JPS6229313B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION One well-known connection structure for securing a pair of plates in overlapping and surface-to-surface contact is shown in expired US Pat. No. 2,786,572; In this structure, a locking piece stamped from one plate is pushed into a locking hole formed by a holding piece stamped from the other plate. The connection structure according to the above-mentioned patent can be used, for example, in wrap-around product containers (carrying containers) to form a firm and reliable connection, in which the container material wraps around the product group against the tension of the material. The packaging is tightened to maintain the firmness of the packaging. Some wrap-around product containers using the connecting structure of the above-mentioned patents can function as containers for large primary packaging; is not always suitable, and in some cases large primary packages have to be sent back to the packer due to environmental considerations or other reasons that have recently been emphasized. Due to the desire for packaging integrity, plate connections used in wrap-around containers (particularly for large bottles or cans) are designed to withstand significant tension in the container material or connections weakened by excessive moisture. , is required to be sufficiently strong.

In the present invention, the plate connection structure shown in the aforementioned US Pat. No. 2,786,572 is improved to significantly enhance package integrity. Said reinforcement is effected by providing retaining means, such as grooves, in the locking piece, said means receiving the free end of the retaining piece when the locking piece is pushed into the locking hole formed by the retaining piece; Therefore, the locking piece and the holding piece are held at an angle to each other. Furthermore, a fixing piece is provided that projects from the end of the locking hole, said fixing piece being inserted into the fixing hole made in the locking piece when the locking piece is pushed into the locking hole as usual.

This will be explained below with reference to the attached drawings.

In FIG. 6, a pair of gripping holes 2 and 3 are made in the main plate part 1. The main plate part 1 normally constitutes the ceiling plate part of a container (portable container), but in FIGS. 1, 3 and 4, the container is shown upside down.

Side wall plate parts 4 and 5 are bendably connected to the main plate part 1 along interrupted fold lines 6 and 7, and product receiving holes 8,
9, 10, 11 are made and similar holes 12, 13, 14, 15 are made along the fold line 7, these holes 8-15 are well known for the edges of the packaged product such as can C. accept it as such.

Layered plate portions 16 and 17 are bendably connected to ends 18 and 19 of plate portions 4 and 5, respectively;
Along fold line 18 product receiving holes 20-23 are made, and along fold line 19 similar holes 24-27 are made.

In order to separate products such as C ₁ in one row of products from products such as C ₂ in the other row of products, the stacking plate part 1
An intermediate keel plate 28 is bendably connected to the plate 7 along a fold line 29, and a slit 30 is formed along the fold line 29 to effectively increase the width of the plate 17 and improve locking reliability. , 31, 32 are created.

A number of tensioning holes 33-36 are made in the stacking plate 16 and similar holes in the stacking plate 17 for tensioning the material around the product group before joining the plates 16 and 17. Tension holes 37-40 are made. As is well known, tensioning parts (of the packaging machine) are inserted into the tensioning holes 33 to 36, and these parts are inserted into the tensioning holes 37 to 40.
It moves inward in a direction opposite to the direction of movement of similar parts inside, tensioning the material around product C. Also, as is well known, cutout areas 41-44 are made along the edges of the plate 16 to prevent interference with the above-mentioned components inserted into the tensioning holes 37-40;
A similar cut-out area 45 in the end of the keel plate portion 28 to prevent interference with the above-mentioned parts inserted into the keel plate 28.
~48 are made.

In order to connect the stacked plate parts 16 and 17 so that they overlap and make surface contact, a large number of lock pieces 49 to 53 are punched out from the plate part 16, and the lock pieces 49 to 5
3 are bendably connected to the plate portion 16 along fold lines 54-58 at their bases. As shown in FIG. 6, the fold lines 54 to 58 are, for example, 55
The structure is interrupted, as shown as a and 55b.

The lock pieces 49 to 53 cooperate with the lock holes formed by the holding pieces 59 to 63 punched out from the stacked plate part 17, and the holding pieces 59 to 63 cooperate with the lock holes formed by the holding pieces 59 to 63 punched out from the stacked plate part 17.
It is bendably connected to the plate part 17 along lines 4 to 68.

The structure described above, except for the interrupted fold lines such as 55a and 55b, is substantially in accordance with the prior art as represented by the aforementioned US Pat. No. 2,786,572.

In the present invention, fixing holes 69 to 73 are made in the locking pieces 49 to 53, and fixing pieces 74 to 78 forming extensions (projections) of the plate portion 17 are provided. , projecting into these holes from the ends of the locking holes formed by the retaining pieces 59-63, and furthermore, "retaining means" in the form of grooves 79-83 are made in the locking pieces 49-53.

After the blank has been properly tensioned around the group of products C, the locking pieces 49-53 are engaged by the locking plungers shown as P in FIGS. 3 and 4 and formed by the retaining pieces 59-63. It is pushed into the lock hole. By this operation, the holding pieces 59 to 63 are bent at their end fold lines 64 to 68,
The free ends of the retaining pieces 59-63 engage with the respective locking pieces, so that the holding pieces and the locking pieces
As shown in FIGS. 4 and 5, they are kept in a "mutually angularly supported" state. Groove 7
The engagement of the free ends of the retaining pieces 59-63 into the retaining pieces 9-83 helps to keep the locking pieces and the retaining pieces mutually supported as described above. Instead of grooves such as grooves 79-83, suitable holes or stamped projections may be provided, but these are all encompassed within the meaning of the above-mentioned "retaining means".

As mentioned above, the locking operation is performed by pushing the locking piece into the locking hole, and at the same time, the fixing piece 7
4-78 are inserted into the fixing holes 69-73 and serve to keep the container locked. The fixing pieces and fixing holes serve to maintain locking reliability even if the fold lines 54-58 at the base of the locking pieces 49-53 are displaced along each locking piece. This deviation of the fold lines 54-58 of the locking piece from the normal position at the base of the locking piece to a position a little further away is due to the fact that the container material, such as cardboard, is weakened (or softened) by high humidity. Occasionally occurs due to

The fixing holes 69-73 are connected to the interrupted fold lines 54-
Although preferably located approximately centrally between the ends of 58, these holes may be located at other locations along the above fold line and, if desired, more than one (69
Fixing holes (such as 73) may also be provided. Of course, in this case fixing pieces (such as 74 to 78) are provided which match these fixing holes both in position and number.

As is clear from the foregoing, the fixing pieces such as 74-78 and the fixing holes such as 69-73 cooperate with each other even when the atmospheric conditions are high humidity or the fold lines 54-58 It serves to ensure lock reliability even in the event of other conditions that tend to shift the position. Furthermore, the fixing piece and the fixing hole enhance the supporting action of the retaining piece by limiting the relative movement between plates 16 and 17, thus contributing to the reliability of the positive lock. The retaining means 79-83 are such that the free ends of the retaining pieces engage in the grooves 79-83, in particular when the tension in the container is reduced, such as by removing one (or more) products from the container. This prevents the holding piece from slipping along the locking piece, and thus serves to keep the container (the lock part) in a locked state.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the can container according to the present invention when placed upside down, and FIG. 2 is a locking piece, holding piece, and holding means in a locked state as seen from the left side of FIG. 1. , an enlarged perspective view of the fixing piece and the fixing hole, FIG. 3 is a perspective view of the two plate parts to be connected, before the engagement and connection operation starts, and FIG. 4 is the two plate parts in a completely connected state. Figure 5 is a sectional view taken along line 5-5 in Figure 2, Figure 6 is a perspective view of Figure 1.
FIG. 3 is a plan view of a material for making the container shown in the figure. 1... Main plate part, 4, 5... Side wall plate part, 16, 1
7...Stacked plate part, 49-53...Lock piece, 59
~63...Holding piece, 69-73...Fixing hole, 74
~78...Fixing piece, 79-83...Holding means in the form of a groove.

Claims (1)

[Claims] 1. In a structure for connecting a pair of plate parts in an overlapping state, the plate parts are punched out from one of the two plate parts and bendable to the one side along an interrupted fold line. a locking piece connected to the plate, a holding piece punched out from the other of the plate parts, bendably connected to the other plate along the fold line, and forming a lock hole in the other plate; a fixing piece forming a protrusion of said other plate along a lateral edge, and a fixing made in said locking piece for receiving said locking piece when said locking piece is pushed into said locking hole; A structure having holes. 2. The structure according to claim 1, wherein the fixing piece is located approximately centrally between the lateral ends of the locking hole. 3. The structure according to claim 1, wherein the fixing hole is located approximately at the center between the ends of the interrupted fold line. 4. The structure according to claim 1, wherein the fixing piece is stamped from the holding piece. 5. The structure of claim 1, wherein the fixing hole is located at an interrupted portion of the interrupted fold line. 6. The interrupted fold line is located near the lateral end of the lock hole.
Structure described in section. 7. The structure according to claim 1, wherein the lateral end of the lock hole from which the fixing piece protrudes is far from the fold line. 8 Forming a holding means on the locking piece to receive the free end of the holding piece far from the fold line, so that the locking piece and the holding piece are maintained in a mutually supported form at an angle. The structure according to claim 1, constructed as follows.