JPH11291453A - Sheet carrying device for sheet delivery device in sheet feed press, and sheet delivery device equipped therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perfectly prevent from being affected by influences, which make the running of respective sheets unstable, by a method wherein a front spoiler is rocked with a period, which is mutually related to the period of a clip pawl similarly with a clip pawl finger. SOLUTION: By carrying a sheet 4 pinched between the respective free end parts of the clip pawl supporting part 2 of each clip pawl bridge 1 and its clip pawl finger 3 to a feeding direction indicated with the arrow so as to fix the respective clip pawl fingers 3. Further, those clip pawl fingers are rocked about a clip pawl shaft 81 equipped in the clip pawl bridge 1 or a geometry shaft 8, which is lateral to the feeding direction and, at the same time, parallel to a sheet guide surface 6. Simultaneously, the front spoiler 25 is rocked with a period, which is mutually related to the period of a clip pawl 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to at least a gripper bridge which rotates in accordance with an operation and is fed along a sheet guide surface in a feed direction. The gripper bridge can swing at a gripper cycle. A gripper having gripper fingers for capturing a gripper peripheral area transversely to the feed direction in the sheet transported by the gripper bridge, respectively; and a gripper bridge and sheet guide. The present invention relates to a sheet transport device having a front spoiler for blocking a gap between the sheet and a surface. The invention also relates to a sheet ejection device for a sheet-fed printing press, comprising the sheet transport device.

[0002]

2. Description of the Related Art A sheet-conveying device of this kind is known, for example, from DE-A-3308907. In this device, the front spoiler is arranged such that its end, facing the sheet guide surface, is relatively close to the free end of the gripper finger. In the known sheet transport device, when the gripper receives a sheet from the transfer cylinder, such an arrangement is necessary in order to avoid a collision between the transfer cylinder and the front spoiler. Has become.

[0003] These gripper fingers are located downstream from the feed direction and opposite the free ends of the gripper fingers and are capable of swinging about an axis supported in a gripper bridge. ing. This means that for each perpendicular that reaches onto the sheet guide surface, the front spoiler starts at the end of this front spoiler that is directed towards the sheet guide surface and is at least downstream in the feed direction. It is assumed that there is a tendency to slope upward to the side. In this state, the front spoiler acts as an air guide plate for pushing the spiral flow forward in accordance with the movement.

The lower air flow of the sheet, which is fed over the sheet guide surface by gripping, can be sufficiently achieved by known sheet transport devices, especially if the front spoiler is made of an elastic material. In this case, it is possible to prevent the sheet guide surface from coming into contact with the end of the front spoiler facing the sheet guide surface. However, the vortex which is pushed forward by the front spoiler has the disadvantage that it acts on a particularly forward region of the respectively advancing sheet. In order to ensure that this area is in contact with the sheet braking device, and also that the sheets released from the sheet braking device after being braked to the ejection speed are piled up on a pile. In the meantime, this region is to be brought into contactless overlapping by a subsequent gripper bridge, and also by a subsequent sheet fed by the gripper bridge to the sheet braking device. Is required to run without flapping.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet transport apparatus as described above, wherein each sheet fed by the gripper bridge makes the travel of the sheet unstable. In addition to a structure that is completely unaffected by such influences, a structure in which the airflow relationship around the gripper bridge that passes the sheets has no effect on the sheet that moves forward is applied. Is to do.

[0006]

This object is achieved by allowing the front spoiler to oscillate at a period that is correlated with the period of the gripper, similar to the gripper finger. It is. This allows the front spoiler to be oriented a sufficient distance downstream from the free end of the gripper finger in the feed direction with respect to the gripper finger, with the end of the front spoiler facing the sheet guide surface. It is possible to adopt a configuration that can be arranged only at a distance. In this case, the distance is such that it gives the front spoiler a profile suitable for airflow, i.e., a profile around which the swirl occurring before the gripper bridge flows without being formed. ing. This is done by the front spoiler, which is also correlated with the period of the gripper performed by the gripper fingers, when the gripper receives a sheet from the transfer drum. This is because the spoiler can be prevented from colliding with the paper transfer cylinder.

[0007]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a part of a sheet transport device designated by reference numeral I in FIG. At a position corresponding to this part of the gripper bridge 1, the gripper bridge 1 is sandwiched between the gripper receiving portion 2 of the gripper bridge 1 and each free end of the gripper finger 3. The sheet 4 is transported over a sheet guide surface 6 formed on a sheet guide device 5 in a feed direction indicated by an arrow. In this case, for each sheet 4, a gripping peripheral area 4.1 of the sheet 4, which extends in the transverse direction to the feed direction, is sandwiched. Each gripper finger 3 is fixed to the gripper body 7. The gripper finger 3 swings about an axis of a gripper shaft 8.1 provided in the gripper bridge 1, i.e., a geometry axis 8 extending transversely to the feed direction and parallel to the sheet guide surface 6. It is possible. The force required to sandwich the sheet 4 is provided by a spring (not shown) that keeps the gripper finger 3 in one swinging state. Three
The gripper 9, which is also constituted by the gripper body 7, is closed.

In order to swing the gripper 9 in the swinging state in which the gripper 9 is open, the roller lever 11 as shown in FIGS. A roller lever 11 controlled by a pawl cam 10 is provided. Mouth cam 10
Immediately before the mouth 9 receives each sheet 4
The arrangement and configuration are such that the paper transfer cylinder 12 shown in FIGS. In this case, in this swinging state, the gripper finger 3 is separated from the gripper receiving portion 2, and the gripper finger receiving portion 2 of the corresponding gripper receiving portion 13 on the paper transfer cylinder 12 is moved. One swing state is obtained by the action of the above-mentioned spring from the time when the vehicle enters the space. In this swinging state, the sheet 4 fed by the paper transfer cylinder 12 up to this point is sandwiched between the gripper receiving table 2 and the gripper finger 3.

The gripper finger 3 is placed in this oscillating state at a gripper cycle determined by the speed of sheet processing, and is synchronized with the operation of the gripper bridge 1 shown in FIG. The gripper 1 is opened by rotation. In this case, the gripper bridge 1 is rotated by the rotation of the paper discharge device 25 indicated by a dashed line in FIG. It is connected to the chain transport running belt 14.

The chain transport running belt 14 includes a driving sprocket wheel device 15 and a guide sprocket wheel device 16 and, particularly, between the gripper receiving portions 13 on the paper transfer cylinder 12 during operation. The bridge 2 is to be sent in such a manner that each bridge 2 enters. The gripper cam 10, which has a role of transferring each sheet 4 from the paper transfer cylinder 12 to the sheet transport device for opening and closing the gripper 9, is provided to the drive sprocket wheel device 15 following the paper transfer cylinder 12. Installed. Paper cylinder
12 belongs to the processing section at the end of the printing press and can be a component in a finishing unit such as, for example, a printing unit or a varnishing unit. In the example shown in FIG. 5, the last processing unit is a printing unit 24 operated by the offset printing method.

The guide sprocket wheel device 16 includes:
A gripper cam, also not shown in FIG. 5, is mounted which cooperates with the roller lever 11 of each gripper bridge 1. The gripper cam also swings the gripper finger 3 temporarily to open the gripper finger 3, whereby each sheet of paper reaching the working range of the sheet braking device 17. 4 is transferred to the gripper finger 3, and is reduced to the sheet discharge speed by the gripper finger 3 and finally released. Subsequently, the sheet 4 moves simultaneously to the leading edge stopper 18 while descending, and
18 and a trailing edge stopper 19 opposite the leading edge stopper 18
Pile 20 by the lifting unit while being aligned by
On a pile platform 21 which can be lowered by the piled-up height together with the preceding and / or succeeding sheet 4. For this lifting unit, only the platform 22 and the lifting chain n23, which is supported by this platform 22 and is represented by dashed lines, are shown in FIG.

The gripper bridge 1 is shown only in the form of a gripper 9 in FIG. 5, and the gripper receiver 2 attached to the gripper bridge 1 is schematically illustrated. ing.

As can be seen from FIGS. 1 to 4, each gripper bridge 1 further has a front part capable of shielding the gap 26 existing between the gripper bridge 1 and the sheet guide surface 6. Includes Spoiler 25. This front spoiler 25
Is swingable at a period similar to the gripper finger 3 and also at a period correlated with the gripper period.

In order to perform such a swing, for example,
A first swinging state mounted on the gripper shaft 8.1 and blocking the gap 26 and a second swinging away from the sheet guide surface 6
Between the rocking condition of the front spoiler and the spring device acting on the gripper 9 which can be swung by a specific angle with respect to the geometry axis 8 of the gripper shaft 8.1. A spring device for biasing the front spoiler 25 in this swinging direction, such as 9; and a roller lever for swinging the front spoiler 25 against the action of the spring device for biasing the front spoiler 25. The spoiler cam cooperates with the roller lever described above, and is in a swinging state in which the gripper finger 3 of the gripper 9 in the gripper bridge 1 approaching the paper transfer cylinder 12 is separated from the gripper receiving portion 2. At the same time as when the sheet 4 is received from the transfer drum 12 or after the sheet 4 has been received, when the first swinging state of the gripper 9 is made as shown in FIG.
Comprises, at least substantially thereafter, a spoiler cam arranged and configured to be in its second swing state shown in FIG. In this case, this spoiler cam is mounted on the drive sprocket wheel 15 and here the swinging of the front spoiler 25 which is performed in particular in order to prevent the front spoiler 25 from colliding with the paper transfer cylinder 12. , In the second swing state.

As has already been mentioned, the guide sprocket wheel arrangement 16 also has the respective gripper bridge 1 which, during operation, opens the gripper 9 temporarily by a corresponding swing of the gripper finger 3. Roller lever 1
A grip cam is attached for driving in cooperation with 1. However, in the area of the guide sprocket wheel device 16 there is no paper transfer cylinder that could collide with the front spoiler 25 in its first swinging state, so in this area this is done. As in the swing of the finger 3, the swing of the front spoiler 25 can be omitted. In the example shown here, the following is considered in this situation. That is, there is no spoiler cam in the area of the guide sprocket wheel device 16, so that the front spoiler 25 brakes each sheet 4 while the gripper 9 is temporarily opened. Means that it remains in its first swing state for delivery to the device 17. Thereby, the swinging of the front spoiler 25, which occurs in the same way as the swinging of the gripper 9 each time while each gripper bridge 1 rotates, is performed so that the cycle of the gripper, that is, the paper transfer cylinder, is performed. When passing through 12, the first finger gripper swinging state corresponding to the state of "grip 9 closed" and the second finger gripping state corresponding to the "grip 9 open" state And the subsequent rocking of finger gripper 3 while returning to the first rocking finger rocking state again while each finger gripping bridge 1 is rotating. 3 swings 2
A cyclic relationship occurs such that the front spoiler 25 is swung in time with the operation in a rather choppy cycle. In this case, the spoiler cam mounted on the drive sprocket wheel 15 is further connected to the front spoiler 2 of the gripper bridge 1 passing through the paper transfer cylinder 12.
5 is in its second swinging state, i.e. swinging which blocks the gap 26 between the sheet guide surface 6 and the gripper bridge 1 as the front spoiler 25 passes through the sheet guide surface 6 The arrangement and the configuration are such that the time intervals between the states include the time intervals for opening the gripper 9 of the gripper bridge 1 passing through each paper transfer cylinder 12.

In this case, the angle at which the front spoiler 25 can swing between the two swinging states is such that the front spoiler 25 passes through the paper transfer cylinder 12 without colliding in the second swinging state. To be selected.

In the second embodiment, the front spoiler 25 of each gripper bridge 1 is
It is possible to swing together with the finger 3 of the finger 9 of the finger 9 in FIG. As shown in FIG. 1, the front spoiler 25 is here, for example, rigidly connected to a predetermined number of gripper base bodies 7 in the gripper bridge 1, so that the additional spoiler 25 The swinging of the front spoiler 25 related to the period of the gripping can be performed first from here, in the same manner as the gripping of the gripping finger 3, without the need for a dynamic rocking mechanism. ing. Accordingly, there is a mutual relationship between the spoiler cycles, that is, such a cycle that the front spoiler 25 oscillates at the time of the operation with the gripper cycle such that the cycle of the spoiler and the gripper cycle coincide. In this case, the front spoiler 25 is also temporarily swung to its second swing state in the area of the guide sprocket wheel device 16. Although this is not necessary, it is possible to dare to perform the prescribed swinging of the front spoiler 25, especially for simple means.

In any case, the front spoiler 25 is configured and arranged such that the gripper 9 of the gripper bridge 1 which rotates with the operation is in the wind of the front spoiler 25. The front spoiler 25 has a cross section extending downstream with respect to the gripper 9 of the gripper bridge 1 in the feed direction. As the gripper bridge 1 passes over the sheet guide surface 6, the front spoiler 25 is in its first swinging state. In this case, the downstream-side end of the cross section of the front spoiler 25 is at least in the immediate vicinity of the sheet guide surface 6 and also has a rubber-like elastic lip at its end. If so, the sheet guide surface 6
It is possible to slide even on the top. 3 and 4, the front spoiler is located downstream, as can be seen by the direction of the ends in the cross section of the front spoiler 25.
By being able to perform the swinging described above, the front spoiler 25 can be prevented from colliding with the paper transfer cylinder 12. For the aforementioned cross section,
The side of this cross section that deviates from the sheet guide surface 6 has the following contour: That is, at the position where the gripper bridge 1 passes through the sheet guide surface 6, starting from the end of this section located on the downstream side, the contour extends upstream in the feed direction. At the same time, the gripper bridge 1 passing through the sheet guide surface 6 is configured to rotate and flow over a maximum range without releasing on the side remote from the sheet guide surface 6.

Particularly when a large-sized sheet is conveyed, the shape stability of the gripper bridge is required. As one method for satisfying this requirement, as can be seen from FIG. 2, the gripper bridge 1 includes the gripper receiving portion 2.
In addition to the first wall-like member 27 supporting the first spoiler 25, a second wall-like member 28 is provided downstream of the front spoiler 25 in the feed direction. In this case, the second wall-like member 28
In the direction of the air flowing in the feed direction, the flow path 2 for the gripper bridge 1 cooperates with the front spoiler 25.
Preferably, 9 is formed.

As can be further seen from FIG. 2, the wall-like member 28
Are arranged as follows. That is, the flow path 29 is
As viewed from the position of the gripper bridge 1 passing through the sheet guide surface 6, the entrance cross section 30 facing the sheet guide surface 6, and the side of the gripper bridge 1 that is remote from the sheet guide surface 6. Outlet section 31 located at In this case, the wall-like member 28 is preferably configured as a guide plate. Furthermore, the wall-like member 28 formed as a guide plate has a cross section having a convexly curved profile on the wall-like member 28 side deviating from the flow path 29. In this case, such a curvature of the contour is such that the air flow present in the flow passage 29 in accordance with the operation is wide at the outlet cross section 31 and the air flow flowing along the contour of the wall-shaped member 28 formed as a guide plate. It is designed to merge without disturbing over the area.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a gripper bridge for feeding a sheet in a feed direction across a sheet guide surface in a cross-section along the feed direction as it passes through the sheet guide surface.

2 is a cross-sectional view corresponding to FIG. 1, showing a gripper bridge having excellent shape stability.

FIG. 3 shows a gripper bridge similar to that of FIG. 2;
FIG. 4 is a cross-sectional view showing a state immediately before receiving a sheet from a paper transfer cylinder.

FIG. 4 is a cross-sectional view showing the gripper bridge of FIG. 3 in a state of receiving a sheet from a paper transfer cylinder.

FIG. 5 is a schematic diagram illustrating a part of a sheet printing press including a sheet discharging device including a sheet conveying device.

[Explanation of symbols]

1 gripper bridge 2 gripper gripper 3 gripper finger 4 sheet 4.1 peripheral area for gripper of sheet 4 sheet guide 6 sheet guide surface 7 gripper base body 8 geometry axis 8.1 gripper Gripper shaft 9 Gripper 10 Gripper cam 11 Roller lever 12 Paper transfer cylinder 13 Paper gripper receiving part of paper transfer cylinder 12 Chain transport running belt 15 Driven chain device 16 Guide sprocket wheel device 17 Sheet braking device 18 Leading edge Stopper 19 Trailing edge stopper 20 Pile 21 Pile stand 22 Platform 23 Elevating chain 24 Printing unit 25 Front spoiler 26 Gap between gripper bridge 1 and sheet guide surface 6 27 First wall member of gripper bridge 1 28 Second wall member of gripper bridge 1 29 Flow path 30 Inlet cross section of flow path 29 31 Exit cross section of flow path 29

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 390009232 Kurfuersten-Annage 52-60, Heidelberg, Federal Republic of Germany

Claims (6)

[Claims] At least a gripper bridge (1) that rotates with operation and is fed along a sheet guide surface (6) in a feed direction, wherein the gripper bridge (1) is provided.
A gripper (9) having a gripper finger (3) swingable at a gripper cycle for capturing a sheet (4) conveyed by the gripper bridge (1), respectively; Sheet for a delivery device of a sheet-fed printing press, comprising a front spoiler (25) for blocking a gap (26) between the gripper bridge (1) and the sheet guide surface (6). A sheet conveying device according to claim 1, wherein said front spoiler (25) is swingable at a period which is correlated with a period of the gripper similarly to said gripper finger (3). 2. A gripper bridge (1) located in front of said front spoiler (25) downstream in the feed direction.
2. The wall-shaped member (28) together with the front spoiler (25) forms an air flow path (29) that flows through the gripper bridge (1) in a feed direction. Sheet transport equipment. 3. The gripper of the sheet guide surface (6) as viewed from the position of the gripper bridge (1) passing through the sheet guide surface (6). 3. The sheet conveying device according to claim 2, comprising an outlet section (31) located on the side of the bridge (1). 4. The sheet conveying device according to claim 2, wherein the wall-shaped member is formed as a guide plate. 5. The wall-shaped member (28) formed as a guide plate has a section having a convexly curved profile on the wall-shaped member (28) side deviating from the flow path (29). 5. The sheet conveying device according to claim 4, wherein 6. A delivery device for a sheet-fed rotary printing press, comprising a sheet transport device according to claim 1.