JP2019210646A - Mat made of rubber chip and method of placing mat made of rubber chip - Google Patents

Abstract

To provide a mat made of a rubber chip configured such that edges of the mats made of rubber chip can be placed to be butted to each other without steps when four pieces of the mats made of rubber chip having a predetermined size are placed in an optional place such as walk surface, anti-grass surface, and simply paved surface.SOLUTION: Four pieces of mats made of rubber chips 1A to 1D are arrayed in any direction and placed such that adjacent mats 1 made of rubber chips become two sides. A first placement edge part 4a of the first mat 1A and a second placement edge part 4b of the third mat 1C on a diagonal line are butted, and placed so as to be at the height with a projection step 3a, a pair of the second mat 1B and the fourth mat 1D placed by turning back and positioned on a diagonal line are also placed in a similar manner, and are placed to be the height with a mat body 2 at a portion where these edge parts 4 are superposed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rubber chip mat to be laid on a walking surface, a grassproof surface, a simple pavement surface, and the like, and a method for laying the rubber chip mat.

  A mat is often laid on a walking surface, a weedproof surface, a simple pavement surface, etc. to prevent slipping, cushioning, and weeds. For example, as Patent Document 1, a preliminarily molded elastic pavement plate is laid on a floor surface to be paved such as a passage, and an elastic pavement material in which an adhesive is mixed with a rubber chip is poured onto the elastic pavement plate, A method is known in which a rubber chip raw material layer is formed by laminating only a thickness, the rubber chip raw material layer is pressure-cured by a heating roll, and a rubber chip layer is laminated on the elastic pavement plate.

  In addition, a roll of rubber mat wound with a certain width can be extended and laid on site and appropriately cut, or a product manufactured in advance to a certain size can be transported to the site and laid and bonded appropriately. It has been broken.

  For example, as Patent Document 2, as an elastic mat that is lightweight and excellent in cushioning properties, it is a molded product made of fiber rubber having a length and width of about 500 mm and a wall thickness of about 50 mm, and the bottom portion has a length and width of 30 to 40 mm. A large number of cavities having a depth of 20 to 30 mm are drilled in a predetermined order, and about half of each side of the bottom surface protrudes about 20 to 30 mm in thickness, and the rest is cut out inward by 20 to 30 mm. There is known a mat in which key-like bodies are formed in a staggered relationship and can be connected in the front-rear and left-right directions via the key-like bodies.

  Further, as Patent Document 3, a rubber chip mat provided with a rubber mat body is laid on a road slope or the like to prevent weed propagation. A ridge for scaffolding is provided at one end in a direction perpendicular to the direction in which the mat bodies are arranged, so that the operator can safely perform weeding work on the rubber chip mat. In Patent Document 3, the mat body is further provided with overlapping portions formed in opposite step shapes at both ends in the arrangement direction.

JP 2007-268804 A Registered Utility Model No. 3019168 JP 2007-107353 A

  In Patent Document 1, since an elastic pavement raw material in which an adhesive is mixed with a rubber chip is poured onto an elastic pavement plate to form a rubber chip raw material layer and the rubber chip raw material layer is pressure-cured with a heating roll in the field. In addition, it is very troublesome and time consuming.

  In Patent Document 2, when four elastic mats are laid on the top, bottom, left, and right, the portions where the edge portions of the four elastic mats abut each other are portions having a thickness of only the upper half of the four elastic mats. In addition, the hollow portions of the lower half come into contact with each other. As a result, the thickness of the edge portions of the four elastic mats is halved, and the four edge portions become hollow portions on the lower side. There is a possibility that you will be caught in the place where you do. Moreover, even when laid, the edge portion may be recessed and not be a flat surface. There is a possibility that a gap will be formed in the combined portion of the edge portions of the rubber chip mat, resulting in a poor appearance.

  In Patent Document 3, the mats of rubber chip mats can be laid without gaps in the overlapping direction of the mats of rubber chips, but in the direction perpendicular to the mat body, the mats of rubber chips There will be a gap in the screen and the appearance will deteriorate.

  The present invention has been made in view of such points, and its purpose is to lay four rubber chip mats of a predetermined size in the front, rear, left, and right directions at any place such as a walking surface, a weedproof surface, and a simple pavement surface. In the case of laying, the edges of the rubber chip mats can be laid so as to face each other without any step.

  In the present invention, in which four rubber rubber mats are laid in the front, rear, left and right directions, the edge portions of a pair of rubber chip mats can be butted against each other with the front and back sides of adjacent rubber chip mats reversed. In addition, the edge portions of a pair of rubber chip mats in another set can be brought into contact with each other, and the edge portions of the four rubber chip mats can be laid flush with the mat body without any step.

  Specifically, according to a first aspect of the present invention, there is provided a rubber chip mat laid on a laying surface, comprising a plurality of rubber mat body portions formed in a rectangular plate shape, and having four sides of the mat body portion. A rectangular protruding step portion formed integrally with the side edge at a half height of the mat main body portion and projecting outward in the width direction with a predetermined width is formed on the surface side of the protruding step portion. A step portion comprising a rectangular concave step portion is provided, and when the four rubber chip mats are arranged side by side in the front, rear, left and right directions, and adjacent rubber chip mats are laid so that they face each other, they are laid face up. A first laying edge portion is provided at an edge portion of the protruding step portion of one set of the rubber chip mats located on a pair of diagonal lines, and an edge portion of the protruding step portion of the other rubber chip mat is provided Butt against the first laying edge 2 laying edge portions are provided, and the laid first edge portion and the second laying edge portion are provided so as to be flush with the protruding stepped portion. A third laying edge portion is also provided at the edge portion of the protruding step portion of one of the rubber chip mats, and the other edge portion of the rubber chip mat of another set positioned on the diagonal line. A fourth laying edge portion that abuts against the third laying edge portion is provided at an edge portion of the protruding step portion of the rubber chip mat, and the laid third and fourth laying edge portions and the fourth laying are provided. A padding edge portion is provided so as to be flush with the protruding stepped portion, and the first padding edge portion and the second padding edge portion of a pair of rubber chip mats are paired with each other. A pair of the rubber chip mats of the above-mentioned rubber chip mats turned upside down 3 laying edge portions and the 4th laying edge portion of the rubber chip mat are in contact with each other, and the edge portions overlap each other so that the mat body portion is flush with the mating body portion. It is characterized by.

  In the first invention, a first laying edge portion is provided at an edge portion of the protruding step portion of one rubber chip mat of two rubber chip mats positioned on a pair of diagonal lines, and the other rubber chip made Since the second laying edge portion is provided at the edge portion of the protruding step portion of the mat, when two rubber chip mats located on a pair of diagonal lines are laid, When the two mating edge portions are butted and laid, the pair of rubber chip mats which are flush with the protruding stepped portion and are laid upside down are also connected to the second mating edge portion and the second mating edge portion. Since the height is flush with the projecting stepped portion by laying in contact with one laying edge portion, when the stepped portions 3 of the four rubber chip mats are stacked, the stacked stepped portions 3 Can be laid at the same height as the mat body 2.

  The “protruding step portion having a half height of the mat main body portion” used in the present invention includes substantially half the height. For example, depending on the size of the rubber chip, the outer periphery of the rubber chip mat is not limited to a clean smooth surface, and the rubber chip may partially protrude or be uneven. Therefore, the height of the protruding step portion may be slightly lower than the half height, and this case is also included.

  According to a second aspect of the present invention, in the first aspect, the second padding edge portion of the pair of other rubber chip mats is formed in a right-angled projecting portion having a square angle. The first mating edge portion of the rubber chip mat is formed in an L-shaped dent portion formed of an L-shaped outer edge so as to abut against the right-angle protruding portion.

  In the second invention, since the edge portion of one rubber chip mat is provided in the L-shaped dent portion, and the right angle protrusion portion that abuts the right angle protrusion portion of the other rubber chip mat edge, The two protruding portions of the rubber chip mat positioned on a pair of diagonal lines can be laid so that they do not overlap in the vertical direction and are in close contact with each other.

  According to a third invention, in the second invention, all of the four rubber chip mats laid in the front, rear, left, and right have the same shape, and are positioned at one diagonal line of the four edge portions of each of the rubber chip mats. The two edge portions are formed of the L-shaped dent portions, and the two edge portions located on the other diagonal line are formed of the right-angle protruding portions.

  In the third invention, all four rubber chip mats can be formed into the same shape, and when laying back and forth and right and left, the back and front and front and back and left and right directions are simply laid and the edges of the four rubber chip mats are formed. Since it can be laid by butting the right-angled projecting portion and the L-shaped dent portion, it can be laid with the same height as the mat main body portion and in close contact with each other.

  According to a fourth aspect of the present invention, in the first aspect, the first padding edge portion and the second padding edge portion of a pair of the rubber chip mats are both inclined such that the inclined surfaces are outer edges. It is formed in the edge part, It is characterized by the fact that these inclined surfaces mutually face and are laid.

  According to a fourth aspect of the present invention, the first laying edge portion and the second laying edge portion of one of the pair of rubber chip mats are both formed at an inclined edge portion whose inclined surface is an outer edge. Therefore, the inclined surfaces of the inclined edge portions of the protruding stepped portions of the two rubber chip mats positioned on a pair of diagonal lines can be laid and laid.

  According to a fifth invention, in the fourth invention, the rubber chip mat includes the inclined edge portions at four edge portions, and the inclined surfaces of the inclined edge portions can be laid to face each other. It is characterized by that.

  In the fifth invention, the four rubber chip mats can be formed in the same shape, and when laying back and forth, right and left, just confirming the back and front direction, the part where the edges of the four rubber chip mats overlap is bulky. It can be laid without overlapping and in close contact with each other. And, the inclined surfaces of the inclined edge portions of one pair of the rubber chip mats and the inclined surfaces of the inclined edge portions of another pair of the rubber chip mats are laid at right angles, A gap directly connected to the laying surface is such that the inclined surfaces intersect each other, and the laying surface on which the rubber chip mat is laid is the only part that can be seen from the upper surface of the laid rubber chip mat. As a result, it has excellent sealing properties and a great appearance.

  According to a sixth aspect of the present invention, in the method of laying a rubber chip mat laid on a laying surface, the rubber chip mat is formed in a rectangular plate shape, and a plurality of rubber mat main body portions and four sides of the mat main body portion. A rectangular protruding step portion formed integrally with the side edge at a half height of the mat main body portion and projecting outward in the width direction with a predetermined width is formed on the surface side of the protruding step portion. When the four rubber chip mats are arranged side by side in the front-rear and left-right directions, and adjacent rubber chip mats are laid on the front and back, they are laid face-up. A first laying edge portion provided at an edge portion of the protruding step portion of one set of the rubber chip mats located on a pair of diagonal lines, and an edge of the protruding step portion of the other rubber chip mat 2nd laying edge provided in the section Are placed so as to be flush with the protruding step portion, and the rubber chip mat located on another pair of diagonal lines is faced down, and the protruding step of one of the rubber chip mats The third laying edge portion provided at the edge portion of the portion and the fourth laying edge portion provided at the edge portion of the protruding step portion of the other rubber chip mat are flush with the protruding step portion. The projecting portion of the stepped portion of the rubber chip mat facing down overlaps the concave stepped portion of the stepped portion of the rubber chip mat facing up, and is laid face down. The rubber chip mat is laid so that the protruding step part of the step part of the rubber chip mat facing up overlaps the concave step part of the step part of the rubber chip mat, and the edge parts of the four rubber chip mats protrude. Lay the mating part flush with the mat body It is characterized in.

  In the sixth aspect of the invention, a pair of rubber chip mats are laid face-to-face with the first and second mating edge portions facing each other, the other pair of rubber chip mats are turned over, The protruding step portion and the recessed step portion of the stepped portion of the pair of rubber chip mats made of a pair of rubber chips mated with each other of the three padding edge portions and the fourth padding edge portion are made of another pair of rubber chips. The mat can be laid so as to overlap the concave stepped portion and the protruding stepped portion of the stepped portion, and four rubber chip mats can be laid without gaps and without unevenness.

  According to a seventh aspect of the present invention, in the laying method of the rubber chip mat laid on the laying surface, the rubber chip mat includes a plurality of rubber mat main bodies formed in a rectangular plate shape, and four sides of the mat main body. A rectangular protruding step portion formed integrally with the side edge at a half height of the mat main body portion and projecting outward in the width direction with a predetermined width is formed on the surface side of the protruding step portion. A stepped portion comprising a rectangular concave stepped portion, and the four rubber chip mats are arranged side by side in the front-rear and left-right directions, and the rubber chip mats located on a pair of diagonal lines are laid face-up. One set of a pair of the above rubber chip mats is cut with a cutter at any part where the edge portions of the rubber chip mat overlap in the vertical direction, and the separated cut pieces are removed. A pair of rubber chip mats The rubber chip mat positioned on a pair of diagonal lines is laid face down, and the edge of one of the other pair of rubber chip mats overlaps in the vertical direction. Cut an arbitrary portion with a cutter, remove the separated cut pieces, use the cut surface as the outer peripheral surface, abut the edges of a pair of rubber chip mats in another set, and the rubber chip mat facing up The protruding stepped portion of the stepped portion of the rubber chip mat facing backward overlaps the recessed stepped portion of the stepped portion, and the concave stepped portion of the stepped portion of the rubber chip mat facing backward is faced to the concave stepped portion. The rubber chip mat is laid so that the protruding step portions of the stepped portions overlap each other, and a portion where the edge portions of the four rubber chip mats abut each other is laid flush with the mat body portion.

  In the seventh invention, after laying a pair of mats made of rubber chips, at the laid site, the overlapping portion of the edge portion is cut and butted, so depending on the fine unevenness and inclined state of the laid surface at the site It is possible to cut at an arbitrary part and lay it face to face.

  As described above, according to the rubber chip mat of the present invention, when four rubber chip mats are laid in the front, rear, left and right, the side edges of the rubber chip mat are laid in the vertical direction at the stepped portion, A portion where the rubber chip mats are mated can be flush with the mat body, and a portion where the rubber chip mats are mated is excellent in sealing performance.

FIG. 1 is a perspective view of two rubber chip mats according to Embodiment 1 of the present invention. FIG. 2 is a plan view for explaining a state in which four rubber chip mats according to the first embodiment of the present invention are laid. FIG. 3 is a plan view showing a state where the four rubber chip mats of FIG. 2 are laid. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3, FIG. 4B is a cross-sectional view taken along the line V-V, and FIG. 4C is a cross-sectional view taken along the line VI-VI. . FIG. 5 is a perspective view of one rubber chip mat according to the second embodiment of the present invention. FIG. 6 is a view corresponding to FIG. 2 showing Embodiment 2 of the present invention. FIG. 7 is a view corresponding to FIG. 3 showing Embodiment 2 of the present invention. FIG. 8 is a perspective view of one rubber chip mat according to Embodiment 3 of the present invention. FIG. 9 is a diagram for explaining a state where two rubber chip mats are laid according to the third embodiment of the present invention. FIG. 10 is a diagram for explaining a state in which a state of further laying is advanced from the state of FIG. FIG. 11 is a diagram illustrating a state in which the state of further laying is advanced from the state of FIG. FIG. 12 is a view corresponding to FIG. 3 showing Embodiment 3 of the present invention. FIG. 13 is a view corresponding to FIG. 9 showing Embodiment 4 of the present invention. FIG. 14 is a view corresponding to FIG. 10 showing Embodiment 4 of the present invention. FIG. 15 is a view corresponding to FIG. 11 showing Embodiment 4 of the present invention. FIG. 16 is a view corresponding to FIG. 12 showing Embodiment 4 of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.

(Embodiment 1)
The first embodiment of the present invention will be described with reference to FIGS. The rubber chip mat 1 is a rubber mat having a rectangular shape that is laid on a laying surface for the purpose of cushioning, anti-slip, water permeability, herbicidal properties, design, barrier free, playground safety measures, and the like. The “laying surface” used in the present invention is a surface on which a mat is laid for the above purpose, such as a walking surface such as a sidewalk, a promenade, and a passage, a passage, a road, a site and a slope for grass protection, , Including parks, trees, buildings, amusement parks, athletics fields, exhibition halls, event venues, gymnasiums, restaurants, stations, hospitals, laundromats, etc.

  The plurality of mats made of rubber chips 1 are laid on the laying surface (not shown) described above without any gaps. In the following description, a case where two and four pieces are laid will be described as an example.

  As shown in FIG. 1, the rubber chip mat 1 has a mat body portion 2 formed in a rectangular plate shape and four side edges of the mat body portion 2 at about half the height of the mat body portion 2. And a stepped portion 3 that protrudes outward in the width direction with a predetermined width and is integrally formed. The step portion 3 includes a rectangular protruding step portion 3a and a rectangular concave step portion 3b formed on the surface side of the protruding step portion 3a. A portion where two adjacent protruding step portions 3 a meet at a right angle and the corners are squared is called an edge portion 4.

  As shown in FIG. 3, in the four rubber chip mats 1 laid on the front, rear, left and right, for convenience of explanation, the upper left is the first rubber chip mat 1A, and the lower left first rubber chip mat 1A is the first. 2 rubber chip mat 1B, the right side of which is a third rubber chip mat 1C, and the top is a fourth rubber chip mat 1D. In the four rubber chip mats 1, a pair of rubber chip mats located on a diagonal line is a first rubber chip mat 1 </ b> A and a third rubber chip mat 1 </ b> C. The mat will be described below by using the second rubber chip mat 1B and the fourth rubber chip mat 1D.

  In the pair of rubber chip mats 1, the first rubber chip mat 1 </ b> A is one rubber chip mat, and the third rubber chip mat 1 </ b> C is the other rubber chip mat. The mat body portions of the first rubber chip mat 1A, the second rubber chip mat 1B, the third rubber chip mat 1C, and the fourth rubber chip mat 1D are referred to as mat body portions 2A, 2B, 2C, and 2D, respectively.

  The length of the rectangular shape of the rubber chip mat 1 is not particularly limited. For example, a rubber chip having a length of about 300 mm to 1500 mm is easy to manufacture. In addition, considering ease of carrying, in the first embodiment, it is assumed to be about 900 mm × 900 mm. The term “about 900 mm × 900 mm” is expressed as “about 900 mm” because a rubber chip of a predetermined size is randomly exposed from the surroundings or partially chipped, and an accurate dimension cannot be set. did. In the following description, the expression “about” has the same meaning.

  Although the thickness of the mat body 2 of the rubber chip mat 1 can be set as appropriate, a thickness of, for example, about 5 mm to 30 mm is easy to use from the viewpoint of the sealing function and durability. In the first embodiment, for example, the thickness of the mat body 2 is about 10 mm. Further, the height of the protruding step portion 3a of the stepped portion 3 is about 4.5 mm, which is almost half the height of the mat main body portion 2, and the height of the recessed step portion 3b is about 5.5 mm. Since the rubber chip is included on the surface of the protruding step portion 3a of the rubber chip mat 1, a slight unevenness is observed. Therefore, when the height of the protruding step portion 3a of the stepped portion 3 and the height of the recessed step portion 3b are overlapped with the same 5 mm, the protruding portions of the uneven surfaces of the protruding step portion 3a may come into contact with each other. In that case, there is a possibility of a little excitement. In order to prevent this, it is preferable to make the height of the protruding step portion 3a slightly lower than the height of the recessed step portion 3b. In the first embodiment, the height of the protruding step portion 3a is about 4.5 mm, the height of the concave step portion 3b is about 5.5 mm, and a difference of 1 mm is provided. In addition, since the height of the unevenness varies depending on the particle size of the rubber chip, the height may be set so as to absorb the height of the unevenness, and is not limited to the above height.

  The width of the protruding step portion 3a is to ensure the sealing property of the edge portion 4 that is overlapped at different steps. As will be described later, it is preferable to lay the rubber chip mat 1 on a flat laying surface or the like without a gap. . The width of the protruding step 3a is preferably 30 mm to 100 mm, although it depends on the size of the rubber chip mat 1. In the first embodiment, for example, about 50 mm. As a result, the width of the mat body 2 was set to about 800 mm × 800 mm.

  The rubber chip mat 1 can use natural rubber or various synthetic rubber chips. For example, the rubber chip is manufactured by a manufacturing method in which raw materials are put into a pressure kneader, mixed, extruded into a sheet, vulcanized, and finely pulverized with a pulverizer. Therefore, the particle size is quite large and varies, and is not a constant size. However, in rubber chips such as EPDM, the particle size of the rubber chip is 0.5 mm to 10 mm, especially about 1 to 8 mm. It is preferable to use those.

  In the first embodiment, for example, a rubber chip such as EPDM is used as an aggregate, and the rubber chip is bonded with a binder such as urethane resin to form a mixture of a rubber chip and a binder. The rubber chip mat 1 exhibits elasticity and anti-slip function, has water permeability, and has light shielding properties. Moreover, when using color chips, such as a color rubber chip, it can be set as the laying surface rich in color.

  Here, various types of rubber chips can be used, but waste tires can be crushed. In this case, it is possible to reduce the manufacturing cost of the rubber chip mat 1 and to reduce the environmental load due to the recycled material.

  Various binders can be used. For example, a urethane resin can be used. The binder is preferably a rubber chip having high adhesiveness. Moreover, the maintenance cost of the rubber chip mat 1 is preferably reduced by making the binder excellent in weather resistance.

  The volume percentage of rubber chips in the rubber chip mat 1 may be about 60 to 90%.

  In particular, since the rubber chip mat 1 of the present invention includes a rubber chip, the surface has fine irregularities and exhibits an anti-slip function. Furthermore, since the rubber chip mat has water permeability, water does not remain on the surface or become a puddle. In addition, since it contains a rubber chip, it is highly elastic.

  The manufacturing method of the rubber chip mat 1 will be briefly described. First, waste tires are pulverized into chips, and a large number of rubber chips and a binder are mixed in a mixer. At this time, various additives and additives may be mixed. The rubber chip mat 1 can be manufactured by pouring and molding a mixture of a rubber chip and a binder into a mold prepared in advance.

  By doing so, the manufacturing cost of the rubber chip mat 1 can be reduced, and the environmental load can be reduced by recycling (reuse of waste tires).

  FIG. 1 shows two rubber-made first rubber chip mats 1A and third rubber chip mats 1C having the same shape. In addition, with respect to one 1st rubber chip mat 1A, two sheets of the 3rd rubber chip mat 1C rotated 90 degree | times and changed direction are shown on a diagonal line (up-down direction in FIG. 1). As will be described later, when four rubber chip mats 1 are laid on the laying surface (not shown), the two first rubber chip mats 1A and the third rubber chip mat 1C are laid diagonally.

  In general, the plurality of rubber chip mats 1 are not only two or four laid on a wide laying surface, but are further laid with rubber chip mats 1 around the four rubber chip mats 1. In the first embodiment, a method for laying two rubber chip mats 1 and a method for laying four rubber chip mats 1 will be described with reference to FIGS. 2 and 3.

  In one set of a pair of rubber chip mats 1, four edge portions 4 of the first rubber chip mat 1 </ b> A are provided with first laying edge portions 4 a at the upper left edge portion 4 and the lower right edge portion 4, A second padding edge portion 4b that abuts the first padding edge portion 4a is provided on the lower left edge portion 4 and the upper right edge portion 4 of the edge portion 4 of the first rubber chip mat 1A.

  Specifically, the second laying edge portion 4b is formed in a first right-angle protruding portion 40b in which adjacent protruding step portions 3a and 3a meet at a right angle while maintaining a predetermined width between each other, and the corners are squared. The first laying edge portion 4a butts against the first right-angle protruding portion 40b so that the rectangular portions, which are predetermined width portions where the adjacent protruding step portions 3a and 3a meet at a right angle, are removed from each other. It is formed in the 1st L-shaped dent part 40a which consists of an L-shaped outer edge.

  The third rubber chip mat 1C has the same shape as the first rubber chip mat 1A. As shown in FIGS. 1 and 2, the first rubber chip mat 1C is rotated 90 degrees with respect to the first rubber chip mat 1A. It is arranged on a diagonal line with the mat 1A. 1C and 2, the third rubber chip mat 1C includes a first laying edge portion 4a on the lower left and upper right edge portions, that is, a first L-shaped recess portion 40a, and an upper left and lower right edge portion. A second laying edge portion 4b that faces the first laying edge portion 4a, that is, a first right angle protruding portion 40b is provided.

  As shown in FIGS. 1 and 2, the first rubber chip mat 1A and the third rubber chip mat 1C are formed in the first L-shaped recess 40a on the lower right side of the first rubber chip mat 1A. The 1st right-angle protrusion part 40b of 1C upper left is faced | matched and can be laid.

  In another pair of rubber chip mats, as shown in FIG. 2, in the four edge portions 4 of the second rubber chip mat 1B turned upside down, the third padding is provided at the upper right edge portion and the lower left edge portion. An edge portion 4c is provided, and a fourth laying edge portion 4d that abuts the third laying edge portion 4c is provided at the lower right edge portion and the upper left edge portion of the edge portion 4 of the second rubber chip mat 1B. ing. The 3rd padding edge part 4c and the 4th padding edge part 4d are respectively the same as the 1st L-shaped recessed part 40a of the 1st padding edge part 4a, and the 1st right angle protrusion part 40b of the 2nd padding edge part 4b. Shape.

  The fourth rubber chip mat 1D has the same shape as the second rubber chip mat 1B, and the fourth rubber chip mat 1D has the same third shape edge portion 4c and the second shape as the second rubber chip mat 1B. Four padding edge portions 4d are provided. In the case of laying, as shown in FIG. 2, the fourth rubber chip mat 1D is rotated 90 degrees with respect to the second rubber chip mat 1B and is brought into contact with the second rubber chip mat 1B. ing.

  A laying method for laying the four rubber chip mats 1 on both sides will be described with reference to FIGS. As shown in FIG. 1, two first rubber chip mats 1A and 1C rubber chip mats 1C located on a pair of diagonal lines are turned 90 ° from each other and face each other diagonally. Prepare. Then, as shown in FIG. 2, the first L-shaped recessed portion 40a of the first rubber chip mat 1A and the first right-angle protruding portion 40b of the third rubber chip mat 1C are laid on the laying surface. . Then, the two second rubber chip mats 1B and 4D rubber chip mats 1D positioned on a pair of diagonal lines are turned over, and the first L-shaped recess 40a and the fourth rubber chip of the second rubber chip mat 1B are turned over. The mat 1D is laid so as to face the first right-angle protruding portion 40b. By this laying, as shown in FIG. 3, another set of the second rubber chip 1A and the third rubber chip mat 1C on the concave step portion 3b on the protruding step portion 3a of the pair of second rubber chip mats 1A and 1C. The protruding step portions 3a of the rubber chip mat 1B and the fourth rubber chip mat 1D are overlapped, and a pair of first pair of second rubber chips 1B and a concave step portion 3b of the fourth rubber chip mat 1D are provided. The protruding step portions 3a of the 1 rubber chip mat 1A and the third rubber chip mat 1C overlap to be flush with the height of the mat body 2. FIG. 4 shows a cross-sectional view of a portion where the step portions 3 of the four rubber chip mats 1A, 1B, 1C, 1D overlap. In FIG. 4, a gap of 1 mm is theoretically formed at the portion where the stepped portion 3 overlaps, but in reality, since the overlapping gap is not clear due to the unevenness of the rubber chip, FIG. 4 shows no gap.

  As shown in FIG. 4A, the step portion 3 between the first rubber chip mat 1A and the fourth rubber chip mat 11D overlaps with each other. In other words, the protruding step 3a of the fourth rubber chip mat 1D is laid on the mat body 2A of the first rubber chip mat 1A in a flush manner. Similarly to the first rubber chip mat 1A and the fourth rubber chip mat 1D, the step portion 3 between the second rubber chip mat 1B and the third rubber chip mat 1C is stepped as shown in FIG. Overlapping, the protruding step 3a of the second rubber chip mat 1B is laid on the mat body 2C of the third rubber chip mat 1C in a flush manner. In addition, since the thickness of the protruding step portion 3a is 4.5 mm and the thickness of the concave step portion 3b is 5.5 mm, the portion where the protruding step portion 3a overlaps vertically is 1 mm between the protruding step portions 3a. Although there is a gap, the protruding step portion 3a that overlaps the upper side fits in almost the same height as the mat main body portion 2 of the other rubber chip mat 1, so that there is no problem in appearance. Since the uneven surfaces of the rubber chips included in the mat 1 are overlapped, the protruding step 3a that overlaps the upper side does not protrude from the mat main body 2 of the other rubber chip mat 1 and is therefore visually advantageous.

  As described above, the step portions 3 of the four rubber chip mats 1A, 1B, 1C, and 1D are stepped and overlapped with each other, so that the sealing performance of the edge portion 4 is excellent. The “sealing property of the edge portion” in the present invention means that the protruding step portions 3a of the rubber chip mats 1 are stepped from each other when viewed from the upper surface of the laid rubber chip mat 1, and the edges of each other It means a state where the laying surface on which the rubber chip mat 1 is laid is covered from the portion where the portion 4 is abutted so as to be hardly visible.

  Further, at the portion where the edge portions 4 of the four rubber chip mats 1A, 1B, 1C, 1D overlap, as shown in FIG. 4B, the protruding step portions 3a of the pair of first rubber chip mats 1A. The first L-shaped recessed portion 40a and the first right-angle protruding portion 40b of the protruding step portion 3a of the third rubber chip mat 1C face each other and are laid with almost no gap at almost half the height of the mat body portion 2. ing. Further, the first L-shaped recessed portion 40a of the second rubber chip mat 1B, which is laid overside down, and the first right-angle protruding portion 40b of the fourth rubber chip mat 1D face each other, so that the mat body 2 is substantially At half the height, it is laid with almost no gaps. As a result, at the portion where the edge portions 4 of the four rubber chip mats 1A, 1B, 1C, 1D overlap, the mat body portion 2 is substantially flush with the height.

  As described above, in the first embodiment, when the four rubber chip mats 1A, 1B, 1C, 1D are laid on the front, rear, left and right, the side edges of the rubber chip mat 1 are overlapped in the vertical direction at the step portion 3. Since it is laid, the step part 3 which is the mating part of the rubber chip mats 1 can be overlapped with the mat main body part 2 and the thickness of the part where the step part 3 of the rubber chip mats abuts can be set to the mat main body part. 2 which is almost the same height and level as 2.

  Further, at the boundary portion when the rubber chip mat 1 is laid, that is, for example, at the portion where the protruding step portion 3a of the rubber chip mat 1B overlaps the protruding step portion 3a of the rubber chip mat 1A, the concave step of the rubber chip mat 1A is formed. Since the inner edge line of the portion 3b and the outer edge line of the protruding step portion 3a of the rubber chip mat 1B come into contact with each other in a straight line, if there is a gap between these boundary portions, The line may stand out. In order to make this inconspicuous, at least one of the inner edge line of the recessed step portion 3b and the outer edge line of the protruding step portion 3a is made to have a surface roughness on which the unevenness of the rubber chip is randomly exposed, or a consciously uneven line. You may shape | mold so that it may become.

  In addition, at the edge portions of the four rubber chip mats 1A, 1B, 1C, 1D, the first L-shaped recess 40a of the pair of first rubber chip mats 1A and the first right-angle protruding portion of the third rubber chip mat 1C. The portion that is in contact with 40b and is connected to the laying surface is one side of the first L-shaped recess 40a. When this one side is sealed, a caulking agent, an adhesive, or a sealing material may be applied and joined. In this case, the rubber chip mat may be expanded and contracted without embedding the sealing material in the other portions. By doing so, even if the rubber chip mat expands and contracts due to a temperature difference between daytime and nighttime, it can be sealed without leaving a gap. In particular, the first rubber chip mat 1A, the second rubber chip mat 1B, the third rubber chip mat 1C, and the fourth rubber chip mat 1D may have the same shape, which is excellent in mass productivity.

  Further, by simply laying the rubber chip mat 1, the rubber chip mat 1 can be laid so that the mating portions that are the edge portions 4 of the rubber chip mat 1 have the same thickness as the mat body portion, so that the appearance is beautiful. You can get something that is easy to walk with. Further, since the rubber chip mat 1 includes a rubber chip, it has cushioning properties and is difficult to slip. It also has excellent soundproofing and vibration isolation performance.

  For example, if it is a part where weeds inhabit, such as a passage part of a park, the sealing property can be obtained by laying the rubber chip mat 1 and the growth of weeds can be prevented. Moreover, germination and growth of weeds are prevented by having light shielding properties.

(Embodiment 2)
The second embodiment will be described with reference to FIGS. In the second embodiment, only parts different from the first embodiment will be described, and the description will be simplified.

  The second embodiment differs from the first embodiment in the shape of the edge portions 4 of the four rubber chip mats 11A, 11B, 11C, and 11D. In the second embodiment, the first padding edge portion 41a, the second padding edge portion 41b, the third padding edge portion 41c, and the fourth padding edge portion 41d are the first padding edge portion 4a of the first embodiment, The second laying edge portion 4b, the third laying edge portion 4c, and the fourth laying edge portion 4d have different shapes. Specifically, the first laid edge portion 41a, the second laid edge portion 41b, the third laid edge portion 41c, and the fourth laid edge portion 41d have the same shape, and the first inclined edge portion 411 (described later). ).

  Below, the shape of the 1st padding edge part 41a is demonstrated, and description is abbreviate | omitted about the 2nd padding edge part 41b, the 3rd padding edge part 41c, and the 4th padding edge part 41d.

  Compared with the edge part 4 where the adjacent protruding step parts 3a and 3a meet each other and the corners are squared at right angles, the first laying edge part 41a has, for example, a protruding step from the squared end of the edge part 4. A first inclined surface 412 having an outer edge that is a line connecting portions that are inward by the width of the portion 3a is provided, and the first inclined surface portion 411 is formed on the first inclined edge portion 411 so that the first inclined surface 412 serves as an outer edge. . Specifically, the first inclined edge portion 411 has the edge portions 4 that are adjacent to each other while the adjacent protruding step portions 3a and 3a formed with a width of 5 mm come into contact with each other while having a width of 5 mm. The first inclined surface 412 having a line connecting the positions 5 mm inside from the square end of the edge portion 4 as the outer edge is provided, and the first inclined surface 412 is the outer edge. Part 411 is formed.

  Next, a case where four rubber chip mats 11 are laid will be described. As shown in FIG. 6, the first rubber chip mat 11 </ b> A and the third rubber chip mat 11 </ b> C face each other and the first inclined edge portions 411 face each other and are laid diagonally. Then, as shown in FIG. 7, the second rubber chip mat 11B and the fourth rubber chip mat 11D are faced down and are located above the protruding step portions 3a of the first rubber chip mat 11A and the third rubber chip mat 11C. The protruding step portions 3a of the second rubber chip mat 11B and the fourth rubber chip mat 11D are stacked on the concave step portion 3b, and are positioned below the protruding step portions 3a of the second rubber chip mat 11B and the fourth rubber chip mat 11D. The protruding step 3a of the first rubber chip mat 11A and the third rubber chip mat 11C is laid so as to overlap the recessed step 3b.

  By laying in this way, the edge portions of the four rubber chip mats 11A, 11B, 11C, and 11D are formed without leaving a gap between the four rubber chip mats 11A, 11B, 11C, and 11D. Since the part where 4 overlaps can be made the same as the height of the mat 11 made of rubber chips, it can be obtained by laying on the same surface without unevenness.

  In particular, since the four edge portions 4 can have the same shape in all four sheets, the productivity is excellent. In addition, when laying, the rubber chip mat 11 can be laid in any direction, and there is no need to examine and confirm the direction of the edge portion 4 with which the rubber chip mat 11 is abutted. Excellent.

(Embodiment 3)
Embodiment 3 is demonstrated based on FIGS. 8-12. In the third embodiment, only parts different from the second embodiment will be described, and the description thereof will be omitted.

  The third embodiment differs from the second embodiment in the shape of the edge portions 4 of the four rubber chip mats 12A, 12B, 12C, 12D. In the third embodiment, as shown in FIG. 8, the edge portion 4 has a second right-angle protruding portion 42 in which adjacent protruding step portions 3 a and 3 a are provided so as to meet at right angles while maintaining a predetermined width (5 mm width). Consists of. The second right angle protrusion 42 has the same shape as the first right angle protrusion 40b of the first embodiment.

  In the third embodiment, as shown in FIG. 9, two first rubber chip mats 12A and a third rubber chip mat 12C located on the diagonal line are overlapped with each other in the vertical direction with the second right-angle protruding portions 42 of the edge portion 4 being overlapped. The second right angle protrusion 42 of the first rubber chip mat 12A and the second right angle protrusion 42 of the third rubber chip mat 12C are laid so as to overlap in the vertical direction.

  Next, as shown in FIG. 10, a predetermined portion of the overlapping second right angle protrusion 42 is cut with a cutter 5. In this Embodiment 3, it cut | disconnects so that the cutting | disconnection inclination edge part 421 similar to the 1st inclination edge part 411 of Embodiment 2 may remain. By cutting, the triangular cut piece 422 has a cross section of a right-angled isosceles triangle having the width of the protruding step portion 3a, that is, 5 mm as the vertical side and the horizontal side. By removing the triangular cut pieces 422, the triangular cut inclined edge portions 421 of the first rubber chip mat 12A and the third rubber chip mat 12C can be laid against each other.

  Thereafter, the cutting slope edge portion 421 of the first rubber chip mat 12A and the cutting slope edge portion 421 of the third rubber chip mat 12C are butted and laid. Further, as shown in FIG. 11, the second rubber chip mat 12B and the fourth rubber chip mat 12D are turned over, and the second rubber chip is the same as the case of the first rubber chip mat 12A and the third rubber chip mat 12C. Cutting and laying are performed so that the cutting inclined edge 421 similar to the cutting inclined edge 421 remains at the edge 4 of the mat 12B and the fourth rubber chip mat 12D. As shown in FIG. 12, the first rubber chip mat 12A, the second rubber chip mat 12B, the third rubber chip mat 12C, and the fourth rubber chip mat 12D are attached to the respective edge portions 4 by laying down in this way. It can be laid flat without any gaps.

  In the third embodiment, since the first rubber chip mat 12A and the third rubber chip mat 12C are laid and then the overlapped portion of the edge portion 4 is cut and butted at the laid site, It is possible to cut at an arbitrary portion according to fine unevenness and inclined state. The same laying can be carried out with the second rubber chip mat 12B and the fourth rubber chip mat 12D.

(Embodiment 4)
A fourth embodiment will be described with reference to FIGS. 8 and 13 to 16. In the fourth embodiment, only parts different from the third embodiment will be described, and the description thereof will be omitted.

  In the fourth embodiment, as shown in FIG. 8 of the third embodiment, the shape of the edge portion 4 of the four rubber chip mats 13A, 13B, 13C, 13D is used. The edge part 4 consists of the 3rd right angle | corner protrusion part 43 which the adjacent protrusion step part 3a, 3a was provided at the right angle while maintaining predetermined width mutually. The third right angle protrusion 43 has the same shape as the first right angle protrusion 40b of the first embodiment.

  In the fourth embodiment, although not shown in the drawing, as in FIG. 9 of the third embodiment, the two rubber chip mats 13A and the rubber chip mat 13C located on the diagonal line are connected to the third right-angle protruding portion 43 of the edge portion 4. They are laid so that the third perpendicular protrusions 43 of the rubber chip mat 13A and the third perpendicular protrusions 43 of the rubber chip mat 13C overlap with each other in the vertical direction.

  And in Embodiment 4, compared with Embodiment 3, the shape of the edge part 4 to cut | disconnect differs. Specifically, the edge portions 4 of the two first rubber chip mats 13A and the third rubber chip mat 13C located on the diagonal line are aligned with the contours of the third right-angle protruding portions 43 of the third rubber chip mat 13C. 1 The edge 4 of the rubber chip mat 13A is cut into an L shape (see FIG. 13). As shown in FIG. 14, the L-shaped cut piece 432 cut and separated is removed. The remaining portion of the edge portion 4 becomes a cut L-shaped dent portion 431 having the same shape as the first L-shaped dent portion 40a of the first embodiment with the L-shaped cut surface 433 as an outer peripheral surface. Note that the third right-angle protruding portion 43 of the third rubber chip mat 13C is not cut and remains in the same shape as the first right-angle protruding portion 40b of the first embodiment.

  Then, as shown in FIG. 15, as in the first embodiment, the L-shaped cut L-shaped dent 431 of the first rubber chip mat 13A and the third right-angle protruding portion 43 of the third rubber chip mat 13C are provided. Lay them face to face. As shown in FIG. 15, as with the first rubber chip mat 13A and the third rubber chip mat 13C, the second rubber chip mat 13B and the fourth rubber chip mat 13D are turned over, but the second rubber chip mat 13B. The edge portion 4 is cut to form a cut L-shaped dent portion 431, and the third right-angle protruding portion 43 of the fourth rubber chip mat 13D is abutted and laid. Then, as shown in FIG. 16, the four rubber chip mats are spread on the edge portion 4 without any gap.

  In the fourth embodiment, as in the third embodiment, since any portion is cut and matched at the site, the gap can be reliably prevented and laid according to the situation such as the laying surface at the site.

(Other embodiments)
In the first to fourth embodiments, the front-facing rubber chip mat and the back-facing rubber chip mat have the same shape. For example, a pair of rubber-chip mats facing front is set to the first embodiment and facing back. One pair of rubber chip mats that make the first to fourth embodiments face up, and another pair of rubber chip mats that face the back, such as making another pair of rubber chip mats one of the second to fourth embodiments. The rubber chip mat may be combined with the configuration of different embodiments.

  In the first to fourth embodiments, the rubber chip mat 1 is a square, but is not limited to a square, and may be, for example, a rectangle, a rhombus, or a trapezoid.

  The four rubber chip mats 1 may be laid on each other, or may be bonded together with a caulking agent, an adhesive, a sealing material, a double-sided adhesive sheet, or the like.

  When the rubber chip mat 1 is laid, the boundary line between the stepped portions of the adjacent rubber chip mats 1 is finished so that the rubber chip is uneven or consciously randomly formed into a non-linear shape. By doing so, the boundary line may be inconspicuous.

  In addition, it is possible to color the surface of the mat body 2 or draw a picture or the like. In such a case, the aesthetic appearance can be improved. Or you may embed a design or character with a design.

  By mixing color chips with rubber chips, a rubber chip mat having excellent color can be obtained.

  It is also possible in terms of design to change the colors and patterns on the front and back surfaces.

  As explained above, the present invention provides various passages such as walking surfaces, simple paved surfaces, and the like to prevent the growth of weeds, in order to prevent slipping, elasticity, herbicidal properties, design, barrier free, playground safety, etc. Sites and slopes for grass protection, sites for parks, amusement parks, athletics stadiums, etc. It is useful as a rubber chip mat to be laid.

1 Rubber chip mat 1A, 11A, 12A, 13A First rubber chip mat 1B, 11B, 12B, 13B Second rubber chip mat 1C, 11C, 12C, 13C Third rubber chip mat 1D, 11D, 12D, 13D Fourth rubber chip Mat 2 Mat body portion 3 Step portion 3a Protruding step portion 3b Recessed step portion 4 Edge portion 4a First covering edge portion 4b Second covering edge portion 4c Third covering edge portion 4d Fourth covering edge portion 40a First 1L-shaped recess 40b First right angle protrusion 41 First edge part 411 First inclined edge part 412 First inclined surface 42 Second right angle protrusion 421 Cutting inclined edge part 422 Triangular cut piece 43 Third right angle protruding part 431 Cutting L-shaped dent 432 L-shaped cut piece 433 Cut surface 5 Cutter

Claims (7)

In the rubber chip mat laid on the laying surface,
Provided with a plurality of rubber mat bodies molded into a rectangular plate shape,
A rectangular projecting step portion integrally formed by projecting toward the outer side in the width direction at a half height of the mat body portion and at a predetermined width on four side edges of the mat body portion, and the projecting step A stepped portion comprising a rectangular concave step formed on the surface side of the portion is provided,
When the four rubber chip mats are arranged side by side in the front-rear and left-right directions, and adjacent rubber chip mats are laid on the back and front, one set of the rubber chip mats positioned on a pair of diagonal lines laid face-up A first laying edge portion is provided at an edge portion of the protruding step portion of the mat, and a second laying edge that abuts the first laid edge portion at the edge portion of the protruding step portion of the other rubber chip mat. A portion is provided, and the laid first edge portion and the second laid edge portion are provided to be flush with the protruding step portion,
A third laying edge portion is also provided at the edge portion of the protruding step portion of one of the rubber chip mats, and the other edge portion of the rubber chip mat of another set positioned on the diagonal line to be reversed. A fourth laying edge portion that abuts against the third laying edge portion is provided at an edge portion of the protruding step portion of the rubber chip mat, and the third laying edge portion and the fourth laying edge portion that are laid are provided. The laying edge portion is provided so as to be flush with the protruding step portion,
The third laying edge portion of the pair of rubber chip mats in another pair that is turned upside down when the first laying edge portion and the second laying edge portion of the pair of rubber chip mats face each other. And the fourth laying edge portion of the rubber chip mat, and the rubber chip is laid flush with the mat body at the portion where these edge portions overlap. Made of mat. The rubber chip mat according to claim 1,
The second padding edge portion of the pair of other rubber chip mats is formed in a right-angled projecting portion whose corners are squared;
The rubber chip mat characterized in that the first laying edge portion of one of the rubber chip mats is formed in an L-shaped recess portion having an L-shaped outer edge so as to abut against the right-angle protruding portion. . In the rubber chip mat according to claim 2,
The four rubber chip mats laid on the front, rear, left and right have the same shape,
The two edge portions at one diagonal line of the four edge portions of each of the rubber chip mats are the L-shaped recessed portions, and the two edge portions at the other diagonal position The rubber chip mat is characterized in that the portion is composed of the right-angle projecting portion. The rubber chip mat according to claim 1,
The first padding edge portion and the second padding edge portion of the pair of rubber chip mats are formed in an inclined edge portion having an inclined surface as an outer edge. A rubber chip mat characterized in that the surfaces are laid to face each other. The rubber chip mat according to claim 4,
The rubber chip mat includes the inclined edge portions at four edge portions,
A rubber chip mat characterized in that the inclined surfaces of the inclined edge portions can be laid to face each other. In the laying method of the rubber chip mat laid on the laying surface,
A plurality of rubber mat bodies formed by forming the rubber chip mat into a rectangular plate shape;
A rectangular projecting step portion integrally formed by projecting toward the outer side in the width direction at a half height of the mat body portion and at a predetermined width on four side edges of the mat body portion, and the projecting step A step portion formed of a rectangular recessed step portion formed on the surface side of the portion,
When the four rubber chip mats are arranged side by side in the front-rear and left-right directions, and adjacent rubber chip mats are laid on the back and front, one set of the rubber chip mats positioned on a pair of diagonal lines laid face-up The protruding step portion includes a first covering edge portion provided at an edge portion of the protruding step portion of the mat and a second covering edge portion provided at an edge portion of the protruding step portion of the other rubber chip mat. And lay it so that it is flush with
The rubber chip mat located on a pair of diagonal lines in another set is turned face down, the third laying edge part provided at the edge part of the protruding step part of one rubber chip mat, and the other rubber chip The fourth mating edge portion provided at the edge portion of the protruding step portion of the mat is laid so as to be flush with the protruding step portion,
And the protruding step portion of the step portion of the rubber chip mat facing backward overlaps the concave step portion of the step portion of the rubber chip mat facing upward, and the step portion of the step portion of the rubber chip mat facing back is overlapped. Laying the concave stepped portion so that the protruding stepped portion of the stepped portion of the rubber chip mat facing upwards,
A method of laying a rubber chip mat, comprising laying a portion where the edge portions of four rubber chip mats abut each other on a mat body portion. In the laying method of the rubber chip mat laid on the laying surface,
A plurality of rubber mat bodies formed by forming the rubber chip mat into a rectangular plate shape;
A rectangular projecting step portion integrally formed by projecting toward the outer side in the width direction at a half height of the mat body portion and at a predetermined width on four side edges of the mat body portion, and the projecting step A step portion formed of a rectangular recessed step portion formed on the surface side of the portion,
Four rubber chip mats are arranged side by side in the front, rear, left and right, and the rubber chip mats located on a pair of diagonal lines are laid face-up,
A pair of one of the above rubber chip mats, the edge portion of the mat made of rubber chips is cut with a cutter at any part of the overlapping portion, and the separated cut pieces are removed.
With the cut surface as the outer peripheral surface, laying and butting the edge portions of a pair of rubber chip mats,
Laying the rubber chip mat located on another pair of diagonal lines facing down,
Cut an arbitrary portion of the portion where the edge portion of the rubber chip mat of one pair of the other pair overlaps in the vertical direction with a cutter, and remove the separated cut pieces,
With the cut surface as the outer peripheral surface, the edge portions of another pair of rubber chip mats are butted together, and the concave step portion of the step portion of the rubber chip mat facing up is placed on the concave step portion of the rubber chip mat facing back. The protruding stepped portion of the stepped portion is overlapped, and the protruding stepped portion of the stepped portion of the rubber chip mat facing upward is laid on the concave stepped portion of the stepped portion of the rubber chip mat facing backward. ,
A method of laying a rubber chip mat, comprising laying a portion where the edge portions of four rubber chip mats abut each other on a mat body portion.

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