JPH0734574Y2 - Stilts such as table covers and umbrellas - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a stretched bone used for a table cover, an umbrella, a mosquito bite, etc.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 21, a tension bone 14 used for a table cover, a rain umbrella, etc. has a connecting piece 15a at a substantially middle portion.
Main bone 15 integrally protruding from the main frame 15 and a connecting piece 15 of the main bone 15
It is composed of a skeleton 16 whose one end is rotatably connected to a. The connecting piece 15a of the main frame 15 has a through hole 15
a fitting hole 15d consisting of b and a notch 15c is formed,
A support shaft 16a that is rotatably inserted into the through hole 15b and an end portion of the support shaft 16a that is rotatably inserted into the through hole 15b and that passes through the notch 15c and is locked to the connecting piece 15a. Piece 1
A protrusion 16c composed of 6b is integrally formed (see FIGS. 22 and 23). Then, the upper end of the main bone 15 goes to the upper wheel 17, and the other end of the receiving frame 16 goes to the lower wheel 1.
8 are swingably connected to each other (actual fair 3-256).
55 publication). In addition, in FIG. 21, 17 is an upper wheel,
18 is a lower wheel, 19 is a drawstring, 20 is a net cloth, and 21 is a net cloth locking body.

[0003]

Therefore, the conventional stilts 14 having different lengths and shapes are individually selected according to the length and design of the table cover, umbrella, etc. Upholstery bones 14 having different sizes and shapes are manufactured depending on the type of table cover and the like. That is, one type of tension bone 14
Is not used at all for various kinds of table covers, and therefore, for example, when 10 kinds of table covers are manufactured, 10 kinds of tension bones 14 are manufactured. Is the reality. However, manufacturing various types of tensioned bones 14 having different lengths and shapes has many problems in terms of work efficiency and economical efficiency, and causes a problem of increasing manufacturing cost. In particular, in the synthetic resin stretched bone 14,
It is necessary to prepare a large number of expensive molds, and it is extremely difficult to reduce the manufacturing cost.

The tension bone 14 is a support shaft 1 having a relatively small diameter.
A smaller protruding piece 16b is formed on 6a, and this protruding piece 16b is formed.
Since the projecting piece 16b is deformed or destroyed when a large force is applied to the tension bone 14, the connection between the main bone 15 and the support bone 16 is facilitated. There is a problem that it comes off. Of course, the fitting hole 1 of the connecting piece 15a
When fitting the projecting portion 16c of the skeleton 16 to the 5d, the relatively small projecting piece 16b and the notch 15c must be aligned, which requires a lot of labor for connection, resulting in a problem that work efficiency is significantly reduced. there were.

The present invention was devised in order to solve the above-mentioned problems, and its purpose is to be applicable to many kinds of table covers having different sizes, thereby reducing the manufacturing cost and the main structure. The purpose of the present invention is to provide a tension bone for a dining table cover, umbrella, etc., which enables easy and strong connection between the bone and the bone.

[0006]

In order to achieve the above object, in the stretched bone according to claim 1 of the present invention, the main bone is inserted with a rod-shaped synthetic resin portion having an insertion groove formed therein. It has a rod-shaped body with one end removably inserted in the groove, and a plurality of insertion parts with fitting shafts or engaging shafts protruding to both sides at desired intervals in the synthetic resin part. An elastically deformable bifurcated receiving portion into which the insertion portion is inserted is provided at one end of the receiving rib, and the fitting portion is rotatably fitted into the fitting hole of the insertion portion. It is characterized in that a fitting hole, which is rotatably fitted to the mating shaft or the engaging shaft of the insertion portion, is formed to face each other. Further, in the stretched bone according to claim 2 of the present invention, the main bone is a rod-shaped synthetic resin portion having an insertion groove formed therein, and a rod-shaped body portion having one end detachably inserted into the insertion groove. And a plurality of elastically deformable bifurcated receiving portions having opposing fitting holes or opposing engaging shafts projecting from the synthetic resin portion at a desired interval, and An insertion portion to be inserted into the receiving portion is provided at one end of the receiving bone, and the insertion shaft is rotatably fitted to the engaging shaft rotatably fitted into the fitting hole of the receiving portion or the engaging shaft of the receiving portion. The feature is that the fitting hole to be fitted is formed.

[0007]

The main bone is formed by inserting one end of the rod-shaped body into the insertion groove of the synthetic resin portion. Also, insert the insertion part provided in the synthetic resin part into the bifurcated receiving part provided in the rib, or insert the insertion part provided in the receiving frame into the bifurcated receiving part provided in the synthetic resin part. Then, the engagement shaft formed in the receiving portion is fitted into the fitting hole formed in the insertion portion, or the engagement shaft formed in the insertion portion is fitted into the fitting hole formed in the receiving portion. A bolus is formed by rotatably connecting the and the bones. Depending on the size and shape of the dining table cover, umbrella, etc., the insertion part or the receiving part of the main bone for connecting the bones is selected, and the outer position of the selected insertion part or the receiving part (that is, , The position on the side of the rod-shaped body), the synthetic resin portion is cut. Thereby, the main bone is adjusted to an appropriate length. The length of the rod-shaped body is also adjusted by cutting a part of the rod-shaped body if necessary. Furthermore,
The length of the bone to be used is appropriately selected according to the size and shape of the table cover or the like. As a result, the stretched bone of the present invention can be applied to various kinds of table covers and the like having different sizes. Further, according to the stretched bone of the present invention, when the insertion portion is inserted into the bifurcated receiving portion, the bifurcated receiving portion is elastically deformed outward so that the engaging shaft is fitted into the fitting hole, and the main bone is And the skeleton are rotatably and irremovably connected. As a result, at the time of connecting the main bone and the skeleton, it suffices to insert the insertion portion into the bifurcated receiving part, and the connection between the main bone and the skeleton can be performed very easily and easily. However, since the pair of engaging shafts are fitted in the fitting holes when the main bone and the ribs are connected, the main bone and the ribs will not be connected even if a large force acts on the tension bone. It's not easy to come off.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic front view of a table cover using a stretched bone 1 according to the first embodiment of the present invention.
It is composed of an upper wheel 2, a lower wheel 3, a tensioned bone 1 composed of a main bone 4 and a receiving bone 5, a drawstring 6, a gripping body 7, a mesh cloth 8 and the like.

Specifically, the upper wheel 2 is made of a synthetic resin material such as polyethylene, and as shown in FIG. 2, a head 2a and a neck 2b connected to the head 2a.
A collar-shaped cover portion 2c continuously provided to the neck portion 2b, and a cylindrical portion 2d that is continuously provided to the cover portion 2c and has a vertically-oriented split groove (not shown), and is fitted to the tubular portion 2d. It is composed of a disk-shaped brim portion 2e which is attached and prevented from coming off, and in which a plurality of main bones 4 are radially and swingably connected, and an insertion hole 2f of the lower lathe 3 formed in the center portion. Collar part 2 of the upper wheel 2
As shown in FIG. 3 and FIG. 4, e-shaped cutouts 2g, which are open in the upper and lower sides, are formed at regular intervals in the peripheral edge portion. In addition, vertical facing engaging grooves 2h are formed in the facing surfaces of the cutouts 2g. That is, one of the facing surfaces of the notch 2g has a vertically oriented engagement groove 2h whose upper side is open, and the other surface has a lower side which is downwardly opened and a part thereof is engaged with the engagement groove 2h. Opposing vertical engaging grooves 2h are formed respectively. The length L of the facing portion of the engagement groove 2h is set to be substantially the same as the diameter of the engagement protrusion 4c formed on the main frame 4 described later.

The lower wheel 3 is made of a synthetic resin material such as polyethylene, and as shown in FIGS. 5 and 6, a shaft portion 3a which can be inserted into the insertion hole 2f of the upper wheel 2,
An elastic locking piece 3b, which is internally mounted on the upper portion of the shaft portion 3a so as to be capable of projecting outward and is detachable from the head portion 2a of the upper wheel 2, and the shaft portion 3a
And a plurality of skeletons 5 are connected to the lower end of the disk and are formed in a disk-shaped brim portion 3c which is connected in a radial and swingable manner. In addition, the collar portion 2c of the upper wheel 2 is attached to the periphery of the collar portion 3c of the lower wheel 3.
The notch 2d and the engaging groove 2e which are the same as the notch 2g and the engaging groove 2h formed in the above are respectively formed.

On the other hand, the tensioned bone 1 according to the first embodiment of the present invention.
As shown in FIG. 7, the main bone 4 is composed of a main bone 4 and a receiving bone 5 whose one end is rotatably and irremovably connected to a substantially middle portion of the main bone 4, and the main bone 4 has a rod shape. It is composed of a synthetic resin portion 4'and an elongated rod-shaped body portion 4 ".

Specifically, the synthetic resin portion 4'of the main bone 4 is
As shown in FIG. 9 and FIG. 10, the resin is integrally molded of a flexible synthetic resin material such as ABS resin or polyethylene. The individual plate-shaped insertion portions 9 are integrally provided so as to project upward. As shown in FIG. 11, a fitting hole 10 and a tapered surface 11 are formed in the insertion portion 9, respectively. On the upper surface of the synthetic resin portion 4 ', an insertion groove 4a into which one end of the rod-shaped body portion 4 "is detachably fitted is formed along the longitudinal direction, and the rod-shaped body portion 4" is inserted into the insertion groove ad. One end of the is inserted detachably. Further, a substantially square shaft-shaped insertion portion 4b which is rotatably and swingably inserted into the notch 2g of the upper wheel 2 is integrally formed on the upper end of the synthetic resin portion 4 '. The insertion portion 4b is inserted into the notch 2g of the upper wheel 2 together with the insertion portion 4b, and is fitted into each engagement groove 2h by the rotation of the insertion portion 4b so as to be rotatable on the inner surface of the engagement groove 2h. The shaft-shaped engagement protrusion 4c engaged with the is formed symmetrically and integrally. Since the insertion groove 4a and the fitting hole 10 of the synthetic resin portion 4'are opened vertically as shown in FIG. 10, the mold can be removed vertically. As a result, only one mold is required,
The manufacturing cost can be reduced. On the other hand, the rod-shaped body portion 4 ″
Is formed of a metal wire rod having an appropriate thickness, such as a steel rod, and one end of which is an insertion groove 4a of the synthetic resin portion 4 '.
It is removably inserted inside. The thickness t and the width W of the insertion portion 4b are set to be slightly smaller than the width of the cutout 2g of the upper wheel 2 and the length of the insertion portion 4b is set to be substantially the same as the depth length of the cutout 2g. . Also, the engaging protrusion 4c
Is approximately the same as the depth of the engaging groove 2h, and the engaging protrusion 4c
The diameter of each is set to be slightly smaller than the width of the engaging groove 2h.

As shown in FIGS. 12 and 14, the receiving frame 5 is integrally formed of a flexible synthetic resin material such as ABS resin or polyethylene, and the insertion portion 9 is inserted at one end thereof. An elastically deformable bifurcated receiving portion 12 is integrally formed. Further, an engagement shaft 13 rotatably fitted in the fitting hole 10 of the insertion portion 9 is formed on the inner surface side of the receiving portion 12 so as to face it. Further, at the other end of the skeleton 5, an insertion portion 5a and an engagement projection 5b which are the same as the insertion portion 4b and the engagement projection 4c formed at the upper end of the main bone 4 are formed, respectively. The distance W ₁ between the inner surfaces of the receiving portion 12 is slightly larger than the thickness of the insertion portion 9, and the distance W ₂ between the engaging shafts 13 is
The thickness is set smaller than the thickness of the insertion portion 9, respectively.

When using the stretched bone 1, the insertion portion 9 to be used is selected according to the size of the table cover and the synthetic resin portion 4'of the main bone 4 is cut at an appropriate position. To adjust its length dimension. For example, when the table cover is large, as shown in FIG.
Is used to rotatably connect one end of the skeleton 5 to this.
That is, the insertion portion 9 at the right end is inserted into the bifurcated receiving portion 12 of the rib 5. Then, the receiving portion 12 is elastically deformed outward and the engagement shaft 13 is fitted into the fitting hole 10 of the insertion portion 9. As a result, one end portion of the support bone 5 is rotatably and irremovably connected to the main bone 4. When inserting the insertion portion 9 into the receiving portion 12, since the insertion portion 9 has the tapered surface 11, the insertion portion 9 can be easily and easily inserted into the receiving portion 12. Further, when the table cover or the like is of a medium size, the insert frame 9 in the middle is used to connect the skeletons 5, and the synthetic resin part 4 ′ is connected to the line L ₁ if necessary.
Cut near. Similarly, if the table cover or the like is small performs connection of struts 5 with the left edge of the insertion portion 9, the synthetic resin portion 4 'is cut in the vicinity of the line L ₂ as necessary. The unused insertion portion 9 may be cut so as not to get in the way, or may be left as it is.

As described above, by changing the insertion portion 9 used to connect the skeletons 5, one type of main bone 4 is used,
It is possible to manufacture table covers and the like having different sizes and dimensions corresponding to the number of the insertion portions 9. Further, when connecting the main frame 4 and the support frame 5, it suffices to insert the insertion part 9 into the bifurcated receiving part 12, so that the main frame 4 and the support frame 5 can be connected very easily and easily. However, since the pair of engagement shafts 13 are fitted in the fitting holes 10 when the main bones 4 and the receiving ribs 5 are connected, even if a large external force acts on the tension bones 1, It cannot be said that the connection with the skeleton 5 is easily released. Although the length of the rod-shaped body 4 ″ is constant in the above embodiment, it is needless to say that the length may be changed appropriately. The same applies to the same, and it goes without saying that the length dimension may be appropriately changed depending on the curved shape of the synthetic resin portion 4'and the degree of flexibility of the skeleton 5.

Next, the case where the main bone 4 and the support bone 5 are connected to the upper wheel 2 and the lower wheel 3 will be described. First,
Inserting the insertion portions 4b and 5a of the main bone 4 and the rib 5 into the notches 2g and 3d of the upper wheel 2 and the lower wheel 3 respectively, with the engaging projections 4c and 5b facing up and down as shown in FIG. Then, each bone 4 and 5 is rotated 90 ° in a predetermined direction.
Then, the engagement protrusions 4c and 5b are fitted into the engagement grooves 2h and 3e as shown in FIG. 16, and are rotatably engaged with the inner surfaces of the engagement grooves 2h and 3e. As a result, the main bones 4 and the ribs 5 are formed on the brim portion 2 of the upper wheel 2 and the lower wheel 3.
It will be connected to e and 3c so as to be swingable and non-disengageable.

As described above, when the upper wheel 2 and the lower wheel 3 are connected to the main bone 4 and the rib 5, the insertion portions 4b and 5a formed at one end of the main bone 4 and the rib 5 are connected to the upper wheel 2 and Notches 2g and 3d formed in the collar portions 2e and 3c of the lowering wheel 3
The main bone 4 and the skeleton 5 are connected to the collar portions 2e, 3c of the upper and lower potter's wheel 2 and the lower potter's wheel 3 so as to be swingable and non-detachable by simply inserting each into the inside and rotating the inserting portions 4b and 5a. Therefore, the connection between the potter's wheel 2 and 3 and the tension bone 1 can be performed very easily and easily. The main bones 4 and the ribs 5 are connected to the collar portions 2e and 3c of the upper and lower wheels 2 and 3, respectively, and one end of the ribs 5 is swingably connected to the substantially middle portion of the main bones 4. Therefore, rotation of each bone is prevented after assembly. Naturally, the engaging projections 4c and 5b formed symmetrically on the insertion portions 4b and 5a are fitted into the engaging grooves 2h and 3e formed on the facing surfaces of the cutouts 2g and 3d, respectively. Since it is engaged with the inner surface of 3e, the insertion portion 4b,
It cannot be said that 5a moves up and down and front and back in the notches 2g and 3d. As a result, it is possible to reliably prevent the main bone 4 and the receiving bone 5 from coming off from the collar portions 2e, 3c of the upper and lower wheels 2 and 3.

FIG. 18 is a tension bone 1 according to a second embodiment of the present invention.
In the tensioned bone 1, a plate-shaped insertion portion 9 having engaging shafts 13 projecting to both sides with a certain space provided on the upper surface of the synthetic resin portion 4 ′ of the main bone 4. A plurality of protrusions are provided, and an elastically deformable bifurcated receiving portion 12 into which the inserting portion 9 is inserted is provided at one end of the receiving bone 5, and the engaging shaft 13 of the inserting portion 9 is attached to the receiving portion 12. Fitting holes 10 that are rotatably fitted are formed to face each other. The rest of the structure of the stretched bone 1 is the same as that of the first embodiment, and the stretched bone 1 can also achieve the same operational effect as that of the first embodiment.

FIG. 19 is a tension bone 1 according to a third embodiment of the present invention.
In the tensioned bone 1, an elastically deformable bifurcated shape having opposing fitting holes 10 on the upper surface of the synthetic resin portion 4 ′ of the main bone 4 with a certain space. A plurality of receiving portions 12 are provided in a protruding manner, and a plate-shaped insertion portion 9 to be inserted into the receiving portion 12 is provided at one end of the receiving bone 5, and the insertion portion 9 is rotatable in the fitting hole 10 of the receiving portion 12. To form an engaging shaft 13 that is fitted to the. The rest of the structure of the stretched bone 1 is the same as that of the first embodiment. This stretched bone 1 is also the first
The same effect as that of the embodiment can be obtained.

FIG. 20 is a tension bone 1 according to a fourth embodiment of the present invention.
In the tensioned bone 1, an elastically deformable bifurcated shape having engaging shafts 13 facing each other on the upper surface of the synthetic resin portion 4 ′ of the main bone 4 with a constant gap. A plurality of receiving portions 12 are provided to project, and a plate-like insertion portion 9 to be inserted into the receiving portion 12 is provided at one end of the receiving bone 5, and the engaging shaft 13 of the receiving portion 12 is rotatable in the insertion portion 9. Is formed with a fitting hole 10. The rest of the structure of the stretched bone 1 is the same as that of the first embodiment. This stretched bone 1 is also the first
The same effect as that of the embodiment can be obtained.

In the above-mentioned embodiment, the stretched bone 1 of the present invention was used as a table cover, but in another embodiment, the stretched bone 1 of the present invention is also used for a rain umbrella, a mosquito net or the like. good.

In the above embodiment, four notches 2g and 3d are formed in the upper wheel 2 and the lower wheel 3, respectively, but in other embodiments, the notch 2 is formed in the upper wheel 2 and the lower wheel 3.
It is also possible to form five or more g and 3d.

In the above embodiment, only the collar portion 2e of the upper wheel 2 is a separate body, but in other embodiments, the upper wheel 2 may be integrally formed.

In the first embodiment, three insert portions 9 are formed on the upper surface of the synthetic resin portion 4 ', but the number of insert portions 9 is not limited to that in the above embodiment. It is optional.

In the above embodiment, the insertion groove 4a is formed on the upper surface side of the synthetic resin portion 4 ', but in other embodiments, the insertion groove 4a is formed on the side surface or the central portion of the synthetic resin portion 4'. Groove 4
Alternatively, a may be formed.

In the above-mentioned embodiment, the rod-shaped body portion 4 "is formed of a steel rod, but in other embodiments, the rod-shaped body portion 4" is formed of another metal material, synthetic resin material or carbon fiber. You may make it formed by the etc.

In the above embodiment, the rib 5 is formed in a split chopstick shape, but in another embodiment, the rib 5 may be formed in a rod shape or a plate shape.

In the above embodiment, the main bone 4 and the ribs 5 are
The insertion portions 4b, 5a and the engagement protrusions 4c, 5b are integrally formed at the ends of the, but in another embodiment, the insertion portions 4b, 5a and the engagement protrusions 4c, 5b are formed separately. However, this may be fixed to the end portions of the main bone 4 and the ribs 5.

[0029]

As described above, according to the present invention, the main bone forming the stretched bone is formed of the elongated synthetic resin portion and the rod-shaped body portion, and the synthetic resin portion has a plurality of insertion portions for connecting the ribs. Alternatively, the receiving portions are arranged at an appropriate pitch. As a result, according to the outer dimensions of the table cover, umbrella, etc., while appropriately selecting the insertion part or the receiving part for rotatably connecting one end of the skeleton from the plurality of insertion parts or the receiving part,
By cutting the synthetic resin part and the rod-shaped part at appropriate places as needed, it is possible to manufacture many kinds of table covers with different sizes and shapes even with one type of main bone. The cost can be significantly reduced. Further, in the present invention, a fitting hole or an engaging shaft is formed in the insertion portion, and the elastically deformable bifurcated receiving portion into which the insertion portion is inserted is fitted into the fitting hole or the engaging shaft of the insertion portion. Since the engaging shaft or the fitting hole is formed, when the insertion part is inserted into the bifurcated receiving part, the bifurcated receiving part elastically deforms outward and engages the fitting hole. The shaft is fitted and the main frame and the skeleton are rotatably and irremovably connected. As a result, at the time of connecting the main bone and the skeleton, it suffices to insert the insertion portion into the bifurcated receiving part, and the connection between the main bone and the skeleton can be performed very easily and easily. However, since the pair of engagement shafts are fitted in the fitting holes when the insertion portion and the receiving portion are connected, the main bone and the receiving bone can be connected even if a large external force acts on the tension bone. It's not easy to come off.

[Brief description of drawings]

FIG. 1 is a partially omitted front view showing a folded state of a dining table cover using a stretched bone according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the upper wheel.

FIG. 3 is a plan view of a collar portion of the upper wheel.

FIG. 4 is a partially cutaway front view of the collar portion.

FIG. 5 is a partially cutaway front view of the lower wheel.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a side view of a stretched bone according to the first embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view taken along the line BB of FIG.

FIG. 9 is a plan view of a synthetic resin portion forming the main bone.

FIG. 10 is a vertical sectional view of a synthetic resin portion.

11 is an enlarged cross-sectional view taken along the line CC of FIG.

FIG. 12 is a plan view of a bone.

FIG. 13 is a vertical cross-sectional view of a bone.

FIG. 14 is an enlarged cross-sectional view taken along line DD of FIG.

FIG. 15 is a partial plan view showing a connecting portion between a main bone (bone receiving) and an upper wheel (lower wheel), in which an insertion portion is inserted into a notch.

FIG. 16 is a partial plan view showing the connecting portion between the main bone (bone receiving) and the upper wheel (lower wheel), with the insertion section rotated.

17 is a cross-sectional view taken along the line EE of FIG.

FIG. 18 is a plan view showing a part of the stretched bone according to the second embodiment of the present invention and showing a state in which the main bone and the ribs are separated.

FIG. 19 is a plan view showing a part of a stretched bone according to a third embodiment of the present invention and showing a state in which a main bone and a rib are separated.

FIG. 20 is a plan view showing a part of a stretched bone according to a fourth embodiment of the present invention and showing a state in which a main bone and a rib are separated.

FIG. 21 is a partially omitted front view of a table cover using a conventional stretched bone.

FIG. 22 is a partially enlarged side view showing a connecting portion between a main bone and a bone of a conventional tension bone.

FIG. 23 is a partially enlarged plan view showing a connecting portion between a main bone and a rib of a conventional tension bone.

[Explanation of symbols]

Reference numeral 1 is a tension bone, 4 is a main bone, 4'is a synthetic resin portion, 4 "is a rod-shaped body portion, 9 is an insertion portion, 10 is a fitting hole, 4a is an insertion groove, 5 is a rib, 12 is a receiving portion, 13 is an engaging shaft.

Claims (2)

[Scope of utility model registration request] 1. A stretcher such as a table cover or rain umbrella comprising a main bone (4) and a bone (5) whose one end is rotatably connected to a substantially middle portion of the main bone (4). The main frame (4) is a rod-shaped synthetic resin portion (4 ') having an insertion groove (4a), and a rod-shaped body portion (4 ") having one end detachably inserted into the insertion groove (4a). And a plurality of insertion portions (9) having fitting holes (10) or engagement shafts (13) protruding to both sides at desired intervals in the synthetic resin portion (4 '). Further, an elastically deformable bifurcated receiving part (12) into which the inserting part (9) is inserted is provided at one end of the receiving frame (5), and the inserting part (9) is attached to the receiving part (12). ) Fitting hole (1
The engaging shaft (13) that is rotatably fitted to the connector (0) or the engaging hole (10) that is rotatably fitted to the engaging shaft (13) of the insertion portion (9) is formed to face each other. Bone bones such as table covers and umbrellas. 2. A tension bone, such as a table cover or a rain umbrella, comprising a main bone (4) and a support bone (5) having one end rotatably connected to a substantially middle portion of the main bone (4). The main frame (4) is a rod-shaped synthetic resin portion (4 ') having an insertion groove (4a), and a rod-shaped body portion (4 ") having one end detachably inserted into the insertion groove (4a). And an elastically deformable bifurcated receiver having a facing fitting hole (10) or a facing engaging shaft (13) at a desired interval in the synthetic resin portion (4 '). A plurality of parts (12) are provided to project, and an insertion part (9) to be inserted into the receiving part (12) is provided at one end of the receiving frame (5), and the receiving part (9) is provided in the inserting part (9). 12) Fitting hole (1
0) to be rotatably fitted to the engaging shaft (13) or the receiving portion (12) of the engaging shaft (13) to be rotatably fitted into the fitting hole (10). Stilts such as table covers and umbrellas.