JPS6215450B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device that sucks and conveys paper stacked on a table in a printing machine or the like, and supplies the paper to the machine.

Machines that handle sheet-fed paper, such as sheet-fed printing machines and paper folding machines, have a mechanism that sucks up sheets of paper (hereinafter referred to as paper) stacked on a paper stacking table one by one and sends them out to the front printing device, etc. A paper feeding device for feeding paper is provided. FIG. 1 is a schematic configuration diagram showing an example of a conventional paper feeding device used in a sheet-fed printing press. Above, a cam shaft 2 and a lever shaft 3 are mounted between two support frames 20 on both sides of the figure, on the front side of the figure and on the back side of the paper. Freely movable cam lever 5
A cam follower 6, which is pivotally mounted to the cam follower 6, is in contact with the cam follower 6.
A vertical lever 8 whose upper end is pivotally connected to the free end of the cam lever 5 is pivotally supported at the free end of the support lever 7 fixedly supported by the lever shaft 3. A pair of left and right first adsorption devices 10 connected to an air intake source via an air hose 9 are attached to the . In addition, in front of the first suction device 10, that is, on the left side of FIG. 1, there are left and right panels that are driven by a drive device (not shown) and repeatedly move up and down, move forward, and retreat, as shown by arrows A ₁ and A ₂ in the figure. A pair of second suction devices 11 are provided, and furthermore, an air blower 12 and a blower foot 13 are provided near the rear end of the paper 1. On the other hand, near the front end of the paper 1, a pair of upper and lower paper feed rollers 14 and 15 are arranged.

In the paper feeding device configured in this way, a detector is built into the blower foot 13, which detects the top layer of paper and drives the automatic lifting device of the paper stacking platform to raise the paper stacking platform. It is constructed so that the paper surface always maintains a constant height. In addition, air is constantly blown by an air blower 12 onto the upper layers of the paper 1, which are kept at a constant height, in order to improve their separation. Then, the printing operation is started, the camshaft 2 rotates, the cam follower 6 faces the small diameter part of the cam 4, the first suction device 10 descends, and the lower end opening of the suction port 16 contacts the paper surface, and the air hose 9 The suction air creates a negative pressure inside the suction port 16, and the paper 1 is attracted. And the first adsorption device 1
When 0 attracts one sheet of paper 1 and rises, that paper and 2
The blowing foot 13 enters in the direction of arrow B between the paper and the second sheet of paper, and air is blown into the gap between the blowing foot 13 and the second sheet of paper.
presses the underlying paper. Paper 1 that floated in this way is placed in the second
At the same time as the adsorption device 11 adsorbs, the first adsorption device 1
0 is cut off and descends, and then the second adsorption device 1
1 moves forward to the chain line position while descending, so paper 1
is released from the first adsorption device 10 and transferred to the second adsorption device 1
1 sends it forward. Then, the edge of the paper is fed between the paper feed rollers 14 and 15, and
After the suction air is cut off and the second suction device 11 releases the paper 1, it retreats, and the paper 1 is sent out by the paper feed rollers 14 and 15. After this, the second adsorption device 11
One cycle is completed by retreating to the old position.

In the paper feeding operation performed as described above, the suction devices 10 and 11, especially the first suction device 10,
If the distance between the suction port 16 and the paper 1 is not appropriate, the suction condition will be poor or the paper will be agitated, so this distance must be adjusted depending on the quality of the paper and the thickness of the paper. In the conventional paper feeding device shown in the figure, a paper surface height detector is built into the blowing foot 13, so the height of the blowing foot 13 can be adjusted by rotating the adjustment screw 17 shown in the figure. By adjusting the height, the detected height of the paper 1 is changed, and the distance between the suction port 16 and the paper surface is indirectly adjusted.

However, in order to make such an adjustment, it is necessary to completely stop the paper feeding device because the blower foot 13 is constantly moving back and forth, and furthermore, it is necessary to completely stop the paper feeding device in order to judge the adjustment result. If the result is poor, the adjustment must be repeated, and the condition of the paper differs between low speed and high speed, making this adjustment extremely troublesome and time consuming. Furthermore, if the height of the paper surface changes, the relative height between the paper 1 and the paper feed rollers 14 and 15 changes during paper feeding, making it difficult to hold the paper 1, or the air in the paper handling section may change. Since the relative height of the blower 12, brushes (not shown), leaf springs, etc. and the paper 1 changes, resulting in poor paper handling, it is necessary to use both the height adjustment of the entire paper feeder and the blower foot adjustment. In this case, the adjustment was even more troublesome. There is also a device in which only the first suction device 10 can be adjusted up and down, but in this case as well, the adjustment is made by stopping the machine and loosening the nut, which is also time-consuming and inefficient. This resulted in an increase in the amount of waste paper generated during adjustment.

The present invention has been made in view of the above-mentioned points.The first suction device, which can be raised and lowered, is supported by a suction frame, and this is raised and lowered by a cam mechanism, and the cam lever shaft of this cam mechanism is eccentrically attached to the suction frame. By configuring the first suction device to be pivoted and rotated by a rotating means to regulate the upper and lower limit positions of the first suction device, the distance between the first suction device and the paper surface can be adjusted on the first suction device side. The present invention provides a paper feeding device that can be used during operation of a machine.

Hereinafter, its configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

2 to 7 show a paper feeding device according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is an enlarged sectional view of FIG. 2, and FIG. 4 is an enlarged sectional view of FIG. 2. 5 is a cross-sectional view taken from FIG. 3, FIG. 6 is an enlarged cross-sectional view taken from FIG. 2, and FIG. 7 is a cross-sectional view taken from FIG. 3. In these figures, the paper feeding device is formed into a rectangular frame shape in plan view by front and rear members (the front side is not shown) indicated by reference numeral 212 and left and right members indicated by reference numerals 213 and 214. In order to accommodate various sizes, this machine is equipped with a frame 21 that is supported so as to be movable and adjustable in the front and back direction, which is the paper transport direction, and its upper and lower ends support the paper 22 stacked on the paper stacking table. It is completely open at the top. Then, the left and right members 213 of the satsuka frame 21 in the width direction of the paper 22,
214, a nozzle receiver 23 as a fork member with its rotational axis oriented in the left-right direction is rotatably supported by fitting a shaft portion 231 into a shaft hole at the rear of the lower end of the frame 21. , the inward protrusion of the frame 21 is formed into a U-shape when viewed from above. A guide nozzle 26 of the first suction device, which is generally designated by the reference numeral 25, is attached to a pin 24 rotatably supported by the nozzle receiver 23 with its rotational axis directed back and forth. It is rotatably supported. This guide nozzle 26
4, the inner hole 27 is provided with an inner hole 27 that communicates between the upper and lower ends and opens to the lower end, and an upper branch part 28 of the inner hole 27 is provided with an inner hole 27 that penetrates the frame 21 and is connected to an air supply source (not shown). Air hose 29 is attached. Further, an intermediate nozzle 30 formed in a cylindrical shape is fitted to the outer circumferential portion of the guide nozzle 26 so as to be slidable from below, and between the upper end surface of the intermediate nozzle 30 and the stepped portion of the guide nozzle 26, An outer spring 31 is interposed to urge the guide nozzle 26 downward, and the guide nozzle 26 has an upper guide 61 and a lower guide 59 whose collar 32 will be described later.
It is held in place to restrict its vertical movement. moreover,
On the outer circumference of the guide nozzle 26, there is a suction port 34 formed in a cylindrical shape and equipped with a plurality of suction ports 33.
An inner spring 35 is slidably fitted from below, and between the inner bottom surface and the step of the inner hole 27 of the guide nozzle 26 is an inner spring 35 that urges the suction port 34 downward.
is interposed therein, and the suction port 34 is provided with a restriction pin 3 provided between the flange 36 and the flange 32.
7 prevents it from falling off and rotating. Also,
The intermediate nozzle 30 is configured to move up and down while its rotation is restricted by a guide plate 38 attached to the cover frame 21.

On the other hand, the left and right members 21 of the Satsuka frame 21
3, 214, a bearing 39 is attached to the nozzle receiver 23.
The bearing 39 is fitted above the bearing 39.
As shown by reference numeral t in FIG. 5, a longitudinal adjustment knob 41 having an inner hole 40 that is eccentric with respect to the outer periphery of the fitting is rotatably supported. In the inner hole 40 of the front-rear adjustment knob 41, a left-right adjustment knob 43, which has a grip portion 42 pivotally attached to its outer end, is regulated from moving in the axial direction by the grip portion 42 and its own collar. It is fitted with a screw 44 at its inner end.
is cut. And the guide nozzle 26
As shown in FIG. 2, a U-shaped groove 46 perpendicular to the U-shaped part formed at the upper end is provided, and a nut 47 having a threaded hole is inserted into this U-shaped groove 46. It is supported to be rotatable and movable along a groove, and a screw 44 of a left/right adjustment knob 43 is screwed into the screw hole. The left and right adjustment knob 43 is softly braked by a rotation stop 49 that is provided on a nut 47 and prevented from coming off by a set screw 48, and the rotation end of the guide nozzle 26 is attached to the shaft end of the rotation stop 49. Color 5 that regulates the position
0 is fixed. Furthermore, a detent 5 for softly braking the rotation of the longitudinal adjustment knob 41 is also provided.
1 is provided.

On the other hand, the front and rear members 21 of the Satsuka frame 21
A cam 52 that rotates in synchronization with the sucking operation of the paper 22 by the suction port 34 is supported by a cam shaft (not shown) between the two, and a lever shaft 53 is rotatably mounted on a shaft below the cam 52. has been done. A cam lever 54 formed in an L-shape is rotatably mounted on the lever shaft 53, and its movement in the axial direction is restricted by a collar 55. A cam follower 56 is pivotally attached to the cam surface of the cam 52. Further, a tension spring 57 is installed between the other free end side and the Satsuka frame 21 side to apply a rotational force to the cam lever 54 in a direction to press the cam follower 56 against the cam surface of the cam 52. . Furthermore, a guide rod 58 is supported between the free ends of the left and right cam levers 54, and lower guides 59 are provided at both ends of the guide rod 58. Further, a guide support 60 that is pivoted to the guide rod 58 in close proximity to the lower guide 59 includes the intermediate nozzle 30 as well as the lower guide 59.
An upper guide 61 that vertically holds the collar 32 is supported. As shown in FIG. 3 and FIG.
The worm wheel 63 is eccentric to the fitting portion of the frame 21 by an amount indicated by the symbol t ₁ , and the eccentric shaft end 62 on one side extending inside the frame 21 is provided with a worm wheel 63 .
is attached to the shaft. Further, on the support frame 21 near the worm wheel 63, a worm shaft 64 shown in FIG. 7 is rotatably supported in a vertical state, with movement in the axial direction being restricted by a knob 65 and a collar 66. This worm shaft 64 has a
A worm 67 that meshes with the worm wheel 63 is pivoted. Then, by rotating the worm shaft 64, the lever shaft 53 rotates, and its axis _F1 moves its eccentric position around the axis F of the shaft support.
The lever shaft 53 of the worm wheel 63 is arranged so that the lever shaft 53 of the worm wheel 63 can be distributed to both sides of the center line S.
The phase is set for Then, by rotating the lever shaft 53, the cam lever 54 moves the axis of the support part due to its eccentric action, and the regulation position of the intermediate nozzle 30 by the upper and lower guides 59, 61 is adjusted in the vertical direction. It is configured.

In the vicinity of the suction port 34, there is an arrow H shown in FIG.
A blowing foot 68 that can move forward and backward in the direction shown is provided, and this blowing foot 68 and the air blowing foot 1 shown in FIG.
2. The configurations of the second suction device 11 and paper feed rollers 14 and 15 are the same as those of the prior art, so their explanation will be omitted.

The operation of the paper feeding device configured as above will be explained. Paper 22 is stacked on a paper stacking table, and after air is blown onto several of the upper layers to improve separation, printing work is started. In this case, cam follower 5
6 is in contact with the large diameter part of the cam 52, and the upper and lower guides 6 are connected via the cam lever 54 and the guide rod 58.
1 and 59 are lowered, and the intermediate nozzle 30, which is held by the collar 32, is lowered. Further, the suction port 34 is also lowered by the elastic force of the inner spring 35. When air is taken in this state, the paper 22 on the top is sucked and closes the air intake hole 33 of the suction port 34, and by continuing to take air, the inside of the suction port 34 and the inside of the inner hole 27 above it are all negative. Because the pressure is
The inner spring 35 is compressed by atmospheric pressure, and the suction port 34 rises while sucking the paper 22. And mouthpiece 3
When the flange 36 of No. 4 comes into contact with the flange 32 of the intermediate nozzle 30, the ascent is momentarily stopped, and at the same time, the blow foot comes in and presses down the top surface of the second sheet of paper, causing the laminated paper to spread out. control what is allowed. At this time, since the cam follower 56 approaches the small diameter part of the cam 52, the intermediate nozzle 30 and the suction port 34 work together to further rise while compressing the outer spring 31, and when the cam follower 56 reaches the highest point, air is ejected from the blower foot 68. The paper 22 is sucked and raised, and air is blown over the entire lower surface of the paper 22, causing it to float. In this state, air is sucked into the second suction device 11 shown in FIG. 1 to suction the floating paper 22, and at the same time, the suction to the first suction device 25 is stopped, so that the inside thereof becomes atmospheric pressure. The suction port 34 suddenly descends due to the elastic force of the approaching inner spring 35, pushing down the paper 22 and releasing it from the suction port 34. Thereafter, the second suction device moves back and forth and up and down as shown by arrows A ₁ and A ₂ in FIG. 1 to convey the paper 22, and the intermediate nozzle 30
One cycle is completed by descending by the action of 2.

In the paper feeding operation performed in this manner, the flange 3 of the intermediate nozzle 30
It comes into contact with paper 2 and stops suddenly, and the impact causes paper 2 to
2 is fanned, wind is generated by the elasticity of the paper, blowing air from the rear end of the paper 22 to the center, and when the intermediate nozzle 30 finishes compressing the outer spring 31 and stops, the paper 22 is blown again. 22 is fanned, so that the front part of the paper 22 is aerated. By airing in this manner, the paper is completely separated. Further, when the paper 22 is delivered to the second suction device, the suction port 34 rapidly pushes down the paper 22, so that the paper is easily released and the delivered paper 22 is not distorted or misregistered.

Then, when starting work or changing the laminated paper,
As mentioned above, the first suction device 25 is used to correct the fact that the paper is bent and stacked on the paper stacking table, or to tension the paper by pulling it in the width direction when suctioning the paper. It is necessary to adjust the inclination angle of the Therefore, in this device, while operating the machine and checking the suction posture of the paper 22, the front and rear adjustment knob 41 is
When rotated, the left/right adjustment knob 43 fitted into the inner hole 40 moves eccentrically due to the eccentricity between the fitting outer periphery and the inner hole 40, and engages with the insertion end via the nut 47. The first adsorption device 25
As shown by the chain line in FIG. 3, it swings back and forth around the shaft portion 231 to adjust the inclination angle in the front and back direction. Further, when the grip portion 42 of the left-right adjustment knob 43 is rotated, the nut 47 screwed into the threaded portion 44 at the insertion end moves back and forth in the left-right direction.
The first suction device 25 engaged with the U-shaped groove 46 swings left and right around the pin 24 as shown by the chain line in FIG. 2, and the inclination angle in the left and right direction is adjusted. By adjusting in this way, when the paper 22 is attracted by the suction port 34 and rises, the suction part moves according to the inclination angle, so that the paper 22 is
The posture when transferring to the suction device has been corrected,
Also, it is pulled in the width direction and becomes tense. and,
Since this adjustment can be made while the machine is operating while observing the suction state of the paper 22, it can be done very accurately and in a short time, and has good operability.

Further, if the thickness or quality of the paper 22 changes, rotating the knob 65 will cause the lever shaft 5 to move due to the engagement between the worm 67 and the worm wheel 63.
3 rotates, and this lever shaft 53 makes the shaft end 62 concentric with the worm wheel 63 and the shaft mounting portion of the cam lever 54 eccentric, so that the shaft center F ₁ of the fitting portion is eccentrically supported. It moves in an arc shape centered on the axis F of 53a. Therefore, the cam lever 54
The upper and lower guides 61 and 59 provided at the free end of the cam lever 54 mainly move in the vertical direction together with the cam lever 54, thereby changing the upper and lower limit positions when the cam mechanism moves up and down. 61,
The upper and lower limit positions of the intermediate nozzle 30, which has the flange 32 held by the intermediate nozzle 30, and therefore the suction port 34 are moved, and the distance between the lower surface and the paper surface is adjusted. This adjustment is also carried out in a very short time while the machine is running, and the relative position between the paper feed roller, air blower, etc. does not change, and a good paper feeding function can be ensured. In this embodiment, the swing adjustment range of the cam lever 54 is set so that the shaft center _F1 can be distributed to both sides of the center line S of the cam lever 54, so that the lever shaft 53 can be moved to the fullest adjustment range. Even if the cam lever 54 is rotated to
The component of movement in the direction of the center line S is extremely small, so phase fluctuations between the cam 52 and the cam follower 56 can be ignored, and the timing of raising and lowering the first suction device 25 is not affected.

8 and 9 show other embodiments of the lever shaft rotating means according to the present invention. FIG. 8 is a front view corresponding to FIG. 3, and FIG. 9 is a front view corresponding to FIG. 8.
FIG. 3 is a sectional view of HH and a sectional view of the lever shaft support. In this embodiment, a rotating lever 69 is fixed to the lever shaft 53 by a dowel pin 70 and is pivotally mounted, and an operating shaft 72 is attached to a bracket 71 rotatably supported by the suspension frame 21.
The upper end threaded portion is screwed together and supported so that it can move forward and backward. A collar 7 is attached to the working end of the operating shaft 72.
A free end portion of a rotating lever 69 is pivotally attached to a connecting pin 74 that is fitted with the axial movement restricted by a lever 74, and a knob 75 is attached to an upper end portion of an operating shaft 72. It is worn. Further, a compression coil spring 76 is interposed between the collar 73 and the bracket 71 and urges the cam lever 54 in the downward direction of the intermediate nozzle 30 together with the rotating lever 69. is screwed with a fixing knob 77 that fixes it at the rotation adjustment position. The rest is the same as the previous embodiment.

With this configuration, the fixed knob 7
7 is loosened and the operating shaft 72 is rotated with the knob 75, the lever shaft 63 is rotated via the rotary lever 69, and the cam lever 54 is mainly moved in the vertical direction due to its eccentric action. It works similarly to the example.

Note that the paper feeding device according to the present invention can be similarly implemented not only in a sheet-fed printing press but also in any machine that handles sheet-fed sheets, such as a paper folding machine.

As is clear from the above description, according to the present invention, in a paper feeding device used in a sheet-fed printing press, etc., a first suction device that can be raised and lowered is supported by a suction frame, and this is raised and lowered by a cam mechanism. The cam lever shaft of this cam mechanism is eccentrically supported on the suction frame and rotated by a rotating means to regulate the upper and lower limit positions of the first suction device. The distance between the suction port and the paper surface can be adjusted while checking the suction state of the paper while the machine is running, reducing adjustment time and improving work efficiency. In addition to improving paper performance, the spacing is adjusted directly on the first suction device side rather than on the paper side, so the relative position between the paper surface, paper feed roller, blower foot, etc. does not change, and there is no need to correct the position. This further reduces the adjustment time. Also,
Since it is no longer necessary to adjust the foot of the foot up and down, and the adjustment mechanism can be removed, the mass of the foot of the foot is reduced accordingly, and the effects are remarkable, such as high-speed adaptability and the pursuit of operational characteristics.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a conventional paper feeding device.
2 to 9 show a paper feeding device according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a −-
4 is an enlarged sectional view of FIG. 2, FIG. 5 is an enlarged sectional view of FIG. 3, FIG. 6 is an enlarged sectional view of FIG. 2, and FIG. 7 is an enlarged sectional view of FIG. 3. −
The sectional view, FIGS. 8 and 9 show other embodiments of the lever shaft rotating means in the present invention, FIG. 8 is a front view showing this corresponding to FIG. 3, and FIG. FIG. 8 is a cross-sectional view of HH in FIG. 8 and a cross-sectional view of the lever shaft support. 21... Satsuka frame, 22... Paper, 25...
...First suction device, 52...Cam, 53...Lever shaft, 54...Cam lever, 56...Cam follower, 59...Lower guide, 61...Upper guide,
62... Eccentric shaft support, 63... Worm foil,
64... Operating shaft, 67... Worm, 69... Rotating lever, 71... Bracket, 72... Operating shaft.

Claims (1)

[Claims] 1 Satsuka frame 2 supported by the machine frame
1 and the laminated paper 2 supported by this Satsuka frame 21
a lever shaft 53 rotatably supported by the suction frame 21 and provided with an eccentric portion that is eccentric with respect to the shaft support; , a cam lever 54 supported by the eccentric part of this lever shaft 53 and having a guide member at its free end that engages with the first suction device 25; and a cam follower 56 attached to the free end side of this cam lever 54, which a suction device upper and lower cam 52 that is in contact with the first suction device 25 and rotates in synchronization with the suction operation of the first suction device 25; and a rotating means that rotates the lever shaft 53 to adjust the upper and lower limit positions of the guide member. A paper feeding device characterized by comprising: 2 As a means for rotating the lever shaft 53, a worm wheel 63 is rotatably mounted on the lever shaft 53 concentrically with its shaft support, and the worm wheel 6 is rotatably mounted on an operating shaft 64 supported on the Satsuka frame 21 side.
3. The paper feeding device according to claim 1, further comprising a worm 67 that meshes with the worm 67. 3 As a rotating means for the lever shaft 53, a rotating lever 69 is pivotally attached to the lever shaft 53, and a threaded portion is screwed into the support member 71 on the side of the frame 21, so that the lever shaft 53 is supported so as to be freely forward and backward. an operating shaft 7 rotatably connected to the free end of the rotary lever 69;
2. A paper feeding device according to claim 1, comprising: 2.