JPH0643036Y2 - Plug screwing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a device for automatically screwing a plug having a male screw into a mouthpiece having a female screw provided at the upper end of a drum or other container that moves intermittently. .

[Conventional technology]

Conventionally, various devices have been provided for automatically attaching a cap or the like to a mouthpiece of a small container such as a bottle. However, there is not yet provided a device for automatically screwing a plug having a male thread into a mouthpiece having a female thread provided in a large container such as a drum can.

An object of the present invention is to provide a device for automatically screwing a plug having a male screw into a mouth tube having a female screw provided in a large container as described above.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention has a conveying means for intermittently transferring a container provided with a mouth tube having a female screw at an upper end at a predetermined interval, and a mouth tube of the container sandwiched from the left and right, and temporarily tightening the mouth tube. Section and a positioning member positioned at a fixed position immediately below the main plug tightening part, and the plug supplied from the plug supply means is moved to the above-mentioned temporary tightening part just above the mouth tube stopped at the fixed position. Directly above the plug supply plate and the mouthpiece in a fixed position, the plug supply plate moves down under the condition that the plug is moved to just above the mouthpiece, and the lower end of the plug grips the grip with a plurality of elastic chuck claws. Then, the plug supply plate descends again under the condition that the plug supply plate retreats to the original standby position and rotates, and the plug grasped by the chuck claws is screwed into the female screw of the mouth cylinder, and then the plug is left and the plug rotates. A device is installed and Under the condition that the mouthpiece with the plug temporarily tightened at the temporary plug tightening part stops at a fixed position, it descends on the plug while rotating, and the screwdriver at the lower end of the plug strongly screw in the plug and then raises it. A plug screwing device provided with a shaft is provided.

[Action]

Since this invention has the above-mentioned structure, when the container sent by the conveying means stops at the plug temporary tightening portion, the left and right positioning members hold the mouth tube on the container and hold it at an accurate position.

Then, when the plug supply plate moves the plug to a position just above the mouth tube and stops, the plug rotating device above it descends and grasps the plug with the chuck claws at its lower end and ascends. Return to the original standby position.

Under the condition that the plug supply plate has returned to the original standby position, the plug rotating device again descends and rotates, and the plug grasped by the chuck claws is screwed into the mouth tube and temporarily tightened, and then the plug is raised and left.

After that, the left and right positioning members are opened, and the conveying means works to send the container to the next plug main tightening portion.

When the container stops at the full tightening portion, the left and right positioning members approach each other, and hold the mouthpiece in the correct position.

Next, the drive shaft immediately above the drive shaft rotates and descends, and the driver at the lower end engages with the engaging portion of the plug to fully tighten the plug and then ascends.

After that, the left and right positioning members are opened, and the carrying means carries out the container.

〔Example〕

The drawings show an embodiment of the invention. In FIGS. 1 and 2, 1 is a frame, and 2 is a conveying means provided in the lower part of the frame.

The carrying means 2 is composed of a pair of left and right endless carry-out chains 4 that move along the guide rails 3, and the folded-back portions at both ends of both chains 4 are rotary shafts 5 attached to both ends of the frame 1.
6 are engaged with sprockets 7 and 8 at both ends.

11 is a drive device including a motor and a speed reducer.
The output shaft 11 and the rotary shaft 5 are interlocked with each other by the conduction belt 12, and the left and right chains 4 are intermittently driven.

Reference numeral 13 in FIG. 1 denotes a plurality of lifts arranged in the lower part of the frame 1 between the left and right chains 4 at regular intervals. Each lift 13 is a drive cylinder operated by hydraulic pressure or pneumatic pressure.
Move up and down by 14.

Reference numeral 15 denotes a plurality of rotating shafts which are rotatably supported at fixed intervals by bearings provided on the upper and lower sides of the frame 1, and the left and right shafts 15 facing each other are opposed to each other by a link mechanism 16 shown in FIG. Interlock so as to rotate at an equal angle in the direction.

An inwardly facing arm 17 is fixed to an intermediate portion of each shaft 15, and a positioning roller 18 is attached to an inner end of the arm 17 so that the left and right rollers 18 approach or separate by the rotation of the left and right shafts 15. Constitute.

Reference numeral 20 is a drive cylinder for each of the rotating shafts 15, which is operated by hydraulic pressure or pneumatic pressure. This cylinder 20 is frame 1
Rotatably attached to one side of the
It is connected to an arm provided in a part of.

In the mechanism described above, when the left and right positioning rollers 18 are open, the drum can 21 supplied onto the conveying means 2 from the right side of FIGS. 1 and 2 passes between the rollers 18, but the cylinder 20 When the distance between the rollers 18 is narrowed by, the drum can 21 is stopped by the right and left rollers 18.

When the drum can 21 is conveyed in the direction of the arrow in FIG. 1 by the conveying means 2 as described above and the positioning rollers 18 are opened and closed, the drum can 21 is transferred to the respective elevators 13 and temporarily stopped there.

As described above, the cylinder 14 operates under the condition that the drum can 21 is temporarily stopped on the lift base 13, and the lift base 13 is lifted to move the drum can 21.
To a certain height.

Reference numeral 22 denotes a flanged guide roller mounted by an appropriate mounting means at a portion located above each lifting table 13, and an edge 23 of the upper end outer periphery of the drum can 21 raised as described above is a third
As shown in FIG. 4 and FIG. 4, the outer peripheral side of each guide roller 22 is brought into contact with or very close to and guided by the flange of each roller 22.

A in FIGS. 1 to 4 is a temporary plug tightening portion, details of which are shown in FIGS. 3 to 9.

Reference numeral 24 in FIGS. 3 and 4 denotes a support plate fixed on the frame 1, and the roller 22 is fixed on the frame 1 and attached to a support member 25 on the support plate 24 and its sides.

A pair of left and right positioning members 26 are provided below the support plate 24.

The both members 26 are slidably mounted on a pair of guide rails 27 provided at the lower front and rear of the support plate 24.

A pinion gear 28 concentric with the drum can 21 is rotatably attached to the lower portion of the support plate 24, and rack gears 29 fixed to the both members 26 are meshed in front of and behind the pinion gear 28 to form left and right members. The structure is such that 26 simultaneously approaches or separates, and both members 26 are always equidistant from the center of the drum can 21.

Further, one rack gear 29 is driven by a hydraulically or pneumatically driven drive cylinder 30.

31 is a large-diameter mouth tube provided on the top plate of the drum can 21, 32 is a small-diameter mouth tube, and positioning notches 33 for the mouth tubes 31 and 32 are provided near both ends of the positioning members 26 on opposite sides. , 34 are provided.

Reference numeral 38 denotes a pair of guide rails provided on the frame 1. A plug supply plate 39 is placed on the rail 38, and a drive cylinder 40 for moving the supply plate 39 back and forth along the rail 38 is provided at the end of the rail 38. The cylinder 40 is operated by hydraulic pressure or pneumatic pressure.

Reference numeral 41 denotes a belt conveyor for supplying a large-diameter plug 37, which has guide plates on both sides thereof, and 43 in FIG. 2 is a means for supplying plugs onto the conveyor 41, and a plurality of plugs 37 are conveyed one by one by vibration or the like. Supply up.

45 is a road that guides the plug 37 on the conveyor 41 to the plug receiving portion 46 on the plug supply plate 39, and has guide walls on the left and right, and the passage 45 is provided on one side of the plug receiving portion 46 on the supply plate 39. A recess 44 on the same surface is provided.

Reference numeral 48 designates a receiving portion 46 via a passage 45 through a plug 37 at the top of the conveyor 41.
An extruding member that extrudes into and is operated by a hydraulic or pneumatic actuated drive cylinder 49.

5 to 9 show the details of the plug rotating device 51, which is mounted on the bracket 52 on the frame 1 shown in FIG.
It is driven by a motor 54 that moves up and down by 53.

That is, the rotary cylinder 56 is attached to the lower end of the rotary shaft 55 below the motor 54.
Is fixed, and the chuck cylinder 57 is attached to the outside of this rotary cylinder.

The chuck cylinder 57 has a plurality of elastic chuck pieces 60 divided from the lower end by a plurality of splits in the lower part of the thick upper annular portion, and the chuck claws are provided at the lower end of each piece 60.
Has 61.

Further, a vertically elongated hole 62 is provided in a part of the annular portion, and a detent piece 63 having a rotary cylinder 56 fixed thereto is engaged with the elongated hole 62.

Further, a spring receiver 64 that can be raised and lowered is provided in the lower portion of the rotary cylinder 56.
And a spring 65 for pressing the lower end of the spring receiver 64 onto the chuck claws 61.

The drum can 21 conveyed from the above-mentioned conveying means 2 is stopped by a signal from some detector at the lower part of the plug temporary tightening portion A, and the edge 23 of the drum can 21 contacts the guide roller 22.
Under the condition that the large and small mouth tubes 31 and 32 on the drum can 21 enter between the open left and right positioning members 26, the cylinder 30
The left and right members 26 approach each other due to the action of the rack gear 29 and the pinion gear 28 at the positions shown in FIG. 3, and the respective positioning notches 33, 34 sandwich the respective mouth cylinders 31, 32, and are arranged as shown in FIG. To the correct position.

At this time, the mouth tube 31 is directly below the plug rotating device 51 as shown in FIG.

Further, under the condition that the plug supply plate 39 is at the position shown in FIG. 3 and the recess 44 faces the passage 45, the cylinder 49 works and the pushing member 48 is stopped by the stopper on the belt 41. Is pushed onto the passage 45, dropped into the receiving portion 46 through the recess 44, and then retracted to the original position.

As described above, the cylinder 40 operates under the condition that the pushing member 48 supplies the plug 37 to the receiving portion 46 and retracts, and as shown in FIGS. 4 and 5, the plug 37 received by the receiving portion 46 is the mouth tube. 31 Move up.

Next, as shown in FIG. 5, the cylinder 53 of the plug rotating device 51 located directly above the mouth tube 31 works to lower the device 51, and the chuck claw 61 at the lower end grasps the outside of the plug 37 by its elasticity. Then, it rises as shown in FIG.

When the rotating device 51 holding the plug 37 rises, the cylinder
40 operates to return the supply plate 39 to the original standby position, and then the rotating device 51 descends again to apply the plug 37 to the upper end of the mouth tube 31, and the rotating device 51 starts rotating by the motor 54. As shown in FIG. 8, the male screw on the outer periphery of the plug 37 grasped by the chuck claw 61 is screwed into the female screw in the mouth tube 31.

During this time, the next plug 37 is supplied to the receiving portion 46 of the supply plate 39 in the standby position.

As described above, the rotating device 51 is raised by the cylinder 53 under the condition that the plug 37 is screwed into the mouth tube 31 and is in the temporarily tightened state. At this time, the chuck claw 61 rises while leaving the plug 37.

After that, the left and right positioning members 26 and the left and right positioning rollers 18 are opened, and the conveying means 2 moves to send the drum can 21 to the next final tightening portion C.

In the above description, the temporary tightening portion A of the large-diameter plug 37 is described, but the temporary tightening portion B of the small-diameter plug 67 on the right side of FIG.

Therefore, in the case of the apparatus shown in FIGS. 1 and 2, first, the small diameter mouth tube 32 is positioned in the temporary tightening portion B, and the plug supply means 68 is provided.
After temporarily tightening the small-diameter plug 67 sent from the mouth tube 32, the drum 21 moves to the temporary tightening portion A to temporarily tighten the large-diameter plug 37.

Therefore, the plugs 37, 32 are already attached to the mouth cylinders 31, 32 on the drum can 21 which have come to the plug main tightening part C of FIGS. 1 and 2 through the temporary tightening part A.
67 is temporarily tightened.

10 and 11 and 11 and 11 show the details of the final tightening portion C, and 70 is a support plate fixed on the frame 1.

A pair of left and right positioning members 26 for positioning with the mouth tubes 31 and 32 sandwiched therebetween are also provided in the lower portion of the support plate 70, but the configuration and operation thereof are the same as those of the temporary plug tightening portion A, and the description thereof will be omitted.

In FIG. 10I, 71 is a vertical mounting plate fixed on a support plate 70, and a hydraulic or pneumatic operation drive cylinder 72 is fixed to the upper end of the vertical mounting plate, and below the piston rod 73 protruding below the cylinder 72. Vertical drive shaft via joint / shock absorber 74
Connect 75.

The shock absorber 74 is mounted inside a cylindrical body 66 fixed to the lower end of the shaft 73 via a bearing 69 so that the upper end of the drive shaft 75 is rotatable and can be raised and lowered within a certain range, and the drive shaft 75 is pushed. It was pushed down by a spring 79.

Reference numeral 76 is a gear case fixed to the bottom of the mounting plate 71. The drive shaft 75 passes through the case 76 rotatably and vertically, and a horizontal driver as shown in FIG.
77 are integrated.

Further, the support plate 70 is provided with an opening 78 located on the positioned small diameter mouth tube 32, and the drive shaft 75 is positioned to be fitted into the opening 78.

In the gear case 76, the drive shaft 75 is rotatably mounted with a worm wheel 80 slidably passing through a central hole.
The slide key fixed to the center hole of the worm wheel 80 is engaged with the key groove 81 of the drive shaft 75 so that the rotation of the worm wheel 80 can be transmitted to the shaft 75 regardless of the position of the drive shaft 75.

A worm gear 82 is meshed with the worm wheel 80,
The shaft 83 of the gear 82 is driven by a pulley 85 via a clutch 84 provided outside the case 76.

Also in the case of FIG. 11I, a hydraulic or pneumatically operated drive cylinder 89 is fixed to the upper end of the mounting plate 88 on the support plate 70, and the joint / buffer is attached to the lower end of the piston rod 90 protruding from the lower part of the cylinder 89. The vertical drive shaft 92 is connected via the same joint-combining shock absorber 91 as the device 74.

Reference numeral 93 is a gear case fixed to the lower portion of the mounting plate 88. The drive shaft 92 is rotatably and vertically pierced through the case 93, and a horizontal driver as shown in FIG.
94 are integrally provided, and downward projections 95 are provided at both ends thereof.

Further, the support plate 70 is provided with an opening 96 located on the positioned large-diameter mouth tube 31, and the drive shaft 92 is positioned to be fitted into the opening 96.

In the gear case 93, the drive shaft 92 is rotatably mounted with a worm wheel 97 that slidably passes through a center hole.
The slide key fixed to the center hole of the worm wheel 97 is engaged with the key groove 98 of the drive shaft 92 so that the rotation of the worm wheel 97 can be transmitted to the shaft 92 regardless of the position of the drive shaft 92.

A worm gear 99 is meshed with the worm wheel 97,
A shaft 100 of the gear 99 is driven by a pulley 102 via a clutch 101 provided outside the case 93.

A motor 103 fixed on the support plate 70 drives the pulley 102 via a transmission belt.

Now, the drum can 21, in which the plugs 37 and 67 are temporarily fastened to the large and small mouth tubes 31 and 32, stops at the lower portion of the support plate 70 and is positioned by the positioning member 26, and as shown in FIGS. 10 and 11 respectively. Drive shaft 7
Cylinders 72 and 89 act under the condition of stopping immediately below 5 and 92, and drive shafts 75 and 92 start to descend, and at the same time clutch 8
The rotation of the pulleys 85 and 102 that are already rotating is transmitted to the shafts 83 and 100, the worm gears 82 and 99 rotate, the worm wheels 80 and 97 rotate, and the respective drive shafts 75 and 92 are connected. Start spinning.

The lowered drive shafts 75 and 92 are lightly buffered by the compression of the springs in the shock absorbers 74 and 91, and are lightly attached to the plugs 67 and 37 by the driver 77,
While descending while contacting the protrusion 95, the driver 77, the protrusion 95 engages with the engaging portions of the plugs 67, 37, and at the same time, the respective plugs 67,
Screw in 37 and tighten completely.

During this final tightening, each plug 6 is detected by detecting the pressure of each drive cylinder 72, 89 and torque of each drive shaft 75, 92.
When the completion of tightening 7, 7 is detected, cylinder 7
The action of 2, 89 raises the drive shafts 75, 92, and the clutches 84, 1
Turn 01 to stop the rotation of drive shafts 75 and 92.

Each of the clutches 84 and 101 is an air clutch, and the drive shaft 7
It is safe to slip on 5 and 92 when a certain torque is applied.

After that, the left and right positioning rollers 18 are opened, and the transporting means 2 starts traveling to carry out the drum can 21.

The detection of each condition in the operation of each of the above parts is performed by using a limit switch, a photoelectric detector, a timer and the like.

[Effect of device]

As described above, according to the present invention, since the mouth tube of the container conveyed by the conveying means and stopped at the fixed position is sandwiched by the left and right positioning members, the positioning is simple and accurate, and the container is supplied from the plug supplying means. The plug is temporarily tightened by grasping it with the chuck claw of the plug rotating device at the plug temporary tightening part and screwing it into the mouth tube to temporarily tighten the part. Therefore, there is an effect that the plug mounting and the final tightening can be performed extremely efficiently without requiring human labor.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a plan view of the same as above, FIGS. 3 and 4 are partially cutaway enlarged plan views showing respective states of a temporary tightening portion, and FIG. 9 to FIG. 9 are partially enlarged vertical front views showing a temporary fastening process, and FIGS. 10 and 10 are partially vertically enlarged side views showing a main fastening portion of a small-diameter plug. 11 FIGS. I and II are a partially longitudinal enlarged front view showing a main tightening portion of a large-diameter plug and an enlarged bottom view of the same drive shaft. A, B: Plug temporary tightening part, C: Plug main tightening part, 2 ... Conveying means, 21 ... Drum can, 26 ... Positioning member, 31, 32 ... Mouth tube, 37, 67 ... Plug, 39 …… Plug supply plate, 43,68 …… Plug supply means, 51 …… Plug rotation device, 61 …… Chuck claw, 74,91 …… Coupling and shock absorber, 75,92 …… Drive shaft, 77,94 ……driver.

Claims (1)

[Scope of utility model registration request] 1. A conveying means for intermittently transferring a container having a mouth tube having a female screw at an upper end at predetermined intervals, and a mouth tube of the container sandwiching the mouth tube from the left and right. A positioning member that is positioned at a fixed position directly below, and the temporary tightening portion that moves the plug supplied from the plug supply means to a position immediately above the mouthpiece stopped at the fixed position; Directly above the mouth tube at the position, the plug supply plate moves down under the condition that the plug is moved directly above the mouth tube, and the lower end of the plug grips the plug with a plurality of elastic chuck claws to move up. Under the condition that the plate retreats to the original standby position, it descends again and rotates, and the plug held by the chuck claws is screwed into the female screw of the mouth cylinder, and then the plug rotation device that raises the plug is provided. Part is temporarily tightened with the plug temporary tightening part In conditions mouth tube with a plug is stopped at a predetermined position, lowered onto the plug while rotating, plug screwing device provided with a buffer device with a drive shaft that rises after screwed strongly plug at its lower end of the driver.