JPH051688Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is for mutually fixing columns, leg members, and connecting rods that constitute a support leg device that supports a bulletin board and makes it available for use. It is related to the structure of

In this invention, bulletin boards include blackboards, whiteboards, etc.
This is a general term for plate-like members that can be written and erased as shown in the following.

[Conventional technology]

The basic structure of this type of support leg device is (a) a pair of rod-shaped legs placed on the floor, (b) a pair of vertical supports erected on the above pair of legs, and ( c) It consists of a connecting rod installed horizontally between the pair of pillars, and the connecting portions of these rod-like members are butted against each other in a T-shape and fixed to each other.

[The problem that the idea attempts to solve]

Conventionally, the above-mentioned connections have generally been welded or bolted together, making it difficult to change the connection position.

Of course, if it is welded, it cannot be attached or detached, but if it is bolted, it is not impossible if tap holes are provided at multiple locations. However, if a structure in which the connection position is changed in this way is used, () At least two bolts must be attached and detached in order to move one connection part, which requires a great deal of labor and time.

() Connections are limited to predetermined positions.

() Unused tap holes appear on the outside and reduce the product value.

This idea was created in view of the above circumstances.
Regarding the T-shaped connection of the rod-like members that make up the bulletin board support leg device () Only one bolt is needed to move one connection, and it is not just a matter of tightening and loosening. () The connection fixing location is not limited and can be fixed at any position within a certain range, and () The tap hole (or bolt through hole) does not appear externally. purpose.

[Means to solve the problem]

FIG. 3 is an explanatory diagram drawn to help understand the principle of the present invention (a part of essential requirements is missing, and the embodiment is incomplete).

Figuratively, assume a member 1 that is a divided T-joint for PVC piping. 1a and 1b are respective divided pieces.

The divided pieces 1a and 1b are hinged with lines a and b serving as rotation axes. Although the pipes 2 to be butted are shown cut, they extend in the direction of arrow c.

On the other hand, the tube 3 to be abutted is abutted against the tube 2 at right angles as shown by the arrow d.

The divided piece 1b of the T-joint 1 is rotated around the axis a-b as shown by the arrow e, and both the tubes 2 and 3 are sandwiched, and the bolt 4 is inserted and tightened.

5 is a hole with a larger diameter than the bolt 4, and the dividing piece 1
A truncated conical bearing boss-shaped projection 6 provided on a and 1b
a and 6b fit into this.

Although not shown in FIG. 3, the divided pieces 1a,
The hinge of 1b is not made by using a hinge, but by a half-cylindrical adapter provided with an engaging portion, and the adapter is sandwiched between the T-joint and the pipe 2.

[Effect]

According to the above-mentioned structure, it is not necessary to process tap holes or bolt holes in the pipes 2 to be butted together, and moreover, the pipes 3 can be butted against each other at any arbitrary position and tightened and fixed. Furthermore, the above-mentioned tightening can be performed with a single bolt (a nut may also be used).

〔Example〕

FIG. 1 shows an embodiment of the present invention.

2' is a tube to be butted against, specifically a leg member of a support leg device or a strut.

3' is a pipe to be matched, specifically a support or a connecting rod.

When carrying out the present invention, these tubes 2', 3' are configured to have a circular or elliptical cross-sectional shape. These shapes and dimensions may or may not be equal to each other.

The tubes 2' and 3' of this example are shaped so that their cross sections are ellipsoids of the same shape and size. In the present invention, the term elliptical includes shapes similar to an ellipse.

The adapter 8 is formed into a half-tube shape that fits into the pipe 2', and has a structure in which the outside is tightened with a pair of split pieces 7a and 7b.

The above adapter 8 has concave surfaces 8 _a-1 and 8 _a for engagement.
_-2 protrusions 8a are provided in succession.

The lower edges of the pair of divided pieces 7a, 7b engage with the concave surfaces 8a _-1 , _8a-2 , respectively, and act as if they were hinged.

Frame-conical bearing boss-shaped projections 7 a-1 and 7 b _-1 are provided at the portions where the tube 3 is sandwiched between the divided pieces 7 _a and 7 b,
Holes 3a and 3b are provided in the corresponding positions of the pipe 3', and the holes 3a and 3b are fitted together.

9a is a tightening bolt, and 9b is a nut.

The truncated conical projections 7 _a-1 and 7 _b-1 are the holes 3 a and 3
Since the tube 3' is press-fitted into the tube 3', the tube 3' is positioned and held without play.

Projections 8b and 8c projecting outward are provided on both sides of the half-cylindrical adapter 8, and the projections are tapered in a direction to reduce the width of the tip. It has been done. Tapered grooves are provided on the inner surfaces of the divided pieces 7a, 7b so as to correspond to the protrusions 8b, 8c.

When the pair of divided pieces 7a, 7b are tightened with the bolt 9a and nut 9b, the divided pieces 7a, 7b firmly clamp the tube 2' without play due to the taper action described above.

FIG. 2 shows a partially cutaway view of the divided piece 7a and the tube 3' as seen in the direction of the arrow.

The divided piece 7a is provided with a wedge-shaped tongue piece 7a _-2 . Thus, the gap 7 is opened so that the tongue piece of the mating piece 7b can be inserted.
_A-3 will be provided. Divided piece 7b whose position is indicated by a virtual line
A similar tongue piece and a gap are also provided for mutual engagement.

When tightened in the directions of arrows P ₁ and P ₂ , the wedge-shaped tongue pieces 7 _a-2 and 7 _a-2 ′ sandwich the tube 3 ′ in the left-right direction in the figure, and the pair of divided pieces 7 a and 7 b are further tightened. Holds the tube 3' firmly without play.

In this embodiment, the tube 2' can be fixed or slid relative to the tube 3' by simply tightening or loosening one bolt 9a, and the tube 2' has tap holes, etc. No processing required.
Therefore, there is no risk of damaging the appearance of the tube 2'.

[Effect of idea]

According to the tubular member mutual fixing structure of the present invention, () the connection points can be fixed or slid by simply tightening or loosening one bolt per connection point; It can be fixed at any location within the slidable range without being limited to any location, and (2) has an excellent practical effect in that the tap holes and bolt holes for connections are not visible, so the appearance will not be damaged. .

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention;
FIG. 2 is a view in the direction of the arrow. FIG. 3 is an exploded perspective view cut away to explain the principle of the present invention. 2, 2'... Pipe to be butted, 3, 3'... Pipe to be matched, 3a, 3b... Hole, 7... Connector, 7a, 7b... Divided piece, 7 _a-1 , 7 _{b- 1} ...Protrusion, 7 _a-2 ...Wedge-shaped tongue piece, 7 _a-3 ...Gap, 8...
...Adapter, 8a...Protrusion, 8a _-1 , _8a-2 ...Concave surface, 8b, 8c...Protrusion.

Claims (1)

[Claims for Utility Model Registration] 1 (a) The ends of the columns are butted at right angles to the leg members that constitute the support legs of the bulletin board, and
In a structure in which the end of the connecting rod is abutted against the support at right angles and the abutted portions are fixed to each other, (b) the leg member, the support and the connection rod are connected by a circular or oval tube-shaped member. (c) a half-cylindrical adapter that is in close contact with a half circumference of the outer surface of the circular or elliptical tubular member; (d) the above-mentioned one on the side of the tubular member to be butted that is not abutted; configuring a connecting tool that wraps at least one portion of each of the abutted tubular member, the adapter, and the abutted tubular member with the inner surfaces of the adapter brought into close contact, and (e) the abutted tubular member; (f) said adapter is divided into two parts along a plane including the center line of said adapter and the center line of said tubular member; (g) having a protrusion having a concave surface for engagement, each of the divided connectors being attached by fitting its edge into the concave surface for engagement; The half-cylindrical adapter has a protrusion extending toward the outer circumference on both edges that contact the half-split surface, and each of the split connectors has a protrusion extending toward the outer circumferential side. (h) near the end of the tubular member on the abutting side;
A pair of holes are provided along a line passing through the center line and perpendicular to the center line, and a truncated conical protrusion that fits into the hole is provided on the inner surface of each of the divided connectors, (i) A through hole is provided along the center line of the pair of truncated conical projections, and a bolt is inserted into the through hole, and the tubular members on the abutted sides are sandwiched between the two divided connectors. (j) A tongue piece is made to protrude from one of the divided and opposing surfaces of the portion where the tubular member on the abutted side is sandwiched, and the tip of the tongue piece is attached to the other side. A structure for mutually fixing tubular members of a bulletin board support leg device, characterized in that the tubular members are wedge-shaped sandwiched between the connector and the tubular member. 2 The side surface of the protrusion in item (g) above is tapered in the direction of reducing the width of its tip, and the groove in item (g) above is a tapered surface corresponding to the taper described above. A structure for mutually fixing tubular members of a bulletin board support leg device as set forth in claim 1 of the utility model registration claim, characterized in that the structure has the following features: