JP6654533B2 - Protection device and intrusion prevention body - Google Patents

Description

  The present invention relates to a protection device attached to a plant trunk to protect a plant from an organism to be controlled, such as an animal or an insect, and an intrusion prevention body used for the protection device.

  It has been frequently reported that seedlings such as fruit trees and young tree trunks are damaged by being bitten by small animals such as rats and being punctured by pests such as longhorn beetles. In particular, if the root of the trunk of a seedling is damaged by such small animals or pests, the seedlings often weaken and eventually die. Various measures have been taken for the purpose of controlling such control target organisms such as small animals and pests.

  For example, Patent Literature 1 discloses a control device for controlling longhorn beetles from fruit trees such as citrus and grape. According to FIG. 7 and FIG. 8 of Patent Document 1, the control device (7) is mounted by being wound around the root (A) of the fruit tree, and turns around the root (A) to partially overlap. Has a length of Further, a number of projecting pieces (7a) are provided inside the upper edge of the pest control tool (7). The protruding piece (7a) is a tongue piece formed thinner than the other parts, and the interval between the protruding pieces (7a) is set to a width that does not allow the hornet to enter. In order to attach the control device (7) to the base, the control device (7) is spread out and wound slightly above the base, and then the lower end (7b) is sunk into the soil. When it is pulled down downward, it is mounted with the protruding piece (7a) turned up. It should be noted that reference numerals in Patent Document 1 are shown in parentheses.

Japanese Utility Model Publication No. 49-105671

  Generally, the stem of a plant such as a seedling can have not only a simple columnar shape but also various unique shapes. For example, the trunk surface has irregularities or the trunk is bent. However, in the control device of Patent Document 1, the protruding piece is formed of a thin flat tongue piece that can be displaced only in the vertical direction. Therefore, there is a possibility that the pest control tool cannot cope with the peculiar shape of the trunk, and the invasion of the organism to be pested into the gap between the pest control tool and the trunk. For example, if there is a depression on the trunk surface, the protruding piece facing the depression may not be deformed (or insufficiently deformed) so as to turn upward without contacting the trunk surface. In such a case, a relatively large gap is formed between the protruding piece opposing the dent and the adjacent protruding piece deformed so as to turn upward, and there is a possibility that the target organism to be controlled can enter through the gap. there were. Further, in the pest controller of Patent Document 1, a plurality of flat tongue pieces are flexibly deformed so as to be turned up so as to close a gap between the trunk and the pest controller at the upper end. Therefore, most of the gap at the upper end is covered with the tongue piece, and heat is trapped inside the pest control device, and there is a risk that the trunk is unintentionally heated. For example, when the outside air temperature decreases in winter, the seedlings suspend their activities and sleep. On the other hand, the control device covering the trunk keeps the temperature of the trunk of the seedling at a temperature higher than the environmental temperature. Then, the root of the trunk of the seedling is maintained at a higher temperature than the natural environment in winter, and the dormancy of the seedling is prevented. Originally, when the seedlings resumed their activities at the time when they should be dormant, the growth of the seedlings was modulated, and as a result, there was a possibility that the plants would die. On the other hand, in summer, since the trunk of the seedling is exposed to a very high temperature inside the control device, the growth of the seedling is similarly modulated, which may result in death.

  The present invention has been made in order to solve the above-described problems, and its object is to suppress the influence of temperature on the coated trunk and to suppress the damage from the target organism more reliably than before. An object of the present invention is to provide a protection device and an intrusion prevention body used for the protection device.

The protection device according to claim 1 is a protection device attached to a trunk of a plant to protect the plant from an organism to be controlled such as a predetermined animal or insect,
Open at the upper and lower ends, a tubular body having a hollow cylindrical shape capable of surrounding the outer periphery of the trunk,
An intrusion prevention body that is disposed inside the tubular body and has a plurality of rod-shaped protrusions protruding from the inner peripheral surface of the tubular body,
In a state where the trunk is extrapolated to the tubular body, the plurality of rod-shaped projections are configured to surround the periphery of the trunk at an interval capable of restricting passage of the organism to be controlled.

  A protection device according to a second aspect is characterized in that, in the protection device according to the first aspect, the tubular body is configured as a divided piece that can be attached to the trunk from the outside in the radial direction.

  According to a third aspect of the present invention, in the protection device of the second aspect, the tubular body is formed so that the divided pieces are hingedly connected so as to form an opening in a part in the circumferential direction and can be expanded. It is characterized by becoming.

According to a fourth aspect of the present invention, there is provided the protection device according to the third aspect, wherein the intrusion prevention body projects from an annular band portion cut at a part in the circumferential direction and the entire inner peripheral surface of the band portion. A plurality of rod-shaped protrusions,
The band portion is deformable via the hinge portion so that the cut portion is expanded,
The hinge portion and the cut portion of the band-shaped portion are arranged so as to overlap with the hinge and the opening of the tubular body, respectively.

  A protection device according to a fifth aspect of the present invention is the protection device according to any one of the second to fourth aspects, further comprising an expansion prevention member mounted on the tubular body and configured to prevent separation or separation of the divided pieces. It is characterized by.

  The protection device according to claim 6 is the protection device according to claim 5, wherein the expansion prevention member is a substantially C-shaped band, and the expansion prevention member is fitted on the outer peripheral surface of the tubular body. It is characterized in that an outer peripheral concave portion for attaching is recessed.

  The protection device according to claim 7 is the protection device according to any one of claims 1 to 6, wherein the intrusion prevention body is configured as a separate body detachable from the tubular body. .

  The protection device according to claim 8 is the protection device according to claim 7, characterized in that an inner peripheral recess for accommodating the intrusion prevention body is formed in the inner peripheral surface of the tubular body. I do.

  According to a ninth aspect of the present invention, there is provided the protective device according to any one of the first to eighth aspects, wherein the tubular body is formed of a material containing a rat-proof component.

  The protection device according to claim 10 is the protection device according to any one of claims 1 to 9, wherein the intrusion prevention body is disposed at an upper end, a lower end, or both an upper end and a lower end of the tubular body. It is characterized by becoming.

The intrusion prevention body according to claim 11, which is open at the upper end and the lower end, is attached to a tubular body surrounding the outer periphery of the plant trunk, and a predetermined animal, insect, or the like is provided in a gap between the tubular body and the trunk. An intrusion prevention body for preventing an organism to be controlled from invading,
An annular band-shaped portion formed to be attachable to the inner peripheral surface of the tubular body and cut at a part in the circumferential direction,
A plurality of rod-shaped projections extending inward from the entire inner peripheral surface of the belt-shaped portion,
It is characterized in that a plurality of rod-shaped projections are arranged on the inner peripheral surface of the belt-shaped portion at intervals capable of restricting the passage of organisms to be controlled.

  According to the protection device of the first aspect, an intrusion prevention body having a plurality of rod-shaped projections extending from the inner peripheral surface thereof and capable of tilting in any direction is provided inside the tubular body for extrapolating the trunk. Is provided. Then, when the stem is extrapolated to the tubular body and the plurality of rod-shaped projections come into contact with the outer periphery of the trunk, each rod-shaped projection can be individually tilted and deformed in an arbitrary direction according to the outer peripheral shape of the trunk. That is, since each rod-like projection can be individually displaced in all directions, up, down, left, and right, according to the unevenness and bending of the opposing trunk outer periphery, the plurality of rod-like projections as a whole conform to the outer periphery shape of the trunk. To be deformed. Therefore, it is possible to prevent a relatively large gap from being formed between the adjacent rod-shaped protrusions. As a result, the plurality of rod-shaped projections surround the trunk at intervals capable of restricting the passage of the organism to be controlled, and prevent the organism to be controlled from entering the gap between the inner peripheral surface of the tubular body and the outer peripheral surface of the trunk. It can be reliably prevented. Further, since the intrusion prevention body is constituted by the plurality of rod-shaped projections, ventilation at the upper end or the lower end of the tubular body is ensured, and heat is prevented from being trapped inside the tubular body. Therefore, the protection device of the present invention can more reliably suppress the damage from the organism to be controlled than before, while suppressing the influence of the coated trunk on the temperature.

  According to the protection device of the second aspect, in addition to the effect of the first aspect, the tubular body is formed of the divided pieces that can be attached to the trunk from the outside in the radial direction, so that the trunk is sandwiched between the divided pieces, The trunk can be easily extrapolated to the tubular body.

  According to the protection device of the third aspect, in addition to the effects of the invention of the second aspect, the divided pieces are connected by hinges, so that the divided pieces are expanded via the hinges to be provided inside the divided pieces. By sandwiching the trunk and closing the divided pieces, the trunk can be easily extrapolated to the tubular body.

  According to the protection device of the fourth aspect, in addition to the effect of the invention of the third aspect, the hinge portion of the band-shaped portion and the cutting of the band-shaped portion in a state where the band-shaped portion of the intrusion prevention body is attached to the inner peripheral surface of the tubular body. The portions are arranged to overlap the hinge and the opening of the tubular body, respectively. Thereby, the intrusion prevention body and the tubular body are expanded and deformed together through the overlapping band-shaped hinge portion and the tubular body hinge, and the trunk is simultaneously extrapolated to both the tubular body and the intrusion prevention body. be able to. That is, the ease of attaching the protection device to the trunk is improved.

  According to the protection device of the fifth aspect, in addition to the effect of the invention of any one of the second to fourth aspects, by attaching the expansion preventing body to the tubular body where the divided bodies are combined, a tubular body is formed. Can easily be maintained.

  According to the protection device of the sixth aspect, in addition to the effect of the invention of the fifth aspect, the expansion prevention body is easily fitted to the tubular body by fitting the expansion prevention body into the outer peripheral concave portion of the tubular body. be able to.

  According to the protection device of the seventh aspect, in addition to the effects of the invention of any one of the first to sixth aspects, the tubular member is configured such that the intrusion prevention body is detachable from the tubular body. Each member can be replaced individually even if one of the body and the intrusion prevention body is damaged.

  According to the protection device of the eighth aspect, in addition to the effect of the invention of the seventh aspect, the intrusion prevention body is fitted to the inner peripheral concave portion of the tubular body, so that the intrusion prevention body is easily mounted on the tubular body. be able to.

  According to the protection device of the ninth aspect, in addition to the effects of the invention according to any one of the first to eighth aspects, since the tubular body is formed of a material containing a rat anti-mouse component, it is mainly a mouse. A repellent effect on small animals such as

  According to the protection device of the tenth aspect, in addition to the invention of any one of the seventh to ninth aspects, the intrusion prevention body is arranged at the upper end, the lower end, or both the upper end and the lower end of the tubular body. Thereby, invasion of the organism to be controlled can be prevented at the end of the tubular body.

  According to the intrusion prevention body according to the eleventh aspect, the inclining body is tilted in an arbitrary direction so as to extend inward from the entire inner peripheral surface of the annular band formed so as to be attachable to the inner peripheral surface of the tubular body. A plurality of possible rod-shaped projections are formed in a protruding manner. Then, the intrusion prevention body is attached to the tubular body extrapolating the trunk, and when the plurality of rod-shaped projections come into contact with the outer periphery of the trunk, each of the rod-shaped projections is individually set in any direction according to the outer peripheral shape of the trunk. Can be tilted and deformed. That is, since each rod-like projection can be individually displaced in all directions, up, down, left, and right, according to the unevenness and bending of the opposing trunk outer periphery, the plurality of rod-like projections as a whole conform to the outer periphery shape of the trunk. To be deformed. Therefore, it is possible to suppress the formation of a relatively large gap between the adjacent rod-shaped protrusions. As a result, the plurality of rod-shaped projections surround the trunk at intervals capable of restricting the passage of the organism to be controlled, and prevent the organism to be controlled from entering the gap between the inner peripheral surface of the tubular body and the outer peripheral surface of the trunk. It can be reliably prevented. In addition, since the intrusion prevention body includes a plurality of rod-shaped protrusions, ventilation at the upper end or the lower end of the tubular body is ensured, and heat is prevented from being trapped inside the tubular body. Therefore, the intrusion prevention body of the present invention, by being attached to the tubular body, can suppress the influence of the coated trunk from the temperature aspect, and can more reliably suppress the damage from the control target organism than before. It is.

1 is a schematic perspective view of a protection device according to an embodiment of the present invention. The top view of the protection device of FIG. FIG. 3A is a front view, FIG. 3B is a side view, and FIG. (A) AA sectional drawing and (b) BB sectional drawing of the protection device of FIG. FIG. 2 is a perspective view of a tubular body of the protection device of FIG. 1. FIG. 6A is a plan view of the tubular body of FIG. 5 in a closed state, and FIG. (A) Front view, (b) Side view, and (c) Back view of the tubular body of FIG. FIG. 2 is a perspective view of an intrusion prevention body of the protection device of FIG. 1. 9A is a plan view, FIG. 8B is a front view, FIG. 9C is a rear view, FIG. 9D is a side view, and FIG. FIG. 2 is a perspective view of an expansion preventing body of the protection device of FIG. 1. 11A is a plan view, FIG. 10B is a front view, FIG. 10C is a rear view, and FIG. FIG. 2 is an exploded perspective view of the protection device of FIG. 1. It is the schematic explaining the process which attaches the protection apparatus of this embodiment to the trunk | stem of a plant, (a) It shows the process of inserting a trunk | truck inside an expanded tubular body and an intrusion prevention body, (b) Trunk. The step of attaching the expansion preventing body to the tubular body into which is inserted is shown. 1 is a schematic perspective view of a protection structure according to an embodiment of the present invention. FIG. 15 is a longitudinal sectional view of the protection structure in FIG. 14. FIG. 15 is a DD cross-sectional view of the protection structure of FIG. 14. The schematic diagram of the protection structure which shows the example which attached the protection device of this embodiment to the trunk of various natural shapes. FIG. 6 is a longitudinal sectional view of a protection structure showing another example of use of the protection device of the present embodiment. The exploded perspective view of the protection device of another example of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that the shape of each drawing referred to in the following description is a conceptual diagram or a schematic diagram for describing a suitable shape and size, and the dimensional ratio and the like do not always match the actual dimensional ratio. That is, the present invention is not limited to the dimensional ratios in the drawings.

  The protection device 100 according to one embodiment of the present invention is attached to a trunk of a plant and protects the plant from so-called “control target organisms” which are targets for control that causes damage to the plant. In the protection device 100 according to the present embodiment described below, the “plant” to be protected is an apple seedling or a young tree, and the “control target organism” is a mouse. The “control target organism” rat is a small animal having a body length of about 10 cm. In general, rats are known to bite the bark near the roots of apple seedlings and young tree trunks due to their behavior. Apple seedlings and young trees often die when their trunks are bitten. The protection device 100 of the present embodiment is configured to protect apple seedlings from damage of small animals, mainly mice. However, the technical idea of the present invention is not limited to apple seedlings / saplings, but other fruits, trees, vegetables, plants such as flowers, and other animals not limited to rats (eg, rabbits, deer, etc.), birds The present invention is also applicable to an organism to be controlled such as a woodpecker (eg, a woodpecker) or an insect (eg, a longhorn beetle), and it is needless to say that the present invention is not limited to the embodiments described below. Further, the "stem" of the present invention is a concept including not only the main trunk of a tree but also a stem of a plant and large and small branches branched from the main trunk.

  FIG. 1 is a schematic perspective view of a protection device 100 according to one embodiment of the present invention. FIG. 2 is a schematic plan view of the protection device 100. 3A to 3C are a front view, a side view, and a rear view of the protection device 100. FIG. FIG. 4 is an AA sectional view and a BB sectional view of the protection device 100.

  As shown in FIGS. 1 to 3, the protection device 100 is open at the upper end and the lower end, and has a tubular body 110 having a hollow cylindrical shape capable of surrounding the outer periphery of a trunk T of a plant (apple seedling or sapling). An intrusion prevention body 120 disposed inside at the upper end of the body 110 and having a plurality of rod-shaped protrusions 125 extending from the inner circumferential surface of the tubular body 110 toward the central axis, and an expansion attached to the outer circumferential surface of the tubular body 110 And a preventive body 130. As shown in FIG. 4, the intrusion prevention body 120 is disposed at the upper end inside the tubular body 110, and the spread prevention body 130 is mounted on the outer peripheral surface of the tubular body 110. Hereinafter, each component (the tubular body 110, the intrusion prevention body 120, and the expansion prevention body 130) that configures the protection device 100 of the present embodiment will be described.

  First, a tubular body 110, which is a component of the protection device 100 of the present embodiment, will be described with reference to FIGS. FIG. 5 is a perspective view of the tubular body 110. 6A and 6B are plan views of the tubular body 110 in the closed state and the open state. FIGS. 7A to 7C are a front view, a rear view, and a side view of the tubular body 110.

  As shown in FIG. 5, the tubular body 110 is formed by processing a corrugated flexible tube made of synthetic resin. That is, the tubular body 110 has a hollow cylindrical shape that opens in the upper and lower ends and extends in the axial direction. The outer peripheral surface and the inner peripheral surface of the tubular body 110 are continuously formed with peaks and valleys alternately in the axial direction. The ridges on the outer peripheral surface and the valleys on the inner peripheral surface of the tubular body 110 are in a front-back relationship. In the present embodiment, the trough (between the peaks) on the outer peripheral surface of the tubular body 110 is defined as the outer concave portion 114, and the trough on the inner peripheral surface (between the peaks) is defined as the inner peripheral concave portion 115.

  Further, the tubular body 110 is formed by combining a pair of divided bodies 111, 111 obtained by dividing a cylinder into two in the longitudinal axis direction so that the tubular body 110 can be attached (extrapolated) to the trunk T from outside in the radial direction. On the back surface of the tubular body 110, the pair of divided bodies 111, 111 are pivotally connected at one end in the circumferential direction by hinges 113 (see FIGS. 6 and 7C). The hinge 113 is formed to bend in a substantially W-shape in plan view at a part in the circumferential direction of the tubular body 110. The hinge 113 extends continuously and linearly along the axial direction in the entire axial direction of the tubular body 110. In the tubular body 110 of the present embodiment, the divided bodies 111, 111 and the hinge 113 are integrally formed of a synthetic resin.

  Each divided body 111 has an opening edge 112 on the opposite side of the hinge 113 in the circumferential direction. At the front of the tubular body 110, each opening edge 112 extends continuously and linearly along the longitudinal axis of the tubular body 110 (see FIGS. 6 and 7A). In other words, the pair of divided bodies 111, 111 (opening edges 112, 112) can be formed by cutting the tubular body 110 along the longitudinal axis. In the initial configuration of the tubular body 110, the opposed opening edges 112, 112 come close to or abut each other, and the tubular body 110 is substantially closed in the circumferential direction. When the pair of divided bodies 111 and 111 rotate through the hinge 113, the opening edges 112 and 112 are separated from each other and expand (see FIGS. 6A and 6B). That is, by expanding the diameter of the tubular body 110, the opening 116 can be formed between the opening edges 112. The opening 116 is a part of the circumferential direction of the tubular body 110 and is located on the opposite side of the hinge 113. On the other hand, when the tubular body 110 is reduced in diameter through the hinge 113 from the state where the tubular body 110 is expanded, the opening 116 can be closed.

  The tubular body 110 of the present embodiment is formed of a material (synthetic resin) containing a rat-proof component in order to exhibit a repellent effect on rats. Specifically, the tubular body 110 is a synthetic resin molded body containing a microcapsulated capsaicin or a rat-proof component such as cycloheximide. Then, by mixing microcapsules containing a rat-proof component into the synthetic resin, the repellent effect against rats can be maintained.

  In the present embodiment, the dimensions of the tubular body 110 are determined so as to cover the vicinity of the root of the apple seedling P. More specifically, the length of the tubular body 110 is about 600 to 700 mm, and the diameter is about 50 to 60 mm. However, the dimensions of the tubular body can be arbitrarily selected according to the type of plant or tree to be protected, the location to be covered, the purpose, and the like. Further, the tubular body of the present invention does not need to contain a rat-proof component, and may be made of a general synthetic resin or another material such as a metal.

  With reference to FIG. 8 and FIG. 9, the intrusion prevention body 120 as one component of the protection device 100 of the present embodiment will be described. FIG. 8 is a perspective view of the intrusion prevention body 120. FIGS. 9A to 9D are a plan view, a front view, a rear view, and a side view of the intrusion prevention body 120.

  As shown in FIGS. 8 and 9, the intrusion prevention body 120 includes an annular band-shaped portion 121 cut at a part in the circumferential direction, and a plurality of rod-shaped protrusions 125 extending from the entire inner peripheral surface of the band-shaped portion 121. And.

  The band-shaped portion 121 has a size that can be accommodated or fitted into the inner peripheral concave portion 115 of the tubular body 110 from inside. That is, the outer diameter of the strip 121 corresponds to the inner diameter of the inner recess 115 of the tubular body 110, and the width of the strip 121 corresponds to the width (in the vertical direction) of the inner recess 115. Preferably, the outer diameter of the strip 121 is slightly larger than the inner diameter of the inner recess 115, so that the strip 121 elastically reduced in diameter can be integrally held in the inner recess 115. Becomes

  Further, a cutting portion 122 is provided on a part of the belt-shaped portion 121 in the circumferential direction so as to cut the ring. That is, both ends in the circumferential direction of the band-shaped portion 121 are slightly separated from each other with the cut portion 122 therebetween. On the other hand, a hinge portion 123 is formed on a part of the belt-shaped portion 121 in the circumferential direction and opposite to the cut portion 122. That is, the band-shaped portion 121 is elastically deformable in a direction in which both ends in the circumferential direction approach or separate from each other via the hinge portion 123. The hinge portion 123 is formed integrally with the band portion 121 and is bent in a substantially W shape. The hinge portion 123 has a shape that can be superimposed on the hinge 113 of the tubular body 110. That is, similarly to the tubular body 110, the band-shaped portion 121 can be expanded and deformed via the hinge portion 123 so as to expand the cut portion 122.

  The plurality of rod-shaped protrusions 125 are formed so as to protrude toward the center from the entire circumferential direction of the inner peripheral surface of the band-shaped portion 121 at intervals that can restrict the passage of organisms (rats) to be controlled. Each rod-shaped protrusion 125 is a tapered cone (needle) having a small diameter, but may be an elongated column having a uniform diameter. The tip of the rod-like projection 125 is rounded so as not to damage the bark. Each rod-shaped protrusion 125 has a predetermined length, and can be elastically tilted in an arbitrary direction. In particular, since each of the rod-shaped protrusions 125 has a certain degree of rigidity, the rod-shaped protrusions 125 are easily tilted and deformed around their roots. In the present embodiment, the plurality of rod-shaped projections 125 are regularly arranged in the circumferential direction at substantially constant intervals (about 5 mm). On the other hand, as shown in FIG. 9E, the plurality of rod-shaped protrusions 125 are arranged stepwise in the width direction. That is, in the adjacent rod-shaped protrusions 125, the position of the base and the extending direction are slightly different in the vertical direction. Since the plurality of rod-shaped projections 125 are arranged offset in the width direction in this manner, it becomes possible to flexibly cope with the natural shape of the stem T that is curved variously.

  A substantially circular insertion portion 126 for inserting the trunk T at the center of the band-shaped portion 121 is formed by the tips of the plurality of rod-shaped projections 125. It is preferable that each of the rod-shaped protrusions 125 has a length capable of contacting the outer peripheral surface of the trunk T when the rod-shaped protrusion 125 is attached to the tubular body 110. In other words, the diameter of the substantially circular insertion portion 126 is determined to be smaller than the plant stem T so that the tip of each rod-shaped protrusion 125 abuts on the outer peripheral surface of the stem T when the stem T is inserted into the insertion portion 126. Preferably. In the present embodiment, the diameter of the insertion portion 126 is about 30 to 35 mm.

  In the present embodiment, the length of the rod-shaped projection 125 is about 10 to 20 mm, and the diameter thereof is about 2 to 3 mm. However, the rod-shaped projection of the present invention is not limited to the above dimensions, and the dimensions can be arbitrarily selected. Further, in the present embodiment, the intrusion prevention body 120 is integrally formed of a synthetic resin. That is, the band-shaped portion 121 and the bar-shaped protrusion 125 are formed integrally. However, the band-shaped portion and the rod-shaped protrusion of the intrusion prevention body of the present invention may be formed of different materials (for example, synthetic resin and metal), and the present invention is not limited to this embodiment.

  With reference to FIG. 10 and FIG. 11, the expansion prevention member 130 as one component of the protection device 100 of the present embodiment will be described. FIG. 10 is a perspective view of the expansion preventing body 130. FIGS. 10A to 10D are a plan view, a front view, a rear view, and a side view of the expansion preventing body 130.

  As shown in FIGS. 10 and 11, the expansion preventing body 130 is a substantially C-shaped band, is mounted on the outer peripheral recess 114 of the tubular body 110, and expands (or separates) the divided pieces 111, 111. Function to prevent The expansion prevention member 130 includes a curved holding plate 131 curved in an arc shape in a plan view, and a ridge 132 projecting from an inner peripheral surface of the holding plate 131. In the present embodiment, the expansion preventing member 130 is integrally formed of a synthetic resin, but the material thereof can be arbitrarily selected.

  The holding plate 131 is elastically deformable in a direction in which both ends thereof approach or separate from each other. The holding plate 131 has a length capable of gripping the tubular body 110 from the outer peripheral surface, and has an arc angle larger than at least 180 degrees. Further, the width of the holding plate 131 is larger than the width of the outer peripheral recess 114. On the other hand, the ridge 132 continuously projects in the circumferential direction over the entire circumference of the holding plate 131. The ridge 132 is located substantially at the center in the width direction of the holding plate 131, and its width is smaller than the width of the holding plate 131. In particular, the width of the holding plate 131 is determined so that it can be accommodated or fitted in the outer peripheral recess 114 of the tubular body 110, and is slightly smaller than the width of the outer peripheral recess 114. A deformation assisting portion 133 is recessed substantially at the center of the ridge 132 in the circumferential direction. The deformation assisting portion 133 also functions to assist the elastic deformation of the sandwiching plate 131 in the diameter increasing and reducing directions. Further, the outer peripheral surface near the front end in the circumferential direction of the holding plate 131 is unevenly processed so as to prevent a worker from handling the holding plate 131 by slipping.

  The configuration of the protection device 100 will be described in more detail based on the above description of each component.

  As shown in FIG. 1 and FIG. 4B, an intrusion prevention body 120 is accommodated in an inner peripheral concave portion 115 at the upper end of the tubular body 110, thereby preventing invasion of an organism to be controlled from the upper end opening of the tubular body 110. As shown in FIG. 4A, in the inner peripheral recess 115, the outer peripheral surface of the band-shaped portion 121 of the intrusion prevention body 120 is in contact with the inner peripheral surface of the tubular body 110. More specifically, the hinge portion 123 and the cut portion 122 of the band portion 121 are arranged so as to overlap the hinge 113 and the opening edge portion 112 of the tubular body 110, respectively. At this time, since the belt-like portion 121 is slightly elastically deformed in the diameter reducing direction, the outer peripheral surface of the belt-like portion 121 is urged against the inner peripheral surface of the tubular body 110 by the elastic return force. Further, as shown in FIG. 4B, since the band-shaped portion 121 is fitted in the inner peripheral concave portion 115 formed between the peaks of the inner peripheral surface of the tubular body 110, the longitudinal direction of the band-shaped portion 121 is Movement is regulated. Thus, the intrusion prevention body 120 is integrally held by the tubular body 110. Therefore, when the expansion preventing member 130 is not attached to the tubular member 110, the tubular member 110 and the intrusion preventing member 120 can be deformed so as to expand simultaneously.

  As shown in FIG. 3, two expansion preventing members 130 are mounted on the outer peripheral surface of the tubular body 110. The two expansion preventing members 130 are arranged on the upper end side and the lower end side of the tubular body 110 so as to be separated from each other. As shown in FIG. 4A, the inner surface of the holding plate 131 of the expansion preventing member 130 contacts the outer peripheral surface of the ridge of the tubular body 110, and covers the outer peripheral direction of the tubular body 110 for more than half of the circumferential direction. . At this time, since the holding plate 131 is slightly elastically deformed in the radially expanding direction, the inner peripheral surface of the holding plate 131 is urged against the outer peripheral surface of the tubular body 110 by the elastic return force. And as shown in FIG.4 (b), the protrusion 132 is accommodated in the outer peripheral recessed part 114 formed between the peak parts. Thus, the movement of the expansion preventing member 130 in the longitudinal direction with respect to the tubular body 110 is restricted. As described above, the expansion preventing body 130 is integrally held by the tubular body 110. That is, by attaching the expansion preventing body 130 to the outer peripheral surface of the tubular body 110, the tubular body 110 and the intrusion preventing body 120 can be maintained in a state where they do not expand. In the present embodiment, since the tubular body 110 is formed of a corrugated flexible tube, it is difficult to completely match or join the opening edges 112 of the divided pieces 111 with each other in terms of structure. In other words, the opening 116 is closed with the opening edges 112 of the divided pieces 111 slightly shifted from each other. That is, small slits (or gaps) are formed on the surface of the tubular body 110 so that the organism to be controlled cannot enter, so that the air permeability inside and outside the tubular body 110 is improved. Thus, the degree of heat accumulation inside the tubular body 110 can be reduced.

  Then, in the protection device 100 in which the respective constituent members are combined, as shown in FIG. 4A, a plurality of rod-shaped protrusions are formed at the upper end from the inner peripheral surface of the tubular body 110 in order to restrict the passage of the organism to be controlled. The body 125 protrudes, and a circular insertion portion 126 for inserting the trunk T is defined by the tips of the plurality of rod-shaped projections 125.

  Next, a method of attaching the protection device 100 to the trunk T of the apple seedling while assembling the protection device 100 with each component will be described with reference to FIGS.

  FIG. 12 is an exploded perspective view of the protection device 100. As shown in FIG. 12, the tubular body 110, the intrusion prevention body 120, and the expansion prevention body 130 are configured separately, and the protection device is provided by attaching the intrusion prevention body 120 and the expansion prevention body 130 to the tubular body 110. 100 is completed.

  First, as shown in FIG. 12, the opening 116 of the tubular body 110 is expanded, and the intrusion prevention body 120 is disposed inside the tubular body 110 through the opening 116. At this time, the intrusion prevention body 120 is deformed so as to slightly reduce the diameter, and the intrusion prevention body 120 is housed in the inner peripheral recess 115 so that the hinge 113 and the hinge portion 123 overlap. After the accommodation, the intrusion prevention body 120 is elastically returned, so that the outer peripheral surface of the band-shaped portion 121 of the intrusion prevention body 120 adheres to the inner peripheral surface of the inner peripheral recess 115. In the present embodiment, the innermost recess 115 on the uppermost side of the tubular body 110 is selected, but can be changed as appropriate.

  Then, as shown in FIG. 13A, the integrated tubular body 110 and the intrusion prevention body 120 are simultaneously expanded and deformed, and the opening 116 (and the cut portion 122) is expanded to be larger than the diameter of the trunk T. Let it. Next, the expanded tubular body 110 is moved toward the trunk T from the outside in the radial direction, and the trunk T is disposed in the insertion portion 126 of the intrusion prevention body 120 through the opening 116. After the trunk T is arranged inside the tubular body 110 (and the intrusion prevention body 120), the tubular body 110 and the intrusion prevention body 120 are reduced in diameter so as to close the opening 116. Subsequently, as shown in FIG. 13 (b), a state where the opening 116 of the tubular body 110 is closed is maintained by mounting the plurality of expansion preventing bodies 130 from the outside in the radial direction of the tubular body 110. Thus, the protection device 100 is attached to the trunk T of the apple seedling, and the protection structure 10 is constructed.

  FIG. 14 is a perspective view of the protection structure 10 in which the protection device 100 of the present embodiment is mounted on the trunk T of an apple seedling. FIG. 15 is a schematic longitudinal sectional view of the protection structure 10. As shown in FIG. FIG. 16 is a cross-sectional view of the protection structure 10 taken along the line DD.

  As shown in FIG. 14, in the protection structure 10, the protection device 100 is attached to the root of the trunk T of the apple seedling. More specifically, the tubular body 110 interpolates the trunk T and covers the root from the outer periphery. Then, the expansion preventing body 130 is attached to the tubular body 110, and the state in which the opening 116 is closed is maintained without the surface of the trunk T being exposed to the outside. In addition, a pillar P is provided upright beside the seedling and the protection device 100. A string is tied around the support P and the trunk T of the seedling.

  As shown in FIG. 15, the lower end of the tubular body 110 is closed by being embedded in the soil. That is, since the lower end opening of the tubular body 110 is closed by the soil, the intrusion of the rat from the lower end of the tubular body 110 is prevented. At this time, since the uneven shape of the tubular body 110 digs into the soil, the tubular body 110 becomes difficult to fall out of the soil.

  On the other hand, an intrusion prevention body 120 is arranged near the upper end of the tubular body 110, and the intrusion of a rat from the upper end of the tubular body 110 is regulated by the plurality of rod-shaped protrusions 125 of the intrusion prevention body 120. In particular, in an area where there is a lot of snow, which is a major production area of apples, it is supposed that rats enter the inside of the tubular body 110 from above the snow accumulated at the roots of the seedlings. By arranging, the protection device 100 effectively prevents the invasion of the rat.

  As shown in FIG. 16, a trunk T is arranged to penetrate through an insertion portion 126 formed at the tip of a plurality of rod-shaped protrusions 125. Further, the rod-shaped projections 125 are arranged such that the distal end thereof comes into contact with the outer peripheral surface of the trunk T. Each of the rod-shaped protrusions 125 abuts on the surface of the trunk T with a force that does not damage the bark of the trunk T in a posture tilted in the vertical and horizontal directions as necessary. When the rod-shaped protrusion 125 having rigidity comes into contact with the surface of the trunk T with a certain force, a frictional force is generated at a contact portion between the rod-shaped protrusion 125 and the trunk T. Therefore, the rod-shaped projection 125 extends as if it was stretched between the inner peripheral surface of the tubular body 110 and the surface of the trunk T, and the posture in which it abuts can be sufficiently maintained. In other words, the rodent that is about to enter from the upper end of the tubular body 110 can be firmly repelled by the rod-like projection 125. Moreover, in the protective structure 10 of the present embodiment, since the tubular body 110 contains a rat-proof component, an effect of repelling rats away from the seedlings is exhibited. Further, in the protection structure 10, although not shown, a rat-proof sheet (a resin sheet containing microcapsules containing a rat-proof component such as capsaicin) is optionally laid on the soil so as to surround the tubular body 110 or the root of the seedling. By doing so, it is possible to more effectively protect the seedlings from rats.

  In addition, at the position where the intrusion prevention body 120 is arranged, there are only a plurality of elongated rod-like projections 125 between the inner peripheral surface of the tubular body 110 (or the band-like portion 121) and the outer peripheral surface of the trunk T. Compared to the state where the upper end of the tubular body 110 is completely open, the area in which all the rod-shaped protrusions 125 occupy the gap between the inner peripheral surface of the tubular body 110 and the outer peripheral surface of the trunk T is very small in a plane. Is evident. Therefore, the heat inside the tubular body 110 can escape from the upper end opening of the tubular body 110 through the gap between the rod-shaped protrusions 125. Furthermore, since the plurality of bar-shaped protrusions 125 are vertically offset and the occupied area of the bar-shaped protrusions 125 on the same plane is relatively small, the protection device 100 of the present embodiment has heat inside the tubular body 110. Even more care has been taken to ensure that there is no congestion. The above-mentioned slit (shift) between the opening edges 112 also contributes to releasing heat from the inside of the tubular body 110.

  FIG. 16 shows an ideal circular cross section of the trunk T, but FIG. 17 shows an example of the trunk T that can take various shapes as a natural shape. For example, the trunk T1 shown in FIG. 17A has a bump like a bump on the surface. In FIG. 17A, the tip of the rod-shaped projection 125 contacts the surface of the trunk T1 such that the amount of tilt of the rod-shaped projection 125 facing the protrusion of the trunk T1 in any direction (up, down, left and right) is increased. For example, the trunk T2 shown in FIG. 17B is thicker than the trunk T and is partially concave. In FIG. 17B, the rod-shaped protrusion 125 is in contact with the surface of the trunk T2 while being tilted in an arbitrary direction so as to correspond to the large diameter of the trunk T2. On the other hand, at a portion where the surface is concave, the rod-shaped protrusion 125 is in contact with the surface of the trunk T2 so that the degree of tilt is reduced. That is, as illustrated, since the rod-shaped protrusion 125 can be freely tilted up, down, left, and right, it can contact the trunk surface in a state of being tilted at an arbitrary angle according to the natural shape of the trunk. This makes it possible to more reliably prevent the rat from entering the tubular body 110 without creating a gap through which the rat can pass.

  FIG. 18 shows another usage example of the protection device 100 of the present embodiment. In FIG. 18, in the protection structure 10 ′ and the protection device 100 ′, the intrusion prevention bodies 120, 120 are attached to both the upper end and the lower end of the tubular body 110. The lower end of the tubular body 110 is placed on the soil. That is, when the soil is hard and a part of the tubular body 110 cannot be buried in the ground, the intrusion preventive body 120 is arranged at the lower end of the tubular body 110, so that the intrusion of the rat from the opening at the lower end of the tubular body 110 is effectively prevented. Can be prevented. In addition, although not shown, in a specific situation, the intrusion prevention body 120 may be arranged only at the lower end of the tubular body 110.

  Hereinafter, the operation and effect of the protection device 100 according to the embodiment of the present invention will be described.

  According to the protection device 100 of the present embodiment, the intrusion prevention body 120 is disposed at the upper end and / or the lower end of the tubular body 110, and the inside of the tubular body 110 for extrapolating the trunk T has substantially the entire inner peripheral surface. A plurality of rod-shaped protrusions 125 extending from the periphery toward the center are formed. The rod-shaped protrusion 125 has a predetermined rigidity and can be elastically tilted in an arbitrary direction. Then, when the stem T is extrapolated to the tubular body 110 and the plurality of rod-shaped projections 125 abut on the outer peripheral surface of the trunk T, each rod-shaped projection 125 is individually moved in any direction according to the outer peripheral shape of the trunk T. Can be tilted and deformed. That is, since each rod-like projection 125 can be individually displaced in all directions, up, down, left, and right, according to the unevenness and bending of the outer periphery of the trunk T facing the rod-like projections 125, the plurality of rod-like projections 125 as a whole To fit the outer shape of the stem and various outer diameters of the trunk T. Therefore, the formation of a relatively large gap between the adjacent rod-shaped protrusions 125 is suppressed. As a result, the plurality of rod-shaped projections 125 surround the periphery of the trunk T at an interval capable of restricting passage of a mouse as an organism to be controlled, and form a gap between the inner peripheral surface of the tubular body 110 and the outer peripheral surface of the trunk T. It is possible to reliably prevent mice from entering. Further, since the intrusion prevention body 120 is constituted by the plurality of rod-shaped protrusions 125, the ventilation at the upper end or the lower end of the tubular body 110 is smaller than when the upper end opening is closed by a flat tongue as in the related art. Thus, heat is prevented from staying inside the tubular body 110. Therefore, the protection device 100 of the present embodiment can more reliably suppress the damage from the control target organisms than before, while suppressing the temperature of the coated trunk T from being affected.

[Modification]
The present invention is not limited to the above embodiment, and can take various modifications. Hereinafter, modified examples of the present invention will be described. Note that, in the modified example, components having the same last two digits among components indicated by three digits have the same or similar features unless otherwise described, and a description thereof will be partially omitted.

(1) The protection device of the present invention is not limited to the protection device 100 of the above embodiment. For example, FIG. 19 shows a protection device 200 according to another embodiment of the present invention. As shown in FIG. 19, the protection device 200 includes a tubular body 210 including completely separated divided bodies 211 and 211, and is disposed inside the tubular body 210 and integrally protrudes from an inner peripheral surface of the tubular body 210. It comprises an intrusion prevention body 220 having a plurality of rod-shaped protrusions 225 that can be tilted in any direction, and an expansion prevention body 230 connecting the divided bodies 211 and 211. That is, in the protection device 200, unlike the protection device 100 of the above-described embodiment, the tubular body 210 and the intrusion prevention body 220 (comprising a plurality of rod-shaped protrusions 225) are integrally formed. Further, no irregularities are provided on the inner peripheral surface and the outer peripheral surface of the tubular body 210. When the protection device 200 is attached to the trunk of the plant, the plurality of rod-shaped projections 225 surround the trunk at intervals capable of restricting the passage of the organism to be controlled in a state where the trunk is extrapolated to the tubular body 210. With such a configuration, the function and effect of the protection device of the present invention can be sufficiently exhibited. That is, it goes without saying that those skilled in the art can arbitrarily modify the shape and form of each component of the protection device within the technical scope of the present invention.

(2) The expansion preventing body of the protection device of the present invention is not limited to the above embodiment, and may be changed to, for example, a string or a rubber band. Alternatively, an engagement claw or the like for connecting the two may be integrally provided at the opening edge of the divided piece as an expansion prevention member.

(3) The control target organisms intended by the present invention are not limited to the rats of the above embodiment. That is, the protection device of the present invention can cope with various living things by changing the gap or the like between the rod-shaped protrusions. For example, when an insect to be controlled is an insect, increasing the number of rod-shaped projections and shortening the interval can prevent insects from entering the tubular body and damaging plants. Alternatively, when the target organism is a relatively large animal such as a fawn, damage to plants can be prevented by reducing the number of rod-shaped projections and increasing the diameter of the rod-shaped projections to increase the strength. Also, by changing the size of the protection device, it is possible to cope with large trees and plants.

  The present invention is not limited to the above-described embodiments and modified examples, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

REFERENCE SIGNS LIST 100 Protective device 110 Tubular body 111 Divided piece 112 Opening edge 113 Hinge 114 Outer circumferential recess 115 Inner circumferential recess 116 Opening 120 Intrusion prevention body 121 Strip portion 122 Cutting portion 123 Hinge portion 125 Bar-shaped projection 126 Insertion portion 130 Spread prevention body 131 Clamping plate 132 Protrusion 133 Deformation assisting part T Stem of plant (apple seedling)

Claims (11)

A protection device attached to the stem of a plant to protect the plant from an organism to be controlled such as a predetermined animal or insect,
Open at the upper end and lower end, a tubular body having a hollow cylindrical shape capable of surrounding the outer periphery of the trunk,
An intrusion prevention body that is disposed inside the tubular body and has a plurality of rod-shaped protrusions protruding from the inner peripheral surface of the tubular body,
In a state where the trunk is extrapolated to the tubular body, the plurality of rod-shaped projections are configured to surround the periphery of the trunk at intervals that can regulate the passage of the organism to be controlled. Protective device.   2. The protection device according to claim 1, wherein the tubular body is configured as a split piece that can be attached to the trunk from the outside in the radial direction. 3.   The protection device according to claim 2, wherein the tubular body is formed such that the divided pieces are connected by a hinge so as to form an opening in a part in a circumferential direction and can be opened. The intrusion prevention body includes an annular band portion cut in a part in the circumferential direction, and the plurality of rod-shaped protrusions protruding from the entire inner peripheral surface of the band portion,
The band-shaped portion is deformable via a hinge portion so that the cut portion is expanded,
The protection device according to claim 3, wherein the hinge portion and the cut portion of the band-shaped portion are arranged so as to overlap with the hinge and the opening of the tubular body, respectively.   The protection device according to any one of claims 2 to 4, further comprising: an expansion prevention member attached to the tubular body and configured to prevent separation or separation of the divided pieces.   The expansion prevention member is a substantially C-shaped band, and an outer peripheral recess for fitting the expansion prevention member is formed in the outer peripheral surface of the tubular body. The protection device according to claim 5.   The protection device according to any one of claims 1 to 6, wherein the intrusion prevention body is configured as a separate body detachable from the tubular body.   The protection device according to claim 7, wherein an inner peripheral concave portion for accommodating the intrusion prevention body is formed in an inner peripheral surface of the tubular body.   The protection device according to any one of claims 1 to 8, wherein the tubular body is formed of a material containing a rat-proof component.   The protection device according to any one of claims 1 to 9, wherein the intrusion prevention body is arranged at an upper end, a lower end, or both an upper end and a lower end of the tubular body. Opened at the upper and lower ends, attached to a tubular body surrounding the outer periphery of the trunk of a plant, preventing a target organism such as a predetermined animal or insect from entering a gap between the tubular body and the stem. Intrusion prevention body for
An annular band-shaped portion formed so as to be attachable to the inner peripheral surface of the tubular body and cut at a part in the circumferential direction,
The plurality of rod-shaped projections extending inward from the entire inner peripheral surface of the band-shaped portion,
The intrusion prevention body, wherein the plurality of rod-shaped projections are arranged on the inner peripheral surface of the band-shaped portion at intervals capable of restricting passage of the organism to be controlled.

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