JP5224599B2 - Assembled plastic container - Google Patents

Description

  In this invention, a side plate is disposed on four sides of a rectangular bottom plate via a hinge part or a pivot shaft, and the assembly can be easily assembled from a folded state and can be easily folded. In particular, the present invention relates to an assembly-type synthetic resin container that can be securely assembled without disengaging the engaging portion when the side plate is assembled.

  Conventionally, a side plate is erected on the four sides of a bottom plate formed in a square shape via a hinge part or a rotating shaft part, and the side plates are assembled by engaging each other, and the engagement state between the side plates is released. As a result, an assembly-type synthetic resin container that is folded inward is used. Synthetic resin containers are excellent in durability and can be used repeatedly, and are frequently used in place of cardboard boxes from the viewpoint of resource saving that has been raised in recent years.

  As such a container, for example, there is a folding container disclosed in JP-A-2006-143300 and JP-A-2007-106499. FIG. 4 and FIG. 14 described in Japanese Patent Application Laid-Open No. 2007-106499 are shown in FIG. 8 and FIG. 9, respectively.

  As shown in FIG. 8, the folding container disclosed in Japanese Patent Application Laid-Open No. 2007-106499 is opposed to the inner surface 2a1 of the plate-like portion 2a at both vertical ends of the opposite long side wall 2 that is tilted later. A substantially vertical vertically long engagement frame 2b is formed, and a fitting hole 2b1 substantially parallel to the plate-like portion 2a is formed in the engagement frame 2b at a predetermined interval in the vertical direction.

  In addition, a pair of horizontal groove portions 2c1 formed at a predetermined interval in the vertical direction and a horizontal groove portion located on the engagement frame 2b side at the upper corner of the plate-like portion 2a located near the engagement frame 2b A substantially U-shaped slit 2c comprising a vertical groove connected to the end of 2c1 is formed, and an elastic tongue 4 having a free end on the side of the engagement frame 2b is formed on the long side wall 2. ing. The distal end surface 4a1 of the elastic tongue piece 4 is formed as a flat surface substantially parallel to the engagement frame 2b, and the side surface 4a2 of the locking projection 4a moves toward the distal end surface 4a1 of the locking projection 4a. It is formed in the inclined surface inclined in the front-end | tip direction of the engagement frame 2b.

  Further, as shown in FIG. 9, a lock member 5 that can be moved up and down is attached to one of the opposing short side walls 3 that is first tilted, and is fitted into a vertically long belt-like frame 3p formed by extending to both ends. A mating projection 3p1 is projected. The fitting protrusion 3p1 is configured to be inserted into a fitting hole 2b1 formed in the engaging frame 2b of the long side wall 2 when assembled into a box shape, and the fitting is applied to the belt-like frame 3p. The same number of fitting protrusions 3p1 as the holes 2b1 are provided.

  The operation of assembling the folding container having the above-described configuration into a box shape will be described. First, the substantially horizontal long side wall 2 superimposed on the short side wall 3 is rotated in the vertical direction to stand substantially vertically. Next, when the short side wall 3 folded so as to overlap the bottom plate is rotated in the vertical direction, the belt-like frame 3p of the short side wall 3 approaches so as to face the engagement frame 2b formed on the long side wall 2, The contact flange 5b of the lock member 5 attached to the short side wall 3 causes the elastic tongue piece 4 protruding from the inner surface of the long side wall 2 to bend outwardly against the elasticity of the elastic tongue piece 4.

  Further, when the short side wall 3 is rotated, the fitting protrusion 3p1 protruding from the belt-like frame 3p of the short side wall 3 is inserted into the fitting hole 2b1 formed in the engaging frame 2b of the long side wall 2. In the above process, the contact flange 5b of the lock member 5 attached to the short side wall 3 is detached from the locking projection 4a of the elastic tongue 4 on the long side wall 2, and the elastic tongue 4 is returned to its original position by its elasticity. Returning, it is inserted into the gap formed between the engagement frame 2b.

Therefore, even if the short side wall 3 tries to rotate in the bottom direction, the contact flange 5b comes into contact with the locking projection 4a of the elastic tongue piece 4, and the rotation is prevented. Further, the long projection 2 and the short sidewall 3 are inserted into the fitting hole 2b1 formed in the engagement frame 2b of the long side wall 2 by inserting the fitting protrusion 3p1 projecting from the belt-like frame 3p of the short side wall 3. Is maintained, and the rotation of the long side wall 2 in the outward direction is prevented.
JP 2006-143300 A JP 2007-106499 A

  In the container described in the above publication, the abutment bar 5b of the lock member 5 attached to the short side wall 3 abuts on the locking projection 4a of the elastic tongue 4 formed on the long side wall 2 so that the container can be rotated in the bottom direction. Although being prevented, the long side wall 2 and the short side wall 3 are formed so that the fitting protrusion 3p1 projecting from the belt-like frame 3p of the short side wall 3 has a fitting hole 2b1 formed in the engaging frame 2b of the long side wall 2. It is only engaged by being inserted. Therefore, when a large impact is applied to the long side wall 2 in the outward direction, the engaged state with the short side wall may be released.

  In particular, since the fitting protrusion 3p1 of the short side wall 3 and the fitting hole 2b1 of the long side wall 2 are formed in the same size in the vertical direction, the fitting protrusion 3p1 is more easily detached from the fitting hole 2b1 in the upper part. There is a problem.

  The present invention has been made in view of the present situation. In an assembly type synthetic resin container formed by connecting four side plates to a bottom plate so as to be freely bent, the side plate on the long side and the side plate on the short side can be securely connected. It is an object of the present invention to provide a robust assembly-type synthetic resin container that can be engaged and does not come off even when a large impact is applied.

In order to achieve the above object, the present invention is configured as follows. That is, the assembly type synthetic resin container according to the present invention comprises a flat rectangular bottom plate and four side plates connected to bendable along side edges of the bottom plate, and the side plates are opposed to each other. In an assembly-type synthetic resin container that can be folded inward with a pair of side plates to be attached, upper parts on both side ends of adjacent side plates to prevent the side plates from rotating outward when assembled. An engaging part and a lower engaging part are provided.
The upper engaging portion is folded after the locking projection ing from the insertion portion inner surface at both ends projecting on the inner surface in the same direction in the base portions and protruding perpendicularly from the base portion of the side plate which is first folded, The frame is formed by providing a rectangular frame on the inner surface of the protruding portion that protrudes by extending the outer side of the side plate from both ends of the side plate in a perpendicular direction, and providing a notch in the protruding portion of the portion provided with the frame portion. together comprising a through hole formed in the portion, by forming a pre-Symbol retaining projection to be inserted into the through hole.
Further, the lower engaging portion is first folded by a plane substantially L-shaped projections projecting from the opposite ends of the side plate, from the opposite ends of the side plate perpendicular to the extending the collision detecting section on a side plate of folded after In addition to an engagement plate projecting inwardly in parallel with the inner surface, the planar substantially L-shaped projection is formed so as to engage with the engagement plate. The thickness of the rectangular frame provided on the side plate that is folded later is formed larger than the protruding width of the engaging plate at the lower engaging portion.

  And the planar substantially L-shaped protrusion protrudingly provided on the side plate that is folded first that constitutes the lower engaging portion can be formed by being divided into a plurality of parts.

  As is apparent from the above description, in the present invention, when the adjacent side plates are assembled with each other, the upper engagement portion is made thicker than the lower engagement portion at the upper portion of the side plate that is easily rotated and removed. Since the size is increased, it can be safely stored and transported without being detached even if it is slightly displaced due to a large impact.

  Hereinafter, an embodiment illustrating an assembly type synthetic resin container according to the present invention will be described. The assembly type synthetic resin container according to the present invention is basically configured similarly to the container described in the conventional example. That is, as shown in FIG. 1, the container 10 is opposed to a pair of side plates 13 and 13 on the short side that are folded first, along the edge of the rectangular bottom plate 11, and is folded later. Four side plates of a pair of side plates 15 and 15 on the long side are provided. The four side plates 13 and 13 and the side plates 15 and 15 are pivotally attached to a rotation shaft (not shown) provided at an edge portion of the bottom plate 11, respectively.

  In this embodiment, the side plates 13 and 13 on the short side are first folded inward in the bottom plate direction, and the side plates 15 and 15 on the long side are placed on the folded side plates 13 and 13 on the rear side. Fold from. And the rotation axis | shaft of the side plates 15 and 15 of a long side is arrange | positioned on the height adjustment parts 17 and 17 which protruded from the bottom plate 11 so that the side plates 15 and 15 folded later may become horizontal. Yes. The final folded state is a substantially horizontal plate state (not shown).

  When the side plates 13 and 13 and the side plates 15 and 15 are raised and assembled to the vertical end portions of the side plates 13 and 13 on the short side and the side plates 15 and 15 on the long side, they are rotated outward. An upper engagement portion 18 and a lower engagement portion 19 are provided to prevent movement. The upper engaging portion 18 and the lower engaging portion 19 are engaged with a protruding portion extending in a right angle direction from both ends of the side plates 15 and 15 on the long side and both ends of the side plates 13 and 13 on the short side. Part.

  Next, the through-hole 20 formed in the upper part of the side plates 15 and 15 of the long side which comprise the said upper engaging part 18 is demonstrated. As shown in FIGS. 2 and 3, the through-hole 20 protrudes in a direction perpendicular to the inner surfaces of the side plates 15, 15 from both vertical end portions of the long side side plates 15, 15 that are folded later. It is formed in the parts 25 and 25. The protrusions 25 and 25 are formed by extension plates having the same surface extending from the outer surfaces of the side plates 15 and 15, and abut on the side plates 13 and 13 on the short side that are folded first, and turn outward. In addition, the upper engaging portion 18 and the lower engaging portion 19 are formed to have a sufficient protruding width.

  The through hole 20 is formed by projecting a frame portion 27 on the inner surface of the projecting portion 25. In other words, the frame portion 27 is formed to be thicker in the horizontal direction than the portion that forms the lower engaging portion 19, and is formed to have a thickness that is substantially the same as the thickness of the side plates 15, 15 on the long side. The through-hole 20 is provided with a frame portion 27 having the same dimensions as the thickness of the side plates 15, 15 on the inner side of the protrusion portion 25, and a notch on the outer surface side by notching the protrusion portion 25 where the frame portion 27 is provided. 28 is provided.

  Therefore, the inner surface in the vertical direction of the through-hole 20 is the same surface as the surface obtained by extending the inner surfaces of the side plates 15, 15 on the long side, and the outer surface side is formed to be recessed by the notch 28. Since the through-hole 20 penetrates without being blocked by providing the cutout 28 on the outer surface side, the locking projections projecting from both ends of the side plate on the short side by the thickness of the projection 25. The insertion length can be increased.

  On the other hand, as shown in FIGS. 2 and 6, the locking projections 21 projecting from both ends on the short side constituting the upper engagement portion 18 are provided on both side surfaces of the side plates 13 and 13 on the short side. The base portion 21a and the insertion portion 21b are formed in a substantially L shape, and are formed outward from the inner side surfaces of the side plates 13 and 13 (in the outer side direction of the side plates 13 and 13). Further, the locking projection 21 is formed so as to be inserted into the through hole 20 when the short side plates 13 and 13 are erected and assembled with the long side plates 15 and 15. The tip surface of the portion 21 b is formed to have a length that is substantially flush with the outer surface of the protruding portion 25.

  As shown in FIG. 6, when the insertion portion 21 b of the locking projection 21 is inserted into the through-hole 20, the insertion portion 21 b of the locking projection 21 and both side surfaces of the side plates 13 and 13 on the short side are formed. A part of the frame portion 27 forming the through hole 20 is fitted therebetween.

Next, the structure of the lower engaging portion 19 that prevents the side plates 15 and 15 from rotating outward when the side plates 13 and 13 and the side plates 15 and 15 are assembled will be described. The lower engaging portion 19 is formed by an engaging plate 30 protruding from the protruding portion 25 of the side plate 15 on the long side and a plane substantially L- shaped protrusion 23 protruding on both side end surfaces of the side plate 13 on the short side. It is configured.

The engaging plate 30 has inner surfaces of the side plates 15 and 15 on the long side on projecting portions 25 and 25 that project from the right side ends of the side plates 15 and 15 on the long side that are folded later. It protrudes in parallel with. The protrusion width of the engagement plate 30 is approximately half of the protrusion width of the frame portion 27. Thus, by the inner surface and projecting portions 25 and the engaging plate 30, 30 of the side plates 15 and 15 on the long side, so that the cross-section substantially U Jo凹 portion 31 in plan is formed (see FIG. 7) .

  On the other hand, planar substantially L-shaped projections 23 constituting the lower engaging portion 19 are projected from both vertical end portions of the side plate 13 on the short side. The planar substantially L-shaped projection 23 is inserted into the substantially U-shaped recess 31 in the cross section when the side plates 13 and 13 on the short side are erected and assembled with the side plates 15 and 15 on the long side. And the tip end surface of the protrusion 23 is close to the inner surface of the protrusion 25. As described above, the protrusion 23 and the engagement plate 30 engage with each other, so that the side plates 15 and 15 on the long side can be prevented from rotating outward, and a robust assembly state can be maintained.

The planar substantially L-shaped projection 23 can be formed integrally in a continuous manner in the vertical direction, but is preferably formed by dividing it into a plurality as shown in the embodiment. Although not shown in the figure, the substantially planar L-shaped projection 23 may be fitted into a groove provided on the inner surface on the protruding portion 25 side. Furthermore, handle holes 35 and 36 for inserting a finger when carrying the container are provided in the upper center of the side plates 13 and 13 on the short side and the upper center of the side plates 15 and 15 on the long side. Yes.

  Next, when the side plates 15 and 15 on the long side are raised from the folded state and then the side plates 13 and 13 on the short side are raised, the side plate 13 on the short side is prevented from falling in the bottom plate direction. The lock part 40 will be described. The lock part 40 is configured by lock levers 41 and 41 provided at both end portions of the pair of long side plates 15 and 15 and a lock member 43 attached to the short side plates 13 and 13. Yes.

  As shown in FIGS. 2 to 4, the lock levers 41, 41 are formed by cutting the upper and lower sides and the sides near the side edges of the side plate 15 into a substantially U shape at both ends of the side plates 15, 15 on the long side. A slit 41a is formed and one side is integrally connected to a side plate to form a plate 45 having the protruding portion 25 as a free end. Further, the central portion of the plate 45 is cut out in a rectangular shape to form a through hole 46, and an engagement piece 47 is provided at the front end portion of the plate 45 in the inner direction of the side plates 15 and 15 on the long side. It is formed by.

  The engaging piece 47 is formed in a substantially triangular cross section, the upper surface 47a is formed in a horizontal plane substantially on the same surface as the upper surface of the plate 45, and the lower surface 47b is formed in a tapered surface, whereby the tip surface 47c is substantially formed. It is formed on a vertical surface. The lower surface 47b is formed in a tapered surface with the tip surface 47c side facing downward. Since the plate 45 is provided with a through hole 46 on the connecting base side together with the slit 41a, the engagement piece 47 can be bent in the vertical direction in the slit 41a and has a spring action.

  On the other hand, as shown in FIGS. 2, 5, and 7, a lock member 43 constituting the lock portion 40 is attached to the upper portion of the side plate 13 on the short side. The lock member 43 includes an operation portion 48 and an engagement protrusion piece 49 projecting from the tip of the operation portion 48, and the engagement protrusion piece 49 engages with the engagement piece 47 of the lock lever.

  The lock member 43 has an engaging protrusion 49 that engages with the engaging piece 47 at the tip of both ends of the operation portion 48 in a horizontal direction, and a spring that applies a biasing force to the lower surface of the operation portion 48. (Elastic pieces) 50, 50 are provided symmetrically. The operation portion 48 has a substantially central outer surface recessed to form a finger hanging recess 48a, and the springs (elastic pieces) 50 and 50 are obliquely projected so as to have a spring action on the lower surface of the operation portion 48. Is formed by.

  Further, as shown in FIGS. 2 and 5, the lock member 43 is provided with slits 51, 51 formed on the side plates 13, 13 on the short side, and arrowhead-like protrusions 53, 53 protruding from the back of the operation unit 48. By inserting, it is slidable in the vertical direction. Due to the arrowhead projections 53 and 53 inserted into the slits 51 and 51, the lock portion 43 is slid up and down in the slits 51 and 51 without being disengaged.

  In order to attach the locking members 43 of the side plates 13 and 13 on the short side so as to be slidable in the vertical direction, the arrowhead-like projections 53 and 53 on the side plates 13 and 13 side are reversed. The slits 51 and 51 may be provided in the operation portion 48 of the lock member 43. In addition, as long as the lock member 43 can be moved up and down, the attachment to the side plates 13 and 13 can have an arbitrary structure.

  Next, the operation of the lock unit 40 will be described with reference to FIGS. 1, 2, 6, and 7. When assembling the container, first, the opposed side plates 15 and 15 on the long side are erected, and then the side plates 13 and 13 on the short side are erected. When the upper ends of the side plates 13 and 13 (the side on which the lock member 43 is mounted) are lifted, the upper ends of the side plates 15 and 15 are raised while drawing an arc on the inner surface. (See FIG. 2).

When the upper ends of the side plates 13, 13 approach the projecting portions 25, 25 of the side plates 15, 15, the engagement protrusions 49 protruding from the tips of the operation portions 48 come into contact with the lower surfaces of the engagement pieces 47 of the lock lever 41.
Further, when the side plates 13 and 13 are rotated, the engagement protrusions 49 and the engagement pieces 47 push the engagement pieces 47 upward by the mutual spring action, and the engagement pieces 47 are engaged. The projecting piece 49 is pushed down. At this time, since the lower surface 47b of the engagement piece 47 is formed as a tapered surface that faces downward toward the distal end surface 47c, it can be slid even with a weak force by the mutual spring action.

  When the engagement protrusion 49 is positioned on the tip surface 47c while sliding on the lower surface of the engagement piece 47, the engagement piece 47 is lowered by the spring action of the lock lever 41, and conversely, the engagement protrusion 49 is Since it is raised, the engagement protrusion piece 49 turns around to the tip end face 47 c side of the engagement piece 47. In this way, the engaging protrusion 49 is located between the distal end surface 47 c of the engaging piece 47 and the inner surface of the protruding portion 25 and engages with the engaging piece 47.

Further, when the side plates 13 and 13 are turned up and started, the lower engaging portion 19 is engaged. That is, as the side plates 13 and 13 stand while rotating, the substantially planar L- shaped projections 23 constituting the lower engaging portion 19 and the engaging plates 30 and 30 of the long side side plates 15 and 15 are sequentially formed from below. Engage. Next, the locking projections 21 projecting from both ends of the side plates 13 and 13 are inserted into the through holes 20 formed in the upper portions of the projections 25 and 25.

  In this way, the container 10 can be easily assembled with a single operation simply by raising the side plates 15 and 15 on the long side and then raising the side plates 13 and 13 on the short side. The upper engaging portion 18 projects a frame portion 27 having a width dimension larger than that of the lower engaging plates 30, 30 to a protruding portion 25 that protrudes perpendicularly to both vertical end portions of the long side plates 15, 15. In addition, the inner side of the frame portion is formed as a through hole 20 and a notch 28 is provided in the outer surface side protruding portion 25 to insert the locking protrusions 21 of the side plates 13 and 13 on the short side. Accordingly, the length of the insertion portion 21b of the locking projection 21 can be made sufficiently long, and even when a heavy impact is applied to the side plates 15 on the long side, the through-hole 20 and the locking projection The locked state with 21 does not come off.

  Next, when the lock state is released and folded, the operation portion 48 of the lock member 43 may be pushed down to release the engagement state between the engagement protrusion 49 and the engagement piece 47. That is, in order to release the engagement state between the engagement projection piece 49 and the engagement piece 47, a finger is put into the finger-engaging recess 48 a of the lock member 43 and pushed downward against the spring (biasing plate) 50. At this time, the engaging protrusion 49 projecting from the tip is also pushed down, so that the upper surface of the engaging protrusion 49 is pushed down below the lower surface of the engaging piece 47, and the side plates 13 and 13 are brought into a locked state as they are. Will be canceled.

  If the engagement state between the engagement protrusions 49 and the engagement pieces 47 is released, it is possible to tilt the side plates 13 and 13 inward while rotating, contrary to when assembling. Accordingly, if the side plates 13 and 13 are tilted inward while the lock member 43 is pushed down, and the side plates 13 and 13 are pushed down, the finger is released from the finger-engaging recess 48a and the push-down is stopped. The locking member 43 returns to the original position by the urging force of 50. Thereafter, the container 10 can be easily folded by tilting the side plates 15 and 15 inward.

It is a perspective view in the middle of the assembly or folding of the assembly-type synthetic resin container of this invention. It is a partial expansion perspective view in the middle of the assembly or folding in the four corners of the side plate on the long side and the side plate on the short side. It is a partial expansion perspective view of the side plate of a long side. It is the partial expanded sectional view which similarly looked at the side plate of the long side from the inner side. It is the partial expansion perspective view which looked at the side plate of the short side from the outside. It is the top view which showed the engagement state in an upper engaging part partially in cross section. It is the top view which showed the engagement state in a lower engagement part in partial cross section. It is the elements on larger scale of the side plate of the long side of the assembly type synthetic resin container of a prior art example. It is the elements on larger scale of the side plate of the short side of the assembly type synthetic resin container of a prior art example similarly.

11: Rectangular bottom plate 13: Short side plate 15: Long side plate 17: Height adjustment portion 18: Upper engagement portion 19: Lower engagement portion 20: Through hole 21: Locking protrusion 23: Plane Substantially L- shaped protrusion 25: Protruding portion 27: Frame portion 28: Notch 30: Engagement plate 31: Concave portion having a substantially U-shaped section
35, 36: Handle hole 40: Lock part 41: Lock lever 41: Slit 43: Lock member 45: Plate 46: Through hole 47: Engagement piece 48: Operation part 49: Engagement protrusion piece 50: Spring (elastic piece)

Claims (2)

It consists of a planar rectangular bottom plate and four side plates that are foldably connected along side edges of the bottom plate, and each side plate can be folded inward with a pair of opposing side plates. In the synthetic resin container,
An upper engagement portion and a lower engagement portion are provided at both side end portions of the adjacent side plates so as to prevent the side plates from rotating outward when the adjacent side plates are assembled.
The upper engaging portion is folded after the locking projection ing from the insertion portion inner surface at both ends projecting on the inner surface in the same direction in the base portions and protruding perpendicularly from the base portion of the side plate which is first folded, The frame is formed by providing a rectangular frame on the inner surface of the protruding portion that protrudes by extending the outer side of the side plate from both ends of the side plate in a perpendicular direction, and providing a notch in the protruding portion of the portion provided with the frame portion. together comprising a through hole formed in the portion made by forming a pre-Symbol retaining projection to be inserted into the through hole,
The lower engaging portion has a flat, substantially L-shaped projection projecting from the opposite ends of the side plate is first folded, collision detecting section on the side plate of the inner surface and extending perpendicularly from both ends of the side plates to be folded later and And an engagement plate projecting inward in parallel,
The plane substantially L-shaped projection is formed so as to engage with the engagement plate,
An assembly-type synthetic resin container, wherein a thickness of a rectangular frame provided on a side plate that is folded later is formed to be larger than a protruding width of an engaging plate at a lower engaging portion.   2. The assembly type synthetic resin container according to claim 1, wherein the planar substantially L-shaped protrusion projecting from the side plate that is first folded that constitutes the lower engaging portion is formed by being divided into a plurality of parts. .

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