JP3170474B2 - Graft holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graft holder made of a biodegradable resin for crimping and fixing a joint portion of a rootstock and a scion to activate the rootstock and scion.

[0002]

2. Description of the Related Art Fruit vegetables such as eggplant, tomato, cucumber, watermelon, melon, etc. are grown by grafting their seedlings (spikelets) to other rootstocks. This graft is cut off diagonally at the top of the rootstock, and the bottom of the scion is also cut at an angle similar to the angle at which the rootstock was cut. The bottom end of the scion is joined to make the rootstock and scion alive. Since the rootstock and the scion take a long period of time, in order to maintain the joint between the rootstock and the scion, as described in Japanese Utility Model Application Laid-Open No. 4-113,47, it is formed into a clothespin or cylindrical shape. The joint is crimped by the grafted holder. These graft holders are made of plastic.

[0003]

However, since the plastic does not usually decompose by corrosion, after the grafting (after the joining portion is activated), the unnecessary grafting holders are removed from the grafting one by one, or There is a problem that it is necessary to pick up the objects that have fallen from the graft one by one. Since the number of grafts is very large, the operation of collecting the graft holder has been a very time-consuming task.

The present invention has been made to solve the above-mentioned problems, and has as its object to provide a graft graft holder that does not require collection after grafting.

[0005]

Means for Solving the Problems To achieve this object, a graft graft holder according to claim 1 is for supporting a graft, and has a cylindrical shape having a vertically continuous crack and an open top and bottom. A first support and a second cylindrical member which is connected to the first support, has an inner diameter different from that of the first support, and has a vertically continuous crack and an open top and bottom;
A support, a pair of gripping members protruding from outer peripheral walls of the first and second supports, and a connecting member for connecting the pair of gripping members; The holding member and the connecting member are formed of a biodegradable resin.

[0006] According to the grafting holder of the first aspect, the grafting can be either the first support or the second support depending on the thickness.
Inserted into any of the supports. When the graft is inserted into the first support, the gripping member is pinched, and the graft holder is pressed from the lower end of the first support to the upper end of the stock. Next, the lower end of the scion is inserted into the first support, and the lower end of the scion and the upper end of the stock are joined. Furthermore, the support | pillar which supports a graft is inserted in the space enclosed by the support body, a pair of holding members, and a connection member, and the support of a graft is completed. The joint between the rootstock and the scion is fixed by crimping by the grafting holder, so that after a predetermined period of time, the rootstock and the scion are activated. When the graft grows after taking root,
Although the grafting holder falls off naturally, it is formed into a harmless substance in the soil because it is formed of a biodegradable resin.

According to a second aspect of the present invention, there is provided the grafting holder according to the first aspect, wherein the gripping member is on the same side as a crack formed in the first and second supports and is provided with the two supporting members. The lower end of the inner peripheral wall of each of the first and second supports has a tapered surface whose inner diameter increases downward.

According to a third aspect of the present invention, there is provided the graft holder according to the first or second aspect, wherein the first support has an inner diameter larger than an inner diameter of the second support and has a longer length. Is formed longer than the length of the second support.

[0009]

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 (a)
FIG. 1 is a plan view of a graft holder according to one embodiment of the present invention, and FIG. 1B is a left side view in FIG. 1A.

As shown in FIGS. 1A and 1B, the grafting holder 1 includes a first support 2 and a second support 3 each having a cylindrical shape whose top and bottom are open. A few are
The upper ends are flush with each other and are arranged in parallel. The two supports 2 and 3 are members for accommodating the joints of the scion 8 and the stock 7 therein and supporting the graft. The inner diameter Q of the first support 2 is formed larger than the inner diameter R of the second support 3 (Q> R), and the first support 2 having a larger inner diameter Q is larger than the second support 3 having a smaller inner diameter R. Long (L>
M). Therefore, the thick graft can be grafted by the first support 2 and the thin graft can be grafted by the second support 3, so that the graft holder 1 can be widely used for various grafts having various thicknesses. it can.

Inner peripheral walls 2b, 3 at the lower ends of both supports 2, 3
B has trumpet-shaped tapered surfaces 2d and 3d whose inner diameters are increased downward. By the tapered surfaces 2d and 3d, the upper end of the stock can be easily inserted into each of the supports 2 and 3. Further, at positions facing the joints (continuously provided portions) of the supports 2 and 3, cracks 2 c and 3 c extending from the outer peripheral walls 2 a and 3 a to the inner peripheral walls 2 b and 3 b are provided. (See FIG. 1 (b)). The splits 2c and 3c expand and contract in accordance with the thickness of the grafts inserted into the supports 2 and 3, respectively.
A graft having a diameter larger than the inner diameters Q and R can be inserted into the inside. Each of the fractures 2c and 3d is shown in FIG.
Instead of being formed in a straight line as shown in (b), it may be formed in, for example, a spiral shape or a zigzag shape.

As shown in FIG. 1A, both splits 2c,
3c is arranged linearly in plan view. As shown in FIG. 1 (b), on one side which is partitioned by the splits 2c and 3c arranged in a straight line, and at the upper end where the two support members 2 and 3 are provided flush with each other, as shown in FIG. As shown in FIG. 1A, a pair of gripping members 4, 4, which are orthogonal to the supports 2, 3 and extend in a “C” shape, are provided one by one from each of the supports 2, 3. Have been. This pair of gripping members 4,
Numerals 4 are connected by a connecting member 5 bent in the shape of a letter "C" to give shape resilience. That is, when the pair of gripping members 4 and 4 are pinched in a direction approaching each other and then separated, the pair of gripping members 4 and 4 are immediately restored to the original shape by the connecting member 5. The connecting member 5, the pair of gripping members 4, 4 and the two supports 2, 3 form an enclosed column insertion port 6. The support 9 (splint) is inserted into the support insertion opening 6 to support the graft. In addition, the connecting member 5 may be formed to protrude downward in FIG.

The graft holder 1 constructed as described above
Is integrally formed from a biodegradable resin (biodegradable plastic) of a copolymer of caprolactone and lactide. A biodegradable resin is a resin that, when disposed of in soil or in the sea or river, is decomposed into harmless substances in a relatively short period of time by microorganisms present therein. The biodegradable resin used for the graft holder 1 is softness (softness) that does not hinder the growth of the graft, rubber-like elasticity that can cope with grafts of various thicknesses, and the size of the scion 8 during grafting work. It is preferable to have transparency so that the joint between the base material and the stock 7 can be confirmed from the outside. In addition, since it takes about one week for the joining part to take root, it is necessary that the joint does not soften or collapse under an environment of a temperature of 30 to 35 ° C. and a humidity of 90 to 95% for 7 to 10 days.
Therefore, the graft graft holder 1 of this embodiment employs a copolymer of caprolactone and lactide as a biodegradable resin satisfying such conditions. In particular, a copolymer obtained by mixing a considerable amount of a plasticizer with a copolymer composed of 57-74% of caprolactone and 43-26% of lactide to improve the elasticity as necessary is used.

Here, the dimensions of the grafting holder 1 in the present embodiment are shown below as an example. The length of the first support 2 of the graft holder 1 is approximately 15 mm, and its outer diameter is approximately 4.8.
mm, the inner diameter Q is approximately 2.3 mm, and the width of the split 2c is approximately 0.3 mm.
8 mm. On the other hand, the length of the second support 3 is approximately 10 m.
m, its outer diameter is about 4.2 mm, its inner diameter R is about 1.7 mm,
The width of the split 2c is approximately 0.8 mm. Both supports 2, 3
Have a thickness of approximately 2.5 mm. The length of the pair of gripping members 4 and 4 is approximately 12 mm, the thickness in the horizontal direction is approximately 1.5 mm, and the thickness in the vertical direction is approximately 2.
0 mm. Further, the thickness of the connecting member 5 in the horizontal direction is approximately 1.0 mm, and the thickness in the vertical direction is approximately 2.0 mm, similarly to the gripping member 4.

Next, referring to FIG.
How to use will be described. FIG. 2 is a perspective view of a state in which the scion 8 and the stock 7 are grafted by the graft holder 1. In this description, a case where the thick scion 8 and the rootstock 7 are grafted, that is, a case where the first support 2 is used for grafting will be described.

First, the holding members 4 and 4 of the graft holder 1
And the lower end of the first support 2 is pressed into the upper end 7a of the stock 7 from which the upper part has been cut obliquely. That is, the stock 7 is inserted into the first support 2. The inner peripheral wall 2b at the lower end of the first support 2 is formed with a trumpet-shaped tapered surface 2d whose inner diameter increases downward, so that the insertion of the stock 7 simply requires the grafting holder 1 to be moved downward. It can be easily performed simply by pressing. In addition, when the thickness of the inserted rootstock 7 is larger than the inner diameter Q of the first support 2, the crack 2 c spreads accordingly, and the insertion of the rootstock 7 is assisted.

After inserting the stock 7, the pair of gripping members 4, 4 are gripped in a direction approaching each other, the opening at the upper end of the first support 2 is greatly widened, and the lower portion is cut off diagonally to remove the scion. 8
Is inserted from the upper end into the expanded first support 2 as shown by an arrow A in FIG. Also in this case, if the thickness of the inserted scion 8 is larger than the inner diameter Q of the first support 2,
To that extent, the crack 2c spreads, and the insertion of the scion 8 is assisted.

After inserting the scions 8, the gripping members 4,
When the connecting member 5 is released, the pair of gripping members 4 and 4 and the spread cracks 2 c and 3 c are immediately returned to the original shape by the restoring action of the connecting member 5. The scion 8 is fixed by crimping. Since the grafting holder 1 is made of a transparent biodegradable resin of a copolymer of caprolactone and lactide, the cut surface 8 of the scion 8
It is possible to insert the scion 8 while confirming that a is joined to the cut surface 7a of the stock 7.

After the insertion of the scion 8, a support 9 (splint) for supporting the graft is inserted into the support insertion opening 6. The tip of the support 9 is inserted into the soil 10 to firmly support the graft. Since the support post insertion port 6 is formed large, it can be used widely from a thin support 9 to a wide support 9. Thus, the grafting operation is completed. When grafting a thin rootstock 7 or a scion 8, the same grafting operation as described above is performed using the second support 3 having a small inner diameter R.

The scion 8 inserted into the first support 2 is fixed by crimping by the first support 2 with its cut surface 8a joined to the cut surface 7a of the stock 7. After about one week has passed in this state, the scion 8 and the stock 7 are activated to each other. In addition, the rootstock 7 by wind and vibration before it takes root
Even if the wood or scion 8 is shaken, the graft is supported by the columns 9 and the joint between the stock 7 and the scion 8 is the first support 2.
Since it is sandwiched between the two, such survival is not hindered. The grafting holder 1 is made of a soft biodegradable resin having the rubber-like elasticity of a copolymer of caprolactone and lactide. In addition, the biodegradable resin is used to improve the elasticity. Since a considerable amount of a plasticizer is mixed in as necessary, the growth of the graft after rooting is not hindered.

When the cut surfaces 7a and 8a of the rootstock 7 and the scion 8 are activated and the graft grows and becomes thick, the fracture 2c of the first support 2 is gradually and greatly expanded. When the graft further grows and becomes thicker, the graft graft holder 1 falls off the graft and falls naturally onto the soil 10. The dropped graft holder 1 is decomposed by microorganisms in the soil and decomposed into carbon dioxide and water.

As described above, according to the grafting holder 1 of the present embodiment, the entire grafting holder 1 is formed of a biodegradable resin of a copolymer of caprolactone and lactide. The grafted holder 1 is decomposed into harmless carbon dioxide and water in the soil. Therefore, it is not necessary to collect the used graft holder 1 after use. Moreover, 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 alone may be insufficient. However, since a considerable amount of a plasticizer is mixed in as needed to improve the elasticity, it is possible to compensate for the lack of elasticity of the supports 2 and 3. Further, according to the grafting holder 1 of the present embodiment, the grafting operation can be easily performed with one hand.

In the graft, the scion 8 and the stock 7 are cut obliquely and joined to each other, so that in the case of a thick graft, the joining surface between the scion 8 and the stock 7 becomes long. Therefore, by forming the long first support 2 having a large inner diameter Q used for a thick graft like the graft holder 1 of the present embodiment (L), the joint surface can be reliably formed by the first support 2. It can be covered. On the other hand, in the case of a thin graft, the scion 8 and the stock 7 often break when inserted into the graft holder 1. Therefore, like the grafting holder 1 of the present embodiment, the second support 3 having a small inner diameter R used for a thin grafting is formed short (M), so that the scion 8 or the rootstock 7 can be attached to the grafting holder 1. Since the insertion length can be shortened, it is possible to suppress breakage of these at the time of insertion.

If the workability of the graft is deteriorated because the lengths of the first and second supports 2 and 3 are different (L> M), the two supports 2 and 3 are formed to have the same length. The upper and lower ends of the supports 2 and 3 may be flush with each other. With this configuration, the insertion positions of the scion 8 and the stock 7 with respect to the two supports 2 and 3 become equal, and the workability of the graft can be improved.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the gist of the present invention. Can easily be inferred.

The grafting holder 1 of this embodiment was formed from a biodegradable resin of a copolymer of caprolactone and lactide. However, it is also possible to form the graft holder 1 from a modified starch or a lactic acid-based biodegradable resin. Since the lactic acid-based biodegradable resin has high transparency,
It is possible to see through the joint between the spike 8 and the scion 8 from the outside, and to perform the grafting work accurately, and since carbon dioxide gas is passed through lactic acid during the decomposition process, lactic acid can be used as soil nutrient. is there.

Each of the supports 2 and 3 is only required to be cylindrical, and does not necessarily have to be cylindrical. Therefore, these may be formed in a polygonal cylindrical body. Further, in the present embodiment, the stock 7 is inserted from the tapered surfaces 2d and 3d, and the scion 8 is inserted from the gripping members 4 and 4. However, the procedure may be reversed, and the scion 8 may be inserted from the tapered surfaces 2d and 3d, and the stock 7 may be inserted from the gripping members 4 and 4. However, since the insertion of the stock 7 is below the graft holder 1 and the appearance of the insertion is difficult to see, the tapered surfaces 2d and 3 are used as in the above embodiment.
Inserting the stock 7 from the d side makes it easier to insert it.

[0028]

According to the graft graft holder of the present invention, the graft graft holder which has been naturally dropped after the grafting is activated is decomposed into harmless substances in the soil. Therefore, there is an effect that it is not necessary to collect the used graft holders one by one. Further, since the graft holder is provided with the first support and the second support having different thicknesses, there is an effect that it can be widely used for various grafts having different thicknesses. Further, since the pair of gripping members projecting from the outer peripheral walls of the first support and the second support are connected by the connecting member, the support (for supporting the graft) is inserted into the space surrounded by the pair of gripping members. Splint) can be inserted.

According to the grafting holder of the second aspect,
In addition to the effects of the graft holder according to claim 1, the lower ends of the inner peripheral walls of the first and second support members are tapered surfaces whose inner diameters expand downward, respectively. There is an effect that the push-fit can be easily performed on the upper end of the slab. Moreover, since the pair of gripping members are on the same side as the crack formed in each support and are protruded at the upper position of the outer peripheral wall of each support, the pair of gripping members are By pinching in the approaching direction, the cracks in each support are widened, and the scion can be easily inserted into each support. The grafting holder may be used upside down. That is, the rootstock may be inserted into a support body that is spread by pinching the pair of gripping members in a direction approaching each other, and then the scion may be inserted along the tapered surface.

According to the grafting holder of the third aspect,
In addition to the effect of the graft holder according to claim 1 or 2, the first support used for a large graft having a large inner diameter is formed longer, while the first support used for a narrow graft having a smaller inner diameter than the first support is used. The second support is formed short. If the rootstock or scion to be grafted is thick,
The cutting surface of the stock and scion becomes longer and the joint becomes longer. If the graft holder is short, the long joint cannot be completely covered. However, since the first support having a large inner diameter is formed long, the first support is used to completely cover the joint. There is an effect that it can be grafted. On the other hand, when the rootstock or scion to be grafted is thin, the rootstock or scion easily breaks during insertion if the insertion portion into the grafting holder is long. However, since the second support having a small inner diameter is formed to be short, by using this second support, the insertion length into the graft holder can be shortened.
There is an effect that grafting can be performed without breaking rootstocks and scions.

[Brief description of the drawings]

FIG. 1A is a plan view of a graft holder according to an embodiment of the present invention, and FIG. 1B is a left side view thereof.

FIG. 2 is a perspective view showing a state in which a rootstock and a scion are grafted by the grafting holder of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Graft holder 2 1st support body 3 2nd support body 2c, 3c Split 2d, 3d Tapered surface 4 Grasping member 5 Connecting member 6 Post insertion port 7 Rootstock 8 Hogi 9 Post (supplement)

Continuation of the front page (56) References JP-A-9-233945 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01G 1/06

Claims (3)

(57) [Claims] 1. A grafting holder for supporting a graft, comprising: a first cylindrical support having a vertically continuous crack and open at the top and bottom; and a first support connected to the first support. A cylindrical second support member having an inner diameter different from that of the first support member and having a vertically continuous crack and having an open top and bottom; and a pair of gripping members projecting from outer peripheral walls of the first and second support members And a connecting member for connecting the pair of holding members, wherein the first and second supports, the holding member, and the connecting member are formed of biodegradable resin. holder. 2. The gripping member is provided on the same side as a crack formed in the first and second supports and at a position above the two supports, and the first and second grippers are provided. 2. The grafting holder according to claim 1, wherein the lower end of the inner peripheral wall of the support is a tapered surface whose inner diameter increases downward. 3. The first support member has an inner diameter equal to the second support member.
3. The grafting holder according to claim 1, wherein the graft is formed to be larger than the inner diameter of the support, and the length thereof is formed to be longer than the length of the second support. 4.