JP4457392B2 - Assembled plastic container - Google Patents

Description

  The present invention relates to an assembling box in which a side plate is disposed on a bottom plate via a bent portion or a rotating shaft, and can be easily assembled from a folded state and can be easily folded. An assemblable synthetic resin container that can be stored and transported by folding the side plate connected to each side edge of the bottom plate via a bent portion or a rotating shaft inwardly toward the bottom plate and compactly folding the side plate. It is about.

  Conventionally, assembling-type synthetic resin containers are used for transporting agricultural products such as vegetables and fruits and various industrial products. 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. Examples of such an assembly type synthetic resin container include the following containers.

  For example, the container disclosed in Japanese Patent Application Laid-Open No. 2004-75079 includes an operation portion and a slide engagement protrusion at the substantially central portion on the outer surface of one opposing side wall, and engagement protrusions at both ends. An engaging member is provided at both end portions of the other opposite side wall to restrict rotation to a direction not engaged with the engaging protrusion, and the operation of the engaging member is performed. By moving the part up or down, the engagement state between the engagement protrusion and the engagement part is released.

  That is, the engaging protrusions at both ends of the engaging member attached so as to be movable up and down are engaged with the engaging portion formed integrally with the side wall by a spring action. Accordingly, the side wall is assembled at the same time as being locked, and the locked state is released by lowering the engaging protrusion with respect to the fixed engaging portion.

  Moreover, as an assembly structure container, there exists a container disclosed by Unexamined-Japanese-Patent No. 2003-40263. That is, the outer side surface of the first side wall is provided with an engaging member provided with an operating portion at a substantially central portion and provided with engaging protrusions at both ends, and the engaging protrusions are provided at both ends of the second side wall. An engagement portion for restricting the inward rotation of the first side wall is provided, and the operation portion of the engagement member is moved up or down to move the engagement protrusion and the engagement portion between It is a container of an assembling-type structure in which the engaged state is released.

Such a container is in an engaged state at the same time as it is assembled with its side walls upright, and can be easily assembled. Further, when not in use, since the engaged state is released simply by moving the operating portion of the engaging member up or down, the folding work can be easily performed.
Japanese Unexamined Patent Publication No. 2004-75079 (FIGS. 1 and 9) JP 2003-40263 A (FIGS. 1 to 4)

  In any of the containers described in the above publications, the engaging member attached to the upper part of one opposing side wall is biased upward by a spring (biasing plate) projecting from the lower surface. In order to maintain the locked state, a certain amount of spring strength is required. The unlocking operation is difficult to operate because a strong force must be applied to the finger in order to push down the engaging member against the biasing force of the spring (biasing plate).

  The present invention has been made in view of the present situation, and an object of the present invention is to provide an assembly type synthetic resin container excellent in workability as a lock structure capable of smooth operation.

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. An assembly-type synthetic resin container that can be folded inward with a pair of side plates
The lock lever is provided with a lock lever provided at both ends of a pair of opposing side plates and a lock member attached to the other pair of opposite side plates. An engagement piece projects from the tip of a plate integrally provided with the side plate, and the lock member includes an operation portion and an engagement projection projecting from the tip of the operation portion. Provided with a finger-hanging recess, a locking projection formed in the recess provided on the back side of both ends of the operation unit, and a spring projecting on the lower surface,
The side plate on which the lock member is mounted is provided with a locking portion that engages with the locking protrusion,
The lock member is mounted on the upper portions of the pair of side plates so as to be movable up and down by engaging the locking portion and the locking protrusion.

Moreover, it is preferable that the engagement protrusion of the lock member is formed with a tapered upper surface. By forming the upper surface as a tapered surface, the contact with the locking piece of the lock lever is facilitated and smooth sliding is possible. The same effect can be obtained by forming the lower surface of the engagement piece of the lock lever into a tapered surface .

  As is apparent from the above description, the present invention has a structure in which both the lock lever and the lock member mounted on the side plate have a spring action, so that the resistance when assembling is small and can be assembled easily and securely locked. Can do. In addition, the spring (biasing plate) protruding from the lower surface of the lock member is sufficient with a small urging force, so it can be moved down simply by applying a weak force when releasing the lock, and the folding work is easy. is there.

  The assembly type synthetic resin container according to the present invention will be described in detail based on the illustrated embodiment. The assembly-type synthetic resin container 10 includes a rectangular bottom plate 11 and four side plates 13 to 16 disposed along the edge of the bottom plate 11. Of the four side plates, the side plates 13 and 14 form opposing side plates on the short side, and the side plates 15 and 16 form opposing side plates on the long side. The side plates 13, 14 and the side plates 15, 16 are pivotally attached to respective rotary shafts 18, 19 provided at the end edges of the bottom plate 11.

  Further, in this embodiment, the side plates 13 and 14 on the short side are first folded inward, and the side plates 15 and 16 on the long side are folded back later, but the side plates 15 and 16 that are folded back are folded substantially horizontally. In order to be able to do so, the position of the rotation axis of the side plate that is folded later is disposed higher than the rotation axis of the side plate that is folded first. That is, the rotation shafts of the side plates 15 and 16 that are folded later are disposed on the height adjusting unit 20. A handle hole 21 into which a finger is inserted when carrying the container 10 is provided in the approximate center of the upper portion of the side plates 13 and 14 on the short side.

  As shown in FIGS. 2 and 3, projecting portions 15a and 16a projecting inward so as to be orthogonal to the side plates are provided at both ends of the side plates 15 and 16 on the long side that are folded later. . The outer surfaces of both end portions of the side plates 13 and 14 on the short side are joined to the inner surfaces of the protruding portions 15a and 16a, thereby preventing the side plates 13 and 14 from rotating outward, and as will be described later, the side plate 13 , 14 is provided with a lock portion so as to prevent it from falling inward. Therefore, the assembled state is reliably maintained by the protrusions 15a and 16a.

  The side plates 13 and 14 and the side plates 15 and 16 are pivotally attached to the bottom plate 11. First, the side plates 13 and 14 can be folded on the bottom plate 11 inward. In the illustrated embodiment, the side plates 13 and 14 on the short side are first folded, and then the side plates 15 and 16 on the long side are folded. The final folded state is a plate that is substantially horizontal as a whole. State (not shown).

  The container 10 having the above-described configuration is erected with the side plates 15 and 16 on the long side from the folded state with the pivot shaft 19 as a fulcrum, and then the side plates 13 and 14 on the short side with the pivot shaft 18 as a fulcrum. If it does, it will be locked by the lock | rock part 23 provided in the surface to each join, and can be set as an assembly state.

  The lock portion 23 is constituted by lock levers 25 and 25 provided at both end portions of the pair of long side side plates 15 and 16 and a lock member 24 attached to the side plates 13 and 14 on the short side side. Yes.

  As shown in FIGS. 2 and 4, the lock levers 25, 25 are formed of a plate 30 formed by cutting out three sides into a substantially U shape on the side plates 15, 16 on the long side and integrally connecting one side with the side plate. Further, a through hole 31 is formed by cutting out a rectangular shape at the center, and an engagement piece 33 protruding inward is provided at the tip of the plate 30. That is, the engagement piece 33 provided at the tip of the plate 30 that forms part of the side walls of the side plates 15 and 16 engages with the engagement protrusion 27 at the tip of the lock member 24 mounted on the side plate on the short side. It is formed to do.

  As shown in FIG. 4, the engaging piece 33 has a substantially triangular cross section, and the upper surface 33a is formed in a horizontal plane substantially in the same plane as the upper surface of the plate 30, and the lower surface 33b is formed in a tapered surface. The distal end surface 33c is formed in a substantially vertical surface. The lower surface 33b is formed in a tapered surface with the tip surface 33c side facing downward. In addition, when the upper surface 27a of the engagement protrusion 27 is formed in a taper surface so that it may mention later, the lower surface 33b of the engagement piece 33 is good also as a horizontal surface or a circular arc surface instead of a taper surface.

  Lock levers 25 and 25 each having an engagement piece 33 provided at the tip of the plate 30 are disposed in a substantially identical cutout hole 35 formed by cutting out the outer peripheral edge. Further, since the plate 30 is provided with a through hole 31 on the side of the base 37 connected to the side plates 15 and 16, the base 37 of the plate 30 can be bent in the vertical direction in the cutout hole 35. It has a spring action.

  A recess 39 is formed on the upper inner surfaces of the protrusions 15a and 16a. The concave portion 39 serves as a relief allowance for the engaging portions 40 provided on both end surfaces of the side plates 13 and 14. Accordingly, the recess 39 can be omitted as appropriate.

  As shown in FIG. 2, the engaging portion 40 is provided with notches 41 and 41 at the upper portions of both side ends of the side plates 13 and 14, and a notch is provided on the outer surface side so as to be smaller than the width dimension of the side plates 13 and 14. It is formed by setting it as a width dimension. The reason why the width dimension of the engaging portions 40, 40 is smaller than the width dimension of the side plates 13, 14 is that when the engaging portion 40 is fitted in the recess 39, the outer surface of the side plates 13, 14 and the protruding portions 15a, 16a. The thickness dimension is adjusted so that the outer surface of the film is the same.

  Next, the lock member 24 attached to the side plates 13 and 14 on the short side will be described. As shown in FIGS. 3 and 5, the lock member 24 includes an operation portion 50 and an engagement protrusion 27 protruding from the tip of the operation portion 50. The engagement protrusion 27 is an engagement piece of the lock lever. 33 is engaged. The lock member 24 is formed by projecting an engagement protrusion 27 that engages with the engagement piece 33 at the tip of both ends of the operation section 50 in the horizontal direction, and a spring (biasing plate) that applies an urging force to the lower surface. 51 and 51 are provided. The springs (biasing plates) 51 and 51 are formed so as to have a spring action by projecting obliquely on the lower surface of the operation portion 50 below the locking projection 57.

  The springs (biasing plates) 51, 51 are not limited to the illustrated form, and may be any structure that urges the operation unit 50 upward, for example, formed on a letter C. The operation part 50 is formed by recessing the outer surface of a substantially central part to form a finger hanging concave part 53 and projecting a locking protrusion 57 in a concave part 55 provided on the back surface on both end sides.

  The upper surface 27a of the engaging protrusion 27 is formed as a tapered surface inclined toward the front surface of the operation portion 50 (the surface opposite to the surface on which the locking protrusion 57 is protruded). By forming the upper surface 27a of the engagement protrusion 27 as a tapered surface in this way, it is easy to come into contact with the lower surface of the engagement piece 33 of the lock lever 25 and slides smoothly, so that the side plates 13 and 14 have a weak force. Can be locked. As described above, when the lower surface 33b of the engagement piece 33 is formed into a tapered surface, the upper surface 27a of the engagement protrusion 27 may be a horizontal surface or an arcuate surface instead of the tapered surface.

  As shown in FIGS. 3 and 5, the locking projections 57, 57 are formed by projecting an arrowhead-like projection in parallel in the recess 55. The locking projections 57 and 57 are locked to locking portions 59 provided at corresponding positions of the side plates 13 and 14 on the short side. The locking portion 59 is configured by providing a long hole 60 in the upper part of the side plates 13 and 14 on the short side and forming the receiving portions 61 of the arrowhead protrusions on both sides of the long hole 60.

  In order to mount the lock member 24 on the upper side of the side plates 13 and 14 on the short side, as shown in FIG. 2, a locking projection 57 is inserted into the long hole 60, and the receiving portion 61 of the arrowhead-shaped projection at the tip is inserted. It only has to be locked to. The locking projection 57 slides up and down in the long hole 60 and does not come off by being locked to the receiving portion 61 of the arrowhead-shaped projection.

  Note that the side plate 13, 14 on the short side is provided with a locking projection 57 on the side plate 13, 14 side so that the relationship between the locking portion 59, 59 and the locking projection 57, 57 is reversed. It is good also as a structure which protrudes 57 and provides the latching | locking parts 59 and 59 in the lock member 24 side. Further, the side plates 13 and 14 and the lock member 24 on the short side may be provided with both the locking portions 59 and 59 and the locking projections 57 and 57 so as to be locked to each other at corresponding positions. .

  Since the locking member 24 and the side plates 13 and 14 are configured to fit the locking projections 57 provided on the other side into the long holes 60 provided on the one side as described above, the side plates 13 and 14 on the short side side are configured. When the operating portion 50 is abutted and pressed from the outside, the locking projections 57 and 57 of the operating portion 50 engage with the locking portions 59 of the side plates 13 and 14 on the short side (see FIG. 2).

  In the above embodiment of the present invention, in order to mount the lock member 24 having the above configuration in the recess 63 of the side plates 13 and 14, the lock member 24 may be pressed against the recess 63 and pressed as it is, so that it is mounted with one touch. Can do. Therefore, damage and deformation of the lock member 24 can be prevented, and automatic assembly by a machine is possible. As described above, the operating portion 50 and the side plates 13 and 14 on the short side are not disengaged by the engagement between the locking portion 59 and the locking projection 57, and can be smoothly slid in the vertical direction. .

  Next, the operation of the lock portion 23 will be described with reference to FIGS. 2, 3, and 6. When assembling the container, first, the opposed side plates 15 and 16 on the long side are erected, and then the side plates 13 and 14 on the short side are erected. When the side plates 13 and 14 are pulled up by holding the upper end portions (the side where the lock member 24 is mounted), the side plates 13 and 14 are turned up around the rotating shaft 18 at the lower end and are raised while drawing an arc on the inner surfaces of the side plates 15 and 16 (FIG. reference).

  When the upper ends of the side plates 13, 14 approach the protrusions 15 a, 16 a of the side plates 15, 16, the engagement protrusions 27 protruding from the tips of the operation portions 50 come into contact with the lower surface of the engagement pieces 33 of the lock lever 25. Further, when the side plates 13 and 14 are rotated, the engaging protrusion 27 and the engaging piece 33 push the engaging piece 33 up by the spring action of the engaging protrusion 27 and the engaging piece 33, and the engaging piece 33 is engaged. The projecting piece 27 is pushed down. At this time, since it is formed in the taper surface which faces downward toward the lower surface 33b distal end surface 33c of the engagement piece 33, it can be slid even with a weak force by the mutual spring action.

  When the engagement protrusion 27 slides on the lower surface of the engagement piece 33 and is positioned on the opposite end surface 33c, the engagement piece 33 is lowered by the spring action of the lock member 24 and the lock lever 25. Therefore, the engaging protrusion 27 and the engaging piece 33 are engaged.

  Further, the engaging portions 40 at both ends of the side plates 13 and 14 are fitted into the concave portions 39 on the inner surfaces of the projecting portions 15a and 16a, and the outer surfaces of the side plates 13 and 14 and the outer surfaces of the projecting portions 15a and 16a become the same surface. . In this way, the container 10 can be easily assembled with one touch only by raising the side plates 15 and 16 on the long side and then raising the side plates 13 and 14 on the short side.

  Next, when the lock state is released and folding is performed, the engagement protrusion piece 27 may be pushed down to release the engagement state with the engagement piece 33. That is, in order to release the engagement state between the engagement protrusion piece 27 and the engagement piece 33, a finger is put into the finger-engaging recess 53 of the lock member 24 and pushed downward against the spring (biasing plate) 51. At this time, the engaging protrusion 27 protruding at the tip is also pushed down, so that the upper surface of the engaging protrusion 27 is pushed below the lower surface of the engaging piece 33 and the locked state is released.

  If the engagement state between the engagement protrusions 27 and the engagement pieces 33 is released, it is possible to tilt the side plates 13 and 14 inward while rotating, as opposed to assembly. Accordingly, if the side plates 13 and 14 are tilted inward while the lock member 24 is pushed down, and the side plates 13 and 14 are tilted, the finger is released from the finger-engaging recess 53 and the push-down is stopped. The lock member 24 returns to the original position by the urging force of 51. Thereafter, the container 10 can be easily folded by tilting the side plates 15 and 16 inward.

The left half of the short side plate showing the assembled container is a front view, and the right half is a cross-sectional view in which a part of the long side plate is omitted. It is a principal part perspective view for demonstrating the assembly state of the side plate of a short side, and the side plate of a long side. It is a principal part perspective view which shows engagement with the engagement piece of the long side side board for demonstrating a locked state, and the engagement protrusion of a lock member. It is a principal part cross-section perspective view which shows the lock lever provided in the long side side board. It is a perspective view which shows the half of a locking member. FIG. 6A shows the operation of the lock portion, FIG. 6A is a cross-sectional view for explaining the state in which the side plate on the short side rises, and FIG. 6B shows the contact state between the engagement protrusion and the engagement piece. FIG. 6C is a cross-sectional view for explanation, FIG. 6C is a cross-sectional view for explanation in a state where the engaging protrusion is engaged with the distal end surface of the engaging piece, and FIG. It is a section for explanation which pushed down and canceled the locked state with engagement piece 33.

Explanation of symbols

10: Assembled synthetic resin container 11: Bottom plate
13, 14: Side plate on the short side
15, 16: Long side side plates 15a, 16a: protrusions
21: Handle hole 23: Lock part
24: Lock member
25: Lock lever 27: Engagement protrusion
30: Plate
31: Through-hole 33: Engagement piece
33a: upper surface 33b: lower surface 33c: tip surface 34: base
35: Cutout hole
37: Base 39: Recess
40: Engagement part 50: Operation part
51: Spring (biasing plate)
53: Recess for finger hook 55: Recess
57: Locking protrusion
59: Locking part 60: Long hole 61: Receiving part 63: Recessed part

Claims (3)

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. It is a synthetic resin container, and is provided with a lock portion comprising a lock lever provided at both ends of one opposing pair of side plates and a lock member attached to the other opposite pair of side plates, Is formed by projecting an engagement piece at the tip of a plate that is cut out on three sides and provided with one side integrally with the side plate, and the lock member is formed from an engagement projection projecting from the operation portion and the tip of the operation portion. A finger hooking recess is provided in the approximate center of the operation unit, and a locking projection is formed in the recess provided on the back side of both ends of the operation unit. The side plate is engaged with the locking projection. The result is provided, the locking portion and the locking projections and the prefabricated synthetic resin container, characterized in that mounted vertically movable locking member to the top of the pair of side plates by engaging a.   The assembly type synthetic resin container according to claim 1, wherein the engaging protrusion of the lock member has an upper surface formed into a tapered surface.   The assembly type synthetic resin container according to claim 1, wherein the engaging piece of the lock lever has a lower surface formed into a tapered surface.

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