JPH0451830Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is used for sports such as track and field and various ball games that use a ground, and during competitions and practices that use a field, the surface layer of the field can be scraped into fine grains using a simple operation. The present invention relates to a ground maintenance tool that allows uniform and even ground maintenance while causing mixing and mixing.

(b) Prior art Grounds where track and field events and various ball games are held are generally outdoor facilities and are constructed by compacting sand and mud, so depending on the type of competition, spikes may be required. Initially, as a result of the extensive use of various types of equipment, the sand and mud in specific areas of the ground were significantly reduced, and the sand and mud spread and moved in many directions, severely impairing the levelness of the ground, making it difficult for various competitions. In addition, because the ground is constantly exposed to wind and rain, the surface layer gradually hardens, and the sand and mud on the surface move around, making it extremely slippery and making it difficult to conduct competitions and practice. This results in a great deal of danger.

For this reason, at present, prior to a competition or practice, a so-called rake or a so-called dragonfly, in which a scraping plate B vertical to the T-shape is attached to the tip of an appropriate gripping handle A, as shown in Figure 7, is used. The ground is maintained by using a ground leveling tool that slides over the ground surface, scraping up the sand and mud that has spread and moved everywhere, and distributing it over the excavated depressions and flattening it.

(c) Problems to be solved by the invention However, in the current level of ground maintenance, the hardened surface layer is not modified in any way, and the sand and mud that is floating around on the surface is scraped up and the soil is reduced. Since the ground is simply dispersed again into the depressed areas and leveled, even with a small amount of competition or practice, it can easily move loosely and spread, leaving the ground surface in disrepair and preventing enough good competition and practice. This is leading to undesirable results.

For this reason, in recent years, attempts have been made to rake up the hardened surface layer using appropriate soil leveling tools equipped with digging teeth, but this method involves further crushing the raked soil lumps that accompany the raking. The need for new crushing tools for granulation,
Mixing of fine-grained raking soil with floating sand and mud on the surface,
Alternatively, various equipment and operations such as pressurization and flattening after mixing are required, resulting in many problems not only in terms of workability but also in terms of economy.

The present invention was developed in view of the above circumstances, and the hardened surface layer of sand and mud is scraped by pulling or pushing on the ground and sliding the scraping tool.
Another object of the present invention is to provide a ground maintenance tool that can perform ground maintenance by crushing the raked soil into fine particles, mixing it with floating sand, and flattening it under pressure.

(d) Means for solving the problem The technical means used by the present invention to achieve the above-mentioned technical problem is to attach a frame body to the tip of a pair of frames connected to both ends of the traction rod. and a removable connecting part on one side, and approximately on the other side with respect to the connecting part.
A connecting plate is attached that is bent at an angle of 140 to 160 degrees and has a support part that supports and fixes the base of the raking tool. A scraping tooth made of iron plate material and having a triangular shape with a continuous notch on the lower side of an appropriate area is attached, and the rear part of this scraping tooth has an area ratio of 30 to 60% compared to the scraping tooth. It is equipped with fine-grained crushing teeth with continuous notches formed in a small triangular shape.
Moreover, at the rearmost portion of the base of the raking tool, one side edge of a pressing plate capable of pressing and flattening the ground surface with a required load is movably mounted on a shaft.

(e) Effects The present invention having the above structure has the following effects. In other words, a pair of frames are connected to both ends of the traction rod, and the base of the raking tool is supported and fixed to the tip of the frame via a connecting plate, so it is structurally strong and has high strength. The raking tool can resist traction and pushing forces, and the entire raking tool is slid on the ground surface. Further, the frame body and the base of the raking tool are connected through a connecting plate, and the support part that supports and fixes the base of the raking tool to the connection part with the frame body is bent at an angle of about 140 to 160 degrees. Because of this, it can be towed or pushed without requiring any special posture. The lower front part of the raking tool base that slides on the ground is equipped with a raking tooth made of iron plate whose lower side has a triangular shape with an appropriate area and continuous notches.
The tips of the raking teeth are easily embedded in the hardened surface layer of the ground to perform raking, and the rear part of the raking teeth has an area ratio of approximately 30 to 60% compared to the raking teeth. %
Since it is equipped with a refining sand crushing tooth with continuous notches formed in a small triangular shape, the sand and mud lumps that were coarsely raked up by the raking tooth are crushed even more finely, and the tip of the raking tooth Since the trajectory during sliding movement is different from that of the tip of the fine-grained crushing teeth, the sand and mud mass excavated by the scraping teeth and the sand and mud crushed by the fine-grained crushing teeth as well as the floating of the surface. The sand and mud are stirred together and thoroughly mixed. The sand and mud that has been stirred and mixed is extremely bulky, but one side edge of a pressing flat plate that constantly presses the ground surface on one side is movably pivoted at the rearmost part of the base of the raking tool. Since it is suspended, it is pressed and solidified by the pressing plate and its surface is flattened.

(F) Embodiment The embodiment of the present invention will be described below in detail based on the drawings.The traction rod 1 is used by an appropriate number of people to pull or push the entire invention on the ground with traction force or push. Iron pipe materials, iron rod materials, etc. are generally used from the viewpoints of toughness that can sufficiently withstand advancing forces, and gripability associated with towing and pushing. A pair of frames 2 and 2' are connected to both ends of the traction rod 1.
An iron square material, an iron pipe material, or an iron bar material is suitable from the viewpoints of toughness that can withstand the traction force or pushing force during sliding movement, and connectivity with the traction rod 1. There is no particular restriction on the means for connecting the traction rod 1 and the frames 2, 2', and welding, appropriate fitting, etc. are proposed.

At the tips of the pair of frames 2, 2' thus formed,
A connecting portion 3A that can be detachably attached to the frames 2, 2' is formed on one side, and the other side is approximately 140 to 160 degrees with respect to the connecting portion 3A, as shown in Fig. 3. Angle α or B with respect to the extension line A-A'
A connecting plate 3 is attached which is bent at an angle matching the line -B' and is formed with a support part 3B that can support and fix the raking tool base 4A. This connecting plate 3
A removable connecting means between the connecting part 3A and the frames 2, 2', or the supporting part 3B and the raking tool base 4A.
There are no particular restrictions on the supporting and fixing means, and a simple method is proposed, for example, which involves drilling appropriate connecting holes and threadingly connecting them with bolts and nuts. Furthermore, since the connecting plate 3 is also required to have sufficient toughness, it is convenient to use an iron plate material. At the lower front part of the raking tool base 4A, which is supported and fixed to the support part 3B of the connecting plate 3, there is a raking tooth 4B made of iron plate material, the lower side of which is formed with continuous notches in a triangular shape with an appropriate area. Installed by means. This raking tooth 4B is required to be easily embedded in the hardened surface layer of the ground to perform raking and to remove relatively large rocks and gravel. It is formed with a coarse density, and the specific size of the triangular shape formed by continuous notches is generally about 40 to 60 mm between the tips of the scraping teeth 40B and 40B, and the height of the scraping teeth 4B. The distance between the so-called scraping tooth tip 40B and the scraping tooth top floor 41B is approximately 40~
Formed to 60mm. Since the scraping tooth 4B is subjected to extremely large scraping mud resistance during sliding movement, it is preferably made of an iron plate material with a thickness of 8 mm or more.

A fine crushing tooth 4 is provided at an appropriate rear portion of the scraping tooth 4B.
C is similarly attached to the raking tool base 4A using appropriate means. These fine-grained crushing teeth 4C are continuously formed with triangular notches that are approximately 30 to 60% smaller in area ratio than the triangular notches formed in the scraping tooth 4B attached to the front part. Moreover, the pulverizing tooth tip 40C and the scraping tooth tip 40B have different trajectories when sliding on the ground surface. Since the refining crushing teeth 4C are also subject to considerable sand and mud resistance during sliding movement, it is preferable to use an iron plate material that is approximately the same as the scraping teeth 4B. . Further, the height between the tip 40C of the sand-refining tooth and the base 4A of the raking tool is naturally the same as the height between the tip 40B of the raking tooth and the base 4A of the raking tool.

The rearmost part of the raking tool base 4A is made of an iron plate material of the required weight, and one side edge thereof is axially mounted to the raking tool base 4A via a suitable shaft holder 4E, and the other end is A pressing flat plate 4D that constantly presses the ground surface to flatten it is movably mounted on a shaft.

Of course, the hardness of the surface layer of the ground varies depending on the soil quality, so the hardness of the ground surface layer varies depending on the soil quality, so it is necessary to use the raking tool base 4A, the raking teeth 4B, the pulverizing sand-breaking teeth 4C, or the pressing plate attached to the raking tool base 4A. Even better results can be obtained by appropriately combining and adjusting the forming materials such as 4D, weight, etc. In this way, the raking tool base 4
A raking tool 4 is constituted by raking teeth 4C, granulation crushing teeth 4C, pressing flat plate 4D, and the like.

(g) Effects of the invention Since the invention uses the technical means described above, it has the following unique effects.

A traction rod for pulling or pushing is connected to a connecting plate through a frame, and the supporting part bent at an angle of approximately 140 to 160 degrees with respect to the connecting part of the connecting plate is used for raking soil. Since the base of the tool is supported and fixed, the work can be easily done without requiring any special posture during sliding movement operation.Moreover, since the entire device is quite bulky, it has to be attached to the front part and is rough. The densely formed raking teeth can easily burrow into the hardened surface layer of the ground and provide sufficient raking. The raking tooth The sand and mud that are still in the form of lumps that have been excavated and scraped are subsequently crushed and made into fine particles, and are sufficiently mixed with the sand and mud that is floating on the surface.

The bulky sand and mud that has been stirred and mixed in this way is pressurized by the pressing plate with the required load, so it is homogeneously solidified and the ground surface is prepared evenly, with extremely simple operations. Digging, crushing and refining,
It can be said to be an excellent ground maintenance tool that can instantly perform stirring, mixing, and flattening by pressing.

[Brief explanation of the drawing]

Figure 1 is a sketch of the traction rod and frame body, Figure 2 is a sketch of the connecting plate, Figure 3 is an explanatory view of the same side, Figure 4 is an explanatory diagram of the scraping teeth, and Figure 5 is a fine-grained crusher. FIG. 6 is an explanatory diagram of teeth, FIG. 6 is an explanatory diagram of a raking tool, and FIG. 7 is an explanatory diagram of a conventional ground leveling tool. Explanation of symbols, 1... Traction rod, 2, 2'... Frame,
3... Connecting plate tool, 3A... Connecting part, 3B... Supporting part, 4... Scraping tool, 4A... Scraping tool base, 4B...
...Scraping tooth, 4C...Refined crushing tooth, 4D...Press flat plate, 4E...Shaft bracket, 40B...Scraping tooth tip, 41B...Scraping tooth top, 40C...Fine Granulated fracture tooth tip.

Claims (1)

[Scope of utility model registration request] At the tips of a pair of frames connected to both ends of the traction rod, a connecting part that can be attached and detached from the frame is bent on one side and at an angle of about 140 to 160 degrees with respect to the connecting part on the other side. In addition, a connecting plate in which a support part for supporting and fixing the raking tool base is formed is attached, and the lower side of the iron plate material is properly connected to the lower front part of the raking tool base via the connecting plate. The scraping tooth has a triangular area and is continuously cut out, and the rear part of the scraping tooth has fine grains that have a triangular shape and a continuous notch that is approximately 30 to 60% smaller in area than the scraping tooth. A crushing tooth is attached, and one side edge of a pressing flat plate that can press and flatten the ground surface with the required load is attached to the rear end of the scraper base and pivots freely. A ground maintenance tool characterized by being suspended.