JP2016021928A - Tube for grafting, and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide means for preventing a grafted seedling, in which a rootstock and a scion contact in an approximately coaxial state, from being damaged by free ends of a tube for grafting when externally fitting a C-shaped tube for grafting to a rootstock/scion contact part of the grafted seedling.SOLUTION: In a tube for grafting 12, each surface of two tube free end parts 13, 14, which opposes to each other with a tube gap laid in-between, is a flat surface which is parallel in a center axis direction of the tube for grafting and inclined with respect to a direction in which a diameter of the tube for grafting 12 extends within an annular wall. The tube for grafting 12 is produced by cutting off a cylindrical tube 10, which consists of an elastic material and has a uniform wall thickness of the annular wall, across both end surfaces of the cylindrical tube 10 at a predetermined planar cut-off surface by using a planar tube cutter 11, and forming a tube gap and the two tube free end parts 13, 14.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a grafting tube that is externally fitted to a rootstock / hogi contact portion of a grafted seedling, and a method for producing the grafting tube.

  In recent years, grafted seedlings obtained by grafting rootstock and hogi in a substantially coaxial shape have been widely used for cultivation of plants such as fruits and vegetables. In order to produce such grafted seedlings, it is necessary that the stem stem portion and the stem stem portion are brought into contact with each other in a substantially coaxial manner and then combined with each other. Conventionally, adhesive tape, scissors clips, adhesives, sticks, or the like have been used as the coupling means for coupling the stem stalk and the stalk stem.

  However, in these conventional coupling means, there is a problem that the coupling strength between the root of the rootstock and the stem of the scion is not sufficient. Therefore, by using a tube (or pipe) as a coupling means, and inserting the stem part of the rootstock and the stem part of the scion into the hollow part of the tube from the opposite ends, respectively, Various grafting techniques have been proposed in which the head part and the stem part of the hogi are combined (see, for example, Patent Documents 1 to 4). However, for example, in the conventional grafting method disclosed in Patent Documents 1 to 4 using a tube as a coupling means, when each stem portion of a rootstock and a scion is inserted into the tube, the insertion fails and the rootstock or There is a problem that damage may occur to Hogi.

  Therefore, for example, as shown in FIGS. 1 and 2 (a) and 2 (b), when grafting seedling 3 by grafting rootstock 1 and hogi 2, it is formed of an elastic material, and is formed in the circumferential direction. A grafting technique has been proposed in which both ends are free ends separated from each other and a grafting tube 4 having a substantially C-shaped cross section is used (see, for example, Patent Document 5). According to this grafting technique, the rootstock 1 and the hogi 2 are brought into contact with each other in a substantially coaxial shape, and the grafting tube 4 having a generally C-shaped cross section (hereinafter simply referred to as “C-shape”) is obtained. It can be elastically deformed by applying an external force so that the gap between both free ends is widened, and can be externally fitted to the rootstock / hogi abutting portion from the side of the rootstock 1 and hogi 2. Accordingly, since it is not necessary to insert the rootstock 1 and the hogi 2 into the tube, there is no problem as in the case of the grafting method described in Patent Documents 1 to 4, for example.

JP-A-5-30856 JP-A-9-107795 Japanese Patent Laid-Open No. 9-121677 JP-A-11-168974 JP 2007-124936 A

  For example, as shown in FIGS. 3 (a) to 3 (c), when a C-shaped grafting tube 4 made of an elastic material is used for grafting the rootstock 1 and the hogi 2, a tube mounting head 5 is used. The grafting tube 4 is externally fitted to the rootstock / hogi contact portion of the grafted seedling 3 (see FIG. 2A). Specifically, first, as shown in FIG. 3A, the tips of a pair of tube fingers 6 and 7 are inserted into the tube gap between the free ends 8 and 9 of the C-shaped grafting tube 4.

  Next, as shown in FIG. 3 (b), both tube fingers 6 and 7 are opened moderately. Thereby, both the tube fingers 6 and 7 widen the space | interval of a tube gap, and expand the tube 4 for grafting by elastic deformation. In this state, the tube mounting head 5 moves toward the rootstock 1 and the hogi 2 that are in contact with each other substantially coaxially. As a result, as shown in FIG. 3B, the rootstock / hogi abutting portion is located inside the C-shaped grafting tube 4.

  And as shown in FIG.3 (c), both the tube fingers 6 and 7 are opened further largely. As a result, the free ends 8 and 9 of the grafting tube 4 are disengaged from the tube fingers 6 and 7. As a result, the grafting tube 4 is restored to its original shape by its elastic force, the grafting tube 4 is externally fitted to the rootstock / hogi abutting portion, and the rootstock 1 and the hogi 2 are used for grafting. They are coupled (joined) to each other via the tube 4.

  By the way, for example, when the C-shaped grafting tube 4 is externally fitted to the rootstock / hogi abutting portion according to the procedure shown in FIGS. 3A to 3C, The relative position with the grafting tube 4 may be slightly shifted. When the position shifts in this way, when the grafting tube 4 is restored to its original shape by its elastic force, the free ends 8 and 9 of the grafting tube 4 are placed around the rootstock / hogi contact portion. There is a problem that the rootstock 1 or the hogi 2 (or the rootstock / hogi abutting portion) may be damaged by colliding with the surface or rubbing the peripheral surface of the rootstock / hogi abutting portion. In addition, the grafted seedling 3 in which such damage has occurred is apt to become ill and must be discarded.

  The present invention has been made in order to solve the above-described conventional problems, and a C-shaped is formed on the rootstock / hogi abutting portion of the grafted seedling in which the rootstock and the hogi abut against each other substantially coaxially. The problem to be solved is to provide means for preventing damage to rootstocks or spikelets or grafted seedlings by the free end of the grafting tube when the grafting tube is fitted externally. To do.

  According to the present invention made to solve the above problems, a grafting tube fitted (or attached) to a rootstock / hogi contact portion of a grafted seedling is an annular wall of a cylindrical tube made of an elastic material ( A tube gap extending in the longitudinal direction of the cylindrical tube (in the direction of the central axis of the cylindrical tube) is formed on the peripheral wall and the tube wall. That is, the cross section of the grafting tube (cross section perpendicular to the central axis of the cylindrical tube) is substantially C-shaped. In this grafting tube, the thickness of two tube free ends (having a certain length) facing each other across the tube gap gradually decreases toward the tip of the tube free end. .

  In the grafting tube according to the present invention, the surfaces of the two tube free ends facing each other across the tube gap are parallel to the central axis direction of the grafting tube, and the diameter of the grafting tube is an annular wall. It is preferable that the plane is inclined with respect to the direction extending in the inside. This grafting tube uses an annular wall of a cylindrical tube made of an elastic material in a direction parallel to the central axis direction of the cylindrical tube, for example, using a flat cutter, and the diameter of the cylindrical tube extends in the annular wall. Can be produced by cutting on a plane inclined with respect to the tube to form a tube gap and two tube free ends.

  In the grafting tube according to the present invention, each of the outer peripheral sides of the two tube free ends is parallel to the direction of the center axis of the grafting tube and the direction in which the diameter of the grafting tube extends. A vertical plane is also preferred. In this case, the two planes are on the same plane. This grafting tube is formed by cutting the annular wall of a cylindrical tube made of an elastic material in a plane parallel to the central axis direction of the cylindrical tube and perpendicular to the direction in which the diameter of the cylindrical tube extends. And two tube free ends.

A grafting tube in which the wall thickness of two free ends facing each other across the tube gap gradually decreases toward the tip of the free end of the tube can be produced by the following method. Good.
That is, first, on the annular wall of the cylindrical tube made of an elastic material, with respect to the circumferential direction of the cylindrical tube, a minimum thickness portion is set at a predetermined portion, and then the minimum thickness portion on each side of the minimum thickness portion. A thin-walled portion whose thickness gradually decreases toward is formed. Thereafter, the minimum wall thickness portion is cut along a plane parallel to the direction of the central axis of the cylindrical tube and substantially parallel to the direction in which the diameter of the cylindrical tube extends to form a tube gap and two free ends of the tube. To do.

  In the grafting tube according to the present invention, the thickness of the two tube free ends facing each other across the tube gap gradually decreases toward the tip of the tube free end, so that the tube free end The part is very soft and easily deforms or curves. For this reason, for example, when the grafting tube is externally fitted to the rootstock / hogi abutting portion of the grafted seedling by the method shown in FIGS. 3 (a) to 3 (c), the rootstock / hogi abutting portion and When the relative position of the grafting tube is slightly deviated, the free end of the tube collides with the peripheral surface of the rootstock / hogi abutment when the grafting tube returns to its original shape by its elastic force. However, even if the peripheral surface of the rootstock / hogi abutting portion is rubbed, the free end of the tube can be easily deformed or curved, resulting in damage to the rootstock or hogi (or rootstock / hogi abutting portion). Does not occur. Therefore, when the C-shaped grafting tube is externally fitted to the rootstock / hogi abutting portion of the grafted seedling in which the rootstock and hogi abut substantially coaxially, the free end of the grafting tube causes the stand It is possible to effectively prevent damage to trees, hogi or grafted seedlings.

  Further, according to the method for producing a grafting tube according to the present invention, a cylindrical tube made of an elastic material and having a uniform peripheral wall thickness is cut once or twice with a flat cutter, or a tube made of an elastic material. Two tube free ends facing each other across the tube gap are each a simple process of cutting a cylindrical tube that is partially thin with respect to the circumferential direction once or twice with a flat cutter. It is possible to produce a grafting tube that gradually decreases toward the tip of the tube free end.

It is a front view of the rootstock and hogi for creating a grafted seedling. (A) is a partial cross-sectional front view of a grafted seedling in which a conventional grafting tube is externally fitted on the abutment / rootstock contact portion, and (b) is a cross-sectional view of a conventional grafting tube. (A)-(c) is a schematic diagram of the tube mounting head for externally fitting the grafting tube to the hogi / rootstock contact portion, and (a) is a tube finger between both free ends of the grafting tube. (B) shows a state in which both tube fingers are opened moderately, and (c) shows a state in which both tube fingers are opened widely. (A) is a top view which shows the cutting method of the cylindrical tube for producing the tube for grafting concerning one embodiment of this invention, (b) is the grafting created with the cutting method shown to (a) FIG. (A) is a top view which shows the cutting method of the cylindrical tube for producing the tube for grafting concerning another embodiment of this invention, (b) was created with the cutting method shown to (a). It is a top view of the tube for grafting. (A) is a top view which shows the cutting method of the cylindrical tube for producing the tube for grafting concerning another embodiment of this invention, (b) is created with the cutting method shown to (a). It is a top view of the tube for grafting.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. As shown in FIGS. 4 (b), 5 (b), and 6 (b), grafting tubes 12, 17, 23 that are externally fitted to the rootstock / hogi contact portion of the grafted seedling according to the present invention. These are both tubes having a substantially C-shaped cross section in which a tube gap extending linearly in the longitudinal direction of the cylindrical tube is formed on an annular wall (peripheral wall) of the cylindrical tube made of an elastic material. As an elastic material for forming the grafting tubes 12, 17, 23, for example, vinyl acetate resin, vinyl chloride resin, or the like can be used. In these grafting tubes 12, 17, and 23, the thicknesses of the two tube free ends 13, 14, 18, 19, 24, and 25 facing each other across the tube gap are respectively set at the tips of the tube free ends. It is gradually decreasing.

  In these grafting tubes 12, 17, 23, the two tube free ends 13, 14, 18, 19, 24, 25 facing each other across the tube gap gradually decrease toward the tip. Therefore, it is very soft and can be easily deformed or curved. For this reason, for example, when the grafting tubes 12, 17, and 23 are externally fitted to the rootstock / hogi contact portion of the grafted seedling by the method shown in FIGS. 3 (a) to 3 (c), the rootstock When the relative position between the hogi contact portion and the grafting tubes 12, 17 and 23 is slightly shifted, the grafting tubes 12, 17, and 23 return to their original shape due to their elastic force. Even if the free ends 13, 14, 18, 19, 24, and 25 collide with the peripheral surface of the rootstock / hogi abutting portion or rub the peripheral surface of the rootstock / hogi abutting portion, the tube free end The parts 13, 14, 18, 19, 24, 25 are easily deformed or curved. For this reason, damage does not occur in the rootstock or hogi (or the rootstock / hogi abutting portion). Therefore, when the grafting tubes 12, 17, 23 are externally fitted to the rootstock / hogi abutting portion of the grafted seedling, the rootstock or the hogi is formed by the tube free ends 13, 14, 18, 19, 24, 25. It is possible to effectively prevent the grafted seedling from being damaged.

Hereinafter, a specific configuration of the grafting tubes 12, 17, and 23 according to the present invention and a production method thereof will be described.
As shown in FIG.4 (b), in the grafting tube 12 which concerns on one embodiment of this invention, each surface which opposes across the tube gap of the two tube free ends 13 and 14 is respectively, The plane is parallel to the central axis direction of the grafting tube and is inclined with respect to the direction (plane) in which the diameter of the grafting tube 12 extends in the annular wall. Here, the width of the tube gap or the distance between the free ends 13 and 14 of the tubes is appropriately set according to the nature of the grafted seedling, the structure of the grafting device, and the like. Note that the width of the tube gap or the interval between the two tube free ends 13 and 14 may be zero as long as the two tube free ends 13 and 14 are cut from each other (both tube free ends 13 and 14). Is in contact.)

  As shown in FIG. 4 (a), this grafting tube 12 is made of a cylindrical tube 10 made of an elastic material and having a uniform annular wall thickness. It is produced by cutting across the end faces of the cylindrical tube 10 (in the vertical direction) at the cutting plane to form a tube gap and two tube free ends 13,14.

  This cut surface is a plane parallel to the central axis direction of the cylindrical tube. The cut surface is a plane that is inclined with respect to the direction in which the diameter of the cylindrical tube 10 extends in the annular wall. In the example shown in FIG. 4A, the tube gap is zero or very narrow because the single tube cutter 11 is used to cut the cylindrical tube 10 at one cut surface. However, if it is necessary to widen the tube gap, as shown by phantom lines, the cylindrical tube 10 can be cut at two cut surfaces by using two parallel tube cutters 11 and 11 ′ having a predetermined gap. Just cut it. In the example shown in FIG. 4A, the cut surface is flexible so that the tip angle of the tube free ends 13 and 14 becomes the smallest, that is, the thin wall portions of the tube free ends 13 and 14 become the longest. It is set to increase the performance.

  As shown in FIG. 5 (b), in the grafting tube 17 according to another embodiment of the present invention, the outer surfaces of the two tube free ends 18 and 19 are respectively centered on the grafting tube. The plane is parallel to the axial direction and perpendicular to the direction in which the diameter of the grafting tube 17 extends. Note that these two planes are on the same plane. Here, the width of the tube gap or the interval between the two tube free ends 18, 19 is appropriately set according to the nature of the grafted seedling, the structure of the grafting device, and the like. Note that the width of the tube gap or the distance between the free ends 18 and 19 may be 0 as long as the free ends 18 and 19 are cut (the free ends 18 and 19 are both Abutting.)

  As shown in FIG. 5 (a), this grafting tube 17 is made of a cylindrical tube 15 made of an elastic material and having a uniform annular wall thickness. It is produced by cutting across the end faces of the cylindrical tube 15 (in the vertical direction) at the cutting surface to form a tube gap and two tube free ends 18,19.

  This cut surface is a plane parallel to the central axis direction of the cylindrical tube. The cut surface is a plane perpendicular to the direction in which the diameter of the cylindrical tube 15 extends. In the example shown in FIG. 5 (a), the tube gap is zero or very narrow. However, if it is necessary to widen the tube gap, the cylindrical tube 15 may be cut at a more inner position by using a tube cutter 16 'as indicated by a virtual line. In the example shown in FIG. 5A, the cut surface is flexible so that the tip angle of the tube free ends 18 and 19 becomes the smallest, that is, the thin wall portions of the tube free ends 18 and 19 become the longest. It is set to increase the performance.

  As shown in FIG. 6 (b), in the grafting tube 23 according to yet another embodiment of the present invention, the outer peripheral side and inner peripheral side surfaces of the two tube free ends 24, 25 are Is also a curved surface. On the other hand, the surfaces of the two tube free ends 24 and 25 facing each other across the tube gap are parallel to each other and are generally parallel to the direction in which the diameter of the grafting tube 23 extends. Here, the width of the tube gap or the interval between the two tube free ends 24 and 25 is appropriately set according to the properties of the grafted seedling, the structure of the grafting device, and the like. The width of the tube gap or the interval between the two tube free ends 24, 25 may be zero as long as the tube free ends 24, 25 are cut from each other (both tube free ends 24, 25). Are in contact.)

As shown in FIG. 6A, the grafting tube 23 shown in FIG. 6B is produced in the following procedure.
(1) First, on the annular wall of the cylindrical tube 20 made of an elastic material, with respect to the circumferential direction of the cylindrical tube 20, a minimum thickness portion P is set at a predetermined portion, and on both sides of the minimum thickness portion P. Thin portions 21 and 21 ′ are formed in which the thickness gradually decreases toward the minimum thickness portion P. Thereafter, the minimum thickness portion P is cut with a tube cutter 22 in a plane parallel to the direction of the central axis of the cylindrical tube and parallel to the direction in which the diameter of the cylindrical tube 20 extends. Two tube free ends 24, 25 are formed.

  In the example shown in FIG. 6A, the tube gap is zero or very narrow because the cylindrical tube 20 is only cut by one cut surface using one tube cutter 22. However, if it is necessary to widen the tube gap, as shown by the phantom line, the cylindrical tube 20 is fixed to the minimum thickness portion using two tube cutters 22 and 22 'having a predetermined gap and parallel to each other. What is necessary is just to cut | disconnect by two cut surfaces of P vicinity.

  The cylindrical tubes 10 and 15 made of an elastic material and having a uniform peripheral wall thickness are cut once or twice by the flat cutters 11 and 16 by any of the above-described methods for producing the grafting tubes 12, 17 and 23. Alternatively, the cylindrical tube 20 that is partially thin with respect to the circumferential direction of the tube made of an elastic material is opposed to the tube gap with a simple process of cutting once or twice with a flat cutter 22. Two tube free ends 13, 14, 18, 19, 24, 25 can be produced, respectively, with grafting tubes 12, 17, 23 gradually decreasing towards the tube free end tips. .

  1 rootstock, 2 hogi, 3 grafting seedlings, 4 conventional grafting tube, 5 tube mounting head, 6 tube finger, 7 tube finger, 8 free end of conventional grafting tube, 9 free of conventional grafting tube End, 10 Cylindrical tube, 11 Tube cutter, 12 Tube for grafting, 13 Tube free end, 14 Tube free end, 15 Cylindrical tube, 16 Tube cutter, 17 Tube for grafting, 18 Tube free end, 19 tube Free end, 20 cylindrical tube with thin wall, 21 thin wall, 22 tube cutter, 23 grafting tube, 24 tube free end, 25 tube free end, P minimum wall thickness.

Claims (6)

A tube for grafting that is externally fitted to the rootstock / hogi contact portion of the grafted seedling, in which a tube gap extending in the longitudinal direction of the cylindrical tube is formed on the annular wall of the cylindrical tube made of an elastic material,
A grafting tube, wherein the thicknesses of two tube free ends facing each other across the tube gap gradually decrease toward the tip of the tube free end.   Each surface of the two tube free ends facing each other across the tube gap is parallel to the direction of the center axis of the grafting tube, and the diameter of the grafting tube extends in the annular wall. The grafting tube according to claim 1, wherein the grafting tube is an inclined plane.   Each surface on the outer peripheral side of the two tube free ends is a plane parallel to the center axis direction of the grafting tube and perpendicular to the direction in which the diameter of the grafting tube extends, and both the planes are The grafting tube according to claim 1, wherein the grafting tube is on the same plane. A method for producing a grafting tube according to claim 2,
By cutting the annular wall of the cylindrical tube made of an elastic material in a plane parallel to the direction of the central axis of the cylindrical tube and inclined with respect to the direction in which the diameter of the cylindrical tube extends in the annular wall A method for producing a grafting tube, wherein the tube gap and the two free ends of the tube are formed. A method for producing a grafting tube according to claim 3,
By cutting the annular wall of the cylindrical tube made of an elastic material in a plane parallel to the direction of the central axis of the cylindrical tube and perpendicular to the direction in which the diameter of the cylindrical tube extends, the tube gap and the 2 A method for producing a grafting tube, characterized by forming two free ends of the tube. A method for producing a grafting tube according to claim 1,
On the annular wall of the cylindrical tube made of an elastic material, with respect to the circumferential direction of the cylindrical tube, a minimum thickness portion is set at a predetermined portion, and then the minimum thickness portion is set on both sides of the minimum thickness portion. Form a thin part where the thickness gradually decreases toward the
The tube gap and the two tube free ends are cut by cutting the minimum thickness portion in a plane parallel to the cylindrical tube central axis direction and parallel to the direction in which the diameter of the cylindrical tube extends. A method for producing a grafting tube, characterized in that it is formed.

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