JPH0953779A - One touch connecting structure using block joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a one touch connecting structure by which two pipes having the same diameter can be joined to each other by arranging a connecting claw plate in either one of the two pipes, and also arranging a spring plate having engaging holes capable of engaging with claws of its connecting claw plate in the other in a structure to connect two pipes to each other. SOLUTION: When pipes 1 and 4 are connected to each other, the pipe 1 having a connecting claw plate 3 having two extending pieces having respectively claws 2 and the pipe 4 having a spring plate 6 having two extending pieces having respectively engaging holes 5, are inserted into inserting ports 7 and 8 of a block joint 10. When the connecting claw plate 3 and the spring plate 6 are opposed to each other and are slidingly moved, a tip taper part 18 of the spring plate 6 opens by sliding on taper parts 14 of the claws 2, and returns by springing-back force after passing through the claws 2, and the engaging holes 5 engage with the claws 2. In this condition, the block joint 10 is fastened by springing-back force of the connecting claw plate 3 and the spring plate 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting two pipes with one touch. More specifically, the present invention relates to a one-touch connection structure using a block joint in which a pipe is inserted into both ends of a block joint and at the same time a claw on one pipe side and an engagement hole on the other pipe side are engaged and locked.

[0002]

2. Description of the Related Art Conventionally known structures for connecting pipes with one touch are disclosed, for example, in Japanese Utility Model Publication No. 61-96077 and Japanese Utility Model Publication No. 62-176588.

First, the connection structure disclosed in Japanese Utility Model Laid-Open No. 61-96077 will be described with reference to FIG. 16. The first pipe 51 and a plurality of protrusions are provided on the outer periphery of the tip of the first pipe 51. Claw 52, a small diameter second pipe 53 fitted in the first pipe 51, and an engagement hole 54 attached to the outer periphery of the second pipe 53 and engageable with the claw 52. And the engaged plate 55.

The connection structure disclosed in Japanese Utility Model Laid-Open No. 62-176588 will be described with reference to FIG. 17. A resin block 62 having a first pipe 61 and a claw 62A attached to the first pipe 61. And the first pipe 61
A second pipe 63 whose tip portion is expanded so as to be fitted to the outer periphery of the second pipe 63, and an engagement which is attached to the second pipe 63 and extends in the pipe axial direction so as to be engageable with the claw 62 And an engaging plate 65 having a hole 64 formed therein.

[0005]

However, FIG.
In order to fit the pipe 53 into the pipe 51, it is necessary to use pipes having different basic diameters as the pipes 51 and 53. There was a problem that it could not be applied to pipes with the same diameter.

Further, in the connection structure of FIG. 17, since the pipe 61 is fitted in the pipe 63, it is necessary to form the expanded diameter portion 63A on only one pipe 61. Two pipes 6
Since the tips of 1,63 must be processed separately,
There was a problem that the manufacturing cost was high.

An object of the present invention is to provide a block joint in which two pipes having the same diameter can be joined to each other, and at the same time, even if the tips of the two pipes have the same shape, the production cost can be reduced. It is to provide a one-touch connection structure used.

[0008]

To achieve this object, the one-touch connection structure using the block joint of the present invention is constructed as follows.

(1) According to the first aspect of the present invention, a tapered portion is formed so that it can be fitted to either one of the two pipes, extends in the axial direction of the pipe for two or more, and becomes lower toward the tip. And a connection claw plate made of a metal plate having a claw, and an engagement member that is formed so as to be able to be fitted to the other of the two pipes and that extends in the pipe axial direction by two or more forks to engage with the claw of the connection claw plate. A spring plate made of a metal plate having a dowel hole, and two insertion ports formed so that two pipes of the same diameter can be inserted opposite to each other at both ends, and a connection claw plate and a spring plate are formed on the outer surface. And a block joint having a sliding surface formed so as to be slidable. According to this, two pipes of the same diameter are inserted into the insertion port of the block joint. At the same time, the tip of the spring plate slides open along the taper of the claw, and after passing through the claw, it returns with the force of the spring back, and the engagement hole of the spring plate engages with the claw of the connection claw plate and locks. .

(2) In the one-touch connection structure using the block joint according to the second aspect, the spring plate is formed with the tip taper portion in which the tip end is folded upward. According to this, at the time of connection, the spring plate smoothly slides on the tapered portion of the claw.

(3) In the one-touch connection structure using the block joint according to the third aspect, the spring plate is formed with a rising piece in which a part of the connecting claw plate which is engaged with the claw is raised. According to this, the strength of the engagement hole of the spring plate is improved, and the area of contact with the claw is increased.

(4) The one-touch connection structure using the block joint according to claim 4 is formed on the inner peripheral surface of the insertion port of the block joint and the outer periphery near the tip of the pipe, and becomes narrower toward the end of the block joint. It is provided with a tapered space and an O-ring mounted in this tapered space. According to this, for example, at the time of overpressure of the operation, the O-ring enters the taper which becomes gradually narrower and is compressed.

(5) In the one-touch connection structure using the block joint according to the fifth aspect, the external stress preventing cover for covering the tip of the spring plate engaged with the connection claw plate on the pipe provided with the connection claw plate. Is provided. According to this, an external force is prevented from acting on the tip portion of the spring plate.

(6) In the one-touch connection structure using the block joint according to the sixth aspect, the spring plate is formed in a bent shape which bulges outward in the middle.

(7) A one-touch connection structure using a block joint according to a seventh aspect is a rising engagement piece provided upright from a connection claw plate and provided with a bulge portion on an upper portion, and the rising engagement piece. A tip engaging portion formed on the tip of the spring plate so as to be engageable. According to this, the play of the pipe on both sides of the block joint,
It absorbs as the spring plate expands and contracts.

(8) In the one-touch connection structure using the block joint according to the eighth aspect, the tapered portion is formed at a portion other than the engaging portion at the tip of the connection claw plate. According to this, the tapered portion is held and lifted to release the engagement between the connection claw plate and the spring plate.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

FIGS. 1 and 2 show an embodiment of a one-touch connection structure using a block joint according to the present invention.

The one-touch connection structure using this block joint is one of the two pipes.
A connecting claw plate 3 that is formed to be attachable to the two forks (in this example, bifurcated) and extends in the pipe axial direction and has a claw 2, and to be attached to either one of the two pipes 4. A spring plate 6 having two or more forks (forked in this example) extending in the pipe axial direction and having an engagement hole 5, and insertion ports 7 and 8 for the pipes 1 and 4 formed at both ends and connected to the outer surface The claw plate 3 and the spring plate 6 are provided with a block joint 10 on which a sliding surface 9 is formed so as to be slidable.

Here, as shown in FIGS. 1 to 4, the connecting claw plate 3 has a fitting portion 12 in which a fitting hole 11 for fitting the first pipe 1 is formed, and this fitting portion 12 And two extension pieces 13 each of which has a claw 2 and which is formed to extend in a bifurcated shape from the above. The connection claw plate 3 is formed, for example, by pressing an elastic metal plate such as stainless steel. In this way, the connecting claw plate 3 has elasticity and is formed in a bifurcated shape so as to grip the block joint.

In this example, two claws 2 are provided side by side for each extension piece 13. The claw 2 is formed with a tapered portion 14 that becomes lower toward the tip. This tapered portion 14 is for smoothing the connection operation with the spring plate 6.

On the other hand, as shown in FIGS. 1, 2, 5 and 6, the spring plate 6 has a fitting portion 16 in which a fitting hole 15 for fitting the second pipe 4 is formed. It is provided with two extension pieces 17 each of which is formed to extend in a bifurcated shape from the fitting portion 16 and has an engagement hole 5. Like the connection claw plate 3, the spring plate 6 is made of an elastic metal plate such as stainless steel and is formed in a bifurcated shape, so that the block joint 10 is elastically clamped. In this example, two engagement holes 5 are provided for each extension piece 17 so as to correspond to the claws 2.

The spring plate 6 is formed with a tip taper portion 18 which is bent upward at the tip thereof. The tip taper portion 18 is provided so that the spring plate 6 can easily slide on the taper portion 14 of the pawl 2 at the time of connection so as to make the connection smooth. It also has a function of lifting the spring plate 6 at the time of disconnection to facilitate disconnection.

The spring plate 6 is formed with a rising piece 19 in which a portion hooked on the claw 2 is raised. The rising piece 19 is provided to improve the strength of the engagement hole 5 and to widen the area in contact with the claw 2.

The connecting claw plate 3 and the spring plate 6 are welded together,
The pipes 1 and 4 are attached by an appropriate fixing method such as caulking.

Further, the block joint 10 of this example
As shown in FIG. 1, FIG. 7 and FIG. 8, the whole is formed in a substantially square pole shape. The block joint 10 has a flow path 20 formed between the insertion ports 7 and 8 of the pipes 1 and 2 at both ends. Block joint 1
0 is molded from resin in this example, but the material is not particularly limited. The block joint 10 has a hole (not shown) formed in a surface other than the surface where the connection claw plate 3 and the spring plate 6 engage with each other, and a pressure sensor (for example, shown in the drawing) for measuring the fluid pressure in the block is formed in this hole. It is also possible to provide other sensors.

The two insertion ports 7 and 8 have the same size.
It is formed in a shape. Two outlets 7 in this example,
Both 8 are formed in two steps from the outside to the inside of the block joint 10. On the other hand, pipes 1 and 4
As shown in FIG. 9, each has the same diameter and the tip portion is formed in the same shape. In each of the pipes 1 and 4 of this example, a flange portion 21 is formed on the outer periphery near the tip, and a taper portion 22 is formed from the flange 21 to the pipe tip side. Then, as shown in FIG. 1, the first stage of the insertion ports 7, 8 of the block joint 10, that is, the outer stage 7
A tapered space 23 is formed between the inner peripheral surfaces of A and 8A and the tapered portions 22 of the pipes 1 and 4. An O-ring 24 is mounted in this tapered space 23.

When the connecting claw plate 3 and the spring plate 6 are engaged with each other and the O-ring 24 is locked by the force of the spring back, the O-ring 24 enters the taper of the tapered space 23 and is compressed by an appropriate amount. As a result, the sealing property and the vibration damping property are enhanced. Further, when a force for pressing the pipes 1 and 4 against the block joint 10 acts due to overpressure during operation, for example, the pipes 1 and 4 enter the taper and are compressed. Therefore, O
Even if a normal JIS standard is used as the ring 24,
It is possible to prevent deterioration of leakage accuracy due to variations in the crossing of parts.

The second end of the insertion ports 7, 8 of the block joint 10, that is, the end faces of the inner steps 7B, 8B are
This is the part where the pipes 1 and 4 abut. Further, the pipe base end side of the flange portion 21 of the pipes 1 and 4 is a set portion when the connection claw plate 3 and the spring plate 6 are attached.

According to the one-touch connection structure using the block joint constructed as described above, the pipes 1 and 4 are connected by one-touch as follows.

First pipe 1 with connection claw plate 3 attached
And the second pipe 4 to which the spring plate 6 is attached are inserted into the insertion ports 7 and 8 of the block joint 10.
Then, the bifurcated connection claw plate 3 and the spring plate 6 sandwich the block joint 10 and slide on the sliding surface 9 so as to face each other. Then, in the spring plate 6, the tip tapered portion 18 slides open on the tapered portion 14 of the claw 2,
After passing through the claw 2, it returns with the force of the spring back, and the engaging hole 5
Engages the pawl 2 and locks.

In the locked state, the block joint 10
Is tightened by the spring back force of the connection claw plate 3 and the spring plate 6. Therefore, the block joint 10 does not come off or shift from the connection claw plate 3 and the spring plate 6.

In this way, the pipes 1 and 4 are locked by simply inserting them into the block joint 10, and the connection is completed with one touch. With the spring-back force locked, the O-ring 24 enters the taper of the tapered space 23 and is compressed by an appropriate amount. Thereby, the sealing property and the vibration damping property are improved.

The one-touch connection structure using the block joint of the present invention is suitable for connection of pipes for car air conditioners, for example, because one-touch connection / disconnection can be performed with one hand, but not limited to this, it is generally applied to pipe connections. It is possible.

As shown in FIG. 1, the pipe 1 on which the connection claw plate 3 is provided is provided with an external stress prevention cover 25 formed in, for example, a U-shaped cross section and covering the tip of the spring plate 6. Good. The external stress prevention cover 25 prevents external force from acting on the tip portion of the spring plate 6 and thus prevents accidental detachment of the spring plate 6 from the connection claw plate 3.

FIG. 10 shows another embodiment of the one-touch connection structure using the block joint of the present invention.

The one-touch connection structure using this block joint has a bent shape (for example, a dogleg shape) in which the extension piece 17 of the spring plate 6 bulges outward in the middle as shown in the drawing.
Is formed. This is intended to absorb the rattling of the pipes 1 and 2 on both sides of the block joint 10 by extending and contracting the spring plate 6.

Further, as the engaging structure of both pipes 1 and 2, the following structure is added together with the combination of the engaging hole 5 and the claw 2. That is, the engagement structure is as shown in FIG.
As shown in FIGS. 0 to 14, a rising engagement piece 30 that is integrally formed with the connection claw plate 3 and is provided upright from the fitting portion 12, and a spring plate 6 that can be engaged with the rising engagement piece 30. And a tip engaging portion 31 formed at the center of the tip in the width direction. The rising engagement piece 30 has a bulging portion 32 whose upper end bulges in the shape of, for example, a horizontal U on the block joint 10 side. The tip end engaging portion 31 is engaged and locked below the bulging portion 32.

The left and right sides of the tip engaging portion 31 of the spring plate 6 are tapered piece portions 33 which are formed by being bent up in a tapered shape. That is, when the engagement between the tip end engaging portion 31 of the spring plate 6 and the rising engagement piece 30 is released, the tip end engaging portion 3 is lifted by holding the taper portion 33.
1 is detached from the bulging portion 32 of the rising engagement piece 30 with one touch.

The rising piece 19 of the spring plate 6 of this example is formed with a slight taper, as shown in FIG. The reason for forming the taper shape in this way is that when it is made vertical, the shear stress acts strongly and the possibility of breakage increases, whereas when it is made taper, the shear stress weakens and it becomes difficult to break.

Further, the block joint 10 of this example
10, the insertion ports 7 and 8 are not formed in a step shape, but are formed in the same cylindrical surface shape as the flow path 20. On the other hand, the flange portions 21 of the pipes 1 and 4 in this example are
Block joint 10 with no taper on the pipe tip side
It comes to abut on the end face of the. Also, the pipe 1,
In No. 4, a ring groove 34 is formed on the outer periphery of the tip end portion so that the O-ring 24 can be mounted. According to this example,
Since the structure of the block joint 10 is simplified, the cost can be further reduced.

The present invention is not limited to the above-described embodiments, but various modifications can be implemented.

For example, in the above-mentioned embodiment, the block joint 10 is formed in the shape of a quadrangular prism (the end surface is a quadrangle), but the invention is not limited to this, and the end surface shape is a hexagon or more polygon,
Alternatively, it may be round or the like.

Further, in the above-mentioned embodiment, the connecting claw plate 3 and the spring plate 6 are formed in a bifurcated shape, but the present invention is not limited to this and may be three or more. The numbers of the claws 2 and the engagement holes 5 are not limited.

[0045]

The one-touch connection structure using the block joint of the present invention described above has the following effects.

(1) In the one-touch connection structure using the block joint according to claim 1, the pipe is inserted into the block joint, and the pipes are not fitted to each other. Therefore, even if the basic shapes of the two pipes are the same, one-touch connection is possible. Further, since it is sufficient that the two pipes have the same tip end shape, the manufacturing cost can be reduced.

(2) According to the one-touch connection structure using the block joint according to the second aspect, the tip tapered portion of the spring plate smoothly slides on the tapered portion of the pawl at the time of connection.
Therefore, the connection operation can be smoothly performed.

(3) According to the one-touch connection structure using the block joint according to the third aspect, the rising piece is formed at the portion of the spring plate that is caught by the claw. Therefore, by increasing the strength of the engagement hole of the spring plate and widening the area of engagement with the claw, a connection structure with excellent durability can be realized.

(4) According to the one-touch connection structure using the block joint of claim 4, a tapered space is formed which is narrowed toward the end of the block joint formed between the inner peripheral surface of the block joint and the pipe. An O-ring is attached. The O-ring is compressed by an appropriate amount while being locked by the force of the spring back. Thereby, the sealing property and the vibration damping property are improved. Furthermore, when a force that presses the pipe against the block joint acts due to overpressure during operation, the O-ring enters the taper and is compressed. Therefore, the standard JIS O
Even in the case of a ring, it is possible to prevent deterioration of leakage accuracy due to variations in the crossing of component dimensions.

(5) According to the one-touch connection structure using the block joint of claim 5, since the external stress preventing cover covers the tip of the spring plate engaged with the connecting claw plate, the tip of the spring plate is externally exposed. Prevent force from acting. Therefore, accidental disconnection can be prevented.

(6) According to the one-touch connection structure using the block joint of claim 6, the play of the pipes on both sides of the block joint is absorbed by the expansion and contraction of the spring plate. Therefore, it is possible to prevent looseness of the pipe and accidental disconnection or damage of the connection state.

(7) According to the one-touch connection structure using the block joint according to the seventh aspect, the leading end engaging portion of the spring plate is attached to the rising engaging piece of the connecting pawl plate along with the engagement between the pawl and the engaging hole. Engage. Therefore, the connection state of both pipes can be made more reliable.

(8) According to the one-touch connection structure using the block joint according to the eighth aspect, the connection claw plate and the spring plate are engaged with each other by lifting by holding the taper portion formed at the tip of the connection claw plate. Can be easily released with one touch.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of a one-touch connection structure using a block joint of the present invention.

FIG. 2 is a plan view of a one-touch connection structure using the block joint of FIG.

3 is a vertical cross-sectional view of a connection claw plate used in the connection structure of FIG.

FIG. 4 is an end view of the connection claw plate of FIG. 3 viewed from a direction of an arrow L.

5 is a vertical cross-sectional view of a spring plate used in the connection structure of FIG.

FIG. 6 is a plan view of the spring plate of FIG.

7 is a vertical cross-sectional view of a block joint used in the connection structure of FIG.

8 is an external view of the block joint of FIG.

9 is a vertical cross-sectional view of a tip portion of a pipe used in the connection structure of FIG.

FIG. 10 is a longitudinal sectional view of another embodiment of the one-touch connection structure using the block joint of the present invention.

11 is a plan view of a one-touch connection structure using the block joint of FIG.

12 is an end view of a one-touch connection structure using the block joint of FIG.

13 is a perspective view of a connection claw plate used in the connection structure of FIG.

FIG. 14 is a perspective view of a spring plate used in the connection structure of FIG.

15 is a partially enlarged view of the connection structure of FIG.

FIG. 16 is a vertical cross-sectional view of an example of a conventional one-touch connection structure.

FIG. 17 is a vertical cross-sectional view of another example of the conventional one-touch connection structure.

[Explanation of symbols] 1 pipe 2 claw 3 connection claw plate 4 pipe 5 engaging hole 6 spring plate 7 insertion port 8 insertion port 9 sliding surface 10 block joint 14 taper portion 18 tip taper portion 19 rising piece 23 taper space 24 O-ring 25 External stress prevention cover 30 Standing engaging piece 31 Tip engaging part 32 Bulging part 33 Tapered part

Claims (8)

[Claims] 1. In a structure for connecting two pipes,
A connecting claw plate made of a metal plate having a claw formed so that it can be fitted to either one of the two pipes, extending in the pipe axial direction more than two forks, and having a tapered portion that becomes lower toward the tip, A spring plate made of a metal plate that is formed so as to be fittable to either the other of the two pipes and that is formed to extend in the pipe axial direction in two or more forks and that has an engaging hole that can engage with the claw of the connection claw plate, Two insertion ports are formed at both ends so that the two pipes can be inserted so as to face each other, and a sliding surface on which the connecting claw plate and the spring plate are slidably formed is formed on the outer surface. A one-touch connection structure using a block joint, characterized in that the block joint is formed. 2. The one-touch connection structure using a block joint according to claim 1, wherein the spring plate has a tip taper portion formed by folding the tip of the spring plate upward. 3. The one-touch connection using a block joint according to claim 1, wherein the spring plate is formed with a rising piece in which a part of the connection claw plate that engages with the claw is raised. Construction. 4. A tapered space formed on the inner peripheral surface of the insertion port of the block joint and the outer periphery near the tip of the pipe and narrowing toward the end of the block joint, and an O-ring mounted in the tapered space. The one-touch connection structure using the block joint according to claim 1, further comprising: 5. The external stress preventing cover for covering the tip of the spring plate engaged with the connecting claw plate is provided on the pipe provided with the connecting claw plate.
One-touch connection structure using the described block joint. 6. The spring plate is formed in a bent shape that bulges outward in the middle.
One-touch connection structure using the described block joint. 7. A rising engagement piece which is provided upright from the connection claw plate and has a bulge portion at an upper part thereof, and a tip engagement member which is formed at a tip end of the spring plate so as to be engageable with the rising engagement piece. A joint part is provided, The joint part 1 characterized by the above-mentioned.
One-touch connection structure using the described block joint. 8. A taper portion is formed at a portion other than an engaging portion at a tip of the connecting claw plate.
One-touch connection structure using the described block joint.