JPH0227947Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for tightening and sealing a circular inner lid provided on the top plate of a drum without rotating the drum.

Conventionally, as a device for tightening the inner lid provided approximately at the center of the top plate of a drum without rotating the drum, for example, as shown in FIG. Press and fix from above with plate 3,
By pushing down the casing 4, a large number of claws 5 divided over the entire outer circumference of the inner lid 1 open the inner lid 1.
The vertical outer edge 1a of the inner lid 1 is pressed toward the center of the inner lid 1 so as to be brought into close contact with the curled portion 6. However, with this device, the crimping force is weak, so there are restrictions on the thickness of the inner lid 1, and since only the areas where the claws 5 meet are crimped, the airtightness is poor and the appearance is not good. . In addition, in the tightening machine shown in FIG. 2, by pushing down the casing 8 with the cylinder 7, the push plate 9 presses and fixes the entire upper surface of the inner lid 1, and at the same time, the screw shaft 12 is rotated and a roller 10 is attached to the lower end. is rotated around the outer periphery of the inner lid 1, and at the same time, the lower end of the casing 8 pushes the outer inclined part of the arm 11, causing the arm 11 to rotate.
Press the inner lid 1 in the direction of the central axis and use the roller 10 to close the inner lid 1.
The perpendicular outer edge 1a of the curved portion 6 is pressed against the curled portion 6. However, with this device, the entire outer edge of the inner lid 1 can be crimped to the curled portion, but the cylinder 7
Since the arm 11 is rotated and crimped using only the pushing force, the crimping force is weak, which poses a problem in that there are restrictions on the dimensions, thickness, and degree of sealing of the inner lid.

The present invention eliminates these conventional drawbacks and develops a tightening machine that can seal even thick inner lids. Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a front view showing an embodiment of the tightening machine of the present invention, and FIG. 4 is a partially sectional view of the main parts thereof. As shown in the figure, the main parts of this invention are drum 1.
A presser plate 15 that presses and fixes the inner lid 14 of 3 from above.
The rotating shaft 16 rotatably supported at the lower end and the outer edge 14a of the inner lid 14 are connected to the curled portion 17a of the top plate 17.
A plurality of arms 19 have rollers 18 rotatably supported at their tips, and an actuating piece 20 that presses the base of the arms 19 to drive the rollers 18 in the direction of the rotating shaft 16 (see FIG. 4). ). That is, a disc-shaped press plate 15 having a diameter slightly smaller than the inner diameter of the circular inner lid 14 is horizontally and rotatably attached to the lower end of the rotating shaft 16 via a bearing 21. A cup-shaped casing 22 that opens downward is attached to the rotating shaft 16 via a linear motion bearing 23 via an upper surface 22a and an intermediate support plate 22b, and a spline near the upper end of the rotating shaft 16 is attached to the rotating shaft 16. A two-stage pulley 24 is fitted into the. The pulley 24 is connected to a drive device 26 and an idler 27 via belts 25 and 25a, respectively.
It can be raised and lowered slightly while rotating.

Next, a roller 18 whose side surface is in contact with the outer surface of the curled portion 17a of the top plate 17 is attached to the lower end of the arm 19 so as to be rotatable around its central axis via a bearing 18a. On the other hand, a roller 28 that is rotatable around a horizontal axis perpendicular to the longitudinal direction of the arm 19 is disposed on the side surface facing the rotating shaft 16 near the upper end of the arm 18 . A notch 29 is provided on the inner surface of the central portion of the arm 19, and is loosely fitted to the outer edge of a horizontal support plate 30 that is located above the presser plate 15 and fixed to the rotating shaft 16. Further, an annular spring 31 is fitted into the upper outer side of the notch 29 of the arm 19, and the notch 29 is fitted with an annular spring 31.
The lower end of the arm 19 is urged to open outward using 9 as a fulcrum. In order to smoothly tighten the inner lid 14, at least two arms 19 are required, but three or more arms 19 are desirable.

Next, the operating top 20 is concentric with the rotating shaft 16 and has a truncated conical shape whose external side surface expands upward, and its upper surface is fixed to the intermediate receiving plate 22b via a bearing 32. Furthermore, a vertical bolt 33 is fastened to the lower surface of the operating top, and the bolt 33 loosely passes through a hole 30a drilled in the support plate 30, and the support plate 30 is suspended by the bolt head 33a. There is. Further, the casing 22 is attached to a cylinder 35 via a rod 34 fixed to the upper surface.
It is possible to go up and down vertically. Therefore, operating top 2
0 moves up and down in conjunction with the up and down movement of the casing 22, and rotates in conjunction with the rotation of the rotating shaft 16. Also, since the outer slope of the operating top 20 is in contact with the roller 28 of the arm 19, when the operating top 20 descends to the position indicated by the two-dot chain line A in FIG. 4, the roller 28 is moved outward as shown in B. When pressed, the arm 19 is tilted as shown in C, and the roller 18 is moved to the position shown in D.

The operation of the tightening machine of the present invention constructed as above will be explained below.

First, the drum can 13 is fixed at a position where the center of the inner lid 14 coincides with the central axis of the rotating shaft 16, and when the drive device 26 is started, the rotating shaft 16 rotates via the belt 25 and the pulley 24, and the supporting plate 30 The arm 19 in contact with the outer circumferential surface of the arm 19 also rotates around the rotating shaft 16 with the support plate 30 in between. Further, the operating top 20 also rotates around the rotating shaft 16 via the bolt 33, but since there is a bearing 32, the casing 2
2 does not rotate. Furthermore, since the operating top 20 is in the position shown by the solid line in FIG. 4, the lower end of the arm 19 is in an outwardly open state, and the roller 18 is also stationary. (Position of solid line in Figure 4).

Next, start the cylinder 35 and start the rod 34.
(See Figure 3) When the casing 22 is lowered, the bolt 33 is lowered, so the bolt head 3
The rotating shaft 16 suspended by 3a also descends. Then, the presser plate 15 disposed at the lower end of the rotating shaft 16 abuts against the inner cover 14, and when a load is applied, the presser plate 15 stands still due to the bearing 21 and presses the inner cover 14 from above. When the casing 22 further descends, the position of the rotating shaft 16 does not change because of the bearing 23 and because the bolt 33 is loosely fitted, and the intermediate support plate 22
As the actuating top 20 descends via the bearings 32 and the bearings 32 and pushes the rollers 28 outward, the arm 19 tilts about the notch 29 as a fulcrum, and the roller 18 at the lower end abuts against the outer edge 14a of the inner lid 14. and start rotating. Further, when the casing 22 is lowered, the roller 18 rotates and presses the outer edge 14a of the inner lid 14 onto the curled portion 17a.

Further, since the entire arm 19 rotates around the outer periphery of the inner lid 14, the inner lid 14 can be tightened uniformly.

When the tightening of the inner lid 14 is completed, the cylinder 35 is operated in the opposite direction to raise the casing 22, which causes the operating top 20 to rise and the arm 19 to move upward.
is opened by the force of spring 31, and at the same time bolt 33
Since the support plate 30 and rotating shaft 16 are raised, the presser plate 15 is also pulled up and returned to its original position, thus completing the work. These operations can be performed automatically and continuously using timers, various sensors, sequential controllers, etc.

As explained in detail above, the present invention carefully connects the rotating part and the lifting part, and also provides a driving device for each part, and opens and closes the arm to the operating point, so it is possible to control which part The inner lid can be tightened extremely smoothly and strongly without applying excessive force such as squeezing. Therefore, the drum can can be sealed even if a thick inner lid is used, and it is extremely effective in sealing off harmful substances and fluids.

[Brief explanation of the drawing]

Figures 1 and 2 are a partially cutaway front view showing an example of a conventional tightening machine, Figure 3 is a front view of the tightening machine of the present invention, and Figure 4 is a partially sectional view of its main parts. be. 13...Drum can, 14...Inner lid, 15...Press plate, 16...Rotating shaft, 17...Top plate, 17a...
... Curl part, 18 ... Roller, 19 ... Arm, 20 ... Operating piece, 22 ... Casing, 2
6... Drive device, 29... Notch, 30... Support plate, 33... Bolt, 35... Cylinder.

Claims (1)

[Scope of utility model registration request] This is a device that uses a rotating roller to press the vertical outer edge of a circular inner lid provided on the top plate of a drum toward the center of the drum and press it against the curled part of the top plate to seal it. A presser plate to be press-fixed from above is rotatably supported, and is held at the tip of a rotating shaft that can be vertically raised and lowered, and a horizontal support plate fixed to the rotating shaft as a fulcrum, and the lower part of the fulcrum is attached to the rotating shaft. A roller that can be tilted toward the direction and is freely rotatable is pivotally supported at the lower end, and a plurality of arms that are normally biased so that the lower end opens outward, and a roller that slides on the rotary shaft that is pivotally supported. A truncated cone-shaped operating piece that can be raised and lowered slightly and whose outer side surface expands upward; it is in slidable contact with the rotating shaft and is arranged so as to surround the arm and the operating piece from the outside, and the upper part thereof is a cylinder. The casing is connected to the rod of
An intermediate support plate is fixed to the casing and is arranged to be in slidable contact with the upper part of the operating top so as to press the operating top downward, and when the casing is lowered by a cylinder, the When the operating top is lowered, its side surface presses the upper end of the arm outward, and a roller at the lower end of the arm presses the outer edge of the inner lid of the drum to the curled portion of the top plate. Tightening machine for inner lids of drums.