JPH10132174A - Two-pieces divided type pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily connect a pair of half cylindrical members to each other by using a pair of pliers after temporarily connecting them in a state that they are separated at a small distance before complete connection, when a pair of half cylindrical members are connected to each other. SOLUTION: A pair of half cylindrical members 1A, 1B for covering the half peripheries of a joint part of a pipe are provided with outward projecting flange parts 3A, 3B on both side edges. Locking pieces 4 to be locked on the flange parts 3B are formed on the flange parts 3A. Temporary fixing piece 6 to be hooked on the flange parts before a pair of half-cylindrical members are completely connected to each other are formed on the flange parts 3A. The temporary fixing pieces 6 are hooked on and temporarily connected to the flange parts 3B, and the projecting pieces 8 and the locking pieces 4 are pinched by a pair of pliers to completely connect them to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split type pipe joint, and more particularly to a pipe joint suitable for connecting a plastic corrugated pipe used as an electric conduit or an underdrain drain pipe.

[0002]

2. Description of the Related Art Conventionally, a split type pipe joint has been known as a connecting member of a plastic corrugated pipe (Japanese Patent Application Laid-Open No. Hei 7 (1994) -76).
224895, JP-A-63-28993, etc.). The split-type pipe joint includes a pair of half-cylinder members that cover a butt portion of a corrugated pipe to be connected by half a circumference.
Each of the pair of half-cylinder members has a flange portion projecting outward on both side edges. When one pair of half-cylinder members are combined in a tubular shape, a locking piece that is hooked to the other flange portion is formed on one of the flange portions that overlap with each other. Further, a waveform meshing with the waveform of the outer peripheral surface of the corrugated tube is formed on the inner surface of the half-cylinder member.

[0003]

In the case of connecting a corrugated pipe with such a split pipe joint, a corrugated pipe is sandwiched between a pair of half cylinder members, and then a pair of half cylinder members is connected. Are required to be pressed toward each other so that the locking pieces formed on one flange portion are hooked on the other flange portion. However, since a corrugated tube is generally transported in a coiled state, the winding habit often remains even after the tube is rewound and laid. In the case where a corrugated pipe with a curl remaining at the end is connected by a split pipe joint, when connecting a pair of half-cylinder members, the curl of the corrugated pipe is corrected by the force. Therefore, an extremely large pressing force is required to join the pair of half-cylinder members, and the joining operation is very difficult. Further, even if a tool such as a plier is used for connecting the half-cylinder members, it is difficult to firmly hold the pliers or the like first, so that the connecting operation was not easy in this case as well.

Accordingly, a first object of the present invention is to provide a two-piece type pipe joint which can be easily joined by using a clamping tool such as a plier when joining a pair of half-cylinder members. . A second object of the present invention is to
An object of the present invention is to provide a two-piece type pipe joint in which a pair of half-cylinder members can be temporarily connected with a slight interval before completely connecting them, thereby facilitating a connection operation.

[0005]

In order to achieve the first object, the present invention comprises a pair of half-cylinder members which cover a butt portion of a pipe to be connected by a half circumference, and each of the pair of half-cylinder members is A pair of half-cylinder members are provided with flange portions protruding outwardly on both side edges. In a two-piece type pipe joint formed with a locking piece for holding a cylindrical member in a completely connected state, a portion where the locking piece of the other flange portion is hooked on an outer surface of the half cylindrical member having the other flange portion. In parallel, a projection is formed.

When such a projection is formed, when the locking piece of one flange is hooked on the other flange, the projection and the locking piece are pinched by a pinching tool such as a plier. Since the pressing force can be applied, the work of hooking the locking piece to the other flange portion becomes easy.

In order to further achieve the second object, the present invention provides a split pipe joint having the above-mentioned protruding piece, wherein a pair of flanges overlap each other when a pair of half-cylinder members are combined in a cylindrical shape. A temporary fixing piece is formed on one of the flange portions so as to be hooked on the other flange portion before the pair of half-cylinder members are completely connected.

When such a temporary fixing piece is formed, 1
Before completely joining the pair of half-cylinder members, the pair of half-cylinder members are temporarily joined by pressing with a small force, and then the pressing force is applied by the clamping tool as described above to complete the joining. Can be. Therefore, the joining operation of the pair of half cylinder members can be performed more easily.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] FIGS. 1 to 8 show a first embodiment of the present invention. In the figure, reference numerals 1A and 1B denote a pair of half-cylinder members constituting a split pipe joint, and 2A and 2B denote plastic corrugated pipes to be connected. 1 to 3 show a pair of half cylinder members 1.
4A and 5B show a state before the pair of half-cylinder members 1A and 1B are temporarily connected, and FIGS. 6 and 7 show a state where the pair of half-cylinder members 1A and 1B are completely connected. FIG. 8 shows a state in which the connection has been made, and a state in the course of shifting from the temporary connection to the complete connection.

As shown in FIGS. 1 to 3, each of the pair of half-cylinder members 1A and 1B has flange portions 3A and 3B protruding outward on both side edges. The half cylinder members 1A and 1B are shown in FIG.
As is clear from FIG. 3 and FIG. 3, the structure is the same except that the left and right are reversed. Therefore, here, the right half of FIGS. 1 and 3 will be described first. One half cylindrical member 1A
A locking piece 4 rising from each outer edge is integrally formed on the flange portion 3A. The locking piece 4 has an inward claw 5 at the distal end in parallel with the flange 3A. The nail 5
When the pair of half-cylinder members 1A and 1B are completely assembled in a tubular shape, the half-cylinder members 1A and 1B are formed at positions where they are hooked on the edge of the counterpart flange portion 3B.

Further, a temporary fixing piece 6 is further provided at the tip of the locking piece 4.
Is formed, and the temporary fixing piece 6 is also provided with a flange 3A at the front end.
And a claw 7 facing inward. The length of the locking piece 4 is relatively longer than １ ／ and less than の of the length of the half cylindrical member 1A, but the length of the temporary fixing piece 6 is half of the length of the locking piece 4. Is relatively short of. As will be described later, the locking piece 4 is for completely connecting the half-cylinder members 1A and 1B with the claw 5, and the temporary fixing piece 6 is for temporarily connecting the half-cylinder members 1A and 1B with the claw 7. is there. The temporary fixing piece 6 is formed near the outer end of the locking piece 4 so as not to be in the way when completely connected.

Next, on the outer surface of the other half cylindrical member 1B, a protruding piece 8 is formed on the flange 3B in parallel with the flange 3B. 2 and 3, the protruding piece 8 is formed so as to protrude outward from the outer edge of the flange portion 3B. The projecting dimension a of the projecting piece 8 from the half-cylinder member 1B is substantially the same as the projecting dimension b from the base of the flange 3A to the outer surface of the locking piece 4. It is preferable that the distance d between the projecting piece 8 and the flange portion 3B is made as small as possible within a range where the projecting piece 8 does not hit the tip of the locking piece 4 when the half cylinder members 1A and 1B are completely connected. The position of the protruding piece 8 in the longitudinal direction of the half-cylinder member 1B does not overlap with the temporary fixing piece 6 on the half-cylinder member 1A side.

The above is the configuration of the right half of the half-cylinder members 1A and 1B in the length direction in FIGS. 1 and 3, and the configuration of the left half in the length direction is the locking piece 4, the temporary fixing piece 6, and the protruding piece. The only difference is that the positional relationship between the first and second half cylindrical members 1A and 1B is opposite to the above. Note that, on the inner surfaces of the half-cylinder members 1A and 1B, there are formed ridges 10 that fall into the corrugated valleys 9 on the outer peripheral surfaces of the corrugated tubes 2A and 2B.

Next, a description will be given of a method of connecting a corrugated pipe using the split-type pipe joint configured as described above. First, as shown in FIG. 3, the half-cylinder members 1A and 1B are arranged so as to straddle the butted portions of the corrugated tubes 2A and 2B to be connected, and the half-cylinder members 1A and 1B are used to connect the corrugated tubes 2A and 2B. Pinch it. Then, as shown in FIGS. 4 and 5, the pawl 7 of the temporary fixing piece 6 is engaged with the flange 3B. Corrugated tube 2
If there is no winding habit in A and 2B, almost no force is required to achieve this state. However, since the corrugated tubes 2A and 2B usually have a curl, a little force is required before the temporary fixing state shown in FIGS. 4 and 5 because the curl is slightly corrected. . However, according to the pipe joint of the present invention, the work at this stage can be performed with bare hands without using a tool. Although the half-cylinder members 1A and 1B are repelled from the inside by slightly correcting the curl, the claw 7 of the temporary fixing piece 6 is caught on the flange portion 3B.
B is kept connected. This is the state of the temporary connection. In this state, the operator releases his / her hand and can prepare a pinching tool such as a plier.

Thereafter, the operator clamps the locking piece 4 and the projecting piece 8 from above and below with a pliers and tightens them as shown by arrows. Then, the claw 5 of the locking piece 4 gets over the flange portion 3B and is hooked on the flange portion 3B, and is in a completely connected state as shown in FIGS. When changing from the temporary connection state to the complete connection state, a large force is required to correct the curl of the corrugated tube. However, when one side is completely connected as shown in FIG. When the opposite side is completely joined, one side is already completely joined and cannot be detached. When the protruding piece 8 and the engaging piece 4 are tightened from above and below with a prior, the engaging piece 4 Since a tightening force is applied from directly above, when the claw 5 of the locking piece 4 is engaged with the flange portion 3B, a strong force can be applied with a plier. Therefore, this pipe joint can easily connect the corrugated pipe while correcting the curl of the corrugated pipe.

In the temporary connection state, the flange 3
The gap G between A and 3B (see FIGS. 4 and 5) is less than twice the wave height H (see FIG. 3) on the outer peripheral surface of the corrugated tube (G).
It is preferable to form the temporary fixing pieces 6 so as to satisfy <2H). In this way, even in the temporarily joined state, the corrugated pipe does not pull out of the pipe joint, and the pipe joint does not come off vertically, so that the temporarily joined state can be maintained in a state combined with the corrugated pipe, and work is easy to perform. Become.

[Embodiment 2] FIGS. 9 to 12 show a second embodiment of the present invention. FIGS. 9 and 10 show a state before the pair of half-cylinder members 1A and 1B are joined, FIGS.
Is a state in which the pair of half-cylinder members 1A and 1B are temporarily connected.
The difference between the split pipe joint and the first embodiment is that the pipe joint shown in FIG.
As shown in FIG. 10, the temporary fixing piece 6 is shifted in the longitudinal direction so as not to overlap with the locking piece 4, and
A is that it protrudes above A, and that a hole 11 is formed in the flange portion 3B of the counterpart corresponding to the temporary fixing piece 6. The temporary fixing piece 6 is substantially U-shaped, and has a form in which claw 7 facing the opposite side is formed at the tip. The configuration other than the above is the same as that of the first embodiment, and the same portions are denoted by the same reference numerals.

When the corrugated pipe is sandwiched between the half-cylinder members 1A and 1B in the state of FIGS. 9 and 10 and the half-cylinder members 1A and 1B are moved closer to each other, the pipe joint shown in FIGS. As shown in FIG. 12, the distal end of the locking piece 6 passes through the hole 11 of the mating flange 3B, and the pawl 7 is hooked on the flange 3B to be in a temporary connection state. After this, the first embodiment
Can be completely combined in the same manner as described above. Note that the positions of the temporary fixing pieces 6 and the holes 11 may be reversed.

[0019]

As described above, according to the present invention, when the locking piece of one flange is engaged with the other flange, the protrusion provided on the side of the locking piece and the other flange. Can be securely pinched by the pinching tool to apply force, and the pinching force can be applied from just above the temporary fixing piece, so that the force of the pinching tool can be transmitted without loss It is possible to easily connect the locking piece and the other flange with a relatively small force. Therefore, the pair of half-cylinder members can be easily and completely connected.

By providing the temporary fixing projections, the pair of half-cylinder members can be held in the state of the temporary connection before they are completely connected, so that the subsequent operation of complete connection is very easy. There is an advantage.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a split pipe joint according to the present invention.

FIG. 2 is a front view of the pipe joint of FIG. 1;

FIG. 3 is a developed view showing the pipe joint of FIG. 1 together with a butted portion of a corrugated pipe.

FIG. 4 is a side view showing a state where the pipe joint of FIG. 1 is temporarily connected.

FIG. 5 is a front view of the state shown in FIG. 4;

FIG. 6 is a side view showing a state where the pipe joint of FIG. 1 is completely connected.

FIG. 7 is a front view of the state shown in FIG. 6;

FIG. 8 is a front view showing a state in which the pipe joint of FIG. 1 is being changed from a temporary connection state to a complete connection state.

FIG. 9 is a side view showing a second embodiment of the split pipe joint according to the present invention.

FIG. 10 is a front view of the pipe joint of FIG. 9;

FIG. 11 is a side view showing a state where the pipe joint of FIG. 9 is temporarily connected.

FIG. 12 is a front view of the state shown in FIG. 11;

[Explanation of symbols]

 1A, 1B: half cylindrical member 2A, 2B: corrugated tube 3A, 3B: flange portion 4: locking piece 5: claw 6: temporary fixing piece 7: claw 8: protruding piece 9: trough 10: crest 11: hole

Claims (2)

[Claims] 1. A pair of half-cylinder members (1A, 1B) each covering a butt portion of a pipe (2A, 2B) to be connected, each half-circumferentially projecting outward at both side edges. Flange portions (3A, 3B) that are formed, and one flange portion (3A) of the flange portions that overlap each other when a pair of half-cylinder members are combined in a cylindrical shape is attached to the other flange portion (3A).
B), wherein the half-tubular member (1) having the other flange portion (3B) is provided with a locking piece (4) for holding the pair of half-cylindrical members in a completely connected state by being hooked on the pair of half-cylindrical members.
A two-piece type pipe joint, wherein a protruding piece (8) is formed on an outer surface of B) in parallel with a portion of the other flange portion (3B) where the locking piece (4) is hooked. 2. A pair of half-cylinder members are completely connected to one of the flange portions (3A) overlapping each other when the pair of half-cylinder members (1A, 1B) are assembled in a cylindrical shape. The two-piece type pipe joint according to claim 1, characterized in that a temporary fixing piece (6) to be hooked on the mating flange portion (3B) is formed before the step is performed.