JP5355265B2 - Method of joining plate materials with separated scarf - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform excellent joining even when there are errors in the thickness of veneers or a superimposed state of scarf surfaces. <P>SOLUTION: Veneers A1, A2 are superimposed in such a manner that, scarf surfaces a2 (a1) of separated scarf shapes having a large number of grooves y1 are meshed with each other via an adhesive (not shown). Using a pair of pressure members 1, 2 provided with pressurizing faces 2a (1a) having lengths L1, L2 nearly equal to the projection length L of the scarf surfaces a2 (a1) with respect to the front and the rear side of the veneers and having widths W2 (W1) larger than the width W of the veneers and a heating function or a cooling function suitable for the characteristics of the adhesive, the superimposed scarf surfaces a2 (a1) are hot-pressed or cold-pressed from the front and the rear side of the veneers. Consequently, in curing the adhesive, the shape of the part oppositely facing the end part of each veneer in the heating faces 2a (1a) of the pressure members 1, 2 is made a shape corresponding to the projection shape of the scarf surfaces a2 (a1) for the front and the rear side of the veneers. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an improvement in a method for joining plate members using a separated scarf.

  Conventionally, as veneer veneer (hereinafter simply referred to as veneer), plywood, veneer laminate, solid plate (sawboard), fiberboard, etc. as a processing means, and as a joining means for joining processing using an adhesive In general, the end faces of both plates to be joined are formed on a simple sloped scarf surface, and at least one of the plate scarf surfaces is coated with a thermosetting adhesive or thermoplastic adhesive. Apply an appropriate adhesive such as an agent, then superimpose the scarf surfaces of both plate materials, and apply a rectangular pressure surface sufficient to cover the projected area of the scarf surface on the front and back surfaces of the plate material, and the adhesive Using a pair of pressure members having a heating function or a cooling function adapted to the properties, from the front and back surfaces of the plate material, by heating or cold pressing the superimposed scarf surface, the adhesive is cured, Joining plate materials, so-called Although it is a plain scarf type joining means, as an example of another known means, as disclosed in Patent Document 1, Non-Patent Document 1, etc., instead of the plain scarf type simple adhesive surface, V-shaped, There are so-called separated scarf type joining means in which multiple strips of grooves having an appropriate cross-sectional shape such as a trapezoidal shape are formed in parallel on the scarf surface, and overlapped and joined so that both scarf surfaces are engaged with each other. It is done.

  The separate scarf type joining means has a difficulty in forming a scarf surface (adhesive surface) compared to a general-purpose plain scarf type joining means. There is no hear of the example that was done, but since the adhesive force improves in proportion to the expansion of the bonding area, the concentration of stress on the bending of the bonding plate material is avoided along with the three-dimensional bonding surface, In general, there is an advantage that the strength of the joining plate material is remarkably improved, and since this is one of the effective techniques for forming a strong joining plate material, the present applicant sought to put it into practical use. While it is unavoidable in practice that there is a slight error in the overlay accuracy of the plate material, if the joining form according to the general plain scarf type joining means is adopted, as will be described later, the thickness of the plate material and the scarf surface Overlap If the above conditions satisfy specific requirements, there is no particular concern that problems will occur, but if the above conditions deviate from the specific requirements, there will be a problem of incomplete joining. This has been newly found in the development process of the present invention.

Japanese Utility Model Publication No. 61-175406

Yuzo Hanai "Wood Adhesives and Adhesives" (Morakita Publishing Co., Ltd., 5th Edition), p. 206, Fig. 17.36

  More specifically, for example, as illustrated in FIGS. 12 and 13, a single plate B1 formed by forming a plurality of grooves y2 having a V-shaped cross-sectional shape in parallel on a downward scarf surface b1, and an upward scarf A thermosetting adhesive on at least one of the scarf surfaces b1 and / or b2 with a single plate B2 formed by forming a plurality of grooves y2 having a V-shaped cross-sectional shape in parallel on the surface b2; Apply a suitable adhesive (not shown) such as a thermoplastic adhesive, and then superimpose so that the scarf surfaces of both single plates B1 and B2 are engaged with each other, and a heating function adapted to the properties of the adhesive or Using the pair of upper and lower pressure members 3 and 4 having a cooling function, the above-mentioned scarf surfaces b1 and b2 are heated or cold-pressed from the front and back surfaces of the single plates B1 and B2 to cure the adhesive. Let the single plate B1, B2 When trying to match, the respective pressing surfaces 3a, 4a of the pressing members 3, 4 are in accordance with the pressing members used for general-purpose plain scarf type joining means, and the front and back surfaces of each single plate B1, B2 A rectangular shape sufficient to cover the projected area of the scarf surfaces b1 and b2, ie, the widths W3 and W4 exceeding the width W of each single plate B1 and B2, and the projected length L of the scarf surfaces b1 and b2 Is a rectangular shape having lengths L3 and L4 equal to or greater than, particularly when the conditions such as the thickness of the single plates B1 and B2 and the overlapping state of the scarf surfaces b1 and b2 satisfy specific requirements. There is no risk of problems, but if the above conditions deviate from the specific requirements, the desired hot-pressing action or cold-pressing action cannot be achieved, resulting in incomplete joining. It is.

  That is, for example, as illustrated in FIG. 13, the thickness t1 of the preceding single plate B1 and the thickness t2 of the subsequent single plate B2 in which the adhesive C is applied to the scarf surface b2 are set to the normal value T without error. When the scarf surfaces b1 and b2 of both the single plates B1 and B2 are overlapped at an appropriate position where they are exactly overlapped, or as shown in FIG. The thicknesses t1 and t2 of the plates B1 and B2 are equal to the normal value T without error, and the scarf surfaces b1 and b2 of both the single plates B1 and B2 are overlapped slightly more than appropriate positions. For example, the pressure surfaces 3a and 4a of the pair of upper and lower pressure members 3 and 4 are rectangular, and the lengths L3 and L4 have a normal thickness T. Projection of scarf surfaces b1 and b2 formed on plates B1 and B2 Is even (single projection length to the front and back surfaces of the plate) L equivalent to equivalent or more, it is possible to obtain the heat-pressure acting or cold pressure action as desired, particularly inconvenient for the bonding does not occur.

  Further, for example, as illustrated in FIG. 15, one of the single plates B3 and B4 to be joined, for example, the thickness t4 of the single plate B4 is thicker by the error β1 than the normal value T, but the normal thickness t3. (= T) is overlapped at a position where the tip end side (pointed end side) of the scarf surface b3 of the single plate B3 and the base end side (single plate main body side) of the scarf surface b4 of the single plate B4 exactly overlap. Or, for example, as illustrated in FIG. 16, the thickness t6 of the single plate B5 or B6 to be joined, for example, the single plate B6, is thinner than the normal value T by the error β2, In the case where the tip side of the scarf surface b6 of the single plate B6 and the base end side of the scarf surface b5 of the single plate B5 having a normal thickness t5 (= T) are overlapped with each other, For example, the pressure surfaces 3a of the pair of pressure members 3, 4 The shape of 4a is rectangular, and its lengths L3 and L4 are equal to or equivalent to the projection length L of the scarf surfaces b3 and b5 formed on the single plates B3 and B5 having the normal thickness T. Even if it is above, the desired hot-pressing action or cold-pressing action can be achieved, and there is no significant inconvenience in joining.

  However, as illustrated in FIG. 17, for example, the thicknesses t1 and t2 of both single plates B1 and B2 to be joined are aligned to the normal value T without error, but the scarf surfaces of both single plates B1 and B2 When b1 and b2 are overlapped at a position slightly apart from the appropriate position, or as illustrated in FIG. 18, for example, one of the single plates B3 and B4 to be joined, for example, the single plate B4 The thickness t4 is thicker than the normal value T by an error β1, and the base end side of the scarf surface b4 of the single plate B4 and the scarf surface b3 of the single plate B3 having the normal thickness t3 (= T). Are overlapped at a position apart from the distal end side (in other words, the position where the distal end side of the scarf surface b4 of the single plate B4 and the proximal end side of the scarf surface b3 of the single plate B3 overlap vertically. 19), and further, for example, FIG. As illustrated, one of the single plates B5 and B6 to be joined, for example, the thickness t6 of the single plate B6 is thinner by an error β2 than the normal value T, and the tip of the scarf surface b6 of the single plate B6. When the side and the base end side of the scarf surface b5 of the single plate B5 having a normal thickness t5 (= T) are separated from each other (in other words, the scarf surface b6 of the single plate B6 In the case where the base end side and the tip end side of the scarf surface b5 of the single plate B5 are vertically overlapped), the pressurizing surfaces 3a of the pair of pressurizing members 3, 4 Projection of scarf surfaces b1, b2, b3, and b5 formed on the single plates B1, B2, B3, and B5 having a normal thickness T and the lengths L3 and L4 of which the shape of 4a is rectangular Single plate B1, B2, B4, B5 scarf as long as or equal to length L Pressure is preferentially applied to other parts, and it is difficult to apply necessary and sufficient pressure to the superimposed scarf surfaces b1 and b2, or scarf surfaces b3 and b4, or scarf surfaces b5 and b6. As a result, it is impossible to achieve the hot pressure action or the cold pressure action.

  The present invention has been developed to solve such a problem. Specifically, a plurality of grooves having an appropriate cross-sectional shape such as a V shape and a trapezoidal shape are arranged in parallel on each scarf surface. The plate members formed in a shape are overlapped with each other through an appropriate adhesive such as a thermosetting adhesive or a thermoplastic adhesive so that both scarf surfaces are engaged with each other, and the scarf surface with respect to the front and back surfaces of the plate material Using a pair of pressure members having a pressure surface having a length substantially equal to the projected length of and a width exceeding the width of the plate material, and a heating function or a cooling function adapted to the properties of the adhesive, From the front and back surfaces, a method of joining the plate material by hot-pressing or cold-pressing the superimposed scarf surfaces to join the plate materials, and heating surfaces of at least one of the pair of pressure members For the end of each plate, The shape of the part to be made is a shape that conforms to the projected shape of the scarf surface on the front and back surfaces of each plate material, and a method of joining the plate material with a separated scarf (Claim 1) and the length of the pressure surface of the pressure member The center in the vertical direction is set as a reference position for overlapping the scarf surfaces of the respective plate materials, and the center or substantially the center of the projected length of the scarf surface with respect to the front and back surfaces of each plate material is adjusted to the reference position, The method for joining plate materials by using the separated scarf according to claim 1 and the pair of pressure members, both of the heating surfaces facing the end side of each plate material. The method of joining plate members using a separated scarf according to claim 1 or claim 2, wherein the shape of the part is made to conform to the projected shape of the scarf surface on the front and back surfaces of each plate member (claim 3), The shape of the part facing the end side of each plate member is made to conform to the projected shape of the scarf surface on the front and back surfaces of each plate member only on one of the heating surfaces of the pair of pressure members. A method for joining plate members using the separated scarf according to claim 2 (claim 4) is proposed.

  According to the method for joining plate members according to claim 1 of the present invention, the shape of the portion facing the end side of each plate member is set on the heating surface of at least one of the pair of pressure members. The shape is similar to the projected shape of the scarf surface on the back surface, and the pressure applied by the pressure member is focused on the scarf surface, so conditions such as the thickness of the plate material and the overlapping condition of the scarf surface are specified. If the requirements are met, good bonding can be performed without any particular problems, and even if the above conditions deviate from the specific requirements, the parts other than the scarf surface are preferentially used. There is virtually no pressure applied, which is beneficial because the joining can be performed while avoiding or reducing the occurrence of the problems described above.

  In order to avoid the manifestation / enlarging of the error when joining with the tolerance of the thickness of the plate material and the overlap of the scarf surface, the pressure surface of the pressure member as in the invention according to claim 2 is used. The center in the length direction is determined as a reference position for overlapping the scarf surfaces of the respective plate materials, and the center or substantially the center of the projected length of the scarf surface with respect to the front and back surfaces of each plate material is adjusted to the reference position. It is preferable to adopt a configuration in which the scarf surfaces of the respective plate materials are overlapped.

  Further, in order to cause the pressing force of the pressure member to act more concentrated on the scarf surface of the stacked plate members, the heating surfaces of both pressure members are arranged at the end of each plate member as in the invention according to claim 3. It is preferable that the shape of the part facing the part side is a shape that conforms to the projected shape of the scarf surface with respect to the front and back surfaces of each plate material, but either one of the pair of pressure members as in the invention according to claim 4 For the heating surface only, the plain scarf-type joining means described above can be used even if the shape of the portion facing the end side of each plate material is a shape that conforms to the projected shape of the scarf surface on the front and back surfaces of each plate material Compared with the case of adopting a joint configuration according to the above, the occurrence of the problem as described above is reduced, so that it is correspondingly effective.

It is a partially broken plane explanatory drawing which showed the structure of the joining form which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is process explanatory drawing which showed the process of the joining method of the board | plate material which concerns on this invention. It is side surface explanatory drawing of the means to superimpose the scarf surfaces of a board | plate material. It is a partially broken plane explanatory drawing which showed the structure of the joining form according to a general purpose means. It is process explanatory drawing which showed the process of the joining method of the board | plate material according to a general purpose means. It is process explanatory drawing which showed the process of the joining method of the board | plate material according to a general purpose means. It is process explanatory drawing which showed the process of the joining method of the board | plate material according to a general purpose means. It is process explanatory drawing which showed the process of the joining method of the board | plate material according to a general purpose means. It is process explanatory drawing which showed the process of the joining method of the board | plate material according to a general purpose means. It is process explanatory drawing which showed the process of the joining method of the board | plate material according to a general purpose means. It is process explanatory drawing which showed the process of the joining method of the board | plate material according to a general purpose means.

  Hereinafter, the present invention will be described in more detail together with an example of the embodiment illustrated in the drawings. Means for forming the end portions of both plate members to be joined into a separate scarf shape, and at least one of the plate member scarf surfaces. There are no particular restrictions on the means for applying an appropriate adhesive such as a thermosetting adhesive or a thermoplastic adhesive, and the means for heating or cooling the pressure member. Therefore, for the purpose of avoiding redundant description, only an outline will be added later, and detailed illustration and description will be omitted.

  FIG. 1 is a partially broken plan explanatory view showing the configuration of the joining mode according to the present invention, and FIG. 2 is a process explanatory diagram showing the process of the plate joining method according to the present invention. In the figure, A1 and A2 are single plates to be joined and are not shown in the figure. However, in the preceding molding step, the downward scarf surface a1 of the preceding single plate A1 has a trapezoidal shape. A plurality of grooves y1 having a cross-sectional shape are formed in parallel, and a plurality of grooves y1 having a trapezoidal cross-sectional shape are also formed in parallel on the upward scarf surface a2 of the subsequent single plate A2. In addition, in the preceding application step, an appropriate adhesive (not shown) such as a thermosetting adhesive or a thermoplastic adhesive is applied to at least one of the scarf surfaces a1 and / or a2, respectively. They are sequentially transferred to the positions of a pair of upper and lower pressure members 1, 2 to be described later, and overlapped so that both scarf surfaces a1, a2 are engaged.

  Reference numerals 1 and 2 denote a pair of upper and lower pressure members, which are substantially equal in length L1 and L2 to the projected length L of the scarf surfaces a1 and a2 with respect to the front and back surfaces of the single plates A1 and A2, and the width of the single plate. The pressure surfaces 1a and 2a having widths W1 and W2 exceeding W, and a heating function or a cooling function adapted to the properties of the adhesive, and for each heating surface 1a and 2a, each single plate A1, The shape of the part facing the end side of A2 is formed in a shape similar to the projected shape of the scarf surfaces a1, a2 on the front and back surfaces of each single plate A1, A2, and from the front and back surfaces of the single plates A1, A2. By applying hot pressure or cold pressure to the superimposed scarf surfaces a1 and a2, the adhesive interposed therein is cured.

  The plate material joining method according to the present invention includes, as described above, the shape of the portion facing the end side of each plate material on the heating surface of at least one of the pair of pressure members (both examples are both). In order to form a shape that conforms to the projected shape of the scarf surface on the front and back surfaces of each plate material and to heat or cool the overlapped scarf surface from the front and back surfaces of the plate material, for example, as shown in FIG. The thickness t1 of the plate A1 and the thickness t2 of the subsequent single plate A2 are equal to the normal value T without error, and the scarf surfaces a1 and a2 of both the single plates A1 and A2 are exactly overlapped. In the case where they are overlapped at the position, or as shown in FIG. 3, for example, the thicknesses t1 and t2 of both the single plates A1 and A2 to be joined are aligned to the normal value T without error. Both single plates A1 and A2 have scarf surfaces a1 and a2 In the case where they are overlapped and overlapped a little more than the proper position, even if the heating surfaces 1a and 2a of the pressure members 1 and 2a are opposed to the end portions of the single plates A1 and A2. Even if the shape is formed in a shape similar to the projected shape of the scarf surfaces a1 and a2 with respect to the front and back surfaces of the single plates A1 and A2, the pressing force of the pressure members 1 and 2 is superimposed on the single plates A1 and A2. Since it does not act directly on the parts other than the scarf surfaces a1 and a2 and acts mainly on the scarf surfaces a1 and a2, it is possible to achieve a desired hot-pressure action or cold-pressure action. There is no possibility that the problem of incomplete joining occurs.

  For example, as illustrated in FIG. 4, one of the single plates A3 and A4 to be joined, for example, the thickness t4 of the single plate A4 is thicker than the normal value T by the error β1, but the normal thickness t3. (= T) is overlapped at a position where the tip end side (pointed end side) of the scarf surface a3 of the single plate A3 and the base end side (single plate main body side) of the scarf surface a4 of the single plate A4 exactly overlap. Or, for example, as shown in FIG. 5, the thickness t6 of the single plate A5 or A6 to be joined, for example, the single plate A6, is thinner than the normal value T by the error β2, The case where the front end side of the scarf surface a6 of the single plate A6 and the base end side of the scarf surface a5 of the single plate A5 having a normal thickness t5 (= T) are overlapped with each other are also overlapped. Similarly, the heating surfaces 1a, 2 of the pressure members 1, 2 Even if the shape of the portion facing the end side of each single plate A1, A2 in a is shaped into a shape that conforms to the projected shape of the scarf surfaces a1, a2 on the front and back surfaces of each single plate A1, A2, The pressing force of each pressure member 1 or 2 is applied to a portion other than the scarf surfaces a3 and a4 where the single plates A3 and A4 are overlapped or a portion other than the scarf surfaces a5 and a6 where the single plates A5 and A6 are overlapped. Does not act directly, but acts mainly on the scarf surfaces a3, a4 or scarf surfaces a5, a6, so that the desired hot-pressing action or cold-pressing action can be achieved and bonding is not possible. There is no risk of a complete problem.

  Further, for example, as illustrated in FIG. 6, the thicknesses t1 and t2 of both single plates A1 and A2 to be joined are aligned to the normal value T without error, but the scarves of both single plates A1 and A2 When the surfaces a1 and a2 are overlapped at a position slightly apart from the appropriate position, or as illustrated in FIG. 7, for example, either the single plate A3 or A4 to be joined, for example, the single plate A4 Is thicker by an error β1 than the normal value T, and the base end side of the scarf surface a4 of the single plate A4 and the distal end side of the scarf surface a3 of the single plate A3 having the normal thickness t3 Are overlapped at a distant position (in other words, at the position where the tip end side of the scarf surface a4 of the single plate A4 and the base end side of the scarf surface a3 of the single plate A3 overlap vertically) 8), and for example, as illustrated in FIG. Any one of the single plates A5 or A6 to be joined, for example, the thickness t6 of the single plate A6 is thinner than the normal value T by an error β2, and the tip side of the scarf surface a6 of the single plate A6; When the base end side of the scarf surface a5 of the single plate A5 having the normal thickness t5 is overlapped at a position away (in other words, the base end side of the scarf surface a6 of the single plate A6 and the single plate For the case where the tip end side of the A5 scarf surface a5 overlaps vertically, etc., etc., each single plate A1, A2 (on the heating surfaces 1a, 2a of the pressure members 1, 2 ( Or the shape of the part facing the end side of A3, A4, A5, A6) is the scarf surface a1, a2 (or the front and back surfaces of each single plate A1, A2 (or A3, A4, A5, A6) Is formed into a shape similar to the projected shape of a3, a4, a5, a6) The heating surface 1a or / and 2a on at least one of the heating surfaces 1a and 2a sinks into the veneer to a deeper depth than the state of FIGS. Since pressure is applied preferentially to the surfaces a1, a2 (or a3, a4, a5, a6), there is virtually no preferential application of pressure to portions other than the scarf surface, as desired. The hot pressure action or the cold pressure action can be achieved, and there is no possibility that the problem of incomplete joining occurs.

  2 to 8, the heating surfaces of both the pressure members conform to the projected shape of the scarf surface on the front and back surfaces of each plate material in the shape of the portion facing the end portion side of each plate material. If the shape is adopted, the pressing force of the pressurizing member acts more concentrated on the scarf surface, which is very effective and preferable. However, as is apparent from the examples of FIGS. 13 to 16, as shown in FIGS. As in the example of FIG. 5, when the conditions such as the thickness of the plate material and the overlapping condition of the scarf surface satisfy specific requirements, the illustration is omitted, but the heating surface of the pressure member on one side is temporarily Even in the rectangular shape, there is no particular problem, and for example, as illustrated in FIG. 9, the thickness t4 of the single plate A4 is thicker than the normal value T by the error β1, but it is normal. A base end side of a scarf surface a3 of a single plate A3 having a thickness t3 (= T), and the single plate In the case where the four scarf surfaces a4 are overlapped with each other at the tip end side, the pressurizing surface 20a of the lower pressurizing member 20 mainly contacting the single plate A4 side has a normal thickness. Even if it is a rectangular shape having a length L20 that is equal to or greater than or equal to the projected length L of the scarf surface a3 of the single plate A3 having a length t3 (= T), the emphasis is placed on the scarf surfaces a3 and a4 without any particular trouble. Thus, it is possible to exert a desired hot pressure action or a cold pressure action as desired, or, for example, as illustrated in FIG. 10, the thickness t6 of the single plate A6 is a normal value T. The base end side of the scarf surface a6 of the single plate A6 and the distal end side of the scarf surface a5 of the single plate A5 having a normal thickness t5 (= T) overlap vertically, although the error β2 is thinner than For the case where they are superimposed in position, The pressure surface 10a of the upper pressure member 10 in contact with the single plate A5 side is equal to or more than the projection length L of the scarf surface a5 of the single plate A5 having a normal thickness t5 (= T). Even if it is a rectangular shape having the length L10, it is possible to exert a pressing force mainly on the scarf surfaces a5 and a6 to achieve a desired hot-pressure action or cold-pressure action. Is effective accordingly.

  Thus, when the shape of the portion facing the end side of each plate material on the heating surface of the desired pressure member is made to conform to the projected shape of the scarf surface on the front and back surfaces of each plate material, The copying accuracy (similarity) does not necessarily have to be an accuracy that perfectly matches, and a slight difference in shape is allowed practically. A shape that does not protrude from the end of the plate material and an error are preferable. On the other hand, there is no particular limitation on the shape of the part facing the side opposite to the end of each plate on the heating surface of the desired pressure member (the end of the plate on the back side). Any shape that can exert a reaction (reaction force) against the applied pressure of the pressure member located on the side is sufficient, but from the viewpoint of ease of processing, etc., a flat shape with no irregularities as shown in the above example is appropriate. is there.

  Further, in the above-described example, only one of the pair of pressure members (in the example, the lower side) can be moved up and down, and the pressure member is pressed against the plate material to overlap the scarf surface. However, the present invention is not limited to a mode in which only one of the pressurizing members is moved to pressurize the joint portion. There is no problem even if the design of both of the pressing members is changed to a form in which the pressing members are pressed against the plate material in a synchronized manner.

  In addition, in order to make the error invisible and non-expandable when allowing the tolerance of the thickness of the plate material and the overlap of the scarf surface in this way, in the length direction of the pressure surface of the pressure member, The center is defined as a reference position where the scarf surfaces of the respective plate materials are overlapped, and the center or substantially the center of the projected length of the scarf surface with respect to the front and back surfaces of each plate material is adjusted to the reference position while the scarf surface of each plate material is adjusted. It is preferable to adopt a configuration of overlapping, and when joining each plate material while intermittently transferring in the same direction as the extending direction of the groove formed on the scarf surface, for example, by adopting a transfer form as described below, Desired alignment can be easily performed.

  That is, for example, as illustrated in FIG. 11, the reference position set at the center of the pressing surface 1a of the pressing member 1 from the protruding end (tip) of the rear end side scarf surface a1 of the preceding single plate A1 at the arbitrary fixed position M. The leading single plate A1 is transported and stopped by a distance obtained by subtracting the correction value = L / 2 from the distance S to N, and the front end side scarf surface of the subsequent single plate A2 at the arbitrary fixed position M is stopped. According to the transfer mode in which the subsequent single plate A2 is transferred and stopped by a distance obtained by adding a correction value = L / 2 to the distance S from the protruding end (tip) of a2 to the reference position N, Even if a slight error may occur in the transfer distance of the single plates A1 and A2 having the normal thickness T, the centers of the scarf surfaces a1 and a2 of the single plates A1 and A2 are approximately aligned with the reference position. Although not shown in the figure, for normal thickness In the case of a single plate having a slight plus or minus thickness error, the single plate is transferred and stopped by a distance obtained by subtracting or adding the same correction value according to the example of FIG. Therefore, even if a slight error may occur in the transfer distance of each single plate, the approximate center of the scarf surface of each single plate can be adjusted to the reference position. In FIG. 11, reference numeral 5 denotes a single plate detector composed of a line sensor camera or the like, and a protruding end of the rear end side scarf surface a1 of the preceding single plate A1 and a front end side scarf surface a2 of the subsequent single plate A2. Each time the protruding end of the plate passes the arbitrary fixed position M, a single plate detection signal is transmitted to a control mechanism (not shown) that controls the operation of a single plate conveyance mechanism (not shown).

  Incidentally, if the scarf angle of the scarf surface a1 (a2) of the single plate A1 (A2) having a normal thickness T is θ and the projected height of the groove y1 with respect to the front and back surfaces of the single plates A1 and A2 is h, Since the projection length L of the scarf surface a1 (a2) can be obtained by Formula 1... L = T ÷ tan θ + h, the specific value Q of the correction value is Formula 2... Q = (T ÷ tan θ + h) / 2. Can be sought.

  Further, if necessary, if the thickness of each single plate is measured in advance and an accurate value of the error is confirmed, the single plate having the thickness error can also be expressed by Equation 3... La = (T + β1) ÷ tan θ + h , Or Formula 4 ... Lb = (T- [beta] 2) / tan [theta] + h, the projection length of each scarf surface can be obtained, Formula 5 ... Qa = La / 2, or Formula 6 ... Qb = Lb / 2 is used to obtain each correction value, and to subtract or add the correction value Qa (or correction value Qb) to the distance S from the above-mentioned arbitrary fixed position M to the reference position N If a form is taken, it is also possible to match the center of the scarf surface of a single plate having a thickness error more accurately with the reference position.

  Furthermore, although not shown in the figure, a molding process provided with means for forming the scarf surface into a separated scarf shape is provided before the joining process, and from the molding process to the joining process directly. In the case of adopting a transfer form in which a single plate is transferred, the separation distance between the two strokes is known in advance, so that the separation distance between the two strokes can be obtained without correcting the transfer distance using the mathematical formula as described above. If each single plate is transported intermittently by an appropriate distance corresponding to the above, desired alignment can be easily performed.

  However, as a method for joining plate members according to the present invention, the joining form is not limited to the joining form by positioning as described above. For example, the front end portion or the rear end portion of the pressing surface of the pressing member is the reference position. As a matter of course, a joining form in which the end portions (protruding end and base end) of the scarf surface of each plate material are aligned with the reference position can be used.

  Of course, as illustrated in the above example, the subsequent plate material transfer direction is not limited to the same direction as the length direction of the scarf surface, and is not illustrated. Subsequent plates are transported in a width direction from diagonally below (or above) in the width direction to below (or above) the preceding plate, and then moved upward (or below), or for example, width There is no problem even if the two scarf surfaces are overlapped so that they are moved directly from diagonally downward (or upward) in the direction to diagonally upward (or downward).

  In addition, in the example illustrated in FIGS. 1 to 11, a configuration in which a plurality of grooves having a trapezoidal cross-sectional shape is formed on the scarf surface is adopted, but the cross-sectional shape of the groove is not limited to the trapezoidal shape. For example, the design may be changed to other appropriate shapes such as a wave shape (regular curve shape) and a concave shape (U shape) including a V shape as illustrated in FIG. Moreover, there is no special restriction | limiting also about the thickness of each board | plate material, the angle of the scarf surface formed in each board | plate material, etc. Furthermore, there is no special restriction | limiting also about the kind of adhesive agent.

  Thus, as a means for forming the scarf surface into a separated scarf shape, for example, a means for forming a blade edge of a known cutter into a desired groove shape and cutting the end of each plate material obliquely, As a means for applying the adhesive to the scarf surface, a known dripping or spraying type adhesive supply device is provided so as to be able to run in a zigzag or linear manner in the width direction of each plate material, and the adhesive is applied to the scarf surface. In addition to the means for dripping or spraying in a zigzag or linear manner, a transfer body having a transfer portion having a cross-sectional shape corresponding to the cross-sectional shape of the groove is provided so as to be able to run in a direction parallel to the scarf surface of each plate The means for transferring the adhesive applied to the transfer portion of the transfer body onto the scarf surface, etc., can be mentioned, but in short, there are no particular restrictions on the configuration, and any means capable of performing the required function is sufficient. Heat or cool the pressure member For a means, for example, an electric heater type, heating oil circulation, the cooling water circulation, etc., no problem using a known heating means or cooling means.

  As is apparent from the above, the present invention has been conventionally used as an example of a joining means, but has not yet been put into full-scale practical use. This is an epoch-making improvement technique that opens the way to the field, and the effect of the present invention in this field is remarkable.

A1, A2, A3, A4, A5, A6: Single plate a1, a2, a3, a4, a5, a6: Scarf surface B1, B2, B3, B4, B5, B6: Single plate b1, b2, b3, b4, b5, b6: Scarf surface h: Projection height L of the groove with respect to the front and back surfaces of the single plate L: Projection length L1, L2 of the scarf surface with respect to the front and back surfaces of the single plate: Length of the pressure surface of the pressure member used in the present invention L3, L4: Length of the pressure surface of the pressure member used for general-purpose means M: Arbitrary fixed position N: Reference position Q, Qa, Qb: Correction value T: Normal value t1, t2, t3 of the thickness of a single plate t4, t5, t6: Single plate thickness W: Single plate width W1, W2, W3, W4: Pressure member width y1, y2: Multiple grooves formed on the scarf surface β1, β2: Single plate Thickness error θ: Scarf surface angle 1, 2: Pressurizing members 1a, 2a used in the present invention: For use in the present invention That the pressure member pressing surfaces 3, 4: pressure member 3a forms pursuant to the general purpose unit, 4a: pressing surface of the pressure member in the form equivalent to the general purpose unit 5: veneer detectors

Claims (4)

  Appropriate bonding, such as thermosetting adhesives and thermoplastic adhesives, to each scarf surface by forming multiple strips of grooves having appropriate cross-sectional shapes such as V-shaped and trapezoidal shapes in parallel A pressure surface having a length substantially equal to the projected length of the scarf surface with respect to the front and back surfaces of the plate material and a width exceeding the width of the plate material, and the adhesive. Using a pair of pressure members having a heating function or a cooling function adapted to the properties of the sheet, the adhesive is cured by hot or cold pressing the superimposed scarf surface from the front and back surfaces of the plate material. A joining method for joining plate members, wherein at least one heating surface of the pair of pressure members has a shape of a portion facing the end side of each plate member, and a scarf surface with respect to the front and back surfaces of each plate member According to the projected shape Plate bonding method according to cell Palais Ted scarf, characterized in that the Jo.   The center in the length direction of the pressure surface of the pressure member is set as a reference position where the scarf surfaces of the respective plate materials are overlapped, and the center or substantially the center of the projected length of the scarf surface on the front and back surfaces of each plate material, The method for joining plate members using a separated scarf according to claim 1, wherein the scarf surfaces of the respective plate members are overlapped with each other while being matched to the reference position.   Both of the pair of pressurizing members are configured such that the shape of the portion of the heating surface facing the end side of each plate material conforms to the projected shape of the scarf surface on the front and back surfaces of each plate material. The board | plate material joining method by the separated scarf of description.   The shape of the part facing the end side of each plate member is made to conform to the projected shape of the scarf surface on the front and back surfaces of each plate member only for one of the heating surfaces of the pair of pressure members. The joining method of the board | plate material by the separated scarf of Claim 2.

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