JPH0723070Y2 - Lifter pressure adjusting device for can lid wrapping machine - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a lifter pressure adjusting device in a machine in which a can body is covered with a lid and tightened.

[Prior art]

For example, there is known a can lid wrapping machine (seamer) for covering a can body filled with foods, beverages, etc., and covering the can body with a lid and then tightening an edge portion. This can lid wrapping machine
Usually, it is arranged in the can transfer path of the turret mechanism which is a can transfer device. A lifter that moves the can up and down is built in the turret mechanism, and the can barrel sent from the can barrel feeder is placed on the can mounting table of the lifter and fed from the can lid feeder. Cover the can body with the coming can lid. This is transferred to the winding tightening position by the turret mechanism and the lifter. As for the winding tightening position, the chuck stands by at a fixed position corresponding to the length of the can body of the can to be wound. The lifter rises toward the chuck, and the lifter pressurizes the chuck through the can body and the can lid. In this way, when the can body and the can lid are clamped by the chuck and the lifter, the winding roll is brought into pressure contact with the edge portion where the can body and the can lid are in contact with each other to perform the winding. At this time, the pressure for holding the can body and the can lid, that is, the pressure of the lifter is very important. If this pressure is insufficient, a gap will be created between the can lid and the can body, resulting in poor sealing.
From the viewpoint of sealing, higher pressure is preferable. However, if the pressure is excessive, buckling of the body of the can may occur, causing poor appearance and cracking of the can. On the other hand, the durability against the pressure received from the lifter differs depending on the material, diameter and height of the can body. Therefore, it is necessary to adjust the pressure of the lifter whenever the material and size of the can body to be processed are changed. Conventionally, a device as shown in FIG. 2 has been used as a lifter incorporating such a device for adjusting pressure. In the lifter shown in the figure, the driven roller 2 attached to the lifter base 1 comes into contact with a cam surface (not shown) on the turret side to move up and down. A lifter shaft 3 is rotatably attached to the lifter base 1 and is connected to a rotating portion 4. The lifter shaft 3 is screwed with a screw 5 serving as a spring base, and a pressure spring 6 is arranged on the screw 5.
A screw 7 is attached to the center of the upper surface of the screw 5 to prevent the pressure spring 6 from being displaced. The pressure spring 6 is held by a adjusting screw 8 screwed into the center hole of the lifter rotary shaft 10 via a spring washer 9. In order to prevent the adjusting spring 8 from being displaced, the adjusting screw 8 has a small-diameter portion without a screw thread at its tip, which is inserted into the center of the pressing spring 6. The driver of the adjusting screw 8 is usually a hexagon socket. It should be noted that the adjusting screw 8 has a hole through which oil passes. A can placing table 11 is tightly attached to the lifter rotating shaft 10 with three bolts 12, so that when the contents in the can such as water or drinking water are spilled, the side of the lifter rotating shaft 10 side comes from the gap of the can placing table 11. I try not to penetrate it. Reference numeral 13 denotes a gear, which meshes with a drive gear (not shown) for rotating the rotating portion 4. When the material and size of the can body to be processed are changed by the above apparatus, the lifter pressure is adjusted as follows. First, the three bolts 12 are pulled out, and the can placing table 11 is removed. Then, the lifter rotating shaft 10 appears, and the adjusting screw 8 screwed into the center hole thereof is inserted into a wrench and rotated to adjust the height at which the pressing spring 6 is held down. As a result, the compression length of the pressure spring 6 changes, and the pressure of the lifter can be adjusted.

[Problems to be solved by the device]

In such a conventional device, since the can mounting table 11 is tightly attached with three bolts 12, it takes a lot of time and effort to remove it when adjusting the lifter pressure. Further, as a recent tendency, since various kinds of canned goods are manufactured on the same manufacturing line, the material and size of the can body to be processed are frequently changed, and the frequency of adjusting the lifter pressure is accordingly increased. Therefore, the bolt 12 and the wrench that operates it are often damaged. Moreover, recently, in order to speed up the production line, a can lid wrapping machine with a large number of seaming heads is used (therefore, the number of lifters also increases), so the effort of adjusting the lifter pressure is also increased. It will take much more. Since the length of the mold change time on a high-speed production line greatly affects the production efficiency,
There has been a demand for shortening the lifter pressure adjustment time. The present invention solves the above-mentioned drawbacks of the conventional device and provides a lifter pressure adjusting device for a can lid wrapping machine, which allows easy and quick adjustment of the lifter pressure.

[Means for Solving the Problems]

A lifter pressure adjusting device of a can lid winding machine to which the present invention for solving the above problems is applied will be described with reference to FIG. 1 corresponding to an embodiment. It should be noted that FIG. 1 is a partially exploded view in order to facilitate understanding of the shape of each part. As shown in the figure, the lifter pressure adjusting device of the present invention is
An adjusting screw 8 screwed onto a lifter rotating shaft 10 to which a can placing table 11 is attached is engaged with a pressure spring 6 supported by a lifter base 1, and a fixed chuck (not shown) and a can placing table are provided. The pressure from the pressure spring 6 received by the can and the can lid sandwiched between 11 and 11 can be adjusted by advancing and retracting the adjusting screw 8. A driver 14 is rotatably held through the can mounting table 11 and a tip portion 14 of the driver 14 is held.
a is inserted into the operation hole 8a of the adjusting screw 8.

[Action]

As described above, since the tip portion 14a of the driver 14 is inserted into the operation hole 8a of the adjusting screw 8 in a normal state, the adjusting screw 8 is advanced and retracted only by turning the driver 14, and the pressure spring received by the can and the can lid is received. The pressure from 6 can be adjusted.

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded cross-sectional view showing a main part of an embodiment of a lifter pressure adjusting device of a can lid winding machine to which the present invention is applied (the omitted parts are the same as those in FIG. 2). As shown in the figure, the pressure spring 6 is arranged on the screw 5 which functions as a spring base. The screw 5 is screwed into the lifter shaft 3 rotatably attached to the lifter base 1 (see FIG. 2). A screw 7 is attached to the center of the upper surface of the screw 5 to prevent the pressure spring 6 from being displaced. The pressure spring 6 is held by a spring washer 9 by an adjusting screw 8 screwed into the center hole of the lifter rotating shaft 10. In order to prevent the adjusting spring 8 from being displaced, the adjusting screw 8 has a small-diameter portion without a screw thread at its tip, which is inserted into the center of the pressing spring 6. As the operation hole 8a of the adjusting screw 8, a hexagonal hole is used as shown in the BB view. It should be noted that the adjusting screw 8 has a hole through which oil passes. The can holder 11 is rotatably pierced through the driver.
14 are held. The head 14b of the driver 14 is embedded in the counterbore hole of the can mounting table 11. Head 14
A hexagonal hole 14c is formed in b, and the driver 14 can be turned with a hexagonal wrench. An O-ring 16 is fitted in the groove of the can placing table 11 in the middle of the driver 14 so that water and the like spilled on the can placing table 11 will not penetrate into the lifter rotating shaft 10 side. Further, a snap ring 15 is fitted to the driver 14 to prevent it from coming off the can placing table 11. The tip portion 14a of the driver 14 is aligned with the operation hole 8a of the adjusting screw 8 as shown in the AA view,
A part is cut away to form an oil passage between the hexagonal operation hole 8a. In this way, the can placing table 11 holding the driver 14 is fastened to the lifter rotating shaft 10 with bolts 12 (only one is shown). As a result, the tip portion 14a of the driver 14 is inserted into the operation hole 8a of the adjusting screw 8. When adjusting the lifter pressure in order to change the material, diameter, height, etc. of the can body to be processed with the lifter pressure adjusting device of the above can lid wrapping machine, operate the bolt 12 to operate the can placing table 11 You don't have to remove
However, if the wrench is inserted into the hexagonal hole 14c of the driver head 14b and turned, the adjusting screw 8 advances and retreats, and the pressure from the pressure spring 6 received by the can and the can lid can be adjusted.

[Effects of the Invention] As described in detail above, the lifter pressure adjusting device of the can lid wrapping machine to which the present invention is applied does not require the work of temporarily removing the can placing table to easily and quickly adjust the lifter pressure. it can. There is no loss or damage to parts. Normally, one turret mechanism is equipped with 4 to 18 lifters, and thus the labor-saving effect is great by simplifying the adjustment of the lifter pressure.

[Brief description of drawings]

FIG. 1 is an exploded sectional view showing a main part of an embodiment of a lifter pressure adjusting device of a can lid wrapping machine to which the present invention is applied, and FIG. 2 is a sectional view of a conventional device. 1 …… Lifter base 2 …… Following roller 3 …… Lifter 4 …… Rotating part 5 …… Spring base screw, 6 …… Pressure spring 8 …… Adjustment screw, 8a …… Adjustment screw Operation hole 10 …… Lifter rotating shaft, 11 …… Can mounting table 12 …… Bolt, 14 …… Driver 14a …… Driver tip 14b …… Driver head

Claims (1)

[Scope of utility model registration request] 1. An adjusting screw that is screwed onto a lifter rotating shaft to which a can placing table is attached is engaged with a pressure spring supported by a lifter base, and is sandwiched between a fixed chuck and the can placing table. A lifter pressure adjusting device capable of adjusting the pressure from the pressure spring received by the can and the can lid by advancing and retracting the adjusting screw, wherein a driver is rotatably held through the can mounting table. A lifter pressure adjusting device for a can lid wrapping machine, wherein a tip portion of the driver is inserted into an operation hole of the adjusting screw.