Strip-like sheet material pressing fixture

Abstract

To provide a strip-like sheet material pressing fixture capable of pressing and fixing a sheet-like material such as a weed-control sheet onto the ground in a stable state.SOLUTION: A strip-like sheet material pressing fixture for pressing and fixing a sheet-like material 7 onto the ground via presser pins, includes pressing object parts 5 on a surface of a pressing plate 2 extending in the longitudinal direction, and comes into contact with the sheet-like object at the back surface of the pressing plate 2 to press and fix the sheet-like object to the ground. A presser pin has a pressing part for pressing the pressing object part 5, at an upper end of a pin body. The pressing plate includes, at each of both ends in the longitudinal direction, an insertion part 15 through which the pin body can be inserted, where a plurality of insertion parts 15 are provided at a longitudinal intermediate part, at prescribed intervals apart in the longitudinal direction. When the pin body inserted through the insertion part 15 is inserted into the ground, the pressing part presses the pressing object part 5 toward the ground.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a strip-shaped sheet-like object pressing and fixing tool that presses and fixes a sheet-like object such as a weed control sheet to the ground via a pressing pin.

Background Art

[0002] As a sheet-like object pressing and fixing tool used for pressing and fixing a sheet-like object such as a weed control sheet to the ground, the sheet fixing tools described in Patent Document 1 and Patent Document 2 have been proposed.

[0003] In the sheet fixing tool according to Patent Document 1, circular plates with holes are continuously provided at both ends of a pressing plate that presses the weed control sheet. Although Patent Document 1 does not specify a specific usage state for pressing and fixing the weed control sheet to the ground, it can be understood as follows from the entire description of Patent Document 1. That is, with the pressing plate pressed against the surface of the weed control sheet, a fixing pin inserted through the communicating holes of the circular plates that are overlapped with each other is driven into the ground with a hammer, and the head of the pin is pressed against the circular plate, thereby pressing and fixing the weed control sheet to the ground.

[0004] However, when pressing and fixing the weed control sheet to the ground in this way, since holes are provided only in the circular plates continuously provided at both ends of the pressing plate, the following problems occur. That is, when driving the fixing pin inserted through the communicating holes into the ground, if the lower end of the fixing pin hits an obstacle such as a stone in the soil, the fixing pin may not be driven in any further. In this case, the weed control sheet cannot be pressed and fixed to the ground.

[0005] On the other hand, the sheet fixing tool described in Patent Document 2 includes a resin-made fixing band having a bandwidth that can be laid across the peripheral ground adjacent to the peripheral edge of the weed control sheet and a fixing pin, and has a configuration in which the fixing band is fixed to the ground with the fixing pin at both side portions of the peripheral edge.

[0006] However, although the sheet fixture with such a configuration can indirectly press the peripheral edge of the weed control sheet against the ground via the fastening band, it cannot directly press and fix the peripheral edge against the ground in a stable state.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] The present invention has been developed in view of the above-mentioned conventional problems, and an object thereof is to provide a strip-shaped sheet-like object pressing fixture capable of pressing and fixing a sheet-like object such as a weed control sheet against the ground in a stable state.

Means for Solving the Problems

[0009] To solve the above problems, the present invention adopts the following means. That is, a first aspect of the strip-shaped sheet-like object pressing fixture according to the present invention is a strip-shaped sheet-like object pressing fixture that presses and fixes a sheet-like object against the ground via a pressing pin. The strip-shaped pressing plate extending in the longitudinal direction has a portion to be pressed on its surface, and abuts against the sheet-like object on the back surface of the pressing plate to press and fix the sheet-like object against the ground. The pressing pin has a pressing portion for pressing the portion to be pressed at the upper end of the pin body. At least four insertion portions are provided in the longitudinal direction of the pressing plate at required intervals so that the pin body can be inserted in the thickness direction of the pressing plate. And when the pin body inserted through the insertion portion is inserted into the ground, the pressing portion presses the portion to be pressed toward the ground.

[0010] The second aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is that, in the first aspect, insertion portions through which the pin body can be inserted are provided at both end portions in the longitudinal direction of the pressing plate, and a plurality of the insertion portions are provided at an intermediate portion in the longitudinal direction at a required interval in the longitudinal direction.

[0011] The third aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is that the strip-shaped sheet pressing and fixing tools according to the first aspect are configured to be mutually connectable, and the insertion portions provided at both end portions in the longitudinal direction of the pressing plate are configured as connection holes. With the pin body inserted into the communication connection holes formed by aligning the centers of the connection holes, the pressing plates can rotate around the axis of the pin body.

[0012] The fourth aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is that the strip-shaped sheet pressing and fixing tools according to the first aspect are configured to be mutually connectable, and the pressing plate has first and second connecting piece portions continuously provided at both ends of the pressing plate main body. The insertion portions configured as connection holes are provided in each of the first and second connecting piece portions. With the pin body of the pressing pin inserted into the communication connection holes formed by aligning the centers of the connection holes, the pressing plates can rotate around the axis of the pin body. The pressing plate main body has the same thickness over its entire length, and the thickness of the first and second connecting piece portions is set to 1 / 2 of the thickness of the pressing plate main body. The surface of the first connecting piece portion is continuous with the surface of the pressing plate main body via a stepped surface orthogonal to the longitudinal direction, and the back surface of the first connecting piece portion is flush with the back surface of the pressing plate main body.

[0013] The fifth aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is, in the fourth aspect, the front edges of the first and second connecting piece portions each have a semi-circular arc protruding outward, and the connecting holes provided in the first and second connecting piece portions are arranged at the center of the semi-circular arc. And on the surface of the first connecting piece portion, an annular protrusion projects at the peripheral edge of the connecting hole. In a state where the annular protrusion is fitted into the connecting hole of the second connecting piece portion, the outer peripheral surface of the annular protrusion abuts against the inner peripheral surface of the connecting hole, or an annular protrusion projects at the peripheral edge of the connecting hole on the back surface of the second connecting piece portion. In a state where the annular protrusion is fitted into the connecting hole of the first connecting piece portion, the outer peripheral surface of the annular protrusion abuts against the inner peripheral surface of the connecting hole. And in the fitted state, the annular protrusion is rotatable around the axis of the connecting hole.

[0014] The sixth aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is that the strip-shaped sheet pressing and fixing tools according to the first aspect are configured to be interconnected. The pressing plate has first and second connecting piece portions continuously provided at both ends of the pressing plate body. The pressing plate has the same thickness over its entire length, and the thickness of the first and second connecting piece portions is set to 1 / 2 of the thickness of the pressing plate body. And the surface of the first connecting piece portion is continuous with the surface of the pressing plate body through a stepped surface perpendicular to the longitudinal direction, and the back surface of the first connecting piece portion is flush with the back surface of the pressing plate body. The surface of the second connecting piece portion is flush with the surface of the pressing plate body, and the back surface of the second connecting piece portion is continuous with the back surface of the pressing plate body through a stepped surface perpendicular to the longitudinal direction. Also, in a state where the surface of the first connecting piece portion and the back surface of the second connecting piece portion are in contact, a pivot protruding from either one of the surface and the back surface is inserted into a bearing hole provided in the other surface, and a retaining locking protrusion provided at the tip of the pivot is engaged with the outer edge of the bearing hole, so that the pressing plates can rotate around the axis of the pivot without the pivot escaping from the bearing hole.

[0015] The seventh aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is that, in any of the first to sixth aspects, the insertion portion provided in the pressing plate is an insertion hole penetrating the pressing plate in its thickness direction and / or left and right notch portions provided at left and right side edge portions of the pressing plate and opening at the side edge of the pressing plate.

[0016] The eighth aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is that, in the seventh aspect, the insertion portion provided in the pressing plate is an insertion hole penetrating the pressing plate in its thickness direction and / or left and right notch portions provided in a left-right facing state at left and right side edge portions of the pressing plate and opening at the side edge of the pressing plate. The insertion hole is formed as an elliptical insertion hole having a margin expansion portion that is long in the longitudinal direction of the pressing plate and larger than the diameter of the pin body. The notch portion is formed as a U-shaped notch portion that opens at the side edge of the pressing plate with a margin expansion portion larger than the diameter of the pin body, and the front surface side and the back surface side of the bottom portion of the U of the U-shaped notch portion are configured as expansion inclined surfaces that expand in an inclined state toward the inside of the pressing plate.

[0017] The ninth aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is that, in any of the first to sixth aspects, a continuous small hole structure portion including a honeycomb structure portion in which innumerable small holes are continuously provided is provided in the pressing plate.

[0018] A tenth aspect of the strip-shaped sheet pressing and fixing tool according to the present invention is a strip-shaped sheet pressing and fixing tool that presses and fixes a sheet-like object to the ground via a pressing pin, which can be interconnected and has a pressed portion on the surface of a strip-shaped pressing plate extending in the longitudinal direction, and abuts against the sheet-like object on the back surface of the pressing plate to press and fix the sheet-like object to the ground. The pressing pin has a pressing portion at the upper end of the pin body for pressing the pressed portion. The pressing plate is provided with first and second connecting piece portions having connecting holes at both ends of the pressing plate body. The pressing plate body has the same thickness over its entire length, and the thickness of the first and second connecting piece portions is set to 1 / 2 of the thickness of the pressing plate body. The surface of the first connecting piece portion is continuous with the surface of the pressing plate body via a stepped surface perpendicular to the longitudinal direction, and the back surface of the first connecting piece portion is flush with the back surface of the pressing plate body. The surface of the second connecting piece portion is flush with the surface of the pressing plate body, and the back surface of the second connecting piece portion is continuous with the back surface of the pressing plate body via a stepped surface perpendicular to the longitudinal direction. An annular protrusion projects from the peripheral edge of the connecting hole on the surface of the first connecting piece portion, and in a state where the annular protrusion is fitted into the connecting hole of the second connecting piece portion, the outer peripheral surface of the annular protrusion abuts against the inner peripheral surface of the connecting hole, or an annular protrusion projects from the peripheral edge of the connecting hole on the back surface of the second connecting piece portion, and in a state where the annular protrusion is fitted into the connecting hole of the first connecting piece portion, the outer peripheral surface of the annular protrusion abuts against the inner peripheral surface of the connecting hole,

[0019] In this embedded state, the annular protrusion is rotatable around the axis of the connecting hole. On the pressing plate body, an insertion portion formed as an elliptical insertion hole having a margin expansion portion that is long in the longitudinal direction and larger than the diameter of the pin body is provided at a required interval in the extension direction on the center line in the longitudinal direction. U-shaped notches having margin expansion portions larger than the diameter of the pin body of the pressing pin are provided on the left and right side edge portions of the pressing plate body in a left-right facing state and opening at the side edges of the pressing plate. The front and back surfaces of the bottom portion of the U of the U-shaped notch are configured as expansion inclined surfaces that expand in an inclined state toward the inside of the pressing plate. The peripheral edge portion, the elliptical insertion hole, and the U-shaped notch of the pressing plate body are each bordered by a bordering portion having a thickness extending across the front and back of the pressing plate body, and a center line reinforcing portion having a thickness extending across the front and back of the pressing plate body is provided along the center line in the longitudinal direction of the pressing plate body. The center line reinforcing portion is composed of a connecting reinforcing portion that connects the long axis ends of the elliptical bordering portions of adjacent elliptical insertion holes and an end reinforcing portion that connects the elliptical bordering portion located at the end and the end of the pressing plate body. And on both sides of the center line reinforcing portion, a continuous small hole structure portion including a honeycomb structure portion is provided in a portion surrounded by the center line reinforcing portion, the peripheral edge portion, the elliptical bordering portion, and the bordering portion of the U-shaped notch.

Advantages of the Invention

[0020] According to the strip-shaped sheet pressing and fixing tool of the present invention, a sheet such as a weed control sheet can be directly pressed against the ground, and the sheet can be pressed and fixed to the ground in a stable state.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

Examples

[0022] In FIGS. 1 to 6, a strip-shaped sheet pressing and fixing tool (hereinafter also referred to as a pressing and fixing tool) 1 according to the present invention is mutually connectable. As shown in FIGS. 5 to 6, it has a pressed portion 5 on the surface 3 of a pressing plate 2 extending in the longitudinal direction F (FIG. 1), and can abut on a sheet-like object 7 on the back surface 6 of the pressing plate 2. The sheet-like object 7 is pressed and fixed to the ground 10 via a pressing pin 9. Here, the surface is the upper surface, and the back surface is the lower surface facing the ground 10. The pressing pin 9 has a pressing portion 13 for pressing the pressed portion 5 at the upper end 12 of a pin body 11. At least four insertion portions 15 through which the pin body 11 can be inserted in the thickness direction of the pressing plate 2 are provided at required intervals in the longitudinal direction of the pressing plate 2. By inserting the pin body 11 inserted through the insertion portion 15 into the ground 10, the pressing portion 13 presses the pressed portion 5 toward the ground 10. Hereinafter, this will be specifically described.

[0023] As shown in FIGS. 1 to 4 and 7, the pressing plate 2 is formed by continuously connecting first and second connecting piece portions 19, 20 provided with connecting holes (one of the insertion portions 15) 17 at both ends of a pressing plate main body 16, and presents a strip shape. In this embodiment, the whole is integrally formed of a flexible resin (for example, polyethylene). The pressing plate main body 16 has the same thickness over its entire length, and the thicknesses of the first and second connecting piece portions 19, 20 are set to 1 / 2 of the thickness of the pressing plate main body 16.

[0024] The surface 21 of the first connecting piece portion 19 is continuous with the surface 22 of the pressing plate main body 16 via a stepped surface 26 (having a step corresponding to 1 / 2 of the thickness of the pressing plate main body) orthogonal to the longitudinal direction F, and the back surface 23 of the first connecting piece portion 19 is flush with the back surface 25 of the pressing plate main body 16.

[0025] Also, the surface 27 of the second connecting piece portion 20 is flush with the surface 22 of the pressing plate main body 16, and the back surface 30 of the second connecting piece portion 20 is continuous with the back surface 25 of the pressing plate main body 16 via a stepped surface 29 (having a step corresponding to 1 / 2 of the thickness of the pressing plate main body 16) orthogonal to the longitudinal direction F.

[0026] The leading edges of the first and second connecting piece portions 19 and 20 are in a semi-circular arc shape as shown in FIGS. 1 to 3. As shown in FIG. 3, linear edges 33, 33 extending in the longitudinal direction F are continuously provided at both ends 32, 32 of the semi-circular arc-shaped edge 31. And the center 35 of the connecting hole 17 substantially coincides with the center of the semi-circular arc-shaped edge 31.

[0027] On the surface 21 of the first connecting piece portion 19, as shown in FIGS. 1, 4, and 7, an annular protrusion 37 projects at the peripheral edge of the connecting hole 17 (referred to as connecting hole 17a). In a state where the annular protrusion 37 is fitted into the connecting hole 17 (referred to as connecting hole 17b) of the second connecting piece portion 20, as shown in FIG. 7(C), the outer peripheral surface 39 of the annular protrusion 37 abuts against the inner peripheral surface 40 of the connecting hole 17b, and in this fitted state, the annular protrusion 37 can rotate around the axis of the connecting hole 17b (can rotate in the forward and reverse directions around the axis). Thus, when the pin body 11 is inserted into the communication connecting hole 41 as shown in FIG. 7(A), the pressing plates 2, 2 can rotate around the axis of the pin body 11 (FIG. 7(A)).

[0028] In this embodiment, as described above, the leading edges of the first and second connecting piece portions 19 and 20 are in a semi-circular arc shape, and the linear edges 33, 33 are continuously provided on the semi-circular arc-shaped edge 31 (FIG. 3), and since the step surfaces 26, 29 are provided (FIG. 4, etc.), the rotation in the forward and reverse directions is performed within a rotation range (an angular range of 180 degrees) where the linear edges 33, 33 abut against the step surfaces 26, 29.

[0029] On the pressing plate body 16, as shown in FIGS. 1 to 3, an insertion portion 15 is provided as an elliptical insertion hole 45 (configured as insertion hole 44) having a margin extension portion that is long in the longitudinal direction F and larger than the diameter of the pin body 11 at a required interval in the extension direction on the center line 42 (FIG. 3) of the longitudinal direction F. In this embodiment, the insertion portion 15 as the elliptical insertion hole 45 is arranged such that the center-to-center distance between adjacent elliptical insertion holes 45, 45 is about 50 mm, and the distance between the centers of the elliptical insertion holes 45a, 45a arranged at the ends and the step surfaces 26, 29 is about 32 mm.

[0030] Also, U-shaped cutout portions 49, 49 serving as the insertion portions 44 are provided in a left-right facing state at the left and right opposing side edge portions 46, 46 of the presser plate body 16, and have margin expansion portions larger than the diameters of the pin bodies 11, 11 of the presser pins 9. The front surface side and the back surface side of the bottom portion 50 of the U shape of the U-shaped cutout portions 49, 49 are configured as expansion inclined surfaces 53 that expand in an inclined state toward the inside of the presser plate 2 (FIGS. 3 and 6). In this embodiment, as shown in FIG. 2, a set 55 of a pair of the U-shaped cutout portions 49, 49 facing each other left and right is provided at the center between the adjacent elliptical insertion holes 45, 45 (FIG. 2), and is provided at the end portion 56 (FIG. 2) of the presser plate body 16.

[0031] Also, as shown in FIG. 2, the presser plate body 16 has its peripheral edge portion (interrupted by the U-shaped cutout portion 49) 57 (FIG. 3), the elliptical insertion hole 45, and the U-shaped cutout portion 49 each bordered by a bordering portion 59 having a thickness extending across the front and back of the presser plate body 16. Along the center line 42 (FIG. 3) in the longitudinal direction of the presser plate body 16, a center line reinforcing portion 60 having a thickness extending across the front and back of the presser plate body 16 is provided. As shown in FIG. 3, the center line reinforcing portion 60 includes a connecting reinforcing portion 63 that connects the long axis end portions 62, 62 of the elliptical bordering portions 61 of the adjacent elliptical insertion holes 45, 45, and an end portion reinforcing portion 66 that connects the elliptical bordering portion 61a located at the end and the end portion 65 of the presser plate body 16. And a continuous small hole structure portion 69 is provided in a portion surrounded by the center line reinforcing portion 60, the peripheral edge portion 57 (the bordering portion 59), the elliptical bordering portion 61, and the bordering portion 67 (the bordering portion 59) of the U-shaped cutout portion 49. The continuous small hole structure portion 69 is configured as a honeycomb structure portion 69a in this embodiment. These bordering portions and the center line reinforcing portion 60, together with the honeycomb structure portion 69a, contribute to improving the strength of the presser plate body 16. In particular, the elliptical bordering portion 61 and the bordering portion 67 of the U-shaped cutout portion 49 contribute to improving the strength of the portion to be pressed 5.

[0032] If the dimensions of the main parts of the pressing plate 2 are further exemplified, in FIG. 2, the overall length of the pressing plate 2 is set to about 430 mm. Also, the distance between the centers of the connecting holes 17, 17 at both ends is, for example, about 400 mm, its thickness is about 4 mm, the protruding lengths of the first and second connecting piece parts 19, 20 are about 35 mm, and its thickness is about 2 mm, respectively. Further, the outer diameter of the annular protrusion 37 is about 9 mm, its protruding amount is about 2 mm, the inner diameter of the annular protrusion 37 (the diameter of one connecting hole 17a (FIG. 1)) is about 7 mm, the diameter of the other connecting hole 17b (FIG. 1) is about 9 mm, the length of the major axis of the elliptical insertion hole 45 is about 8 mm and the length of its minor axis is about 7 mm, the width of the U-shaped notch 49 is about 5 mm and its depth is about 6 mm, the width of the elliptical border part 61 is about 3 mm, the width of the border part 67 of the U-shaped notch is about 3.5 mm on average, and the width of the center line reinforcement part 60 is about 3 mm, respectively.

[0033] As described above, the pressing pin 9 has the pressing part 13 that presses the pressed part 5 at the upper end of the pin body 11. However, there are two types of the pressing pin 9: a nail type and a U-shaped type.

[0034] The nail-type pressing pin 9a, for example, as shown in FIG. 8, has a circular plate-shaped pressing part 13 with a diameter of 10 - 12 mm provided at the upper end of a pin body 11 with a diameter of 5 mm and a length of 150 - 200 mm whose tip part is tapered, presenting a nail shape. The nail-type pressing pin 9a also includes those in which the upper end of the pin body 11 is bent into an L shape as shown in FIG. 9, and the bent part serves as the pressing part 13.

[0035] Also, the U-shaped type pressing pin 9b, as shown in FIG. 10, has a pair of left and right pin bodies 11, 11 with a diameter of 3.2 mm and a length of 200 mm whose tip parts are tapered, and the upper ends thereof are connected by a horizontal connecting piece 70 (the pressing part 13) with a length of 30 mm, presenting a U shape as a whole.

[0036] Hereinafter, a usage mode of the pressing fixture 1 having such a configuration will be described by taking as an example the case where the edge portion of the weed control sheet 7a laid on the ground is continuously pressed and fixed to the ground in its extending direction.

[0037] FIG. 7(A) and FIG. 11 show a state in which the pressing fixture 1 in an interconnected state by fitting the annular protrusion 37 into the connection hole 17b is placed on the upper surface 72 of the linear edge portion 71 of the weed control sheet 7a. In this state, as shown in FIG. 7(A), the pin body 11 of the nail-type pressing pin 9a is inserted into the communication connection hole 41 (FIG. 7(C)). Then, the pressing portion 13 at the upper end of the pin body 11 is pressed downward with a hammer to drive the pin body 11 into the ground, and the pressing portion 13 is brought into a pressed state against the pressed portion (the surface of the first connecting piece portion 19) 5 on the surface of the pressing plate 2.

[0038] Also, the pin body 11 of the nail-type pressing pin 9a is inserted into a required one of the elliptical insertion holes 45 arranged in parallel with the pressing plate main body 16, for example, the elliptical insertion hole 45a (FIG. 5) arranged at the center. Then, the pressing portion 13 at the upper end of the pin body 11 is pressed downward with a hammer to drive the pin body 11 into the ground 10, and the pressing portion 13 is brought into a pressed state against the pressed portion (the surface of the elliptical edge portion 61 (FIG. 3) of the elliptical insertion hole 45) 5 on the surface of the pressing plate 2. As a result, as shown in FIG. 11, the linear edge portion 71 of the weed control sheet 7a is pressed and fixed to the ground 10.

[0039] In this way, the pin body is driven in. At the end of the driving, the pressed portion 5 is strongly pressed by the pressing portion 13. As a result, there is a risk of cracks occurring in the pressed portion 5 of the presser plate body 16 and its peripheral portion due to the pressing impact. However, in the pressing fixture 1 according to the present embodiment, as described above, since the honeycomb structure portions 69a are provided on both sides of the center line reinforcing portion 60 (Figs. 2 to 3), the cracks generated in the pressed portion 5 and the honeycomb structure portion 69a around it due to the pressing impact can be stopped at some side portion of the honeycomb structure portion 69a, preventing further crack propagation. Therefore, the cracking damage of the presser plate body 16 due to the pressing impact can be suppressed within a certain range.

[0040] Fig. 12 shows a case where the weed control sheet 7a is laid on the ground 10 at a location where there are obstacles such as a part where a utility pole is erected, a part where there are rocks, a part where a building protrudes, etc., or at the right-angle bent edge portion of the weed control sheet. In this case, the bent edge portion 71 of the weed control sheet 7a is pressed and fixed to the ground by the pressing fixture 1.

[0041] The state shown by the solid line in Fig. 12 is an example of a state in which the interconnected pressing fixture 1 is set to a required bent state by rotation around the axis of the connecting hole 17 and placed on the upper surface 72 of the bent edge portion 71 of the weed control sheet 7a. The interconnected pressing fixture 1 is bent at 90 degrees. Also, the interconnected state shown by the dashed-dotted line in Fig. 12 shows a state in which the pressing fixture 1 in an interconnected state bent at an angle other than a right angle (for example, an inner angle of 120 degrees) is placed on the upper surface 72 of the bent edge portion 71 of the weed control sheet.

[0042] In this way, the pressing fixture 1 is placed on the upper surface 72 of the edge portion 71 of the weed control sheet 7a, and the edge portion 71 is fixed to the ground 10 via the pressing pin 9. When fixing in this way, even if there are irregularities on the ground 10, the pressing plate 2 can be elastically bent and deformed appropriately to easily follow the irregularities. Particularly in this embodiment, as shown in FIGS. 1 to 2, since the U-shaped notches 49, 49 are provided in the left and right opposing side edge portions 46, 46 of the pressing plate main body 16 in a left-right opposing state, the bending deformation of the pressing plate main body 16 can be performed more easily. On the other hand, since a center line reinforcing portion 60 having a thickness extending across the front and back of the pressing plate main body 16 is provided along the center line 42 (FIG. 3) in the longitudinal direction F of the pressing plate main body 16, the center line reinforcing portion 60 exhibits a certain reinforcing effect against the bending deformation.

[0043] Since the center line reinforcing portion 60 is provided along the center line 42 in the longitudinal direction F in this way, it also contributes to alleviating the impact of the strike. Also, when a crack occurs on one side (either the left or right side when viewed from the left and right) of the center line reinforcing portion 60, it also contributes to preventing the crack from propagating to the other side.

[0044] By the way, the fixing of the weed control sheet 7a to the ground 10 by the nail-type pressing pin 9a is, as shown in FIG. 5, inserting the pin body 11 into the elliptical insertion hole 45 as described above, and then pressing the pressing portion 13 of the pin body 11 downward with a hammer to drive the pin body 11 into the ground 10, and pressing the pressed portion 5 of the pressing plate main body 16 with the pressing portion 13, thereby fixing the weed control sheet 7a in a state of being pressed against the ground 10.

[0045] However, when driving the pin body 11, the lower end of the pin body 11 may hit an obstacle such as a stone in the soil, and the pin body 11 may not be driven in any further.

[0046] When such a situation occurs, the pin body 11 is first pulled out, and another elliptical insertion hole (for example, the one indicated by reference numeral 45B in FIG. 2) that is separated from the elliptical insertion hole (for example, the one indicated by reference numeral 45A in FIG. 2) is selected, and the pin body 11 is pressed in the same manner as described above. As a result, it becomes easier to normally drive the pin body 11 into the ground 10.

[0047] In this embodiment, the insertion portion 15 disposed on the center line 42 (FIG. 3) in the longitudinal direction F of the presser plate body 16 is formed as the elliptical insertion hole 45 having a longitudinally long and enlarged margin portion larger than the diameter of the pin body 11 of the presser pin 9. Therefore, when the lower end of the pin body 11 hits an obstacle such as a stone in the soil, within the margin range of the enlarged margin portion, as shown by the dashed-dotted line in FIG. 5, the pin body 11 may be in a tilted state as required and can be directly driven into the ground 10 as it is.

[0048] If the pin body 11 is forcibly driven in without having the enlarged margin portion, the pin body 11 may tilt and be forcibly driven into the ground 10. As a result, the presser plate 2 may be torsionally deformed, and there is a risk that the pressing and fixing of the edge portion 71 cannot be reliably performed. Also, the presser plate 2 may deteriorate due to such torsional deformation.

[0049] FIG. 6 shows another aspect of pressing and fixing the sheet-like object 7 to the ground via the pressing fixture 1. In this aspect, instead of inserting the nail-type presser pin 9a into the elliptical insertion hole 45, the U-shaped presser pin 9b of the U-shaped type is used. In this case, the left and right pin bodies 11, 11 are inserted into the U-shaped notches 49, 49 provided in a left-right facing state on the left and right opposing side edge portions of the presser plate body 16, and the horizontal connecting piece 70 (the pressing portion 13) is pressed downward with a hammer to drive the left and right pin bodies 11, 11 into the ground 10 on the edge portion 71.

[0050] Also in this case, when driving the pin body 11, there may be a situation where the lower end of the pin body 11 hits a stone in the soil and the pin body 11 cannot be driven further. In that case, the left and right pin bodies 11, 11 are once pulled out, another U-shaped notch separated from the U-shaped notches 49, 49 is selected, and the horizontal connecting piece 70 (the pressing part 13) is pressed in the same manner as above. As a result, it becomes easier to drive the left and right pin bodies 11, 11 into the ground 10 normally.

[0051] In this embodiment, the U-shaped notches 49, 49 are configured to have a margin expansion part larger than the diameter of the pin body 11 of the pressing pin 9, and the front and back surfaces of the bottom part 50 of the U of the U-shaped notches 49, 49 are configured as the expansion inclined surfaces 53, 53 (FIGS. 3 and 6) that expand in an inclined state toward the inside of the pressing plate 2. Therefore, when the lower end of the pin body 11 hits a stone in the soil, within the margin range of the margin expansion part and by utilizing the inclination of the expansion inclined surface 53, if the U-shaped pressing pin 9b of the U-shaped type is inclined as required, there may be a case where the pin body 11 can be driven into the ground as it is.

[0052] If the pin bodies 11, 11 are forcibly driven in without having the margin expansion part, the pin bodies 11, 11 may tilt and be forcibly driven into the ground 10. As a result, there is a risk of twisting and deforming the pressing plate 2, and there is a risk of being unable to securely press and fix the edge part 71. Also, due to such twisting deformation, the pressing plate 2 may deteriorate.

[0053] In the above, the pin body 11 of the nail-shaped pressing pin 9a is inserted into the communication connecting hole 41 (FIGS. 7(A)(C)), but there may also be a situation where the lower end of the pin body 11 hits an obstacle such as a stone in the soil and cannot be driven further. In this case, the pin body 11 is pulled out. In this state, although the pin body 11 is not driven into the communication connecting hole 41, if the pin body 11 is driven into the elliptical insertion hole 45 or the U-shaped notch 49, the pressing and fixing state of the sheet-like object 7 by the pressing fixture 1 can be obtained.

[0054] The pin body 11 of the nail-shaped presser pin 9a is inserted through the communication connection hole 41. However, instead of the nail-shaped presser pin 9a, the pin body 11 of the U-shaped presser pin 9b can also be driven into the communication connection hole 41.

Example

[0055] The present invention is by no means limited to that shown in the above embodiment, and it goes without saying that various design changes can be made within the scope of the claims. An example is as follows.

[0056] (1) In the above embodiment, an annular protrusion 37 projects from the surface 21 of the first connecting piece portion 19 at the peripheral edge of the connecting hole 17a. In a state where the annular protrusion 37 is fitted into the connecting hole 17b of the second connecting piece portion 20, the outer peripheral surface 39 of the annular protrusion 37 abuts against the inner peripheral surface 40 of the connecting hole 17b. In this fitted state, the annular protrusion 37 is configured to be rotatable around the axis of the connecting hole 17b. Conversely, an annular protrusion 37 may project from the back surface 30 of the second connecting piece portion 20 at the peripheral edge of the connecting hole 17b. In a state where the annular protrusion 37 is fitted into the connecting hole 17a of the first connecting piece portion 19, the outer peripheral surface 39 of the annular protrusion 37 abuts against the inner peripheral surface of the connecting hole 17a. In this fitted state, the annular protrusion 37 may be configured to be rotatable around the axis of the connecting hole 17a.

[0057] (2) The annular protrusion 37 may be omitted.

[0058] (3) When the annular protrusion (one of the pivot shafts described later) 37 projects at the peripheral edge of the connecting hole 17a or the connecting hole 17b, a retaining engagement protrusion such as a claw shape is provided at the tip of the annular protrusion 37. In a state where the annular protrusion 37 is inserted into the connecting hole 17b of the second connecting piece portion 20, or in a state where the annular protrusion 37 is inserted into the connecting hole 17a of the first connecting piece portion 19, the retaining engagement protrusion may be configured to engage with the outer edge of the connecting hole. Thereby, relative rotation can be obtained while preventing the annular protrusion from falling off.

[0059] (4) When the first and second connecting piece portions 19 and 20 are continuously provided at both ends of the pressing plate body 16, a pivot shaft projecting from either the front surface 21 or the back surface 30 where the first and second connecting piece portions 19 and 20 abut is inserted into a bearing hole provided on the other surface, and the pressing plates 2, 2 may be configured to be relatively rotatable around the axis of the pivot shaft. The pivot shaft may be a hollow shaft or a solid shaft. In this case, by engaging a retaining locking protrusion such as a claw shape provided at the tip of the pivot shaft with the outer edge of the bearing hole, it is also possible to prevent the pivot shaft from escaping from the bearing hole.

[0060] (5) As shown in FIG. 1, for example, at least four insertion portions 15 through which the pin body 11 can be inserted in the thickness direction of the pressing plate 2 are provided at required intervals in the longitudinal direction of the pressing plate 2. The insertion portion 15 may be composed only of an insertion hole such as the elliptical insertion hole 45 penetrating the pressing plate 2, or may be composed only of the U-shaped notches 49, 49 provided in a left-right facing state at the left and right opposing side edge portions 46, 46 (FIG. 3) of the pressing plate 2. Alternatively, it may be configured as a combination of the insertion hole and the U-shaped notch. Thereby, even if the holding press pin is the nail-type press pin 9a or the U-shaped press pin 9b, such a press pin can be used to fix the sheet-like object 7 to the ground 10 in a pressed state via the pressing fixture 1.

[0061] (6) The elliptical insertion hole 45 may be configured as an insertion hole without the margin expansion portion. In addition, the U-shaped notch 49 may also be configured as a notch without the margin expansion portion and the expansion inclined surface 53. Further, the elliptical insertion hole 45 and the U-shaped notch 49 may not be bordered by the bordering portion 59.

[0062] (7) As long as the notch as the insertion portion can allow the pin body to be inserted, in addition to the U-shaped notch, it may be a notch having a semicircular shape, a square shape, a trapezoidal shape, a triangular shape, or the like.

[0063] (8) The pressing fixture 1 having the above-described configuration according to the present invention may be used without being interconnected. Further, the pressing fixture 1 may be configured not to be interconnected (those without the connecting hole 17 or those without the pivot).

[0064] (9) The insertion portions 15 provided at required intervals in the longitudinal direction of the pressing plate 2 are set to at least four in order to enable selection of another insertion portion when the lower end of the pin body 11 hits a stone in the soil and cannot be driven further. The number thereof is set to a required number of four or more according to the length of the pressing plate.

[0065] (10) If at least four insertion portions 15 that allow the pin body 11 to be inserted in the thickness direction of the pressing plate 2 are provided at required intervals in the longitudinal direction of the pressing plate 2, it is not necessary for the first and second connecting piece portions 19, 20 to be continuously provided at both ends of the pressing plate main body 16. Further, even when the first and second connecting piece portions 19, 20 are continuously provided, they may not have the stepped surfaces 26, 29. Further, if the pressing plate 2 has a strip shape, the cross-sectional shape thereof is not limited. For example, it may have a cross-sectional shape of a wasabi mold in which the surface 3 has a convex arc shape and the back surface 6 is a flat surface.

[0066] (11) When the insertion part 15 is configured as an insertion hole 44 that penetrates in the thickness direction of the pressing plate 2, the insertion hole 44 is not necessarily provided on the center line in the longitudinal direction of the pressing plate 2. Further, the U-shaped notch 49 is not necessarily provided at the center between adjacent insertion holes 44, 44.

[0067] (12) The continuous small hole structure part 69 including the honeycomb structure part may be configured as a continuous small hole structure part composed of circular holes, angular holes such as triangular holes and square holes, or combinations thereof. As described above, such a continuous small hole structure part 69 can suppress the cracking damage of the pressing plate body 16 due to the pressing impact within a certain range. In addition, by providing the continuous small hole structure part 69, good heat dissipation in the continuous small hole structure part 69 under hot sun or the like can prevent the deterioration of the sheet-like material such as the weed control sheet due to the heat storage of the pressing fixture 1. Also, since a large number of small holes are provided, it is possible to save the resin material for manufacturing the pressing fixture.

[0068] (13) The continuous small hole structure part 69 may not be provided.

[0069] (14) The edges on the front side of each of the first and second connecting piece parts 19, 20 do not necessarily have to be configured to have a semi-circular arc protruding outward as shown in the embodiment, and may be in a rectangular shape with rounded corners or the like.

[0070] (15) In the present invention, the sheet-like material 7 is not limited to the weed control sheet, and may be a cover sheet composed of a mulch or a blue sheet for covering materials. And the pressing and fixing of the sheet-like material 7 by the pressing fixture 1 is not limited to the pressing and fixing at the edge portion of the sheet-like material 7, and may be the pressing and fixing at any portion on the surface of the sheet-like material 7. Also, it is not necessary to perform the pressing and fixing by sequentially connecting the pressing fixtures 1.

[0071] (16) The overall length of the pressing fixture 1 according to the present invention (the overall length of the pressing plate) is set to about 430 mm in the above embodiment, but it may be configured to be longer, such as about 500 to 1000 mm, depending on its use.

Explanation of Signs

[0072] 1 Strip-shaped sheet pressing fixture 2 Pressing plate 3 Surface 5 Pressed portion 6 Back surface 7 Sheet-like object 9 Pressing pin 10 Ground 11 Pin body 13 Pressing portion 15 Insertion portion 16 Pressing plate body 17 Connecting hole 19 First connecting piece portion 20 Second connecting piece portion 26 Step surface 29 Step surface 37 Annular protrusion 39 Outer peripheral surface 40 Inner peripheral surface 41 Communicating connecting hole 45 Elliptical insertion hole 49 U-shaped notch 53 Expansion inclined surface 59 Edge portion 60 Center line reinforcement portion 69 Continuous small hole structure portion 69a Honeycomb structure portion

Claims

1. A strip-shaped sheet pressing and fixing tool for pressing and fixing a sheet-like object to the ground via a pressing pin, which has a pressed portion on the surface of a strip-shaped pressing plate extending in the longitudinal direction, and abuts against the sheet-like object on the back surface of the pressing plate to press and fix the sheet-like object to the ground, wherein the pressing pin has a pressing portion for pressing the pressed portion at the upper end of the pin body, the pressing plate is provided with at least four insertion portions at required intervals in the longitudinal direction thereof, through which the pin body can be inserted in the thickness direction of the pressing plate, and the pressing portion presses the pressed portion toward the ground when the pin body inserted through the insertion portion is inserted into the ground. The strip-shaped sheet pressing and fixing tool is characterized by this.

2. The strip-shaped sheet pressing and fixing tool according to claim 1, wherein the insertion portions through which the pin body can be inserted are provided at both longitudinal ends of the pressing plate, and a plurality of the insertion portions are provided at required intervals in the longitudinal direction at the middle portion in the longitudinal direction.

3. The strip-shaped sheet pressing and fixing tools according to claim 1 are configured to be interconnected. The insertion portions provided at both longitudinal ends of the pressing plate are configured as connection holes, and the pressing plates can be rotated around the axis of the pin body with the pin body inserted through the communication connection holes formed by aligning the centers of the connection holes. The strip-shaped sheet pressing and fixing tool is characterized by this.

4. The strip-shaped sheet pressing and fixing tools according to claim 1 are configured to be interconnected. The pressing plate has first and second connecting piece portions continuously provided at both ends of the pressing plate body. The insertion portions configured as connection holes are provided in each of the first and second connecting piece portions. With the pin body of the pressing pin inserted through the communication connection holes formed by aligning the centers of the connection holes, the pressing plates can be rotated around the axis of the pin body, the pressing plate body has the same thickness over its entire length, and the thicknesses of the first and second connecting piece portions are set to 1 / 2 of the thickness of the pressing plate body, the surface of the first connecting piece portion is continuous with the surface of the pressing plate body via a step surface orthogonal to the longitudinal direction, and the back surface of the first connecting piece portion is flush with the back surface of the pressing plate body. The surface of the second connecting piece part is flush with the surface of the pressing plate body, and the back surface of the second connecting piece part is continuous with the back surface of the pressing plate body via a step surface perpendicular to the longitudinal direction, which is a strip-shaped sheet pressing and fixing tool.

5. The front edges of the first and second connecting piece parts each present a semi-circular arc protruding outward, and the connecting holes provided in the first and second connecting piece parts are arranged at the center of the semi-circular arc. An annular protrusion protrudes from the peripheral edge of the connecting hole on the surface of the first connecting piece part. In a state where the annular protrusion is inserted into the connecting hole of the second connecting piece part, the outer peripheral surface of the annular protrusion abuts against the inner peripheral surface of the connecting hole. Alternatively, an annular protrusion protrudes from the peripheral edge of the connecting hole on the back surface of the second connecting piece part. In a state where the annular protrusion is inserted into the connecting hole of the first connecting piece part, the outer peripheral surface of the annular protrusion abuts against the inner peripheral surface of the connecting hole. The strip-shaped sheet pressing and fixing tool according to claim 4, characterized in that in the inserted state, the annular protrusion is rotatable around the axis of the connecting hole.

6. The strip-shaped sheet pressing tools according to claim 1 are configured to be interconnected. The pressing plate has first and second connecting piece parts continuously provided at both ends of the pressing plate body. The pressing plate has the same thickness over its entire length, and the thicknesses of the first and second connecting piece parts are set to 1 / 2 of the thickness of the pressing plate body. The surface of the first connecting piece part is continuous with the surface of the pressing plate body via a step surface perpendicular to the longitudinal direction, and the back surface of the first connecting piece part is flush with the back surface of the pressing plate body. The surface of the second connecting piece part is flush with the surface of the pressing plate body, and the back surface of the second connecting piece part is continuous with the back surface of the pressing plate body via a step surface perpendicular to the longitudinal direction. In a state where the surface of the first connecting piece part and the back surface of the second connecting piece part are in contact, a pivot protruding from either one of the surface and the back surface is inserted into a bearing hole provided on the other surface, and a retaining locking protrusion provided at the tip of the pivot is engaged with the outer edge of the bearing hole, so that the pressing plates can rotate around the axis of the pivot without the pivot escaping from the bearing hole, which is a strip-shaped sheet pressing and fixing tool.

7. The insertion part provided in the pressing plate is an insertion hole penetrating the pressing plate in its thickness direction and / or left and right notch parts provided at the left and right side edge parts of the pressing plate and opening at the side edge of the pressing plate. The strip-shaped sheet pressing fixture according to any one of claims 1 to 6, characterized in that.

8. The insertion part provided in the pressing plate is an insertion hole penetrating the pressing plate in its thickness direction and / or left and right notch parts provided in a left-right facing state at the left and right side edge parts of the pressing plate and opening at the side edge of the pressing plate. The insertion hole is formed as an elliptical insertion hole having a margin expansion part that is long in the longitudinal direction of the pressing plate and larger than the diameter of the pin body. The notch part is formed as a U-shaped notch part that opens at the side edge of the pressing plate as a margin expansion part larger than the diameter of the pin body. The front surface side and the back surface side of the bottom part of the U of the U-shaped notch part are configured as expansion inclined surfaces that expand in an inclined state toward the inside of the pressing plate. The strip-shaped sheet pressing fixture capable of being interconnected according to claim 7, characterized in that.

9. The pressing plate is provided with a continuous small hole structure part including a honeycomb structure part in which innumerable small holes are continuously provided. The strip-shaped sheet pressing fixture according to any one of claims 1 to 6, characterized in that.

10. A strip-shaped sheet pressing fixture that presses and fixes a sheet-like object to the ground via a pressing pin, and is capable of being interconnected. It has a pressed part on the surface of a strip-shaped pressing plate that extends in the longitudinal direction, and abuts on the sheet-like object on the back surface of the pressing plate to press and fix the sheet-like object to the ground. The pressing pin has a pressing part at the upper end of the pin body that presses the pressed part. Both ends of the pressing plate body are continuously provided with first and second connecting piece parts provided with connecting holes. The pressing plate body has the same thickness over its entire length, and the thickness of the first and second connecting piece parts is set to 1 / 2 of the thickness of the pressing plate body. The front surface of the first connecting piece part is continuous with the front surface of the pressing plate body via a step surface orthogonal to the longitudinal direction, and the back surface of the first connecting piece part is flush with the back surface of the pressing plate body. The front surface of the second connecting piece part is flush with the front surface of the pressing plate body, and the back surface of the second connecting piece part is continuous with the back surface of the pressing plate body via a step surface orthogonal to the longitudinal direction. An annular protrusion projects from the surface of the first connecting piece portion at the peripheral edge of the connecting hole. In a state where the annular protrusion is fitted into the connecting hole of the second connecting piece portion, the outer peripheral surface of the annular protrusion abuts against the inner peripheral surface of the connecting hole. Alternatively, an annular protrusion projects from the back surface of the second connecting piece portion at the peripheral edge of the connecting hole. In a state where the annular protrusion is fitted into the connecting hole of the first connecting piece portion, the outer peripheral surface of the annular protrusion abuts against the inner peripheral surface of the connecting hole. In the fitted state, the annular protrusion is rotatable about the axis of the connecting hole. The presser plate body is provided with the insertion portion formed as an elliptical insertion hole having a margin expansion portion that is long in the longitudinal direction, has a required interval in the extension direction on the center line in the longitudinal direction, and is larger than the diameter of the pin body. U-shaped notches are provided in a left-right facing state at the left and right side edge portions of the presser plate body and open at the side edges of the presser plate. The U-shaped notches have a margin expansion portion larger than the diameter of the pin body of the presser pin. The front and back surfaces of the bottom portion of the U-shaped notch of the U-shaped notch are configured as expansion inclined surfaces that expand in an inclined state toward the inside of the presser plate. The peripheral edge portion, the elliptical insertion hole, and the U-shaped notch of the presser plate body are respectively bordered by bordering portions having a thickness extending across the front and back of the presser plate body. Along the center line in the longitudinal direction of the presser plate body, a center line reinforcing portion having a thickness extending across the front and back of the presser plate body is provided. The center line reinforcing portion is composed of a connecting reinforcing portion that connects the major axis ends of the elliptical bordering portions of adjacent elliptical insertion holes and an end reinforcing portion that connects the elliptical bordering portion located at the end and the end of the presser plate body. A continuous small hole structure portion including a honeycomb structure portion is provided in a portion surrounded by the center line reinforcing portion, the peripheral edge portion, the elliptical bordering portion, and the bordering portion of the U-shaped notch on both sides of the center line reinforcing portion. A strip-shaped sheet pressing and fixing tool is characterized in that.

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