JP3097556U - Assembling case - Google Patents

Abstract

An easy-to-use case that seals an opening without using an adhesive member such as a tape and a lid of a molded product to prevent contamination and that can be easily spread on a flat sheet even after the container has been used. I will provide a.
A left and right side plate extending right and left from left and right ends of a bottom plate, front and rear side plates extending forward and backward from a front and rear end of the bottom plate, and left and right side plates respectively. It has intermediate flaps 16 and 17 extending forward and backward, and inner flaps 18 extending forward and backward from the front and rear side plates, respectively. An engagement projection 20 is provided at the tip of the inner flap 18, and the engagement projection is provided on the bottom plate 11. An assembling type case 25 made of plastic cardboard provided with an engagement slit 21 for engaging with 20.
[Selection diagram] Fig. 1

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an assembling case, and more particularly, to a deployable assembling case in consideration of hygiene and box making accuracy.
[0002]
[Prior art]
A tube (laminated or metal) for filling cosmetics, toothpaste, food, paint, chemicals, etc. A case for packing or transporting a large number of the tubes before filling the contents, and a cardboard inside the case There are the following known techniques as a plastic cardboard case that can prevent foreign substances such as paper dust and glue from entering, and can be easily assembled and deployed.
[0003]
FIG. 9a shows the case unfolding body 100 for packaging this tube, and FIG. 9b shows the assembly 109 thereof. First, the unfolded body 100 shown in FIG. 9A includes a bottom plate 101, a pair of left and right side plates 102 and 103 extending left and right from left and right ends of the bottom plate 101, and a pair of front and rear side plates extending front and rear from the front and rear ends of the bottom plate 101. 104 and 105, and a pair of flaps 106 extending forward and backward from the left and right side plates, respectively. An engagement protrusion 107 is provided at the lower edge of the front end of the flap 106, and an engagement slit 108 into which the engagement protrusion 107 can be inserted is formed at a corresponding position on the bottom plate 101. The portion surrounded by the two-dot chain line in the figure surrounded by the front and rear side plates 104 and 105 and the flap 106 is discarded.
[0004]
In this assembly 109, all the fold lines shown by the dashed lines in FIG. Then, the flap 106 is folded inward, and the engaging protrusion 107 provided at the tip portion is inserted into the engaging slit 108 provided on the bottom plate 101 and fixed. After fixing, the ends of the flaps 106 facing each other are fixed with an adhesive tape. Next, the front and rear side plates 104 and 105 are folded so that the flap 106 is on the inside and the front and rear side plates 104 and 105 are overlapped on the outside, and the corner portion of the obtained box, that is, the front and rear side plates 104 and 105 and the right and left side plates 102 adjacent to the side plate are folded. , 103 are fixed with adhesive tape 111 at their ends. Finally, a lid 110 made of plastic or the like is placed over the assembly 109.
[0005]
[Problems to be solved by the invention]
According to the prior art, an adhesive tape is used to assemble the case. However, when such an adhesive tape is used, there are problems in that foreign substances adhering to the tape are mixed, that the number of types of materials increases, that recycling is difficult, and that the assembling operation is complicated. The lid that covers the upper part of the case is a three-dimensional one provided with a flange 110a (see FIG. 9) extending from the upper plate to the side plate of the case, and is separately formed from a plastic sheet by press molding or the like. Even when such a lid is discarded, it is difficult to organize the lid because of its three-dimensional shape, and the lid may be composed of a separate member from the case. The present invention can be assembled without using an adhesive member such as a tape, and prevents foreign matter from being mixed in, and is used as an easy-to-use container that can be fully deployed even after the case and the lid have been used. It is an object of the present invention to provide an expression case and its cover.
[0006]
[Means for Solving the Problems]
The case (Claim 1) of the present invention includes a bottom plate, left and right side plates extending left and right from the left and right ends of the bottom plate via fold lines, respectively, and front and rear sides from the front and rear ends of the bottom plate via fold lines. A front and rear side plate extending rearward, an intermediate flap extending front and rear from a front and rear end of the left and right side plate via a fold line, and an inner flap extending front and rear from a front and rear end of the front and rear side plate, respectively. It is characterized in that the flap is formed of a single plastic sheet in which an engagement projection is provided at the tip and an engagement slit is formed in the bottom plate to engage with the engagement projection.
[0007]
In such an assembling case, it is preferable that the sheet is a plastic cardboard and the fold line is a half-cut line (claim 2). Further, it is preferable that the sheet is a plastic cardboard, and the fold line is a line of a V-shaped groove (claim 3). It is further preferable that such a plastic cardboard case is provided with a drawer piece formed by cutting and raising the front and / or rear side plate (claim 4). Further, it is more preferable that the tip of the engaging projection projects from the bottom plate when assembled. Further, it is preferable that a locking portion for locking the tips of the opposing intermediate flaps when the intermediate flap is vertically bent inward is provided at the tip of the intermediate flap (claim 6).
[0008]
The case with the lid of the present invention is connected to the lower plate, the left and right side walls connected to the left and right ends of the lower plate via the fold line, and connected to the other ends of the left and right side walls via the fold line. An assembling type having a top plate and a tubular outer cover that can be folded flat at the fold line, and a bottom plate and front, rear, left and right side plates that are slidably received in the front and rear of the outer cover. It comprises a box-shaped main body, and the outer cover and the main body are each formed of one plastic sheet (claim 7). In such a case with a lid, it is preferable that the outer cover is a plastic cardboard and the fold line is a half-cut line (claim 8). In such a case with a lid, it is preferable that the outer cover is a plastic cardboard and the fold line is a line of a V-shaped groove (claim 9).
[0009]
As the main body of such a case with a lid, the above-described assembled case of the present invention can be used (claim 10). Further, it is preferable that the main body includes a drawer (claim 11). Furthermore, it is preferable that the main body is provided with an engagement projection protruding from the bottom plate (claim 12). In such a case with a lid, it is preferable that flaps covering the upper portions of the front plate and the rear plate of the main body extend from front and rear of the upper plate via a fold line (claim 13). Further, it is preferable that the outer cover be provided with a joining plate whose end portion is adhered to the outside when the outer cover is bent into a cylindrical shape (claim 14).
[0010]
[Effects of action and invention]
In the case of the present invention, the left and right side plates and the front and rear side plates are bent along the fold line, the intermediate flaps are bent inward, and the intermediate flaps are extended from the front and rear side plates and the front and rear side plates. By folding the inner flap so as to be sandwiched between the inner flap and the engaging projection of the bent inner flap is engaged with an engaging slit provided on the bottom plate, the inner flap can be assembled in a box shape. Therefore, the left and right side plates and the front and rear side plates can be fixed at the same time by the engagement protruding pieces, and can be assembled without using a tape or the like. Since an adhesive such as a tape is not used, it is easy to assemble or unfold into one sheet. Further, since the inner flap uses a portion that has been conventionally discarded (see FIG. 9A), the material is not excessively used.
[0011]
When the case is made of plastic cardboard (hereinafter referred to as "pladan") and the fold line is a half-cut line (claim 2), it is easy to bend. Furthermore, when the plate is bent, the bending radius of the bent portion is reduced, and the accuracy of box making when assembling is improved. Further, when the sheet is made of plastic and the fold line is a line of a V-shaped groove (claim 3), the sheet can be bent in a direction in which the V-shaped opening and a direction in which the V-shaped groove is closed. When bending in the direction in which the V-shape opens, the bending radius of the bent portion can be reduced. On the other hand, when the V-shaped groove is bent in the closing direction, since the open surfaces of the V-shaped groove are bent so as to be in contact with each other, the pressure resistance when the bent portion is pressed from above is improved.
[0012]
Also, in the assembled case of the present invention, as described above, since the intermediate flap is formed between the front and rear side plates and the inner flap, the front or rear side plate disposed outside has a part thereof. Even if the drawer piece is cut and raised (claim 4), the inner flap does not impair the sealing performance inside the case. Therefore, the drawer piece can be formed while maintaining the airtightness, and the inner box can be easily carried. Since the drawer piece is also integral with the case, there is no need to remove or attach the drawer piece during assembly or deployment. Furthermore, since they are formed of the same member, the labor required to separate them during recycling can be reduced.
[0013]
Further, if the engaging pieces provided for fixing the front and rear side walls are formed so as to protrude from the bottom plate (claim 5), when they are placed on the floor or stored in a tubular outer cover described later, Since the bottom plate is raised to reduce the area in contact with the floor, friction during sliding is small. Therefore, it can be easily pulled out and stored. In addition, foreign substances such as dust accumulated on the floor are prevented from being mixed, and moisture is further prevented. Further, when the intermediate flap is bent inward, engaging portions are provided at the opposite end portions to engage with each other (claim 6), so that the side plate of the Pradan case is further pressed from above toward the bent portion. Strength when pressed (pressure resistance strength) can be improved. Therefore, even when a load such as a content is applied to the left and right side plates, the load can be supported. Therefore, it is possible to prevent the contents from falling down in the prdan case at the time of transportation and the like, and also prevent the contents from hitting each other and being damaged.
[0014]
Further, in the case of using an outer cover that houses the box-shaped main body slidably therein (claim 7), the entire box-shaped main body can be covered, so that the dust-proof effect is large. Further, since the cover is formed by assembling a plastic sheet, the cover can be manufactured at a lower cost than the cover described in the conventional example (see FIG. 9B). Further, when the fold line of the outer cover is formed by half-cutting similarly to the case (claim 8), the bending radius of the bent portion is small, and the sliding between the case and the outer cover slides inside the case. Since there is no extra space between the surfaces, there is no accumulation of foreign matter, which makes the device more sanitary. In the case where the fold line of the outer cover is formed by a V-shaped groove similarly to the case (claim 9), when the V-shaped opening is bent as described above, the bending radius of the bent portion becomes small, Since there is no extra space between the case that slides inside the case and the sliding surface with the outer cover, foreign matter does not accumulate. When the V-shape is bent in the closing direction, the pressure resistance of the bent portion is improved. When the box-shaped main body is an assembling case (claim 10), both the case and the outer cover can be folded until they become plate-shaped, so that they do not take up space during storage and transport.
[0015]
When the case is provided with a drawer (claim 11), it is easy to pull out the case from the outer cover. In the case where the engaging projections protrude from the bottom plate of the case (claim 12), when the case is pulled out from the outer cover, the sliding friction is reduced, making the case easier to pull out. Further, when the flap extends from the upper plate of the outer cover, foreign matters are prevented from being mixed into the case, so that the dustproof effect is further enhanced. Also, when the outer cover is assembled, the joining surface is arranged outside the case, so that no extra space is taken when the case is stored inside. Therefore, foreign matter such as dust does not accumulate in that portion, which is sanitary (claim 14).
[0016]
[Embodiment of the invention]
Next, an embodiment of the assembly type case of the present invention will be described with reference to the drawings. 1A is a development view showing an embodiment of the case of the present invention, FIG. 1B is a perspective view showing an assembled state of the case, and FIG. 2A is a perspective view showing an embodiment of the prada used in the case of the present invention. 2b is a cross-sectional view taken along the line AA, FIG. 3a is a perspective view showing an example of a method of bending the prdan, FIG. 3b is a perspective view showing another example of the bending method, FIG. 4a is a slope view showing a V-shaped groove, 4B is a cross-sectional view taken along the line BB of FIG. 4A, FIG. 4C is a perspective view showing an example of bending with a V-shaped groove, FIG. 4D is a perspective view showing another example of bending with a V-shaped groove, and FIG. 6a is a cross-sectional view taken along line CC of FIG. 1b, FIG. 6b is a cross-sectional view showing another example of FIG. 6a, and FIG. 6c is a schematic view when a part of FIG. 6b is developed. FIG. 7A is a cross-sectional view, FIG. 7A is a plan view showing another embodiment of the prdan case of the present invention, and FIG. 8A is a development view of an embodiment of the outer cover according to the present invention, FIG. 8B is a perspective view showing an assembled state of the outer cover, and FIG. 8C is DD in FIG. 8B. It is a schematic process drawing which shows a mode that a schematic cross section is folded.
[0017]
First, referring to FIG. 2, the pradan used in the present invention will be described. The material of the pradan used in the present invention is, for example, polypropylene, and is a plate-like member having a hollow portion integrally formed by extrusion. The plate-shaped member 1 comprises a first surface 3, a second surface 4, and a core 5 between the two surfaces, which is arranged perpendicular to each surface and parallel to each other. Can be used. A rectangular section in section surrounded by the first surface 3, the second surface 4, and the two cores 5 is the hollow portion 2 (see FIG. 2B). In the present invention, this plate-shaped member is bent along the half-cut fold line obtained by cutting one of the first surface 3 and the second surface 4 with the other surface inward. By doing that. In addition, by bonding a material such as a highly foamed PE sheet or a non-static woven fabric to the first surface 3 and the second surface 4 of the plate-like member, the physical properties of the surface are changed to perform various functions. Additions can also be used.
[0018]
As shown in FIG. 3A, a first bending method in which a cut is made in one surface in parallel with the core 5 and the other surface is bent inward as shown in FIG. There is a second folding method in which a cut is made in one surface and the core 5 and the other surface is bent inward. In the case of the first bending method, the opening of the hollow portion 2 is hidden by the core 5 because the cut portion 6a of the bending is cut in parallel with the core 5. On the other hand, since the bent portion 9a is not supported by the core 5, the pressure resistance of the bent portion 9a is weak. In the case of bending by the second bending method, since the cut portion 6b of the bending is cut perpendicularly to the core 5, the opening of the hollow portion 2 communicates with the opening end. Since it is supported by the core 5, the bending strength of the bent portion 9b is high, and the box making accuracy is also good.
[0019]
Next, an embodiment of the case of the present invention will be described with reference to FIG. The deploying body 10 of FIG. 1A is composed of a single platen, and has a bottom plate 11, a left plate 12 extending left and right from the left and right ends thereof, a right plate 13, and a front plate extending forward and backward from the front and rear ends of the bottom plate 11. It has a side plate 14 and a rear side plate 15. The fold line indicated by the one-dot chain line is constituted by the half cut described above. Above and below each of the left and right side plates 12, 13, an intermediate flap is continuous. That is, a pair of intermediate flaps 16a and 16b are continuous above and below the left side plate 12 via the fold line, and a pair of intermediate flaps 17a and 17b are continuous above and below the right side plate 13 via the fold line. ing. Further, an inner flap 18a is provided below the front plate 14 and an inner flap 18b is provided above the rear plate 15 via a fold line.
[0020]
Engagement projections 20a, 20b are provided at the center of the distal ends of the inner flaps 18a, 18b, respectively. At the front and rear ends of the bottom plate 11, engagement slits 21a and 21b are provided to engage with the engagement projections 20a and 20b, respectively. These engagement projections 20 are pierced and fixed to the engagement slit 21 in an assembly step (S2) described later. That is, the intermediate flaps 16 and 17 are bent so as to be sandwiched between the front and rear side plates 14 and 15 and the inner flaps 18a and 18b, and then the engaging projections 20 provided on the inner flaps 18a and 18b are To fix the whole. At this time, the dimension of the slit of the engagement slit 21 is set slightly smaller than that of the engagement projection 20 so that the engagement projection 20 can be strongly engaged with the engagement slit 21. You can also.
[0021]
The front side plate 14 is formed with a handle 19 which can make two large and small U-shaped cuts in itself and bend up at the ends of the cuts. Inside the smaller U-shaped portion of the handle 19, a stepped portion 19a cut out in a rectangular shape and provided near the bent portion of the front side plate 14 and the bottom plate 11 beyond the bent portion of the handle 19 is provided. There is. At the upper part of the larger U-shape, there is an outlet 19b cut out in an arc shape. Even if the handle 19 is formed by making a cut in the side plate 14, the inner flap 18a can be formed without impairing the hermeticity of the case because the inner flap 18a is further disposed inside. Also, a finger can be inserted into the step portion 19a, the handle 19 can be pulled out from the lower side of the U-shape, and the Pradan case can be pulled out as it is. At this time, it is easy to put out a finger from the drawer port 19b and take it out. The punching of the developed body 10 of the plate-shaped member 1 formed in this way and the cutting of the half cut are simultaneously performed by a punching die or the like. In this embodiment, the fold line is a half-cut line, but may be a V-shaped groove line described later.
[0022]
Next, a process of assembling the unfolded body 10 to an assembly (pladan case) 25 shown in FIG. 1B will be described with reference to FIG. First, left and right side plates 12 and 13 extending right and left from the left and right ends of the bottom plate 11 are vertically folded in the same direction. Here, the direction of the opening of the hollow portion 2 of the bottom plate 11 communicates from the front plate 14 to the rear plate 15. As shown in FIG. 3A or FIG. 3B, the direction of the communication is determined in consideration of the pressure resistance at the cut portion, the area of the opening, and the like, and the weight of the contents and the front and rear side plates 14, 15 and the left and right side walls 13, It is determined by the ratio of the lengths of 12 and the like. Returning to FIG. 5, the intermediate flaps 16 and 17 are then bent inward (S1).
[0023]
Next, the front and rear side plates 14, 15 extending front and rear from the front and rear ends of the bottom plate 11 are vertically bent so as to overlap the intermediate flaps 16, 17 in the same direction as the left and right side plates 12, 13. Then, the inner flaps 18a, 18b extending from the leading ends are bent inward so as to be sandwiched between the inner flaps 18a, 18b and the front and rear side plates 14, 15. After being bent, the engaging projections 20a, 20b provided at the tip portions of the inner flaps 18a, 18b are engaged with the engaging slits 21a, 21b provided in the bottom plate 11 (see FIG. 6A). At this time, the distal ends of the engaging pieces 20a and 20b are fixed in a state of protruding from the engaging slits 21a and 21b (S2). By arranging the intermediate flaps 16 and 17 in this manner, the left and right side plates 12 and 13 are fixed, and the load due to the contents can be firmly supported. FIG. 6B shows that the bending lines of the front and rear side plates 14, 15 and the inner flaps 18a, 18b are V-groove lines described later (FIG. 4d). By doing so, the hollow portion 2 opened above the prdan can be closed as described later, so that sedimentation of foreign matter such as dust can be prevented. The fold line at this time is a combination of the line of the half cut 35 and the line of the two V-shaped grooves 34 as shown in FIG. 6C. Even if the two types of fold lines are combined in this manner, the fold lines are formed on the same surface of the prada, so that the processing is easy.
[0024]
Further, in order to protrude from the engagement slit 21 and fix the engagement protrusion 20, the bottom plate 11 of the assembly 25 is raised by the engagement protrusion 20 protruding from the bottom plate 11. For this reason, since the contact area where the bottom plate 11 is directly in contact with the floor or the like is small, sliding friction when pulling out or storing is small. Furthermore, since the floor is raised and is not in contact with the floor, it is sanitary and prevents foreign substances such as dust from being mixed. The raised level also protects the assembly and its contents from moisture.
[0025]
Finally, a finger is hooked on the handle 19 from the step portion 19a, and the handle 19 is pulled outward and bent. At this time, if it is difficult to pull out the handle 19, the user may put his / her finger on the handle outlet 19 b to take out the handle 19 from above and assist in bending the handle 19. Then, it is convenient to pull out the assembly 25 for use or push it back to store it. In FIG. 1A, the handle 19 is provided on the front side plate 14, but the handle 19 can be formed on the rear side plate 15 in the same manner as shown in FIG. Then, you can place your fingers on both sides and lift with both hands.
[0026]
Next, when the assembly 25 is deployed, the assembly is deployed in the order from S2 to S1 in a process opposite to that of FIG. First, in step S2, the engaging projection 20 is pulled out of the engaging slit 21, the inner flap 18 is raised upward, and the front and rear side plates 14, 15 are both opened outward (S2). Next, the intermediate flaps 16a, 16b, 17a, 17b and the left and right side plates 12, 13 are turned outward to form the developed body 10 (S1). The handle 19 formed by being pulled out from the front and rear side plates 14 and 15 is also stored in the front and rear side walls 14 and 15 by pushing it back to the step portion 19a. For this reason, even after the use of the Pradan case, the handle 19 does not become an obstacle, and space is saved when the deployable bodies 10 are stacked and stored or transported as a returnable container.
[0027]
The bending radius of the assembly 25 thus formed is small because the bending line is a half-cut line. For this reason, the accuracy of box making is improved, and when the contents are stored, the boxes can be neatly arranged up to the bent portion. The stored items can be arranged up to the corners inside the case, and they can be arranged neatly. Even when the contents are stored in the case, no excessive load is applied to the side plate of the case. At times, it is possible to prevent the contents from falling down. Further, since an adhesive such as a tape is not used, it is possible to prevent foreign substances adhering to the tape or the like from being mixed. Also, when the sheet is unfolded to the original plate-like member, the adhesive member such as a tape does not generate as dust. Also, when the assembly 25 is discarded, since it is all formed of the same member, it can be discarded as it is, and the complexity of sorting and collecting at the time of recycling can be reduced.
[0028]
Next, another embodiment of the case of the present invention will be described. Since this embodiment is almost the same as the above-described embodiment, the same portions are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 7A, of the intermediate flaps, an engagement convex portion 22a is provided at the tip of the left rear intermediate flap 16b and the right front intermediate flap 17a, and the left front intermediate flap 16a and the right rear intermediate flap 17b are provided. An engagement recess 22b that engages with the engagement protrusion 22a is provided at the distal end. The engaging projection 22a is a small piece extending from the front end of the intermediate flap, and the width of the small piece is gradually increased from the intermediate flap toward the front end. The engaging concave portion 22b is formed by cutting out the tip of the intermediate flaps 16a, 17b into a shape that engages with the engaging convex portion 22a.
[0029]
The engaging protrusion 22a and the engaging recess 22b formed in this manner are newly added at the above-described assembling step (S1) as the assembling step (S1 ') shown in FIG. 7B. In the assembling step S1 ', when the intermediate flaps 16a and 17b are bent inward, the engagement projections 22a of the front end portions of the intermediate flaps which are arranged to face each other are engaged so as to be fitted from above the engagement recesses 22b. Since the engaging convex portion 22a becomes wider as approaching its tip, after being engaged with the engaging concave portion 22b, even if the engaged intermediate flaps are pulled, they cannot be easily removed. Therefore, even when a load such as a content is applied to the left and right side plates 12 and 13, it can withstand the load.
[0030]
Next, the outer cover used in the case with a lid according to the present invention will be described. FIG. 8a shows the outer cover deployment body 26. The unfolded body 26 includes a lower plate 27, a left side wall 28 extending leftward through a fold line at the left end of the lower plate, a right side wall 29 extending rightward through the fold line from the lower plate, and a right side wall 29. An upper plate 30 extends rightward through the fold line, a joining plate 31 extends rightward from the upper plate 30 via the fold line, and a flap 32 extends back and forth from the upper plate 30 via the fold line. The lower plate 27, the left side wall 28, the right side wall 29, and the upper plate 30 are each vertically bent inward, and the bonding plate 31 is bonded outside the left side wall 28 to form an outer cover 33 (FIG. 8B).
[0031]
The bending line of the outer cover is a V-shaped groove line as shown in FIG. 4A. To form such a V-shaped groove, a heating press or a heating roller is used, and the bending line is formed as a thermal ruled line. Here, FIG. 4B is a sectional view taken along line BB of the V-shaped groove of FIG. 4A. The first surface 3 is softened by heating to form a V-shaped groove. At this time, since the hollow portion 2 is closed by the softened first surface 3 as shown in FIG. 4A, the hollow portion 2 can be hermetically sealed without bending in the closing direction of the V-shape as described above. . Therefore, foreign matter such as dust does not enter the hollow portion 2 and is sanitary. In addition, there are two types of bending of such a V-shaped groove, and the V-shaped groove can be bent in the opening direction and the closing direction. In the case of bending in the direction in which the V-shape opens (FIG. 4D), the bending radius of the bent portion 9c can be reduced. On the other hand, when the V-shape is bent in the closing direction (FIG. 4C), since the bent portion 9d is arranged outside and the hollow portions 2 are bent so as to abut each other, the bent portion has high pressure resistance. Even if the fold line is cut in a V-shape without using a thermal ruled line, the fold line can be bent in the opening direction and the closing direction of the V-shape as described above. However, since the hollow portion 2 is exposed in the cutout portion, it is preferable to bend the hollow portion 2 so as to be sealed as shown in FIG. 4C. Further, the fold line of the outer cover deploying body 26 formed in this manner is a line of a V-shaped groove, but may be a half-cut line as described above.
[0032]
Returning to FIG. 8, since the outer cover 33 adheres the joining plate 31 to the outside of the left side wall 28 to form a tube, there is no extra step inside the tube. Therefore, as shown by the two-dot chain line in FIG. 8B, the above-mentioned assembly 25 can be smoothly put in and taken out inside the cylindrical shape. Further, since there is no extra gap between the cylindrical inside and the assembly 25, foreign matters such as dusts are prevented from accumulating in that portion, which is sanitary. It is preferable that the outer cover 33 be bonded by heat without using an adhesive or an adhesive tape. This saves time and effort for separate collection when recycling or discarding. Note that a hot-melt adhesive containing the same material as the outer cover 33 as a main component can also be used.
[0033]
As shown by the imaginary line in FIG. 8B, the case assembly 25 is slidably housed inside the outer cover 33 so that the case assembly 25 can be pulled out at any time by using the above-described handle 19 when necessary. Further, since the flap 32 covers the upper opening of the assembly 25, dust and the like are prevented from settling and entering the inside of the assembly 25. Further, since the bottom of the assembly 25 is raised by the engagement projections 20, the sliding friction between the bottom plate 11 and the lower plate 27 of the outer cover 33 is reduced. Also, when the direction of the center of the bottom plate 11 and the center of the lower plate 27 is made to coincide with the direction of sliding, the assembly 25 can be pulled out using the handle 19 with even less force. Conversely, when the assembly 25 and the outer cover 33 are provided so that the direction of the center is perpendicular to the sliding direction, the assembly 25 and the outer cover 33 are difficult to slide, and the assembly 25 and the outer cover 33 may be displaced due to vibration during transportation. And a highly sealed container is prevented.
[0034]
The above-described half-cut line may be used as the bending line of the outer cover 33. In the case of half-cutting, it is preferable to use the second bending method in which the pressure resistance of the bent portion is large. When the V-shaped groove (FIG. 4D) is used, one of the left and right side walls of the outer cover 33 can be folded down by pushing down one side wall (FIG. 8C). For this reason, after use, the outer covers 33 can be stacked and arranged, so that the transport efficiency is high even as a returnable container. Also, when discarded, it can be folded up in a plate shape and discarded, so it looks good even if it is left in the disposal place. Note that the outer cover 33 can be formed by bending the outer cover 33 in a direction in which the V-shape of the outer cover 33 closes (FIG. 4C). In this case, the side walls cannot be pushed down, but the pressure resistance is high, and several stages can be stacked in a state where the assembly 25 containing the heavy contents is slidably stored inside the outer cover 33. .
[0035]
Further, in this embodiment, as shown in FIG. 4, the V-shaped groove is provided in a direction perpendicular to the core 5, but the V-shaped groove is formed in parallel with the core 5 as in the case of the half cut described above. Can be provided. In that case, the pressure resistance of the bent portion becomes weak. However, if the deployable body 10 is formed by punching out the deployable body 10 with a press die or the like so that the bending lines of the deployable bodies 10 and 26 are formed at an angle of, for example, 45 degrees with the center core 5 of the Pradan, the bending position as described above, for example, the bottom plate The core 5 is similarly arranged at the fold line between the side wall 11 and the left and right side walls 12 and 13 and the fold line between the front and rear side walls 14 and 15 and can be bent with the same pressure resistance.
[0036]
As described above, according to the present invention, the sliding friction between the assembly 25 and the outer cover 33 and the direction of the center core 5, the half cut, and the V-shaped groove determine the weight of the contents stored in the container, the required hermeticity. The most suitable one can be selected in consideration of conditions such as the number of stacks at the time of transportation or sorting.
[Brief description of the drawings]
FIG. 1a is a developed view showing an embodiment of a prdan case of the present invention, and FIG. 1b is a perspective view showing an assembled state thereof.
FIG. 2A is a perspective view showing an embodiment of a pradan used in the present invention, and FIG. 2B is a cross-sectional view taken along the line AA.
FIG. 3A is a perspective view showing an example of a bending method of a pradadan, and FIG. 3B is a perspective view showing another example of a bending method.
4A is a perspective view showing a V-shaped groove, FIG. 4B is a cross-sectional view taken along the line BB of FIG. 4A, FIG. 4C is a perspective view showing a bent example of the V-shaped groove, and FIG. It is a slope view showing other examples of bending.
FIG. 5 is a schematic assembly process drawing of the case shown in FIG. 1b.
6A is a sectional view taken along the line CC of FIG. 1B, FIG. 6B is a sectional view showing another example of FIG. 6A, and FIG. 6C is a schematic sectional view when a part of FIG. 6B is developed.
FIG. 7A is a plan view showing another embodiment of the case of the present invention, and FIG. 7B is a schematic assembly process diagram showing the assembly process.
8A is a developed view showing an embodiment of the outer cover according to the present invention, FIG. 8B is a perspective view showing an assembled state of the outer cover, and FIG. 8C is a schematic cross-sectional view of FIG. It is a schematic process drawing which shows a mode that it is performed.
FIG. 9A is a developed view showing an example of a conventional case, and FIG. 9B is a perspective view showing an assembled state of the case.
[Explanation of symbols]
1 plate member
2 hollow part
3 First side
4 Second side
5 core
6a Notch
6b Notch
9a bent part
9b bent part
10 unfolded body
11 Bottom plate
12 Left side plate
13 Right side plate
14 Front plate
15 Rear plate
16a Intermediate flap (front left)
16b Intermediate flap (left rear)
17a Intermediate flap (right front)
17b Intermediate flap (right rear)
18a Inner flap (front)
18b Inner flap (rear)
19 Handle
19a Step part
19b Handle outlet
20a Engagement projection (front)
20b Engagement projection (rear)
21a Engagement hole (front)
21b Engagement hole (rear)
22a engaging projection
22b engagement recess
25 assembly (plastic cardboard case)
26 Deployment
27 lower plate
28 Left side wall
29 Right side wall
30 Upper plate
31 Joining plate
32 flaps
33 outer cover
34 V-shaped groove
35 half cut
S1 First step
S2 Second step
100 unfolded body
101 Bottom plate
102 Left side plate
103 Right side plate
104 Front side plate
105 Rear plate
106 flap
107 engaging projection
108 engagement slit
109 Assembly
110 lid
110a Tsuba
111 tape

Claims (14)

A bottom plate,
Left and right side plates extending left and right from the left and right ends of the bottom plate via fold lines,
Front and rear side plates respectively extending front and rear from the front and rear ends of the bottom plate via fold lines,
Intermediate flaps extending front and rear from the front and rear ends of the left and right side plates via fold lines, respectively.
An inner flap extending forward and backward from the front and rear ends of the front and rear side plates, an engagement protrusion is provided at a tip of the inner flap, and an engagement slit for engaging the engagement protrusion is formed in the bottom plate. Assembling type case made of one plastic sheet. The case according to claim 1, wherein the sheet is a plastic cardboard, and the fold line is a half-cut line. The case according to claim 1, wherein the sheet is a plastic cardboard, and the fold line is a line of a V-shaped groove. The case according to claim 1, further comprising a drawer provided by cutting and raising the front and / or rear side plate. The case according to claim 1, 2, 3, or 4, wherein a tip end of the engagement protrusion projects from the bottom plate when assembled. The locking portion for locking the tips of the opposing intermediate flaps when the intermediate flap is bent inward vertically vertically is provided at the tip of the intermediate flap. Case. Lower plate,
Left and right side walls connected to the left and right ends of the lower plate via fold lines,
A tubular outer cover having an upper plate connected to the other end of each of the left and right side walls via a fold line, and capable of being folded flat at the fold line;
It is composed of an assembled box-shaped main body having a bottom plate and front, rear, left and right side plates that are slidably received in the front and rear of the outer cover,
An assembled lidded case, wherein the outer cover and the main body are each formed from one plastic sheet. The case with a lid according to claim 7, wherein the outer cover is a plastic cardboard, and the fold line is a half-cut line. The case with a lid according to claim 7, wherein the outer cover is a plastic cardboard, and the fold line is a line of a V-shaped groove. The case with a lid according to claim 7, 8 or 9, wherein the main body is the case according to claim 1, 2, 3 or 6. The case with a lid according to claim 7, wherein the main body is the case according to claim 4. The case with a lid according to claim 7, wherein the main body is the case according to claim 5. The case with a lid according to claim 7, 8, 9, 10, 11, or 12, wherein flaps covering upper portions of a front plate and a rear plate of the main body extend from front and rear of the upper plate via a fold line. 14. The case with a lid according to claim 7, further comprising a joining plate having a sheet end bonded to the outside when the outer cover is bent into a cylindrical shape.

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