JP3191483U - Bark protection tape - Google Patents

Abstract

An object of the present invention is to provide a bark protection tape that can maintain a state wound around a tree for a long period of time and can be easily attached.
A bark protection tape A includes a plurality of chain braids 1 knitted in the warp direction by yarns made of a biodegradable synthetic resin material, arranged at predetermined intervals, and a connecting yarn made of a biodegradable synthetic resin material. 2 with a predetermined interval in the warp direction in a state where tape-shaped knitted bodies B knitted in a mesh shape are alternately overlapped in the weft direction with an interval between adjacent chain stitch rows 1 The chain braided rows 1 are partially entangled and formed integrally.
[Selection] Figure 1

Description

  The present invention relates to a bark protection tape used to protect trees from damage caused by the deforestation of wild animals such as deer and bears against trees planted in mountain forests and the like.

  In recent years, there has been an increase in damage caused by wild animals that peel off bark from trees grown by reforestation. If trees are peeled off, they will die without being regenerated, and serious damage will occur. Therefore, it is necessary to take protective measures against wild animals.

  As protection measures for trees, methods such as killing wild animals, spraying repellents, wrapping wire nets and rough ropes have been proposed, but wild animal killing is not preferable from the viewpoint of protecting wild animals. As for repellent spraying, it flows due to rain, etc., and long-term effects cannot be expected. In addition, winding a wire mesh is costly and it is not realistic to install it over a wide range. Although winding a rough rope or the like is low in cost, it will be cut when the trunk grows thick due to the growth of the tree, and it will be necessary to wind it again in about three years.

  In order to cope with such problems of the conventional method, a method of winding a protective net has been proposed. In Patent Document 1, a plurality of chain stitches knitted in the warp direction by yarns made of biodegradable synthetic resin material are arranged at predetermined intervals, and tape-like connecting yarns made of biodegradable synthetic resin material are arranged adjacent to each other. A bark protection sheet material integrally formed by interlacing the chain stitches in a state where the knitted bodies knitted in a mesh shape are alternately overlapped with each other in the weft direction with an interval between the knitting rows. Have been described.

  In addition, although such a protective net has a high protective effect, it has a problem in terms of cost and time required for installation work. Therefore, a method for winding a protective tape around a tree has been proposed. For example, Non-Patent Document 1 reports that a protective effect substantially equivalent to that of a protective net can be obtained by winding a film-like tape around a tree. Further, Patent Document 2 describes that a flexible and long tape-like member is spirally wound around a tree.

JP 2011-188828 A JP 2012-19716 A

Tomoya Kitamura, “About Bear Stripping Prevention Measures in Water Resources Forest Development Project”, 2011 Kanto Forest Management Bureau Business and Forestry Technology Presentation, July 2011

  The protective sheet material described in Patent Document 1 can maintain a protective effect over a long period of time and is used as an excellent protective material, but as described above, there are problems in terms of cost and installation work. have. When the protective tape is used, the attachment work can be performed by one person, and the cost can be kept lower than that of the protective sheet material. However, as shown in Non-Patent Document 1 and Patent Document 2, when a film-like tape is wound around a tree and attached, the tape may fall off or tear. For example, in the case of winding in a spiral shape, if the entire tape is not caught on the bark of a tree, the tape cannot slip and maintain the wound state. It is conceivable to wrap the tape strongly so that it does not slide down, but when it grows thick with the growth of the tree, the tape with low elasticity may squeeze into the tree and hinder the growth. Further, when the bark is stuck in the tape even when the tape is caught, the tape may be torn from the stuck portion.

  Accordingly, an object of the present invention is to provide a bark protection tape that can maintain a state of being wound around a tree for a long period of time and can be easily attached.

  The bark protection tape according to the present invention has a plurality of chain stitches knitted in the warp direction by yarns made of a biodegradable synthetic resin material, arranged at predetermined intervals, and connected with a connecting yarn made of a biodegradable synthetic resin material. In a state where the tape-like knitted bodies laid in a mesh shape are alternately stretched in the weft direction with an interval between the chain knitting rows, the chain knitting rows are mutually spaced at a predetermined interval in the warp direction. It is integrally formed by being partially entangled. Further, the tensile elongation at break in the weft direction is 130% to 150%.

  The present invention relates to a tape-shaped knitted body in which chain knitting rows are arranged at predetermined intervals in the warp direction, and adjacent chain knitting rows are alternately connected in the weft direction at predetermined intervals with connecting yarns so as to be knitted into a mesh shape. Since the chain stitches are partially entangled with a predetermined interval in the warp direction in a state where the chain stitches are overlapped, the knitted body is shifted in the weft direction at the portion where the chain stitch rows are not entangled, so that the tape It is possible to expand and contract in the warp direction which is the longitudinal direction. In addition, when the knitted bodies are shifted from each other in the weft direction, the knitted bodies are easily caught on the surface of the tree, and the bark protection tape can be attached in a state of being closely attached to the periphery of the tree. It becomes possible to extend in the longitudinal direction of the tape corresponding to the diameter.

  In addition, since the knitted bodies are double stacked and the chain stitch rows are partially entangled, they have sufficient strength and have durability that does not break for a long time even when wrapped around a tree. doing. And it becomes a tape with thickness by overlapping twice, and there exists a high protective effect.

  Further, since the tape is made of a biodegradable material, the tape is finally decomposed and taken into the soil, and does not adversely affect the natural environment.

It is a top view regarding the bark protection tape which concerns on this invention. It is a top view regarding a knitted body. It is a schematic diagram which shows the state which pulled the bark protection sheet | seat material in the weft direction. It is a schematic diagram which shows the state which expanded the part which the bark protection tape was not entangled of the knitted body. It is the schematic which shows the state which wound the bark protection tape around the tree. It is the schematic which shows the state to which the tape body was tied.

  Hereinafter, the present invention will be described in detail. FIG. 1 is a plan view of a bark protection tape according to the present invention. The bark protection tape A is configured by double overlapping a tape-shaped knitted body B knitted in a mesh shape, and the knitted body B passes through the chain knitting of each other (the longitudinal direction of the bark protection tape A). Are integrally formed by being partially entangled with a predetermined interval in the direction). FIG. 2 is a plan view relating to the knitted body B. FIG. In the knitted body B, a plurality of chain knitting rows 1 knitted in the warp direction are arranged at predetermined intervals, and a connecting yarn knitted at intervals in the chain knitting rows 1 between adjacent chain knitting rows 1. 2 are alternately laid in the weft direction (the width direction of the bark protection tape A) so as to be knitted in a mesh shape.

  The yarn for knitting the chain 1 is preferably made of a biodegradable synthetic resin material. For example, polylactic acid, polybutylene succinate, polybutylene succinate adipate, polycaprolactone, polybutylene terephthalate adipate, polybutylene terephthalate succinate Such aliphatic polyesters and araliphatic polyesters. In addition to the hydrolyzable biodegradable synthetic resin material, an oxidized biodegradable synthetic resin material may be used. A yarn in the form of a monofilament, a multifilament, a flat yarn, or a slit yarn can be used.

  The connecting yarn 2 is preferably made of a biodegradable synthetic resin material, for example, aliphatic groups such as polylactic acid, polybutylene succinate, polybutylene succinate adipate, polycaprolactone, polybutylene terephthalate adipate, polybutylene terephthalate succinate. Polyester or araliphatic polyester may be mentioned. In addition to the hydrolyzable biodegradable synthetic resin material, an oxidized biodegradable synthetic resin material may be used. In particular, a polybutylene succinate resin material (not shown for violation of public order and morals) and a polyolefin resin material containing an oxidation accelerator (not shown for violation of public order and morals) are preferable.

  The connecting yarn 2 is preferably in the form of a narrow tape like a flat yarn. The biodegradable synthetic resin material described above is formed in a tape shape, so that the tensile strength in the yarn length direction is large, but the tear strength is reduced in the direction perpendicular to the yarn length direction, and the connecting yarn 2 is also in the yarn length direction. It is easily torn in the width direction perpendicular to the surface, and is in a state of fluttering.

  The tape-shaped connecting yarn 2 is knitted without being twisted in advance, and is crushed in the width direction when knitted to form a narrow width, but can be easily torn in the width direction even after knitting. It has become.

  FIG. 3 is a schematic diagram showing a state in which the bark protection tape A is pulled in the weft direction. In the bark protection tape A, the chain knitting rows 1 knitted in the warp direction are arranged with a predetermined interval, and the connecting yarns 2 are knitted into the chain knitting row 1 with a predetermined interval, and the wefts between adjacent chain knitting rows 1 are arranged. The mesh is knitted alternately in the direction (FIG. 3A), but when pulled in the weft direction, the connecting yarn 2 is pulled out from the chain knitting row 1 and the chain knitting row 1 contracts in the warp direction. In this state, it becomes a stretched state in the weft direction (FIG. 3B). By knitting in such a mesh shape, the bark protection tape A can have a tensile breaking elongation in the weft direction of 130% to 150%.

  FIG. 4 is a schematic view showing a state in which the bark protection tape A is expanded at a portion where the knitted body B is not entangled. The bark protection tape A includes a chain T of the knitted body B that is partially entangled at a predetermined interval. As shown in FIG. 4A, the knitted body B is entangled and integrated with a portion T1. A portion T2 where the knitted body B is not entangled is formed, and the portion T2 which is not entangled is set by a predetermined length in the longitudinal direction. Therefore, as shown in FIG. 4B, in the portion T2 that is not entangled, the knitted body B can be set in a state shifted in the weft direction. As the knitted body B is displaced in the weft direction, the bark protection tape A expands and contracts in the longitudinal direction.

  Since the knitted body B is formed in a mesh shape, the knitted body B is easily caught on the bark, and the state of being in close contact with the bark is maintained even when the knitted body B is shifted in the weft direction. In addition, when the bark protection tape A is wound around the tree, the bark protection tape A can be expanded and contracted in the circumferential direction of the tree, which is the longitudinal direction of the bark protection tape A, so that the diameter of the tree grows as the tree grows. Thus, the bark protection tape A does not stretch and inhibit the growth of trees. Therefore, the state wound around the tree for a long time can be maintained. And since the whole bark protection tape consists of a biodegradable material, it decomposes | disassembles finally and is taken in into soil and it becomes unnecessary to perform a maintenance work.

  FIG. 5 is a schematic view showing a state in which the bark protection tape A is wound around the tree. In this example, four tape bodies 3 cut at a predetermined length are wound around a tree and tied together, and are wound in four steps at intervals. As described in Non-Patent Document 1, a sufficient protective effect can be achieved by attaching the tape body 3 to a tree in a four-stage winding.

  The tape body 3 is cut longer than the circumference of the tree at the place to be wound, and as shown in FIG. 6, both end portions 30 and 31 are tied with a trap. If tied with a snare, one end 30 can be displaced without loosening the knot, and the wound tape body 3 becomes larger in diameter as the tree grows. Therefore, if sufficient growth is achieved with both ends 30 and 31 wound in consideration of tree growth, the tape body 3 can be maintained in a wound state without hindering tree growth. Moreover, since the tape body 3 is formed of a mesh-shaped knitted body as described above, the tape body 3 is easily caught by the protrusions and scoops on the surface of the tree, and can be prevented from slipping off in the wound state. . Further, in the part where the chain stitch row of the knitted body is not partially entangled, the knitted body is shifted in the weft direction and caught on the surface of the tree, and the tape body 3 is stretched and wound in the longitudinal direction. The wound state can be maintained without being tightened.

  When mounting using the bark protection tape A, if the bark protection tape A is rolled and held on the operator's waist, the length required for mounting on the tree It is only necessary to pull it out and cut it, wrap it around a tree and tie it, and it can be easily attached by one worker. For this reason, it is possible to perform the mounting work efficiently even in a work environment such as a steep slope in a forest.

  In the above-described example, the bark protection tape A is attached by four-stage winding, but the attachment method is not limited to this, and for example, the bark protection tape A can be spirally wound around the tree.

A ... Bark protection tape, B ... Knitted body, 1 ... Chain knitting, 2 ... Connecting yarn, 3 ... Tape body

  The connecting yarn 2 is preferably made of a biodegradable synthetic resin material, for example, aliphatic groups such as polylactic acid, polybutylene succinate, polybutylene succinate adipate, polycaprolactone, polybutylene terephthalate adipate, polybutylene terephthalate succinate. Polyester or araliphatic polyester may be mentioned. In addition to the hydrolyzable biodegradable synthetic resin material, an oxidized biodegradable synthetic resin material may be used. In particular, a polybutylene succinate resin material and a polyolefin resin material containing an oxidation accelerator are preferred.

Claims (2)

  A plurality of chain stitches knitted in the warp direction by yarns made of biodegradable synthetic resin material are arranged at predetermined intervals, and connecting yarns made of biodegradable synthetic resin material are spaced between adjacent chain stitch rows A tape-like knitted body knitted in a mesh shape that is alternately stretched in the weft direction is formed in an integral manner by partially interlacing each other with a predetermined interval in the warp direction in a state where the knitted fabric is double-layered. Bark protection tape, characterized by   2. The bark protective tape according to claim 1, wherein the tensile breaking elongation in the weft direction is 130% to 150%.

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