JP2010242880A - Spherical universal joint and connecting method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spherical universal joint allowing direction adjustment with respect to a connection direction by a comparatively smooth configuration not having any small uneven obstacles in an inner face. <P>SOLUTION: In a pair of connection port members 1, 2 comprised by connectively providing substantially semi-circular spherical connection port parts 1-2, 2-2 to connection port parts 1-1, 1-2 comprising straight pipes, and slidably fitting and connecting the spherical connection port parts 1-2, 2-2 to each other, a pipe axis Z of the connection port parts 1-1, 2-1 is positioned in a position away from a spherical center point P of the spherical connection port parts 1-2, 2-2, and on a plane comprised by the spherical center point P and the pipe axis Z, the connection port parts 1-1, 2-1 are formed so as to freely slant around an axis of a slanted axis Y passing through the spherical center point P and orthogonal to the plane, and rotatably around the spherical center point P as a rotational axis. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a spherical universal joint that can be freely oriented in any piping direction, and in particular, connection between a connection exhaust port (internal exhaust port) of a ventilator and an external exhaust port attached to a wall of a building, and the like. The present invention relates to a spherical universal joint having effective flexibility and a connection method using this spherical universal joint.

Ventilators for indoor ventilation are known to have an opening on the wall of the building, and a wall-mounted type that can be directly attached to the opening, or an installation type that is installed inside the ceiling or wall. . In recent years, installation types have become mainstream. In this installation type ventilator, connection to an external exhaust port attached to a wall of a building is performed using an elbow pipe or a bellows pipe formed integrally.
In other words, depending on the opening direction of the connection exhaust port on the installation type ventilator side, due to the relationship with the mounting position of the external exhaust port on the wall, misalignment occurs in the connection direction between the connection exhaust port and the external exhaust port, May not match. In this case, either the elbow pipe or the bellows pipe, or a combination of the elbow pipe and the bellows pipe is used to connect the connection exhaust port and the external exhaust port.

By the way, the elbow pipe is effective as a pipe joint for indoor ventilation because there is no unevenness on the inner surface that obstructs the flow of air, but because it is a pipe joint having a fixed bending angle such as 90 °, Depending on the misalignment of the direction (center misalignment angle) and the like, not only the work becomes very difficult, but the elbow pipe alone may not be able to cope with it. In this case, it is often performed by using a combination with a bellows tube having flexibility in a direction or a single bellows tube.
In this way, the bellows pipe can be adjusted smoothly and smoothly with respect to misalignment in the connection direction between the connection exhaust port and the external exhaust port. I can say that. However, the bellows pipe has a problem that a smooth circulation of room air cannot be expected, such as a high ventilation resistance, because fine irregularities exist on the inner surface of the pipe.
In particular, when bellows pipes are used for the external piping of range hoods that exhaust contaminated air generated during cooking to the outdoors, the fat and oil contained in the contaminated air is projected to uneven projections. Repeating this collision makes it easier for oil and fat to accumulate in the pipe, which is undesirable in terms of fire safety.

Therefore, in order to solve such a problem, the inner peripheral surface of the pipe does not have irregularities existing in the pipe direction at a fine pitch like a bellows pipe, and the flexibility to adjust the misalignment with respect to the connection direction is provided. Proposed joints for ventilation (see, for example, Patent Document 1)
The vent joint includes a connection port portion connected to a pipe end portion of a connection pipe by band fastening or the like, end members on both sides having semicircular ridges connected to the connection port portion, and end members on both sides The intermediate member is formed by connecting two-way semicircular ridges in the respective connecting directions that are fitted and connected to the semicircular ridges of the both end members.
As a result, the semicircular ridges of the end members on both sides and the semicircular ridges of the intermediate member are pivotally connected so that the connection ports of the end members on both sides are coaxial with the connection direction to the connection pipe. It has flexibility to adjust the alignment on the core, and the entire length can be changed depending on the number of intermediate members connected between the end members on both sides.

Japanese Utility Model Publication No. 8-525

By the way, as shown in FIG. 1 and FIG. 2 after correction, for example, the conventional technology described in Patent Document 1 is an end formed so as to overlap in the same flange part (end face) form in relation to inside and outside. This is a connecting structure in which the female semicircular ridges of the members are fitted and connected so as to cover the male semicircular ridges of the intermediate member.
For this reason, it is necessary to load a sealing material such as an O-ring for sealing between the male and female collars between the mating overlapping portions of both male and female semicircular baskets. It was time consuming.
For example, at the installation site of a range hood, a fitting connection using a plurality of intermediate members performed according to the connection length of the connection exhaust port of the hood part attached to the indoor wall surface and the external exhaust port attached to the wall part There were problems in handling such as troublesome and time-consuming work.

  In the prior art, in addition to the end members on both sides, two different types of female intermediate members and male intermediate members must be manufactured on the manufacturing surface. Further, since a sealing material such as an O-ring that fills the space between the mating overlapped parts is required as an essential part, the cost is increased due to an increase in material costs and processing costs.

  Therefore, the present invention has been developed to solve the above-mentioned problems, and is a spherical type that can freely adjust the direction in the connection direction with a relatively smooth structure that does not have fine irregularities on the inner surface. Providing joints, and combining two pairs of spherical universal joints, or combining two pairs of spherical joints and straight pipes, widens the range of directional adjustment and matches the pipe length (distance). It is to provide a connection method that enables connection.

In order to solve the above problems, the spherical universal joint of the present invention is a spherical universal joint having flexibility,
A pair of connections formed with a connection port portion formed of a straight pipe and a spherical connection port portion that is connected in a substantially hemispherical shape from one end of the connection port portion and is slidably fitted and connected to each other. The spherical connection port portion of one connection port member is slidably connected to the spherical connection port portion of the other connection port member by internal fitting. It is formed as follows.

Here, the pair of connection port members are arranged so that the tube shaft of the connection port portion is located at a position deviated from the spherical center point of the spherical connection port portion formed in a substantially hemispherical shape, and the spherical connection port portion The spherical circumference is connected to the connection port portion, and the connection port portions are tiltable on a plane formed by the tube axis and the spherical center point, and the spherical center point is rotated. It is preferable to adopt a configuration in which the shaft is formed so as to be rotatable.
Further, of the pair of connection port members, the internal fitting opening of the spherical connection port portion of one connection port member has a straight line passing through the spherical center point and the tube axis, and passes through the spherical center point and the plane. The spherical circumference of the spherical connecting port on the tube axis side from one end side of the straight line that intersects the spherical circumference of the spherical connecting port on the spherical center point side with respect to the plane formed by the intersecting straight line orthogonal to The outer connecting opening of the spherical connecting port of the other connecting port member passes through the spherical center point and the tube axis. It is preferable to adopt a configuration formed in an opening shape substantially along a plane formed by a straight line and the intersecting straight line.

According to the spherical universal joint having such a configuration, the spherical connection port portions of the pair of connection port members are fitted and connected in an internal / external relationship, thereby tilting the connection port side of the pair of connection port members, and It is possible to configure a spherical universal joint having flexibility such that the spherical center point can be rotated about the rotation axis.
That is, by tilting the connection port side of the pair of connection port members relative to each other, the inner surface of the pipe is relatively smooth, and the connection port side of the pair of connection port members is rotated relative to each other. An arbitrary spherical universal joint having a relatively smooth inner surface of the tube, such as a substantially twisted shape or a substantially straight tube shape, can be used.
Thereby, the adjustment operation | work with respect to the core shift | offset | difference of a piping direction can be performed smoothly. For example, elbow form, abbreviation from connection exhaust port of ventilator such as range hood that sucks and captures polluted air generated during cooking to external exhaust port installed on the wall of building etc. to exhaust polluted air outdoors A straight pipe form, a twisted form, and the like can be used.

Further, according to the spherical universal joint having the above-described configuration, a configuration is adopted in which the tube axis of the connection port portion is located at a position deviated from the spherical center point of the spherical connection port portions that are slidably fitted and connected to each other. By doing so, the size (diameter) of the spherical connection port portion slidably fitted and connected to each other is reduced in a state where a large inclination angle (tilt angle) between the pair of connection port members is ensured. be able to.
This makes it possible, for example, to connect a connection exhaust port of a ventilator such as a range hood that sucks and captures contaminated air generated during cooking and an external exhaust port that is installed on the wall of the building and exhausts the contaminated air outdoors. Even in a narrow space that is limited, for example, it is possible to connect the connection exhaust port to the external exhaust port without obstructing (interfering with) the spherical connection port portion.

Further, in the spherical universal joint of the present invention, the spherical connecting port portion of the one connection port member is provided with a regulating portion for regulating a tilting range between the pair of connection port members. To do.
Here, the restricting portion includes an engaging convex portion provided in an inward projecting shape in the vicinity of a circumferential edge of the external fitting opening portion of the spherical connection port portion of the other connection port member, and the one connection port member. And the engaging projection is slidably engaged with the engaging projection so that both ends of the tilting shaft intersect with each other. Formed at two circumferential edges of the outer fitting opening in the spherical circumferential portion and at least one circumferential edge of the outer fitting opening in the spherical circumferential portion where both ends of the straight line intersect, A groove is communicated with the rotation guide groove and a rotation guide groove provided in a ring shape along the spherical circumference of the internal fitting opening on the plane formed by the straight line and the tilt axis. The connection port and the ball on the one end side of the straight line Tilt guide provided so as to reach the vicinity of the connecting portion with the connecting port and / or to reach the vicinity of the circumferential edge of the inner fitting opening of the spherical connecting port on the other end side of the straight line. It is preferable to adopt a configuration formed from the groove.

Further, in the spherical universal joint of the present invention, the spherical connecting port portion of the one connection port member is provided with a regulating portion for regulating a tilting range between the pair of connection port members. To do.
Here, the restricting portion is configured so that, on the plane formed by the straight line and the intersecting straight line, the spherical surface has a circumferential range intersecting with both ends of the intersecting straight line from the other side of the spherical circumference where the other end of the straight line intersects. It comprises a rib rib provided along the circumference, and the external fitting opening of the spherical connecting port portion of the other connection port member is formed in the straight line from the rib rib and both open ends of the rib rib. A configuration is adopted in which the pair of connection port members are configured to be inclined with respect to each other within a range where the connection port portion and the spherical connection port portion on the one side abut each other in the vicinity of the connection portion. Is preferable.
Further, the restricting portion is arranged on the spherical circumference in a range where the other end side of the straight line intersects with both ends of the intersecting straight line on the plane formed by the straight line and the intersecting straight line. A first step portion provided along the first step portion, and the spherical circumference portion intersecting with both ends of the intersecting straight line provided continuously to the first step portion, the one side of the straight line intersects one side of the spherical circle. A second step portion provided along the spherical circumference in a range reaching the vicinity of the connecting portion between the connection port portion and the spherical connection port portion, and the spherical connection port portion of the other connection port member Adopting a configuration in which the outer fitting opening is formed so that the pair of connection port members can be tilted with each other in a range in which the first opening and the second step are in contact with each other. Is suitable.

Thus, according to the spherical universal joint provided with the restricting portion, as described above, when the connecting port portions of the pair of connecting port members are tilted with respect to each other, the tilting range is the other connecting port. It is regulated by a regulating part provided on the spherical coupling port part side of one of the connection port members or the spherical coupling port part of the pair of connection port members. .
For example, the first step portion provided on the spherical peripheral surface of the spherical connection port portion of one connection port member that is slidably connected by an internal fit to the spherical connection port portion of the other connection port member The pair of connection port members are inclined to each other within the tilt range where the edge of the fitting opening of the spherical connection port of the other connection port member comes into contact with the second stepped portion. I have to.
Thus, for example, when the connection port side of the pair of connection port members is tilted relative to each other in an elbow shape of 60 ° angle to 90 ° angle, a gap is formed between the fitting opening portions of the spherical connection port portion. It is possible to reliably prevent the occurrence of such as.

  In addition, the connection method using the spherical universal joint of the present invention is performed by preparing two sets of spherical universal joints composed of the pair of connection port members and using the two sets of spherical universal joints. It is characterized by carrying out through a straight pipe between the two sets of spherical type universal joints.

  According to such a connection method, for example, an outside that is installed in a connection exhaust port of a ventilator such as a range hood that sucks and captures contaminated air generated during cooking and a wall of a building and exhausts the contaminated air to the outside. When connecting the exhaust port to the pipe, connection according to the piping dimension (distance) between the two exhaust ports becomes possible.

According to the spherical universal joint of the present invention, the pipe inner surface has no irregularities, and the inner surface of the pipe has a smooth elbow shape, a substantially straight tube shape, and a twisted shape. It can be arbitrarily changed by the tilting and rotation of the connection ports around the spherical center point of the spherical connection port.
Thereby, the direction adjustment with respect to the core shift | offset | difference of piping direction is attained. For example, it is effective for connecting the connection exhaust port of a ventilator such as a range hood that exhausts polluted air generated during cooking to the outside and the external exhaust port mounted on the wall of the building. It is possible to provide a spherical type universal joint having an effective flexibility even in the above.

Further, according to the spherical type universal joint, the tube shaft of the connection port portion is positioned away from the spherical center point of the spherical connection port portion, and the spherical circumference of the spherical connection port portion is connected to the connection port portion. By adopting the above, it is possible to reduce the size (outer diameter) of the spherical connection port portion while ensuring a large tilt angle (tilt angle) of the pair of connection port members.
This makes it possible, for example, to connect a connection exhaust port of a ventilator such as a range hood that sucks and captures contaminated air generated during cooking and an external exhaust port that is installed on the wall of the building and exhausts the contaminated air outdoors. Even in a limited narrow space such as when performing the operation, the pipe connection between the connection exhaust port and the external exhaust port is possible without obstructing the spherical connection port portion.

Further, according to the connection method using the spherical universal joint of the present invention, pipe connection is made using the two prepared spherical universal joints, or the two spherical universal joints and a straight pipe of any length. By performing the above-described effects such as enabling the adjustment of the direction of the pipe direction with respect to the core misalignment, it is possible to further secure an arbitrary length according to the required pipe dimension (distance). .
For example, when connecting the connection exhaust port of a ventilator such as a range hood and the external exhaust port that exhausts contaminated air to the outside, connect both exhaust ports to the required length according to the piping dimensions between the exhaust ports. It becomes possible to connect. That is, the degree of freedom of the pipe length according to various pipe dimensions at the installation site of the ventilation device or the like can be freely set.

It is a longitudinal cross-sectional view which shows the elbow form of the spherical type universal joint of this invention which concerns on 1st Embodiment. It is a perspective view when the same spherical type universal joint is seen from the other connection port member side. One connection port member which comprises the same spherical type universal joint is shown, (a) is a longitudinal cross-sectional view, (b) is the top view. The connection port member side is shown, (a) is a perspective view when viewed from the connection port portion side, and (b) is a perspective view when viewed from the opposite side (back side). The other connection port member side is shown, a) is a longitudinal sectional view, and (b) is a plan view thereof. It is a perspective view when the same connection port member is seen from the external fitting opening part side. Side view when each elbow form of the spherical universal joint is viewed from the cylinder direction when the connection port portion of the pair of connection port members is tilted with the intersecting straight line passing through the spherical center point of the spherical connection port portion as the tilt axis. Each figure is shown, (a) shows a state when tilted to 60 °, (b) shows a state when tilted to 75 °, and (c) shows a state when tilted to 90 °. Indicates. Each form of the spherical universal joint when the connection port portions of the pair of connection port members are rotated from the state shown in FIG. 7A about the spherical center point of the spherical connection port portion as the rotation axis. A side view when viewed from the cylinder direction and a plan view when viewed from the connection port side of the other connection port member are respectively shown, (a) shows a state when rotated by 30 °, and (b) ) Shows the state when rotated by 60 °, and (c) shows the state when rotated by 90 °. FIG. 7A is a side view of each form when the connection port portions of the pair of connection port members are rotated from the state shown in FIG. 7A from the cylindrical direction and the connection port side of the other connection port member. (A) shows the state when rotated by 120 °, (b) shows the state when rotated by 150 °, and (c) shows the state when rotated from 150 °, respectively. The state when rotated 180 ° is shown. An example of the piping form by the connection method of this invention using two sets of spherical type universal joints is shown, (a) is a top view when the ventilation apparatus is seen from the top, (b) is the ventilation apparatus It is a front view when seeing from the front. An example of the connection method of this invention by the combination of two spherical type universal joints and a straight pipe is shown, (a) is a top view when a ventilation apparatus is seen from the top, (b) is the ventilation. It is a front view when an apparatus is seen from the front. It is a longitudinal cross-sectional view which shows the elbow form of the spherical type universal joint of this invention which concerns on 2nd Embodiment. It is a perspective view when the same spherical type universal joint is seen from the other connection port member side. One connection port member which comprises the same spherical type universal joint is shown, (a) is a longitudinal cross-sectional view, (b) is the top view. The same connection port member is shown, (a) is a perspective view when viewed from the inner fitting opening side, and (b) is a perspective view when viewed from the opposite side (back side). It is a longitudinal cross-sectional view which shows the other connection port member which comprises the same spherical type universal joint. It is a perspective view when the other connection port member is seen from the external fitting opening side. It is a longitudinal cross-sectional view which shows the elbow form of the spherical type universal joint of this invention which concerns on 3rd Embodiment. It is a perspective view when the same spherical type universal joint is seen from the other connection port member side. It is a longitudinal cross-sectional view which shows one connection port member which comprises the same spherical type universal joint. It is a perspective view when the same one connection port member is seen from an internal fitting opening part side.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a longitudinal sectional view showing an elbow form of the spherical universal joint of the present invention according to the first embodiment, and FIG. 2 is a perspective view showing the spherical universal joint.

<< Configuration of spherical universal joint >>
A spherical universal joint (hereinafter referred to as “universal joint”) A is configured by slidingly fitting and connecting a pair of connection port members 1 and 2 as shown in FIGS. 1 and 2. .
For example, as shown in FIGS. 10 and 11 to be described later, the universal joint A includes a connection exhaust port 5 provided in a ventilator C such as a range hood that sucks and captures contaminated air generated during cooking and a building. It is used as a joint for piping for connecting to an external exhaust port 6 that is installed on the wall K-1 and exhausts contaminated air to the outside.

≪Configuration of a pair of connection port members≫
3 is a longitudinal sectional view and a plan view showing one connection port member side, FIG. 4 is a perspective view showing the same connection port member, and FIG. 5 shows the other connection port member side. FIG. 6 is a perspective view showing the other connection port member. Here, description will be made with reference to FIG. 1 as appropriate.

A pair of connection port members (hereinafter, one is referred to as “connection port A member” and the other is referred to as “connection port B member”) 1 and 2 are each formed of a nonflammable material. For example, it is formed using a steel plate made of stainless steel or zinc having a thickness of 0.5 mm or more.
As shown in FIGS. 3A and 5A, the connection port A member 1 and the connection port B member 2 are connected to the connection port parts 1-1, 2-1 and the connection port part 1, respectively. -1 and 2-1 are formed with spherical connection ports 1-2 and 2-2 connected to one end.

  The connection port portions 1-1 and 2-1 are formed by, for example, the connection exhaust port 5 and the external exhaust port 6 of the blower B, and straight pipes having a diameter that are fitted and connected to each other in an external and internal relationship. .

  The spherical connection ports 1-2 and 2-2 have a substantially hemispherical shape having a diameter larger than the diameter of the connection ports 1-1 and 2-1, and are slidably fitted and connected to each other in relation to the inside and outside. Each is formed to be. In the present embodiment, as shown in FIG. 1, the spherical connecting port 1-2 side is slidably fitted and connected to the spherical connecting port 2-2 side by internal fitting.

And among spherical connection port parts 1-2 and 2-2, as shown in FIG. 3, the internal fitting opening part 3 by the side of the spherical connection port part 1-2 makes the connection port part 1-1 downward vertically. In the state of being directed, it is formed in an opening shape directed obliquely upward.
More specifically, it passes through a straight line X passing through the spherical center point P of the spherical connection port 1-2 and the tube axis Z of the connection port 1-1 at a position deviating from the spherical center point P, and through the spherical center point P. A spherical connecting port portion where one end side of the straight line X intersects a plane formed by a crossing straight line (hereinafter referred to as “tilting axis”) Y orthogonal to the plane formed by the spherical center point P and the tube axis Z. From one side of the spherical circumference 1-2 (left side in FIG. 3) to the other side (right side in FIG. 3) of the spherical circumference of the spherical connecting port 1-2 where the other end of the straight line X intersects. It is formed in an opening shape that is gradually separated.
On the other hand, the external fitting opening 4 on the spherical connecting port 2-2 side is formed in an opening shape substantially along a plane formed by the straight line X and the tilt axis Y, as shown in FIG.

Incidentally, in this embodiment, in the case of the connection port A member 1, the straight line X passing through the spherical center point P of the spherical connection port portion 1-2 and the tube axis Z of the connection port portion 1-1 is as shown in FIG. In addition, the angle θ1 formed by the intersecting line W that passes through the spherical center point P and intersects at right angles to the tube axis Z is 26 °. In this case, the inner diameter φ of the connection port 1-1 is 150 mm, and the radius SR from the spherical center point P of the spherical connection port 1-2 is 99 mm.
In the case of the connection port B member 2, the straight line X passing through the spherical center point P of the spherical connection port portion 2-2 and the tube axis Z of the connection port portion 2-1 is a spherical center point as shown in FIG. An angle θ2 formed by an intersecting line W passing through P and perpendicular to the tube axis Z is set to 34 °. In this case, the inner diameter φ of the connection port portion 2-1 is 145 mm, and the radius SR from the spherical center point P of the spherical connection port portion 2-2 is 100 mm.

As shown in FIGS. 3 and 5, the tube axis Z of the connection port portions 1-1 and 2-1 is positioned away from the spherical center point P of the spherical connection port portions 1-2 and 2-2. The spherical circumferences of the spherical connection ports 1-2 and 2-2 are connected to the connection ports 1-1 and 2-1.
More specifically, in the connection port A member 1 shown in FIG. 3, on the straight line X, the tube axis Z of the connection port portion 1-1 is connected to the other end of the straight line X from the spherical center point P of the spherical connection port portion 1-2. The spherical connection port 1-2 is welded to the connection port 1-1 or other fixing means as a position deviated from the other side of the spherical circumference of the spherical connection port 1-2 where the sides intersect (the right side in FIG. 3). Adopted a structure that is connected in series.
As described above, when the radius SR from the spherical center point P of the spherical connecting port 1-2 is 99 mm and the inner diameter φ of the connecting port 1-1 is 150 mm, the tube of the connecting port 1-1 By setting the axis Z at a position 23.5 mm away from the spherical center point of the spherical connecting port 1-2, as shown in FIG. 3, the pipe peripheral surface of the connecting port 1-1 is a spherical connecting port. It can be flush with the spherical circumference on the other side of 1-2. In this case, the thickness of the spherical connection port 1-2 is 0.5 mm.

On the other hand, in the connection port B member 2 shown in FIG. 5, on the straight line X, the tube axis Z of the connection port part 2-1 is a spherical shape where the other end side of the straight line X intersects the spherical center point of the spherical connection port part 2-2. The spherical connection port 2-2 is connected to the connection port 2-1 by welding or other fixing means as a position deviating from the other side of the spherical surface of the connection port 2-2 (the right side in FIG. 5). Adopted the structure.
As described above, when the radius SR from the spherical center point P of the spherical connecting port 2-2 is 100 mm and the inner diameter φ of the connecting port 2-1 is 145 mm, the pipe of the connecting port 2-1 By setting the axis Z to a position 27 mm away from the spherical center point P of the spherical connecting port portion 2-2, as shown in FIG. 5, the pipe peripheral surface of the connecting port portion 2-1 is the spherical connecting port portion 2. -2 can be flush with the spherical circumference on the other side. In this case, the thickness of the spherical connection port portion 2-2 is 0.5 mm.

Thus, the spherical coupling port 1-, where the other end of the straight line X intersects the tube axis Z of the coupling port 1-1, 2-1 with the spherical center point P of the spherical coupling port 1-2, 2-2. 2, the diameters (outer diameters) of the spherical connection ports 1-2 and 2-2 are made as small as possible, as shown in FIGS. 3 and 5. Thus, the sliding between the spherical connecting port portions 1-2 and 2-2, particularly, as shown in FIG. 7 to be described later, ensures a large tilt angle (tilt angle) between the pair of connecting port members 1 and 2. be able to.
Further, by reducing the diameters of the spherical connection ports 1-2 and 2-2, the wall K-1 and the ceiling of the building in a narrow space at the installation site of the ventilation device C shown in FIGS. Without interfering with the part K-2 and the like, it is possible to connect the connection exhaust port of the ventilation device C and the external exhaust port of the wall.

  In addition, both spherical connection port portions 1-2 and 2-2 are connected to the both spherical connection port portions 1-2 and 2-2 that are confined to the connection port portions 1-1 and 2-1 with a small diameter. -2 A regulation unit 7 is provided for regulating the mutual inclination angle and the inclination range.

≪Configuration of the regulation department≫
Here, description will be made with reference to FIGS. 1 to 6 as appropriate.
As shown in FIG. 1 to FIG. 6, the restricting portion 7 is an engaging convex portion provided in an inward protruding manner in the vicinity of the circumferential edge of the external fitting opening portion 4 of the spherical connection port portion 2-2 of the connection port B member 2. 7 a and an engaging groove 7 b provided on the spherical circumference of the spherical connection port portion 1-2 of the connection port A member 1.

As shown in FIG. 5, the engaging convex portion 7 a includes two circumferential edges of the outer fitting opening 4 where both ends of the tilt axis Y intersect and two circumferential edges of the outer fitting opening 4 where both ends of the straight line X intersect. They are formed at a total of four locations.
The locking projection 7a is formed in an inward semicircular shape by inward protrusion processing or the like, and is slidably engaged with the locking groove 7b.

  As shown in FIG. 3, the engaging groove 7 b is a rotation guide groove portion 7 b-provided in a ring shape along the spherical circumference of the inner fitting opening 3 on the plane formed by the straight line X and the tilt axis Y. 1 and a tilt guide groove portion 7b-2 provided in communication with the rotation guide groove portion 7b-1.

As shown in FIG. 1, the rotation guide groove portion 7 b-1 and the tilt guide groove portion 7 b-2 are formed by a groove width and a depth at which the locking convex portion 7 a can be slidably engaged.
As shown in FIG. 3, the tilt guide groove portion 7 b-2 is connected to the connection port portion 1-1 on the spherical circumference on one side (left side in FIG. 3) of the spherical connection port portion 1-2 where one end side of the straight line X intersects. Further, the spherical circumference on the other side (right side in FIG. 3) of the spherical connection port portion 1-2 where the other end side of the straight line X intersects, so as to reach the vicinity of the connecting portion between 1 and the spherical connection port portion 1-2. Are formed so as to reach the vicinity of the circumferential edge of the inner fitting opening 3 of the spherical connecting port 1-2.

Moreover, as shown in FIG.1 and FIG.2, the connection port A member 1 and the connection port B member 2 are made into the external fitting opening part 4 of the spherical connection port part 2-2 provided with the latching convex part 7a. The tilt alignment portion 8 is provided as a mark when tilting along the tilt guide groove 7b-2.
This tilting alignment portion 8 is for positioning the tilting axis Y shown in FIG. 3 and the tilting axis Y shown in FIG. 5 that are the tilting axes of the connection port A member 1 and the connection port B member 2 on the same axis. As shown in FIG. 6, as shown in FIG. 6, in the two locking projections 7 a provided at the opposite ends of the tilting axis Y, the outer peripheral edge of the outer fitting opening 4 is substantially half of the circumference. Provided in a circular shape.
As a result, the tilt alignment portion 8 is, for example, shown in FIG. 1 and the side of the universal joint A in the cylindrical direction (shown in FIG. 3 and the tilt axis Y shown in FIG. 5). 7 (a) by rotating the connection port A member 1 and the connection port B member 2 with the spherical center point P as the rotation axis so that the tilt axis Y is positioned on the coaxial line). The elbow shape of the tilt angle (tilt angle) shown in FIG. And by tilting the connection port portions 1-1 and 2-1 between the connection port A member 1 and the connection port B member 2 from this elbow form, each inclination shown in (b) and (c) of FIG. It can be freely changed to each elbow form of angle.

[Description of operation]
Next, the use of the universal joint A according to the first embodiment configured as described above will be briefly described.
FIG. 7 is a side view showing each elbow form of the universal joint when the connection port portions of the pair of connection port members are tilted.
FIG. 8 is a side view showing each form of the spherical universal joint when the connection port portion of the pair of connection port members is rotated from the elbow configuration shown in FIG. 7A, and the other connection port member side. FIG. 9 is a side view showing each form when the connection port portions of the pair of connection port members are rotated from the elbow form shown in FIG. It is a top view when it sees from the connection port member side. Here, description will be made with reference to FIGS. 1, 3 and 5 as appropriate.

  First, when the universal joint A has the elbow forms of 60 °, 75 °, and 90 ° shown in FIGS. 7A to 7C, for example, the forms shown in FIG. When the elbow configuration shown in FIG. 7 (a) is adopted, the tilting alignment portion 8 provided in the spherical connection port portion 2-2 on the connection port B member 2 side is connected to the side of the universal joint A in the cylindrical direction. The connection port A member 1 and the connection port B member 2 have the spherical center point P as the rotation axis so as to be positioned at the tilt axis Y shown in FIG. 3 and the tilt axis Y shown in FIG. By rotating each other, the elbow shape having an inclination angle of 60 ° shown in FIG.

Then, by tilting the connection port portions 1-1 and 2-1 between the connection port A member 1 and the connection port B member 2 with the tilting axis Y positioned on the coaxial line as the axis from this elbow form, 7 (b) and (c) can be freely changed into respective elbow forms with respective inclination angles of 75 ° and 90 °.
Moreover, by rotating the connection port A member 1 and the connection port B member 2 from each other with the spherical center point P as the rotation axis from the elbow form shown in FIG. To (c), and further can be freely changed to the respective forms shown in FIGS. 9 (a) to 9 (c).

  As described above, according to the universal joint A according to the first embodiment, the elbow forms having the inclination angles of 60 °, 75 °, and 90 ° shown in FIG. 7, and the connection port A as shown in FIGS. A twisted form in which the orientation of the tube axis Z of the connection port portion 1-1, 2-1 between the member 1 and the connection port B member 2 is changed to the other around the spherical center point P, and the tube axis Z direction is parallel. It has the flexibility that can be freely changed to various forms such as a substantially straight pipe form.

[Description of connection method using universal joint]
Next, a connection method using the universal joint A will be described.
FIG. 10 is a plan view and a front view of an example of a pipe configuration according to the connection method of the present invention using two sets of spherical universal joints.
As shown in FIG. 10, when two sets of universal joints A are used to connect the upward connection exhaust port 5 of the ventilator C and the lateral external exhaust port 6 attached to the wall K-1 of the building. First, the connection port part 1-1 on the connection port A member 1 side of a set of universal joints A is connected to the connection exhaust port 5. Then, the connection port B member 2 side is tilted and rotated with respect to the connection port A member 1 so that the opening (tube axis Z) of the connection port portion 2-1 on the connection port B member side is the opening of the external exhaust port 6. Adjust the direction to the direction.
Next, the connection port portion 2-1 on the connection port B member 2 side of the other universal joint A is connected to the external exhaust port 6, and the connection port A member 1 side is tilted with respect to the connection port B member 2 side. And the direction of rotating and positioning the opening (tube axis Z) of the connection port 1-1 on the connection port A member 1 side coaxially with the opening (tube axis Z) of the connection port 2-1 to be connected. Make adjustments.
That is, by adjusting the misalignment in the connecting direction, the connection port portion 2-1 on the connection port B member 2 side of the one set of universal joint A and the connection port A member 1 side of the other set of universal joint A are arranged. With the connection form in which the connection port 1-1 is directly connected, the upward connection exhaust port 5 of the ventilation device C and the lateral external exhaust port 6 of the wall K-1 can be connected.

FIG. 11 is a plan view and a front view showing an example of the connection method of the present invention by combining two sets of spherical universal joints and a straight pipe.
As shown in FIG. 11, by using two sets of universal joints A and straight pipes B, the upward connection exhaust port 5 of the ventilation device C and the lateral external exhaust port 6 attached to the wall K-1 of the building. First, the connection port portion 1-1 on the connection port A member 1 side of the set of universal joints A is connected to the connection exhaust port 5 in the same manner as the connection method described above. Then, the connection port B member 2 side is tilted and rotated with respect to the connection port A member 1 so that the opening (tube axis Z) of the connection port portion 2-1 on the connection port B member side is the opening of the external exhaust port 6. Adjust the direction to the direction.
Next, the connection port portion 2-1 on the connection port B member 2 side of the other universal joint A is connected to the external exhaust port 6, and the connection port A member 1 side is tilted with respect to the connection port B member 2 side. And the direction of rotating and positioning the opening (tube axis Z) of the connection port 1-1 on the connection port A member 1 side coaxially with the opening (tube axis Z) of the connection port 2-1 to be connected. Make adjustments.
In this way, the connection port portion 2-1 on the connection port B member 2 side of the one set of universal joint A and the connection port portion 1-1 on the connection port A member 1 side of the other set of universal joints A are connected. After adjusting the misalignment with respect to the connection direction positioned on the same axis, both connection ports 2 are connected so as to connect between the connection port 2-1 and the connection port 1-1 positioned on the same axis. By connecting the straight pipe C over -1,1-1, the upward connection exhaust port 5 of the ventilation device C and the lateral external exhaust port 6 of the wall K-1 can be connected.
In other words, in this connection method, in addition to the direction adjustment to adjust the misalignment of the connection direction, the straight pipe B is combined, and the ventilation device C is directed upward at the required pipe length according to the installation site of the ventilation device C or the like. It is possible to connect the connection exhaust port 5 to the lateral external exhaust port 6 of the wall K-1.

  In addition, although illustration is abbreviate | omitted, as for the straight pipe | tube B, what does not have the unevenness | corrugation etc. which may become the ventilation resistance which obstructs the flow of airflow, and whose pipe | tube inner peripheral surface can be adjusted suitably for length is used. it can.

Next, the spherical universal joint of the present invention according to the second embodiment will be described.
FIG. 12 is a longitudinal sectional view showing an elbow form of the spherical universal joint of the present invention according to the second embodiment, and FIG. 13 is a perspective view showing the spherical universal joint.
In the universal joint A-1 according to the second embodiment, as shown in FIG. 12, the connection port A member 1 and the connection port B member 2 of the universal joint A described in detail in the first embodiment are tilted. The form of the restricting portion 9 that restricts the tilting range when changing is changed. Since the other components are basically the same as the detailed description of the first embodiment, the same reference numerals are given to the same components, and the duplicate description is omitted.

  That is, as shown in FIG. 12 and FIG. 13, the restricting portion 9 that restricts the tilting range when the connecting port A member 1 and the connecting port B member 2 are tilted to each other in the elbow shape is formed as a spherical shape of the connecting port A member 1. It is set as the structure provided only in the connection port part 1-2 side.

≪Configuration of the regulation department≫
FIG. 14 is a longitudinal sectional view and a plan view showing one connection port member side, FIG. 15 is a perspective view showing the same connection port member, and FIG. 16 shows the other connection port member side. FIG. 17 is a perspective view showing the other connection port member.
The restricting portion 9 is a plane formed by a straight line X and a tilt axis Y as shown in FIG. 14 on the spherical circumference of the spherical connecting port portion 1-2 of the connecting port A member 1 described in detail in the first embodiment. Above, the protrusion provided in the range of the spherical-circumferential part which cross | intersects the both ends of the tilting axis Y from the other side (right side of the paper surface of FIG. 14) of the spherical circumference of the spherical connection port part 1-2 where the other end side of the straight line X intersects. It consists of ribs 9a.

  Thereby, in the universal joint A-1, the external fitting opening 4 of the spherical connection port 2-2 of the connection port B member 2 shown in FIGS. 16 and 17 is open on both sides of the ridge rib 9a and the ridge rib 9a. In the range which hits the connection part vicinity of the connection port part 1-1 shown by a dashed-two dotted line and the spherical connection port part 1-2 from an edge part, the connection port A member 1 and the connection port B member 2 are mutually It is formed so that the tilting operation is performed.

[Description of operation]
Next, the use of the universal joint A-1 according to the second embodiment configured as described above will be briefly described. Here, description will be made with reference to FIG. 12 and FIGS. 7 to 9 as appropriate.
First, when the universal joint A-1 is in the respective elbow forms of 60 °, 75 °, and 90 ° as shown in FIG. 12 and FIGS. As described in detail in the embodiment, the connection port A member 1 and the connection port B member 2 are rotated relative to each other about the spherical center point P as a rotation axis, whereby an inclination angle 60 shown in FIG. ° elbow form.

And by tilting the connection port parts 1-1 and 2-1 between the connection port A member 1 and the connection port B member 2 from the open ends on both sides of the rib 9a from this elbow form, It can be freely changed into elbow shapes with inclination angles of 75 ° and 90 ° respectively shown in b) and (c).
Further, by rotating the connection port A member 1 and the connection port B member 2 from each other with the spherical center point P as a rotation axis from the elbow form shown in FIGS. From (a) to (c), it is possible to freely change to each form shown in (a) to (c) of FIG.

Next, a spherical universal joint of the present invention according to a third embodiment will be described.
FIG. 18 is a longitudinal sectional view showing an elbow form of the spherical universal joint of the present invention according to the third embodiment, and FIG. 19 is a perspective view showing the spherical universal joint.
In the universal joint A-2 according to the third embodiment, as shown in FIGS. 18 and 19, the connection port of the universal joint A described in detail in the first embodiment as in the second embodiment. The form of the regulation part 10 which regulates the tilting range when tilting the A member 1 and the connection port B member 2 is changed. Since the other components are basically the same as the detailed description of the first embodiment, the same reference numerals are given to the same components, and the duplicate description is omitted.

  That is, as shown in FIG. 18 and FIG. 19, the restricting portion 10 that restricts the tilting range when the connection port A member 1 and the connection port B member 2 are tilted to each other in the elbow shape is formed into a spherical shape of the connection port A member 1. It is set as the structure provided only in the connection port part 1-2 side.

≪Configuration of the regulation department≫
FIG. 20 is a longitudinal sectional view showing one connecting port member side, and FIG. 21 is a perspective view showing the same connecting port member. Here, description will be made with reference to FIG. 18 and FIGS. 16 and 17 as appropriate.
The restricting portion 10 includes a first step portion 10a and a second step portion 10b respectively provided on the spherical circumference of the spherical connection port portion 1-2 of the connection port A member 1 described in detail in the first embodiment. It is formed in preparation.

As shown in FIGS. 20 and 21, the first step portion 10 is on the other side of the spherical circumference where the other end side of the straight line X intersects (on the right side of FIG. 20) on the plane formed by the straight line X and the tilt axis Y. ) To the opposite ends of the tilt axis Y.
The second step portion 10b is on one side of the spherical circumference where one side of the straight line X intersects from the spherical circumferential portion that intersects with both ends of the tilting axis Y connected to the first step portion 10a (left side in FIG. 20). Are provided along the circumference of the spherical surface within a range reaching the vicinity of the connecting portion between the connection port 1-1 and the spherical connection port 1-2.

  Accordingly, the universal joint A-2 includes the first stepped portion 10a and the second stepped portion in which the outer fitting opening portion 4 of the spherical connecting port portion 2-2 of the connection port B member 2 shown in FIGS. The connection port A member 1 and the connection port B member 2 are formed so as to be tilted with respect to each other in a range where they hit 10b.

[Description of operation]
Next, the use of the universal joint A-2 according to the third embodiment configured as described above will be briefly described. Here, description will be made with reference to FIG. 18 and FIGS. 7 to 9 as appropriate.
First, when the universal joint A-2 has the elbow forms of 60 °, 75 °, and 90 ° as shown in FIGS. The external fitting opening 4 of the spherical connection port portion 2-2 of the B member 2 is abutted against the first step portion 10a of the spherical connection port portion 1-2 of the connection port A member 1, and in this state, the above-described embodiment. As described in detail, the connection port A member 1 and the connection port B member 2 are rotated relative to each other about the spherical center point P as a rotation axis, thereby the inclination angle of 60 ° shown in FIG. It can be in elbow form.

And from this elbow form, the connection port between the connection port A member 1 and the connection port B member 2 until the second stepped portion 10b hits the external fitting opening 4 of the spherical connection port portion 2-2 of the connection port B member 2 By tilting the parts 1-1 and 2-1, the elbow forms can be freely changed to the respective elbow angles of 75 ° and 90 ° shown in FIGS. 7B and 7C, respectively.
Further, by rotating the connection port A member 1 and the connection port B member 2 with each other from the elbow form shown in FIG. 18 and FIG. From (a) to (c), it is possible to freely change to each form shown in (a) to (c) of FIG.

The specific configuration of the embodiment of the present invention is not limited to the above-described embodiment, and there are design changes and the like without departing from the gist of the present invention described in claims 1 to 11. Are also included in the present invention.
For example, in the universal joint A according to the first embodiment, only one of the tilting guide groove portions 7b-2 provided on both the spherical circumferences of the spherical connecting port portion 1-2 where both ends of the straight line X intersect with each other is sufficient. The tilting guide groove 7b-2 is also provided in the engaging projection 7a that is provided in the external fitting opening 4 on the spherical connecting port 2-2 side and is slidably engaged with the tilting guide groove 7b-2. Only one of them can be used. That is, the engagement convex portions 7a may be provided at a total of three locations instead of the total of four locations described in detail in the first embodiment.

Further, in the universal joints A-1 and A-2 according to the second and third embodiments, the protruding rib 9a, the first step portion 10a, and the second step portion 10b are made of an elongated bar or other member. It is possible to adopt a structure such as providing by attaching by fixing means such as welding.
12 to 15, the protrusion rib 9a is not limited to a single continuous form, but, for example, a spherical circle of the spherical connection port portion 1-2 where the other end side of the straight line X intersects in FIG. It is optional, for example, intermittently provided at at least three locations of the circumferential portion and the spherical circumferential portion where both ends of the tilt axis Y intersect.

A, A-1, A-1 Spherical type universal joint 1 Connection port A member (one connection port member)
2 Connection port B member (the other connection port member)
1-1, 2-1 Connection port portion 1-2, 2-2 Spherical connection port portion 3 Inner fitting opening portion 4 Outer fitting opening portion 7 Restriction portion 7a Engaging convex portion 7b Engaging groove 7b-1 Rotating guide groove portion 7b-2 Tilt guide groove portion 9 Restriction portion 9a Rib rib 10 Restriction portion 10a First step portion 10b Second step portion P Spherical center point X Straight line Y Tilt axis (crossing straight line)
Z tube axis

Claims (11)

A spherical universal joint having flexibility,
A connection port comprising a straight pipe,
It comprises a pair of connection port members each formed with a spherical connection port portion that is connected to one end of this connection port portion and is slidably fitted and connected to each other,
Of the pair of connection port members, the spherical connection port portion of one connection port member is formed to be slidably connected to the spherical connection port portion of the other connection port member with an internal fit. Spherical universal joint characterized by The pair of connection port members are arranged so that a tube axis of the connection port portion is located at a position deviated from a spherical center point of the spherical connection port portion formed in a substantially hemispherical shape, and a spherical circle of the spherical connection port portion is formed. The circumference is connected to the connection port,
Further, the connection port portions are formed to be tiltable on a plane formed by the tube axis and the spherical center point, and to be rotatable about the spherical center point as a rotation axis. The spherical universal joint according to claim 1. Of the pair of connection port members,
The internal fitting opening of the spherical connection port of one connection port member is formed with respect to a plane formed by a straight line passing through the spherical center point and the tube axis and an intersecting straight line passing through the spherical center point and orthogonal to the plane. From the one end side of the straight line that intersects the spherical circumference of the spherical connection port portion on the spherical center point side to the other end side of the straight line that intersects the spherical circumference of the spherical connection port portion on the tube axis side Therefore, it is formed into an opening shape that gradually separates,
The external fitting opening of the spherical connection port of the other connection port member is substantially in a plane formed by a straight line passing through the spherical center point and the tube axis and an intersecting straight line passing through the spherical center point and orthogonal to the plane. The spherical universal joint according to claim 1, wherein the spherical universal joint is formed in an opening shape along the shape.   4. The control device according to claim 1, wherein the spherical connection port portion of the pair of connection port members is provided with a restriction unit that restricts the tilting range between the pair of connection port members. 5. The spherical universal joint described in 1. The restricting portion is an engagement convex portion provided in an inward projecting shape in the vicinity of a circumferential edge of the external fitting opening of the spherical connection port of the other connection port member;
An engagement groove provided on a spherical circumference of the spherical connection port portion of the one connection port member, the engagement convex portion being slidably engaged,
The engagement convex portion includes two circumferential edges of the outer fitting opening at the spherical circumferential portion where both ends of the intersecting straight line intersect, and the outer fitting opening at the spherical circumferential portion where both ends of the straight line intersect. Formed in at least one place on the circumference of the circle,
The engaging groove includes a rotation guide groove provided in a ring shape along the spherical circumference of the inner fitting opening on the plane formed by the straight line and the intersecting straight line, and the rotation guide groove Communicated to reach the vicinity of the connecting portion between the connection port portion and the spherical connection port portion on the one end side of the straight line and / or to the spherical connection port portion on the other end side of the straight line. The spherical universal joint according to any one of claims 1 to 4, wherein the spherical universal joint is formed of a tilt guide groove provided to reach the vicinity of a circumferential edge of the inner fitting opening.   4. The control device according to claim 1, wherein a restriction portion for restricting a tilting range between the pair of connection port members is provided in the spherical connection port portion of the one connection port member. 5. The spherical universal joint described in 1. The restricting portion is arranged on the spherical circumference in a circumferential range intersecting with both ends of the intersecting straight line from the other side of the spherical circumference where the other end of the straight line intersects on the plane formed by the straight line and the intersecting straight line. Consisting of ridge ribs provided along,
The external fitting opening of the spherical connecting port portion of the other connecting port member has the protruding rib and the connecting port portion on the one side of the straight line and the spherical connecting port from both open ends of the protruding rib. The spherical universal joint according to claim 6, wherein the pair of connection port members are configured to be inclined with respect to each other within a range in which they are in contact with the vicinity of the connecting portion with the portion. The restricting portion extends along the spherical circumference within a range where the other end of the straight line intersects with the both ends of the intersecting straight line on the plane formed by the straight line and the intersecting straight line. A first step provided;
The connection port portion and the spherical connection port portion on one side of the spherical circumference where one side of the straight line intersects from the spherical circumferential portion intersecting with both ends of the intersecting straight line provided continuously with the first step portion. A second step portion provided along the spherical circumference in a range reaching the vicinity of the continuous portion,
The pair of connection port members are inclined with respect to each other in a range in which the outer fitting opening of the spherical connection port of the other connection port member abuts against the first stepped portion and the second stepped portion. The spherical universal joint according to claim 6, wherein the spherical universal joint is formed as described above.   The spherical universal joint according to any one of claims 1 to 8, wherein the spherical universal joint is formed of a non-combustible material. A connection method using the spherical universal joint according to any one of claims 1 to 9,
A connection method using a spherical universal joint, wherein two sets of spherical universal joints comprising the pair of connection port members are prepared, and the two sets of spherical universal joints are used. A connection method using the spherical universal joint according to any one of claims 1 to 9,
Two spherical universal joints comprising the pair of connection port members are prepared, and a connection method using a spherical universal joint is performed through a straight pipe between the two sets of spherical universal joints.

Images