JP5498897B2 - Bird net opening and closing device - Google Patents

Description

  The present invention is a kind of device for protecting agricultural products cultivated in fields and orchards from bird damage. More specifically, the present invention relates to a device that can easily open and close a ceiling net of a birdproof net constructed to protect various agricultural products grown in fields and orchards from the harm of birds.

The annual damage caused by birds of crops such as cereals, fruits and vegetables is enormous. Various devices are known as devices for protecting agricultural products from bird damage, such as scarecrow, light reflection sheet, explosion sound, eyeball balloon, application of electromagnetic waves, bird carcasses and foods with unusual odors and stimulants. However, all of these devices are initially effective in keeping birds away, but the effects of protecting the original crops from birds are gradually diminished by learning and getting used to birds.
Therefore, as an effective method for avian damage to agricultural crops, a method using a so-called bird-proof net that covers the entire cultivated portion with a net is widely known as the safest and most efficient method. This birdproof net is not just a matter of covering the cultivated land with a net, and various improvements have been made to apply it to the damaged environment. For example, it can be easily deployed on a lotus field for lotus cultivation, and it is suitable for preventing damage to the lotus due to strong winds and protecting it from damage caused by waterfowl (Patent Document 1). A device that can be easily performed and can secure a height suitable for bird protection and a height suitable for farm work (Patent Document 2), hardly damages crops and birds, is easy to deploy and easy to remove Bird net (Patent Document 3), inexpensive and easy to install and remove, but also saves space for storing removed members (Patent Document 4), and even though it is lightweight There is known a bird-proof net that is devised such as a bird-proof net (Patent Document 5) that does not collapse due to a typhoon and that has good workability and is easy to open and close.

Japanese Patent Laid-Open No. 09-0238582 JP 2005-01116 A JP 2007-043933 A JP 2006-166723 A Utility Model Registration No. 3106056

The use of bird nets is an effective means to prevent crops from being damaged by birds, but the entire cultivation area of fields and orchards with bird nets, that is, the ceilings of fields and orchards It is necessary to cover the entire side and the side surface, and it takes considerable time and labor to open and close the net at a high position such as the ceiling. The general usage of bird nets is to keep the bird nets deployed (when the bird nets are stretched) while the crops are growing, but to adjust the amount of sunlight. Has been adjusted to fully open or partially open the bird net. If a large amount of snow is expected, the bird net will be broken by the weight of the snow if it is left as it is. To prevent the bird nets from being broken by snow.
In this way, the bird net is not always in a state where it is unfolded while the crop is growing, but is appropriately closed or unfolded according to the climate, cultivated fruits, vegetables, or the like.
And as a method of closing or unfolding the ceiling net at a high position, conventionally, the bird net has been closed or unfolded by pulling the rope provided at the end of the bird net. ing. However, when pulling the rope tied to the end of the bird net, it can be deployed relatively smoothly when the bird net is deployed, but only the end when pulling the bird net. There was a problem that it was not possible to efficiently pull the whole bird-proof net because it was dragged in a state of being bent over.

In order to solve the conventional problems, the present applicant provides two ropes so as to sandwich the top and bottom of the ceiling net covering the ceiling portion of the bird's net, and simultaneously winds the two ropes. By installing a “twist removal mechanism” in the middle of the winding device that can eliminate the twisting of the two ropes that occur and return to the original state without twisting It has been found that.
According to the first invention of the present application, two sets of pulleys sharing the same axis, and a rope twist removing device having a structure in which a rotating body having a diameter larger than that of the pulley is rotatably provided on both sides of each pulley, There is provided a bird net opening / closing device comprising a cover of the twist removing device provided with a rope introduction hole and a rope discharge hole and a rope winding device.
According to the second invention of the present application, there is provided the above bird net opening and closing device in which the pulley holding hole provided in the cover of the twist removing device is elliptical.
According to the third invention of the present application, the above-described bird net opening and closing device is provided in which the rope introduction guide is provided in the front portion of the rope introduction hole.

According to the first aspect of the present invention, a rope twist-removing device having a structure in which two sets of pulleys sharing the same shaft and a rotating body having a larger diameter than that of the pulleys are rotatably provided on both sides of each pulley. By using a bird net opening / closing device comprising a twist removing device cover and a rope take-up device provided with a rope introduction hole and a rope discharge hole, the hand can be easily operated without being entangled with the bird net that is deployed at a high position. It can be brought forward.
According to the second aspect of the present invention, when the shape of the pulley holding hole for holding the shaft of the pulley provided in the cover of the twist removing device is made elliptical, in addition to the above effect, when winding the rope It is possible to adjust the load of the rope, and it is possible to control problems caused by the twisting of the bird net and the rope.
According to the third aspect of the present invention, by providing the rope introduction guide at the front portion of the rope introduction hole, the rope can be stably wound up.

It is a perspective view of a bird-proof net opening and closing device. It is a schematic diagram which shows the mechanism of a bird-proof net. It is a schematic diagram which shows the usage condition of a bird-proof net opening / closing apparatus. It is the perspective view which showed the whole image of the twist removal mechanism. The inside state of a twist removal mechanism is shown typically. It is the schematic diagram which showed that each of the rotary body was separable. It is a schematic diagram which shows a motion of the elliptical hole holding the axis | shaft of the pulley provided in the twist removal mechanism.

When opening and closing a bird net by a conventional method, a method of opening and closing the bird net while pulling a rope provided at the end of the bird net has been used. There is no problem when unfolding, but when pulling out the unfolded bird net (when the bird net is closed), only the end of the bird net is pulled, so there are two bird nets There was a problem that it was not possible to pull the bird nets evenly by being pulled while being in a folded state. The present invention provides a bird net opening / closing device that can solve the above-described problems, and two ropes provided so as to sandwich the bird net from above and below, and twisting of the two ropes. The present invention is characterized in that a twist removing device that can be wound up is provided. In addition, when it is set as the apparatus which can wind up from both sides of a bird-proof net, the apparatus which winds up two ropes provided so that a bird-proof net may be pinched from the upper and lower sides, and one rope may be wound up The devices are provided at opposite positions.
Details of the bird net opening and closing device of the present invention will be specifically described with reference to FIGS.

FIG. 1 is a perspective view showing a state in which the bird net opening / closing device of the present invention is attached to a net support rod. The bird net opening / closing device shown in this perspective view covers the ceiling portion of the bird net. An embodiment of the present invention in which two ropes provided so as to sandwich an upper surface net from above and below are wound around the bird net by winding the two ropes with a winding device via a twist removing mechanism ing. In FIG. 1, (1) is a bird net, but a ring-shaped rope support is provided on the bird net (1) so that the position does not move when winding two ropes (3). It is preferable to be provided at intervals. In addition, (2) is a bird net support bar installed in the horizontal direction and the vertical direction provided to deploy the bird net. And (3) is two ropes provided in order to bring the bird net (1) close together and to close the bird net (1) (when the bird net is not unfolded) These two ropes are provided so as to sandwich the top net covering the ceiling portion of the bird net (1) from above and below.
When the bird net (1) is deployed, the bird net is not slackened or dumped unlike the case where the bird net is pulled around, and the device for winding the bird net (1). The bird net (1) can be easily deployed simply by winding up one rope (4) using a winding device provided on the opposite side of the wire.

FIG. 2 schematically shows a mechanism for unfolding and pulling the bird net in the bird net opening and closing device of the present invention. As is clear from FIG. 2, one of the bird net support rods (2) is provided with a winding device (7) for winding two ropes (3), and the other bird net The support rod (2) is provided with a winding device (8) for winding up one rope (4) locked to the end of the bird net. Also, what is shown in FIGS. 2 (5) and 6 (6) is a twist provided to remove twisting (kinking) of the rope that occurs when winding the rope, which is a very important element in the present invention. The twist removing mechanism (5) (6) includes a twist removing device and a cover of the twist removing device.
The bird net opening and closing device of the present invention is configured to operate the rope (3) by alternately operating the two ropes (3) and the winding device (7) and one rope (4) winding device (8). FIG. 3 is a perspective view of the bird net opening / closing device schematically shown in FIG. 2, which winds up (4) and opens and closes the bird net (1). In FIG. 3A, one rope (4) provided for unfolding the bird net (1) is engaged with an end of the bird net (1) by a locking tool (17). It shows the stopped state in an easy-to-understand manner. (9) is an annular rope support provided on the bird net (1) so that the position of the two ropes (3) does not move left and right when winding the two ropes (3). is there. In addition, what is shown by (5) (6) of FIG. 3 is a twist provided to remove the twist of the rope (3) (4) that is generated when the rope (3) (4) is wound up. Removal mechanism.

FIG. 4 is an enlarged perspective view of the twist removing mechanism (5) for removing the twist of the two ropes (3) before winding the two ropes (3) sandwiching the bird net. A plurality of pulleys having a special structure are inserted into the twist removing mechanism (5). The twist removing mechanism (5) is provided with two rope introduction holes (10) and two rope discharge holes (11) for winding the two ropes (3). Moreover, the fixing | fixed tool (12) for attaching to a bird-proof net support bar is provided in the front-end | tip part of this twist removal mechanism (5). Moreover, although not shown in FIG. 4, it is preferable that a guide for stably introducing the two ropes (3) is provided in front of the rope introduction hole (10). Moreover, the site | part which provides this fixing tool (12) is arbitrary, and may be attached to the bird-proof net support bar provided in the perpendicular direction, or may be attached to the bird-proof net support bar provided in the horizontal direction. Also good. The present invention is also characterized in that an oval hole (14) for holding the pulley shaft (13) is provided in the cover portion covering the twist removing device. Will be described later with reference to FIG.
FIG. 5 schematically shows an internal state after the cover of the twist removing mechanism (5) is opened. As shown in FIG. 5, the two ropes (3) are respectively supported by the twist removing devices (15) and (16) and transferred to the winding device. Although the external appearance of the twist removing devices (15) and (16) is similar to a commonly used pulley, the twist removing devices (15) and (16) of the present invention are two as shown in FIG. A pulley for transferring the rope (3) and a large-diameter rotating body having a diameter larger than that of the pulley on both sides of the pulley can be rotated separately from the pulley. The structure in which the pulley and the large-diameter rotating body having a diameter larger than that of the pulley can freely rotate has a function as “play” of the twist removing mechanism of the present invention.

  FIG. 6 is a schematic view for explaining that the twist removing mechanism of the present invention can separate the pulley and the large-diameter rotating body and can rotate each independently. When used as a torsion removing mechanism, they are brought together as shown in FIG. 5, but the pulley (15a) (15a) (unlike the ordinary pulley in which the pulley and the large-diameter body on the side surface are integrally formed. 16a) and a large-diameter rotating body (15b) (16b) having a diameter larger than that of the pulley can be rotated separately. When the large-diameter rotating body (15b) and the large-diameter rotating body (16b) are in contact with each other, or when the large-diameter rotating body and the case are in contact, the pulley or the large-diameter rotating body does not rotate smoothly. May be provided with an appropriate stopper at the end or center of the pulley shaft (13). With the present invention having such a structure, a kind of “play” is formed between the pulleys (15a) (16a) and the large-diameter rotating bodies (15b) (16b). And this "play" removes the twist which arises when winding up two ropes (3). Further, the twist removing mechanism (5) of the present invention is not only characterized in that a special pulley as shown in FIG. 6 is used, but as shown in FIG. Since the hole holding the shaft (13) has an elliptical shape (14), "play" is further added. That is, since the elliptical “play” is formed on the cover of the twist removing mechanism (5) of the present invention, the pulley shaft (13) moves within the elliptical range, so that the two ropes (3 ) To be taken up by the take-up device.

Thus, in the present invention, the pulley and the large-diameter rotating body having a diameter larger than that of the pulley are provided so as to freely rotate with respect to the pulley, and the hole for supporting the shaft of the pulley is provided in an elliptical shape. By providing the twist removing mechanism, the bird net can be drawn by hand while efficiently removing the twist of the rope generated when the rope is wound.
In this specification, the aspect of the pulley for winding the two ropes has been mainly described. However, the bird net is naturally deployed on the opposite side of the pulley for winding the two ropes. A pulley is provided to wind up one rope. However, winding one rope provided to deploy a bird net is different from pulling the bird net while winding two ropes, just pulling the end of the bird net. Therefore, detailed description is omitted. It goes without saying that a pulley for winding two ropes from both sides of the bird net can be provided so that the bird net can be opened and closed from either side.

  The damage caused by birds on agricultural products is enormous. The present invention is a device that can easily open and close the ceiling net of a bird protection net constructed to protect various agricultural products grown in fields and orchards from the harm of birds, and crops such as grains, fruits, vegetables, etc. It is an effective means for cultivation.

DESCRIPTION OF SYMBOLS 1 Bird net 2 Bird net support rod 3 Two ropes 4 One rope 5 Twist removal mechanism 6 Twist removal mechanism 7 Winding device 8 Winding device 9 Rope support tool 10 Rope introduction hole 11 Rope discharge hole 12 Fixed Tool 13 Shaft 14 Elliptical hole for holding the shaft of the pulley 15 Twist removing device 15a Pulley 15b Large diameter rotating body 16 Twist removing device 16a Pulley 16b Large diameter rotating body 17 Locking tool

Claims (3)

  Two sets of pulleys sharing the same axis, a rope twist removing mechanism having a structure in which a rotating body having a larger diameter than that of the pulley is rotatably provided on both sides of each pulley, a rope introduction hole and a rope discharge hole are provided. A bird net opening and closing device comprising a cover for a twisting mechanism.   2. The bird net opening / closing device according to claim 1, wherein the hole for holding the shaft of the pulley provided in the cover of the twist removing mechanism is elliptical.   The bird net opening / closing device according to claim 1 or 2, wherein a rope introduction guide is provided at a front portion of the rope introduction hole.

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