JP4153264B2 - Synthetic resin C-ring and corrugated flexible pipe joint using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin C-ring, and more particularly, to a corrugated flexible pipe joint using this type of C-ring, and more specifically to an indoor collective collective drainage facility such as a detached house. The present invention relates to a corrugated flexible pipe joint using a synthetic resin C-ring.
[0002]
[Prior art]
For this type of collective drainage facility for indoor use such as a detached house, the present applicant has made the following proposal (Japanese Patent Laid-Open No. 2002-70099).
[0003]
That is, in FIG. 3, the collective collective drainage facility 1 is connected to one drain main pipe 101 embedded in the concrete 100 and connected to the drain pipe in the residential area, and upstream of the drain main pipe 101. In addition, since the drainage branch pipe 103 and the assembly 102 are connected in a one-touch manner, the secondary assembly 103 is made of a synthetic resin fixed with a concrete. Indoor piping can be made very easy and the workability is improved. As a result, multi-purpose workers such as concrete workers can also perform sufficient piping, especially one drain main pipe 101 and one set. Since it is the connection piping with 102 and only the concrete is hardened, labor costs associated with the construction can be reduced while preventing the construction time lag.
[0004]
In addition, the number of housing lots can be reduced, the material cost can be reduced, and the space to be piped outside the building is not required, so that the residential land can be used effectively.
[0005]
In addition, the concrete placement after the piping is difficult due to the presence of reinforcing bars, work setup, etc., but in the collective collective drainage facility 1 for indoor use, one drain main pipe 101 is provided. Since the concreting is performed after only piping 102 is assembled, the above-mentioned difficulty is solved, and the position of the drainage source equipment to be installed later by the drainage branch pipe 103 made of a flexible pipe. It has various features that it can absorb the deviation.
[0006]
And about the pipe joint which connects the drainage branch pipe 103 which consists of this flexible pipe, especially a corrugated flexible pipe, and the collective tube 102 in a one-touch type | formula after that, the following improvement proposal was performed (Japanese Patent Application 2001-2001). 141923 patent application).
[0007]
That is, in FIG. 4, this corrugated flexible pipe joint is formed with an engagement groove 105 at a substantially central portion of the receiving port length on the outer periphery of the receiving port 104 of the assembly 102, and fitted into the engaging groove 105. Using a split ring-shaped stopper 109 having a receiving-side claw 106 and a flexible tube-side claw 108 that fits into a trough 107 of a drainage branch pipe 103 that is a corrugated flexible tube. It prevents the flexible tube from coming off.
[0008]
Therefore, the drainage branch pipe 103, which is a corrugated flexible pipe, is inserted into the receiving port 104 and pushed into the receiving stopper 110 in a one-touch manner. When the mouth side claw 106 is fitted into the engagement groove 105 and the flexible tube side claw 108 is fitted into the trough 107, and the pin with the constriction is attached to the pin hole in a one-touch manner, the corrugated flexible The drainage branch pipe 103 as a pipe can be fixed in the inserted state.
[0009]
Since this receptacle 104 is a TS receptacle type with a slight taper taper, the crest of the corrugated flexible tube is slightly compressed and pushed in. In addition, since the small diameter portion of the stopper 109 is loosely fitted to the corrugated flexible tube, it has a feature that the flexibility of the corrugated flexible tube is not impaired.
[0010]
In FIG. 4, reference numeral 111 denotes a seal ring that is externally fitted to the trough 107 closest to the receiving stopper 110 of the receiving opening 104, and 112 denotes a crest of a corrugated flexible tube.
[0011]
[Problems to be solved by the invention]
However, in the improved corrugated flexible pipe joint, the following problems were subsequently found.
[0012]
That is, the distance L between the pipe end of the corrugated flexible pipe which is the drainage branch pipe 103 and the trough 107 where the flexible pipe side claw 108 of the stopper 109 is fitted varies, and as a result, the receiving port The distance L between the stopper 110 and the valley 107 varies, making it difficult to mount the split ring-shaped stopper 109.
[0013]
More specifically, even if it is attempted to fit the receiving side claw 106 of the stopper 109 into the engaging groove 105 and the flexible tube side claw 108 into the trough 107, it becomes difficult due to the variation in the distance L. As a result, the problem that the one-touch work in the confined space under the floor would be hindered.
[0014]
When analyzing such a problem, the length of the receiving port 104 of the collective 102 is made by injection molding, and the manufacturing accuracy is extremely high. On the other hand, the crest / valley of the corrugated flexible tube (112, 107 ) Has an attribute of a flexible tube, which does not reach the accuracy of injection molding. In addition, the cutting of the tube end of a corrugated flexible tube is performed at the construction site. From the fact that accuracy cannot be expected, it has been found that the variation in the distance L occurs.
[0015]
Therefore, the present invention was created by changing the way of thinking apart from preventing variation in the distance L in order to solve such a problem.
[0016]
[Means for Solving the Problems]
That is, the gist of the present invention is as follows. 1) In a C-ring made of a synthetic resin for a retaining ring, which is made of a long body having a substantially rectangular cross section and is partially cut away, the ring body Thin flanges are provided integrally on both sides in the axial direction, and the flanges are laid across the top or outer surfaces of both peaks with respect to the valleys or grooves of the ring body. 2) After inserting a corrugated flexible tube with a seal into the synthetic resin receptacle, screw it onto the male screw provided on the outer periphery of the receptacle. When fixing the corrugated flexible tube with the union nut to be joined, a C-ring previously mounted in the trough of the corrugated flexible tube is used as a fastening stopper for the union nut, and a part of the C-ring After screw tightening, dew from the unscrewed rear end of the union nut The corrugated flexible pipe joint is characterized in that the predetermined insertion state of the corrugated flexible pipe and the predetermined tightening state of the union nut are made visible. 3) The wave according to claim 2 The corrugated flexible pipe joint is used as a corrugated flexible pipe joint that is used for one-touch connection between a collection outlet in an indoor collective drainage facility such as a detached house and a corrugated flexible pipe that is a drainage branch pipe. is there.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The invention will be described in more detail by means of an embodiment shown in the accompanying drawings.
1 is a partially sectional exploded view of an embodiment of the present invention, FIG. 2 is a detailed view of an essential part of FIG. 1, and is an overall schematic view of the conventional example of FIG. 3 and an assembly detailed view of FIG. Since the same part as is omitted, it is necessary to supplement it.
[0018]
The corrugated flexible pipe joint 2 using the C-ring of the embodiment of the present invention is suitable for one-touch connection in an indoor collective drainage facility such as a detached house, but a general corrugated flexible pipe joint, For example, the present invention can also be applied to a corrugated flexible pipe joint for electric wire protection.
[0019]
Therefore, the corrugated flexible tube is made of synthetic resin, and is preferably an independent mountain-valley shape, that is, an annular corrugated flexible tube having a diameter of about 50 mmφ to about 500 mmφ.
[0020]
And since this corrugated flexible pipe joint 2 is suitable for a drain pipe, it is made into the combined type which can also insert a VU pipe | tube in the receptacle.
[0021]
Now, the corrugated flexible pipe joint 2 of this embodiment will be outlined.
[0022]
1 and 2, the corrugated flexible pipe joint 2 is constructed by inserting a sealed corrugated flexible pipe 4 into a synthetic resin receiving port 3, and then connecting a union nut 5 to the outer periphery of the receiving port 3. When the corrugated flexible tube 4 is fixed by screwing into the male screw 6 provided on the corrugated flexible tube 4, the union nut 5 is tightened by using a C-ring 8 fitted in advance in the valley 7 of the corrugated flexible tube 4. These standards are used so that the length for inserting the corrugated flexible tube 4 into the receiving port 3 is not excessive and insufficient and the tightening amount of the union nut 5 is not excessive or insufficient. The state can be visually checked.
[0023]
As a result, the retaining and fixing work for the one-touch connection work between the receiving port 3 and the corrugated flexible tube 4 is generalized, and even if the corrugated flexible tube 4 has a poor accuracy such as manufacturing, the union nut 5 Fixing work can be reliably performed by adjusting the tightening force and fine adjustment of the screw advance / retreat amount.
[0024]
Next, the corrugated flexible pipe joint 2 of this embodiment will be described in detail.
[0025]
First, the receiving port 3 is formed in a standard size that allows a general VU pipe to be joined to a TS. Therefore, the receiving stopper 9 is provided so as to have a predetermined receiving length. Provided.
[0026]
Further, the male screw 6 is formed on the outer peripheral surface so as to be cut off, that is, without providing a nut stopper.
[0027]
The receiving port 3 may be integrally injection-molded into a set (102 in FIG. 4), but is separate from the set (102) and is a single-sided socket shape, a double-sided socket shape, or a single-sided TS joint. The present invention can be applied to or applied to a single-ended socket shape with a receiving port, and further, a receiving port of a flanged short tube integrated molding.
[0028]
Next, the corrugated flexible tube 4 is an annular finned flexible tube, the inner surface of which is smooth and corrugated on the outer layer, and is close to the appropriately cut tube end 10. A seal ring 11 is externally fitted to the valley 7 to provide a pipe joint seal.
[0029]
Of course, the seal ring 11 has a flexible pipe made of synthetic resin and is configured to have a predetermined diameter applicable to a drain pipe or the like, so that the dimensional accuracy of the peaks and valleys is not necessarily high. From the above, the seal ring with a lip is used to absorb the backlash from the injection-molded receiving port 3 and seal it.
[0030]
Next, the union nut 5 is made of synthetic resin, and is screwed into the male screw 6 on the outer periphery of the receiving port 3 to connect the receiving port 3 and the corrugated flexible tube 4 (union). Therefore, it is configured as a union nut that is screwed back and forth in order to prevent the fixing.
[0031]
The union nut 5 is provided with a constricted portion 12 in the form of a cap nut at the rear end of the screw. Therefore, the union nut 5 can be referred to as a cap nut type flexible tube presser nut.
[0032]
The narrowed portion 12 comes into contact with a C-ring 8 fitted in advance in the valley 7 slightly outside the length of the receiving port after insertion of the flexible tube, and is a tightening stopper (contacted by screwing to be screwed). In particular, the wall thickness (axial thickness) is made slightly smaller than the width (projection length) of the thin flange 13 of the C-ring 8, and after the union nut 5 is tightened, the flange The outer peripheral portion of 13, that is, a part thereof is exposed from the throttle portion 12 so that it can be visually recognized. Of course, it does not have to be a flange shape and may be a star shape.
[0033]
Therefore, the opening diameter of the throttle portion 12 is made smaller than the outer diameter of the attached C-ring 8. And if the flange 13 is colored, visual recognition becomes easy.
[0034]
The union nut 5 has a female screw 14 which is screwed into the male screw 6 on the inner periphery thereof, and a knurling knurl 15 is processed on the outer periphery thereof. Of course, instead of the knurl 15, six spanner hooks may be provided.
[0035]
A large number of protrusions 16 are provided on the rear end surface of the union nut 5 so as to give rigidity to the synthetic resin nut.
[0036]
The C-ring 8 is similar to the C-type concentric snap ring made of metal such as spring steel in the JIS standard, and is generally called a snap ring or a circlip. The function is to prevent the shaft from coming off, so the cross-sectional shape is a substantially rectangular partially-notched spring ring that is elastically deformed into the groove on the outer surface of the shaft or the groove on the inner surface of the hole. Is.
[0037]
However, in addition to this feature, the C-ring 8 according to the present invention is made of high-density polyethylene (manufactured by synthetic resin injection molding), and a long plate body having a substantially rectangular cross section is a ring body with its long side in the radial direction. The ring body 8A is formed by integral injection molding with thin flanges 13 and 13 on both side surfaces in the axial direction, which is difficult to form with a metal C-ring. In particular, the ring body 8A includes the corrugated flexible tube 4. These flanges 13 can be straddled over the top surfaces of two peaks.
[0038]
The notch length of the ring main body 8A differs from the metal C ring due to the lack of elasticity of the synthetic resin in the range of about 90 ° when viewed from the entire 360 ° ring, that is, about 1/4 of the ring main body 8A. The range is large. Therefore, it may be referred to as an E-shaped retaining ring.
[0039]
Therefore, when this C-ring 8 is elastically attached to the trough 7 of the corrugated flexible tube 4, the ring body 8 is on the trough side and the two crest surfaces adjacent to the flange 13 (the crests of both mountains relative to the trough). Each surface), even if there is a large notch, it will not come off by tightening the union nut 5.
[0040]
And since the outer peripheral part of one flange 13 is exposed from the union nut 5, the mounting | wearing attitude | position of C ring 8 can also be confirmed. Of course, unlike metal C-rings, there is no corrosion due to use.
[0041]
The C ring 8 is not limited to the union nut 5 and may be used as a split nut, or may be mounted in a general ring groove and the flange 13 may be straddled over the outer surface.
[0042]
【The invention's effect】
According to the first aspect of the present invention, the elastic mounting of the C-ring can be strengthened while covering the lack of elasticity of the synthetic resin C-ring compared to the metal C-ring by providing the rigidity with the thin flanges on both sides. .
[0043]
According to the second aspect of the present invention, it is possible to standardize the work by preventing the poor tightening and the poor insertion while using the C-ring as the union nut tightening stopper.
[0044]
According to the invention of claim 3, it is possible to contribute to the one-touch connection in addition to the above.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional exploded view of an embodiment of the present invention.
2 is a detailed view of an essential part of the assembly of the embodiment of FIG. 1;
FIG. 3 is a conventional example.
FIG. 4 is an assembly detail drawing of the pending application.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Collective collective drainage equipment, 2 ... Corrugated flexible pipe joint, 3 ... Receptacle, 4 ... Corrugated flexible pipe, 5 ... Union nut, 7 ... Valley, 8 ... C ring, 8A ... Ring main body, 13 ... Thin flange, 102 ... will gather

Claims (3)

In a C-ring made of synthetic resin for a retaining ring, which uses a long body having a substantially rectangular cross section, and is composed of a ring body partially cut away,
Thin ring flanges are provided integrally on both sides of the ring body in the axial direction, and the flanges straddle the top surface or the outer surface of both peaks with respect to the valley or groove of the ring body, so that the C ring is firmly attached. A synthetic resin C-ring for a retaining ring. After inserting the waved flexible tube with a seal into the synthetic resin receiving port, and fixing the waved flexible tube with a union nut screwed into the male screw provided on the outer periphery of the port,
The C-ring previously mounted in the trough of the corrugated flexible tube is used as a tightening stopper for the union nut, and a part of the C-ring is exposed from the screwed rear end of the union nut after the screw tightening. The corrugated flexible pipe joint is characterized in that the predetermined insertion of the corrugated flexible pipe and the predetermined tightening state of the union nut are made visible. The corrugated flexible pipe joint according to claim 2 is used for a one-touch connection between a collection outlet of an indoor collective drainage facility such as a detached house and a corrugated flexible pipe as a drainage branch pipe. Flexible pipe joint.

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