JP4170720B2 - Veneer veneer cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting device used for cutting a veneer veneer (hereinafter simply referred to as a veneer).
[0002]
[Prior art]
The applicant of the present application previously described, for example, the principle technology in “a method for cutting a single plate” (Japanese Patent Publication No. 59-23241), and “a cutting device for a single plate” (Japanese Patent Publication No. 54-6111), “a single plate” As disclosed in Japanese Patent Publication No. 58-54005, a pair of single-plate conveying bodies that rotate symmetrically, and a cutting edge directed in the direction opposite to the conveying direction of the single plate is disclosed It is mainly composed of a reciprocating cutting blade that alternately abuts on the outlet side peripheral surface of a pair of single plate conveyance bodies, and it is possible to cut the single plate using the conveyance force of the single plate Developed and proposed a cutting device.
[0003]
According to the cutting apparatus disclosed in each of the above publications, not only the advantage that cutting can be performed without stopping the conveyance of the single plate, but also the preceding single plate and the subsequent single plate, with the cutting point by the cutting blade as a boundary. It has the advantage that it can be discriminated reliably, so it is convenient for excision of unnecessary parts of a veneer or continuous cutting of a veneer veneer, and it has excellent practicality. Since the structure that ensures the cutting of the single plate by bringing it into contact with the outlet side peripheral surface of the carrier, at least one of the cutting edge of the cutting blade or the peripheral surface of the single plate carrier is simply a single plate. There is a tendency to wear excessively as compared with the case where only contact is made with the material, and there is a problem that the cost required for maintenance and management of the members is increased.
[0004]
Therefore, the applicant of the present application further discloses an arbitrary one in the axial direction as disclosed in, for example, “Single-plate cutting device” (Patent Publication No. 2691592), “Single-plate cutting device” (Patent Publication No. 2750528), and the like. A pair of (or at least one) single-plate transport body (or piercing transport body) having a plurality of grooves continuous in the rotational direction at intervals and rotated in a required direction via a drive mechanism, and a cutting edge A cutting blade fixedly provided on the lower side of the single plate conveying direction of the single plate conveying body in a direction opposite to the conveying direction of the single plate, and respective tip portions extending to the vicinity of the cutting edge of the cutting blade A pair of single plate guide members pivotally supported at their respective base ends so as to reciprocally swing between positions where the single plate is alternately guided to one surface side and the other surface side of the cutting blade; In response to a single plate cutting signal, the pair of single plate guide members swing back and forth alternately each time. It constitutes a mechanism mainly, while avoiding contact of the cutting blade and the veneer carrier, developed and proposed a cutting apparatus adapted to reliably cut the veneer.
[0005]
According to such a cutting device, like the above-described cutting device, it is possible to cut so as to reliably discriminate between the preceding single plate and the subsequent single plate without stopping the conveyance of the single plate. In addition, unlike the above-described cutting device, the veneer carrier (or piercing carrier) and the cutting blade do not come into contact with each other at all, so that any member may be worn excessively. Was able to be resolved.
[0006]
[Problems to be solved by the invention]
However, in the case of adopting a configuration in which a pair of single plate guide members are alternately reciprocally swung to cut a single plate, as is apparent from the description of the drawings of each of the above patent publications, at least one single plate is used. For the guide member, the base end is positioned outside the veneer transport body (or puncture transport body) and pivotally supported, and through the groove formed in the single plate transport body (or puncture transport body), Since it is necessary to extend the tip part to the vicinity of the cutting edge of the cutting blade, the size of the single plate guide member itself is larger than the reciprocating cutting blade, and one cutting blade is required. On the other hand, since the single plate guide member is a pair, the overall inertia of the single plate guide member is greatly increased, compared with the case where the reciprocating cutting blade is rotated each time. Because it tends to lack responsiveness (immediate response) at the time of cutting, There has been a weakness is somewhat unsuitable.
[0007]
[Means for Solving the Problems]
The present invention was developed in order to eliminate the disadvantages and weaknesses of these known cutting devices. Specifically, each of the known cutting devices is formed in a double row with an arbitrary interval in the axial direction around the periphery. A pair of stabs for transporting a single plate, which has a large number of stabs that are worn on a single plate, are provided opposite to each other so that the stabs are aligned in the same row, and are rotated symmetrically via a drive mechanism. There are a plurality of narrow grooves that allow the insertion of the piercing bodies at positions corresponding to the rows of the piercing bodies of the landing conveying member and the piercing bodies of the piercing and conveying member in the vicinity of the cutting edge including the cutting edge. The cutting edge directed in the direction opposite to the plate conveying direction is provided so as to be reciprocally rotatable so as to alternately enter inward by a desired depth from the rotation trajectory of the tip of the piercing body on the outlet side of each puncture conveying member. A cutting blade and an operating mechanism for alternately rotating the cutting blade back and forth in response to a single plate cutting signal. The single plate cutting device according to claim 1 (Claim 1) and the portion constituting the bottom of the plurality of narrow grooves in the cutting blade are formed in a blade shape. Separation of the veneer from the piercing body at the lower side of the veneer conveyance direction from the cutting blade intervention position between the cutting device (claim 2) and each row of piercing bodies of each piercing and conveying member 3. A veneer cutting device (Claim 3), wherein a veneer peeling member is provided to promote the movement, and between each row of piercing bodies of each piercing and conveying member. 2. A single plate guide member that guides the single plate in the principal transfer direction of the puncture transfer member in a portion closer to the single plate transfer direction than the rotation trajectory of the cutting edge of the cutting blade. Alternatively, a single-plate cutting device according to claim 2 or claim 3 (claim 4) is proposed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in further detail with an example of the embodiment illustrated in the drawings. FIG. 1 is a schematic side view of a single plate cutting apparatus according to the present invention, and FIG. 2 is a single plate illustrated in FIG. FIG. 3 is a partial plan explanatory view of a cutting blade and a blade holding member used in the cutting apparatus of FIG. 3, FIG. 3 is a cross-sectional explanatory view taken along line HH of FIG. 2, and FIG. It is operation | movement explanatory drawing of the cut | disconnecting device of the single plate which was made. In the figure, 1 and 2 each have a large number of piercing bodies 1a and 2a that are worn in a single row in a double row with an arbitrary interval in the axial direction around the periphery, and each of the piercing bodies 1a. A pair of piercing and conveying members that are provided opposite to each other so that 2a are aligned in the same row and are rotated symmetrically in the direction of the arrow in the figure via an appropriate drive mechanism (not shown) such as a motor with a speed reducer. Then, the single plate T carried in the direction perpendicular to the fiber direction is stuck via the carry-in conveyor 3 and, in principle, is continuously conveyed in the tangential direction of the proximity position of both the stuck conveying members 1 and 2.
[0009]
Reference numeral 4 denotes a plurality of fine lines that allow intervention of the piercing bodies 1a and 2a at positions corresponding to the rows of the piercing bodies 1a and 2a of the piercing and conveying members 1 and 2 in the vicinity of the cutting edge including the cutting edge 4a. A cutting blade having a groove 4b, as shown by a solid line and a dotted line in FIG. 1, a cutting edge 4a directed in the direction opposite to the veneer conveying direction is a piercing body on the outlet side of each of the piercing and conveying members 1 and 2 It is provided so as to be able to reciprocally rotate through the blade holding member 5 so as to alternately enter the inner side by a desired depth from the rotation trajectories 1b and 2b of the tip, and the operation of the operation mechanism 6 described later is obtained and indicated by a solid line The single plate T is cut obliquely each time the position and the position indicated by the dotted line are alternately reciprocated.
[0010]
6 is an operating mechanism comprising a fluid cylinder, a cam, etc., and in response to a single plate cutting signal based on the control of a control mechanism 10 described later, the cutting blade 4 is moved by a solid line each time via the blade holding member 5. The reciprocating rotation is alternately performed to the indicated position and the position indicated by the dotted line.
[0011]
7 is composed of a plurality of limit switches, reflection type phototubes, etc., and is opened above the carry-in conveyor 3 so as to open and close in response to the swing of the swing rod 8 provided with the roller 8a. All of the plurality of contacts 7a which are disposed single plate detectors and are closed (ON) in a normal state (no single plate) are opened (OFF) when the single plate T is loaded. ), The passage of the unnecessary portion Ta on the front end side is detected, and when any one of the contacts 7a is closed (ON) with the completion of the loading of the single plate T, the rear end side Is detected, and a detection signal is transmitted to the control mechanism 10 described later.
[0012]
9 and 9a are single plate peeling members having a plurality of individually separated spatula shapes or a shape similar to the shape of the cutting blade 4 (a wide spatula shape having a plurality of narrow grooves allowing the insertion of a piercing body). Each of the piercing bodies 1a and 2a of the piercing and conveying member is provided on the lower side in the veneer conveying direction from the intervention position of the cutting blade 4 between the rows of the piercing bodies 1a and 2a. The separation of the effective part of the single plate T from 1a facilitates the separation of the unnecessary portion Ta on the front end side of the single plate from the piercing body 2a.
[0013]
10 is a control mechanism, and based on the detection signal from each single plate detector 7, the boundary between the effective portion of the single plate T and the unnecessary portion Ta on the front end side reaches the position of the cutting edge 4a of the cutting blade. The cutting blade 4 is rotated from the position indicated by the solid line to the position indicated by the dotted line through the operation mechanism 6 and the blade holding member 5 in accordance with the timing to perform, and the effective portion and the rear end side of the single plate T The operating mechanism 6 and the blade holding member 5 are moved from the position indicated by the dotted line to the position indicated by the solid line by adapting to the time when the boundary with the unnecessary portion Tb reaches the position of the cutting edge 4a of the cutting blade. Rotate through.
[0014]
11 is a conveyor, and a pulley 11a on the upper side in the veneer conveying direction is mounted on the shaft portion 5a of the blade holding member 5 so as to freely rotate, and a pulley and a speed reducer on the lower side in the veneer conveying direction. It is caused to travel in the direction indicated by the arrow through an appropriate drive mechanism (not shown) including an attached electric motor, and the effective portion of the single plate T is continuously conveyed in the direction indicated by the arrow.
[0015]
The single-plate cutting device according to the present invention is configured as described above, for example. The actual cutting operation will be described in detail in order. The control mechanism 10 initially sets the cutting blade 4 to the solid line in FIG. However, as the veneer T is carried in via the carry-in conveyor 3, all the contacts 7a of the veneer detector 7 that has been normally closed are opened, and the front end When the detection signal for the unnecessary portion Ta on the side is issued, based on the detection signal from the single plate detector 7, the boundary between the effective portion of the single plate T and the unnecessary portion Ta on the front end side is the cutting edge 4a of the cutting blade. Since the cutting blade 4 is rotated from the position indicated by the solid line to the position indicated by the dotted line in accordance with the time to reach the position, the unnecessary portion Ta on the front end side is cut from the single plate T as illustrated in FIG. Separated to the lower side of the cutting blade 4, and the effective portion of the single plate T is above the cutting blade 4. They are respectively transferred to.
[0016]
Next, when the loading of the single plate T is completed, the contact 7a of any one single plate detector 7 is closed, and when the detection signal of the unnecessary portion Tb on the rear end side is generated, the single plate detector 7 The cutting blade 4 is adapted to the timing when the boundary between the effective portion of the veneer T and the unnecessary portion Ta on the rear end side reaches the position of the cutting edge 4a based on the detection signal from FIG. Since it is rotated from the position indicated by the dotted line (the position indicated by the solid line in FIG. 4) to the position indicated by the solid line in FIG. 1, the unnecessary portion Tb on the rear end side is cut from the single plate T as illustrated in FIG. After being separated, the effective portion of the single plate T is continuously transferred to the lower side of the cutting blade 4 and to the upper side of the cutting blade 4.
[0017]
Thereafter, unnecessary portions before and after the veneer can be sequentially cut by repeating the same operation. Even if there is an unnecessary part such as a large node hole in the middle part of the single plate, if the contact of any one single plate detector is closed with the entry of the unnecessary part of the intermediate part, Based on the detection signal from the single plate detector, the control mechanism is adapted to cut when the boundary between the front side of the unnecessary portion of the intermediate portion and the effective portion of the single plate reaches the position of the cutting edge of the cutting blade. When the blade is rotated from the position shown by the dotted line in FIG. 1 to the position shown by the solid line in FIG. 1 and the contacts of all the single-plate detectors are opened along with the passage of the unnecessary part of the intermediate part, Based on the detection signal from the single plate detector, the control mechanism is adapted to the time when the boundary between the rear side of the unnecessary portion of the intermediate portion and the effective portion of the single plate reaches the position of the cutting edge of the cutting blade, Since the cutting blade is rotated from the position indicated by the solid line in FIG. 1 to the position indicated by the dotted line in FIG. It can be excised by similar operation,
[0018]
In addition, since the portion of the narrow groove formed on the cutting blade does not have a blade edge, it cannot perform the same smooth cutting as the portion with the blade edge. There is a characteristic that there is an extreme difference in strength between the fiber direction and the direction perpendicular to the fiber direction, and since it is extremely soft in the direction perpendicular to the fiber direction, there is a blade edge even if there is no blade edge in the narrow groove part Since it can be forcibly divided along with the cutting of the portion, there is no particular problem in practical use. However, the groove width should not be excessively wide and is not shown. However, in an experiment using a cutting blade in which the bottom portion of the narrow groove is formed into an ordinary flat bottom, the groove width should be 10 mm or less. It is preferably 7 mm or less, more preferably 5 mm or less. In addition, as illustrated in FIG. 3, it is also effective to form the portion 4c constituting the bottom of the narrow groove in a blade shape as necessary, and to ensure a reliable division.
[0019]
In addition, along with the cutting process, the veneer (including unnecessary portions) that is punctured and conveyed by the piercing body of the puncture conveying member is in a direction different from the basic conveying direction, that is, When transported in a direction different from the tangential direction of the proximity position (for example, the circumferential direction of any of the puncturing and conveying members), a centrifugal force inevitably acts on the veneer, and the centrifugal force is generated from the piercing body. This facilitates the separation of the veneer, so that when the cutting process is performed at a relatively high speed, the veneer tends to detach naturally from the piercing body. In order to achieve this, as illustrated in the above-described embodiment, the veneer peeling member is disposed on the lower side of the veneer conveyance direction with respect to the cutting blade intervention position between the rows of the piercing bodies of the piercing conveyance members. It is appropriate to dispose, and as a specific form of the veneer peeling member, the detachment of the veneer from the piercing body is important. If the kill form sufficient.
[0020]
Of course, the mode of the cutting device for a single plate according to the present invention is not limited to the mode of the above-described embodiment, and various improvements and modifications may be made. 5, in addition to the configuration of the embodiment illustrated in FIGS. 1 to 3, the embodiment illustrated in FIG. 5 is cut between the rows of the piercing bodies 1 a and 2 a of the piercing conveyance members 1 and 2. A veneer guide member 12 for guiding the veneer T in the principle conveyance direction of the puncture conveyance members 1 and 2 is disposed on the upper side of the rotation trajectory 4d of the blade edge 4a. The specific configuration of the single plate guide member may be a plurality of individually separated prisms or a grooved flat plate having a plurality of narrow grooves that allow intervention of a piercing body. Even if it exists, the point which can guide a veneer in a desired direction is sufficient.
[0021]
According to the cutting device having the above-described configuration, when cutting a single plate, the single plate guide member functions as a knife with respect to a knife (cutting blade), which is effective because more accurate cutting can be performed. In particular, it is effective when used for cutting processing of a relatively thin veneer. This is a practically superior configuration such that it can be enlarged as compared with the case where a single plate guide member is not provided.
[0022]
The embodiment illustrated in FIG. 6 is an example in which the single-plate cutting device according to the present invention is applied to single-plate standard cutting. In FIG. It has a large number of piercing bodies 13a, 14a for single-plate stabs in double rows spaced at an arbitrary interval in the core direction, and each piercing body 13a, 14a is provided in an opposing manner so that they are aligned in the same row. The piercing bodies 13a and 14a are a pair of piercing and conveying members that are rotated via an appropriate drive mechanism (not shown) so that the tips of the piercing bodies 13a and 14a rotate symmetrically in the direction of the arrows in the drawing along the rotation trajectories 13b and 14b. Then, the single plate T carried in the direction perpendicular to the fiber direction is stuck via the carry-in conveyor 3 and, in principle, is continuously conveyed in the tangential direction of the proximity position of the both-punctured conveying members 13 and 14.
[0023]
Reference numeral 15 denotes another transport conveyor disposed below the transport conveyor 11, and similarly to the transport conveyor 11, an appropriate drive mechanism including a pulley on the lower side in the single-plate transport direction, an electric motor with a speed reducer, etc. Is also moved in the direction of the arrow shown in the figure, and the effective portion of the single plate T is continuously conveyed in the direction of the arrow.
[0024]
Reference numerals 16 and 17 are fixed-length detectors composed of reflective phototubes, limit switches, and the like disposed above the conveyors 11 and 15, and the leading ends of the single plates T conveyed through the conveyors 11 and 15. However, every time it reaches the position of each of the standard detectors 16 and 17, a detection signal is transmitted to the control mechanism 18 described later.
[0025]
18 is a control mechanism, and based on detection signals from the single plate detectors 16 and 17, the tips of the single plates T conveyed through the conveyers 11 and 15 are connected to the standard detectors 16. Each time the position 17 is reached, the cutting blade 4 is alternately rotated to the position indicated by the dotted line and the position indicated by the solid line via the operation mechanism 6 and the blade holding member 5.
[0026]
According to such a configuration, each time the tip of the single plate T conveyed through the conveyors 11 and 15 reaches the position of each of the standard detectors 16 and 17, the control mechanism 18 Since the cutting blade 4 is alternately rotated to the position indicated by the dotted line and the position indicated by the solid line via the blade holding member 5, the continuous strip-shaped single plate is sequentially cut at a predetermined scale. Can do.
[0027]
Incidentally, a single plate guide member having the same function as that of the single plate guide member provided in the cutting apparatus illustrated in FIG. 5 (a specific form is adapted to the form of the piercing and conveying members 13 and 14) is shown in FIG. If it is also provided in the cutting device illustrated in (1), it is similarly effective, or illustration is omitted, but if necessary, to the lower side in the conveying direction of the cutting device illustrated in FIGS. If the cutting apparatus illustrated in FIG. 6 is provided and the conveyors 11 and 15 are adapted to carry in a single plate and rotate intermittently each time, the short length (small width) that does not meet the required standard is obtained. The unnecessary parts of the veneer are cut off sequentially, and the gap between the veneers that have been cut off the unnecessary parts is closely approached, and each time the accumulated length reaches the required standard, the standard cut is performed. It can also be applied to the usage of sequentially forming a single plate group.
[0028]
Next, the mode of the individual members will be described. First, as for the opposing relationship of the puncturing and conveying members, it suffices if the opposing position where the single plate can be punctured and conveyed is sufficient, for example, as shown in the illustrated embodiment, If it is arranged so that the piercing bodies do not collide with each other by, for example, changing the positions of the piercing bodies, it may be provided as close as possible to a position where the rotational trajectories of the piercing body tips slightly overlap. This is possible, and the sticking by the piercing body tends to be stabilized, so that it is effective for sticking and transporting a relatively thin single plate.
[0029]
As for the form of the piercing body provided in the piercing and conveying member, a wedge shape as illustrated in the above embodiments is relatively easy to form and is convenient for piercing and conveying a single plate. In addition, there is no limitation, for example, a conical shape, a needle shape, a pyramid shape, a stone ax shape, etc., and the design can be appropriately changed. In addition to the form provided integrally with the part, for example, a piercing body is provided in an annular shape on the outer periphery of the perforated disk, and a circular saw-like piercing member is formed in advance, and the circular saw-like piercing member is pierced and conveyed. There is no problem even if it is provided in such a way that it is fitted to the shaft portion of the member and firmly fixed with a key, a fastening screw or the like.
[0030]
Also, there is no particular restriction on the spacing of the piercing bodies and the spacing of the rows of piercing bodies. In short, it is sufficient if the spacing can always stably puncture and transport the veneer, including when cutting, but it should be mentioned. For example, the interval between the piercing bodies is about 2 to 5 times the thickness of the single plate, and the interval between the rows of the piercing bodies is about 10 to 30 times the thickness of the single plate. is there.
[0031]
On the other hand, with respect to the depth when the cutting edge of the cutting blade is made to enter the inside of the rotation trajectory of the tip of the piercing body, it is preferable to make the depth more than the thickness of the single plate from the viewpoint of ensuring cutting, but not necessarily This is not a limitation. In this type of cutting apparatus, once cutting is started, the cutting tends to proceed at an accelerated rate as the single plate is conveyed. End of cutting if the cutting edge is within the range where the cutting is surely started even if the depth at the time of entering the inside of the rotation trajectory of the tip of the piercing body is equal to or less than the thickness of the single plate For example, in addition to the usual means for maintaining the cutting edge of the cutting blade sharp and starting cutting reliably, the installation of the above-mentioned single plate guide member is also reliable for cutting. Very effective at starting.
[0032]
Moreover, as a form of the cutting blade, it is possible to periodically re-grind and use a relatively large blade, but a thin and small spare blade shape is convenient, and a similar known cutting apparatus is used. From the results, it is possible to reduce the cost by mass production, so it can be disposable without re-polishing.
[0033]
【The invention's effect】
As is apparent from the above, according to the single plate cutting device according to the present invention, as in the case of similar known cutting devices, the preceding single plate and the following single plate can be reliably connected without stopping the transfer of the single plate. As a matter of course, the piercing and conveying member and the cutting blade do not come into contact with each other at any part, so that the possibility of excessive wear of any member is eliminated. Since the cutting blade (including the blade holding member) having a small inertia is alternately reciprocated as compared with the single plate guide member in the above-described known cutting apparatus, a single blade is used. Compared with known cutting devices that alternately reciprocate the plate guide members, the responsiveness at the time of cutting can be improved, and it is convenient for cutting a single plate at a high speed.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a cutting device for a single plate according to the present invention.
FIG. 2 is a partial plan view of a cutting blade and a blade holding member used in the single plate cutting apparatus illustrated in FIG. 1;
3 is a cross-sectional explanatory view taken along line HH in FIG. 2;
FIG. 4 is an operation explanatory diagram of the single plate cutting apparatus illustrated in FIGS. 1 to 3;
FIG. 5 is a schematic side view of another embodiment of the single plate cutting device according to the present invention.
FIG. 6 is a schematic side view illustrating still another embodiment of the single-plate cutting apparatus according to the present invention.
[Explanation of symbols]
1, 2, 13, 14: Inserting and conveying member 3: Loading conveyor 4: Cutting blade 4 a: Cutting blade edge 4 b: Plural grooves 5 formed on the cutting blade 5: Blade holding member 6: Actuating mechanism 7: Single plate Detectors 9, 9a: Single plate peeling members 10, 18: Control mechanisms 11, 15: Conveyor 12: Single plate guide members 16, 17: Standard detector

Claims (4)

Each has multiple piercing bodies for single plate piercing in a double row with an arbitrary interval in the axial direction around the periphery, and each piercing body is provided in an opposing manner so that the piercing bodies are aligned in the same row. In a position corresponding to each row of the piercing bodies of the pair of piercing bodies in the vicinity of the blade edge including the blade edge, a pair of piercing and conveying members for conveying a single plate that are rotated symmetrically through the mechanism The blade tip has a plurality of narrow grooves that allow the piercing body to intervene, and the cutting edge directed in the direction opposite to the veneer conveying direction is more than the rotational trajectory of the tip of the piercing body on the outlet side of each piercing conveyance member. A cutting blade provided so as to be reciprocally rotatable so as to alternately enter inward by a desired depth, and an operation mechanism for alternately reciprocatingly rotating the cutting blade in response to a cutting signal of a veneer single plate. A veneer veneer cutting device comprising the veneer veneer. 2. The veneer single plate cutting device according to claim 1, wherein a portion constituting the bottom of the plurality of fine grooves in the cutting blade is formed in a blade shape. A veneer peeling member that facilitates the release of the veneer from the piercing body is arranged on the lower side of the veneer conveyance direction from the position of the cutting blade intervention between each row of the piercing bodies of each piercing conveyance member. The veneer veneer cutting device according to claim 1 or 2, wherein the veneer veneer cutting device is provided. In principle, the veneer conveying direction of the veneer is positioned on the upper side of the veneer conveying direction with respect to the rotation trajectory of the cutting edge between the rows of piercing bodies of the piercing conveying members. 4. A veneer veneer cutting apparatus according to claim 1 or 2, wherein a veneer guide member for guiding the veneer is disposed.

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