JP2007237539A - Ink fountain apparatus of printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve accuracy of the amount of ink delivery and to facilitate cleaning. <P>SOLUTION: A holding bar 10 is formed a little longer than the length of a body of an ink fountain roller 1 and is fitted to a fountain key supporting base 3 so as to extend in the axial line direction of the ink fountain roller 1. An ink fountain key 16 is arranged near the peripheral face of the ink fountain roller 1 and a number of the ink fountain keys are arranged in the axial line direction of the ink fountain roller 1. A support pin 15 is formed into the same length as that of the holding bar 10, and the ink fountain key 16 is held on the holding bar 10 through the support pin 15 by an elastic force of a tray spring 21. A first recessed channel formed into a circular arc shape coming into contact so as to be slidable with a first slidable contact face of the support pin 15 is provided on the ink fountain key 16. The ink fountain key 16 is supported so as to be freely swung to the holding bar 10 around the first slidable contact face of the support pin 15 as a swinging support, and a gap between the peripheral face of the ink fountain roller 1 is changed by swinging. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ink fountain device for a printing press that adjusts an ink discharge amount by changing a gap between an ink fountain key and a peripheral surface of the ink fountain by swinging the ink fountain key.

As an ink fountain device of a conventional printing press, there are a plurality of adjustment pieces (ink fountain keys) provided close to the peripheral surface of the ink fountain roller, a shaft that supports these adjustment pieces in a swingable manner, and each adjustment. What is provided with a plurality of urging means for urging the piece in the direction of separating from the peripheral surface of the ink fountain roller, and a plurality of adjustment screws for pressing the arm portion of each adjustment piece against these urging means is there. In the ink fountain device of this printing press, the amount of ink discharged is adjusted by changing the gap between each adjustment piece and the peripheral surface of the ink fountain roller by advancing and retracting each adjustment screw (for example, Patent Document 1). reference).
Japanese Patent Publication No. 1-51344 (page 3, left column, lines 15-34, FIG. 3)

  In the ink fountain device of the conventional printing press described above, since both ends of the shaft that supports the adjustment piece in a swingable manner are supported by the frame body, the shaft is easily bent, and in particular, the central portion is greatly bent. . As the shaft bends, the accuracy of the gap formed between the adjustment piece supported by the shaft and the peripheral surface of the ink fountain roller is lowered, so that the accuracy of ink discharge amount is lowered. It was. In addition, since the adjustment piece is displaced from a predetermined position due to the bending of the shaft, a gap is formed between the adjustment piece and the member forming the bottom surface of the ink fountain, and ink enters the gap. It will end up. Thus, the work of removing the ink that has entered the gap is complicated, and if the ink removal is incomplete, the remaining ink is solidified, and the adjustment piece becomes inoperable due to the solidified ink, There has also been a problem that the amount of ink discharged cannot be adjusted.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an ink fountain device for a printing press that improves the accuracy of the ink discharge amount and facilitates cleaning.

  In order to achieve this object, the invention according to claim 1 is characterized in that a plurality of ink fountain keys arranged in the vicinity of the peripheral surface of the ink fountain roller and provided in the axial direction of the ink fountain roller are swingably supported. In an ink fountain device of a printing press that adjusts the amount of ink discharged by changing the clearance between the peripheral surface of the ink fountain roller and the ink fountain key by swinging the 壷 key, A fulcrum member that engages as a whole and forms a swinging fulcrum of the ink fountain key; and a holding member that supports substantially the entire axial direction of the fulcrum member and holds the ink fountain key via the fulcrum member; A first engaging portion is provided at a portion where the fulcrum member of the ink fountain key is engaged, and the ink fountain key can be swung freely by engaging the first engaging portion with the fulcrum member. It is what was supported.

  According to the second aspect of the present invention, a plurality of ink fountain keys arranged in the vicinity of the peripheral surface of the ink fountain roller and supported in the axial direction of the ink fountain roller are swingably supported, and the ink fountain key is swung. In an ink fountain device for a printing press that adjusts the amount of ink discharged by changing the gap between the peripheral surface of the ink fountain roller and the ink fountain key, substantially the entire ink fountain key in the width direction is engaged with the ink fountain key. And a holding member for holding the ink fountain key through the fulcrum, and a first engagement is provided at a portion of the ink fountain key that is engaged with the fulcrum member. The ink fountain key is swingably supported by providing a joint portion and engaging the first engagement portion with the fulcrum member.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the first engaging portion and a portion where the first engaging portion of the fulcrum member is engaged are formed in a substantially arc-shaped cross section. Is.

  The invention according to claim 4 is the invention according to claim 3, wherein the fulcrum member is provided with a first slidable contact surface that is slidably contacted with the first engaging portion.

  The invention according to claim 5 is the invention according to claim 1, wherein a second engaging portion is provided at a portion of the holding member where the fulcrum member is engaged, and the fulcrum member is provided with the second engaging portion. A second sliding contact surface in sliding contact is provided.

  The invention according to claim 6 is the invention according to claim 5, wherein the second engaging portion and a portion where the second engaging portion of the fulcrum member engages are formed in a substantially arcuate cross section. is there.

  According to the present invention, since the fulcrum member is not supported partially but is held by the holding member and the plurality of ink fountain keys, the fulcrum member is not bent. For this reason, since the accuracy of the gap formed between the ink fountain key supported by the fulcrum member in a swingable manner and the peripheral surface of the ink fountain roller does not deteriorate, the accuracy of the ink discharge amount is reduced. Can be improved. Further, since the fulcrum member does not bend, the ink fountain key is always positioned at a predetermined position, so that no gap is formed between the ink fountain key and the fulcrum member engaged therewith. . For this reason, since ink does not enter between the ink fountain key and the fulcrum member, the cleaning operation for removing the ink adhering to the bottom surface of the ink fountain is facilitated, and the ink fountain key is moved by the solidified ink. There will be no inactivity.

  According to the second aspect of the present invention, since no gap is formed between the fulcrum member and the ink fountain key, the ink does not enter between them, so that it adheres to the bottom surface of the ink fountain. Cleaning work for removing the used ink is facilitated. Further, since the contact area between the first slidable contact surface of the fulcrum member and the first concave groove of the ink fountain key that engages with the first slidable contact surface is increased, the wear generated between them is reduced, which is durable. Improves.

  According to the invention which concerns on Claim 3, the operation | work which assembles an ink fountain key to a holding member via a fulcrum member becomes easy.

  According to the invention according to claim 4, since no gap is formed between the fulcrum member and the holding member, ink does not enter between them, so that the ink adheres to the bottom surface of the ink fountain. Cleaning work for removing ink becomes easy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a side view of an ink fountain device of a printing press according to the present invention, FIG. 2 is a plan view showing part of the same, FIG. 3 is a rear view showing part of the same, FIG. 4 is a side sectional view, and FIG. FIG. 6 is a cross-sectional view showing the main part in an enlarged manner, FIG. 7 is a cross-sectional view showing the driving part of the screw key opening / closing screw rod, and FIG. 8 is an enlarged view of the main part. FIG. 9 is a model diagram for explaining the opening / closing operation of the ink fountain roller. FIG. 9 (A) shows the opening operation from the closed state, and FIG. 9 (B) shows the closing operation. FIG. 10 is an enlarged side view of the main part.

  The ink fountain roller denoted by reference numeral 1 in FIGS. 1 to 4 is pivoted between the left and right machine base frames 2 and 2 (one machine frame 2 is not shown). Rotate clockwise (arrow A direction). Reference numeral 3 denotes a 壷 key support base as a 壷 main body provided behind the ink fountain roller 1, which is formed slightly longer than the cylinder length of the ink fountain roller 1, and as shown in FIG. 4, 4 (one of the stays 4 is not shown) is integrally projected. The stay 4 is integrally provided with a cylindrical body 6 having a bearing hole 5 formed in a non-through hole shape. Reference numeral 7 denotes an engagement piece that engages with a head portion 63 of a bolt 59, which will be described later, and projects integrally with the lower peripheral surface of the cylindrical body 6. Reference numeral 8 denotes a first support pin implanted in the machine base frames 2, 2. The first support pin 8 is engaged with the bearing hole 5, and the 壷 key support base 3 is connected to the first support pin 3. The support pin 8 is configured to be rotatable in the clockwise / counterclockwise direction (arrow B-C direction) in FIG. Here, the fact that the 壷 key support 3 is pivotably supported on the machine frame 2 means that the 壷 key support 3 is attached to the machine frame as the first support pin as shown in the embodiment here. 8 also includes a state of being supported so as to be swingable indirectly via 8.

  In FIG. 4, reference numeral 10 denotes a holding bar as a holding member attached to a groove 11 provided at the upper end portion on the front end side of the 壷 key support base 3 so as to extend in the axial direction of the ink fountain roller 1. The length of the ink fountain roller 1 is substantially the same. As shown in FIG. 5, the holding bar 10 is formed with a large-diameter hole 12 and a small-diameter hole 13 communicating with the large-diameter hole 12 extending in the front-rear direction. A plurality of pairs are provided in the axial direction of the ink fountain roller 1 corresponding to a plurality of ink fountain keys 16 described later. Further, as shown in FIG. 6, the upper portion of the holding bar 10 on the front end side has a second engagement with a circular arc cross section in which a second slidable contact surface 15 b of a fulcrum pin 15 described later as a fulcrum member is in slidable contact. A second concave groove 14 is formed as a part. As described above, the holding bar 10 is provided with the second concave groove 14 having a circular arc cross section, and the fulcrum pin 15 is provided with the second slidable contact surface 15b slidably in contact with the second concave groove 14, thereby supporting the fulcrum pin. Since no gap is formed between 15 and the holding bar 10, ink does not enter between them, so that the cleaning operation for removing the ink adhering to the bottom surface of the ink fountain is easy. Become.

  The fulcrum pin 15 has an elongated, substantially cylindrical shape, is formed to have the same length as the holding bar 10, and is provided with a flat surface 15c at the upper end. In FIG. 4, reference numeral 16 denotes an ink fountain key formed in a prismatic shape, and a plurality of ink fountain keys are provided in the axial direction of the ink fountain roller 1 so as to be close to the peripheral surface of the ink fountain roller 1. The overall length of the key 16 in the width direction is the same as the length of the ink fountain roller 1. As shown in FIG. 5, the ink fountain key 16 is provided with a through hole 17 having the same diameter as the small diameter hole 13 of the holding bar 10 described above. As shown in FIG. 8, a concave portion 17a formed in a substantially hemispherical shape is provided. Further, as shown in FIG. 6, the rear end surface of the upper portion of the ink fountain key 16 has a first engagement portion as a first engagement portion having a circular arc cross section that is in sliding contact with the first sliding contact surface 15 a of the fulcrum pin 15. The concave groove 18 is formed.

  In FIG. 5, reference numeral 20 denotes a pin for opening an ink key that is loosely inserted into the small-diameter hole 13 of the holding bar 10 and the through-hole 17 of the ink key 16, and a head 20a is provided at one end. As shown, a bulging portion 20b formed in a substantially hemispherical shape that engages with the concave portion 17a of the ink fountain key 16 is provided at the other end portion. Reference numeral 21 denotes a disc spring interposed in a compressed state between the head portion 20 a of the key opening pin 20 and the bottom portion 12 a of the large-diameter portion 12 of the holding bar 10. By the elastic force of the disc spring 21, the ink fountain key 16 is allowed to swing freely with the first sliding contact surface 15a of the fulcrum pin 15 with which the first concave groove 18 is in sliding contact as a swinging fulcrum. The upper end portion of the 壷 key 16 is held by the holding bar 10 via the fulcrum pin 15. That is, the elastic force of the disc spring 21 urges the ink fountain key 16 to be pressed against the fulcrum pin 15. At the same time, the pin 20 for opening the fountain key opens the ink fountain key 16 in the direction in which the ink fountain key 16 is separated from the peripheral surface of the ink fountain roller 1 by the elastic force of the disc spring 21, that is, the fulcrum pin 15 is the pivot. It is energized clockwise in the figure.

  As described above, the ink fountain key 16 is pressed against the fulcrum pin 15 by the elastic force of the disc spring 21, and the first concave groove 18 of the ink fountain key 16 slidably contacts the first slidable contact surface 15 a of the fulcrum pin 15. Is formed in an arc shape, no gap is formed between the fulcrum pin 15 and the ink fountain key 16. For this reason, since ink does not enter between the fulcrum pin 15 and the ink fountain key 16, the cleaning operation for removing the ink adhering to the bottom surface of the ink fountain is facilitated, and the ink is solidified by the solidified ink. There is no possibility that the 壷 key 16 becomes inoperative. Further, since the first concave groove 18 slidably contacting the first slidable contact surface 15a of the fulcrum pin 15 is formed in an arc shape, the first slidable contact surface 15a of the fulcrum pin 15 and the first concave groove 15 are formed. Since the contact area between the grooves 18 is increased, the wear generated between them is reduced, so that the durability is improved.

  Further, the bulging portion 20 b formed in the hemispherical shape of the pin 20 for opening the key is engaged with the concave portion 17 a formed in the hemispherical shape of the ink fountain key 16, and the bulging portion is generated by the elastic force of the disc spring 21. 20b is pressed against the recess 17a. For this reason, since no gap is formed between the bulging portion 20b and the concave portion 17a, ink does not enter between the bulging portion 20b and the concave portion 17a.

  Thus, the fulcrum pin 15 is not partially supported, but the entire fulcrum pin 15 is held by the holding bar 10 and the plurality of ink fountain keys 16, so that the fulcrum pin 15 is bent. There is nothing. For this reason, the accuracy of the gap formed between the ink fountain key 16 and the peripheral surface of the ink fountain roller 1 that are supported by the fulcrum pin 15 in a swingable manner is not reduced, so that the amount of ink discharged is reduced. Accuracy can be improved. Further, since the fulcrum pin 15 is not bent, the ink fountain key 16 is always positioned at a predetermined position, so that a gap is formed between the ink fountain key 16 and the fulcrum pin 15 engaged therewith. There is nothing. For this reason, since ink does not enter between the ink fountain key 16 and the fulcrum pin 15, the cleaning operation for removing the ink adhering to the bottom surface of the ink fountain 25 is facilitated, and the ink fountain is formed by the solidified ink. The key 16 does not become inoperative.

  In FIG. 4, reference numeral 22 denotes a bottom plate fixed to the upper surface of the ink key support base 3 and forming the bottom surface of the ink fountain together with the upper surface of the ink fountain key 16, and one end side is a holding bar 10 as shown in FIGS. And most of the flat portion 15c of the fulcrum pin 15 are covered. As described above, the fulcrum pin 15 is provided with the flat portion 15c, and most of the flat portion 15c is covered with the bottom plate 22, so that the second slidable contact surface 15b of the fulcrum pin 15 and the second recess of the holding bar 10 are covered. Ink does not enter between the grooves 14.

  In FIG. 1 and FIG. 2, reference numeral 23 denotes a fixed key that is provided at both ends of the ink fountain key 16 (one is not shown) and is attached to the holding bar 10. Reference numeral 24 denotes an ink basin formed in a triangle in a side view, and is erected so as to be opposed to each other at both ends in the width direction of the key support base 3 (one ink basin 24 is not shown). As shown in FIG. 4, the ink 26 is formed in the ink fountain 25 formed by being surrounded by the ink basins 24 and 24, the bottom plate 22, the ink fountain key 16, the fixed fountain key 23 and the peripheral surface of the ink fountain roller 1. It is stored.

  As shown in FIG. 3 and FIG. 4, a recess 27 having an opening on the back side is provided at the lower part of the ３key support 3 so as to extend between both ends of the ３key support 3. A plurality of through holes 28 communicating with the recess 27 and penetrating through the front end of the ink key support 3 are provided in correspondence with the plurality of ink fountain keys 16 described above. In FIG. 4, reference numeral 29 denotes a motor accommodated in the recess 27 and provided in correspondence with the plurality of ink fountain keys 16, and is supported by a support plate 30 attached to the opening edge of the recess 27.

  As shown in FIG. 7, a motor gear 31 is attached to the output shaft of the motor 29, and a transmission gear 32 is engaged with the motor gear 31. Reference numeral 33 denotes a screw rod support block attached to the support plate 30, and a screw hole 33 a is provided at the center. Reference numeral 34 denotes a plurality of key opening / closing screw rods provided corresponding to the ink fountain key 16, and a screw portion 34 a provided at the center portion is screwed into the screw portion 33 a of the screw rod support block 33. A gear 35 that meshes with the transmission gear 32 is pivotally attached to one end portion of the 壷 key opening / closing screw rod 34 protruding from the support plate 30. Further, a pressing member 36 is provided at the other end of the key-opening / closing screw rod 34, and the pressing member 36 is inserted into the through hole 28 of the key-supporting base 3 as shown in FIG. The tip is in contact with the lower end of the ink fountain key 16.

  In such a configuration, by driving the motor 29 in one direction, the rotation of the output shaft of the motor 29 is transmitted from the motor gear 31 to the gear 35 via the transmission gear 32, and the gear 35 rotates clockwise in FIG. To do. By rotating the gear 35 in the clockwise direction, the screw key opening / closing screw rod 34 in which the screw portion 34a is screwed into the screw hole 33a of the screw rod support block 33 moves in the direction of arrow D in FIG. The child 36 advances from the through hole 28. As the presser 36 advances, the ink fountain key 16 swings counterclockwise against the elastic force of the disc spring 21 as shown by the solid line in FIG. A gap t between the peripheral surface of the fountain roller 1 and the corner portion 16a of the ink fountain key 16 is adjusted to be narrow as shown by a solid line in FIG. 8 so that the amount of ink discharged from the ink fountain 25 is reduced. .

  On the other hand, by driving the motor 29 in the other direction opposite to the one direction, the rotation of the output shaft of the motor 29 is transmitted from the motor gear 31 to the gear 35 via the transmission gear 32, and the gear 35 is counterclockwise in FIG. Rotate in the direction. By rotation of the gear 35 in the counterclockwise direction, the 開 閉 key opening / closing screw rod 34 in which the screw portion 34a is screwed into the screw hole 33a of the screw rod support block 33 moves in the direction of arrow E in FIG. The pressing element 36 is retracted into the through hole 28. As the presser 36 moves backward, the ink fountain key 16 is swung clockwise by the elastic force of the disc spring 21 as shown by a two-dot chain line in FIG. The gap t between the circumferential surface of the ink fountain key 16 and the corner 16a of the ink fountain key 16 is adjusted so as to increase as shown by the two-dot chain line in FIG.

  In FIGS. 1 and 2, 40 and 40 are second support pins (one second support pin 40 is not shown) as pivots implanted in the left and right machine base frames 2 and 2, A small-diameter portion 40a is provided at the tip portion. Reference numeral 41 denotes a lever formed in a U-shaped cross-section with an opening at the bottom, and holes 41b and 41b provided at one end of both side portions 41a and 41a have a first pin 43 as a swing member. Both ends are inserted. As shown in FIG. 10, an insertion hole 43a penetrating in the radial direction is provided at the center of the first pin 43, and flat portions 43b and 43c are formed at the opening edge of the insertion hole 43a. ing. Reference numeral 44 denotes a bolt as a shaft member inserted into the insertion hole 43a of the first pin 43, and a double nut 45 is screwed to one end protruding from the insertion hole 43a.

  Further, a bearing portion 44a formed in a flat rectangular parallelepiped is integrally provided at the other end portion of the bolt 44, and the hole 44b formed in the bearing portion 44a is provided with the second support pin 40 described above. A small diameter portion 40a is engaged. Therefore, the second pin 51 side of the lever 41 is rotated in the clockwise / counterclockwise direction in FIG. 1 with the first support pin 8 as a rotation center, and the first pin 43 side of the lever 41 is the first pin. 2 is supported so as to be rotatable in the clockwise and counterclockwise directions in FIG. That is, the lever 41 is supported on the machine base frame 2 side where the first support pin 8 is implanted and on the side of the key support base 3 that rotates around the first support pin 8. A double nut 46 is screwed onto the other end of the bolt 44, and washers 46a and 46b are interposed between the double nut 46 and the flat portion 43b of the first pin 43 as shown in FIG. A plurality of disc springs 47 as second biasing means are interposed.

  1 and 2, reference numeral 48 denotes a support block attached to the stay 4, and a bolt 49 functioning as a stopper is screwed into a screw hole of the support block 48, and the tip of the support block 48 is a second support. It selectively abuts against the peripheral surface of the pin 40. When the tip of the bolt 49 comes into contact with the peripheral surface of the second support pin 40, the swinging of the key support base 3 is restricted and the ink fountain 25 is formed. Therefore, the bolt 49 and the second support pin 40 form the swing restricting means 50. Reference numeral 51 denotes a second pin as a support shaft fitted and fixed in the hole of the support block 48, and both end portions of the second pin 51 protruding from the support block 48 are both side portions 41 a and 41 a of the lever 41. Are inserted into the holes 41c and 41c. Therefore, by operating the operation unit 42 in the direction of arrow H in FIG. 1, the first pin 43 (bolt 44) supported by the lever 41 is first second as shown in FIG. The pin 51 is rotated about α ′ about the rotation center. Next, the second pin 51 supported on the key support base 3 via the support block 48 is simultaneously rotated counterclockwise by an angle α with the small diameter portion 40a of the second support pin 40 as the rotation center. The first support pin 8 is rotated in the counterclockwise direction (arrow C direction) by an angle β with the rotation center as a rotation center. Therefore, the 壷 key support 3 also rotates counterclockwise (arrow C direction) by an angle β as shown by a two-dot chain line in FIG. 1, and the 壷 key support 3 is separated from the ink fountain roller 1 for maintenance. Positioned in position.

  On the other hand, in order to position the key key support 3 close to the ink fountain roller 1 and position it at the printable position from the state where the key key support base 3 is positioned at the maintainable position separated from the ink fountain roller 1, FIG. The operation unit 42 indicated by a two-dot chain line is rotated in the arrow G direction. By the rotation operation of the operation unit 42, the first pin 43 is rotated clockwise by an angle α with the small diameter portion 40a of the second support pin 40 as the rotation center. At the same time, the second pin 51 supported by the 壷 key support 3 via the support block 48 rotates clockwise by the angle β around the first support pin 8, and the ３key support 3 1 is rotated clockwise by an angle β as shown by a solid line in FIG. 1, approaches the ink fountain roller 1, is positioned at a printable position, and the tip of the bolt 49 contacts the peripheral surface of the second support pin 40. . When the tip of the bolt 49 comes into contact with the peripheral surface of the second support pin 40, the first pin 43 is configured to be able to rotate clockwise by α ′ around the second pin 51. .

  3, 55 and 55 are bolts (one bolt 55 is not shown) screwed to the machine base frames 2 and 2, and are supported by a base 56 attached to the machine base frame 2. A spring receiver 58 having an insertion hole 57 formed in a prism shape is provided on the head. Bolts 59 are inserted into the insertion holes 57 of the spring receiver 58, and double nuts 60 and 61 are screwed into both ends of the bolt 59. Between the one double nut 61 and the spring receiver 58, A plurality of disc springs 62 as first biasing means are interposed in a compressed state. The head portion 63 of the bolt 59 selectively abuts on the engaging piece 7 protruding from the stay 4 of the above-described key support table 3.

  Next, in the ink fountain device of the printing press configured as described above, the solid key from the state where the key support base 3 indicated by a two-dot chain line in FIG. The operation of moving to the printable position shown will be described. First, in FIG. 1, the operation portion 42 located at the position indicated by the two-dot chain line is rotated in the direction of the arrow G, whereby the 壷 key support base 3 is rotated around the first support pin 8 as a center of rotation. Rotate in the direction. When the ink fountain key 16 approaches the peripheral surface of the ink fountain roller 1, the engagement piece 7 of the fountain key support 3 abuts against the head 63 of the bolt 59. Further, by slightly rotating the 回 動 key support 3 in the clockwise direction, the 壷 key support 3 is urged counterclockwise around the first support pin 8 by the elastic force of the disc spring 62. Is done. At the same time, the tip of the bolt 49 comes into contact with the peripheral surface of the second support pin 40. In this state, the screwing amount of the bolt 49 that is screwed into the screw hole of the support block 48 is adjusted in advance so that the key key support base 3 comes close to the ink fountain roller 1.

  Accordingly, when the operation portion 42 is rotated in the direction of arrow G, the elastic key F1 (see FIG. 9B) of the disc spring 62 resists the rotation operation so that the 壷 key support 3 is The first support pin 8 is urged in a fixed direction, that is, counterclockwise with the rotation center as a center.

  In this state, when the operation unit 42 is further slightly rotated in the direction of arrow G, the tip of the bolt 49 comes into contact with the peripheral surface of the second support pin 40, and the movement of the second pin 51 is restricted. Therefore, the first pin 43 that has been rotated with the small-diameter portion 40a of the second support pin 40 as the rotation fulcrum is switched so as to rotate with the second pin 51 as the rotation center. Therefore, when the first pin 43 rotates by the angle α ′ as shown in FIG. 9A, the rotation locus of the first pin 43 is changed, and the second pin 51 and the second support pin 40 are changed. The small-diameter portion 40a and the first pin 43 are positioned in a straight line. At this time, the interval between the first pin 43 and the second pin 51 is longer than the interval between the first pin 43 and the small-diameter portion 40a, and the small-diameter portion 40a is connected to the first pin 43 and the second pin. 10, when the first pin 43 is rotated by the angle α ′, the first pin 43 is rotated at an angle α ′ as shown in FIG. The pin 43 slightly moves in the direction of arrow E. By this movement, the flat portion 43b of the first pin 43 presses the disc spring 46b in the direction of arrow E, so that the disc spring 47 is further compressed. Therefore, when the first pin 43 is rotated within the range of the angle α, no gap is generated between the other flat portion 43c and the washer 46c, but when the disc spring 47 is further compressed, A gap δ is formed between the flat portion 43c and the washer 46c.

  At this time, the lower surfaces 41d and 41d of the both side portions 41a and 41a of the lever 41 abut against the peripheral surface of the second support pin 40, and these lower surfaces 41d and 41d serve as stoppers that restrict the rotation of the lever 41 in the clockwise direction. Therefore, the elastic force of the disc spring 47 maintains the state where the second pin 51, the small diameter portion 40a of the second support pin 40, and the first pin 43 are positioned in a substantially straight line. That is, as shown in FIG. 9 (B), the first pin 43 forms a line K connecting the second pin 51 and the small diameter portion 40a of the second support pin 40 and the first pin 43 with a so-called death. It is positioned at a position indicated by a two-dot chain line beyond the point, and this state is held by the biasing force F <b> 2 of the disc spring 47.

  In this state, the key support 3 is urged in a fixed direction by the elastic force of the disc spring 62, so that the first support pin 8 and the bearing hole 5 are always in contact at the same point P, and the key The bearing hole 5 of the support base 3 is supported by the first support pin 8 without a clearance. Further, since the first pin 43 is urged in the direction of arrow D by the elastic force of the disc spring 47, the first pin 43 is in contact with the hole 41b of the handle support member 41 at the point Q, The first pin 43 is supported in the hole 41b with no clearance.

  Further, since the bolt 44 is urged in the direction of arrow E by the elastic force of the disc spring 47, the hole 44b of the bolt 44 is in contact with the small diameter portion 40a of the second support pin 40 at the point R, and the small diameter The portion 40a is supported in the hole 44b with no clearance. Further, since the first pin 43 is urged in the direction of arrow D by the elastic force of the disc spring 47, the handle support member 41 is also urged in the direction of arrow D. Therefore, the second pin 51 and the hole 41c of the handle support member 41 are in contact with each other at the point S, and the second pin 51 is supported in the hole 41c without a clearance.

  Therefore, when the tip of the bolt 49 is brought into contact with the peripheral surface of the second support pin 40 and the ink fountain 25 is closed, the second pin 51 is always positioned at the same position, and as described above, the key The bearing hole 5 of the support base 3 is always supported by the first support pin 8 at the same counter contact P without clearance. Accordingly, the key support 3 supported by the second support pin 40 and the first support pin 8 is always positioned at the same position when the ink fountain 25 is closed. That is, the gap between the peripheral surface of the ink fountain roller 1 and the ink fountain key 16 does not fluctuate each time the ink fountain 25 is opened and closed.

  In the present embodiment, an example in which the holding bar 10, the fulcrum pin 15, and the ink fountain key 16 are individually provided has been described. However, the fulcrum pin 15 may be formed integrally with the holding bar 10. In this case, the operation of assembling the ink fountain key to the holding bar 10 via the fulcrum pin 15 is facilitated, and no gap is formed between the fulcrum pin 15 and the holding bar 10. Further, the first and second concave grooves 18 and 14 are formed in an arc shape in cross section, but any engagement portion that engages with the first and second sliding contact surfaces 15a and 15b of the fulcrum pin 15 may be used. For example, it may be formed in a cross-sectional shape.

It is a side view of the ink fountain device of the printing press which concerns on this invention. It is a top view which shows a part of ink fountain device of the printing press which concerns on this invention. It is a rear view which shows a part of ink fountain device of the printing press which concerns on this invention. It is a sectional side view of the ink fountain device of the printing press which concerns on this invention. It is sectional drawing which shows the principal part of the ink fountain apparatus of the printing press which concerns on this invention. It is sectional drawing which expands and shows the principal part of the ink fountain apparatus of the printing press which concerns on this invention. In the ink fountain device of the printing press which concerns on this invention, it is sectional drawing which shows the drive part of the screw rod for 壷 key opening and closing. It is sectional drawing which expands and shows the principal part of the ink fountain apparatus of the printing press which concerns on this invention. In the ink fountain device of the printing press according to the present invention, it is a model diagram for explaining the opening / closing operation of the ink fountain roller, wherein FIG. (A) shows the opening operation from the closed state, and FIG. Indicates a closing operation. It is a side view which expands and shows the principal part of the ink fountain device of the printing press which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Ink fountain roller, 3 ... 壷 key support stand, 10 ... Holding bar, 14 ... 2nd groove (2nd engaging part), 18 ... 1st groove (1st engaging part), DESCRIPTION OF SYMBOLS 15 ... Supporting pin, 15a ... 1st sliding contact surface, 15b ... 2nd sliding contact surface, 16 ... Ink fountain key, 20 ... Pin for key opening, 20b ... Bulge part, 21 ... Belleville spring, 22 ... Bottom plate, 24 ... ink cuff, 25 ... ink fountain, 26 ... ink, 34 ... 壷 key opening / closing screw rod.

Claims (6)

A plurality of ink fountain keys arranged in the axial direction of the ink fountain roller, which are arranged in proximity to the circumferential surface of the ink fountain roller, are supported in a swingable manner. In the ink fountain device of a printing press that adjusts the amount of ink discharged by changing the gap with the 壷 key,
A fulcrum member that engages substantially the whole width direction of the plurality of ink fountain keys to form a swing fulcrum of the ink fountain key;
A support member that supports substantially the entire axial direction of the fulcrum member and holds the ink fountain key via the fulcrum member;
A first engagement portion is provided at a site where the fulcrum member of the ink fountain key is engaged,
An ink fountain device for a printing press, wherein the ink fountain key is supported in a swingable manner by engaging the first engagement portion with the fulcrum member. A plurality of ink fountain keys arranged in the axial direction of the ink fountain roller, which are arranged in proximity to the circumferential surface of the ink fountain roller, are supported in a swingable manner. In the ink fountain device of a printing press that adjusts the amount of ink discharged by changing the gap with the 壷 key,
A plurality of the ink fountain keys that have substantially fulcrum portions that engage with each other in the width direction of the ink fountain key to form a swing fulcrum of the ink fountain key, and a holding member that holds the ink fountain key through the fulcrum portion; ,
A first engagement portion is provided at a site where the fulcrum member of the ink fountain key is engaged,
An ink fountain device for a printing press, wherein the ink fountain key is supported in a swingable manner by engaging the first engagement portion with the fulcrum member.   The ink fountain device for a printing press according to claim 1 or 2, wherein the first engaging portion and a portion with which the first engaging portion of the fulcrum member engages are formed in a substantially arc shape in cross section. .   4. The ink fountain device for a printing press according to claim 3, wherein the fulcrum member is provided with a first sliding contact surface that comes into sliding contact with the first engagement portion.   The holding member is provided with a second engaging portion at a site where the fulcrum member engages, and the fulcrum member is provided with a second slidable contact surface that slidably contacts the second engaging portion. An ink fountain device for a printing press according to claim 1.   6. The ink fountain device for a printing press according to claim 5, wherein the second engaging portion and a portion where the second engaging portion of the fulcrum member engages are formed in a substantially arc shape in cross section.

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