JPH0468237B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a capping device that can be applied to capping machines, capping machines, and the like.

(Prior Art) FIGS. 2 and 3 show an example of a conventional lid tightening device. Now, the roll-on cap shown in Fig. 2 is a lid-clamping device that forms a screw cap from a metal plate such as aluminum that is placed over a container with a spiral groove on the upper outer circumferential surface, and then fastens the cap to the mouth of the container. ), when the turret table 5 is rotated by a drive device (not shown), the turret frame 14 integrated therewith also rotates, and the related members operate as follows.

First, the cam follower 15, which engages the upper cam 4 by means of a turret, moves the roll-on cap head 35 up and down. Further, when the planetary gear 24 rotates on its own axis by the turret, the roll-on cap head 35 rotates, but the conical cam 27 and the pressure block 34 do not rotate. Additionally, a cam follower 25 engages the lower cam 12 by means of a turret.
moves the conical cam 27 up and down.

Further, the rotation of the pivot arm 30 results in the rotation of the pivot arm 31 connected by the pivot shaft 29, which moves the forming roll 33 in and out of the axis of the roll-on cap head 35. After the bottle 8 covered with the roll-on cap 8a is gripped by the bottle gripping device 7 until the capping operation is completed, the above-mentioned operations are performed in combination, and the operations are roughly as follows.

First, when the roll-on cap head 35 descends, the tip of the pressure block 34 presses the roll-on cap 8a with the elastic force of the built-in spring, and then descends further and presses the top of the roll-on cap 8a with the elastic force F1 of the spring 19 as shown in FIG. When the forming roll 33 reaches a predetermined position, the relative position of the conical cam 27 with respect to the cam roller 32 rises, and a spring device (not shown) presses the forming roll 33 against the outer periphery of the roll-on cap 8a. Furthermore, since the roll-on cap head 35 is rotating with respect to the bottle 8, if the spiral groove of the bottle 8 and the pressure contact part of the forming roll 33 coincide, the roll-on cap 8a is deformed.
Thereafter, the forming roll 33 is rotated and guided by the screw groove of the bottle 8, forming a screw cap up to the end of the screw groove.

Thereafter, when the conical cam 27 descends relative to the cam roller 32, the forming roll 33 is released from the closed roll-on cap 8a, and further the roll-on cap head 35 is raised.
Preparations for the next action, such as discharging bottle 8, are completed.

(Problem to be solved by the invention) However, the compression coil spring 1 in FIG.
The capping vertical load (also referred to as capping force) due to the elastic force in step 9 can be appropriately adjusted depending on the type, material, and size of the crown or cap, or the type of container or filling material. Although compression coil springs are desirable from the perspective of capping quality, even if the elastic force can be adjusted, the range is narrow and each adjustment is time-consuming, making it difficult to switch from a roll-on capping machine to a crown capping machine. However, there were drawbacks such as the need to replace them. Moreover, there were problems that restricted the design of the crown, cap, and container.

The present invention was proposed in order to eliminate the above-mentioned conventional drawbacks, and the lid tightening vertical load can be set over a wide range.
Moreover, it is an object of the present invention to obtain a lid tightening device that can be easily operated arbitrarily.

(Means for solving the problem) In order to achieve this objective, the present invention includes a turntable for conveying bottles in an array at equal intervals, an annular rail disposed above the turntable, It has a cam groove provided in the annular rail so that the distance to the turntable differs in the circumferential direction, and a spindle assembly having a lid tightening head at the bottom, and the spindle assembly is synchronized with the turntable. In the lid tightening device that moves along the same cam groove, a cylinder that is arranged vertically and moves up and down,
A piston that moves up and down within the cylinder, a rod that is attached to the piston and protrudes from the bottom end of the cylinder, a pressure fluid supply pipe that communicates with the top of the cylinder and can change the supply pressure, and a piston that is installed inside the cylinder. a compression spring that constantly pushes the rod downward and presses downward the cap of the bottle conveyed on the turntable via a capping head connected to the lower end of the rod; The vertical load is applied as a composite force of the elastic force of the compression spring and the thrust of the piston corresponding to the supply air pressure, and this is used as a means to solve the problem.

(Function) Now, in the above configuration, if compressed air is supplied to the piping and the operation is performed, the lid tightening vertical load is given as a composite force of the elastic force of the compression spring and the thrust of the piston corresponding to the supply air pressure, and this The resultant force is adjusted by changing the supply air pressure.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows an embodiment of the lid tightening device of the present invention. Incidentally, in FIG. 1, the same parts as in the prior art shown in FIG. 2 are indicated using the same reference numerals. First, in FIG. 1, reference numeral 3 denotes an upper cam support, which is fixed to a column 48. Reference numeral 4 denotes an upper cam, which is a cylindrical grooved cam fixed to the upper cam support with bolts or the like. 5 is a turret table, supporting sleeve 4
7 and is connected to a drive device (not shown). A turret hub 6 is a mounting member fixed to the turret table 5. A bottle gripping device 7 is placed on the turret table 5.

Reference numeral 8 denotes a bottle having a spiral groove on the outer periphery of the inlet, and is held by a bottle gripping device 7. 8a is a roll-on cap, which is made of a metal plate such as aluminum and has a cup shape. A lower cam 12 is fixed to the fixed hub 50 with bolts or the like, and has a cylindrical grooved cam shape. 15
A plurality of cam followers are arranged on the circumference of the turret, are engaged with the upper cam 4, and have two rolls, one large and one small. 22 is a ball bearing mounted on the housing 61. 23 is a spindle sleeve, which is loosely fitted onto the shaft 67 and internally fitted into the bearing 22;
It is fixed with a retaining ring. 24 is a planetary gear,
It is fixed to the spindle sleeve 23. 25
is a cam follower that engages with the lower cam 12.

27 is a conical cam loosely fitted into the spindle sleeve 23 and screwed onto the sleeve 68; 28 is a body screwed onto the spindle sleeve 23; and 29 is the body 2.
8 is a pivot shaft loosely fitted through the pivot shaft; 30 is a pivot arm fixed to the upper end of the pivot shaft 29; 31 is a pivot arm fixed to the lower end of the pivot shaft 29;
32 is a cam roller which is pivotally supported by the pivot arm 30; 33 is a forming roll which is pivotally supported by the pivot arm 31 and is urged upward by the elastic force of a spring (not shown); 34 is a cam roller which is screwed onto a shaft 67 and which is coaxial 35 is a head for the roll-on cap constructed of the members 27 to 34 mentioned above.

49 is a fixed hub fixed to the support column 48;
0 is a fixed hub, which is fixed to a fixed hub 49. Reference numeral 51 denotes a sun gear, which loosely fits into the fixed hub 49 and is held by the fixed hub 50. 52 is an air cylinder fixed to the fixed hub 49;
3 is a pipe, which is an air passage connecting the air cylinder 52 to the top of the support column 48. 54 is fixed hub 4
O fits into the groove of 9 and seals between it and the support column 48.
The ring 55 is a turret frame assembly, which is fixed to the turret hub 6 and whose upper portion is supported by the support column 48. 56 is the turret frame assembly 55
This is an O-ring for sealing between the support 48 and the support 48.

57 is a cylinder suspended from the cam follower 15 and guided by the turret frame assembly 55;
58 is a piston fitted into the cylinder 57;
9 is a cap fixed to the cylinder 57 with bolts or the like; 60 is a ventilation hole formed in the cap 59; and 61 is a housing, which is fixed to the piston 58 through the cap. 62 is a compression coil spring that applies elastic force to the piston 58 within the cylinder 57; 63 is a key fixed to the cylinder 57 and engaged in a groove in the turret frame assembly 55; 64 is a cylinder 5;
7 and the housing 61 for sealing
65 is a sealing O-ring disposed between the cylinder 57 and the piston 58; 66 is a sealing O-ring disposed between the piston 58 and the housing 61; 67 is a shaft screwed into the housing 61; , 68 is a sleeve that engages with the turret frame assembly 55, and 69 is a pipe (flexible hose).
This is an air passage connected from the cylinder 57 to the top of the column 48. Further, 70 is a spindle assembly.

Next, the operation of the embodiment configured as above will be explained. First, when the turret table 5 is rotated by a drive device (not shown), the turret frame assembly 55 is rotated via the turret hub 6.
The cam follower 15 engaged with the upper cam 4 by the turret moves the roll-on cap head 35 up and down, and the planetary gear 24 rotates, so that the roll-on cap head 3
5 is rotated, but the conical cam 27 and pressure block 34 are not rotated. Also, a cam follower 25 that engages the lower cam 12 by means of a turret causes the conical cam 27 to move up and down. When the conical cam 27 descends relative to the cam roller 32, the cam roller 32 rotates and moves to the large diameter portion of the conical cam 27 against a spring device (not shown) that presses the conical cam roller 32. , the pivot arm 30 rotates. The same is true vice versa.

The pivot arm 30 is rotated by the pivot shaft 29.
The rotation of the pivot arm 31 connected with
The forming roll 33 is attached to the roll-on cap head 3
Move it in and out with respect to the axis of 5. After the bottle 8 covered with the roll-on cap 8a is gripped by the bottle gripping device 7, the above-mentioned operations are performed in combination until the lid-clamping operation is completed, and the operations are roughly as follows.

First, when the roll-on cap head 35 descends, the tip of the pressure block 34 presses the roll-on cap 8a with the elastic force of the spring built in, and when it further descends and the forming roll 33 reaches a predetermined position,
The relative position of the conical cam 27 with respect to the cam roller 32 rises, and a spring device (not shown) moves the forming roll 33
is pressed against the outer periphery of the roll-on cap 8a. Also, for the bottle 8, there is a head 35 for the roll-on cap.
is rotating, so when the spiral groove trough of the bottle 8 and the pressure contact portion of the forming roll 33 coincide, the roll-on cap 8a is deformed, and after that, the forming roll 33 is guided by the spiral groove of the bottle 8 while rotating. , formed as a screw cap until the end of the spiral groove.

After that, when the conical cam 27 descends relative to the cam roller 32, the forming roll 33 is released from the closed roll-on cap 8a, and furthermore, the roll-on cap head 35 is raised, and the bottle 8 is discharged. Complete preparation for action. In general, in a capping device, a plurality of roll-on cap heads 35 are arranged on the circumference of the turret, so that in addition to the above-mentioned actions, bottle feeding, bottle ejection, etc. are carried out during one rotation of the turret. do.

Next, if compressed air is supplied to the piping 69 and the bottle 8 is moved, the vertical load applied to the bottle 8 and the roll-on cap 8a will be a combination of the elastic force of the spring 6 and the thrust of the piston 58 corresponding to the supplied air pressure. given as power. This resultant force is adjusted by changing the supply air pressure. Note that this supply air pressure may be set to negative pressure.

(Effects of the Invention) The present invention is configured as described in detail above, and the vertical load for lid tightening is given as a composite force of the elastic force of the compression spring and the thrust of the piston corresponding to the supply air pressure. The vertical load can be arbitrarily easily set over a wide range, and its adjustment is also easy. The present invention can be applied to various crown and cap closure devices.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing only the left half of a lid tightening device according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view showing only the left half of a conventional lid tightening device, and Fig. 3 is an enlarged view of the main parts. It is a diagram. Explanation of the main parts of the figure, 35... Roll-on cap head (lid tightening head), 57... Cylinder,
58... Piston, 62... Compression spring, 67...
Shaft (rod), 69...Piping (pressure fluid supply pipe).

Claims (1)

[Claims] 1. A turntable that transports bottles in an array at equal intervals, an annular rail installed above the turntable, and cams installed on the annular rail such that the distances to the turntable differ in the circumferential direction. A lid tightening device that has a groove and a spindle assembly having a lid tightening head at the bottom, and in which the spindle assembly moves along the cam groove in synchronization with the turntable, is arranged vertically and moves up and down. a cylinder that moves up and down within the cylinder, a rod that is attached to the piston and projects from the lower end of the cylinder, a pressure fluid supply pipe that communicates with the upper part of the cylinder and can change the supply pressure, and that is installed inside the cylinder. A compression spring is provided which constantly pushes the rod downwards via a piston and presses downwards the cap of the bottle conveyed on the turntable via a capping head connected to the lower end of the rod. The lid tightening device is characterized in that the applied vertical load is given as a combined force of the elastic force of the compression spring and the thrust force of the piston corresponding to the supply air pressure.