JP4171005B2 - Tree root covering device - Google Patents

Description

  The present invention relates to a tree root covering device disposed at the root of a tree such as a roadside tree.

  A root covering device is disposed at the root of a tree planted on a paved sidewalk such as an urban area in order to protect the root of the tree from treading by a person or a vehicle.

  Such a root covering device is generally made of a casting having a large number of punched holes penetrating in the vertical direction, and is divided in the circumferential direction so as to mutually surround the tree roots. It can be connected and integrated.

  Therefore, such a casting base covering device has a considerable weight, so that it is not easy to handle during transportation and construction, and it is a cast product, so that it has a problem of lack of design.

On the other hand, as a tree root covering device, a metal frame formed by connecting an inner peripheral frame and an outer peripheral frame by a connecting frame and a plurality of hard wood plates, the hard wood plates are closely attached to the metal frame without gaps. A fixed frame (see Patent Document 1), a frame made of cast or the like having openings partitioned by ribs, a cover plate made of cast or synthetic resin, etc. fixed over the openings, and the frame And an elastically deformable fixture that engages the cover plate with each other, and the cover plate is detachable from the frame body via the fixture (see Patent Document 2). . The former can disassemble and transport the metal frame and hard wood board, so it is easy to carry into the construction site and handle at the time of construction. Compared to, it has excellent design properties. The latter can be reduced in weight by making the cover plate fixed over the opening of the frame body such as casting made of synthetic resin, and the frame body and cover plate can be disassembled and transported in the same manner as described above. In addition, it is easy to handle at the time of installation and construction, and the design can be improved by the combined arrangement of the cover plates on which the surface pattern is formed.
Japanese Patent No. 2684007 Japanese Patent No. 3012468

  However, in the case where the above-mentioned hard wood plate is fixed on a metal frame, an insertion hole having a counterbore is formed on the surface side of the hard wood plate, and the hard wood is formed by a screw inserted from above into the insertion hole. The plate is fixed to the metal frame, and after the fixing, a buried tree is fitted into the counterbore to close the counterbore. For this reason, it takes time and effort to form the insertion hole with the counterbore hole and to insert the buried tree into the counterbore hole, and the counterbore hole in which the embedded lumber is inserted is exposed on the surface of the hard wood plate. Despite the use of a wood board with excellent design, there was a problem that its aesthetics were impaired. On the other hand, in the case where the cover plate is put on the opening of the frame body so as to be detachably fixed, the frame body and the cover plate are engaged with each other in order to make the cover plate detachable from the frame body. Therefore, there is a problem in that the engaging and fixing operation through the fixing tool is troublesome, the number of parts is increased, and the cost is increased.

  It is an object of the present invention to provide a tree root covering device that can eliminate such conventional problems.

  The present invention relates to a metal divided seat plate that is divided in the circumferential direction and connected and integrated with each other in a state of surrounding a tree root, and a lightweight makeup that is attached to the upper part of each metal divided seat plate A tree base covering device comprising a panel, and a plurality of long hole-like locks capable of locking the heads of fixing screws inserted from below into the metal divided seat plate with opposing lip edges While providing an opening, a screw hole is provided on the back surface of the lightweight decorative panel at a position corresponding to the long hole-shaped locking opening, and is inserted from below the long hole-shaped locking opening and is screwed into the screw hole. A tree root covering device characterized in that a lightweight decorative panel is fixed to a metal divided seat plate by a plurality of fixing screws to be combined.

  In this configuration, the metal divided seat plate is made of cast iron, the lightweight decorative panel has a predetermined thickness, and includes a plurality of reinforcing ribs that are parallel to each other across the thickness at a predetermined interval. A configuration is proposed which is a flat synthetic wood.

  Here, the synthetic wood is preferably obtained by mixing and melting a synthetic resin such as wood powder and polypropylene, and an organic reinforcing agent, and extruding as a hollow plate material from a die having a slit corresponding to the cross-sectional shape of the desired synthetic wood. Can be used. In such synthetic wood, a plurality of mutually parallel reinforcing ribs crossing the thickness are formed at predetermined intervals in the width direction, and the reinforcing ribs are continuous in the longitudinal direction.

  Further, on the back surface of a lightweight decorative panel made of a synthetic material of hollow flat plate having a predetermined thickness and having a plurality of parallel reinforcing ribs crossing the thickness at predetermined intervals, the reinforcing ribs are positioned at the positions. The rear face side of the lightweight decorative panel by screwing and embedding a demon nut having a male screw portion on the outer peripheral surface and a female screw portion on the inner peripheral surface through the male screw portion on the outer peripheral surface On the other hand, a long hole-like locking opening portion of the metal divided seat plate is formed along the reinforcing rib provided with the screw hole, and from below the long hole-like locking opening portion. The structure which fixes a lightweight decorative panel to a metal division | segmentation seat board with the some fixing screw penetrated and screwed by the screw hole is proposed.

  As described above, the present invention includes a metal divided seat plate that is divided in the circumferential direction and connected and integrated with each other in a state of surrounding the roots of the trees, and covers the upper portions of the metal divided seat plates. A tree root covering device comprising a lightweight decorative panel to be worn, wherein a plurality of screw heads of a fixing screw inserted from below can be locked to the metal divided seat plate with opposing rims. While providing a long hole-like locking opening, a screw hole is provided at a position corresponding to the long hole-like locking opening on the back of the lightweight decorative panel, and is inserted from below the long hole-like locking opening. Since it is a tree root covering device in which a lightweight decorative panel is fixed to a metal divided seat plate by a plurality of fixing screws screwed into the screw holes, the metal divided division is used for construction. Attach the lightweight decorative panel to the top of the seat plate and place it on the back of the lightweight decorative panel. With each screw hole being aligned with a plurality of long hole-like locking openings of the metal divided seat plate, a plurality of fixing screws are inserted from below the long hole-like locking openings to reduce the weight. By screwing the screw holes into the screw holes of the decorative panel, the heads of the fixing screws are locked to the facing edges of the long hole-shaped locking openings, and the lightweight decorative panel is tightened through the tightening action of the fixing screws. Can be fixed to the metal divided seat plate. Here, since the fixing screw is for fixing the lightweight decorative panel on the back side of the lightweight decorative panel, the fixing screw is not exposed on the front surface side of the lightweight decorative panel. It will not be damaged. In addition, the lightweight decorative panel can be fixed simply by inserting each fixing screw from below the elongated hole-shaped locking opening and screwing it into the screw holes provided on the back surface of the lightweight decorative panel. The fixing operation can be performed very easily. This eliminates the need for troublesome engagement and fixing operations using a special fixing tool that can be elastically deformed, as in the prior art, after fixing, by inserting a buried tree into the counterbore and closing the counterbore. Since the number of parts does not increase, the cost is not increased. Furthermore, since a metal division | segmentation seat plate and a lightweight decorative panel can be disassembled and can be conveyed, the handleability which was excellent in carrying in to a construction site and the time of construction can be obtained.

  Further, the metal divided seat plate is made of cast iron, the lightweight decorative panel has a predetermined thickness, and a hollow plate-like synthetic wood having a plurality of mutually parallel reinforcing ribs crossing the thickness at a predetermined interval; In this configuration, a predetermined robustness can be obtained by the cast iron metal divided seat plate, and a plurality of long hole-like locking openings provided in the metal divided seat plate can be easily and simultaneously provided at the time of casting. Further, the metal divided seat plate can be reduced in weight by the long hole-like locking opening. On the other hand, by using hollow flat synthetic wood for the lightweight decorative panel, the lightweight decorative panel can be made light and have a predetermined strength. The design can be improved as compared with conventional castings or synthetic resins. In addition, synthetic wood is extremely cheap compared to natural wood, and thus has an advantage that the manufacturing cost can be reduced. In addition, by reducing the weight of the metal split seat and the lightweight decorative panel, the metal split seat and the lightweight decorative panel can be disassembled and transported as described above. The handling property at the time of construction can be further improved.

  Further, on the back surface of a lightweight decorative panel made of a synthetic material of hollow flat plate having a predetermined thickness and having a plurality of parallel reinforcing ribs crossing the thickness at predetermined intervals, the reinforcing ribs are positioned at the positions. The rear face side of the lightweight decorative panel by screwing and embedding a demon nut having a male screw portion on the outer peripheral surface and a female screw portion on the inner peripheral surface through the male screw portion on the outer peripheral surface On the other hand, a long hole-like locking opening portion of the metal divided seat plate is formed along the reinforcing rib provided with the screw hole, and from below the long hole-like locking opening portion. In a configuration in which the lightweight decorative panel is fixed to the metal divided seat plate by a plurality of fixing screws that are inserted and screwed into the screw holes, a predetermined position having a reinforcing rib across the thickness on the back surface of the lightweight decorative panel In order to embed the demon nut screwed in In addition, each demon nut can be firmly held by a lightweight decorative panel made of hollow flat synthetic wood, and a plurality of screw holes opened on the back side of the lightweight decorative panel by the female screw portion of each demon nut Can be easily provided. Further, by providing the elongated hole-like locking opening of the metal divided seat plate along the reinforcing rib provided with the screw hole, even if the screw hole is displaced in the direction of the reinforcing rib, It can be easily handled.

  Below, one Example of the root cover apparatus of the tree concerning this invention is described based on FIGS. As shown in FIG. 1, the tree root covering device 1 surrounds the root of the tree T, and includes four metal divided seat plates 2 (see FIG. 2) divided in the circumferential direction, And a plurality of lightweight decorative panels 3 attached to the upper part of the metal divided seat plate 2. The four metal divided seat plates 2 are integrated by connecting to each other using connecting bolts 8 and 8 and a connecting metal fitting 9 (see FIG. 4), which will be described later. An opening 4 through which the tree T can be inserted is formed.

  Each metal divided seat plate 2 is manufactured by casting, and as shown in FIGS. 2 and 3, has a substantially L-shaped planar shape, and has a plurality of long hole-like members parallel to each other along the circumferential direction. A stop opening 5 and a plurality of rectangular openings 6 wider than the long hole-like locking opening 5 are formed simultaneously during casting. Here, each of the long hole-like locking openings 5 is provided with an opening width slightly larger than the diameter of a shaft portion of a fixing screw 15 (see FIG. 7) described later and narrower than the diameter of the head, and from below. The head of the fixed screw 15 to be inserted can be locked by the facing lip. Moreover, each metal division | segmentation seating board 2 is set to the thickness below half of the whole thickness including the lightweight decorative panel 3 adhere | attached on the upper part (refer FIG. 7), This thickness and the said oblong hole The weight of the metal divided seat plate 2 is reduced by the shape locking opening 5 and the rectangular opening 6.

  In the vicinity of the side edge on the inner peripheral side of each metal divided seat plate 2, a long hole-like bolt insertion hole 7 along the circumferential direction is formed, as shown in FIGS. 4 (a) and 4 (b). In addition, the connecting bolts 8, 8 inserted from above into the bolt insertion holes 7, 7 of the adjacent metal divided seat plates 2, 2 are inserted into the screw holes 10, 10 of the L-shaped connecting bracket 9 that is directed to the lower surface side. By screwing, the adjacent metal divided seat plates 2 and 2 can be connected to each other.

  On the other hand, as shown in FIG. 5 (a), the plurality of lightweight decorative panels 3 have a predetermined thickness, and have a hollow flat plate shape having a plurality of reinforcing ribs 11 parallel to each other across the thickness at predetermined intervals. Made of synthetic wood. The synthetic wood is mixed and melted with wood flour (about 55% by weight), synthetic resin such as polypropylene (about 45% by weight), and organic reinforcing agent (about 0.5% by weight). Extrusion-molded as a hollow plate material from a die having a slit is used. In such synthetic wood, a plurality of reinforcing ribs 11 parallel to each other across the thickness are formed at predetermined intervals in the width direction, and the reinforcing ribs 11 are continuous in the longitudinal direction. In addition, on one surface of the lightweight decorative panel 3 made of synthetic wood, an unevenness 12 that is continuous in the longitudinal direction is formed by extrusion on the surface that becomes the upper surface when in use, and the unevenness 12 provides an anti-slip action. It is like that.

  The lightweight decorative panel 3 made of synthetic wood is combined into an L shape through an inclined end of an elongated synthetic wood cut into a predetermined length and having one end cut at an angle of 45 °. Thus, as shown in FIG. 6, the upper part of the metal divided seat plate 2 can be covered. Here, FIG. 6 shows an example in which four lightweight decorative panels 3 are used, but the number of lightweight decorative panels 3 is not limited to this, and is approximately twice that of the illustrated synthetic wood. It is also possible to make two lightweight decorative panels 3 using synthetic wood having a width of 6 or more than 6 lightweight decorative panels 3 using synthetic wood having a narrower width than the illustrated one.

  On the back surface of each lightweight decorative panel 3, a demon nut 13 is embedded at a position where the reinforcing rib 11 is located, as shown in FIG. The demon nut 13 is provided with a male screw portion on the outer peripheral surface and a female screw portion on the inner peripheral surface, and the male screw portion on the outer peripheral surface in a prepared hole 16 formed in advance using a drill. A plurality of screw holes 14 opened on the back surface side of the lightweight decorative panel 3 are provided by the female screw portion of the demon nut 13. Here, each screw hole 14 is provided at a position corresponding to each of the long hole-like locking openings 5 of the metal divided seat plate 2 described above. The locking openings 5 are formed along the reinforcing ribs 11 provided with the screw holes 14 so that the screw holes 14 coincide with the long hole-shaped locking openings 5.

  Then, as shown in FIG. 7, each lightweight decorative panel 3 is divided into a metal by a plurality of fixing screws 15 that are inserted from below the long hole-like locking openings 5 and screwed into the screw holes 14. The upper part of the seat plate 2 is fixed.

  Further, as shown in FIGS. 6 and 7, a joint member 17 having a substantially L-shaped planar shape formed by casting is disposed on the inner peripheral upper surface of each metal divided seat plate 2. The joint member 17 is formed to have the same thickness as each of the lightweight decorative panels 3, and on the back surface, at a position corresponding to the long hole-like locking opening 5 located on the inner peripheral side of the metal divided seat plate 2. A plurality of screw holes 18 are provided. Then, the joint member 17 is fixed to the upper surface on the inner peripheral side of the metal divided seat plate 2 by a plurality of fixing screws 15 that are inserted into the long hole-like locking openings 5 from below and screwed into the screw holes 18. Like to do. The joint member 17 is not necessarily required and can be removed, but the design property is improved by providing the joint member 17.

  In this construction, when construction is performed, the lightweight decorative panel 3 is directed to the upper part of the metal divided seat plate 2, and each screw hole 14 provided on the back surface of the lightweight decorative panel 3 is inserted into the metal divided seat. A plurality of fixing screws 15 are inserted from below the long hole-shaped locking openings 5 in a state of being aligned with the plurality of long hole-shaped locking openings 5 of the plate 2, and screw holes 14 of the lightweight decorative panel 3. As shown in FIG. 7, the heads of the fixing screws 15 are locked to the opposite rims of the long hole-shaped locking openings 5, and the fixing screws 15 are tightened to each other. Thus, the lightweight decorative panel 3 can be fixed to the metal divided seat plate 2. Here, since the fixing screw 15 fixes the lightweight decorative panel 3 on the back side of the lightweight decorative panel 3, the fixing screw 15 is not exposed on the surface side of the lightweight decorative panel 3, thereby , Its aesthetics are not impaired. Further, the lightweight decorative panel 3 can be fixed simply by inserting each fixing screw 15 from below the long hole-like locking opening 5 and screwing it into the screw holes 14 provided on the back surface of the lightweight decorative panel 3. Therefore, the fixing operation can be performed very easily. This eliminates the need for troublesome engagement and fixing operations using a special fixing tool that can be elastically deformed, as in the prior art, after fixing, by inserting a buried tree into the counterbore and closing the counterbore. Since the number of parts does not increase, the cost is not increased. Furthermore, since the metal division | segmentation seat board 2 and the lightweight decorative panel 3 can be disassembled and can be conveyed, the handleability which was excellent in carrying in to a construction site and the time of construction can be obtained.

  Further, the metal divided seat plate 2 is made of cast iron, and the lightweight decorative panel 3 has a predetermined thickness and a hollow flat plate shape having a plurality of reinforcing ribs 11 parallel to each other at predetermined intervals. By using synthetic wood, predetermined solidity can be obtained by the cast iron metal divided seat plate 2, and a plurality of long hole-like locking openings 5 provided in the metal divided seat plate 2 can be formed at the time of casting. They can be easily formed at the same time, and the metal divided seat plate 2 can be reduced in weight by the long hole-like locking openings 5. On the other hand, by using a hollow flat synthetic wood for the lightweight decorative panel 3, it is possible to make the lightweight decorative panel 3 lightweight with a predetermined strength, and substantially the same material as the natural wood of the synthetic wood. Depending on the feeling, the design can be improved as compared with conventional castings and synthetic resins. In addition, synthetic wood is extremely cheap compared to natural wood, and thus has an advantage that the manufacturing cost can be reduced. In addition, the weight reduction of the metal divided seat plate 2 and the lightweight decorative panel 3 allows the construction site to be combined with the fact that the metal divided seat plate 2 and the lightweight decorative panel 3 can be disassembled and transported as described above. The handling at the time of carrying in and construction can be further improved.

  Further, the demon nuts 13 are respectively screwed and embedded at predetermined positions on the back surface of the lightweight decorative panel 3 with the reinforcing ribs 11 crossing the thickness, so that each demon nut 13 is made of a hollow flat plate-shaped synthetic wood. The lightweight decorative panel 3 can be firmly held, and a plurality of screw holes 14 opened to the back side of the lightweight decorative panel 3 by the female screw portion of each demon nut 13 can be easily provided. Further, by forming the long hole-like locking opening 5 of the metal divided seat plate 2 along the reinforcing rib 11 provided with the screw hole 14, the screw hole 14 is displaced in the direction of the reinforcing rib 11. Even when it is, it is possible to easily cope with the positional deviation.

It is a top view of the root cover apparatus 1 of the tree concerning this invention. It is a top view of the metal division | segmentation seat board 2 which comprises the root | cover cover apparatus 1 same as the above. It is an AA expanded sectional view in FIG. (A) is a partially enlarged plan view showing a state in which adjacent metal divided seat plates 2 and 2 are connected by connecting bolts 8 and 8 and a connecting fitting 9, and (b) is a side sectional view thereof. (A) is a side sectional view of the lightweight decorative panel 3, and (B) is a side sectional view in a state where the demon nut 13 is embedded. It is a top view which shows the state by which the lightweight decorative panel 3 was adhere | attached on the upper part of the metal division | segmentation seat plates 2. FIG. It is BB expanded sectional drawing in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Root cover device 2 Metal division | segmentation seat board 3 Light weight decorative panel 5 Long hole-like latching opening part 11 Reinforcement rib 13 Oni nut 14 Screw hole 15 Fixing screw T Tree

Claims (3)

A metal split seat plate that is divided in the circumferential direction and integrated with each other in a state of surrounding the root of the tree, and a lightweight decorative panel that is attached to the upper part of each metal split seat plate A root covering device for trees,
The metal divided seat plate is provided with a plurality of long hole-like locking openings that can lock the heads of the fixing screws inserted from below with opposing rims, while the long holes are formed on the back surface of the lightweight decorative panel. The lightweight decorative panel is made of metal by a plurality of fixing screws which are provided with screw holes at positions corresponding to the shaped locking openings and are inserted from below the long hole shaped locking openings and screwed into the screw holes. A tree root covering device characterized by being fixed to a divided seat.   The metal divided seat plate is made of cast iron, and the lightweight decorative panel is a hollow plate-shaped synthetic wood having a predetermined thickness and a plurality of mutually parallel reinforcing ribs crossing the thickness at predetermined intervals. The tree root covering device according to claim 1, wherein the tree root covering device is provided. On the back surface of a lightweight decorative panel made of a hollow plate-shaped synthetic wood having a predetermined thickness and having a plurality of parallel reinforcing ribs crossing the thickness at predetermined intervals, the outer periphery is located at the position where the reinforcing rib is located. Opening the back side of the lightweight decorative panel by screwing and embedding a demon nut with a male screw part on the surface and a female screw part on the inner peripheral surface through the male screw part on the outer peripheral surface While the plurality of screw holes are provided, the long hole-like locking opening of the metal divided seat plate is formed along the reinforcing rib provided with the screw hole, and is inserted from below the long hole-like locking opening. The tree root covering device according to claim 1 or 2, wherein the lightweight decorative panel is fixed to the metal divided seat plate by a plurality of fixing screws screwed into the screw holes.

Images