JPH0761515B2 - Can lid winding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a can lid winding device for winding a can lid around a can container.

(Prior Art) Conventionally, when the can lid is tightened while the can container is being conveyed after the contents are filled in the can container, for example, the can container filled with the contents is conveyed by a belt conveyor. After that, the can container is covered by a disc-shaped supply turret, and the can container is covered by the turret while being guided by the turret, and then the can container is delivered to the winding turret. The can lid is wound around the can container by being pressed into contact with a winding means such as an arc-shaped seaming rail provided along the outer circumference of the turret while being rotated.

According to such an apparatus, as the turret is rotated, the conveying direction of the can container conveyed thereby changes constantly in an arc shape, and the centrifugal force acts on the contents in the can container so that the contents are separated. It is easy to overflow. Therefore, the higher the transport speed of the can container, the more the contents cannot be suppressed from overflowing,
The wrapping speed of the can lid capable of suppressing the overflow of the contents was limited to 200 to 250 pieces per minute.

For this reason, the applicant has previously proposed Japanese Patent Application No. 63-141482 to prevent the contents from overflowing when the can lid is wound around the can body and fasten the can lid at high speed. Proposed a device.

The winding device is for winding a can container filled with contents in a straight line and winding a can lid on the can container.

In the winding device, as shown in FIG. 8, the can container X is linearly conveyed by the first can container conveying means 100.

Then, the can container X is endlessly rotated into a substantially elliptical shape, and one side thereof is delivered to the second can container carrying means 101 which moves in parallel with the first can container carrying means 100.

As shown in the ninth drawing, the second can container carrying means 101 is provided with a support table 102 for rotatably supporting the can container X. Above the support table 102, the support table 1
Opposite 02, a can lid holding means 103 for holding the can lid Y is provided. The can lid holding means 103 carries the can lid Y while holding the can lid Y held by the can lid holding means 103.
Is equipped with. The can lid transfer means 104 and the support table 102 are integrally formed and are connected to a plurality of endless chains 105, and the endless chains 105 are rotated to transfer the can container X and the can lid Y at the same time.

As shown in FIGS. 8 and 9, the can container X transferred from the first can container carrying means 100 to the second can container carrying means 101.
While the second can container transporting means 101 is being carried, the can lid Y already supplied from the can lid feeder C to the can lid holding means 103 of the can lid carrying means 104 and held by suction is lifted (not shown). The can lid holding means 103 is lowered by the means to cover the opening of the can container X with the can lid Y.

Then, as shown in FIG. 9, the can container X and the can lid Y sandwiched between the can lid holding means 103 and the second can container carrying means 101 are integrally rotated by the rotation driving means to form a linear winding. Roll along the tightening means 106. The rotation driving means is provided with a pinion gear 107 on the outer periphery of the can lid holding means 103, and a rack 108 meshing with the pinion gear 107 is provided along the seaming rail 109 which is the winding and tightening means 106 in the transport direction. There is.
The second can container transporting means 101, in which the can lid Y is capped and sandwiched between the can containers X, moves the pinion gear 1 when moving linearly.
The can container X is conveyed linearly while the can container X is rotated through the can lid holding means 103 by the engagement of 07 and the rack 108. In the process, the winding portion of the can container X and the can lid Y is a winding means.
The can lid Y is wound around the can container X by being pressed against the seaming rail 109 which is 106.

According to the winding device, since the winding is performed while being linearly conveyed at a constant speed and the conveying direction of the can container X does not change, the overflow of the contents does not occur even if the canning speed of the can lid Y is increased. It can be suppressed, and canning productivity can be improved.

In the winding device, if the conveying speed is increased in order to further increase the production efficiency, the second can container conveying means 101 and the can lid conveying means 102, which are endlessly rotated in a substantially elliptical shape, have an arc shape. When the pinion gear 107 and the rack 108 start to mesh with the rack 108 when the rotation of the pinion gear 107 and the linear movement along the winding means 106 are started, the pinion gear 107 and the rack 108 suddenly start meshing with each other. At this time, the teeth of the pinion gear 107 and the teeth of the rack 108 may be damaged. If the teeth are damaged, the rotation of the can lid Y and the can container X during winding may be hindered. However, there is an inconvenience that reliable winding cannot be performed.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned inconveniences, and the present invention can wind a can lid so that the can lid and the can container can be rotated smoothly and the can lid can be fastened. The purpose is to provide a fastening device.

(Means for Solving the Problems) In order to achieve the above object, the first aspect of the present invention is
The can container is transferred to a can container conveying means which rotates on an elliptical orbit having an arcuate orbit and a linear orbit, and the can container is rotatably supported and conveyed by the can container conveying means and is opposed to above the can container conveying means. Then, the can lid is detachably held by the can lid holding means provided rotatably and vertically in the can lid carrying means that moves in synchronization with the can container carrying means, and the can lid is carried,
The can lid holding means is lowered to hold the can lid held by the can lid holding means by being crowned on the can container, and the can lid and the can container are integrally rotated by the rotation drive means in the linear orbit. In a can lid tightening device that rolls along a linear winding means and press-contacts the winding means to wind a can lid onto a can container, the rotation drive means is integrated with the can lid holding means. It comprises a pinion gear rotatably provided coaxially and a rack that meshes with the pinion gear provided on the entire circumference of the can container carrier along an elliptical orbit of the container carrier, and the can container carrier and the can lid holding device. Means that the elliptical orbit is rotated by an endless chain wound around a driving sprocket and a driven sprocket provided at positions inside the circular arc orbits at both ends of the elliptical orbit, and the rack is the elliptical orbit. Between the circular trajectory and the straight trajectory At least one set of first rack portions provided so as to be separable in the longitudinal direction of the elliptical orbit at a boundary portion and a portion other than the portion where the winding means is provided, and each of the divided first portions. A second rack which has a tooth profile continuous with the first rack part and which is provided in the gap formed between the rack parts so that the downstream side in the moving direction of the can lid holding means is a fulcrum and the upstream side is swingably returnable. And a section.

In the second aspect of the present invention, the can container is transferred to the can container conveying means that rotates on an elliptical orbit having an arcuate orbit and a linear orbit, and the can container conveying means rotatably supports and conveys the can container. At the same time, the can lid is detachably held by the can lid holding means that is rotatably and vertically movable on the can lid carrying means that faces the can container carrying means and moves in synchronization with the can container carrying means. The can lid is conveyed, the can lid holding means is lowered, and the can lid held by the can lid holding means is capped and held on the can container, and the can lid and the can container are rotated by the rotation drive means in the linear orbit. In the can lid winding device for integrally rotating and rolling along a linear winding means, the can lid is pressed against the winding means to wind the can lid onto the can container. A pinion gear rotatably provided coaxially with the can lid holding means, and the can container. A rack that meshes with the pinion gear provided on the entire circumference along the elliptical orbit of the conveying means, and the can container conveying means and the can lid holding means are inside an arcuate orbit at both ends of the elliptical orbit. The elliptical orbit is rotated by the endless chain wound around the driving sprocket and the driven sprocket provided at the position of, and the rack is a substantially boundary portion between the circular orbit and the linear orbit of the elliptical orbit. In addition, between at least one set of first rack portions provided so as to be separable in the longitudinal direction of the elliptical orbit at a portion other than the portion where the winding means is provided, and each of the divided first rack portions. A second rack portion which has a tooth profile continuous with the first rack portion and which is slidably returned from the upstream side to the downstream side in the moving direction of the can lid holding means is provided in the formed gap. And

(Operation) By such means, in the present invention, since the rack is provided over the entire circumference along the orbit along which the can lid conveying means rotates, the pinion gear integral with the can lid holding means is
It always meshes with the rack. As a result, the pinion gear of the can lid holding means does not suddenly mesh with the rack and the teeth thereof are not damaged during the process in which the can lid transport means rotates on the orbit. When the can lid holding means rotates on the track, the can lid holding means always rotates.

In this case, if the rack provided over the entire circumference of the track of the can lid carrying means is integrated, if the endless chain for rotating the can lid carrying means is loosened, the driven sprocket or It becomes difficult to move the drive sprocket to eliminate the slack in the endless chain.
Therefore, in the present invention, the rack can be divided into at least one set of first rack portions in the longitudinal direction of the elliptical orbit.
As a result, when the endless chain is loosened, the driven sprocket is moved in a direction away from the drive sprocket to eliminate the looseness of the endless chain, and the driven sprocket side is made to follow it. It becomes possible to move the first rack portion of the above-mentioned apparatus by the moving amount of the driven sprocket.

At this time, the second rack portion capable of swinging return or slide return is provided in the gap formed between the first rack portions, and the portion where the second rack portion is provided is Since it is a substantially boundary portion between the circular orbit of the elliptical orbit and the linear orbit, the pinion gear surely and smoothly meshes with each rack portion while rotating along the elliptical orbit.

More specifically, when the first rack portions are moved as described above, the width of the gap between the first rack portions changes, the tooth arrangement between the first rack portions changes, and one first rack portion moves to the other. In the process of shifting the mesh to the first rack portion, the mesh is likely to be inconsistent. Further, in general, when the pinion gear changes its traveling direction while meshing with the rack between the straight track and the arcuate track, the meshing between the pinion gear and the rack is likely to be inconsistent.

However, according to the first aspect of the present invention, each first
In the gap between the rack portions, when the teeth of the second rack portion provided in the gap and the teeth of the pinion gear do not coincide at the meshing start position, the second rack portion is fulcrumed on the downstream side thereof. As the upstream side swings away from the pinion gear, the second rack portion returns to the original position and meshes with the pinion gear when the meshing is matched, and the pinion gear is guided to the first rack portion on the downstream side. . Therefore, when the pinion gear moves between the first rack portions, the meshing between the pinion gear and each rack portion does not become inconsistent, and the pinion gears mesh smoothly.

Further, according to the second aspect of the present invention, when the meshing of the pinion gear shifts from the upstream first rack portion to the downstream first rack portion, the pinion gear first meshes with the second rack portion. To do. At this time, the pinion gear is moved along the second rack portion by the can lid transporting means, and the second rack portion is slidable in the moving direction of the pinion gear. Slides from the upstream side to the downstream side in the gap between the first rack portions while meshing with the pinion gear, and abuts on the first rack portion on the downstream side. The pinion gear rotates toward the downstream side while meshing with the second rack portion, and the second rack portion contacts the first rack portion on the downstream side, and the first rack portion on the downstream side from the second rack portion. The meshing shifts to the rack. Therefore, when the pinion gear moves between the first rack portions, the meshing between the pinion gear and each rack portion does not become misaligned, and the gears mesh smoothly and reliably. The second rack portion returns to the original position where it comes into contact with the upstream first rack portion after the pinion gear has moved downstream to the first rack portion, and meshes with the pinion gear that moves next. Prepare.

(Embodiment) Next, an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a schematic view showing an entire canning production apparatus including this embodiment, FIGS. 2 and 3 are partially enlarged plan views for explaining a part of this embodiment, and FIG. 4 is an IV of FIG. -IV sectional view, FIG. 5 is an operation explanatory view, FIG. 6 is an operation explanatory view of another embodiment, and FIG.
The figure is a perspective view for explaining FIG.

In this embodiment A, the can lid Y is double-wound onto the can container X continuously supplied from the filling device B for filling the contents into the can container X as shown in FIG.

Reference numeral 1 denotes a first can container conveying means for linearly and horizontally conveying a can container X filled with contents by a filling device B at a predetermined speed, and 2 an endless substantially elliptical shape for conveying the can container X. The second can container transporting means 3, 3 is a can lid transporting means for transporting the can lid Y provided above the second can container transporting means 2, and 4 is the can lid transporting means 3. The can-lid holding means 5 for holding the can-lid holding means 5, the rotation driving means for rotating the can-lid by rotating the can-lid holding means 4, and 6 the second can-container conveying means 2 conveys the can-container X linearly. A first winding tightening means 7 provided parallel to the forward transport direction, and a second winding tightening means 7 provided parallel to the backward transport direction in which the second can container transport means 2 transports the can container X linearly. The means is shown.

More specifically, the first can-container conveying means 1 is provided so as to extend linearly from the filling device B as shown in the first illustration so as to run in parallel with the second can-container conveying means 2. The first can container carrying means 1 holds the can container X between the claw pieces 8 and carries it in a straight line. As will be described later, when the can lid Y is tightened around the can container X, as shown by the solid line in FIG. 4, the claw piece 8 abuts on the rail 10 and moves upward to engage with the can container X. To cancel.

The first can container carrying means 1 carries the can container X by sliding it on the support plate 9 with the pawl piece 8 sandwiching the can container X. The support plate 9 has a portion 11 parallel to the first winding means 5.
In this region, the can container X is supported and conveyed by the second can container conveying means 2, as will be described later.

As shown in FIG. 4, the can lid carrying means 3 is provided with a rotatable and vertically movable can lid holding means 4 provided with a seaming chuck 12 for holding the can lid Y, and the can lid holding means 4 has an outer circumference. A rotation driving means 5 described later for rotating the can lid Y is provided.

As shown in FIG. 4, the second can container transporting means 2 includes a support table 13 on which the can container X is mounted and rotatably supported.

The can lid transfer means 3 is provided on the upper portion facing the second can container transfer means 2 by a transfer block 14 to be described later.
It is provided integrally with the can container carrying means 2.

The transport block 14 is rotatably provided such that a large number of the transport blocks 14 are connected to each other with an interval therebetween on an endless chain 15 that rotates endlessly in a substantially elliptical shape. The transfer block 14 is rotated in the same direction and at the same speed at a position parallel to the first can container transfer means 1. Then, as shown in the figure, on the side where the transfer block 15 is in parallel with the first can container transfer means 1, the transfer block 15 moves in parallel in an arc shape so that the transfer direction of the first can container transfer means 1 is a tangent line. Further, it is arranged so as to move away from the first can-container conveying means 1 in an arc shape, and the cut-out portion 11 of the support plate 9 is used to move the first can container.
It runs in parallel with the can container carrying means 1.

In FIGS. 1 and 2, 16 is a can lid supply turret for supplying the can lid Y to the can lid conveying means 3, and 17 is a device for supplying the can lid Y to the can lid supply turret 16.

The transfer block 15 has an upper horizontal portion 18 as shown in FIG.
And a lower horizontal portion 19 are integrally formed in a U-shape in a side view, and the supporting portion 20 is detachably provided on a supporting plate 21 fixed to the endless chain 15.

Further, a can lid holding means 4 is provided on the upper horizontal portion 18 of the supporting portion 20. The can lid holding means 4 is rotatably provided at the lower end of a support shaft 22 hanging from the upper horizontal part 18, and a cam roller 23 provided on the upper side part of the support shaft 22 is guided by a cam rail 24 to move up and down. Along with this, the can lid holding means 4 supported by the upper horizontal portion 18 is configured to move up and down. The can lid holding means 4 is provided with a seaming chuck 12, and the seaming chuck 12 is provided with a suction means for the can lid Y on its lower surface. The suction means transmits the suction force of a suction device (not shown) to the can lid holding means 4 via a suction duct 25 provided at the upper portion of the can lid transport means 3, and the can lid holding means 4 From the opening 26 in the center of the support shaft 22
The ventilation socket 28 communicating with the passage 27 inside is the suction duct.
It is slid on 25.

On the lower horizontal portion 19 of the supporting portion 20, there is provided a support table 13 for the can container X which functions as the second can container carrying means 2 described above. The table 13 is rotatably provided on a support shaft 29 of the can lid holding means 4 provided on the upper horizontal portion 19 and a support shaft 29 coaxial with the support shaft 22.

The transport block 14 includes a rail plate 32 and guide rails 30 and 31 vertically opposed to each other at a substantially central portion on the back side of the support portion 20.
Supported by the rail 35 having a guide groove in a pair of guide rollers 33, 34 provided on the upper back surface side of the upper and lower horizontal portions 18, and a guide groove in a guide roller 36 provided in the lower horizontal portion 19. It is supported by rails 37.

Each of the transport blocks 14 has a corresponding support portion 20 as shown in FIG.
Equipped with an endless chain 15 whose lower rear part is connected to each other,
The endless chain 15 is wound around a driving sprocket 38 and a driven sprocket 39 shown in FIGS. 2 and 3.
A drive device (not shown) drives the drive sprocket to rotate the endless chain 15.

Each transport block 14 is guided along a rail plate 32 and similar rails 35, 37 that are connected to each other, as shown in FIGS. The rail plate 32 causes each of the transport blocks 14 to approach each other in an arc shape so that the transport direction of the first can container transport means 1 is a tangent line as described above in the forward path, and is further linear at the cutout portion 11 of the support plate 9. First to move in the shape of
The container is conveyed parallel to the can container conveying means 1, then is guided away from the first can container conveying means 1 in an arc shape, is further linearly guided in the return path, and is guided in an arc shape in the forward path.

The cam rail 24 is at a position where the cam roller 23 of the transport block 14 moves as shown in FIGS. 2 to 4, and is integrated in parallel on the first winding means 6 and the second winding means 7, respectively. It is provided in. The cam rail 24 guides the cam roller 23 in the carrying direction of the carrying block 14, and also guides the up-and-down movement of the seaming chuck 12 via the support shaft 22 provided with the cam roller 23.

As shown in FIG. 2, the suction duct 30 is provided above the ventilation socket 28 of each of the transfer blocks 14 along the moving position thereof, and has a plurality of circular holes 40 provided at intervals on the lower surface thereof for ventilation. It is provided so as to be connectable to the socket 23.

The first winding means 6 is linearly provided at a position where the transport block 14 runs side by side along the rail plate 32 at the cutout portion 11 of the support plate 9 as shown in FIG. . As shown in FIGS. 2 to 4, the first winding means 6 has a can lid Y on the flange portion of the can container X on the outward path where the can container X is linearly conveyed by the second can container conveying means 2. A first winding group 41 and a second winding group 42 for winding and tightening the end hook portion of the above are linearly connected and provided.

The second winding means 7 is, as shown in FIGS. 2 and 3,
The can container X is linearly provided with a third winding group 43 on the return path where the can container X is linearly conveyed by the second can container conveying means 2.

The seaming chuck 12 of the can lid holding means 4 rotates the can container X and the can lid Y so that the flange portion and the end hook portion of the can container X and the can lid Y are rotated by the first tightening means 6 as shown in FIG. It rolls while being pressed against the second winding means 7. At this time,
Since the can container X and the can lid Y are always rotationally driven by the rotational driving means 5 described later, smooth winding can be performed.

The rotation driving means 5 includes a pinion gear 44 and the pinion gear 44.
It is composed of two first rack portions 45 and two second rack portions 46 that mesh with each other. In detail, as shown in FIG. 4, a pinion gear 44 is provided around the entire outer periphery of the seaming chuck 13 and, as shown in FIG. 2 and FIG. A first rack portion 45 with which the pinion gear 44 meshes is provided on the entire circumference along the orbit. The first rack portion 45 is divided by a linear portion except the position where the winding means is provided. As shown in FIG. 5, the first rack portion 45 is connected to the gap by a connecting piece 47, and a bolt 48 is loosened to slide a slide hole 49 formed in the connecting piece 47. Move the first rack portion 45 on the driven sprocket 39 side. When the second can container transporting means 2 is connected to the endless chain 15 wound around the driving sprocket 38 and the driven sprocket 39 as in the present embodiment, it is generally the endless chain.
When applying tension to 15, the driven sprocket 39 is moved in a direction away from the driving sprocket 38. At that time, since the first rack portion 45 is divided, the first sprocket 39 side first
By moving the rack portion 45 by the same amount as the movement amount of the driven sprocket 39, the first rack portion 45 is moved to the endless chain 15
The tension can be easily applied to the endless chain 15 without the trouble of exchanging it in accordance with the above.

As shown in FIG. 5, the second rack portion 46 is provided by connecting the gaps between the first rack portions 45. The second rack portion 46 has a tooth shape that is continuous with the first rack portion 45, and can mesh with the pinion gear 44. Further, the second rack portion 46 is swingably supported by a hinge 50 on the downstream side in the moving direction of the can lid holding means 4, and is biased inward by a spring plunger 51. As a result, the second rack portion 46 is locked by the locking portion 52, and is normally in a state where the first rack portions 45 are continuously connected to the first rack portions 45.

Therefore, as shown in FIGS. 4 and 5, when the transport blocks 14 move along the first winding means 6 and the second winding means 7, the pinion gears 44 move to the first rack portion 45. The meshing meshes with each other to rotate constantly, and the seaming chuck 12 and the support table 13 are driven to rotate. When the seaming chuck 12 and the support table 14 rotate, the can lid Y sandwiched between them.
And the can container X is rotated.

The operation of the apparatus A of the present embodiment having the above configuration will be described below.

After the contents of the can container X are filled by the filling device B, the first container
As shown in the figure, the claw pieces 8 of the first can container carrying means 1 are sandwiched between the front and rear sides in the carrying direction, and linearly slid and carried on the support plate 9.

On the other hand, the can lid Y is supplied from the can lid feeding device 17, and the can lid feeding turret 16 allows the can lid feeding means 3 of each feeding block 14.
Is supplied to. At the delivery position of the supplied can lid Y,
As shown in FIG. 4, the can lid holding means 4 sucks and holds. At this time, the can lid holding means 4 always rotates due to the meshing of the pinion gear 44 and the first rack portion 45.

Conveying block 14 in which the can lid Y is held by the can lid holding means 4.
Is subsequently rotated by the endless chain 15 that rotates in a substantially elliptical shape. Further, as shown in FIGS. 2 and 4, the transfer block 14 is gradually approached to the first can container transfer means 1 by the endless chain 15 and is moved to a position parallel thereto. At this time, the can container X conveyed by the first can container conveying means 1 is locked by the pair of claw pieces 8 from the front and rear in the conveying direction, and at the position of the cut portion 11 of the supporting plate 9, the second can container conveying means 1 is formed. 2 is transferred to the support table 13. Then, the can container X is placed on the support table 13 while being locked by the claw piece 8. The can container X has a first
Even if there is a speed difference between the can container carrying means 1 and the second can container carrying means 2, they are accurately placed at the center of the support table 13. Then, when it is reliably delivered to the second can container carrying means 2,
As shown in FIG. 4, the claw piece 9 abuts on the rail 10 and moves upward to release the lock of the can container X.

When the can container X is thus transferred to the second can container carrying means 2, the rotating can lid holding means 4 of the can lid carrying means 3 is lowered by the cam rail 24 via the cam roller 23. Then, the can lid Y held by the can lid holding means 4 is put on the can container X on the support table 13.

Further, when the transport block 14 transports and rotates the can lid Y and the can container X, the seaming chuck 12 of the can lid holding means 4 and the support table 14 of the second can container transport means 2 synchronize with the transport speed. The can lid Y and the can container X are rotated to rotate. Then, in the outward path of the second can-container conveying means 2, the can lid Y and the can container X are conveyed in a straight line while being rotated, and at the same time, the end hook portion of the can lid Y is the winding groove 41 of the first winding means 6. And 42
It rolls while being pressed against and is tightened by it.

Subsequently, the pinion gear 44 of the can lid holding means 4 meshes with the first rack portion 45 on the upstream side and meshes with the second rack portion 46, and is further rotationally driven to move to the first rack portion 45 on the downstream side. At this time, if the pinion gear 44 and the second rack portion 46 do not match at the meshing start position, the pinion gear 44
The second rack portion 46 is repelled by the teeth of, and the upstream side swings around the hinge 50 on the downstream side of the second rack portion 46 as a fulcrum, and the second rack portion 46 is once separated from the pinion gear 44. Then, at the moment when the teeth of the second rack portion 46 and the teeth of the pinion gear 44 coincide with each other, the spring plunger 51 urges them to return to the position where the first rack portion 45 is connected, and at the same time, the teeth of the second rack portion 46. And pinion gear 44
Mesh with the teeth of. In this way, the pinion gear 44 and the rack portions 45 and 46 are always in mesh with each other, and the can lid can be smoothly rotated.

Then, the transport block 14 changes its direction and moves to an arcuate path, and the pinion gear 44 moves to a linear path on the return path while being rotationally driven from the first rack section 45 through the second rack section 46. Also at this time, as described above, when the pinion gear 44 and the second rack portion 46 do not coincide at the meshing start position, the second rack portion 46 swings on the upstream side with the hinge 50 on the downstream side as a fulcrum. The meshing is performed while moving and moving away from the pinion gear 44.

After that, the can container X and the can lid Y are sandwiched between the can lid holding means 4 and the support table 13 and are linearly conveyed by the conveying block 14 while being simultaneously rotated in the same manner as described above while being second-rolled. By rolling while being pressed against the third winding groove 43 of the means 7, the can lid Y is double-wound on the can container X.

After that, the can container X whose winding of the can lid Y is completed is carried out from the carry-out path 54 by the carry-out turret 53.

Further, as shown in FIG. 6 and FIG. 7, in the gap between the first rack portions 45, the slide return is freely possible from the upstream side to the downstream side in the moving direction of the can lid holding means 4 via the bearing 55. The second rack 56 may be provided. As shown in FIG. 6, the second rack 56 is always urged by the spring plunger 57 on the upstream side in the moving direction of the can lid holding means 4 so as to always be in the first position.
It is in contact with the rack portion 45. As a result, normally, the first rack portions 46 are continuously connected to the first rack portions 46. In this state, when the pinion gear 44 of the can lid holding means 4 moves along the second rack portion 56, the pinion gear 44 and the second rack portion 56 mesh with each other, so that the pinion gear 44 rotates. The process moves to the second rack section 56. The second rack portion 56 has the bearing 55 as described above.
It is slidable through and is not fixed. Therefore, when the pinion gear 44 is in a state of meshing with the second rack portion 56, the second rack portion 56 meshing with the pinion gear 44 moved according to the can lid transporting means 3 moves the pinion gear 44. And slides in the gap of the first rack portion 45. When the second rack portion 56 is brought into contact with the downstream first rack portion 45, the pinion gear 44 moves to the downstream first rack portion 45 while rotating. Then, when the pinion gear 44 separates from the second rack portion 56,
The rack portion 56 is returned to the original position where it abuts on the upstream first rack portion 45 by the bias of the spring plunger 57.

In this way, the pinion gear 44 and the rack portions 45 and 56 always mesh with each other, and the can lid can be smoothly rotated.

(Effects of the Invention) As is apparent from the above, the present invention provides the rack all around the orbit around which the can lid conveying means rotates, and the pinion gear integrated with the can lid holding means is provided in the rack. Since the pinion gear and the rack are not meshed abruptly and their teeth are not damaged because the pinion gear and the rack are smoothly rotated while being constantly meshed with the can lid, Also, the transport speed of the can container can be increased.

Further, according to the present invention, when the driven sprocket is moved away from the driving sprocket to apply tension to the endless chain to eliminate slack, the rack is at least separable in the longitudinal direction of the track. Set of 1st
Since it is divided into rack portions, the first rack portion can be moved together with the driven sprocket, so that the slack of the endless chain can be easily performed without replacing the rack provided on the entire circumference of the track. Can be resolved.

Then, as described above, the division position of the first rack portion for eliminating the slack of the endless chain is set to the boundary portion between the circular arc trajectory and the linear trajectory of the elliptical trajectory, and between the divided first rack portions. Since the first rack portion is connected by providing the second rack portion which can freely swing and return or slidably return in the gap formed by the pinion gear, the pinion gear is located upstream of the linear orbit and the circular orbit. When moving from the first rack portion to the first rack portion on the downstream side, the pinion gear can be smoothly rotationally driven while ensuring the meshing between the pinion gear and each rack portion. That is, in the first aspect of the present invention, since the second rack portion can swing away from the pinion gear by swinging the upstream side with the downstream side as a fulcrum, it can be separated from the teeth of the second rack portion and the pinion gear. Even if the teeth of the two do not coincide with each other at the meshing start position, the swinging of the second rack portion enables quick and smooth meshing of the two rack portions. The meshing of the pinion gear to the downstream first rack portion can be smoothly and reliably transferred.

Further, in the second aspect of the present invention, when the pinion gear moves from the first rack portion on the upstream side to the second rack portion on the downstream side, the second rack portion that can be slidably returned is the pinion gear. By sliding through the gap between the first rack portions from the upstream side to the downstream side while meshing with the first rack portion on the upstream side to shift the meshing of the pinion gear from the first rack portion on the downstream side to the first rack portion on the downstream side. It can be performed smoothly and reliably.

From the above, according to the present invention, even if the driven sprocket is moved in the direction away from the driving sprocket in order to apply tension to the endless chain and eliminate slack, the first rack portion Since the pinion gears can be easily moved, and the pinion gears are rotationally driven by reliable engagement with each rack portion, the transport speed of the can lid and the can container at the time of winding the can lid can be increased. It is possible to provide a can lid winding device that can be used.

[Brief description of drawings]

FIG. 1 is a schematic view showing an entire canning production apparatus including this embodiment, FIGS. 2 and 3 are partially enlarged plan views for explaining a part of this embodiment, and FIG. 4 is an IV of FIG. -IV sectional view, FIG. 5 is an operation explanatory view, FIG. 6 is an operation explanatory view of another embodiment, and FIG.
6 is a perspective view for explaining FIG. 6, FIG. 8 is a schematic view showing a conventional device, and FIG. 9 is a sectional view taken along line IX-IX in FIG. X ... can container, Y ... can lid, 2 ... can container conveying means, 3 ... can lid conveying means, 4 ... can lid holding means, 5 ... rotation driving means, 38 ... driving sprocket 39 ...... Driven sprocket 44 …… Pinion gear, 45 …… First rack section 46,56 …… Second rack section

Claims (2)

[Claims] 1. A can container transporting means for transferring a can container to a can container carrier which rotates an elliptical orbit having an arcuate orbit and a linear track, and rotatably supporting and carrying the can container to the can container carrier, and carrying the can container. The can lid is detachably held by the can lid holding means that is rotatably and vertically movable on the can lid carrying means that is opposed to above the means and moves in synchronization with the can container carrying means to carry the can lid. , The can lid holding means is lowered, the can lid held by the can lid holding means is capped and held on the can container, and the can lid and the can container are integrally rotated by the rotation drive means in the linear orbit. In the can lid winding device, which rolls along a linear winding means and presses against the winding means to wind the can lid around the can container, the rotation drive means is integral with the can lid holding means. And a pinion gear rotatably provided coaxially with the ellipse of the can container transporting means. A rack that meshes with the pinion gear provided on the entire circumference along the road, and the can container transporting means and the can lid holding means are provided at positions inside the circular arc orbits at both ends of the elliptical orbit. The elliptical orbit is rotated by the endless chain wound around the driven sprocket and the driven sprocket, and the rack is substantially at the boundary between the circular orbit of the elliptical orbit and the straight line and At least one set of first rack portions provided so as to be separable in the longitudinal direction of the elliptical orbit at a portion other than the portion where the means is provided, and a gap formed between each of the divided first rack portions. And a second rack portion having a tooth profile continuous with the first rack portion and having an upstream side swingably returnable with a downstream side in the moving direction of the can lid holding means as a fulcrum. Can lid winding device. 2. A can container conveying means for rotating and rotating an elliptical orbit having an arcuate orbit and a linear orbit for conveying and supporting the can container rotatably by the can container conveying means and conveying the can container. The can lid is detachably held by the can lid holding means that is rotatably and vertically movable on the can lid carrying means that is opposed to above the means and moves in synchronization with the can container carrying means to carry the can lid. , The can lid holding means is lowered, the can lid held by the can lid holding means is capped and held on the can container, and the can lid and the can container are integrally rotated by the rotation drive means in the linear orbit. In the can lid winding device, which rolls along a linear winding means and presses against the winding means to wind the can lid around the can container, the rotation drive means is integral with the can lid holding means. And a pinion gear rotatably provided coaxially with the ellipse of the can container transporting means. A rack that meshes with the pinion gear provided on the entire circumference along the road, and the can container transporting means and the can lid holding means are provided at positions inside the circular arc orbits at both ends of the elliptical orbit. The elliptical orbit is rotated by the endless chain wound around the driven sprocket and the driven sprocket, and the rack is substantially at the boundary between the circular orbit of the elliptical orbit and the straight line and At least one set of first rack portions provided so as to be separable in the longitudinal direction of the elliptical orbit at a portion other than the portion where the means is provided, and a gap formed between each of the divided first rack portions. And a second rack portion having a tooth profile continuous with the first rack portion and slidably returned from the upstream side to the downstream side in the moving direction of the can lid holding means. Winding device.