JP2011148520A - Pail open can - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pail open can which has no possibility of losing restoring force as a whole packing intervening between a canopy and a can body even when a large weight load by stacking-up into stages is applied, can sufficiently exhibit an original sealing force based on the elasticity of the material of the packing, and can surely prevent a content from leaking and deterioration caused by breakage of air-tightness. <P>SOLUTION: The pail open can P1 includes: a can body 1 with an approximately vertical cylindrical shape with a peripheral edge 11 of an upper end opening curved outward; the canopy 2A having an annular protruding part 23 with the lower surface side as a packing storing channel 22 on the peripheral edge; and canopy fixing means 3 for fixing the canopy 2A covering the upper end opening of the can body 1 and the can body 1 under a tightly sealed condition. In this pail open can P1, on the top part of the annular protruding part 23 of the canopy 2A, locally dented parts 5 are formed on a plurality of circumferential positions, and respective locally dented parts 5 are embedded into a packing 4 as protruding parts 6 on a packing arranging channel 22 side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pail open can widely used as a canopy container for liquid products such as fuel oil, lubricating oil, paint, ink, solvent, adhesive, and cooking oil.

  Generally, as shown in FIGS. 5 (a) and 5 (b), for example, a pail open can has a substantially disc-shaped canopy 2A at the upper end opening of a substantially vertical cylindrical can body 1 and a fastening band having a U-shaped cross section. A band-type pail open can P1 that is sealed and fixed via 3 and a substantially disc-shaped canopy 2B at the upper end opening of a similar can body 1 as shown in FIGS. 6 (a) and 6 (b). It is roughly classified into a lag type pail open can P2 that is sealed and fixed via a lug 21-.

  Both the pail open cans P1 and P2 have an annular bulge in which the peripheral edge of the upper end opening of the can body 1 is bent outward to form the curled portion 11, while the peripheral edges of the canopies 2A and 2B are the packing arrangement grooves 22 on the lower surface side. A portion 23 is formed, and the peripheral portions of the canopies 2A and 2B and the can body 1 are fitted through the packing 4 arranged in the packing arrangement groove 22 of the canopies 2A and 2B. In the band-type pail open can P1, the tightening band 3 is wound around the fitting portion between the peripheral portions, and in the lag type pail open can P2, the lug 21 on the peripheral edge of the canopy 2B is attached to the can body 1. The canopies 2 </ b> A and 2 </ b> B are fixed to the can body 1 by crimping and curling the curled portion 11 to the lower side.

  5 (a) and 6 (a), reference numeral 12 denotes a vine-shaped handle, and both ends thereof are fitted and locked to ear portions 13 and 13 fixed to both radial sides of the upper outer periphery of the can body 1. By doing so, it is pivotally attached to the can body 1 so as to be rotatable up and down. Moreover, in Fig.6 (a), 24 is a spout with the tongue 24a provided in the canopy 2B.

  These pail open cans P1 and P2 are often stacked in a plurality of upper and lower stages (generally up to about 8 stages via a pallet) for storage and transportation, etc. Therefore, the lower end side of the can body 1 is slightly reduced in diameter and canopy. It can be fitted inside the annular ridges 23 of 2A and 2B. However, as the lower pail open cans in the stacked state, the packing 4 interposed between the canopies 2A and 2B and the can body 1 is strongly compressed by the weight load of the upper pail open can and loses its restoring force. Even if the weight load is removed, the original sealing force based on the material elasticity of the packing 4 cannot be fully exhibited, and there is a problem that the contents are easily leaked or the contents are easily deteriorated due to airtight destruction.

  Therefore, for a pail open can that uses a lever-type tightening band in particular, a projecting portion that protrudes toward the packing side as an annular stepped portion from the position close to the inside of the canopy of the annular ridge portion of the canopy (Patent Document 1), By providing an annular convex part that protrudes from the canopy side to the packing arrangement part, or by embedding a wire in a ring shape in the packing (Patent Document 2), the weight load applied to the canopy during stacking is applied to the protruding part and the load transmission part. It has been proposed that the can body is received at the position of this position to suppress a reduction in sealing force due to compression of the packing.

JP 2000-177765 A JP 2000-309365 A

  However, in the proposed structure, the thin-walled portion of the packing is continuous in the circumferential direction due to the annular protrusions and the load transmitting portion. When a heavy load is applied, the thin continuous portion in the circumferential direction is strongly compressed and completely loses its restoring force, resulting in a further decrease in sealing performance. There is also concern that it will tear inside and outside, leading to airtight destruction.

  In view of the above circumstances, the present invention, as a pail open can, even if a heavy weight load due to stacking is applied, the entire packing interposed between the canopy and the can body does not lose its restoring force, There is no concern about the tearing of the packing, and even when the weight load is removed, the original sealing force based on the material elasticity of the packing can be fully exerted, and the contents can be reliably prevented from being deteriorated due to leakage or hermetic failure. The purpose is to provide.

  If the means for achieving the above object is shown with reference numerals in the drawings, the invention of claim 1 is a canister having a substantially vertical cylindrical shape in which the peripheral edge (curl portion 11) of the upper end opening is bent outward. The canopy 2A, 2B having the main body 1, the annular ridges 23 having the lower surface side of the packing housing groove 22 on the periphery, and the canopies 2A, 2B covering the upper end opening of the can main body 1 are sealed with respect to the can main body 1 In the pail open cans P1 and P2 provided with a canopy fixing means (tightening band 3, lug 21) for fixing to the top of the annular ridges 23 of the canopies 2A and 2B, local recesses 5 are provided at a plurality of locations in the circumferential direction. Each of the local recesses 5 is formed as a projection 6 on the packing arrangement groove 22 side and is embedded in the packing 4.

  According to a second aspect of the present invention, in the pail open cans P1 and P2 of the first aspect, the protrusion 6 has a base width W1 in the canopy radial direction of 50 to 70% of the width W2 of the packing 4, and the canopy with respect to the base width W1. The length L in the circumferential direction is 2 to 5 times.

  According to a third aspect of the present invention, in the pail open can 1 or P2 of the first or second aspect, the protrusion 6 is configured such that the tip 6a forms a flat surface along the direction of the canopy main surface 20.

  According to a fourth aspect of the present invention, in the pail open cans 1 and P2 of the first to third aspects, the local recesses 5 are formed at 6 to 10 locations in the canopy circumferential direction.

  In the pail open cans 1 and 2 according to the invention of claim 1, the local recesses 5 formed on the tops of the annular ridges 23 of the canopies 2 </ b> A and 2 </ b> B are formed on the packing 4 as protrusions 6 on the packing arrangement groove 22 side. The packing 4 is thinned at the embedding position, but the thinned portion is local and not continuous, so that the sealing performance does not deteriorate in a normal state. And even if a large weight load is applied to the canopies 2A, 2B by stacking cans, the weight load is received by the can body 1 at the positions of the projections 6 of the canopies 2A, 2B, and the packing 4 as a whole Since the compression in the vertical direction remains slightly, the packing 4 is surely restored to its original state as the weight load is removed, and the original sealing force based on the material elasticity is sufficiently exerted. Deterioration due to leakage of contents and airtight destruction is reliably prevented. That is, even if the packing 4 is strongly compressed by the above-described weight load at the position of each projection 6 and loses its restoring force, the lost part is local and does not lead to the circumferential direction or the width direction, Since it is maintained in a compressible state that can be restored to its original shape, and even if it is torn at the position of each projection 6 with an excessive weight load, its periphery is surrounded by a resilient packing layer, Sufficient sealing performance is maintained.

  According to the second aspect of the present invention, since the base width W1 of the protrusion 6 and the length L in the circumferential direction of the canopy and the width W2 of the packing 4 are in specific ratios, it is possible to more reliably reduce the sealing performance due to stacking or the like. While being able to prevent, the deformation | transformation of the opening edge part of the can main body 1 by concentration of a weight load can be avoided.

  According to the invention of claim 3, since the tip 6a of the projection 6 forms a flat surface along the direction of the canopy main surface 20, the transmission of the weight load from the canopy 2A, 2B side to the can body 1 is ensured without deviation. In addition, since the weight load is evenly applied to the entire flat surface, the deformation of the opening edge of the can body 1 due to the local concentration of the weight load can be prevented.

  According to the invention of claim 4, since a specific number of the local recesses 5 are provided in the canopy circumferential direction, a weight load due to stacking or the like can be applied evenly to the can body 1.

The canopy in the band type pail open can which concerns on 1st embodiment of this invention is shown, (a) is a top view of a half part, (b) is a sectional arrow view of the XX line of (a). The canopy in the lag type pail open can which concerns on 2nd embodiment of this invention is shown, (a) is a top view of a half part, (b) is a cross-sectional arrow line view of the YY line of (a). It is a longitudinal cross-sectional view of the canopy fitting part in the pail open can of the first embodiment. It is a longitudinal cross-sectional view of the canopy fitting part in the pail open can of the second embodiment. The band type pail open can which applies this invention is shown, (a) is a perspective view of the whole, (b) is a longitudinal cross-sectional view of a canopy fitting part. The lug type pail open can which applies this invention is shown, (a) is a perspective view of the whole, (b) is a longitudinal cross-sectional view of a canopy fitting part.

  Hereinafter, a first embodiment in which the present invention is applied to a band-type pail open can and a second embodiment in which the present invention is applied to a lug-type pail open can will be specifically described with reference to the drawings. In addition, since the basic structure of both the pail open cans of 1st and 2nd embodiment is the same as the pail open cans P1 and P2 illustrated in above-mentioned FIG.5 and FIG.6, each component of this basic structure below. The same reference numerals are attached to and the description is omitted.

  As shown in FIGS. 1 (a) and 1 (b), a plurality of canopies 2A in the band-type pail open can P1 of the first embodiment are embossed at the top of the peripheral annular ridge 23 (six in the figure). The local recesses 5-are formed at predetermined intervals along the circumferential direction. Each local recess 5 constitutes a protrusion 6 on the packing disposition groove 22 side of the lower surface of the annular ridge 23, and the protrusion 6 is embedded in the packing 4 disposed in the packing disposition groove 22. In addition, each projection part 6 has comprised the flat surface where the front-end | tip 6a follows the canopy main surface 20 direction.

  In addition, the canopy 2B in the lug-type pail open can P2 of the second embodiment, as shown in FIGS. 2 (a) and 2 (b), is also at the top of the peripheral annular ridge 23 as in the first embodiment. A plurality of (six in the figure) local recesses 5 are formed at predetermined intervals along the circumferential direction, and each local recess 5 is formed on the packing disposition groove 22 side on the lower surface of the annular ridge 23. The protrusion 6 is embedded in the packing 4. In addition, a large number of lugs 21 with a cover open hole 21a for facilitating bending are provided on the outer peripheral edge of the annular raised portion 23 over the entire circumference, and the main surface 20 is recessed in an arc shape. A reinforcing rib 20a- is provided.

  And in the pail open can P1 of 1st embodiment, as shown in FIG.3 and FIG.5 (a) (b), on the curl part 11 bent outwardly which makes the periphery of the upper end opening of the can main body 1 The annular ridge 23 on the peripheral edge of the canopy 2A is fitted through the packing 4 arranged in the packing arrangement groove 22 on the lower surface side, and the tightening band 3 is wound around the fitting part between the peripheral parts. The canopy 2A is sealed and fixed to the can body 1. Further, in the pail open can P2 of the second embodiment, as shown in FIGS. 4 and 6A and 6B, similarly, an annular ridge at the periphery of the canopy 2B is placed on the curled portion 11 at the periphery of the opening of the can body 1. The canopy 2B is attached to the can body 1 by fitting the portion 23 through the packing 4 and crimping the lug 21- on the periphery of the canopy 2B to the lower side of the curled portion 11 of the can body 1 And fix it.

  In the pail open cans P1 and P2 of the first and second embodiments, as shown in FIG. 3 and FIG. 5, in each of the local concave portions 5 of the annular ridge portion 23 in the sealing and fixing state of the canopies 2A and 2B, The packing 4 is thinned by the protruding portion 6 protruding to the lower surface side. However, the packing 4 is not thinned as shown in FIGS. 5 (b) and 6 (b) except for the local recessed portion 5, and the thinned portion is local, and the circumferential direction and the width direction are not. Since it does not continue, the sealing performance does not deteriorate in a normal state.

  On the other hand, when these pail open cans P1 and P2 are stored and transported, when stacked in a plurality of stages, the lower can is loaded with the weight of the upper can, but the weight load is the canopy 2A, 2B. These can be received by the can body 1 at the positions of the projections 6, and the compression of the packing 4 as a whole is limited to a small range in which the thin packing layer 6 a under the projections 6 can be compressed. Therefore, when the weight load is removed, the packing 4 is surely restored to the original state as a whole, and the original sealing force based on the elasticity of the material is sufficiently exhibited. Alteration due to hermetic failure is reliably prevented. That is, in the packing 4, even if the thin packing layer 6a under each protrusion 6 is strongly compressed by weight load and the restoring force is lost, the lost portion is local and does not lead to the circumferential direction or the width direction. Even if the thin packing layer 6a under the projection 6 is broken under an excessive weight load, the periphery is surrounded by a packing layer having a restoring force. Therefore, sufficient sealing performance is maintained.

  Here, as the protrusions 6 of the canopies 2A and 2B, the base width W1 in the canopy radial direction is about 50 to 70% of the width W2 of the packing 4, and the length L in the canopy circumferential direction with respect to the base width W1 is 2 to 5. It is preferable that it is about twice. If the base width W1 is too large with respect to the width W2 of the packing 4 or the length L is too long, sealing is performed as the packing area where the restoring force is lost due to weight load due to can stacking becomes excessive. It becomes easy to cause the fall of power. Conversely, if the base width W1 is too small with respect to the width W2 of the packing 4 or the length L is too short, the curled portion 11 of the can body 1 is deformed due to concentration of weight load due to can stacking or the like. It becomes easy.

  Further, in the present invention, the tip 6a of the projection 6 can be set in various shapes, but it is recommended that it be a flat surface along the direction of the canopy main surface 20 as in the embodiment. That is, when the tip 6a of the protrusion 6 has a sharp shape, when the tip 6a deviates from the top position of the curled portion 11 of the can main body 1 for some reason, a weight load due to can stacking or the like is applied to the curled portion 11. The curled portion 11 is deformed inwardly or outwardly due to the component force, or even when there is no positional displacement, the curled portion 11 is deformed so as to be recessed due to local concentration of heavy load. There are concerns. However, if the tip 6a of the projection 6 is a flat surface, the transmission of the weight load from the canopy 2A, 2B side to the can body can be made without deviation, and the weight load is equally applied to the entire flat surface. Therefore, deformation of the curled portion can be prevented.

  Further, the local recesses 5 provided in the protrusions 6, that is, the annular ridges 23, need to be equally distributed at least at three locations in the circumferential direction of the canopy in order to uniformly apply a weight load due to stacking or the like to the can body 1. However, in particular, it is preferable that the number is about 6 to 10 from the viewpoint of dispersion of weighted load and relaxation of position accuracy. Thus, when providing the local recessed part 5 in about 6-10 places of the canopy circumferential direction, the fastening position by the lever and the bolt of the fastening band 3 and the spout 24 of the canopy are not necessarily made uniform. Depending on the position of the seam welded portion of the can body 1 or the like, the local concave portion 5 may be arranged and set so as to reduce the load applied to a part that is empirically deformed or seal-destructed.

  In the pail open can of the present invention, the detailed shape of the can body 1 and the canopy 2, the means for fixing the canopy 2 to the can body 1, the structure of the accessory parts such as the spout 24 and the handle 12, and the fastening of the fastening band In addition to the embodiment, various design changes can be made to the detailed configuration such as the system.

1 can body 11 curl (periphery of upper end opening)
2A, 2B Canopy 20 Canopy main surface 21 Lug (canopy fixing means)
22 packing receiving groove 23 annular ridge 3 tightening band (canopy fixing means)
4 Packing 5 Local recess 6 Projection 6a Tip L Length of projection in the canopy circumferential direction P1, P2 Pale open can W1 Base width of projection W2 Packing width

Claims (4)

A can body having a substantially vertical cylindrical shape whose periphery of the upper end opening is bent outward, a canopy having an annular ridge having a packing receiving groove on the lower surface on the periphery, and a canopy covering the upper end opening of the can body In a pail open can provided with a canopy fixing means for fixing to a can body in a sealed state,
The top of the annular ridge portion of the canopy is formed with a plurality of local recesses in the circumferential direction, and each local recess is embedded in the packing as a protrusion on the packing arrangement groove side. Pail open can.   The pail open can according to claim 1, wherein the protrusion has a base width in the canopy radial direction of 50 to 70% of the width of the packing and a length in the canopy circumferential direction with respect to the base width is 2 to 5 times.   The pail open can according to claim 1 or 2, wherein the protrusion has a flat surface whose tip is in the main canopy surface direction.   The pail open can according to any one of claims 1 to 3, wherein the local recesses are formed in 6 to 10 locations in the circumferential direction of the canopy.

Images