JP3031684U - Connection nipple - Google Patents

Abstract

(57) Abstract: The present invention relates to a connection nipple that connects and connects a plurality of air ducts such as flexible ducts and spiral ducts used for gas feeding, and provides a reliable one-touch air duct with a simple structure. An object of the present invention is to provide a connection nipple that can be mounted, has improved heat insulation, and can prevent dew condensation. SOLUTION: A connecting end portion 52 of a blower pipe is press-fitted between a plurality of locking members 21 fixed so as to project to the inside of a connection opening portion 12 of a connection nipple 1, which is called press fitting. The blower pipe can be firmly attached to the connection nipple 1 by one-touch operation to improve the mounting workability and prevent the blower pipe from falling off. Further, by forming an air layer between the connecting end portion 52 of the connected blower pipe and the inner circumference of the nipple body, the heat insulating property is improved and dew condensation is less likely to occur.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a connection nipple that connects and connects a plurality of air ducts such as flexible ducts and spiral ducts used for feeding gas.

[0002]

[Prior art]

 Conventionally, as a connection nipple used for connecting a plurality of air supply pipes for gas supply to form a single air supply pipe or connecting and suspending the air supply pipes, the one shown in FIG. 9 has been conventionally used. there were. FIG. 9 is a schematic configuration diagram of a conventional connection nipple.

In the conventional connecting nipple 100 shown in FIG. 9, connecting joints 101 are formed on both sides of a hollow cylindrical body, and a flexible duct 500, which is a blower pipe, is fitted around the outer periphery of the connecting joint 101. It is configured such that the outer periphery of the end of the fitted flexible duct 500 is tightened and fixed by the band 102. In addition to the tightening with the band 102, a method of fixing with an adhesive aluminum tape or fixing with a screw is used.

Further, there is another conventional connection nipple shown in FIG. FIG. 10 is an explanatory view of a connection state of another conventional connection nipple. In the figure, the conventional connection nipple 100 has a substantially cylindrical body having a connection opening portion 103 for connection with a flexible duct 500, which is a blower pipe, and a communication opening portion 202 communicating with the connection opening portion 103. An elastic packing 201 is provided in the central portion of the connection opening 103 so that a guide holding portion 203 is provided and an opening hole 204 smaller than the connection opening 103 is formed in the connection opening 103 or a peripheral edge thereof. Is fixed so that one end of the flexible duct 500 is inserted into the connection opening 103 of the connection nipple 100 through the opening hole 204 of the elastic packing 201. The flexible duct 500 connected to the connection nipple 100 has a flexible cylinder 501 and a connection end 502 which is fixedly connected to one end of the flexible cylinder 501 and inserted into the connection opening 103. An attachment / detachment holding portion 502a that contacts the guide holding portion 203 is formed on the outer periphery of 502.

In order to connect the flexible duct 500 to the connection nipple 100, when the connecting end 502 is pushed toward the elastic packing 201, the elastic packing 201 is bent in the insertion direction while being pressed by the connecting end 502. While the outer surface is held by the guide holding portion 203, the opening hole 204 thereof is elastically expanded and expanded in diameter so as to be in close contact with the outer peripheral surface of the connecting end portion 502 and maintain airtightness. Therefore, the flexible duct 500 can be efficiently connected to the connection opening 103 of the connection nipple 100 with one touch, and the airtightness can be reliably maintained.

[0006]

[Problems to be solved by the device]

 Since the conventional connecting nipple is configured as described above, when the flexible duct 500 is attached to the connecting joint 101, the outside of the flexible duct 500 is fixed by the band 102 or fixed by the adhesive aluminum tape. However, since a method such as screwing is used, it is necessary to perform complicated work in a narrow space under the ceiling of the building, and the flexible duct 500 can be connected smoothly and reliably. It had the problem of not having it.

Further, in the connection nipple 100 shown in FIG. 10, an elastic packing 201 is arranged on the inner periphery of the opening hole 204, and the elastic packing 201 holds the connection end portion 502 of the flexible duct 500 for connection. Therefore, when the flexible duct 500 is twisted and mounted in the elastic packing 201 during the connection work, there is a problem that the connection end 502 is detached from the elastic packing 201 very easily. . In addition to the twist of the flexible duct 500, when a pressing force is applied to the connecting end 502 in the vertical and horizontal directions, the outer peripheral surfaces of the elastic packing 201 and the connecting end 502 are separated from each other, and the tensile force is further increased. When applied, the elastic packing 201 has a weak locking force, so that the elastic packing 201 easily comes off from the connection opening 103.

The present invention has been made in order to solve the above-mentioned problems, and a connection nipple that has a simple structure and allows one-touch and reliable attachment of a blower pipe, improves heat insulation, and prevents the occurrence of dew condensation. The purpose is to provide.

[0009]

[Means for Solving the Problems]

 The connection nipple according to the present invention comprises a nipple body having a substantially cylindrical body having connection openings whose both ends are in a released state, and connecting ends of a ventilation pipe for ventilation are connected to the connection openings on both sides. In the connection nipple, one end side is fixed to a plurality of locations on both ends of the nipple body, and the other end side is provided with a plurality of locking members protruding inside the opening of the connection opening of the nipple body. The connection end portion of the blower pipe is press-fitted and connected between a plurality of locking members that respectively project into the connection opening portion. As described above, in the present invention, since the connecting end portion of the blower pipe is press-fitted and connected between the plurality of locking members fixed so as to project to the inside of the connection opening portion of the connection nipple, it is called press-fitting. The one-touch operation firmly attaches the blower pipe to the connection nipple to improve the installation workability and prevent the blower pipe from falling off. Further, by forming an air layer between the connection end of the connected blower pipe and the inner circumference of the nipple body, heat insulation is improved and dew condensation is less likely to occur.

In addition, the connection nipple according to the present invention is formed by bending a plate-like body having elasticity as a locking member, if necessary, while fixing one end to the nipple body and the other end. Is arranged so as to project inside the opening of the connection opening. As described above, according to the present invention, the locking member can be formed by a simple elastic plate, and the manufacturing cost can be reduced.

In addition, the connection nipple according to the present invention comprises, when necessary, a nipple body having fixed convex portions projecting from a plurality of locations on an outer periphery of a substantially cylindrical body, and the locking member has one end portion substantially U-shaped. It is bent in a letter shape, and the other end is bent and formed as a hook-like protruding piece, and an engaging hole for engaging with the fixed convex portion is formed in the U-shaped bent portion. The plurality of fixing projections of the nipple body are arranged to engage with the engaging holes so that the projecting pieces project toward the inside of the opening. As described above, according to the present invention, the locking member having the engaging holes is disposed by engaging the engaging holes with the fixing projections formed at a plurality of locations on the outer circumference of the nipple body. With the structure, the locking member and the nipple body can be easily assembled, which reduces the labor for manufacturing and greatly reduces the cost.

Further, the connection nipple according to the present invention is such that the outer periphery of the connection nipple is planted with bristles. As described above, in the present invention, by flocking the surface of the connection nipple, the heat insulating property is further improved, the thermal loss of the conditioned air is surely suppressed, and the dew condensation is less likely to occur, which adversely affects the surroundings. Absent.

Further, the connection nipple according to the present invention is one in which a suspension support member for a suspension support is attached to the outside of the nipple body and integrated as necessary. As described above, in the present invention, the connection nipple can be easily suspended by the integrated suspension support member, and the suspension and installation work of the blower pipe can be performed in a short time only by pressing and connecting the blower pipe. It can be done efficiently.

[0014]

[Embodiment of device]

 (First Embodiment of the Present Invention) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. 1 is an external perspective view of the connection nipple according to the present embodiment, FIG. 2 is a cross-sectional view of the connection nipple according to the present embodiment, and FIG. 3 is a manner of attaching a locking member in the connection nipple according to the present embodiment. 4 and 5 are sectional views showing a connection state between the connection nipple and the connection end portion of the flexible duct according to the present embodiment.

In each of the above figures, the connection nipple 1 according to the present embodiment includes a nipple body 11 that is a substantially cylindrical body made of metal, and a connection opening formed as two opening end portions of the nipple body 11 that face each other. The portion 12 and a plurality of locking members 21 fixed to the nipple body 11 so as to project to the inside of the opening at four places of the connection opening 12, and the plurality of fixed locking members 21. The connection end portion 52 of the flexible duct 50, which is a blower pipe, is press-fitted between them. On the outer peripheral side of the connection nipple 1, a flocked pile 3 which plays the role of a heat insulating material and prevents dew condensation is planted by electrostatic flocking.

The locking member 21 has a fixed base portion 21a formed by bending one end of an elastic metal plate-shaped member into a substantially U-shape and fixed to the outer periphery of the nipple body 11 by a fixing screw 21c. A connecting projection 21b formed by bending the other end of the plate-like member into a hook shape is arranged so as to project inside the opening of the connection opening 12. The locking member 21 can be formed by injection molding of a synthetic resin having an elastic force, in addition to bending and forming a metal plate having an elastic force.

The nipple body 11 has mounting recesses 11a formed at four locations on the outer circumference of the connection opening 12, and the mounting base 11a of the locking member 21 is housed and mounted in the mounting recesses 11a. . Since the fixed base portion 21a is housed and mounted in the mounting recessed portion 11a in this manner, the irregularities on the outer periphery of the nipple body 11 are small, and electrostatic flocking is facilitated.

On the other hand, the flexible duct 50 connected / extended by the connecting nipple 1 has a structure in which a connecting end portion 52 is attached to a flexible tubular body 51. The connecting end portion 52 is composed of an inner cylinder 53 and an outer cylinder 54. The outer cylinder 54 accommodates the inner cylinder 53 and holds the flexible cylinder 51 between the inner cylinder 53 and the outer cylinder 54 while sandwiching the flexible cylinder 51. The composition. The outer cylinder 54 has a connection portion 54a formed in a shape having a step portion 52a with which the connection projection portion 21b of the locking member 21 engages at one end side, and has an outer diameter equal to the flexible cylinder body 51 at the other end side. It is a configuration including an expansion step portion 54b formed with an inner diameter. Further, the inner cylinder 53 has a base portion 53a formed of a cylindrical body having an outer diameter equal to the inner diameter of the flexible cylinder body 51, and one end of the base portion 53a has a diameter larger than the inner diameter of the flexible cylinder body 51. The stopper portion 53c is formed, and the standing portion 53b is provided so as to project over the entire circumference of the other end portion of the base portion 53a.

To mount the flexible tubular body 51 on the connecting end portion 52, first, the flexible tubular body 51 is fitted deeper than the stopper portion 53c at the one end on the outer periphery of the base portion 53a of the inner barrel 53, and By tightening the outer periphery of the end of the fitted flexible tubular body 51 with a band-shaped insulator 55, the flexible tubular body 51 is fixed so as not to come off from the inner cylinder 53, and the flexible tubular body 51 and the flexible tubular body 51 and inner The airtightness between the cylinder 53 is maintained. In addition to the tightening by the insulator 55, it is also possible to adopt a method such as fixing with an adhesive aluminum tape or screw fixing with a screw. After fixing the flexible cylindrical body 51, the rising portion 53b of the inner cylinder 53 is adhered or riveted to the expansion step portion 54b of the outer cylinder 54 to form the connecting end portion 52.

Next, the operation of connecting the flexible duct to the connecting nipple based on the above configuration will be described. First, with the packing 56 attached to the pressing step 52b of the connection end 52 of the flexible duct 50, the connection end 52 of the flexible duct 50 is fitted and locked in the connection opening 12 of the connection nipple 1. That is, the connection end portion 52 of the flexible duct 50 is inserted through the connection opening 12 of the connection nipple 1 in the direction of arrow A shown in FIGS. 1 and 2. By pressing and inserting the connecting end portion 52, the locking member 21 protruding inside the opening of the connecting opening portion 12 is expanded, and the connecting protrusion 21 b of the locking member 21 engages with the step portion 52 a of the connecting end portion 52. Accordingly, the packing 56 can be fixed and locked between the pressing step portion 52b of the connecting end portion 52 and the nipple body 11 on the outer periphery of the connecting opening portion 12 while being pressed, and can be connected in a sealed state. Furthermore, since the connection ends 52 of the flexible ducts inserted from both sides of the nipple body 11 are in close contact with each other inside the nipple body 11 to maintain airtightness, an air layer 4 is formed between the connection end 52 and the nipple body 11. The heat insulation is greatly improved.

As described above, the connection nipple according to the present embodiment can be connected only by a one-touch operation of pressing the connection end portion 52 of the flexible duct 50 against the connection opening portion 12, and has a heat insulating property. Highly, heat does not flow in and out of the connection part and dew condensation does not occur, the surrounding environment is not adversely affected, and unnecessary energy consumption in air conditioning is reduced.

Second Embodiment of the Present Invention A second embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory view of a connection state in the connection nipple according to the present embodiment. In FIG. 5, the connection nipple 1 according to the present embodiment has a nipple body 11 in which a connection opening 12 is provided at an opening end of a substantially cylindrical body, and an opening end of the nipple body 11 has one end engaged. And a locking member 22 that is formed by bending the other end into a hook shape with respect to the one end, and is attached to each of a plurality of positions so as to project to the inside of the connection opening 12. This is a configuration in which the connecting end portion 52 of the flexible duct 50 is press-fitted between the plurality of mounted locking members 22.

The locking member 22 includes a fixed base portion 22a whose one end is bent and formed into a substantially U shape, and a connecting projection 22b which is formed by bending the other end into a hook shape. An engaging hole 22c is formed in a U-shaped bent portion of the fixed base portion 22a. The locking member 22 has a structure in which the connecting projection 22b projects inside the nipple body 11 when it is mounted on the nipple body 11.

The nipple body 11 has a structure in which fixed protrusions 11c that fit into the engagement holes 22c of the locking member 22 are formed at a plurality of locations on the outer circumference. The locking member 22 is pressed and attached to the nipple body 11 in the direction of arrow B shown in FIG. 5, and the engaging hole 22c of the locking member 22 is engaged with the fixed convex portion 11c to lock the locking member 22. It is attached to the nipple body 11.

Next, the operation of connecting the flexible duct to the connecting nipple based on the above configuration will be described. The connecting end portion 52 of the flexible duct 50 is pressed and inserted in the direction of arrow C shown in FIG. 5 between the locking members 22 arranged in the connecting opening portion 12 of the nipple body 11. By pressing and inserting the connecting end portion 52, the connecting projection portion 22b of the locking member 22 that protrudes inward of the nipple body 11 is expanded to the outside, and the connecting projection portion 22b of the locking member 22 becomes a step portion of the connecting end portion 52. It is possible to engage and fix the gear 52a. A packing 56 is attached to the pressing step portion 52b of the connecting end portion 52, and the packing 56 is provided between the pressing step portion 52b of the connecting end portion 52 of the flexible duct 50 and the opening end surface of the nipple body 11. Thus, the flexible duct 50 can be mounted in the connection opening 12 of the nipple body 11 in a sealed state.

Third Embodiment of the Present Invention A third embodiment of the present invention will be described with reference to FIG. FIG. 6 shows a connection state explanatory view of the connection nipple according to the present embodiment. In FIG. 6, the connection nipple 1 according to the present embodiment is formed of a cylindrical nipple body 11 as in the first embodiment, and four nipples are provided at the end of the connection opening 12 in the nipple body 11. The locking member 21 is fixed. The flexible duct 50 mounted on the nipple body 10 has a structure in which a fixing hole 52c matching the position and shape of the locking member 21 of the connecting opening 12 is formed in the connecting end 52.

When the connecting end portion 52 of the flexible duct 50 is press-fitted in the direction of the arrow D in the drawing, the connecting end portion 52 presses and expands the four locking members 21 projecting inside the connecting opening portion 12 by the press-fitting. While being inserted, the respective locking members 21 engage with the fixing holes 52c formed at four locations on the outer circumference of the connecting end portion 52, whereby the mounting of the flexible duct 50 on the nipple body 11 is completed. In this way, the attachment operation can be executed by the one-touch operation of pressing the connection end portion 52 of the flexible duct 50 against the connection opening portion 12 of the nipple body 11.

Although the connection nipple 1 according to the above-described embodiment has a configuration in which four locking members 21 are fixedly provided in FIG. 6, the number of the locking members is, for example, six. Alternatively, a plurality of fixing holes 52c may be fixed, and the fixing holes 52c corresponding to the plurality of fixing holes 52c may be formed in the connecting end portion 52 of the flexible duct 50. Further, in FIG. 6, four locking members 21 are fixed to the connection opening 12, and the locking members 21 are engaged and fixed in the fixing holes 52c formed in the connecting end 52 of the flexible duct 50. However, as shown in FIG. 4, a step portion (corresponding to 52a) is formed at the connecting end portion 52 of the flexible duct 50, and the locking member 21 is engaged and fixed to this step portion. You can also do it. Further, similarly to the connection nipple 1 described in FIGS. 2 and 5, packing (corresponding to 56) may be arranged at each connection portion.

As the connecting end portion 52 of the flexible duct 50 press-fitted into the connecting nipple according to the first and second embodiments, a step portion 52a that engages with the locking members 21 and 22 is formed. In addition to the stepped portion 2a, as shown in FIG. 7, a groove portion communicating with the stepped portion 52a at the tip of the connecting end portion 52 according to the arrangement interval of the engaging members 21, 22 to the nipple body 11 is provided. 52d or notches 52e are provided, and when connecting the flexible duct 50 and the connecting nipple 1, press fit connection so that these grooves 52d or notches 52e do not contact the positions of the locking members 21 and 22 for connection. When removing the flexible duct 50 from the nipple 1, the connection end 52 is rotated to align the groove 52d or the notch 52e with the position of the locking members 21 and 22, and the engaged state is released. Alternatively, the connecting end 52 can be pulled out as it is, and in this case, it is not necessary to pull out the flexible duct 50 from the connecting nipple 1 with a strong force, which saves labor. Work efficiency is greatly improved.

Further, the connection nipples according to the first, second and third embodiments are not only for connecting air ducts such as flexible ducts but also for suspensions suspended from the ceiling structure. It is also possible to suspend the connection nipple 1 by using a suspension support member 60 such as a suspension belt on the bolt, and connect the ventilation pipe to the suspension nipple 1 to construct the ventilation pipe. In this case, as shown in FIG. 8, the connection nipple 1 and the suspension support member 60 can be integrated, and the connection nipple 1 having a substantially cylindrical body can be freely rotated with respect to the suspension support member 60. It is also possible to adopt a configuration in which the twist of the blower pipe to be connected can be eliminated.

Further, the connection nipple according to each of the above-described embodiments has a structure in which the hair is planted on the entire outer peripheral side, but it is also possible to construct a structure in which no hair is planted at all. In that case, a heat insulating tape may be wound around the outer periphery of the nipple body 11 so as to function as a heat insulating material and a protective material.

[0032]

[Effect of device]

 As described above, in the present invention, the connecting end of the blower pipe is press-fitted and connected between the plurality of locking members fixed so as to project to the inside of the connection opening of the connecting nipple. The one-touch operation firmly attaches the blower tube to the connection nipple to improve the installation workability and prevent the blower tube from falling off. Further, by forming an air layer between the connection end of the connected blower pipe and the inner circumference of the nipple body, the heat insulating property is improved and dew condensation is less likely to occur. Further, in the present invention, the locking member can be formed by a simple elastic plate, which has an effect of reducing the manufacturing cost. Further, in the present invention, since the locking member having the engaging holes formed therein is disposed by engaging the engaging holes with the fixing projections formed at a plurality of locations on the outer periphery of the nipple body, it is simple. With the configuration, the locking member and the nipple body can be easily assembled, which reduces the labor for manufacturing and has the effect of significantly reducing the cost. Further, in the present invention, the heat insulation is further improved by flocking the surface of the connection nipple, the thermal loss of the conditioned air is surely suppressed, and dew condensation is less likely to occur, which does not adversely affect the surroundings. Has the effect. Further, in the present invention, the connection nipple can be easily suspended by the integrated suspension support member, and by simply press-fitting and connecting the blower pipe, the suspension and installation work of the blower pipe can be performed efficiently in a short time. It has the effect that it can be done.

[Brief description of drawings]

FIG. 1 is an external perspective view of a connection nipple according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the connection nipple according to the first embodiment of the present invention.

FIG. 3A is a perspective view showing a state where the locking member is attached to the connection nipple according to the first embodiment of the present invention.
FIG. 3B is a front view of the engaging member in the connection nipple according to the first embodiment of the present invention in an attached state.

FIG. 4 is a cross-sectional view showing a connection state between the connection nipple and the contact side end of the flexible duct according to the first embodiment of the present invention.

FIG. 5 is a connection state explanatory diagram of a connection nipple according to a second embodiment of the present invention.

FIG. 6 is a connection state explanatory diagram of a connection nipple according to a third embodiment of the present invention.

FIG. 7A is an explanatory view of the connecting operation between the connecting nipple and the contact side end of the flexible duct according to another embodiment of the present invention. (B) is a connection operation explanatory view of the connection nipple and the contact side end of the flexible duct according to another embodiment of the present invention.

FIG. 8A is an explanatory view of a suspended state of a connection nipple according to another embodiment of the present invention. (B) is a suspension pendant explanatory view of a connection nipple according to another embodiment of the present invention.

FIG. 9A is an external perspective view of a conventional connection nipple. (B) is a connection state sectional view of a conventional connection nipple.

FIG. 10 is an explanatory view of a connection state in another conventional connection nipple.

[Explanation of symbols]

 1, 100 Connection nipple 3 Flock pile 4 Air layer 11 Nipple body 11a Mounting recess 11b Fixed convex portion 12 Connection opening 21, 22 Locking material 21a, 22a Fixed base 21b, 22b Connection protrusion 21c Fixed screw 22c Engagement hole 50 , 500 flexible duct 51, 501 flexible tube 52, 502 connection end 52a step 52b pressing step 52c fixing hole 52d groove 52e notch 53 inner cylinder 53a base 53b upright 53c stopper 54 outer cylinder 54a connection Part 54b Expanding step part 55 Insulator 56 Packing 60 Suspension supporting member 101 Connection joint 102 Band 103 Connection opening 201 Elastic packing 202 Communication opening 203 Guide holding part 204 Opening hole 502a Attachment / detachment holding part

Claims (5)

[Scope of utility model registration request] 1. A connection nipple comprising a substantially cylindrical nipple main body having connection openings whose both ends are in a released state, and connecting the connection ends of a ventilation pipe for ventilation to the connection openings on both sides, One end side is fixed to a plurality of positions on both ends of the nipple body, and the other end side is provided with a plurality of locking members protruding inside the opening of the connection opening portion of the nipple body, each of which is provided in the connection opening portion of the nipple body. A connecting nipple, wherein the connecting end portion of the blower pipe is press-fitted between a plurality of projecting locking members. 2. The connection nipple according to claim 1, wherein the locking member is formed by bending an elastic plate-like body, and has one end fixed to the nipple body,
A connection nipple, wherein the other end is arranged so as to project inside the opening of the connection opening. 3. The connection nipple according to claim 1 or 2, wherein the nipple main body is provided with a plurality of fixing protrusions at a plurality of outer peripheral portions of a substantially cylindrical body, and the locking member has one end portion. It is bent in a substantially U-shape, and the other end is bent and formed as a hook-shaped protruding piece, and an engaging hole for engaging with the fixed convex portion is formed in the U-shaped bent portion. A connection nipple, wherein the connection nipple is provided by engaging the engagement holes with a plurality of fixing projections of the nipple body so as to project the projection piece toward the inside of the opening. 4. The connection nipple according to claim 1, wherein bristles are applied to the outer circumference of the connection nipple. 5. The connection nipple according to any one of claims 1 to 4, wherein a suspension support member for a suspension support is attached to and integrated with the outside of the nipple body.