JPH09294465A - Grafting holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grafting holder not requiring recovery after the use. SOLUTION: A top end part of a rootstock 5 from which the upper part is removed by obliquely cutting is inserted into a grafting holder 1 from a bottom hole 2c of a supporter 2. A lower end part of a scion 6 from which the lower part is removed by obliquely cutting is inserted into the grafting holder 1 from a top hole 2b of the supporter 2. The inserted scion 6 is joined and rooted with the rootstock 5 by being pressed and fixed with the supporter 2 in a state that the cut face 6a of the scion 6 is joined to the cut face 5a of the rootstock 5. After the rooting, the grafting grows and becomes thick, an opening of a crack 2a in the grafting holder 1 is widened, then the grafting holder 1 is fallen from the grafting and spontaneously fallen in the earth 7. Since the fallen grafting holder 1 is made of a biodegradable resinof a copolymer of caprolactone and a lactide, it is decomposed to carbon dioxide gas and water by soil microorganisms.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graft holder for crimping and fixing a joint of a rootstock and a scion in order to vitalize the rootstock, and more particularly to a graft holder formed of a biodegradable resin. is there.

[0002]

2. Description of the Related Art Fruit and vegetables such as eggplant, tomato, cucumber, watermelon, and melon are grown by grafting their seedlings (spikes) on rootstocks of other species. For this graft, remove the upper part of the rootstock by cutting it diagonally, and also remove the lower part of the scion at the same angle as the angle at which the rootstock was cut. The roots and stalks are made to attach by joining the lower ends of the stalks. Since it takes a long time for the rootstock and the scion to take root, in order to maintain the bond between the rootstock and the scion during that time, as described in Japanese Utility Model Publication No. 4-113547, it is formed into a clothespin type or a cylindrical shape. The grafted holder is used to crimp the joint. These graft holders are molded from plastic.

[0003]

However, since plastic does not usually decompose in a corrosive manner, after grafting (after rooting of the joint), unnecessary graft holders are removed one by one from the graft, or There was a problem that you had to pick up and collect the objects that fell from the graft. Since the number of grafts is very large, the collection of graft holders was a laborious task.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a graft holder that does not require recovery after grafting.

[0005]

In order to achieve this object, a graft holder according to a first aspect of the present invention is provided with a tubular support body whose upper and lower sides are open, and the support body provided in the vertical direction of the support body. And a pair of side walls vertically provided on the outer peripheral wall of the support at a predetermined interval, and the pair of side walls are pinched in a direction in which they are close to each other. The opening and the inner diameter of the support is increased, and a rootstock or a scion is inserted into the support, and an elastic wall having elasticity is provided between the pair of side walls of the support, The support, the side wall,
The elastic wall and the elastic wall are integrally formed of a biodegradable resin.

In the graft holder according to the first aspect of the present invention, when the pair of side walls are pinched in the direction in which they approach each other, the opening of the crack provided in the support is widened and the inner diameter of the support is increased. In this state, the upper end of the rootstock, which has been cut off at the upper part, is inserted into the support, and the side wall that has been picked is released.
Then, since the support returns to the original shape due to the elastic action of the elastic wall, the opening of the crack is shortened, the inner diameter of the support is reduced, and the upper end of the rootstock is approximately in the lower half of the support. Be accommodated. Next, the lower end of the scion removed by cutting the lower part is inserted into the support and joined to the upper end of the rootstock. The joint is crimped and fixed by a support, and after a predetermined period of time, the scion and the rootstock are alive. After grafting, the graft holder, which is naturally removed, is made of biodegradable resin, so that it is decomposed into a harmless substance in soil.

A graft holder according to a second aspect of the present invention is the graft holder according to the first aspect, wherein the protruding length of each of the side walls from the support is approximately one half or less of the length of the support, and the elastic wall. Is formed in a V shape or a W shape, and the inner diameter of the upper end of the support is larger than the inner diameter of the substantially central portion thereof.

A graft holder according to a third aspect of the present invention comprises a support body for supporting the graft and a support for supporting the graft,
The support is a first through hole that penetrates the support in the vertical direction.
A through-hole, a first split provided in the up-down direction of the support that reaches the inner circumference of the first through-hole, and a first through-hole penetrating in the up-down direction of the support having a thickness different from that of the first through-hole. It has two through holes and a second split provided in the up and down direction of the support, which reaches the inner circumference of the second through hole, and the support is molded of biodegradable resin.

According to the graft holder of the third aspect of the invention, since the supporting body is provided with the first through hole and the second through hole having different thicknesses, the graft can be attached according to the thickness of the graft. The through hole to be inserted and the through hole to which the support column is inserted can be selected.

According to a fourth aspect of the present invention, the graft holder covers the joint between the upper end of the rootstock and the lower end of the scion and fixes the joint under pressure, and is made of biodegradable resin.

The graft holder according to claim 5 is the graft holder according to any one of claims 1 to 4.
The biodegradable resin is composed of a copolymer of caprolactone and lactide.

[0012]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG.
3 illustrates an example graft holder. 1 (a) is a top view of the graft holder, and FIG. 1 (b) is a top view of FIG.
It is sectional drawing in the II line in (a).

As shown in FIGS. 1 (a) and 1 (b), the graft holder 1 includes a support 2 for accommodating the spikes 6 and the rootstock 5.
And a pair of side walls 3 extending from the support 2 and an elastic wall 4 provided between the pair of side walls 3. The support 2 is formed in a cylindrical shape, the inner diameter of which gradually increases from the lower portion N to the upper portion M, and the inner diameter L of the upper end portion thereof is particularly large. That is, the support 2
The inner shape of the upper end portion 2b is formed into a trumpet shape that opens upward. Therefore, after inserting the rootstock 5 into the graft holder 1, the spikes 6 can be easily inserted from above.

On one side of the support 2, a crack 2 reaching the inner circumference is formed.
a is formed, and an elastic wall 4 is formed on the support 2 at a position facing the crevice 2a. The elastic wall 4 is for giving elasticity to the support body 2, and is formed in a W shape in a top view. On both sides of the elastic wall 4, a pair of side walls 3 radially extending from the support body 2 are provided. Side wall 3
Is formed in a flat plate shape, and is arranged in the vertical direction of the support body 2 from the upper end to the lower end. Further, in order to reduce the weight of the side wall 3, the side wall 3 has a projecting length K from the supporting body 2 that is slightly less than half the height (length) of the supporting body 2. Graft holder 1 attached to the graft
However, it is to prevent the side wall 3 from falling off from the graft by its own weight before the survival.

The support 2, the side wall 3 and the elastic wall 4 are integrally formed of a biodegradable resin (biodegradable plastic) which is a copolymer of caprolactone and lactide. A biodegradable resin is a resin that is decomposed into a harmless substance in a relatively short period of time by a microorganism present therein when it is discarded in the soil or in the sea or river. The biodegradable resin used for graft holders is soft (flexible) that does not inhibit the growth of grafts, has a rubber-like elasticity that can be used for grafts of varying thickness, and removes the joints during grafting work. Those having transparency that can be confirmed from are preferable. In addition, since it takes about one week for the joint to live, it is necessary that it is not softened or disintegrated for one week in an environment of temperature 30 ° C. and humidity 95%. Therefore, in the graft holder 1 of the first embodiment, a copolymer of caprolactone and lactide is adopted as a biodegradable resin satisfying the above conditions. Particularly, a copolymer composed of 57-74% of caprolactone and 43-26% of lactide is suitable for the graft holder.

Here, the dimensions of the graft holder 1 in the first embodiment are shown below as an example. The height (length) of the support 2 is about 15 mm, and the outer diameter of the upper end of the support 2 is about 6 m.
m, the outer diameter of the lower end is approximately 4.2 mm, and the inner diameter L of the upper end is approximately 3.
5 mm, the inner diameter M of the upper part is approximately 2.3 mm, the inner diameter N of the lower end is 2.0 mm, the extension length K of the side wall 3 is approximately 7 mm, the height (length) of the side wall 3 is approximately 15 mm, and the thickness of the side wall 3 is Is about 1.5m
m, and the thickness of the elastic wall 4 is about 0.8 mm.

Next, a method of using the graft holder 1 configured as described above will be described. Graft holder 1
When the side wall 3 is pinched in the direction of the elastic wall 4 side, that is, in the direction of arrow A in FIG. 1A, the opening of the crack 2a facing the elastic wall 4 is widened, and the inner diameter of the support 2 is widened. The upper end of the rootstock 5, which has been removed by obliquely cutting the upper part, is inserted into the graft holder 1 through the prepared hole 2c of the expanded support 2. The rootstock 5 may be inserted from the widened split 2a. When the side wall 3 that has been picked is released after the rootstock 5 is inserted, due to the elasticity of the biodegradable resin of the copolymer of caprolactone and lactide and the elasticity of the elastic wall 4 provided between the side walls 3, Returns to its original shape. As a result, the upper end portion of the rootstock 5 accommodated in the support body 2 is sandwiched by the support body 2. FIG. 2 illustrates this state. The graft holder 1 in FIG.
1 is represented by a cross-sectional view taken along the line I-I in FIG. 1A, as in FIG.

After the upper end of the rootstock 5 is clamped by the support body 2, the scion 6 removed by obliquely cutting the lower part is grafted from the upper hole 2b of the support body 2 in the direction of arrow C in FIG. Holder 1
Insert into. Since the upper hole 2b of the support body 2 is opened like a trumpet, and the inner diameter of the support body 2 is gradually increased from the lower end to the upper end, insertion of the spikes 6 should be easy. You can When the thickness of the inserted spiker 6 is larger than the inner diameter of the support 2, the crack 2
The spread of a helps the insertion of the scion 6. The graft holder 1 is made of a transparent biodegradable resin of a copolymer of caprolactone and lactide, so that the graft 6
It is possible to carry out the grafting work while confirming that the cut surface 6a of 6 is joined to the cut surface 5a of the rootstock 5.

The scion 6 inserted in the graft holder 1
Is crimped and fixed by the support body 2 in a state where the cut surface 6a is joined to the cut surface 5a of the rootstock 5, and about 1
After a lapse of a week, the scion 6 and the rootstock 5 are rooted together.
Even if the rootstock 5 and the scion 6 are shaken by wind or vibration before being lived, the joint portion is sandwiched by the support body 2 to which elasticity is given by the elastic wall 4.
Survival is not hindered. Further, since the graft holder 1 is formed of a soft biodegradable resin having rubbery elasticity of a copolymer of caprolactone and lactide, it does not hinder the graft growth after rooting. .

When the cut surfaces 5a and 6a of the rootstock 5 and the scion 6 are alive and the graft grows and becomes thick, the graft holder 1
The opening of the crack 2a is widened, and eventually the graft holder 1 comes off the graft and falls naturally onto the soil 7. The dropped graft holder 1 is decomposed into microorganisms in the soil by carbon dioxide and water.

As described above, according to the graft holder 1 of the first embodiment, since the entire graft holder 1 is formed of the biodegradable resin of the copolymer of caprolactone and lactide, it is unnecessary after grafting. The grafted holder 1 that has become a material is decomposed into harmless carbon dioxide and water in the soil.
Therefore, the work of collecting the graft holder 1 after use can be eliminated. Although the biodegradable resin of the copolymer of caprolactone and lactide is superior in elasticity to other biodegradable resins, the elasticity of the support 2 may be insufficient by itself. In such a case, the elasticity of the support 2 that is lacking can be compensated by the elastic wall 4 that is disposed so as to face the cut 2a of the support 2. Furthermore, according to the graft holder 1 of this embodiment, grafting can be performed with one hand.

Next, the graft holder of the second embodiment will be described with reference to FIG. FIG. 3A is a top view of the graft holder of the second embodiment, and FIG.
It is sectional drawing in the III-III line in (a).

As shown in FIG. 3 (a), the graft holder 11 according to the second embodiment has two cylindrical tubular bodies 12, 13.
Are joined as a support. The two cylindrical bodies 12 and 13 are provided with cylindrical through holes 12a and 13a penetrating in the vertical direction of the cylindrical bodies, and the inner diameters of the through holes 12a and 13a are different from each other. (Inner diameter 12a> inner diameter 13a). These through holes 12a, 13
A graft of a rootstock and a scion is inserted into one of a, and a support for supporting the graft inserted into one of the through holes is inserted into the other through hole. The through holes 12a and 13a into which the graft and the support are inserted are selected according to the thickness of the graft.

Cracks 12b and 13b are provided at positions facing the joint portion 14 of both tubular bodies 12 and 13 and are provided in the vertical direction to reach the inner circumference of the tubular bodies 12 and 13, respectively. Due to the cracks 12b and 13b, the tubular body 1
2 and 13 are given elasticity. As shown in FIG. 3B, the upper ends 12c and 13c and the lower ends 12d and 13d of the tubular bodies 12 and 13 are formed in a trumpet shape that opens toward the ends. It is designed to allow easy insertion of rootstocks, stalks, and columns. The graft holder 11 of the second embodiment is also integrally formed of biodegradable resin made of a copolymer of caprolactone and lactide, like the graft holder 1 of the first embodiment.

Here, the dimensions of the graft holder 11 in the second embodiment are shown below as an example. The height (length) of the graft holder (support) is approximately 15 mm, the outer diameter of one tubular body 12 is approximately 3.7 mm, and the outer diameter of the other tubular body 13 is approximately 3.5 mm, one tubular Inner diameter Q of the body 12 is approximately 3.4 m
m, the inner diameter R of the other tubular body 13 is approximately 3.0 mm, and the thickness of both tubular bodies 12 and 13 is approximately 1.0 mm.

Next, the graft holder 1 of the second embodiment.
The method of using No. 1 will be described. First, from the lower end 12d of the one tubular body 12 of the graft holder 11, the upper end of the rootstock, which is removed by obliquely cutting the upper part, is inserted. As the tubular body 12 into which the rootstock is inserted, an appropriate tubular body 12 is selected according to the thickness of the rootstock and the scion to be inserted. At this time, the rootstock is easily inserted into the tubular body 12 by the trumpet-shaped opening provided at the lower end 12d and the split 12b. Next, the scion removed by cutting the lower part diagonally is inserted into the tubular body 12 into which the rootstock has been inserted from the upper end 12c thereof. This scion is easily inserted by the trumpet-shaped opening and the crack 12b provided on the upper end 12c.

When the rootstock and the scion are inserted into the graft holder 11, a column for supporting the graft is inserted into the empty tubular body 13 from its upper end 13c. The tip of the inserted pillar is inserted into the soil, and the graft is firmly supported by the pillar. The scion inserted into the graft holder 11 is crimped and fixed by the tubular body 12 in a state where the cut surface is joined to the cut surface of the rootstock, and after about one week, the earstock and the rootstock are separated from each other. It is vital to each other.

When the cut surfaces of the rootstock and the scion are alive and the graft grows and becomes thicker, the crack 12 of the graft holder 11
The opening of a is widened, and eventually, the graft holder 11 comes off the graft and naturally falls on the soil. The dropped graft holder 11 is decomposed by microorganisms in the soil into carbon dioxide and water.

As described above, according to the graft holder 11 of the second embodiment, two tubular bodies 12, 13 into which the graft and the support are inserted are provided, and the graft is inserted according to the thickness of the graft. Since you can select the tubular body to do,
Even if the grafts have different thicknesses, the grafts can be properly grafted. That is, one type of graft holder 11 can handle grafts of various thicknesses.

The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. Is easily guessed.

The graft holders 1 and 11 of this example were molded from a biodegradable resin of a copolymer of caprolactone and lactide. However, this graft holder 1,11
Can also be molded from a starch-modified product or a lactic acid-based biodegradable resin. Since the lactic acid-based biodegradable resin has high transparency, the joint between the rootstock and the scion can be seen from the outside, and the grafting work can be performed accurately. Therefore, lactic acid can be used as a soil nutrient.

In the first embodiment, the elastic wall 4 is formed in a W shape in a top view. However, the shape is not limited to this as long as the shape has elasticity. For example, it may be formed in a V shape in a top view, or may be formed in another shape having elasticity. In addition, the support 2 of the side wall 3
The protrusion length K from can be made shorter as long as the side wall 3 can be pinched.

Further, the support 2 of the first embodiment and the second
The cylindrical bodies 12 and 13 of the embodiment may be cylindrical, and do not necessarily have to be cylindrical. Therefore, the support body 2 and the tubular bodies 12 and 13 may be configured by polygonal tubular bodies.

[0034]

EFFECT OF THE INVENTION According to the graft holder of claim 1, after graft grafting, the graft holder that is naturally removed is decomposed into a harmless substance in the soil. This has the effect of eliminating the need for collection work for collecting the two. Further, since the support is provided with the elastic wall, the support can be provided with sufficient elasticity although it is made of biodegradable resin. Therefore, there is an effect that the scion and the rootstock can be easily inserted into the support, and the scion and the rootstock accommodated in the support can be fixed by pressure.

According to the graft holder of claim 2,
In addition to the effect of the graft holder according to claim 1, the projecting length of each side wall from the support is less than or equal to about one half of the support length. Before grafting, it is possible to prevent the graft holder from falling off from the graft due to the weight of the side wall. Further, since the elastic wall is formed in a V shape or a W shape, there is an effect that elasticity can be imparted to the support body formed of the biodegradable resin without changing the material of the elastic wall. Further, since the inner diameter of the upper end of the support is formed to be larger than the inner diameter of its substantially central portion, it is possible to easily insert the scion into the support from above the support after accommodating the rootstock in the support. The effect is that you can do it.

According to the graft holder of claim 3,
After the grafting has been established, the grafting holders naturally removed are decomposed into harmless substances in the soil, so that there is an effect that the collecting work for collecting the grafting holders after use one by one is unnecessary. In addition, the support is provided with the first through hole and the second through hole having different thicknesses, and since the through hole to be inserted can be selected according to the thickness of the graft, the thickness of the graft can be selected. Even in different cases, it is possible to properly graft.

According to the graft holder of claim 4,
After graft grafting, the graft holders that have been naturally removed are decomposed into harmless substances in the soil, so there is an effect that it is not necessary to collect each graft holder after use. .

According to the graft holder of claim 5,
In addition to the effect of the graft holder according to any one of claims 1 to 4, since the graft holder is made of a biodegradable resin composed of a copolymer of caprolactone and lactide, the graft holder is transparent. It is soft and has elasticity. Therefore, since it is transparent, the state of the joint can be seen from the outside during the grafting work, and the grafting work can be performed accurately.
Further, since it is soft, it has an effect of not inhibiting the growth of the grafted graft. Further, since it has elasticity, it is possible to appropriately graft even when the thickness of the graft is different.

[Brief description of drawings]

1A is a top view of a graft holder according to the first embodiment of the present invention, and FIG. 1B is a view of I in FIG. 1A.
It is sectional drawing in the -I line.

FIG. 2 is a view showing a state where the graft holder is attached to the rootstock.

3A is a top view of a graft holder that is a second embodiment of the present invention, and FIG. 3B is a view of II in FIG. 3A.
It is a sectional view taken along the line I-III.

[Explanation of symbols]

1 Graft holder 2 Support 2a Split 3 Side wall 4 Elastic wall 5 Rootstock 6 Scion 11 Graft holder (support) 12,13 Cylindrical body 12a, 13a Through hole (first through hole, second through hole) 12b, 13b fissure (first fissure, second fissure)

Claims (5)

[Claims] 1. A tubular support body whose top and bottom are open, a crack provided in the top-bottom direction of the support body and reaching the inner circumference of the support body, and an outer peripheral wall of the support body with a predetermined space therebetween. And a pair of side walls provided in the up-down direction, and by pinching the pair of side walls in a direction in which they approach each other, the opening of the crack and the inner diameter of the support body are increased, and the root body is inserted into the support body. Alternatively, in the graft holder into which the scion is inserted, an elastic wall having elasticity is provided between the pair of side walls of the support, and the support, the side wall, and the elastic wall are integrated by a biodegradable resin. Graft holder characterized by being molded into. 2. The protruding length of each of the side walls from the support is less than or equal to about ½ of the support length, the elastic wall is formed in a V shape or a W shape, and the upper end of the support is formed. The graft holder according to claim 1, wherein the inner diameter is larger than the inner diameter of the substantially central portion. 3. A graft holder comprising a support for supporting a graft and a column for supporting the graft, wherein the support is a first penetrating member in a vertical direction of the support.
A through-hole, a first split provided in the up-down direction of the support that reaches the inner circumference of the first through-hole, and a first through-hole penetrating in the up-down direction of the support having a different thickness from the first through-hole. Two through holes and a second split provided in the up and down direction of the support to reach the inner circumference of the second through hole are provided, and the support is formed of a biodegradable resin. Graft holder to be. 4. A graft holder, which is formed of a biodegradable resin that covers a joint between an upper end of a rootstock and a lower end of a scion and press-bonds the joint. 5. The graft holder according to any one of claims 1 to 4, wherein the biodegradable resin is composed of a copolymer of caprolactone and lactide.