JP2796536B2 - Container bottom crimping device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging machine for producing a paper container filled with contents such as a flowable food, and to flatten a container bottom of a rectangular cylindrical container material as much as possible. To a crimping device for crimping the folded end.

2. Description of the Related Art As an apparatus of this type, a mandrel stopped at a crimping station is pressed through a flatly folded end which is fitted over the mandrel and serves as a container bottom of a rectangular cylindrical container material. A crimping member movable in the axial direction of the mandrel, and a moving means for moving the crimping member in the axial direction of the mandrel, the moving means being a reversible drive shaft and a reversible rotational movement of the drive shaft. And a rack-and-pinion mechanism for converting the reciprocating linear motion into a reciprocating linear motion and transmitting the reciprocating linear motion to a crimping member.

Problems to be Solved by the Invention In the above-mentioned conventional apparatus, it is necessary to replace components in order to change the moving amount and the crimping force of the crimping member, and the change is not easy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a container bottom crimping device that can easily change the moving amount and crimping force of a crimping member.

Means for Solving the Problems A container bottom crimping device according to the present invention is flatly folded on a tip surface of a mandrel stopped at a crimping station so as to be fitted over the mandrel and become a container bottom of a rectangular cylindrical container material. In a container bottom crimping device having a crimping member movable in the axial direction of the mandrel pressed through the end portion, a fixing member disposed on an extension of the mandrel axis, and a fixing member disposed on the mandrel axial direction in the direction of the mandrel. A movable member movably supported, stopping means for stopping the movable member at a required position, and, of the first and second links having one ends connected to each other, the other end of the first link is connected to the movable member. And a toggle link mechanism in which the other end of the second link is connected to the crimping member.

In the container bottom crimping device according to the present invention, if the position of the movable member with respect to the fixed member is changed, the operation angle of the two links is changed, and as a result, the movement amount and the crimping force of the crimping member are changed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows one of the mandrels 11 and the mandrel 11
And the container bottom crimping device 12 arranged on the axis extension of FIG.

Referring to FIG. 2, the number of mandrels 11 is six.
The six mandrels 11 are provided radially on the intermittently driven horizontal rotating body 21 and sequentially arranged at the supply station I, the primary heating station II, the secondary heating station III, the folding station IV, the crimping station V and the transfer station VI. Stop. Each station I-VI has
Except for the container bottom crimping device 12, the following devices (not shown) are arranged. That is, in the supply station I, a container material supply device for covering the mandrel 11 with the container material B so that the end serving as the container bottom protrudes from the mandrel 11 is provided with the first and second heating stations II, III has primary and secondary container material end heaters for sequentially heating the same end of the container material B, and the folding station IV has a folding device for flatly folding the heated same end, The crimping station V has a crimping device 12 for crimping the flat folded end portion to form a bottomed cylindrical container. The container transfer devices for transferring the containers are arranged. The container B transferred to the container transport conveyor is filled with the contents while being transported by the conveyor, and then the top portion is closed to become a completed container.

The container bottom crimping device 12 is fitted on the tip end surface of the mandrel 11 stopped at the crimping station V, and is fitted over the mandrel 11 via a flatly folded end serving as a container bottom of the rectangular cylindrical container material B. A pressing member 31 that is movable in the axial direction of the mandrel to be pressed, a fixing member 32 that is arranged and fixed on an extension of the axial direction of the mandrel, and a movable member that is movably supported by the fixing member 32 in the axial direction of the mandrel.
33 and stopping means 34 for stopping the movable member 33 at a required position
And first and second links having one end connected to each other
Among them, a toggle link mechanism 37 is provided in which the other end of the first link 35 is connected to the movable member 33 and the other end of the second link 36 is connected to the crimping member 31.

The crimping member 31 is a flat plate having a flat crimping surface facing the distal end surface of the mandrel 11, and is attached to the inner surface of the movable plate 41. The movable plate 41 has a rectangular shape extending in a direction orthogonal to the extension of the mandrel axis. At both ends of the movable plate 41, rearwardly projecting guide rods 42 extending in parallel with the extension line are provided. The guide rod 42 is slidably supported by a support plate 43 attached to a not-shown apparatus frame. The fixing member 32 is in the shape of a rectangular parallelepiped, and is sandwiched between the front ends of plate-like brackets 44 provided on the support plate 43 so as to project rearward and perpendicular to the support plate 43.
The fixing member 32 is provided with an inward bottomed guide hole 45. A screw hole 46 for position adjustment is provided on the bottom wall of the guide hole 45, and two screw holes 47, 4 for set screw are provided on the peripheral wall of the guide hole 45.
8 are provided opposite to each other. Screw hole 4 for double set screw
Set screws 51 and 52 are screwed into 7, 48, respectively. The movable member 33 has a cylindrical portion 53 slidably fitted in the guide hole 45 and a plate-shaped portion integrally provided at an inner end of the column portion 53.
It consists of 54. Outer bottomed screw hole in the center of the axis of the cylindrical part 53
55 are provided. A groove 56 extending in the mandrel axis direction is provided on the outer peripheral surface of the cylindrical portion 53, and a lower set screw is provided in the groove 56.
The tip of 52 is fitted, thereby preventing the rotation of the movable member 33. The stopping means 34 has a screw rod 57. The threaded rod 34 is provided with a right-hand thread 58 and a left-hand thread 59, respectively. Right screw 58 is screw hole 46 for position adjustment
, And a left-hand screw 59 is screwed into the bottomed screw hole 55. A locking nut 60 is screwed into the outwardly projecting end of the screw rod 34. Connection of first link 35 and second link 32, connection of first link 35 and movable member 33, and second link
The connection between 36 and the crimping member 31 is achieved by horizontal pins 61-63. The first link 35 is integrally provided with an upwardly projecting ear 64, to which the lower end of a connecting rod 65 is connected via a horizontal pin 66. The connecting rod 65 is provided with a damper mechanism 67 and a length adjusting screw mechanism 68.
The upper end of the connecting rod 65 is connected to the tip of a driven arm 72 fixed to a horizontal rotation shaft 71. A drive arm 73 is fixed to the horizontal rotating shaft 71, and an end of the drive arm 73 is connected to an operating rod 74 which is moved forward and backward by means not shown.

When the operating rod 74 is moved forward and backward, the driving arm 73 swings, the rotating shaft 71 rotates, and the driven arm 72 swings.
It is transmitted to the connection end of the link 36. As a result, both links 3
The other end of the second link 36 moves in the axial direction of the mandrel 11, and the crimping member 31 moves accordingly.

The movable member 33 moves in the mandrel axial direction by loosening the set screws 51 and 52 and the nut 60 and rotating the screw rod 34 forward and reverse. When the movable member 33 is moved to a required position, and then the set screws 51 and 52 and the nut 60 are tightened, the movable member 33 is fixed to the fixed member 32.

As the movable member 33 approaches the mandrel 11, the working angle of the two links 35 and 36 increases, and the amount of movement of the crimping member 31 increases, but the crimping force decreases, and the movable member 33
The further away from the mandrel 11, the more links 35,3
The working angle of 6 becomes smaller, and the amount of movement of the crimping member 31 decreases, but the crimping force increases. Such a movable member 33
The adjustment of the amount of movement of the crimping member 31 and the adjustment of the crimping force by moving the pressure-sensitive member once need not be performed frequently once, and may be performed, for example, when rattling occurs in each part due to wear of each part of the apparatus. In addition, as the movable member 33 moves, the length of the connecting rod 65 may be adjusted as needed.

According to the present invention, when the position of the movable member with respect to the fixed member is changed, the operation angle of the two links is changed, and as a result, the movement amount and the crimping force of the crimping member are changed.
Only by changing the position of the movable member with respect to the fixed member, it is possible to easily change the moving amount and the crimping force of the crimping member.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view showing a crimping device together with one of mandrels, FIG. 2 is a longitudinal sectional view of the crimping device when not crimping, and FIG. 3 is a crimping device when crimping. FIG. 4 is a longitudinal sectional view of the crimping device taken along a direction perpendicular to FIGS. 2 and 3. 11 ... mandrel, 31 ... crimping member, 32 ... fixing member,
33 ... movable member, 34 ... stopping means, 35 ... first link,
36: second link, 37: toggle link mechanism, V: crimping station, B: container material.

Claims (1)

(57) [Claims] 1. A front end surface of a mandrel 11 stopped at a crimping station V, which is fitted over the mandrel 11 and pressed through a flatly folded end serving as a container bottom of a rectangular cylindrical container material B. In a container bottom crimping apparatus having a crimping member 31 movable in the axial direction of the mandrel, a fixing member 32 disposed on an extension of the mandrel axis line.
A movable member 33 supported movably in the same mandrel axis direction by a fixed member 32, a stopping means 34 for stopping the movable member 33 at a required position, and one end connected to each other by a horizontal pin 61. A first link 35 integrally provided with a protruding ear 64 and a second link 36 are provided.
The other end of 35 is connected to the movable member 33 by a horizontal pin 62,
The other end of the second link 36 is connected to the crimping member 31 by a horizontal pin 63, and the upwardly projecting ear 64 of the first link 35 is connected to a connecting rod 65.
Toggle link mechanism that is connected to the vehicle via a horizontal pin 66
37. A container bottom crimping device comprising: