JP2005282094A - Projected corner column and device for applying chamfering work to projected corner column - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of a sense of incompatibility in a chamfering work part 15, by forming a shadow similar to a shadow generated in a surface recess-projection handle part 4a in the chamfering work part 15, by making the chamfering work part 15 maximally inconspicuous in an apex angle part 13 of a projected corner column 1. <P>SOLUTION: The chamfering work part 15 having a narrow width is formed in the apex angle part 13 of the projected corner column 1. The chamfering work part 15 is formed into a recess-projection surface 15 having an irregular recess-projection such as corresponding to the surface recess-projection handle part 4a, not to a flat surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projected corner column used as an exterior material of a projected corner portion of a building wall surface, and an apparatus for chamfering the apex corner portion thereof.

  In general, an exterior corner column 1 as shown in FIG. 8 is known as an exterior material used for an exterior corner portion of a wall surface of a building (see, for example, Japanese Patent Application Laid-Open No. 2000-310024). As shown in FIG. 9a, a ceramic building board 5 having a groove (longitudinal joint 2, lateral joint 3) and a convex region 4 defined by the groove is usually used to manufacture the protruding corner column 1. Then, it is cut at the cutting position S avoiding the vertical joint 2 to make the plate pieces 10, 10 (FIG. 9b). Cut one side 11, 11 of each plate piece obliquely (often at an angle of 45 degrees, but not limited to this), and bond the cut surfaces 12, 12 so as to have apex corners 13. It joins with an agent and it is set as a cross-sectional substantially L shape (FIG. 9c).

  The ceramic building board 5 that is the original plate is usually positioned when the surface uneven pattern portion 4a is formed in the convex region 4, the shape variation of the cut surface 12, and the cross-section substantially L-shaped when bonded with an adhesive. For reasons such as the occurrence of some misalignment, it is difficult to fix and integrate in a substantially L shape with the end of the cut surface perfectly overlapped at the ridge line portion of the apex corner portion 13, usually as shown in FIG. As shown in the right figure, there is a portion that looks like a squeaker that the tip of one plate piece 10 protrudes. Further, the protruding portion a of the adhesive is likely to occur at that portion. Even where the tips of the cut surfaces are exactly overlapped, as shown in the left view of FIG. 9c, the protruding portion a of the adhesive may be formed.

  As a result, the appearance of the apex angle portion is deteriorated. Therefore, the apex angle portion 13 is chamfered by mechanical means such as a tenoner cutting machine in order to adjust the shape of the apex angle portion 13. In the conventional chamfering process, the cutting surface 14 is a wide flat surface having a width of about 10 mm to 20 mm, and the chamfered portion (the cutting surface 14) has a color different from the surface of the plate piece 10, Paint is applied separately. In the thing of patent document 1, it replaces with coating and it is made to stick the transfer foil which concerns on the thermal transfer sheet of the pattern and color substantially the same as the pattern and color of a board piece surface.

  Patent Document 2 (Japanese Patent Laid-Open No. 6-299677) describes a method for manufacturing a corner tile. Here, when chamfering the edge of the butt portion of the corner tile fixed in an L shape, the butt portion is made inconspicuous by changing the roughness of the grindstone in a stepwise manner. Trying to get.

JP 2000-310024 A Japanese Patent Application Laid-Open No. 6-299677

  As described above, in the conventional protruding corner column, the chamfering process is performed on the apex portion using a device such as a tenoner cutting machine, and the cutting surface is used to remove the protruding portion of the adhesive that cannot be calculated. Is a flat and wide surface (about 10 mm to 20 mm). In particular, when the deep surface irregularity pattern portion 4a is formed in the convex region 4 on the surface of the building board, the chamfered cut surface has to be wider for safety measures that do not deteriorate the appearance.

  Since the ground color of the board piece 10 (ceramic building board 5) appears on the cut surface, it is painted after the cutting process so as to be in harmony with the surface pattern, but it is a wide surface of about 10 mm to 20 mm. Therefore, even if it is painted, it is easily noticeable, and since it is a flat surface, the shadow is monotonous, and it is inevitably different from the shadow of the convex region 4 or the surface uneven pattern portion 4a formed there. As described in Patent Document 1, when a transfer foil related to a thermal transfer sheet with a pattern and color that is almost the same as the pattern of a plate piece is attached to a chamfered portion, the continuity of the pattern at a long distance is ensured. Even if it can, the difference in shading cannot be avoided as long as the transfer sheet is flat. Moreover, it is not easy to prepare such a transfer sheet.

  In Patent Document 2, the roughness of the grindstone is finely changed step by step to make the butt portion inconspicuous. If it is applied to the apex corner portion of the protruding corner column formed in (1), the ground color of the ceramic board will come out in a wide range, which is not preferable. Further, the polished surface is a flat surface, and inconvenience to the difference in shadow cannot be avoided even if painting is performed.

  The present invention has been made in view of the circumstances as described above, and makes the chamfered portion of the apex portion of the protruding corner column as inconspicuous as possible, and the surface uneven pattern portion formed in the convex region in the chamfered portion. And a device for chamfering the chamfered portion at the apex angle portion of the protruding corner column so that the chamfered portion does not cause a sense of incongruity. Objective.

  An exit corner column according to the present invention is an exit corner column formed by joining at least two plate pieces so that one side thereof has an apex portion, and the apex portion has a width. A narrow chamfered portion is formed, and the chamfered portion is not a flat surface but an irregular surface having irregular irregularities.

  In the present invention, it is preferable to use a plate piece that constitutes the protruding corner pillar, which is cut from a conventionally known ceramic building board into a plate piece having an appropriate width, but is not limited thereto. In the protruding corner column according to the present invention, the chamfered portion formed in the apex portion is narrow and has an uneven surface. Therefore, the discomfort due to the difference in color tone can be reduced by applying a required coating that approximates the surface pattern of the plate piece to the chamfered portion. Moreover, since it is an uneven surface, when a board piece has a surface uneven | corrugated pattern part, the shadow approximated to the shadow produced there can be produced | generated in a chamfering process part. As a result, the existence of the chamfered portion becomes inconspicuous.

  Preferably, as the plate piece constituting the protruding corner column, a groove portion and a convex region partitioned by the groove portion are formed on the surface, and a surface uneven pattern portion is formed in the convex region. Thereby, a protruding corner column with high design that is well harmonized with the uneven surface of the chamfered portion is obtained. Further, as a plate piece constituting the protruding corner column, a plate having a groove portion in the direction intersecting the apex angle portion on the surface, a concave portion corresponding to the groove portion formed in the apex angle portion of the protruding corner column, and The connection surface with the chamfered portion formed at the apex portion is curved. In this configuration, the continuity between the groove and the convex region on the surface of the plate piece and the chamfered portion at the apex corner is further ensured, and the design is further improved.

  In the protruding corner column according to the present invention, the side opposite to the side forming the apex portion of the plate piece (the end face) may be left as a vertical cut surface, and the surface at the end face You may make it form a chamfering part in a side ridgeline. By chamfering the mouth end surface, it is possible to ensure continuity in appearance with the ceramic building board on the building body side.

  In the present invention, the uneven surface when “the chamfered portion is not a flat surface but an uneven surface” is not an uneven surface having unevenness in a microscopic sense, but a fingertip. An irregular surface having irregular irregularities that can be confirmed by touching is used, and more specifically, an irregular surface having irregular irregularities whose depth or height is about 0.3 to 5 mm from the lowest part. Say. When the plate piece, which is the material of the protruding corner pillar, has a convex region as described above and has a surface uneven pattern portion in the convex region, the unevenness formed on the surface uneven pattern portion (usually 0) An uneven surface having unevenness of about 3 to 5 mm in depth or height. Moreover, the width | variety of a chamfering process part has the problem of the sagging at the time of coating, and the blur of a process process, 7 mm or less is preferable, More preferably, it is 2-5 mm, More preferably, it is 2-3 mm.

  The present invention is also an apparatus for chamfering the apex corner portion of the protruding corner column formed by joining at least two plate pieces with the apex corner portions on the sides in the longitudinal direction. A protruding corner column supporting means for supporting the protruding corner column in a horizontal posture with at least the apex angle portion exposed, and an apex angle in contact with the apex angle portion of the protruding corner column supported by the protruding corner column supporting means. Chamfering means provided with a cutting part for chamfering the part, chamfering means support means for supporting the chamfering means so as to be movable up and down through an elastic body with respect to the fixed machine frame, and corner support Disclosed is an apparatus for chamfering an exit corner column, characterized in that it comprises at least moving means for providing relative movement between the means and the chamfering means. The cutting part of the chamfering means may be arbitrary, but the air grinder is particularly effective.

  By using the above-mentioned apparatus, the protruding corner column according to the present invention can be easily manufactured. At the time of manufacture, first, an outgoing corner column formed by joining at least two plate pieces so that the longitudinal sides thereof have apex portions is prepared in the same manner as in the prior art. The prepared corner pillar is attached to the corner support means in such a posture that the apex portion is exposed upward, for example.

  The cutting portion of the chamfering means is brought into contact with the apex portion of the protruding corner column supported by the protruding corner column supporting means, and relative movement is given to the protruding corner column supporting means and the chamfering processing means. Preferably, the chamfering means is fixed and the protruding corner column supporting means is moved so that the entire ridge line portion of the apex corner portion of the protruding corner column passes through the cutting portion of the chamfering processing means. The chamfering means may be moved, and the corner support means may be fixed, or both may be moved in opposite directions. Both may be moved in the same direction with a speed difference.

  The apparatus according to the present invention comprises chamfering means supporting means for supporting the chamfering means so as to be movable up and down with respect to the fixed machine frame via an elastic body. The entire weight is supported by the elastic body, and the chamfering means is maintained in a floating state, and the chamfering means is in contact with the machine frame according to the contact mode between the cutting portion and the apex corner of the protruding corner column. Move up and down. In addition, by selecting the weight of the chamfering means, the length of the elastic body, and the spring constant, the positioning of the cutting part in the vertical direction with respect to the apex part of the protruding corner column to be machined when in the non-contact state body When the apex angle portion of the protruding corner column and the cutting portion are in contact with each other, the load applied to one of the other and the amount of variation thereof can be appropriately set.

  The cutting part is set so as to be positioned lower than the apex part of the protruding corner column by a certain distance in a non-contact state. In this state, the cutting portion is raised, the protruding corner column supporting means is moved, and the protruding corner column is put under the cutting portion, and then the cutting portion and the apex corner portion of the protruding corner column are brought into contact with each other. In this state, the protruding corner column is moved in the direction of the ridgeline of the apex portion (as described above, the protruding corner column may be fixed and the chamfering means may be moved). By this movement, the cutting portion cuts (chamfers) the ridge line portion of the apex corner portion while moving up and down in a shape of tracing the unevenness generated at the apex corner portion. As a result, a concavo-convex surface having a shape that traces the concavo-convex portion originally possessed by the apex portion is formed on the ridge line portion of the protruding corner column after chamfering.

  Cutting depth by appropriately setting the spring constant of the elastic body according to the hardness of the apex corner of the protruding corner column to be chamfered or depending on the shape of the adhesive protruding and solidified in some cases Alternatively, the degree of unevenness can be adjusted as appropriate. In addition, since the cutting depth and the flatness of the cutting surface change depending on the relative speed difference between the protruding corner column and the cutting part and the rotational speed when a rotating grinder is used as a cutting tool, the chamfering to be obtained An elastic body having an optimal spring constant is selected experimentally or by calculation according to the width of the processed portion and the degree of unevenness.

  When chamfering a plurality of protruding corner pillars is performed continuously with a fixed setting, there is a mixture of protruding corner pillars where the deviation of the plate pieces at the top corner is too large for the convenience of making the protruding corner pillar. In such a case, the chamfering process may be completed only by cutting the protruding ridge line portion of such a protruding corner column. As a countermeasure, if there is a ridge part protruding beyond the specified value on the upstream side in the feed direction of the protruding corner column from the cutting part, a fixed cutting tool is provided to cut and remove it. Also good.

  In a preferred embodiment of the protruding corner column of the present invention, the adhesive for bonding the plate pieces is a moisture curable adhesive. As the moisture curable adhesive, a moisture curable urethane resin adhesive is particularly preferable. In the case of a ceramic building board in which the slab pieces that make up the small corner pieces are mixed with chips, the hydroxyl groups present in the chips contribute to the polymerization and curing of the adhesive. Therefore, it is particularly preferable that the adhesive is a moisture curable urethane resin adhesive.

  As a more preferred embodiment, it is desirable to provide water in a mist form on the cut surface or apex portion of the plate piece and in the vicinity thereof before the adhesive is cured. The mist of moisture easily penetrates into the inside of the plate piece from the cut surface of the plate piece, and is caused by the moisture penetrated inside to accelerate the curing of the moisture curable urethane resin adhesive, thereby rapidly expanding. As a result of entering and hardening inside the plate pieces, the adhesive bonding between the plate pieces proceeds more firmly.

  In addition, after applying moisture-curing urethane resin adhesive, if water is sprayed in a mist state, when not spraying water, the uncured adhesive protrudes from the apex corner when the pieces are joined to each other. If the water is sprayed in a mist, the polymerization and curing of the adhesive proceeds early due to the hydroxyl groups of the sprayed water, preventing dripping of the adhesive and preventing deterioration of the appearance. Effect. It is desirable to use high frequency heating for curing the adhesive.

  According to the present invention, the chamfered portion at the apex portion of the protruding corner column is made as inconspicuous as possible, and the chamfered portion is formed in the chamfered portion so as to have a shadow similar to the shadow generated on the surface uneven pattern portion. You can get a corner that doesn't cause a sense of incongruity. Further, by making the chamfered portion an irregular surface having irregular irregularities, even if the chamfered portion has a slightly wide portion, a sense of incongruity can be eliminated.

  The present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of an apparatus for chamfering a protruding corner column according to the present invention as viewed from a direction orthogonal to the feeding direction of the protruding corner column, and FIG. 2 is a view parallel to the feeding direction. FIG. 3-6 is a figure for demonstrating the protruding corner pillar after the chamfering process manufactured using the said apparatus.

  The apparatus according to the present invention shown in FIGS. 1 and 2 includes a protruding corner column support means 20 having a feed roller 21, a chamfering means 30 having an air grinder 31, and a chamfering means support means having a coil spring 41 as an elastic body. 40, and the protruding corner column 1 supported by the protruding corner column support means 20 by operating the feed roller 21 moves relative to the chamfering processing means 30 fixedly provided. Therefore, in this example, the protruding corner column support means 20 also serves as a moving means that gives relative movement to the protruding corner column support means 20 and the chamfering processing means 30. Although not shown, the same effect can be obtained by fixing the protruding corner column supporting means 20 and moving the chamfering means 30 by appropriate means.

  In this example, the protruding corner column support means 20 has a plurality of feed rollers 21 arranged in the horizontal direction, and a flat belt 22 is wound around the whole to stabilize the feed. In the same manner as in the conventional method, the protruding corner column 1 having a substantially L-shaped cross section is placed on the feed roller 21 so that the apex portion 13 is exposed upward, and the feed roller 21 is shown in FIG. By rotating in the direction, the protruding corner column 1 is transferred in the direction of arrow A. In order to stabilize the feeding of the protruding corner column 1, it is desirable to provide a pressing roll 23 as shown in FIG. 2, but it may be omitted.

  A column 43 standing on a fixed machine frame 42 is provided on the side of the protruding corner column supporting means 20, and a block 32 constituting a part of the chamfering processing unit 30 is movable up and down with respect to the column 43. It is attached. The block 32 is for applying a necessary load necessary for cutting to the chamfering means 30, and an appropriate weight is selected according to the actual machine. The block 32 is provided with a pneumatic rotating device 33 connected to an appropriate pneumatic source, and an air grinder 31 is attached to the tip of the pneumatic rotating device 33 so that the rotational axis C is in the horizontal direction. As shown in FIG. 1, the direction of the axis C of the air grinder 31 is a direction orthogonal to the feed direction A of the protruding corner column 1, and the apex angle portion 13 of the protruding corner column 1 to which the cutting region 31 a is fed. It rides in a state perpendicular to the ridgeline direction.

  Between the fixed machine frame 42 and the block 32, a coil spring 41 that is extrapolated to the column 43 is arranged. The strength (spring constant) of the coil spring 41 is such that when the block 32 is placed on the coil spring 41 in a free state, the level L1 on the lowermost surface of the air grinder 31 is the apex portion of the protruding corner column 1 to be transferred. The level is adjusted to be lower than the level L2 of 13 by a predetermined distance h (position P1 in FIG. 2). Actually, when chamfering is continuously performed on a large number of protruding corner columns 1, the level L <b> 2 of the apex corner 13 slightly changes in each protruding corner column. Therefore, the predicted average value is used as the level L2.

  With the air grinder 31 rotated at, for example, about 25000 rpm, the protruding corner column 1 is fed. Since the block 32 receives an upward force from the coil spring 41 and can easily move upward, the block 32 can automatically ride on the apex portion 13 of the outgoing corner column 1 that is sent. . Of course, it may be lifted upward in advance by appropriate means.

  In the state where the air grinder 31 is on the apex 13 as indicated by P2 in FIG. As described above, the load acting on the cutting surface of the air grinder 31 (that is, the apex angle portion 13) is reduced due to the presence of the coil spring 41, and the air grinder 31 traces the irregularities generated in the apex angle portion 13. The ridge line portion of the apex corner portion 13 is cut (chamfered) while moving up and down. As a result, an uneven surface having a shape that traces the unevenness that the apex angle portion 13 originally had is formed on the ridge line portion of the protruding corner post 1 after chamfering.

  In the above apparatus, by appropriately setting the spring constant of the coil spring 41 in accordance with the hardness of the apex portion 13 of the protruding corner column 1 to be chamfered, the depth of cutting or the degree of unevenness is appropriately adjusted. it can. Moreover, since the cutting depth and the flatness of the cutting surface also change depending on the feed speed of the protruding corner column 1 and the rotation speed of the air grinder 31, an experiment is performed according to the width of the chamfered portion to be obtained and the degree of unevenness. Alternatively, the coil spring 41 having the optimum spring constant may be selected by calculation or calculation. In general, when the rotational speed of the air grinder 31 is slow, deep irregularities are formed, and when the rotational speed is fast, minute (shallow) irregularities are formed. In addition, the feed rate is typically about 1 m / second, but when the speed is low, deep irregularities are formed, and when the speed is high, minute (shallow) irregularities are formed.

  In FIG. 2, reference numeral 35 denotes a fixed cutting tool fixed to a machine frame disposed upstream of the air grinder 31 in the feed direction of the protruding corner column 1. The fixed cutting tool 35 is set at a position slightly higher than the level L2 (average level) of the apex portion 13 of the protruding corner column 1 to be transferred. An air grinder or a cutting tool such as a tenoner cutter may be used. By arranging such a fixed cutting tool 35, it becomes possible to cut the portion in advance when a protruding corner column having a ridge line portion protruding beyond the specified value has been sent, It is possible to avoid the chamfering process from being finished by cutting only the ridge line portion from which the air grinder 31 that moves up and down protrudes.

  Next, the protruding corner column 1 manufactured by the above apparatus will be described. FIG. 3 is a side view of the protruding corner column 1 made as described with reference to FIG. 9 and shows a state before chamfering. A moisture-curing adhesive (for example, a moisture-curing urethane resin adhesive) is suitably used for joining the two plate pieces 10, 10 constituting the protruding corner column 1. Adhesion techniques are preferably used. Although not shown, after joining the two plate pieces 10 and 10, the moisture curing type urethane resin is bonded by spraying water to the apex and the vicinity thereof in addition to the cutting surface and the vicinity thereof. Since the polymerization and curing of the agent can be promoted, it is possible to effectively prevent the adhesive protruding from the apex portion from sagging along the surface of the plate side 10 and impairing the design of the surface, and to firmly solidify the adhesive. Can be

  Further, in the illustrated example, the plate piece 10 has a plurality of groove portions 3 (horizontal joint portions 3 in FIG. 9 a) and a plurality of convex regions 4 partitioned by the groove portions 3. A surface concavo-convex pattern portion 4a of about 0.3 mm to 5 mm is formed. Therefore, as shown in the figure, the ridge line portion of the apex corner portion 13 has unevenness due to the surface uneven pattern portion 4a formed in the convex region 4, and the apex angle portion 13a corresponding to the groove portion 3 is the groove portion. It is a position lower than the ridge line portion of the apex corner 13 by a depth of 3. In FIG. 3, reference numeral 13b denotes a ridge line portion (see also FIG. 4) of the plate piece 10 located on the opposite side. FIG. 4 schematically shows a cross section of the protruding corner column 1. As described above, the apex portion 13 has the above-described irregularities in the ridge line direction and the deviation S at the tips of the left and right plate pieces 10, 10. There is also a protruding portion a of the adhesive.

  The protruding corner column 1 in this state is placed on the protruding corner column supporting means 20 of the above-described apparatus, and the apex corner portion 13 is chamfered. For the reasons already described, the air grinder 31 is Since the ridge line portion of the apex corner portion 13 is cut (chamfered) while moving up and down in the form of tracing the unevenness generated in the ridge 13, as shown in FIG. An uneven surface 15 having a narrow width (for example, about 2 mm to 5 mm) and a shape that traces the unevenness originally included in the apex angle portion 13 is formed in the portion. When the hardened adhesive comes out from the joint surface of the apex corner portion 13, the air grinder 31 moves up and down due to the contact with the adhesive, and the concave and convex shape of the concave and convex surface 15 has the initial apex corner portion 13. It may change to a different state from the unevenness that was done.

  Thereafter, the chamfered portion is appropriately coated to form a protruding corner column. However, the discomfort due to the difference in color tone can be reduced by applying the required coating approximate to the surface uneven pattern portion 4a. Further, since the uneven surface 15 allows the chamfered portion to generate a shadow that approximates the shadow generated in the groove portion 3 and the surface uneven pattern portion 4a of the plate piece 10, the presence of the chamfered portion is inconspicuous. It becomes.

  When the deviation S (see FIG. 4) at the tips of the left and right plate pieces 10 and 10 is large, a portion that protrudes greatly can be obtained by using a device to which the fixed cutting tool 35 is attached as shown in FIG. It becomes possible to cut in advance by a predetermined height, and it is possible to obtain a protruding corner column having a chamfered portion with an uneven surface 15 almost as desired.

  6a to 6c are diagrams corresponding to FIG. 2 and schematically showing an example in the case of performing chamfering with the above-described apparatus. In the case of FIG. 6a, it is assumed that the lowermost surface of the air grinder 31 is at the level L1 before the chamfering starts, and the average height of the apex portion 13 of the protruding corner column 1 to be processed is the level L2. Suppose that First, the air grinder 31 comes into contact with the front end face 16 of the protruding corner column 1 and rises to the ridgeline of the apex corner 13 while cutting the air grinder 31. The front end face 16 is cut into a rounded state (curved surface) by the rise.

  As described above, the apex portion 13 is narrow so as to trace the unevenness formed on the ridge line mainly due to the pattern of the surface unevenness pattern portion 4a formed in the convex region 4 as described above. It is shaved with a width and is a chamfered portion as an uneven surface. When reaching the apex angle portion 13 a corresponding to the groove portion 3 of the plate piece 10, the air grinder 31 gradually descends, and the connection surface with the chamfered portion formed in the apex angle portion 13 is a curved cutting surface 17. Is done. In the example shown in the figure, the level L3 of the apex angle portion 13a corresponding to the groove portion 3 is at a position lower than the level L1, and the air grinder 31 does not cut while passing through the level L3. When the air grinder 31 further moves and reaches the opposite side of the apex angle portion 13a, the air grinder 31 gradually rises again while cutting and rides on the ridge line of the apex angle portion 13. Therefore, the connection surface between the apex angle portion 13a and the apex angle portion 13 is also a curved cutting surface 17. Such a processing mode is repeatedly performed over the entire ridgeline. Since the curved connecting portion (cutting surface 17) is formed between the apex corner portion 13 and the apex corner portion 13a as described above, the handle pattern of the projected corner pillar to be manufactured shows high continuity. Thus, the chamfered portion can be made inconspicuous.

  In the case of FIG. 6b, before the chamfering process is started, the lowermost surface of the air grinder 31 is slightly below the level L2, which is the average height of the apex portion 13 of the protruding corner column 1 to be processed. It is at the position of level L4. In this case, as shown in the figure, the air grinder 31 cuts only the vicinity of the tip end of the apex corner portion 13 of the projecting corner column 1, and the apex corner portion 13 a corresponding to the groove portion 3 of the plate piece 10 and the apex portion. No roundness is formed on the connection surface with the corner 13.

  In the case of FIG. 6c, before the chamfering process starts, the lowermost surface of the air grinder 31 is a level that is the height of the apex part 13a corresponding to the groove part 3 of the plate piece 10 in the protruding corner column 1 to be processed. The position is lower than 3 (level L5). In this case, the apex angle portion 13 is cut deeper as a whole than in the case of FIG. 6a, and the apex angle portion 13a corresponding to the groove 3 is also cut into a curved surface. The connecting portion between the portion and the ridge line of the apex corner portion 13 is also curved.

  In the above-described embodiment, as the protruding corner column 1, the two plate pieces 10 and 10 have the same size and have apex portions 13 that intersect at an angle of 90 degrees. Although chamfering is performed, this is an example of the protruding corner column 1 and there are many other forms. FIG. 7 schematically shows a cross section thereof, and the protruding corner column 1a of FIG. 7a is different from the above in that the widths of the two plate pieces 10 and 10a are different. The protruding corner column 1b of 7b sandwiches the second plate piece 10P between the two plate pieces 10 and 10, and has two apex portions 13 and 13 although it is one protruding corner column. Is different from the above.

  As shown in FIG. 7C, the protruding corner column 1 c is formed by joining three plate pieces 10 in a U shape and has two apex portions 13. The protruding corner column 1d in FIG. 7d has the second plate piece 10P sandwiched between the plate pieces of the protruding corner column 1c, and has four apex corners 13 though it is one protruding corner column. doing.

  It is natural that the chamfered portion can be made inconspicuous by chamfering the apex angle portion 13 of the protruding corner pillars 1a, 1b, 1c, and 1d in the above manner in the same manner as described above. .

  7e also forms a chamfered portion on the surface side ridge line 13P on the side (cut face) 12a opposite to the side forming the apex corner 13 of the plate pieces 10, 10. FIG. This is different from the above. Thus, the continuity in appearance with the ceramic building board on the building body side can be ensured by chamfering the end face 12a.

Schematic which shows one form of the apparatus which performs a chamfering process on the protruding corner column by this invention seen from the direction orthogonal to the feeding direction of the protruding corner column. Schematic which shows the apparatus shown in FIG. 1 seeing from the direction parallel to the feed direction of a protruding corner pillar. The side view which shows the state before the chamfering process of a protruding corner column. FIG. 4 is a diagram schematically showing a cross section of a protruding corner column shown in FIG. 3. The figure for demonstrating the protrusion corner column after a chamfering process. It is a figure which shows an example in the case of performing chamfering with the apparatus by this invention typically, and is a figure corresponded in FIG. The figure which shows the other form of a protruding corner pillar. The figure which shows an example of the conventional protruding corner pillar. The figure for demonstrating an example of how to make a corner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Out corner pillar, 2 ... Vertical joint part, 3 ... Horizontal joint part (groove part of a board piece), 4 ... Convex area, 4a ... Surface uneven | corrugated pattern part, 5 ... Ceramic building board, 10 ... Board piece, 11 ... side Sides, 12 ... cut surface, 13 ... apex portion of the protruding corner column, 14 ... cutting surface, 13a ... apex portion located in the groove, 15 ... chamfered portion (uneven surface), 16 ... front end of the protruding corner column Surface, 17 ... a curved cutting surface between a chamfered portion formed at the apex corner and the apex portion located in the groove, 20 ... protruding corner column support means, 21 ... feed roller, 22 ... flat belt, DESCRIPTION OF SYMBOLS 23 ... Press roll, 30 ... Chamfering means, 31 ... Air grinder, 32 ... Block, 33 ... Pneumatic rotary device, 40 ... Chamfering means support means, 41 ... Coil spring as an elastic body, 42 ... Machine frame, 43 ... Column, L1, L4, L5 ... Level of the bottom surface of the air grinder, L2 ... Vertical angle of the protruding corner column to be transferred Level of

Claims (9)

  A corner pillar formed by joining at least two plate pieces so that one side thereof has an apex portion, and a narrow chamfered portion is formed at the apex portion. And the chamfered portion is not a flat surface but an irregular surface having irregular irregularities.   2. The surface of the plate piece constituting the protruding corner column is formed with a groove and a convex region partitioned by the groove, and a surface uneven pattern portion is formed in the convex region. Out corner pillar described in.   A groove portion in a direction intersecting with the apex corner portion is formed on the surface of the plate piece constituting the protruding corner column, and a recess corresponding to the groove portion of the apex corner portion and a chamfered portion formed at the apex angle portion, 2. The protruding corner column according to claim 1, wherein the connection surface of the projection is curved.   2. The protruding corner column according to claim 1, wherein a chamfered portion is formed on a surface side ridge line of a side opposite to the side forming the apex of the plate piece.   The protruding corner column according to any one of claims 1 to 4, wherein the adhesive for bonding the plate pieces is a moisture curable adhesive.   6. The protruding corner column according to claim 5, wherein water is supplied to the end portion or apex portion and the vicinity thereof before the adhesive is cured, and then the adhesive is cured.   7. The protruding corner column according to claim 5, wherein the adhesive is cured using high-frequency heating. An apparatus for chamfering the apex corners of the protruding corner columns formed by joining at least two plate pieces with the apex corners of the longitudinal sides thereof,
A projected corner column supporting means for supporting the projected corner column in a horizontal posture with at least the apex portion exposed;
The chamfering means for chamfering the apex corner by abutting the apex corner of the protruding corner column supported by the extruding column support means and the chamfering means can be moved up and down via an elastic body with respect to the fixed machine frame. Chamfering means supporting means for supporting, and
A moving means for providing relative movement between the protruding corner column supporting means and the chamfering means;
A device for chamfering a protruding corner column characterized by comprising:   9. The apparatus for chamfering a protruding corner column according to claim 8, wherein the chamfering means includes an air grinder.

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