Paper roll mounting device of printing machine

Abstract

The utility model discloses a paper roll mounting device of a printing machine, which can save paper roll replacement time. The paper roll mounting device comprises a paper roll roller which is bridged between two bearing assemblies through a quick-change mechanism. The quick change mechanism comprises two rotating shafts, two switch wheels, a rotating hand wheel, a paper roll driving motor and two press-in type ball plungers; the inner end face of the rotating shaft is provided with a pair of centering blind holes and extends to form a chord plane arch-shaped section with a U-shaped groove in the center; the switch wheel sleeves the rotating shaft and comprises a switch wheel main body and a split ring; the rotating hand wheel is fixed on the outer end face of one rotating shaft; the paper roll driving motor is connected with the outer end of the other rotating shaft; the two press-in type ball plungers are mounted in the centering blind holes of the two rotating shafts; the mandrel heads at the two ends of the paper roll roller are embedded into the U-shaped grooves in the two rotating shafts till the ball heads of the two press-in type ball head plungers are embedded into the embedding grooves formed in the two end faces of the paper roll roller, and the switch wheel is rotated to enable the opening rings to close the groove openings of the U-shaped grooves. According to the utility model, the replacement time of the paper roll is saved.

Description

Technical Field

[0001] The utility model relates to a paper roll installation device for a printing press. Background Art

[0002] In traditional printing presses, when replacing a paper roll after it runs out of paper, the bearing blocks connecting the two ends of the paper roll core must be removed to remove the core and replace the paper roll. This method is not only time-consuming and labor-intensive, but also easily affects the overall calibration position of the printing press. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a paper roll installation device for a printing press, which can install and remove the paper roll without changing the working state of the printing press, saving the time of paper roll replacement and reducing the labor intensity of the operator.

[0004] The purpose of the utility model is achieved as follows: a paper roll mounting device for a printing press, comprising a paper roll frame consisting of two frame side plates and a frame bottom plate, two bearing assemblies mounted in bearing mounting holes of the two frame side plates in a one-to-one correspondence, and a paper roll roller connected between the two bearing assemblies via a quick-change mechanism;

[0005] The quick-change mechanism includes two rotating shafts, two switch wheels, a rotating hand wheel, a paper roll drive motor and two press-in ball plungers; wherein,

[0006] Each of the rotating shafts comprises an inner shaft section, a middle shaft section and an outer shaft section which are connected in sequence from large to small in outer diameter; the middle shaft section is coaxial with the outer shaft section; the inner shaft section is eccentric with the middle shaft section; a centering blind hole which is coaxial with the middle shaft section is provided on the inner end surface of the rotating shaft; a bow-shaped section with a rib extends coaxially from the inner end surface of the inner shaft section, the outer peripheral surface of the bow-shaped section with a rib is a superior arc surface and the radius is the same as the radius of the inner shaft section, a U-shaped groove with a depth greater than the radius of the bow-shaped section with a rib is provided at the center of the chord plane, the central axis of the U-shaped groove intersects with the axis of the centering blind hole, a radial blind hole which is symmetrical with the center of the U-shaped groove is provided on the outer peripheral surface of the bow-shaped section with a rib, and a compression spring and a steel ball are inserted into the radial blind hole in sequence;

[0007] The inner diameter of the switch wheel is adapted to the outer diameter of the inner section of the rotating shaft. The switch wheel includes a switch wheel body and an open ring extending coaxially from the inner end surface of the switch wheel body. The opening width of the open ring is greater than the width of the U-shaped groove of the arcuate section with a retaining edge on the rotating shaft. A first limiting groove is axially defined on the inner circumference of the switch wheel and is symmetrical with the opening center of the open ring. A second limiting groove is also axially defined on the inner circumference of the switch wheel, with an angle greater than 90° and less than 150° with the first limiting groove.

[0008] The switch wheel is sleeved on the rotating shaft from the outer end thereof, so that the open ring and the switch wheel body are located on the arcuate section with the rib and the inner section of the rotating shaft in a one-to-one correspondence, and the steel ball in the radial blind hole on the rotating shaft is embedded in the first limiting groove on the inner circumferential surface of the switch wheel by the elastic force of the compression spring;

[0009] After the switch wheels are installed on each of the two rotating shafts, they are inserted into the two bearing assemblies one by one from the inner sides of the two frame side plates, so that the outer sections of the rotating shafts protrude from the outer sides of the frame side plates, and the switch wheels on the two rotating shafts are located on the inner sides of the two frame side plates, and the openings of the split rings and the notches of the U-shaped grooves on the arched sections with ribs are both facing upwards;

[0010] The rotating hand wheel is fixed to the outer end surface of a rotating shaft by screws;

[0011] The paper roll drive motor is mounted on the outer side of a frame side plate through a motor seat and is connected to the outer section of the rotating shaft of another rotating shaft through a coupling;

[0012] The plungers of the two pressed-in ball plungers are installed in the aligned blind holes of the two rotating shafts in a one-to-one correspondence;

[0013] A core shaft head extends coaxially from each end face of the paper roll; the core shaft head is the remaining portion of a cylinder after two identical inferior fox bow segments are removed symmetrically from the center, and the width of the core shaft head is adapted to the width of the U-shaped groove on the arched segment with a retaining edge of the rotating shaft, and the diameter of the core shaft head is adapted to the distance from the axis of the centering blind hole on the rotating shaft to the inner wall of the switch wheel; the center of the outer end face of each of the two core shaft heads is provided with an arc-shaped groove adapted to the ball head of the press-in ball plunger;

[0014] First, insert the core shaft heads at both ends of the paper roll into the U-shaped grooves on the two rotating shafts from top to bottom until the ball heads of the two press-in ball plungers are embedded in the embedding grooves at both ends of the paper roll. Then rotate the two switch wheels and rotate the two rotating shafts in opposite directions so that the open rings on the two switch wheels close the notches of the U-shaped grooves on the two rotating shafts one by one until the steel balls in the radial blind holes on the rotating shafts are embedded in the second limiting grooves on the inner circumference of the switch wheels through the elastic force of the compression spring, so that the two ends of the paper roll are firmly connected to the two rotating shafts one by one.

[0015] In the above-mentioned paper roll installation device for a printing press, a threaded blind hole for engagement with the screw is provided at the center of the outer end surface of a rotating shaft connected to the rotating hand wheel.

[0016] In the above-mentioned paper roll installation device for a printing press, anti-slip grooves are provided on the outer peripheral surface of the switch wheel body of the switch wheel; and the outer diameter of the open ring is smaller than the outer diameter of the switch wheel body.

[0017] The above-mentioned paper roll mounting device of the printing press, wherein each bearing assembly includes a deep groove ball bearing, a bearing spacer and a flange bearing with a retaining edge, which are installed in sequence from the inside to the outside in the bearing mounting hole, and a bearing pressure plate installed on the outer side surface of the frame side plate.

[0018] The paper roll installation device of the printing press of the present invention has the following features:

[0019] 1. There is no need to remove the bearing seats connecting the two ends of the paper roll core shaft. Only by using the cooperation of the specially structured rotating shaft and the switch wheel, the paper roll can be installed and removed without changing the working state of the printing press, while also meeting the power transmission of the paper roll.

[0020] 2. The simplified structure combines multiple functions in one, which not only meets the working requirements but also saves the time of changing paper rolls, improves the working efficiency, reduces the labor intensity of operators and improves their own safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional diagram of a paper roll mounting device for a printing press according to the present invention;

[0022] Figure 2 yes Figure 1 A-direction view;

[0023] Figure 3 yes Figure 2 BB view in the figure;

[0024] Figure 4 This is a structural schematic diagram of the inner end surface of the rotating shaft in the paper roll installation device of the printing press of the present invention;

[0025] Figure 5 This is a structural schematic diagram of the inner end surface of the switch wheel in the paper roll installation device of the printing press of the utility model;

[0026] Figure 6 This is a three-dimensional exploded view of the assembly relationship of the press-in ball plunger, rotating shaft, compression spring, steel ball and switch wheel in the paper roll installation device of the printing press of the utility model;

[0027] Figure 7 This is a three-dimensional diagram of a switch wheel installed on a rotating shaft in a paper roll installation device of a printing press according to the present invention;

[0028] Figure 8 This is a diagram showing the positional relationship between the rotating shaft and the switch wheel when the paper roll installation device of the printing press of the present invention locks the paper roll roller;

[0029] Figure 9 The utility model is a diagram showing the position relationship between the rotating shaft and the switch wheel when the paper roll installation device of the printing press takes out the paper roll. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] See also Figures 1 to 9 The paper roll mounting device of the printing press of the present invention includes a paper roll frame consisting of two frame side plates 11 and a frame bottom plate 12, two bearing assemblies installed in the bearing mounting holes of the two frame side plates 11 in a one-to-one correspondence, and a paper roll roller 8 bridged between the two bearing assemblies through a quick-change mechanism.

[0032] Each bearing assembly includes a deep groove ball bearing 21, a bearing spacer 22, a flange bearing 23 with a retaining edge, and a bearing pressure plate 24 installed on the outer side of the frame side plate 11, which are installed in sequence from the inside to the outside in the bearing mounting hole.

[0033] The quick-change mechanism includes two rotating shafts 3, two switch wheels 4, a rotating hand wheel 5, a paper roll drive motor 6 and two press-in ball plungers 7;

[0034] Each shaft 3 includes an inner shaft section 33, a middle shaft section 32 and an outer shaft section 31, which are connected in sequence from large to small in outer diameter; the middle shaft section 32 is coaxial with the outer shaft section 31; the inner shaft section 33 is eccentric with the middle shaft section 32; a centering blind hole 30 is provided on the inner end surface of the shaft 3, which is coaxial with the middle shaft section 32; an arcuate section 34 with a rib extends from the inner end surface of the shaft 3, which is coaxial with the inner shaft section 33, and the outer circumference of the arcuate section 34 with a rib is The arc surface has a radius that is the same as the radius of the inner section 33 of the rotating shaft. A U-shaped groove 340 with a depth greater than the radius of the arcuate section 34 with a rib is defined at the center of the chord plane of the arcuate section 34 with a rib. The central axis of the U-shaped groove 340 intersects with the extended line of the axis of the centering blind hole 30. A radial blind hole symmetrical to the center of the U-shaped groove 340 is defined on the outer circumference of the arcuate section 34 with a rib. A compression spring 35 and a steel ball 36 are sequentially inserted into the radial blind hole.

[0035] The inner diameter of each switch wheel 4 is adapted to the outer diameter of the inner section 33 of the rotating shaft. Each switch wheel 4 includes a switch wheel body 40 and an open ring 41 extending coaxially from the inner end surface of the switch wheel body 40. The outer circumference of the switch wheel body 40 is provided with anti-slip grooves. The outer diameter of the open ring 41 is smaller than the outer diameter of the switch wheel body 40. The opening width of the open ring 41 is greater than the width of the U-shaped groove 340 of the arcuate section with a retaining edge 34 on the rotating shaft 3. A first limiting groove 42a is axially defined on the inner circumference of the switch wheel 4 and is symmetrical with the opening center of the open ring 41. A second limiting groove 42b is also axially defined on the inner circumference of the switch wheel 4, with an angle greater than 90° and less than 150° with the first limiting groove 42a.

[0036] The switch wheel 4 is sleeved onto the rotating shaft 3 from the outer end thereof, so that the open ring 41 and the switch wheel body 40 are positioned one-to-one on the arcuate section 34 with ribs and the inner section 33 of the rotating shaft 3. Furthermore, the steel ball 36 in the radial blind hole on the rotating shaft 3 is embedded in the first limiting groove 42a on the inner circumference of the switch wheel 4 by the elastic force of the compression spring 35.

[0037] After the switch wheels 4 are installed on each of the two rotating shafts 3, they are inserted into the two bearing assemblies from the inner sides of the two frame side plates 11 in a one-to-one correspondence, so that the outer sections 31 of the rotating shafts protrude from the outer sides of the frame side plates 11, and the switch wheels 4 on the two rotating shafts 3 are located on the inner sides of the two frame side plates 11 in a one-to-one correspondence, and the openings of the open rings 41 and the notches of the U-shaped grooves 340 on the arched sections 34 with ribs are both facing upwards;

[0038] The rotating hand wheel 5 is fixed to the outer end surface of a rotating shaft 3 by a screw 50. The center of the outer end surface of the rotating shaft 3 is provided with a threaded blind hole engaged by the screw 50.

[0039] The paper roll drive motor 6 is mounted on the outer side of a frame side plate 11 through a motor base 60 and is connected to the outer section 31 of the other rotating shaft 3 through a coupling 61;

[0040] The plungers of the two pressed-in ball plungers 7 are installed in the centering blind holes 30 of the two rotating shafts 3 in a one-to-one correspondence;

[0041] A core head 8A coaxially extends from each end face of the paper roll 8. The core head 8A is the remaining portion of a cylinder with two identical inferior arcuate segments removed symmetrically from the center. The width of the core head 8A matches the width of the U-shaped groove 340 in the arcuate segment 34 with a rib on the rotating shaft 3. The diameter of the core head 8A matches the distance from the axis of the centering blind hole 30 in the rotating shaft 3 to the inner wall of the switch wheel 4. The center of the outer end face of each of the two core heads 8A defines an arcuate groove 80 that mates with the ball head of the press-in ball plunger 7.

[0042] First, the core shaft heads 8A at both ends of the paper roll 8 are inserted into the U-shaped grooves 340 on the two rotating shafts from top to bottom until the ball heads of the two press-in ball head plungers 7 are inserted into the embedding grooves 80 at both ends of the paper roll 8, thereby realizing the centering of the paper roll 8. Then, the two switch wheels 4 are rotated and the two rotating shafts 3 are rotated in opposite directions through the coupling 61 and the rotating handwheel 5, so that the open rings on the two switch wheels 4 close the notches of the U-shaped grooves 340 on the two rotating shafts 3 one by one, until the steel balls 36 in the radial blind holes on the rotating shafts 3 are embedded in the second limiting grooves 42b on the inner circumference of the switch wheel 4 by the elastic force of the compression spring 35, so as to fix the relative positions of the rotating shaft 3 and the switch wheel 4, so that the two ends of the paper roll 8 are firmly connected to the two rotating shafts 3 one by one.

[0043] When removing the paper roll 8, it is first necessary to use a force slightly greater than the normal rotation force to reversely rotate the rotating shaft 3 and the switch wheel 4 to overcome the elastic force of the compression spring 35 in the rotating shaft 3, allowing the steel ball 36 in the rotating shaft 3 to slide out of the second limiting groove 42b of the switch wheel 4. Then, continue to reversely rotate the rotating shaft 3 and the corresponding switch wheel 4 until the openings of the open rings 41 on the two switch wheels 4 face upward and the notches of the U-shaped grooves 340 on the two rotating shafts 3 also face upward, so that the steel balls 36 in the two rotating shafts 3 are respectively embedded in the first limiting grooves 42a of the two switch wheels 4 to prevent excessive rotation. Then, lift the paper roll 8 upward to disengage the core shaft heads 8A at both ends of the paper roll roller 8 from the U-shaped grooves 340 on the two rotating shafts, and the paper roll is removed.

[0044] The paper roll mounting device of the printing press of the present invention adjusts the switch wheel 4 and the rotating hand wheel 5 so that the U-shaped groove 340 on the rotating shaft 3 and the opening of the open ring 41 of the switch wheel 4 are in the same direction, thereby facilitating the removal of the entire paper roll for replacement without disassembling the bearing assemblies and other connecting mechanisms at both ends of the paper roll, thereby saving time for paper roll replacement and improving work efficiency.

[0045] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A paper roll mounting device for a printing press, comprising a paper roll frame formed by two frame side panels and a frame bottom panel, two bearing assemblies correspondingly mounted in bearing mounting holes of the two frame side panels, and a paper roll roller connected between the two bearing assemblies via a quick-change mechanism; characterized in that: The quick-change mechanism includes two rotating shafts, two switch wheels, a rotating hand wheel, a paper roll drive motor and two press-in ball plungers; Each of the rotating shafts comprises an inner shaft section, a middle shaft section and an outer shaft section which are connected in sequence from large to small in outer diameter; the middle shaft section is coaxial with the outer shaft section; the inner shaft section is eccentric with the middle shaft section; a centering blind hole which is coaxial with the middle shaft section is provided on the inner end surface of the rotating shaft; a bow-shaped section with a rib extends coaxially from the inner end surface of the inner shaft section, the outer peripheral surface of the bow-shaped section with a rib is a superior arc surface and the radius is the same as the radius of the inner shaft section, a U-shaped groove with a depth greater than the radius of the bow-shaped section with a rib is provided at the center of the chord plane, the central axis of the U-shaped groove intersects with the axis of the centering blind hole, a radial blind hole which is symmetrical with the center of the U-shaped groove is provided on the outer peripheral surface of the bow-shaped section with a rib, and a compression spring and a steel ball are inserted into the radial blind hole in sequence; The inner diameter of the switch wheel is adapted to the outer diameter of the inner section of the rotating shaft. The switch wheel includes a switch wheel body and an open ring extending coaxially from the inner end surface of the switch wheel body. The opening width of the open ring is greater than the width of the U-shaped groove of the arcuate section with a retaining edge on the rotating shaft. A first limiting groove is axially defined on the inner circumference of the switch wheel and is symmetrical with the opening center of the open ring. A second limiting groove is also axially defined on the inner circumference of the switch wheel, with an angle greater than 90° and less than 150° with the first limiting groove. The switch wheel is sleeved on the rotating shaft from the outer end thereof, so that the open ring and the switch wheel body are located on the arcuate section with the rib and the inner section of the rotating shaft in a one-to-one correspondence, and the steel ball in the radial blind hole on the rotating shaft is embedded in the first limiting groove on the inner circumferential surface of the switch wheel by the elastic force of the compression spring; After the switch wheels are installed on each of the two rotating shafts, they are inserted into the two bearing assemblies one by one from the inner sides of the two frame side plates, so that the outer sections of the rotating shafts protrude from the outer sides of the frame side plates, and the switch wheels on the two rotating shafts are located on the inner sides of the two frame side plates, and the openings of the split rings and the notches of the U-shaped grooves on the arched sections with ribs are both facing upwards; The rotating hand wheel is fixed to the outer end surface of a rotating shaft by screws; The paper roll drive motor is mounted on the outer side of a frame side plate through a motor seat and is connected to the outer section of the rotating shaft of another rotating shaft through a coupling; The plungers of the two pressed-in ball plungers are installed in the aligned blind holes of the two rotating shafts in a one-to-one correspondence; A core shaft head extends coaxially from each end face of the paper roll; the core shaft head is the remaining portion of a cylinder after two identical inferior fox bow segments are removed symmetrically from the center, and the width of the core shaft head is adapted to the width of the U-shaped groove on the arched segment with a retaining edge of the rotating shaft, and the diameter of the core shaft head is adapted to the distance from the axis of the centering blind hole on the rotating shaft to the inner wall of the switch wheel; the center of the outer end face of each of the two core shaft heads is provided with an arc-shaped groove adapted to the ball head of the press-in ball plunger; First, insert the core shaft heads at both ends of the paper roll into the U-shaped grooves on the two rotating shafts from top to bottom until the ball heads of the two press-in ball plungers are embedded in the embedding grooves at both ends of the paper roll. Then rotate the two switch wheels and rotate the two rotating shafts in opposite directions so that the open rings on the two switch wheels close the notches of the U-shaped grooves on the two rotating shafts one by one until the steel balls in the radial blind holes on the rotating shafts are embedded in the second limiting grooves on the inner circumference of the switch wheels through the elastic force of the compression spring, so that the two ends of the paper roll are firmly connected to the two rotating shafts one by one.

2. The paper roll installation device of a printing press according to claim 1, characterized in that: A threaded blind hole engaged with the screw is provided at the center of the outer end surface of a rotating shaft connected to the rotating hand wheel.

3. The paper roll installation device of a printing press according to claim 1, characterized in that: The outer peripheral surface of the switch wheel body of the switch wheel is provided with anti-slip grooves; the outer diameter of the open ring is smaller than the outer diameter of the switch wheel body.

4. The paper roll installation device of a printing press according to claim 1, characterized in that: Each bearing assembly includes a deep groove ball bearing, a bearing spacer, a flange bearing with a retaining edge, and a bearing pressure plate installed on the outer side of the frame side plate.

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