JP7157467B2 - Fixed structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure in which a cushioning material is attached and fixed to the surface of a container made of a relatively thin plate material with low stiffness, such as a transport container made by vacuum forming a plastic sheet.

In vacuum forming, the conveying container is formed by softening a plastic sheet with heat, putting it on a mold, sucking the air, and sticking it to the mold, cooling it, and removing unnecessary parts with a cutting die blade. Such transport containers are widely used because the cost of production equipment is low, productivity is high, large-sized containers can be molded relatively easily, and trial production and setting of new products does not take much time. .

When items to be packed are stored in such a transport container, a receiving material is sometimes fixed to the surface of the transport container as a cushioning material in order to protect the items to be packed. FIG. 6 shows an example in which the transfer container 10 (for example, the lid) is formed from a plastic sheet by vacuum forming, and the receiving material 20 is fixed to this. A double-sided tape 30 (or an adhesive) is used to fix the receiving material 20 , but a vacuum-formed product with a flat surface is not compatible with the double-sided tape 30 . In addition, if silicone resin is applied to the surface of the plastic sheet to improve releasability from the mold, the adhesive force will be further weakened. When a force such as a twist F1 is applied to the transport container 10, the receiving material 20 falls off relatively easily. In addition, foreign matter easily adheres to the adhesive of the double-sided tape 30 (or adhesive), and there is a possibility that the foreign matter may spread to the packed items accommodated in the transport container 10 .

Furthermore, if the receiving material is fixed using double-sided tape or adhesive, it is necessary to remove the double-sided tape or adhesive from the plastic sheet when discarding the transport container, which tends to hinder recycling of plastics.

As a method of fixing the receiving material to the pedestal made of cardboard or the pedestal made of a hard material such as plastic without using an adhesive, for example, as disclosed in Patent Document 1, the receiving material is fixed to the pedestal by an elastic member fixing structure. It is known to fix the In this elastic member fixing structure, the pedestal and the elastic member are provided with insertion portions communicating with each other, the pair of projections of the first fixing member are inserted into these insertion portions from the back side of the pedestal, and the second fixing is performed. The member is inserted into these insertion portions from the elastic body side. The second fixing member is fitted between the pair of protrusions to widen the gap between them, so that the pair of protrusions are pressed against the side surface of the insertion portion of the elastic member and fixed.

As another fixing method, Patent Document 2 discloses a fitting structure for attaching a decorative member from the front and back of an automobile panel. Moreover, Patent Document 3 discloses a snap rivet for the purpose of fastening, fixing, or pinching a plate-like material.

JP-A-2005-163930 Japanese Utility Model Laid-Open No. 3-28052 Japanese Utility Model Laid-Open No. 56-135527

When the receiving material is formed by injection molding, the receiving material can be formed in any desired shape. is cut into strips by one press cutting. Therefore, in the strip-shaped receiving material cut out, the part that was the surface of the original plate material is flat, and the surrounding side surfaces are formed into a shape punched out by the punching blade (Thompson blade) of the press. there is

According to the elastic member fixing structure of Patent Document 1, it is necessary to provide an insertion portion communicating with the pedestal and the elastic member. In the case of cutting out into strips by a single stamping press cutting, the insertion portion on the side of the elastic member can only be obtained in a groove-like shape that continues from one surface of the elastic member to the other surface. Impossible for fixed use. Further, performing the second press cutting to provide the insertion portion inevitably increases the number of man-hours significantly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an elastic member fixing structure capable of fixing a receiving material punched into strips by a single press cutting to a conveying container without using an adhesive.

The fixing structure of the present invention includes a product contact surface, a pair of flat and mutually parallel surfaces in contact with both sides of the product contact surface, a gap cut through between the pair of surfaces, and the a strip-shaped receiving material having a fixing surface facing the product contact surface;
a conveying container having a pair of mounting holes drilled at intervals corresponding to the distance between the pair of surfaces;
a first engaging piece having a base and a pair of wall portions protruding from the base;
a second engagement piece provided with a pair of parallel holes in the girder,
The second engaging piece is inserted into the gap of the receiving member, and the pair of parallel holes are set so as to appear outside the pair of surfaces, respectively, and the pair of wall portions are arranged to connect the pair of wall portions. are inserted into the mounting hole and the pair of parallel holes in this order, and the first engaging piece and the second engaging piece are joined together;
The gap of the receiving material is provided with a vertical gap portion cut through between the pair of surfaces reaching the fixing surface,
A central hole is provided between the pair of mounting holes of the transport container,
The first engaging piece is provided with a cylindrical portion that protrudes from the base portion, is composed of a plurality of circular arc columns, and has a fitting portion inside the circular arc in the middle of the length,
The second engaging piece protrudes from the girder and has a neck on the girder side and an enlarged portion at the tip. is provided with a protrusion that locks
The protruding portion is inserted into the vertical gap of the receiving member, the cylindrical portion is inserted into the central hole and the vertical gap in this order, and the cylindrical portion and the protruding portion are locked to each other. Characterized by
Further, the fixing structure of the present invention includes a product contact surface, a pair of flat and mutually parallel surfaces in contact with both sides of the product contact surface, and a gap cut through between the pair of surfaces. , a strip-shaped receiving member having a fixing surface facing the product contact surface;
a conveying container having a pair of mounting holes drilled at intervals corresponding to the distance between the pair of surfaces;
a first engaging piece having a base and a pair of wall portions protruding from the base;
a second engagement piece provided with a pair of parallel holes in the girder,
The second engaging piece is inserted into the gap of the receiving member, and the pair of parallel holes are set so as to appear outside the pair of surfaces, respectively, and the pair of wall portions are arranged to connect the pair of wall portions. are inserted into the mounting hole and the pair of parallel holes in this order, and the first engaging piece and the second engaging piece are joined together;
The pair of wall portions are provided with recesses, and the parallel holes of the second engaging pieces are provided with hooks that are caught in the recesses.

According to the present invention, the pair of wall portions pass through the girder portion of the second engaging piece and the pair of parallel holes provided in the conveying container, whereby the first engaging piece and the second engaging piece are attached to the conveying container. The pair of walls sandwiches the receiving material in the thickness direction, and the girder is accommodated in the horizontal gap of the receiving material, thereby separating the conveying container and the receiving material. are preventing you from doing it. Due to such a fixing structure, the receiving material is less likely to come off from the conveying container, which is a vacuum-formed product without stiffness, and the receiving material can be fixed to the conveying container without using an adhesive or the like.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the fastener which concerns on a present Example, FIG. 1A is a perspective view of a 1st, 2nd engagement piece, and FIG. 1C is a perspective view of a state in which the first and second engaging pieces are fitted, and FIG. 1D is a cross-sectional view of the fitted state. 2A is a diagram showing a state in which a first engaging piece is attached to a receiving material; FIG. 2B is a diagram showing a state in which a second engaging piece is attached to a conveying container; FIG. 2C is a sectional view; FIG. 2D is a diagram showing how the fastener prevents the receiving member from falling. It is a figure which shows the fitting state of the 2nd engagement piece and the 1st engagement piece seen from the back side of a conveyance container. It is a figure which shows the shape of the insertion part provided in a conveyance container, and an effect|action. It is a diagram showing another embodiment, It is a figure which shows the conventional conveyance container.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The fixing structure of this embodiment does not increase the number of processes for manufacturing the receiving material by the fastener 1 consisting of the first and second engaging pieces, and newly increases the number of processes for the vacuum-formed transfer container. It can be suitably used when fixing the receiving material to the vacuum-formed transport container without any need.

First, the fastener 1 will be described with reference to the drawings. 1A and 1B, the fastener 1 consists of a first engaging piece 100 and a second engaging piece 200. As shown in FIG. These are, for example, injection molded plastics. The first engaging piece 100 includes a flat plate-shaped base portion 110, a cylindrical portion 120 projecting from the upper surface of the base portion 110, and a pair of wall portions 130 projecting from the upper surface of the base portion 110 at symmetrical positions of the cylindrical portion 120. and The tubular portion 120 includes four arcuate columns 120a-120d that give the tubular portion 120 the appearance of a cross-shaped piece of bamboo. A cavity 112 extending in the length direction d of the cylindrical portion 120 located at the center of the cylindrical portion 120 forms a through hole 111 penetrating through the lower surface of the base portion 110 . Fitting portions 121a-121d protruding toward the center of the cavity 112 are provided on the inner sides of arcs in the middle of the lengths of the arc-shaped columns 120a-120d. The projection-side surfaces 131 of the pair of walls 130 are parallel to each other with an interval W1 therebetween.

The fitting portions 121a-121d of the arc columns 120a-120d are arranged at the same position in the direction d so as to face each other. Fitting portions 121a to 121d have tapered surfaces 122a to 122d that are tapered toward the base portion 110 at the distal end side of the cylindrical portion 120 so as to approach each other. On the other hand, on the root side of the base portion 110, the fitting portions 121a-121d are formed into surfaces 123a-123d (surfaces in which the protruding portions are roughly sliced in the radial direction) such that they are sharply separated from each other.

The second engaging piece 200 includes a flat plate-shaped girder portion 210, a protrusion 220 projecting from the upper surface of the girder portion 210, and a flat plate-shaped girder portion 210 provided at a symmetrical position of the protrusion 220. and a pair of parallel holes 211 . The protrusion 220 is formed to fit into the cavity 112 of the tubular portion 120 . That is, the bulging portion 221 has a bulging portion 221 provided on the tip side of the protrusion 220 and a neck portion 223 provided between the bulging portion 221 and the girder portion 210. , and the bulging portion 221 and neck portion 223 meet to form a radial surface 224 that substantially slices the protrusion 220 radially. The size of the pair of parallel holes 211 is determined so that the wall portion 130 can pass through when the projection portion 220 is fitted into the cavity 112 of the cylindrical portion 120, and the interval W2 is equal to the interval W1. . When the wall portion 130 penetrates through the parallel hole 211 and a force acts to cause the wall portion 130 to collapse, the girder portion 210 supports it.

In FIG. 1B, bulging portion 221 abuts tapered surfaces 122a-122d to facilitate outward expansion of each arcuate post 120a-120d. FIG. 1C shows a state in which the first engaging piece 100 and the second engaging piece 200 are fitted together. The wall portion 130 penetrates the parallel hole 211 of the girder portion 210 and protrudes to the lower surface (upper side in FIG. 1C) of the girder portion 210 . On the other hand, in FIG. 1D, the bulging portion 221 climbs over the fitting portions 121a-121d, and its tip 222 is visible on the lower surface side of the base portion 110. As shown in FIG. In the process of inserting the projecting portion 220 into the surroundings of the arc columns 120a to 120d, the arc columns 120a to 120d are curved outward while the swelling portion 221 is overcoming the fitting portions 121a to 121d. Each arc post 120a-120d restores its original shape after the portion 221 overcomes the mating portions 121a-121d. After the enlarged portion 221 has passed over the fitting portions 121a-121d, the neck portion 223 is surrounded by the fitting portions 121a-121d, and the fitting of the first engaging piece 100 and the second engaging piece 200 is completed. do.

FIG. 2 shows how the receiving material 20 is attached to the conveying container 10 by the fastener 1. As shown in FIG. In FIG. 2A, the receiving material 20 is made of, for example, elastic material such as foamed resin or elastomer, cardboard, or other material. The receiving member 20 is manufactured by cutting a plate material of such a raw material into strips by one-time press cutting. Therefore, the cut out receiving material 20 has a pair of flat and mutually parallel surfaces 21 (one of the surfaces 21 is the back side in the drawing) where the surface of the original plate material was, and the surrounding side surfaces are pressed. It is formed into a shape punched out by the die-cutting blade. The fitting portion 24 is a gap penetrating between the pair of surfaces 21 similarly cut by the punching blade of the press, and is provided for attaching the second engaging piece 200 . The fitting portion 24 has a horizontal gap portion 24a having a shape corresponding to the beam portion 210 when projected from the direction S in which the pair of parallel holes 211 of the second engaging piece 200 overlap each other, and a horizontal gap portion 24a having a shape corresponding to the beam portion 210 when projected from the direction S. and a vertical gap portion 24b having a shape corresponding to that of the cylindrical portion 120. As shown in FIG. The fitting portion 24 of this embodiment has a shape in which the projected shape of the girder portion 210 is lowered toward both ends. This is to improve the engagement of the beam portion 210 against the force that pulls down the second engaging piece 200 downward in the drawing. The product contact surface 22 (upper peripheral side surface in the drawing) has a shape necessary for protecting the packaged product. On the other hand, the fixing surface 23 (lower peripheral side surface in the figure) facing the product contact surface 22 is mostly a flat surface, but the vertical gap 24b of the fitting portion 24 reaches the fixing surface 23. I am dividing this.

When the girder portion 210 of the second engaging piece 200 is inserted into the horizontal gap portion 24a, the projection portion 220 is positioned in the vertical gap portion 24b. The space W1 between the pair of parallel holes 211 corresponds to the thickness of the support material 20 (thickness of the original elastic material plate, distance between the pair of surfaces 21). A pair of parallel holes 211 are set so as to appear on the outside of the pair of surfaces 21, respectively. A plurality of fitting portions 24 are provided at appropriate intervals with respect to one receiving member 20 .

In FIG. 2B, the transport container 10 is formed by vacuum forming. In vacuum forming, a plastic sheet is softened by heat, placed on a mold, air is sucked in, and adhered to the mold. In this case, the cutting die blade (not shown) has a mounting hole 12 into which the pair of wall portions 130 are inserted, and a central hole 11 into which the tubular portion 120 of the first engaging piece 100 is inserted. is provided with a blade for perforating the A large number of blade portions are provided according to the number of fitting portions 24 on the side of the receiving member 20 with the central hole 11 and the pair of mounting holes 12 as one set. Therefore, not only is the conveying container 10 cut out from the plastic sheet but also the central hole 11 and the mounting hole 12 are formed at once by one press cutting by the cutting die blade.

The first engagement piece 100 is attached from the front side of the transport container 10 (downward and not visible in FIG. 2B). The cylindrical portion 120 of the first engaging piece 100 is inserted into the central hole 11 and the pair of wall portions 130 are inserted into the mounting holes 12 to set the conveying container 10 . Then, the wall portion 130 is penetrated from the girder portion 210 . The base 110 covers one central hole 11 and a pair of walls 130 . The protrusion 220 is locked inside the cylindrical portion 120 by the swelling portion 221 getting over the fitting portions 121a to 121d. Thus, the receiving member 20 is attached to the transport container 10 by the fastener 1 .

The fixation structure according to this embodiment is further illustrated in FIG. 2C. First, the enlarged portion of the protrusion is caught by the fitting portion of the tubular portion, and the second engaging piece cannot be pulled upward in the drawing. The pair of wall portions 130 penetrate through the girder portion 210 to prevent widening between the pair of wall portions 130 . Also, the first engaging piece 100 and the second engaging piece 200 swing and rotate around the central hole 11 by passing the pair of wall portions 130 through the pair of mounting holes 12 provided in the transport container 10 . is prevented. The pair of wall portions 130 sandwich the receiving material 20 in the thickness direction, and the girder portion 210 is accommodated in the horizontal gap 24a of the receiving material 20, thereby preventing the transporting container 10 and the receiving material 20 from being separated. is doing. Due to such a fixed structure, the receiving material is less likely to come off from the conveying container, which is a vacuum-formed product without stiffness.

In addition, since the wall portion 130 supports the pair of surfaces 21 of the receiving material 20 from both sides, and the base portion 110 and the beam portion 210 sandwich the conveying container 10 and the receiving material 20 from above and below, for example, as shown in FIG. Even if a force F2 is applied to the material in the lateral direction of the drawing, the wall portion 130 that receives the force does not stand alone, but because the pair of wall portions 130 are connected by the girder portion 210, the girder portion 210 By transmitting the force to the other wall portion 130 via the base portion 110 and going around the base portion 110, the lateral force F2 can be resisted by the entirety of the first engaging piece 100 and the second engaging piece 200.

FIG. 3 shows a state seen from the front side of the transport container 10 when the first engaging piece 100 and the second engaging piece 200 are fitted to each other. 3A shows the state before mating, and FIG. 3B shows the state after mating. When the first engaging piece 100 and the second engaging piece 200 are fitted together, the tip 222 of the enlarged portion 221 emerges from the through hole 111 of the first engaging piece 100 with a predetermined height. If the tip 222 cannot be observed as shown in FIG. 3C, it means that the first engagement piece 100 and the second engagement piece 200 are not properly fitted. In this way, it is possible to confirm the fitting of the first engagement piece 100 and the second engagement piece 200 from the front side of the transport container 10 . Further, by fitting the first engaging piece 100 and the second engaging piece 200 together, the through hole 111 is closed and foreign matter is prevented from entering the transport container 10 .

On the other hand, when separating the fitted fastener 1, as shown in FIG. 3D, the front end 222 of the enlarged portion 221 is pushed with a jig JG such as a ballpoint pen from the front side of the transport container 10. FIG. Then, the first engaging piece 100 and the second engaging piece 200 are separated. It is easy to replace the deteriorated receiving material 20 and to separate the transportation container 10 when discarding it, which is friendly to the environment.

FIG. 4 shows the central hole 11 and mounting holes 12 provided in the transport container 10 . The central hole 11 and mounting hole 12 in FIG. 4A are shown in the above embodiment, the central hole 11 being a circular hole and the mounting hole 12 being a rectangular hole. They do not necessarily have the same cross-sectional shape as the cylindrical portion 120 and the wall portion 130 as long as the cylindrical portion 120 and the wall portion 130 can pass through them. However, if the dimensions are significantly different, it will not be stably fixed to the transport container 10 .

4B and 4C show other examples of the central hole 11 and mounting hole 12. FIG. In FIGS. 4B and 4C, solid lines 11a, 11b, and 12a depicting the central hole 11 and the mounting hole 12 indicate locations cut by the "blades" of the cutting die after vacuum forming, and dotted lines 11c and 12b indicate the cutting die. It shows the part where the crease is given to the blade by the "rule". In FIG. 4B, a cross-shaped "blade" is used to form the central hole 11, and in FIG. 4C, a star-shaped "blade" is used to perforate a cross-shaped slit or a star-shaped slit. The cross-shaped slit or the star-shaped slit has a length corresponding to the cross-sectional shape of the tubular portion 120 . Then, circular or polygonal creases are formed around the periphery of the slit. On the other hand, the mounting hole 12 is formed in a rectangular shape by a U-shaped "blade" and a linear "rule" forming one open side of the U-shaped. A “rule” is one side of the rectangular hole on the side away from the central hole 11 . When the tubular portion 120 and the wall portion 130 are inserted into the central hole 11 and the mounting hole 12, respectively, the uncut portions are turned up. Due to the repulsive force of the folding lines, the force with which the cylindrical portion 120 surrounds and holds the protrusion 220 is strengthened. In addition, the force that prevents the wall portion 130 from collapsing is strengthened. It should be noted that providing a "ruled line" on the cutting die blade makes it easier to insert the cylindrical portion 120, but providing a "ruled line" on the cutting die blade is not essential.

FIG. 5 shows another variant of the invention.
In the above embodiment, the first engaging piece 100 and the second engaging piece 200 are joined to each other by locking the projecting portion 220 with the cylindrical portion 120 . In the example shown in FIGS. 5A and 5B, a mechanism for joining the first engaging piece 100 and the second engaging piece 200 is provided on the side of the wall portion 130 and the beam portion 210, and the cylindrical portion 120 and the projection portion 220 are omitted. It is Hooks 212 are provided in the parallel holes 211 provided in the girder 210, and the wall 130 is provided with recesses 132 (which may be holes or grooves) in which the hooks 212 are caught. According to this example, the vertical gap 24b on the side of the receiving material 20 is also not necessary. In addition, as means for joining the first engaging piece 100 and the second engaging piece 200, a projecting portion 220 may be provided on the first engaging piece 100 side and a tubular portion 120 may be provided on the second engaging piece 200 side. good.

Also, in the embodiment of FIG. 5C, ribs 14 are provided on the outside of the wall portion 130 . By providing the ribs 133, the wall portion 130 is reinforced, and the risk of the wall portion 130 falling outward and failing to be inserted when the wall portion 130 is inserted into the parallel hole 211 of the second engaging piece 200 is reduced. be.

It should be noted that the present invention is not limited to the above-described embodiment, and the fastener 1 can be used for, for example, a transport container such as corrugated cardboard other than the transport container 10 made of a vacuum-formed plastic sheet. good too. Further, the fastener 1 is desirably made of a lightweight material that does not increase the weight, such as pulp molded products, wood, etc., in addition to the injection-molded plastic in the embodiment.

1 Fastener 10 Transport Container 11 Central Hole 12 Mounting Hole 14 Rib 20 Receiving Material 21 Surface 22 Product Abutting Surface 23 Fixing Surface 24 Fitting Portion 24a Horizontal Gap 24b Vertical Gap 30 Double-Sided Tape 100 First Engagement Piece 110 Base 111 Through hole 112 Cavity 120 Cylindrical portion 120a-120d Arc column 121a-121d Fitting portion 122a-122d Tapered surface 123a-123d Surface 130 Wall portion 131 Surface 132 Recess 133 Rib 200 Second engaging piece 210 Beam portion 211 Parallel hole 212 Hook 220 Projection 221 Enlarged portion 222 Tip 223 Neck 224 Surface

Claims (3)

A product contact surface, a pair of flat and mutually parallel surfaces in contact with both sides of the product contact surface, a gap cut through between the pair of surfaces, and a gap facing the product contact surface. a strip-shaped receiving material having a fixing surface;
a conveying container having a pair of mounting holes drilled at intervals corresponding to the distance between the pair of surfaces;
a first engaging piece having a base and a pair of wall portions protruding from the base;
a second engagement piece provided with a pair of parallel holes in the girder,
The second engaging piece is inserted into the gap of the receiving member, and the pair of parallel holes are set so as to appear outside the pair of surfaces, respectively, and the pair of wall portions are arranged to connect the pair of wall portions. are inserted into the mounting hole and the pair of parallel holes in this order, and the first engaging piece and the second engaging piece are joined together;
The gap of the receiving material is provided with a vertical gap portion cut through between the pair of surfaces reaching the fixing surface,
A central hole is provided between the pair of mounting holes of the transport container,
The first engaging piece is provided with a cylindrical portion that protrudes from the base portion, is composed of a plurality of circular arc columns, and has a fitting portion inside the circular arc in the middle of the length,
The second engaging piece protrudes from the girder and has a neck on the girder side and an enlarged portion at the tip. is provided with a protrusion that locks
The protruding portion is inserted into the vertical gap of the receiving member, the cylindrical portion is inserted into the central hole and the vertical gap in this order, and the cylindrical portion and the protruding portion are locked to each other. Fixed structure characterized.
A product contact surface, a pair of flat and mutually parallel surfaces in contact with both sides of the product contact surface, a gap cut through between the pair of surfaces, and a gap facing the product contact surface. a strip-shaped receiving material having a fixing surface;
a conveying container having a pair of mounting holes drilled at intervals corresponding to the distance between the pair of surfaces;
a first engaging piece having a base and a pair of wall portions protruding from the base;
a second engagement piece provided with a pair of parallel holes in the girder,
The second engaging piece is inserted into the gap of the receiving member, and the pair of parallel holes are set so as to appear outside the pair of surfaces, respectively, and the pair of wall portions are arranged to connect the pair of wall portions. are inserted into the mounting hole and the pair of parallel holes in this order, and the first engaging piece and the second engaging piece are joined together;
The fixing structure is characterized in that the pair of wall portions are provided with recesses, and the parallel holes of the second engaging pieces are provided with hooks that are caught in the recesses .
The fixing structure according to claim 1, wherein the central hole is a cross-shaped or star-shaped slit .

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