JPH10305340A - Cover transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a maintenance-free aseptic filling which enables to eliminate the need for supplying the lubricant, to prevent the contamination and to improve the sanitary by making the gear mechanism of the rotary drum driving power transfer unit, which delivers a laminated can cover, as a combination of either, a pair of synthetic resin gears, or a synthetic resin gear and a metallic gear. SOLUTION: A gear mechanism, in which a drum shaft 19 is to be rotated by a gear 27, a can cover is cut by a knife 21 and transferred in succession by a spiral groove 31 of a transfer drum, comprises a metallic driving gear, a resin internal gear 4, a resin intermediate gear, and a metallic drum shaft gear 27 to prevent the occurrence of the baking even without having the lubricant by eliminating the contacts of metallic gears each other. A rolling bearing 26 is made as a filler prelubricated rolling bearing, and lower shaft seals of the driving shaft and the transfer drum shaft 10 are to be labyrinth seals. Furthermore, since a large diameter internal gear 4 is formed by resin, the outer surrounding part is to be engaged and supported in a grease prelubricated gearing 5 and make the rotation load reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid feeder in a seamer for winding a lid around a can body, and more particularly to a lid feeder which does not require maintenance such as lubrication.

[0002]

2. Description of the Related Art In a lid feeder of a seamer, lids which are vertically stacked are cut out one by one from the lower end of the stack by the rotation of three sets of feed drums arranged at 120 ° intervals and dropped. The conventional lid feeding device is configured as shown in FIGS.
Is a gear mechanism composed of a combination of a drive gear 50-an internal gear 51-an intermediate gear 52-a drum shaft gear 53 fixed to a drive shaft 57, and all gears are made of metal. Therefore, lubrication is indispensable in order to maintain good meshing. Conventionally, lubrication in a lid feeding device has mainly been grease lubrication for applying grease.

[0003] However, there is a drawback that grease softens with the elapse of operation time, and leaks out during operation and scatters outside. In particular, in the conventional lid feeding device, as shown in FIGS. 7 and 8, the large-diameter internal gear 51 is directly supported by the intermediate cylindrical body 55 and the outer peripheral portion thereof is exposed to the outside. Further, since a normal bearing having no hermeticity is adopted as the bearing, it is not possible to prevent grease from scattering to the outside. For this reason, the conventional lid feeding device has a disadvantage that the surroundings are contaminated by the scattering of grease, and there are problems in that maintenance and maintenance such as cleaning and grease replenishment are troublesome, and there is a problem of sanitary properties. In addition, there is a problem that water enters the bearing portion and the gear mechanism portion at the time of washing, and regular maintenance is indispensable.

On the other hand, the use of an oil circulation lubrication system is conceivable. However, the oil circulation lubrication has disadvantages in that it is difficult to seal and supply / collect oil, and the device becomes large-scale. Further, the lid feed-out device is often arranged in a narrow place and has only one drive shaft protruding, so that there is a problem that it is difficult to secure a path for oil supply and return. In addition, when the mold is changed, the lid delivery device itself may be replaced. In this case, there is a problem that the oil path must be connected each time, and it is practically difficult to introduce oil circulation lubrication.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks of the conventional lid feeding device, and it is not necessary to supply the lubricating oil in the lid feeding device, and the lubricating oil is scattered. Without the risk of contaminating the surroundings,
Excellent sanitary properties, no maintenance such as cleaning is required,
An object of the present invention is to provide a lid feeding device that can be suitably applied to an aseptic filling line.

[0006]

In order to achieve the above object, the present invention provides a lid feeding apparatus for cutting a lid one by one from a bottom of a stacked can by a plurality of feeding drums having knives. In the delivery device, the power transmission mechanism that rotationally drives the delivery drum includes a gear mechanism that is combined so as to mesh with synthetic resin gears or mesh with a synthetic resin gear and a metal gear. It has a configuration characterized by the following. Further, in order to prevent foreign matter such as water from entering from the outside and scattering of lubricating oil, the bearing mounting portions of the delivery drum shaft and the drive shaft are sealed.

As the power transmission mechanism, a metal drive gear provided on a drive shaft, a synthetic resin internal gear engaged with the drive gear, a plurality of synthetic resin intermediate gears engaged with the internal gear, A combination of a metal drum shaft gear fixed to a delivery drum shaft that meshes with the intermediate gear can be suitably employed. And, by providing the gear mechanism in a sealed space formed between the upper cylindrical body and the intermediate cylindrical body having a penetrating inner cylinder at the center, more sealing is achieved,
It is desirable in terms of maintenance-free and sanitary. In addition, since the bearings of the drive shaft and the delivery drum shaft adopt a lubricant-enclosed type bearing, no maintenance is required. .

[0008] As another configuration of the lid feeding device of the present invention, even if the power transmission mechanism for driving the feeding drum to rotate is constituted by a combination of a timing belt and a pulley, the above object is achieved. Can be achieved.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a lid feeding device according to an embodiment of the present invention. 1 to 3
1 shows an embodiment of a lid feeding device of the present invention. The lid feeding device according to the present embodiment includes an upper cylinder 7, an intermediate cylinder 12, and a lower cylinder 1 each having a penetrating inner cylinder wall at the center.
A stacker chute (not shown) for supplying a lid in a stacked state is arranged on the upper surface of the upper cylindrical body 7, and the lid is cut out one by one from the lower part of the lid laminated body to the lower cylindrical body 13. Three sets of lid feeding drums 20 for feeding are arranged. The intermediate cylindrical body has a cylindrical concave portion inside with the upper surface remaining outside the outer annular wall portion 29, and the outer peripheral edge of the upper cylindrical body is supported by the outer annular wall portion 29 of the intermediate cylindrical body. An annular space 17 is formed between the annular space 17 and the wall 30. The annular space 17 houses a gear mechanism for driving the three sets of delivery drums. Hereinafter, the drive mechanism of the delivery drum will be mainly described with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a drive shaft which is driven synchronously with a seamer (not shown), penetrates a lower cylinder, an intermediate cylinder, and an upper cylinder, and has a lubricant-enclosed bearing 14 provided on the intermediate cylinder 12.
And a lubricant-enclosed bearing 3 provided in the upper cylinder 7, and a metal drive gear 2 is mounted on the drive shaft 1 in the space 17.
The key is fixed so that it is located at. Reference numeral 4 denotes a large-diameter internal gear that meshes with the drive gear 2, and is formed of, for example, a synthetic resin such as nylon. The outer peripheral portion of the internal gear 4 is rotatably supported by a grease-enclosed bearing 5 between the internal gear 4 and the inner peripheral surface of the outer annular wall portion 29 of the intermediate cylinder. Reference numeral 9 denotes an intermediate gear made of a synthetic resin meshing with the internal gear 4.
Three sets are provided at 0 ° intervals, and each intermediate gear 9 is
Lubricating filler is enclosed in the shaft 11 fixed to the shaft (polylube)
Each is rotatably supported via a bearing 10.
As the lubricant to be enclosed, grease or a lubricant containing grease and ultrahigh molecular weight polyethylene as main components can be suitably used.

Reference numeral 27 denotes a metal drum shaft gear fixed to the delivery drum shaft 19, and is driven to rotate in mesh with the intermediate gear 11. The delivery drum shaft 22 is
3 are arranged at 0 ° intervals, and as shown in FIG. 3, are carried by lubricated filler-filled bearings 26 and 28, and provided with a non-contact seal (labyrinth seal) 25 below the lubricated filler-filled bearing 28. The shaft is sealed so that frictional resistance applied to the shaft for sealing is eliminated, and water is prevented from entering the bearing mounting portion during cleaning. At the lower end of the delivery drum 20, a delivery drum in which a spiral groove 31 formed integrally with the knife 21 to separate and feed a lid cut out by the knife downward is fixed.

In the drawing, reference numeral 6 denotes a shaft sealing cap covering the top of the drive shaft 1, and reference numeral 24 denotes a shaft sealing cap covering the top of the delivery drum shaft 19. Also, 16, 18,
Reference numerals 33 denote O-rings, respectively, which seal the bearing mounting portion together with the non-contact seals 15 and 25, and serve to prevent water or the like from entering from outside during cleaning. Reference numeral 23 denotes connecting bolts for connecting the upper cylindrical body 7 and the intermediate cylindrical body 12, and three bolts are arranged at 120 ° intervals in the illustrated embodiment.

The cover feeder of this embodiment is constructed as described above, and the main drive shaft 1 is driven to rotate, so that the metal drive gear 2 is made of synthetic resin, the internal gear 4 is made of synthetic resin. The feeding drum shaft 19 is rotationally driven via the intermediate gear 9-metal gear 27, and three cutting knives 21 arranged at equal intervals rotate to cut the stacked lids one by one from the lower end. The paper is sequentially fed while supporting the curled portion of the lid by the spiral groove 31 of the feeding drum.

The material of the gear mechanism for driving the lid delivery drum 20 in the lid delivery device of this embodiment is metal → synthetic resin → synthetic resin → metal.
In this way, by eliminating the contact between the metal gears, the possibility of burning or insufficient lubrication without lubrication is eliminated. Although all gears are desirably made of synthetic resin in that lubrication is not required, the drive gear 2 and the drum shaft gear 27 are small in diameter and keyed so as to be keyed to the shaft, so that they can withstand a large load. Made of metal to be able to. Further, in the present embodiment, since the bearing employs a lubricating filler-enclosed bearing, it does not require injection of a lubricant and rotates without fear of oil leakage. Therefore, no maintenance is required.

The large-diameter internal gear is fitted with a grease-enclosed bearing 5 and its upper end is formed with a flange so as to reduce the rotational load as much as possible. The bearing was bent in the shape of a circle and supported by the inner ring of the bearing 5 so that the frictional resistance was reduced so that the bearing could rotate smoothly. Further, the lower shaft seals of the drive shaft 1 and the delivery drum shaft 19 employ a non-contact seal (labyrinth seal) to reduce the rotational friction with the seal, and eliminate the wear of the seal portion, and provide a semi-permanent seal. In addition, water and steam during cleaning are prevented from entering the bearing mounting part, and maintenance is not required.

As described above, in this embodiment, a combination of a synthetic resin gear and a synthetic resin gear, a combination of a metal gear and a synthetic resin gear, and a combination of a grease-enclosed bearing and a boiler-lube enclosed bearing are used. Moreover, even if no lubricant is supplied, there is no danger of burning due to poor lubrication, and maintenance is not required. In addition, since it is sealed, there is no danger of water droplets from entering the bearing mounting part from outside, and there is no danger of lubricant scattering from the lid cutting device during work, so it is very sanitary, especially aseptic filling. It is suitable for adoption in a line.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes are possible. Instead of the synthetic resin gear, a ceramic gear may be employed. In this case, they can be combined so as to mesh with each other, or between ceramic and metal, or between ceramic and metal.

FIGS. 4 to 6 show another embodiment of the lid feeding device of the present invention. In the present embodiment, a timing belt is employed as a rotation driving mechanism of the delivery drum instead of the gear mechanism. The same components as those in the above embodiment are denoted by the same reference numerals, and only differences from the above embodiment will be described.

In this embodiment, a metal driving pulley 41 meshing with the timing belt 42 is keyed to the driving shaft 1, and a metal drum shaft pulley 43 meshing with the timing belt is also provided on each of the three delivery drum shafts 19. An endless timing belt 42 is stretched between these pulleys, and the rotational force of the driving pulley 41 is directly transmitted to the drum shaft pulley via the timing belt to rotate the lid feed drum. It is configured. In addition, 4
Reference numeral 4 denotes a guide pulley made of resin, and a timing belt 42.
Is rotatably supported on a shaft 45 via a lubricating filler-enclosed bearing 46.

As described above, in this embodiment, since the timing belt mechanism is used, there is no need for lubrication between the timing belt and the pulley, and the bearing employs a lubricated filler-filled bearing. There is no need to supply lubricant, so no maintenance is required. Other functions and effects are the same as those of the above embodiment. Another advantage is that the driving mechanism can be simplified.

[0021]

According to the lid feeding device of the present invention, there is no danger of burning due to poor lubrication even without supplying the lubricant, no danger of oil leakage to the outside, supply of the lubricant, etc. No maintenance required. Also, since it is sealed, there is no danger of water droplets entering the bearing mounting part from the outside, and there is no danger of lubricant scattering from the lid cutting device during work, so it is very sanitary, especially aseptic filling line. It is suitable for adoption.

As the power transmission mechanism, a metal drive gear
By adopting a synthetic resin internal gear-synthetic resin intermediate gear-metal drum shaft gear, the gear that does not burn or lack lubrication without lubrication and that has a large load Since it is made of metal, it can withstand a large load and does not impair durability. In addition, by providing the gear mechanism in a closed space formed between the upper cylinder having a through inner cylinder at the center and the intermediate cylinder, foreign substances can be prevented from entering from the outside and low friction can be achieved. Can be By employing a lubricant-enclosed type bearing, no maintenance is required and sanitary is further improved. Furthermore, by employing a combination of a timing belt and a pulley as a power transmission mechanism for rotationally driving the delivery drum, the drive mechanism is simple, lubrication is unnecessary, maintenance work is not required, and oil is not scattered and sanitary. It is.

[Brief description of the drawings]

FIG. 1 is a plan view of a lid feeding device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a plan view of a lid feeding device according to another embodiment of the present invention.

FIG. 5 is a sectional view taken along line CC of FIG. 4;

FIG. 6 is a sectional view taken along line DD of FIG. 4;

FIG. 7 is a plan view of a conventional lid feeding device.

8A is a sectional view taken along the line EE of FIG. 7, and FIG. 8B is a sectional view taken along the line FF of FIG.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Drive shaft 2 Drive gear 3, 14 Lubricant-enclosed bearing 4 Internal gear 7 Upper cylinder 9 Intermediate gear 10, 26, 28, 46 Lubricant filler-enclosed bearing 12 Intermediate cylinder 13 Lower cylinder 15, 25 Non-contact Seal 17 Space portion 19 Drum shaft 20 Feeding drum 21 Knife 29 Outer annular wall portion 41 Drive pulley 42 Timing belt 43 Drum shaft pulley

Claims (7)

[Claims] 1. A lid feeding device for cutting a lid one by one from a bottom portion of a stacked can with a plurality of feeding drums having a knife, wherein a power transmission mechanism for rotating and driving the feeding drum is made of synthetic resin. Wherein the gears are combined so as to mesh with each other or between a synthetic resin gear and a metal gear. 2. The lid feeding device according to claim 1, wherein a bearing mounting portion of the feeding drum shaft and the drive shaft is sealed. 3. A metal drive gear provided on a drive shaft, a synthetic resin internal gear engaged with the drive gear, and a plurality of synthetic resin intermediate gears engaged with the internal gear. 3. The feeding device for a lid according to claim 1, further comprising a metal drum shaft gear fixed to a feeding drum shaft that meshes with the intermediate gear. 4. The lid according to claim 1, wherein the gear mechanism is provided in a closed space formed between an upper cylinder having a through inner cylinder at the center and an intermediate cylinder. Feeding device. 5. The lid delivery device according to claim 3, wherein the drive shaft and the delivery drum shaft are supported by a lubricant-filled bearing. 6. A lid feeder for cutting a lid one by one by a plurality of feed drums having knives from a bottom portion of a stacked can lid, wherein a power transmission mechanism for rotatingly driving the feed drum includes a timing belt. A lid feeding device comprising a combination of pulleys. 7. The apparatus according to claim 6, wherein a bearing mounting portion of the delivery drum shaft and the drive shaft is sealed.