JPH0723549U - Paper transport mechanism for small printing machines - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the operation lever is operated while the paper is being conveyed, the lock of the paper will not be disengaged to prevent the paper from being conveyed to the printing position. To improve printing safety and operability. [Structure] When printing is started, the operation lever 124 is moved from the stop position S to the feed position F. As a result, the finger 103 is positioned at the locking position K by the cam mechanism 110 via the link mechanism 120, and the slider 1
The printing paper P stocked in the stacker is locked at the time of exiting 00, and the paper P locked at the time of advancing the slider 100 is conveyed to the printing position. In the process of transporting this paper,
Even if the operating lever 124 is accidentally returned from the feed position F to the stop position S, the rod 131 of the movement blocking mechanism 130 is moved from the movement permitting position M to the movement blocking position N, whereby the link mechanism 120 is stopped. Piece 136
Stops against the rod 131, so that the operation lever 124 is prevented from moving to the stop position S.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper transport mechanism for a small printing machine that can easily print on small paper such as business cards and postcards.

[0002]

[Prior art]

 Generally speaking, for example, an offset type small printing machine will be described as a small printing machine.A stacker for stocking printing paper is provided on the front side of the base, and the paper is conveyed from the stacker to the printing position one by one by a paper conveyance mechanism. The image of the image transferred from the plate cylinder onto the blanket covered on the outer side of the blanket drum is rotated by rotating a blanket drum rotatably provided on the base having an axis orthogonal to the paper transport direction. Ink is printed on the paper conveyed to the above-mentioned conveyance position.

Conventionally, the above-described paper transport mechanism has a slider which is provided below the stacker and which is driven to move back and forth. The edge of the printing paper stocked on this slider is locked and the slider is advanced when it advances. Fingers are provided to convey the locked paper to the printing position. Then, in order to convey and print the paper only when necessary, either the locked position where the finger can be locked to the paper or the non-locked position where the finger cannot be locked by operating the operation lever. I am trying to position it.

[0004]

[Problems to be solved by the device]

 By the way, in the paper transport mechanism of the conventional small-sized printing press described above, the fingers are positioned at the locking position to lock the paper and the slider advances, that is, during the paper transport. , If the operating lever is operated by mistake and the finger is located at the non-locking position, the paper will be released from the lock, and the paper will stop in the middle of transportation and will not be transported to the printing position. However, there was a problem that the ink on the blanket adhered to the machine parts other than the paper, which hindered subsequent printing.

Therefore, an object of the present invention is to prevent the sheet from being disengaged even if the operation lever is operated while the sheet is being conveyed, so that the sheet is not conveyed to the printing position. This is to provide a paper transport mechanism for a small-sized printing machine, in which printing safety and operability are improved.

[0006]

[Means for Solving the Problems]

 To solve such a problem, a paper transport mechanism of a small-sized printing machine according to the present invention is provided with a slider that is provided on the front side of a base and is provided below a stacker that stacks and stacks sheets and that is driven to move back and forth. It is provided on the slider so that it can move to the locking position where the edges of the stocked printing paper can be locked and the non-locking position where the paper cannot be locked.When it is in the locking position, it is stocked when the slider exits. In a paper transport mechanism of a small-sized printing machine, which has a finger that locks the edge of the printing paper and transports the locked paper when the slider advances, to the printing position, A cam mechanism that is positioned in either direction, a feed position that drives the cam mechanism to place the fingers in the locked position, and a cam mechanism that drives the fingers to the unlocked position to stop the paper feed Provided with a link mechanism having an operation lever movable to two stop positions, and a movement preventing mechanism for preventing the link mechanism from moving from the feed position to the stop position during the advance stroke of the slider. Is.

Then, if necessary, the movement prevention mechanism is provided so as to be capable of advancing and retreating along the movement direction of the slider, and moves from the admissible position to allow the movement of the link mechanism and the retracted position from the feed position of the link mechanism. A rod that is movable to two positions, a movement blocking position that blocks the movement to the stop position, a pair of locking portions that are provided on the printing position side and the stacker side of the rod and are spaced apart from each other, and a slider. At the end of the slider advancing stroke, the rod is locked at the print position side locking portion to set the rod in the movement permitting position, and at the slider retracting stroke, locked at the stacker side locking portion to move the rod. And a sub-slider that is set to the blocking position.

[0008]

[Action]

 According to this means, when printing is started, the operation lever is moved from the stop position to the feed position. As a result, the fingers are positioned at the locking position by the cam mechanism, the printing paper that is stocked when the slider retreats is locked, and the paper that is locked when the slider advances is conveyed to the printing position. Even if the operating lever is mistakenly returned from the feed position to the stop position in the paper transporting process, the movement preventing mechanism prevents the link mechanism from moving from the feed position to the stop position. Therefore, since the fingers are not located at the non-locking position, it is possible to prevent the paper from being unlocked and stopped during the transportation, and the paper cannot be transported to the printing position.

[0009]

【Example】

 Hereinafter, a sheet conveying mechanism of a compact printing machine according to an embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 9, the paper transport mechanism H according to the embodiment is applied to an offset type small printing machine.

As shown in FIGS. 7 to 9, reference numeral 1 is a base having side frames 3 on both sides of a base plate 2. A motor 4 for driving the apparatus is provided below the base plate 2. Reference numeral 5 is a cover for covering the device. A stacker 6 for paper P is provided on the front side of the base 1 and stocks small printing paper P such as business cards. As shown in FIG. 6, the stacker 6 is formed in the shape of a rectangular tube that is supported by a support base 1a at the front of the base 1 and that stacks the sheets P to accommodate them. An opening 6a for feeding out the paper P is formed on the front side of the lower portion of the stacker 6.

As shown in FIGS. 1 to 6, the paper transport mechanism H according to the embodiment feeds the print paper P stacked on the stacker 6 to the rear printing position. In the paper transport mechanism H, 100 is a slider that is provided below the stacker 6 in the support base 1a and is driven to move back and forth. The slider 100 is slidably provided on a guide shaft 102 provided on the support base 1a, and is connected to a link 101 that moves back and forth by using the motor 4 as a drive source. Be moved.

Reference numeral 103 denotes a finger capable of locking the edge of the stocked printing paper P, and a pair of fingers are provided on the finger block 104. The finger block 104 is arranged so that the finger 103 can move to a locking position K at which the edge of the stocked printing paper P can be locked and a non-locking position L at which the paper P cannot be locked. It is rotatably provided on the slider 100. Then, when the finger 103 is located at the locking position K, the finger 103 locks the edge of the stocked printing paper P when the slider 100 retreats, and the paper P locked by the slider 100 advancing to the printing position. Transport. Reference numeral 105 is a coil spring that constantly urges the finger block 104 in the locking position K direction of the finger 103, 106 is a bolt that regulates the upper limit of the locking position K, and 107 is a fixing screw that fixes the bolt.

Reference numeral 110 denotes a cam mechanism that positions the finger 103 at either the locking position K or the non-locking position L. This cam mechanism 110 is rotatably provided on the base 1 and has a lower portion 111 and a higher portion 112, and an axis line along the moving direction of the slider 100, and a cam shaft 113 provided on the finger block 104. And a cam follower 114 which pushes the finger block 104 against the biasing force of the coil spring 105 to rotate the finger block 104 to position the finger 103 at the non-locking position L.

Reference numeral 120 denotes a link mechanism provided on the front side of the support base 1 a, and a first link 121 fixed to an end portion of the cam shaft 113 of the cam mechanism 110 and a rotatably connected to the first link 121. A second link 122 extending in a direction orthogonal to the cam shaft 113, and an operation lever 124 rotatably supported by the base 1 via a support plate 123 and rotatably connected to the second link 122. It has and. Then, the link mechanism 120 drives the cam shaft 113 of the cam mechanism 110 by the turning operation of the operation lever 124 to set the finger 103 to the locking position K and feed the paper P, and the feed position F. The cam shaft 113 can be driven to move the finger 103 to the non-locking position L and to the stop position S for stopping the feeding of the paper P.

Reference numeral 130 denotes a movement preventing mechanism that prevents the link mechanism 120 from moving from the feed position F to the stop position S during the advance stroke of the slider 100. In the movement prevention mechanism 130, 131 is a rod erected on a erection plate 132 in the support base 1a so as to be able to advance and retreat along the movement direction of the slider 100. The movement permission allows the movement of the link mechanism 120 to be advanced. It is possible to move to two positions, a position M and a movement blocking position N that prevents the link mechanism 120 from moving from the feed position F to the stop position S by exiting. Numerals 133 and 134 are a pair of locking portions provided on the printing position side and the stacker 6 side of the rod 131, respectively, which are spaced apart from each other. Reference numeral 135 denotes a sub-slider provided on the slider 100 with a rod 131 slidably inserted therein. The sub-slider 135 is engaged with the engaging portion 133 on the printing position side at the end of the advance stroke of the slider 100 and the rod 131. Is set to the movement permitting position M, and the rod 131 is set to the movement preventing position N by being locked to the locking portion 134 on the stacker 6 side in the retreating stroke of the slider 100.

In the movement preventing mechanism 130, 136 is a stop piece which is provided on the second link 122 of the link mechanism 120 and stops against the rod 131. The rotation direction of the stopper 136 is regulated by a spring 137 so that the stopper 136 can rotate in one direction allowing the movement to the feed position F. That is, when the link mechanism 120 strikes the rod 131 when the link mechanism 120 moves from the stop position S to the feed position F, the stopper piece 136 rotates (in the R1 direction in FIGS. 1 and 2). When moving from the feed position F to the stop position S and hitting the rod 131 when moving from the feed position F to the stop position S, rotation (R2 direction in FIGS. 1 and 3) is restricted. The link mechanism 120 is prevented from moving from the feed position F to the stop position S.

Reference numeral 140 denotes a holding mechanism that holds the rod 131 at the movement blocking position N. The holding mechanism 140 includes a pair of leaf springs 141 that holds the rod 131 and elastically contacts the rod 131, and slides on the rod 131 when the sub-slider 135 is advanced. The rod 131 is pressed so as not to easily move to the movement permitting position M by the dynamic resistance, and does not hinder the movement of the rod 131 due to the locking of the sub-slider 135 to the engaging portions 133 and 134.

Next, another configuration of the compact printing machine will be described. As shown in FIGS. 7 to 9, 10 is a blanket drum, which is provided on a drum shaft 11 orthogonal to the transport direction R of the paper P. The drum shaft 11 is rotatably provided on the side frame 3. The drum shaft 11 is rotationally driven by the belt transmission mechanism 12 using the motor 4 as a drive source. A sheet-shaped blanket 13 is detachably covered on the outer side of the blanket drum 10. Then, by rotating the blanket drum 10, the ink transferred onto the blanket 13 is printed on the paper P that is sent. Reference numeral 14 is a support roller for pressing the paper P against the blanket drum 10. The support roller 14 is moved backward by the link mechanism 15 so as not to come into contact with the blanket drum 10 when idling. Reference numeral 16 denotes a gear for transmitting rotation to a transfer mechanism T described later, which is fixed to the blanket drum 10.

As shown in FIG. 10, the blanket drum 10 is rotatable with respect to the drum shaft 11. Reference numeral 210 denotes a blanket position adjusting mechanism for finely rotating the blanket drum 10 with respect to the drum shaft 11 to adjust the rotating position. In the blanket position adjusting mechanism 210, a pin 212 is projected on a fixed body (not shown) fixed to the drum shaft 11 in parallel with the drum shaft 11, and a recess 213 that encloses the projected pin 212 on the blanket drum 10. And a pair of set screws 214 for pressing the pin 212 from both sides of the drum shaft 11 are screwed into the wall portion forming the recess 213. Then, by moving the set screw 214 forward and backward, the pin 212 is pressed, the relative positional relationship between the drum shaft 11 and the blanket drum 10 is adjusted, and the printing position of the image on the blanket 13 with respect to the paper P is adjusted. It is something. That is, when the blanket drum 10 moves to the A side, the printing position advances with respect to the paper P, and when it moves to the B side, the printing position lags with respect to the paper P. The blanket drum 10 described above is provided with a fixing screw for fixing the blanket drum 10 to the drum shaft 11.

Returning to FIG. 6, reference numeral 220 denotes a timing adjusting mechanism that adjusts the locking timing of the fingers 103 of the slider 100 with respect to the paper P and finely adjusts the print position of the image on the blanket 13 with respect to the paper P. The timing adjusting mechanism 220 has a rotation screw 221 that has an axis line in the front and rear direction and is rotatably provided on the slider 100, and a rotation screw 221 that is connected to the link 101 that moves back and forth and screwed into the rotation screw 221. The connecting portion 222 that moves relatively in the front-back direction, the spline shaft 224 that is inserted into the spline bearing 223 provided on the rotary screw 221, and the knob 225 that is provided at the front part of the base 1 and that rotates the spline shaft 224. It consists of and. When the knob 225 is rotated and the slider 100 is moved toward the blanket drum 10, the timing of locking the paper P is advanced, so the image of the blanket 13 is printed with a delay and moves away from the blanket drum 10. When the sheet P is moved, the locking timing of the sheet P is delayed, so that the image on the blanket 13 is advanced and printed.

As shown in FIGS. 7 to 9, T is a transfer mechanism for transferring the ink to the blanket 13 of the blanket drum 10 which is composed of a set of the plate cylinder cassette 20, the ink application cassette 30 and the ink supply cassette 40. Is. In the embodiment, two sets of this transfer mechanism T are provided, and the left side in FIG. 8 transfers the first color to form the image of the first color on the blanket 13 and the right side transfers the second color to the blanket 13. It forms the map of the color.

As shown in FIGS. 11 and 12, the plate cylinder cassette 20 is detachably attached with a sheet-shaped resin printing plate 21, and the ink on the printing plate 21 is attached to the blanket 13 of the blanket drum 10. And a plate cylinder holder 23 that rotatably supports the plate cylinder 22 from both sides via a plate cylinder shaft 25. The plate cylinder 22 is detachably attached to the side frame 3. . Reference numeral 24 is a gear that meshes with the gear 16 of the blanket drum 10 and rotates the plate cylinder shaft 25 of the plate cylinder 22 in synchronization with the rotation of the blanket drum 10. The gear 24 is fixed to the plate cylinder shaft 25. Further, the printing plate 21 is provided with characters, marks and the like formed in a convex shape.

As shown in FIG. 12, the plate cylinder 22 is rotatable with respect to the plate cylinder shaft 25. Reference numeral 230 denotes a plate cylinder position adjusting mechanism for finely rotating the plate cylinder 22 with respect to the plate cylinder shaft 25 to adjust the rotating position. In the plate cylinder position adjusting mechanism 230, a pin 231 is provided on the gear 24 in parallel with the plate cylinder shaft 25, and a recess 232 is formed on the plate cylinder 22 for accommodating the projecting pin 131, and the recess 232 is formed. A pair of set screws 233 for pressing the pins 231 from both sides of the plate cylinder shaft 25 are screwed into the wall portion of the plate cylinder 251. Then, as the set screw 233 moves back and forth, the pin 231 is pressed to adjust the relative positional relationship between the plate cylinder shaft 25 and the plate cylinder 22. Now, the rear side of the plate cylinder cassette 20 (the plate cylinder cassette 20 on the right side in FIG. 8) will be described. In this adjustment, the gear 24 meshes with other parts and does not move. Therefore, as shown in FIG. When 233 is adjusted, the plate cylinder 22 moves with respect to the plate cylinder axis 25, that is, when the plate cylinder 22 moves to the A side, the mapping of the second color advances to the first color on the blanket 13 and the B side moves. When moved, the mapping of the second color is delayed with respect to the first color. The plate cylinder 22 is provided with a fixing screw for fixing the plate cylinder 22 to the plate cylinder shaft 25.

Returning to FIG. 7 to FIG. 9, the ink application cassette 30 includes an ink application roller 31 including a set of large and small rollers that apply ink to the printing plate 21 on the plate cylinder 22, and an ink application roller 31. And a roller holder 32 that rotatably supports the roller from both sides, and is detachably attached to the side frame 3. Reference numeral 33 is a gear for rotating the rotary shaft 34 of the ink coating roller 31 in synchronization with the rotation of the plate cylinder 22.

The ink supply cassette 40 includes an ink storage section 41 that stores ink and an ink supply roller 42 that draws out the ink from the ink storage section 41 and supplies the ink to the ink application roller 31 in appropriate amounts. It is designed to be removable.

Further, the side frame 3 of the base 1 is provided with two guide portions 50 that guide the two transfer mechanisms T through the support bodies 60 so that they can be inserted and removed. The guide portion 50 guides the plate cylinder cassette 20, the ink application cassette 30, and the ink supply cassette 40 from both sides, and a pair of parallel rails 51 are arranged so as to move in the radial direction of the blanket drum 10. , Provided on both side frames 3.

The support body 60 is movably provided between the rails 51 of the guide portion 50, and a slide contact plate 61 that slide-contacts the side frame 3, and a rail of the guide portion 50 that is formed to rise to the left and right of the slide contact plate 61. It is composed of a side plate 62 which is in sliding contact with 51, and a receiving portion 69 which receives the plate cylinder cassette 20, the ink application cassette 30, and the ink supply cassette 40 in order. The support 60 is constantly urged toward the blanket drum 10 by a spring 63. Reference numeral 64 denotes a protrusion projecting from the side plate of the support body 60 and facing a notch 65 provided in the rail 51, and limits the moving range of the support body 60 in the range of the notch 65.

Reference numeral 66 is a stopper that supports the lower end of the plate cylinder cassette 20. The stopper 66 can be slightly moved in the moving direction of the support body 60 by adjusting the knob 67, and this movement causes the contact pressure between the blanket 13 of the blanket drum 10 and the printing plate 21 on the plate cylinder 22. It also has the function of adjusting.

Reference numeral 70 denotes a moving mechanism that moves the support 60 in a direction in which the support 60 is separated from the blanket drum 10. This moving mechanism 70 is provided with a cam shaft 71 that lifts the lower end 60a of the support 60 by operating the handle, and this lifting separates the printing plate 21 on the plate cylinder 22 from the blanket 13 of the blanket drum 10, so it is unnecessary. This prevents the transfer of various inks and prevents the blanket 13 from becoming dirty.

In FIGS. 2, 5 and 6, reference numeral 240 denotes a paper positioning device that positions the left and right positions of the paper P in the stacker 6 and adjusts the left and right printing positions of the image on the blanket 13 with respect to the paper P. Is. The sheet positioning device 240 includes a pair of contact plates 241 which are provided in the stacker 6 so as to face each other so as to be able to move forward and backward, and contact the left and right sides of the sheet P respectively. A rod 242 is provided on the back surface of one of the contact plates 241, and the rod 242 is slidably inserted into a bearing 243 fixed to the stacker 6. A fixing screw 244 fixes the rod 242 to the bearing 243. A screw rod 245 is provided on the back surface of the other contact plate 241, and the screw rod 245 is screwed into a nut 246 that is manually rotated. The nut 246 is rotatably held by a holder 247 fixed to the stacker 6. Reference numeral 248 is a positioning bolt that is screwed into the holding body 247 and fits into a groove 249 formed on the outer periphery of the nut 246 to rotate the nut 246 at a predetermined position, and 250 is a fixing screw that fixes the nut 246 to the holding body 247.

Further, as shown in FIG. 6, reference numeral 251 denotes a pressing plate that presses the rear end of the paper P, and a rod 252 is provided on the back surface of the pressing plate 251 so that the pressing plate 251 can move according to the size of the paper P. Is provided, and the rod 252 is slidably inserted in a bearing 253 fixed to the stacker 6. A fixing screw 254 fixes the rod 252 to the bearing 253.

Therefore, according to the paper transport mechanism H of the compact printing machine according to this embodiment, printing is performed as follows. Now, a case of two-color printing in which black characters, two-color characters of black and red, and two-color marks of black and red are printed on a business card will be described. The printing plate 21 for black and the printing plate 21 for red are prepared in advance.

First, the two transfer mechanisms T, which are a set of the plate cylinder cassette 20, the ink application cassette 30, and the ink supply cassette 40, are removed from the guide section 50, and as shown in FIG. The black printing plate 21 is mounted on the plate cylinder 22 of No. 1, and the red printing plate 21 is mounted on the plate cylinder 22 of the other plate cylinder cassette 20. Since the printing plate 21 can be mounted on the plate cylinder cassette 20 outside the apparatus, the printing plate 21 can be mounted in a wide space, and the mounting workability is improved accordingly. Further, one ink supply cassette 40 is filled with black ink, and the other ink supply cassette 40 is filled with red ink.

Next, the plate cylinder cassette 20, the ink application cassette 30, and the ink supply cassette 40 are sequentially inserted into the support 60 provided on the guide portion 50. In this case, it suffices to insert each cassette into the support 60, so that the setting can be performed very easily. Further, the sheets P are stacked and placed in the stacker 6. At this time, the sheet positioning device 240 loosens the fixing screw 244 to widen one of the contact plates 241 and then loosens the fixing screw 250 to rotate the nut 246 to rotate the other contact plate 241 to an appropriate position. Set to position. In this state, one of the contact plates 241 is brought into contact with the paper P, and both fixing screws 244 and 250 are fixed to position the paper P.

In this state, test printing is performed and then main printing is performed. In the state prior to this printing, the link mechanism 120 including the operation lever 124 is located at the stop position S and the finger 103 is located at the non-locking position L, as shown in FIG. When printing is performed, first, the motor 4 is driven. As a result, the slider 100 reciprocates back and forth, but since the finger 103 is located at the non-locking position L, the paper P is not locked and conveyed. When the slider 100 moves back and forth, the sub-slider 135 of the movement prevention mechanism 130 moves back and forth together with the slider 100, and when the slider 100 retreats, the sub-slider 135 moves the stacker 6 of the rod 131. The rod 131 to the movement preventing position N by being locked to the locking portion 134 on the side, and at the end of the advance stroke of the slider 100, the sub-slider 135 is locked to the locking portion 133 on the printing position side of the rod 131. The rod 131 to the movement permitting position M. In the step of advancing the slider 100, the rod 131 is held by the plate spring 141 of the holding mechanism 140, so that the rod 131 is held at the movement blocking position N.

When printing is started, the operation lever 124 is tilted from the stop position S to the feed position F. In this case, not only when the rod 131 of the movement preventing mechanism 130 is located at the movement permitting position M, but also when the rod 131 is located at the movement inhibiting position N, the stopper 136 of the link mechanism 120 is fed. Since the rotation direction is defined by the spring 137 so that the link mechanism 120 can rotate in one direction that allows the movement to the position F, the link mechanism 120 moves from the stop position S to the feed position F as shown in FIG. Move to. As a result, the cam shaft 113 of the cam mechanism 110 is rotated, and the cam follower 114 faces the lower portion 111 of the cam shaft 113, so that the finger block 104 is rotated by the biasing force of the coil spring 105 and the finger 103 is engaged. It is positioned at the stop position K 1. Therefore, when the slider 100 retreats, the edge of the paper P is locked by the finger 103, and when the slider 100 advances, the paper P is locked by the finger 103 and conveyed to the printing position.

Even if the operation lever 124 is mistakenly returned from the feed position F 1 to the stop position S in the conveyance process of the paper P, at the end of the advance process of the slider 100, immediately until the conveyance of the paper P is completed. 3, since the rod 131 of the movement preventing mechanism 130 is located at the movement preventing position N, the stopping piece 136 does not hit the rod 131 and returns to the feed position F as shown in FIG. Therefore, since the finger 103 is not located at the non-locking position L, the locking of the paper P is released and the paper P is stopped in the course of transportation, and the situation in which the paper P is not transported to the printing position is prevented. . Therefore, the ink on the blanket 13 is surely printed on the paper P without adhering to the machine parts other than the paper P such as the support roller 14 and the situation in which the printing is hindered is prevented. It

In the above printing, trial printing is performed. In this trial printing, the plate cylinder position adjusting mechanism 230 performs image matching. Further, the blanket position adjusting mechanism 210 adjusts the printing position on the paper P. Further, for the subsequent fine adjustment of the print position, the paper positioning device 240 performs fine adjustment in the left-right direction, and the timing adjustment mechanism 220 performs fine adjustment in the front-rear direction.

Further, in the above printing, the fingers 103 reciprocate to feed the sheets P one by one from below between the blanket 13 and the support roller 14. On the other hand, the shafts of the respective cassettes are rotationally driven by the gears 16, 24, and 33, so that the ink of the ink supply cassette 40 is first drawn out from the ink storage section 41 by the ink supply roller 42 and the ink is applied. It is supplied to the ink application roller 31 of the cassette 30. Next, the ink is applied to the printing plate 21 on the plate cylinder 22 of the plate cylinder cassette 20 by the rotation of the ink application roller 31 of the ink application cassette 30. In this case, the black ink is applied to one printing plate 21, and the red ink is applied to the other printing plate 21.

Then, by rotating the plate cylinder 22 of each plate cylinder cassette 20, the ink on the printing plate 21 is transferred to the blanket 13 of the blanket drum 10. In this case, one printing plate 21 transfers the black ink, and the other printing plate 21 transfers the red ink. After that, the ink transferred onto the blanket 13 is printed on the fed paper P by the rotation of the blanket drum 10. By repeating this process in sequence, two-color printing is performed on a large number of sheets P. In this case, since two-color printing is performed by one setting, it is not necessary to change the printing plates one by one, and printing is extremely efficient.

When it is desired to stop printing, the operation lever 124 is moved from the feed position F after the slider 100 has completed the advancing stroke, that is, between the end of the conveyance of the sheet P and the slider 100 exiting stroke. Return to the stop position S. When the slider 100 completes the advance stroke, the sub-slider 135 engages with the locking portion 133 of the rod 131 on the printing position side to bring the rod 131 to the movement permitting position M, and the slider 100 reaches the middle of the exit stroke. Does not prevent the sub-slider 135 from engaging with the locking portion 134 of the rod 131 on the stacker 6 side to move the rod 131 to the movement blocking position N. Therefore, during this period, the operation lever 124 is moved from the feed position F to the stop position S. When it is returned to the position 1, the stopper 136 does not hit the rod 131, so that the link mechanism 120 moves to the stop position S. In the movement to the stop position S, the cam shaft 113 of the cam mechanism 110 is rotated and the cam follower 114 faces the high portion 112 of the cam shaft 113, so that the finger block 104 resists the biasing force of the coil spring 105. And the finger 103 is positioned at the non-locking position L. Therefore, when the slider 100 next advances, the sheet P is not locked and the sheet P feed is stopped. When printing is stopped, the lower end 60a of the support body 60 is lifted by operating the handle of the moving mechanism 70 in parallel with the operation of moving the operation lever 124 to the stopper position, and the blanket 13 of the blanket drum 10 is removed from the plate. The printing plate 21 on the cylinder 22 is separated, and the transfer of ink is stopped.

Further, since the rod 131 of the movement blocking mechanism 130 is located at the movement blocking position N when the slider 100 is retracted, the operation lever 124 can be returned to the feed position F in the same manner as above. Can not. As a result, since the finger 103 does not move to the non-locking position L immediately before the finger P locks the paper P, the situation in which the locking is insufficient and the conveyance is hindered is prevented.

Further, when the plate is changed to perform another printing, as described above, the two transfer mechanisms T including the set of the plate cylinder cassette 20, the ink application cassette 30, and the ink supply cassette 40 are The printing plate 21 is removed from the guide unit 50, the printing plate 21 is removed from the plate cylinder 22 of each plate cylinder cassette 20, and a new printing plate 21 is mounted. This attachment / detachment is not performed on the device in which the parts are densely arranged, but can be attached outside the device, so that it can be performed in a state where the surrounding space is wide, and the mounting workability is improved accordingly. In addition, because it is easy to perform image matching and print position adjustment, it is extremely efficient for printing that frequently changes plates, such as when printing multiple types of business cards at one time. .

In the above embodiment, the two transfer mechanisms T each including the set of the plate cylinder cassette 20, the ink application cassette 30, and the ink supply cassette 40 are provided, but the present invention is not limited to this. Of course, the above may be provided. Further, it is needless to say that the paper transport mechanism H according to the present invention is not limited to the above printing machine and may be applied to any small printing machine.

[0045]

[Effect of device]

 As described above, according to the paper transport mechanism of the compact printing machine of the present invention, even if the operation lever is mistakenly returned from the feed position to the stop position in the paper transport process, the transport blocking mechanism transports the paper. Since the movement of the link mechanism is blocked until the end of the operation, the fingers will not be located in the unlocked position, and the paper will not be locked and will not be conveyed to the printing position while it is being conveyed. The situation can be prevented. Therefore, it is possible to prevent a situation in which the ink adheres to the device and the like, and it is possible to significantly improve safety and operability.

When the rod is moved by the sub-slider provided on the slider, and the movement preventing mechanism is moved to the movement allowing position for allowing the movement of the link mechanism and the movement preventing position for preventing the movement of the link mechanism, The movement of the slider that moves the finger can be linked to the movement of the finger, and thus the movement can be prevented at certain timing.

[Brief description of drawings]

FIG. 1 is a perspective view showing a paper transport mechanism of a compact printing machine according to an embodiment of the present invention.

FIG. 2 is a front view showing, together with its operation, a paper transport mechanism of a compact printing machine according to an embodiment of the present invention.

FIG. 3 is a front view showing, together with its operation, a paper transport mechanism of a compact printing machine according to an embodiment of the present invention.

FIG. 4 is a side sectional view of a main part of a paper transport mechanism of a compact printing machine according to an embodiment of the present invention.

FIG. 5 is a plan view showing a paper transporting mechanism of a compact printing machine according to an embodiment of the present invention.

FIG. 6 is a side sectional view showing a paper transport mechanism of a compact printing machine according to an embodiment of the present invention.

FIG. 7 is a perspective view showing a small-sized printing machine to which a sheet conveying mechanism according to an embodiment of the present invention is applied.

FIG. 8 is a side sectional view showing a small-sized printing machine to which the paper feeding mechanism according to the embodiment of the present invention is applied.

FIG. 9 is a front cross-sectional view showing a small-sized printing machine to which a sheet conveying mechanism according to an embodiment of the present invention is applied.

FIG. 10 is a sectional view showing a blanket drum of a compact printing machine to which an embodiment of the present invention is applied.

FIG. 11 is a perspective view showing a plate cylinder cassette of a compact printing machine to which an embodiment of the present invention is applied.

FIG. 12 is a sectional view showing a plate cylinder cassette of a compact printing machine to which an embodiment of the present invention is applied.

[Explanation of symbols]

 1 base 3 side frame 4 motor 5 cover 6 stacker P paper 10 blanket drum T transfer mechanism 20 plate cylinder cassette 30 ink application cassette 40 ink supply cassette 50 guide section H paper transport mechanism 100 slider 103 finger K locking position L non-engagement Stop position 110 Cam mechanism 120 Link mechanism 124 Operation lever F Feed position S Stop position 130 Movement prevention mechanism 131 Rod M Movement allowable position N Movement prevention position 133,134 Locking part 135 Sub slider 136 Stopper piece 140 Holding mechanism

Claims (2)

[Scope of utility model registration request] 1. A slider which is provided on the front side of a base and which is provided below a stacker for stacking and stacking sheets and which is driven to move back and forth, and a locking position at which an edge of the stocked printing sheets can be locked. Also, the slider is provided movably to a non-locking position where the paper cannot be locked, and when the slider is in the locking position, it locks the edge of the stocked printing paper when the slider retreats and locks when the slider advances. In a paper transport mechanism of a small-sized printing machine including a finger that transports the formed sheet to a printing position, a cam mechanism that positions the finger at either a locked position or a non-locked position, and a cam mechanism that drives the finger. A link having an operation lever that can be moved to two positions: a feed position where the paper is fed to the locking position and a cam mechanism is driven to bring the fingers to the non-locking position and the paper feeding is stopped. A sheet conveying mechanism for a small-sized printing press, comprising a mechanism and a movement preventing mechanism that prevents the link mechanism from moving from the feed position to the stop position during the advance stroke of the slider. 2. The movement prevention mechanism is provided so as to be able to advance and retreat along the moving direction of the slider, and a movement permitting position for advancing and permitting movement of the link mechanism and a retreating mechanism for moving from the feed position to the stop position of the link mechanism. A rod that is movable to two positions, that is, a movement blocking position that blocks movement, a pair of locking portions that are provided separately from each other on the printing position side and the stacker side of the rod, and a slider advance stroke of the slider. At the end, the rod is locked in the locking portion on the printing position side to set the rod in the movement permitting position, and is locked in the locking portion on the stacker side in the retracting stroke of the slider to set the rod in the movement blocking position. The sheet transporting mechanism for a compact printing machine according to claim 1, further comprising a slider.