Synthetic resin bottle body

Abstract

To create a synthetic resin bottle body which can reduce a load at the time of pour-out work and which is suitable for reducing thickness and weight.SOLUTION: A bottomed-cylindrical synthetic resin bottle body is formed integrally by including a bottom part 6, a trunk part 5 provided continuously on the bottom part 6, a shoulder part 3, and a mouth cylindrical part 2 erected at an upper part of the shoulder part 3. A space between the trunk part 5 and the shoulder part 3 is continuously provided via an upper part grip 4 comprising a substantially triangular shape in plan view, and at the bottom part 6, a lower part grip 7 having a substantially triangular shape in plan view is provided in a recessed manner.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a synthetic resin bottle having a relatively large capacity. [Background technology]

[0002] For example, in the case of relatively large containers with a capacity of more than 2 L (liters), a configuration is known in which the body is provided with an auxiliary recess (side grip) or handle portion in order to reduce the burden during the pouring operation (e.g., Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2017-514761 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-12076 Summary of the Invention [Problem to be solved by the invention]

[0004] In the invention described in Patent Document 1, the side grip 8 is formed as a recess formed in the side wall of the body 1, but if the body 1 is made too thin in order to reduce the weight of the entire container, there is a concern that it may bulge due to the filling pressure during molding, or that it may become difficult to lift stably. Therefore, since it is necessary to ensure the rigidity of the body 1, there is a natural limit to how thin it can be made, resulting in the problem that it is difficult to reduce the weight.

[0005] Furthermore, in the invention described in Patent Document 2, there is a limit to how thin the container can be made because the handle 8 is an injection-molded product made of a separate member, and there is a concern that molding defects may occur due to breakage or the like at the portion where the handle 8 is inserted. For this reason, there is the problem that it is difficult to reduce the container's weight, just like the invention described in Patent Document 1.

[0006] SUMMARY OF THE INVENTION In order to solve the above-mentioned problems in the prior art, an object of the present invention is to create a synthetic resin bottle that can reduce the burden during pouring and is suitable for being thin and lightweight. [Means for solving the problem]

[0007] Among the means for solving the above problems, the main means of the present invention is: A cylindrical synthetic resin bottle body with a bottom formed integrally with the bottle, having a bottom, a body portion connected to the bottom, a shoulder portion, and a neck portion erected on top of the shoulder portion, The torso portion and the shoulder portion are connected via an upper grip having a generally triangular shape in a plan view, The bottom portion is characterized by having a recessed lower grip having a generally triangular shape in plan view. In the main means of the present invention, the container can be securely and stably held with both hands by holding the upper grip with one hand and inserting the other hand into the lower grip and hooking the fingertips thereon.

[0008] Another aspect of the present invention is that the lower grip is formed with a phase difference in the circumferential direction relative to the upper grip, in addition to the main aspect of the present invention. In the above-described means, a phase difference can be provided between the lower grip and the upper grip, thereby reducing the strain on the wrist when gripping the container.

[0009] More specifically, the phase difference angle θ is set in the range of 0<θ≦+40° or 0<θ≦−40°. [Effects of the Invention]

[0010] In the present invention, an upper grip having an approximately triangular shape in plan view is formed on the body side, and a lower grip having an approximately triangular shape in plan view is recessed into the bottom. This eliminates the need to form a recess in the body for gripping or to attach a handle made of a separate member, so that the required rigidity can be maintained even if the body is made thin, resulting in a synthetic resin bottle that is suitable for lightweight design. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a synthetic resin bottle according to a first embodiment of the present invention. [Figure 2] This is a right side view of the synthetic resin bottle from the Y direction. [Figure 3] FIG. 2 is a front view of the synthetic resin bottle from the X direction. [Figure 4] 3A is a plan view of the synthetic resin bottle, FIG. 3B is a cross-sectional view of the synthetic resin bottle taken along the line bb in FIG. 2, and FIG. 3C is a bottom view of the synthetic resin bottle. [Figure 5] 4A and 4B show the relationship between the upper grip and the lower grip of a second embodiment of a synthetic resin bottle, where FIG. 4A is a cross-sectional view similar to FIG. 4B, and FIG. 4B is a bottom view of the synthetic resin bottle. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figure 1 is an oblique view showing a synthetic resin bottle according to a first embodiment of the present invention, Figure 2 is a right side view of the synthetic resin bottle as seen from the Y direction, Figure 3 is a front view of the synthetic resin bottle as seen from the X direction, Figure 4(a) is a plan view of the synthetic resin bottle, Figure 4(b) is a cross-sectional view of the synthetic resin bottle as seen from the direction of the arrow bb in Figure 2, and Figure 4(c) is a bottom view of the synthetic resin bottle. In the following, the direction along the container axis O will be referred to as the axial direction, the vertical direction, or the height direction, the direction perpendicular to the container axis O will be referred to as the radial direction (including the direction along the line connecting the container axis O and each column portion 4A described later, or the direction along the line connecting the container axis O and the vertices 7a, 7b, and 7c described later), and the direction circumferentially around the container axis O will be referred to as the circumferential direction.

[0013] The container shown in the first embodiment is a cylindrical, round synthetic resin bottle 1 (hereinafter referred to as "container 1") with a bottom, having an internal capacity of, for example, 4 L (liters), and formed by biaxially stretching and blow molding a preform (not shown) made of polyethylene terephthalate resin (hereinafter referred to as PET). Note that the internal capacity of container 1 is not limited to 4 L, and the scope of the present invention includes internal capacities of approximately 1.5 to 5 L.

[0014] The container 1 is basically formed integrally with a bottom 6, a cylindrical body 5 connected to the bottom 6, an upper grip 4 for holding connected to the body 5 and having a roughly triangular shape in a plan view, a shoulder 3 connected to the upper grip 4, and a cylindrical mouth 2 erected on the top of the shoulder 3. As shown in FIGS. 2 and 3, a male thread 2a is formed on the outer circumferential surface of the nozzle 2 for threading onto a screw cap (not shown), and a neck ring 2b is provided below the male thread 2a so as to protrude from the periphery. The shoulder portion 3 is formed so as to expand in diameter downward from the lower end of the nozzle portion 2, and an upper grip 4 is connected to the lower end thereof.

[0015] 1 to 3, the upper grip 4 is formed with three pillars 4A arranged and erected at an angle of 120° around the container axis O between the lower end of the shoulder 3 and the upper end of the body 5, three outer wall portions 4B arranged and erected between the three pillars 4A, an arc-shaped connecting portion 4C that connects the upper edge of the outer wall portion 4B to the lower end of the shoulder 3 in a stepped manner, and an inclined wall portion 4D that connects the lower edge of the outer wall portion 4B to the upper end of the body 5. Note that in this embodiment, a connecting portion with a slight step is provided between the shoulder 3 and the pillars 4A, but a configuration in which the shoulder 3 and the pillars 4A are smoothly connected (a configuration in which there is no step) may also be used.

[0016] The body 5 is formed in a substantially cylindrical shape with the largest diameter, and circumferential ribs 5a are recessed at multiple locations in the height direction of the body 5 to reinforce the rigidity of the body 5.

[0017] The bottom 6 is formed of an outer edge 6A that is connected to the lower end of the body 5 in a downwardly tapering shape, a ground contact portion 6B that is circularly formed around the lower end of the outer edge 6A, a recess 6C formed inside the ground contact portion 6B, and a lower grip 7 that is further recessed in the center of this recess 6C and has an approximately triangular shape in plan view.

[0018] The lower grip 7 is formed with vertices 7a, 7b, and 7c arranged in an inclined manner with a central angle of 120° around the container axis O within the recess 6C, three inner wall portions 7A arranged between each vertex, and a bottom wall portion 7B connected to the upper end of each inner wall portion 7A in an approximately triangular shape. In addition, between the outer edge portion 6A and the ground contact portion 6B, multiple reinforcing recessed ribs 6a are arranged at predetermined intervals in the circumferential direction, recessed radially inward to prevent deformation of the outer edge portion 6A and the ground contact portion 6B.

[0019] 4(a) and 4(b), one of the three pillars 4A constituting the upper grip 4 is positioned on the X-axis, and the other two pillars 4A are positioned at equal distances from the X-axis. In other words, one pillar 4A is positioned on the perpendicular bisector (which is also the X-axis) passing through the midpoint P1 of the imaginary line P (a line parallel to the Y-axis) connecting the other two pillars 4A.

[0020] Similarly, as shown in Figure 4(c), one of the three vertices that make up the lower grip 7, vertex 7a, is positioned on the X-axis, and the remaining two vertices, 7b and 7c, are positioned at equal distances from the X-axis. In other words, vertex 7a is positioned on the perpendicular bisector (which is also the X-axis) that passes through the midpoint Q1 of an imaginary line Q (a line parallel to the Y-axis) that connects the other two vertices, 7b and 7c.

[0021] That is, as shown in Figures 4(a)(b)(c), the upper grip 4, which is formed in an approximately triangular shape when viewed from above, and the lower grip 7, which is also formed in an approximately triangular shape when viewed from above, are formed in the same phase (phase difference = 0) in the circumferential direction.

[0022] In this embodiment, the outer wall portion 4B and inner wall portion 7A that respectively constitute the upper grip 4 and the lower grip 7, which are approximately triangular in shape when viewed from above, are both configured as convex curved surfaces that bulge outward in the radial direction, but they may also be concave curved surfaces that are recessed inward in the radial direction, or they may be formed as flat surfaces that are not curved in the radial direction. Furthermore, in this embodiment, the vertices located between the outer wall portions 4B that constitute the upper grip 4, and the vertices 7a, 7b and 7c that constitute the lower grip 7 are all formed in a convex arc shape that faces radially outward, but the shape of each vertex is not limited to this, and for example, each vertex may be formed in a chamfered (straight or curved) shape.

[0023] As described above, the three outer wall portions 4B that make up the upper grip 4 are formed with a central angle of 120° around the container axis O. Therefore, when a user holds the container 1, by placing one of the pillar portions 4A in the valley between the thumb and index finger of one hand, the user can support one of the outer wall portions 4B adjacent to one of the pillar portions 4A with the thumb and support the other outer wall portion 4B from below with the palm of the hand, allowing the upper grip 4 to be held securely and stably. Furthermore, by making the upper grip 4 approximately triangular, it is possible to easily align it in the circumferential direction with the lower grip 7, which also has an approximately triangular shape (to make the phase difference 0).

[0024] Furthermore, as described above, by making the lower grip 7 substantially triangular, when the fingers of the other hand are inserted into the lower grip 7, the fingertips can be placed on any of the vertices 7a, 7b, 7c or on any of the inner wall portions 7A. Furthermore, since the inner wall portion 7A has a relatively large area, it is possible to press one inner wall portion 7A with multiple fingers. This prevents the load of the container 1 from being concentrated on a specific finger. The container 1 can then be held with both hands by inserting the fingers of the other hand into the lower grip 7 provided on the bottom 6. This allows even a relatively large-capacity container 1 to be held stably.

[0025] FIG. 5 shows the relationship between the upper grip and the lower grip as a second embodiment of a synthetic resin bottle, where FIG. 5(a) is a cross-sectional view similar to FIG. 4(b), and FIG. 5(b) is a bottom view of the synthetic resin bottle. The container 1 shown in the second embodiment differs from the first embodiment in the relative positions of the upper grip 4 and the lower grip 7, but other configurations and effects are the same as those of the first embodiment. Therefore, the following description will focus on the differences from the first embodiment, and the same parts will be designated by the same reference numerals.

[0026] As shown in FIG. 5(a), the upper grip 4 is in the same state as in FIG. 4(b). On the other hand, as shown in FIG. 5(b), the lower grip 7 is formed at a position rotated circumferentially by the offset angle θ. For example, as shown in FIG. 5, when the offset angle θ is set to +30° clockwise in the circumferential direction, vertex 7a of one grip moves from the X-axis, while the other vertex 7c moves onto the Y-axis. Therefore, as shown in FIGS. 5(a) and 5(b), the lower grip 7 is formed with a phase difference of the offset angle θ relative to the upper grip 4. In this way, by setting the phase difference of the upper grip 4 relative to the lower grip 7 to a constant value, the strain on the wrist when gripping the container 1 can be reduced. The deviation angle θ is preferably in the range of greater than 0° and equal to or less than 40° (0<θ≦+40° or 0<θ≦−40°), and more preferably in the range of 10 to 30° (+10≦θ≦+30° or −10≦θ≦−30°).

[0027] Furthermore, unlike conventional containers, the present invention does not require the formation of a recess for gripping in the body portion 5 or the attachment of a handle made of a separate material, so that the required rigidity can be ensured even if the body portion is made thin, resulting in a container 1 that is suitable for lightweight design.

[0028] The configuration and effects of the present invention have been described above in accordance with the examples, but the present invention is not limited to the above examples. For example, in the first and second embodiments, the round container 1 having a cylindrical body 5 is shown and explained, but the container 1 may have a polygonal body 5 having a rectangular shape.

[0029] In addition, in FIG. 5(b) of the second embodiment, a case where a + (plus) deviation angle θ is set in one circumferential direction (clockwise) as the phase difference is shown and explained, but a configuration where a - (minus) deviation angle θ is set in the opposite direction (counterclockwise) may also be used. [Industrial Applicability]

[0030] The present invention can be used in a wider range of applications in the field of relatively large synthetic resin bottles. [Explanation of symbols]

[0031] 1: Synthetic resin bottle (container) 2: Mouth part 2a: Male thread 2b: Neck ring 3:Shoulder 4: Upper grip 4A:Column part 4B: External wall part 4C: Arc-shaped connecting part 4D: Inclined wall section 4L:Inner capacity 4a:Column part 5: Torso 5a: Circumferential rib 6: Bottom 6A: Outer edge 6B: Grounding part 6C: Recess 6a: Concave rib 7: Lower grip 7A:Inner wall 7B:Bottom wall part 7a: Vertex 7b: Vertex 7c:Vertex O: Container axis P: Virtual line P1: Midpoint of virtual line P Q: Virtual line Q1: Midpoint of virtual line Q θ: angle

Claims

1. A cylindrical bottle made of synthetic resin with a bottom, which is integrally formed with a bottom (6), a body (5) connected to the bottom (6), a shoulder (3), and a neck (2) erected on top of the shoulder (3), The body portion (5) and the shoulder portion (3) are connected via an upper grip (4) having a generally triangular shape in a plan view, The synthetic resin bottle is characterized in that a lower grip (7) having a generally triangular shape in plan view is recessed into the bottom (6).

2. 2. A synthetic resin bottle according to claim 1, wherein the lower grip (7) is formed with a phase difference in the circumferential direction relative to the upper grip (4).

3. 3. The synthetic resin bottle according to claim 2, wherein the phase difference angle θ is set in the range of 0<θ≦+40° or 0<θ≦−40°.

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