JP3505835B2 - Capping equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
Cap with kin, for example, with packing inside
Lug caps (with multiple lugs on the inside
So that the lugs engage the threads at the mouth of the container.
Cap), the inner packing is compressed and deformed
Capping with screws to the mouth of the container
The present invention relates to a switching device. 2. Description of the Related Art A cap having a seal packing therein.
A rug cap will be described as an example of a cap. container
The lug cap screwed into the mouth of
As shown, on the inner peripheral surface of the skirt portion 6a of the cap 6,
At equal intervals in the circumferential direction, a plurality of protrusions called independent lugs 7 are provided.
A lug 7 is provided in the container 8 (see FIG. 4).
A plurality of divided threads 9 provided at the mouth of
(Shown in phantom lines in FIG. 3).
ing. And this rug cap 6
After the completion of the sealing, the inside of the container 8 can be completely sealed.
As shown in FIG.
You. The lug cap 6 is attached to the container 8 with a cap.
When performing capping, place the cap on the cap holding means.
And hold the cap 6 toward the container 8 below.
By rotating the holding means while lowering it,
The lug 7 of the plug 6 is provided with a screw thread 9 provided at the mouth of the container 8.
To be concluded. Tokuhei 3-11994
The publication discloses such a capping device for a rug cap.
An example is shown. In FIG. 3, a lug cap 6 is screwed to a container 8.
When tightening, the screw 9 of the lug 7 at each stage
The position of the lug cap 6 is shown in FIG.
Will be described. First, the hand holding the cap
Lower the step to fit the lug cap 6 into the mouth of the container 8
You. This position is the lug 7 temporary tightening start position (see FIG. 3).
7A). Subsequently, the cap holding means rotates and the capping
The initial stage of this capping (temporary tightening section in FIG. 3)
In the interval K), the lug 7 of the lug cap 6 and the thread of the container 8
The screw is tightened with no load between
The packing 6b inside the lug cap 6
The person sits (7B in FIG. 3). In this position 7B, the lug 7
The inner surface of the thread 9 is engaged. After that, the conventional
In the ping device, to further rotate the cap 6
As the lug 7 advances with respect to the thread 9 of the container 8,
While compressing and deforming the packing 6b, further tightening is performed.
Now (final fastening section L in FIG. 3). Closure of cap 6
After the angle has been reached (7C in FIG. 3),
Block the transmission of torque to the cap holding means and tighten the screws.
Complete. [0004] As described above, conventionally used in general
In the capping device of the rug cap, the cap 6
After the packing 6b is seated on the mouth of the container 8, it is compressed.
Generated by an axial force due to the reaction force of the packing 6b
The friction between the screws (lugs 7 and threads 9) becomes extremely large
Therefore, when the strength of the screw (lug 7) on the cap 6 side is weak
In the meantime, the lug 7 is deformed and
There was a possibility that a phenomenon called "screw fool" would occur. [0005] Therefore, the above problems are prevented from occurring.
The packing in the cap seats on the mouth of the container.
The frictional force between the screws generated by the packing reaction
It can be reduced and re-tightened without friction.
A squeezing lid fastening machine has already been proposed (Japanese Patent Laid-Open No. 54-12 / 1979).
No. 7783). The above publication (Japanese Patent Laid-Open No. 54-127783)
The lid tightening machine described in (Report) supports the lid attached to the container.
And the lid support device is rotated about the axis of the lid.
Device and when a predetermined torque is applied to the lid on the container
To allow sliding between the lid support device and the rotating device.
And simultaneously engages the lid when the above torque is applied.
Cover that applies axial pressure to the lid facing the container to be mounted.
Pressure device. This lid pressurizing device is
With the cylinder to be inserted
And a shaft fixed to the piston.
Rotation is performed through the friction plate type clutch device through the lid support device.
To the device. With this lid tightener,
Torque increased due to friction between screws after seating
At the time of sliding by the friction plate type clutch device,
After that, open the air circuit and introduce air pressure into the above cylinder
And increase the load on the lid support device to deform the packing with that force.
To retighten without screw friction.
ing. [0007] As described above, the friction plate type
It senses that the torque has been increased by the clutch device,
Then, increase the load on the cap holding means
Cannot perform accurate torque detection,
It was difficult to ping. Also, friction plate type
The torque exceeds the specified value due to the clutch device.
If the clutch is configured to slide when
The set torque that can be detected by the slippage of the
Since the load between the gaps increases, the lug cap
When the strength of the screw (lug) on the cap side is small
In this case, there was a risk that this lug would be deformed. [0008] The present invention has been made to eliminate the above disadvantages.
The cap is used when the tightening torque is extremely small.
Slip the holding means and the cap, and then
When a load is applied to the cap holding means and the cap is pushed down,
First of all, cap the cap securely
The purpose of the present invention is to provide a capping device
Things. [0009] A cappin according to the present invention.
Device holds a cap with packing inside
Rotating the cap holding means and the cap holding means
Rotating means, and elevating means for elevating the cap holding means
And a cap holding means for holding the cap.
Lower toward the lower container and remove the packing inside the cap.
Capping while compressing and deforming,
Further, the upper surface of the cap is sucked into the cap holding means.
Suction means to be attached and a pressing body capable of holding the outer periphery of the cap
And a position where the pressing body is separated from a position where the pressing body is pressed against the cap.
And moving means for moving the
Load the cap holding means in the direction of the container below.
And a load applying means for adding. In the above capping device, the cap holding means is provided.
When the upper surface of the cap is suctioned by the suction means provided in
In both cases, the pressing body is retracted to separate the
The holding means is lowered and rotated. Cappin
In the early stages of the process, the cap screw is
Since they are not engaged, the capping
Is performed. The packing inside the cap is the mouth of the container
When seated, the tightening torque increases and the cap is held
The means slips against the cap. After that,
Load is applied downward to the
Move the body and press the cap
Doing Compress packing with load applying means
Capping is performed, so tightening torque is excessive.
And stable capping is performed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to illustrated embodiments.
FIG. 1 shows a cap of a lug cap according to an embodiment of the present invention.
FIG. 2 is a vertical cross-sectional view showing a main part of the operating device. This cappin
A capping head (indicated by reference numeral 2 as a whole)
The lug cap 6 to the chuck 4 provided at the lower end of the
To be held and disposed below the capping head 2.
Container held by the container gripper 84 (see FIG. 4)
8 while rotating the capping head 2 down.
Then, the cap 6 is screwed into the mouth of the container 8.
It is designed to be tightened. The lug cap 6
Inside, as shown in FIG. 3, the resin fixed to the inner surface
6b or phosphorus made of an elastic material such as rubber.
A sealing member such as a ring-shaped packing is provided.
The packing 6b is compressed and deformed so that the lug cap 6 is
The inside of the container 8 is completely sealed with the
I am able to do it. Next, the configuration of the capping head 2 will be described.
And will be described in detail. Book of capping device not shown
Of the first spindle 10 supported by the body and driven to rotate
A generally cylindrical housing 12 is fixed to the lower end.
The chuck 4 is housed in the cylindrical housing 12.
The second spindle 14 attached to the lower end can be moved up and down
It is supported by. The upper first spindle 10 is
Rotated by rotating means (not shown) such as a motor
At the same time, it is moved up and down by lifting means (not shown) such as a cam.
Is done. In addition, these rotating means and elevating means are as described above.
It is not limited to one. The lower second spindle 14 is a cylindrical housing.
Ascending and descending into the inner cylinder 16 arranged in the upper part of the ring 12
Mating. A key 18 is provided on the outer surface of the second spindle 14.
Is fixed, and a vertical direction formed on the inner surface of the inner cylinder 16 is formed.
The second spindle is slidably fitted in the long groove 16a.
Is connected to the inner cylinder 16 in the rotational direction and
It can be ascended and descended. Also, the inner cylinder 16
In the cylindrical housing 12 via the ball bearing 17
Supported and rotated relative to the cylindrical housing 12
Has become possible. In the upper end portion of the cylindrical housing 12,
The bottomed cylindrical body 20 that is arranged, and
A spring is inserted between the second spindle 14 and the end fitted.
And the second spindle 14 is always attached downward.
To the chuck portion 4 described in detail later.
Is applied in the direction of the container 8. An outer peripheral side of the inner cylinder 16 is provided with a torque regulating device 2.
4 is provided, and at a torque equal to or less than a predetermined value,
Second spindle 14 and inner cylinder 16 rotating integrally therewith
The upper first spindle 10 and the first spindle
Of the outer cylindrical housing 12 fixed to the
Connect the body and rotate integrally, tighten the cap 6
When the torque applied to the chuck portion 4 is
When the value exceeds the set value, the upper first spindle 10 and
A cylindrical housing 12 and a second spindle 14 therein
And the chuck section 4 is relatively rotated.
From the first spindle 10 to the second spindle 14
The rotation of the chuck portion 4 is stopped by interrupting the rotation transmission. The lower side of the cylindrical housing 12, that is,
Below the torque regulating device 24,
To apply a load in the direction of the lower container 8
(A load applying means) 26 is provided.
You. Internal space of the cylinder part 26 of the second spindle 14
Bearings 28, 30
, The piston 32 is relatively rotatable and integrated.
It is mounted so that it can move up and down. This piston 3
The sealing member 34,
36 is fitted to keep the inner and outer surfaces of the cylinder 26 airtight.
The piston 32 slides in
The interior of the cylinder 26 is divided into upper and lower chambers 38 and 40.
An air inlet 42 is formed in the cylindrical housing 12, and
In a chamber 38 above the piston 32 of the cylinder 26,
Air can be introduced from an air pressure supply (not shown)
Has become. The cylindrical housing of the second spindle 14
The chuck part 4 is provided at a portion projecting downward from the
Is provided. The lower end of the second spindle 14
Above and above, a cap case shaped almost like a cup
44 is fixed with the opening facing downward. 2nd spin
A portion extending into the cap case 44 at the tip of the dollar 14
Between the outer peripheral surface of the cap case 44 and the inner peripheral surface of the cap case 44.
The descending cam 46 is slidably fitted. 2nd spindle
Between the outer peripheral surface of the distal end portion 14 and the inner peripheral surface of the lifting cam 46.
And the outer peripheral surface of the lifting cam 46 and the inside of the cap case 44.
Seal members 48 and 50 are attached between the peripheral surface
The lower surface of the cap case 44
And a pressure chamber 52 sealed between the upper surface of the lifting cam 46 and
Is formed. Lower end of cup-shaped cap case 44
In the opening, the horizontal extending over the inside of the cap case 44
The horizontal guide plate 54 is fixed
On the sheet 54 toward the axis of the chuck 4
A movable sliding body 56 is mounted. This sliding body 56
The tapered surface 56a formed on the upper part is
Abuts against a tapered surface 46a formed on the lower surface of
When the lifting cam 46 is lowered, the axis of the chuck 4 is
It is extruded in the direction. Sliding body
A chuck rubber 58 is fixed on the inner peripheral surface of
And the sliding body 56 is moved forward in the axial direction of the chuck 4.
When the lug cap 58 advances, the chuck rubber 58
The lug cap 6 is held by being pressed against the outer peripheral surface of the lug. The cylinder 26 of the cylindrical housing 12
Below, is connected to an air pressure supply source not shown
An air inlet 60 for opening and closing the chuck rubber is provided.
You. The air inlet 60 is provided at a lower part of the cylindrical housing 12.
The radial passage 62 formed in the
A concave groove 64 on the inner surface, formed inside the second spindle 14
Through the radial and axial internal passages 14a, etc.
Pressure chamber between the cap case 44 and the lifting cam 46
52. This air pressure source
When air is introduced into the pressure chamber 52, the lifting cam 46 is pressed.
And slide down by the tapered surface 46a at the lower end.
56 is pushed inward in the radial direction. On the lower end surface of the second spindle 14, a small
The cup-shaped support cylinder 68 is fixed with the opening facing downward.
Have been. The upper surface of the support cylinder 68 and the lift cam 46
A spring 70 is interposed between the inner surface of the
46, the second spindle 14 and the cap case 44
Is constantly biased upward. On the other hand, the support cylinder 68
Can be moved up and down relative to the outer peripheral surface of the
Cap receiving member 72 is mounted. This cap
The support member 72 is provided between the upper surface and the support cylinder 68.
Always downward by spring 74 loaded between surfaces
Is being urged toward. On the outer surface of the support cylinder 68,
Roller 76 is fixed to the cylindrical portion of the cap receiving member 72.
It is engaged in the formed vertically elongated notch groove 72a,
Cap receiving portion urged downward by spring 74
The roller 72 is attached to the upper end of the cutout groove 72a.
The lower limit is regulated by the combination. The lower end surface of the cap receiving member 72 has
Shape of the upper surface of the lug cap 6 held by the hook 4
A concave portion 72b having a shape matching the shape is formed. Ma
The magnet 78 is provided inside the cap receiving member 72.
Is embedded, from the cap supply means described later
The upper surface of the supplied cap 6 has the above-described cap receiver.
The magnet 78 fits into the concave portion 72b of the member 72, and
And is taken out. In addition, the cap 6
For centering and holding, the cap receiving member
It is preferable to provide the concave portion 72a in the
It is also possible to omit the recess. With the capping head 2 according to the above configuration,
The operation of the provided capping device will be described. FIG.
Is the entire capping device 100 according to one embodiment of the present invention.
FIG. 3 is a diagram showing a simplified arrangement of the body, and a container transport conveyor.
The container 8 conveyed by the inlet 80
The container 82 is positioned at a predetermined interval by the
Transfer to the capping device 100 at the transfer position A
Is done. The capping device 100 has a circumferential direction and the like.
The capping head 2 according to the above configuration is provided at intervals.
And each capping head 2 is provided with a capping device.
Rotation (revolution) by rotation of the entire 100 in the direction of arrow R
While rotating about the axis of the first spindle 10
(Rotate). Below these capping heads 2,
Is the container 8 supplied from the inlet starwheel 82.
Gripper 84 for receiving and holding the container is openably and closably arranged
And held by the container gripper 84.
The capping head 2 is lowered with respect to the
Capping by rotating
U. Note that the capping head 2 is rotated while being lowered.
First, lower the capping head 2
Then, the cap 6 is fitted into the opening of the container 8 and then rotated.
You may make it. The key from the entrance star wheel 82
Above the transfer position A of the container to the capping device 100
Is provided with cap supply means (for example, the cap shown in FIG. 4).
A disk 86) is provided, and the cap supplier
The lug cap 6 supplied by the step 86
At the unloading position P (see FIG. 2),
It is taken out by the cap receiving member 72. The capping device 100 transfers the container
At the position A and the cap removal position P, the container 8
Receive the cap 6 and remove this cap 6 while rotating.
Screw it into the mouth of the container 8 to perform capping.
The container 8 after the capping is completed is delivered to the container.
To the outlet starwheel 86 at
And discharged onto the conveyor 88. Next, the above capping device 100
Regarding the capping step, FIGS.
A description will be given with reference to FIGS. Up
At the container transfer position A, the entrance starwheel 82
Then, the container 8 is supplied into the opened container gripper 84.
At the upper cap removal position P, the chuck
The cap 6 is removed from the cap disk 86 by the part 4.
(See FIG. 4). Cap receiver in chuck part 4
The member 72 has a concave portion on the lower surface side that matches the upper surface of the cap 6.
72b are formed, and the cap 6 is
b and is embedded in the cap receiving member 72.
The magnet 78 is attracted and taken out by the magnet 78 (FIG. 1).
On the right side of the cap receiving member 72). When removing the lug cap 6,
The entire ping head 2 is in the raised position,
There is a cutoff between the opening / closing air inlet 60 and the air pressure supply source.
Have been. Therefore, the cap case 44 and the lift cam 46
Since no air is introduced into the pressure chamber 52 between
The lifting cam 46 is raised by a spring 70,
The sliding body 56 to which the rubber block 58 is attached
Retreating. At this point, the load applying means
Pressure air is also introduced into the chamber 38 above all the cylinders 26.
Not entered. The upper cappy holding the cap 6
Container head 8 and a lower container grip holding the container 8.
The upper part 84 is positioned vertically over the range of AB in FIG.
And are integrally rotated in the direction of arrow R in FIG.
During this time, the container gripper 84 closes and grips the container 8
And the capping head 2 is gradually lowered
(See FIG. 5). While the capping device 100 continues to rotate.
Then, the capping head 2 is further lowered, and the chuck portion
The cap 6 attached to the magnet 78 of the container 4
It is fitted into the mouth (see position C in FIG. 2 and FIG. 6). Ki
When the cap 6 is fitted into the mouth of the container 8, the cap is closed.
The lug 7 of the plug 6 is at the position 7A in FIG. Cap 6
After being fitted into the mouth of the container 8, the cap receiving member 72
The cap 6 attracted to the magnet 78 is
The screw of the mouth of the container 8 is screwed by the rotation of the ping head 2.
Tightening is performed. Screw tightening at this stage is
Before the packing 6b on the inner surface of the container is seated on the mouth of the container 8.
This is the tightening step (the range of K in FIG. 3),
Moves from the position 7A to the position 7B in FIG. This
In the temporary fastening step, the second spindle 14 and the chuck
For the part 4, the spring above the second spindle 14
And the second spindle 14 and the chuck
Only the load due to the weight of the locking portion 4 is applied. When the cap lug 7 reaches the position 7B in FIG.
The screw 9 moves to enter the lower surface side of the thread 9 of the container 8.
Packing 6b is pressed against the inclined portion of the container.
8, the tightening torque increases afterwards.
You. Then, the tightening torque is applied to the magnetic force of the magnet 78.
When the suction force exceeds the suction force of the
The chuck 4 slips against the
Step 6 stops rotation (D position in FIG. 2 and FIG. 7).
See). Then, as described above, up to the position E in FIG.
Cap receiving member 72 slips against lug cap 6
While the capping head 2 is rotating,
At this E position, the capping head 2
Pressure air is introduced into the solder portion 26. Of the cylinder part 26
Air is introduced into the chamber 38 above the piston 32
And a piston 32 and a second
The spindle 14 is pushed downward, and
A load is applied in the direction of the lower container 8. like this
By applying a load to the inner surface of the cap 6.
The kin 6b is crushed and the cap 6 is
The lug 7 is screwed along the thread 9 while descending
It is. At the time of this final tightening (range L in FIG. 3), the chuck
The part 4 is in the state shown on the left side of FIG. In addition, pickpocket
After starting the load (D position in FIG. 2) and before applying the load
Does not require rotation to the E position,
As the timing of introducing air and introducing load to 26
The lug 7 is surely packed based on the rotation speed of the chuck 4.
It is sufficient that the number of rotations to reach the seating position 6b is secured. Then, immediately (at the position F in FIG. 2)
From the air opening 60 for opening and closing the
Air is introduced into the pressure chamber 52 between the lift cam 46 and
The descending cam 46 is pushed down. When the lifting cam 46 descends,
The chuck rubber 58 is formed by the tapered portion 46a on the lower surface.
The mounted sliding body 56 is attached to the axis of the chuck 4.
And the chuck rubber 58 is pushed out of the cap 6.
The cap 6 is securely held by being pressed against the peripheral surface. This
To apply a load to the capping head 2
The cap 6 is securely held by the chuck rubber 58
In this state, the first spindle 10 is further rotated.
As a result, the lug cap 6 is rotated again,
7 is screwed onto the thread 9 of the container 8. This implementation
In the example, after air is introduced into the cylinder 26,
The air for opening and closing the jack is introduced.
May be introduced at the same time. The cap lug 7 is tightened as shown by 7C in FIG.
When the tightening torque reaches the
And the torque regulating device 24 operates to
Rotational force between first spindle 10 and second spindle 14
Transmission is interrupted, the chuck portion 4 idles, and the capping
End. Then, at position G in FIG.
Air for applying a load in the
Release the air for opening and closing the chuck to the atmosphere, and then
Raise the recording head 2. Container with completed capping
8 is a discharge starhousing at the container delivery position H in FIG.
Delivered to the eel 86 and discharged onto the discharge conveyor 88
You. As described above, the lug 7 of the lug cap 6 is
8 and the packing in the cap 6
At the time of temporary tightening until 6b is seated on the mouth of container 8, key
The cap 6 is not held by the chuck rubber 58,
By holding only by the magnetic force of the slot 78,
Before the tightening torque rises sharply,
6 slipped, and the packing 6b was seated.
Later, a load in the direction of the container 8 is applied to the chuck 4.
To compress the packing 6b, and
Press and hold the cap 6 to perform final tightening
The lug 7 of the cap 6 and the thread 9 of the container 8
Capping with no friction between
And accurate and reliable capping can be performed.
Wear. Also, like the conventional capping device,
Excessive torque or low cap lug strength
It causes deformation and is a phenomenon called "screw fool"
Can be prevented from occurring. In the above embodiment, the cap 6 is taken out.
During the temporary tightening, the chuck rubber 58 is retracted.
It was in the state of being left, but when removing the cap 6
Immediately moves the chuck rubber 58 forward and backward immediately after removal.
The cap 6 by pressing around the cap.
It is also possible to improve the accuracy of interlacing. Also, the above
In the configuration of the embodiment, the magnet
From the removal of the cap 6 to the temporary fastening process
During this period, the cap is attracted by the magnet 78.
However, instead of the magnet 78, the vacuum pressure is
Can also be used. As described above, according to the present invention,
Holding a cap that has packing in the part
Means and rotating means for rotating the cap holding means
And elevating means for elevating the cap holding means,
Lower the cap holding means holding the cap to the lower container
Down to compress the packing inside the cap.
In a capping device that tightens screws while
The cap holding means sucks the top surface of the cap
Means, a pressing body capable of holding the outer periphery of the cap,
Moves the pressure body between the position where it presses against the cap and the position where it separates
And a moving means for moving the cap.
A load that applies a load on the means in the direction of the container below
An additional means is provided, and the cap is rotated by rotating the cap holding means.
The container to the mouth of the container.
The cap slips beyond the suction power of the suction means
Thereafter, a load is applied to the cap holding means, and the cap is moved.
Activating the means to press the pressing body against the outer surface of the cap
To hold the cap and tighten the screws
From the beginning to the end of tightening.
Large friction between the cap screw and the container thread
Capping can be performed without force
Therefore, accurate and reliable capping can be performed.
And, because of the deformation of the cap screw,
This phenomenon can be prevented from occurring.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a main part (capping head) of a capping device for a lug cap according to one embodiment of the present invention. FIG. 2 is a diagram showing an overall arrangement of the capping device. FIG. 3 is an explanatory view showing a process of tightening a lug of a lug cap and a screw thread of a container. FIG. 4 is a diagram showing a first step of a capping step performed by the capping device. FIG. 5 is a view showing a step next to the capping step shown in FIG. 4; FIG. 6 is a view showing a step next to the capping step shown in FIG. 5; FIG. 7 is a view showing a step next to the capping step shown in FIG. 6; FIG. 8 is a view showing a step next to the capping step shown in FIG. 7; [Description of Signs] 4 Cap holding means (chuck) 6 Cap (lug cap) 6b Packing 8 Container 26 Load applying means (cylinder part) 46 Moving means (elevating cam) 56 Moving means (sliding body) 58 Pressing body (chuck rubber) ) 78 Suction means (magnet)

Claims (1)

(57) Claims 1. A cap holding means for holding a cap having a packing therein, rotating means for rotating the cap holding means, and elevating means for raising and lowering the cap holding means. In a capping apparatus in which a cap holding means holding a cap is lowered toward a lower container to tighten a screw while compressing and deforming a packing in the cap, the cap holding means suctions an upper surface of the cap to the cap holding means. Means, a pressing body capable of holding the outer periphery of the cap, and moving means for moving the pressing body to a position where the pressing body is pressed against and separated from the cap, and the cap holding means is provided in the direction of the container below. A load applying means for applying a load is provided, and the cap is fastened to the mouth of the container by rotating the cap holding means. After the mounting torque exceeds the suction force of the suction means and the cap slips, a load is applied to the cap holding means, and the moving means is actuated to press the pressing body against the outer surface of the cap so that the cap is pressed. A capping device characterized by holding and screwing.