KR102181287B1 - Double-layered mat for protecting grass - Google Patents

Abstract

The present invention provides a double-layered mat for protecting grass comprising: a plurality of lower mats provided with grass passage holes, provided to cover the ground without being separated from the ground, and arranged on the ground adjacent to each other before turf is laid; and a plurality of upper mats provided with grass passage holes, placed on upper sides of the lower mats while forming a space in which the turf is located on upper parts of the lower mats, and arranged adjacent to each other while being positioned to be arranged across the adjacent lower mats.

Description

DOUBLE-LAYERED MAT FOR PROTECTING GRASS}

The present invention relates to a double mat for lawn protection suitable to be installed in a lawn growing area (eg, outdoor parking lot, etc.) where a large load is frequently applied.

Grass is a perennial grass that grows in a field or in a mountain and grows in small groups with roots attached. Today, lawns are artificially grown in various areas for the purpose of landscaping, preventing injury to athletes, and preventing soil collapse.

Turf growing areas are generally formed by laying turf on the ground (a piece of grass pulled from the roots with the soil attached) and growing the turf of the turf. However, in this case, when a load caused by a person or a vehicle passing through the grass growing area is repeatedly applied to the grass, there is a problem that the grass cannot grow. Therefore, when creating a turf growing area, a turf protection mat is installed in parallel to prevent a load from being applied to the turf.

An example of the turf protection mat is disclosed in Registration Patent No. 10-0898546 (grass protection mat) and Registration Patent No. 10-1063271 (grass protection mat). The turf protection mat disclosed in these registered patents is installed on the ground of a turf growing area in a combined form. In addition, each turf protection mat includes a frame having multiple-shaped turf passage spaces, and also has legs extending downward from each vertex of the turf passage space. When the turf protection mat is installed on the ground, the lower ends of the legs are in contact with the ground, so that the frame is supported by the legs, away from the ground, providing space for the turf to be located.

Another example of the grass protection mat is disclosed in Utility Model Registration No. 20-0416783 (grass protection mat) and Patent No. 10-1772846 (construction method of grass protection mat and lower support mat for soft ground).

The grass protection mat disclosed in the above registered utility model publication is a technology in which the legs of the above Patent No. 10-0898546 and No. 10-1063271 are replaced with plates. And the turf protection mat disclosed in Patent No. 10-1772846 is a technology in which a separate upper mat is detachably superposed on the upper surface of the frame of Patent No. 10-0898546 and No. 10-1063271.

Registered Patent No. 10-0898546 (grass protection mat) Registered Patent No. 10-1063271 (grass protection mat) Registered Utility Model Publication No. 20-0416783 (Grass protection mat) Registered Patent No. 10-1772846 (Construction method of grass protection mat and lower support mat for soft ground)

Today, grass growing areas are continuously increasing, and as a result, there is a demand to create outdoor parking lots provided in parks as grass growing areas.

However, since outdoor parking lots are parked with vehicles (cars, buses, trucks, etc.) weighing up to tens of tons, suitable lawn protection mats are provided in areas where large loads are repeatedly applied, such as outdoor parking lots. It must be installed.

However, in the conventional turf protection mats introduced above, when a large load is applied, the legs sink into the ground and the frame sinks. This causes a problem in which the legs damage the growth point of the grass, and the frame presses the grass. Thus, turf growth cannot be performed properly. In addition, in the conventional turf protection mats, the extent of subsidence [the degree of unequal subsidence] is greater in a portion receiving a large load than a portion that is not subjected to a large load, and thus a problem in which the frame may be damaged occurs.

Accordingly, an object of the present invention is to provide a double mat for turf protection capable of exhibiting excellent turf protection function and structural stability even when installed in a turf growing area where a large load repeatedly acts, such as an outdoor parking lot.

The present invention includes a plurality of lower mats provided with grass passage holes, provided to cover the ground without being separated from the ground, and arranged on the ground adjacent to each other before the turf is laid; And a plurality of grass passage holes, which are placed on the upper surfaces of the lower mats while forming a space in which the turf is located above the lower mats, and are arranged adjacent to each other while being positioned to span the adjacent lower mats. It provides a double mat for turf protection including an upper mat.

The upper mat may include a frame having the grass passage holes; And pillars extending downward from the lower surface of the frame and having a lower end placed on the upper surfaces of the lower mats.

Insertion grooves are provided on the upper surface of the lower mat, and the pillars include main pillars having a lower end inserted into the insertion grooves.

Each of the insertion grooves may be provided in a shape surrounded by a protrusion protruding upward from an upper surface of the lower mat. In addition, each of the insertion grooves may be provided in a form that is cut down from the upper surface of the lower mat to a depth smaller than the thickness of the lower mat.

Each of the insertion grooves may be provided to have openings that are open toward grass passage holes positioned around them.

A guider protruding upward is provided on an upper surface of the lower mat, and the guider is provided to prevent frames of adjacent upper mats from moving in a horizontal direction.

The guider includes a central guider positioned at the center of the lower mat. In addition, the guider may include side guides positioned on both sides in the horizontal direction, on both sides in the vertical direction, or on both sides in the horizontal direction and on both sides in the vertical direction around the center guider.

A plurality of guiders may be provided, and some of the guiders may have corners with corner grooves extending in the vertical direction. In this case, the lower surface of the frame of the upper mat is provided in a form extending downwardly and a fastening pillar inserted into the corner groove.

The pillars may include main pillars arranged around each of the grass passage holes provided in the frame; And strength reinforcing pillars arranged along the rim of the frame and having a cross-sectional area larger than that of the main pillars. In addition, the pillars are arranged along an adjacent boundary of the lower mat, have a cross-sectional area larger than that of the main pillars, and load distribution pillars contacting upper surfaces of all adjacent lower mats.

The upper mat and the lower mat are fixed to the ground by a plurality of fixing means that are stuck in the ground while pressing the frame down. The fixing means may be made of a "c" shaped peg. In this case, it is preferable that a plurality of seating grooves are provided on the upper surface of the frame for seating the upper end of the peg. Some of the plurality of fixing means are provided to simultaneously press the edges of two adjacent upper mats.

A plurality of ribs to be located in the ground may be provided on a lower surface of the lower mat to form a grid.

The rib extends from one rim of the lower mat toward the rim on the opposite side, and at one end of the rib, a lower plate fastening hole protruding upward from the outside of the one rim is provided, and is located between the opposite end of the rib and the opposite rim. A lower plate fastening hole having the same shape as the lower plate fastening hole may be provided at a portion of the lower mat. The lower surface of the rib may be provided in an arch shape.

According to the present invention, since the lower mat, which is in contact with the ground over a large area, supports the upper mat, even if a large load is applied to the upper mat, the upper mat does not sink into the ground. In addition, since the upper mats are staggered with respect to the lower mats, the load acting on the upper mat is distributed to the adjacent lower mats, thereby preventing differential settlement of the upper and lower mats.

In addition, according to the present invention, due to the insertion grooves and guiders provided on the upper surface of the lower mat, the upper mats are not pushed in the horizontal direction from the upper surface of the lower mat, and yet, dirt in the insertion grooves due to the opening provided in the upper insertion grooves. Can be easily removed from the insertion grooves.

In addition, according to the present invention, the strength at the edge of the upper mat may be reinforced due to the strength reinforcing pillars of the upper mat, and the load may be distributed to the adjacent lower mats due to the load distribution columns of the upper mat.

In addition, according to the present invention, it is possible to fix the upper and lower mats to the ground at the same time through a fixing means such as a "c"-shaped peg, and in addition, a fixed coupling between adjacent upper mats can also be realized, and the upper fixing means repeatedly loads Even if you receive it, you will not be excited.

In addition, according to the present invention, the lower mat is not pushed horizontally on the ground due to the rib on the bottom of the lower mat, and the lower plate fastening hole is provided on the upper rib, so that the ribs automatically take a straight line shape by simply combining the lower mats. Is done.

In addition, according to the present invention, the coupling between neighboring lower mats may be provided by an upper mat that is placed over the neighboring lower mats, and the work of installing the upper mat on the lower mat is very convenient. good.

1 is a plan view showing an installation state of a double mat for lawn protection according to the present invention.
2 is a plan view partially showing a state in which the upper mat shown in FIG. 1 is adjacent.
3 is a perspective view illustrating the lower mat shown in FIG. 1.
4 is a top perspective view showing a partially enlarged lower mat of FIG. 3.
5 is a bottom perspective view showing a partially enlarged lower mat of FIG. 3.
6 is a perspective view showing the upper mat shown in FIG. 1.
FIG. 7 is a partially enlarged top perspective view of the upper mat of FIG. 6.
8 is a bottom perspective view showing an enlarged portion of the upper mat of FIG. 6.
9 and 10 are modified examples of the center guider and the side guider shown in FIG. 3.
11 shows a fastening column for insertion into the corner groove shown in FIGS. 9 and 10.
12 is a plan view showing an installation state of the lower mat having a corner groove of FIGS. 9 and 10 and the upper mat having a fastening column of FIG. 11.

Hereinafter, preferred embodiments of the double mat for protecting grass according to the present invention will be described in detail with reference to the drawings. The terms or words used below should not be interpreted as being limited to their usual or dictionary meanings, and based on the principle that the inventor can appropriately define the concept of terms in order to explain his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

In the double mat for turf protection according to the present invention, the lower mat 100, the upper mat 200, and the grass passage holes 102 and 202 provided in these (100, 200) may be provided in a polygonal shape other than a square shape. , In the following, for convenience, a square shape is used as an example.

The above turf protection double mat is suitable to be installed in a turf growing area, particularly in a turf growing area where a large load repeatedly acts, such as a parking lot, and includes a lower mat 100 and an upper mat 200. In the following, for ease of understanding, the upper turf protection double mat is divided into a lower mat 100, an upper mat 200, and a double mat.

<Lower mat (100)>

The lower mat 100 is arranged on the ground adjacent to each other before the turf is laid, and is provided in a square shape having grass passage holes 102 regularly as shown in FIGS. 3 to 5. The lower surface of the lower mat 100 is provided flat and comes into contact with the ground, whereby the lower mat 100 covers the ground without being separated from the ground.

The upper surface of the lower mat 100 is provided so that the insertion grooves are located at the vertices of the grass passage hole 102, and the lower ends of the main pillars 222 provided in the upper mat 200 are respectively inserted into the insertion grooves. Due to these insertion grooves, the upper mat 200 can maintain its position without being pushed in the horizontal direction when placed on the upper surface of the lower mat 100.

The insertion groove may be provided in a form surrounded by a protrusion 122 protruding upward from the upper surface of the lower mat 100 as shown in FIG. 4. In this case, the protrusion 122 is preferably provided with an opening 122a that is open toward at least a portion of the four turf passage holes 102 around it, and then the process of installing the lower mat 100 on the ground Even if soil enters into the insertion groove formed by the protrusion 122 in, this soil can be easily removed from the insertion groove.

Although not shown, the upper insertion groove may be provided in a form that is cut down from the upper surface of the lower mat 100 to a depth smaller than the thickness of the lower mat 100. Even in this case, it is preferable to provide the same opening as the opening portion 122a described above.

Guiders 132 and 134 protruding upward are also provided on the upper surface of the lower mat 100, and the guiders 132 and 134 have upper mats 200 placed adjacent to each other on the upper surface of the lower mat 100 in a horizontal direction. It is prepared not to allow being pushed by. As described above, the horizontal push of the upper mat 200 can be prevented by inserting the main pillars 222 of the upper mat 200 into the insertion grooves on the upper surface of the lower mat 100, respectively, and the upper guide 132 , 134 is to prevent the horizontal direction push of the upper mats 200 together with the insertion grooves. Meanwhile, the upper guides 132 and 134 additionally perform a function of guiding the installation position of the upper mat 200.

These guides 132 and 134 include a central guider 132. The central guider 132 is located in the center of the lower mat 100 as shown in FIG. 3 and is provided in a shape that can contact the edges of the four adjacent upper mats 200. To this end, the central guider 132 may be provided to have a "T"-shaped cross-section as shown in FIG. 3, or may be provided to have a "+"-shaped cross-section, although not shown. In addition, the central guider 132 protrudes upward from the upper surface of the lower mat 100 while having a height about the thickness of the upper mat 200. Accordingly, the adjacent upper mat 200 is blocked by the center guider 132 and is not pushed in the horizontal direction.

The upper guiders 132 and 134 may also include a side guider 134. As shown in FIG. 3, the side guider 134 is located at both ends in the horizontal direction around the center guider 132, and is provided in a flat plate shape to contact the edges of the two adjacent upper mats 200, as shown in FIG. Like 132, it protrudes from the upper surface of the lower mat 100 while having a height about the thickness of the upper mat 200. Accordingly, two adjacent upper mats 200 are blocked by the side guides 132 and are not pushed in the horizontal direction.

3, the side guides 134 are shown to be located at both ends in the horizontal direction, but may be located closer to the central guider 132 than that. In addition, although it is shown in FIG. 3 that the side guides 134 are located only at both ends in the horizontal direction, in some cases, the side guides 132 may be located at both sides in the vertical direction around the center guider 132.

Previously, it was described that the insertion groove is located at the vertex of the grass passage hole 102. However, even in this case, as shown in FIG. 3, points 114 (hereinafter referred to as "vertical points") arranged along the vertical direction from the central guider 132 and points 116 arranged along the horizontal direction It is good that the upper insertion groove is not formed in (hereinafter referred to as "horizontal points"), and then the strength reinforcing pillars of the upper mat 200 to be placed on the upper vertical points 114 and the horizontal points 116 ( This is because 224 can be formed in a cross-sectional area larger than that of the main pillars 222 of the upper mat 200 to reinforce the strength of the edge of the upper mat 200.

In addition, it is preferable that the rim 112 of the lower mat 100 does not have an insertion groove as shown in FIG. 3. In this case, by providing the upper mat 200 with load distribution columns 226 that can be placed across the rim 112 of the two adjacent lower mats 100, the upper mat ( 200) can be distributed.

Meanwhile, a plurality of ribs 142 and 144 forming a grid are provided on the lower surface of the lower mat 100 as shown in FIGS. 3 and 5. The upper ribs 142 and 144 have a shape protruding downward from the lower surface of the lower mat 100 and are positioned in the ground when the lower mat 100 covers the ground. Due to these ribs 142 and 144, the lower mat 100 can maintain its position on the ground without being pushed in the horizontal direction.

The upper ribs 142 and 144 may include a vertical rib 142 and a transverse rib 144.

The vertical rib 142 extends along the vertical direction of the lower mat 100, and at this time, one end of the opposite ends of the vertical rib 142 is located outside the one edge 112 of the lower mat 100, The opposite end is located at a place that does not reach the opposite side rim 112 located on the opposite side of the one rim 112 above. And the lower plate fastening hole (146a) is provided to protrude upward at one end of the vertical rib 142, and the upper lower plate is located in the portion of the lower mat 100 located between the opposite end of the vertical rib 142 and the upper opposite side edge 112 A lower plate fastening hole 146b having the same shape as the fastener 146a is provided.

Therefore, by simply inserting the lower plate fastening hole 146a of one lower mat 100 into the lower plate fastening hole 146a of the other lower mat 100, the two lower mats 100 can be adjacent to each other. . In addition, as long as the lower mats 100 are fastened in the same manner as above, the vertical ribs 142 are automatically aligned in the entire lower mats 100, so extra care for the straight alignment of the vertical ribs 142 There is also an advantage that is not required.

In FIG. 3, two vertical ribs 142 as described above are shown, but it is natural that the number of vertical ribs 142 may be appropriately adjusted depending on the case.

The transverse ribs 144 extend along the horizontal direction of the lower mat 100. 3 shows an example in which one transverse rib 144 is provided to extend between the left and right side guides 134, so the lower plate fastening hole 146a is not provided in the upper transverse rib 144, but the transverse rib 144 ) May also have a lower plate fastening hole 146a like the bell rib 142, or may be provided in plural.

On the other hand, it is good that the lower surfaces of the ribs 142 and 144 are provided in an arched shape as shown in FIG. 5, so that the ribs 142 and 144 can easily penetrate the ground, and after that, The advantage of not being able to move well in the horizontal direction can be achieved.

In the lower mat 100 as described above, some of the grass passage holes 102 may be blocked to further increase the contact area between the lower mat 100 and the ground. At this time, the number of grass passage holes 102 to be filmed may be appropriately selected according to the ground condition at a level that does not interfere with grass growth. When the contact area between the lower mat 100 and the ground is large, even if a large load is applied to the lower mat 100, the lower mat 100 does not sink well into the ground.

<Upper mat (200)>

The upper mat 200 is a member placed on the upper surface of the lower mats 100 while forming a space for the turf to be located above the lower mats 100 installed on the ground, and as shown in FIGS. 6 to 8 It includes 210 and pillars 222, 224, 226.

The frame 210 is a member constituting the basic frame of the upper mat 200 and is provided in a form in which a plurality of grass passage holes 202 are regularly provided inside the quadrangular rim 212.

The upper pillars 222, 224, 226 are provided to extend downward from the lower surface of the frame 210 on which the grass passage holes 202 are not formed, and the lower mat 100 when the upper mat 200 is installed Is placed on the top of Due to these pillars 222, 224, 226, a space is formed between the upper frame 210 and the lower mat 100, and this space becomes a space in which the turf is located.

The upper mats 200 are arranged adjacent to each other while being positioned to span the adjacent lower mats 100 as shown in FIG. 1. For example, as shown in FIG. 1, in a state in which four lower mats 100 cover the ground, one upper mat 200 is placed over all four lower mats 100, and this one upper mat 200 The other upper mats 200 are placed in the same manner so as to be adjacent to each other. 1 shows an example in which one upper mat 200 is placed on top of four lower mats 100, but it is natural that the number of the upper mats 100 and 200 is greater than that, and the lower mats 100 The above relative arrangement of the upper mats 200 for can be applied to all installed mats 100 and 200.

When the upper mats 200 are alternately disposed with respect to the lower mat 100 as above, the load acting on the upper mat 200 is evenly distributed to the adjacent lower mats 100, so that some of the adjacent lower mats 100 A phenomenon in which is further settled than the rest, that is, a differential settlement phenomenon does not occur in the lower mats 100.

When the upper mat 200 is disposed in the same manner as above, the corners of the four adjacent frames 210 come into contact with the center guide 132 on the upper surface of the lower mat 100, and the side guides on the upper surface of the lower mat 100 Borders 212 of two adjacent frames 210 are in contact with 134. In addition, as shown in FIG. 1, the four corners of each frame 210 are in contact with four central guides 132 formed on four adjacent lower mats 100, respectively, and the frame 212 of the frame 210 ) Is in contact with the two side guides 134 formed on the two adjacent lower mats 100, respectively. Therefore, once the upper mat 200 is placed on the lower mat 100, the upper mat 200 is blocked by the guides 132 and 134 and is not pushed in the horizontal direction.

The pillars 222, 224, 226 may include main pillars 222, strength reinforcing pillars 224, and load distribution pillars 226.

The main pillars 222 are those positioned at the vertices of each of the grass passage holes 202 provided in the frame 210. When the upper mat 200 is installed, the lower ends of the main pillars 222 are inserted into an insertion groove formed by the protrusion 122 on the upper surface of the lower mat 100. Therefore, the main pillars 222 are blocked by the protrusion 122 and are not pushed in the horizontal direction. Previously, it was described that the frame 210 is blocked by the guides 132 and 134 and is not pushed in the horizontal direction. As a result, the horizontal push of the upper mat 200 is caused by both the guides 132 and 134 and the protrusions 122 It is definitely prevented.

The strength reinforcing pillars 224 are arranged along the rim 212 of the frame 210 and have a larger cross-sectional area than the main pillar 222. In the upper frame 210, since the rim 212 is vulnerable to a load, strength reinforcing columns 224 are placed on the rim 212 to reinforce the strength. The strength reinforcing pillars 224 are placed on the vertical points 114 and the horizontal points 116 on the upper surface of the lower mat 100 when the upper mat 200 is installed.

As shown in FIG. 8, the outer surface of the strength reinforcing pillar 224 may be provided in a flat shape and the inner surface thereof may be provided in a “V” shape, which is a lower mat ( It is intended to match the shape of the turf passage hole 102 of 100. Therefore, the shape of the strength reinforcing pillar 224 may be differently provided depending on the shape of the turf passage hole 102. In addition, the main pillar If it has a cross-sectional area larger than the cross-sectional area of 222, it is not necessary to match the shape of the strength reinforcing column 224 to the shape of the grass passage hole 102.

The load distribution pillars 226 are provided to be arranged along the adjacent boundary of the lower mats 100. Referring to FIG. 1 as an example, the adjacent boundary of the lower mats 100 arranged in the vertical direction extends in a straight line along the horizontal direction. As shown in FIG. 6, the load distribution columns 226 are the upper mats 200 It is an equation that is arranged horizontally from the middle point in the vertical direction of ).

Referring to FIG. 1, the lower mats 100 are also arranged in the horizontal direction, and the adjacent boundary of the lower mats 100 may form a straight line along the vertical direction. Accordingly, the load distribution pillars 226 may be arranged in a vertical direction at a center point in the horizontal direction of the upper mat 200.

The load distribution pillars 226 as described above are in contact with the upper surfaces of all adjacent lower mats 100. For example, the load distribution pillars 226 arranged in the horizontal direction in FIG. 6 are placed to span both lower mats 100 located on both sides in the vertical direction of the adjacent boundary in a straight line in the horizontal direction in FIG. 1. If load distribution columns (not shown) arranged in the vertical direction on the upper mat 200 are also provided, these load distribution columns are also located on both sides in the horizontal direction of the adjacent boundary forming a straight line in the vertical direction in FIG. It is placed to span both lower mats 100. The load acting on the upper mat 200 due to the load distribution pillars 226 may be distributed to all of the lower mats 100 interposed between adjacent boundaries.

Meanwhile, as shown in FIG. 8, the load distribution pillar 226 as described above may be provided in a shape in which two strength reinforcing pillars 224 are overlapped, that is, a shape having an “X” cross section.

When the upper mats 200 described above are all placed on the upper surface of the lower mat 100, the upper mats 100 and 200 are fixed to the ground through a fixing means. In this embodiment, a "c"-shaped peg (not shown) is used as the fixing means. When a “c”-shaped peck is pushed down the frame 210 of the upper mat 200 into the ground at a plurality of points, the upper mats 200 and the lower mats 100 are simultaneously Is fixed to

At this time, some of the pegs used are used to press the portion of the frame 210 located around the grass passage hole 202, and the rest are used to press the rim 212 of the frame 210. And it is good that the pecks used to press the upper rim 212 are provided to simultaneously press the two adjacent rims 212 as shown in FIG. 2, and then the pecks also function to combine the two adjacent upper mats 200. Because it can.

If, in the state where the installation of the pecks is completed, the upper portion of the pegs protrudes to the upper portion of the frame 210, the upper portion of the protrusion receives a load while contacting the wheel of the vehicle. And when this phenomenon occurs repeatedly, the pegs are lifted and the mats 100 and 200 cannot be firmly fixed to the ground. Accordingly, in the present invention, as shown in FIG. 7, the mounting grooves 214 are provided on the upper surface of the frame 210 to a depth of about the thickness of the peck, and at least some of the mounting grooves 214 are located at the top of the peck. By seating, the problem that the upper portion of the peck protrudes to the upper portion of the frame 210 is solved.

<Installation of double mat>

In the case of installing the double mat for lawn protection according to the present invention, first, insert the lower plate fastening hole 146a of one lower mat 100 into the lower plate fastening hole 146b of the other lower mat 100 while going to the lower mats 100 ) On the ground.

Thereafter, the turf is inserted into the pillars 222, 224, 226 of each upper mat 200, and then the upper mats 200 are placed on the upper surface of the lower mat 100 so as to alternate with the lower mat 100. In this process, the turf is laid on the upper surfaces of the lower mats 100, and thereafter, the columns 222, 224, and 226 of the upper mat 200 may be placed on the upper surface of the lower mat 100 while passing through the turf.

When the installation of the upper mats 200 is completed, the installation of the double mat is completed by simultaneously fixing the upper mats 200 and the lower mats 100 with a plurality of pegs.

<modification example>

Hereinafter, a modified example of the guiders 132 and 134 of the lower mat 100 and a modified example of the upper mat 200 due thereto will be described with reference to FIGS. 9 to 12.

Corner grooves 132a may be provided in the center guider 132 of the lower mat 100 as shown in FIG. 9. The upper corner groove 132a is provided to extend vertically from the corner of the central guider 132, and as shown in FIG. 9, a connecting plate 132b connecting two plates of the central guider 132 adjacent to each other is provided. Can be formed. At this time, the upper end of the connection plate 132b is positioned lower than the upper end of the center guider 132 as shown in FIG. 9, and the height difference between the two upper ends is set to the thickness of the rim 212 of the upper mat frame. .

The upper edge grooves 132a are provided in an appropriate number according to the cross-sectional shape of the central guider 132. For example, if the central guider 132 has a "T"-shaped cross section as shown in FIG. 9, two corner grooves 132a are provided. Although not shown, when the central guide 132 has a "+"-shaped cross section, four corner grooves 132a are provided.

As shown in FIG. 9, since the connecting plate 132b is in a flat shape, the corner groove 132a has a triangular shape, but the shape of the corner groove 132a may also be changed according to the shape of the connecting plate 132b. Of course.

The upper edge groove 132a and the connection plate 132b may also be provided on the side guider 134 of the lower mat 100 as shown in FIG. 10. In this case, the side guider 134 has a "b"-shaped cross-section as shown in FIG. 10, and the central guider 132 has a "T"-shaped cross-section. And as shown in Figure 12, the side guider 134 having a "L"-shaped cross section is located only at both ends of the central guider 132 in the horizontal direction, and the bending direction of the central guider 132 having a "T"-shaped cross-section It bends in the opposite direction to.

On the other hand, when the guiders 132 and 134 of the lower mat 100 are provided with the corner grooves 132a as described above, they are inserted into the upper corner grooves 132a in the upper mat 200 as shown in FIG. 11. Fastening pillars 228 for are provided. And, as shown in Fig. 12, a double mat is installed so that three upper mats 200 are worn on one lower mat 100 (only two upper mats 200 are shown in Fig. 12).

According to this modification, the coupling between the neighboring lower mats 100 is provided by the lower plate fastening hole 146a and the lower plate fastening hole 146b provided in the lower mat 100, and the neighboring lower mats 100 It may also be provided by an upper mat 200 that is placed to span over. In addition, since the work of installing the upper mat 200 on the lower mat 100 is very convenient, workability is improved.

As described above, although the present invention has been described by a limited embodiment and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations may be made within the equivalent range of the claims to be described, and the above-described embodiments may be variously combined.

100: lower mat 102: grass through hole
112: lower mat border 122: protrusion
122a: opening 132: center guider
132a: corner groove 132b: connecting plate
134: side guider 142: bell rib
144: transverse rib 146a: lower plate fastener
146b: Lower plate fastening work
200: upper mat 202: grass through hole
210: frame 212: frame border
214: seating groove 222: main pillar
224: strength reinforcement column 226: load distribution column
228: fastening pillar

Claims (19)

A plurality of lower mats provided on the ground having grass passage holes, provided with insertion grooves on an upper surface, provided to cover the ground without a separation from the ground, and arranged adjacent to each other before laying the turf; And
It has grass passage holes, and after the lower mats are installed on the ground, it is placed on the upper surface of the lower mats while forming a space for the turf to be located above the lower mats, and on a part of each of the adjacent lower mats. Including; a plurality of upper mats arranged adjacent to each other while positioned one by one so as to span,
Each top mat,
A frame having the grass passage holes; And
Including; columns extending downward from the lower surface of the frame and having a lower end placed on the upper surface of the adjacent lower mats,
The pillars of each of the upper mats,
Main pillars having a lower end inserted into some insertion grooves of each of the adjacent lower mats; And
Including; strength reinforcing pillars arranged apart from each other along the rim of the frame and having a lower end placed at a portion of the upper surface of the adjacent lower mats where the insertion grooves are not provided; and
A guider protruding upward is provided on the upper surface of the lower mat to prevent the frames of adjacent upper mats from moving in the horizontal direction,
The guider,
A central guider positioned at the center of the lower mat; And
Side guiders positioned on both sides in the horizontal direction, on both sides in the vertical direction, or on both sides in the horizontal direction and on both sides in the vertical direction around the center guider; delete delete The method of claim 1,
Each of the insertion grooves is provided in a form surrounded by a protrusion protruding upward from the upper surface of the lower mat. The method of claim 1,
Each of the insertion grooves is provided in a form of being dug downward from the upper surface of the lower mat to a depth less than the thickness of the lower mat. The method according to claim 4 or 5,
Each of the insertion grooves is provided to have an opening portion opened toward the grass passage holes positioned around the turf protection double mat. delete delete delete The method of claim 1,
The central guider has a corner formed with a corner groove extending in the vertical direction, and the frame of the upper mat is provided in a form extending downward and a fastening column inserted into the corner groove is provided. delete The method of claim 1,
The pillars of each of the upper mats,
And load distribution pillars arranged along the adjacent boundary of the adjacent lower mats and in contact with the upper surfaces of both lower mats of the adjacent boundary. The method of claim 1,
The upper mats and the lower mats are fixed to the ground by a plurality of fixing means stuck to the ground while pressing the frame down, a double mat for lawn protection. The method of claim 13,
The fixing means is a double mat for lawn protection consisting of a "c" shaped peck. The method of claim 14,
A double mat for lawn protection provided with a plurality of seating grooves for seating the upper end of the peck on the upper surface of the frame. The method of claim 13,
Some of the plurality of fixing means is a double mat for protecting the turf simultaneously pressing the edges of the two adjacent upper mats. The method of claim 1,
A double mat for lawn protection provided on a lower surface of the lower mat so as to form a grid with a plurality of ribs to be located in the ground. The method of claim 17,
The rib extends from one rim of the lower mat toward the rim on the opposite side, and at one end of the rib, a lower plate fastening hole protruding upward from the outside of the one rim is provided, and is located between the opposite end of the rib and the opposite rim. A double mat for lawn protection provided with a lower plate fastening hole of the same shape as the lower plate fastening hole at the portion of the lower mat. The method of claim 17,
The underside of the rib is a double mat for lawn protection provided in the form of an arch.

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