JP3326398B2 - Supply / exhaust pipe retaining device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing a standard-size air supply / exhaust pipe having a receiving port formed at one end thereof and an insertion port formed at the other end thereof, when the pipe is connected thereto.

[0002]

2. Description of the Related Art In the case of a supply / exhaust pipe (including a single pipe or a double pipe) for a combustion apparatus or a supply / exhaust pipe for introducing or exhausting outside air, a pipe manufactured to a predetermined length in advance is extended by extension. Generally, piping is used. In the case of piping by such a construction method, a retaining device is usually provided for each piping material so that the supply / exhaust pipe does not fall off at the connection portion.

FIGS. 5 (a) and 5 (b) show an example of this retaining device. In this device, an elastic claw plate 2 is attached to an inner surface of a receiving port 1 in a depth direction. As shown in (2), when the insertion port 3 side of the other pipe is inserted to a predetermined position, the elastic claw plate 2 engages with the inside of the circumferential groove 4 on the insertion port 3 side to prevent slipping.

This retaining device is the simplest type, but the angle of the elastic claw plate 2, the shape of the circumferential groove 4, the clearance between the inner diameter of the receiving port 1 and the outer diameter of the insertion port 3, etc. are optimal. If not, the strength against pulling out may be small, and stable strength may not be obtained. or,
In this retaining device, when the tube is pulled out, it is necessary to rotate the tube and align the elastic claw plate 2 with the groove 5 for pulling out, which is troublesome.

FIGS. 6 (a) and 6 (b) show another retaining device. This device has a wire receiving groove 6 formed in a receiving port 1 side, and a C-shaped groove is formed in the wire receiving groove 6. FIG. The lock wire 7 is housed, and when the insertion slot 3 is inserted to a predetermined position, the circumferential groove 4 formed on the insertion slot 3 is aligned with the housing groove 6, and in this state, the lock wire 7 is removed. When the diameter is reduced using the metal fitting 8 outside the receptacle 1,
The lock wire 7 is engaged with both the accommodation groove 6 and the circumferential groove 4 to prevent the groove from coming off.

This device has the advantage that the stopper acts on almost the entire circumference of the pipe. However, it is necessary to adjust the diameter of the lock wire 7 or to increase the diameter of the lock wire 7 or to operate the metal fitting 8 each time it is attached or detached. However, there is a problem that the attachment / detachment of the tube cannot be performed with one touch.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned point, and an object of the present invention is to prevent insertion only by inserting an insertion slot into a receptacle. When it is inserted, it keeps stable strength against pulling out, but when pulling out the connected tube once,
An object of the present invention is to provide a supply / exhaust pipe retaining device which can be operated by one-touch operation without rotating the pipe.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a receiving port is formed at one end and an insertion port is formed at the other end in a supply / exhaust pipe retaining device. In the fixed-size supply / exhaust pipe, a cut window is cut out on the receptacle side, a stopper is formed at the rear end outside this cut window, and a lock portion is engaged with the front end direction and a front end side from the lock portion. A lock member having a portion formed therein is slidably mounted in a longitudinal direction of the tube, and further, the lock member slides in a tube end direction so that the lock portion falls down from the cutout window toward the center of the tube. A locking bag wall is formed to prevent the distal end of the portion from being engaged from the inside and to escape in the radial direction. When the receptacle of another pipe is inserted to a predetermined position on the insertion port side, the cut window is formed. And the lock member The lock member and the engaging portion are formed to form a circumferential groove for preventing the falling out, and after connecting the pipe, when a force in the pulling direction acts, the lock member slides in the pulling direction together with the pipe. Then, the distal end of the engaging portion of the lock member comes into contact with the locking bag wall, where the engaging portion is pressed and the pull-out strength is increased by the action of the wedge. Together, the tip of this engaging portion is released from the locking bag wall, and in this state, the connection is released by pulling out the insertion port side while pressing the stopper formed at the rear end of the locking member with a fingertip. It is characterized in that it is configured to be able to perform.

Further, in the invention according to claim 2,
A cover-shaped escape space is integrally formed on the entrance side of the lock bag wall according to the first aspect of the present invention, and a slide guide of the lock member is integrally formed.

Further, in the invention according to claim 3,
The lock portion and the engagement portion of the lock member according to the first aspect of the present invention are characterized by being formed by bending an elastic plate into a V or U shape.

Further, in the invention described in claim 4,
In the supply / exhaust pipe retaining device, a receiving port is formed at one end, and a fixed-size supply / exhaust pipe having an insertion port formed at the other end.
A lock member in which a cut window is formed on the receiving port side, a stopper is formed at the rear end outside the cut window, and a lock portion and a horizontal engagement portion which are substantially perpendicular to the front end direction and formed in an L-shape. Attached slidably in the pipe axis direction, on the insertion port side, when inserted to a predetermined position in the receptacle of another pipe, opposed to the cut window, the lock portion of the lock member falls down to prevent it from falling out After forming a circumferential groove and connecting the pipe, when a force in the pulling direction is applied, the locking member slides together with the pipe in the pulling direction and the horizontal end of the locking portion of the locking member is cut out. The wedge shape is inserted into the edge of the lock member to prevent it from falling off.On the other hand, once the insertion port side is slightly pushed in, the lock member is retracted together, and this horizontal end is removed from the inside of the edge of the cut window. Stopper formed at the rear end By pulling out the insertion port side while pressing in the preceding and is characterized by being configured so as to be able to disconnect.

[0012]

In order to connect the pipes, when the insertion port side is inserted into the receptacle, the locking member retreats together with the insertion port, and the locking portion of the locking member hits the edge of the cut window and stops. When the insertion slot is further inserted, the lock portion of the lock member rides on the outer peripheral surface of the insertion slot, and once escapes from the cutout window, when the insertion slot is inserted to a predetermined position, the lock portion is rotated around the insertion slot side. It fits into the groove, falls into the circumferential groove by its elastic action, and fits. When the tube is slightly pulled in this state, the lock member is pulled together and slides forward, and the tip of the engaging portion strikes into the lock bag wall and stops. Alternatively, the horizontal end of the lock enters the edge of the cut window and stops. This state is a locked state. In this state, when a force in the pulling direction acts on the tube, a force in the pulling direction acts on the lock member together with the tube. At this time, since the tip of the engaging portion is pressed by the locking bag wall, a wedge effect acts on the locking portion, so that the locking portion is firmly fitted into the circumferential groove.

When the tube is pulled out, the locking member is retracted by slightly pushing the insertion port side to release the engaging portion from the locking bag wall, and then the stopper at the rear end of the locking member is pressed with a fingertip. If the insertion port side is pulled as it is, the lock portion is lifted along the edge of the circumferential groove and escapes from the cut window, so that it can be easily pulled out as it is.

[0014]

[Embodiment 1] This embodiment corresponds to claims 1 and 3, and FIGS. 1 and 2 show a specific structure and an operation example thereof. First, in FIG. 1, reference numeral 10 denotes a retaining device according to the present invention. The device 10 cuts a cutout 11 on the receiving port 1 side and, outside the cutout 11,
A lock portion 13 that can be freely dropped from the incision window 11 toward the center of the tube and an elastic lock member 12 having an engagement portion 14 formed on the distal end side of the lock portion 13 are slidably attached. When the lock portion 13 of the lock member 12 slides in the direction of FIG.
The locking bag wall 16 is formed to prevent the distal end 14a from engaging with the inside from escaping in the radial direction. In the figure, reference numeral 15 denotes a slide guide for slidably attaching the lock member 12 to the surface of the tube, and reference numeral 12a denotes a stopper formed at the rear end of the lock member 12. In the present embodiment, the lock portion 13 of the lock member 12 has a V-shape, but may have a U-shape, and the shape is not particularly limited.

On the other hand, when the insertion port 3 side is inserted into the receiving port 1 of the other pipe to a predetermined position, the locking portion of the locking member 12 is located at the insertion port 3 side. A circumferential groove 4 is formed in which the groove 13 engages. This structure is the same as the structure of the conventional insertion opening. In the embodiment, the circumferential groove 4 is formed in an inverted trapezoidal shape, but may be formed in a semicircular shape.

An example of connection and withdrawal of tubes in this embodiment will be described with reference to FIG. First, in the case of connection, when the insertion port 3 side of the other pipe is directly inserted into the receiving port 1, the tip 3a of the insertion port 3 first engages with the lock portion 13 of the lock member 12 (FIG. 2A). (Dotted line), when pressed as it is, the lock member 12 retreats together, and the lock portion 13
1 and stops (solid line in FIG. 2 (a)). Insertion slot 3
When the side is inserted, the lock portion 13 is pushed up by the distal end 3a of the insertion slot 3 and escapes out of the cut window 11 (dotted line in FIG. 2B). Then, when the insertion slot 3 is inserted to a predetermined position,
The circumferential groove 4 fits below the lock portion 13, and the lock portion 13 falls into the circumferential groove 4 by its elastic action (FIG. 2C). The connection may be kept as it is, but the insertion member 3 is slightly pulled, the locking member 12 is slid together, the engaging portion 14 is inserted into the locking bag wall 16, and the tip 14 a is brought into contact with the locking bag wall 16. Keep it. In this manner, when a force in the pulling direction is applied to the tube, the distal end 14a of the engaging portion 14 is pressed by the locking bag wall 16, so that the locking portion 13
The wedge effect acts on the peripheral groove 4 to strengthen the fitting relationship with the circumferential groove 4 (FIG. 2D).

When the tube is pulled out, as shown in FIG. 2 (e), the insertion port 3 is pushed in once and the locking member 12 is retracted together, so that the distal end 14a of the engaging portion 14 is pulled out.
From the locking bag wall 16. Then, as shown in FIG. 2 (f), the stopper 12a of the lock member 12 is pressed with a fingertip and the insertion opening 3 side is pulled, so that the lock portion 13
Is lifted along the edge of and escapes out of the cutting window 11.
As a result, the tube can be easily pulled out as it is.

[0018]

[Embodiment 2] This embodiment corresponds to claim 2.
An escape space (cover) 16a is integrally formed in front of the lock bag wall 16, and the slide guide 15 is further integrated to cover the lock member 12 and the cutout window 11 from the outside to improve the appearance. In essence, Example 1
There is no difference. Note that, in FIG. 3, the same reference numerals as those in FIG. 2 indicate the same parts and have the same functions, and thus description thereof will be omitted.

3A shows a state in which the insertion slot 3 is inserted into the receptacle 1, FIG. 3B shows a state in which the insertion is completed,
(C) shows the tip 1 of the engaging portion 14 when the pulling force acts on the pipe.
4a is pressed by the locking bag wall 16 and the locking portion 13
The wedge effect is applied to the state, the state of the retaining force is increased,
(D) shows a state in which the insertion port 3 is pulled out while pressing the stopper 12a of the lock member 12 with a fingertip.

[0020]

[Embodiment 3] This embodiment corresponds to claim 4, and this embodiment is, as shown in FIGS.
A lock member 12 having a lock portion 13 formed of a vertical portion 13a and a horizontal end 13b is slidably attached to the outside of the cut window 11. 4, the same reference numerals as those in FIG. 2 denote the same parts, and have the same functions, and therefore, the description thereof will be omitted.

In this embodiment, when the insertion port 3 side is inserted into the receiving port 1 of the other pipe to a predetermined position, the circumferential groove 4 faces the cut window 11 and the lock portion 13 of the lock member 12 is locked. Falls into the circumferential groove 4. (FIG. 4 (a)). Then, when the insertion port 3 side is slightly pulled, the lock member 12 is pulled together.
Moves forward, and the horizontal end 13b of the lock portion 13 enters the edge 11a of the cut window 11 in a wedge shape (FIG. 4B). Locking is performed in this state. The operation of pulling out the pipe is described in Examples 1 and 2.
Is the same as

[0022]

As described above, the present invention employs a locking mechanism in which a wedge effect acts on the lock portion of the lock member, so that the strength against pull-out is greatly increased. That is, as long as the lock member, the tube, the lock bag wall, and the like are not deformed or damaged, they do not come off. As a result, a highly safe supply / exhaust pipe retaining device can be obtained. Also, the lock works by simply inserting the insertion port side into the receiving port, while when pulling out, by pushing the insertion port side once and holding down the lock member,
The tube can be pulled out as it is, and all can be attached and detached with one touch.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a retaining device according to a first embodiment.

FIG. 2 is an explanatory diagram of the operation of the retaining device according to the first embodiment.

FIG. 3 is an explanatory diagram of a second embodiment.

FIG. 4 is an explanatory diagram of a third embodiment.

FIG. 5 is an explanatory view showing an example of a conventional retaining device.

FIG. 6 is an explanatory view showing an example of a conventional retaining device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reception port 3 Insertion port 3a Tip 4 Circumferential groove 10 Retaining device 11 Incision window 12 Lock member 12a Stopper 13 Lock portion 13a Vertical portion 13b Horizontal end 14 Engagement portion 14a Tip 15 Slide guide 16 Locking bag wall 16a Escape space

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-255790 (JP, A) JP-A-9-324886 (JP, A) JP-A-10-185055 (JP, A) JP-A-10- 185038 (JP, A) JP-A-10-26342 (JP, A) JP-A-10-54488 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 37/00-39 / 06

Claims (4)

(57) [Claims] 1. A fixed-size air supply / exhaust pipe having a receiving port formed at one end and an insertion port formed at the other end, wherein a cut window is cut out on the receiving port side, and a cut window is formed outside the cut window at a rear end. A stopper is formed, and a lock member having a lock portion in the front end direction and an engagement portion formed on the distal end side of the lock portion is slidably attached in the longitudinal direction of the tube, and further, the lock member slides in the tube end direction. In a state where the lock portion is lowered toward the center of the pipe from the cutout window, a lock bag wall is formed to prevent the distal end of the engagement portion from being engaged from the inside to escape in the radial direction, and the insertion port side When the socket of the other pipe is inserted to a predetermined position, a circumferential groove is formed to oppose the cut window, to prevent the lock portion and the engagement portion of the lock member from dropping and to prevent the pipe from falling off. After connection, pull-out direction force was applied At this time, the lock member slides in the pulling-out direction together with the tube so that the tip of the engaging portion of the lock member abuts against the locking bag wall, where the engaging portion is pressed and the pull-out strength is reduced by the action of the wedge. On the other hand, once the insertion member side is slightly pushed in, the locking member is retracted together to release the front end of the engaging portion from the locking bag wall, and in this state, the stopper formed at the rear end of the locking member is finger-tip. A device for preventing the supply / exhaust pipe from being detached, wherein the connection can be disconnected by pulling out the insertion port side while holding down. 2. A device for preventing a supply / exhaust pipe from coming off, wherein a cover-like escape space is integrally formed on the entrance side of the lock bag wall of claim 1 and a slide guide of a lock member is integrally formed. 3. The retaining device for a supply / exhaust pipe according to claim 1, wherein the lock portion and the engagement portion of the lock member are formed by bending an elastic plate into a V or U shape. 4. A fixed-size supply / exhaust pipe having a receiving port formed at one end and an insertion port formed at the other end, wherein a cut window is formed on the receiving port side, and a stopper is provided at a rear end outside the cut window. A lock member having a substantially vertical lock portion and a horizontal engagement portion formed in an L-shape in the front end direction is slidably attached in the tube axis direction, and the insertion port side is provided in a receiving port of another pipe. When inserted to a predetermined position, the locking portion of the locking member opposes the cutout window to form a circumferential groove for preventing the fall-off, and after connecting the pipe, a force in the pull-out direction was applied. Sometimes, the lock member slides in the pulling-out direction together with the pipe so that the horizontal end of the lock portion of the lock member enters the edge of the cut window in a wedge shape to prevent it from falling off, while once slightly pushing the insertion port side. To retract the lock members together, The horizontal end of the lock member is removed from the inside of the edge of the cut window, and in this state, the connection can be disconnected by pulling out the insertion port side while pressing the stopper formed at the rear end of the lock member with a fingertip. Exhaust pipe retaining device.