Method for Separating a Ventilated Plate Material

Abstract

Enable breathable sheet materials to be taken out one by one at low cost. 【Solution means】A separation method for breathable sheet materials, comprising a placing step of placing a laminate L in which a plurality of breathable sheet materials 10 are laminated on a placing surface S, and a suction step of sucking and lifting the sheet material 10 on the outermost surface of the laminate L. In the placing step, a spacer 25a is installed between the placing surface S and the laminate L to elastically deform each sheet material 10 constituting the laminate L so that the central portion in the length direction of the laminate L protrudes more than both end portions in the length direction of the laminate L. In the suction step, while pressing the central portion in the length direction of the outermost surface sheet material 10, both end portions in the length direction of the outermost surface sheet material 10 are sucked, and the sheet material 10 is lifted so that at least one of both end portions in the length direction of the sheet material 10 is positioned above the central portion in the length direction of the sheet material 10.

Description

Technical Field

[0001] The present invention relates to a method for separating breathable plates.

Background Art

[0002] In recent years, in the fields such as construction, in order to minimize the processing of wood-based plates at the construction site, it has become common to precut wood-based plates in advance at a factory or the like according to the desired shape and size. Here, in precutting, for example, using a suction conveying device equipped with a suction pad, the wood-based plates stacked in multiple layers are automatically supplied to the next process one by one in a separated state, and are often automatically operated by a processing machine that performs processing such as cutting in the next process. However, for example, when precutting a breathable plate such as MDF (Medium Density Fiberboard), even if trying to adsorb only the topmost plate using a suction conveying device equipped with a suction pad, several plates below it will also be adsorbed together. Then, multiple plates will be supplied to the next process as one plate, so for example, the processing efficiency may decrease due to the automatic operation of the processing machine stopping.

[0003] For example, Patent Document 1 discloses a plate suction conveying device including a suction device capable of lifting by vacuum-adsorbing the topmost plate among the substantially horizontal plates stacked in a downward stepwise manner, a lateral displacement mechanism for laterally displacing the topmost plate with respect to the plates below the second plate, and a second pressing mechanism for pressing the second plate.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the sheet material adsorption and conveyance device disclosed in Patent Document 1, in order to take out the sheet materials one by one, facilities such as a lateral displacement mechanism and a second sheet pressing mechanism are required, and the equipment cost becomes high, so there is room for improvement.

[0006] The present invention has been made in view of such points, and an object thereof is to enable breathable sheet materials to be taken out one by one at low cost.

Means for Solving the Problems

[0007] In order to achieve the above object, a method for separating breathable sheet materials according to the present invention includes a placing step of placing a laminate in which a plurality of breathable sheet materials made of medium density fiberboard, particle board, volcanic glass multi-layer board, gypsum board or calcium silicate board are laminated on a placing surface, and a suction step of sucking and lifting the sheet material on the outermost surface of the laminate under reduced pressure. The method for separating breathable sheet materials is characterized in that, in the placing step, a spacer is installed between the placing surface and the laminate so that the central portion in the length direction of the laminate protrudes more than both end portions in the length direction of the laminate, together with the central portion in the width direction of the laminate protruding more than both end portions in the width direction of the laminate each sheet material constituting the laminate is elastically deformed so that the central portion in the length direction of the laminate protrudes more than both end portions in the length direction of the laminate, and in the suction step, while pressing the central portion in the length direction of the outermost surface sheet material, both end portions in the length direction of the outermost surface sheet material are sucked under reduced pressure, and the sheet material is lifted so that at least one of both end portions in the length direction of the sheet material is located above the central portion in the length direction of the sheet material.

[0008] According to the above method, first, in the placing step, a spacer is installed between the placing surface on which a laminate in which a plurality of breathable sheet materials are laminated is placed and the laminate, and the central portion in the length direction protrudes more than both end portions. together with the central portion in the width direction protruding more than both end portions thereofThe laminate is placed on the placement surface with each plate material elastically deformed as described above. Here, in a laminate generally composed of smooth and heavy plate materials, since the adjacent plate materials are in close contact with each other, the inside of the laminate is in a kind of decompressed state, so it is considered difficult to separate the plate materials. And in the placement process, on the outermost plate material of the laminate with each plate material elastically deformed, since no pressing force is applied from above, a force acts to return to the original planar state, and it is considered that the outermost plate material is in a state where it is easy to eliminate the decompressed state. Further, in the subsequent adsorption process, while pressing the central portion in the length direction of the outermost plate material of the laminate in the state where each plate material is elastically deformed in the placement process, both ends in the length direction are subjected to decompression adsorption, and the plate material is pulled up so that at least one of both ends in the length direction of the plate material is located above the central portion in the length direction of the plate material. Therefore, in the adsorption process, a gap is generated between at least one of both ends in the length direction of the first pulled-up plate material from above the laminate and both ends in the length direction of the second pulled-up plate material next from above the laminate, and air enters through the gap, thereby eliminating the decompressed state and separating the pulled-up plate material and the next pulled-up plate material. As a result, by simply installing a spacer between the placement surface and the laminate, the pulled-up plate material and the next pulled-up plate material can be separated, so that breathable plate materials can be taken out one by one at low cost. Here, in the adsorption process, since the outermost plate material of the laminate is subjected to decompression adsorption, for example, by bringing an adsorption pad connected to a decompression means such as a decompression fan or a decompression pump into contact with the surface of the plate material, the plate material can be easily adsorbed. Also, since the plate material is a medium density fiberboard, a particle board, a volcanic glassy multilayer board, a gypsum board, or a calcium silicate board, due to its breathability, for example, in recent years, medium density fiberboard (MDF: Medium Density Fiberboard), which is being applied to, for example, roof sheathing boards, can be precut in factories and the like in automatic operation 。

[0009] upper The spacer may be configured to support the laminate pointwise from the back surface.

[0010] According to the above method, in the placing step, spacers are installed so as to support the laminate in a dot-like manner from the back surface at each central portion in the length direction and the width direction between the placing surface and the laminate, that is, at a portion overlapping the central portion of the laminate in plan view. Thereby, in the length direction and the width direction, the laminate can be placed on the placing surface in a state where the central portion thereof protrudes more than both end portions thereof, that is, the central portion in plan view protrudes more than the peripheral end portions thereof, with each plate material elastically deformed.

[0011] In the above suction step, the shape seen from the direction orthogonal to the length direction of the uppermost plate material may change from convex upward to convex downward in the above placing step.

[0012] According to the above method, in the suction step, since the shape seen from the direction orthogonal to the length direction of the uppermost plate material of the laminate changes from convex upward to convex downward in the placing step, gaps are respectively formed between both end portions in the length direction of the first plate material pulled up from above the laminate and both end portions in the length direction of the second plate material pulled up next from above the laminate.

[0013] In the above suction step, the timing of sucking and pulling up one of both end portions in the length direction of the uppermost plate material and the timing of sucking and pulling up the other of both end portions in the length direction of the uppermost plate material may be different.

[0014] According to the above method, in the adsorption step, since the timing of adsorbing and lifting one of both ends in the length direction of the plate material on the outermost surface of the laminate is different from the timing of adsorbing and lifting the other of both ends, a time difference occurs in the time when gaps are respectively generated between both ends in the length direction of the first lifted plate material from the top of the laminate and both ends in the length direction of the second lifted plate material next from the top of the laminate. As a result, at both ends in the length direction of the first lifted plate material from the top of the laminate, the balance of the reduced pressure state with the second plate material adjacent to it is disrupted, so the first lifted plate material from the top of the laminate and the second lifted plate material next from the top of the laminate can be more surely separated from each other.

Advantages of the Invention

[0015] According to the present invention, in the placement step, a spacer is installed between the placement surface and the laminate to elastically deform each plate material constituting the laminate so that the central portion in the length direction of the laminate protrudes more than both ends thereof. In the adsorption step, while pressing the central portion in the length direction of the plate material on the outermost surface of the laminate, both ends thereof are adsorbed and lifted so that at least one of both ends in the length direction of the plate material is located above the central portion thereof. Therefore, it is possible to take out the breathable plate materials one by one at low cost.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiments.

[0018] 《First Embodiment》 Figs. 1 to 4 show a first embodiment of the method for separating a breathable plate material according to the present invention. Here, Fig. 1 is a front view showing the first half of the adsorption process of the method for separating a breathable plate material of this embodiment. Fig. 2 is a top view of the adsorption device Ma used in the adsorption process of the method for separating a breathable plate material of this embodiment. Fig. 3 is a top view of another adsorption device Mb used in the adsorption process of the method for separating a breathable plate material of this embodiment. Fig. 4 is a front view showing the second half of the adsorption process of the method for separating a breathable plate material of this embodiment.

[0019] First, the breathable plate material 10 separated by the method for separating a breathable plate material of this embodiment has breathability and, for example, is about 9.2 mm thick × 908 mm wide × 1818 mm long and has a density of 0.70 g / cm 3 or more and 0.85 g / cm 3 and is composed of MDF or the like. Note that examples of the breathable plate material 10 having breathability include, in addition to MDF, particle board, volcanic glass multi-layer board, gypsum board, calcium silicate board, and the like.

[0020] In addition, the plate material separation device used in the method for separating a breathable plate material of this embodiment includes a carry-in part C into which a plurality of breathable plate materials 10 are carried in as a laminate L, a carry-out part from which the breathable plate materials 10 are carried out one by one, and an adsorption transporter Ma that moves back and forth between the carry-in part C and the carry-out part, adsorbs and lifts the outermost breathable plate material 10 of the laminate L carried into the carry-in part C, and then transports it to the carry-out part.

[0021] As shown in FIGS. 1 and 4, the loading section C includes, for example, three rows of roller conveyors 20 provided so as to extend parallel to each other, and the plane connecting the uppermost portions of the circumferences of the rollers of the three rows of roller conveyors 20 serves as the placement surface S.

[0022] The unloading section is, for example, a preparation table for waiting for the air-permeable plates 10 one by one before being loaded into a processing machine that performs processing such as cutting in the next process, and sequentially feeding them out to the next process.

[0023] As shown in FIG. 2, the suction conveyor Ma includes a moving body D provided in a rectangular plate shape in plan view, and a first suction pad Pa, a second suction pad Pb, and a third suction pad Pc provided on the lower surface of the moving body D.

[0024] The moving body D is provided so as to be vertically movable and horizontally movable between the loading section and the unloading section.

[0025] The first suction pad Pa, the second suction pad Pb, and the third suction pad Pc are connected to a vacuum fan or the like, and are configured to contact the surface of the air-permeable plate 10 and suck the air-permeable plate 10. Here, the first suction pad Pa and the second suction pad Pb are configured to perform vacuum suction on both end portions in the length direction of the air-permeable plate 10, and the third suction pad Pc is configured to perform vacuum suction on the central portion in the length direction of the air-permeable plate 10.

[0026] In this embodiment, the suction conveyor Ma provided with the first suction pad Pa, the second suction pad Pb, and the third suction pad Pc on the lower surface of the moving body D is illustrated. However, a suction conveyor Mb provided with the first suction pad Pa, the second suction pad Pb, and a pressing pad Pd on the lower surface of the moving body D may also be used.

[0027] As shown in FIG. 3, the suction conveyor Mb includes a moving body D provided in a rectangular plate shape, and a first suction pad Pa, a second suction pad Pb, and a pressing pad Pd provided on the lower surface of the moving body D. Here, the first suction pad Pa and the second suction pad Pb are connected to a vacuum fan or the like, and vacuum-suck both end portions in the length direction of the breathable plate material 10, and the pressing pad Pd is configured to abut on the central portion in the length direction of the breathable plate material 10 and press the central portion in the length direction of the breathable plate material 10.

[0028] Next, a method for separating the breathable plate material according to the present embodiment using the plate material separating device having the above configuration will be described. The method for separating the breathable plate material according to the present embodiment includes a placing step and a suction step.

[0029] <Placing Step> First, a wooden spacer 25a made of a rod-shaped member, for example, having a thickness of about 15 mm, a width (lateral direction in FIG. 1) of 100 mm, and a length (depth direction in FIG. 1) of 1000 mm, is placed on the roller conveyor 20 located at the center of the three rows of roller conveyors 20 in the loading section C (see FIG. 1). The cross-sectional shape of the spacer 25a is, for example, square, rectangular, triangular, semi-circular, etc., and is not particularly limited. Also, the material of the spacer 25a is not particularly limited.

[0030] Subsequently, a stack L of about 100 breathable plate materials 10 (for example, MDF having a thickness of about 9.2 mm, a width (depth direction in FIG. 1) of 908 mm, and a length (lateral direction in FIG. 1) of 1818 mm) is placed on the placement surface S of the three rows of roller conveyors 20 via the spacer 25a. As a result, as shown in FIG. 1, each breathable plate material 10 is elastically deformed such that the central portion in the length direction (lateral direction in the figure) of the stack L protrudes more than both end portions thereof. Note that a floor board or the like may be installed at the lowermost portion of the stack L to physically protect the lowermost breathable base material 10.

[0031] <Suction Step> First, after moving the moving body D of the adsorption conveyor Ma above the laminate L placed on the loading section C, the moving body D is lowered so that, as shown in FIG. 1, the first adsorption pad Pa, the second adsorption pad Pb, and the third adsorption pad Pc of the adsorption conveyor Ma are brought into contact with the surface of the air-permeable plate material 10 on the outermost surface of the laminate L.

[0032] Subsequently, while adsorbing and holding the central portion in the length direction of the air-permeable plate material 10 by the third adsorption pad Pc, the both end portions in the length direction of the air-permeable plate material 10 are adsorbed by the first adsorption pad Pa and the second adsorption pad Pb, and as shown in FIG. 4, the air-permeable plate material 10 is pulled up so that both end portions in the length direction of the air-permeable plate material 10 are positioned above the central portion thereof. At this time, the shape seen from the direction orthogonal to the length direction of the outermost air-permeable plate material 10 changes from convex upward (see FIG. 1) to convex downward (see FIG. 4) in the above-described placement step.

[0033] Furthermore, after moving the moving body D of the adsorption conveyor Ma to the unloading section, the vacuum adsorption by the first adsorption pad Pa, the second adsorption pad Pb, and the third adsorption pad Pc is stopped, and the air-permeable plate material 10 is placed on the preparation table constituting the unloading section.

[0034] As described above, the air-permeable plate materials 10 can be taken out one by one from the laminate L. In the present embodiment, in the adsorption step, a separation method in which both end portions in the length direction of the air-permeable plate material 10 are simultaneously pulled up by the first adsorption pad Pa and the second adsorption pad Pb is exemplified. However, the timing of adsorbing and pulling up one of both end portions in the length direction of the air-permeable plate material 10 by the first adsorption pad Pa and the timing of adsorbing and pulling up the other of both end portions in the length direction thereof by the second adsorption pad Pb are different, and there may be a time difference of about 0.1 second to 2.0 seconds between those timings.

[0035] As described above, according to the method for separating the breathable plates of the present embodiment, first, in the placing step, a spacer 25a made of a rod-shaped member is installed at a portion that overlaps with the central portion in the length direction of the laminate L between the placing surface S on which the laminate L in which a plurality of breathable plates 10 having breathability are laminated is placed and the laminate L. As a result, the laminate L can be placed on the placing surface S in a state where each breathable plate 10 is elastically deformed so that the central portion in the length direction protrudes from both ends thereof. Here, in a laminate in which generally smooth and heavy plates are laminated, it is considered difficult to separate the plates because the adjacent plates are in close contact with each other and the inside of the laminate is in a kind of depressurized state. And in the placing step, since no pressing force is applied from above to the outermost breathable plate 10 of the laminate L in which each breathable plate 10 is elastically deformed, a force to return to the original planar shape acts, and it is considered that the outermost breathable plate 10 is in a state where it is easy to eliminate the depressurized state. Further, in the subsequent adsorption step, while pressing the central portion in the length direction of the outermost breathable plate 10 in the laminate L in a state where each breathable plate 10 is elastically deformed in the placing step, both ends thereof are adsorbed, and the breathable plate 10 is pulled up so that both ends in the length direction of the breathable plate 10 are located above the central portion thereof. Therefore, in the adsorption step, a gap is generated between both ends in the length direction of the first breathable plate 10 pulled up from above the laminate L and both ends in the length direction of the second breathable plate 10 pulled up next from above the laminate L, and air enters through the gap, so that the depressurized state is eliminated and the pulled-up breathable plate 10 and the next pulled-up breathable plate 10 are separated. As a result, by simply installing the spacer 25a between the placing surface S and the laminate L, the pulled-up breathable plate 10 and the next pulled-up breathable plate 10 can be separated, so that the breathable plates 10 having breathability can be taken out one by one at low cost.

[0036] Further, according to the method for separating the breathable plate material of the present embodiment, in the adsorption step, since the shape of the breathable plate material 10 on the outermost surface of the laminate L as viewed from the direction orthogonal to the length direction changes from convex upward to convex downward in the placement step, gaps are respectively formed between both ends in the length direction of the first breathable plate material 10 pulled up from above the laminate L and both ends in the length direction of the second breathable plate material 10 pulled up next from above the laminate L.

[0037] Further, according to the method for separating the breathable plate material of the present embodiment, in the adsorption step, when the timing of adsorbing and pulling up one of both ends in the length direction of the breathable plate material 10 on the outermost surface of the laminate L is different from the timing of adsorbing and pulling up the other of both ends in the length direction of the breathable plate material 10 on the outermost surface of the laminate, the balance of the depressurized state between both ends in the length direction of the first breathable plate material 10 pulled up from above the laminate L and the second breathable plate material 10 adjacent thereto from above is disrupted. Therefore, the first breathable plate material 10 pulled up from above the laminate L and the second breathable plate material 10 pulled up next from above the laminate L can be more reliably separated.

[0038] Further, according to the method for separating the breathable plate material of the present embodiment, in the adsorption step, since the breathable plate material 10 on the outermost surface of the laminate L is adsorbed under reduced pressure, for example, the first adsorption pad Pa, the second adsorption pad Pb, and the third adsorption pad Pc connected to a decompression means such as a decompression fan or a decompression pump are brought into contact with the surface of the breathable plate material 10, whereby the breathable plate material 10 can be easily adsorbed.

[0039] Further, according to the method for separating the breathable plate material of the present embodiment, since the breathable plate material 10 is made of MDF, due to its breathability, MDF, which has been increasingly applied to roof sheathing boards and the like in recent years, can be precut in an automatic operation in a factory or the like.

[0040] 《Second Embodiment》 Figure 5 shows a second embodiment of the method for separating a breathable sheet material according to the present invention. Here, Figure 5 is a front view showing the first half of the adsorption step of the method for separating a breathable sheet material of the present embodiment, and is a figure corresponding to Figure 1 described in the first embodiment. In the following embodiments, the same parts as those in Figures 1 to 4 are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

[0041] In the first embodiment, a method for separating a breathable sheet material using a spacer 25a made of a rod-shaped member was exemplified. In this embodiment, a method for separating a breathable sheet material using a spacer 25b made of a planar member will be exemplified.

[0042] The sheet material separating apparatus used in the method for separating a breathable sheet material of the present embodiment includes, as in the first embodiment, a loading section C into which a plurality of breathable sheet materials 10 are loaded as a laminate L, an unloading section from which the breathable sheet materials 10 are unloaded one by one, and an adsorption transporter Ma that travels back and forth between the loading section C and the unloading section, adsorbs and lifts the outermost breathable sheet material 10 of the laminate L loaded into the loading section C, and then transports it to the unloading section. Here, as shown in Figure 5, the loading section C of the present embodiment includes, for example, a mounting table 20b provided in a rectangular shape in plan view, and the surface of the mounting table 20b serves as a mounting surface S. In this embodiment, the adsorption transporter Ma is exemplified, but as in the first embodiment, the adsorption transporter Mb may also be used.

[0043] Next, the method for separating a breathable sheet material of the present embodiment using the sheet material separating apparatus having the above configuration will be described. The method for separating a breathable sheet material of the present embodiment includes a mounting step and an adsorption step.

[0044] <Mounting step> First, place a spacer 25b, such as an iron ball, made of a spherical curved surface member with a diameter of about 15 mm, on the mounting table 20b of the loading section C (see Fig. 5). Here, the spacer 25b is placed at the central portions in the length direction and width direction of the laminate L to be placed later, that is, at the portions overlapping the central portion in the plan view of the laminate L. In this embodiment, a spherical spacer 25b is exemplified, but the spacer 25b only needs to be configured to support the laminate L in a dot-like manner from the back surface. Thus, if its shape is convex upward, it may be, for example, hemispherical or the like, and is not particularly limited. Also, the material of the spacer 25b is not particularly limited.

[0045] Subsequently, place a laminate L of about 100 air-permeable plates 10 (for example, MDF with a thickness of 9.2 mm × width (depth direction in Fig. 5) of 908 mm × length (lateral direction in Fig. 5) of about 1818 mm) on the mounting surface S of the mounting table 20b via the spacer 25b. As a result, as shown in Fig. 5, the laminate L is elastically deformed such that its central portion in the length direction (lateral direction in the figure) and width direction (depth direction in the figure) protrudes more than its both end portions, that is, the central portion in the plan view protrudes more than its peripheral end portions. Note that a floor board or the like may be installed at the lowermost portion of the laminate L to physically protect the lowermost air-permeable base material 10.

[0046] <Adsorption step> First, after moving the moving body D of the adsorption conveyor Ma above the laminate L placed on the loading section C, lower the moving body D so that the first adsorption pad Pa, the second adsorption pad Pb, and the third adsorption pad Pc of the adsorption conveyor Ma contact the surface of the uppermost air-permeable plate 10 of the laminate L, as shown in Fig. 5.

[0047] Subsequently, while adsorbing and pressing the central portion of the breathable plate material 10 in the length direction by the third adsorption pad Pc, both end portions of the breathable plate material 10 in the length direction are adsorbed by the first adsorption pad Pa and the second adsorption pad Pb, and the breathable plate material 10 is lifted so that both end portions in the length direction of the breathable plate material 10 are positioned above its central portion (see Fig. 4). At this time, the shape of the outermost breathable plate material 10 as viewed from the direction orthogonal to the length direction changes from convex upward (see Fig. 5) to convex downward (see Fig. 4) in the placement step described above.

[0048] Furthermore, after moving the moving body D of the adsorption conveyor Ma to the unloading section, the vacuum adsorption by the first adsorption pad Pa, the second adsorption pad Pb, and the third adsorption pad Pc is stopped, and the breathable plate material 10 is placed on the preparation table constituting the unloading section.

[0049] As described above, the breathable plate materials 10 can be taken out one by one from the laminate L. In this embodiment, similar to the first embodiment, in the adsorption step, the separation method of simultaneously lifting both end portions in the length direction of the breathable plate material 10 by the first adsorption pad Pa and the second adsorption pad Pb is exemplified. However, the timing of adsorbing and lifting one of both end portions in the length direction of the breathable plate material 10 by the first adsorption pad Pa and the timing of adsorbing and lifting the other of both end portions in the length direction by the second adsorption pad Pb are different, and there may be a time difference of about 0.1 second to 2.0 seconds between these timings.

[0050] As described above, according to the method for separating the breathable plates of the present embodiment, first, in the placing step, a convex spacer 25b is installed on the placing surface S on which the laminate L in which a plurality of breathable plates 10 having breathability are laminated is placed so as to support the laminate L in a dot-like manner from the back surface at the central portions in the length direction and the width direction (the central portion in the plan view of the laminate L) and the portions that overlap in the plan view. As a result, in the length direction and the width direction, the laminate L can be placed on the placing surface S in a state where each breathable plate 10 is elastically deformed so that the central portion thereof protrudes more than both ends thereof. Here, generally, in a laminate in which smooth and heavy plates are laminated, since adjacent plates are in close contact with each other, the inside of the laminate is in a kind of depressurized state, so it is considered difficult to separate the plates. And in the placing step, since no pressing force is applied from above to the outermost breathable plate 10 of the laminate L in which each breathable plate 10 is elastically deformed, a force to return to the original planar shape acts, and the outermost breathable plate 10 is considered to be in a state where it is easy to eliminate the depressurized state. Further, in the subsequent adsorption step, while pressing the central portion in the length direction of the outermost breathable plate 10 in the laminate L in a state where each breathable plate 10 is elastically deformed in the placing step, both ends thereof are adsorbed, and the breathable plate 10 is pulled up so that both ends in the length direction of the breathable plate 10 are located above the central portion thereof. Therefore, in the adsorption step, a gap is generated between both ends in the length direction of the first breathable plate 10 pulled up from above the laminate L and both ends in the length direction of the second breathable plate 10 pulled up next from above the laminate L, and air enters through the gap, so that the depressurized state is eliminated, and the pulled-up breathable plate 10 and the next pulled-up breathable plate 10 are separated. Thereby, by simply installing the spacer 25a between the placing surface S and the laminate L, the pulled-up breathable plate 10 and the next pulled-up breathable plate 10 can be separated, so that the breathable plates 10 having breathability can be taken out one by one at low cost.In the method for separating the breathable sheet material of the present embodiment, since the reduced-pressure state is eliminated by air entering through the gaps on all four sides in the length direction and the width direction, the breathable sheet material 10 to be lifted up and the next breathable sheet material 10 to be lifted up can be more easily and reliably separated from each other than in the method for separating the breathable sheet material of the first embodiment in which air enters through the gaps on two sides in the length direction.

[0051] Further, according to the method for separating the breathable sheet material of the present embodiment, in the adsorption step, since the shape of the breathable sheet material 10 on the outermost surface of the laminate L as viewed from the direction orthogonal to the length direction changes from convex upward to convex downward in the placement step, gaps are respectively formed between both ends in the length direction of the first breathable sheet material 10 to be lifted up from above the laminate L and both ends in the length direction of the second breathable sheet material 10 to be lifted up next from above the laminate L.

[0052] Further, according to the method for separating the breathable sheet material of the present embodiment, in the adsorption step, when the timing of adsorbing and lifting one of both ends in the length direction of the breathable sheet material 10 on the outermost surface of the laminate L is different from the timing of adsorbing and lifting the other of both ends in the length direction of the breathable sheet material 10 on the outermost surface of the laminate, the balance of the reduced-pressure state between the breathable sheet material 10 adjacent thereto and the second breathable sheet material from above is disrupted at both ends in the length direction of the first breathable sheet material 10 to be lifted up from above the laminate L. Therefore, the first breathable sheet material 10 to be lifted up from above the laminate L and the second breathable sheet material 10 to be lifted up next from above the laminate L can be more reliably separated from each other.

[0053] Further, according to the method for separating the breathable sheet material of the present embodiment, in the adsorption step, since the breathable sheet material 10 on the outermost surface of the laminate L is adsorbed under reduced pressure, for example, the breathable sheet material 10 can be easily adsorbed by bringing the first adsorption pad Pa, the second adsorption pad Pb, and the third adsorption pad Pc connected to a reduced-pressure means such as a reduced-pressure fan or a reduced-pressure pump into contact with the surface of the breathable sheet material 10.

[0054] In addition, according to the method for separating the breathable plate material of the present embodiment, since the breathable plate material 10 is made of MDF, due to its breathability, in recent years, the MDF that has been increasingly applied to roof sheathing boards and the like can be pre-cut by automatic operation in a factory or the like.

[0055] 《Other Embodiments》 In the above first and second embodiments, as a method for separating the breathable plate material, a method for separating a rectangular breathable plate material in a plan view was exemplified. However, the present invention can also be applied to a method for separating a breathable plate material having a shape other than rectangular in a plan view.

[0056] In the above first and second embodiments, as a method for separating the breathable plate material, a method for separating MDF was specifically exemplified. However, as described above, the present invention can also be applied to a method for separating breathable plate materials such as particle board, volcanic glass multi-layer board (for example, trade name "Dailite (registered trademark)" manufactured by Daiwa Kogyo Co., Ltd.), gypsum board, and calcium silicate board.

Industrial Applicability

[0057] As described above, the present invention is extremely useful because it can take out breathable plate materials one by one at low cost.

Explanation of Reference Numerals

[0058] L laminate S placement surface 10 breathable plate material 25a, 25b spacer

Claims

1. A step of placing a laminate on a placement surface, the laminate being made of a plurality of breathable board materials made of medium density fiberboard, particle board, volcanic vitreous laminate, gypsum board, or calcium silicate board; and a suction step of suctioning and lifting the outermost plate material of the laminate by vacuum suction, In the placing step, a spacer is placed between the placing surface and the laminate, and each plate material constituting the laminate is elastically deformed so that a central portion of the laminate in a longitudinal direction protrudes beyond both ends of the laminate in a longitudinal direction and a central portion of the laminate in a width direction protrudes beyond both ends of the laminate in a width direction; The method for separating breathable plate material is characterized in that in the adsorption process, both ends of the outermost plate material in the longitudinal direction are adsorbed under reduced pressure while the longitudinal center of the outermost plate material is held down, and the plate material is pulled up so that at least one of both ends in the longitudinal direction of the plate material is positioned higher than the longitudinal center of the plate material.

2. The method for separating an air-permeable board material according to claim 1, A method for separating breathable plate materials, characterized in that the spacers are configured to support the laminate in a point-like manner from its back surface.

3. The method for separating an air-permeable plate material according to claim 1 or 2, A method for separating breathable plate materials, characterized in that in the adsorption step, the shape of the outermost plate material as viewed in a direction perpendicular to the longitudinal direction thereof changes from an upwardly convex shape as in the placing step to a downwardly convex shape.

4. The method for separating an air-permeable plate material according to claim 1 or 2, The method for separating breathable plate material is characterized in that, in the adsorption process, the timing at which one of both longitudinal ends of the outermost plate material is adsorbed under reduced pressure and lifted is different from the timing at which the other of both longitudinal ends of the outermost plate material is adsorbed under reduced pressure and lifted.

Images