Sweet potato cultivation device

Abstract

To provide a cultivator for yam, which has a guide rod that can be locked to the cultivator body, and can add various functions to it, thereby improving the production efficiency of the yam. [Solution] The cultivator body 2 is provided with a guide rod 4 which can be engaged at a predetermined position and which supports the end face F of the upper cultivator body 2 while engaged with the lower cultivator body 2, and the guide rod 4 supports the upper cultivator body 2 at a predetermined distance in the height direction relative to the lower cultivator body 2, thereby forming a gap S for growing wild yam J between the groove portion 3 of the upper cultivator body 2 and the groove portion 3 of the lower cultivator body 2, and the lower cultivator body 2 and the upper cultivator body 2 can be installed sequentially with a predetermined offset in the longitudinal direction β.

Description

[Technical Field]

[0001] The present invention relates to a cultivation device for cultivating yams such as wild yams. [Background technology]

[0002] The wild yam, a type of yam, is a climbing perennial herb native to Japan that is highly nutritious and is expected to have a nutritious and strengthening effect. To cultivate such wild yam in a field, it is preferable to grow it by carefully adjusting the soil quality, moisture content, etc., and conventionally, it has been cultivated using a yam cultivator that can accommodate and cultivate individual yams. Such a conventional yam cultivator, as disclosed in Patent Document 1, for example, consists of a half-pipe filled with soil, and new yams (wild yams) grown from seed yams grow longitudinally within the pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-292632 Summary of the Invention [Problem to be solved by the invention]

[0004] However, although the above-mentioned conventional yam cultivators can successfully cultivate yam in fields, because one yam is housed in one half pipe for cultivation, production efficiency is low, and there has been a growing need among producers to improve the production efficiency of yam (yamaimo).In addition, because one half pipe is buried in the soil at an angle to cultivate the yam, the area of ​​the field required to cultivate one yam becomes large, further worsening production efficiency.

[0005] Therefore, the present applicant has conducted extensive research into cultivators for yam to improve the production efficiency of wild yam. The inventors have come up with the idea of ​​forming multiple grooves across the width of the cultivator body, storing yams in each groove, and stacking multiple cultivator bodies in upper and lower tiers. However, this approach results in the problem that the grooves of the upper cultivator body and the lower cultivator body overlap without any gaps, making it difficult to ensure sufficient space for the yams to grow. This problem is not limited to wild yam, a type of yam, but also occurs in cultivators for cultivating other yams, such as nagaimo.

[0006] In addition, in the past, a guide rod (a piece of wood or the like separate from the cultivator body) was inserted near the cultivator body installed in the field to serve as a guide for the position where the seed potatoes should be placed. However, the applicant has come to consider engaging the guide rod with the cultivator body, which would not only serve as a guide for the position where the seed potatoes should be placed, but also allow for the longitudinal positioning of the lower and upper cultivator bodies, and has further come to consider adding other functions to the guide rod.

[0007] The present invention has been made in view of the above circumstances, and its object is to provide a cultivator for yam that has a guide rod that can be attached to the cultivator body, allowing various functions to be added, thereby improving the production efficiency of yam. [Means for solving the problem]

[0008] The invention of claim 1 is a cultivator for yam, which comprises a cultivator body having a plurality of grooves formed in a line in the width direction and capable of accommodating yams, and which can be arranged at an angle while being stacked in multiple tiers, and which can accommodate yams by accommodating them in the grooves of the cultivator bodies located in the upper and lower tiers, and which is characterized in that it is capable of being engaged at a predetermined position on the cultivator body and is provided with a guide rod which supports the end face of the cultivator body of the upper tier when engaged with the cultivator body of the lower tier, and which supports the cultivator body of the upper tier at a predetermined distance in the height direction relative to the cultivator body of the lower tier, thereby forming a gap for growing yams between the grooves of the cultivator body of the upper tier and the grooves of the cultivator body of the lower tier, and which can be installed sequentially with the cultivator body of the lower tier offset by a predetermined distance in the longitudinal direction.

[0009] The invention of claim 2 is characterized in that, in the yam cultivation device described in claim 1, the cultivation device body has a wave-shaped configuration curved in the width direction, and the wave-shaped recesses are the groove portions.

[0010] The invention of claim 3 is characterized in that, in the yam cultivation device described in claim 1, the guide rod consists of a long portion that can be extended in the vertical direction, and has a rod-shaped portion that can be engaged with the cultivation device main body, and a support portion formed on the rod-shaped portion that supports the cultivation device main body on the upper level at a predetermined height from the cultivation device main body on the lower level.

[0011] The invention of claim 4 is characterized in that, in the yam cultivation device described in claim 3, the support portion abuts and supports the area between adjacent groove portions in the cultivation device body of the upper level.

[0012] The invention of claim 5 is characterized in that, in the yam cultivation device described in claim 1, the guide rod positions the cultivation device body on the lower level and the cultivation device body on the upper level while offsetting them in the longitudinal direction, and also serves as a placement position marker indicating the position where the seed yam should be placed.

[0013] The invention of claim 6 is characterized in that, in the yam cultivation device described in claim 5, the guide rod is formed with a height position mark that indicates the height position of the soil to be placed on top of the cultivation device body.

[0014] The invention according to claim 7 is the cultivation device for yam according to any one of claims 1 to 6, characterized in that the yam cultivated in the cultivation device body is made of wild yam. [Effects of the Invention]

[0015] According to the invention of claim 1, a guide rod is provided which can be engaged at a predetermined position on the cultivator body and which supports the end face of the upper cultivator body while engaged with the lower cultivator body, and the guide rod supports the upper cultivator body at a predetermined distance in the vertical direction relative to the lower cultivator body, thereby forming a gap for the yam to grow between the groove of the upper cultivator body and the groove of the lower cultivator body, and the lower cultivator body and the upper cultivator body can be installed sequentially with a predetermined offset in the longitudinal direction.Therefore, by having a guide rod which can be engaged with the cultivator body, various functions can be added and the production efficiency of yam can be improved.

[0016] According to the invention described in claim 2, the cultivator body is formed in a wavy shape curved in the width direction, and the recesses of the wavy shape are made into grooves, so that the rigidity of the cultivator body can be improved and the cultivator body can be constructed using wavy general-purpose parts.

[0017] According to the invention described in claim 3, the guide rod consists of a long portion that can be extended in the vertical direction, and has a rod-shaped portion that can be engaged with the cultivator body, and a support portion formed on the rod-shaped portion that supports the upper cultivator body at a predetermined height from the lower cultivator body, so that the upper cultivator body can be securely supported while the guide rod is securely engaged with the cultivator body.

[0018] According to the invention of claim 4, the support portion abuts against and supports the portion between adjacent groove portions in the upper cultivator body, so that the upper cultivator body can be supported in a stable state.

[0019] According to the invention described in claim 5, the guide rod positions the lower cultivator body and the upper cultivator body while offsetting them in the longitudinal direction, and also serves as a placement position marker indicating the position where the seed potatoes are placed, so that the guide rod can serve both the function of positioning the cultivator body and the function of marker for the seed potatoes.

[0020] According to the invention described in claim 6, the guide rod is formed with a height position mark that indicates the height position of the soil to be placed above the cultivation vessel body, so that in addition to the function of positioning the cultivation vessel body and the function of marking the seed potatoes, the guide rod can also serve as a mark for the height of the soil to be placed above.

[0021] According to the invention described in claim 7, the yam cultivated in the cultivation vessel body is made from wild yam, so even if the cultivation vessel bodies are stacked one on top of the other, a gap can be secured for the wild yam to grow, thereby improving the production efficiency of wild yam. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a schematic diagram showing a state in which a yam cultivator according to a first embodiment of the present invention is installed in a field. [Figure 2] A side view showing the same yam cultivation device. [Figure 3] Cross section of line III-III in Figure 2 [Figure 4] Cross section of line IV-IV in Figure 3 [Figure 5] FIG. 10 is a perspective view showing the main body of the cultivator for yam. [Figure 6] FIG. 10 is a front view showing the main body of the cultivator for yam. [Figure 7] FIG. 10 is a perspective view showing the guide rod of the yam cultivation device. [Figure 8] A schematic diagram showing how wild yam is grown in the same yam cultivation device. [Figure 9] A side view showing the state of cultivating wild yam in the same cultivator for yam [Figure 10] A front view showing the state of cultivating wild yam in the same cultivator for yam [Figure 11]FIG. 10 is a perspective view showing the cultivator body and the guide rod of the yam cultivator according to the second embodiment of the present invention. [Figure 12] FIG. 10 is a perspective view showing the guide rod of the yam cultivation device. [Figure 13] FIG. 10 is a cross-sectional view showing the state in which the guide rod of the yam cultivator supports the cultivator body. [Figure 14] FIG. 10 is a perspective view showing the cultivator body and the guide rod of the yam cultivator according to the third embodiment of the present invention. [Figure 15] FIG. 10 is a perspective view showing the guide rod of the yam cultivation device. [Figure 16] FIG. 10 is a cross-sectional view showing the state in which the guide rod of the yam cultivator supports the cultivator body. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The yam cultivation device 1 of the first embodiment is for cultivating wild yam in a field, and as shown in Figures 1 to 7, has a cultivation device main body 2 with a groove portion 3 formed therein and a guide rod 4, and can be installed by stacking the cultivation device main body 2 in multiple layers vertically and tilting it at a predetermined angle γ (see Figure 2) while buried in the soil of the field (in the ridge D in Figure 8).

[0024] The cultivator body 2 is made of a member formed by molding resin into a predetermined shape, and has multiple (two in this embodiment) grooves 3 arranged side by side in the width direction α, each capable of accommodating Japanese yam (Japanese yam J in this embodiment). The cultivator body 2 in this embodiment has a wave-like shape curved in the width direction α, and two adjacent recesses in this wave-like shape form the grooves 3. The grooves 3 are made of a section formed into an arc-shaped cross section, and extend in the longitudinal direction β of the cultivator body 2, as shown in Figure 5.

[0025] Furthermore, when manufacturing the cultivator body 2 by resin molding (extrusion molding), it is preferable to form it with a substantially uniform wall thickness throughout. Furthermore, the arc shape (cross-sectional shape) of the groove portion 3 may have a larger or smaller curvature than the shape shown in Figure 6. As shown in Figures 5 and 6, the cultivator body 2 according to this embodiment has a tip surface t1 consisting of a curved surface that protrudes upward, and a bottom surface t2 consisting of a curved surface recessed in a groove shape.

[0026] Furthermore, the yam cultivator 1 according to this embodiment is capable of attaching a guide rod 4, as shown in Figures 1 to 5. The guide rod 4 is capable of being inserted into and locked in a locking hole h formed in a predetermined position (the position between the pair of grooves 3) of the cultivator body 2, as shown in Figure 5, and is configured to support the upper cultivator body 2 at a predetermined distance in the height direction relative to the lower cultivator body 2 when locked to the lower cultivator body 2.

[0027] 4 and 7, the guide rod 4 according to this embodiment is made up of a long section that can be extended in the vertical direction, and has a rod-shaped section 4a that can be engaged with the cultivator body 2, and a support section 4b that is formed integrally with the rod-shaped section 4a and supports the upper cultivator body 2 at a predetermined height from the lower cultivator body 2. The support section 4b according to this embodiment is made up of a rectangular section that protrudes laterally from the rod-shaped section 4a, and has a mounting surface 4ba on the bottom and a support surface 4bb on the top, with the dimension between the mounting surface 4ba and the support surface 4bb being dimension u.

[0028] When the guide rod 4 according to this embodiment is inserted into the locking hole h of the cultivator body 2 and locked, the attachment surface 4ba comes into contact with the tip surface t1 of the cultivator body 2 and is supported on the cultivator body 2, as shown in Fig. 5. When the upper cultivator body 2 is placed on top of the lower cultivator body 2, the bottom surface t2 of the upper cultivator body 2 (the bottom surface t2 at the portion between the adjacent groove portions 3 of the upper cultivator body 2) comes into contact with the support surface 4bb of the guide rod 4 and is placed on top of the lower cultivator body 2, as shown in Figs. 3 and 4, and the cultivator bodies 2 are supported at a predetermined distance u in the height direction.

[0029] Furthermore, the guide rod 4 according to this embodiment has a first height position mark 4c formed in a spherical shape at a predetermined position on the rod-shaped portion 4a, and a second height position mark 4d formed in a spherical shape at a predetermined distance above the first height position mark 4c, as shown in Fig. 7. The first height position mark 4c and the second height position mark 4d can be formed in a spherical shape, a triangular shape when viewed from the side, or any other shape.

[0030] On the other hand, the locking hole h consists of an opening formed at a position spaced a predetermined distance d from the end face F of the cultivator body 2. When the guide rod 4 is inserted into the locking hole h formed at a predetermined position on the cultivator body 2, the mounting surface 4ba of the support part 4b abuts against the edge of the opening of the locking hole h, and the guide rod 4 is held in a vertically extended state, as shown in Figure 4. When the cultivator bodies 2 are stacked one above the other in multiple tiers, the guide rod 4 locked to the cultivator body 2 in this way can be positioned by offsetting the lower cultivator body 2 from the upper cultivator body 2 in the longitudinal direction β (by shifting their positions in the longitudinal direction β).

[0031] In other words, in each of the multiple overlapping cultivator bodies 2, a guide rod 4 is engaged in a locking hole h at a predetermined position (a position spaced a predetermined distance d from the end face F of the cultivator body 2), so that by abutting the end face F of the upper cultivator body 2 against the guide rod 4 engaged in the lower cultivator body 2, the lower cultivator body 2 and the upper cultivator body 2 can be positioned by offsetting them by a predetermined distance (dimension d) in the longitudinal direction β, and they can be installed sequentially in predetermined locations in the field.

[0032] Furthermore, as described above, the guide rods 4 according to this embodiment position the lower cultivator body 2 and the upper cultivator body 2 while offsetting them by the dimension d in the longitudinal direction β, so that the distance between adjacent guide rods 4 is constant (dimension d), and these can serve as placement position markers that indicate the position for placing the seed potato T. In other words, if a seed potato T is placed between adjacent guide rods 4, the newly grown wild yam J of that seed potato will enter the grooves 3 of the cultivator body 2 and be able to be cultivated, as shown in Figures 9 and 10.

[0033] Furthermore, the first height position mark 4c and the second height position mark 4d formed on the guide rod 4 indicate the height of the soil to be placed above the cultivator bodies 2 when they are stacked on top of each other. For example, after the soil is placed up to the height H1 of the first height position mark 4c, seed potatoes T are placed on the soil, and then soil is placed up to the height H2 of the second height position mark 4d to form ridges.

[0034] Next, a method for cultivating wild yam using the yam cultivator 1 according to this embodiment will be described. First, prepare multiple cultivator bodies 2 and insert and lock the guide rods 4 into the locking holes h formed in each cultivator body 2 (see Figure 5). Then, with a certain amount of soil piled up in the grooves 3, one cultivator body 2 is placed in a groove formed in the field while tilting it at a predetermined angle γ, and another cultivator body 2 is placed on top of it.

[0035] At this time, the upper cultivator body 2 is supported on the support surface 4bb of the guide rod 4 engaged with the lower cultivator body 2, and its end face F is brought into contact with it, thereby offsetting the lower cultivator body 2 and the upper cultivator body 2 by a predetermined dimension (dimension d) in the longitudinal direction β. By positioning and installing the cultivator bodies 2 sequentially toward the upper tier in this way, multiple cultivator bodies 2 can be stacked while being tilted at a predetermined angle γ, as shown in Figures 1 and 2.

[0036] Here, the guide rod 4 of this embodiment supports the upper cultivator body 2 by placing it on the support surface 4bb of the support portion 4b, so that, as shown in Figures 2 to 4, the upper cultivator body 2 can be supported at a predetermined height distance (u) from the lower cultivator body 2, and a gap S can be formed between the groove portion 3 of the upper cultivator body 2 and the groove portion 3 of the lower cultivator body 2 for growing wild yam J (yamaimo).

[0037] Then, soil is piled up to the height of the first height position mark 4c on the guide rod 4, and soil to a height H1 is applied to cover the top of the multiple cultivator bodies 2, and seed potatoes T are placed between adjacent guide rods 4 (left and right positions corresponding to the grooves 3 as shown in Figure 10). After all the seed potatoes T have been placed, soil is piled up to the height of the second height position mark 4d on the guide rod 4, and ridges D to a height H2 are formed as shown in Figure 8.

[0038] By burying the seed potatoes T in the furrows D in this way, as the seed potatoes T grow, the vines become entangled and supported by the net N, and the wild yam J as a new potato grows within the grooves 3 of the cultivator body 2. The wild yam J growing within the grooves 3 will grow in the extension direction of the grooves 3 (the longitudinal direction β of the cultivator body 2), and by cultivating it for a predetermined period of time, the wild yam J of the desired size can be harvested.

[0039] Next, a second embodiment of the present invention will be described. The yam cultivator 1' according to the second embodiment, like the first embodiment, is for cultivating wild yam in a field, and as shown in Figures 11 to 13, has a cultivator body 2 with grooves 3 formed therein and a guide rod 4', and can be installed by stacking the cultivator bodies 2 vertically in multiple layers and tilting them at a predetermined angle γ (see Figure 2) while buried in the soil of the field (in the ridge D in Figure 8). Note that the cultivator body 2 is the same as that of the first embodiment, so a detailed description will be omitted.

[0040] 12, the guide rod 4' according to this embodiment is made up of a long section that can be extended in the vertical direction, and has a rod-shaped section 4'a that can be engaged with the cultivator body 2, and a support section 4'b that is formed integrally with the rod-shaped section 4'a and supports the upper cultivator body 2 at a predetermined height from the lower cultivator body 2. The support section 4'b according to this embodiment is made up of a rectangular section that protrudes laterally from the rod-shaped section 4'a, and has a mounting surface 4'ba on the underside and a cutout section 5, with the dimension between the mounting surface 4'ba and the cutout section 5 being dimension u.

[0041] As shown in Fig. 11, the notch 5 has a concave shape that allows it to be inserted and supported over the end face F of the upper cultivator body 2 at a predetermined position (the position between the pair of grooves 3). When the guide rod 4' according to this embodiment is inserted and locked into the locking hole h of the cultivator body 2, the attachment surface 4'ba comes into contact with the protruding end face t1 of the cultivator body 2 and is supported on the cultivator body 2, as shown in Figs. 11 and 13.

[0042] When the upper cultivator body 2 is placed on top of the lower cultivator body 2, as shown in Figures 11 and 13, the end face F of the upper cultivator body 2 (the end face F at the portion between adjacent groove portions 3 in the upper cultivator body 2) abuts against the concave wall surface that forms the cutout portion 5 of the guide rod 4', so that the cultivator body 2 is supported at a predetermined distance u in the vertical direction.

[0043] Furthermore, the guide rod 4' according to this embodiment has a first height position mark 4'c formed in a spherical shape at a predetermined position on the rod-shaped portion 4'a, and a second height position mark 4'd formed in a spherical shape at a predetermined distance above the first height position mark 4'c, as shown in Figure 12. Note that the first height position mark 4'c and the second height position mark 4'd are equivalent to the first height position mark 4c and the second height position mark 4d in the first embodiment, and a more detailed description thereof will be omitted.

[0044] As in the first embodiment, the locking hole h formed in the cultivator body 2 is an opening formed at a position spaced a predetermined distance d from the end face F of the cultivator body 2. When the guide rod 4' is inserted into the locking hole h formed at a predetermined position in the cultivator body 2, the attachment surface 4'ba of the support part 4'b abuts against the edge of the opening of the locking hole h, and the guide rod 4' is held in a vertically extended state. When the cultivator bodies 2 are stacked one above the other in multiple tiers, the guide rod 4' locked to the cultivator body 2 in this way can be used to position the lower cultivator body 2 and the upper cultivator body 2 while offsetting them in the longitudinal direction β (by shifting their positions in the longitudinal direction β).

[0045] In other words, in each of the multiple overlapping cultivator bodies 2, a guide rod 4' is engaged in a locking hole h at a predetermined position (a position spaced a predetermined distance d from the end face F of the cultivator body 2), so that by abutting the end face F of the upper cultivator body 2 against the guide rod 4' engaged in the lower cultivator body 2, the lower cultivator body 2 and the upper cultivator body 2 can be positioned by offsetting them by a predetermined distance (dimension d) in the longitudinal direction β, and they can be installed sequentially in predetermined locations in the field.

[0046] Next, a third embodiment of the present invention will be described. The yam cultivator 1" of the third embodiment, like the first embodiment, is for cultivating wild yam in a field, and as shown in Figures 14 to 16, has a cultivator body 2 with a groove portion 3 formed therein and a guide rod 4", and can be installed by stacking the cultivator bodies 2 vertically in multiple layers and tilting them at a predetermined angle γ (see Figure 2) while buried in the soil of the field (in the ridge D in Figure 8). Note that the cultivator body 2 is the same as in the first embodiment, so a detailed description will be omitted.

[0047] As shown in Figure 15, the guide rod 4" of this embodiment consists of a long portion that can be extended in the vertical direction, and has a rod-shaped portion 4"a that can be engaged with the cultivator body 2, a support portion 6 that is formed integrally with the rod-shaped portion 4"a and supports the upper cultivator body 2 at a predetermined height from the lower cultivator body 2, and a large diameter portion 7. The support portion 6 of this embodiment consists of a bent portion 6a that is bent in a U-shape halfway along the rod-shaped portion 4"a, and the dimension between the large diameter portion 7 and the bent portion 6a is dimension u.

[0048] As shown in Fig. 14, the bent portion 6a has a concave shape that allows it to be inserted into and supported by the end face F of the upper cultivator body 2 at a predetermined position (the position between the pair of groove portions 3). When the guide rod 4" according to this embodiment is inserted into and locked in the locking hole h of the cultivator body 2, the large diameter portion 7 comes into contact with the protruding end face t1 of the cultivator body 2 and is supported on the cultivator body 2, as shown in Figs. 14 and 16.

[0049] When the upper cultivator body 2 is placed on top of the lower cultivator body 2, as shown in Figures 14 and 16, the end face F of the upper cultivator body 2 (the end face F at the part between the adjacent groove portions 3 of the upper cultivator body 2) comes into contact with the concave wall surface constituting the bent portion 6a of the guide rod 4" and is placed on the cultivator body 2, so that the cultivator body 2 is supported at a predetermined distance u in the height direction.

[0050] Furthermore, as shown in FIG. 15, the guide rod 4" according to this embodiment has a first height position mark 4"c formed in a spherical shape at a predetermined position on the rod-shaped portion 4"a, and a second height position mark 4"d formed in a spherical shape at a predetermined distance above the first height position mark 4"c. Note that the first height position mark 4"c and the second height position mark 4"d are equivalent to the first height position mark 4c and the second height position mark 4d in the first embodiment, and a more detailed description thereof will be omitted.

[0051] As in the first embodiment, the locking hole h formed in the cultivator body 2 is an opening formed at a position spaced a predetermined distance d from the end face F of the cultivator body 2. When the guide rod 4" is inserted into the locking hole h formed at a predetermined position in the cultivator body 2, the large diameter portion 7 abuts against the edge of the opening of the locking hole h, and the guide rod 4" is held in a state of being extended in the vertical direction. When the cultivator bodies 2 are stacked one above the other in multiple tiers, the guide rod 4" locked to the cultivator body 2 in this way can be positioned by offsetting the lower tier cultivator body 2 from the upper tier cultivator body 2 in the longitudinal direction β (by shifting their positions in the longitudinal direction β).

[0052] That is, in each of the multiple overlapping cultivator bodies 2, a guide rod 4'' is engaged in the engagement hole h at a predetermined position (a position spaced a predetermined distance d from the end face F of the cultivator body 2), so that by abutting the end face F of the upper cultivator body 2 against the guide rod 4'' engaged in the lower cultivator body 2, the lower cultivator body 2 and the upper cultivator body 2 can be positioned by offsetting them by a predetermined distance (dimension d) in the longitudinal direction β, and they can be installed sequentially in predetermined locations in the field.

[0053] The yam cultivators 1, 1', 1" according to the first to third embodiments are provided with guide rods (4, 4', 4") that can be locked at predetermined positions on the cultivator body 2 and support the end face F of the upper cultivator body 2 while locked to the lower cultivator body 2, and the guide rods (4, 4', 4") support the upper cultivator body 2 at a predetermined height distance from the lower cultivator body 2, thereby forming a gap S for growing the wild yam J between the groove portion 3 of the upper cultivator body 2 and the groove portion 3 of the lower cultivator body 2, and the lower cultivator body 2 and the upper cultivator body 2 can be installed sequentially with a predetermined offset in the longitudinal direction β. Therefore, by having the guide rods (4, 4', 4") that can be locked to the cultivator body 2, various functions can be added, and the production efficiency of the wild yam J can be improved.

[0054] Furthermore, the cultivator body 2 according to this embodiment has a wave-like shape curved in the width direction α, and the recesses of this wave-like shape are the grooves 3, which improves the rigidity of the cultivator body 2 and allows the cultivator body 2 to be constructed using general-purpose wave-like members. In particular, since the cultivator body 2 according to this embodiment has a wave-like shape curved in the width direction α, it is possible to improve the rigidity and increase the load-bearing capacity and maintain the shape when soil is placed in the grooves 3. Furthermore, since the cultivator body 2 according to this embodiment has a stable shape with a wave-like shape in the width direction α, it is easy to store when not in use.

[0055] Furthermore, the guide rod (4, 4', 4") according to this embodiment is made up of a long portion that can be extended in the vertical direction, and has rod-shaped portions (4a, 4'a, 4"a) that can be engaged with the cultivator body 2, and support portions (4b, 4'b, 6) that are formed on the rod-shaped portions (4a, 4'a, 4"a) and support the upper cultivator body 2 at a predetermined height from the lower cultivator body 2, so that the guide rod (4, 4', 4") can be reliably engaged with the cultivator body 2 while reliably supporting the upper cultivator body 2.

[0056] In addition, the support parts (4b, 4'b, 6) of this embodiment abut against and support the areas between adjacent groove parts 3 in the upper cultivator body 2, so that the upper cultivator body 2 can be supported in a stable state. Furthermore, the guide rods (4, 4', 4") of this embodiment position the lower cultivator body 2 and the upper cultivator body 2 while offsetting them in the longitudinal direction β, and also serve as placement position markers that indicate the position where the seed potato T is to be placed, so that the guide rods (4, 4', 4") can serve both the function of positioning the cultivator body 2 and the function of markers for the seed potato T.

[0057] Furthermore, the guide rods (4, 4', 4") according to this embodiment are formed with height position markers that indicate the height of the soil to be placed on top of the cultivator main body 2. Therefore, the guide rods (4, 4', 4") can serve as markers for the height of the soil to be placed on top of the cultivator main body 2, in addition to the function of positioning the cultivator main body 2 and markers for the seed potatoes T. Furthermore, since the yam cultivated in the cultivator main body 2 is made of wild yam J, even when the cultivator main bodies 2 are stacked one on top of the other, a gap S for the wild yam J to grow can be secured, improving the production efficiency of the wild yam J. The wild yam J cultivated in this embodiment is a climbing perennial plant of the genus Dioscorea in the family Dioscoreaceae. The tuber part grows underground like other yams and typically grows to a length of about 1 to 1.3 m and a diameter of about 3 cm.

[0058] Although the present embodiment has been described above, the present invention is not limited to this, and for example, the yam cultivation vessel (1, 1', 1") is not limited to cultivation of wild yam J, but may also be used to cultivate other yam such as Chinese yam. Furthermore, the yam cultivation vessel (1, 1', 1") according to the present embodiment has two groove portions 3 formed in the width direction α of the cultivation vessel body 2, but may have three or more groove portions 3 formed in the width direction α of the cultivation vessel body 2.

[0059] Furthermore, in the yam cultivation device (1, 1', 1") of this embodiment, the cultivation device body 2 is made of a material made by molding resin into a predetermined shape, but it may also be obtained by molding (press molding, etc.) other materials such as metal. Furthermore, the guide rods (4, 4', 4") may be of other shapes or have other functions. [Industrial Applicability]

[0060] The present invention can also be applied to devices with different external shapes or devices with additional functions, provided that they have the same gist as the present invention. [Explanation of symbols]

[0061] 1, 1', 1” yam cultivator 2 Cultivator body 3 Groove 4, 4', 4" guide rod 4a Rod-shaped part 4b Support part 4ba mounting surface 4bb support surface 4c First height position marker 4d Second height position mark 5 Notch 6 Support part 6a Bend part 7 Large diameter section S gap h Locking hole F end face α Width direction β Longitudinal direction L Thickness dimension of thick part t1 Tip face t2 bottom w1 Top surface w2 Lower end surface T Seed potato J Wild yam (new yam) N Net D ridge

Claims

1. A cultivator for yam, comprising a cultivator body in which a plurality of grooves capable of accommodating yam are formed in a line in the width direction, and the cultivator bodies can be stacked in a plurality of tiers and tilted, and yam can be cultivated by accommodating yam in the grooves of the cultivator bodies located in the upper and lower tiers, A cultivator for yam is provided with a guide rod that can be engaged at a predetermined position on the cultivator body and supports the end face of the upper cultivator body while engaged with the lower cultivator body, and the guide rod supports the upper cultivator body at a predetermined distance in the height direction relative to the lower cultivator body, thereby forming a gap for growing yam between the groove portion of the upper cultivator body and the groove portion of the lower cultivator body, and the lower cultivator body and the upper cultivator body can be installed sequentially with a predetermined offset in the longitudinal direction.

2. 2. The cultivation vessel for yam according to claim 1, wherein the cultivation vessel body has a wave shape curved in the width direction, and the recesses of the wave shape serve as the grooves.

3. The guide stick is A rod-shaped portion consisting of a long portion that can be extended in the vertical direction and can be engaged with the cultivator body; A support portion formed on the rod-shaped portion, which supports the upper cultivator body at a predetermined height from the lower cultivator body; 2. The yam cultivation device according to claim 1, further comprising:

4. 4. The yam cultivator according to claim 3, wherein the support portion abuts against and supports a portion of the upper cultivator body between adjacent grooves.

5. The yam cultivator according to claim 1, characterized in that the guide rod positions the lower cultivator body and the upper cultivator body while offsetting them in the longitudinal direction, and also serves as a placement position marker indicating the position where the seed potato is to be placed.

6. 6. The yam cultivator according to claim 5, wherein the guide rod is formed with a height position mark indicating the height of the soil to be placed over the cultivator body.

7. The cultivation device for yam according to any one of claims 1 to 6, characterized in that the yam cultivated in the cultivation device body is made of wild yam.

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