JP2013103170A - Method for supplying adhesive to spreader and supply mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make equal supply of the amount of coating of an adhesive to the full width of a board, and thereby save the consumption of the adhesive.SOLUTION: A spreader includes the following components. That is, a coating mechanism A includes a coating roll 1, a regulating roll 2, a pair of right/left damming plates 3, with an adhesive storage part being arranged in an upper side space formed by the mutually opposed rolls 1 and 2. This coating mechanism A is located above or below the passage for a board 9, and the effective coating width of the coating roll 1, is set to be considerably larger than the maximum width W of the board 9. Thus, a stand-by area T of an appropriate size can be arranged to the right and the left of the board 9 when the board 9 passes through the regular use area U of the coating roll 1 as positioned rightly. In addition, the spreader is provided with at least two pieces of supply pipe 7 which feed the adhesive 5 to the adhesive storage part, above the storage part. Besides, each terminal 7b of two supply pipes 7 is made to face the area above the right and the left stand-by area (t) of the adhesive storage part corresponding to the right and the left stand-by area T of the coating roll 1 respectively. The adhesive 5 is supplied to the right and the left stand-by area (t) of the adhesive storage part through the two supply pipes 7.

Description

  The present invention relates to a method and a supply mechanism for supplying an adhesive to a spreader.

  Conventionally, as an application apparatus for applying an adhesive such as a thermosetting adhesive or a room temperature curable adhesive to a plate material such as a veneer veneer or a plywood, for example, FIG. 4 (a), (b), (c) As shown schematically, if necessary, an elastic body such as rubber is coated on a cylindrical outer peripheral portion, and an appropriate number of narrow grooves for storing an adhesive having an appropriate cross-sectional shape are provided on the elastic body. A pair of weirs in close contact with the right and left side portions of each of the rolls 1 and 2, respectively. The coating mechanism A, which has at least a plate 3 and is provided with an adhesive storage portion in the opposing space above the rolls 1 and 2, is disposed above and / or below the passage of the plate 9. (If necessary, the spreader 4 is provided opposite to the coating roll 1). And, supplying the adhesive to the reservoir is accomplished through the supply pipe of the adhesive which is disposed above the container portion (see Patent Document 1).

  More specifically, the supply mains spreader-side connecting portion for supplying the adhesive to the spreader from an adhesive supply source comprising an adhesive mixing device, an adhesive temporary storage tank, etc. (when there are a plurality of spreaders) Are connected to the starting end (inlet end) of the adhesive supply pipe, and if necessary, manually or automatically at the appropriate position of the supply main pipe or the supply pipe. In addition, an open / close valve that can be freely opened and closed is provided, and a terminal (outlet end) of the supply pipe is provided so as to face only one place above the center of the reservoir, and the open / close valve is intermittently provided as necessary. The supply mode is such that the opening / closing or the opening / closing valve is appropriately throttled, and an appropriate amount of adhesive is supplied to the storage unit in an appropriate amount, and the adhesive is normally supplied to the center of the storage unit. Met.

  On the other hand, the relative relationship between the effective application width of the spreader (coating roll) and the maximum width of the plate material will be described. For example, due to the difference in drying shrinkage, like a dry veneer veneer with a different plate width for each sheet, For plate materials with non-uniform plate width, or for example, plywood that is skewed with respect to the conveying direction due to differences in air resistance due to warping, etc. In order to apply the adhesive without hindrance, the effective application width of the application roll is set to be considerably wider than the maximum width of the plate material, and the regular area of the application roll (left-right or right-and-left substantially equal distribution location) )) In a proper posture (parallel or substantially parallel to the traveling direction), it is also a conventional practice to provide spare areas of appropriate dimensions on the left and right of the plate material. Even in the storage area of the agent, The left and right normal use range of the reservoir that, so that the spare area of the reservoir corresponding to the reserve section of the coating roll is formed.

JP-A-10-244191

  Thus, the adhesive in the reserve area in the adhesive reservoir has a very low probability of being applied to the plate material compared to the adhesive in the regular area of the reservoir. Therefore, it is inevitable that the viscosity gradually increases with the passage of time, and the amount of adhesive stored in the regular area of the storage portion is reduced by the plate material. When it gradually decreases with application to the storage area, the adhesive in the reserve area of the storage section will be mixed into both ends of the storage area of the storage section little by little. The viscosity of the existing adhesive will be different at the center and both ends of the regular area, and as a result, the amount of adhesive applied to the plate will be different at the center and both ends in the width direction of the plate And, as a result, it causes inconveniences such as waste of adhesive and uneven curing of local adhesive. (As the viscosity of the adhesive increases, the amount of adhesive applied increases, so in general, the adhesive tends to be applied excessively near both ends in the width direction of the plate, and the curing of the excessive adhesive is delayed. It became clear during the development process of the present invention.

  On the other hand, as described above, according to the conventional supply method in which the adhesive is supplied exclusively to the center of the storage area, the adhesive newly supplied to the center of the storage area is used in the storage area. The adhesive whose viscosity has already increased in comparison with the central part in the vicinity of both ends of the area is pushed back to the reserve area of the reservoir again, and the viscosity of the adhesive staying in the reserve area of the reservoir is reduced. Since it serves to promote the increase, this results in a vicious circle that further increases the occurrence of the above-mentioned defects and harmful effects.

  In addition, even if the actual supply position is within the regular area of the reservoir, even if a configuration in which a plurality of adhesive supply pipes are provided and the adhesive can be supplied to a plurality of locations, The newly supplied adhesive pushes the relatively high-viscosity adhesive in the vicinity of both ends of the normal area of the storage area back to the reserve area of the storage area again, increasing the viscosity of the adhesive in the reserve area It is still effective to prevent the above-mentioned problems and harmful effects. Also, if a configuration is adopted in which the adhesive is supplied to only one spare area of the adhesive reservoir through a single supply pipe, the adhesive in the opposite spare area is used. Since the increase in the viscosity of the agent is further promoted, the occurrence of the above problems and harmful effects cannot be fundamentally solved.

  The present invention has been developed to improve the defects of such a conventional supply method, and specifically, as described above, on the left and right of the regular area of the reservoir corresponding to the regular area of the coating roll, In the spreader formed by forming a reserve area of the storage section corresponding to the reserve area of the coating roll, at least the storage section is provided with an adhesive supply path for supplying an adhesive from the adhesive supply source to the upper side of the storage section. The two ends of the adhesive supply path of the two strips are provided above the reserve area of the storage section, respectively, and the left and right sides of the storage section are connected via the two adhesive supply paths. A method of supplying an adhesive to a spreader (Claim 1), characterized in that the adhesive is supplied to a reserve area, and as described above, on the left and right of the regular area of the reservoir corresponding to the regular area of the coating roll, Form a reserve area of the reservoir corresponding to the reserve area of the coating roll In the spreader, at least two supply members that form an adhesive supply path for supplying an adhesive from an adhesive supply source to the upper part of the storage part are provided at least above the storage part. Each end of the two supply members faces above the reserve area of the storage section corresponding to the left and right reserve areas of the coating roll, respectively, to the left and right reserve areas of the storage section via the two supply members A spreader for supplying an adhesive to the spreader (Claim 2), and an end of one supply member for supplying the adhesive from the adhesive supply source to the upper side of the spreader. 3. A mechanism for supplying an adhesive to a spreader according to claim 2, wherein the first supply member is bifurcated at the end of the one supply member. 3) and in the adhesive reservoir from the adhesive source 3. A mechanism for supplying adhesive to the spreader according to claim 2, comprising two supply members each supplying adhesive directly to the upper part of the left and right spare areas, and two supplies The adhesive to the spreader according to claim 2, 3 or 4, wherein each end of the member is faced as far as possible to the outside of the left and right spare areas in the adhesive reservoir. And a supply mechanism (claim 5).

  According to the adhesive supply method of the present invention, the adhesive newly supplied to the left and right spare areas in the adhesive reservoir via the two adhesive supply paths is the spare area of the reservoir. In addition to the action of reducing the viscosity of the staying adhesive so as to approach the original proper viscosity, it stays in the reserve area of the reservoir. Since the adhesive is also pushed out toward the normal area of the storage part, the adhesive itself in the preliminary area of the storage part is greatly reduced, resulting in the retention. The increase in viscosity is greatly reduced, and as a result, the difference in viscosity of the adhesive is not likely to occur between the regular area and the reserve area of the reservoir. The amount is different from the center in the width direction of the plate material and both ends, and induces harmful effects such as waste of adhesive. Recessed also will be greatly improved. Therefore, in the implementation of such a supply method, the adhesive supply mechanism described in claims 2 to 5 can be applied, which is beneficial in accordance with each configuration.

It is front explanatory drawing of the spreader provided with the supply mechanism of the adhesive agent concerning this invention. It is side surface explanatory drawing of the spreader provided with the supply mechanism of the adhesive agent which concerns on this invention. FIG. 2 is a cross-sectional explanatory view taken along line YY in FIG. 1. It is a schematic side view schematically showing the form of an existing spreader.

  Hereinafter, the present invention will be described in further detail together with an example of the embodiment illustrated in the drawings, and various conventionally known forms are adopted as necessary for the adhesive reservoir narrow groove formed on the outer peripheral surface of the coating roll. There is no problem, as well as a drive source for driving each roll of the spreader, and an adhesive remaining amount detector provided for detecting the remaining amount of adhesive remaining in the storage portion, if necessary. It is not necessary to use a special type, and further, control the operation of each drive source, or based on the detection signal of the adhesive remaining amount detector, the manual signal, etc. The control mechanism that automatically controls the opening and closing does not need to have a special control function, and it is sufficient to have a control function of a general technical level. (Including control circuit) It was omitted.

  FIG. 1 is a front view of a spreader provided with an adhesive supply mechanism according to the present invention, and FIG. 2 is a side view of the spreader provided with an adhesive supply mechanism according to the present invention. FIG. 3 is a cross-sectional explanatory view taken along line YY in FIG. 1. In the figure, reference numeral 1 denotes an application roll in which strip-like narrow grooves (not shown) having an appropriate cross-sectional shape are formed on the peripheral surface of an elastic body 1a made of rubber or the like coated on the outer periphery. In order to constitute the spreader application mechanism A, a drive source (not shown) is composed of an electric motor or the like that is pivotally attached to a machine frame (not shown) via a bearing (not shown) and the like, and whose drive is controlled by a control mechanism (not shown). ) At a predetermined peripheral speed, and an adhesive reservoir is formed on the upper side of the peripheral surface facing the regulating roll 2 described later, and a feed roll 4 described later In cooperation, each time the single plate 9 is transferred in the direction of the arrow shown in the figure, an appropriate amount of adhesive 5 is applied to the upper surface of the single plate 9.

  Reference numeral 2 denotes a regulating roll having a smooth peripheral surface, and a displacement member (not shown) consisting of a screw with a handle is obtained in order to form a spreader coating mechanism A. In order to be able to be precisely displaced, it is locked to a machine frame (not shown) through a bearing (not shown) so as to be able to move back and forth, and an adhesive is stored on the upper side of the peripheral surface facing the coating roll 1. And a solid line at a peripheral speed somewhat slower than the peripheral speed of the coating roll 1 as usual through a drive source (not shown) comprising an electric motor or the like whose drive is controlled by a control mechanism (not shown). The amount of the adhesive 5 applied to the upper surface of the single plate 9 via the application roll 1 is regulated so as to be an appropriate amount.

  Reference numeral 3 denotes a pair of left and right weir plates disposed on both sides of the coating roll 1 and the regulating roll 2, which are elastic members (not shown) made of ridges or the like to form a spreader coating mechanism A. A desired amount is obtained in the adhesive reservoir formed on the upper side of the opposed circumferential surfaces of the rolls 1 and 2 by obtaining a resilient action and being lightly pressed against both side surfaces of the rolls 1 and 2. The adhesive 5 is dammed up so that it can be stored.

  Thus, the effective application width L of the application roll 1 is considerably wider than the maximum width W of the plate material 9 and is a regular area U (equal to the left and right) of the application roll 1 having the same dimensions as the maximum width W of the plate material 9. Or the right and left sides of the plate 9 when passing in a proper posture (parallel to or substantially parallel to the traveling direction) through the right and left sides of the plate material 9 are provided with appropriately sized spare areas T. Even if there is a slight error in the maximum width W of the plate material 9 or the transport posture of the plate material 9 is slightly deviated, the adhesive 5 can be applied to the plate material 9 without any problem. . Accordingly, the reserve area t of the storage section corresponding to the reserve area T of the application roll 1 is formed on the left and right sides of the normal area u of the storage section corresponding to the normal area U of the application roll 1 as well. It will be.

  4 is a feed roll disposed below the coating roll 1 in order to form a spreader in combination with the coating mechanism A having the above members (not shown, but if necessary, The outer peripheral portion is covered with an elastic body made of rubber or the like, and the lifting and lowering member (not shown) made of a screw with a handle is obtained so as to adapt to the change of the thickness of the single plate 9 to be processed, A drive source (for example, an electric motor or the like, which is engaged with a machine frame (not shown) via a bearing (not shown) so as to be able to move up and down precisely, and whose drive is controlled by a control mechanism (not shown). (Not shown) is rotated in the direction indicated by the arrow at a peripheral speed equivalent to the peripheral speed of the coating roll 1, and in cooperation with the coating roll 1, the single plate 9 is transferred in the direction indicated by the arrow.

  Reference numeral 6 denotes a single supply main that forms an adhesive supply path, the start of which is connected to an adhesive supply source (not shown) including an adhesive mixing device, an adhesive temporary storage tank, and the like. In addition, an open / close valve 8 that can be opened and closed manually or automatically is interposed in the vicinity of the end 6b facing the upper center of the spreader having the above-described members, from the adhesive supply source to the upper center of the spreader. Adhesive 5 is supplied. If necessary, the supply amount of the adhesive 5 can be adjusted by opening and closing the on-off valve 8 intermittently or by appropriately restricting it.

  Reference numeral 7 denotes two supply pipes that form a supply path for the adhesive 5, and a start end 7 a of each supply pipe 7 is connected to the end 6 b of the supply main pipe 6 in a bifurcated manner. 7 is disposed so as to face the reserve area t in the adhesive reservoir, and the supply source of the adhesive (via the supply main pipe 6 and the on-off valve 8). The adhesive 5 supplied from (not shown) is supplied to the reserve area t of the adhesive reservoir.

  The adhesive supply method according to the present invention can be implemented using, for example, the supply mechanism configured as described above, and the adhesive storage portion is repeatedly applied with the application of the adhesive 5 to the plate material 9. When the storage amount of the adhesive 5 is reduced below a certain limit, the operator opens the on-off valve 8 only for a desired period by a manual operation, or a manual signal by the operator's operation, or By automatically opening the on-off valve 8 for an appropriate period based on the detection signal of the adhesive remaining amount detector provided as necessary, the adhesive 5 is passed through the two supply pipes 7a. When supplied to the reserve area t of the storage section, the newly supplied adhesive 5 is mixed with the adhesive 5 staying in the reserve area t, and the adhesive staying in the reserve area t. The action of reducing the viscosity of the agent 5 so as to approach the original appropriate viscosity In addition, as shown by an arrow in FIG. 3, the adhesive 5 that stays in the reserve area t is also pushed out toward the normal area u of the storage section. The retention of the adhesive 5 itself at t is greatly reduced, and the increase in the viscosity due to the retention is greatly reduced. As a result, the normal area u and the reserve area t of the storage section are reduced. In the meantime, since the difference in viscosity of the adhesive 5 as in the past is less likely to occur, the amount of application of the adhesive 5 to the plate material 9 is different between the center portion and both end portions in the width direction of the plate material 9, Defects that induce adverse effects such as waste of the adhesive 5 are also greatly improved.

  Incidentally, as a specific form of the supply member forming the adhesive supply path, as illustrated in the above-described embodiment, a single supply member for supplying the adhesive from the adhesive supply source to above the spreader; Although the form by the combination with two supply members that distribute and supply the adhesive supplied by the one supply member to each spare area of the adhesive reservoir is suitable for simplification of the overall configuration, Although it is not necessarily limited to such a form, illustration is omitted, but two pipes each supply adhesive directly from the adhesive supply source to above the left and right spare areas in the adhesive reservoir. It is possible to adjust the supply amount separately if necessary by providing an opening / closing valve at an appropriate position of the two supply members as needed.

  In any case, as illustrated in the above-described embodiment, the ends of the two supply members forming the two adhesive supply paths are connected to the left and right spare areas in the adhesive reservoir as much as possible. If it is made to face above the outer side, the push-out action to the regular area of the reservoir for the adhesive staying in the reserve area of the reservoir will be more effectively promoted, so it will be more effective. Is.

  Further, as exemplified in the above embodiment, when a tubular supply member is used as the adhesive supply member, the adhesive supply source is provided at a position higher than the height of the spreader, and the weight of the adhesive is used. In addition to the supply mode for supplying the adhesive to the spreader reservoir, if necessary, the adhesive supply source is provided at a height equal to or less than the height of the spreader, and forced supply using a supply pump or the like. However, the shape of the supply member is not limited to the tubular shape, but at least above the reserve area of the storage section. The two supply members facing the ends may be replaced with other shape supply members, for example, a bowl-shaped supply member, if necessary.

  As is apparent from the above, according to the present invention, it is possible to achieve the equalization of the application amount of the adhesive with respect to the entire width of the plate material, the saving of the consumption of the adhesive, etc. The effect of implementing the present invention in the above is remarkable.

A: Spreader application mechanism U: Application roll regular area u: Adhesive storage area normal area T: Application roll reserve area t: Adhesive storage area W: Maximum width of plate material 1: Application roll 2: Regulation roll 3: Dam plate 4: Feed roll 5: Adhesive 6: Supply main pipe 7: Supply pipe 8: On-off valve 9: Plate material

Claims (5)

  An applicator roll for applying the adhesive adhering to the outer peripheral surface to the plate material, a regulating roll for regulating the adhering amount of the adhesive on the outer peripheral surface of the applicator roll, and right and left in close contact with both sides of each roll A coating mechanism having at least a pair of weir plates and having an adhesive storage portion provided in an opposing interval on the upper side of each of the rolls, and disposed on at least one of the upper and lower sides of the plate material passage. In addition, by setting the effective application width of the application roll to be considerably wider than the maximum width of the plate material, a spare area of an appropriate size is provided on the left and right sides of the plate material when passing through the normal area of the application roll in an appropriate posture. In the spreader, the adhesive supply path for supplying the adhesive from the adhesive supply source to the upper portion of the storage portion is provided at least above the storage portion, and the two strips are bonded. At each end of the agent supply path, The adhesive roll is supplied to the left and right spare areas of the storage section through two adhesive supply paths, respectively, facing the upper area of the storage section corresponding to the left and right spare areas of the coating roll. To supply adhesive to the spreader.   An applicator roll for applying the adhesive adhering to the outer peripheral surface to the plate material, a regulating roll for regulating the adhering amount of the adhesive on the outer peripheral surface of the applicator roll, and right and left in close contact with both sides of each roll A coating mechanism having at least a pair of weir plates and having an adhesive storage portion provided in an opposing interval on the upper side of each of the rolls, and disposed on at least one of the upper and lower sides of the plate material passage. In addition, by setting the effective application width of the application roll to be considerably wider than the maximum width of the plate material, a spare area of an appropriate size is provided on the left and right sides of the plate material when passing through the normal area of the application roll in an appropriate posture. The spreader is provided with at least two supply members that form an adhesive supply path for supplying an adhesive from an adhesive supply source to the upper part of the storage part, at least above the storage part. Both of the two supply sections Each end of each of the coating rolls faces above the reserve area of the reservoir corresponding to the left and right reserve areas of the coating roll, and the adhesive is supplied to the left and right reserve areas of the reservoir via two supply members. A mechanism for supplying an adhesive to a spreader.   The end of one supply member that supplies adhesive from the adhesive supply source to the upper side of the spreader is made to face the upper center of the spreader, and at the end of the one supply member, the start ends of the two supply members 3. A mechanism for supplying an adhesive to a spreader according to claim 2, wherein the adhesive is engaged in a bifurcated shape.   3. The adhesive to the spreader according to claim 2, comprising two supply members each for supplying adhesive directly from an adhesive supply source to above the left and right spare areas in the adhesive reservoir. Supply mechanism.   The spreader according to claim 2, 3 or 4, wherein each end of the two supply members faces the upper side of the left and right spare areas in the adhesive reservoir as far as possible. Adhesive supply mechanism.

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