Nest removal bag

Abstract

To provide nest building removal bag that can suppress falling and scattering of the construct of a nest building when a nest is removed from a high place.SOLUTION: A nest building removal bag 1 is used for the purpose of removing a nest building that exists in a high place of a structure such as a steel tower 6. The nest building removal bag 1 includes: a bag body 2 having a capacity in which a nest building can be stored and having an opening 2H for taking in a nest building; a holding sheet 3 for blocking the opening 2H; a tightening rope 4 which can tighten the opening 2H, with the holding sheet 3 blocking the opening 2H; and a shouldering belt 5 which is used when a worker shoulders the bag body 2. The holding sheet 3 is combined with the bag body 2 by a seam part 31.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a nest removal bag used when removing nests existing at high places of structures such as transmission line towers.

Background Art

[0002] Wild birds such as crows may build nests on towers that support high-voltage transmission lines. In rare cases, a part of the nest components, for example, a conductive wire body, creates a short-circuit path and causes a ground fault accident. Therefore, it is desirable to remove the nest as much as possible. For removing the nest, it is necessary for workers to climb to the nest position on the tower, remove the nest, and carry the removed nest back to the ground.

[0003] Patent Document 1 discloses a nest material storage work net that can be folded. An operator climbs the tower with the nest material storage work net in a folded state, assembles it into the state of the original work net, and removes the nest with the work net. Patent Document 2 discloses a nest removal bag that includes a sheet that is deployed on the tower below the nest and wraps and collects the nest dropped from the tower.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] When removing nests from high places, it is crucial to suppress the falling and scattering of nest components when removing the nest from the transmission tower and when transporting the removed nest. However, with the work net of Patent Document 1, the falling and scattering of nest components inevitably occurs. With the nest removal bag of Patent Document 2, the scattering of nest components is likely to occur when the nest is dropped onto the sheet.

[0006] The object of the present invention is to provide a nest removal bag that can suppress the falling and scattering of nest components when removing a nest from a high place. [Means for solving the problem]

[0007] A nest removal bag according to one aspect of the present invention is a nest removal bag for removing nests located at high places on a structure, comprising: a bag body having a volume capable of accommodating a nest and having an opening for taking in the nest; a retaining sheet for closing the opening; and a tightening means capable of tightening the opening when the retaining sheet is closing the opening.

[0008] This nest removal bag allows the entire nest to be taken into the bag through the opening. For example, the nest can be taken into the bag by wrapping it around the opening. This makes it easier to suppress the falling and scattering of nest components when removing the nest from a structure. After taking in the nest, the opening can be closed with a retaining sheet and further tightened with a tightening mechanism. Therefore, even when carrying the nest back to the ground from a high place, the falling and scattering of nest components can be suppressed.

[0009] In the nest removal bag described above, it is desirable that the retaining sheet has a connecting portion to which a part of the periphery of the retaining sheet is attached to the bag body.

[0010] With this nest removal bag, the opening of the bag body can be opened and closed while the retaining sheet is attached to the bag body at the joint. This makes nest removal work easier. For example, after the nest is taken into the bag body, the retaining sheet can be easily placed over the nest. In addition, because the retaining sheet is integrated with the bag body, the nest removal bag is easy to transport when ascending or descending to high places, and easy to store in warehouses, etc.

[0011] In the above-described nest removal bag, it is desirable that the connecting portion has a configuration in which, when the bag body is positioned with the opening facing downwards, the retaining sheet hangs down from the connecting portion, substantially opening the opening completely.

[0012] With this nest removal bag, if the bag body is positioned with the opening facing downwards, the retaining sheet hangs down and the opening opens. This makes it easier to place the bag body over the nest from above, lift the nest, and invert the bag body to take the nest into the bag body. Performing this operation minimizes the spillage of nest components.

[0013] In the above-described nest removal bag, it is desirable that the bag body has a circular bottom and cylindrical sides extending upward from the periphery of the bottom, and that the opening is located at the upper end of the sides.

[0014] Most nests have a circular, dome-like shape. The nest removal bags described above can improve the efficiency of nest containment.

[0015] In this case, it is more desirable that the bag body has a shape in which the height of the sides is shorter than the diameter of the bottom.

[0016] This nest removal bag has a cylindrical shape with a short axial length, meaning it is a thin cylindrical shape. Therefore, the bag can be made compact after the nest is removed, and contact with the charging parts is less likely to occur.

[0017] In the above-described nest removal bag, it is desirable to further include a backpack belt that is attached to the back surface of the bottom and that the operator can carry the bag body on the back.

[0018] According to this nest removal bag, after the operator puts the nest into the bag body, when carrying the nest back, the operator can carry the nest removal bag using the backpack belt. Therefore, both hands of the operator are free, and the descending operation from a high place can be performed smoothly.

[0019] In the above-described nest removal bag, it is desirable that the pressing sheet is coupled to the bag body such that the coupling portion is located on the upper end side of the bag body in a state where the operator is carrying the bag body on the back.

[0020] According to this nest removal bag, when the operator is carrying the bag body on the back, the pressing sheet hangs down from the coupling portion. That is, the pressing sheet naturally takes a posture of closing the opening. Therefore, when the operator descends from a high place, the fall of the nest components can be further suppressed.

[0021] In the above-described nest removal bag, it is desirable that the bag body has a plurality of through holes at the peripheral edge of the opening, and the squeezing means is a squeezing rope inserted through the plurality of through holes.

[0022] According to this nest removal bag, after closing the opening of the bag body with the pressing sheet, by simply squeezing the opening with the squeezing rope, it becomes possible to completely wrap the nest. Therefore, the efficiency of the nest removal work can be improved.

Effect of the Invention

[0023] According to the present invention, it is possible to provide a nest removal bag that can suppress the fall and scattering of nest components when removing a nest from a high place.

Brief Description of the Drawings

[0024] [Figure 1]FIG. 1(A) is a schematic perspective view of a nest removal bag according to an embodiment of the present invention, and FIG. 1(B) is a perspective view of the nest removal bag with the nest intake opening opened. [Figure 2] FIG. 2(A) is a front view of the bag body of the nest removal bag, FIG. 2(B) is a side view of the bag body, and FIG. 2(C) is a front view of the pressing sheet. [Figure 3] FIG. 3 is a view showing the nest removal bag being carried on the back of an operator. [Figure 4] FIGS. 4(A)-(C) are views showing the procedure for removing a nest on a steel tower using the nest removal bag. [Figure 5] FIGS. 5(A)-(C) are views showing the procedure for removing a nest on a steel tower using the nest removal bag. [Figure 6] FIGS. 6(A)-(C) are views showing the procedure for removing a nest on a steel tower using the nest removal bag. [Figure 7] FIG. 7 is a front view of an example of the nest removal bag. [Figure 8] FIG. 8 is a rear view of an example of the nest removal bag. [Figure 9] FIG. 9 is a plan view of an example of the nest removal bag. [Figure 10] FIG. 10 is a right side view of an example of the nest removal bag. [Figure 11] FIG. 11 is a left side view of an example of the nest removal bag. [Figure 12] FIG. 12 is a bottom view of an example of the nest removal bag. [Figure 13] FIG. 13 is a perspective view of an example of the nest removal bag. [Figure 14] FIG. 14 is a view showing the state where the pressing sheet is opened in an example of the nest removal bag.

Embodiments for Carrying out the Invention

[0025] Hereinafter, a nest removal bag according to an embodiment of the present invention will be described in detail with reference to the drawings. The nest removal bag of this embodiment is a bag used by workers to remove nests of wild birds located at high places on structures such as skyscrapers, radio towers, monuments, power transmission towers, and utility poles, and to take the nests back with them. One preferred specific use of the nest removal bag of this embodiment is for removing and collecting nests built by crows on towers supporting high-voltage power transmission lines. In this case, the worker carries the nest removal bag up to the nesting site on the tower, removes the nest, puts the nest into the nest removal bag, and then descends from the tower.

[0026] [Composition of the nest removal bag] Figure 1(A) is a schematic perspective view of a nest removal bag 1 according to one embodiment of the present invention. The nest removal bag 1 comprises a bag body 2, a retaining sheet 3, a tightening rope 4 (tightening means), and a shoulder belt 5. Figure 1(B) is a diagram showing the nest removal bag 1 of Figure 1(A) with the retaining sheet 3 open. Figure 2(A) is a front view of the bag body 2, Figure 2(B) is a side view of the bag body 2, and Figure 2(C) is a front view of the retaining sheet 3.

[0027] The bag body 2 has a volume capable of containing the nest to be removed and has an opening 2H for taking in the nest. The bag body 2 can be made of, for example, a high-strength fabric such as tarpaulin or denim, or a sewn product such as leather or a synthetic resin sheet. The bag body 2 has a circular bottom 21 and cylindrical side parts 22 extending upward from the periphery of the bottom 21. The opening 2H for taking in the nest is a circular opening located at the upper end 23 of the side part 22. The bag body 2 has a cylindrical shape with a short axial length, where the height h of the side part 22 is shorter than the diameter d of the bottom 21.

[0028] Bird nests generally have a circular, dome-like shape, consisting of a central area for egg-laying and brooding, and an outer perimeter that supports this central area. By using a bag body 2 with a short, cylindrical shape, the efficiency of accommodating dome-shaped nests can be increased. In addition, the bag body 2 can be made compact after the nests are taken in, making it less likely for it to come into contact with the live parts of the transmission tower.

[0029] The nests that crows build on high-voltage power transmission towers are approximately 50-70 cm in diameter and 20-30 cm in height. The materials used are tree branches, grass stems, feathers, etc., but conductive artificial objects such as power lines and metal wires may also be included. When such crow nests are targeted for removal, for example, a bag body 2 can be made using a canvas fabric with excellent strength and flexibility, with a bottom diameter d = 60 cm and a side height h = 30 cm.

[0030] d / h can be selected from a range of approximately 1 to 3, preferably 1.5 to 2.5. If d / h is less than 1, the bag body 2 becomes a long cylindrical shape in the axial direction, and when a worker carries the nest removal bag 1 on their back, the degree of protrusion from the back increases. In this case, the possibility of contact with live parts increases, and problems such as contact with the steel tower framework and interference with climbing the steel tower are more likely to occur. On the other hand, if d / h is greater than 3, the bag body 2 becomes an excessively short cylindrical shape, and the ability to contain nests deteriorates. In addition, framework materials to maintain the cylindrical shape of the bag body 2 and frame materials to enable folding may be incorporated. Of course, the bag body 2 may also be made without integrating the framework materials, etc., and can be freely folded or rolled up.

[0031] The retaining sheet 3 is a circular sheet that closes the opening 2H of the bag body 2. The retaining sheet 3 has a diameter equal to the diameter d of the bottom 21 and can be made of the same material as the bag body 2. The nest placed in the bag body 2 through the opening 2H is held in place by the retaining sheet 3 to prevent it from falling out of the opening 2H.

[0032] The presser sheet 3 has a suture portion 31 (connecting portion) for joining it to the bag body 2. The suture portion 31 is formed by sewing a part of the presser sheet 3 to the upper end 23 of the bag body 2 near the periphery of the circular presser sheet 3. The length of the suture can be about 1 / 8 to 1 / 15 of the circumference of the presser sheet 3. The remaining part of the periphery of the presser sheet 3 is not sutured to the bag body 2. Therefore, the presser sheet 3 can move freely relative to the bag body 2 with the suture portion 31 as its base end. That is, as shown in Figure 1(B), the opening 2H of the bag body 2 can be opened, or as shown in Figure 1(A), the opening 2H can be closed.

[0033] Furthermore, when the bag body 2 is positioned so that the opening 2H faces downwards, the retaining sheet 3 hangs down from the suture 31 by its own weight, effectively opening the opening 2H completely. With this configuration of the suture 31, the worker can position the bag body 2 so that the opening 2H faces downwards, and the retaining sheet 3 will naturally hang down, opening the opening 2H. This makes it easier to place the bag body 2 over the nest from above, lift the nest while inverting the bag body 2, and take the nest into the bag body. This allows for the nest to be taken into the bag body 2 with minimal spillage of nest components.

[0034] The retaining sheet 3 can be separate from the bag body 2. However, if the retaining sheet 3 is integrated with the bag body 2 by the suture 31, the opening 2H can be opened and closed while the retaining sheet 3 is connected to the bag body 2. Therefore, it is easy to remove nests. For example, after taking the nest into the bag body 2, it is easy to place the retaining sheet 3 over the nest. It is also easy to transport the nest removal bag 1 when ascending or descending to high places. Furthermore, when storing it in a warehouse or the like, the retaining sheet 3 will not separate from the bag body 2, preventing the loss of the retaining sheet 3. Note that other joining parts that do not rely on sutures may also be used; for example, the bag body 2 and the retaining sheet 3 may be joined with hook and loop fasteners.

[0035] The drawstring rope 4 is made of a strong twisted fiber and is provided to tighten the opening 2H when the presser sheet 3 is covering the opening 2H. The upper end 23 of the bag body 2, that is, the periphery of the opening 2H, is provided with a plurality of through holes 24 arranged at equal intervals in the circumferential direction. The drawstring rope 4 is inserted through the through holes 24. In this embodiment, the drawstring rope 4 and the through holes 24 are the means for tightening the opening 2H. The drawstring rope 4 is inserted from the inside of the bag body 2 through the through holes 24 to the outside, and then from the outside to the inside for the next through hole 24 in the circumferential direction. By pulling both ends 41 of the drawstring rope 4 and reducing the distance between the through holes 24, the opening 2H can be tightened. Alternatively, instead of the through holes 24, a drawstring type drawstring means may be provided, in which circumferential through holes are formed by folding and sewing the upper end 23 of the bag body 2, and the drawstring rope 4 is inserted through these circumferential through holes.

[0036] The shoulder strap 5 is a belt used by the worker to carry the bag body 2 on their back. The shoulder strap 5 consists of a pair of belt pieces attached in a loop shape to the back of the bottom 21 of the bag body 2. There are no limitations on the form of the shoulder strap 5; any form that is easy for the worker to carry is acceptable. In Figure 8, a shoulder strap 5 is shown as an example in which the pair of belt pieces are arranged in a V shape. After the worker has taken the nest into the bag body 2, they can use the shoulder strap 5 to carry the nest removal bag 1 on their back when taking the nest back. This leaves both of the worker's hands free, allowing for a smooth descent from a height.

[0037] Figure 3 shows the nest removal bag 1 being carried on the back of worker OP. The shoulder straps 5 are passed over worker OP's shoulders, and the bottom 21 of the bag body 2 faces the worker OP's back. The tightening rope 4 is pulled taut at its end 41, pushing the retaining sheet 3 inward into the bag body 2 and tightening the opening 2H. A fastening part 42 is formed at the pulled-out portion of the tightening rope 4, to which the tightening rope 4 is tied. Because the bag body 2 is short and cylindrical, it does not protrude much from the worker OP's back even when containing a nest.

[0038] With the bag body 2 being carried on the worker OP's back, the retaining sheet 3 is attached to the bag body 2 such that the seam 31 is located on the upper end of the bag body 2. In Figure 3, the seam 31 is hidden by the tightening of the tightening rope 4, but the seam 31 is located near the upper end of the bag body 2 being carried on the back. With this type of seam 31, when the bag body 2 is being carried on the worker OP's back, the retaining sheet 3 hangs down from the seam 31. In other words, the retaining sheet 3 naturally assumes a position that closes the opening 2H. Therefore, for example, when the worker OP descends from a height after removing the nest, the detachment of nesting components from the bag body 2 can be further suppressed.

[0039] [Example of using nest removal bags] Next, we will explain an example of using the nest removal bag 1 described above. Figures 4(A) to 6(C) show the procedure for removing a nest BN on a transmission tower 6 using the nest removal bag 1. The transmission tower 6 includes a main column member 61 that extends vertically, a horizontal member 62 that extends horizontally from the main column member 61 and connects a pair of main column members 61, and a reinforcing diagonal member 63. Figures 4 to 6 show an example in which a nest BN is built on the main column member 61 at the extension points of the horizontal member 62 and the diagonal member 63. The nest BN is generally circular in top view, has a dome shape with the central part bulging downwards, and the bottom surface of the nest is supported by the horizontal member 62.

[0040] The worker carries the nest removal bag 1 and climbs to the location where the nest BN is built on the transmission tower 6. The nest removal bag 1 can be carried in a rolled-up or folded state. Upon reaching the location of the nest BN, the worker places the nest removal bag 1 on top of the nest BN, as shown in Figure 4(A). The nest removal bag 1 is in a state where the tightening rope 4 is loosened so that the retaining sheet 3 is not restrained and the opening 2H of the bag body 2 is open. In this state, the nest removal bag 1 is inverted, that is, the opening 2H at the upper end 23 is turned downwards, and the nest removal bag 1 is placed over the nest BN from above. The retaining sheet 3 is hanging down.

[0041] Next, as shown in Figures 4(B) to (C), the worker encloses the nesting BN and brings it into the bag body 2 through the opening 2H. The eggs and chicks inside the nesting BN are protected by placing them in a separate storage bag brought by the worker. If any nesting components near the outer edge of the nesting BN, such as tree branches, are protruding from the covered area of ​​the opening 2H, the worker uses their fingers to tuck these protruding branches into the bag body 2. That is, as shown in Figure 4(C), with the nesting removal bag 1 placed over the nesting BN from above, any branches or other objects protruding from the nesting removal bag 1 are stuffed into the bag body 2 by the worker using their fingers.

[0042] As a result of the above procedure, the entire nesting BN is enclosed in the bag body 2. Next, the worker lifts the nesting BN while holding the nesting removal bag 1 with both hands to maintain the enclosed state of the nesting BN. If there are any parts of the nesting BN that are adhered to or engaged with the horizontal member 62 of the tower 6, the worker releases such adhesion or engagement. After that, as shown in Figure 5(A), the worker inverts the nesting removal bag 1. That is, the nesting removal bag 1 is rotated half a turn so that the opening 2H is facing upwards.

[0043] Thus, in this embodiment, the lifting (removal) of the nesting BN from the tower 6 and the placing of the nesting BN into the nesting removal bag 1 are performed almost simultaneously. For example, with a simple bucket-type nesting removal bag, two steps are required: first, lifting the nesting BN from the tower 6, and then placing the nesting BN into the bucket-type bag. When lifting the nesting BN, nesting components such as branches are likely to fall. Also, when placing the lifted nesting BN into the bag, nesting components may fall. However, by using the nesting removal bag 1 of this embodiment, the lifting and placing of the nesting BN into the bag can be achieved in one go, so the occurrence of falling objects can be greatly suppressed.

[0044] Next, as shown in Figure 5(B), the worker places the inverted nest removal bag 1 on the horizontal member 62. If any branches or other objects protrude from the bag body 2 during the inversion, they are pushed back into the bag body 2. Then, as shown in Figure 5(C), the worker closes the opening 2H with the retaining sheet 3 so as to press down on the nest BN from above. At this time, the outer edge of the retaining sheet 3 is pushed into the gap between the contained nest BN and the side 22 of the bag body 2 so that no gap is created between the retaining sheet 3 and the upper end 23 of the bag body 2.

[0045] Figure 6(A) shows the state after the opening 2H has been closed by the retaining sheet 3. At this stage, it is checked whether any nesting components are protruding from the bag body 2. If the nesting BN is properly contained within the bag body 2, the opening 2H is tightened using the tightening rope 4. That is, as shown in Figure 6(B), the worker pulls the rope end 41 to tighten the opening 2H so that its diameter becomes smaller. At this time, the worker pulls the rope end 41 while holding down the outer edge of the retaining sheet 3 so that the outer edge of the retaining sheet 3 goes below the height of the tightening rope 4. This operation causes the upper end 23 of the bag body 2 to overlap the outer edge of the retaining sheet 3 from above.

[0046] Finally, as shown in Figure 6(C), the worker makes a knot in the excess length of the rope end 41 created by the pulling, forming a fastening part 42. The fastening part 42 tightens the opening 2H and maintains a state in which the outer edge of the retaining sheet 3 is pressed by the tightening rope 4. In other words, the nesting BN contained in the bag body 2 is maintained in a state in which it is held down by the retaining sheet 3. After that, the worker puts the nesting removal bag 1 on their back using the shoulder belt 5. This carrying state is as shown in Figure 3. The worker descends from the tower 6 with the nesting removal bag 1 on their back. Since the nesting BN is completely enclosed in the bag body 2 and the retaining sheet 3, the nesting components will not scatter when descending from the tower.

[0047] [Examples of nest removal bags] Figures 7 to 14 show examples of the nest removal bag 1. The reference numerals in Figures 7 to 14 are the same as those in Figures 1 to 6. The nest removal bag 1 comprises a bag body 2, a retaining sheet 3, a drawstring rope 4, and a shoulder strap 5. Figure 7 is a front view of the nest removal bag 1. The top surface of the bag body 2, that is, the direction directly facing the retaining sheet 3, is treated as the front view. Figure 8 is a rear view of the nest removal bag 1, Figure 9 is a top view, Figure 10 is a right side view, Figure 11 is a left side view, Figure 12 is a bottom view, and Figure 13 is a perspective view.

[0048] Figure 14 is a perspective view of the nest removal bag 1 with the retaining sheet 3 open. The retaining sheet 3 is lifted upward with the seam 31 in the rotational position, exposing the opening 2H of the bag body 2. The rope end 41 of the tightening rope 4, which is routed circumferentially along the upper end 23 of the bag body 2, is located on the back side of the seam 31. The tightening rope 4 is not being pulled, and the opening 2H is in its widest state.

[0049] As described above, the nest removal bag 1 allows the entire nest BN to be taken into the bag body 2 through the opening 2H. For example, as illustrated in Figures 4 and 5, the nest BN can be taken into the bag body 2 by wrapping it around the opening 2H from above, and then the nest BN can be lifted up while the bag body 2 is inverted, thereby removing the nest BN from the tower 6. This prevents the falling and scattering of nest components when removing the nest BN from the tower 6. After taking in the nest BN, the opening 2H can be closed with the retaining sheet 3, and the opening 2H can be further tightened with the tightening rope 4. Therefore, the falling and scattering of nest components can also be prevented when descending from the tower 6 to the ground. [Explanation of Symbols]

[0050] OP (Operator) BN nesting 1 Nest removal bag 2 bags (main body) 2H opening 21 Bottom 22 Side 23 Top 24 Through-hole (aperture mechanism) 3. Pressing sheet 31 Suture part (joint part) 4. Tightening rope (tightening mechanism) 5. Shoulder straps 6 transmission towers

Claims

1. A nest removal bag for removing nests located at high places on structures, A bag body having a volume capable of accommodating a nest and an opening for taking in the nest, A retaining sheet that closes the aforementioned opening, With the aforementioned retaining sheet blocking the opening, a constricting means capable of constricting the opening, Equipped with, The bag body has a plurality of through holes at the periphery of the opening, The aforementioned throttling means is a throttling rope inserted through the plurality of through holes, The nest removal bag comprises a retaining sheet, a joint portion to which a part of the periphery of the retaining sheet is attached to the bag body, and an outer peripheral edge portion to which the upper end of the bag body overlaps from above when the opening is tightened by the tightening rope.

2. In the nest removal bag according to Claim 1, The aforementioned connecting portion has a configuration in which, when the bag body is positioned with the opening facing downwards, the retaining sheet hangs down from the connecting portion, substantially opening the opening, thus creating a nest removal bag.

3. In the nest removal bag according to claim 1 or 2, The bag body has a circular bottom and cylindrical sides extending upward from the periphery of the bottom, and the opening is located at the upper end of the sides, wherein the bag is a nest removal bag.

4. In the nest removal bag according to claim 3, The bag body has a shape in which the height of the sides is shorter than the diameter of the bottom, and this is a nest removal bag.

5. In the nest removal bag according to Claim 3, A nest removal bag further comprising a shoulder strap attached to the back of the bottom portion, for the worker to carry the bag on their back.

6. In the nest removal bag according to claim 5, A nest removal bag in which the retaining sheet is attached to the bag body such that the connecting part is located on the upper end side of the bag body when the bag body is carried on the back of the worker.

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