JPS62208367A - Thermoplastic clamp ring - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a split ring-shaped thermoplastic clamp ring with a U-shaped cross section for tightening and fixing a lid of a container.
A clamp lever is pivotally disposed at one end thereof, and a clamping member is piped at the other end to a thermoplastic clamp ring which is also pivotally disposed and is pivotally held on the side wall of the clamp lever.

[Conventional technology]

A thermoplastic clamping ring of this type is known from DE 25 24 631 A1. Such a thermoplastic clamp ring is clamped circumferentially after being placed over the opposing flanges of the container and lid, with these seven flanges being clamped inside the grooved shape of the clamp ring and drawn together. to secure the container lid to the container. In order to ensure that the clamping action does not loosen, not only is a high strength required in the circumferential direction, but also the grooved shape of the thermoplastic clamping ring does not widen, so that the respective flanges of the container and lid are aligned with each other. To ensure a firm hold, the grooved shape of the thermoplastic clamp ring must provide great durability.

A steel clamping ring reinforced with a corrugated plate shape is known from French Patent Application No. 2,261,197. However, such a corrugated plate shape cannot be used for thermoplastic clamp rings.

Such thermoplastic clamp rings have lower strength than steel clamp rings. Nevertheless, if a simple steel ring or a plated or heat-treated steel clamp ring cannot be used due to corrosion or hygiene concerns, a thermoplastic clamp ring is required. In order to obtain the same strength as the m-made clamp ring, the thermoplastic clamp ring is
As calculated, it is necessary to make the thickness 8, which is at least several times the thickness of the tonal clamp ring. This is the material d″jj
It is less expensive and increases the price of thermoplastic clamp rings accordingly. A stable connection without play between the hinge part and the thermoplastic clamp ring is difficult.

[Problem that the invention seeks to solve]

The object of the invention is to produce a thermoplastic clamping ring that has the same strength as a steel clamping ring, with as little thickness as possible and therefore less material. Furthermore, it is an object of the present invention to provide a reliable hinge connection between the clamp lever and the clamp member, and between them and the thermoplastic clamp ring, without play, without the need for rivets, and without galling.

[Means for solving problems]

According to the invention, this object is achieved by providing on the outer surface of the thermoplastic clamping ring a number of circumferentially distributed reinforcing ribs oriented parallel to its axis, and furthermore at the edges of the thermoplastic clamping ring. At both ends of the thermoplastic clamp ring, hook-shaped shackles receive the hinge pins of the clamp member or clamp lever, and the clamp member and the clamp lever shale on their side walls. This is achieved by covering the sides of the

The present invention differs from the prior art in that the walls of the thermoplastic clamp ring itself are very thin. For the same strength, the wall thickness is approximately the same or only slightly larger than that of an F14 clamp ring.

The necessary strength is ensured by the reinforcing ribs and the annular bulge C.

Because of this great strength, the thermoplastic clamp ring deforms little under load, so it can be used in place of the N4 clamp ring without any problems.

This has been confirmed by experiment. The connection between the clamp lever and the clamp member and the connection between these and both ends of the thermoplastic clamp ring can be made without rivets, which also improves the handling of the thermoplastic clamp ring. The thermoplastic clamping ring slides with low friction over the respective plastic flanges of the container and container lid. This makes the thermoplastic clamping ring very easy to handle. The side walls act as a cover to prevent galling and ensure a high torsional strength of the clamp connection.

In order to reduce the amount of material consumed and increase the strength, it is proposed to form the reinforcing ribs as flat webs.

The shape of the reinforcing ribs can be varied within the scope of the objectives of the invention. The number of reinforcing ribs can also be adapted to the particular application. However, it is important that the reinforcing ribs increase the axial strength of the thermoplastic clamping ring to the required value.

The torsional strength of the clamp connection is further increased, and the clamp lever
In order to guide the closing body during closing, it is proposed that the clamping member covers the clamping lever and the thermoplastic clamping ring with its side walls, and that its hinge pin fits into a bearing slot in the side wall of the clamping lever.

〔Example〕

Embodiments of the present invention shown in the drawings will be described in detail below.

FIG. 1 shows a thermoplastic clamping ring 1 in plan view before it is placed over a container. As is clear from FIG. 5, this thermoplastic clamp ring 1 has a cross-section that is parallel to a shaped member 2 having a square shape. This U-shape 442 is open toward the axis of the thermoplastic clamp ring 1 . Annular bulges 10 are formed on both side edges of the 0-shaped member 2, each facing outward.

A plurality of flat wear-shaped reinforcing ribs 3 are provided on the outer surface of the thermoplastic clamp ring 1, and these ribs extend parallel to the axis of the thermoplastic clamp ring 1 and extend along the outer surface of the O-shaped member 2. It surrounds the whole thing. The reinforcing ribs 3 transition into an annular bulge 4, so that a lattice-like reinforcing structure is created. The reinforcing ribs 3 are located J3 in the edge area of the thermoplastic clamping ring 1 and are thick-walled to ensure great strength.

The shape and especially the contour as well as the number of reinforcing ribs 3 must be determined with respect to the desired strength. Of course, the shape can be changed from side to side.

The reinforcing ribs 3 increase the strength of the thermoplastic clamp ring 1. In particular, the strength in the direction of the axis of the thermoplastic clamp ring 1 is increased, thereby preventing the flange of the O-shaped member 2 from opening.

Only a few reinforcing ribs 3 are shown in FIG. The reinforcing ribs 3 are distributed around the entire circumference of the thermoplastic clamp 1 in a corresponding manner as indicated by the dash-dotted lines 6.

The thermoplastic clamp is integrally injection molded in the shape shown in FIG. There are hook-shaped holes on both ends of the thermoplastic clamp 1, respectively. Tsukuru io and 1i are attached. Each shackle 10 , 11 is hook-shaped, with the hook opening facing away from the corresponding end of the thermoplastic clamp 1 . The shackle 10.11 has a width that corresponds approximately to the width of the rear side of the thermoplastic clamping ring 1.

Furthermore, near the end of the thermoplastic clamping ring 1 a projection 12 with a slit 13 is provided. The slit 13 is used for accommodating a stop plate.

The clamping lever 14 has a substantially U-shaped cross section, the two side walls 15 of which are connected to the rear wall 16r. The rear wall 16 similarly reinforces the clamp lever 14.
It has a grooved shape to prevent A hinge pin 17 is formed between the side walls 15 and fits into the receiver of the shackle 11. Since the receiving part of the shackle 11 is on the right side of the cut-off recess, the hinge pin 17 can fit into the receiving part of the shackle 11. Furthermore, a bearing slit 1 is provided in the side wall 15.
8, the receptacle of which likewise has a cutout recess. The side wall 15 also has on its right a through opening 19 which coincides with the slit 13, so that in the closed position in FIG.

Furthermore, a clamping element 7 is provided, which consists of oppositely located side walls 8 and a rear wall 9. Both ends have both sides! A hinge pin 20.21 is formed between 28. The hinge pin 20 is fitted into the receiving part of the shackle 10. The hinge pin 21 is a bearing slin 1-18
, in which case the cut-out recess of the bearing slot 18 ensures a firm hold.

In the area of the hinge pin 20, the side wall 8 has a relative spacing that approximately corresponds to the outer width of the thermoplastic clamping ring 1. The side wall 8 then follows an end piece 22 which, as can be seen in particular from FIGS. 3 J3 and 4, has a large relative spacing corresponding to the outer width of the clamping lever 14. .

This shape allows, on the one hand, a tight guidance of the clamp flap 14 and the clamping member 7 when closing the closure, and, on the other hand, a lateral guidance of the ends of the clamping ring 1. As a result, in the rJI chain state shown in FIGS. 2 and 3, both ends of the thermoplastic clamp ring 1 are joined together in the axial direction by closing the clamp lever 14,
No galling occurs in this range. This is r111
00 strength and is very important to its function.

The thermoplastic clamp ring 1, clamp lever 14, and clamp member 7 are injection molded products of thermoplastic resin. These parts are joined to each other by fitting each hinge pin into the shackle as described above. In the open state in FIG. 1, the thermoplastic clamping ring 1 together with the closure forms a handling unit that can be placed on the container.

After covering the container, the clamp lever 14 is swung clockwise. This causes the thermoplastic clamping ring 1 to be pulled circumferentially into the closed position shown in FIG. 2, clamping the container lid onto the container. At that time, the amount is 251.
The V and the respective 7 flanges or edges of the container are clamped together between the flanges of the thermoplastic clamp ring 1. The reinforcing ribs 3 ensure great strength so that the clamp ring 1 does not open up. This maintains the tightening action. Calculations and calculations have shown that the above-described formation of the thermoplastic clamping ring 1 ensures an increased strength due to the reinforcing ribs 3, and that the thickness of the U-shaped material only needs to be slightly increased compared to the steel clamping ring. Confirmed by experiment. The closure contributes to strength and anti-galling by lateral guidance of the side walls.

[Brief explanation of drawings]

The first example and FIG. 2 are plan views of the thermoplastic clamp ring according to the invention in the open and closed states, respectively, FIG. 3 is a partial view seen in the direction of the arrow ■ in FIG. 2, and FIG. 3 is a cross-sectional view taken along line IV--IV in FIG. 3, and FIG. 5 is a cross-sectional view taken along line v--v in FIG. 1... Thermoplastic clamp ring, 2... U-shaped member,
3... Reinforcement rib, 4... Annular bulge, 7... Clamp member, 8... Side wall, 10.11... Shackle, 14... Clamp lever 115... Side wall, 17・
...Hinge pin, 18...Bearing slit, 20.21
...Hinge pin.

Claims (1)

[Claims] 1. A split ring-shaped thermoplastic clamp ring with a U-shaped cross section for tightening and fixing the lid of a container, the clamp ring being swingably disposed at one end of the clamp ring and the clamp ring being swingably disposed at the other end. In a thermoplastic clamp ring in which a clamp member is swingably disposed and swingably held on a side wall of a clamp lever, an outer surface of the thermoplastic clamp ring (1) includes:
A number of reinforcing ribs (3) oriented parallel to its axis and distributed in the circumferential direction are provided, further reinforcing ribs (3) transitioning to the edges of the thermo-flexible clamping ring (1). An annular bulge (4) is provided and a thermoplastic clamp ring (1) is provided.
) have hook-shaped shackles (1
0, 11) receive the hinge pins (20, 17) of the clamp member (7) or clamp lever (14), and the clamp member (7) and clamp lever (14) engage the shackle (10) with their side walls (8 to 15). , 11) A thermoplastic clamp ring characterized in that it covers the sides of. 2. Thermoplastic clamping ring according to claim 1, characterized in that the reinforcing rib (3) is designed as a flat web. 3. The clamping member (7) covers the clamping lever (14) and the thermoplastic clamping ring (1) with its side wall (8), and its hinge pin (21) covers the clamping lever (14)
Claim 1 or 2, characterized in that the bearing slit (18) is fitted into the side wall (15) of the
Thermoplastic clamping ring as described in section.