached to the upper end of the inspection cylinder. Drainage is characterized in that the packing according to claim 1 is installed in the annular groove, the annular projecting piece is bent obliquely upward, and its tip is in contact with the inner surface of the inspection tube .

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