JP3188903U - umbrella - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sturdy umbrella capable of more reliably preventing plastic deformation and breakage of an umbrella bone such as a rib even when it receives a strong wind. SOLUTION: A plurality of ribs 19 and a plurality of ribs 20 are provided, and a tip portion of the ribs 20 and an intermediate portion of the ribs 19 are freely folded back and forth with respect to the ribs 20. It is an umbrella in which the ribs 19 in an open state are supported by the connecting bones 23 in a folded state from below, which are connected by the connecting bones 23, respectively. The rib 19 is formed in a rod shape by an elastic synthetic resin, and the connecting bone 23 is provided with a regulating portion 44 located below the rib 19 to regulate the downward elastic deformation of the rib 19. The regulating portion 44 is formed to be wider than the thickness of the portion of the rib 19 corresponding to the regulating portion 44. [Selection diagram] Fig. 1

Description

  The present invention relates to an umbrella that prevents the umbrella bones such as the main bone and the ribs from breaking even when subjected to a strong wind.

  For umbrellas whose main bones are flipped upwards even when subjected to strong winds so that the bones such as the main bones and the bones are not broken, one end is pivotally attached to the upper rocker fixed to the tip of the center rod, and the umbrella is opened and closed. A main bone of a book, and a plurality of bones with a proximal end pivotally attached to a lower lokuro that is slidably fitted to the middle rod and a distal end side extending radially toward an intermediate portion of the parent bone, And the middle part of the master bone are connected by connecting bones that can be folded up and down with respect to the receiving bone, respectively, so that the folded back connected bone supports the master bone from below. There is what I did.

  In this type of conventional umbrella, the main bone is formed in a U-shaped cross section by bending a long strip-shaped metal plate along the longitudinal direction (for example, Patent Document 1).

Utility Model Registration No. 3070941

In the conventional case, the main bone is formed in a U-shaped cross section by a metal plate, so it lacks elasticity. Therefore, countermeasures against strong wind are still insufficient, and the main bone is on the upper side when the umbrella receives strong wind. If the head bone is largely reversed or if the leading end side of the parent bone is bent downward, the parent bone is likely to be plastically deformed or damaged.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a sturdy umbrella that can more reliably prevent plastic deformation and breakage of an umbrella bone such as a main bone even under strong wind.

Specific means for solving the problems in the present invention are as follows.
The technical means of the present invention for solving this technical problem is that a plurality of main bones 19 that are pivoted at one end to an upper rocker 4 fixed to the tip of the middle rod 3 and opened and closed, and slide on the middle rod 3 A base end is pivotally attached to the lower rocker 5 that is freely fitted, and a distal end side is provided with a plurality of receiving bones 20 extending radially toward an intermediate portion of the main bone 19, and the distal end portion of the receiving bone 20 and the intermediate portion of the main bone 19 Are connected by connecting bones 23 that can be folded up and down with respect to the receiving bone 20, and the open main bone 19 is supported from below by the connecting bone 23 that is folded back. An umbrella,
The main bone 19 is formed in a rod shape with an elastic synthetic resin, and the connecting bone 23 is provided with a restriction portion 44 that is located below the parent bone 19 and restricts elastic deformation downward of the parent bone 19. This is because the width of the portion corresponding to the restricting portion 44 of the main bone 19 is wider.

Further, another technical means of the present invention is that a thick bone connecting portion 31 is integrally formed in the middle portion of the main bone 19 and a connecting plate portion 32 protruding downward from the bone thick connecting portion 31 is integrally formed. The connecting plate portion 32 is connected to one end side of the connecting bone 23 so as to be swingable about the pivot shaft 48.
Another technical means of the present invention is that the connecting bone 23 is formed in a U-shaped cross section having a pair of side walls 41 and an upper connecting wall 42 for connecting the upper ends of the pair of side walls 41. The connecting wall 42 serves as the restricting portion 44 that receives the main bone 19 from the lower side, and a pair of side wall 41 protrudes outward in the longitudinal direction from the upper connecting wall 42 on one end side of the connecting bone 23. 47 is provided, and the pair of connecting projections 47 are arranged so as to sandwich the connecting plate portion 32 in the thickness direction, and are connected to the connecting plate portion 32 so as to be swingable around the pivot shaft 48. .

In addition, another technical means of the present invention is that the other end side of the connecting bone 23 is formed wider than the one end side so that the width of the restricting portion 44 is widened, and a pair of side walls is provided on the other end side of the connecting bone 23. A pair of connecting projections 50 are provided in which 41 protrudes outward in the longitudinal direction from the upper connecting wall 42, and the pair of connecting projections 5.
No. 0 is arranged so as to sandwich the distal end portion of the receiving bone 20 in the thickness direction, and is connected to the distal end portion of the receiving bone 20 so as to be swingable around the pivot shaft 51.

Further, according to another technical means of the present invention, a pair of connecting plate portions 32 protrudes downward from the thick connecting portion 31 of the main bone 19, and can be inserted between the pair of connecting plate portions 32 on one end side of the connecting bone 23. The connecting protrusion 47 is disposed between the pair of connecting plates 32 and is connected to the pair of connecting plates 32 so as to be swingable around the first pivot shaft 48. In the point.
Another technical means of the present invention is that the connecting bone 23 is formed in a U-shaped cross section having a pair of side walls 41 and a lower connecting wall 59 that connects the lower ends of the pair of side walls 41. The pair of side walls 41 and the lower connecting wall 59 is the restriction portion 44 that is received from the lower side so as to fit the main bone 19 therein.

  According to the present invention, since the parent bone is formed in a rod shape by the synthetic resin having elasticity, if the strong wind is received when the umbrella is opened, the connecting bone is raised and rotated with respect to the rib. With the degree of elastic deformation slightly upward, the main bone warps upward largely due to elastic deformation. The force does not act, and the parent bone, the receiving bone and the connecting bone can be more reliably prevented from being plastically deformed or damaged.

Then, after the main bone warps upward, the middle part of the main bone is pulled downward via the receiving bone and the connecting bone by sliding the lower loft downward with respect to the central shaft, and the main bone is warped upward. You can easily return to the original state.
In addition, since the main bone is formed in a rod shape with an elastic synthetic resin, when a strong wind is received from the upper side, the distal end side of the main bone tends to be elastically deformed downward with the intermediate portion as a fulcrum, but it is located below the main bone. Since the restriction part that regulates the elastic deformation of the lower part of the main bone is provided, the restriction part can regulate the elastic deformation of the lower part of the main bone as soon as the parent bone elastically deforms downward. And can be prevented from becoming unstable by rocking up and down.

  Moreover, since the restricting portion is formed wider than the thickness of the main bone, even if the distal end side of the main bone is elastically deformed in the horizontal direction and elastically deformed downward, the restrictive portion reliably receives the main bone that has been elastically deformed downward. The elastic deformation can be restricted, and the main bone is plastically deformed, broken, or oscillated up and down, etc., even though the main bone is formed in a rod shape with an elastic synthetic resin. Can be more reliably prevented.

It is a side view of the principal part of the umbrella which shows 1st Embodiment of this invention. It is the sectional view on the AA line of the same FIG. It is the BB sectional view taken on the line of FIG. It is a side view of the umbrella. It is a side view of the principal part of the umbrella which shows 2nd Embodiment. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is a side view of the umbrella.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of the present invention. 1 to 4, the umbrella 1 includes an intermediate rod 3, an upper rock 4 fixed to the tip of the intermediate rod 3, and a lower rocker 5 that is externally fitted to the intermediate rod 3 so as to be slidable up and down.
A bone receiving pivot 7 is provided in the upper part of the lower rocker 5, and a spring connecting portion 8 is provided below the bone receiving pivot 7, and the bone receiving pivot 7 and the spring connecting portion 8 are connected to each other. 9, and a lower cylinder portion 10 projects downward from the spring connection portion 8. An engagement hole 12 is provided in the lower cylinder portion 10 of the lower rocker 5 for releasably engaging a repellant 17 described later. A cylindrical spacer 13 is fitted and held below the upper roller 4 of the middle rod 3.

A gripping part 15 is attached to the lower part of the center bar 3, and an operation button 16 and a repelling 17 are provided above the gripping part 15, and the repelling 17 is biased so as to protrude outward from the centering bar 3 by a spring (not shown). The repelling 17 is configured to retreat into the intermediate rod 3 against the bias of the spring by pressing the operation button 16.
The base end of the umbrella 1 is pivotally attached to a plurality of (eight in the illustrated example) main bones 19 that are pivoted at one end to the upper rocker 4 and the bone receiving pivotal attachment portion 7 of the lower rocker 5. A plurality of (eight in the illustrated example) receiving bones 20 whose distal ends extend radially toward the middle part of the main bone 19 are arranged, and the umbrella cloth 22 is disposed so as to cover the plurality of main bones 19 from above. Are connected to each main bone 19 at a plurality of locations by connecting strings (not shown).

  The connecting bone 23 is connected between the distal end portion of the receiving bone 20 and the intermediate portion of the parent bone 19, and when the lower rocker 5 slides upward, the receiving bone 20 passes through the connecting bone 23 and the intermediate portion of the parent bone 19. Is pushed upward to open the main bone 19 and the connecting bone 23 is bent in a V shape (folded state) with respect to the receiving bone 20, and when the lower rocker 5 is slid downward, the receiving bone 20 pulls the connecting bone 23. The intermediate portion of the parent bone 19 is pulled downward to close the parent bone 19 and the connecting bone 23 extends with respect to the receiving bone 20.

Thus, the distal end portion of the receiving bone 20 and the intermediate portion of the main bone 19 are connected to each other by the connecting bone 23 that can be folded up and down with respect to the receiving bone 20. It is configured to be supported from below by the connecting bone 23 in a folded state.
A tension spring 25 is connected between the spring connecting portion 8 of the lower rocker 5 and the tip of the receiving bone 20. A plurality of tension springs 25 (eight in the illustrated example) are arranged below the ribs 20 along the ribs 20, and one end of the tension spring 25 is connected via a connecting line 26 made of a wire or the like. The other end of the tension spring 25 is engaged with an engagement shaft 38 provided on the distal end side of the receiving bone 20.

  Thus, the plurality of tension springs 25 constitute urging means 28 for urging the lower rocker 5 upward toward the upper rocker 4 with respect to the middle rod 3. Further, an engagement mechanism 29 that engages the lower rocker 5 with the lower part of the middle bar 3 is detachably engaged by the engagement hole 12 of the lower rocker 5 and the repelling 17 of the middle bar 3. Accordingly, when the operation button 16 is pressed, the engagement of the lower rocker 5 by the engagement mechanism 29 is released, and the lower rocker 5 is raised by the urging force of the urging means 28 so that the main bone 19 is automatically opened. The umbrella 1 is a so-called jump umbrella that automatically opens without manually sliding the lower rocker 5 upward.

Each of the main bones 19 is formed into a long and thin round bar shape with a synthetic resin having elasticity such as vinyl chloride (PVC), and a thick and thick connecting portion 31 is integrally formed at the middle portion of the main bone 19. A connecting plate portion 32 protruding downward from the portion 31 is integrally formed.
The bone thick connecting portion 31 of the main bone 19 is about twice as large as the other portion (base side or distal end side of the thick bone connecting portion 31 of the main bone 19), and the thickness of the connecting plate portion 32 is the parent bone. The thickness (diameter) of the other parts other than the 19 bone thick connecting parts 31 is approximately the same.

The rib 20 is formed in a U-shaped cross section having a pair of side walls 35 and a connecting wall 36 that connects the upper ends of the pair of side walls 35 with a metal plate, and the width between the side walls 35 of the rib 20 is the width of the parent bone 19. It is formed larger than the thickness of the portion other than the bone thick connecting portion 31. The engagement shaft 38 is inserted and held slightly proximally than the distal end portion of the receiving bone 20.
The distal end side of the tension spring 25 is housed between the side walls 35 of the ribs 20, and the ribs 39 that are externally fitted to the ribs 20 prevent the middle part of the tension springs 25 from moving downward from the ribs 20. The tip of the tension spring 25 is engaged with the engagement shaft 38 as described above. The engagement shaft 38 is formed in a cylindrical shape and is inserted into the pair of side walls 35 of the receiving bone 20 through the attachment holes, and both end portions of the engagement shaft 38 are prevented from coming off by caulking.

The connecting bone 23 is formed by a metal plate into a U-shaped cross section having a pair of side walls 41 and an upper connecting wall 42 that connects between the upper ends of the pair of side walls 41, and the upper connecting wall 42 is below the parent bone 19. A restricting portion 44 that is positioned and restricts elastic deformation of the parent bone 19 downward is configured.
A pair of first connection protrusions 47 in which a pair of side walls 41 protrudes outward in the longitudinal direction from the upper connection wall 42 are formed on one end side of the connection bone 23, and the pair of first connection protrusions 47 are connected to each other. It arrange | positions so that the board part 32 may be clamped in the thickness direction, and it connects with the connection board part 32 so that rocking | fluctuation around the 1st pivot shaft 48 is possible.

That is, the cylindrical first pivot shaft 48 is inserted into the pair of first coupling protrusions 47 and the coupling plate portion 32 through the mounting holes, and both end portions of the first pivot shaft 48 are prevented from being detached by caulking. Thus, one end side of the connecting bone 23 is connected to the thick connecting portion 31 (intermediate portion) of the main bone 19 via the connecting plate portion 32 so as to be swingable around the first pivot shaft 48.
The other end side of the connecting bone 23 is formed wider than the one end side so that the width of the restricting portion 44 is widened, and the pair of side walls 41 are outward in the longitudinal direction from the upper connecting wall 42 on the other end side of the connecting bone 23. A pair of second connection protrusions 50 are formed so as to protrude in the thickness direction, and the pair of second connection protrusions 50 are arranged so as to sandwich the distal end portion of the rib 20 in the thickness direction. The second pivot shaft 51 is swingably connected.

  That is, the cylindrical second pivot shaft 51 is inserted into the pair of second connection protrusions 50 and the distal end portion of the receiving bone 20 through the mounting holes, and both ends of the second pivot shaft 51 are caulked. Accordingly, the other end side of the connecting bone 23 is connected to the distal end portion of the receiving bone 20 so as to be swingable around the second pivot shaft 51. The connecting bone 23 swings around the second pivot shaft 51 so that it can be folded up and down with respect to the receiving bone 20 as described above.

  According to the above embodiment, when the operation button 16 is pressed in the state of being closed as shown by a two-dot chain line in FIG. 5 is disengaged, so that the lower rocker 5 slides upward with respect to the middle bar 3 by the urging force of the urging means 28, and the main bone 19 is automatically opened and opened. At this time, the lower roll 5 comes into contact with the upper roll 4 via the cylinder spacer 13 and the upward movement of the lower roll 5 is restricted.

  And when the strong wind is received on the lower surface of the umbrella cloth 22 when the umbrella is opened, the main bone 19 is formed in a round bar shape with a synthetic resin having elasticity, and therefore, it is shown by a two-dot chain line in FIGS. As described above, the connecting bone 23 swings about the second pivot shaft 51 as a fulcrum and rises and pivots with respect to the receiving bone 20, and the parent bone 19 is elastically deformed slightly upward. It warps largely upward, and thereby, the strong wind can be released smoothly from the lower side to the upper side of the umbrella cloth 22, and the strong force pressing upward on the main bone 19 and the receiving bone 20 does not act. 20 and the connecting bone 23 can be more reliably prevented from being plastically deformed or damaged.

Then, after all the main bones 19 are warped upward, the intermediate portion of the main bone 19 is moved downward via the receiving bone 20 and the connecting bone 23 by sliding the lower rocker 5 downward with respect to the middle rod 3. By pulling down, it is possible to easily return all the main bones 19 to their original state without upward warping.
In addition, when the umbrella cloth 22 receives strong wind, the distal end side of the main bone 19 is greatly elastically deformed from the portion (intermediate portion) where the connecting bone 23 of the main bone 19 is connected, and the intermediate portion of the main bone 19 is particularly easily damaged. Since the thick bone connecting portion 31 is formed integrally with the middle portion of the main bone 19, the portion where the connecting bone 23 of the main bone 19 is connected by the thick bone connecting portion 31 can be effectively reinforced. Also, it is possible to prevent damage to the parent bone 19 more reliably.

  Further, since the main bone 19 is formed in a long and thin round bar shape by an elastic synthetic resin, when the umbrella cloth 22 receives strong wind from above as shown by an arrow a in FIG. When the main bone 19 is elastically deformed downward at the fulcrum, when the main bone 19 is elastically deformed downward, immediately as shown by a two-dot chain line in FIG. Since the downward elastic deformation is restricted, it is possible to prevent the main bone 19 from being greatly elastically deformed downward, and when the main bone 19 is largely elastically deformed downward, the main bone 19 is plastically deformed or damaged. It is possible to prevent the main bone 19 from swinging up and down and becoming unstable.

  Moreover, since the restricting portion 44 is formed wider than the thickness of the main bone 19, even if the distal end side of the main bone 19 is elastically deformed in the horizontal direction and elastically deformed downward, the master bone elastically deformed downward by the restricting portion 44. 19 can be reliably received and its elastic deformation can be regulated. Even though the main bone 19 is formed in a round bar shape with a synthetic resin having elasticity, the main bone 19 is plastically deformed, broken, or vertically. Oscillation and instability can be prevented more reliably.

  5 to 8 show a second embodiment, and the lower rocker 5 has an upper bone receiving pivot 7, a lower pulling pivot 55, and a lower cylinder projecting downward from the pull pivot 55. 10, the bone receiving pivot 7 and the pulling pivot 55 are separated from each other, and are slidably fitted on the intermediate rod 3 between the bone receiving pivot 7 and the pull pivot 55. The compression spring 56 is provided, and a plurality of drawn lines 57 for connecting the intermediate part of the receiving bone 20 and the drawn line pivoting part 55 are provided. One end of each drawn wire 57 is pivotally attached to the drawn wire pivot portion 55, and the other end is pivotally supported in the midway portion of the receiving bone 20.

  Thus, the compression spring 56 and the plurality of drawn lines 57 constitute a biasing means 28 that biases the lower rocker 5 upward toward the upper rocker 4 with respect to the middle rod 3. Accordingly, when the operation button 16 is pressed, the engagement of the lower rocker 5 by the engagement mechanism 29 is released, and the lower rocker 5 is raised by the urging force of the urging means 28 so that the main bone 19 is automatically opened. It is configured.

A buffering coil spring 58 that is externally fitted to the intermediate rod 3 is provided between the upper roller 4 and the cylindrical spacer 13.
The connecting bone 23 is formed in a U-shaped cross-section integrally including a pair of side walls 41 and a lower connecting wall 59 that connects the lower end portions of the pair of side walls 41 with a hard synthetic resin. The connecting wall 59 constitutes a restricting portion 44 that is located below the parent bone 19 and restricts the elastic deformation of the parent bone 19 downward. The restricting portion 44 is wider than the thickness of the portion corresponding to the restricting portion 44 of the parent bone 19. Is formed. Then, in a normal state in which the main bone 19 is opened and opened, the lower half of the main bone 19 is fitted between the upper portions of the side walls 41 of the connecting bone 23 (regulating portion 44), and the main bone 19 is elastically deformed downward. Is received from the lower side so as to be internally fitted by the restricting portion 44.

A pair of connecting plate portions 32 protrude downward from the thick connecting portion 31 of the main bone 19. A first connection protrusion 47 that can be inserted between the pair of connection plate portions 32 is provided on one end side of the connection bone 23, and the first connection protrusion 47 is disposed between the pair of connection plate portions 32, It is connected to the connecting plate portion 32 so as to be swingable around the first pivot shaft 48.
That is, the cylindrical first pivot shaft 48 is inserted into the pair of coupling plate portions 32 and the first coupling projection 47 through the mounting holes, and both ends of the first pivot shaft 48 are prevented from coming off by caulking. Thus, one end side of the connecting bone 23 is connected to the thick connecting portion 31 (intermediate portion) of the main bone 19 via the pair of connecting plate portions 32 so as to be swingable around the first pivot shaft 48.

On the other end side of the connecting bone 23, a pair of side walls 41 protrudes outward in the longitudinal direction from the lower connecting wall 59 to form a pair of second connecting protrusions 50.
As in the case of the first embodiment, the rib 20 is formed in a U-shaped cross section having a pair of side walls 35 and a connecting wall 36 that connects the upper ends of the pair of side walls 35 with a metal plate. A connecting support portion 61 is formed at the front end portion of the base plate 20 by projecting a pair of side walls 35 outward in the longitudinal direction from the connecting wall 36 and overlapping each other.

  A pair of second connection protrusions 50 of the connection bone 23 are disposed on both sides of the connection support portion 61 at the distal end portion of the receiving bone 20 and are swingably connected around the second pivot shaft 51. That is, the cylindrical second pivot shaft 51 is inserted into the pair of second coupling protrusions 50 and the coupling support portion 61 of the rib 20 via the mounting holes, and both end portions of the second pivot shaft 51 are formed. The other end of the connecting bone 23 is connected to the distal end portion of the receiving bone 20 so as to be swingable around the second pivot shaft 51.

  According to the second embodiment, as in the case of the first embodiment, when a strong wind is received when the umbrella is opened, the main bone 19 warps largely upward due to elastic deformation, and the main bone 19 and the main bone 20 are connected. The bone 23 can be reliably prevented from being plastically deformed or damaged, and after the main bone 19 is warped upward, the lower bone 5 is slid downward relative to the middle rod 3 to cause the main bone 19 to move. It can be easily returned to the original state without upward warping.

Moreover, in the normal state where the main bone 19 is opened and opened, the lower half of the main bone 19 is fitted between the upper portions of the side walls 41 of the connecting bone 23 (the restriction portion 44), and the main bone 19 is elastically deformed downward. Is received from the lower side so as to be internally fitted by the restricting portion 44, and the restricting portion 44 can reliably restrict the distal end side of the main bone 19 from being elastically deformed in the horizontal direction, and even if the main bone 19 is elastically deformed downward, The restricting portion 44 can receive the main bone 19 to restrict its elastic deformation, and more reliably prevent the main bone 19 from being plastically deformed or damaged, or being unstable by swinging up and down or horizontally. Can be prevented.

In the above-described embodiment, the main bone 19 is formed in a round bar shape with a synthetic resin having elasticity. Instead, the main bone 19 has a square bar shape with a square cross section, a rod shape with a triangular cross section, and an elliptical cross section. You may form in rod shape and other rod shapes.
In the above embodiment, the receiving bone 20 is formed in a U-shaped cross section by a metal plate. Instead, the receiving bone 20 may be formed in a U-shaped cross section by synthetic resin or the like. The ribs 20 may be formed in a cross-sectional shape other than the U-shaped cross section. Further, the connecting bone 23 may be formed in a cross-sectional shape other than the U-shaped cross section.

  Further, the main bone 19 elastically deformed downward may be received by, for example, the second pivot shaft 51, and the restricting portion 44 provided on the connecting bone 23 may be configured by the second pivot shaft 51 and the like.

DESCRIPTION OF SYMBOLS 1 Umbrella 3 Middle stick 4 Upper roll 5 Lower roll 19 Parent bone 20 Receiving bone 23 Connection bone 31 Bone connection part 32 Connection board part 41 Side wall 42 Upper connection wall 44 Control part 47 1st connection protrusion 48 1st pivot 50 50 1st pivot 2 connecting protrusions 51 2nd pivot shaft 59 Lower connecting wall

Claims (6)

A plurality of main bones (19) whose one ends are pivotally attached to an upper rocker (4) fixed to the tip of the middle bar (3), and a lower rocker which is slidably fitted to the middle bar (3). (5) includes a plurality of bone receiving bones (20) whose proximal ends are pivotally attached and the distal ends extend radially toward the intermediate portion of the main bone (19), and the distal end portion of the bone receiving (20) and the main bone (19) Are connected by connecting bones (23) that can be folded back and forth in the vertical direction with respect to the receiving bone (20), and the opened bones (19) are folded back. An umbrella supported from below in (23),
The main bone (19) is formed into a rod shape with an elastic synthetic resin, and the connecting bone (23) is positioned below the parent bone (19) and restricts elastic deformation downward of the parent bone (19) (44) ), And the restricting portion (44) is formed wider than the thickness of the portion corresponding to the restricting portion (44) of the main bone (19).   A thick and thick joint portion (31) is integrally formed at the middle portion of the main bone (19), and a connecting plate portion (32) projecting downward from the thick joint portion (31) is integrally formed. The umbrella according to claim 1, wherein one end side of the connecting bone (23) is connected to the plate portion (32) so as to be swingable around the pivot shaft (48).   The connecting bone (23) is formed in a U-shaped cross section having a pair of side walls (41) and an upper connecting wall (42) connecting the upper ends of the pair of side walls (41). ) Is the restricting portion (44) that receives the main bone (19) from the lower side, and the pair of side walls (41) are arranged on the one end side of the connecting bone (23) outward in the longitudinal direction from the upper connecting wall (42). A pair of protruding projecting protrusions (47) are provided, and the pair of connecting projecting protrusions (47) are arranged so as to sandwich the connecting plate part (32) in the thickness direction and pivot to the connecting plate part (32). The umbrella according to claim 2, wherein the umbrella is swingably connected around the support shaft (48).   The other end side of the connecting bone (23) is formed wider than the one end side so that the width of the restricting portion (44) is widened, and a pair of side walls (41) are connected to the other end side of the connecting bone (23). A pair of connecting protrusions (50) protruding outward in the longitudinal direction from the wall (42) are provided, and the pair of connecting protrusions (50) sandwich the distal end portion of the rib (20) in the thickness direction. The umbrella according to claim 3, wherein the umbrella is arranged so as to be swingable about a pivot shaft (51) to the tip of the receiving bone (20).   A pair of connecting plate portions (32) protrudes downward from the thick bone connecting portion (31) of the main bone (19), and can be inserted between the pair of connecting plate portions (32) on one end side of the connecting bone (23). Protrusions (47) are provided, and the connecting protrusions (47) are disposed between the pair of connecting plate portions (32), and the pair of connecting plate portions (32) are arranged around the first pivot shaft (48). The umbrella according to claim 2, wherein the umbrella is swingably connected.   The connecting bone (23) is formed in a U-shaped cross section having a pair of side walls (41) and a lower connecting wall (59) connecting the lower ends of the pair of side walls (41). 41) The lower connecting wall (59) is the restricting portion (44) that is received from the lower side so as to fit into the main bone (19). Umbrella as described in.

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