JPH0742733Y2 - Blanket wrapping device around printing cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a blanket winding device for winding a blanket around a peripheral surface of a printing cylinder such as a blanket cylinder of an offset printing machine.

[Conventional technology]

Blankets formed by alternately stacking rubber layers and cloth are wrapped around the printing cylinders of various printing machines such as the blanket cylinders of offset printing machines.The image on the plate is transferred to this blanket and then printed on paper. It is transferred and printed.

FIG. 7 is a partially cutaway side view of the upper half of a blanket cylinder in which a conventional blanket winding device for a printing cylinder is implemented, FIG. 8 is a developed plan view of the same main portion, and FIG. 9 is a vertical section of the center of the cylinder. It is a side view. In these figures, the bearers on both sides of the blanket cylinder 1
Both ends of a winding rod 3 which is inserted into a hole 1a which axially penetrates the body peripheral portion are rotatably supported by a bearing 2 which is fitted and bolted to the winding rod 3a. The protruding end of
The ratchet wheel 4 is fixed with a key 5. Also,
A ratchet lever 6 formed in a U shape is rotatably fitted to the protruding end so as to sandwich the ratchet wheel. A claw 7 that pivots so that Reference numeral 9 is a leaf spring for click that locks the rotation of the pawl 7 at a meshing position shown by a solid line and a non-meshing position shown by a chain line, and 10 is fixed to the body end 1b side and is a ratchet lever. 6 is a stopper that restricts the rotation limit of 6.

On the other hand, a cut groove 3a is provided in the insertion portion of the hole 1a of the winding rod 3, and the base 12 of the tip of the blanket 11 to be wound around the body circumferential surface as described later is provided in the cut groove 3a. It is configured to be engaged. Reference numeral 13 is a hexagonal head for applying a spanner to rotate the winding rod 3. Further, the ratchet lever 6 has a pair of protrusions provided on the ratchet wheel 4.
A stopper 14 is provided so as to restrict the both ends of rotation of the ratchet wheel 4 by selectively engaging the 4a and 4b, and the free end of the ratchet lever 6 has a screw hole at its free end.
A jack bolt 15 for additional tightening having 15a is screwed.

In the blanket winding device configured as described above, in order to wind the blanket 11,
When the 4a engages with the stopper 14 and the jack bolt 15 is fully loosened, the cut groove 3a of the winding rod 3 faces the opening of the body 1, so that the mouthpiece 12 is inserted into one cut groove 3a. , The gripping side winding rod 3 is rotated by, for example, about 90 °, and the base 12
Do not come off. At this time, the pawl 7 starts to mesh with the teeth of the ratchet wheel 4, so that the ratchet wheel 4 does not return. Then, the blanket cylinder 1 is rotated to insert the other cap 12 into the cut groove 3a, and then the winding rod 3 is also rotated about 90 ° to temporarily tighten the blanket 11. After that, when the jack bolt 15 is tightened, the ratchet lever 6 and the ratchet wheel 4 rotate integrally, and the blanket 11 is finally tightened by the rotation of the winding rod 3.

When removing the blanket 11, use the jack bolt 15
When the claw 7 is slightly loosened and the claw 7 is removed, the winding rod 3 is rotated and the blanket 11 is loosened until the protrusion 4a hits the stopper 14 which is rotated in the tightening direction from the position shown in the drawing. In this state, since the stopper 14 is not in the position shown in the drawing, the jack bolt 15 is fully loosened and the ratchet lever 6 is rotated to occupy the position shown in the cut groove 3a to prepare for the next mouthpiece insertion.

[Problems to be solved by the invention]

Thus, in the conventional blanket winding device,
Since the stopper 14 and the jack bolt 15 are provided on the same ratchet lever 6 side, when the cap 12 is inserted into the cut groove 3a, the jack bolt 15 is normally inserted for inserting / removing the blanket 11 each time the blanket 11 is attached / detached. There is a problem that workability is poor and preparation time is long because it has to be loosened enough to occupy the correct position. Further, there is a problem that the space occupied by the device becomes large and the device cannot be configured compactly.

[Means for solving problems]

In order to solve such a problem, in the present invention, a switching mechanism that switches the action direction of the ratchet teeth between the forward direction and the reverse direction is interposed between the ratchet lever for additional tightening and the winding rod, and a stopper is provided on the printing cylinder. Prevents the rotating end of the ratchet lever from protruding outside the peripheral surface of the printing cylinder, and the member fixed to the printing cylinder side and the winding bar side at the cylinder end bearing that pivotally supports the winding rod. A click mechanism that selectively locks the rotation of the winding rod at either the blanket mouthpiece insertion position into the cut groove or the additional tightening start position by the ratchet device is provided.

[Action]

When winding a blanket, insert the blanket into the cut groove of one of the winding rods that is stationary by locking the blanket by a click mechanism and then rotate the winding rod at a predetermined angle. Then, it will be locked by the click mechanism and stop, so after rotating the cylinder to wind the blanket around the circumference of the cylinder, insert the mouthpiece into the other kerf and engage the winding rod with the hexagon head. Rotate to the temporary tightening position with the combined spanner and lock it with the click mechanism. After that, when the jack bolt is rotated, the blanket is additionally tightened. At the time of additional tightening, the rotation limit of the ratchet lever is restricted by the stopper, and the rotation end does not project outside the peripheral surface of the printing cylinder, which is safe.

When removing the blanket, switch the switching mechanism,
Remove the blanket as the winding rod rotates and the blanket loosens.

〔Example〕

1 to 5 show an embodiment of a blanket winding device around a printing cylinder according to the present invention. FIG. 1 is a side view of an upper half of a blanket cylinder in which this is implemented, and FIG. 2 is FIG. AA sectional view of FIG. 3, FIG. 3 is a plan view as seen from B of FIG. 1, and FIG. 4 is C- of FIG.
C sectional view, FIG. 5 is a front view showing a part of the ratchet device cut away, and FIG. 6 is a sectional view of an essential part of the body circumference shown for explaining the blanket winding operation. In these figures, the wall surface 2 of the step portion provided inside the bearer 21a of the blanket cylinder 21
1b and 21c have a rectangular bearing plate 2 having a pair of bearing holes 22a.
2 is fixed by a plurality of bolts 23, and a restriction collar 24 having a hexagonal hole 24a is rotatably supported in each bearing hole 22a. 25 is a winding rod inserted through a hole 21d that is concentric with the hexagonal hole 24a that penetrates the body peripheral portion so as to be parallel to the body axis of the blanket cylinder 21, and the hexagonal heads 25a at both ends to the hexagonal hole 24a. It is fitted and is configured to rotate integrally with the limiting collar 24 while being pivotally supported in the bearing hole 22a of the bearing plate 22. At the center of the winding rod 25, a bush 26, which is formed in a semi-circular shape and fits into the hole 21, is fixed by a flat head screw 27. That is, the winding rod 25 is pivotally supported at three positions, that is, both ends and the central part, and the positions other than the pivotal support part are the holes 21.
A predetermined gap is formed between it and d as indicated by the symbol t in FIG. Further, the winding rod 25 is provided with a cut groove 25b for inserting a mouthpiece at the time of blanket winding, which will be described later, over the entire length of the corresponding portion of the hole 21d. Reference numeral 25c is another hexagonal head that is formed at the tip of the hexagonal head 25a and is used by a spanner when rotating the winding rod 25.

Such a winding rod 25 is provided with a forward / reverse switching ratchet device. That is, a ratchet wheel 28 is integrally fitted and fixed adjacent to the limiting collar 24 on the hexagonal head 25a to which the limiting collar 24 is fixed, and a tooth 28a is cut around the semicircle thereof. Has been. Reference numeral 29 denotes a ratchet lever which is swingably provided by rotatably fitting an inner circumference circle 29a to an outer circumference circle 28b of the ratchet wheel 28, and is drilled so that the inner circumference circle 29a and the axis line are orthogonal to each other. Pin hole 29b
A pin 30 with a knob 30a is slidably inserted therein, with its axis aligned with the tangent line of the ratchet wheel 28. The pin 30 is formed with a straight portion 30b extending along the axis and teeth 30c and 30d on both sides of the straight portion 30b. By advancing and retracting the straight portion 30b between the solid line position and the chain line position in FIG. And either tooth 30d or ratchet wheel 28 tooth 2 selectively
It is configured to mesh with 8a. Further, a pair of recessed holes 30e, 30f arranged in parallel in the axial direction are provided on the peripheral surface of the pin 30, and the ball hole provided on the pin hole 29b side is recessed by the forward / backward movement of the pin 30. A ball 31 that selectively engages with the holes 30e and 30f is loaded while being biased by a compression coil spring 32. With this configuration, when the pin 30 is in the solid line position, even if the ratchet wheel 28 together with the winding rod 25 tries to rotate in the direction of arrow C in the drawing, the tooth 28a causes the pin 30 to move into the pin hole 29b. The rotation of the teeth 28a, 30c is restricted by pressing them against the peripheral surface, and when they are rotated in the direction of the arrow D in the drawing, the teeth 28a, 30c are caused by the action of the ball 31 and the recess 30e.
The ratchet wheel 28, that is, the winding rod 25 is rotated while the pin 30 is slightly reciprocally rotated by repulsing the pin against the urging force of the compression coil spring 32. Further, when the pin 30 is moved to the position shown by the chain line and the ratchet wheel 28 is rotated in the direction of arrow C, the ball 31 is now engaged with the recess 30f and the teeth 28a, 30d are in mesh with each other. Causes the ratchet wheel 28 to rotate, and the ratchet wheel 28
Even if an attempt is made to rotate in the direction of arrow D, the rotation is restricted by the same action as described above. With this configuration, when the ratchet lever 29 is rotated in the direction of arrow D when the pin 30 is in the solid line position, the ratchet wheel is rotated.
The ratchet lever 29 is rotated together with the ratchet lever 28, and when the ratchet lever 29 is rotated in the direction of arrow C, the ratchet wheel 28 does not rotate until it stops. Further, when the pin 30 is moved to the chain line position, when the ratchet lever is rotated in the direction of arrow C, the ratchet lever 29 is integrally rotated with the ratchet wheel 28, and the ratchet lever 29 is moved to the arrow D. When rotated in the direction, ratchet wheel
28 rotates integrally. Reference numeral 33 is a jack bolt for additional tightening which is screwed into a screw hole provided at the free end of the ratchet lever 29 so as to be able to move forward and backward, and the end face of the head is brought into contact with the step bottom face 21e inside the bearer 21a. The ratchet lever 29 is configured to rotate in the arrow C direction and the arrow D direction, respectively, by inserting a wrench into the hexagonal hole 33a of the shaft center portion and moving it back and forth. On the wall surface 21b of the stepped portion, a stop pin 34 as a stopper is screwed into a screw hole and is planted. The rotation end of the ratchet lever 29 is brought into contact with the stopper pin 34 to limit its rotation in the additional tightening direction. It is configured so as to prevent an accident due to the regulation and the pivoting end protruding outside the peripheral surface of the blanket cylinder 21.

Between the limiting collar 24, which rotates integrally with the ratchet lever 29 of the ratchet device, and the bearing plate 22 on the body side, a click mechanism for restricting the rotation of the winding rod 25 at two positions, and a winding rod. A stopper for restricting both rotation ends of 25 is provided. That is, recessed holes 24b and 24c are provided at two positions on the circumferential surface of the limiting collar 24 with a phase difference of approximately 90 ° in the circumferential direction, and the stopper holes are provided in the ball holes provided on the bearing plate 22 side. The rotation of 24 selectively engages with one of the recessed holes 24b and 24c, and the ball 35, which constitutes a click mechanism together with the recessed holes 24b and 24c, is urged by the compression coil spring 36 toward the recessed holes 24b and 24c. Has been loaded. Then, the phase when the ball 35 engages with the one concave hole 24b is the phase when the cut groove 25b faces the waist circumference opening 21f, and the ball 35 engages with the other concave hole 24c. The phase at this time is a phase at the time when the temporary tightening of the blanket described later is finished and the additional tightening by the jack bolt 33 is started. In addition, limited color
A concave groove 24d shown in FIG. 2 is provided on the circumferential surface of 24 over a semicircle, and a stopper 37 that engages with the concave groove 24d is provided on the bearing 22 side. The rotation of the winding rod 25, which is integral with this, is restricted at both ends. One rotation end in this case is in the same phase as the engagement phase between the ball 35 and the concave hole 24b, and
The other rotation end is the phase when the winding rod 25 is rotated about 180 ° more than this.

Note that, in FIG. 2, the click mechanism and the stopper mechanism are illustrated as being provided on the same side, but actually, a pair of left and right click mechanisms are provided on the operating side, and the stopper mechanism is provided on the driving side. A left and right pair are provided. Of course, the ratchet device is provided on both the driving side and the operating side of the printing machine. In FIG. 6, 38 is a blanket, and 39 is a ferrule fixed to both ends of the blanket 38.

The operation of the blanket winding device configured as described above will be described with reference to FIG. Before starting the work of winding the blanket 38, as shown in FIG.
37 is engaged with one end of the concave groove 24d, and the ball 35 is engaged with the concave hole 24b so that the winding rod 25 is restricted from rotating. In this state, since the cut groove 25b of the winding rod 25 faces the waist circumference opening 21f, the gripper side mouthpiece 39 of the blanket 38 is inserted into the cut groove 25b from the waist circumference opening 21f to start the blanket 38 winding operation. To do. That is, when a wrench is applied to the hexagon head 24c and the winding rod 25 on the gripping side, which is the left side in FIG. 6 (a), is rotated by about 90 ° in the clockwise direction in the figure, the ball in FIG. Since 35 engages with the concave hole 24c, the winding rod 25 does not rotate, and therefore the mouthpiece 39 does not come out of the cut groove 25b. Therefore, when the blanket cylinder 21 is rotated once, the blanket 38 is wound around the peripheral surface of the trunk, so that the mouthpiece 39 on the hip side is cut into a groove.
Insert in 25b. FIG. 6 (a) shows this state. From this state, when the winding rod 25 on the right side of FIG. 6 (a) is turned counterclockwise by about 90 ° in the same figure, the state shown in FIG. 6 (b) is obtained. The rotation of the winding rod 25 is restricted by the click mechanism in the same manner as described above, and the blanket 38 is temporarily tightened. At the time of this temporary tightening, since the pin 30 of the ratchet device is in the position shown by the solid line in FIG. 5 and the ratchet lever 29 is fixed, the winding rod 25 moves in the direction of arrow D in the direction of temporary tightening of the blanket 38. The arrow C is rotatable and the tension of the blanket 38 acts.
Does not rotate in the direction. Therefore, insert a wrench into the hexagonal hole of jack bolt 33 and rotate it to operate ratchet lever 29.
Turn ratchet wheel 28 in the D direction in FIG.
Rotate integrally with each other in the direction of arrow D, and the winding rod 25 rotates as shown in FIG. 6 (c) to tighten the blanket 38 additionally. At this time, even if the winding rod 25 tries to rotate in the direction of the arrow C due to the tension of the blanket 38, it does not rotate because the jack bolt 33 is in contact with the bottom surface 21e. At the time of such additional tightening, a stop pin 34 as a stopper is screwed into a screw hole and is planted in the wall surface 21b of the step portion.
Since the ratchet lever 29 is brought into contact with the rotation limit of the ratchet lever 29 in the additional tightening direction, an accident caused by the ratchet lever 29 protruding from the peripheral surface of the blanket cylinder 21 to the outside can be prevented. For the additional tightening with the jack bolt 33, not only the holding side but also the rear side is normally rotated so that there is no insufficient tightening due to friction or the like.

When removing the blanket 38 thus mounted, pulling the pin 30 to the position of the chain line changes the engagement with the tooth 28a from the tooth 30c to the tooth 30d.
Becomes rotatable in the direction of arrow C, and the winding rod 25 integrated with the ratchet wheel 28 also rotates to loosen the blanket 38. Then, since the concave groove 24d hits the stopper 37 and the ball 35 engages with the concave hole 24b, when the winding rod 25 is rotated, the cut groove 2
The blanket 38 can be removed by pulling the mouthpiece 39 and the 5b faces the waist opening 21f. After this, push the pin 30 into the position indicated by the solid line for the next preparation, and move the ratchet lever.
After turning 29 in the direction of arrow C, jack bolt
Loosen 33 to the tightening start position. In this case the stopper
Since the 37 and click mechanism are separated from the ratchet lever 29, it is not necessary to fully return to the normal position for inserting the mouthpiece 39 as in the conventional case, and the return amount is small, and even if there is a difference in the return amount As described above, the cut groove 25b does not return to the normal position. When the blanket is attached next time, the ratchet lever 29 does not rotate until the winding rod 25 is rotated to the reference position for starting the additional tightening by inserting the mouthpiece 39 on the butt side as described above. It is sufficient to start the additional tightening with the bolt 33.

[Effect of device]

As is clear from the above description, according to the present invention, in the blanket winding device around the printing cylinder, the action direction of the ratchet teeth interposed between the additional tightening ratchet lever and the winding rod is set in the forward and reverse directions. A switching mechanism for switching is provided, and a blanket cap is inserted into the kerf, which is formed by a member fixed to the printing cylinder side and a member fixed to the winding bar on a bearing at a cylinder end portion that pivotally supports the winding rod. By attaching a click mechanism that selectively locks the rotation of the winding rod at either of the position and the additional tightening start position by the ratchet device, the blanket mouthpiece insertion position of the winding rod and the additional tightening start position are provided. Since the rotation restriction at both reference positions can be performed separately from the rotation operation of the ratchet lever, the operation amount of the additional tightening member for rotating the ratchet lever becomes smaller than the conventional amount. Moni, the operation amount of accuracy is improved operability without being requested. Further, the rotation range of the ratchet lever is reduced, and a space for hooking and unhooking the claws of the ratchet device is required. Therefore, the entire device can be made smaller and more compact than the conventional device. Further, since the rotation of the winding rod is locked by the click mechanism at the additional tightening start position, the blanket cap does not come off and the operability is improved. Further, since a stopper is provided on the printing cylinder to prevent the rotating end of the ratchet lever from projecting outside the peripheral surface of the printing cylinder,
Even when the ratchet lever is rotated during additional tightening, the ratchet lever does not project outside the peripheral surface of the printing cylinder, and accidents caused by the protruding part contacting a member outside the cylinder are prevented, improving safety. To do. Further, the rotation of the winding rod is restricted by the click mechanism at the blanket insertion position, so that the blanket can be easily inserted and the workability is improved.

[Brief description of drawings]

1 to 5 show an embodiment of a blanket winding device around a printing cylinder according to the present invention. FIG. 1 is a side view of an upper half of a blanket cylinder in which this is implemented, and FIG. 2 is FIG. AA sectional view of FIG. 3, FIG. 3 is a plan view as seen from B of FIG. 1, and FIG. 4 is C- of FIG.
C sectional view, FIG. 5 is an enlarged front view showing a part of the ratchet device by breaking it, FIG. 6 is a sectional view of an essential portion of the body circumference shown for explaining the blanket winding operation, and FIG. FIG. 8 is a side view showing a partially broken upper half of a blanket cylinder in which a blanket winding device for a printing cylinder is implemented, FIG. 8 is a developed plan view of the same main portion, and FIG. 9 is a vertical cross-sectional view of the central part of the cylinder. Is. 21 …… Blank barrel, 22 …… Bearing plate, 24 …… Stopper, 24a…
… Hexagonal hole, 25 …… Rolling rod, 25a …… Hexagonal head, 25b …… Groove, 28 …… Ratchet wheel, 28a …… Tooth, 29 …… Ratchet lever, 29b …… Pin hole, 30 …… Pin, 30b …… Straight section, 30c, 30d …… Tooth, 31 …… Ball, 32 …… Compression coil spring, 33 …… Jack bolt, 34 …… Stopper, 35…
… Ball, 38 …… Blanket, 39 …… Base.

Claims (1)

[Scope of utility model registration request] 1. An engaging portion of a tool for directly turning the winding rod is provided at an end portion of the winding rod which is inserted into a hole passing through a peripheral portion of the printing cylinder in a state parallel to an axial direction of the printing cylinder. Insert the mouthpiece of the blanket winding end into the groove extending along the ridgeline of the rod, rotate it while locking the return with the ratchet device provided at the protruding end of this winding rod, and then add with this ratchet device. In the blanket winding device around the printing cylinder that winds the blanket around the cylinder by tightening,
A switching mechanism, which is interposed between the ratchet lever for additional tightening of the ratchet device and the winding rod, switches a working direction of ratchet teeth between forward and reverse directions, and a stopper is provided on the printing cylinder side to rotate the ratchet lever. A member fixed to the printing cylinder side and a member fixed to the winding rod side are fixed to the bearing of the cylinder end portion that axially supports the winding rod while restricting the moving end from protruding outside the peripheral surface of the printing cylinder. And a click mechanism that selectively locks the rotation of the winding rod at either the blanket mouthpiece insertion position into the cut groove or the additional tightening start position by the ratchet device. A blanket winding device around the printing cylinder.