JPH11255291A - Capping apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control descending speed of a capping head at the time of capping. SOLUTION: A capping head 2 is coupled to a piston rod 30b of an air cylinder 30 which rises/lowers along a guide rod 8. Compressed air adjusted by a regulator is introduced into the cylinder 30 to absorb impact at the time of capping. The cylinder 30 is coupled to an end 34a of a lever 34, while the other end 34b of the lever 34 is coupled to an end 40b of an L-shaped rotating body 40 which rotates with a fulcrum 38 as the center. The other end 40c of the L-shaped rotating body 40 is coupled to a piston rod 44a of a lifting air cylinder 44. As the rod 44a is extended, the rotating body 40 rotates and pulls up the lever 34 while being inclined to have the capping head 2 raised. When the rod 44a is contracted, rotation of the rotating body 40 causes the lever 34 to be straight while descending, thereby decreasing descending speed of the capping head 2, and capping is performed at this time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapping device,
In particular, by lowering the capping head,
The present invention relates to a plugging device for plugging a cap held by a capping head into a mouth of a container.

[0002]

2. Description of the Related Art A cap such as a crown is held on a capping head, and the capping head is lowered toward a container supplied below the capping head, thereby fitting the held cap to a mouth of the container. Are conventionally widely known. In such a plugging device, in order to reduce the impact on the container at the time of plugging, the moving speed at the time of plugging performed at the end of the descent is made slower than during the descent of the capping head.

[0003] As described above, in order to make the descent speed of the capping head at the time of tapping slower than before, a cam is generally used conventionally. That is, a cam follower is provided on a rod for raising and lowering the capping head, and this cam follower is engaged with a rotating cam having a cam curve formed such that the speed is high during the descent of the rod and slow during the final stage of plugging. The rod and the capping head are raised and lowered in accordance with the rotation of the cam.

[0004]

In the conventional tapping device, it takes time and effort to process the curve of the rotary cam, and the number of components such as the cam follower and the lifting rod is increased, resulting in a complicated structure and high cost. Met.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a low-cost plugging apparatus which has a simple structure and can reduce the speed at the end of descent of a capping head. It is assumed that.

[0006]

According to the present invention, there is provided a capping apparatus comprising: a capping head for holding a cap and capping a mouth of a container; an elevating body having the capping head attached to a lower portion thereof; A cushioning means provided on the body, for alleviating the impact at the time of stoppering by the capping head, a lever having one end rotatably connected to the elevating body, and the other end of the lever being connected to the fulcrum. A rotatable body that is rotatable, and an air cylinder that is connected to a rod at a position different from a connecting portion between the lever and the rotatable body and that reciprocally rotates the rotatable body by a predetermined angle. At the end of the stopper, the fulcrum of the rotating body and both ends of the lever are positioned substantially in a straight line.

In this plugging device, plugging is performed by rotating a rotating body, converting this rotation into linear motion via a lever, and lowering the lifting / lowering body and the capping head. Since the fulcrum of the moving body and both ends of the lever are positioned substantially on a straight line, the descent speed of the capping head is lower at the time of tapping than during the descent before that.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 is a side view of a tapping device according to an embodiment of the present invention, FIG. 2 is a view in the direction of arrow A in FIG.
FIG. 3 is a sectional view taken along line III-III in FIG. 1. In the figure, reference numeral 2 denotes a capping head that holds a cap and performs stoppering, and is attached to the lower surface of the elevating plate 4 and moves up and down integrally. The lifting plate 4 is fixed to a horizontal overhang 6 a of a machine frame 6 mounted on a rod 5.
The vertical guide rod 8 is slidably fitted to the vertical guide rod 8 via a slide bush 10 and guided up and down.

The capping head 2 includes a lifting plate 4
A detachable mounting plate 14 is attached to the lower surface of the device via bolts 12, and a housing 18 is fixed below the plate 14 via three stays 16 (see FIGS. 4 and 5). ing. A guide hole 18a penetrating vertically is formed in the housing 18, and a throat 20 is fitted to a lower portion of the guide hole 18a.
A head pin 22 is slidably inserted in the guide hole 18a and the throat 20. This head pin 2
A sub-spring 26 is interposed between the upper part of the second and the spring receiving member 24 fixed to the upper mounting plate 14 side. Further, on one side surface (left side surface in FIG. 1) of the capping head 2, a removable cover 28 is provided.
Is installed. The capping head 2 can be exchanged as a whole by removing the mounting plate 14 when plugging caps of different shapes.

An air cylinder 30 with a guide for controlling the tapping load is fitted to the two guide rods 8 so as to be able to move up and down. The piston 30 of this air cylinder 30 with guide
The lower end of the piston rod 30b connected to the piston rod 30a (see FIG. 2) is fixed to the upper surface of the lifting plate 4, and the air pressure adjusted by the regulator is introduced into the pressure chamber 30c above the piston 30a. It has become. Therefore, the capping head 2 and the lifting plate 4 move up and down integrally with the air cylinder 30 with a guide, and when an impact force acts from the lower capping head 2 side, the impact is absorbed by the air pressure. Can be relaxed. An arbitrary tapping load can be obtained by adjusting the air pressure supplied into the pressure chamber 30c. That is, when the air pressure supplied to the pressure chamber 30c is high, the force for absorbing the shock applied from below at the time of plugging is small, so that the plugging load becomes large. Conversely, when the supplied air pressure is low, Since the force for absorbing the impact at the time of plugging is large, the plugging load is reduced.

An opening (window) 6c is formed in the vertical wall surface 6b of the machine frame 6 to which the guide rod 8 is fixed, over the range in which the guide-equipped air cylinder 30 moves up and down. A bracket 32 is fixed to the rear surface (right side in FIG. 1) of the guide-equipped air cylinder 30 and protrudes outward from the window 6c of the machine frame 6, and one end 34a of a lever 34 is provided with a horizontal pin 35 at the end thereof. It is connected rotatably through the.

A bracket 36 is fixed to the upper portion of the machine frame 6 on the back side of the capping head 2 and the air cylinder 30 with a guide, and an L-shaped rotating body is fixed to the bracket 36 via a horizontal fulcrum pin 38. The fulcrum portion 40a provided in the middle of the L-shaped rotating body 4
0 is rotatably supported. The other end 34b of the lever 34 is connected to one end (the lower end) 40b of the L-shaped rotating body 40a via a horizontal pin 41.

An air cylinder 4 for raising and lowering the capping head is mounted on a mounting table 42 fixed on the bottom surface 6d of the machine frame 6.
4 is swingably supported.
Of the L-shaped rotating body 40,
An end (upper end) 40 c opposite to the end 40 b to which the lever 34 is connected is connected via a horizontal connecting pin 45. Accordingly, with the expansion and contraction of the piston rod 44a of the air cylinder 44, the L-shaped rotating body 40 rotates by a predetermined angle around the fulcrum pin 38, and the lever rotates when rotating upward (counterclockwise rotation). The lever 34 is pulled up while rotating, or when rotated downward (clockwise rotation), the lever 34 is pushed down to return to an upright state. As a result, the guided air cylinder 30 and the capping head 2 move up and down along the two guide rods 8. A chute 46 for supplying a cap (not shown) is arranged on a side portion of the capping head 2 at a raised position, and the cap is removed from the chute 46 before the capping head 2 descends and performs capping. Receive and hold.

The operation of the plugging device according to the above configuration will be described. Piston rod 4 of air cylinder 44 for lifting
When the piston 4a is extended, the L-shaped rotating body 40 having one end 40c connected to the piston rod 44a is moved to the fulcrum pin 38.
Around the piston rod 44 in the counterclockwise direction.
The connecting portion (pin 45) between the “a” and the L-shaped rotating body 40 moves upward as shown in FIG. 1, and the connecting portion (pin 41) between the L-shaped rotating body 40 and the lever 34 also moves. Move to the position shown. Then, the end 34 a of the lever 34 connected to the air cylinder 30 with guide rises vertically, and the air cylinder 30 with guide also moves to this end 34.
It rises by the same height as a.

With the guide-equipped air cylinder 30 and the capping head 2 raised, a cap (not shown) is supplied from the chute 46 to the inside of the capping head 2 and held therein. On the other hand, below the capping head 2, a container (not shown) filled with a liquid is supplied. Here, the piston rod 44a of the lift air cylinder 44 is contracted. Then, the L-shaped rotating body 4 whose one end 40c is connected to the piston rod 44a.
0 rotates clockwise, and the other end 4 of the L-shaped rotating body 40
0b (the connecting portion with the lever 34) moves in a direction directly below the fulcrum portion 40a. With this rotation, the lever 34, which has been lifted upward in an inclined state, also moves toward an upright state while descending.

As the lever 34 moves from the state of being pulled upward to the inclined state to the state of standing upright while descending,
The air cylinder 30 with the guide is lowered, and the capping head 2 is lowered toward the container to move the capping head 2.
Is plugged into the mouth of the container. Capping is completed when the guide-equipped air cylinder 30 is at the lowest position, that is, when the fulcrum 40a of the L-shaped rotating body 40 and both ends 34b and 34a of the lever 34 are vertically aligned. Thus, the L-shaped rotating body 40
Is changed into a linear motion via a lever 34, and the air cylinder 30 with a guide and the capping head 2 are rotated.
Is moved down to perform capping, so that the moving speed can be controlled so that the moving speed is high during the lowering of the capping head 2 and becomes slow at the time of tapping at the final end of the lowering. Impact can be reduced.

The capping head 2 is connected to an air cylinder 30 with a guide so that the air pressure supplied into the pressure chamber 30c of the air cylinder 30 reduces the impact from below at the time of tapping. Therefore, an arbitrary tapping load can be obtained by adjusting the air pressure supplied to the air cylinder with guide 30 by the regulator.

In the above-described embodiment, the impact at the time of tapping is absorbed by the air cylinder 30 which is guided by the guide rod 8 and rises and falls. However, instead of the air cylinder 30 with a guide, a spring with a guide is used. You may make it absorb. In the above embodiment, L
Although the character-shaped rotating body 40 is connected to the lifting / lowering air cylinder 44 for rotation, it is not limited to the L-shape, and may be a fan-shaped or triangular-shaped rotating body.
In other words, any structure may be used as long as it rotates by a predetermined angle due to the operation of the lifting / lowering air cylinder 44, converts the rotation into linear motion via the link (the lever 34), and raises and lowers the air cylinder 30 with the guide and the capping head 2.

[0019]

As described above, according to the present invention, a capping head for holding a cap and plugging it into the mouth of a container, an elevating body having the capping head attached to a lower portion, and an elevating body Buffer means for reducing the impact at the time of stoppering by the capping head, a lever one end of which is rotatably connected to the elevating body, and the other end of this lever being connected, with the fulcrum as the center. A rotatable rotatable body, and an air cylinder connected to a rod at a position different from a connecting portion of the rotatable body to a lever, and an air cylinder for reciprocating the rotatable body by a predetermined angle. Occasionally, by positioning the fulcrum of the rotating body and both ends of the lever almost in a straight line, the descent speed of the capping head at the time of plugging can be made slower than during the descent. , A simple structure, it is possible to provide an inexpensive stoppered device that does not require complicated processing or the like.

[Brief description of the drawings]

FIG. 1 is a side view of a tapping device according to an embodiment of the present invention.

FIG. 2 is a view in the direction of arrow A in FIG. 1;

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a sectional view taken along the line VV in FIG. 2;

[Explanation of symbols]

 2 Capping head 4 Elevating plate (elevating body) 30 Air cylinder with guide (buffering means of elevating body) 34 Lever 34a Lever end 34b Lever end 40 Rotating body 40a Rotating body fulcrum 44 Elevating air cylinder 44a Elevating Air cylinder rod

Claims (2)

[Claims] 1. A capping head for holding a cap and plugging the opening of a container, an elevating body having the capping head attached to a lower part thereof, and a capping head provided on the elevating body for plugging by the capping head. Shock absorbing means, a lever having one end rotatably connected to the elevating body, a rotatable body connected to the other end of the lever and rotatable about a fulcrum, and a rotatable body A rod is connected at a position different from the connection portion with the lever, and an air cylinder that reciprocates the rotating body by a predetermined angle is provided. Is positioned substantially on a straight line. 2. The plug according to claim 1, wherein the buffer means provided on the elevating body is an air cylinder, and the plugging load is controlled by adjusting the air pressure supplied to the air cylinder. apparatus.