JP3053563U - Connection structure of duct for fluid distribution system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely attach a connecting member of a duct by a hollow bar in a fluid duct and a distribution system using a hollow bar made of aluminum. SOLUTION: The structure for connecting a duct for a fluid distribution system under pressure or under reduced pressure, comprising:
Has a flange (18) having a diameter larger than the outer diameter of the joint body (15) around the support surface, and one radial surface of the flange (18) is in contact with the end surface of the hollow bar (10). The opposite radial surface forming (19) is an engagement surface (20) and interacts with one or more fixing brackets (21) fixed to the hollow bar (10).

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates generally to systems for the circuit and distribution of fluids, such as compressed or decompressed air or other gases and liquids, and more particularly to hollow bars used as ducts for such fluids. Connection structure for connecting in a straight line or at an angle.

[0002]

[Prior art]

 The use of hollow bars for guiding and distributing gases or liquids is already known. The hollow bar proposed by the present applicant preferably has a quadrangular cross-section having a centrally extending hollow portion with a circular cross-section and extending longitudinally on both sides and a channel-like groove opening outwardly. Made of extruded aluminum. Such bars are modular, linear or bent, with other bars of the same type, using an essentially annular tubular connecting member and a removable connecting plate or bracket to secure it. Connected to.

[0003] Each tubular connecting member is angled in a straight, T-shaped or cross-shaped manner and has one or more branched inserts, which are inserted into the hollow of the bar. And at least one packing around the periphery to seal fluid at a boundary between the connecting member and the inner surface of the hollow portion.

The connecting plate or bracket is fixed by screw means to a slide inserted in the channel-like groove of the bar to be connected there, connecting the bars to each other and to the joint. Used to store.

However, such a connection structure of the duct has the following disadvantages.

[0006] Each connection member has at least one seal packing, but is forcibly inserted into the hollow of the bar, is not sufficiently fixed to the bar itself, and is distributed. The bar may move inward or outward with respect to the bar due to the force of the fluid. Therefore, the safety of the system is impaired, especially when the connecting member has a closed one end face at the end of the connecting member and is used as a stopper for closing the hollow portion of the bar.

Further, the connection plate or the bracket connects the ends of the bars to each other without directly engaging with the connection member. Therefore, if the joints are straight or elbow-shaped or have different lengths, the shape of the plate or bracket to be mounted across the different shapes must be adapted to the different shapes. In addition, there was the inconvenience that many types had to be prepared or the types of joints had to be limited. In order for them to further engage with the connecting member, the mounting structure of the bracket and the connecting member must be further provided, so that the entire assembly becomes complicated.

[0008]

[Problems to be solved by the invention]

 It is an object of the present invention to overcome the above-mentioned disadvantages and disadvantages of the prior art and to improve the quality and safety of fluid ducts and distribution systems using hollow bars of aluminum profile. More specifically, an object of the present invention is to provide a connection structure for easily and surely attaching a connection member to a duct formed by a hollow bar.

[0009]

[Means for Solving the Problems]

 An object of the present invention is to provide a duct connecting structure for distributing a fluid under pressure or reduced pressure while maintaining the structure of the hollow duct bar, wherein the central hole has a substantially quadrangular cross section and extends in the longitudinal direction. A duct formed from an aluminum extruded hollow bar having a side wall surrounding the central hole, and a channel-like groove extending in the longitudinal direction of the side wall and opening to the outside of the side surface; At least one insertion end having a base portion that extends and is partially inserted into and fixed to the passage-shaped groove; and at least one seal packing that can be inserted into the central hole of the hollow bar. A connection member provided with a tubular joint body having a flange, the connection member having a flange having a diameter larger than the outer diameter of the joint body, and a radial direction on the insertion side of the flange. A surface forms a support surface that abuts against the end surface of the duct, and an opposite radial surface forms an engagement surface that engages with the fixing bracket, and the fixing bracket includes one end of the base. The connection structure is characterized in that the connection structure has a bent portion which is bent from an edge to an end surface side of the hollow bar, extends so as to surround the joint body, and engages with an engagement surface of the flange.

[0010] The joint body preferably has an annular groove or step near the engagement surface, which increases the area of the engagement surface.

Therefore, the flange comes into contact with the end face of the duct, and accurate positioning of the connection member can be performed. The abutment of the collar also prevents the connecting member itself from completely, accidentally or undesirably entering the hollow portion of the bar. On the other hand, the engagement between the fixing bracket and the flange ensures the contact of the flange with the end surface of the bar, and at the same time, ensures that the connection member is prevented from coming off.

The flange of the joint body has at least the following advantages.

[0013] The tubular connecting member does not completely enter the inserted hollow bar.

[0014] Preferable locking of the connecting member by the fixing bracket is obtained.

[0015] The hollow bar has a high resistance to the force of the fluid for discharging the connecting member from the central hole.

The support and axial fixation of the connecting member provides high reliability in the fluid distribution system under fluid under pressure or under vacuum or reduced pressure.

After the connecting member is mounted in the hollow portion of the hollow bar, the fixing bracket can be similarly attached to the hollow bar separately from the connecting member, so that assembly is extremely simple.

[0018]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

A hollow bar 10 for a fluid duct system to be dispensed is shown in FIG. This hollow bar is formed by extruding aluminum so as to have a central hole 11 extending in the longitudinal direction and a channel-like groove 12 extending on both sides in the longitudinal direction and opening to the outside. It has a structure. Side holes 13 can be formed on both sides of the hollow bar 10 for the outlet of the fluid used. The hollow bar 10 thus formed can be cut to any length. The hollow bar 10 can also include at least one connecting member 14 for connecting successively adjacent bars or other members or for closing the ends of these ducts.

The connecting member 14 has a joint body 15, which is essentially tubular and has an annular cross-section, with at least one pressure-tight seal packing 16 interposed between the hollow bar It has at least one insertion end 15 'which can be inserted into the central hole 11 of the ten. The insertion end 15 'of the joint body 15 has at least one circumferential groove 17 for a seal packing 16 and one circumferentially extending collar having a diameter larger than the outer shape of the joint body corresponding to the insertion end 15'. 18.

The collar 18 has a foremost radial surface facing the seal packing 16, which forms a support surface 19 for abutting the end surface of the hollow bar 10 on which the connecting member 14 is mounted. I do. The opposite radial surface of the flange 18 forms an engaging surface 20 and at least one bracket 21 provided for fixing the connecting member 14 in the axial direction of the hollow bar 10 and the engaging surface 20. Are engaged.

In order to increase the area of the engaging surface 20 in the vicinity of the engaging surface 20 in the main body 15 of the joint, as compared with the area of the support surface 19 on the opposite side of the engaging surface 20, preferably, a stepped portion is provided. Alternatively, an annular groove 20 'is formed.

As shown in FIG. 2, the fixing bracket 21 has a base 21 ″ extending along the longitudinal direction of the hollow bar 10, and the base has a plate-like shape. As shown in FIG. 10, a plurality of screws 22 are inserted through the base 21 ″ of the fixing bracket 21 in a state where the plate-like insertion pieces 23, 23 are inserted into each of the passage grooves 12 of the hollow bar 10. It is fixed by screwing into the piece 23 and tightening. The fixing bracket 21 has a bent portion 21 ′ that bends from one end edge of the base 21 ″, which is applied to the connecting member 14 when the fixing bracket 21 is fixed to the hollow bar 10. The connection member 14 is surrounded at the position of the step or the groove 20 ′ and is engaged with the engagement surface 20 so as to fix the connection member 14 to the hollow bar 10.

If desired, this connecting member 14 can be straight, elbow, T-shaped or cruciform, sleeve-shaped (FIG. 3), sleeve-shaped (male) with external threaded portions 15 ″. Nipple (Fig. 4), sleeve with hexagonal hole (Fig. 5), sleeve with flange (Fig. 6), sleeve with two outer diameters (reduced joint) (Fig. 7), or other It may be in the form of a sleeve, each having at least one packing and having a circumferentially extending collar for the above function.

[0025]

[Effect of the invention]

 As is apparent from the above description, the duct connection structure for the fluid distribution system according to the present invention allows easy and reliable connection without impairing the safety of the system.

[Submission date] June 25, 1998

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

[Means for Solving the Problems]

An object of the present invention is to provide a duct connecting structure for distributing a fluid under pressure or reduced pressure while maintaining the structure of the hollow duct bar, wherein the central hole has a substantially quadrangular cross section and extends in the longitudinal direction. A duct formed from an aluminum extruded hollow bar having a side wall surrounding the central hole, and a channel-like groove extending in the longitudinal direction of the side wall and opening to the outside of the side surface; At least one insertion end having a base portion that extends and is partially inserted into and fixed to the passage-shaped groove; and at least one seal packing that can be inserted into the central hole of the hollow bar. and a connecting member having a tubular joint body having, the connecting member has a flange having a diameter larger than the outer diameter of the joint body, and the radius direction of the insertion end side of the collar Surface forms a supporting surface that abuts against the end face of the duct, and the opposite radial surface forms an engaging surface that engages with the fixing bracket, and the fixing bracket includes the base portion. The connection structure is characterized in that the connection structure has a bent portion which is bent from one end edge of the hollow bar toward the end surface side of the hollow bar, extends so as to surround the joint body, and engages with the engaging surface of the flange.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a hollow bar having a fluid outlet hole on a side.

FIG. 2 is a perspective view showing a fixing bracket.

FIG. 3 is a perspective view showing one embodiment of a connection structure according to the present invention.

FIG. 4 is a partial sectional view showing another embodiment of the connection structure according to the present invention.

FIG. 5 is a partial sectional view showing still another embodiment of the connection structure according to the present invention.

FIG. 6 is a partial sectional view showing still another embodiment of the connection structure according to the present invention.

FIG. 7 is a partial sectional view showing still another embodiment of the connection structure according to the present invention.

FIG. 8 is a plan view showing still another embodiment of the connection structure according to the present invention.

FIG. 9 is a partial cross-sectional view showing one use example of the connection structure according to the present invention, in which a fixing bracket is attached to a hollow bar and a joint.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hollow bar 11 Central hole 12 Channel-like groove 14 Connecting member 15 Joint body 15 'Insertion end 15 "screw part 16 Seal packing 18 Flange 20 Engagement surface 20' Step or annular groove 21 Bracket 21 'Bent part 21" base 22 Screw 23 Insert

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[Procedure amendment]

[Submission date] June 25, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

Claims (11)

[Utility model registration claims] 1. A connecting structure for a duct for distributing a fluid under pressure or reduced pressure, comprising: a central hole having a substantially quadrilateral cross section and extending in a longitudinal direction;
A duct formed from an extruded aluminum hollow bar having a side wall surrounding the central hole and a channel-like groove extending in the longitudinal direction of the side wall and opening outside the side surface; and extending along the longitudinal direction of the hollow bar. A fixing bracket having a base and partially inserted into and fixed to the passage-like groove; and at least one insertion end including at least one seal packing insertable into the central hole of the hollow bar. A connection member having a tubular joint body, the connection member has a flange having a diameter larger than the outer diameter of the joint body, and the radial surface of the flange on the insertion side, the A support surface that abuts against the duct end surface, and an opposite radial surface forms an engagement surface that engages with the fixing bracket, and the fixing bracket extends from one end edge of the base. The connecting structure whose serial bent into the hollow bar end surface of said has a bent portion for engaging the engagement surface of the to extend the collar around the joint body, characterized in that. 2. The joint body has a step or an annular groove near the engaging surface, and a height from a bottom of the step or the annular groove to a peripheral edge of the engaging surface is a peripheral surface of the joint body. The step or the annular groove is formed such that the height of the bracket is larger than the radial height of the support surface, and the bent portion of the bracket is engaged with the joint body at the step or the annular groove. The connection structure according to claim 1, wherein: 3. The joint body according to claim 1, wherein the joint body has a straight shape, an elbow shape, a T shape, or a cross shape.
Connection structure described in 1. 4. The joint body according to claim 2, wherein said joint body has a straight shape, an elbow shape, a T shape or a cross shape.
Connection structure described in 1. 5. The connection structure according to claim 1, wherein the joint body has a sleeve shape. 6. The connection structure according to claim 5, wherein the sleeve-shaped joint main body has an engagement portion of a polygonal hole at an end opposite to the insertion end. 7. The connection structure according to claim 5, wherein the sleeve-shaped joint main body has a screw portion at an end opposite to the insertion end. 8. The connection according to claim 5, wherein the sleeve-shaped joint body has a flange at an end opposite to the insertion end for coupling with another member. Construction. 9. The sleeve-shaped joint main body according to claim 2, wherein
The connection structure according to claim 5, wherein the connection structure is a reduced diameter joint having two different outer diameters. 10. The bracket according to claim 1, wherein the bracket is a plate which is inserted into a pair of passage-like grooves formed on both sides of the hollow bar and is fixed by screws to a pair of nuts which can be disposed. Item 2. The connection structure according to Item 1. 11. The apparatus according to claim 2, wherein the bracket is inserted into a pair of passage-like grooves formed on both sides of the hollow bar, and is fixed by screws to a pair of nuts that can be disposed. Connection structure described.