JPH0325655Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to improvement of tension ribs used in table covers, bed pillows, mosquito nets, Western umbrellas, etc.

(Prior art) Generally, as tension ribs for table coverings, etc.
A structure disclosed in Japanese Patent No.-77484 and the like is known.

That is, as shown in FIG. 12, the tension rib includes a metal joint 15 having a fixing tube 15a and a holding tube 15b, a metal main rib 16 fixedly held on the fixing tube 15a, and a holding tube 15b. It is composed of a metal strut 17 which is rotatably held by the frame. or,
The joint 15 is made from a single metal plate, and by bending a part of the plate, the joint 15 is made of a single metal plate.
5a and a holding tube 15b are formed.

Thus, the strut 17 is rotatably held by the holding tube 15b of the joint 15, and the fixed tube 15a of the joint 15 is held rotatably.
By fixing and holding the main bone 16 with
The strut 17 is swingably connected to the frame.

In addition, in Fig. 12, 18 indicates a plurality of main bones 1.
19 is a lower wheel that supports one end of a plurality of struts 17 in a radial and rockable manner; 20 is a lower wheel 1;
A drawstring 21 is a cloth stretched over the main frame 16.

By the way, in the case where one end of the strut 17 is swingably connected to the substantially middle part of the main bone 16, the material of the joint 15 (plate-shaped) must be bent into an appropriate shape. Therefore, there is a problem in that the work of assembling the tension ribs becomes extremely complicated.

Furthermore, since the joint 15 is made of metal, there is a problem in that the fabric of the table cover may be damaged by burrs or the like.

Furthermore, since the entire tension frame is made of metal, there is a risk of corrosion. In particular, if the joint 15 becomes corroded, it will interfere with the folding of the tension ribs.

(Problems to be solved by the invention) The present invention was devised to solve the above-mentioned problems, and its purpose is to make assembly simple and quick, and to prevent damage to fabrics such as table covers. To provide a tension rib for a table cover, etc., which can prevent corrosion and has excellent corrosion resistance.

(Means for Solving the Problems) The tension frame of the present invention includes a main bone made of synthetic resin, and a support bone made of synthetic resin whose one end is rotatably connected to the approximate middle part of the main bone. At the connecting part, either approximately the middle part of the main bone or one end of the support bone,
A fitting hole consisting of a through hole and a notch formed continuously with the fitting hole is integrally formed, and on the other hand, a support shaft that is rotatably inserted into the through hole of the fitting hole is formed at the end thereof. A feature is that the protrusion is integrally formed with a protrusion that passes through the notch of the fitting hole and engages with the peripheral edge of the through hole.

(Function) By inserting and engaging the protrusion formed on the other side into the fitting hole formed on either the approximately middle part of the main bone or one end of the support bone, the support can be attached to the approximately middle part of the main bone. One end portion is rotatably and irremovably connected.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a front view of a tension rib 1 according to an embodiment of the present invention, and one end of the tension rib 1 is rotatably and irremovably connected to a main bone 2 and a substantially intermediate portion thereof. A fitting hole 4 is provided in either the substantially middle part of the main bone 2 or one end of the main bone 3, and a projection that is engaged with the fitting hole 4 is provided in the other side. Part 5
are each formed integrally. That is, in this embodiment, a fitting hole 4 is integrally formed approximately in the middle of the main bone 2, and a protrusion 5 is integrally formed at one end of the strut 3.

Specifically, as shown in FIGS. 2 to 4, the main rib 2 is made of flexible synthetic resin into a rod shape, and a fitting hole 4 is integrally formed approximately in the middle thereof. is formed. That is, the fitting hole 4 is connected to the connecting plate 6 which is connected to the main frame 2 in a protruding state approximately in the middle thereof.
The through hole 4a is formed in the connecting plate 6, and the notch 4b is formed continuously with the through hole 4a. In FIG. 2, 7 is a hole formed at one end of the main bone 2, and 8 is a fitting portion formed at the other end of the main bone 2.

On the other hand, as shown in FIGS. 5 and 6, the bridge 3 is made of flexible synthetic resin, and has one end that is rotatably inserted into the fitting hole 4 of the main frame 2 and cannot be detached. A protrusion 5 that is engaged with is integrally formed. That is, the protrusion 5 has a support shaft 5a formed to have a diameter smaller than the inner diameter of the through hole 4a of the fitting hole 4 and longer than the length of the through hole 4a, and the protrusion 5 is formed substantially opposite to the end of the support shaft 5a. It consists of a pair of projecting pieces 5b that are formed and can pass through the notch 4b of the fitting hole 4. The diameter of these support shafts 5a and the length of the protrusion 5b are as follows:
and one protruding piece 5b are inclined, and the fitting hole 4 is opened.
The projecting piece 5b is set so that it can be inserted into the through hole 4a together with the fitting hole 4a, and when the projecting piece 5b comes out to the opposite side of the fitting hole 4, it is latched onto the connecting plate 6 to prevent the support shaft 5a from coming off. . Moreover, the formation position of the protruding piece 5b is
Even if the tension rib 1 is used as a table cover, for example, and the stretcher 3 is rotated relative to the main bone 2 by opening and closing it, the projecting piece 5b of the stretcher 3 and the notch 4b of the main bone 2 will match. It is formed in such a position that it does not. Therefore, detachment of the strut 3 can be reliably prevented. Furthermore, in Figure 5,
9 is a hole formed in one end of the strut 3.

When connecting one end of the support bone 3 to a substantially intermediate portion of the main bone 2 in a rotatable and non-separable manner, first, the support shaft 5a of the protrusion 5 and one of the protrusions 5b are fitted. The support shaft 5 is aligned with the through hole 4a of the fitting hole 4, and the other protruding piece 5b is positioned in the notch 4b of the fitting hole 4.
It is inserted into the through hole 4a with the tip a tilted. Then, the support shaft 5a and one protruding piece 5b enter the through hole 4a together, and then one protruding piece 5b exits to the opposite side of the through hole 4a.
At this time, the protruding piece 5b matching the notch 4b also passes through the notch 4b and comes out to the opposite side (see FIGS. 7 and 8). When the strut 3 is rotated in this state, each protruding piece 5b is hooked to the connecting plate 6 (see FIGS. 9 and 10). Therefore,
One end portion of the support bone 3 is rotatably and irremovably connected to a substantially intermediate portion of the main bone 2 .

FIG. 11 is a schematic front view of a table cover using the tension rib 1, in which reference numeral 10 denotes a top wheel which pivots one end of the main bone 2 of the tension rib 1 in a radial and swingable manner;
12 is a string that pulls up the lower wheel 11; 13 is a mesh cloth stretched over the main bone 2; 14 is a net cloth stretched over the main bone 2; This is a hanging body that is fitted into the fitting part 8 of the net cloth 13 to hang the net cloth 13 thereon.

In the above embodiment, the fitting hole 4 is provided in the main frame 2.
Although the protrusions 5 were integrally formed on the struts 3,
In another embodiment, a fitting hole 4 may be formed in the strut 3, and a protrusion 5 that engages with the fitting hole 4 may be formed in the main bone 2.

Further, the shape and structure of the fitting part 4 and the protrusion 5 are not limited to those of the above embodiment, and are formed integrally with the main bone 2 and the support bone 3, and are formed at approximately the middle part of the main bone 2. The shape and structure are arbitrary as long as one end of the strut 3 can be rotatably and irremovably connected to the strut 3.

Further, in the above embodiment, the tension ribs 1 were used as a table cover, but it goes without saying that they may also be used as pillows, mosquito nets, Western umbrellas, etc.

(Effects of the invention) As described above, the tension rib of the present invention has a fitting hole integrally formed in either the substantially middle part of the main bone or the support bone, and a fitting hole that is rotatably inserted into the fitting hole in the other. Since the protrusions that are irremovably engaged are integrally formed, the tension ribs can be assembled by simply engaging the protrusions into the fitting holes, and metal joints can be used as with conventional tension ribs. Assembling the tension ribs is easier and faster than before.

In addition, since the fitting holes and protrusions are integrally formed on the main bone and the support bone, there is no need for a separate joint unlike in conventional tension ribs, and the number of parts and cost can be reduced.

Furthermore, since the entire tension frame was made of synthetic resin,
Even when this material is used for table coverings, etc., it does not damage the cloth, and it also has extremely excellent corrosion resistance.

In addition, since the connecting portion between the main bone and the bridge is also made of synthetic resin, the rotation of the bridge is extremely smooth and efficient.

[Brief explanation of the drawing]

FIG. 1 is a front view of a tensile bone according to an embodiment of the present invention;
Figure 2 is a front view of the main bones of the tension bones, Figure 3 is a plan view of the main bones of the tension bones, Figure 4 is a side view of the main bones of the tension bones, and Figure 5 is a side view of the main bones of the tension bones.
The figure is a front view of the stretcher bone, Figure 6 is a plan view of the stretcher bone, Figure 7 is an enlarged front view of the main part of the tension bone, and Figure 8 is a front view of the stretcher bone.
The figure is an enlarged plan view of the main part of the tension bone, Figure 9 is an enlarged front view of the main part of the tension bone with the bridge rotated, and Figure 10 is an enlarged longitudinal cross-sectional side view of the main part of the tension bone. Figure, 11th
The figure is a schematic front view of a dining table cover using stretch bones.
FIG. 2 is a schematic front view of a conventional dining table cover using tension ribs. 2 is the main bone, 3 is the bridge, 4 is the fitting hole, and 5 is the protrusion.

Claims (1)

[Scope of utility model registration request] At the connecting portion between the main bone 2 made of synthetic resin and the support bone 3 made of synthetic resin, one end of which is rotatably connected to the substantially middle part of the main bone 2, approximately the middle of the main bone 2 is connected. A fitting hole 4 consisting of a through hole 4a and a notch 4b continuously formed in the through hole 4a is integrally formed on either one of the end portions of the fitting hole 4 or the end portion of the strut 3, and A support shaft 5a rotatably inserted into the through hole 4a
and a protrusion 5b formed at the end thereof, which passes through the notch 4b of the fitting hole 4 and engages with the peripheral edge of the through hole 4a. Tough ribs for table coverings, etc.