JP2509905Y2 - Lid edge bending device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for bending an edge portion of a lid placed on a container.

2. Description of the Related Art As an apparatus of this type, for example, as disclosed in Japanese Patent Laid-Open No. 48-50890, the edge of a lid on a container is protruded downward from the flange at the edge of the container. A slat conveyor that is intermittently driven so that the slats sequentially stop at the folding station, and a container insertion hole is formed in the slat, and the slat is formed around the container insertion hole on the upper surface of the slat. , A container conveyor having a flat part of the same shape as the flange, the outside of the flat part is lower than the flat part, and an edge is provided at the boundary between the flat part and the outside, and the container is stopped at the folding station. There is a horizontal lift plate located above the slats, and a downward taper that is fixed to the lift plate so that it is located right above the container insertion hole and that faces the edge from above. A folding member, has been known and a lifting means for lifting the elevating plate such tapered portion of the bending member is pressed through the edge of the lid to the edge.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-described conventional device, if the height of the slats varies, the pressing force of the bending member also varies, and if the pressing force is excessive, the edge of the lid is torn. Therefore, if the pressing force is too small, the bending of the edge portion of the lid becomes insufficient. further,
If multiple container insertion holes are provided in the length direction of the slat to bend the edges of multiple lids at the same time, the slat can also vary in height in addition to variations in slat height. It was a cause of poor bending of the edges.

An object of the present invention is to provide a lid edge bending device that solves the above problems.

Means for Solving the Problems An edge folding device for a lid according to the present invention is a device for bending down an edge protruding from a container mouth edge flange of a lid covered with a container, A slat conveyor that is intermittently driven so that the slats sequentially stop at a folding station, wherein a plurality of container insertion holes are formed in the slats in a row in the length direction of the slats, and each container on the upper surface of the slats is formed. A container transport conveyor in which a flat portion having the same shape as the flange is provided around the insertion hole, and the outside of the flat portion is lower than the flat portion, and an edge is provided at the boundary between the flat portion and the outside, Horizontal elevating plate placed above the slats stopped at the station, and below the elevating plate and positioned just above each container insertion hole and outside the corresponding container insertion hole As many bending members as there are container insertion holes having downward taper portions facing the edges from above, and each bending member is provided upright and slidably passes through the lifting plate so that its upper end is above it. The same number or more as the number of the bending members that are projected on the guide rods, the same number of stoppers as the number of the guide rods that are provided at the upper protruding end of each guide rod, and between the lifting plate and each bending member. The same number of compression coil springs as the guide rods are provided so as to surround the guide rods, and the taper portion of each bending member is pressed against the edge via the edge portion of the lid so that the springs are compressed in this state. And an elevating means for elevating the elevating plate.

In the lid edge folding device according to the present invention, when the tapered portion of each bending member is pressed against the edge via the lid edge,
For example, even if the slats are not horizontal but inclined and the height of each edge varies, the variation is absorbed by the amount of bending of the spring, so the pressing force of all bending members is constant. Become.

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

Here, the front and rear means that the container is carried by the conveyor described below and proceeds (in the direction indicated by the arrow A in FIG. 3).
The opposite of this is defined as back, and left and right are defined as going backward.

In Figures 1 and 2, a container transport conveyor 11 is shown. The container transfer conveyor 11 is an intermittent drive slat conveyor, and the slat serves as a container holder 12. Posts 13 and 14 are erected on both left and right sides of the container holder 12 stopped at a predetermined position, and the top plate 1 is placed on the upper end thereof.
5 has been handed off. A pair of left and right horizontal rods 16 are mounted on the top plate 15, and a horizontal support plate 18 is hung from both ends of these horizontal rods 16 via two pairs of parallel links 17 so as to be swingable in the front-back direction. A fluid pressure cylinder 19 is attached downward to the center of the support plate 18, and a rectangular horizontal elevating plate 22 that is long in the left-right direction is attached to the lower end of its piston rod 21. Two guide rods 23 are provided upright on the upper surface of the lift plate 22 at intervals in the left-right direction.
Is slidably fitted in a guide tube 24 provided on the lower surface of the support plate 18. Further, four folding units 25 are hung on the elevating plate 22 side by side in the lengthwise direction thereof, and a pair of positioning units 26 are hung outside the folding units 25 at both ends thereof. Also, the left and right columns 1
A horizontal bar 27 is passed under the container holder 12 at the lower ends of the holders 3 and 14, and a holder receiver 28 is provided on the horizontal bar 27.

As shown in detail in FIG. 1, the container holder 12 has a container insertion hole 31. The number of container insertion holes 31 is four corresponding to the four folding units 25. Around the container insertion hole 31 on the upper surface of the holder 12, a flat portion 32 having the same shape as the flange F of the container C is provided, and the outside of the flat portion 32 is a flat portion 32.
An edge 33 is provided at the boundary between the flat portion 32 and the outer portion thereof which is made lower.

The folding unit 25 includes a folding member 41 arranged above the container holder 12 stopped at a predetermined position, a heater 42 attached to the upper surface of the folding member 41, and a heater 42.
And a cover 43 that covers the. Bending member
41 is a cap shape. A downward taper portion 45 is provided at the lower portion of the inner peripheral surface of the peripheral wall 44, and the taper portion is provided when the folding unit 25 descends together with the elevating plate 22.
The 45 is adapted to be pressed against the edge 33 of the container holder 12. A center hole 47 is formed in the top wall 46 of the bending member 41, and the heater 42 has a center hole 48 that matches the center hole 47. A guide tube 49 is provided at the center of the cover 43 so as to penetrate the cover 43 and hang down from the cover 43 into the center hole 48 of the heater 42, and a vertical rod 51 is passed through the guide tube 49. The upper end of the vertical bar 51 projects above the guide cylinder 49, and a stopper 52 is fixed to the projecting part. A shallow cap-shaped lid retainer 53 is fixed to the lower end of the vertical rod 51.
A compression coil spring 54 is interposed between the guide cylinder 49 and the lid retainer 53 so as to surround the vertical rod 51. Guide bars 55 are provided in an upright shape at positions where the peripheral edge of the cover 43 is divided into three equal parts. The upper end of the guide rod 55 penetrates the elevating plate 22 and projects upward, and a stopper 56 is fixed to the projecting part. Further, it surrounds the guide rod 55 and the lift plate 22 and the cover 43.
A compression coil spring 57 is interposed between them.

The position cutting unit 26 includes a vertical rod-shaped positioning member 61,
A plate-like support bracket 62 is provided which is provided in a hanging manner on the elevating plate 22 and holds the positioning member 61 so as to be able to move up and down.
The positioning member 61 includes a lower large diameter portion 63 and an upper small diameter portion 64. The lower large diameter portion 63 slidably penetrates through the bracket 62, and a taper portion 65 is provided at the lower end portion thereof. On the other hand, the recess 66 that allows the taper portion 65 to enter is provided in the container holder.
It is provided at the end of twelve. An upper end portion of the upper small diameter portion 64 slidably penetrates the elevating plate 22 and projects upward, and a stopper 67 is fixed to the protruding portion. A spring bearing 68 is placed on the boundary between the lower large diameter portion 63 and the upper small diameter portion 64, and a compression coil spring 69 is interposed between the spring bearing 68 and the elevating plate 22 so as to surround the upper small diameter portion 64. There is.

When the container holder 12 stops at a predetermined position, the fluid pressure cylinder 19 is operated to lower the elevating plate 22. Then, first, the tapered portion 65 of the positioning member 61 enters the concave portion 66 of the holder 12, whereby the swinging of the support plate 18 is restricted, and the positional relationship between the holder 12 and the bending member 41 becomes constant. Then, the taper portion 45 of the bending member 41 that has descended is held in the holder.
Edge 33 through edge E of lid L of container C held by 12
It is elastically pressed by the force of the spring 57, whereby the edge E is bent downward. At this time, the bending member 41 is always heated by the heater 42, and the lid retainer 53 is elastically pressed against the lid L by the force of the spring 54. The heating by the heater 42 helps to keep the edge E of the folded lid L as it is.

When the bending work is completed, the bending member 41 is raised. When the taper portion 45 of the folding member 41 separates from the edge 33, the lid L is sandwiched between the taper portion 45 and the container C and the lid L tend to be lifted as the folding member 41 rises. The lid retainer 53 prevents this.

Advantageous Effects of Invention According to the present invention, when the tapered portion of each bending member is pressed against the edge via the edge portion of the lid, for example, the slat is not horizontal but inclined, and the height of each edge is increased. Even if there are variations, since the variations are absorbed by the amount of bending of the springs, the pressing force of all the bending members is constant, and the edges of the lids are unevenly bent. No, it can be surely bent downward.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is an enlarged sectional view taken along the line II of FIG. 3, FIG. 2 is a front view, and FIG. 3 is III of FIG. -It is a sectional view taken along line III. 11 …… Conveyor, 12 …… Slat, 22 …… Lift plate, 31…
… Container insertion hole, 32 …… flat part, 33 …… edge, 41 …… folding member, 45 …… tapered part, 55 …… guide rod, 56 …… stopper, 57 …… spring, C …… container, F ... Flange, L ...
… Lid, E… Edge.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoshi Hashimoto Taro Kitajima-cho, Itano-gun, Tokushima Nishinokawa 10-1 Nishinokawa Machinery Co., Ltd. (56) References JP-A-48-50890 (JP, A) ) JP-A-58-187336 (JP, A)

Claims (1)

(57) [Scope of utility model registration request] 1. A device for bending an edge E of a lid L placed on a container C downward from a flange F of a container C at the mouth of the container C, wherein slats 12 are sequentially stopped at a bending station. The slat conveyor is driven intermittently as described above, and a plurality of container insertion holes 31 are formed in the slat 12 in a line in the length direction of the slat. A container conveyance conveyor 11 in which a flat portion 32 having the same shape as that of the flange F is provided, the outside of the flat portion 32 is made lower than the flat portion 32, and an edge 33 is provided at the boundary between the flat portion 32 and the outside thereof. A horizontal lifting plate 22 arranged above the slats 12 stopped at the folding station, and a corresponding container insertion hole arranged below the lifting plate 22 and directly above each container insertion hole 31. Above the outer edge 33 of the 31 Bending members 41 of the same number as the container insertion hole 31 having the downward taper portion 45 facing from, and each bending member 41 provided upright and slidably penetrating the lifting plate 22 so that the upper end thereof is The same number or more of the guide rods 55 as the bending members 41 protruding upward, the same number of stoppers 56 as the guide rods 55 provided at the upward protruding end of each guide rod 55, the lift plate 22 and each. The same number of compression coil springs as the guide rods 55 are interposed between the bending members 41 so as to surround the guide rods 55.
57, and the elevating means for elevating the elevating plate 22 so that the tapered portion 45 of each bending member 41 is pressed against the edge 33 via the edge E of the lid L and the spring 57 is compressed in this state. A device for folding the edge of the lid.