JP2008229910A - Opening and closing door structure of printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the opening and closing door structure of a printing machine having an opening having an opening area capble of being expanded while securing rigidity at the time of closing an opening and closing door. <P>SOLUTION: In this door structure, an opening and closing scaffold 40 by which the whole opening 21 opened to both an impression cylinder and an intermediate cylinder 10 can be opened and closed is provided, and in addition, a kneeling stand 50 which is opened and closed by being overlapped with the opening and closing scaffold 40 is also provided. By closing in a state that both the scaffold and the stand overlap with each other, the strength of a portion at which the kneeling stand 50 is provided can be improved. In addition, since the kneeling stand 50 can be opened and closed when necessary, in a state that an opening which is not so large 21 is necessary, the kneeling stand 50 is kept in a closed state, while, in a state that the larger opening 21 is necessary, the kneeling stand 50 is opened, resulting in enabling to enlarge the opening area of the opening 21. Consequently, the opening area of the opening 21 can be expanded while securing the rigidity at the closing of the opening and closing scaffold 40 being the opening and closing door. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door structure for a printing press. In particular, the present invention relates to an open / close door structure of a printing press that can be opened and closed when performing a maintenance operation of an impression cylinder and an intermediate cylinder of the printing press.

  FIGS. 13 and 14 are diagrams for explaining an open / close door of a conventional printing press, FIG. 13 is a schematic configuration diagram of a conventional printing apparatus, and FIG. 14 is a detailed view of a portion E of FIG. As shown in FIG. 13, printing apparatuses 81a and 81b of a printing machine such as a sheet-fed printing machine are units that perform predetermined printing on a sheet 82 conveyed from the upstream side, and are supplied to an ink reservoir (not shown). The applied ink is appropriately kneaded in the process of sequentially transferring the ink roller group 100, transferred to the printing plate 102 mounted on the plate cylinder 101 as an ink film, and further transferred to the outer peripheral surface of the downstream blanket cylinder 103 as a pattern. The Thereafter, the ink is transferred to the surface of the sheet 82 running between the blanket cylinder 103 and the impression cylinders 84a and 84b (indicated by reference numeral 84 when not individually distinguished), and predetermined printing is completed.

  Note that one set of printing apparatuses 81 can only print one color. Therefore, a printing machine that performs multicolor printing is configured as a printing device unit (printing device group) in which a plurality of sets of printing devices 81 a and 81 b having different ink colors are arranged in parallel along the traveling direction of the sheet 82. The desired multicolor printing is performed by sequentially passing the devices 81a and 81b. A multi-color printing press includes a number of printing apparatuses 81a and 81b corresponding to the number of printing colors, and a printing apparatus unit is configured by the plurality of printing apparatuses 81a and 81b. FIG. 13 shows a two-color printing device as an example.

  An intermediate cylinder 85 is provided between the impression cylinders 84a and 84b of the printing apparatuses 81a and 81b so as to contact the impression cylinders 84a and 84b and connect the printing apparatuses 81a and 81b. Further, claws 94 and 95 for holding the sheet 82 are provided in the peripheral surfaces of the impression cylinders 84a and 84b and the intermediate cylinder 85, respectively. As a result, the claws 94 and 95 hold or release the sheet 82 at an appropriate timing, so that the sheet 82 is received by the downstream impression cylinder 84b from the upstream impression cylinder 84a in the moving direction of the sheet 82. It is supposed to be passed. Therefore, for example, the sheet 82 on which the predetermined printing is performed while being held by the claw 94 of the impression cylinder 84a in the printing apparatus 81a is a contact portion where the impression cylinder 84a and the intermediate cylinder 85 of the printing apparatus 81a contact each other ( (Delivery point) 98 is transferred from the claw 94 of the impression cylinder 84a to the claw 95 of the intermediate cylinder 85, and then the contact portion (delivery point) where the intermediate cylinder 85 and the claw 94 of the impression cylinder 84b of the printing apparatus 81b come into contact with each other. ) 99, the sheet is transferred from the nail 95 of the intermediate cylinder 85 to the nail 94 of the impression cylinder 84b, and predetermined printing is performed while being held by the nail 94 of the impression cylinder 84b in the printing device 81b.

  Further, a bar-shaped paper guide 88 having a shape (substantially arc shape) along the surface 91 of the pressure drum 84a is provided above the pressure drum 84a. As shown in FIG. 14, the paper guide 88 is supported by a support beam 89 extending in the machine width direction, and is provided side by side in the machine width direction, and is a sheet held by the claw 94 of the impression cylinder 84 a. When 82 is transferred to the claw 95 of the intermediate cylinder 85 at the contact portion 98, the rear end of the sheet 82 is prevented from jumping up and being strongly hit against the surface 92 of the intermediate cylinder 85. The paper guide 88 is supported by the support beam 89 so as to be movable in the machine width direction. In FIG. 14, the paper guide 88 is shown only on the impression cylinder 84a of the printing apparatus 81a, but the same paper guide 88 is provided on the impression cylinder 84b of the printing apparatus 81b.

  By the way, when printing is performed with a printing press, ink is scattered on the surface 91 of the impression cylinder 84 where the sheet 82 does not contact, such as the vicinity of the axial end of the impression cylinder 84, and ink stains occur. Dirt easily accumulates on the part. Therefore, for example, after printing on the sheet 82 having a relatively small size, when printing on the sheet 82 having a size larger than the sheet 82 is started, the sheet 82 is placed on the portion where the ink stain is accumulated as described above. Contact. As a result, not only ink stains appear on the sheet 82, but also the printing pressure increases according to the thickness of the ink stains, making it impossible to perform beautiful printing. Further, if such ink stains are left for a long time, the ink stains are firmly attached to the surface 91 of the impression cylinder 84, so that it is a very difficult task to remove the ink stains. Further, since the printing surface of the sheet 82 comes into contact with the surface 92 of the intermediate cylinder 85, a special surface treatment is applied to the surface 92 of the intermediate cylinder 85 in advance, or a clothing material such as a show-through prevention material is pasted. However, it is necessary to periodically clean and replace the covering material. Therefore, it is necessary to periodically perform maintenance (inspection / maintenance work) of the impression cylinder 84 and the intermediate cylinder 85 so that such a problem does not occur.

Therefore, between the printing apparatuses 81a and 81b of the printing press, as shown in FIG. 14, the impression cylinder side opening / closing door (impression cylinder side) which is an opening / closing door mainly for performing maintenance of the impression cylinder 84 of the printing apparatus 81 is provided. Scaffolding 86, and an intermediate trunk side opening / closing door (intermediate trunk side scaffolding) 87 which is an opening / closing door for performing maintenance of the intermediate trunk 85 is provided. A beam 96 extends in the machine width direction at a substantially center of a space 97 formed between the printing device 81a and the printing device 81b. The impression cylinder side opening / closing door 86 and the intermediate cylinder side opening / closing door are provided. 87 is mounted to a pin 93 which is fixed to the beam 96, and the pin 93 as the fulcrum, the impression cylinder side door 86 opens in the direction of arrow a ₁ in FIG. 14, the transfer cylinder-side door 87 Is opened in the direction of arrow A ₂ in FIG.

  In general, since the distance L (see FIG. 13) between the printing device 81a and the printing device 81b is relatively narrow, for example, about 450 mm, both the impression cylinder side opening / closing door 86 and the intermediate cylinder side opening / closing door 87 are opened simultaneously. However, only one of the impression cylinder side opening / closing door 86 and the intermediate cylinder side opening / closing door 87 is opened. Accordingly, operations related to the pressure drum 84a such as cleaning of the surface 91 of the pressure drum 84a and adjustment of the claw 94 are performed by opening the pressure drum side opening / closing door 86, and intermediate operations such as cleaning of the surface 92 of the intermediate drum 85 and adjustment of the claw 95 are performed. The work relating to the cylinder 85 is performed by opening the intermediate cylinder side opening / closing door 87.

  As described above, the pressure drum 84 is provided with the paper guide 88 so that the sheet 82 does not come into contact with the intermediate drum 85 to be damaged. Nothing that contacts the sheet 82 is installed. For this reason, for example, when working with the impression cylinder side opening / closing door 86 opened, it is necessary to be careful not to let cleaning cloths, tools, hands, etc. get caught in the contact portion 98 of the impression cylinder 84a and the intermediate cylinder 85. There is. Similarly, when the middle cylinder side opening / closing door 87 is opened, it is necessary to be careful so that cleaning cloths, tools, hands, etc. are not caught between the intermediate cylinder 85 and the beam 96.

  For this reason, some conventional printing presses are equipped with a safety device that prevents such entrainment in case of an emergency. For example, the safety device for a printing press described in Patent Document 1 includes a limit switch that detects an open / close state of an impression cylinder side scaffold that is an impression cylinder side opening / closing door and an intermediate cylinder side scaffold that is an intermediate cylinder side opening / closing door. Yes. As a result, when it is detected by this limit switch that the impression cylinder side scaffold or the intermediate cylinder side scaffold is in the open state, the printing press is stopped and the operation mode of the printing press is set to be slower than the normal printing speed. Is set to “slow motion mode” that allows only slow motion (slow speed operation) suitable for maintenance such as cleaning.

  Further, the safety device of the printing press includes a safety bar that is a detection unit that detects the entry of foreign matter into the contact portion, and a moving mechanism that is a moving unit that can move the safety bar. This safety bar is located on the intermediate torso side when both the impression cylinder side scaffold and the intermediate torso side scaffold are closed, or when the intermediate torso side scaffold is open. Thereby, at the time of printing, the sheet does not come into contact with the intermediate cylinder by the paper guide provided on the impression cylinder, and the safety bar is located on the intermediate cylinder side even when the intermediate cylinder side scaffold is opened. Therefore, it is possible to detect the foreign matter entering from the intermediate cylinder side. Further, the moving mechanism is provided so that the safety bar can be moved to the impression cylinder side when the impression cylinder side scaffold is in an open state. Thereby, when the impression cylinder side scaffold is opened, the foreign material which approachs from the impression cylinder side can be detected. As a result, the maintenance of each of the two rotating cylinders that are in contact with each other can be performed more safely.

JP 2005-246859 A

  However, when maintaining the rotary cylinder, it is preferable that the working space is as large as possible. However, in a conventional printing machine such as a printing machine in a safety device of a printing machine described in Patent Document 1, the printing apparatus 81a and the printing apparatus The beam 96 (refer FIG. 14) is provided between 81b. For this reason, the opening / closing door that is opened when the maintenance of the rotating cylinder is performed is divided into two parts with the beam 96 interposed therebetween like the impression cylinder side opening / closing door 86 and the intermediate cylinder side opening / closing door 87, and the opening portion at the time of maintenance Will get smaller. If a beam is provided between the printing device 81a and the printing device 81b, the opening portion at the time of maintenance becomes small as described above. Therefore, it is conceivable to remove the beam 96 in consideration of maintainability. However, because this part including the impression cylinder side opening / closing door and the intermediate cylinder side opening / closing door serves as a scaffold for people to walk during maintenance work, securing rigidity is important, and the beam 96 is removed. It has become difficult. Accordingly, it has been difficult to achieve both expansion of the opening area of the opening during maintenance and securing of rigidity when the open / close door is closed.

  The present invention has been made in view of the above, and an object of the present invention is to provide a door structure for a printing press capable of expanding the opening area of the opening while ensuring rigidity when the door is closed. And

  In order to solve the above-described problems and achieve the object, an opening / closing door structure of a printing press according to the present invention includes a first rotary cylinder and a second rotary cylinder that are in contact with each other, the first rotary cylinder, and the second rotary cylinder. A cover part covering at least a part of the cylinder, an opening formed in the cover part and open to both the first rotary cylinder and the second rotary cylinder, and a main opening / closing door rotation axis And a main opening / closing door capable of opening and closing the entire opening by rotating to a center, and a part of the opening being openable / closable by rotating about a sub opening / closing door rotation shaft. And a sub-opening / closing door that is closed on the main opening / closing door when the opening / closing door is closed.

  In this invention, the main opening / closing door which can open and close the whole opening part opened with respect to both the 1st rotating drum and the 2nd rotating drum is provided, and also a part of opening part is opened and closed, and the main opening / closing door is provided. And a sub-opening door that can be overlapped and closed. For this reason, when the main opening / closing door and the sub opening / closing door are overlapped and closed, the strength of the portion provided with the sub opening / closing door is improved, so that rigidity can be ensured. Moreover, since the sub opening / closing door which acts as a member which ensures rigidity by overlapping with the main opening / closing door is formed to be able to open / close a part of the opening, it can be opened / closed as necessary. For example, when maintenance work for the first rotary drum or the second rotary drum is not necessary, the secondary door is closed when a very large opening is not required, and the secondary door is open when a large opening is required. By opening, the opening area of the opening can be increased. As a result, the opening area of the opening can be enlarged while ensuring the rigidity when the door is closed.

  The opening / closing door structure for a printing press according to the present invention is characterized in that an outer peripheral portion of the sub opening / closing door is folded.

  In this invention, since the outer peripheral part of the sub opening / closing door is folded back, the rigidity of the sub opening / closing door alone can be improved. For this reason, when closing the main opening / closing door, it is possible to improve rigidity when the main opening / closing door is closed by overlapping the sub opening / closing door. As a result, the opening area of the opening can be expanded while ensuring the rigidity when the door is closed more reliably.

  In the opening / closing door structure of the printing press according to the present invention, the main opening / closing door and the sub opening / closing door are provided so as to be openable / closable in the same direction, and the auxiliary opening / closing door closes the auxiliary opening / closing door. In this case, a force acting in the closing direction can be transmitted to the cover portion.

  In this invention, since the sub open / close door is provided so that the force acting in the closing direction when the sub open / close door is closed can be transmitted to the cover portion, the sub open / close door is overlapped with the main open / close door and closed. Furthermore, the force acting on the main door can be transmitted to the cover portion via the sub door. Thereby, when the main opening / closing door is closed, a larger force can be received by the main opening / closing door. As a result, the opening area of the opening can be expanded while ensuring the rigidity when the door is closed more reliably.

  Further, the opening / closing door structure of the printing press according to the present invention is such that the sub opening / closing door rotates in the direction about the auxiliary opening / closing door rotation axis that acts in the closing direction when the auxiliary opening / closing door is closed. It is formed so that it can be transmitted to the cover part by changing its direction.

  In this invention, the force acting in the direction of closing the sub opening / closing door is formed so that it can be transmitted to the cover portion by changing the direction to the rotation direction around the rotation axis of the sub opening / closing door. On the other hand, the force acting in the closing direction can be more reliably transmitted to the cover portion via the sub opening / closing door. Thereby, when the main opening / closing door is closed, a larger force can be received by the main opening / closing door. As a result, the opening area of the opening can be expanded while ensuring the rigidity when the door is closed more reliably.

  In the opening / closing door structure of a printing press according to the present invention, the sub-opening / closing door is formed so that a force acting in a closing direction when the sub-opening / closing door is closed can be transmitted to the cover portion by surface contact. It is characterized by that.

  In this invention, since the sub opening / closing door is formed so as to be able to transmit the force acting in the closing direction to the cover portion by surface contact, the force acting in the closing direction with respect to the main opening / closing door is transmitted via the sub opening / closing door. When transmitting to the cover portion, a larger force can be transmitted. Thereby, when the main opening / closing door is closed, a larger force can be received by the main opening / closing door. As a result, the opening area of the opening can be expanded while ensuring the rigidity when the door is closed more reliably.

  Further, the opening / closing door structure of the printing press according to the present invention is characterized in that the cover portion has a sub opening / closing door support portion that receives a force acting in a closing direction when the sub opening / closing door is closed. To do.

  In this invention, since the cover portion is provided with the sub opening / closing door support portion that receives the force acting in the closing direction with respect to the sub opening / closing door, when the force acting on the sub opening / closing door is received by the cover portion, You can receive great power. As a result, a larger force can be received when receiving the force acting in the closing direction with respect to the main opening / closing door at the cover portion via the sub opening / closing door. A large force can be received at the main door. As a result, the opening area of the opening can be expanded while ensuring the rigidity when the door is closed more reliably.

  Further, the open / close door structure of the printing press according to the present invention is characterized in that the cover portion has a main open / close door support portion that receives a force acting in a closing direction when the main open / close door is closed. To do.

  In this invention, since the main opening / closing door support part that receives the force acting in the closing direction with respect to the main opening / closing door is provided in the cover part, when receiving the force acting on the main opening / closing door by the cover part, You can receive great power. Thereby, when the main opening / closing door is closed, a larger force can be received by the main opening / closing door. As a result, the opening area of the opening can be expanded while ensuring the rigidity when the door is closed more reliably.

  In the printing door opening / closing door structure according to the present invention, the main opening / closing door rotation shaft and the auxiliary opening / closing door rotation shaft are formed in parallel with the rotation shafts of the first rotating cylinder and the second rotating cylinder. And are close to each other.

  In this invention, since the main opening / closing door rotation shaft and the auxiliary opening / closing door rotation shaft are close to each other, when both the main opening / closing door and the auxiliary opening / closing door are opened, both are opened in an overlapping manner. become. For this reason, since the main opening / closing door and the sub opening / closing door are located at one place in the opened state, the main opening / closing door and the auxiliary opening / closing door may obstruct the work even when performing maintenance work, etc. Can be suppressed as much as possible. As a result, it is possible to improve workability when the door is opened.

  Further, in the opening / closing door structure of the printing press according to the present invention, the first rotating drum is formed as an impression drum of the printing press, and the second rotating motion is formed as an intermediate drum of the printing press, The main opening / closing door rotation shaft and the sub opening / closing door rotation shaft are provided at positions close to the intermediate drum among the pressure drum and the intermediate drum.

  In this invention, since the main opening / closing door rotation shaft and the sub opening / closing door rotation shaft are provided at positions close to the intermediate body, when the main opening / closing door is opened and the sub opening / closing door is closed, The opening area on the impression cylinder side is increased while the sub opening / closing door is closed. For this reason, by setting this state when performing the maintenance work of the impression cylinder, the auxiliary opening / closing door can be used as a scaffold during the work while ensuring an opening area for performing the maintenance work. Further, when performing maintenance work on the intermediate cylinder, the opening can be greatly opened by opening the auxiliary opening / closing door. As a result, the workability when the door is opened can be improved more reliably.

  The opening / closing door structure of the printing press according to the present invention has an effect that the opening area of the opening can be enlarged while securing rigidity when the opening / closing door is closed.

  Embodiments of the door structure for a printing press according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a schematic view of a main part of a printing press having a door structure for a printing press according to an embodiment of the present invention. The printing machine 1 shown in the figure includes a plurality of printing apparatuses 2 that are units for performing predetermined printing on a sheet 70 conveyed from the upstream side, and further includes an impression cylinder 5 that is a first rotating cylinder, And an intermediate cylinder 10 as a second rotating cylinder. The impression cylinder 5 and the intermediate cylinder 10 are in contact with each other. The impression cylinder 5 and the intermediate cylinder 10 both have claws 7 and 12, and when the sheet 70 is conveyed from the upstream side of the printing apparatus 2 during operation of the printing press 1, It is formed so as to be able to print while being gripped by the claw 7 of the impression cylinder 5 at a position upstream of the contact portion 18 with the intermediate cylinder 10 in the rotation direction of the impression cylinder 5 and supported on the surface 6 of the impression cylinder 5. . Thereafter, the sheet 70 is transferred from the claw 7 of the impression cylinder 5 to the claw 12 of the intermediate cylinder 10 at the contact portion 18, and on the surface 11 of the intermediate cylinder 10 downstream of the contact portion 18 in the rotation direction of the intermediate cylinder 10. It is provided so that it can be conveyed to the next printing apparatus 2 in a supported state. A plurality of bar-shaped paper guides 15 formed in a shape along the surface 6 of the impression cylinder 5 are provided above the impression cylinder 5 in the same manner as in a conventional printing press.

  Further, above the impression cylinder 5 and the intermediate cylinder 10 when the printing press 1 is used, an opening / closing scaffold 40 that is a main opening / closing door and a knee stand 50 that is a sub opening / closing door are provided. Further, an open / close door connection cover portion 22 to which the open / close scaffold 40 and the knee stand 50 are connected is provided above the intermediate trunk 10. The opening / closing door connection cover part 22 is provided as a part of the cover part 20 that covers at least a part of the impression cylinder 5 and the intermediate cylinder 10. Further, above the impression cylinder 5, an impression cylinder upper stay 28, which is a main opening / closing door support portion formed to extend in the rotation axis direction of the impression cylinder 5, is provided. When the printing press 1 is operated, the opening / closing scaffold 40 is in a state where an end located on the opposite side of the opening / closing door connection cover 22 side is in contact with the impression cylinder upper stay 28.

  FIG. 2 is an AA arrow view of FIG. 3 is a BB arrow view of FIG. 4 and 5 are perspective views of the main opening / closing door, the sub opening / closing door, and the door connection cover portion shown in FIG. FIG. 6 is a perspective view of main parts of the door structure shown in FIG. The open / close scaffold 40 and the knee stand 50 provided as described above are both connected to the open / close door connection cover portion 22 so as to be rotatable with respect to the open / close door connection cover portion 22. More specifically, the open / close door connection cover portion 22 includes a scaffold support member 30 that is a sub open / close door support portion formed of a compact angle steel. The scaffold support member 30 has a scaffold support member upper portion 31 formed along a substantially horizontal direction, one of the two surfaces of the angle steel forming the scaffold support member 30, and the other surface. This surface is a scaffolding support member side portion 32 formed substantially along the vertical direction. The scaffold support member upper part 31 and the scaffold support member side part 32 are located on the upper end side of the scaffold support member side part 32, and the scaffold support member side part 32 is The scaffold support member upper portion 31 is located on the end side on the side where the impression cylinder 5 (see FIG. 1) is located. The scaffolding support member 30 is formed in this shape so as to extend in the rotation axis direction of the impression cylinder 5 and the intermediate cylinder 10.

  The open / close scaffold 40 is connected to the scaffold support member 30. Specifically, the open / close scaffold 40 is connected to the scaffold support member upper portion 31 by an open / close scaffold pivot hinge 61 formed in a hinge shape. For this reason, the opening / closing scaffold 40 is provided so as to be rotatable about the rotation axis of the opening / closing scaffold rotation hinge 61 formed in a hinge shape. That is, the opening / closing scaffold 40 is provided so as to be rotatable around the opening / closing scaffold rotation shaft 63 with the rotation shaft of the opening / closing scaffold rotation hinge 61 as the opening / closing scaffold rotation shaft 63 which is the main opening / closing door rotation shaft. ing. In this way, the open / close scaffold pivot hinge 61 that connects the open / close scaffold 40 and the scaffold support member 30 has the open / close scaffold pivot axis 63 parallel to the rotation axes of the impression cylinder 5 and the intermediate trunk 10. 40 and the scaffold support member 30 are connected.

  Similarly, the knee stand 50 is similarly connected to the scaffold support member 30. Specifically, the knee stand 50 is connected to the side portion 32 of the scaffold support member by a knee stand rotating hinge 62 formed in a hinge shape. Has been. For this reason, the knee mount 50 is provided so as to be rotatable about the rotation axis of the knee mount rotating hinge 62 formed in a hinge shape. That is, the knee table 50 rotates around the knee table rotation axis 64 with the rotation axis of the knee table rotation hinge 62 as the knee table rotation axis 64 which is the auxiliary opening / closing door rotation axis. It is provided as possible. As described above, the knee mount rotating hinge 62 that connects the knee mount 50 and the scaffold support member 30 has the knee mount rotating shaft 64 in a direction parallel to the rotation axes of the impression cylinder 5 and the intermediate cylinder 10. The knee stand 50 and the scaffold support member 30 are connected to each other.

  In addition, the open / close scaffold pivot hinge 61 has two open / close scaffold pivot hinges 61 located near both ends of the open / close scaffold 40 in the rotation axis direction of the impression cylinder 5 and the intermediate trunk 10, that is, in the width direction of the open / close scaffold 40. ing. Similarly, the knee mount rotating hinge 62 includes two knee mount rotating hinges 62 in the rotational axis direction of the impression cylinder 5 and the intermediate cylinder 10, that is, in the width direction of the knee mount 50. Located near both ends. Thereby, the opening / closing scaffold 40 and the knee stand 50 are connected to the opening / closing door connection cover portion 22 so as to be rotatable with respect to the opening / closing door connection cover portion 22. In addition, since both the opening / closing scaffold rotation hinge 61 and the knee stand rotation hinge 62 are connected to the scaffold support member 30, the opening / closing scaffold rotation shaft 63 and the knee support rotation shaft 64 are close to each other. ing.

  The open / close scaffold 40 has a flat plate-like shape, and has a flat surface portion 41 formed in a substantially rectangular shape. The two opening / closing scaffold rotation hinges 61 are connected to the vicinity of one side of the flat portion 41 formed in a substantially rectangular shape. An opening / closing scaffold reinforcing member 45 is provided on the surface of the flat surface portion 41 on the side where the knee mount 50 is located. The opening / closing scaffold reinforcing member 45 is formed in a U-shaped cross-section, the opening side end of the U-shaped shape is connected to the flat surface portion 41, and the opening / closing scaffold rotation It is formed to extend substantially parallel to the moving shaft 63. Further, a damper connection portion 46 to which a damper 65 (see FIG. 11) described later is connected is provided on the surface of the flat portion 41 on the side where the opening / closing scaffold reinforcing member 45 is provided.

  In addition, an opening / closing scaffold reinforcement 42 is provided at the end of the opening / closing scaffold 40 that is located on the opposite side of the end to which the opening / closing scaffold rotation hinge 61 is connected. The opening / closing scaffold reinforcing portion 42 is provided on a surface of the flat portion 41 of the opening / closing scaffold 40 that is located on the opposite side of the surface on which the opening / closing scaffold reinforcing member 45 is provided. Specifically, the opening / closing scaffold reinforcing portion 42 is formed in a box shape by folding the end portion of the flat portion 41 in the direction of the surface located on the opposite side of the surface on which the opening / closing scaffold reinforcing member 45 is provided. Is provided.

  Further, the knee stand 50 has a flat portion 51 that is flat and formed in a substantially rectangular shape, like the open / close scaffold 40. The two knee-placing table rotation hinges 62 are connected to the vicinity of one side of the flat portion 51 formed in a substantially rectangular shape. Moreover, the knee stand 50 has a side surface portion 52 formed by folding an outer peripheral portion in a direction opposite to the side where the open / close scaffold 40 is located. That is, the side surface portion 52 is provided on all sides formed on the flat surface portion 51 of the knee mount 50 formed in a substantially rectangular shape. In addition, the side portions 52 formed on the four sides of the flat portion 51 have different heights, and the side portions 52 of the side portion 52 located on the side to which the knee-placing table rotation hinge 62 is connected. The side surface portion 52 provided at the end located on the opposite side of the end on the side to which the knee-placing table turning hinge 62 is connected has the lowest height. Of the side surface 52, the side surface 52 that is located on the side to which the knee-placing table rotation hinge 62 is connected and is formed with the highest height is a side surface portion 53 on the connection side of the cover.

  A knee support reinforcing member 55 is provided on the surface of the flat part 51 of the knee support 50 that is located on the opposite side of the surface on which the open / close scaffold 40 is located. The knee support base reinforcing member 55 is formed in a U-shaped cross-section, the end of the opening side in the U-shaped shape is connected to the flat surface portion 51, and the knee support base It is formed so as to extend substantially parallel to the rotation shaft 64.

  Further, the knee stand 50 has a length in the forming direction of the opening / closing scaffold rotating shaft 63 and the knee stand rotating shaft 64, that is, the width of the knee stand 50 is narrower than the width of the opening / closing scaffold 40. The length of the opening / closing scaffold reinforcing member 45 provided in the opening / closing scaffold 40 is narrower. In addition, the knee mount 50 has a direction orthogonal to the width direction, that is, a side where the cover portion connection side surface portion 53 of the knee mount 50 is positioned, and a side surface facing the cover connection side surface portion 53. The length in the distance direction from the side where the portion 52 is provided is also shorter than the length of the opening / closing scaffold 40 in the same direction.

  FIG. 7 is an explanatory view showing a state in which the open / close scaffold and the knee stand shown in FIG. 1 are opened. FIG. 8 is a view taken along the line CC in FIG. In FIG. 8, the open / close scaffold 40 and the knee mount 50 are omitted in order to show a state in which the open / close scaffold 40 and the knee mount 50 are opened. The open / close scaffold 40 and the knee stand 50 are connected to the open / close door connection cover portion 22 as described above. The open / close door connection cover portion 22 is a part of the cover portion 20 that covers the impression cylinder 5 and the intermediate drum 10. It is provided as a part. Such a cover part 20 constitutes the printing press 1 and is fixed to a frame 25 provided as a strength member. For this reason, the open / close door connection cover portion 22 is also fixed to the frame 25 in the same manner as the other cover portions 20.

  The cover 20 has an opening 21 that is open to both the impression cylinder 5 and the intermediate cylinder 10. The opening 21 is opened in a substantially rectangular shape, and the size and shape thereof are substantially the same size and shape of the opening / closing scaffold 40. The open / close door connection cover portion 22 is provided near one side of the rectangle that is the shape of the opening 21. Therefore, on one side of the rectangle that is the shape of the opening portion 21, an opening / closing scaffold rotating hinge 61 and a knee stand rotating hinge 62 are provided.

  As a result, the opening / closing scaffold 40 that is pivotally connected to the cover portion 20 by the opening / closing scaffold pivot hinge 61 can open and close almost the entire opening 21 by pivoting about the opening / closing scaffold pivot shaft 63. Is provided. Further, the knee table 50 that is rotatably connected to the cover unit 20 by the knee table rotation hinge 62 rotates about the knee table rotation shaft 64 so that a part of the opening 21 is formed. It can be opened and closed. In addition, the opening / closing scaffold rotation hinge 61 and the knee stand rotation hinge 62 are provided near the intermediate body 10 among the pressure drum 5 and the intermediate body 10 that are in contact with each other. For this reason, the opening / closing scaffold rotating shaft 63 and the knee stand rotating shaft 64 are also provided at positions closer to the intermediate body 10 among the impression cylinder 5 and the intermediate body 10.

  In addition, an upper impression cylinder stay 28 is provided in the vicinity of the side opposite to the side where the opening / closing scaffolding rotation hinge 61 and the knee mount rotation hinge 62 are provided in the opening 21. The impression cylinder upper stay 28 protrudes inward of the opening 21 rather than the cover 20 that forms the opening 21. For this reason, when the opening / closing scaffold 40 connected to the cover part 20 is rotated by the opening / closing scaffold rotating hinge 61 and the opening 21 is closed, the opening / closing scaffold 40 closes the entire opening 21 at the same time. The vicinity of the end located on the side opposite to the end to which the opening / closing scaffold pivot hinge 61 is connected abuts on the impression cylinder upper stay 28 from above the impression cylinder upper stay 28 (see FIG. 1).

  The opening / closing door structure of the printing press 1 according to this embodiment is configured as described above, and the operation thereof will be described below. During the operation of the printing press 1 provided with such an opening / closing scaffold 40 and knee mount 50, the opening / closing scaffold 40 and knee mount 50 close the opening 21. When the opening / closing scaffold 40 and the knee stand 50 are closed in this way, the knee stand 50 is overlapped with the opening / closing scaffold 50 and closed. In both positions, the open / close scaffold pivot hinge 61 is connected to the scaffold support member upper portion 31 of the scaffold support member 30, and the knee stand pivot hinge 62 is the scaffold support member side portion 32 of the scaffold support member 30. Therefore, the open / close scaffold 40 is overlaid from the knee stand 50.

  Thus, when the opening / closing scaffold 40 and the knee stand 50 are overlapped and closed, the opening / closing scaffold 40 is an end portion located on the opposite side of the end portion to which the opening / closing scaffold rotating hinge 61 is connected. That is, the vicinity of the end portion where the opening / closing scaffold reinforcement 42 is provided abuts on the impression cylinder stay 28 from above the impression cylinder stay 28 and is supported by the impression cylinder stay 28. The knee stand 50 is supported by the scaffold support member 30 with the cover portion connection side surface portion 53 abutting against the scaffold support member side portion 32 of the scaffold support member 30.

  The cover 20 that covers the impression cylinder 5 and the intermediate cylinder 10 is used as a scaffold during maintenance work of the printing press 1. For this reason, during maintenance work of the printing press 1, an operator gets on the cover unit 20 or walks on the cover unit 20. Therefore, when the open / close scaffold 40 and the knee stand 50 are overlapped and closed, the operator can get on the open / close scaffold 40 or move on the open / close scaffold 40 during the maintenance work, like the cover unit 20. I walk.

  Here, one end of the open / close scaffold 40 is connected to the scaffold support member 30 by the open / close scaffold pivot hinge 61, and the vicinity of the end where the open / close scaffold reinforcement 42 is provided is supported by the stay on the impression cylinder 28. ing. Therefore, when the open / close scaffold 40 is closed, a load acting downward from the top of the open / close scaffold 40 as in the case where an operator rides on the open / close scaffold 40, that is, an action in the closing direction of the open / close scaffold 40. The force to be applied can be received by the scaffold support member 30 and the impression cylinder stay 28.

  When the open / close scaffold 40 is closed, the open / close scaffold 40 and the knee stand 50 are overlapped and closed. For this reason, the force acting in the direction of closing the open / close scaffold 40 is also transmitted to the knee stand 50. As described above, when the force acting in the closing direction of the open / close scaffold 40 is transmitted to the knee mount 50 with the open / close scaffold 40 closed, the knee mount 50 is centered on the knee mount rotating shaft 64. Since it is provided so as to be able to rotate, the force acting in the closing direction when the knee mount 50 is closed is transmitted to the cover unit 20 while changing its direction in the rotation direction around the knee mount rotation shaft 64. It is made possible.

  Specifically, when the knee mount 50 is closed, the force acting in the direction of closing the knee mount 50 changes the direction about 90 ° in the rotation direction around the knee mount rotation shaft 64. Then, it is transmitted from the cover part connection side surface part 53 to the scaffold support member side part 32. Here, when the cover part connection side surface part 53 and the scaffolding support member side part 32 abut, the cover part connection side surface part 53 and the scaffolding support member side part 32 abut by surface contact. For this reason, when the knee mount 50 is closed, the force acting in the closing direction on the knee mount 50 is transmitted from the cover connection side surface 53 to the scaffold support member side 32 by surface contact. The That is, the knee mount 50 is formed so that a force acting in the closing direction when the knee mount 50 is closed can be transmitted to the cover portion 20 by surface contact.

  FIG. 9 is an explanatory diagram showing a state in which the opening / closing scaffold shown in FIG. 1 is opened. FIG. 10 is a view taken along the line DD in FIG. FIG. 11 is a perspective view of an essential part of the door structure shown in FIG. In addition, since FIG. 10 shows the state in which the opening / closing scaffold 40 is opened, the opening / closing scaffold 40 is omitted. When the printing press 1 is in operation, it is necessary to carry out maintenance periodically or as necessary in order to perform stains with ink and maintenance. For example, since the impression cylinder 5 is printed in a state where the sheet 70 is supported on the surface 6 during printing, the ink easily adheres to the surface 6. For this reason, the impression cylinder 5 needs to be cleaned in order to remove ink adhering to the surface 6. When cleaning the impression cylinder 5, only the open / close scaffold 40 is opened and the knee-rest 50 is closed.

  Here, a damper 65 is connected to the damper connecting portion 46 in the opening / closing scaffold 40 as shown in FIG. The damper 65 has one end connected to the open / close scaffold 40 and the other end connected to the frame 25. Further, the damper 65 applies a biasing force to the opening / closing scaffold 40 in the direction in which the opening / closing scaffold 40 opens. For this reason, when the open / close scaffold 40 is opened, the open / close scaffold 40 is maintained in an open state. Further, when the open / close scaffold 40 is opened, the open / close scaffold 40 stops in an opened state of 90 ° or more, that is, the open / close scaffold 40 stops in a state inclined to the opposite side to the opening 21 side, so that it is more reliable. Is kept open.

  When cleaning the impression cylinder 5, only the open / close scaffold 40 is opened and the knee table 50 is closed, but the knee table rotation shaft 64 is provided between the impression cylinder 5 and the intermediate cylinder 10. It is provided at a position close to the intermediate body 10 at the upper side. For this reason, the knee stand 50 in the closed state is located at a position near the intermediate drum 10 above the impression drum 5 and the intermediate drum 10. As a result, even when the knee mount 50 is closed, the position of the opening 21 near the impression cylinder 5 is greatly opened. Therefore, the operator can clean the impression cylinder 5 from the opening 21 that is wide open. Furthermore, since the knee stand 50 is in a closed state, when the impression cylinder 5 is cleaned, the operator can place the knee on the knee stand 50 and perform the cleaning work.

  In other words, the knee table 50 is formed so that the force acting in the closing direction when the knee table 50 is closed can be transmitted to the cover unit 20 by surface contact. Can place the knee on the knee mount 50 and put the weight on the knee mount 50 for cleaning work. Thereby, since it becomes easy to reach a wide range of the impression cylinder 5, the wide range of the impression cylinder 5 can be easily cleaned.

  FIG. 12 is a perspective view of main parts of the door structure shown in FIG. When the maintenance of the intermediate body 10 is performed, such as when adjusting the claws 12 of the intermediate body 10, both the opening / closing scaffold 40 and the knee stand 50 are opened (FIGS. 7 and 12). Thus, by opening the knee stand 50 together with the opening / closing scaffold 40, the opening 21 is also largely opened near the upper portion of the intermediate trunk 10. Thereby, it becomes easy to perform the maintenance work of the intermediate body 10. Further, when both the opening / closing scaffold 40 and the knee stand 50 are opened as described above, the knee stand 50 stops in contact with the opening / closing scaffold 40.

  Here, when the open / close scaffold 40 is opened, the open / close scaffold 40 can be maintained in the open state as described above, and the open / close scaffold pivot hinge 61 is located on the scaffold support member upper portion 31 of the scaffold support member 30. The knee support table rotation hinge 62 is connected to the scaffold support member side portion 32 of the scaffold support member 30. For this reason, since the knee-placing table rotation shaft 64 is positioned closer to the opening 21 than the opening / closing scaffold rotation shaft 63, both the opening / closing scaffold 40 and the knee mounting table 50 are opened, When brought into contact with the open / close scaffold 40, the knee stand 50 opens 90 ° or more, and leans against the open / close scaffold 50. Therefore, the knee mount 50 is maintained in an open state.

  The open / close door structure of the printing press 1 is provided with an open / close scaffold 40 capable of opening / closing the entire opening 21 opened to both the impression cylinder 5 and the intermediate cylinder 10, and a part of the opening 21 is provided. A knee stand 50 that is opened and closed and overlapped with the opening and closing scaffold 40 is provided. For this reason, when the opening / closing scaffold 40 and the knee stand 50 are overlapped and closed, the strength of the portion provided with the knee stand 50 is improved, so that rigidity can be ensured. Moreover, since the knee-rest 50 which acts as a member which ensures rigidity by overlapping with the opening-and-closing scaffold 40 is formed so that a part of opening part 21 can be opened and closed, it can be opened and closed as needed. it can. For example, when maintenance work for the impression cylinder 5 or the intermediate cylinder 10 is not required, the knee mount 50 is closed when the large opening 21 is not required, and when the large opening 21 is required, the knee mount is set. By opening the table 50, the opening area of the opening 21 can be increased. As a result, the opening area of the opening 21 can be expanded while ensuring the rigidity when the opening / closing scaffold 40 as the opening / closing door is closed.

  Moreover, since the outer peripheral part of the knee stand 50 is folded, the rigidity of the knee stand 50 alone can be improved. For this reason, when closing the open / close scaffold 40, it is possible to improve rigidity when the open / close scaffold 40 is closed by overlapping the knee mount 50 and closing it. As a result, the opening area of the opening 21 can be expanded while ensuring the rigidity when the opening / closing scaffold 40 is closed more reliably.

  Further, since the knee table 50 is provided so that a force acting in the closing direction when the knee table 50 is closed can be transmitted to the cover unit 20, the knee table 50 is overlapped with the open / close scaffold 40 and closed. In such a case, the force acting on the opening / closing scaffold 40 can be transmitted to the cover portion 20 via the knee-stand 50. Thereby, when the open / close scaffold 40 is closed, a larger force can be received by the open / close scaffold 40. As a result, the opening area of the opening 21 can be expanded while ensuring the rigidity when the opening / closing scaffold 40 is closed more reliably.

  In addition, since the force acting in the direction of closing the knee table 50 is formed so as to be able to be transmitted to the cover unit 20 by changing the direction in the rotation direction around the knee table rotation shaft 64, the open / close scaffold 40 The force acting in the closing direction can be more reliably transmitted to the cover unit 20 via the knee-rest 50. Thereby, when the open / close scaffold 40 is closed, a larger force can be received by the open / close scaffold 40. As a result, the opening area of the opening 21 can be expanded while ensuring the rigidity when the opening / closing scaffold 40 is closed more reliably.

  Further, since the knee mount 50 is formed so that a force acting in the closing direction can be transmitted to the cover portion 20 by surface contact, the force acting in the closing direction with respect to the open / close scaffold 40 is applied to the knee mount 50. When transmitting to the cover part 20 via, a bigger force can be transmitted. Thereby, when the open / close scaffold 40 is closed, a larger force can be received by the open / close scaffold 40. As a result, the opening area of the opening 21 can be expanded while ensuring the rigidity when the opening / closing scaffold 40 is closed more reliably.

  Further, since the scaffolding support member 30 that receives the force acting in the closing direction with respect to the knee mount 50 is provided on the cover portion 20, when receiving the force acting on the knee mount 50 at the cover portion 20, You can receive more power. As a result, a larger force can be received when receiving the force acting in the closing direction with respect to the opening / closing scaffold 40 by the cover unit 20 via the knee stand 50, and therefore when the opening / closing scaffold 40 is closed. A larger force can be received by the opening / closing scaffold 40. As a result, the opening area of the opening 21 can be expanded while ensuring the rigidity when the opening / closing scaffold 40 is closed more reliably.

  In addition, since the cover section 20 is provided with the impression cylinder stay 28 that receives a force acting in the closing direction with respect to the opening / closing scaffold 40, when the cover section 20 receives a force acting on the opening / closing scaffold 40, You can receive great power. Thereby, when the open / close scaffold 40 is closed, a larger force can be received by the open / close scaffold 40. As a result, the opening area of the opening 21 can be expanded while ensuring the rigidity when the opening / closing scaffold 40 is closed more reliably.

  In addition, since the opening / closing scaffold rotating shaft 63 and the knee stand rotating shaft 64 are close to each other, when both the opening / closing scaffold 40 and the knee stand 50 are opened, both are opened in a stacked state. Become. For this reason, since the open / close scaffold 40 and the knee stand 50 are located at one place in the open state, the open / close scaffold 40 and the knee stand 50 are obstructive to work even when maintenance work is performed. It can be suppressed as much as possible. As a result, it is possible to improve workability when the opening / closing scaffold 40 is opened.

  In addition, since the opening / closing scaffold rotating shaft 63 and the knee mount rotating shaft 64 are provided at positions close to the intermediate trunk 10, when the opening / closing scaffold 40 is opened and the knee mount 50 is closed. While the knee mount 50 is closed, the opening area on the impression cylinder 5 side is increased. For this reason, when the maintenance work of the impression cylinder 5 is performed, this state can be used, and the knee table 50 can be used as a scaffold during the work while ensuring an opening area for the maintenance work. Moreover, when performing the maintenance operation | work of the intermediate | middle trunk | drum 10, the opening part 21 can be opened largely by opening the knee stand 50 also. As a result, the workability when the opening / closing scaffold 40 is opened can be improved more reliably.

  The first rotary cylinder is the impression cylinder 5 and the second rotary cylinder is the intermediate cylinder 10. However, the first rotary cylinder and the second rotary cylinder may be other rotary cylinders. Even if the first rotary drum and the second rotary drum are rotary drums other than the impression drum 5 and the intermediate drum 10, the opening 21 opens to the first rotary drum and the second rotary drum, and the open / close scaffold 40 Or the knee stand 50 should just be provided so that this opening part 21 can be opened and closed. Thereby, the opening area of the opening part 21 can be expanded, ensuring the rigidity at the time of closing the opening / closing scaffold 40.

  As described above, the opening / closing door structure of the printing press according to the present invention is useful for the opening / closing door structure of a sheet-fed printing press, and in particular, an opening that opens to the impression cylinder and the intermediate drum of the printing press. Suitable for open doors that open and close.

It is the principal part schematic of the printing machine provided with the door structure of the printing machine which concerns on the Example of this invention. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. FIG. 4 is a perspective view of a main opening / closing door, a sub opening / closing door, and a door connection cover portion shown in FIG. 3. FIG. 4 is a perspective view of a main opening / closing door, a sub opening / closing door, and a door connection cover portion shown in FIG. 3. It is a principal part perspective view of the opening-and-closing door structure shown in FIG. It is explanatory drawing which shows the state which the opening-and-closing scaffold and knee stand shown in FIG. 1 opened. It is CC arrow line view of FIG. It is explanatory drawing which shows the state which the opening-and-closing scaffold shown in FIG. 1 opened. FIG. 10 is a DD arrow view of FIG. 9. It is a principal part perspective view of the door structure shown in FIG. It is a principal part perspective view of the door structure shown in FIG. It is a schematic block diagram of the conventional printing apparatus. It is the E section detail drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing machine 2,82 Printing apparatus 5,84 Pressure drum 6,91 Surface 7,94 Claw 10,85 Intermediate cylinder 11,92 Surface 12,95 Claw 15,88 Paper guide 18,98,99 Contact part 20 Cover part 21 Opening 22 Opening / Closing Door Connection Cover 25 Frame 28 Impressor Upper Stay (Main Opening Door Support)
30 Scaffolding support member (sub-opening / closing door support)
31 Upper part of scaffolding support member 32 Side part of scaffolding support member 40 Opening / closing scaffolding (main opening / closing door)
41 Plane part 42 Opening and closing scaffolding reinforcement part 45 Opening and closing scaffolding reinforcement member 46 Damper connection part 50 Knee stand (sub-opening and closing door)
51 Plane part 52 Side part 53 Cover part connection side side part 55 Knee stand reinforcement member 61 Opening / closing scaffolding pivot hinge 62 Knee stand pivoting hinge 63 Opening / closing scaffold pivoting axis 64 Knee stand pivoting axis 65 Damper 70, 82 Sheet 86 Pressure cylinder side opening / closing door 87 Intermediate cylinder side opening / closing door 89 Support beam 93 Pin 96 Beam 97 Space 100 Ink roller group 101 Plate cylinder 102 Printing plate 103 Blanket cylinder

Claims (9)

A first rotating cylinder and a second rotating cylinder which are in contact with each other;
A cover portion covering at least a part of the first rotating drum and the second rotating drum;
An opening formed in the cover portion and open to both the first rotating drum and the second rotating drum;
A main opening / closing door capable of opening and closing the entire opening by rotating about a main opening / closing door rotation axis;
A sub-opening / closing door that is formed so as to be able to open / close a part of the opening by rotating about a sub-opening / closing door rotation shaft and is closed to overlap the main opening / closing door when the main opening / closing door is closed. ,
An opening / closing door structure for a printing press.   The opening / closing door structure of a printing press according to claim 1, wherein an outer peripheral portion of the sub opening / closing door is folded back. The main opening and closing door and the sub opening and closing door are provided so as to be opened and closed in the same direction,
The opening / closing of a printing press according to claim 1 or 2, wherein the sub opening / closing door is formed so as to be able to transmit a force acting in a closing direction when the sub opening / closing door is closed to the cover portion. Door structure.   The sub opening / closing door is configured to transmit a force acting in a closing direction when the sub opening / closing door is closed to a direction of rotation about the sub opening / closing door rotation axis and to be transmitted to the cover portion. The door structure for a printing press according to claim 3, wherein   5. The printing according to claim 3, wherein the sub opening / closing door is formed so that a force acting in a closing direction when the sub opening / closing door is closed can be transmitted to the cover portion by surface contact. Machine door structure.   The said cover part has a sub opening / closing door support part which receives the force which acts on the closing direction at the time of closing the said sub opening / closing door, The any one of Claims 3-5 characterized by the above-mentioned. Opening / closing door structure of printing press.   The said cover part has a main opening-and-closing door support part which receives the force which acts on the closing direction at the time of closing the said main opening-and-closing door, The any one of Claims 1-6 characterized by the above-mentioned. Opening / closing door structure of printing press.   The main opening / closing door rotation shaft and the sub opening / closing door rotation shaft are formed in parallel to the rotation shafts of the first rotating cylinder and the second rotating cylinder and are close to each other. The door structure for a printing press according to any one of claims 1 to 7. The first rotary cylinder is formed as an impression cylinder of the printing press;
The second rotational movement is formed as an intermediate cylinder of the printing press;
9. The printing according to claim 8, wherein the main opening / closing door rotation shaft and the sub opening / closing door rotation shaft are provided at positions closer to the intermediate cylinder among the impression cylinder and the intermediate cylinder. Machine door structure.

Images