JPS6312953Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for cutting paper into a predetermined width, that is, a slitter, and its purpose is to enable easy switching of the cutting width. .

The slitter that is the object of the present invention has two rotating blades each having cutting edges on their circumferential edges, and presses the side surfaces of these cutting edges against each other so that they are in mesh with each other, and by feeding paper into this meshing part, scissors can be cut. It cuts by applying the action of In conventional slitters, the mounting position of the rotary blade was moved when changing the cutting width, which resulted in a troublesome switching operation and the drawback that the mounting position was likely to be inaccurate. Ta.

The present invention solves the above-mentioned drawbacks, and includes:
A first shaft to which a plurality of rotary blades are fixed, a second shaft arranged parallel to the first shaft, and a third shaft.
a shaft, one movable rotary blade supported by the second shaft so as to be movable in the axial direction, and an operating mechanism supported by the third shaft and movable in the axial direction in a semi-fixed manner; The operating mechanism is interlocked with the second shaft and operates to move it away from the first shaft against the urging force, and is also interlocked with the movable rotary blade on the second shaft, By elastically moving it in the axial direction to apply a meshing force and semi-fixedly moving it, one of the plurality of rotary blades on the first shaft is moved out of the meshing position of the movable rotary blade. It is characterized by being selected as a partner.

Next, the present invention will be explained with reference to illustrated embodiments.
Lower rotary blades 1a and 1b are fixed to the drive shaft 2, and, for example, the lower rotary blade 1a is arranged at a position corresponding to an A4 size paper width, and the lower rotary blade 1b is arranged at a position corresponding to a B4 size paper width. Both ends of the drive shaft 2 are rotatably supported by side plates 3a and 3b that act as frames. Reference numeral 4 denotes an upper rotary blade that is slidably attached to the second drive shaft 5 and rotates together with the drive shaft 5 by the action of a key and a keyway 6. Both ends of the drive shaft 5 are rotatably supported by bearings 7a and 7b, and the bearings 7a and 7b are supported by side plates 3a and 3b so that they can move up and down, that is, in the direction of arrow C (the support structure is (Described later). Therefore, the drive shaft 5 can move up and down while remaining parallel to the drive shaft 2,
The upper rotary blade 4 can move left and right on the drive shaft 5.
8 is an operating shaft, and both ends thereof are connected to side plates 3a and 3b.
It is rotatably supported by bearings 9a and 9b attached to the drive shafts 2 and 5, and is arranged parallel to the drive shafts 2 and 5. Plate cams 10a, 1 are installed near both ends of the operating shaft 8.
0b is fixed. This plate cam 10a, 10
Cam follower pieces 11a and 11b that contact the cam edge of b
are fixed to the bearings 7a and 7b. Since the bearings 7a and 7b are urged downward by the springs 12a and 12b, the cam follower pieces 11a and
11b is the plate cam 10a, 10b due to this urging force.
in contact with the cam edge of the bearings 7a, 7b,
That is, the vertical position of the drive shaft 5 is the plate cam 10a,
10b. An arm 13 is fixed to one end of the operating shaft 8, and a spring 14 is stretched between the arm 13 and the side plate 3a so as to create a dead point. The operating shaft 8 is given a rotational force in the direction of arrow D or the opposite direction by the force of this spring 14.

A boss 15 and an end cam 17 are slidably attached to the operating shaft 8. The boss 15 and the end cam 17 are integrally connected by a U-shaped connecting piece 16. The boss 15 and the end cam 17 rotate together with the operating shaft 8 due to the engagement between the pin 18 and the keyway 19. Further, its axial position is click-adjusted by allowing a pin 20 provided on the boss 15 to fall into a groove 22 on the operating shaft 8 by the force of a leaf spring 21, as shown in FIG. The position of the groove 22 is determined corresponding to the position of the lower rotary blades 1a, 1b. A cam follower 23 is further loosely fitted onto the operating shaft 8. The cam follower 23 is disposed within the U-shaped connecting piece 16 and is biased toward the cam surface of the end cam 17 by the force of a spring 24 compressed between the cam follower 23 and the boss 15 . A fork 25 is fixed to the cam follower 23, and its bifurcated portion engages with an annular groove 26 provided in the boss of the upper rotary blade 4.

FIG. 6 shows a mechanism for transmitting power to the drive shafts 2 and 5. Reference numeral 27 denotes a motor serving as a driving source, which is fixed to the side plate 3a, and a sprocket wheel 28 is fixed to its shaft. A chain 29 is attached to the sprocket wheel 28, and the chain 29 is sequentially attached to the other four sprocket wheels 30, 31, 32, and 33 to rotate them in the direction of the arrow. A gear 34 is fixed to the sprocket wheel 33 and meshes with a gear 35 fixed to the end of the drive shaft 2. Sprocket wheels 30 and 32 are
It is fixed to the shaft of a transport roller (not shown).
Reference numerals 36 and 37 are shafts of pressure rollers (not shown) that pair with the conveyance roller, and are pressed down by springs 38 and 39, respectively. The conveying roller and the pressure roller serve to convey the paper to be cut while pinching the paper between them. A gear 40 is fixed to the sprocket wheel 31,
This meshes with a gear 41 fixed to the end of the drive shaft 5.

Here, the support structure for the drive shaft 5 and the operation shaft 8 is
This is supplemented by figures. Bearing 7 supporting drive shaft 5
a, 7b are supported by the side plates 3a, 3b so as to be able to move up and down, as described above, but this support is achieved by fitting the bearings 7a, 7b into vertical slits 42 provided in the side plates 3a, 3b. It is carried out by. Further, bearings 9a and 9b that support the operating shaft 8 are fitted and fixed into a circular hole 43 provided in the middle of the slit 42. The slits 42 are open at the upper ends of the side plates 3a, 3b, and the bearings 7a, 7b can be attached and detached from these open ends. The cam driven pieces 11a, 11b of the plate cams 10a, 10b that regulate the vertical positions of the bearings 7a, 7b have holes 4 into which the bearings 7a, 7b are fitted.
4 and a long hole 45 through which the bearings 9a, 9b pass. As shown in FIG. 8, the cam plates 10a and 10b have protrusions 46 and 47 following the cam edges, thereby restricting the rotation range of the operating shaft 8 to approximately 90 degrees.

Since the bearings 7a and 7b are movable up and down as described above, the drive shaft 5 and the gear 41 fixed thereto are
It is also possible to move up and down as shown in FIG. This vertical movement of gear 41 is not obstructed by gear 40 because gear 40 is positioned such that it occurs in the direction of the common connection of gears 40 and 41. However, the proper meshing state of both gears 40 and 41 is at the position shown by the chain line in FIG.
This is done at the lowest position of the drive shaft 5.

Next, the operation of the device will be explained.

Figure 1 shows the state in which paper is cut to the width of A4 size. The upper rotating blade 4 has a side surface of its cutting edge brought into close contact with a side surface of the cutting edge of the lower rotating blade 1a by a biasing force applied by a spring 24 via a fork 25. The drive shaft 2 is driven by a motor 27 via a chain 29 and gears 34 and 35, and rotates in the direction of arrow A, thereby rotating the lower rotary blades 1a and 1b in the same direction. The drive shaft 5 has a chain 29 and a gear 4
0 and 41, rotates in the direction of arrow B, and rotates the upper rotary blade 4 in the same direction. When the paper to be cut is fed from the front to the back in the figure by a conveyance roller (not shown) and reaches the area where the double rotary blades 1 and 4 engage, the scissors act due to the mesh between the double rotary blades 1 and 4. Cut into A4 size width.

When changing the cutting width from A4 size to B4 size, first operate the handle 48 provided on the boss 15 and rotate it in the opposite direction of arrow D. As a result, the boss 15, end cam 17, and operating shaft 8 rotate in the same direction. The rotation of the operating shaft 8 causes the arm 13 to rotate beyond the dead point, and the biasing direction of the spring 14 is reversed. As the operating shaft 8 rotates, the plate cams 10a and 10b rotate from the position shown in FIG. 8a to the position shown in FIG. pull up Therefore, the bearings 7a and 7b are connected to the spring 1.
2a and 12b, and the drive shaft 5 moves away from the drive shaft 2. In parallel with the above operation, the end cam 17 pushes the cam follower 23 to the left. That is, the cam follower 23 is connected to the fork 2 fixed thereto.
5 is engaged with the boss of the upper rotary blade 4, so it does not rotate regardless of the rotation of the operating shaft 8. On the other hand, the end cam 17 is fixed to the operating shaft 8 together with the boss 15 by the click mechanism shown in FIG.
No axial movement. As a result, the cam action of the end cam 17 pushes the cam follower 23 to the left. This movement of the cam follower 23 is transmitted to the upper rotary blade 4 via the fork 25 and causes it to move to the left on the drive shaft 5. Ultimately, the movement of the upper rotary blade 4 is caused by the upward movement of the drive shaft 5 and the cam follower 23.
The result is a combination of the leftward movement of , and the result is a direction diagonally upward as shown by arrow E.

Next, by operating the handle 48, while maintaining its rotational position, the boss 15 is moved to the left as shown in FIG. 3 against the locking force of the click mechanism.
It is engaged with the second click groove 22'.

Subsequently, when the handle 48 is rotated back in the direction of arrow D, the plate cams 10a and 10b are rotated back from the position shown in FIG. 8b to the position shown in FIG. 23 is released. As a result, the upper rotary blade 4 moves diagonally downward as shown by arrow F, and the lower rotary blade 1 for 4-size paper is moved diagonally downward as shown in FIG.
It becomes in mesh with b. In this state, the cam follower 23 is slightly apart from the end cam 17, and the biasing force of the spring 24 is applied to the lower rotary blade 1.
It is received by the side of the cutting edge of b, and this becomes the meshing force.

As described above, the engagement of the upper rotary blade 4 can be switched from the lower rotary blade 1a for A4 size to the lower rotary blade 1b for B4 size. The paper will be cut into B4 size pieces. During this switching operation, the upper rotary blade 4 retracts diagonally upward and descends diagonally downward to enter the meshing state, so that the blade edges of both rotary blades do not collide with each other, and there is no risk of damaging the blade edges.

10 to 14 show a second embodiment.

Drive shaft 2 to which two lower rotary blades 1a and 1b are fixed
is rotationally driven in the direction of arrow A, the drive shaft 5' is rotationally driven in the direction of arrow B, and the upper rotary blade 4 provided slidably on the shaft 5' is rotationally driven; A bearing 7 supporting the drive shaft 5'
a, 7b can move up and down, springs 12a, 1
As in the previous embodiment, it is urged downward by 2b.

The operating shaft 8' is supported rotatably and movably in the axial direction, and its axial position is different between A4 size and B4 size.
It is fixed with two clicks depending on the width of the paper. The operating shaft 8' has a cam 5 shown in detail in FIG.
6a and 56b are fixed. Cam 56a, 5
6b is provided with an arm-shaped cam surface 57. Cam surface 5
7 is a collar 60a, 60 loosely fitted to the drive shaft 5'.
It supports b. The cam surface 57 is arranged such that the distance from the operating shaft 8' increases from the base to the tip.

A boss 49 is further loosely fitted onto the operating shaft 8'.
The boss 49 has arms 50 and 51 at both ends thereof, which extend downward (see FIG. 14).
The arms 50 and 51 are each formed into a bifurcated shape. A cam surface 52 is formed at the end of the arm 51,
A pin 54 implanted in a rectangular collar 53 comes into contact with this. The rectangular collar 53 is loosely fitted onto the drive shaft 5' and is located within the bifurcated portion of the arm 51. Adjacent to this collar 53, the upper rotary blade 4 is attached to the drive shaft 5'. The upper rotary blade 4 rotates together with the drive shaft 5', but is movable in the axial direction.
A collar 55 is arranged inside the arm 50, and is loosely fitted onto the drive shaft 5'. A spring 58 is compressed between the collar 55 and the upper rotary blade 4.

Next, the operation of the device will be explained.

FIG. 10 shows a state in which cutting is being performed using an A4 size cutting width. The upper rotary blade 4 is biased by a spring 58 and its cutting edge engages with the side surface of the cutting edge of the lower rotary blade 1a, and cutting is performed by rotation of the drive shafts 2, 5' in the directions of arrows A and B.

To change the cutting width to B4 size, first operate the handle 59 provided on the operating shaft 8' to rotate the operating shaft 8' in the direction of arrow D. As a result, the arm-shaped cams 56a and 56b scoop up the drive shaft 5' via the collars 60a and 60b, so that the cam surface 57
Due to this action, the drive shaft 5' moves upward in the direction of arrow C.
This upward movement causes the pin 54 installed in the collar 53 to
However, it rides on the cam surface 52 provided on the arm 51 of the boss 49. Since the boss 49 is click-fixed in its position, it does not move, and the collar 53 moves to the left. As a result, the upper rotary blade 4 is pushed by the collar 53 and moves to the left. In the end, the upper rotary blade 4 is the first
As shown in Figure 1, move diagonally upward, that is, as indicated by arrow E.

Next, the handle 59 is operated to move the operating shaft 8' to the left against the locking by the click mechanism, and to fix it in the second position in a click manner. As a result, the upper rotary blade 4 moves to a position diagonally above the lower rotary blade 1b for B4 size, as shown in FIG.

Next, when the handle 59 is operated to rotate the operating shaft 8' in the direction opposite to the arrow D, the cams 56a and 5
As a result, the upper rotary blade 4 descends obliquely downward as shown by the arrow F, bringing the side of its cutting edge into intimate contact with the side of the cutting edge of the lower rotary blade 1b and into meshing engagement. Thus, by rotating the drive shafts 2 and 5', the cutting width becomes B4 size.

As described above, the present invention fixes a plurality of fixed rotary blades (the lower rotary blades 1a and 1b of the embodiment) on the same axis, and one movable rotary blade (the upper rotary blade of the embodiment) is fixed to one of them. 4) are selectively engaged, so when changing the cutting width, only the movable rotary blade needs to be moved. Therefore, the position of the fixed rotary blade can be maintained accurately, and the accuracy of the cutting width can be improved. Then, both the elastic movement in the axial direction for meshing required of the movable rotary blade and the relatively large movement in the axial direction for switching are performed by the second
The movement for switching is carried out on the axis.
This is achieved through semi-fixed movement of the operating mechanism, and elastic movement is performed based on the semi-fixed operating mechanism, so the structure does not become complicated and operates smoothly even though it performs two large and small movements. can be done.

[Brief explanation of drawings]

1 to 9 show a first embodiment of the present invention, in which FIGS. 1 to 4 are front views in different operating states, FIG. 5 is a vertical sectional view of the click mechanism, 6 is a perspective view of the drive mechanism, FIG. 7 is an exploded perspective view of the bearing portion, FIG. 8 is a side view of the plate cam portion, and FIG. 9 is a side view of the vicinity of the bearing. 1st
The following figures show the second embodiment, and the first
0 to 12 are front views in different operating states, FIG. 13 is a perspective view of the cam, and FIG. 14 is a perspective view of the main parts. 1a, 1b...Lower rotary blade, 2...Drive shaft, 4...
...Upper rotary blade, 5, 5'... Drive shaft, 8, 8'... Operation shaft, 10a, 10b... Plate cam, 17... End face cam, 52... Cam surface, 56a, 56b... Cam.

Claims (1)

[Scope of utility model registration request] A first drive shaft with a plurality of fixed rotary blades, a second drive shaft, and an operation shaft are arranged in parallel, and one movable blade is attached to the second drive shaft so as to be slidable in the axial direction, and is operated. A cam member is installed between the shaft and the second drive shaft to move the second drive shaft in parallel in a direction that moves the second drive shaft away from the first drive shaft against the urging force by rotation of the operating shaft,
A cam member that moves the movable blade of the second drive shaft in the axial direction in conjunction with the rotation of the operating shaft against a biasing force in the direction of engagement; A slitter that is equipped with means for semi-fixing one rotary blade in a click-like manner with a constant pressing force, so that one movable blade can be engaged with one of a plurality of rotary blades for cutting.