JP2010111396A - Synthetic resin-made container with handle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin-made container with a handle capable of increasing strength while securing light weight and easy manufacturing performance, and capable of substantially preventing deformation or buckling even if a load in the axial direction is applied in an empty state or in a state of being filled with contents. <P>SOLUTION: In the synthetic resin-made container with the handle, a barrel of a container body is divided into upper and lower barrels in a circumferential groove, and the handle is fitted to a recessed part formed at the upper barrel. Recesses are formed at the circumferential groove at parts located at right and left sides of the handle. When the load in the axial direction is applied to the container body which is empty or filled with the contents, the circumferential groove in an area below the handle, in particular, a circumferential area of 15-75° from immediately below the center axis of the handle is outwardly and projectingly deformed. The recess is outwardly and projectingly deformed, and the shape of the circumferential groove is not changed as a whole. Furthermore, the strength of the circumferential groove below the handle also keeps a state before the application of the load. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a synthetic resin container with a handle that reduces weight and prevents deformation and buckling associated therewith, and more specifically, even if an axial load is applied to the synthetic resin container with a handle, The present invention relates to a synthetic resin container with a handle that can achieve weight reduction without causing deformation or buckling in a portion of a circumferential groove located directly under the axis of the handle.

Synthetic resin containers with a handle have a shape in which a handle is formed in a recessed portion of the container body, and are widely used for containing a large amount of liquid contents such as beverages, alcoholic beverages, oils, and seasonings. The reason is that it is heavy because there are many liquid contents, and it is difficult to hold a container without a handle. This synthetic resin container with a handle has been reduced in weight due to demands for cost reduction, resource saving, and environmental conservation, and as a result, various measures are taken to reduce the thickness and avoid strength reduction. As shown in FIGS. 6 and 7, a conventional synthetic resin container with a handle has a mouth 50, a shoulder 51,
A container body 54 is formed by the body portion 52 and the bottom portion 53, and the body portion 52 of the container body 54 is connected to the circumferential groove 55.
The upper trunk portion 56 and the lower trunk portion 57 are divided into the upper trunk portion 56 and the concave portion 58 provided in the upper trunk portion 56 with a handle 59.
Is formed.

Since the synthetic resin container with a handle has a shape in which a handle 59 is formed in a recessed portion 58 provided in the upper body portion 56, it is important to maintain the strength of the body portion 52 under the handle 59. That is, the synthetic resin containers with handles are loaded in the axial direction when they are piled up in an empty state or filled with contents during transportation or the like, so that a load is applied in the axial direction. The circumferential groove 55 separated by about 45 degrees in the circumferential direction on both sides is subjected to the strongest convex deformation force. When this part is convex outward deformation, the strength of the circumferential groove 55 directly below the handle 59 is weakened, and the worst seat Will yield. The quickest way to deal with this is to thicken the buckled part. However, this cannot reduce the weight. For this reason, the following things are known as a synthetic resin container with a handle in which weight reduction and the above-mentioned deformation and buckling do not occur.
JP 2002-29521 A JP 2001-315789 A JP-A-8-113243

As shown in FIGS. 8 and 9, the synthetic resin container with a handle of Patent Document 1 has a trunk portion 5 of the container body 54.
A plurality of annular groove portions 60 are provided on the peripheral surface below the two grips 59, and the depth M of these annular groove portions 60 is gradually increased toward the center portion A of the handle 59 and the center portion B on the side opposite to the handle. (M1 <M2). As a result, even if an axial load is applied to an empty synthetic resin container with a handle,
The shallowest part of the annular groove 60, that is, the direction of deformation in the circumferential direction of the weakest center part A and center part B is convex outward, so that it cannot be the starting point of buckling, and the wall thickness is increased. Even without it, buckling will not occur.

  As shown in FIG. 10, the synthetic resin container with a handle of Patent Document 2 has a pair of left and right recessed wall plate portions 62 between an inclined wall surface 61 below a handle 59 attached to a recessed portion 58 of the trunk portion 52. The longitudinal beam wall portion 63 is formed to remain. Thus, the vertical beam wall 63 has a strong beam function, and mainly prevents the occurrence of the depression deformation of the inclined wall surface 61 under the handle 59 due to the decompression in the container.

  As shown in FIG. 11, the synthetic resin container with a handle of Patent Document 3 forms a circumferential concave rib 64 continuously at the lower end of the concave portion 58 of the trunk portion 52, and is adjacent to the bottom of the concave rib 64. Thus, the convex rib 65 is formed, and the concave and convex surface 66 is formed on the concave rib 64 positioned under the handle 59. As a result, the stress applied to the concave rib 64 positioned under the handle 59 is dispersed by the concave and convex surface 66, and the effect of the reinforcing rib is produced, so that deformation and buckling do not occur.

The synthetic resin container with a handle disclosed in Patent Document 1 can balance the concave deformation and the convex deformation even when a load is applied in the axial direction, and can prevent deformation buckling as a whole. Since the handle 59 is integrally formed with respect to deformation in the form of indentation and further buckling of the part, it is considered that the recessed part 58 and its peripheral part originally have high strength because of its shape. No response has been made.

Although the synthetic resin container with a handle described in Patent Document 2 can surely prevent the deformation of the inclined wall surface 61 under the handle 59 due to the decompression in the container, a load is applied in the axial direction, and the trunk under the handle 59 52, the effect is unknown for the deformation and buckling in the form in which 52 is depressed, that is, the occurrence of the depression deformation of the inclined wall surface 61 under the handle 59, and in addition, the vertical beam wall portion with a pair of left and right depression wall plate portions 62 The presence of 63 complicates the shape, and the mold configuration becomes complicated.

The synthetic resin container with a handle disclosed in Patent Document 3 is loaded in the axial direction.
9 Even if stress is applied to the lower concave rib 64, it is dispersed by the uneven surface 66 and the effect of the reinforcing rib is generated, so that deformation buckling does not occur, but the body 52 below the handle 59 is deformed. For the buckling, it is necessary to form the concave rib 64 and the convex rib 65 adjacent to the concave rib 64, and to provide the concave and convex surface 66 on the concave rib 64, which is complicated as a whole.
Thus, the synthetic resin containers with handles disclosed in the above-mentioned patent documents have problems with respect to deformation and buckling.

Therefore, the object of the present invention is to increase the strength by slightly changing the shape while ensuring the light weight, even if an axial load is applied in an empty state or in a state where the contents are filled during transportation or the like. An object of the present invention is to provide a synthetic resin container with a handle that is hardly deformed or buckled.

The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, the body part of the container body is divided into an upper body part and a lower body part by a circumferential groove,
A synthetic resin container with a handle, in which a handle is attached to a recessed portion provided in the upper body portion, wherein a concave portion is provided in the circumferential groove in a portion located on the left and right of the handle. A container is provided.

  Further, according to the present invention, there is provided the above synthetic resin container with a handle, wherein the concave portion is provided in a region of 15 degrees to 75 degrees in a circumferential direction from directly below the shaft center with respect to the handle.

  Further, according to the present invention, the recess is made of a synthetic resin with a handle having a depth in the range of 0.8 to 2.3% with respect to the diameter of the circumferential groove inside the container body. A container is provided.

  In addition, according to the present invention, there is provided the above synthetic resin container with a handle, wherein a cross-sectional shape in the longitudinal direction of the dent portion becomes deeper toward the vicinity of the central portion of the dent portion.

  In addition, according to the present invention, there is provided the above synthetic resin container with a handle, wherein the radius of the curve connecting the start point, the center point and the end point of the recess is larger than the radius of the container main body circumferential groove.

  Moreover, according to this invention, the said synthetic resin container with a handle in which the hollow was formed in the said upper trunk | drum part from right under the said handle to the said circumferential groove is provided.

  Further, according to the present invention, there is provided the above synthetic resin container with a handle, wherein the recess is narrower than the width of the handle and has a depth in the range of 1 to 2 mm inside the container body.

  Moreover, according to this invention, the cross-sectional shape of the said hollow is a saddle-shaped synthetic resin container with a handle.

  According to the present invention, when an axial load is applied to the synthetic resin container body with a handle in an empty state or a state filled with contents, the circumferential groove, in particular, from the portion of the circumferential groove immediately below the handle in the circumferential direction. The circumferential groove in the region of 15 to 75 degrees tends to protrude outward, but since it is protruded outward in advance, the shape of the circumferential groove changes because it is convex inward by the recess. In addition, the strength of the circumferential groove immediately below the handle can also maintain the state before the load is applied. Therefore, since the strength before the load is applied can be maintained by such a configuration, the strength is increased as a result, the light weight can be maintained, and an empty state or contents are filled during transportation. Even if an axial load is applied in the state, deformation and buckling hardly occur, and further, since only a slight shape change is required, there is an advantageous effect in terms of manufacturing and cost.

  Further, the synthetic resin container with a handle of the present invention is 15 degrees or less in the circumferential direction from the peripheral groove portion directly under the handle when an axial load is applied to the container body that is empty or filled with contents. The circumferential groove in the region of 75 degrees protrudes outwardly in the range of 0.8 to 2.3% with respect to the diameter of the circumferential groove and returns to its original shape. The original strength of the groove can be maintained. Therefore, the above-described effect can be obtained only by a simple design change in which a recess having a depth in the range of 0.8 to 2.3% with respect to the diameter of the peripheral groove is provided in the peripheral groove.

  In addition, the synthetic resin container with a handle of the present invention is such that the cross-sectional shape in the longitudinal direction of the recess is gradually shallower as it goes to the end side, so that the mold can be smoothly removed after molding, In addition to the above effect, there is an effect that the fabrication becomes easy.

  In addition, the synthetic resin container with a handle of the present invention has an advantage that the strength of the portion of the circumferential groove just below the handle is increased by the amount of the depression. Therefore, in addition to the above-described effects, there is an effect that deformation and buckling do not occur further in combination with the recessed portion provided in the circumferential groove.

  Further, in the present invention, a synthetic resin container with a handle that is similarly prevented from being deformed or buckled can be obtained by making the cross-sectional shape of the depression into a bowl shape, so that the shape is simple and the mold is molded. After that, there is an effect that the die can be smoothly cut and the production becomes easy.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a synthetic resin container with a handle showing an embodiment of the present invention, and FIG. 2 is II-II in FIG.
3 is an enlarged cross-sectional view of a recess having a cross-sectional shape defined in claim 4, FIG. 4 is a cross-sectional view showing variations of the cross-sectional shape of the recess, and FIG. 5 is a synthetic resin with a handle in FIG. It is a side view of a container made.
In the drawing, a synthetic resin container 1 with a handle has a container body 6 formed of a mouth part 2, a shoulder part 3, a body part 4 and a bottom part 5 in order from the top, and the body part 4 of the container body 6 is formed into a circumferential groove 7. The upper body portion 4a and the lower body portion 4b are divided into two, and a handle 9 is formed in the recessed portion 8 provided in the upper body portion 4a, and a portion 7A of the circumferential groove 7 located directly below the axis of the handle 9 is formed. In the circumferential groove 7 in the region 7B of 15 to 75 degrees in the circumferential direction, at least one indentation 10 that protrudes inward of the container body 6 is provided.

The container body 6 is not particularly limited as long as the material is a resin that can be biaxially stretch blow-molded, but a polyester resin such as polyethylene terephthalate having transparency, gas barrier properties, impact resistance, and appropriate rigidity is used. Preferably used. A lid is screwed or fitted into the mouth portion 2 of the container body 6, and the container body 6 is opened and closed. The upper body 4 a of the container body 6 has the recessed portion 8 as described above, and a separate handle 9 is accommodated and attached to the recessed portion 8, and the handle 9 protrudes from the body 4. In addition, the fingers can be inserted into the handle 9 and the entire synthetic resin container 1 with the handle can be picked up. Further, a reinforcing ring groove 11 is provided in the lower body portion 4b. In addition to this, a plurality of reinforcing panels may be provided.

The circumferential groove 7 is provided at a substantially middle portion of the body 4 in the container body 6 and divides the body 4 into an upper body 4a and a lower body 4b. The circumferential groove 7 is provided with two recessed portions 10 that protrude inward of the container body 6. The recessed portion 10 is formed from a circumferential groove 7 (α−β) within a region 7B of 15 degrees (α) to 75 degrees (β) in the circumferential direction from a portion 7A of the circumferential groove 7 located immediately below the axis of the handle 9. ). The starting point of the dent is preferably 15 to 35 degrees, the center of the dent is 40 to 50 degrees, and the end of the dent is preferably 55 to 75 degrees.

The variation of the dent changes variously depending on the pressure applied to the container main body, the volume of the filling, and the like. As specific examples, eight forms are shown in FIGS. 4 (a) to (h). By looking at the relationship between α and β for each, it will be understood what kind of dent is formed at which position.
(A) shows a state in which the recessed portion has a concave rib shape, and (b) the bottom of the recessed rib in the recessed portion is concentric with the circumferential groove. (C) (d) has shown the state from which the range of a dent part has shifted | deviated delicately from the start point. (E) is a modification in which the center of the recess is deep, and (f) is a modification in which the center of the recess is shallow and the bottom of the recess is convex, and (g) (h) Is an example in which the deepest part of the recess is formed closer to the start point or end point, and (i) shows an example in which the recess is substantially linear.

  When an axial load is applied to the synthetic resin container 1 with a handle in an empty state or filled with contents, the circumferential groove 7 separated from the portion 7A of the circumferential groove 7 by about 45 degrees in both circumferential directions. In view of the fact that the force that causes the most outward convex deformation is applied to the vicinity of the 45 ° portion 7C, and the force that gradually protrudes and decreases as the distance from the force increases, the recessed portion 10 includes the 45 ° portion 7C of the circumferential groove 7. Is provided in the circumferential groove 7 in the region 7B so as to be convex most inward and gradually decrease the degree of convexity as it goes to both sides.

  Further, the depth of the recess 10 is, as a specific dimension, a convex in the range of 0.8 to 2.3% with respect to the diameter of the circumferential groove on the inner side of the container body 6. 7 45 degree part 7C should be most inwardly convex, and its size is selected within a range of 0.8 to 2.3% with respect to the diameter of the circumferential groove. As the distance increases, the degree of convexity gradually decreases inward, and finally becomes 0%. That is, the cross-sectional shape in the longitudinal direction of the recess 10 becomes deeper as it goes inward (in the above example, gradually changes from 0.8 to 2.3% with respect to the diameter of the circumferential groove). When the dent 10 is formed in this way, the dent 10 is inflated by the outwardly deforming force, becomes the original circular shape of the circumferential groove 7, and holds it to prevent buckling of the body 2 under the handle 9. In addition, after molding the synthetic resin container 1 with a handle, it is possible to obtain an effect of smooth die cutting.

  It can be seen that the cross-sectional shape of the recess 10 is such that the radius of the curve connecting the start point, the center point, and the end point of the recess is larger than the radius of the circumferential groove of the container body. That is, as shown in FIG. 3, the cross-sectional shape of the dent is 43 degrees from the lower part of the handle and 1.5 mm inward of the container and 25 degrees from the lower part of the handle. It is represented by a circle represented by a curve connecting the point (b) and the point (c) of 65 degrees from immediately below the handle. In this embodiment, the radius of this circle is about 80 mm. It is clear that the radius of the circumferential groove of the container body is larger than 48 mm.

  In addition, if this recessed part 10 is 0.80 or more with respect to the diameter of a circumferential groove inward of the container main body 6, the balance with the force which protrudes outwardly will be balanced, and the recessed part 10 will swell. The circumferential groove 7 has an original circular shape and is sufficiently held to prevent the body 2 under the handle 9 from buckling. On the other hand, if it exceeds 2.3%, the balance with the force that outwardly deforms is not achieved, the bulge of the dent 10 is not sufficient, and the circular shape of the circumferential groove 7 does not become the original shape. The effect of preventing bending is insufficient and the opposite effect is obtained. Furthermore, it becomes difficult to smoothly remove the mold after molding. From this viewpoint, the optimal inwardly convex dimension is 1.3 to 1.8% with respect to the diameter of the circumferential groove. Incidentally, the preferred size for a 1.8 L container is 1.2 to 1.7 mm.

  Further, FIG. 5 directly increases the strength so that the body portion 2 under the handle 9 does not buckle, and the concave portion 8 extending from just below the shaft center of the handle 9 to the circumferential groove 7 is inserted into the concave portion 8 of the handle 9. A recess 12 is formed which is narrower than the width dimension (W) and is convex in the range of 1 mm to 2 mm inside the container body 6.

  The cross-sectional shape of the recess 12 is not particularly limited. For example, the recess 12 is formed in a simple bowl shape, and its width dimension (W1) is narrower than the width dimension (W2) of the handle 9. Since the handle 9 is supported, the recess 12 increases the strength of the body portion 2 directly below the handle 9. Accordingly, in combination with the recess 10 provided in the circumferential groove 7 described above, the strength of the body 2 directly below the handle 9 is directly increased, and the portion is not further deformed or buckled. .

Next, since the test for demonstrating the superiority of the present invention was performed, it will be shown below.
<Test Example 1>
The synthetic resin container with a handle is for 1.8L, and the shape thereof is the same as that of the conventional example shown in FIG. 4, and the recess shown in FIG. 2 is provided in the circumferential groove shown in FIG. The maximum dent was 1.5 mm, and the circumferential groove was positioned from 25 degrees to 65 degrees in the circumferential direction from just below the handle axis. A load in the vertical direction was applied to an empty synthetic resin container with a test handle, and the longitudinal compressive strength was measured and the buckled portion was visually observed. In addition, three synthetic resin containers with a handle for a test were prepared, and the longitudinal compression strength was measured and the buckling sites were visually observed for all of them. The test is performed by compressing an empty synthetic resin container with a handle for testing at 50 mm / min, 23 ° C. using a tensile and compression tester (manufactured by Imada Manufacturing Co., Ltd., SV-201NA-H special model). The maximum value obtained was taken as the longitudinal compression strength.

<Comparative example 1>
In the same manner as in Test Example 1, a load in the vertical direction was applied to the synthetic resin container with a handle for testing in Test Example 1 except for the indentation, and the longitudinal compressive strength was measured and the buckling site was visually observed. .
The test results are shown in Table 1.

According to Table 1, the average value of the longitudinal compression strength of Test Example 1 of the present invention is 276.3N, while the average value of the longitudinal compression strength of Comparative Example 1 is 227.7N, and the difference is 276. .3N-227.
7N = 48.6N, which clearly demonstrated the superiority of the present invention.

As mentioned above, although Example 1 of this invention was demonstrated, a specific structure is not limited to this, It is applicable even if the inside of a container is a pressurized state, The change in the range which does not deviate from the summary of this invention It should be understood that is possible as appropriate.

  The synthetic resin container with a handle of the present invention is almost free from deformation and buckling even when an axial load is applied in an empty state or a state filled with contents while ensuring lightness and ease of manufacture. When it is desired not to occur, the availability becomes extremely high.

It is a front view of a synthetic resin container with a handle showing an embodiment of the present invention. It is sectional drawing which follows the II-II line of FIG. It is the expanded sectional view which showed the cross-sectional shape of the dent part of the synthetic resin container with a handle of this invention by the comparison with the radius of a container main body circumferential groove. It is a state figure which shows the variation of the cross-sectional shape of the recessed part of the synthetic resin containers with a handle of this invention. It is a side view of the synthetic resin container with a handle of FIG. It is a side view which shows the synthetic resin containers with a handle of a prior art example. It is sectional drawing which follows the VV line of FIG. It is a front view which shows the synthetic resin container with a handle of a prior art example. It is sectional drawing which follows the VII-VII line of FIG. It is a side view which shows the synthetic resin containers with a handle of a prior art example. It is a perspective view which shows the synthetic resin container with a handle of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin container with a handle 2, 50 mouth part 3, 51 shoulder part 4, 52 trunk | drum 4a, 56 upper trunk | drum 4b, 57 lower trunk | drum 5, 53 bottom part 6, 54 container main body 7,55 circumferential groove 7A part 7B region 7C 45 degree part 8, 58 recessed part 9, 59 handle 10 recessed part 11 reinforcing ring groove 12 recessed 60 annular groove part 61 inclined wall surface 62 recessed wall plate part 63 longitudinal beam wall part 64 concave rib 65 convex rib 66 uneven surface

Claims (8)

  In the synthetic resin container with a handle, in which the body of the container body is divided into an upper body and a lower body by a circumferential groove, and a handle is attached to the recessed portion provided in the upper body, the position of the left and right of the handle A synthetic resin container with a handle, characterized in that a recess is provided in the circumferential groove of the part to be operated.   2. The synthetic resin container with a handle according to claim 1, wherein the recess is provided in a region of 15 to 75 degrees in a circumferential direction from directly below an axis of the handle.   The synthetic resin container with a handle according to claim 1 or 2, wherein the recess has a depth in a range of 0.8 to 2.3% with respect to a diameter of the circumferential groove inward of the container body.   3. The synthetic resin container with a handle according to claim 1, wherein a cross-sectional shape in a longitudinal direction of the dent portion becomes deeper toward a vicinity of a central portion of the dent portion. The synthetic resin container with a handle according to any one of claims 1 to 3, wherein a radius of a curve connecting a start point, a center point, and an end point of the recess is larger than a radius of a circumferential groove of the container body.   The synthetic resin container with a handle according to any one of claims 1 to 5, wherein a recess is formed in the upper body portion extending from directly under the handle to the circumferential groove.   The synthetic resin container with a handle according to claim 6, wherein the recess is narrower than a width of the handle and has a depth in a range of 1 to 2 mm inward of the container body.   The container made of synthetic resin with a handle according to claim 6 or 7, wherein a cross-sectional shape of the depression is a bowl shape.

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