JPH0329558B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application and Summary of the Invention] The present invention relates to a so-called three-way cutting device for finishing cutting the top, bottom and edges of notebooks, books, etc. The product take-out sections are arranged on a circumference, and one unit of work is always pressed against a workpiece mounting table (bed) in the entire area where the sections move,
This improves cutting accuracy and increases cutting speed.

[Prior art and its problems] Conventionally, as a three-sided cutting device, one in which top and bottom cutting and edge cutting are performed in one device is already known.

In this conventional type, the workpiece W is placed on a bed B as shown in FIGS. 11 and 12, and the first cutting blades 2, 2 for vertical cutting are arranged above the bed B, and the first cutting blades 2, 2 for vertical cutting are arranged. A second cutting knife 3 is arranged,
Furthermore, a pressing device 4 is disposed above the workpiece W mounting section. Each of the above parts is designed to operate at predetermined timing, and the workpiece W is placed on the bed B.
When the cutting device is placed in the operating state, the top, bottom and edges are cut in the following steps.

The press plate 41 of the pressing device 4 moves downward to strongly press the workpiece W against the upper surface of the bed B, and the position of the workpiece W with respect to the bed B is fixed.

Next, the pair of first cutting blades 2, 2 descend to the workpiece W fixed on the bed B, and the top and bottom portions of the workpiece W are finished cut.

When the cutting is completed and the first cutting blades 2, 2 return to their initial positions, the second cutting blade 3 moves downward to cut the edge of the workpiece W.

When the cutting is completed and the second cutting blade 3 returns to its initial position, the press plate 41 returns to its upward position and the product can be taken out.

As described above, the conventional method has the advantage that the top, bottom and edge cutting can be completed by one device.

However, this conventional device has a problem in that it takes a long time to cut into three sides.

This is because a waiting time is required until the workpiece W is pressed onto the bed B by the pressing device 4 and the workpiece W is completely fixed.

That is, since the workpiece W is usually a stack of many paper sheets, there is a slight air layer between each sheet, and until the pressing by the pressing device 4 is completed, The air must be allowed to escape. This is because if the press plate 41 is strongly pressed before the escape of the air is completed, the sheets constituting the workpiece W may be displaced from each other. Therefore, when pressing the workpiece W by the pressing device 4, for a certain period of time at the initial stage of the pressing, the press plate 41
The procedure is to lightly press the press plate 41 against the workpiece W, wait for the air in the workpiece W to be discharged, and then firmly press the press plate 41. As a result, the first cutting knife 2, 2
It takes a long time to prepare for cutting with the second cutting knife 3, and the time required for cutting increases accordingly.

[Technical Problem] The present invention is directed to the following method: ``A workpiece W in which a large number of paper sheets are stacked is placed on a bed B, the workpiece W is pressed and fixed to the bed B by a press plate 41, and the In order to shorten the time required for cutting in a so-called three-way cutting device that cuts the top, bottom and edges of a workpiece W by matching a cutting knife to the workpiece W in the state,
The technical problem is to avoid the waiting time required to press and fix the bed B to the bed B.

[Technical Means] _The technical means _of the present invention taken to solve the above-mentioned technical problems are as follows. Second cutting section S ₃
and product discharge sections _S4 are provided at equal intervals on a constant circumference, and sets of beds B and press plates 41 of the same number as each section are provided so as to match the sections, and the plurality of beds B and press plates 41
The sets are configured to integrally rotate intermittently at a fixed timing, and the rotation angle of one step of the intermittent rotation is set so that the stop position of the set of bed B and press plate 41 coincides with each section. , the press plate 41 is in a descending state where it opposes the workpiece W with a constant urging force in the section from when the workpiece W is loaded into the bed B at the input section _S1 until it is discharged at the product discharge section _S4 . The structure is such that it operates as if it were in the ascending return state outside this section, and each cutting section is provided with a pressing device 40 for strongly pressing the press plate 41, and this pressing device 40 is used during the cutting operation of the cutting blade. The timing of its operation was set so that it was in the pressed state.

[Operation] The above technical means of the present invention operates as follows.

When the press plate 41 descends in the input section _S1 , the workpiece W loaded into the input section _S1 is pressed against the bed B with a constant urging force by the pressing force of the press plate 41. Ru. The combination of the press plate 41 and the bed B remains in a stopped state until the cutting operation in the other sections is completed. Next, after the cutting in the first cutting section _S2 and the second cutting section _S3 is completed, the set of the press plate 41 and bed B is rotated toward the first cutting section _S2 at a predetermined timing. Once the cutting section S ₂ matches, it will stop at this position. During the period from when the press plate 41 descends in the previous process until it moves to this stop position, the workpiece W is pressed by the press plate 41 with a constant urging force, and during this period, the air inside the workpiece W is is discharged by the pressure.

Press plate 41 in accordance with the first cutting section S ₂
When the bed B and the bed B stop, the pressing device 40 disposed in this section operates and presses the press plate 4.
Press 1 even harder. As a result, the workpiece W is strongly pressed and fixed to the surface of the bed B. In this fixed state, the first cutting blades ₂ , 2 operate in the first cutting section S2, and the top and bottom of the workpiece W are finished cut.

When this cutting is completed and the first cutting blades 2, 2 rise and return to their initial positions, the pressing device 40 also returns to its initial state and the strong pressing state caused by this is released, and the workpiece W is subjected to the pressing force of the press plate 41. As a result, only the sheet is pressed against the bed B, and when the combination of the press plate 41 and the bed B rotates by a certain angle in this state, it coincides with the next second cutting section _S3 . In this section, the same operation as in the first cutting section _S2 proceeds, and the workpiece W is moved by the pressing device 40.
is strongly pressed, the second cutting blade 3 performs the edge cutting, and after the cutting is completed, the second cutting blade 3 and the pressing device 40 return to their initial states, and the workpiece W is held in bed only by the press plate 41. It will be in a state where it is pressed by B.

Next, the set of press plate 41 and bed B is moved to the product discharge section _S4 , and when these are stopped, the press plate 41 returns to the upper position, the press by the press plate 41 is released, and the product discharge section is moved to the product discharge section S4.
The product is discharged from bed B by the discharge device installed in _S4 .

When the ejection is completed, the press plate 41 remains raised and moves to the input section S ₁ together with the bed B.
When the next workpiece W is placed on the bed B, the press plate 41 descends and presses this workpiece W.

Thereafter, the above-described series of operations is repeated until the three-way cutting is completed while the press plate 41 and bed B rotate once. Furthermore, since the sets of bed B and press plate 41 are arranged to correspond to each section, cutting of the previous section can be completed in the time required for one cutting process, and the workpiece can be cut easily. All processes from the input of W to the discharge of the product are completed.

[Effects] Since the present invention has the above configuration, it has the following unique effects.

The air inside the work W is discharged by the pressure during the period from when the press plate 41 descends after the step of loading the work W until it moves to the stop position of the first cutting section _S2 . There is no waiting time required for discharge, and cutting work can be done faster than conventional methods.

Further, since a series of steps from inputting the workpiece W to discharging the product is completed in the time required for cutting, three-way cutting can be performed at high speed in this respect as well.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 10.

The three-way cutting device of the illustrated embodiment has a general configuration as shown in FIGS. 1 to 4, and can simultaneously perform top and bottom finishing cutting, edge finishing cutting, and rounding of two corners. The device for cutting round corners is installed in the product discharge section _S4 .

In addition, in the device of this embodiment, as shown in FIG.
The press plate 41 and the bed B are arranged in four sets, and input sections S ₁ to product discharge sections S ₄ are arranged in a horizontal plane, and a main shaft 1 that rotates intermittently is provided at the center of these sections. The intermittent rotation of the main shaft 1 causes the bed B and the press plate 41 to move intermittently from the input section _S1 to the product discharge section _S4 , and then return to the input section _S1 . Furthermore, the four press plates 41, 41 attached to the main shaft 1 are adapted to move up and down along the main shaft 1, and are raised and lowered at the timing of description.

The details of each part will be explained below.

Regarding the main shaft 1 and drive, the main shaft 1 arranged as described above is held in an upright position at the center of the vessel F and is driven by a motor M. A speed reducer C and a roller gear G are interposed between the motor M and the motor M to rotate intermittently at predetermined timings. Thereby, the rotation angle, rotation speed, and stop interval of one step of the main spindle 1 are set.

Therefore, the four sets of work holding devices consisting of the press plate 41 and the bed B connected to the main spindle 1 rotate synchronously in accordance with the intermittent rotation of the main spindle 1.

In addition, in order to improve the accuracy of the correspondence between the first cutting blades 2, 2 and the second cutting blade 3 at the stop position of the bed B in each section, a bed position detection device may be provided in addition to the intermittent rotation method using the above device. It is also possible to adopt a method in which the rotational operation of the spindle 1 is stopped based on the output from this detection device, and this stopping time is set constant in relation to the cutting operation.

In short, various known intermittent rotation devices can be used as long as the rotation of the main shaft 1 is stopped when the bed B and the press plate 41 are set in the proper position, and this stopped state is maintained for a certain period of time. be.

Lifting device for press plate 41 As mentioned above, each press plate 41 is
In this embodiment, the press plate 41 has an arm 43 attached to the upper end of a pair of lifting shafts 42, 42, which are paired with each other, so that the press plate 41 moves parallel to the main shaft 1. The press plate 41 is located above the bed B which is directly attached to the main shaft 1, and moves up and down in synchronization with the lifting shafts 42, 42. Further, a spring 47 is attached to each lifting shaft 42, 42 to bias it in the downward direction.

A pair of lifting shafts 4 with each press plate 41 attached
The lower end of 2,42 is a lower space R provided in the vessel F.
The lower ends of the protrusions are connected to each other by a backing plate 44, which faces two air cylinders 45 and 46 provided below at a predetermined position. The air cylinder 45
is provided at a position that corresponds to the backing plate 44 when the press plate 41 coincides with the input section _S1 ,
The other air cylinder 46 is provided at a position corresponding to the backing plate 44 when the press plate 41 coincides with the product discharge section _S4 . The patch plate 44 has an arcuate planar shape and is disposed continuously on a constant circumference.
The distance between 4 and 44 is set slightly.

With the above configuration, when the press plate 41 is located at the input section S ₁ , the backing plate 44 faces the output shaft of the air cylinder 45 , and in the initial state, the backing plate 44 is lifted by the output of the air cylinder 45 . in a state of
When the workpiece W is placed between the bed B and the press plate 41, the signal at this time causes the air cylinder 45 to return or the driving pressure to disappear, and the press plate 41 is moved by the biasing force of the spring 47. It is forced to descend. As a result, the press plate 41 lightly presses the workpiece W with a constant pressure.

Further, the pressing state continues until the press plate 41 moves to the product discharge section _S4 , and when the corner cutting is completed in the product discharge section _S4 , the other air cylinder 46 is activated by the signal at this time. , the output shaft of the air cylinder 46 comes into contact with the press plate 44, and the pressing plate 44 is lifted and the pressure from the press plate 41 is released.

Regarding the top and bottom cutting device, the top and bottom cutting device provided in the first cutting section _S2 is similar to the conventional one, and the top and bottom portions of the workpiece W are finished cut by the swing operation of the first cutting blades 2, 2.

The difference from the conventional cutting device is that, as shown in FIG. This is because a support stand 21 is provided to support from
The distance between the height of the support stand 21 and the lower surface of the bed B is set to be extremely small.

The other pressing device 40 consists of a pressing rod 48 and a hydraulic cylinder 49 that drives it up and down, and while the first cutting blades 2, 2 are cutting, the pressing rod 48 holds the bed B on the upper surface of the support base 21. The workpiece W is strongly pressed against the upper surface of the bed B, and is driven up and down at a predetermined timing by a hydraulic cylinder 49 provided on the upper frame 10 of the vessel F.

Therefore, the workpiece W is connected to the bed B and the press plate 41.
The first cutting section is compressed by the
When it is moved to S ₂ and stopped at the proper position,
The vertical cutting progresses while the workpiece W is strongly pressed by the pressing device 40.

Edge Cutting Device The edge cutting device provided in the second cutting section S ₃ is similar to the conventional one, and final cutting of the edge portion of the workpiece W is performed by swinging the second cutting blade 3 .

The constructions of the pressing device 40 for strongly pressing the workpiece W onto the bed B during edge cutting and the support stand 21 for supporting the pressing force are the same as in the first cutting section _S2 .

Therefore, in this second cutting section _S3 as well, while the second cutting knife 3 performs the edge cutting operation, the pressing device 40 strongly presses the workpiece W placed on the bed B, and this pressing force is applied to the bed. The paper is supported by the opposing support bases 21 for a very short time below B, and the pressure by the pressure device 40 is released after cutting is completed. Thereafter, the bed B is rotated to the product discharge section _S4 .

Regarding the bed B, as mentioned above, the bed B is intermittently rotated by the main shaft 1, but this bed B is attached to an arm projecting in the radial direction from the main shaft 1, and has a certain degree of elasticity. have This allows the bed B and the support base 21 to come into contact with each other in the first cutting section _S2 and the second cutting section _S3 .

Also, on the top surface of bed B, as shown in Figure 5,
Backing materials 50, 50 commonly called pillows are placed, and the cutting edge portions of the first cutting blades 2, 2 and the second cutting blade 3 for cutting come into contact. These backing members 50, 50 are arranged in a rectangular shape so as to match the periphery of the workpiece W, and the upper surface of each backing member forms one plane. Then, in the input section _S1 , on the plane, the peripheral edge of the workpiece W and the backing material 50,
The work W is loaded and placed so that the numbers 50 and 50 coincide with each other.

Regarding the corner rounding cutting device, the conventional corner rounding cutting device has a configuration as shown in Figs. 6 and 7, and the corner rounding cutting blade 5 is made of a square material whose entire lower outer surface is an inclined surface inclined toward the inner side. , a concave groove 51 corresponding to the rounded corner to be cut is formed in the center of the inner surface of this square material, and the other bed B
A raised part 53 for placing the workpiece W is formed on the upper surface, and the part of this raised part 53 facing the rounded corner cutting blade 5 has a rounded corner part 52 that corresponds to the rounded cut part of the workpiece W. This rounded corner 52
The rounded corner cutting blade 5 moves up and down in a state where the groove 51 and the groove 51 are in contact with each other. Therefore, the workpiece W is placed on the raised portion 53.
When the rounded corner cutting blade 5 is lowered with the work W placed thereon, the corner of the workpiece W is cut into rounded corners by the cutting edge formed by the groove 51 and the lower inclined surface.

However, this conventional corner cutting device cannot be used in the three-way cutting device of the present invention. When vertical cutting and edge cutting are performed on the top surface of the same bed B, if the above-mentioned rounded corner cutting method is adopted, the cutting edge portion 54 will come into contact with the corner portion of the workpiece W during the vertical cutting and edge cutting. This is because there is no flat part. This is because if the abutting surface is a flat surface, the cutting edge portion 54 will have an inverted U-shape as shown in FIG. 7, and will not be cut.

Therefore, in this embodiment, the corner-rounding cutting blade 5 is constructed as shown in FIG. 8, and the cutting edge portion 54 at the lower end forms a plane perpendicular to the direction of elevation. When this rounded corner cutting blade 5 is adopted, the corner portion of the workpiece W is shaped into a predetermined shape with the cutting edge portion 54 at the lower end of the rounded corner cutting blade 5 being in contact with the upper surface of the backing materials 50, 50 placed on the bed B. This means that it can be cut into pieces.

Next, in this embodiment, the corner round cutting blade 5,
Both ends of the cross-sectional shape of the concave groove 51 of No. 5 are set at an obtuse angle as shown in the figure, and the cutting edge portion 54 has an arc-shaped extension from both ends of the cutting line input section S ₁ and the top and bottom cutting sections. Line first cutting section S ₂
It is designed to extend outward.

When the shape of the cutting edge portion 54 is set to a quarter arc, the rounded corner will not continue smoothly with the other sides unless the fore edge line and top/bottom line match the arc exactly. However, when adopting the rounded corner cutting blade 5 having the above configuration, even if the position of the rounded corner cutting blade 5 with respect to the workpiece W is shifted, the rounded part continues almost smoothly to two adjacent sides. becomes.

The elevating device for the rounded corner cutting blades 5, 5 of this edge cutting device is constructed as shown in FIGS. 9 and 10,
Blocks 57, 57 of a frame body 56 whose both ends are movably raised and lowered against a pair of guide shafts 55, 55.
Corner round cutting blades 5 are individually connected to the lower surface of the . The frame body 56 is driven up and down by a lifting drive device that operates at predetermined timing, and when the lifting device moves up and down while the workpiece W is set in the product discharge section _S4 , The corner cutting blade 5 is pushed into the rounded corners of the workpiece W to cut the corners into rounded parts.

In this embodiment, the product discharge section S ₄ is also equipped with a pressing device 40 in the same way as the first cutting section S ₂ and the second cutting section S ₃ , so that the precision of rounding corners is increased.

Regarding the drive system, in the apparatus according to the embodiment of the present invention, one motor M is used to perform ground cutting, edge cutting, and corner round cutting, and furthermore, to rotate the beds B and B. For this, the transmission relationship shown in Fig. 4 is adopted.

The motor M is transmitted with the input shaft of the reduction gear C, and the output shaft 22 of the reduction gear C is equipped with cranks K ₁ and K ₁ of the crank device K for driving the first cutting blades 2 and 2. In addition, the input shaft 23 of the roller gear G for driving the main shaft 1
It is transmitted through a chain. Further, one crank K ₁ is connected to rotate together with a crank K ₂ of a crank device K for edge cutting, and the cranks K ₁ ,
The top dead center position of _K2 is set to a predetermined value.

As a result, due to the rotation of cranks K ₁ and K ₁ ,
In the first cutting section _S2 , a pair of first cutting blades 2, 2, which are formed by a four-bar linkage mechanism with the vessel F as one joint, swing synchronously to cut the top and bottom of the workpiece W. Further, due to the rotation of the crank _K2 , in the second cutting section _S3 , the second cutting blade 3, which also has a four-bar linkage mechanism, operates to cut the edge of the workpiece W.

Next, cams D and D are attached to the input shaft 23 of the roller gear G, and the cams D and D are linked to the swinging arm 24 that is linked to the frame 56, and are lowered and lowered at certain times during one rotation of the input shaft 23. The machine moves upward and cuts corners with rounded corners.

The frame 56 lowered by the swing arm 24 is equipped with a spring (not shown) for returning to the upper position, and the rounded corner cutting blades 5, 5 are always biased in the upward direction. There is.

The operation of each of these parts is performed at a constant timing during one rotation of the output shaft 22 of the reduction gear C, but this operation is related to the rotation of the main shaft 1, which is the output shaft of the roller gear G. When the spindle 1 is in a stopped state, that is, each set of bed B and press plate 41 is in the loading section S ₁ ~
Each cutting operation ends when the product discharge section _S4 is in a stopped state.

In the product discharge section _S4 , in addition to the corner rounding operation, the product discharge operation is completed during the stop period of the main spindle 1. This product discharging operation is caused by the operation of a discharging finger 58 driven by an air cylinder or the like, and the discharging operation progresses in response to a signal at the end of corner round cutting, and the product on bed B is discharged. It is transferred to a discharge conveyor 59 provided in section _S4 .

[Brief explanation of the drawing]

Figure 1 is a plan view of the embodiment of the present invention, Figure 2 is its front view, Figure 3 is its side view, Figure 4 is an explanatory diagram of its drive system, Figure 5 is a detailed view of bed B, and Figure 5 is a detailed diagram of bed B. 6
The figure is an explanatory diagram of the conventional rounded corner cutting, FIG. 7 is an explanatory diagram of the corner rounded cutting blade 5 used for this, and FIG. 8 is the corner rounded cutting blade 5 and the padding material 50 of the corner rounded cutting part of the embodiment of the present invention. FIGS. 9 and 10 are explanatory diagrams of the entire rounded corner cutting section, and FIGS. 11 and 12 are explanatory diagrams of the conventional example. In the figures, B...bed, W... Workpiece, S ₁ ... Input section, S ₂ ... First cutting section, S ₃ ... Second cutting section, S ₄ ... Product discharge section, 4
0...Press device, 41...Press plate.

Claims (1)

[Claims] 1. Place a work W in which a large number of paper sheets are stacked on the bed B, press and fix the work W to the bed B by a press plate 41, and make a cutting blade correspond to the work W in the fixed state. In a so-called three-way cutting device that cuts the top, bottom and edges of the workpiece W, there is a feeding section S ₁ that places the workpiece W on bed B, and a first cutting section that cuts the top and bottom.
S ₂ , a second cutting section S ₃ for cutting edges, and a product discharge section S ₄ are provided at equal intervals on a certain circumference, and a set of bed B and press plate 41 similar to each section is aligned with the section. The plurality of bed B and press plate 41 sets are configured to integrally rotate intermittently at a fixed timing, and the stopping position of the bed B and press plate 41 set coincides with each section. The rotation angle of one step of the intermittent rotation is set to , and the press plate 41 does not hold the workpiece W in the section from when the workpiece W is loaded into the bed _B at the input section S1 until it is discharged at the product discharge section _S4 . In the descending state where the press board 41 is in contact with a certain biasing force, the structure operates as if it were in the ascending return state except in this section, and each cutting section is provided with a pressing device 40 for strongly pressing the press plate 41. This is a three-way cutting device in which the operating timing is set so that the pressing device 40 is in a pressed state during the cutting operation of the cutting blade.