JPH0733426U - Structure for discharging used grease from winding roll bearing - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a structure for easily and reliably metabolizing grease in a bearing of a winding roll. [Structure] A winding roll 24 is rotatably attached to a lower end portion of a roll shaft 25 suspended from a seaming lever 22 via a bearing 26, and the winding roll 24 is also attached.
Each of the lower end and the upper end of the roller is substantially sealed by covers 29 and 32. Further, the roll shaft 25 is opened at the lower end to communicate with the rolling portion of the bearing 26, and the upper end is the seaming lever. Nipple 3 provided on the outer wall surface of 22
8 is a structure in which an oil supply passage 36 communicating with 8 is formed, and an oil discharge passage 43 is further formed on the roll shaft 25, and
On the upper end side of the bearing 26, the oil drain groove 4 communicating with the oil drain passage 43 is provided.
0 is further formed, and a nipple 45 communicating with the oil discharge passage 43 is provided on the outer wall surface of the seaming lever 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a winding roll in a can lid winding machine, and more particularly to a structure for performing grease metabolism on the bearing of the winding roll.

[0002]

[Prior art]

 The winding machine used in the manufacturing process of canned foods presses the flange portion (curled helicopter) of the can lid covered on the can body against the winding groove of the winding roll while rotating them. Seaming is applied to the flange to tighten the can body and can lid. Therefore, since the winding roll can be repeatedly rotated at high speed, it is necessary to sufficiently lubricate the bearing, and in the past, grease was regularly injected to perform the lubrication.

That is, FIG. 3 is a cross-sectional view of a winding roll disclosed in Japanese Utility Model Publication No. 2-48100, in which reference numeral 1 is a roll shaft, which is mounted by hanging it on a seaming lever (not shown). There is. An oil supply passage 2 that opens at the lower end of the roll shaft 1 is formed parallel to the axis. The upper end of the oil supply passage 2 opens at the outer surface of the roll shaft 1 and the outer wall surface of the seaming lever. It communicates with the oil supply port (not shown) formed on the. A winding roll 4 is rotatably attached to the lower end of the roll shaft 1 via a pair of bearings 3. The bearing 3 has a lock plate attached to the lower end of the roll shaft 1 with a screw 5. It is fixed to the roll shaft 1 by 6. A through hole 7 is formed in the screw 5 along the central axis thereof, so that the oil supply passage 2 opens at the end of the roll shaft 1. The lower end of the winding roll 4 is closed by a bottom cover 8 and the upper end is closed by a shim 9 and an upper cover 10. A reference numeral 11 in FIG. 3 is a seal ring, which is provided so as to prevent grease from leaking on the upper end side of the winding roll 4.

Therefore, in the configuration shown in FIG. 3, if grease is pressed in from an oil supply port (not shown), the grease passes through the oil supply passage 2 formed in the roll shaft 1 to reach the lower end portion thereof, and from here, the upper surface of the bottom cover 8 is reached. The side flows toward the bearing 3, so that the grease is supplied to the bearing 3.

Further, Japanese Utility Model Publication No. 48100/1990 discloses a configuration in which a so-called labyrinth seal is used instead of the seal ring 11.

[0006]

[Problems to be solved by the device]

 Since the products processed by the above-mentioned winding rolls are generally cans filled with food and drink, the grease for lubricating the bearing may leak to the outer peripheral side of the winding rolls due to centrifugal force, or the grease may leak. Although it is necessary to prevent the oil from sticking to the can, the above-mentioned conventional structure can meet the requirement because grease leakage hardly occurs during the winding process. On the other hand, the grease once supplied to the bearing remains inside the bearing for a long period of time, and even if it is newly supplied, it is equivalent to the amount of leakage from the worn parts of the seal when the grease is pressed in. It is a small amount, and virtually no metabolism (replacement) of grease occurs. Therefore, in the above-mentioned conventional structure, there is a possibility that the oil film is broken due to deterioration of the grease, the frictional force is increased due to the oil film, or the rotation of the winding roll is poor.

If all the grease inside the bearing is replaced in order to eliminate the above-mentioned inconvenience, in the conventional structure, it is necessary to remove the tightening roll, which is troublesome and the tightening work is difficult. Since the number of rolls is large and it takes a long time, the operating rate of the winding machine is lowered, which is a problem. Therefore, in the past, the oil seal such as the seal ring described above was removed, and the leakage of grease was positively made to some extent during operation, and the leaked grease was wiped by hand using a waste cloth to promote the metabolism of grease. Although this is also done, such work is not only dangerous, but there is a possibility that grease will adhere to the product can.

The present invention has been made in view of the above circumstances, and it is possible to easily metabolize or replace grease in the bearing of a winding roll while maintaining a high sealing property of the winding roll. An object of the present invention is to provide a structure for discharging used grease from the bearing portion of a winding roll that can be used.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is configured such that a winding roll is rotatably attached to a lower end portion of a roll shaft suspended from a seaming lever via a bearing, and the winding roll is also attached. Each of the roll shaft has a high seal structure at its lower end and upper end, and the roll shaft has an opening at its lower end to communicate with the rolling portion of the bearing and the upper end of the seaming lever is In the structure for discharging the used grease of the winding roll bearing part in which the oil supply passage communicating with the oil supply port provided on the outer wall surface is formed, an oil discharge passage is further formed on the roll shaft, and the upper end side of the bearing is also formed. Has an oil drain groove communicating with the oil drain passage, and an oil drain port communicating with the oil drain passage is provided on the outer wall surface of the seaming lever. .

[0010]

[Action]

 Grease is supplied to a bearing that rotatably supports the winding roll with respect to the roll shaft from an oil supply passage formed inside the roll shaft. That is, when grease is press-fitted from the oil supply port formed on the outer wall surface of the seaming lever, the grease flows through the oil supply passage from the opening at the lower end thereof to the bearing and is supplied to the rolling portion of the bearing. On the other hand, this rolling portion communicates with the oil discharge port formed on the outer wall surface of the seaming lever through the oil discharge groove formed on the upper end of the bearing and the oil discharge passage formed on the roll shaft. Therefore, if grease is supplied through the oil supply port and oil supply passage, the used grease inside the bearing will be pushed by the new supply grease and will pass through the oil discharge groove and oil discharge passage from the oil discharge port. Is discharged. That is, it is possible to discharge the used grease to a certain place without causing the grease to leak to the outer peripheral portion of the winding roll, and it is possible to sufficiently metabolize the grease.

[0011]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are cross-sectional views showing an embodiment of this idea, in which a seaming lever 22 is attached to the lower end of a lever shaft 21 hanging from a seaming assembly 20. The seaming lever 22 is arranged on the outer peripheral side of the seaming chuck 23, and is configured to move circularly inside the housing (not shown) of the winding machine. Further, the seaming lever 22 is provided with first and second winding rolls 24 lined up in the circumferential direction thereof so as to hang down. Further, a cam mechanism (not shown) is provided on the upper end portion of the lever shaft 21, and by swinging the seaming lever 22 by this cam mechanism, the first and second winding rolls 24 are sequentially moved to the seaming chuck 23. It is designed to approach and separate from the side.

Each winding roll 24 is rotatably attached to the lower end of a roll shaft 25 hanging from the seaming lever 22. That is, as shown in FIG. 1, a roll shaft 25, the upper end of which is fitted to the seaming lever 22, is suspended from the seaming lever 21, and a pair of bearings (taper rollers) are provided on the outer periphery of the lower end of the roll shaft 25. A bare ring) 26 is fitted and a winding roll 24 is fitted around the outer circumference of the bearing 26. In these bearings 26, a disk-shaped support 27 is fixed to the lower end of the roll shaft 25 with a mounting screw 28, and the inner race 26a of the lower-end bearing 26 is pressed upward by the support 27. , Is fixed to the roll shaft 25.

A bottom cover 29 is fitted to the lower end of the winding roll 24, and liquid tightness is secured between the bottom cover 29 and the winding roll 24 by a seal ring 30. Therefore, the lower end of the winding roll 24 is sealed by the bottom cover 29 and the seal ring 30. A shim 31 fitted to the roll shaft 25 and an upper cover 32 are sequentially arranged at the upper end of the bearing 26, and a seal member 33 is provided between the outer race 26 b of the upper bearing 26 and the shim 31. And a seal 34 interposed between the upper cover 32 and the winding roll 24. Therefore, the upper end of the winding roll 24 is also sealed in the same manner as the lower end. It should be noted that the hermetically sealed portion may have a seal structure that does not scatter to the outside even if grease reaches the seal portion due to centrifugal force during rotation of the winding roll 24, and does not have to be a complete close seal. good.

The roll shaft 25 is formed with an axial hole of a predetermined length from the lower end thereof along the central axis, and the end of the axial hole is formed by cutting out a part of the outer surface of the roll shaft 25. The formed notch groove 35 communicates with a lateral hole formed in the radial direction, and the lateral hole and the axial hole form an oil supply passage 36. Further, the seaming lever 22 has a supply hole 37 extending substantially horizontally from the outer wall surface thereof to the cutout groove 35. Grease is applied to the opening of the supply hole 37 on the outer wall surface of the seaming lever 22. A nipple 38 for press fitting is attached. Further, the mounting screw 28 is screwed into the opening end side of the axial hole, and the mounting screw 28 has a through hole 39 formed along the central axis thereof. Therefore, the oil supply passage 36 opens at the lower end of the roll shaft 25 through this through hole.

On the other hand, a plurality of oil drain grooves 40 are radially formed at the upper end of the inner race 26a of the upper bearing 26 of the bearings 26 arranged vertically. An annular groove 41 is formed on the outer peripheral surface of the roll shaft 25 at a position corresponding to the oil drain groove 40, and the axial hole communicating with the annular groove 41 is located at an upper end at a position eccentric to the axis. It is formed from the part toward the axial direction. The upper end of the axial hole is sealed by a plug 42, and a lateral hole communicating with the middle portion of the axial hole is formed in the radial direction. The axial hole and the lateral hole are drained. A path 43 is formed. Although not particularly shown, a groove similar to the above-described cutout groove 35 is formed in a portion of the roll shaft 25 corresponding to the open end of the lateral hole. A discharge hole 44 communicating with the groove is formed in the seaming lever 22 by piercing the outer wall surface thereof. A nipple 45 for discharging grease when a pressure higher than a predetermined pressure is applied is attached to the opening end of the discharge hole 44. That is, the rolling portion between the inner and outer races 26a and 26b of the bearing 26 communicates with the nipple 45 through the oil drain groove 40, the oil drain passage 43, and the drain hole 44.

Next, the operation of the winding roll 24 configured as described above will be described. The can lid 47 placed on the can body 46 on the lifter plate (not shown) is pressed by the seaming chuck 23, and in that state. It is rotated by the seaming chuck 23 and moved around. In this case, the seaming chuck 23 rotates synchronously with the lifter plate. By swinging the seaming lever 22 with respect to the can lid 47, the first and second winding rolls 24 are sequentially pressed against the helicopter of the can lid 47, and as a result, the can lid 47 and the can body 46. The flange portion of is wound by a winding groove 48 formed on the outer peripheral portion of the winding roller 24.

The winding roll 24 is rotated by coming into contact with the can lid 47 which is being rotated by the seaming chuck 23. Lubrication of the bearing 26 holding the winding roll 24 rotatably does not occur. The grease supplied from the oil supply passage 36 is used. That is, when a grease gun (not shown) is pressed against the upper nipple 38 in FIG. 1 to inject the grease, the grease flows inside the oil supply passage 36 as indicated by the arrow in FIG. From above, it is fed into the rolling portion of the bearing 26 through the upper surface of the bottom cover 29. The grease thus supplied does not leak to the outer peripheral surface of the winding roll 24 because the upper and lower sides of the winding roll 24 are sealed.

When the grease was supplied again through the oil supply passage 36 after the seaming process was continuously performed for a predetermined time, the used grease already supplied to the bearing 26 was newly supplied. The grease is pushed by the grease and flows from the oil drain groove 40 at the upper end of the bearing 26 to the oil drain passage 43 through the annular groove 41. Then, the used grease is discharged to the outside from the oil discharge hole 44 formed in the shimming lever 22 through the nipple 45. That is, if grease is additionally supplied from the nipple 38 on the oil supply passage 36 side, the used grease can be discharged to the outside through the oil discharge passage 43 to metabolize the grease. As a result, with the above-described structure, it is possible to maintain the smooth rotation of the winding roll 24 with a simple operation and without fear that grease may adhere to the can. In particular, in the above-described embodiment, since the nipples 38 and 45 are provided on the outer wall surface of the seaming lever 22, it is only necessary to discharge the discharged grease to the tray such as a gutter, and the wiping work becomes unnecessary. Operability is improved.

In the above embodiment, the oil discharge groove 40 is formed in the upper end portion of the inner race 26a of the upper bearing 26 of the bearings 26 arranged vertically to form the grease discharge path. However, the present invention is not limited to the above-mentioned embodiment, and a through hole may be formed in addition to the groove, or a groove may be formed in the shim. In the above embodiment, the discharge port is provided with a nipple that opens at a certain pressure or more. However, if the discharge port is small, the nipple may not be provided and may be opened at all times. It is also possible to use a plug that opens only when supplying grease and closes after supplying grease. Further, in the above embodiment, the annular groove is formed on the roll shaft so that the oil drain groove and the oil drain passage are communicated with each other. However, if the oil drain groove and the oil drain passage can be directly communicated with each other, the annular groove Need not be provided. An annular groove may be provided on the bearing side. Furthermore, it may be a discontinuous annular groove. Further, it is not necessary to provide a plurality of the discharge grooves radially as shown in the above embodiment, and the present invention may have a structure in which one discharge groove is formed.

Further, in the above-described embodiment, the first and second winding rolls are applied to the type of winding machine in which the common seaming lever is attached, but the first and second winding rolls are independently provided. It can be applied to the type of winding machine attached to the seaming lever.

[0021]

[Effect of device]

 As described above, according to the present invention, the oil drain passage is formed on the roll shaft, the oil drain groove communicating with the oil drain passage is formed on the upper end side of the bearing, and the outer wall surface of the seaming lever is formed on the outer wall surface. Since an oil discharge port that communicates with the oil discharge passage is provided, by supplying additional grease from the oil supply passage, the used grease is discharged through the oil discharge passage. This can be done on the outer wall surface, and therefore the grease metabolism in the bearing can be performed with a simple operation. Therefore, according to the present invention, it is possible to prevent inconveniences such as the rotation failure of the winding roll due to the deterioration of the grease and the buildup of the winding groove due to it.

Further, since the used grease is discharged according to the supply amount by additionally supplying the grease, the grease is not excessively supplied to the bearings. Therefore, after the grease is supplied, the tightening roll is closed. There is no need to manually rotate to check the rotating state, and because the seals do not deform due to grease pressure and leak to the outside, additional work such as grease wiping work can be reduced, and the can It is possible to prevent grease from adhering to the container to be wound up. Furthermore, since the grease discharge part is opened on the upper end side of the bearing, it is possible to prevent grease leakage from the seal part on the upper end side of the bearing. Then, if the used grease is positively discharged from the drain passage, the metabolism of the grease can be confirmed.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view showing a structure of a bearing portion of a conventional winding roll.

[Explanation of symbols]

 22 Seaming Lever 25 Roll Shaft 26 Bearing 19, 32 Cover 29, 32 36 Oil Supply Path 43 Oil Discharge Path 40 Oil Discharge Groove

Claims (1)

[Scope of utility model registration request] 1. A winding roll is rotatably attached to a lower end portion of a roll shaft suspended from a seaming lever via a bearing, and high seals are provided at the lower end portion and the upper end portion of the winding roll, respectively. The roll shaft further has a structure in which an oil supply passage is formed which opens at the lower end of the roll shaft and communicates with the rolling portion of the bearing, and the upper end communicates with the oil supply port provided on the outer wall surface of the seaming lever. In the used grease discharging structure of the wound roll bearing part, an oil drain passage is further formed on the roll shaft, and an oil drain groove communicating with the oil drain passage is formed on the upper end side of the bearing. A structure for discharging used grease in a winding roll bearing portion, which is formed and further has an oil discharge port provided on an outer wall surface of the seaming lever and communicating with the oil discharge passage.