JP4458427B2 - Pipe connection structure - Google Patents

Description

  The present invention belongs to the technical field of a pipe connection structure for connecting a plurality of pipes, and particularly relates to a pipe connection structure in which another pipe is inserted inside an arbitrary pipe and fixed to each other.

  Traditionally, in kitchens for restaurants, school lunchrooms, sinks for food processing factories, work tables, tabletops, dishwashing equipment, cooking equipment, etc., metal structural materials are used to build these frames. Is often adopted.

  Such structural materials were mainly pipes made of iron with antibacterial coating or coating, resin, or stainless steel with a polished surface from the viewpoint of improving and maintaining hygienic conditions. Such pipes have various shapes such as circular, elliptical and rectangular in cross section. When connecting each pipe, welding or elbow, cheese, or special joint t as shown in FIG. It has been usual to employ a method of fitting the pipe p and fixing the dedicated joint t to the pipe p with a screw b or the like.

In addition to the above, there is a device shown in Patent Document 1 as a pipe connection structure using a dedicated joint. This device is characterized in that a pipe to be connected (coupled) to a joint, for example, an elbow joint, is fitted, and this pipe is fixed by a tapping screw penetrated from the outer surface of the joint fitting portion.
Utility model registration number 3028980 (2nd page, Fig. 1)

However, the conventional pipe connection structure has the following problems.
First, in the case of a connection structure by welding, for example, when the material is stainless steel or aluminum, the welding action itself is technically difficult, and it is necessary to clean and polish the weld bead after welding. Together, there was a problem that increased costs.

  Further, since the weld bead becomes a projection, dust or dust remains due to the usual cleaning or the like of this portion, and there is a problem that it can become a hotbed for generation of germs and the like.

  In the connection structure with the dedicated joint shown in Patent Document 1 and the like, in addition to the fitting portion of the joint portion being a protrusion, the fitting portion of the joint is particularly fixed with screws from the outside. There is a problem that the screw is liable to loosen, and the pipe inserted into the joint is "rotated" or "missed", resulting in a decrease in the rigidity of the frame.

  Accordingly, the present invention has been made in view of the above problems, and provides a pipe connection structure that has a simple structure but does not have extra protrusions in the connection part and can realize a strong connection state.

In order to solve the above problems, the pipe connection structure of the present invention adopts the following configuration.
That is, the main pipe (2) and the main pipe (2) are inserted into the inside of the main pipe (2) through a penetrating opening (21) opened in a side surface of the main pipe (2) in a direction substantially perpendicular to the axis (23). A connecting plate (3), and a fixing plate (4) contacting at least three points with the inner wall (22) on the cross section of the main pipe (2), the fixing plate (4) and the above-mentioned The connection pipe (3) is characterized in that the connection pipe (3) is sandwiched and fixed by two fixing plates (4) .

  The penetration of the connection pipe (3) is characterized in that the axis (33) of the connection pipe (3) is penetrated so as not to intersect the axis (23) of the main pipe (2).

  When two or more connecting pipes (3) are to be penetrated, they are penetrated on the same cross section of the main pipe (2) with a predetermined scissor angle, for example, substantially right angle (90 degrees), and the main pipe ( 2) The two connecting pipes (3), the side surfaces and butted ends (31), and the fixing plate (4) are fixed to each other with screws (5) so as to be detachable. It is said.

Said fixed plate (4) may be a shape inscribed to conform to the inner wall (22) of the main pipe (2), so as to sandwich the connecting pipe (3) in the two fixed plates (4) It is fixed.

  Furthermore, when penetrating with a right angle between the scissors angle, the intersection of the axes (33) of the two connecting pipes (3) butted together penetrates with a predetermined distance from the axis (23) of the main pipe (2). It is characterized by that.

  Note that the reference numerals in parentheses described in the claims and the means for solving the above-described problems are added with reference numerals for easy understanding of the configuration of the invention. Of course, it is not limited to the above form.

Since the pipe connection structure of the present invention has the above configuration, the following effects are exhibited.
A plurality of connecting pipes that penetrate through are constrained by a through-opening that opens in the main pipe with respect to the rotational displacement with respect to the cross section of the main pipe, and are fixed so that the rotational displacement (inclination) in the longitudinal section (axial direction) of the main pipe is inscribed in the main pipe. In addition to being restrained by the plate, the connection pipes are also fixed together. That is, since the main pipe and the plurality of connecting pipes are fixed to each other with two or more directions of restraint, the main and connecting pipes are all integrated, and the connecting structure is further strengthened.

  Further, since the connecting pipe penetrates the connecting pipe by shifting by a predetermined amount so that the axis of the connecting pipe and the axis of the main pipe do not cross each other, the rotation center position of the connecting pipe and the fixing plate for fixing the axis (the axis of the main pipe) And the projection position are the same). Therefore, even if a rotational force is applied to the connecting pipe in the cross-sectional direction of the main pipe due to an impact or the like, the rotation of the fixed plate is suppressed. In other words, it is difficult to transmit the rotational force of the connecting pipe directly to the fixed plate.

  Furthermore, since the fixing plate and the side surfaces and ends of the connecting pipe are fixed inside the main pipe, the fixing means such as screws and bolts are not loosened by an external impact on the connecting portion, and is structurally strong. Furthermore, since there is no projection in the pipe connecting part, it is easy to clean and the effect of improving the sanitary condition can be expected, and the contribution to the industry is remarkable.

  Hereinafter, the best embodiment of a pipe connection structure 1 (hereinafter abbreviated as “the present connection structure”) according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a partially cutaway perspective view showing a sink constructed by the connection structure, FIG. 2 is a partially cutaway perspective view showing an embodiment of the connection structure, and FIG. 3 is an embodiment of the connection structure. FIG. 4 is an explanatory view (A) and (B) showing the operation of the connection structure, FIG. 5 is a perspective view showing an application example of the connection structure, and FIG. It is a perspective view (A) and (B) which show the example of a change of embodiment of a connection structure.

  The sink S shown in FIG. 1 is constructed by connecting stainless steel pipes to each other by the connecting structure 1.

  In this connection structure 1, the connection pipe 3 that lies on the side surface of the main pipe 2 that serves as a support leg is inserted at a substantially right angle (90 degrees) with respect to the axis 23, and is fixed to each other inside the main pipe 2. And connected.

  The main pipe 2 opens through-holes 21 at substantially right angles (90 degrees) at two locations on the same cross section on the side surface. The penetration port 21 is an opening through which the outer peripheral portion of the connection pipe 3 can be inserted in a substantially fitted state, and forms a scissor angle θ that is substantially perpendicular to each other after the connection pipe 3 has penetrated. Further, the penetrating opening 21 is opened at the intersection point of the axis line (same as the axis line 33 of the connecting pipe 3 to penetrate) with the axis 23 of the main pipe 2 having a predetermined amount of “deviation a”. ing. For this reason, even if the connecting pipe 3 penetrates, the axis 33 of each connecting pipe 3 does not intersect the axis 23 of the main pipe 2.

  The penetrating port 21 is formed by punching such as a press, and the number thereof may be one or three or more. The number of the penetrating ports 21 may be appropriately determined depending on the frame configuration of the sink S and the outer diameters of both pipes 2 and 3. It is what is set.

  As described above, the connecting pipe 3 is a pipe that penetrates into the penetration port 21 of the main pipe 2 with a fitting state. The connection pipe 3 has an end portion 31 so that the penetration side is accommodated in the main pipe and is joined to the penetration side of the other connection pipe 3 in a butted state. Note that the shape of the end portion 31 is appropriately changed depending on the number of the connecting pipes 3 to be inserted.

  Further, a through-hole 32 for disposing a screw 5 which is a connecting means to the fixing plate 4 described later is opened on the side surface of the connecting pipe 3. The through holes 32 are appropriately set according to the number and size of the screws 5 to be arranged.

  Reference numeral 4 denotes a fixed plate. The fixed plate 4 is a plate disposed inside the main pipe 2 and has a disk shape so as to be inscribed in a substantially fitted state on the inner wall 22 of the main pipe 2. Two fixing plates 4 are arranged so as to sandwich the connecting pipe 3, and a screw hole 41 is opened at a position corresponding to the through hole 32 of the connecting pipe 3. And the screw | thread 5 which penetrates both this screw hole 41 and the through-hole 32 of the connection pipe 3 is arrange | positioned, and the fixing plate 4 and the connection pipe 3 are mutually fixed by fastening the nut 51. FIG. Due to this configuration, the fixing plate 4 and the connecting pipe 3 can be attached and detached by adjusting the fastening state of the nut 51.

The fixed plate 4 is preferably disk-shaped, but can be a so-called rice ball (triangle), rectangle, or other polygonal shape as long as it contacts the inner wall 22 of the main pipe 2 at three or more points. .
[Action]

  As described above, the structure of the connection structure 1 is such that the ends of the connection pipe 3 penetrating into the main pipe 2 are abutted with each other, and the side surface of the connection pipe 3 is sandwiched between the fixed plates 4 disposed in the main pipe. These are fixed to each other with screws 5. Therefore, the rotation of the connecting pipe 3 in the cross-sectional direction (horizontal direction in the present embodiment) of the main pipe 2 is restricted by the through-hole 21, and the rotational deviation in the longitudinal cross-sectional direction (vertical direction in the present embodiment) of the main pipe 2. (Inclination) is restrained by the friction between the fixed plate 4, that is, the outer peripheral edge of the fixed plate 4 and the inner wall 22 of the main pipe 2. That is, the connecting pipe 3 is restrained by the main pipe 2 and the fixed plate 4 in the two horizontal and vertical directions, and further by another connecting pipe 3, so that the integrity of the pipes 2 and 3 is stronger. It is.

Further, as shown in FIG. 4, since there is a predetermined amount of "deviation a" between the axis 33 of the connecting pipe 3 and the axis 23 of the main pipe 2, the rotation of the axis 33 of the connecting pipe 3 and the fixed plate 4 fixed thereto. The center position is also shifted. Therefore, even if a rotational force, particularly a rotational force in the cross-sectional direction of the main pipe 2 is applied to the connecting pipe 3 due to an impact or the like, the rotation of the fixed plate 4 is suppressed. In other words, the rotational force of the connecting pipe 3 is difficult to transmit directly to the fixed plate 4.
[Possibility of other embodiments]

  In the present connection structure 1, the connection pipe 3 penetrating into the main pipe 2 is sandwiched by the fixing plate 4 and fixed by screws 5 and nuts 51 that are disposed through the connection pipe 3 and the fixing plate 4. However, as shown in FIG. 5, if the screw 5 is changed to the tapping screw 52, the fixing plate 4 may be disposed only on one side of the connecting pipe 3 and fixed with the tapping screw 52. If this form is adopted, the arrangement of the fixed plate 4 is limited to one side, so that there is an advantage that the connecting work is facilitated.

  The fixing means may also weld the outer peripheral edge of the fixing plate 4 and the inner wall 22 of the main pipe 2 without using fixing means such as screws.

  Further, if the shaft 6 having both ends threaded is passed through the connecting pipe 3 and the fixing plate 4 and fastened and fixed by the nut 61, the connecting structures can be connected to each other inside the main pipe. The frame rigidity of the sink S adopting the structure can be further improved.

  Note that the cross-sectional shapes of the main pipe 2 and the connecting pipe 3 employed in the present connecting structure are not limited to circular shapes, and an elliptical pipe 7 and a rectangular square pipe 8 are appropriately used as shown in FIG. It may be adopted.

It is a partially notched perspective view which shows the sink constructed | assembled by this connection structure. It is a partially notched perspective view which shows the Example of this connection structure. It is an assembly perspective view which shows the Example of this connection structure. It is explanatory drawing (A) and (B) which show the effect | action of this connection structure. It is a perspective view which shows the application example of this connection structure. It is a perspective view (A) and (B) which show the example of a change of the embodiment of this connection structure. It is a perspective view which shows the conventional pipe connection structure.

Explanation of symbols

1 connection structure 2 main pipe 21 penetrating inlet 22 inner wall 23 axis 3 connection pipe 31 end 32 through hole 33 axis 4 fixing plate 41 screw hole 5 screw 51 nut 52 tapping screw 6 shaft 61 nut 7 elliptical pipe 8 square pipe S sink a Deviation θ Scissor angle b Thread p Pipe t Special joint

Claims (5)

The main pipe (2),
A connecting pipe (3) penetrated into the main pipe (2) in a direction substantially perpendicular to the axis (23);
A fixing plate (4) in contact with the inner wall (22) on the transverse section of the main pipe (2) at at least three points;
And
The fixed plate (4) and the connecting pipe (3) are fixed to each other by sandwiching the connecting pipe (3) between two fixed plates (4) . In the penetration of the connecting pipe (3),
The pipe connection structure according to claim 1, characterized in that the axis (33) of the connection pipe (3) is penetrated so as not to intersect the axis (23) of the main pipe (2). In the penetration of the connecting pipe (3),
The pipe connection structure according to claim 1 or 2, characterized in that two or more connection pipes (3) are made to penetrate and abut on the same cross section of the main pipe (2) with a predetermined scissor angle. The main pipe (2),
Two connecting pipes (3) which are pierced into the main pipe (2) in a direction perpendicular to the axis and with a right angle between the scissors on the same cross section;
1 or 2 plate-like fixing plates (4) inscribed in conformity with the inner wall (22) on the cross section of the main pipe (2);
A pipe connecting structure characterized in that the fixing plate (4) and the end portions (31) of the two connecting pipes (3) butted together are detachably fixed. The intersection of the axes (33) of the two connecting pipes (3) that have been penetrated with the scissor angle at a right angle is made to penetrate at a predetermined distance from the axis (23) of the main pipe (2). The pipe connection structure according to claim 4 .

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