JP3023954B2 - Molding method for synthetic resin pallets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a synthetic resin pallet which can be suitably used for carrying various articles.

[0002]

2. Description of the Related Art A cylindrical girder at a corner, which has a front part and a back part, where the front part and the back part connect corners of the front part and the back part, and an intermediate part around the front part and the back part. The fork insertion hole is formed in the shape of a well between the tubular girders, and is connected by the central tubular girder connecting the middle part of the middle part and the central part of the front part and the back part of the back part. In addition, a synthetic resin pallet having a large through-hole formed below a portion where the fork insertion hole intersects on the back surface is known. However, in the conventional synthetic resin pallet, since the corner protruding toward the large through-hole of the cylindrical girder is almost a right angle, articles wrapped in a paper bag are placed on the synthetic resin pallet and stacked in multiple stages. In this case, the corner protruding at a right angle toward the large through-hole of the cylindrical girder of the synthetic resin pallet located at the upper stage comes into contact with the paper bag of the article located at the lower stage, so that the paper bag is easily broken. .

[0003]

SUMMARY OF THE INVENTION The present invention provides a method of forming a synthetic resin pallet in which paper bags are not easily broken when articles wrapped in paper bags are placed on a synthetic resin pallet and stacked in multiple stages.

[0004]

SUMMARY OF THE INVENTION The present invention has a front surface portion and a back surface portion, and has a cylindrical girder at the corner connecting the corner portions of the front surface portion and the back surface portion, and an intermediate portion between the periphery of the front surface portion and the back surface portion. It has an intermediate tubular girder connecting the parts and a square tubular girder at the center connecting the central parts of the front part and the back part, and a fork insertion hole is formed between the tubular girders. A large through hole is formed below the portion where the fork insertion hole intersects on the back surface, and the corner of the tubular girder at the center projects into the through hole on the back surface where the fork insertion hole intersects, and In molding a synthetic resin pallet in which a plate-shaped portion is formed on the bottom surface of each corner of the square tubular girder, a synthetic resin is supplied into a mold and the pallet is integrally molded. The present invention relates to a method of forming a synthetic resin pallet to be formed.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an example of a synthetic resin pallet according to the present invention, FIG. 2 is a bottom view of the synthetic resin pallet shown in FIG. 1, and FIG. 3 is a front view of the synthetic resin pallet shown in FIG. 4, FIG. 4 is a sectional view of the synthetic resin pallet shown in FIG. 1, FIGS. 5 and 6 are partial perspective views of the synthetic resin pallet shown in FIG. 1, and FIGS. 7 and 8 show the synthetic resin pallet shown in FIG. It is sectional drawing which shows the state which is shape | molding.

The pallet made of synthetic resin is integrally injection-molded with a synthetic resin such as polyethylene or polypropylene, and has a front part 1 and a back part 2, and the front part 1 and the back part 2 are combined with the front part 1 and the back part 2. The cylindrical girder 3 at the corner connecting the corners of the two, the cylindrical girder 4 at the middle connecting the middle part around the front part 1 and the back part 2 and the center part between the front part 1 and the back part 2 Are connected by a square tubular girder 5 at the center, and a fork insertion hole 6 is formed between the tubular girder 3, 4 and 5 in the shape of a well.

A partition plate 7 whose upper end reaches the front surface portion 1 and whose lower end reaches the back surface portion 2 is provided diagonally across the inside of the square tubular girder 5 at the center and is reinforced. I have.

A beam 8 is formed on the surface 1 between the intermediate tubular girder 4 and the partition plate 7.
The cross section between the rectangular tubular girder 5 at the center and the square tubular girder 5 at the center is a triangle shape, and the cross section at the inside of the square tubular girder 5 at the center is a T shape. A bar 9 having a cross section as shown in FIG. 4 is formed on the back surface portion 2 so as not to vertically overlap with the bar 8 between the tubular portion 4 at the middle portion and the rectangular tubular portion 5 at the center portion. With the cross 9
The crosspiece 10 is formed symmetrically with respect to the left and right, and the crosspiece 10 has a horizontal plate-shaped portion 11 and an inverted U-shaped portion 12 rising from an end of the horizontal plate-shaped portion 11. A plurality of inclined ribs 13 are provided on the portion 11.

[0010] Inside the square tubular girder 5 at the center, a U-shaped bar 14 having a through hole crossing in a cross shape is formed on the back surface 2.
Are formed, and a plate-like portion 15 having a through hole is formed inside the lower end of the corner portion 33 of the tubular girder 5.

On the front surface portion 1 and the back surface portion 2, a connecting portion for connecting the cylindrical girder 3 at the corner portion and the cylindrical girder 4 at the middle portion is formed. The connecting portion on the surface is formed by bars 16 crossing vertically and horizontally. An upper plate-like portion 17 located at a position higher than the lower ends of the tubular girders 3, 4, and 5 in the center of the connecting portion on the back surface portion
Is formed, and a lower plate-like portion 18 whose lower surface is flush with the lower end of the tubular girder is formed along both side edges thereof, and an edge of the lower plate-like portion 18 is formed on the lower plate-like portion 18. A plurality of inclined ribs 19 descending toward the portion are formed.

Inside the cylindrical girder at the corner, a partition plate 20 whose upper end reaches the front surface portion 1 and whose lower end reaches the back surface portion 2 is formed obliquely. Further, inside the cylindrical girder 3 at the corner, a plate-shaped portion 21 and a cross-section bar 22 having a cross section are formed on the front surface portion 1, and a cross section is formed on the back surface portion 2.
A plate-like portion 24 having a through-hole inside is formed at the lower end of the crosspiece 23 and the corner 34 of the tubular girder 3.

In the middle of the tubular girder 4 in the middle, a plate-like portion 25, a cross-section bar 26 and a plate-like portion 27 having a cross section
Are formed, and a cross-section 28 having a cross section is formed on the back surface portion 2.

Above the portion where the fork insertion holes 6 intersect, a bar 29 is formed on the surface 1 so as to cross vertically and horizontally, and a bar 30 having a cross section is formed around the bar 29. I have. Below the portion where the fork insertion holes 6 intersect, a large through hole is provided in the back surface portion 2.

A notch 32 is formed at a corner 31 of the tubular girder 4 in the middle.
Are formed. The synthetic resin pallet shown in FIGS. 1 to 6 has some of the corners 33, 34 among the corners 31, 33, 34 protruding toward the large through holes of the tubular girders 3, 4, 5.
Only the plate-like portions 15 and 24 are formed, and the notch 32 is formed in the remaining corner 31. However, if necessary, all the corners 31, 33, and 34 protruding toward the large through-holes are formed with plates. A shape may be formed. Due to the formation of the plate-shaped portion, when the articles wrapped in the paper bag are placed on a synthetic resin pallet and stacked in multiple stages, the paper bag is not easily broken.

Inside the tubular girder 3 at the corner, the tubular girder 4 at the middle and the tubular girder 5 at the center, the tubular girders 3, 4,
5, slightly projecting from the inner surface of
Reinforcing pieces 35 are formed to connect the side edges 22 and 26 and the side edges of the bars 14, 23 and 28 of the back surface 2.

The synthetic resin pallet shown in FIGS. 1 to 6 has mold blocks 36 and 37 which enter from the side as shown in FIGS. 7 and 8, and a mold block 38 which comes into contact with the front side of the synthetic resin pallet. And the mold block 39 contacting the back side of the synthetic resin pallet, so that the injection molding can be performed integrally, thereby improving the productivity.

[0018]

According to the present invention, an article wrapped in a paper bag is formed on a synthetic resin pallet by forming a plate-like portion inside a lower end of a corner protruding toward a large through hole of a cylindrical girder. The productivity is improved by integrally molding a pallet made of a synthetic resin, which is hard to tear when the paper bags are stacked on the pallet, in a mold.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a synthetic resin pallet according to the present invention.

FIG. 2 is a bottom view of the synthetic resin pallet shown in FIG.

FIG. 3 is a front view of the synthetic resin pallet shown in FIG.

4 is a sectional view of the synthetic resin pallet shown in FIG.

5 is a partial perspective view of the synthetic resin pallet shown in FIG.

FIG. 6 is a partial perspective view of the synthetic resin pallet shown in FIG.

7 is a cross-sectional view of the mold showing a state where the synthetic resin pallet shown in FIG. 1 is integrally molded using the mold.

FIG. 8 is a partial state diagram showing a relationship between respective mold blocks in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front part 2 Back part 3 Cylindrical girder of a corner part 4 Cylindrical girder of a middle part 5 Square cylindrical girder of a center part 6 Fork insertion hole 7 Partition plate 33, 34 Corner 15, 24 Plate 36 , 37,38,39 Mold block

Claims (2)

(57) [Claims] 1. A front part and a back part having a front part and a back part.
Cylindrical girder, front and back sides connecting corners
Girder and table of middle part connecting middle parts around
A square tube at the center that connects the center of the surface and the back
With a fork insertion hole in the shape of a well between cylindrical girder
Formed on the back, where the fork insertion hole intersects
A large through hole is formed below, and the corner of the tubular girder in the center is
The fork insertion hole protrudes through the through hole on the
A partition shape that reaches from the front to the back inside the square cylindrical part at the center
A plate body is provided obliquely intersecting, and each of the rectangular tubular girders
Integrally molded synthetic resin with a plate-shaped part formed at the bottom of the corner
Pallets. 2. A cylindrical girder having a front surface portion and a back surface portion and connecting a corner portion between the front surface portion and the back surface portion, and an intermediate portion connecting an intermediate portion around the front surface portion and the back surface portion. It has a tubular girder and a square tubular girder at the center connecting the central part of the front part and the back part, and a fork insertion hole is formed in a cross between the tubular girders, and the back part is large through hole is formed in the lower portion of the fork insertion holes intersect, protrudes through the hole of the bottom corner portion of the tubular girder of the central portion intersects the fork insertion holes, the middle
A partition shape that reaches from the front to the back inside the square cylindrical part at the center
In molding a synthetic resin pallet in which a plate body is provided obliquely intersecting and a plate-shaped portion is formed on the bottom surface of each corner of the rectangular tubular girder, synthetic resin is supplied into the mold. And
A method of forming a synthetic resin pallet, wherein the pallet is integrally formed.