JP2011087887A - Umbrella for reducing wind pressure on umbrella fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an umbrella for naturally reducing wind pressure and protecting the umbrella from breakage of umbrella ribs without any special operation by a user of the umbrella when the umbrella is put up and receives great wind pressure with a strong wind. <P>SOLUTION: The tip side of a rib is cut in proximity to a joint part between the rib of the umbrella and support ribs, and both end parts are coupled by a coil spring. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an umbrella that is difficult to bend when the main bone is broken even under strong winds.

  Conventional umbrellas, whether they are rain umbrellas or parasols, are relatively strong against the wind blowing from the front, and even with strong winds, it is possible to considerably prevent damage to the parent bones etc. by slightly squeezing the umbrella. . However, if the wind direction suddenly changes and it blows from the side, or there is a gust of wind coming from the back, there are many cases where it can not cope. The umbrella is likely to be blown away, or the umbrella is warped in reverse so that it is in a so-called state that it is easily affected by the bending of the parent bone.

  Many ideas have been proposed so far to make up for the weaknesses of umbrellas, many of which provide ventilation windows in part of the umbrella cloth to escape the wind, strengthen the umbrella's backbone, For example, a reinforcing material (line) is stretched on the inner space of the umbrella to prevent reverse warping. However, there remains a concern that these measures will not be able to withstand strong wind pressure or that people will be blown away with the umbrella. In addition to this, a joint provided with a joint that bends the parent bone at some point on the main bone (see Patent Document 1), a joint provided with a coil spring in the middle of the main bone (see Patent Document 2), and the like have been proposed.

JP 2005-81129 A Noto 3135233

  Although the above-mentioned patent document 1 is effective in reducing wind pressure compared to the other methods described above, the point that the joint is provided on the master bone is disadvantageous in that the bending direction of the joint is only one direction. In addition to the wind blowing from behind the umbrella, there are strong winds coming from the side wind and from the front, in which case there is a risk that the main bones and other parts will be damaged unprotected. In Patent Document 2, the master bone is made of piano wire or stainless steel wire, and the middle is wound into a coil spring, but even if the spring part is good, if the master bone is a piano wire etc., the whole umbrella will be unstable and unstable. There remains concern that it may be difficult to do. The present invention has been made to solve these drawbacks.

  In order to solve the above-mentioned problem, the idea described in claim 1 is an umbrella characterized in that the distal end side of the parent bone is cut close to the connecting portion of the parent bone and the supporting bone, and both ends thereof are connected by a coil spring. It is an umbrella that reduces the wind pressure on the cloth.

  Widely used umbrellas are supported by a support bone that extends radially from a lifting cylinder that slides the handle around the center of the main bone that extends radially from the stone tip of the top of the umbrella, and a strong wind has blown In this case, a larger wind pressure is applied to the outer edge portion where the area of the umbrella cloth is wide, and the parent bone is easily bent in the vicinity of the joint portion between the main bone and the supporting bone where they gather. In order to prevent this, it is conceivable that a method using a material that does not break even if it is bent even if it is subjected to wind pressure by making the connecting portion flexible by reinforcing the main bone of the connecting portion.

  The former method has already been adopted by a method in which a reinforcing rod is wrapped around the main bone with some umbrellas, and is effective because of its increased strength against wind pressure to a certain extent. However, this is also a problem, and the disadvantage is that if the wind pressure is extremely strong, the parent bone will break, and if that happens, it cannot be restored.

  The latter is a method proposed by the present invention, in which the parent bone is cut at a site close to the joint between the parent bone and the supporting bone and close to the distal end of the parent bone, and the cut portion is connected by a coil spring. Specifically, the parent bone is inserted into a coil spring having a diameter that the parent bone just enters, and both ends of the spring are inserted into holes formed in the parent bone and fixed so that the coil spring does not fall off.

  The vertical section of the coil spring is circular, but the normal cross section of the main bone is U-shaped, and it is difficult to sit down even if the coil spring is inserted. Well, the spring function can be fully demonstrated.

  The size of the coil spring must not be too loose when the main bone is inserted, or it may not be so hard that it must be pushed in. If it is too loose, play will occur in the parent bone, and if it is too hard, the normal functioning of the spring will be hindered. The size that fits well is good.

  As for the strength of the coil spring, an appropriate strength is required without being too strong or too weak. That is, if it is too strong to bend even if it receives a considerable wind pressure, there is no point in providing a spring with a large wind pressure on the hand holding the umbrella. On the other hand, if the spring is too weak, the outer edge of the umbrella sways swaying due to vibrations when walking with the umbrella or the wind pressure of the weak wind, the parent bone easily bends and becomes an umbrella that is difficult to use. Ideally, it should not be shattered by weak winds or slight vibrations but bend enough to release the wind pressure when it receives a certain level of wind pressure.

  If sufficient strength cannot be obtained with one spring, there is a method of increasing the strength by placing another coil spring having a slightly larger diameter on the mounted coil spring. A good point of the coil spring is that the strength of the spring can be adjusted by the material and thickness of the spring, and the coil spring can be bent more than 90 degrees and has excellent restoring force.

  In order to solve the above-mentioned problem, the idea described in claim 2 is characterized in that a connecting portion by a coil spring is further provided at an intermediate portion from the connecting portion of the parent bone and the supporting bone to the distal end portion of the parent bone. It is an umbrella which reduces the wind pressure concerning the umbrella cloth as described in.

  In this idea, by placing another coil spring in the middle part of the parent bone, the burden on the parent bone can be further reduced as compared with the method according to claim 1, and it is possible to cope with the strong wind more closely. Is.

  In order to solve the above-mentioned problem, the idea described in claim 3 is to reduce the wind pressure applied to the umbrella cloth according to claim 1, characterized in that all the parent bones ahead of the connecting portion of the parent bone and the supporting bone are constituted by coil springs. It is an umbrella.

  By using coil springs all the way from the joint between the main bone and the support bone, when wind pressure is applied to the umbrella cloth, the main bone composed of the coil springs will exhibit even more flexibility, and the wind blowing from all sides will be It is thought that it is unlikely that the parent bone will break.

  Another advantage is that when the umbrella is inserted, the umbrella is blown by the wind, and if it hits an object, the main bone may be bent, but by configuring the main bone from the center part to the tip with a coil spring Such an accident can be prevented.

  Since the coil spring is provided near the joint between the main bone and the support bone where the wind pressure is the highest on the umbrella bone, the coil spring can bend freely and receive the wind even if it blows from the front, back, left, right, up or down. It is possible to prevent the parent bone from being easily damaged. Also, if the wind stops for a moment, the spring's restoring force will automatically work and the coil spring will immediately return the parent bone to its original state, and in the case of a parasol, the time when the person pointing to the umbrella gets wet in the rain, in the case of a parasol Can minimize the time to receive direct sunlight. As another effect, when a portion near the tip of the main bone hits an object and receives an impact, the main bone can bend freely in all directions to protect the umbrella from breakage of the main bone.

  It is the perspective view which looked at the expanded umbrella from the inside, and shows the state which installed the coil spring in the main bone and support bone vicinity.   It is an enlarged perspective view near the connection part of a main bone and a support bone, and the state which connected the cut main bone with the coil spring is shown. The cut part of the main bone is hidden under the spring and cannot be seen.   It is the perspective view which looked at the umbrella from the inside, and is a figure which shows the state comprised from the connection part of the main bone and the support bone by all the coil springs.   When a strong wind blows in the direction of the arrow, the coil spring of the connecting portion of the main bone and the supporting bone is bent upward (outside) and the umbrella is reversely warped.   When a strong wind blows in the direction of the arrow, the coil spring of the connecting portion of the main bone and the supporting bone bends downward (inward) and the outer edge of the umbrella hangs down.

  The present invention has the above-described configuration, and the usage method is as follows. However, the usual umbrella and usage are not specially changed. Even if the umbrella bends in the reverse direction or vice versa, it will not worry about the fracture of the parent bone, but for the purpose of ensuring safety, the umbrella was slightly squeezed to attenuate the wind pressure when receiving strong winds Is more secure.

  When this umbrella is used, it is used in a state where an ordinary umbrella is held with the grip portion 8 unless rain or wind is strong. When the wind and rain are strong, the grip portion 8 and the handle portion 7 are firmly gripped so that the umbrella is not blown, and the umbrella is used in the direction in which the rain comes so as not to get wet. This usage is no different from an ordinary umbrella. When a strong wind suddenly blows from behind in this state, first, wind pressure is applied to the umbrella cloth 5, which is transmitted as a large force to the connecting portion 3 between the main bone 1 and the support bone 2. Under the force, the coil spring 4 provided near the connecting portion 3 bends outward and the wind is weakened. At the same time, the umbrella cloth 5 is opened by the coil spring 4 and the umbrella returns to its original state. Similarly, when a strong wind blows from the outside of the umbrella, the coil spring 4 is bent inward together with the umbrella cloth 5 to prevent the main bone 1 from being bent. When the umbrella receives a crosswind, the coil spring 4 bends freely in a direction to reduce the wind pressure, and protects the parent bone 1 from damage. Even when the outer edge of the umbrella hits an obstacle or the like, the coil spring 4 similarly bends in each direction in response to the impact to prevent damage to the parent bone 1. The operation of this series of umbrellas is the same as that of the umbrella shown in claim 2 in which the coil springs 4 are mounted at two locations of the main bone 1 or the umbrella shown in claim 3 in which the coil springs 4 are all constituted from the connecting portion 3 to the tip. It is.

DESCRIPTION OF SYMBOLS 1 ... Master bone 2 ... Supporting bone 3 ... Connection part 4 ... Coil spring 5 ... Umbrella cloth 6 ... Lifting cylinder 7 ... Handle part 8 ... Grip part

Claims (3)

  An umbrella for reducing wind pressure applied to an umbrella cloth, characterized in that a distal end side of a parent bone is cut close to a connecting portion between the main bone and a supporting bone and both ends thereof are connected by a coil spring.   2. The umbrella for reducing wind pressure applied to an umbrella cloth according to claim 1, wherein a connecting portion by a coil spring is further provided at an intermediate portion from the connecting portion between the main bone and the supporting bone to the tip portion of the main bone.   2. The umbrella for reducing wind pressure applied to an umbrella cloth according to claim 1, wherein all of the parent bone from the connecting portion between the main bone and the supporting bone are constituted by a coil spring.

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