JPH1133841A - Fit-in device for packing to cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fit-in device which allows certain fit-in mechanical operation for a packing to a cap for use in a drum. SOLUTION: A recessed hole is provided in a working station, a cap 20 for a drum is sunk thereto so that only the threaded portion is embedded, a packing 21 is placed on an upper flange 20a incliningly such that one radial part of the packing lens on it while the other is positioned outside the cap, the arc-shaped tip of a pressing plate 7 attached to an air cylinder is allowed to abut to the upper inside surface of the inclined packing and pressed to forcibly get over the flange part 20a of the cap 20 to fit the packing 21 in a packing groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for fitting a rubber or plastic packing into a metal cap used for a drum for filling and packaging an oil solution, a chemical solution and the like.

[0002]

2. Description of the Related Art A liquid outlet and an air outlet are provided in a flat (lid) portion on the upper surface of a drum can, and a metal cap is screwed into the inlet. This cap has a groove that goes around between the cut-up portion of the external thread and the flange on the upper surface, and a rubber or plastic ring-shaped packing (usually referred to as an O-ring) is fitted therein. . The packing is designed so that it does not come off easily from the cap, or its fit is in a so-called "tight fit" (static fit) in order to ensure a sealing effect of the liquid content. Therefore, the mounting operation requires a very large force, but currently depends on human labor. Therefore, it is inefficient and a type of work that is avoided by employees.

[0003]

The drums used in Japan include those made not only from Japan but also from other countries. These caps have almost the same outer diameter and screw shape, and can be applied to any drum. There is so-called compatibility, but the height (height) is manufactured at 14 to 17 mm regardless of domestic and foreign products. ,
There is a 2-3mm error. It has been considered difficult to mechanize the packing mounting work due to the error in this height. Therefore, a dimensional error in the cap is absorbed by a spring mechanism and automatic machining is performed, thereby trying to release the packing fitting work, which is heavy labor, from manual work.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to mechanically and rationally fit a packing formed of rubber or plastic into a metal cap for a drum can. That is, the cap is conveyed to a work station with its screw portion downward, and immersed to a required depth in the depression, and the packing sent by another automatic conveyance device is inclined on the upper surface of the flange of the cap. The packing head is placed on the back surface of the pressing plate, and the pressing head formed on the back surface of the pressing plate is slidably moved to the upper surface of the plunge of the cap. This is a structure that fits into

Further, in order to absorb a dimensional error in the height of the cap, the pressing plate is urged downward by a compression spring so that the lower surface of the pressing head always moves in a state of being in close contact with the upper surface of the cap. It is. For example,
When the height of the cap is higher than a standard one, the compression spring is compressed to absorb an error in the height. In this case, it is necessary that the pressing force on the upper surface of the cap does not rise against the force required to stretch the packing, and is about 4 to 10 kg /.
cm square.

Further, the shape of the tip of the pressing head is formed into an arc of 1/3 to 1/4 circle so that the packing leaning on the cap in an inclined manner is not sandwiched between the bottom surface of the pressing head and the upper surface of the flange. It is a part, and the part behind it is inclined and cut in a rearward spread shape.

[0007]

The pressing head formed on the lower surface of the tip of the pressing plate is engaged with one end of the inner diameter of the packing, which is placed on the upper surface from the side surface of the cap for the drum can and slides on the upper surface of the flange of the cap. Thereby, the packing smaller in diameter than the flange easily goes over the flange and fits into the packing fitting groove formed in the neck. Further, as described above, the dimensional error in the height of the cap is absorbed by the expansion and contraction of the ridge that urges the pressing plate toward the bed, and the packing fitting / inserting operation can be mechanized.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for packing and fitting a drum cap according to the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a packing fitting device according to the present invention, and FIG. 2 is a side view partially showing the packing fitting device.
In this packing fitting device 1, the work bed 2
The work transfer device 3 is formed on the left side of the figure, and the packing fitting device 4 is formed on the right side.

The work transfer device 3 is composed of two stages, a bed 2 of the main body and an upper bed 3a, and an air cylinder (a hydraulic cylinder may be provided at each end (left side in FIG. 1). (It is called a cylinder.)
Numerals 10 and 11 have their spindles 10a and 11a stretchably mounted on the central work station side. Appropriately shaped holding jigs 10b and 11b for securely transferring the work to the work station are attached to the tips of the respective spindles 10a and 11a. Note that the tip of the upper bed 3a (the center side of the main body) is the bed 2 of the main body 1.
It is configured to end immediately above the depression 2a provided at the center.

Immediately before the upper spindle 10a and the lower spindle 11a, on one side of the bed, an article aligning / transporting machine (not shown, but a commercially available part feeder is used) at one end by vibrating or frying. The feeder rails 5 and 6 with attached parts feeders are connected, and the work put into the parts feeder, that is, the packing from the upper part feeder, the cap for the drum can from the lower part feeder, and the cap for the drum can respectively on the rail. Is supplied continuously just before the work holding jigs 10b and 11b.

A work station formed substantially at the center of the work bed 2 is provided with a male screw 2 of the drum can cap 20.
A recessed hole having substantially the same diameter as the outer diameter of the portion 0c is formed. At the bottom of the depression 2a, an air cylinder 1
2 is mounted with its spindle 12a facing upward, the tip of the spindle supports the bottom of the cap which is transferred and immersed, and the packing fitting groove 20 of the cap is mounted.
b is held so as to be exposed above the surface of the bed 2, and is mounted so as to be able to move up and down so as to float the entire cap through the recessed hole 2a after the packing fitting operation is completed.

A packing fitting device 4 is mounted on a bed symmetrical to the work transfer device 3 (right side in FIG. 1) with the work station as a center. That is, a packing-fitting air cylinder 13 is mounted on the right end of the bed 2 with its insertion spindle 13a facing the work station side.
A pressing plate 7 which is rotatable in the up-down direction is provided at a tip end of the pressing plate 7c.
Have been. The width of the pressing plate 7 is slightly larger than the diameter D of the flange 20a of the cap, and as shown in FIG.
A circular arc-shaped head 14a having a radius of 1/3 to 1/4 which is substantially the same as the radius of a is formed, and an angle of 20 to 30 [deg.] from both ends of the circular arc with respect to the center axis of the radius. And a pressing head 14 having a total length L slightly longer than the radius of the cap from the end of the radius is provided.

On both sides of the pressing plate 7, rollers 7a, 7
The guide rail 8 is attached to the bed 2 corresponding to the roller, and the guide rail 8 is inclined downward toward the work station. The inclination is the same as the pressure plate 7 described above.
Is advanced by the air cylinder 13 and reaches the upper surface of the cap at the work station, the lower surface of the pressing head 14 attached to the lower surface thereof comes into contact with the upper surface of the flange 20a of the cap.

On the upper surface of the pressing plate 7, a housing 1 is provided.
A pressing roller 9 to which a spring 9a is mounted via 5 is attached so as to urge the pressing plate 7 downward. Therefore, the pressing plate 7 is advanced by the air cylinder 13 and the tip thereof is lowered according to the inclination of the guide rail 8, and the flange 20a of the cap at the work station is provided.
When the height of the cap is high, the spring 9a is compressed to ensure that the pressing head moves smoothly on the upper surface of the cap. Adjustment according to the height of the cap is also possible with the screw 9b.

The depression 2 as the work station
a, and a work collection port 2b is opened on the surface of the bed 2 between the packing and the air cylinder 13 for fitting.
It is connected to the collection container B shown below. These air cylinders are sequentially controlled by a power supply device and a sequence control device.

The main mechanism of the packing fitting device according to the present invention is as described above. Next, the operation will be described. The packing 21 continuously aligned and raised by a part feeder such as a work vibration or a lifting device (not shown) slides down the feeder rail 5, and the cap 20 slides down the lower feeder rail 6 by another part feeder. Each one in turn cylinder 1
It reaches the bed just before 1,10.

The cap 20 is connected to the air cylinder 10
Is moved to the work station by the advance of the spindle 10a by the operation of the above, the male screw 20c part is immersed in the depression 2a opened there, and is held by the spindle tip of the lifting / lowering air cylinder 12 mounted inside the depression. Therefore, the packing groove 20b and the flange 20a are set to be exposed from the bed 2 surface. Then, the spindle 10a returns to the original position.

Next, the packing 21 in front of the upper air cylinder 11 is sent out by the holding jig 11b attached to the spindle 11a without moving the upper bed 3a from side to side, and falls from the edge of the upper bed. Almost the radius is the cap 2 in the work station
0, the remaining radius is protruded onto the bed of the packing fitting device 4 side, that is, the flange 20a
Lean on the top circumference and place it in an inclined state.

Next, the air cylinder 13 for inserting the packing is operated, and the pressing plate 7 supported by the spindle is operated.
To move forward. When the pressing head 14 reaches the cap 11 of the work station, the roller 2 b is at the inclined position of the guide rail 8, and the lower surface of the pressing head 14 contacts the upper surface of the flange 20 a of the cap 20,
Advance along that plane. If the height of this cap is higher than the standard, the back surface of the pressing head contacts the top surface of the cap and does not descend further,
Therefore, a gap is formed between the guide rail 8 and the roller 7a, but since the pressing plate 7 is urged to the bed surface by the spring 9a mounted on the pressing roller, the lower surface of the pressing head 14 is always on the surface of the flange 20a. In contact.

As described above, the round surface of the tip of the pressing head 14 advanced by the air cylinder 13 enters the inner diameter of the packing placed in an inclined manner. This packing 2
It is desirable that the center of 1 is on the axis connecting the center of the cap 20 and the center position of the arc formed at the tip of the pressing head 14, but if there is a slight error, it is close to the tip of the pressing head. Since the notches 14b are formed on both side surfaces of the pressing head, a part of the packing can be prevented from being sandwiched between the back surface of the pressing head and the surface of the cap, so that the tip of the packing can be pushed forward without any trouble.

When the spindle 13a of the device-side air cylinder 13 is further extended, the inclined packing is moved toward the workpiece transfer device by the tip arc portion of the pressing head 14 engaged with the upper inner diameter. Moving. As a result, the inner diameter on the lower side of the packing is located below the flange 20a formed on the cap and is engaged with the packing groove 20b, and by further advancing, both sides of the packing are widened by the side surfaces of the pressing head 14. When the tip of the pressing head 14 passes over the top of the cap, the packing tip slides down from the pressing head when the tip of the pressing head 14 passes over the cap 20g.
Will be fitted.

Next, when the pressing head 14 further advances past the upper surface of the cap, the elevating air cylinder 12 operates to raise the bottom surface of the cap 20 to the bed 2 surface. The raised cap 20 is located behind the pressing head 14, and then, when the spindle 13 a is retracted by the air cylinder 13, the cap 20 slides on the bed 2 by the rear surface of the pressing head, and the collecting hole 2 b
It will be stored in the container B installed at the lower part.
Then, a new cap 20 is formed by the lower air cylinder 10.
The next step of transferring the to the work station proceeds as before.

[0023] Such a series of operations is automatically performed by a sequence control sequentially as one process. In the meantime, it is necessary to add the work to the parts feeder, but there is no other need for human power.

[0024]

In the packing mounting apparatus according to the present invention having the above-described structure, the metal cap for the drum can is sunk into the recessed hole of the work station up to the upper end of the screw portion, and the packing is mounted thereon in an inclined manner. The packing with tight fitting is easily fitted to the metal cap because the operation of pressing and fitting the packing with a semi-circular flat plate at the enlarged diameter is performed mechanically. Is now possible. Therefore, there was no leakage of the liquid material in the drum.

The tip of the pressing plate attached to the spindle of the air cylinder for fitting is movable up and down, and the amount of drop of the tip can be freely adjusted by a spring device. I can do it.

Since the inclined linear portion is formed following the curved surface at the tip of the pressing head for fitting the packing, the packing is not sandwiched between the pressing head and the cap surface so that the fitting becomes impossible.

[Brief description of the drawings]

FIG. 1 is a plan view showing a packing device for a cap of a drum can according to the present invention.

FIG. 2 is a side view showing the packing mounting device shown in FIG. 1 in a partial cross section.

FIG. 3 is a side view showing a main part in a state where a packing is placed on a metal cap by a partial cross section.

FIG. 4 is a plan view showing a shape of a pressing head for fitting a packing into a cap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 2 Work bed 3 Work transfer apparatus 4 Packing fitting apparatus 5, 6 Feeder rail 7 Press plate 8 Guide rail 10, 11, 12, 13 Air cylinder 14 Press head 20 Cap 21 Packing

Claims (3)

[Claims] 1. A drum can cap having a body formed with a male screw and a flange having a larger diameter than the screw through a packing fitting groove. The bed is sent forward by an air (or hydraulic) cylinder provided at one end of the bed, and is sent to a depression formed in the center of the bed in the front so that the packing fitting groove projects above the bed surface. Then, the rubber or plastic packing sent from another parts feeder is placed so that approximately half (semicircle) is located forward of the center of the cap, and the remaining half is located on the bed surface. An arc-shaped pressing head attached to an air (or hydraulic) cylinder mounted on the other end (front side) of the bed is mounted on the cap in an inclined manner. Engage the upper inner diameter of the packing and slide the pressing head over the top of the cap with the air (or hydraulic) cylinder so that the packing passes over the flange of the cap and fits into the packing fitting groove A packing fitting device characterized in that the packing fitting device has a structure for causing the packing to fit. 2. The press head is mounted on a lower surface of a packing press plate while being urged downward by a spring, and the packing press plate is pivotally mounted on an insertion piston of an air (or hydraulic) cylinder so as to be vertically rotatable. The pressing plate is supported, and the pressing plate travels on a guide inclined downward as it moves toward the center of the bed, and when the lower surface of the pressing head reaches the cap at the work station, the lower surface of the pressing head contacts the upper surface of the flange. The packing fitting device according to claim 1, wherein the packing fitting device is configured to be lowered to a position. 3. The shape of the pressing head which engages with the inner diameter side arc of the packing placed obliquely on the upper surface of the cap has a radius substantially equal to the radius of the flange at the upper end of the cap. A four-circle arc shape, 20 to 3 with respect to an axis connecting the center of the arc and the center of the arc from both ends of the arc
2. The packing fitting device according to claim 1, wherein the packing fitting device has a shape cut linearly with an inclination of 5 [deg.].