JP2010281078A - Spacer for wire net - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spacer for a wire net that can stably maintain the spacing of all the sides of a rhombus of the wire net. <P>SOLUTION: The spacer 20 for the wire net includes side face wire parts 21, 22, center turn-around parts 24 abutting on the ground surface, first legs 25 extending to a connecting wire part 23, and second legs 26 extending after rising upward from the other side of the center turn-around parts. Each first leg 25 includes a first bent part 27 receiving the first side of the wire net and supporting the first side in a lifted position from the ground surface while energizing the first side to be kept away from the third side. Each second leg 26 includes a second bent part 28 receiving at least one of the second, third and fourth sides of the wire net and supporting the at least one side in a lifted state from the ground surface. The second bent part 28 is shaped to energize the third side to be kept away from the first side and to energize at least one of the second and fourth sides to be kept away from the other side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a reinforcing wire mesh spacer for holding a wire mesh embedded in concrete to be laid to reinforce a slope or the like at a predetermined height.

  As a reinforcing wire mesh, there is a so-called lath wire mesh. The lath metal mesh is obtained by crossing the first and second metal wires bent in a zigzag shape at regular intervals at their bent portions. Looking at the final product, the lath wire mesh forms a rhombus with the first side, the second side, the third side, and the fourth side, and the first side and the third side face each other. The second side and the fourth side are opposed to each other.

  In the lath wire mesh, since the adjacent first metal wire and second metal wire are simply crossed at the bent portion, the distance between the opposite sides of the rhombus is not constant. Further, in order to prevent the lath wire mesh from being corroded by moisture from the concrete placement ground, it is necessary to hold the lath wire mesh in a state of being floated to a predetermined height from the placement ground (ground).

  Japanese Patent Laying-Open No. 2008-75404 (Patent Document 1) discloses a reinforcing wire mesh support spacer suitable for supporting a lath wire mesh. FIG. 13 shows the support spacer disclosed in this publication.

  With reference to FIG. 13, the shape of the reinforcing wire mesh support spacer disclosed in Japanese Patent Application Laid-Open No. 2008-75404 will be described. The reinforcing wire mesh support spacer is formed by bending a single metal wire into a predetermined shape, and two legs 1 and 2 bent in a U shape face each other in parallel. The two legs 1, 2 have one end that is a free end and the other end connected by a connecting member 3. Paying attention to the shape of each leg member 1, each leg member has a pair of shaft parts 5, 6 that constitute opposite ends of the leg member and face each other at the folded portion 4 at the bottom. The pair of shaft portions 5 and 6 are provided with depressions 7 and 8 that are recessed outwardly in the opposite direction to the direction in which these shaft portions face each other. The distances from the ground where the turn-up points 4 of the legs 1 and 2 are in contact to the recesses 7 and 8 of the shafts 5 and 6 are equal, and one of the recesses 7 is located between the connecting member 3 and the turn-up points 4.

  One recess 7, 7 accepts the first side of the lath wire mesh rhombus and supports it at a predetermined height, and the other recess 8, 8 accepts the third side of the lath wire mesh and supports it at a predetermined height To do.

JP 2008-75404 A

  When the reinforcing wire mesh support spacer disclosed in Japanese Patent Application Laid-Open No. 2008-75404 is used at a construction site, it is elastically deformed so as to reduce the interval between the opposed shaft portions 5 and 6 and is attached to the lath wire mesh. FIG. 14 schematically shows a reinforcing wire mesh support spacer after being attached to a lath wire mesh.

  FIG. 14 shows a lath wire mesh having a rhombus shape including a first side 11, a second side 12, a third side 13, and a fourth side 14. As shown in the figure, in the state where the reinforcing wire mesh support spacer is mounted, the opposing recesses 7 and 8 tend to move away from each other by the elastic restoring force of the shaft portions 5 and 6. Accordingly, the distance between the first side 11 of the lath wire mesh received in the recess 7 and the third side 13 received in the recess 8 is stably and constantly maintained by the force that is expanded.

  However, the following points can be pointed out as problems of the reinforcing wire mesh support spacer disclosed in Japanese Patent Application Laid-Open No. 2008-75404.

  First, the two U-shaped legs 1 and 2 facing each other in a parallel relationship maintain a distance from the second side 12 and the fourth side 14 of the rhombus rhombus. It does not give the power. Therefore, although the distance between the first side 11 and the third side 13 is kept constant, the distance between the second side 12 and the second side is not constant and becomes unstable.

  Secondly, when the reinforcing wire mesh support spacer is attached to the lath wire mesh, it is necessary to be elastically deformed so as to reduce the distance between the opposed shaft portions 5 and 6, but a very large force is required to cause the elastic deformation. Can point out the problem of being necessary. In order to have a predetermined strength as a reinforcing wire mesh support spacer, the thickness of the metal wire forming the spacer needs to be greater than or equal to a predetermined value. In the reinforcing wire mesh support spacer disclosed in Japanese Patent Application Laid-Open No. 2008-75404, the pair of legs 1 and 2 has an U-shaped elastic deformation force. However, when the thickness of the metal wire is increased. A great amount of force is required for elastic deformation.

  Thirdly, in the reinforcing wire mesh support spacer disclosed in Japanese Patent Application Laid-Open No. 2008-75404, the connecting member 3 and the pair of legs 1 and 2 intersect at a right angle. Therefore, in a state in which the reinforcing wire mesh support spacer is mounted on the lath wire mesh, the upper portions of the pair of legs 1 and 2 that stand upright in parallel relation are exposed on the wire mesh. A rope may be used at the construction site, but if this rope collides with one of the legs 1 and 2 from the side, there is a risk that the reinforcing wire mesh support spacer will be twisted sideways by this impact force and come off the lath wire mesh. is there.

  An object of the present invention is to provide a wire mesh spacer capable of stably maintaining the intervals between all sides of a wire mesh rhombus.

  Another object of the present invention is to provide a wire mesh spacer that can be easily elastically deformed when a wire mesh is mounted even when a thick metal wire is used.

  Still another object of the present invention is to provide a wire mesh spacer that can stably maintain the wire mesh mounting state even if an unexpected force is applied after the wire mesh is mounted.

  The wire mesh spacer according to the present invention forms a rhombus with the first side, the second side, the third side, and the fourth side, the first side and the third side are opposed, 2 for supporting the wire mesh in which the second side and the fourth side are opposed to each other in a state of being floated from the ground, and by bending one wire, and opposing first and second side surface wire parts And a connecting wire portion that connects one ends of both side surface wire portions. The first and second side surface wire portions are respectively a central folded portion in contact with the ground, a first leg that rises upward from one side of the central folded portion and extends to the connecting wire portion, and the other side of the central folded portion And a second leg portion that rises upward and extends. Each first leg portion of the first and second side wire portions receives the first side of the wire mesh, supports the first side at a position floating from the ground, and attaches the first side to the third side. A first bent portion is included. Each of the second leg portions of the first and second side surface wire portions receives at least one of the second side, the third side, and the fourth side of the wire mesh, A second bent portion that is supported while being floated from the ground is included. At least one of the second bent portions of the first and second side surface wire portions urges the third side away from the first side, and the second side and the fourth side It has the shape which urges | biases so that any one side may be kept away from the other side.

  According to the present invention having the above-described configuration, it is possible to stably maintain the interval between the four sides of the diamond mesh.

  In order for the second bent portion to stably maintain the distance between the second side and the fourth side, preferably, the first side surface wire portion and the second side surface wire portion are connected wire portions. As the distance from the connection point increases, the distance between the two gradually increases.

  In order to allow the first side surface wire portion and the second side surface wire portion to be elastically deformed with a relatively small force, preferably, the central folded portion has a loop shape.

  In one embodiment, the second bent portion of at least one of the first side surface wire portion and the second side surface wire portion has the free end directed in the direction opposite to the other side surface wire portion. An upper U-shaped bent portion and a lower U-shaped bent portion connected in a reverse U-shape under the upper U-shaped bent portion.

  In another embodiment, the second bent portion of at least one of the first side surface wire portion and the second side surface wire portion is from the upper end portion of the second leg portion toward the first leg portion. A first linear portion extending in a bent manner, an inverted U-shaped bent portion extending upward and outward from an inner end of the first linear portion, and extending from an inverted U-shaped bent portion to a free end A second linear portion extending in the same direction in parallel to the side of the one linear portion.

  In order to prevent a rope or the like from colliding with a wire mesh spacer at a construction site, the pair of first leg portions and the connecting wire portion located above the first bent portion are not easily detached from the wire mesh. The shape of the pair of first leg portions is narrowed upward.

It is a perspective view of the spacer for wire meshes concerning one Embodiment of this invention. It is a side view of the spacer for wire meshes shown in FIG. It is a top view of the spacer for wire meshes shown in FIG. It is a perspective view of the state which mounted | wore the wire mesh with the spacer for wire meshes shown in FIG. It is a perspective view of the spacer for wire-mesh which concerns on other embodiment of this invention. It is a side view of the spacer for wire meshes shown in FIG. It is a top view of the spacer for wire meshes shown in FIG. It is a perspective view of the state which attached the spacer for wire meshes shown in FIG. 5 to the wire mesh. It is a perspective view of the spacer for wire meshes concerning other embodiment of this invention. It is a figure which shows the example of the shape which the upper part of a pair of 1st leg part and a connection wire part form. It is a figure which shows the state in which the spacer for wire meshes shown in FIG. 1 is mounted | worn with the wire mesh. FIG. 6 is a view schematically showing a state in which the wire mesh spacer shown in FIG. 5 is attached to the wire mesh. It is a perspective view of the reinforcement metal-mesh support spacer disclosed by Unexamined-Japanese-Patent No. 2008-75404. It is a figure which shows the state in which the reinforcement metal-mesh support spacer shown in FIG. 13 is attached to the metal mesh.

  1 to 4 and 11 show a wire mesh spacer 20 according to an embodiment of the present invention. As is apparent from FIG. 4, the wire mesh is called a so-called lath wire mesh, and the first metal wire material 10a and the second metal wire material 10b which are bent in a zigzag shape at a constant interval are bent. It is multiplied by. Looking at the final product, the lath wire mesh forms a rhombus with the first side 11, the second side 12, the third side 13 and the fourth side 14, and the first side 11 and the third side 13. Are opposed to each other, and the second side 12 and the fourth side 14 are opposed to each other.

  The wire mesh spacer 20 is provided with a connecting wire rod portion 23 that bends one wire and connects the opposing first side wire portion 21 and second side wire portion 22 and one ends of both side wire portions 21 and 22. Molded into a shape. The other ends of the side surface wire portions 21 and 22 are free ends. The wire rod for forming the wire mesh spacer 20 is typically a metal wire material such as steel, but any material can be used as long as it has the strength and elasticity necessary for the wire mesh spacer. Good. However, it can be said that a wire made of a metal material compared to a plastic material is more preferable because it is naturally friendly, expands and contracts similarly to mortar, and has good compatibility with mortar.

  In the illustrated embodiment, the first side surface wire portion 21 and the second side surface wire portion 22 have a symmetrical shape. Each side wire portion includes a folded portion 24 in contact with the ground, a first leg portion 25 that rises upward from one side of the folded portion 24 and extends to the connecting wire portion 23, and upward from the other side of the central folded portion 24. And a second leg portion 26 extending up.

  As is clear from FIGS. 3 and 11, the first side surface wire portion 21 and the second side surface wire portion 22 have a shape in which the distance between both gradually increases as the distance from the connection point with the connection wire portion 23 increases. When the wire mesh spacer 20 is attached to the wire mesh, the wire mesh spacer 20 is elastically deformed so as to reduce the distance between the first side wire portion 21 and the second side wire portion 22.

  When attaching the wire mesh spacer 20 to the wire mesh, it is necessary to elastically deform the first leg portion 25 and the second leg portion 26 so as to approach each other. In order to enable the elastic deformation to be performed with a relatively small force, in the illustrated preferred embodiment, the folded portion 24 has a loop shape.

  The first leg portion 25 of each of the side wire portions 21 and 22 receives the first side 11 of the wire mesh, supports the first side 11 at a position floating from the ground, and from the third side 13 facing the first side 11. A first bent portion 27 that biases away is included. The urging force of the first bent portion 27 is exerted by the elastic restoring force of the first leg portion 25. The first bent portion 27 has a U-shaped bent shape that becomes an opening in a direction away from the second leg portion 26.

  The second leg portion 26 of each side wire portion 21, 22 receives at least one of the second side 12, the third side 13, and the fourth side 14 of the wire mesh, and at least any one of them A second bent portion 28 that supports the side in a state of floating from the ground is included. In the illustrated embodiment, the pair of second bent portions 28 urges the third side away from the first side 11 and keeps the second side 12 and the fourth side 14 away from each other. It has a shape to be urged.

  A specific shape of the second bent portion 28 in the preferred embodiment will be described. The second bent portion 28 has an upper U-shaped bent portion 28a having a free end directed in a direction opposite to that of the other side member, and a U-shape opposite to the upper U-shaped bent portion 28a. And a lower U-shaped bent portion 28b.

  The state in which the wire mesh spacer 20 supports the wire mesh will be described in detail with reference to FIGS. 4 and 11. In a free state before the wire mesh spacer 20 is attached to the wire mesh, the distance between the first bent portion 27 and the upper U-shaped bent portion 28b of the second bent portion 28 is the first side 11 of the wire mesh and the third side. The distance between the left and right upper U-shaped bent portions 28 b is larger than the distance between the second side 12 and the fourth side 14. Therefore, in a state where the wire mesh spacer 20 is elastically deformed and attached to the wire mesh, the first bent portion 27 and the upper U-shaped bent portion 28a exhibit an elastic restoring force that moves away from each other, and the first side 11 And the distance between the third side 13 is stably maintained. Further, the left and right upper U-shaped bent portions 28a exhibit an elastic restoring force that moves away from each other, and stably maintains the distance between the second side 12 and the fourth side 14.

  The lower U-shaped bent portion 28b of the second bent portion 28 is located below the third side 13 and maintains the third side 13 at a predetermined height.

  In the embodiment shown in FIGS. 1 to 4, the left and right second bent portions 28 have a symmetric shape. However, as a modification, only one of the second bent portions is illustrated, that is, the upper U It may have a shape having a letter-shaped bent part 28 a and a lower U-shaped bent part 28 b, and the other second bent part may have a U-shaped bent part opposite to the first bent part 27.

  5 to 8 and 12 show a wire mesh spacer 30 according to another embodiment of the present invention. The wire mesh spacer 30 shown in the figure includes a first side surface wire portion 31 and a second side surface wire portion 32 that face each other, and a connecting wire portion 33 that connects one end of both side surface wire portions, as in the above-described embodiment. . Unlike the above-mentioned embodiment, the 1st side surface wire part 31 and the 2nd side surface wire part 32 have asymmetrical shape. As shown in FIGS. 7 and 12, the first side surface wire portion 31 and the second side surface wire portion 32 have a shape in which the distance between both gradually increases as the distance from the connection point with the connection wire portion 33 increases.

  As illustrated, the first side surface wire portion 31 includes a loop-shaped central folded portion 34, a first leg portion 35a that rises upward from one side of the central folded portion 34 and extends to the connecting wire portion 33, and a center. And a second leg portion 36a extending upward from the other side of the folded portion 34. The first leg 35a receives the first side 11 of the wire mesh, supports the first side 11 at a position floating from the ground, and biases the first side 11 away from the third side 13. 37a is included. The 1st bending part 37a is the shape of the U-shaped bending part which is an opening in the direction opposite to the 2nd leg part 36a. As shown in FIG. 12, the second leg portion 36 a includes a second bent portion 38 a that receives the third side 13 of the wire net and supports the third side 13 in a state of floating from the ground. The 2nd bending part 38a is a shape of the U-shaped bending part of the reverse direction to the 1st bending part 37a.

  The second side surface wire portion 32 includes a loop-shaped central folded portion 34, a first leg portion 35 b extending upward from one side of the central folded portion 34, and an upward rising from the other side of the central folded portion 34. 2nd leg part 36b extended. The first leg 35b receives the first side 11 of the wire mesh, supports the first side 11 at a position floating from the ground, and biases the first side 11 away from the third side 13. 37b is included. The first bent portion 37a of the first side surface wire portion 31 and the first bent portion 37b of the second side surface wire portion 32 are U-shaped bent portions having the same shape and facing in the same direction. The second leg portion 36b urges the third side 13 of the wire mesh away from the first side 11 and urges the fourth side 14 away from the second side 12. 2 bent portions 38b are included. In the preferred embodiment shown in the drawing, the second bent portion 38b includes a first straight portion 381 extending from the upper end portion of the second leg portion 36b to bend toward the first leg portion 35b, and an inner end of the first straight portion 381. An inverted U-shaped bent portion 382 that rises upward and outward in an inverted U-shape and extends in the same direction on the side of the first straight portion 381 from the lower end to the free end of the inverted U-shaped bent portion 382. A second linear portion 383 extending.

  As shown in FIG. 12, in a state in which the wire mesh spacer 30 is attached to the wire mesh, the first bent portions 37a and 37b urge the first side 11 of the wire mesh downward in the drawing, and the second bent portion 38a. Further, since the inverted U-shaped bent portion 382 urges the third side upward in the drawing, the distance between the first side 11 and the third side 13 facing each other is stably maintained constant. .

  Further, the second bent portion 38a abuts on the second side 12, and the inverted U-shaped bent portion 382 urges the fourth side 14 in the left direction in the figure, so that the opposing second side 12 And the fourth side 14 are stably kept constant. The first and second straight portions 381 and 383 of the second bent portion 38b support the third side 13 from below, thereby maintaining the third side 13 at a predetermined height.

  FIG. 9 shows a wire mesh spacer 40 according to still another embodiment of the present invention. The wire mesh spacer 40 shown in FIG. 9 is different from the spacer 30 shown in FIG. 5 only in the shape of the second bent portion 38 a of the first side surface wire portion 31. Since the other parts are completely the same, the description is omitted by giving the same numbers.

  In the embodiment shown in FIG. 9, the first side surface wire portion 31 and the second side surface wire portion 32 have a symmetrical shape. Accordingly, the second bent portion 38a of the first side surface wire portion 31 includes a first straight portion 381 extending from the upper end portion of the second leg portion 36a toward the first leg portion 35a, and an inner portion of the first straight portion 381. The reverse U-shaped bent portion 382 that rises upward and outward from the end and extends in an inverted U-shape and the same in parallel on the side of the first straight portion 381 from the lower end of the inverted U-shaped bent portion 382 to the free end And a second straight portion 383 extending in the direction.

  A rope or the like may collide with a wire mesh spacer at a construction site. In order to prevent the spacer from easily coming off the wire mesh even when a rope or the like collides with the wire mesh spacer after being attached to the wire mesh, a pair of first legs located above the first bent portion; You may devise the shape formed by a connection wire part. For example, if the pair of first leg portions and the connecting wire portion positioned above the first bent portion are shaped so that the distance between the pair of first leg portions narrows upward, the rope Even if the rope collides with the first leg from the side, the rope becomes slippery obliquely upward, so that the collision force acting in the lateral direction can be reduced and the spacer can be effectively prevented from coming off. it can. Some of the preferred shapes are shown in FIG.

  In (a), (b), (c), and (d) of FIG. 10, reference number 41a indicates the first bent portion of the first side surface wire portion, and reference number 40a is located above the first bent portion. The 1st leg part to show is shown. Reference number 41b indicates the first bent portion of the second side surface wire portion, and reference number 40b indicates the first leg portion located above the first bent portion. Reference numeral 42 is a connecting wire portion that connects the first leg portion 40a of the first side surface wire portion and the first leg portion 40b of the second side surface wire portion.

  What is common in the various forms shown in FIG. 10 is that the pair of first leg portions 40a, 40b and the connecting wire portion 42 positioned above the first bent portions 41a, 41b are a pair of first legs. A shape in which the interval between the portions narrows upward is formed. More specifically, in the form shown in FIG. 10A, a pair of legs and a connecting wire part form a trapezoid, and in the form shown in FIG. 10B, a pair of legs and the connecting wire part forms a triangle. In the form shown in FIG. 10C, a pair of leg portions and a connecting wire portion form an upwardly convex parabolic shape. In the form shown in FIG. 10 (d), the pair of leg portions first extend vertically upward, and obliquely extend from the middle toward the connecting wire portion that is the apex of the triangle.

  While the embodiments of the present invention have been described by way of example with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same or equivalent scope as the present invention.

  The present invention can be advantageously used as a wire mesh spacer that can stably support a lath wire mesh or the like at a predetermined height.

DESCRIPTION OF SYMBOLS 1 Leg material, 2 Leg material, 3 Connection material, 4 Folding location, 5 Axis part, 6 Axis part, 7 Indentation, 8 Indentation, 10a 1st metal wire, 10b 2nd metal wire, 11 1st edge, 12 1st 2 side, 13 3rd side, 14 4th side, 20 wire mesh spacer, 21 first side wire part, 22 second side wire part, 23 connecting wire part, 24 central turn part, 25 first leg part , 26 Second leg, 27 First bent portion, 28 Second bent portion, 28a Upper U-shaped bent portion, 28b Lower U-shaped bent portion, 30 Wire mesh spacer, 31 First side wire portion, 32 Second Side wire portion, 33 connecting wire portion, 34 center folded portion, 35a first leg portion, 35b first leg portion, 36a second leg portion, 36b second leg portion, 37a first bent portion, 37b first bent portion, 38a Second bent portion, 38b Second bent portion, 381 First straight portion, 382 Reverse U Characteristic bent part, 383 2nd straight part, 40a 1st leg part, 40b 1st leg part, 41a 1st bent part, 41b 1st bent part, 42 connecting wire part.

Claims (6)

The first side, the second side, the third side, and the fourth side form a rhombus, the first side and the third side face each other, and the second side and the fourth side are A wire mesh spacer for supporting an opposing wire mesh in a floating state from the ground,
One wire is bent into a shape including first and second side surface wire portions facing each other and a connecting wire portion connecting one end of both side surface wire portions,
The first and second side surface wire portions are respectively
A central folded portion that is in contact with the ground; a first leg that rises upward from one side of the central folded portion and extends to the connecting wire portion; and a second leg that rises upward from the other side of the central folded portion and extends Including
Each of the first leg portions of the first and second side wire portions receives the first side of the wire mesh, supports the first side at a position floating from the ground, and keeps it away from the third side. Including a first bent portion urging
Each of the second leg portions of the first and second side surface wire portions receives at least one of the second side, the third side, and the fourth side of the wire mesh, and Including a second bent portion that supports the side in a floating state from the ground;
At least one of the second bent portions of the first and second side surface wire portions urges the third side away from the first side, and the second side and the fourth side. A wire mesh spacer having a shape for biasing one of the sides away from the other side. The wire mesh spacer according to claim 1, wherein the first side surface wire portion and the second side surface wire portion have a shape in which a distance between the first side surface wire portion and the second side surface wire portion gradually increases as the distance from the connection point with the connection wire portion increases. The wire mesh spacer according to claim 1, wherein the central folded portion has a loop shape. The second bent portion of at least one of the first side surface wire portion and the second side surface wire portion has an upper U shape with a free end directed in a direction opposite to the other side surface wire portion. The wire mesh spacer according to any one of claims 1 to 3, comprising a bent portion and a lower U-shaped bent portion connected in a reverse U-shape under the upper U-shaped bent portion. . The second bent portion of at least one of the first side surface wire portion and the second side surface wire portion is bent from the upper end portion of the second leg portion toward the first leg portion. A first straight portion extending from the inner end of the first straight portion, an inverted U-shaped bent portion extending upward and outward from the inner end, and extending from a lower end to a free end of the inverted U-shaped bent portion. The spacer for wire meshes according to any one of claims 1 to 3, further comprising a second straight portion extending in the same direction in parallel to a side of the first straight portion. The pair of first leg portions and the connecting wire portion located above the first bent portion form a shape in which the distance between the pair of first leg portions narrows upward. The spacer for wire meshes in any one.

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