JP2010124883A - Umbrella - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an umbrella which is hardly blown off or broken even when it is used under conditions where the strong wind blows and additionally which can be obtained by a simple construction and at a low cost. <P>SOLUTION: An umbrella sheet 2 is formed by joining several sheet pieces 3 which are substantially in the form of isosceles triangles to one another at joint allowances 18. In this case, adjacent joint allowances 18 are joined with being set up together on the outer surface of the umbrella sheet 2 and facing each other with a non-joined part 18a being interposed between them. Slits 19 for alleviating the wind pressure acting on the inner surface of the umbrella sheet 2 by allowing the wind to escape from the inside of the umbrella sheet 2 toward the outside are formed by the non-joined parts 18a and the joint allowances of the non-joined parts 18a. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an umbrella, and more particularly to an umbrella provided with a wind draft mechanism for reducing wind pressure acting on an umbrella sheet.

Conventionally, an umbrella includes an umbrella sheet, a linearly extending shaft rod, an upper skull fixed to the distal end side of the shaft rod, a lower skull slidably fitted on the shaft rod, and the umbrella cloth includes: It is generally provided with a plurality of master bones that are stretched and provided radially from the upper crossbone, and a plurality of bones having one end connected to the main bone and the other end connected to the bottom crossbone. Yes, it is used for a wide range of applications such as umbrellas, parasols and beach umbrellas. Such an umbrella is configured such that, when a bottom wheel is slid up and down along the shaft rod, a plurality of main bones connected to the ribs are opened and closed, and the umbrella sheet is expanded and contracted. ing.
By the way, in such a conventional umbrella, for example, when the wind enters the inside of the umbrella during use under a strong wind, the umbrella is blown off or the main bone is reversed by the wind pressure acting on the inner surface of the umbrella sheet. There was a risk of damage.

  Therefore, in Patent Document 1, a plurality of bones 6 are provided around the tip of the middle rod 1, and an upper fabric 7 is stretched around the bone 6, and further around the middle rod 1 below the bone 6. An umbrella A having an air vent mechanism in which bones 9 are provided radially and a fabric 10 having air holes 11 is stretched on the bones 9 has been proposed. According to this umbrella, even when used in a strong wind as described above, the wind that has entered the inside of the umbrella A can be released from the air hole 11 provided on the upper side of the umbrella A. A is not blown away or damaged.

However, the umbrella described in Patent Document 1 has an upper bone 6 for stretching the upper fabric 7 covering the air hole 11 and a lower fabric for stretching the lower fabric 10 formed with the air holes 11. The side bone 9, the receiving bones 12 and 13 connected to these bones 6 and 9, the crossbones 3 connected to these receiving bones 12 and 13 and slidably fitted to the center rod 1, and the lower fabric As a result, the auxiliary crosspiece 14 and the auxiliary support bone 15 for auxiliary tensioning 10 are required, and as a result, the number of parts is increased and the structure is complicated and the manufacturing cost is increased as compared with the conventional general umbrella. There is a problem.
JP 2000-197511 A

  Accordingly, an object of the present invention is to provide an umbrella that is difficult to be blown off or damaged even when used in a situation where a strong wind blows, and that can be realized at a low cost with a simple structure.

  In order to solve the above-described problems, according to the present invention, an umbrella sheet including a plurality of substantially triangular sheet pieces and an umbrella bone on which the umbrella sheet is stretched are provided, and the umbrella sheets are mutually connected. It is formed by joining the side edges of adjacent sheet pieces to each other at the joining margin, and the umbrella bone is connected to the distal end portion of the shaft rod having a handle at the base end portion and extends radially. A plurality of main bones attached to the inner surface of the umbrella sheet, and the umbrella sheet has a slit extending in a radial direction, and the slit acts from the inner surface side of the umbrella sheet. An umbrella is provided that is configured to be opened by wind pressure to allow passage of wind to the outer surface side thereof.

Here, in the umbrella according to the present invention, the slit is formed to include a pair of edge pieces raised to the outer surface side of the umbrella sheet and abutted with each other, and the pair of edge pieces is an inner surface of the umbrella sheet. It is desirable that the slits are opened apart from each other by wind pressure acting from the side.
And in the preferred embodiment, the umbrella sheet is formed by joining the joining margins of the adjacent sheet pieces together in a state where both are raised to the outer surface side of the umbrella sheet and butted against each other, By setting a part of the joining margin as a non-joining part, at least a part of the edge piece of the slit is formed by the joining margin of the non-joining part.

Furthermore, in the umbrella according to the present invention, it is desirable that the slits are opened at equal angular intervals with respect to the umbrella sheet, and it is desirable that the main bone is disposed along the slits. The umbrella bone is connected to an intermediate portion of the master bone and has a plurality of bone supports for supporting the master bone, and the slit is connected to the master bone in the umbrella sheet. It is more desirable that the point is formed in a circular region connecting the points to each other.
In a preferred embodiment of the present invention, the sheet piece is made of a synthetic resin, and the umbrella sheet is formed by joining the joining margins of the adjacent sheet pieces by heat welding. . In another preferred embodiment, the sheet piece is made of a cloth material, and the umbrella sheet sandwiches the joining margin of the adjacent sheet pieces with a bias tape from both sides, and the sheet piece and the bias tape. Are joined together by stitching together. However, the slit may include a tongue piece formed by integrally extending the tip of each edge piece in the non-joining portion.

  According to the umbrella which concerns on this invention, even if a wind pressure acts on the inner surface side of an umbrella sheet | seat, the wind can be relieved to the outer surface side of the said umbrella sheet | seat through a slit, and the said wind pressure can be relieve | moderated. Therefore, even when the wind blows into the inside of the umbrella during use under a strong wind, the umbrella can be prevented from being blown out or damaged. Moreover, it can be realized at a low cost by suppressing an increase in the number of parts by a simple structure in which a slit extending in the radial direction is provided in the umbrella sheet.

1 to 5 show a first embodiment of an umbrella 1 according to the present invention.
The umbrella 1 includes a flexible umbrella sheet 2 made of a synthetic resin such as vinyl or polyolefin, and a metal umbrella bone 4 on which the umbrella sheet 2 is stretched.
As shown in FIG. 1, the umbrella bone 4 includes a linear shaft bar 5 having a handle 6 attached to a base end portion thereof, an upper skull 7 fixed to a distal end portion of the shaft rod 5, and the above A sliding wheel 8 that is slidably fitted along the axis of the shaft 5, and a plurality of main bones 9 that extend radially from the upper wheel 7 and on which the umbrella sheet 2 is stretched, One end is connected to the main bone 9 and the other end is connected to the sliding wheel 8 to have a plurality of receiving bones 10 for supporting the main bone 9.
The shaft bar 5 is an elongated metal round bar, and the upper handle 7 is formed in a disk shape and is fixedly penetrated at the tip of the shaft bar 5. The base ends of the plurality of main bones 9 are connected to the outer periphery of the upper crossbone 7 so as to be rotatable with respect to the axis of the shaft 5, respectively. The centers are provided radially at equal angular intervals. In the present embodiment, the total number of the main bones 9 is eight, but the present invention is not limited to this.
The sliding wheel 8 has a first sliding wheel 8a and a second sliding wheel 8b that are externally fitted between the upper wheel 7 and the handle 6 with respect to the shaft 5. The two sliding wheel 8a and 8b are connected by a compression coil spring 11 biased toward the upper wheel 7 side.

One end of the same number of receiving bones 10 as the main bone 9 is connected to the outer periphery of the first sliding wheel 8a so as to be rotatable with respect to the shaft of the shaft bar 5, respectively. The receiving bone 10 is arranged in a radial pattern corresponding to the angular position of the parent bone, and the other end of the receiving bone 10 is connected to the connecting bone A in the middle of the length direction with respect to the parent bone 9. In FIG. 1, the two are pivotably connected.
Further, one end of the same number of supporting bones 12 as the receiving bones 10 is connected to the outer periphery of the second sliding wheel 8b so as to be rotatable with respect to the shaft of the shaft bar 5, respectively. The supporting bones 12 are used to support the receiving bones 10 and are arranged in a radial pattern corresponding to the angular positions of the receiving bones 10. The other end of the supporting bone 12 is the receiving bone 10. On the other hand, at an intermediate position in the length direction, it is rotatably connected.

When the umbrella 1 is opened, the sliding wheel 8 moves toward the upper wheel 7 due to the elastic force of the compression coil spring 11, and the supporting bone 12 and the receiving bone 10 are unfolded accordingly. At the same time, the parent bones 9 are also deployed through the bones 10.
On the other hand, when closing the umbrella 1, when the sliding wheel 8 is moved to the handle 6 side against the elastic force of the compression coil spring 11, the supporting bone 12 and the receiving bone 10 are folded. At the same time, the parent bones 9 are also folded through the bones 10.
The sliding wheel 8 has a sliding portion 13 at the lower end of the second sliding wheel 8b for the user to hold and slide the sliding wheel 8 along the shaft 5 axis. It is provided integrally. The slide portion 13 is formed with a fixing hole 13a that can be engaged with and disengaged from a repellant 15 (to be described later) and fixes the sliding wheel 8 to the shaft 5 in a state where the umbrella 1 is closed. Yes.

A stopper member 17 is disposed between the upper wheel 7 and the sliding wheel 8 via a coil spring 16 having one end fixed to the upper wheel 7, and is freely slidable with respect to the shaft 5. Is externally fitted. By doing so, when the umbrella 1 is opened during use, the sliding wheel 8 is brought into contact with the stopper member 17 to restrict the movement of the shaft bar 5 in the distal direction, and at the same time, the impact at the time of contact. Can be relaxed.
On the other hand, between the sliding wheel 8 and the handle 6 of the shaft bar 5, a repellant 15 that can be projected and retracted with respect to the shaft bar 5 by the elastic force of a spring (not shown) protrudes. By engaging 15 with a fixing hole 13a provided in the slide portion 13, the umbrella 1 can be held in a narrowed state when not in use.
The shaft bar 5 has a stone butt 5a at its tip, and the center of the umbrella sheet 2 is sandwiched and fixed between the stone butt 5a and the upper crosspiece 7. Further, a cap member 2 a fixed to the periphery of the umbrella sheet 2 is put on the distal end of the main bone 9, whereby the peripheral edge of the umbrella sheet 2 is fixed to the distal end of the main bone 9.

  The umbrella sheet 2 is composed of a plurality of (8 in the present embodiment) synthetic resin sheet pieces 3 which are substantially isosceles triangles and have the same shape and the same size. It is formed by aligning the corners at the center and joining the side edges of the sheet pieces 3 adjacent to each other at the joining margin 18. Then, the umbrella sheet 2 is stretched on the umbrella bone 4 by arranging the center of the umbrella sheet 2 on the upper handle 7 and fixing the main bone 9 to the inner surface at several locations including the tip. . By doing so, when the umbrella bone 4 is unfolded and the umbrella 1 is opened, as shown in FIG. 2, as shown in FIG. 2, a generally regular polygonal shape (a regular octagon in this embodiment) is reversed as a whole. It is designed to be curved like a bowl.

The umbrella sheet 2 of the umbrella 1 is provided with a plurality of slits 19 extending in the radial direction as shown in FIGS. The slit 19 is formed to include a pair of edge pieces 20 that are raised on the outer surface side of the umbrella sheet 2 and face each other.
As shown in FIGS. 4 and 5, the slit 19 is closed with the inner surfaces of the edge pieces 20 in contact with each other during normal use. When the air pressure blows and wind pressure acts on the inner surface of the umbrella sheet 2, the edge piece 20 opens away and allows the wind to pass outside the umbrella 1, that is, to the outer surface side of the umbrella sheet 2. It is configured. Therefore, even if wind pressure acts on the inner surface of the umbrella sheet 2, the wind pressure can be reduced, and the umbrella 1 can be prevented from being blown or broken by the wind. Further, since the pair of edge pieces 20 protrude to the outer surface side of the umbrella sheet 2 and are liable to fall asleep, it is possible to prevent rain wind from entering from the outer surface side of the umbrella sheet 2.

Here, as shown in FIG. 2, the slits 19 are preferably opened at equal angular intervals with respect to the umbrella sheet 2. By doing so, the wind pressure which acts on the inner surface of the umbrella sheet | seat 2 can be relieved with sufficient balance, without biasing locally in the circumferential direction.
In addition, as shown in FIG. 2, the slit 9 is connected to the umbrella sheet 2 in a circular area B connecting positions corresponding to the connection point A between the parent bone 9 and the receiving bone 10. Although it is desirable that the air pressure is biased toward the A side, it is possible to effectively reduce the wind pressure. However, the present invention is not limited thereto, and is formed outside the region B according to the size of the umbrella sheet 2 and the like. Or may be formed on both.

It should be noted that the height h of the pair of edge pieces 20 in the slit 19 is preferably the same and about 5 mm. However, the height h is not particularly limited, and the height h may be different from each other. h can also be appropriately set according to the material (for example, flexibility) of the umbrella sheet 2.
Further, the length of the slit 19, that is, the length 1 of the edge piece 20 is preferably about 6 to 7% of the length of the parent bone 9 (for example, about 4 cm when the parent bone 9 is 60 cm). However, the present invention is not particularly limited thereto, and can be appropriately set according to the size of the umbrella sheet 2, the number of slits 9 to be opened, and the like.

More specifically, in the sheet piece 3, the joint margin 18 is formed on each of a pair of side edges sandwiching the apex angle. And the said umbrella sheet | seat 3 is formed by mutually joining by the heat welding in the state which started up the joint margin 18 in the mutually adjacent sheet piece 3 to the outer surface side of the umbrella sheet | seat 2, and faced each other. Yes. Further, the main bone 9 is fixed to the inner surface of the umbrella sheet 2 so as to follow the joint margin 18 to which the umbrella sheet 2 is joined.
By the way, as shown in FIG. 3A, the joining allowance 18 is joined to each other with a non-joining portion 18a having a predetermined length not welded to a part thereof. In addition, a tongue piece 21 formed by integrally extending the joint margin 18 is provided at the tip of the pair of joint margins 18 in the non-joint portion 18a. A pair of edge pieces 20 of the slit 19 is formed by the pair of joint margins 18 and the tongue piece 21 in the non-joint portion 18a. The tongue piece 21 is not necessarily required. When the height of the joining margin 18 is sufficiently secured, as shown in FIG. 3B, a pair of joining margins in the non-joining portion 18a is provided. The pair of edge pieces 20 of the slit 19 may be formed by 18 only.

  Furthermore, in the present embodiment, as shown in FIG. 2, the plurality of non-joining portions 18 a, that is, the slits 19 are respectively located at the same radial position that is biased toward the connection point A in the circular region B of the umbrella sheet 2. Along each parent bone 9, they are opened at radial and equiangular intervals. However, the present invention is not limited to this, and the radial position where each slit 19 is provided and the number of slits 19 provided in the joint allowance 18 on each parent bone 9 can be appropriately set according to the size of the umbrella sheet 2 and the like. It is. For example, the radial position in which the slit 19 is provided may be different in each parent bone 9. Further, in the case of a large umbrella whose length of the main bone 9 exceeds 80 cm, a single main bone is provided, for example, a slit 19 is additionally provided at a position closer to the distal end side of the main bone 9 than the circular region B in the umbrella sheet 2 The number of slits provided along 9 may be two or more. Furthermore, it is not always necessary to provide the slits 19 along all the main bones 9, and it is possible to provide every other one, but in that case, the number of the main bones 9 is desirably an even number.

  Thus, the slit 19 is formed along the main bone 9 by using the joint margin 18 of the sheet piece 3. Therefore, in the expanded state of the umbrella sheet 2 with the umbrella 1 opened, the inner surfaces of the pair of edge pieces 20 are more reliably brought into contact with each other by the tension applied in the radial direction of the umbrella sheet 2 by the main bone 9. At the same time, these edge pieces 20 are more likely to fall asleep. When wind pressure acts on the outer surface of the umbrella sheet 2, as shown in FIG. 4, when the main bone 9 abuts against the slit 19 from the inner surface side of the umbrella sheet 2, the wind pressure acts on the inner surface. As shown in FIG. 5, the main bone 9 is separated from the slit 19.

  Therefore, the rain wind from the outer surface side of the umbrella sheet 2 can be more reliably prevented from entering the inside of the umbrella 1, and at the same time, when the wind blows into the inside of the umbrella 1, The pressure acting on the inner surface of the umbrella sheet 2 can be relieved by efficiently escaping to the outside of the umbrella 1, that is, the outer surface side of the umbrella sheet 2. Furthermore, such an effect can be realized by a very simple structure called the slit 19, and it is necessary to prepare a separate member for forming the edge piece 20 when forming the slit 19 in the umbrella sheet 2. Since there is no property, it is possible to use the umbrella manufacturing equipment that has been used conventionally without major modifications, and thus the manufacturing cost can be reduced.

Next, a second embodiment according to the present invention will be described with reference to FIGS. However, here, in order to avoid duplication of explanation, the same constituent parts as those in the first embodiment and the operational effects based thereon are denoted by the same reference numerals, and detailed description thereof is omitted.
The umbrella 30 according to the present embodiment is used, for example, for a parasol that blocks sunlight or a large beach umbrella, and the umbrella sheet 2 and the umbrella bone 4, as in the umbrella 1 according to the first embodiment. However, the umbrella sheet 2 is made of a flexible cloth material. The umbrella sheet 2 is formed by joining together a plurality of cloth sheet pieces 3 which are substantially isosceles triangles and are formed in the same shape and size. Specifically, as shown in FIG. 7, the umbrella sheet 2 is a pair of the sheet pieces 3 in a state in which the joining margins 18 of the adjacent sheet pieces 3 are both raised on the outer surface side of the umbrella sheet 2 and abut each other. Is formed by sandwiching and covering the joint margin 18 from both sides with a bias tape 31 and joining them together by stitching.

  Further, as shown in FIG. 7, the joining allowance 18 is joined to each other with a non-joining portion 18 a having a predetermined length that is not covered and stitched with the bias tape 31. A pair of edge pieces 20 of the slit 19 is formed by a pair of joining margins 18 in the non-joining portion 18a. In addition, as a material which forms the said bias tape, it is possible to use an appropriate material suitable for stitching, such as a cloth material, a synthetic resin, or leather.

As described above, the embodiments of the umbrella according to the present invention have been described in detail. However, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the present invention. is there.
For example, the material forming the umbrella sheet 2 and the sheet piece 3 is not limited to the above-described synthetic resin and cloth material such as vinyl and polyolefin, and may be a laminate of a cloth material and a synthetic resin film. Good materials can be adopted according to the use of the umbrella. In addition, each member such as the shaft 5, the main bone 9, and the receiving bone 10 constituting the umbrella bone 4 is formed of various materials such as FRP, carbon, or wood, as necessary, regardless of metal or synthetic resin. Is possible. Furthermore, in each said embodiment, although the thing which has the structure expanded using the elastic force of the compression coiled spring 11 was illustrated as the umbrella bone 4, it is not restricted to it, General manual operation is carried out. Needless to say, various types of umbrella bones can be adopted including an umbrella bone having a structure that can be opened and closed.

It is a partial fracture front view showing the state where the umbrella concerning a 1st embodiment of the present invention was opened. It is a top view of the umbrella concerning a 1st embodiment. It is the elements on larger scale which show the one aspect | mode of the slit which comprises the wind draft mechanism of the umbrella which concerns on 1st Embodiment. It is the elements on larger scale which show the other aspect of the slit which comprises the wind draft mechanism of the umbrella which concerns on 1st Embodiment. It is XX sectional drawing of Fig.3 (a) in the state in which the wind pressure is not acting inside the umbrella. It is XX sectional drawing of Fig.3 (a) in the state which the wind pressure acted on the inside of an umbrella. It is a fragmentary front sectional view which shows the state which opened the umbrella which concerns on 2nd Embodiment of this invention. It is the elements on larger scale which show the aspect of the slit which comprises the wind draft mechanism of the umbrella which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,30 Umbrella 2 Umbrella sheet | seat 3 Sheet piece 4 Umbrella bone 5 Axis stick 6 Handle 7 Upper wheel 8 Sliding wheel 9 Parent bone 10 Bone 18 Joint margin 18a Non-joining part 19 Slit 20 Slit edge piece 21 Tongue piece Connection point with rib B Circular area of umbrella sheet

Claims (9)

An umbrella sheet composed of a plurality of substantially triangular sheet pieces, and an umbrella bone on which the umbrella sheet is stretched,
The umbrella sheet is formed by joining the side edges of adjacent sheet pieces to each other at the joining margin,
The umbrella bone includes a shaft rod having a handle at a base end portion, and a plurality of main bones attached to the inner surface of the umbrella sheet while being radially connected to the distal end portion of the shaft rod. ,
The umbrella sheet has a slit extending in the radial direction,
The slit is configured to open by wind pressure acting from the inner surface side of the umbrella sheet, and to allow the passage of wind to the outer surface side,
An umbrella characterized by that. The slit is formed to include a pair of edge pieces raised to the outer surface side of the umbrella sheet and abutted against each other,
The pair of edge pieces are separated from each other by the wind pressure acting from the inner surface side of the umbrella sheet, and the slit is opened.
The umbrella according to claim 1. The umbrella sheet is formed by joining the joining margins of the adjacent sheet pieces together in a state where the umbrella sheet is raised to the outer surface side of the umbrella sheet and abutted against each other.
By setting a part of the joining margin as a non-joining part, at least a part of the edge of the slit is formed by the joining allowance of the non-joining part.
The umbrella according to claim 2. The slits are opened at equiangular intervals with respect to the umbrella sheet,
The umbrella according to any one of claims 1 to 3. The parent bone is arranged along the slit,
The umbrella in any one of Claims 1-4 characterized by the above-mentioned. The umbrella bone is connected to the middle part of the master bone and has a plurality of bones for supporting the master bone;
The slit is formed in a circular region in the umbrella sheet that connects the connection points of the ribs to the parent bone.
The umbrella according to any one of claims 1 to 5, wherein The sheet piece is made of a synthetic resin, and the umbrella sheet is formed by bonding the joining margin of the sheet pieces adjacent to each other by heat welding to each other.
The umbrella according to claim 3. The sheet piece is made of a cloth material, and the umbrella sheet is sandwiched by a bias tape from both sides of the sheet piece adjacent to each other, and the sheet piece and the bias tape are stitched together to join. Formed by,
The umbrella according to claim 3. Each edge piece of the slit is formed including a tongue piece formed by integrally extending the tip of the joining margin in the non-joining portion.
The umbrella according to claim 3.

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