CN216804833U - Cutting adjusting device of web offset press - Google Patents
Cutting adjusting device of web offset press Download PDFInfo
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- CN216804833U CN216804833U CN202122576911.7U CN202122576911U CN216804833U CN 216804833 U CN216804833 U CN 216804833U CN 202122576911 U CN202122576911 U CN 202122576911U CN 216804833 U CN216804833 U CN 216804833U
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Abstract
The utility model discloses a cutting adjusting device of a web offset press, which comprises a driving mechanism, an adjusting roller and a pair of paper feeding rollers. The driving mechanism comprises a driving motor, a driving gear, a transmission shaft, two ball screw pairs and two bevel gear pairs; the driving motor is arranged on the outer side surface of the driving side small wall plate; the driving gear is arranged on a rotating shaft of the driving motor; the transmission gear is meshed with the driving gear; one end of the transmission shaft is connected with a mandrel of the transmission gear; the two screw rods are vertically arranged on one side of the transmission shaft; two longitudinal bevel gears are respectively arranged at two ends of the transmission shaft, and two transverse bevel gears are respectively arranged at one ends of the two screw rods; the adjusting roller is bridged on the two nut sleeves; a pair of paper-feeding rollers is parallelly mounted on another side of said drive shaft, and the distance between said paper-feeding rollers is identical to the diameter of regulating roller, and the centre of distance between said paper-feeding rollers and axle center of regulating roller are positioned on same horizontal plane. The utility model can be adjusted quickly and accurately.
Description
Technical Field
The utility model relates to a cutting adjusting device of a web offset press.
Background
The paper tape in the offset press is output from the last printing color group stamping area and conveyed to a folding unit for cutting and folding, the paper tape is transversely cut after being longitudinally folded, and strict requirements are imposed on the cutting position, namely the transverse cutting line is positioned on the central line of a blank area between two printed sheets, so that the size of the page after the signature is folded can meet the standard requirements (see figure 1). In order to do this, the distance of the web from the nip of the last printing couple cylinder to the transverse cutting line is critical for any type of machine, and must be an integer multiple of the length of the printed sheet.
In the actual printing process, due to various reasons such as paper tape stretching and machine adjustment, the position of the folding machine can be deviated when the paper tape is transversely cut off, so that the size of the signature does not meet the requirement of the printing surface. Therefore, the relative position of the correct cutting line of the paper tape to the cutting point of the cutting knife needs to be adjusted by adjusting the running length of the paper tape from the printing unit nip to the cutting cylinder cutting line through the adjusting roller.
The oscillating type adjusting roller devices are mostly used in the market at present and can be divided into manual type and electric type. The manual or electric regulating roller device has the following defects:
1. because the adjusting amount of the adjusting roller is more than half of the cutting length, and the swing amplitude of the adjusting roller is larger, the whole adjusting device can be made larger, the cost is relatively high, and the adjusting device also occupies a larger space;
2. the requirement on assembly is high, and the adjustment precision is slightly poor;
3. the adjusting roller adjusts the length of the paper tape by the swing amplitude, the adjusting amount of the adjusting roller changes in a nonlinear mode, and the adjusting value is difficult to quantify.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a cutting adjusting device of a roll paper offset press, which can be quickly and accurately adjusted and has a large adjusting range.
The purpose of the utility model is realized as follows: a cutting adjusting device of a web offset press is arranged on the paper feeding side of a paper folding machine matched with the offset press and comprises a driving side small wall plate, an operating side small wall plate, a driving mechanism, an adjusting roller and a pair of paper feeding rollers, wherein,
the driving side small wall board and the operation side small wall board are correspondingly arranged on the rear upper parts of a pair of wall boards of the folding machine one by one;
the driving mechanism comprises a driving motor, a driving gear, a transmission shaft, two ball screw pairs and two bevel gear pairs; the driving motor is arranged on the outer side surface of the driving side small wall plate through a support plate; the driving gear is arranged on a rotating shaft of the driving motor; the transmission gear is arranged between the small wallboard at the driving side and the support plate and is meshed with the driving gear; the transmission shaft is bridged between the small wall plate at the driving side and the small wall plate at the operation side, and one end of the transmission shaft penetrates through the small wall plate at the driving side to be connected with a mandrel of the transmission gear; the screw rods of the two ball screw pairs are vertically arranged on the inner side surface of the small wall plate at the driving side and the inner side surface of the small wall plate at the operating side together with the transmission shaft and are positioned at one side of the transmission shaft; longitudinal bevel gears of the two bevel gear pairs are correspondingly arranged at two ends of the transmission shaft one by one, and transverse bevel gears of the two bevel gear pairs are correspondingly arranged at one ends of the two screw rods one by one;
the adjusting roller is arranged in parallel with the transmission shaft and bridged on the nut sleeves of the two ball screw pairs;
and the paper feeding rollers are fixedly bridged between the small wall plate on the driving side and the small wall plate on the operating side one by one and are positioned on the other side of the transmission shaft, the distance between the paper feeding rollers is the same as the diameter of the adjusting roller, and the distance center of the paper feeding rollers and the axis of the adjusting roller are positioned on the same horizontal plane.
In the cutting adjusting device of the roll paper offset press, a speed reducer is further connected between the driving motor and the driving gear.
In the cutting adjusting device of the roll paper offset press, the nut sleeves of the two lead screw pairs are respectively provided with a guide hole under the threaded hole, the guide holes of the two nut sleeves are respectively inserted with a guide shaft, and the two guide shafts are fixedly arranged on the inner side surface of the small wall plate at the driving side and the inner side surface of the small wall plate at the operating side in a one-to-one correspondence manner.
According to the cutting adjusting device of the roll paper offset press, the inner side face of the small wall plate on the operation side is further provided with the two limit switches, and the two limit switches are located at two ends of the screw rod in a one-to-one correspondence mode.
The cutting adjusting device of the web offset press has the following characteristics:
1) the adjustment value is quantized through the control of the driving motor, so that the adjustment standards of any operators are consistent;
2) the production process can be quickly and accurately adjusted, so that waste is avoided;
3) the adjusting range is large; the length of the paper tape of one printed sheet can be adjusted;
4) the structure is simple and compact, and the occupied space is small.
Drawings
FIG. 1 is a schematic illustration of a trim line of a paper tape in an offset printing press;
FIG. 2 is a schematic view of the installation position of the cut adjustment device of the web offset printing press of the present invention;
FIG. 3 is a side view of the cut adjustment assembly of the web offset printing press of the present invention;
fig. 4 is a top view of fig. 3.
Detailed Description
The utility model will be further explained with reference to the drawings.
Referring to fig. 2 to 4, the cutting adjustment device 100 of the web offset press according to the present invention is installed on the paper feeding side of a folder 300 that is associated with the offset press 200, and includes a driving side small wall plate 101, an operating side small wall plate 102, a driving mechanism, an adjustment roller 2, two guide shafts 3, a pair of paper feed rollers 4, and two limit switches 5.
The driving side small wall panels 101 and the operating side small wall panels 102 are installed in one-to-one correspondence to rear upper portions of a pair of wall panels 301 of the folder 300.
The driving mechanism comprises a driving motor 11, a speed reducer 12, a driving gear 13, a transmission gear 14, a transmission shaft 15, two ball screw pairs and two bevel gear pairs; the speed reducer 12 is installed on a rotating shaft of the driving motor 11, and the driving motor 11 and the speed reducer 12 are installed on the outer side surface of the driving side small wall plate 101 through a support plate 12; the driving gear 13 is arranged on an output shaft of the speed reducer 12; the transmission gear 14 is arranged between the small wall plate 101 at the driving side and the support plate 10 and is meshed with the driving gear 13; the transmission shaft 15 is bridged between the small wallboard 101 at the driving side and the small wallboard 102 at the operation side, and one end of the transmission shaft 15 passes through the small wallboard 101 at the driving side and is connected with the mandrel of the transmission gear 14; the screw rods 16 of the two ball screw pairs are vertically arranged on the inner side surface of the small wall plate 101 on the driving side and the inner side surface of the small wall plate 102 on the operating side together with the transmission shaft 15 and are positioned on one side of the transmission shaft 15, and the nut sleeves 17 of the two ball screw pairs are also provided with a guide hole under the threaded hole; longitudinal bevel gears 18 of the two bevel gear pairs are correspondingly arranged at two ends of the transmission shaft 15 one by one, and transverse bevel gears 19 of the two bevel gear pairs are correspondingly arranged at one ends of the two screw rods 16 one by one;
the adjusting roller 2 is arranged in parallel with the transmission shaft 15 and is bridged on the nut sleeves 17 of the two ball screw pairs.
The two guide shafts 3 are inserted into the guide holes of the two nut sleeves 17 in a one-to-one correspondence, and the two guide shafts 3 are fixed to the inner side surface of the drive-side small wall plate 101 and the inner side surface of the operation-side small wall plate 102 in a one-to-one correspondence.
A pair of feed rollers 4 are fixedly bridged between the driving side small wall plate 101 and the operating side small wall plate 102 one above the other and are positioned on the other side of the transmission shaft 15, the pitch of the pair of feed rollers 4 is the same as the diameter of the adjusting roller 2, and the center of the pitch of the pair of feed rollers 4 is positioned on the same horizontal plane as the axis of the adjusting roller 2.
Two limit switches 5 are installed on the inner side surface of the small wall plate 102 on the operation side, and the two limit switches 5 correspond to two ends of the screw rods 15 located on the inner side surface of the small wall plate 102 on the operation side one to one.
The cutting adjusting device of the web offset press adopts a common motor as a driving motor 11, the rated rotating speed of the common motor is 1500rpm, and the speed reduction ratio of a speed reducer 12 is 1: 50, the gear ratio of the driving gear 13 to the transmission gear 14 is 36: 90, respectively; the gear ratio of the longitudinal bevel gear 18 and the transverse gear 19 of the bevel gear pair is 20: 20, the screw 17 of the ball screw pair is a trapezoidal screw, the screw pitch is 5mm, and the calculation shows that the adjusting roller 2 moves 0.04mm after the common driving motor 11 rotates for one circle, and the adjusting roller 2 moves 1mm after the common driving motor 11 rotates for one second.
The drive motor 11 may also be a servo motor, so that the two limit switches 5 can be eliminated. After the servo motor is adopted, the adjustment precision is higher, but the cost is increased correspondingly.
The cutting adjusting device of the web offset press of the utility model leads the paper tape 400 output from the last printing color group impression area of the press to firstly pass by the paper feeding roller 4 positioned below the adjusting roller 2 anticlockwise, then pass by the adjusting roller 2 clockwise, and then enter the drawing roller of the folding machine 300 after passing by the paper feeding roller 4 positioned above the adjusting roller 2 anticlockwise. When the cutting line of the paper tape 400 is cut at a later timing than the cutter of the folding machine 300, the dancer roller 2 needs to be moved in a direction away from the pair of feed rollers 3, and when the cutting line of the paper tape 400 is cut at a earlier timing than the cutter of the folding machine 300, the dancer roller 2 needs to be moved in a direction closer to the pair of feed rollers 4. When the adjusting roller 2 is adjusted, the speed reducer 12, the driving gear 13, the transmission gear 14 and the transmission shaft 15 are sequentially driven to rotate through the rotation direction of the driving motor 11, and the transmission shaft 15 drives the two ball screw pairs through the two bevel gear pairs, so that the adjusting roller 2 moves in the direction away from the pair of paper feeding rollers 4 or moves in the direction close to the pair of paper feeding rollers 4.
The utility model relates to a cutting adjusting device of a web offset press, which reduces the gear clearance between a driving gear 13 and a transmission gear 14 as much as possible when a driving motor 11 and a speed reducer 12 are installed; meanwhile, the axial play clearance is ensured to be as small as possible under the condition that the transmission shaft 15 rotates flexibly; the pitch clearance between the screw 16 and the screw sleeve 17 of the two ball screw pairs is also ensured to be consistent; and the clearance between the longitudinal bevel gear 18 and the transverse gear 19 of the two bevel gear pairs is ensured to be within 0.1mm, and pin holes are punched on the bevel gears for fixing after adjustment, so that the parallelism between the adjusting roller 2 and the pair of paper feeding rollers 4 is ensured.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (4)
1. A cutting adjusting device of a web offset press is arranged on the paper feeding side of a paper folding machine matched with the offset press and comprises a driving side small wall plate, an operating side small wall plate, a driving mechanism, an adjusting roller and a pair of paper feeding rollers,
the driving side small wall board and the operation side small wall board are correspondingly arranged on the rear upper parts of a pair of wall boards of the folding machine one by one;
the driving mechanism comprises a driving motor, a driving gear, a transmission shaft, two ball screw pairs and two bevel gear pairs; the driving motor is arranged on the outer side surface of the driving side small wall plate through a support plate; the driving gear is arranged on a rotating shaft of the driving motor; the transmission gear is arranged between the small wallboard at the driving side and the support plate and is meshed with the driving gear; the transmission shaft is bridged between the small wall plate at the driving side and the small wall plate at the operation side, and one end of the transmission shaft penetrates through the small wall plate at the driving side to be connected with the mandrel of the transmission gear; the screw rods of the two ball screw pairs are vertically arranged on the inner side surface of the small wall plate at the driving side and the inner side surface of the small wall plate at the operating side together with the transmission shaft and are positioned at one side of the transmission shaft; longitudinal bevel gears of the two bevel gear pairs are correspondingly arranged at two ends of the transmission shaft one by one, and transverse bevel gears of the two bevel gear pairs are correspondingly arranged at one ends of the two screw rods one by one;
the adjusting roller is arranged in parallel with the transmission shaft and bridged on the nut sleeves of the two ball screw pairs;
and the paper feeding rollers are fixedly bridged between the small wall plate on the driving side and the small wall plate on the operating side one by one and are positioned on the other side of the transmission shaft, the distance between the paper feeding rollers is the same as the diameter of the adjusting roller, and the distance center of the paper feeding rollers and the axis of the adjusting roller are positioned on the same horizontal plane.
2. The web offset printing press cutoff adjustment apparatus as recited in claim 1 wherein a speed reducer is further coupled between said drive motor and said drive gear.
3. The cutting adjustment device for web offset printing presses as claimed in claim 1, wherein the nut sleeves of the two spindle pairs are each provided with a guide hole directly below the threaded hole thereof, and a guide shaft is inserted into each of the guide holes of the two nut sleeves, and the two guide shafts are fixedly mounted on the inner side surface of the drive-side small wall plate and the inner side surface of the operation-side small wall plate in a one-to-one correspondence.
4. The cutting adjustment device of a web offset press according to claim 1, wherein two limit switches are further mounted on an inner side surface of the small operation side wall plate, and the two limit switches are located at both ends of the lead screw in a one-to-one correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122576911.7U CN216804833U (en) | 2021-10-25 | 2021-10-25 | Cutting adjusting device of web offset press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122576911.7U CN216804833U (en) | 2021-10-25 | 2021-10-25 | Cutting adjusting device of web offset press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216804833U true CN216804833U (en) | 2022-06-24 |
Family
ID=82049085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122576911.7U Active CN216804833U (en) | 2021-10-25 | 2021-10-25 | Cutting adjusting device of web offset press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216804833U (en) |
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2021
- 2021-10-25 CN CN202122576911.7U patent/CN216804833U/en active Active
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