JP2017023982A - Pleat folding device of filter sheet material and pleat folding method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pleat folding device of a filter sheet material capable of efficiently mass-producing a high quality product by making bacteria hard to stick to a human hand.SOLUTION: Pleat folding devices 100 and 200 of a filter sheet material for continuously forming a pleat alternately based on N pieces of folds P1-P12 in a ridge-folding L and a bottom-folding V along a diameter of crossing so as to form a bellows-shaped conical surface of a circular sheet-like filter material 1, comprises fold forming means 3, 4, 30 and 40 for forming N pieces of folds P1-P12 along the respective diameters of crossing by a central angle of (180°/N) in the filter material 1, a temporary folding mechanism 60 for undulating a bellows-shaped pleat by adding folding pressure of a damage limit or less to the folds P1-P12 formed in the filter material 1, and the final tooling mechanism 80 for finishing by pressing the pleat temporarily folded by the temporary folding mechanism 60 against a pan 82 by an upper die 81.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a filter sheet material fold-folding apparatus and a fold-folding method thereof, and more particularly, to form a conical surface with a continuous bellows-like crease in a sheet-like filter material and to follow the inner surface of the funnel. The present invention relates to a fold-folding apparatus and a fold-folding method for a filtration sheet material that is three-dimensionalized in such a shape.

  As a reference for the material and shape of disposable filter paper used for experiments, analysis of samples, etc., or food analysis / inspection equipment, as a disposable paper filter used for drip coffee extraction, The thing of the shape which follows is known. For example, there is a description extracted from the paragraphs [0037] to [0038] of the specification of Patent Document 1 and shown in parentheses below. Note that FIG. 6 (II) in the excerpt is not attached to this application.

  “As shown in FIG. 6 (II), the filter paper 20C is valley-folded from the center at a pair of inner folding portions 25, 25 and a pair of inner folding portions 26, 26 at intervals of 90 degrees. Between the inner folding portions 25 and 26, the folds and valleys are alternately and radially folded from the center of the filter paper 20C, so that the filter paper 20C is divided into a pair of inner folding portions 25 and 25 and a pair of inner folding portions. The front part 11C and the rear part 12C are formed by folding at 26, 26. Next, if the mountain folds and the valley folds are alternately made between the adjacent side edges 15, 16, the bellows-like side parts 13C, 13C are formed. Then, the filter paper 20C can be formed in a funnel shape in which the side surfaces 13C and 13C are formed in a bellows shape, and finally, the lower end portion 19 of the filter paper 20C formed in a funnel shape is folded. If the straight base 19a is formed, coffee It is possible to form the filter 10C. "

  Patent Document 2 discloses a liquid filtration instrument and a dry analytical element that have a simple structure and are inexpensive. Liquid filtration equipment for filtering liquid under reduced pressure, especially liquid filtration equipment suitably used for preparing plasma or serum samples from blood of humans or other animals, and body fluids such as blood and urine under reduced pressure filtration A dry analytical element for analysis is disclosed. The liquid filtration instrument obtains a filtrate by vacuum filtration, and includes a filter member in which the liquid filtration filter is accommodated and a holder member that stores the filtrate that has passed through the liquid filtration filter. The filter member and the holder member are formed such that they can be fitted so as to be substantially airtight and watertight at the time of decompression.

  Since the filter member described in Patent Document 2 is frequently used in chemical experiments and the like, further cost reduction is desired. In addition, when using filter members or dry analytical elements to analyze body fluids such as blood or urine, they are often sterilized and disposable after use, thus reducing the cost of the filter members and dry analytical elements. Becomes more important.

JP 2001-327408 A JP 2006-38525 A

  However, Patent Document 1 does not disclose a manufacturing apparatus or a manufacturing method for mass-producing the filter member. That is, it is provided through a paper folding process that alternately folds and troughs radially from the center of the filter paper, but there is no disclosure about a pleat folding device for a specific filter sheet material, and at present depends on manpower It is estimated that In addition, from the viewpoint of food hygiene, there is a demand to complete the manufacturing process without touching as much as possible. Further, if mass production is required, further contrivance is indispensable for the manufacturing apparatus.

  In addition, as in the food analysis / inspection equipment, Patent Document 2 discloses a high and homogeneous filtration performance based on shape identity and a pollution repellent performance far superior to that of a coffee filter, that is, a pollution protection property from a hand hood, etc. There are demands for dustproof cleanliness and performance to ensure antibacterial properties, considerable toughness, and simplicity and low cost. In response to this demand, manufacturing apparatuses and manufacturing methods for mass-producing the filter members It is not disclosed until.

  The present invention has been made in view of such problems, and the object of the present invention is to provide a fold-folding process that is completed without touching the sheet-like filtration material as much as possible, such as bacteria and contaminants. It is easy to avoid the problem of adhering from human hands, the problem of breaking the filtration material during the fold folding process, and the problem of lack of shape identity that guarantees high and uniform filtration performance. An object of the present invention is to provide a filter sheet material fold folding apparatus and a fold folding method thereof which can complete a crease forming process efficiently in a short time and fully automatically.

  The present invention has been made to achieve such an object, and the invention according to claim 1 has a diameter intersecting so as to form a bellows-like conical surface by a circular sheet-like filter material (1). A fold folding device (100, 200) for a filtration sheet material that continuously forms folds based on N folds (P1 to P12) alternately with mountain folds (L) and valley folds (V), Folding means (3, 4, 30, 40) for attaching the N folds (P1 to P12) along each of the diameters intersecting the filtering material (1) by the central angle of (180 ° / N) A temporary folding mechanism (60) that applies folding pressure below the breakage limit to the folds (P1 to P12) formed in the filtration material (1) to cause the bellows-like folds to undulate, and the temporary folding mechanism (60 The upper fold (81) A pan (82) final embossed mechanism finished by pressing the (80), characterized by comprising a.

  The invention according to claim 2 is the filter sheet material fold device according to claim 1, wherein the supplied one piece of the filtering material (1) is used as the crease means (30, 40). It has N grooves (D1 to D12) engraved along respective diameters intersecting with a center angle of (180 ° / N) in a mountable circle, and (360 ° / N) rotation The turntable (30) which repeats the stop, and the disk roller (41) from the upper surface of the filtration material (1) placed on the turntable (30) in the rotation stop, the N grooves (D1 to D12) A roller driving mechanism (40) for applying the folds (P1 to P12) to the filtration material (1) according to the arrangement of the grooves (D1 to D12) by rolling while pushing each one of While the disk roller (41) is retracted A sheet turnover mechanism (50) that drives the filter material (1) on the turntable (30) to turn over after rotating the turntable (30) in an arbitrary rotation direction (F) (180 ° / N). ), And the roller driving mechanism (40) completes the first half of the crease on one surface of the filtering material (1), the sheet turning mechanism (50) is driven to turn on the turntable (30). And a control unit (90) for executing the latter half of the process of turning the filter material (1) over and then folding the other surface of the filter material (1).

  Further, the invention according to claim 3 is the filter sheet material fold device according to claim 2, wherein a material standby container (10) for laminating a large number of filtration materials (1) and waiting, and the material standby A single sheet gripping mechanism (20) for holding the filtration material (1) waiting in a container (10) one by one and placing it on the turntable (30), and from the turntable (30) to the temporary A moving mechanism (70) for moving and loading the filtering material (1) to the folding mechanism (60), and the controller (90) is configured to count the number of times K is creased by the roller driving mechanism (40). And when the number of times K = (N / 2) defined in the first half process is reached, the sheet turning mechanism (50) is driven while the disk roller (41) is retracted, Furthermore, the number of times specified in the latter half process K = N / 2) only after the operation of the creasing, and controls to move the filter material (1) by the moving mechanism (70).

  Further, the invention according to claim 4 is the fold-folding device for the filter sheet material according to claim 1, wherein the one sheet of the filtering material (1) to be supplied is used as the crease means (3, 4). The filtration material has grooves and ridges corresponding to a part (P1, P4, P7, P10) or all (P1 to P12) of the N folds (P1 to P12) in a circle that can be sandwiched. (1) An upper mold (3) and a lower mold (4) that are face-to-face sandwiched from both sides, and at least one of the upper mold (3) and the lower mold (4) By being relatively and intermittently rotatable with respect to the filtering material (1) to be face-to-face fitted, the protrusions are face-to-face fitted into the groove in a plurality of times with the intermittent rotation. The crease press is completed.

  Further, the invention according to claim 5 alternates between mountain fold (L) and valley fold (V) along the intersecting diameter so as to form a bellows-shaped conical surface by the circular sheet-like filter material (1). A pleat fold method for continuously forming pleats based on N folds (P1 to P12), along each of the diameters intersecting the filtration material (1) with a central angle of (180 ° / N). A crease process (S20 to S40) for attaching the N fold lines (P1 to P12) and a crease (P1 to P12) formed on the filter material (1) in the crease process (S20 to S40). A temporary folding step (S60) in which a folding pressure below the breakage limit is applied by the temporary folding mechanism (60) to undulate the bellows, and the bellows-like folds temporarily folded in the temporary folding step (S60) The pushing mechanism (80) is the upper die (81) Only a pan (82) step (S70) pressing the final type finish is pressed in, characterized by comprising a.

  According to the present invention, it is a fold folding process that is completed without touching the sheet-like filtration material as much as possible, so that bacteria and contaminants adhere from human hands, and during the fold folding process. It is easy to avoid problems that break filter materials and defects that lack the same shape that guarantees high and uniform filtration performance. The process of creasing and forming a single filter material can be completed quickly and efficiently, and fully automatically. It is possible to provide a fold-folding device and a fold-folding method for a filtration sheet material.

1 is a perspective view showing a fold-fold filter paper formed by a fold-folding device (hereinafter also referred to as “this device”) or a fold-folding method (hereinafter also referred to as “this method”) of a filter sheet material according to an embodiment of the present invention. is there. It is a top view which shows the turntable of this apparatus. It is explanatory drawing which shows the procedure which creases a filter sheet material with this apparatus or this method. It is a model explanatory view for explaining an outline of this device. It is a schematic front view of the single sheet gripping mechanism of this apparatus. It is (A) schematic front view, (B) top view of upper mold | type, (C) top view of the saucer equivalent to a lower mold | type for demonstrating the temporary folding mechanism and final mold pushing mechanism of this apparatus. It is a flowchart for demonstrating the procedure of this method. It is explanatory drawing which shows the procedure which creases a filtration sheet | seat material by the modified Example of this apparatus.

[Basic example]
A basic embodiment of the present invention will be described below with reference to FIGS. First, after describing a pleat folding method using a fold-fold filter paper as a finished product and a turntable in which grooves for making creases are engraved, the apparatus will be described in detail.

  FIG. 1 is a perspective view showing an embodiment of a fold-fold filter paper formed by a fold-folding device or fold-folding method for a filter sheet material according to an embodiment of the present invention. A fold-fold filter paper 1X shown in FIG. 1 has a fold line P1-fold line alternately with a mountain fold L and a valley fold V along a crossing diameter with respect to a circular sheet-like filter material (hereinafter also referred to as "circular filter paper") 1. It is a finished product that is three-dimensionalized into a shape that forms a bellows-shaped conical surface along the inner surface of the funnel by forming continuous pleats with P12. Note that the fold-fold filter paper 1X has a conical surface shaped like a bellows in order to increase the filtration area and enhance the filtration effect as compared with a simple conical surface.

  This fold-fold filter paper 1X is, for example, a regular used for inspection equipment in the field of food-related analysis and environmental analysis performed at 135 food sanitation law registered inspection organizations operating in Japan and 1722 measurement certification establishments.・ There is a high possibility of being adopted as consumables. Further, the fold-fold filter paper 1X is also suitable as a disposable filter paper (paper filter) used for a relatively large drip coffee maker for offices or the like, although the use is different. Note that the circular sheet-shaped filtration material is not limited to paper, and any other material may be used as long as it is a foldable sheet-shaped filtration material having a filtration function.

  FIG. 2 is a plan view showing a turntable of the present apparatus, which constitutes a main part of the apparatus 100 described later with reference to FIG. As shown in FIG. 2, the turntable 30 is a circular table suitable for placing a single circular filter paper 1 without protruding, and is rotatably supported with respect to a vertical axis. On the surface of the turntable 30, N = 12 grooves D1 to D12 are engraved along the diameter so as to form a V-shaped cross section (see Dn in FIG. 4).

  Further, N is an even number of 4 or more, and in the present embodiment, the illustration is explained by an example in which N = 12. The grooves D1 to D12 intersect with each other at a center angle of (180 ° / N) = 15 °. In FIG. 2, the grooves D1 to D6 used for creasing the first six strokes are shown by solid lines, and the grooves D7 to D12 used for creasing the second six strokes are distinguished by broken lines. It is a distinction for the convenience of explaining the order of the steps without changing the shape.

  The turntable 30 repeats rotation and stop at (360 ° / N) = 30 ° by controlling driving of a driving means such as a stepping motor or servomotor (not shown) by a control unit 90 described later. Further, the turntable 30 is intermittently rotated by (360 ° / N) = 30 ° by {(N / 2) −1} = 5 times in the direction F1 in FIG. For example, it rotates only once at (180 ° / N) = 15 ° in the direction F2), and then stops intermittently by rotating only 5 times at 30 ° in the F1 direction. To complete. The next (second sheet) circular filter paper 1 is rotated only once at (180 ° / N) = 15 ° in a returning direction (for example, F3 direction) so that creasing can be started from the groove D1, and then F1 The operation of the first half of the second cycle is reached in which it is intermittently rotated 5 times at 30 ° in the direction (the reverse of F1 in FIG. 2) and stopped.

  One turn fold filter paper 1X is formed into a finished product by performing an operation in which the other support devices are integrated in a cycle in which the turntable 30 operates in one cycle. Furthermore, the automation function is configured so that it can be continuously driven by the number of cycles corresponding to the required number of sheets. In addition, about the drive control for an automation function, operation | movement of this apparatus 100 whole is demonstrated, referring FIG. 4 and other drawings.

  FIG. 3 is an explanatory view showing a procedure for making a crease in the filter sheet material by this apparatus or this method. The circular filter paper 1 is placed on the turntable 30 shown in FIG. 2, and 12 grooves D1 are placed. FIG. 11 is a transition diagram for explaining a procedure for sequentially attaching the fold lines P1 to P12 along the groove D12. In FIG. 3, the turntable 30 drawn in 12 patterns is shown in the transition state in the order indicated by the thick white arrows. That is, if each turntable 30 is compared to a clock face, the upper surface of the circular filter paper 1 placed on the turntable 30 is creased so that a spatula or the like (not shown) is cut vertically from 12 o'clock to 6 o'clock. It will be.

  Specifically, as will be described later with reference to FIG. 4, the roller driving mechanism 40 is inserted into each of the 12 grooves D <b> 1 to D <b> 12 from the upper surface of the circular filter paper 1 placed on the turntable 30 whose rotation is stopped. A crease is created by rolling in the diameter direction while pushing the disk roller 41. With respect to N = 12 grooves D1 to D12 engraved on the surface of the turntable 30 with an angle (360 ° / N) = 30 °, the first half 6 strokes (6 patterns shown in the upper half of FIG. 3) ) And the latter half 6 strokes (6 patterns shown in the lower half of FIG. 3) are divided into a total of 12 strokes, and the disk roller 41 is rolled. As a result, the disk roller 41 rolls through all the grooves D1 to D12 without leakage.

  For this purpose, after the disk roller 41 rolls for one stroke from 12:00 to 6 o'clock, the disk roller 41 is detached from the turntable 30 and the turntable 30 is moved in the direction F1 in FIGS. (360 ° / N) = When the rotation is rotated by 30 ° for a primary stop, rolling of the next stroke is repeated 6 strokes to complete the first half. Here, after the filter paper 1 is rotated and turned over, the turntable 30 is rotated (180 ° / N) = 15 ° in the direction F2 (arbitrary), and then the same six strokes are repeated to complete the second half. . Finally, the turntable 30 is rotated by (180 ° / N) = 15 ° in a direction to return the original position to the initial position and temporarily stopped. Note that in the upper half of FIG.

  The difference in the rotation angle is that when the circular filter paper 1 is rotated in the direction of arrow G in FIG. 3 and turned upside down, the mountain fold L and the valley fold V are continuously attached at an equal angle of 15 °, and 12 The control unit 90 controls the groove D1 to the groove D12 for the purpose of preventing a part of the groove D1 to the groove D12 from being used at an equal number of times. Hereinafter, how the apparatus 100 executes the first half 6 stroke and the second half 6 stroke in one cycle will be described in more detail.

  As shown in the upper left of FIG. 3, when the turntable 30 is temporarily stopped, the disk roller 41 moves in the groove D <b> 1 by performing basic operation of one stroke with respect to the diameter in the direction from 12 o'clock to 6 o'clock. A fold line P1 is formed. The fold line P1 coincides with the fold line P1 of the mountain fold L shown in FIG. Thereafter, the disk roller 41 is detached from the turntable 30. Next, by rotating the turntable 30 by 30 °, the groove D2 is positioned as a diameter in the direction from 12 o'clock to 6 o'clock.

  A fold line P2 along the groove D2 is formed by rolling while pressing the disk roller 41 from the upper surface of the circular filter paper 1 along the groove D2. This series of operations is repeated for the first six strokes until the fold line P6 is formed along the groove D6. The folds P2 to P6 also coincide with the folds P2 to P6 of the mountain fold L shown in FIG.

  At the stage where the groove D6 is positioned as the diameter in the direction from 12 o'clock to 6 o'clock, the circular filter paper 1 is turned halfway in the direction of arrow G about the fold line P6 as shown in the upper right of FIG. When the temporarily stopped turntable 30 on which the inverted circular filter paper 1 is placed is rotated by 15 ° in the F2 direction and temporarily stopped, the state shown in the lower right of FIG. 3 is obtained. Here, the groove D7 is positioned as the diameter in the direction from 12 o'clock to 6 o'clock.

  A fold line P7 along the groove D7 is formed by rolling while pressing the disk roller 41 from the upper surface of the circular filter paper 1 along the groove D7. By repeating this series of operations for the last six strokes, the fold line P12 along the groove D12 is formed. The fold lines P7 to P12 coincide with the fold lines P7 to P12 of the valley fold V shown in FIG.

  At this stage, twelve folds P1 to P12 along the diameter direction with the center angle shifted by 15 ° are formed on the circular filter paper 1, and the state shown in the lower left of FIG. If the folds P1 to P6 are mountain folds L indicated by solid lines when viewed from one surface of the circular filter paper 1, the folds P7 to folds P12 are valley folds V indicated by broken lines.

  FIG. 4 is a schematic explanatory diagram for explaining the outline of the present apparatus. As shown in FIG. 4, the apparatus 100 includes a material standby container 10, a single sheet gripping mechanism 20, a turntable 30, a roller driving mechanism 40, a disk roller 41, a sheet reversing mechanism 50, a temporary folding mechanism 60, and a moving mechanism 70. The final embossing mechanism 80, a control unit 90 that controls these drive parts in a prescribed sequence, and a product storage unit 84 that stores the fold-fold filter paper 1X that is a finished product are configured.

  The material standby container 10 is a container that stabilizes the circular filter paper 1 in a stacked state, for example, in a state where 100 sheets are stacked and stacked. The material standby container 10 is manually loaded with the circular filter paper 1. Although the single sheet gripping mechanism 20 will be described later with reference to FIG. 5, a large number of layers are stacked in the material standby container 10, and the standby filter materials 1 are gripped one by one and moved to the turntable 30.

  The turntable 30 is located at the center of the apparatus 100 and constitutes a lower mold for forming the folds P1 to P12 as described with reference to FIGS. It is driven to rotate and stop at a predetermined angle according to a prescribed sequence.

  The roller driving mechanism 40 drives the disk roller 41 according to a prescribed sequence by the control unit 90. The disk roller 41 has a function corresponding to the upper mold corresponding to the disk roller 41 fitted into the lower mold. The sheet reversing mechanism 50 waits in the retracted state above the turntable 30 for most of the time in one cycle, and starts and turns for a short time after the crease P6 is attached and before the crease P7 is attached. The circular filter paper 1 placed on the table 30 is turned over (arrow G in the upper right of FIG. 3), placed on the turntable 30, and then retracted.

  The sheet turnover mechanism 50 shown in FIG. 4 will be described roughly. Under the control of the control unit 90, the sheet drive mechanism 50 is activated in place of the retraction of the roller drive mechanism 40 and moves to the upper part of the turntable 30, and the fold line P6 of the circular filter paper 1 is moved. Grasp both ends and lift vertically, rotate 180 ° about the fold line P6 (arrow G in the upper right of FIG. 3), then descend vertically and place on the turntable 30.

  Note that filter paper holders 31 composed of a total of four claws (two are shown in FIG. 4) are arranged on the periphery of the turntable 30 so as to be equally distributed by 45 ° central angles. The filter paper holder 31 is controlled by the control unit 90 to open and close at an appropriate timing, thereby fixing or opening the circular filter paper 1 on the turntable 30. Specifically, the filter paper holder 31 releases the circular filter paper 1 and closes it after the circular filter paper 1 placed on the turntable 30 is released and placed on the turntable 30 only while the sheet reversing mechanism 50 grips and turns it over. And fix. During the crease operation by the roller drive mechanism 40, the circular filter paper 1 placed on the turntable 30 is closed to fix it to the filter paper holder 31.

  The circular filter paper 1 with the folds P <b> 1 to P <b> 12 on the turntable 30 is conveyed to the temporary folding mechanism 60 by the moving mechanism 70. The moving mechanism 70 moves and loads the circular filter paper 1 from the turntable 30 to the temporary folding mechanism 60. The moving mechanism 70 sucks and lifts the circular filter paper 1 by the negative pressure applied to the intake port, stops the negative pressure after moving to the target location, and opens the sucked circular filter paper 1.

  The temporary folding mechanism 60 undulates the bellows-like pleats by applying a folding pressure below the breakage limit to the folds P1 to P12 formed on the circular filter paper 1 according to the arrangement of the grooves D1 to D12. In order to limit the breaking stress applied to the circular filter paper 1 to below the breakage limit, the height of the undulating fold is limited to less than half of the final purpose. The final stamping mechanism 80 presses the folds temporarily folded by the temporary folding mechanism 60 with a mold to finish the final desired shape. The product storage unit 84 stores the pleated filter paper 1X that is a finished product.

  The controller 90 accumulates and stores the number K of creases made by the roller drive mechanism 40, and retracts the disk roller 41 when the number K = (N / 2) = 6 defined in the first half of the process is reached. In the meantime, the sheet reversing mechanism 50 is driven, and after the crease operation is performed by the number of times K = (N / 2) = 6 specified in the latter half of the process, the circular filter paper 1 is moved by the moving mechanism 70. To control.

  FIG. 5 is a schematic front view of the single sheet gripping mechanism of the apparatus. As described above, a large number of stacked circular filter papers 1 in the material standby container 10 are held one by one and moved to the turntable 30. At this time, the vicinity of the center of the circular filter paper 1 that is stacked and waiting in a plan view is sucked by the negative pressure applied to the suction port 21 and then lifted, and after moving, the negative pressure is stopped and sucked. The attached circular filter paper 1 is opened. Here, as a separation mechanism for securely holding the circular filter paper 1 one by one, a peripheral pressing member 22 that presses the periphery of the circular filter paper 1 with an appropriate frictional force is arranged inside the peripheral edge of the circular filter paper 1. It is installed.

  FIG. 6 is a schematic front view, (B) top view of the upper die, and (C) plan view of the saucer corresponding to the lower die, for explaining the temporary folding mechanism and the final die pressing mechanism of the apparatus. is there. Hereinafter, the configuration and operation of the temporary folding mechanism 60 and the final die pressing mechanism 80 will be described together. As shown in FIG. 6 (A), the temporary folding mechanism 60 and the final embossing mechanism 80 are configured such that each member performs an ascending / descending operation and a derivative operation thereof along a vertical axis Z located at the center. As shown in FIG. 6 (B), the final die pressing mechanism 80 is formed with an upper die 81 for finishing the circular filter paper 1 by pressing the bellows-like folds to the final desired shape. That is, if the circular filter paper 1 is formed in close contact with the upper mold 81 without a gap, the final finished product is obtained.

  However, if the flat filter paper 1 is suddenly pushed with the upper die 81 to finish to the final target shape, the circular filter paper 1 is broken by an excessive deformation stress exceeding the strength. Therefore, as described above, the apparatus 100 undulates the bellows-like folds little by little in three steps with respect to the planar circular filter paper 1.

  First, in the first stage, the turntable 30 and the roller driving mechanism 40 crease the mountain fold L and the valley fold V. Next, in the second stage, the circular filter paper 1 creased in the mountain fold L and the valley fold V is caused to undulate into a bellows-like fold to a target half height by the temporary folding mechanism 60. In the third stage, the final mold pushing mechanism 80 pushes the folds temporarily folded by the temporary folding mechanism 60 with the upper mold 81 to finish the final desired shape.

  As shown in FIG. 6C, the circular filter paper 1 creased in the mountain fold L and the valley fold V after the first stage has passed within the circular range in plan view is moved by the moving mechanism 70 and loaded. A receiving tray 82 is formed. The tray 82 is configured by extending twelve mountain fold bones 83 that are equally distributed at the central angle from the peripheral portion toward the center and simultaneously move up and down. More specifically, twelve shafts 85 are disposed in the circumferential direction of the peripheral portion, and twelve mountain fractured bones 83 are pivotally supported on each of the shafts 85.

  In FIG. 6A, twelve mountain folded bones 83 are urged by a spring (not shown) and are shown in a state of mountain folded bone 83a maintained near the horizontal, and downward against the elastic force of the spring. It is drawn separately from the state shown in the pushed mountain fold 83b. Twelve mountain folds L are configured to be locked to twelve mountain folds 83a that are closed in a state where they are lowered from the periphery toward the center with a gentler slope than the horizontal. Twelve blades 62 of the moving body 61 of the temporary folding mechanism 60 are configured to be engaged with the valley fold V of the circular filter paper 1 and pushed down.

  In the second stage, the mountain fold bone 83a maintained close to the horizontal is locked to the mountain fold L and supported upward from the bottom of the inverted conical shape, while being locked to the valley fold V and 12 temporary positions. The moving body 61 of the folding mechanism 60 is pressed in the direction of pressing down. In order to limit the breaking stress applied to the circular filter paper 1 below the breakage limit in accordance with the arrangement of the grooves D1 to D12, the height of the undulating folds is controlled to be less than half of the final purpose.

  Therefore, the bellows-like pleats can be raised and lowered without difficulty up to about half the height of the target. In the second stage and the third stage described above, the temporary folding mechanism 60 and the final embossing mechanism 80 are sequentially activated at substantially the same position without horizontally moving the circular filter paper 1 to obtain the final target shape. Finish. Even in the third stage, the die pressing is performed with the increased or decreased pressing force, so that the finally formed fold-fold filter paper 1X is very rarely broken.

  FIG. 7 is a flowchart for explaining the procedure of this method. As shown in FIG. 7, the present method includes a filtering material placing step S10, a first crease step S20, a sheet reversing step S30, a second crease step S40, an embossing preparation step S50, and temporary folding. A process S60 and a final stamping process S70 are provided.

  Before operating this apparatus 100, for example, about 100 circular filter papers 1 are loaded in a stately stacked state on the material standby container 10 by human hands, and are kept waiting for supply. In other words, the user or administrator of the copier is a procedure for loading copy sheets into the sheet cassette in units of 1000 sheets. Hereinafter, the operating state of the apparatus 100 will be described.

  First, in the filtering material placing step (S10), the circular filter paper 1 that is waiting in a large number in the material waiting container 10 is held on the turntable 30 by the single sheet grasping mechanism 20 one by one. Let me put it.

  In this turntable 30, N = 12 grooves D1 to D12 are engraved along the respective diameters intersecting by a central angle of (180 ° / N) = 15 °. With this sequence control, basically, every time one stroke of creasing operation is performed, the rotation and stop of (360 ° / N) = 30 ° are repeated.

  In the first crease process (S20), the roller drive mechanism 40 applies the filtering material 1 to the grooves D1 to D12 one by one from the outer periphery of the disk roller 41 from above N = 12 grooves D1 to D12. A series of operations of rotating and stopping the turntable 30 by (360 ° / N) = 30 ° following the operation of creasing by rolling each time the roller rolls in the diametrical direction while being pushed is performed in the first half process. The specified number of times of six strokes K = (N / 2) = 6 times.

  In the sheet reversing step (S30), when the number of rolling times K = (N / 2) = 6 times is reached, the disk roller 41 is retracted for a predetermined time and returned, and then the disk roller 41 is moved by the sheet reversing mechanism 50. The circular filter paper 1 on the turntable 30 is rotated (180 ° / N) = 15 ° in the rotation direction F2 of the turntable 30 within a predetermined time during retraction and then turned over.

  After the sheet reversing step (S30), the second crease step (S40) further performs the crease operation by rolling for the number of times of six strokes defined in the latter half step K = (N / 2) = Run only 6 times. Note that if the twelve folds P1 to P12 are made at a time, the circular filter paper 1 is damaged due to strong tensile / breaking stress.

  Next, in the embossing preparation step (S50), the circular filter paper 1 with N = 12 folds P1 to P12 is moved from the turntable 30 to the temporary folding mechanism 60 by the moving mechanism 70 and loaded. . In the temporary folding step (S60), the temporary folding mechanism (60) applies a folding pressure equal to or less than the breakage limit to the N = 12 folds P1 to Pfold P12 applied to the circular filter paper 1 in accordance with the arrangement of the grooves D1 to D12. In addition, it undulates in a bellows shape.

  In the final mold pressing step (S70), the final mold pressing mechanism 80 finishes by pressing the bellows-like folds temporarily folded by the temporary folding mechanism 60 against the tray 82 with the upper mold 81. The product completed by the fold folding is dropped and accumulated in a product accommodating portion 84 disposed at the lower part of the final stamping mechanism 80.

  For example, in the case of a yield of 100%, 100 fold-fold filter papers 1X produced at a rate of one per 20 seconds by the apparatus 100 are produced in about 34 minutes. Therefore, at such intervals, the production manager supplies 100 circular filter papers 1 of materials, and 100 products are taken out one by one to proceed to the inspection process and the packing / shipping process (not shown).

  As described above, according to the fold-folding device and the fold-folding method for a filtration sheet material according to the present invention, the fold-folding process is completed without touching the sheet-like filtration material as much as possible. It is easy to avoid problems such as adhesion of contaminants and contaminants from human hands, problems of breaking the filtration material during the fold-folding process, and problems of lack of shape identity that guarantee high and uniform filtration performance. The process of folding and forming the filter material can be completed efficiently in a short time and fully automatically.

[Modified Example 1]
Hereinafter, a fold-folding device (the present device 200) for a filtration sheet material according to a modified embodiment of the present invention will be described with reference to other drawings including FIG. This apparatus 200 is intended to further simplify the crease means (30, 40) in the basic embodiment and still obtain the same effect. That is, the apparatus 200 does not require the roller driving mechanism 40, the disk roller 41, and the sheet turnover mechanism 50. That is, the apparatus 200 further simplifies the first crease process (S20), the sheet turnover process (S30), and the second crease process (S40) executed by the turntable 30 and the roller drive mechanism 40. It is a device that can be completed in the process.

  FIG. 8 is an explanatory view showing a procedure for making a crease in the filter sheet material according to a modified embodiment of the present apparatus. As shown in the upper right of FIG. 8, the circular filter paper 1 at the stage of being creased is held at its peripheral edge by the holding and fixing means 2 and does not need to be rotated or turned over. The apparatus 200 includes an upper mold 3 and a lower mold 4 that can be face-to-face fitted with the circular filter paper 1 from both sides as the folding means 3 and 4. At least one of the upper mold 3 and the lower mold 4 can be rotated relative to the circular filter paper 1 that is face-to-face fitted intermittently.

  The upper mold 3 and the lower mold 4 are formed with irregularities that allow the folds P1, P4, P7, and P10 shown in the lower left of FIG. 8 to be attached by one press. That is, in order to create the folds P1, P4 of the mountain fold L and the folds P7, P10 of the valley fold V in the upper mold 3, grooves and ridges are formed at positions corresponding to them. In other words, the upper mold 3 and the lower mold 4 have N fold lines P1 to P1, P4, P7, P10 or all of the fold lines P1 to P12 in a circle that can hold the supplied circular filter paper 1. It has grooves and ridges corresponding to P1 to P12. The upper mold 3 and the lower mold 4 complete the crease press by dividing the protrusions into the grooves in a plurality of times with intermittent rotation.

  By the first press, the circular filter paper 1 is sandwiched between the grooves of the upper mold 3 and the ridges of the lower mold 4 and is provided with four fold lines P1, P4, P7, and P10. In the second press, the upper mold 3 and the lower mold 4 are rotated 30 ° clockwise with respect to the vertical axis with respect to the first press position, and then four folds P3 and P6 are formed on the circular filter paper 1. , P8, and P11. In the third press, the upper mold 3 and the lower mold 4 are rotated clockwise by 60 ° with respect to the vertical axis with respect to the first press position, and then four folds P2, P5 are formed on the circular filter paper 1. , P9, and P12 are added, resulting in the state shown in the lower right of FIG. Note that if the twelve folds P1 to P12 are to be attached with a single press, the circular filter paper 1 is damaged by a strong tensile / breaking stress, and therefore the press is performed in three steps.

  The state shown in the lower right of FIG. 8 is the same as the state shown in the lower left of FIG. 3, and is a state in which the fold lines P1 to P12 have been added to the circular filter paper 1. In this state, fold lines P1 to P6 indicated by solid lines are mountain folds L, and fold lines P7 to fold lines P12 indicated by broken lines are valley folds V. As described above, the circular filter paper 1 in the state where the folds P1 to P12 have been applied is produced in the same half-folded filter paper 1X by the last half of the basic embodiment shown in S50 to S70 of FIG.

[Modified Example 2]
Hereinafter, a filter sheet material fold-folding device (substitute with the present device 200 in FIG. 8) according to Modified Example 2 in which the mechanism of Modified Example 1 is further simplified will be described. The apparatus 200 according to the modified example 2 rotates the upper mold 3 of the modified example 1 with respect to the vertical axis, while fixing the lower mold and placing it on the fixed lower mold. It is also possible to attach folds P1 to folds P12 to the circular filter paper 1 with the circular filter paper 1 fixed.

  However, in that case, the lower mold 4 of the modified example 1 is formed with unevenness enough to make the folds P1, P4, P7, P10 by the first press shown in the lower left of FIG. It is necessary to replace it with a fixed lower mold (not shown) in which irregularities are formed so as to be doubled and attached to the 12 fold lines P1 to P12. This fixed lower mold is produced by replacing the grooves D7 to D12 of the turntable 30 in FIG. 2 with ridges.

  Along with the fixed lower mold, the circular filter paper 1 placed thereon is also pressed for the first time in an initial state, and the upper mold 3 of the modified example 1 is placed on the vertical axis from the circular filter paper 1. Rotate 30 ° clockwise and press for the second time, rotate 60 ° from the initial state and press for the third time, and crease P1 to crease P12. Thereafter, similar to the modified embodiment 2, the same fold-fold filter paper 1X is produced by the last half steps of the basic embodiment shown in S50 to S70 of FIG.

  According to the fold-folding device or the fold-folding method of the filtration sheet material according to the present invention, in addition to the advantage that bacteria and pollutants are difficult to adhere to the filtration sheet material from human hands, it is highly sophisticated on the basis of shape identity. In addition, it is possible to efficiently mass-produce filter sheet materials with uniform filtration performance. Therefore, the filter paper produced by this device or this method is used for inspections in the fields of food-related analysis and environmental analysis conducted at 135 food hygiene law registered inspection organizations and 1722 measurement certification establishments operating throughout Japan. There is a possibility of being adopted as a permanent consumable used in equipment.

1 circular filter paper (filter sheet material), 1X fold filter paper (finished product), 2 gripping and fixing means, 3 upper mold, 4 lower mold, 10 material standby container, 20 single sheet gripping mechanism, 30 turntable, 31 Filter paper holder, 40 roller drive mechanism, 41 disc roller, 50 sheet reversing mechanism, 60 temporary folding mechanism, 61 moving body, 70 moving mechanism, 80 final pressing mechanism, 81 upper mold, 82 saucer, 83 mountain folded bone, 84 products Storage unit, 85 shaft, 90 control unit, 100, 200 Filtration sheet material fold folding device, D1-D12 groove, F1, F2, F3 (turntable 30) rotation direction, G sheet reverse direction, K (roller drive mechanism) 40, the number of times of crease, L mountain fold, V valley fold, P1-P12 crease, Z vertical axis, S10 filtration material placing step, S20 1st creasing process, S30 sheet turning over process, S40 2nd creasing process, S50 stamping preparation process, S60 temporary folding process, S70 final stamping process, Z vertical axis

Claims (5)

A filtration sheet material fold-folding device that continuously forms folds based on N folds alternately with mountain folds and valley folds along a crossing diameter so as to form a bellows-like conical surface by a circular sheet-like filter material There,
Crease means for creasing the N folds along each of the diameters intersecting the filtration material by a central angle of (180 ° / N);
A temporary folding mechanism that undulates the bellows-like fold by applying a folding pressure below the breakage limit to the fold formed in the filtration material;
A final stamping mechanism for finishing the folds temporarily folded by the temporary folding mechanism by pressing the folds against a tray with an upper mold;
A fold-folding device for a filter sheet material, comprising: As the creasing means,
There are N grooves engraved along each diameter intersecting with a central angle of (180 ° / N) in a circle on which one of the supplied filtration materials can be placed (360 ° / N N) a turntable that repeats rotation and stop,
By rolling the disc roller from the upper surface of the filtration material placed on the turntable while the rotation is stopped while pushing each one of the N grooves into the filtration material, the filtration material is adjusted to the arrangement of the grooves. A roller driving mechanism for making a crease;
A sheet reversing mechanism that drives the filter material on the turntable to turn over after rotating the filter material on the turntable (180 ° / N) while the disk roller is retracted;
When the first half of the process of folding the filter material on one surface of the filter material is completed, the sheet turnover mechanism is driven to turn the filter material upside down on the turntable. A control unit that executes the latter half of the process of creasing the surface;
The fold-folding device for a filter sheet material according to claim 1, further comprising: A material standby container for laminating a large number of filtration materials and waiting;
A single sheet gripping mechanism for gripping the filtration materials waiting in the material standby container one by one and placing them on the turntable;
A moving mechanism for moving and loading the filtration material from the turntable to the temporary folding mechanism,
The controller accumulates and stores the number K of creases by the roller driving mechanism, and when the number K = (N / 2) defined in the first half of the process is reached, the disk roller is retracted. And driving the sheet reversing mechanism and performing the creasing operation for the number of times K = (N / 2) defined in the latter half of the process, and then controlling the moving material to move the filtering material. The fold-folding device for a filtration sheet material according to claim 2. As the creasing means,
There are grooves and ridges corresponding to part or all of the N folds in a circle capable of sandwiching one of the supplied filtration materials, and face-to-face fitting with the filtration material sandwiched from both sides It has an upper mold and a lower mold,
At least one of the upper mold and the lower mold is rotatable relative to the filtering material that is face-to-face fitted, and intermittently,
2. The fold folding of the filter sheet material according to claim 1, wherein the crease press is completed by fitting the ridges into the groove face-to-face in a plurality of times with the intermittent rotation. apparatus. A fold-folding method for continuously forming folds based on N folds formed alternately with mountain folds and valley folds along a crossing diameter so as to form a bellows-like conical surface by a circular sheet-like filter material. And
A creasing step of creasing the N folds along each of the diameters intersecting the filtration material with a central angle of (180 ° / N);
A temporary folding step of undulating the bellows by applying a folding pressure equal to or less than a breakage limit to the fold formed in the filtration material in the crease step;
A final embossing step in which the bellows-like folds temporarily folded in the temporary folding step are finished by pressing the upper die against a tray with an upper die;
A fold-folding method characterized by comprising:

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