JP5159553B2 - Discriminated conveying method and discriminating conveying apparatus for fixed sheets - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of discriminating and conveying a regular sheet and a discriminating and conveying apparatus. The present invention relates to a discrimination conveyance method and a discrimination conveyance device for fixed sheets that can be stably conveyed to a road.

  Conventionally, in the process of conveying a plurality of sheets of a regular shape such as a rectangular veneer veneer to the next process, for example, separation of each sheet for each quality and usage, or securing a deposition processing time, etc. There is a demand to selectively convey individual sheets to the upper and lower two-stage conveyance paths according to necessity.

Thus, for example, in Patent Document 1, an opening / closing body that receives a single plate from the transfer conveyor and opens downward is provided behind the end of the transfer conveyer that supports and transfers the single plate from below. An adsorption conveyor with an adsorption device that adsorbs and conveys the veneer from above is arranged near the end, and the adsorption device is activated each time one veneer jumps and is conveyed via the conveyance conveyor. A means for selectively discriminating and conveying the coming veneer alternately to the opening / closing body side and the suction conveyor side for each sheet, or in Patent Document 2, for example, a conveyance line for carrying and conveying a veneer from below is provided. A branch station is provided in the middle, a branch line with a suction device is provided at the upper part of the branch station, and a direction changing means for guiding the tip of the thin plate to the branch line side is provided at the branch station. The A means for selectively discriminating and conveying the leading end portion of a desired thin plate among the thin plates to be sent to the branch line side via the direction changing means is disclosed. 3 is provided with a discrimination mechanism similar to the discrimination mechanism used in the means of the above-mentioned documents in two stages with respect to the conveying direction of the cutting plate, the discrimination is carried out twice, and the cutting plate is divided into three types for convenience. Means for carrying out the discrimination is disclosed.
Japanese Patent Laid-Open No. 60-249597 JP 2002-52367 A Japanese Utility Model Publication No. 58-56738

  Thus, the sheet to be processed has a strength in the conveying direction such as a thick veneer veneer (hereinafter simply referred to as a veneer) having no cracks, paper having no break, a rubber plate, or a metal plate. Can be conveyed without discrimination using any of the above-mentioned known means, but the sheets to be processed are extremely weak in the conveying direction. In the case of sheets, according to each of the above-mentioned known means, there is a problem that the discriminating and conveying cannot be performed stably as described below due to the configuration of the discriminating mechanism used.

  That is, when the lower conveyance mechanism that forms the lower conveyance path and the upper conveyance mechanism that forms the upper conveyance path are vertically opposed to each other, such as the discrimination mechanism used for each known means, even if there is a warp or an irregularity. Even in the case of flat sheets, in order to pass through between the respective conveying mechanisms without any trouble, as is clear from the description of the drawings of the above publications, between the upper and lower conveying mechanisms, It is necessary to provide a gap that is several times to several tens of times larger than the thickness of the sheets.

  However, each of the known means adopts a configuration in which the sheets are gradually sucked and raised from the lower conveyance path side to the upper conveyance path side from the front end portion to the rear end portion, and is exemplified in FIG. 3 of Patent Document 3, for example. As described above, in a wide space provided between the upper and lower transport mechanisms, a state in which the portion that has already been suctioned and lifted is suspended and the portion that has been lifted is repeatedly expressed in the middle portion of each sheet. Therefore, for example, when a very thin veneer is conveyed in a direction orthogonal to the fiber direction, or a thick veneer that is already cracked is conveyed in a direction orthogonal to the fiber direction, the sheets to be processed are In the case where the sheet is very weak in the conveying direction, a new crack is generated or an existing crack is enlarged or an existing So that sheets enlarged Les is expires thousand, occurs a problem that sheets are damaged, there is a problem that can not be stably discrimination conveyance.

  Furthermore, as disclosed in, for example, Patent Document 2, if necessary, by setting the transport speed of the upper transport mechanism faster than the transport speed of the lower transport mechanism, the sheets on the upper transport path can be quickly moved. In the case of adopting a configuration for transferring to the next process, since the tensile force accompanying the difference in the conveyance speed is added to the hanging position, damage tends to be promoted. According to the suction mode in which suction is gradually performed from the head to the rear edge toward the upper transport mechanism, there is a phenomenon in which the restraints of the sheets become uneven on the left and right in the transport direction due to warpage or ablation of the sheets. Due to the unevenness of the left and right restraints, a phenomenon in which only one of the left and right sides of the sheets is conveyed faster than the other side is more likely to occur, which further promotes damage to the sheets. Tend to be Even escaped the wound, so that the adverse effect of conveying posture is disturbed sheets is to turn is induced.

  The present invention has been developed to eliminate the defects of the conventional known means. Specifically, the lower conveyance mechanism that supports a fixed sheet from below and conveys it to the lower conveyance path, and the sheets. When the sheets are selectively conveyed separately to the lower conveyance path and the upper conveyance path using a discrimination conveyance apparatus having an upper conveyance mechanism that holds the sheet from above and conveys the sheet to the upper conveyance path, As an upper transport mechanism, the holding start portion that starts to hold and transport the sheets has a length that is equal to or greater than the length of the sheets in the transport direction, and has an interval that is at least several times wider than the thickness of the sheets. A suction mechanism is provided in parallel with the lower transport mechanism, and has a suction member having a length corresponding to the length in the transport direction of the sheets facing the holding start portion. The upper transport mechanism provided In addition, whenever the entire fixed sheet to be distinguished to the upper conveyance path arrives below the suction member, the sheet is simultaneously sucked from the lower conveyance mechanism to the upper conveyance mechanism side via the suction mechanism. A discriminating and conveying method (Claim 1), a lower conveying mechanism that supports a standard sheet from below and conveys it to the lower conveying path, and holds the sheets from above and conveys them to the upper conveying path. An upper conveyance mechanism that selectively conveys the sheets to the lower conveyance path and the upper conveyance path. The sheet conveyance apparatus is a regular sheet differentiation conveyance apparatus, and holds the sheets as the upper conveyance mechanism. The holding start part to start conveying has a length equal to or longer than the length of the sheets in the conveying direction, and is parallel to the lower conveying mechanism with an interval at least several times wider than the thickness of the sheets. It is opposed to Therefore, an upper conveyance mechanism provided with a suction mechanism having a suction member having a length corresponding to the length of the sheet in the conveyance direction is provided at the holding start portion, and the upper conveyance path is discriminated. Controls the suction mechanism to operate intermittently so that the entire sheet of power-shaped sheets arrives below the suction member, so that the sheets are simultaneously sucked from the lower transport mechanism toward the upper transport mechanism. A discriminating and conveying apparatus comprising a control mechanism for carrying out the invention (Claim 2), a suction member having a single suction port, and a single on-off valve for opening and closing the suction port of the suction member. 3. A discriminating and conveying apparatus (Claim 3) according to claim 2, further comprising a control mechanism for controlling the one on-off valve to open and close in response to arrival and passage of a regular sheet. Divide into multiple parts in the transport direction A suction mechanism having a suction member having a split suction port and a plurality of on-off valves for individually opening and closing each suction port of the suction member, And a control mechanism for controlling the plurality of on-off valves to be individually closed according to the passage of the end portions of the sheets. Each of the sheets having a similar suction member at a position slightly opposite to the suction member of the suction mechanism, and having a similar suction member, and being transported by the lower transport mechanism The lower suction mechanism for adsorbing the sheet to the lower transport mechanism side is provided in the lower transport mechanism, and for the regular sheets to be distinguished from the upper transport path, the entire sheet is a suction member of the suction mechanism. Immediately before arriving below The discriminating and conveying apparatus according to claim 2, 3 or 4, wherein a function for controlling the operation of the lower adsorption mechanism so as to release the adsorption of a kind for a while is added to the control mechanism. And propose.

  According to the sheet separating and conveying method according to claim 1, each time the entire fixed sheet to be differentiated into the upper conveying path arrives below the suction member, the sheet is lowered through the suction mechanism. Since the sheets are transferred all at once from the lower transport mechanism to the upper transport mechanism side by simultaneously sucking from the transport mechanism to the upper transport mechanism side, at least the thickness of the sheets is between each transport mechanism. Even when there are several times wider intervals, there is no possibility that any part of the sheets will hang from any other part within the interval, even if the sheet has a very weak strength in the conveying direction. Even if it is a kind, it is possible to convey it stably without inducing damage such as the occurrence of cracks, and even if the sheets are non-planar with warping or aberration, Since the suction is performed at the same time, the left and right restraints are almost non-uniform, and the rotation of the sheets, including the case where the transport speed of the upper transport mechanism is set higher than the transport speed of the lower transport mechanism, etc. This also avoids the possibility of inducing new harmful effects. Thus, the discriminating and conveying apparatus according to claims 2 to 5 can be used for carrying out the discriminating and conveying method according to claim 1, and the discriminating and conveying apparatus according to claims 3 to 5. As will be described later, each has a characteristic corresponding to each configuration.

  In the following, the present invention will be described in further detail based on an example illustrated in the drawings. In the illustrated example, a single plate is shown as a representative example of sheets (conventional problems have occurred). (In a conveying state in the direction perpendicular to the fiber direction). In addition, when similar devices and mechanisms are used in different embodiments, the same reference numerals are given for convenience, and redundant description is omitted. The devices and mechanisms are merely representative examples, and do not give any particular limitation on specific forms. In short, any device that can perform a desired function is sufficient. If necessary, the design can be changed as appropriate.

  FIG. 1 is an explanatory schematic side view of a discriminating and conveying apparatus according to the present invention, and FIGS. 2 to 6 are explanatory diagrams of operating states of the discriminating and conveying apparatus illustrated in FIG. In the figure, reference numeral 1 denotes a lower transfer conveyor forming a lower transfer mechanism, which comprises an appropriate drive source 1e such as a rotating shaft 1a, a belt wheel 1b, a transfer belt 1c, 1d, a servo motor, etc. The rectangular veneer 4 (4a) having a length L in the direction perpendicular to the fiber direction, which is traveled in the direction indicated by the arrow in the direction shown in FIG. Is transferred to a desired next process (for example, a deposition process, a repair process, etc.) via the lower transfer path A shown in FIG.

  Reference numeral 2 denotes an upper transport conveyor that forms a part of the upper transport mechanism, which includes a rotary shaft 2a, a belt wheel 2b, a transport belt 2c, an appropriate drive source 2d, and the like, and is located on the upper side in the transport direction. The holding start portion that starts to hold and convey the single plate 4 (4a) in cooperation with the slipping suction mechanism 3 has a length S that is equal to or greater than the length L in the carrying direction of the single plate 4 (4a), and , Which are arranged in parallel with the lower transport mechanism 1 with an interval at least several times wider than the thickness of the single plate 4 (4a), and have an appropriate transport rate (for example, the same speed as the lower transport conveyor 1). The single plate 4 (4a) is held from above in cooperation with a suction mechanism 3, a suction mechanism 6 and the like, which will be described later, and the upper conveyance path B indicated by the arrow shown in FIG. To the next desired next process.

  Reference numeral 3 denotes a suction mechanism that forms another part of the upper transport mechanism. The suction mechanism 3 has a suction port 3g having a length W corresponding to the length L in the transport direction of the single plate 4 (4a). A suction hood 3a which is a suction member provided with a partition wall 3b for equalizing force, a suction machine 3c provided with an appropriate drive source 3d, an on-off valve 3e which can be reciprocated in the direction of the arrow, and the on-off valve 3e The suction hood 3a is disposed with the suction port 3g of the suction hood 3a facing the holding start portion of the upper conveyor 2, and will be described later. By obtaining the control of the mechanism 7 and opening and closing the on-off valve 3e in a timely manner, the single plate 4a that is present on the lower transport conveyor 1 and should be discriminated to the upper transport path side is sucked upward. In cooperation, holding the veneer 4 (4a) from above, It is conveyed to a desired next process via the partial conveyance path B.

  Reference numeral 5 denotes a single plate detector composed of a reflective phototube or the like disposed in the intermediate portion of the lower transfer conveyor 1, and the entire single plate 4a to be distinguished from the upper transfer path B is the suction hood 3a. A single plate detection signal is transmitted to the control mechanism 7 which will be described later.

  6 is a suction mechanism having a configuration similar to the configuration of the suction mechanism 3, and includes a suction hood 6a, a suction machine 6c, an on-off valve 6e, and the like. By opening and closing the on-off valve 6e, a single plate to be discriminated to the upper conveying path side in cooperation with the upper conveying conveyor 2 at the holding continuation site following the holding start site of the upper conveying conveyor 2 4 (4a) is held from above, and is transferred to a desired next process via the upper transfer path B indicated by the arrow in the drawing. Since the suction mechanism only needs to continuously suck the single plate that has already been sucked to the upper transport mechanism by the suction mechanism, the suction force can be weaker than the suction force of the suction mechanism. The suction force sufficient to suck and raise the veneer conveyed by the sheet is unnecessary, and the interval between the veneers conveyed by the lower conveyance mechanism is narrowed as in the embodiment of FIG. 13 or FIG. 17 described later. In the discriminating and conveying apparatus for achieving the above, it is preferable that the suction force of the suction mechanism is made as weak as possible within a range where there is no practical problem.

  7 is a control mechanism for controlling the operation of each device, and controls the lower conveyor 1 and the upper conveyor 2 to always run in the direction of the arrow shown in the drawing via the drive sources 1e and 2d. The on-off valves 3e and 6e are controlled so as to be in a closed state (see FIG. 2) in a normal state. In addition, a warning signal from an appropriate signal source that notifies the arrival of the veneer 4a on the lower conveyance conveyor 1 and to be distinguished to the upper conveyance path side, for example, a push button switch operation by an operator. A single-plate detector 5 for detecting that a warning signal x from an appropriate signal source such as a warning signal to be emitted is input from the outside and that the whole of the single plate 4a has arrived below the suction hood 3a. Only when a single plate detection signal is input from the valve, the on-off valves 3e and 6e are controlled to be in an open state, and further, for example, a time lapse signal of a timing mechanism such as a timer, or for example, in each suction hood If the entire single plate 4a is out of the operating area of the suction mechanism 3 based on a single plate passage signal of a single plate passage detector (not shown) made of a reflective photoelectric tube or the like provided immediately after the conveyance direction. The on-off valve 3e and the adsorption mechanism 6 When it is out of the operating area, the on-off valve 6e is controlled to return to the closed state.

  The discriminating and conveying apparatus according to the present invention is configured as described above, for example, and its operation mode will be described with reference to the explanatory diagrams of FIGS. 2 to 6. However, as illustrated in FIG. 2, for example, in the case of the single plate 4 that should be discriminated to the lower conveyance path side, the warning signal is not input to the control mechanism 7, so the single plate 4 arrives at the position of the single plate detector 5. Even if a single plate detection signal is issued from the single plate detector 5, the on-off valves 3e and 6e remain closed, and the single plate 4 is conveyed as it is to the lower conveyance path A by the lower conveyance conveyor 1. The

  On the other hand, when the veneer conveyed by the lower conveying conveyor is a veneer 4a to be discriminated to the upper conveying path as illustrated in FIG. 3, a notice signal x is input to the control mechanism 7 from the outside. When the single plate 4a arrives at the position of the single plate detector 5, a single plate detection signal is issued from the single plate detector 5, and the control mechanism 7 rotates the on-off valves 3e and 6e to the open state. As shown by the arrows in the figure, the plates 4a are sucked and raised all at once toward the upper conveyance conveyor 2, and thereafter, as illustrated in the order of FIGS. 4, 5, and 6, the upper conveyance conveyor 2 moves to the upper conveyance path B. Be transported.

  Further, as illustrated in FIG. 5, the control mechanism 7 operates the on-off valve 3e when the whole of the single plate 4a is out of the operating area of the suction mechanism 3, and the operation of the adsorption mechanism 6 as illustrated in FIG. When it is out of the zone, the on-off valve 6e is controlled so as to return to the closed state, and then it waits for the arrival of the single plate 4a to be discriminated to the upper conveyance path side.

  Hereinafter, in the case of the single plate 4 to be discriminated to the lower conveyance path side by repeating the same operation, the single plate to be conveyed to the lower conveyance path A and to be distinguished to the upper conveyance path without operating the suction mechanism 3. Only 4a is transported to the upper transport path B by being sucked by the suction mechanism 3, but when discriminating, the single plate is sucked and raised all over the entire length in the transport direction as described above. Therefore, even if the veneer to be processed is a very thin veneer or a thick veneer that already has cracks, there is no risk of inducing new cracks or expanding existing cracks. It can be transported in a stable manner, and even if the veneer has a non-flat shape such as warping or ablation, it is sucked all at once, so there is almost no uneven left and right restraint, The transport speed of the upper transport mechanism is the same as the transport speed of the lower transport mechanism. Including when setting faster than, a risk that newly induced harmful effects turning such single plate is avoided together.

  The discriminating and conveying apparatus configured as in the above embodiment has an advantage that the structure is relatively simple as is apparent from the drawing, but on the other hand, it is necessary to avoid the erroneous suction of the following single plate. The interval between the single plates conveyed by the conveyance mechanism needs to be relatively wide (preferably equal to or longer than the length of the single plates in the conveyance direction). However, in the case of adopting a configuration in which the transport speed of the upper transport mechanism is set higher than the transport speed of the lower transport mechanism, the interval between the single plates will be sequentially increased along with the discrimination. An interval equal to or greater than the length of the veneer in the conveyance direction is not necessarily required.

  Next, FIG. 7 is an explanatory schematic side view of a different embodiment of the discriminating and conveying apparatus according to the present invention. Instead of the suction mechanism 3 and the suction mechanism 6 in the discriminating and conveying apparatus illustrated in FIG. A suction hood 8a, which is a suction member having a suction port 8g having a length W corresponding to the length L in the conveying direction of the single plate 4 (4a) and having a partition wall 8b for equalizing the suction force. A suction machine 8c having an appropriate drive source 8d and a small section of the suction port 8g divided into a plurality of parts by the partition wall 8b are arranged separately, and each can reciprocate in the direction of the arrow shown in the figure. A suction mechanism 8 having a plurality of on-off valves 8e, an operating member 8f composed of a fluid cylinder for individually reciprocatingly rotating each on-off valve 8e, and a suction mechanism 9 having a configuration similar to the configuration of the suction mechanism 8. In addition to the control mechanism 7 in the above-described discrimination conveying device, 8 and the suction mechanism 9 is constructed by a control mechanism 10 for controlling as follows.

  That is, in the normal state, the control mechanism 10 controls the on-off valve 8e of the suction mechanism 8 and the on-off valve 9e of the adsorption mechanism 9 to be in a closed state as illustrated in FIG. As for the on-off valve 8e of the suction mechanism 8, an appropriate notice signal x is inputted from the outside to notify the arrival of the veneer 4a that is on the lower conveyance conveyor 1 and should be discriminated to the upper conveyance path side. Only when a single plate detection signal is input from the single plate detector 5 that detects that the entire single plate 4a has arrived below the suction hood 3a, as shown in FIG. The valves 8e are controlled so as to be opened at the same time, and on the basis of a time lapse signal or the like of an appropriate time mechanism, as shown in FIGS. The valve 8e is sequentially controlled to return to the closed state, and the on-off valve 9e of the adsorption mechanism 9 is controlled by the suction mechanism 8 as illustrated in FIG. 10 and FIG. The tip of the veneer 4a sucked to the upper conveyance path side Control is performed so that the opening / closing valve 9e at the incoming position is sequentially opened, and as illustrated in FIG. 12, the switching valve 9e at the position where the rear end of the single plate 4a passes is sequentially returned to the closed state. To do.

  The operation mode of the discriminating and conveying apparatus configured as described above will be described with reference to the explanatory views of FIGS. 8 to 12. When the veneer conveyed by the lower conveying conveyor is, for example, illustrated in FIG. In the case of the single plate 4 to be discriminated to the conveyance path side, no notice signal is input to the control mechanism 10, so that the single plate 4 arrives at the position of the single plate detector 5 and the single plate 4 from the single plate detector 5 Even if the plate detection signal is issued, the plurality of on-off valves 8e of the suction mechanism 8 and the on-off valve 9e of the suction mechanism 9 remain closed, and the veneer 4 is transported to the lower transport path A by the lower transport conveyor 1 as it is. Is done.

  On the other hand, when the veneer conveyed by the lower conveyance conveyor is a veneer 4a to be distinguished to the upper conveyance path side as illustrated in FIG. 9, a notice signal x is input to the control mechanism 10 from the outside. When the single plate 4a arrives at the position of the single plate detector 5, a single plate detection signal is issued from the single plate detector 5, and the control mechanism 10 opens the plurality of on-off valves 8e of the suction mechanism 8 all at once. Since the single plate 4a is rotated, the single plate 4a is sucked and raised all at once toward the upper transport conveyor 2 as shown by the arrow in the figure. Then, as illustrated in the order of FIG. 10 and FIG. Since the opening / closing valve 9 of the suction mechanism 9 at the position where the tip arrives is sequentially rotated to the open state, the single plate 4a is transported to the upper transport path B by the upper transport conveyor 2.

  Further, as illustrated in FIGS. 10, 11, and 12, the control mechanism 10 includes an opening / closing valve 8 e of the suction mechanism 8 and an opening / closing valve 9 of the adsorption mechanism 9 at a location where the rear end of the single plate 4 a has passed. Control is performed so as to sequentially return to the closed state to prevent erroneous suction of the succeeding single plate 4 (4a), and the next single plate 4a to be discriminated to the upper conveyance path side is put on standby.

  Hereinafter, in the case of the single plate 4 to be discriminated to the lower conveyance path side by repeating the same operation, the single plate to be conveyed to the lower conveyance path A and to be distinguished to the upper conveyance path without operating the suction mechanism 8. Only the 4a is sucked by the suction mechanism 8 to be transported to the upper transport path B. The discriminating transport apparatus configured as described above has a structure that is different from that of the discriminating transport apparatus illustrated in FIG. However, since the suction port of the suction member of the suction mechanism is subdivided and each suction port can be opened and closed individually, the interval between the single plates transported by the lower transport mechanism is Even if it is significantly narrower than in the case of the discriminating and conveying apparatus illustrated in FIG. 1, there is no possibility that the succeeding single plate 4 (4a) will be erroneously sucked. Processing can take place.

  However, there is a certain limit to the method of narrowing the interval between single plates conveyed by the lower conveyance mechanism by subdividing the suction holes of the suction member of the suction mechanism and opening and closing each suction port individually. If the suction port of the suction member is extremely subdivided, not only the structure of the device and the control of the on-off valve will become very complicated, but also the suction efficiency will be significantly reduced due to the obstruction of air flow due to the presence of the partition wall This is impractical. Therefore, a discrimination transport device having the following configuration is proposed as a discrimination transport device suitable for narrowing the interval between single plates transported by the lower transport mechanism.

  FIG. 13 is an explanatory schematic side view of still another embodiment of the discriminating and conveying apparatus according to the present invention. In addition to the configuration of the discriminating and conveying apparatus illustrated in FIG. 1 (or FIG. 7), the suction mechanism The suction hood has a configuration similar to that of the suction mechanism 6 (or 9) at a position slightly opposite to the upper side of the 3 (or 8) suction hood 3a (or 8a) in the conveying direction. 6a (or 9a), suction machine 6c (or 9c), open / close valve 6e (or 9e), etc., and the single plate 4 (4a) conveyed by the lower conveyor 1 to the lower conveyor The lower suction mechanism 6A (or 9A) to be adsorbed is provided in the lower transport conveyor 1 and the on-off valve 6e (or 9e) of the lower suction mechanism 6A (or 9A) is opened in a normal state. In addition to controlling the state (see FIG. 14), an appropriate discrimination signal based on, for example, the preceding notice signal is obtained, and the lower conveyor 1 Of the single plates (4, 4a) conveyed in this manner, only the single plate 4a to be discriminated to the upper conveyance path B, the whole single plate 4a is sucked by the suction mechanism 3 (or 8). The control mechanism 7 has a function of controlling the operation of the lower suction mechanism 6A (or 9A) so that the suction of the single plate 4a is released for a while immediately before reaching the lower side of the hood 3a (or 8a). (Or 10).

  The operation mode of the discriminating and conveying apparatus having the above-described configuration will be described with reference to the explanatory diagrams of FIGS. 14 to 16. As illustrated in FIG. 14, for example, the single plate conveyed by the lower conveying conveyor is as follows. In the case of the single plate 4 to be discriminated to the lower conveyance path side, the control mechanism 7 (or 10) keeps the open / close valve 6e (or 9e) of the lower adsorption mechanism 6A (or 9A) in an open state. maintain. As described above, in the case of the single plate 4 to be discriminated to the lower conveyance path side, since the warning signal is not input to the control mechanism 7 (or 10), the single plate 4 is located at the position of the single plate detector 5. Even if a single plate detection signal is issued from the single plate detector 5, the open / close valve 3e (or 8e) of the suction mechanism 3 (or 8) and the open / close valve 6 of the suction mechanism 6 (or 9) are opened and closed. Since the valve 6e (or 9e) remains closed, the veneer 4 is conveyed to the lower conveying path A by the lower conveying conveyor 1 as it is.

  On the other hand, when the veneer conveyed by the lower conveyance conveyor is the veneer 4a to be distinguished to the upper conveyance path side as illustrated in FIG. 15, the control mechanism 7 (or 10) causes the veneer 4a. Immediately below the suction hood 3a (or 8a) of the suction mechanism 3 (or 8), the lower suction mechanism 6A (or 9A) is opened so that the suction of the single plate 4a is temporarily released. At the same time, a warning signal x is inputted to the control mechanism 7 (or 10) from the outside, and the single plate 4a arrives at the position of the single plate detector 5, and the single plate detector 5 When the plate detection signal is issued, the control mechanism 7 (or 10) rotates the on-off valve 3e (or 8e) of the suction mechanism 3 (or 8) to the open state, so that the single plate 4a is shown by an arrow in the drawing. As shown in Fig. 4, the suction is lifted all at once to the upper conveyor 2 side, and in addition, the on-off valve 6e (or 9e) of the adsorption mechanism 6 (or 9) is opened. Since turning the release state, since, as illustrated in FIG. 16, the upper conveyor 2 is conveyed to the upper conveying path B.

  Thus, as illustrated in FIG. 16, when the single plate 4 a is lifted by the suction mechanism 3 (or 8) and is transported to the upper transport path B by the upper transport conveyor 2, the following single unit 4 a is The suction force of the suction mechanism 3 (or 8) also reaches the tip of the plate (4, 4a), but the control mechanism 7 (or 10) temporarily releases the suction of the single plate 4a. Thereafter, as illustrated in FIG. 16, the opening / closing valve 6e (or 9e) of the lower adsorption mechanism 6A (or 9A) is quickly returned to the open state, and the leading end of the subsequent single plate (4, 4a) is moved. , Even if there is no space between the rear end of the preceding veneer 4a and the front end of the subsequent veneer (4, 4a) (interval with respect to the horizontal direction) There is no possibility that the tip of the single plate (4, 4a) that is to be sucked and raised by mistake to the upper conveyor 2 side is shown in FIG. Compared to the discrimination conveying apparatus of the embodiment shown, further drives out conveying density of more extensive veneer, stably discrimination processing may be performed.

  In this connection, the lower suction mechanism is designed to prevent the tip portion from being accidentally lifted even if the suction force of the suction mechanism 3 (or 8) reaches the tip portion of the subsequent single plate (4, 4a). Since it is sufficient to attract the carrier to the conveyor, the suction force can be significantly weaker than the suction force of the suction mechanism 3 (or 8). Rather, it is already sucked by the upper conveyor. Further, it is preferable to make it as weak as possible within a practically unaffected range so as not to adversely affect the suction of the single plate 4a.

  When the lower suction mechanism 9A having a configuration similar to the configuration of the suction mechanism 9 is used as the lower suction mechanism, as shown in FIG. 17, for example, FIG. It is preferable to control so that the opening / closing valve 9e at the position where the tip of the single plate (4, 4a) conveyed by the lower conveyor is opened is sequentially opened.

  However, when adopting a configuration in which the transport speed of the upper transport mechanism is set to be higher than the transport speed of the lower transport mechanism, the interval between the single plates gradually increases with the discrimination. The possibility that the suction force of the suction mechanism may adversely affect a single plate other than the desired single plate tends to gradually decrease after discrimination.

  In each of the above-described embodiments, as a sorting means for classifying whether or not a single plate to be distinguished to the upper conveyance path side, a notice signal for notifying the arrival of the single plate to be distinguished to the upper conveyance path side, Although the sorting means is configured to transmit to the control mechanism from the outside, the sorting means is not limited to such a configuration and is not illustrated, but for example, a single plate to be discriminated on the lower conveyance path side has arrived In this case, the function of the single plate detector 5 is temporarily stopped and the function of the single plate detector 5 is exhibited only when a single plate to be discriminated comes to the upper conveyance path side. There is no problem even if it is a sorting means, and in short, any sorting means that can perform sorting in a timely manner is sufficient, and there are no particular restrictions on the sorting means, including discrimination criteria for what kind of discrimination is performed.

  Incidentally, in the discrimination transport method and the discrimination transport device according to the present invention, the interval between the lower transport mechanism and the upper transport mechanism is set to at least several times the thickness of the sheets. When the sheets have warping or ablation, and the sheets come into contact with both transport mechanisms at the same time, they are crushed sequentially from the end or due to the difference in transport speed, This is to eliminate the chance that the conveying posture of the sheets is disturbed or torn, and the specific interval value may be determined based on experiments in order to adapt to the properties of the sheets to be processed.

  Further, although the illustration of the engagement mode between the upper transport mechanism and the suction mechanism (and the suction mechanism) in this type of transport device is omitted, for example, the suction member (the illustrated embodiment) of the suction mechanism (and the suction mechanism). In this embodiment, the suction hood is provided on at least one side (preferably on both sides) with the conveying member (conveying belt in the illustrated embodiment) of the upper conveying mechanism positioned at the same side, or for example, the upper part. An endless perforated transport belt having a large number of suction ports is used as a transport member of the transport mechanism, and the suction port of the suction member of the suction mechanism faces the inner peripheral surface of the perforated transport belt. Engagement modes and the like are known, and any of them can be adopted.

  Further, as is clear from the embodiment of FIG. 17, the specific combination of the suction mechanism, the suction mechanism, and the lower suction mechanism is not particularly limited. A mechanism, for example, a suction member is divided into a plurality of sheets in the conveying direction of the sheets, and each of the divided plurality of suction members is provided with a suction machine and an opening / closing valve, and the opening / closing control is performed separately. It can be used in various combinations including a suction mechanism or a mechanism other than the illustrated embodiment, such as a suction mechanism that uses a shutter-type on-off valve instead of a rotary on-off valve. In short, it is sufficient if each mechanism has a desired function.

  In each of the above embodiments, the transport path of the lower transport path from immediately before to after the discrimination process is bent in a U-shape, and the transport path of the upper transport path is made straight. The mode of the transport path of each transport path is not limited to such a mode and is not shown. For example, the transport path of the lower transport path is straight, and the transport path of the upper transport path is reversed. Or a mode in which the transport path of the lower transport path is shaped like a letter and the transport path of the upper transport path is shaped like a reverse letter, and further, for example, a mode in which the transport paths of both the transport paths are straight In short, it is sufficient that the holding start portion of the upper transport mechanism that forms the upper transport path is parallel to the lower transport mechanism that forms the lower transport path, and the design may be changed as appropriate.

  Of course, there are no particular restrictions on the processing mode of the sheets after discrimination by the discrimination transport method (and discrimination transport device) according to the present invention, and the desired processing such as deposition processing, repair processing, sticking processing, etc. It can be done.

  As is clear from the above, according to the sheet conveying method and the sheet conveying apparatus according to the present invention, even if the sheet is very weak in the conveying direction, the lower part is not caused without causing damage to the sheet. Since it can be accurately conveyed to the conveying path and the upper conveying path, it can be used in various fields, and it can be used without difficulty for processing sheets with normal strength in the conveying direction. Its availability is tremendous.

It is a schematic side explanatory drawing of the discrimination conveyance apparatus which concerns on this invention. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is a schematic side surface explanatory drawing of the Example from which the discrimination conveying apparatus based on this invention differs. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is a schematic side surface explanatory drawing of another Example of the discrimination conveyance apparatus which concerns on this invention. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is explanatory drawing of the operation state of the discrimination conveyance apparatus illustrated in FIG. It is a schematic side surface explanatory drawing of another Example of the discrimination conveyance apparatus which concerns on this invention.

Explanation of symbols

1: Lower transfer conveyor 2: Upper transfer conveyor 3 and 8: Suction mechanism 3e and 8e: Opening and closing valve 4 of the suction mechanism 4: Single plate 4a to be differentiated to the lower transfer path 5: Single plate 5 to be distinguished to the upper transfer path Plate detectors 6, 9: Adsorption mechanisms 6A, 9A: Lower adsorption mechanisms 6e, 9e: Adsorption mechanism and on-off valves 7, 10 of the lower adsorption mechanism: Control mechanism
A: Lower conveyance path
B: Upper transport path
L: Length of the single plate in the direction perpendicular to the fiber direction
S: Length of the upper conveyance conveyor holding start part
W: Length of suction port of suction hood

Claims (5)

  A discriminating and conveying apparatus for a regular sheet having a lower conveyance mechanism that supports a regular sheet from below and conveys it to the lower conveyance path, and an upper conveyance mechanism that holds the sheets from above and conveys them to the upper conveyance path. , And a conveying method for selectively conveying the sheets to a lower conveying path and an upper conveying path, wherein a holding start site that starts holding and conveying the sheets is used as an upper conveying mechanism of the discriminating conveying device. The sheet has a length equal to or greater than the length of the sheet in the conveyance direction, and is spaced in parallel with the lower conveyance mechanism with an interval at least several times wider than the thickness of the sheet. In addition, an upper conveyance mechanism provided with a suction mechanism having a suction member having a length corresponding to the length in the conveyance direction of the sheets is used at the holding start portion, and a fixed form to be distinguished from the upper conveyance path Sheets of Each time the body arrives below the suction member, the sheets are sucked all at once from the lower transport mechanism to the upper transport mechanism through the suction mechanism, and conveyed in a discriminative manner. Discrimination transfer method.   It has a lower conveyance mechanism that supports regular sheets from below and conveys them to the lower conveyance path, and an upper conveyance mechanism that holds the sheets from above and conveys them to the upper conveyance path. A sheet conveying device that selectively conveys a sheet to a path and an upper conveying path, wherein the upper conveyance mechanism has a holding start portion that starts holding and conveying the sheets in a conveying direction of the sheets. It has a length equal to or longer than the length, and is spaced in parallel with the lower transport mechanism at an interval that is at least several times wider than the thickness of the sheets. While using an upper conveyance mechanism provided with a suction mechanism that faces a suction member having a length corresponding to the length in the conveyance direction of the sheets, the entire fixed sheet to be distinguished from the upper conveyance path is Coming below the suction member Each of the fixed-size sheets is provided with a control mechanism for controlling the suction mechanism to be intermittently operated so that the sheets are simultaneously sucked from the lower conveyance mechanism to the upper conveyance mechanism side. Discrimination transport device.   A suction mechanism having a suction member having a single suction port and a single on-off valve for opening and closing the suction port of the suction member, and the one opening and closing unit according to the arrival and passage of the regular sheet 3. The sheet conveying device for regular sheets according to claim 2, further comprising a control mechanism for controlling the valve to open and close.   And a suction mechanism having a suction member having a plurality of suction ports divided in the transport direction of the upper transport mechanism, and a plurality of on-off valves that individually open and close each suction port of the suction member. The plurality of on-off valves are controlled to open at the same time as the sheets arrive, and the plurality of on-off valves are individually closed according to the passage of the end of the sheets. The discriminating and conveying apparatus for a regular sheet according to claim 2, further comprising a control mechanism.   A lower part that has a similar suction member at a position slightly on the upper side in the transport direction from directly below the suction member of the suction mechanism, and sucks each sheet transported by the lower transport mechanism to the lower transport mechanism side In addition to the adsorbing mechanism attached to the lower conveyance mechanism, the sheet is limited to the regular sheet to be discriminated to the upper conveyance path immediately before the entire sheet arrives below the suction member of the suction mechanism. 5. The discriminating and conveying apparatus for a regular sheet according to claim 2, 3 or 4, wherein a function for controlling the operation of the lower suction mechanism so as to release the suction of the sheet for a while is provided in the control mechanism.

Images