JP3255402B2 - Plastic 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 synthetic resin pallet to which a non-slip material is attached, and more particularly to a synthetic resin pallet to which a grommet type non-slip material is attached.

[0002]

2. Description of the Related Art Pallets used for storing and transporting luggage are compared with metal pallets and wooden pallets.
BACKGROUND ART Synthetic resin pallets are widely used because of their excellent moldability and corrosion resistance, and their advantages such as reduction in weight. However, the synthetic resin pallet has a drawback that the coefficient of friction is small and slippery due to the inherent properties of the synthetic resin.

Therefore, in order to prevent slippage, a tape for preventing slippage has been applied to the upper surface of the pallet, or a through hole has been provided in an appropriate place on the deck board of the pallet, and a rubber grommet-type slide has been formed in the through hole. Methods such as inserting a stopper are used. 4 and 5 are an explanatory perspective view and an enlarged partial cross-sectional view of a pallet to which a grommet-type non-slip member is attached. As shown in the figure, grommet type anti-slip material 1
Are flange-shaped locking portions 1 at both ends of the cylindrical body portion 1a.
b, 1c are integrally formed and attached to a mounting hole 4 penetrating the upper deck board 3 of the pallet 2, and the end faces of the flange-like locking portions 1b, 1c of the anti-slip material 1 are provided on the inner and outer surfaces of the deck board. Exposed and slightly projecting. The grommet type anti-slip material 1 prevents the loaded luggage from slipping on the upper surface of the deck board, and also prevents the lower surface of the deck board facing the fork insertion hole from slipping with the fork during transportation by a forklift.

[0004]

Generally, it is preferable that the grommet type anti-slip material 1 can be easily inserted since it is attached to the pallet in a post-process after the pallet is formed.
However, being easy to insert is easy to come off,
In addition, there is a problem that durability is inferior to pallets. That is, as shown in FIG. 5, when the load is placed, the grommet type anti-slip material 1 is pushed down by the load by the load, and the end face of the flange-shaped locking portion 1c facing the fork insertion hole further projects. Will do. Therefore, when the forklift is transported, the tip of the fork 5 hits the flange-shaped locking portion 1c, and if the fork 5 is damaged or severe, the flange-shaped locking portion 1c is rolled up and the grommet-type non-slip material itself is pulled out. There is. Flange-shaped locking part 1c to facilitate grommet insertion
When the thickness is reduced, there is a problem that the fork is easily damaged or pulled out.

[0005] In order to prevent the grommet type anti-slip material from being damaged or pulled out by a fork, the flange-shaped locking portion 1c is required.
However, if the thickness of the flange-shaped engaging portion 1c is increased, it becomes difficult to insert the flange-shaped engaging portion 1c when mounting on a pallet. According to the results of various tests conducted by the inventors so far, the flange-shaped locking portion 1c
When the thickness exceeds about 5 mm, breakage and pull-out by a fork are unlikely to occur, but insertion when attaching to a pallet is difficult. Conversely, the flange-shaped locking portion 1
When the thickness of c is about 5 mm or less, although insertion at the time of mounting on a pallet is easy, breakage or pull-out by a fork is apt to occur.

Further, in order to obtain a sufficient anti-slip effect, it is preferable to increase the amount of protrusion of the flange-shaped locking portion 1c from the lower surface of the deck board. However, the larger the amount of protrusion, the easier it is for the tip of the fork to hit. The grommet type anti-slip material 1 is likely to be damaged or pulled out.
Conversely, if the protrusion amount is reduced, it becomes difficult to contact the fork when the fork is inserted, and the function as the anti-slip material cannot be performed. In addition, in order to prevent damage due to the fork, it is necessary to make the material of the grommet type anti-slip material of high quality.

Further, in recent years, there has been an increasing demand for recycling of synthetic resin pallets, and crushed pallets obtained by crushing pallets have been reused. Therefore, in order to crush and reuse the pallet, it is necessary to remove the non-slip material of a different material. In order to remove the non-slip material, it is preferable that the pallet be easily pulled out without cutting. However, there is a problem in that if the fork is easily pulled out, it is easy to be pulled out by the collision of the fork as described above.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has an object to have a sufficient anti-slip effect, to be less likely to be damaged or pulled out, and to be easily pulled out when trying to remove it. The present invention provides a synthetic resin pallet that can be used.

[0009]

The present invention has the following configuration to achieve the above object. That is, a pallet according to the present invention is a pallet in which a grommet-type non-slip material is attached to an appropriate position on a deck board, wherein the grommet-type non-slip material integrally forms flange-shaped locking portions at both ends of a cylindrical body. The thickness of the flange-shaped locking portion of the flange-shaped locking portion facing the fork insertion hole is 1
A protrusion protruding from the inner surface of the deck board on the side facing the fork insertion hole, of the mounting hole forming portion forming the mounting hole of the grommet-type anti-slip material; The protruding dimension of the grommet type non-slip material is 0.5 to
It is characterized in that it is formed so as to protrude by 2.5 mm and that a stepped surface formed by an inclined surface or a curved surface continuous with the inner surface of the deck board is formed on the lower surface of the protruding portion. The step difference may be formed on the outer peripheral edge of the lower surface of the projecting portion, or may be formed on the entire lower surface of the projecting portion. Further, the protrusion may be provided on the entrance side of the fork insertion hole, and a lower surface of the protrusion may be formed with an inclined surface or a curved surface continuous with an inner surface of the deck board.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment will be described below in detail. FIG. 1 is a partial front view for explaining a synthetic resin pallet formed according to the present invention, and FIG. 2 is an enlarged sectional view of a mounting hole forming portion for mounting a grommet type anti-slip material. The grommet-type non-slip material 13 according to the present invention includes:
Flange-shaped locking portions are integrally formed at both ends of the cylindrical body portion, and at least one of the flange-shaped locking portions facing the fork insertion hole (hereinafter referred to as a lower flange-shaped locking portion). Stop portion) is formed in a thickness of 1 to 6 mm. The present invention is directed to a non-slip material having a lower flange-shaped locking portion having a thickness of 1 to 6 mm, which is not only easily broken or pulled out by the contact of a fork, but also easily removable at the time of recycling. .

In order to mount the grommet type anti-slip material 13, a mounting hole forming portion 11 having an anti-slip material mounting hole 12 is formed at an appropriate position facing the fork insertion hole of the deck board 10, and the anti-slip material is provided. The material mounting hole 12 is
The upper portion is slightly enlarged in diameter to facilitate insertion of the grommet type anti-slip material 13, and the upper surface side flange-shaped locking portion (hereinafter, referred to as “the grommet type anti-slip material 13”) of the deck board is used.
A step portion 14 for locking the upper flange-shaped locking portion).
A step portion 15 for locking the lower flange-shaped locking portion is provided. The shape, size, and the like of the non-slip material mounting hole 12 may be appropriately determined depending on the shape, size, material, and the like of the non-slip material to be mounted.

In order to prevent breakage or pull-out due to collision with the fork, it is preferable that the projecting amount of the lower flange-shaped engaging portion is smaller. As the amount of protrusion of the lower flange-shaped locking portion is reduced, the slip prevention function as a non-slip material is reduced accordingly. Therefore, in the present invention, while the height T ₄ dimensions of the stepped portion 15 substantially the same as conventional, the lower portion of the forming portion 11 of the slip member mounting hole 12 (lower surface of the deck board), the deck board 10 to form a protrusion 16 which protrudes by a dimension T ₂ from the lower surface.

The mounting hole forming portion 11 is formed higher than the deck board 10 by the amount of the protruding portion 16, so that the lower flange-shaped locking portion of the anti-slip member has a protruding dimension of:
Conventionally thing was T ₃ from the lower surface of the deck board 10, a T ₁ is reduced by the height T ₂ of the projecting portion 16. That is, the protruding dimension T ₁ of the lower flange-like locking part, T
A ₁ = _T 3 -T _2. Due to the formation of the protruding portion 16, even if the thickness of the lower flange-shaped locking portion of the anti-slip material is increased, the protruding amount can be reduced and the fork can be prevented from coming off due to a collision, but the anti-slip effect is obtained. Is not reduced.

The protrusion T of the protrusion 16
_2, 0.5 is projecting dimension _{T 1} of the lower flange-like locking part
It is formed to have a height of 2.5 mm, preferably 1.0 to 2.0 mm. Projecting dimension of the lower flange-like engagement portion T ₁
If it is smaller than 0.5 mm, it will not be damaged by the contact with the fork, but sufficient slip prevention cannot be obtained. If it is larger than 2.5 mm, the slip prevention is sufficient, This is because the breakage rate due to the damage increases. The outer peripheral edge of the bottom surface of the projecting portion 16 is formed so as to be gradually shifted to the lower surface of the deck board 10 by a step 17 formed by an inclined surface or a curved surface.
The outer peripheral surface of the step difference 17 can be formed so as to protrude outside the outer peripheral surface of the forming portion 11.

The stepped blur 17 is such that the outer peripheral surface of the projecting portion 16 does not intersect at right angles with the lower surface of the deck board,
It is formed at a continuous boundary so as to make a gradual transition. In this way, the projection 16 is formed so that the lower portion of the attached anti-slip material slightly projects,
By forming the outer peripheral edge of the bottom surface of the protruding portion 16 with the step-indent 17, the tip of the fork escapes obliquely downward, so that the contact of the fork becomes oblique and the grommet is further prevented from being damaged. In addition, since the height of the anti-slip member protruding from the lower surface of the deck board is sufficient, sufficient anti-slip can be obtained by the frictional force of the anti-slip material.

FIG. 3 shows another embodiment of the present invention.
In the above-described embodiment, the bottom surface of the protruding portion 16 has the stepped blur 17 formed by the inclined surface or the curved surface only on the outer peripheral edge. However, in this embodiment, the entire bottom surface of the protruded portion 16 is formed by the stepped blur 17a formed by the inclined surface or the curved surface. It was done. In this way, the entire bottom surface of the projection 16 is
In the case of “a”, it is possible to move more gradually from the top of the bottom surface to the inner surface of the deck board.

In the above embodiment, the mounting hole forming portion 11
A protrusion 16 is provided at a lower portion of the projection 16, and a stepped blur 17 formed by an inclined surface or a curved surface is formed on the entire outer periphery of the bottom surface of the protrusion 16.
Although the projections 17a are formed, it is not always necessary to provide the protrusions and the steps on the entire circumference. The protrusions 16 are provided on the entire lower part of the formation section 11, and the steps 1a and 1b are formed.
7, 17a may be provided only on the inlet side of the fork insertion hole. Further, the protrusion 16 and the steps 17 and 17a may be formed only on the entrance side of the fork insertion hole of the fork.

As in the above embodiment, the mounting hole forming portion 11
Projecting part 16 projecting below the lower surface of the deck board
Since the protrusion of the non-slip material from the protruding portion is set to 0.5 to 2.5 mm by forming the non-slip material, the protrusion of the non-slip material from the lower surface of the deck board can be increased. The portion to be formed can be reduced by the protrusion 16. Moreover, the steps 17, 17
Since the contact of the fork can be released by a, the thickness of the lower flange-shaped locking portion is relatively thin, 1 to 5 m.
Even with a non-slip material having a thickness dimension of m, it is possible to prevent breakage or pull-out due to contact with a fork.

[0019]

Next, an embodiment of the present invention will be described.
As shown in FIG. 6, the grommet-type material of the anti-slip member 20 is a SBR, 32 mm and overall height H, the thickness _{H 1} of the upper flange 21 5 mm, the thickness _{H 2} of the lower flange 23
Is 3.5 mm, and the outer diameter R ₁ of the upper flange 21 is 30 m.
m, 26 mm outer diameter _{R 2} of the lower flange 23, the body portion 25
21mm outside diameter _{R 3,} the diameter _{r 1} of the pin hole 27 8 mm of
The diameter _{r 2} of the through-hole 29 was set to 4mm. Change the projecting dimension T ₁ of the lower slip member by changing the protrusion dimension T ₂ of the protrusions 16, were tested for strength and slippage during fork collision.

The strength test was performed by a method as shown in FIG. That is, in the strength test of the non-slip material, 25 text cylinders 31 each weighing 20 kg were placed on the upper surface of the pallet 30. A fork 32 in which the tip surface of the pallet abuts against a wall 33 and is leveled.
Merge the fork insertion holes of the pallet 30, the height H ₃ lifted from the ground lifting to a height of 50 mm.
Continue moving the forklift at low speed and hit the tip of the fork against the grommet. In this manner, the fork is repeatedly moved forward and backward, and the tip of the fork is hit ten times. The case where no damage was found even after 10 times of striking was determined to be no damage, and the case where damage was caused during the 10 times of striking of the fork was regarded as broken. The strength test by this abutment was performed on three anti-slip materials in each of the left fork insertion hole and the right fork insertion hole.
Table 1 shows the test results.

[0021]

[Table 1]

The slip test for the non-slip material was performed according to JIS Z 06.
06-1993, and the angle at which slipping started was measured. Table 2 shows the measurement results.

[0023]

[Table 2]

As is clear from Tables 1 and 2, in the strength test of the non-slip material, one breakage was observed at 2.5 mm,
At 3.0 mm, half of the three pieces were broken. In the slip test of the non-slip material, the protrusion of the non-slip material is 0.5 m.
In Example 2 with m, the sliding started at an angle of 23 degrees, but in Example 3 with a protruding dimension of 1.0 mm, there was no slip even at an angle exceeding 30 degrees. From the above results, in order to prevent slippage between the fork the strength of the non-slip material, projecting dimension _{T 1} of the non-slip material is 0.5 to 2.5 mm, preferably 1.
Projecting dimension of the projecting portion 16 so as to 0~2.0mm _{T 2}
May be formed.

[0025]

The synthetic resin pallet according to the present invention
The grommet type non-slip material is formed integrally with flange-shaped locking portions at both ends of the cylindrical body portion, and the thickness of the flange-shaped locking portion facing the fork insertion hole is formed to 1 to 6 mm,
A protrusion for adjusting the protrusion dimension of the flange-shaped locking portion is formed below a forming portion for forming a mounting hole for a grommet-type anti-slip material, and a step difference due to an inclined surface or a curved surface is provided on a bottom surface of the protrusion. Therefore, it is possible to prevent the grommet-type non-slip material from being damaged or pulled out by the fork. Although the grommet can reduce the portion that actually protrudes, the grommet has a sufficient height from the lower surface of the deck board, so that the effect of preventing the grommet from sliding with the fork is not reduced. Furthermore, since the thickness of the flange-shaped locking portion on the side facing the fork insertion hole is set to a relatively small value of 1 to 5 mm, the slip stopper can be easily pulled out during recycling. Further, the grommets can be efficiently arranged, and the entire pallet can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory partial front view of a pallet according to the present invention.

FIG. 2 is a partially enlarged sectional view of a mounting hole forming portion for forming a mounting hole of the grommet type anti-slip material of the present invention.

FIG. 3 is a partially enlarged sectional view of another embodiment.

FIG. 4 is an explanatory perspective view of a pallet to which a grommet type non-slip member is attached.

FIG. 5 is an explanatory cross-sectional view showing a state in which a fork tip comes into contact with a grommet-type anti-slip member.

FIG. 6 is a cross-sectional view of a grommet-type non-slip material used in an example.

FIG. 7 is an explanatory diagram showing a grommet strength test method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Deck board 11 Grommet type anti-slip material mounting hole forming part 12 Non-slip material mounting hole 13 Grommet type anti-slip material 14 Upper step part 15 Lower step part 16 Projection part 17, 17a Difference in level

Continuation of the front page (72) Inventor Masahiro Samejima 1 Nobesawa, Kaisei-cho, Ashigara-gun, Kanagawa Prefecture Inside the Meiji Rubber Chemical headquarters factory (56) References Hikaru 3-126833 (JP, U) (58) Investigated Field (Int.Cl. ⁷ , DB name) B65D 19/32

Claims (4)

(57) [Claims] 1. A pallet having a grommet-type non-slip material attached to an appropriate position on a deck board, wherein the grommet-type non-slip material is formed integrally with flange-shaped locking portions at both ends of a cylindrical body. The thickness of the flange-shaped locking portion on the side facing the fork insertion hole of the
A protrusion protruding from the inner surface of the deck board on the side facing the fork insertion hole, of the mounting hole forming portion forming the mounting hole of the grommet type anti-slip material, the protrusion being formed to have a thickness of 6 mm; The end face of the flange-shaped locking portion of the grommet type anti-slip material is projected from the projecting portion by 0.5 to 2.
A pallet made of synthetic resin, wherein the pallet is formed so as to protrude by 5 mm and has a stepped surface formed by an inclined surface or a curved surface continuous with an inner surface of the deck board on a lower surface of the protruding portion. 2. The synthetic resin pallet according to claim 1, wherein the stepped blur is formed on an outer peripheral edge of a lower surface of the projecting portion. 3. The synthetic resin pallet according to claim 1, wherein the step difference is formed on the entire lower surface of the projecting portion. 4. The projection according to claim 1, wherein the projection is provided on the entrance side of a fork insertion hole, and a stepped surface formed by an inclined surface or a curved surface continuous with an inner surface of the deck board is formed on a lower surface of the projection. The synthetic resin pallet as described.