JP6877614B1 - Abrasion resistant lining material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wear-resistant lining material used as a lining material for a wall surface of industrial equipment required to have wear resistance, such as a hopper for inputting or guiding iron ore or coal, or a surface of a chute, and particularly included in the wall surface. Provided is a wear-resistant lining material provided with a bendable region along a rounded surface. SOLUTION: A hard piece (13) laid on an elastic base layer forming a bending region (R) capable of bending in the Y direction with the X direction as the passing direction of an object is a first side wall (13) adjacent to the Y direction. In the mutual of 13b) and (13b), a contact portion (18) that abuts and a closed surface (19) that inclines in a direction away from each other from the corresponding contact portion toward the upper surface (13d) are formed, and a bending region (R) is formed. ) Is bent from the flat plate state (P1) to the curved state (P2), the closed surfaces (19) and (19) are put together between the rigid pieces (13) and (13) adjacent to each other in the Y direction. It is configured so that the edges of the upper surfaces (13d) (13d) are in close contact with each other. [Selection diagram] FIG. 9

Description

The present invention relates to a wear-resistant lining material used as a lining material for a wall surface of an industrial device that is required to have wear resistance, such as a hopper or a chute surface for inputting or guiding iron ore, coal, etc. The present invention relates to a wear-resistant lining material that is bendable along a rounded surface contained in a wall surface.

Generally, in the wear-resistant lineg material, a thick sheet-shaped unvulcanized rubber material is layered on a metal support plate constituting a rectangular plate, and a wear-resistant ceramic piece is placed on the unvulcanized rubber material. It is manufactured by arranging it vertically and horizontally and heating and pressurizing the metal support plate, the rubber material, and the ceramic piece in a mold. This provides a wear-resistant lining material in which a large number of ceramic pieces are laid vertically and horizontally on a metal support plate via an elastic base layer made of rubber. Therefore, the wear-resistant lining material is attached and fixed by arranging the metal support plate on the wall surface of a hopper, a chute, or the like, and inserting a bolt projecting from the back surface of the metal support plate into a bolt hole on the wall surface. Will be done.

By the way, the wall surface of the hopper or chute is not always a flat surface. For example, in the case of a hopper or chute having a square cylinder shape, the corner portion is rounded for the purpose of preventing adhesion of the injected coal or the like. There is a curved shape. In addition, there are hoppers and chutes in which the inner wall surface is curved by forming a tubular shape having a circular or elliptical cross section as a whole. However, the wear-resistant lining material as described above cannot be installed by stacking a metal support plate formed as a rectangular plate on a curved surface.

Therefore, in order to correspond to the wall surface including such a curved surface, a metal support plate bent and molded into an arc shape along the curved surface of the wall surface at the site is manufactured at the design and manufacturing stage, and the metal support plate is formed on the metal support plate. Abrasion-resistant lining materials in which a large number of ceramic pieces are laid vertically and horizontally via an elastic base layer are produced and are individually provided according to the site.

However, providing a wear-resistant lining material corresponding to each site has a problem of high cost, and further causes a problem of a mounting structure on a wall surface. That is, in a metal support plate having an arc-shaped bent portion, when a plurality of bolts are projected from the back surface at intervals, each bolt protrudes from the center of the arc in the radial direction, so that the bolts can be inserted. It is necessary to form bolt holes on the wall surface of the wall with elongated holes. And in the case of a long hole, a special washer is required to fill the hole.

Therefore, the wear-resistant lining material corresponding to the wall surface including the curved surface may be composed of a flexible elastic base layer and ceramic pieces laid vertically and horizontally on the flexible elastic base layer without providing the metal support plate as described above. Desirably, the applicant has just proposed with Patent Document 1 and Patent Document 2 below.

Japanese Unexamined Patent Publication No. 8-268520 Japanese Unexamined Patent Publication No. 8-268521

The wear-resistant lining materials proposed in Patent Document 1 and Patent Document 2 are laid by arranging a large number of ceramic pieces vertically and horizontally on a thick plate-shaped elastic base layer without providing a metal support plate and adhering them. ing. Specifically, the elastic base layer is formed by charging the ceramic pieces vertically and horizontally on an unvulcanized rubber sheet having a predetermined thickness into a mold and heating the rubber sheet while applying pressure to vulcanize the rubber sheet. And the elastic base layer and the ceramic piece are bonded to each other via a vulcanization type adhesive. The unvulcanized rubber sheet may be charged into a mold with canvas or other woven fabric embedded or laminated. In this case, an elastic base layer in which rubber and woven fabric are integrated is vulcanized. ..

In both the wear-resistant lining materials of Patent Document 1 and Patent Document 2, when the elastic base layer is curved and deformed, a large number of ceramic pieces are refracted with each other, so that the elastic base layer can be bent in an arc shape. is there.

In this regard, in the wear-resistant lining material of Patent Document 1, adjacent ceramic pieces are arranged so as to be separated from each other on the side walls, and a lattice-like joint is formed by filling the rubber of the elastic base layer between the adjacent side walls. doing. Therefore, the ceramic pieces arranged in a row facilitate the bending of the wear-resistant lining material while refracting each other through the deformation of the joint.

On the other hand, in the wear-resistant lining material of Patent Document 2, adjacent ceramic pieces are arranged in a state where the entire surface of the side wall is in close contact with each other and adhered to the elastic base layer. Therefore, since the postures of the ceramic pieces arranged in a row are constrained to each other in the refraction direction, the wear-resistant lining material is not inflexible, but it is difficult to bend.

Therefore, the wear-resistant lining material that can be applied to the wall surface including the curved surface has a structure like Patent Document 1 that is easy to bend, rather than a structure like Patent Document 2 that is difficult to bend. Is preferable.

However, the wear-resistant lining material which is easily bent by forming the joint with the rubber of the elastic base layer has various problems as described below as a comparative example with respect to the present invention. Hereinafter, description will be made with reference to FIGS. 1 to 3.

(Comparison example)
The wear-resistant lining material 1 is used as a lining material for the wall surface of a hopper or chute through which an object such as iron ore or coal passes, and is directed on the elastic base layer 2 made of rubber in the X and Y directions orthogonal to each other. The hard pieces 3 and 4 made of a large number of wear-resistant ceramic pieces are arranged vertically and horizontally and bonded.

As shown in FIG. 1, of the X and Y directions orthogonal to each other, the bending region R is configured so that the Y direction can be bent with the X direction as the passing direction of the object, and the bending region R is in the Y direction. Side regions S and S that are difficult to bend or cannot be bent are configured on both sides, a first hard piece 3 is laid in the bent region R, and a second hard piece 4 is laid in the side region S.

A seat substrate 5 is embedded and integrated in the lower surface of the side region S including the four corners of the elastic base layer 2, and bolts 6 are fixed to the seat substrate 5 and project downward.

As the first hard piece 3 and the second hard piece 4, substantially the same one is used, and as shown in FIG. 2A, it is composed of a rectangular plate-shaped ceramic piece.

The second hard piece 4 is arranged on the elastic base layer 2 in the side regions S and S so that the adjacent second hard pieces 4 and 4 are in close contact with each other on the entire side wall surface, and is adhered to the elastic base layer 2. There is. As a result, the edges and corners of the second hard piece 4 are not exposed to the surface because they are brought into close contact with each other without gaps, so that they are less likely to be hit by an object passing in the X direction, damage is prevented, and the object is moved in the X direction. Can be passed smoothly and adhesion is prevented.

On the other hand, as shown in FIG. 2C, in the first hard piece 3, adjacent first hard pieces 3 and 3 are indicated by reference numerals (w) on the elastic base layer 2 in the bending region R. The side walls are arranged so as to be separated from each other, and the joint 2a is formed by filling the rubber of the elastic base layer 2 between the adjacent side walls during vulcanization molding. Therefore, as shown in FIG. 3A, the joints 2a are elastically deformed between the first hard pieces 3 and 3 arranged in the Y direction, so that the pieces 3 and 3 are refracted with each other. However, the bending region R can be easily bent.

Therefore, in the wear-resistant lining material 1 according to the comparative example, the bent bending region R can be overlapped with the curved surface included in the wall surface of the hopper or the chute, and the long hole is formed in the wall surface for attachment and fixing. There is an advantage that the bolts 6 of the side regions S and S can be inserted into the circular holes of the wall surface and fixed by nuts.

However, since the bending region R needs to be bent in the Y direction, it is necessary to form a joint 2a between the first hard pieces 3 and 3 adjacent to each other in the Y direction, and the joint 2a extends in the X direction. Since it is installed, there are the following problems.

Since the joint 2a is rubbed by an object passing in the X direction, it is worn or peeled off at an early stage. Then, when the joint 2a starts to be damaged, as shown in FIG. 3B, the edges and corners of the first hard piece 3 are gradually exposed, so that the joints 2a are easily collided with objects passing in the X direction. Will be damaged. Moreover, the exposed edges and corners are liable to adhere to objects passing in the X direction, which causes deposition. Further, when the joint is worn or peeled off, cracks are likely to occur from the bottom portion toward the inside of the elastic base layer 2. As a result, there is a problem that the durability period of the wear-resistant lining material 1 is shorter than the originally designed life.

The present invention provides an wear-resistant lining material that solves the above problems, and the means configured as the means is a plate-shaped wear-resistant lining material that constitutes a wall surface lining material through which an object passes, and is made of rubber. A large number of wear-resistant hard pieces are arranged vertically and horizontally on the elastic base layer made of the above, and bonded to each other in the X and Y directions orthogonal to each other, with the X direction as the passing direction of the object. It has a bent region that can be bent in the Y direction, and is configured to be attached to the wall surface in a curved state by bending the bent region from a flat plate state. , Each of which is formed in a disk shape having a bottom surface bonded to the elastic base layer, first side walls on both sides in the Y direction, second side walls on both sides in the X direction, and a substantially rectangular upper surface. Formes a contact portion that abuts each other and a closed surface that inclines in a direction away from each other from the contact portion toward the upper surface between the hard pieces adjacent to each other in the Y direction, and the bent region is formed into a flat plate. When the curved state is formed by bending from the state, the closed surfaces are put together between the rigid pieces adjacent to each other in the Y direction, and the upper surfaces are brought into close contact with each other.

In a preferred embodiment of the present invention, the central angle C of the arc when the bent region is curved in an arc shape and the number n of joint points of the hard pieces arranged in the Y direction within the range of the arc. It is characterized in that the inclination angle θ of the closed surface is formed at θ = C / n · 1/2.

In the embodiment of the present invention, the first side wall is adjacent to each other by forming a receding surface between the rigid pieces adjacent to each other in the Y direction, which are separated from each other from the abutting portion which is in contact with each other toward the bottom surface. It is preferable that an internal recess is formed between the receding surfaces, and an internal joint is formed by the rubber of the elastic base layer that is filled in the internal recess and adhered to the receding surface.

According to the present invention, the wear-resistant lining material 11 having a bending region R capable of bending from a flat plate state P1 to a curved state P2 is provided, and is bent with respect to a curved surface included in a wall surface of a hopper or a chute. The bent regions R that have been made can be suitably overlapped, and it is not necessary to form a long hole in the wall surface for attachment and fixing, and the bolts 16 in the side regions S and S are inserted into the bolt holes that are circular holes in the wall surface. And can be fixed with nuts.

In particular, according to the present invention, when the bent region R is bent from the flat plate state P1 to the curved state P2, the first side walls 13b of the first hard pieces 13 and 13 adjacent to each other in the Y direction are in contact with each other. The abutting portions 18 and 18 that are in contact with each other and the closing surfaces 19 and 19 that are inclined in the direction of separation from each other toward the upper surface 13d are formed, whereby a fulcrum for rotational deviation is provided. It is easy to bend the bending region R by rotationally shifting the first hard pieces 13 and 13 to each other.

Then, in the bent region R in the curved state (P2), the edges of the upper surfaces 13d and 13d connected to the closed surfaces 19 are brought into close contact with each other by holding the closed surfaces 19 and 19 together. A smooth surface is formed that does not have grooves or irregularities on which an object passing in the direction is rubbed, and has no cause of adhesion of the object or cause of abrasion or breakage of the first hard piece 13, and is durable. Are better.

It is a perspective view which shows the wear-resistant lining material as a comparative example with respect to this invention. Regarding the comparative example, (A) is a front view and a perspective view of a hard piece made of a ceramic piece, (B) is a cross-sectional view of the wear-resistant lining material in the Y direction, and (C) is a partially enlarged cross-sectional view of a bent region. Regarding the comparative example, a state in which the bent region is bent is shown, (A) is a cross-sectional view of the wear-resistant lining material in the Y direction, and (B) is a partially enlarged cross-sectional view of the bent region. It is a perspective view which shows the wear-resistant lining material which concerns on 1st Embodiment of this invention. Regarding the first embodiment, (A) is a front view and a perspective view of the first hard piece, (B) is a cross-sectional view of the wear-resistant lining material in the Y direction, and (C) is a partially enlarged cross-sectional view of a bent region. It is a perspective view which shows the wear-resistant lining material in the state which the bending region was bent with respect to 1st Embodiment. Regarding the first embodiment, (A) is a cross-sectional view of a wear-resistant lining material in a bent region, (B) is a cross-sectional view illustrating the configuration of a first hard piece in the bent region, and (C) is a first. 1 It is a front view which shows the closed surface formed in a rigid piece. The action of the bent region in the first embodiment is shown, (A) is a cross-sectional view in a flat plate state, and (B) is a cross-sectional view in a curved state. The wear-resistant lining material according to the second embodiment of the present invention is shown, (A) is a front view for explaining the configuration of the first hard piece, (B) is a cross-sectional view when the bent region is in a flat plate state, (C). ) Is a cross-sectional view when the bent region is in a curved state.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(First Embodiment)
4 to 8 show the wear-resistant lining material according to the first embodiment of the present invention.

The wear-resistant lining material 11 is used as a lining material for the wall surface of a hopper or chute through which an object such as iron ore or coal passes, and is placed on an elastic base layer 12 made of vulcanized rubber in the X and Y directions orthogonal to each other. Hard pieces 13 and 14 made of a large number of wear-resistant ceramic pieces are arranged vertically and horizontally and adhered to the surface.

As shown in FIG. 4, of the X direction and the Y direction, a bending region R is configured so that the X direction is the passing direction of the object and the Y direction can be bent, and the bending region R is bent on both sides of the Y direction. Difficult or inflexible side regions S and S are configured, a first rigid piece 13 is laid in the bent region R, and a second rigid piece 14 is laid in the side region S.

A seat substrate 15 is embedded and integrated in the lower surface of the side region S including the four corners of the elastic base layer 12, and bolts 16 are fixed to the seat substrate 15 and project downward.

(Side area and 2nd hard piece)
The second hard piece 14 can be configured in the same manner as in the above-mentioned comparative example (see FIG. 2A), and in the case of the illustrated example, it is composed of a rectangular plate-shaped ceramic piece.

The second hard piece 14 is arranged on the elastic base layer 12 in the side regions S, S so that the adjacent second hard pieces 14 and 14 are arranged in close contact with each other on the four sides of the entire side wall, and the second hard piece 14 is placed on the elastic base layer 12. It is glued. As a result, the edges and corners of the second hard piece 14 are not exposed to the surface because they are brought into close contact with each other without gaps, so that they are less likely to be hit by an object passing in the X direction, damage is prevented, and the object is moved in the X direction. Can be passed smoothly and adhesion is prevented.

(Bending area and first hard piece)
As shown in FIG. 5A, the first rigid piece 13 has a substantially rectangular bottom surface 13a, first side walls 13b and 13b on both sides in the Y direction, and second side walls 13c and 13c on both sides in the X direction. And a ceramic piece forming a disc-shaped body having a substantially rectangular upper surface 13d.

The first side wall 13b has a vertical surface 17 that stands up substantially vertically from a bottom surface 13a to a position that does not reach the top surface 13d, a contact portion 18 formed by the upper end of the vertical surface 17, and the contact portion 18 to the top surface 13d. It forms a closing surface 19 that slopes toward. On the other hand, the second side wall 13c is formed so that the entire surface from the bottom surface 13a to the top surface 13d is a vertical surface that stands up substantially vertically from the bottom surface 13a. As a result, the substantially rectangular shape of the bottom surface 13a and the top surface 13d of the first hard piece 13 has the same width in the X direction, but the width of the top surface 13d in the Y direction as compared with the width of the bottom surface 13a. Is formed small.

Therefore, in the first side wall 13b, the vertical surface 17 and the closed surface 19 are refracted at the intermediate portion in the vertical direction, and the contact portion 18 is formed by the refracted portion. As a result, the abutting portion 18 forms a linear hinge edge 20 extending in the X direction as described later.

Therefore, the first hard piece 13 is densely laid on the elastic base layer 12 in the bent region R in a vertically and horizontally arranged state, and the bottom surface 13a is adhered to the elastic base layer 12.

Adjacent first hard pieces 13 and 13 are in close contact with each other on the entire surfaces of the second side walls 13c and 13c in the X direction, and therefore, the edges of the upper surface 13d connected to the second side wall 13c are also close to each other without any gaps. It is in close contact and not exposed to the surface, which makes it less susceptible to collisions with objects passing in the X direction and prevents edge breakage.

On the other hand, in the Y direction, the first side walls 13b and 13b of the adjacent first hard pieces 13 and 13 are mutually vertical surfaces 17, 17 and abutting portions 18, as shown in FIG. 5C. Although the 18 are brought into close contact with each other without a gap, the closing surfaces 19 and 19 are inclined in the direction of separation from each other, and a substantially V-shaped groove 21 is formed between the adjacent closing surfaces 19 and 19.

(Action)
The wear-resistant lining material 11 according to the first embodiment is shown in FIGS. 6 and 7 (A) from the form in which the bent region R is in a flat plate state (P1) as shown in FIGS. 4 and 5 (B). It can be easily bent so as to have such a curved state (P2). As a result, the bent bending region R can be overlapped with the curved surface included in the wall surface of the hopper or the chute, and it is not necessary to form a long hole in the wall surface for attachment and fixing, and the side region S , S bolt 16 can be inserted into a bolt hole made into a circular hole on the wall surface and fixed with a nut.

In the case of the illustrated embodiment, the bent region R of the wear-resistant lining material 11 is bent in an arc shape so as to change from the flat plate state P1 shown in FIG. 8 (A) to the curved state P2 shown in FIG. 8 (B). ..

With respect to the Y direction, when a force is applied so that the first hard pieces 13 arranged in a row are inside the arc, the elastic base layer 12 is outside the arc, and the bending region R is bent in an arc shape, the first rigid pieces 13 adjacent to each other in the Y direction are adjacent to each other. 1 The rigid pieces 13 and 13 are refracted from each other, and the elastic base layer 12 is extended so that the bent region R can be easily bent.

At this time, the first rigid pieces 13 and 13 adjacent to each other in the Y direction are rotationally displaced with the hinge edge 20 formed by the abutting portions 18 in contact with each other as a fulcrum, and are substantially V-shaped grooves. While closing 21, the closed surfaces 19 and 19 are put together, and the edges of the upper surfaces 13d and 13d connected to the closed surface 19 are brought into close contact with each other. On the contrary, the vertical surfaces 17 and 17 that have been brought into contact with each other are rotationally displaced in the separation direction while extending the elastic base layer 12 with the hinge edge 20 as a fulcrum.

In a used state in which the wear-resistant lining material 11 is attached to the wall surface of the hopper or chute by superimposing the bent region R in the curved state P2 on the curved surface of the wall surface, the first hard piece 13 constituting the bent region R is X. In both the direction and the Y direction, the edges of the four sides of the upper surface 13d are in close contact with each other and have no unevenness.

As described above, the entire surfaces of the second side walls 13c and 13c are brought into close contact with each other in the X direction, and objects such as ore and coal can smoothly pass in the X direction. Since the closed surfaces 19 and 19 of the above are closed together, they do not have grooves or irregularities that receive the rubbing of an object passing in the X direction, and do not form a cause of abrasion or breakage.

As described above, FIG. 7 shows a preferable embodiment regarding the configuration in which the closed surfaces 19 and 19 are put together by bending the bending region R between the first rigid pieces 13 and 13 adjacent to each other in the Y direction. ..

FIG. 7 shows the optimum for the curved wall surface of the inner wall surface of the tubular body having a substantially rectangular cross section, which constitutes the hopper or chute, when a curved wall surface having a radius of 90 degrees is formed at the corner portion. The bending region R of the wear-resistant lining material 11 having such a structure is shown.

In the case of the illustrated example, as shown in FIG. 7A, the arc center angle C when the bent region R is curved in an arc shape along the curved wall surface is 90 degrees, and the bent region R in the Y direction. The number of the first hard pieces 13 constituting the above is six, and the number n of the joints where the six first hard pieces 13 are joined to each other within the range of the arc is five.

In this case, it is preferable to determine the inclination angle θ of the closed surface 19 shown in FIG. 7 (C) by the following equation, subject to the above C and n.
Equation: θ = C / n · 1/2

The inclination angle θ of the closed surface 19 is defined by the angle between the extension line of the vertical surface 17 and the closed surface 19, and in the case of the configuration example shown in FIG. 7, it is obtained by θ = 90/5/2, and θ = 9. A closed surface 19 is formed as a degree.

Therefore, of the six first hard pieces 13 constituting the bending region R shown in FIG. 7 (B), the two first hard pieces 13-1 and 13-6 located at both ends are shown in FIG. 7 (A). ), And the first hard pieces (13-2 to 13-5) between them are bent along the arc, and the adjacent first hard pieces 13 and 13 come into contact with each other. With the 18 and 18 in contact with each other, the entire surfaces of the closed surfaces 19 and 19 are brought into surface contact with each other.

As a result, the edges of the upper surfaces 13d and 13d in the Y direction are also brought into close contact with each other, and the object of the invention of not forming the above-mentioned grooves and irregularities can be achieved. Then, in the bending work of the bending region R for generating such a close state, the adjacent first hard pieces 13 and 13 are rotated in the refraction direction with the hinge edge 20 formed by the abutting portions 18 as a fulcrum. Since it enables a motion deviation operation, it can be easily and easily performed.

Regarding this point, when the bending region R is bent, the motion of the adjacent first hard pieces 13 and 13 to rotate and deviate can be absorbed to some extent by the elasticity of the elastic base layer 12, and thus the inclination thereof. The angle θ is not necessarily strict, and some error can be tolerated. For example, in the above configuration example, even if the inclination angle θ is formed to be slightly smaller than 9 degrees, at the initial stage of bending the bending region R, the adjacent first hard pieces 13 and 13 are hinged by the contact portion 18. It is suitably rotationally displaced with 20 as a fulcrum, facilitating bending work. After that, the edges of the upper surfaces 13d and 13d in the Y direction are brought into close contact with each other, and when the bending is further advanced from that state, the lower portions of the closed surfaces 19 and 19 with the close edges as fulcrums are the contact portions 18 and 18. However, in the bent region R when the curved state P2 is finally obtained, the upper surfaces 13d and 13d of the first hard piece 13 constituting the surface are in close contact with each other, and the object of the present invention is It is possible to reach.

(Second Embodiment)
FIG. 9 shows the wear-resistant lining material according to the second embodiment of the present invention.

In the first embodiment described above, the first rigid piece 13 forms a vertical surface 17 between the bottom surface 13a of the first side wall 13b and the abutting portion 18, but the second embodiment shows FIG. 9 (A). ), Instead of the vertical surface 17, a receding surface 22 that is inclined by an angle Z toward the bottom surface 13a is formed.

Therefore, the wear-resistant lining material 11 is between the receding surfaces 22 and 22 adjacent to each other in the Y direction with respect to the bending region R in which the first hard piece 13 is laid on the elastic base layer 12. An internal recess 23 is formed in the inner recess 23, and an internal joint 24 filled with the rubber of the elastic base layer 12 is formed in the internal recess 23. The internal joint 24 is formed by filling the internal recess 23 with the rubber of the elastic base layer 12 during vulcanization molding. The internal joint 24 is vulcanized and adhered to the receding surface 22 by a vulcanization type adhesive. Since other configurations are the same as those in the first embodiment described above, the above description is incorporated.

The bent region R of the wear-resistant lining material 11 is bent so as to change from the flat plate state P1 shown in FIG. 9 (A) to the curved state P2 shown in FIG. 9 (B). When a force is applied to bend the bent region R in the flat plate state P1 in an arc shape, the first hard pieces 13 and 13 adjacent to each other in the Y direction are mutually refracted, and the elastic base layer 12 is extended and bent. The region R can be easily bent. At this time, the hinge edges 20 formed by the abutting portions 18 that are in contact with each other are used as a fulcrum, and the closed surfaces 19 and 19 are held together, and the edges of the upper surfaces 13d and 13d are brought into close contact with each other. To do. This point is the same as in the case of the first embodiment described above.

In the case of the second embodiment, by rotationally deviating with the hinge edge 20 as a fulcrum, the retracting surfaces 22 and 22 are rotationally displaced in the direction away from each other while extending the internal joints 24. The inner joint 24 is formed of rubber integrally with the elastic base layer 12, and is elastically supported from below in a state of being adhered to the receding surfaces 22 and 22.

Therefore, objects such as ore and coal thrown into the hopper and chute violently collide with the wear-resistant lining material 11 and give a large impact to the first hard piece 13 and the second hard piece 14, but both hard pieces. 13 and 14 are elastically supported by the elastic base layer 12, and the impact is suitably absorbed and relaxed.

By the way, when the elastic support by the elastic base layer 12 is uneven, there is a possibility that the hard pieces 13 and 14 are cracked at the portion where the elasticity is insufficient.

The bent region R of the wear-resistant lining material 11 has a configuration in which adjacent first hard pieces 13 and 13 are mutually refracted with the hinge edge 20 of the contact portion 18 as a fulcrum. There may be a gap between the elastic base layer 12 and the elastic base layer 12. For example, in the case of the first embodiment described above, as shown in FIG. 8B, a gap is formed between the separated vertical surfaces 17 and 17, which causes unevenness in the elastic support by the elastic base layer 12. There is a possibility that

In this regard, according to the second embodiment, no gap is formed between the lower portion of the first hard piece 13 and the elastic base layer 12. On the lower side of the abutting portion 18, the internal recesses 23 formed by the retracting surfaces 22 and 22 are formed with internal joints 24 made of rubber filled from the elastic base layer 12. Then, even when the bent region R is in the curved state P2, the receding surfaces 22 and 22 are elastically supported from below by the internal joint 24 integrated with the elastic base layer 12, so that the first hard piece 13 by the elastic base layer 12 There is no unevenness in the elastic support of.

As a result, the first hard piece 13 is elastically and satisfactorily supported by the elastic base layer 12 over the entire lower side, so that it is possible to form a bent region R without a risk of cracking.

11 Abrasion resistant lining material 12 Elastic base layer 13 1st hard piece 13a Bottom surface 13b 1st side wall 13c 2nd side wall 13d Top surface 14 2nd hard piece 15 Seat substrate 16 Bolt 17 Vertical surface 18 Contact part 19 Closed surface 20 Hinge edge 21 Groove 22 Retreat surface 23 Internal recess 24 Internal joint

Claims (3)

It is a plate-shaped wear-resistant lining material that constitutes the lining material of the wall surface through which objects pass.
A large number of wear-resistant hard pieces (13,14) are arranged vertically and horizontally on the elastic base layer (12) made of rubber in the X and Y directions orthogonal to each other and adhered to each other. It has a bent region (R) that can be bent in the Y direction with the direction as the passing direction of the object, and by bending the bent region (R) from the flat plate state (P1), it becomes a curved state (P2). In the one configured to be mounted on the wall surface,
The hard pieces (13) constituting the bent region (R) are the bottom surface (13a) bonded to the elastic base layer (12), the first side walls (13b) on both sides in the Y direction, and the first side walls (13b) in the X direction, respectively. It is formed in a disc shape with second side walls (13c) on both sides and a nearly rectangular upper surface (13d).
The first side wall (13b) is abutting portion (18) that abuts each other between the rigid pieces (13) and (13) adjacent to each other in the Y direction, and each other from the corresponding contact portion toward the upper surface (13d). It forms a closed surface (19) that inclines in the direction of separation.
When the bent region (R) is bent from the flat plate state (P1) to the curved state (P2), the closed surfaces (19) (19) are formed between the hard pieces (13) and (13) adjacent to each other in the Y direction. ) Are joined together, and the wear-resistant lining material is configured so that the edges of the upper surfaces (13d) and (13d) are brought into close contact with each other. With respect to the arc center angle C when the bent region (R) is curved in an arc shape and the number n of joints of the hard pieces (13) arranged in the Y direction within the arc.
The wear-resistant lining material according to claim 1, wherein the inclination angle θ of the closed surface (19) is formed at θ = C / n · 1/2. The first side wall (13b) is a receding surface that separates from each other from the abutting portion (18) that abuts each other toward the bottom surface (13a) between the rigid pieces (13) and (13) that are adjacent to each other in the Y direction. By forming (17), an internal recess (23) is formed between adjacent receding surfaces (17) and (17).
The first or second claim is characterized in that the inner joint (24) is formed by the rubber of the elastic base layer which is filled in the inner recess (23) and adhered to the receding surface (17,17). The wear resistant lining material described.

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