JPH0729290Y2 - Joint and pipe connection structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint-pipe connecting structure, and more particularly to a joint-pipe connecting structure for disassembling a resin joint and a resin-coated steel pipe.

[0002]

2. Description of the Related Art Conventionally, this type of joint and pipe connection structure is a resin joint pipe insertion which is integrally joined at a required angle such as L-shaped, T-shaped, V-shaped or linear. A pipe made of a resin-coated steel pipe is inserted into the pipe insertion hole of the tubular portion, and a tapping screw is screwed into the pipe from the screw insertion hole of the pipe insertion tubular portion to form a disassembleable connection structure.

When the tapping screw is screwed in, the pipe inserted into the pipe insertion hole is provided with a pilot hole from a hole previously provided in the pipe insertion cylinder portion.

[0004]

However, in the above-mentioned conventional joint-pipe connecting structure, since the pilot hole into which the tapping screw is screwed is provided in the pipe made of the resin-coated steel pipe, rust occurs and the hole is generated. There was a drawback that the start work was complicated.

On the other hand, a pipe structure constructed by disassembling and connecting a pipe made of one resin-coated steel pipe with a resin joint has an advantage that it is lightweight and easy to be changed or repaired, but it has a load bearing capacity. For pipe structures such as trucks and shelves that have a low load and are subject to a large load, a double pipe consisting of two resin-coated steel pipes must be connected using a resin joint so that it can be disassembled to increase its load resistance. Has been requested.

Therefore, an object of the present invention is to provide a joint-pipe connecting structure which does not cause rust in the disassembling connection of a resin joint and a double pipe and which can easily and accurately carry out the connecting work.

[0007]

In order to solve the above-mentioned problems, the first joint-pipe connecting structure of the present invention comprises:
A resin joint in which a plurality of pipe insertion cylinders having B-shaped pipe insertion holes are integrally joined at a required angle, and two resin-coated steel pipes are formed in the longitudinal direction integrally with each coating resin. A connection structure with a double pipe that is assembled by a ridge that can be engaged with each other and that can be inserted into the pipe insertion hole, and a bolt insertion hole is formed in the middle of the height on the curved wall side of the pipe insertion cylinder portion of the resin joint. On the other hand, a nut hole is provided on the ridge of the double pipe so as to correspond to the above bolt insertion hole, and the double pipe is locked over a part of the outer circumference of both resin-coated steel pipes and inserted into the nut hole. The plate nut is positioned on the straight wall side of the pipe insertion cylinder and inserted into the pipe insertion hole, and the bolt inserted from the bolt insertion hole is screwed into the screw hole of the plate nut.

In the second joint-pipe connecting structure, a resin joint in which a plurality of pipe-inserting cylinders each having a B-shaped pipe-inserting hole are integrally joined at a required angle, and the above-mentioned pipe-inserting member are provided. A connection structure with a double pipe consisting of two resin-coated steel pipes that can be inserted into holes, in which a bolt insertion hole is provided in the middle of the height on the curved wall side of the pipe insertion cylinder part of the resin joint, while the pipe insertion A double pipe was inserted into the pipe insertion hole of the tubular portion, and a rod-shaped or plate-shaped nut having at least a length equal to the depth of the pipe insertion hole and a screw hole corresponding to the bolt insertion hole was inserted into the pipe insertion hole. The double pipe is inserted into the straight wall side of the pipe insertion tubular part so as to be straddled over a part of the outer circumference of both resin-coated steel pipes, and from the bolt insertion hole into the screw hole of the rod-shaped or plate-shaped nut. Insertion The bolt is what is screwed.

[0009]

In the first means, the screw hole into which the bolt is screwed is not directly drilled in the double-pipe resin-coated steel pipe itself, and the pilot hole is not required, and the plate nut is The double pipe can be inserted into the pipe insertion hole only when the double pipe is positioned on the straight wall side of the pipe insertion tubular portion.

Further, in the second means, as in the first means, the screw hole into which the bolt is screwed is not directly drilled into the resin-coated steel pipe itself of the double pipe, and the lower hole It is not necessary to form a hole, and the rod-shaped or plate-shaped nut can be inserted into the pipe insertion hole only when the nut is positioned on the straight wall side of the pipe insertion cylinder.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of a main portion of a trolley base having a joint and pipe connecting structure according to a first embodiment of the present invention.

This trolley base 1 has four corner joints 2, one on each side in the depth direction (upward leftward direction in the figure), and two in front and rear in the frontage direction (downward leftward direction in the figure). A double pipe 3 that is used and is connected to a rectangular frame shape that can be disassembled by each corner joint 2 to form a frame pipe, and a caster 4 that is detachably attached to the lower portion of each corner joint 2.
It consists of and.

The corner joint 2 is formed by injection molding an engineering plastic such as PET (polyethylene terephthalate) and has a B-shaped pipe insertion hole (not shown) into which the double pipe 3 in the depth direction is inserted. It has a depth pipe insertion cylinder portion 5 of the book and a B-shaped pipe insertion hole 6 into which the double pipe 3 in the front direction is inserted at a right angle to the depth pipe insertion cylinder portion 5, and the tip portion of the depth pipe insertion cylinder portion 5 (in the figure, Left front end and right end (right end in the figure) are joined to each other at right angles, and two frontage pipe insertion cylinders 7 provided parallel to each other and a depth pipe insertion cylinder 5 at the base end and outside (the drawing) In the right side), a protruding portion fitting tubular portion 9 provided at an intersection with the frontage pipe insertion tubular portion 7 and having a vertically extending hole 8 through which a lower protruding portion or the like of a frame body (not shown) is fitted and removed.
And extending in the middle of the height of the pipe insertion cylinders 5 and 7 so as to connect the pipe insertion cylinders 5 and 7 at the corners surrounded by the pipe insertion cylinders 5 and 7 in two directions at right angles, and providing the same shape on the front and back sides. And a caster mounting portion 10.

Then, in the curved walls of the pipe insertion cylinders 5 and 7, two bolt insertion holes 11 into which bolts for fixing the double pipe 3 are inserted are located in the middle of the height, as will be described later. Further, they are provided separately in the longitudinal direction. On the other hand, the caster mounting portion 10 is provided with a plurality of bolt insertion holes 12 for the caster mounting bolts in the middle of the depth direction so as not to impair the front-back identity, and is appropriately spaced in the front direction. At the same time, ribs 13 are appropriately provided on both front and back surfaces.

As described above, the caster mounting portion 10 has the same shape on the front and back sides, and is provided at the middle of the heights of the pipe insertion tube portions 5, 7, so that the corner joint 2 has a symmetrical shape on the front and back sides. Type 1 can be shared left, right, front and back.

The double pipe 3 comprises two resin-coated steel pipes 14 each having a thin-walled steel pipe having an outer diameter of about 28 to 32 mm and an outer periphery of which is coated with a synthetic resin such as AAS. And the projections 15 and 16 which are integrally formed with each other in the longitudinal direction and which can engage with each other, and the projections 15 and 1 of the double pipe 3.
A nut hole 17 corresponding to the bolt insertion hole 11 is formed in the pipe 6 in a state where the double pipe 3 is inserted into the pipe insertion hole 6. And, the connection between the corner joint 2 and the double pipe 3 in the depth direction and the frontage direction is performed by the double pipe 3
The gull wing-shaped engaging portion 18 is engaged with a part of the outer circumference of both resin-coated steel pipes 14, 14
The plate nut 20 in which the shaft portion 19 is inserted into the nut holes 17 of the pipes 5, 16 is located on the straight wall side of each pipe insertion cylinder portion 5, 7, and the double pipe 3 is inserted into each pipe insertion cylinder portion 5, 7.
, And the bolts 22 inserted from the bolt insertion holes 11 are screwed into the screw holes 21 of each plate nut 20 so as to be disassembled.

The caster 4 is made of the same engineering plastic as the corner joint 2 and has a pair of turning wheels and fixed wheels, and the caster mounting portion 10 of the corner joint 2 has appropriate bolt insertion holes. It is removably attached by means of bolts 23 screwed in from 12 and other fasteners.

The dolly base 1 having the above-described structure can be easily replaced and repaired when some of the corner joints 2, the double pipes 3 or the casters 4 are damaged, and the dolly base 1
When changing the size of, the change becomes easy by replacing with the double pipe 3 having a required length dimension.

FIG. 2 is an exploded perspective view of a joint-pipe connecting structure according to a second embodiment of the present invention.

In the joint-pipe connecting structure of this embodiment, a resin joint 26 in which two pipe-inserting cylinder portions 25 having B-shaped pipe-inserting holes 24 are integrally joined in a T-shape. A connection structure with a double pipe 28 composed of two resin-coated steel pipes 27 that can be inserted into the pipe insertion holes 24, and a resin joint formed by injection molding an engineering plastic like the corner joint 2 described above. In the curved wall of the pipe insertion tubular portion 25 of 26, two bolt insertion holes 29 into which bolts for fixing the double pipe 28 are inserted are located at the middle of the height as will be described later, and are appropriately arranged in the longitudinal direction. It is provided separately.

The double pipe 28 inserted into the pipe insertion tubular portion 25 has a length at least equal to the depth (including the length) of the pipe insertion hole 24 and the pipe insertion tubular portion 25.
The end face trapezoidal rod-shaped nut 31 having the screw hole 30 corresponding to the bolt insertion hole 29 of No. 2 is locked so as to straddle a part of the outer peripheries of both resin-coated steel pipes 27, 27 of the double pipe 28. Then, the pipe is inserted into the pipe insertion hole 24 by being positioned on the straight wall side of the pipe insertion tubular portion 25, and the bolt 32 inserted from the bolt insertion hole 29 is screwed into the screw hole 30 so that the resin joint 26 can be disassembled. It is connected.

The nut for fixing the double pipe 28 to the resin joint 26 in cooperation with the bolt 32 is not limited to the end face trapezoidal rod-shaped nut 31 described above, and for example, as shown in FIG. An end gull wing-shaped locking portion 33 having a length equivalent to the depth of 24 and a bolt insertion hole 29 of the pipe insertion tubular portion 25 are provided at the center of the locking portion 33 so as to project, and a screw hole 34 is provided. The plate-shaped nut 36 may be composed of the shaft portion 35 having the plate-shaped nut 36. The plate-shaped nut 36, like the rod-shaped nut 31, extends over a part of the outer circumference of both resin-coated steel pipes 27, 27 of the double pipe 28. The pipe insertion tube portion 2 so that the locking portion 33 is locked.
The bolt 3 inserted into the pipe insertion hole 24 by being positioned on the straight wall side of the bolt 5 and inserted into the screw hole 34 from the bolt insertion hole 29.
By screwing in 2, the resin joint 26 and the double pipe 28 are connected so as to be disassembled.

Further, in each of the above-mentioned embodiments, the pipe insertion tube portions 5, 7, and 25 of the resin joints 2 and 26 are formed in a U shape,
Although the case of integrally joining in a T-shape has been described, the present invention is not limited to this, and L-shaped, V-shaped, linear, or any other desired angle may be formed to integrally join a plurality of pipe insertion cylinders. Good.

[0025]

As described above, according to the first joint-pipe connection structure of the present invention, the screw hole into which the bolt is screwed is directly drilled in the double-pipe resin-coated steel pipe itself. Since there is no rust, there is no need to rust as in the past, there is no need to drill a pilot hole, and the pipe insertion hole can be inserted only when the plate nut is positioned on the straight wall side of the pipe insertion cylinder. Since it is possible to insert a double pipe into it, even an unfamiliar person can easily and accurately perform the connecting work.

According to the connection structure of the second joint and the pipe, as in the connection structure of the first joint and the pipe, the screw hole into which the bolt is screwed is directly connected to the double-pipe resin-coated steel pipe itself. Since no holes are drilled, rust will not occur, and there is no need to drill holes in the pilot holes. Only when the rod-shaped or plate-shaped nut is positioned on the straight wall side of the pipe insertion tube. Since the pipe can be inserted into the pipe insertion hole, even an unfamiliar person can easily and accurately perform the connecting work.

Moreover, since the bolt for fixing the double pipe is positioned at the middle of the height of the pipe inserting cylinder portion on the curved wall side, the bolt does not project to the outside of the pipe inserting cylinder portion, which is also safe. Contribute.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of a trolley base having a joint and pipe connection structure according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a joint-pipe connecting structure according to a second embodiment of the present invention.

FIG. 3 is a perspective view of another nut of the joint-pipe connecting structure according to the second embodiment of the present invention.

[Explanation of symbols]

 2 Corner Joint 5 Depth Pipe Insertion Cylinder 6 Pipe Insertion Hole 7 Frontage Pipe Insertion Cylinder 11 Bolt Insertion Hole 14 Resin Coated Steel Pipe 15 Projection 16 Projection 17 Nut Hole 18 Locking Part 19 Shaft 20 Plate Nut 21 Screw Hole 22 Bolt 24 Pipe insertion hole 25 Pipe insertion tubular portion 26 Resin joint 27 Resin coated steel pipe 28 Double pipe 29 Bolt insertion hole 30 Screw hole 31 Rod nut 32 Bolt 33 Locking portion 34 Screw hole 35 Shaft portion 36 Plate nut

Claims (2)

[Scope of utility model registration request] 1. A resin joint in which a plurality of pipe insertion cylinders having B-shaped pipe insertion holes are integrally joined at a required angle, and two resin-coated steel pipes are integrally formed with respective coating resins. A connection structure with a double pipe that is assembled by mutually projecting ridges formed in the longitudinal direction and that can be inserted into the pipe insertion hole, and has an intermediate height between the curved wall side of the pipe insertion cylinder portion of the resin joint. While a bolt insertion hole is provided in the double pipe, a nut hole is provided in the ridge of the double pipe so as to correspond to the bolt insertion hole, and the double pipe is locked while straddling a part of the outer circumference of both resin-coated steel pipes. Also, the plate nut inserted into the nut hole is positioned on the straight wall side of the pipe insertion cylinder and inserted into the pipe insertion hole, and the bolt inserted from the bolt insertion hole is screwed into the screw hole of the plate nut. That Characteristic joint and pipe connection structure. 2. A resin joint in which a plurality of pipe insertion cylinders having B-shaped pipe insertion holes are integrally joined at a required angle, and two resin-coated steel pipes insertable into the pipe insertion holes. It has a connection structure with a double pipe consisting of, and a bolt insertion hole is provided in the middle of the height of the resin joint on the curved wall side of the pipe insertion tube, while the double pipe is inserted into the pipe insertion hole of the pipe insertion tube. One of the outer peripheries of both resin-coated steel pipes of a double pipe in which a rod-shaped or plate-shaped nut having at least a length equal to the depth of the pipe insertion hole and a screw hole corresponding to the bolt insertion hole is inserted into the pipe insertion hole. It is inserted into the straight wall side of the pipe insertion tubular part so as to be straddled over the pipe part, and the bolt inserted from the bolt insertion hole is screwed into the screw hole of the rod-shaped or plate-shaped nut. Features The joint and pipe connection structure.