JP7313652B2 - Structure of non-slip part - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a structure of an anti-slip portion that is provided in a cargo carrier to prevent cargo, forks of a forklift, etc. from slipping.

Conventionally, this type of anti-slip portion has a structure in which an anti-slip member is press-fitted into a support tube portion of a baggage carrier (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 10-77037 (see FIG. 6)

However, in the structure of the conventional non-slip portion, water enters and accumulates in the space of the support cylinder portion during cleaning, and the water seeps out due to vibration and falls onto the load. Therefore, there is a demand for the development of a non-slip structure that prevents water from accumulating inside.

was made to solve the above problemsFirst aspect of the present disclosureis a structure of an anti-slip portion formed in a baggage carrier, comprising: a support cylinder portion having one end open and the other end closed by a first bottom wall; and a soft cap made of a soft resin that is fixed in a covering state and adheres tightly to the inner surface of the support cylinder. The structure of the non-slip portion includes an inner projection that protrudes from at least one of the first bottom wall and the second bottom wall and fills substantially the entire inner space of the support cylinder.

In the structure of the anti-slip portion of the first aspect of the present disclosure , the anti-slip member includes a soft resin-made soft cap fixed to one end side of a hard resin-made hard cylinder. As a result, the soft cap is crushed between the hard cylinder and the support cylinder, so that the waterproof function becomes higher than before, and it becomes difficult for water to enter the support cylinder. Moreover, since substantially the entire inner space of the support cylinder part is filled with the inner projecting part protruding from either the first bottom wall of the support cylinder part or the second bottom wall of the rigid cylinder part, even if water enters the support cylinder part, the amount of water accumulated in the support cylinder part is suppressed. As a result, it is possible to prevent the water from seeping out from the support cylinder and dropping onto the load.

The bottom side perspective view of the pallet of the first embodiment. Perspective view of non-slip part Cross-sectional side view of anti-slip member and support cylinder Perspective view of anti-slip member Perspective view of anti-slip member FIG. 11 is a side cross-sectional view of a process in which the anti-slip member is press-fitted into the support cylinder; Side sectional view of non-slip part Side sectional view of non-slip part The perspective view of the anti-slip member of 2nd Embodiment. The perspective view of the anti-slip member of 3rd Embodiment

[First embodiment]
Hereinafter, embodiments of the structure of the anti-slip portion 90 will be described with reference to FIGS. 1 to 8. FIG. FIG. 1 shows a pallet 30 made of hard resin as an example of a luggage carrier. The pallet 30 is formed by separately molding an upper part and a lower part from the center in the vertical direction and welding them together, so that the upper and lower surfaces have the same shape. Hereinafter, both upper and lower surfaces of the pallet 30 are referred to as a main plane 30S.

The planar shape of the pallet 30 is rectangular, and a pair of fork insertion holes 31 in both the longitudinal direction and the lateral direction of the pallet 30 penetrate the entire pallet 30 . A pair of anti-slip portions 90 are arranged in each of the quadrangular intersection areas where the vertical and horizontal fork insertion holes 31 of the main plane 30S face the intersection portions. In addition, a plurality of anti-slip portions 90 are arranged at equal intervals along the lateral direction at positions near both ends in the longitudinal direction of the main plane 30S. In addition, a plurality of (for example, four) anti-slip tapes 40 extending in the longitudinal direction are attached to each main surface 30S, and the anti-slip portions 90 near both ends in the longitudinal direction of the main surface 30S are arranged in the center in the width direction of each divided area partitioned by the plurality of anti-slip tapes 40.

Each anti-slip portion 90 is formed by press-fitting the anti-slip member 10 into the support cylinder portion 32 . As shown in FIG. 2 , the support cylinder portion 32 is formed integrally with the ribs 30</b>L forming the crosspiece structure of the pallet 30 . Then, as shown in FIG. 1, with respect to the anti-slip portions 90 located near both ends in the longitudinal direction of the main plane 30S, one end of the support cylinder 32 opens to the main plane 30S of the pallet 30, and the other end of the support cylinder 32 is closed by the first bottom wall 33 (see FIG. 3), and the outer surface of the first bottom wall 33 is flush with the inner surface of the fork insertion hole 31. On the other hand, with respect to the anti-slip portion 90 in each crossing region described above, one end of the support cylinder portion 32 opens to the inner surface of the fork insertion hole 31, the other end of the support cylinder portion 32 is closed by the first bottom wall 33, and the outer surface of the first bottom wall 33 is flush with the main plane 30S of the pallet 30.

FIG. 3 shows details of the structure of the support tube portion 32 . Hereinafter, unless otherwise specified, the “upper side” means the opening side of the support tube portion 32 , and the “lower side” means the first bottom wall 33 side of the support tube portion 32 .

The inner side surface 35 of the support cylinder portion 32 is divided into an upper opening side fitting portion 35B and a lower bottom side fitting portion 35E from the approximate center in the vertical direction. The opening-side fitting portion 35B has a cylindrical surface parallel to the axial direction of the support cylinder portion 32, while the bottom-side fitting portion 35E has a tapered surface whose diameter gradually decreases downward.

First and second intermediate chamfered portions 35C and 35D are provided side by side between the opening side fitting portion 35B and the bottom side fitting portion 35E. The taper angle of the second intermediate chamfered portion 35D is slightly larger than that of the bottom fitting portion 35E, and the taper angle of the first intermediate chamfered portion 35C is slightly larger than that of the second intermediate chamfered portion 35D. Further, the corner where the opening-side fitting portion 35B and the upper surface of the support cylinder portion 32 intersect is an arc-shaped chamfered surface 35A.

A plurality of inner surface protrusions 36 are provided in the opening-side fitting portion 35B so as to be arranged at regular intervals in the circumferential direction. Each inner surface protrusion 36 extends with a uniform width from the upper end of the opening side fitting portion 35B to the position closer to the lower end of the first intermediate chamfered portion 35C, and the surface of the inner surface protrusion 36 facing the center side of the support cylinder portion 32 is an arc surface 36B that constitutes a part of the cylindrical surface concentric with the opening side fitting portion 35B. The upper end of the inner projection 36 forms a slope 36A that is substantially continuous with the lower end of the chamfered surface 35A and that slopes down toward the center of the support cylinder 32. As shown in FIG. Further, both side portions of the inner surface protrusion 36 are also inclined surfaces 36C.

From the inner surface of the first bottom wall 33 of the support tube portion 32 , a cylindrical first inner protrusion 37 concentric with the support tube portion 32 protrudes. The inner peripheral surface and the outer peripheral surface of the first inner protrusion 37 are cylindrical surfaces parallel to the central axis of the support tube portion 32 . The tip of the support cylinder 32 is located near the upper end of the opening-side fitting portion 35B, and the portion of the first bottom wall 33 located inside the first inner projection 37 is slightly above the portion located outside.

The description about the structure of the support cylinder part 32 is above. Next, the structure of the anti-slip member 10 will be described. The anti-slip member 10 is formed by fixing a rigid cylindrical body 20 made of hard resin and a soft cap 11 made of soft resin.

The hard cylinder 20 has a shape in which the lower end is open in the opposite direction to the support cylinder portion 32 and the upper end is closed by the second bottom wall 23 . A flange portion 21 protrudes laterally from an intermediate position in the axial direction of the rigid cylinder 20 . The flange portion 21 has a trapezoidal cross-sectional shape and is tapered toward the tip. The distal end of the flange portion 21 has a flange outer surface 21B parallel to the axial direction of the rigid cylinder 20, a cap fixing surface 21C perpendicular to the axial direction above the flange outer surface 21B, and a flange tapered surface 21A whose diameter decreases downward on the side opposite to the cap fixing surface 21C across the flange outer surface 21B.

A portion above the flange portion 21 of the outer surface of the hard cylindrical body 20 forms a tapered portion 24H that slightly narrows upward, while a portion below the flange portion 21 forms a tapered portion 24G that slightly narrows downward. Further, the taper angle of the tapered portion 24G is substantially the same as that of the bottom side fitting portion 35E of the support cylinder portion 32 described above. In addition, the outer diameter of the portion of the rigid cylinder 20 above the flange portion 21 is generally smaller than the outer diameter of the portion below it. Further, an arc-shaped chamfered surface 24K is formed at the corner between the tapered portion 24G and the lower end surface of the hard cylindrical body 20. As shown in FIG.

Inner surface ridges 28 protrude from a plurality of locations (for example, four locations) in the circumferential direction at positions directly behind the flange taper surface 21A on the inner surface of the hard cylindrical body 20 . The inner ridge 28 has a semicircular cross section and extends in the circumferential direction as shown in FIG.

As shown in FIG. 3 , a second inner protrusion 27 protrudes from the center of the inner surface of the second bottom wall 23 . The lower end surface of the second inner protrusion 27 is positioned slightly above the lower end surface of the hard cylindrical body 20 . An annular groove 14 is formed in a recessed state on the outer surface of the second bottom wall 23 . The annular groove 14 is located midway between the inner surface of the hard cylinder 20 and the outer surface of the second inner protrusion 27 in the radial direction of the hard cylinder 20 .

The soft cap 11 has a cap structure in which one end of the cylindrical wall 13 is closed with the bottom wall 12, and covers the upper portion of the hard cylindrical body 20 from the cap fixing surface 21C. The soft cap 11 is fixed to the hard cylinder 20 by, for example, molding, and the annular groove 14 is filled with a part of the soft cap 11 . Furthermore, the tip surface of the soft cap 11 is fixed to the cap fixing surface 21C of the flange portion 21, and the outer surface 16 of the soft cap 11 forms a cylindrical surface parallel to the axial direction of the anti-slip member 10 and is flush with the flange outer surface 21B of the flange portion 21. As shown in FIG. 5, the upper surface 15 of the second bottom wall 23 forms a horizontal surface 15A from the center to the upper portion of the annular groove 14, and the portion outside the horizontal surface 15A forms an inclined surface 15B that gently descends outward. Further, the corner where the upper surface 15 and the outer surface 16 intersect is an arc-shaped chamfered surface 15K.

In addition, as hard resin which comprises the above-mentioned pallet 30 and the hard cylinder 20, polyolefin-type resin and polyamide-type resin are mentioned, for example. Moreover, the resins forming the pallet 30 and the rigid cylindrical body 20 may be the same or different. On the other hand, examples of the soft resin forming the soft cap 11 include elastomers (styrene, polyester, olefin, polyamide, urethane), vulcanized rubber, and the like. Further, the material cost of the hard resin of the hard cylindrical body 20 is lower than that of the soft resin of the soft cap 11 .

The anti-slip member 10 is press-fitted into the support cylinder portion 32 and assembled. Specifically, as the anti-slip member 10 is fitted to the support cylinder portion 32, as shown in FIG. When the anti-slip member 10 is pushed into the support cylinder part 32 from there, the flange part 21 rides up on the inner surface projection part 36, then the cylinder wall 13 of the soft cap 11 also rides up on the inner surface projection part 36 and is fitted into the support cylinder part 32, and the second inner projection part 27 is fitted into the first inner projection part 37. Then, as shown in FIG. 7, the lower end portion of the anti-slip member 10 abuts or adjoins the first bottom wall 33, and the upper end portion of the first inner projection 37 abuts or adjoins the second bottom wall 23, so that further fitting is no longer possible, and the installation work (press-fitting work) of the anti-slip member 10 to the support cylinder portion 32 is completed.

Then, the upper surface 15 of the soft cap 11 bulges slightly outward from the upper surface of the support cylinder portion 32 of the pallet 30 . As a result, the soft cap 11 abuts on cargo and forks of a forklift to prevent them from slipping. 8A, the flange portion 21 is located at the lower end of the opening-side fitting portion 35B in the support cylinder portion 32. Above the flange portion 21, the outer surface 16 of the soft cap 11 is in close contact with the opening-side fitting portion 35B on the inner surface of the support cylinder portion 32. Below the flange portion 21, the tapered portion 24G of the soft cap 11 and the bottom-side fitting portion 35E on the inner surface of the support cylinder portion 32 are adjacent.

Specifically, the cylindrical wall 13 of the soft cap 11 is pinched and crushed between the hard cylindrical body 20 and the support cylindrical portion 32, and as shown in FIG. 8A, the outer surface 16 of the soft cap 11 is in close contact with the portion of the opening side fitting portion 35B where the inner surface protrusion 36 is formed, and as shown in FIG. do. Also, the tapered portion 24G of the soft cap 11 and the bottom-side fitting portion 35E of the support cylinder portion 32 are parallel and adjacent to each other with a small gap therebetween. Furthermore, the space of the support cylinder portion 32 is filled with the first and second inner protrusions 27 and 37 .

As described above, in the structure of the anti-slip portion 90 of the present embodiment, the anti-slip member 10 has a structure in which the soft cap 11 made of soft resin is fixed to one end side of the hard cylindrical body 20 made of hard resin. In addition, since the outer surface 16 of the soft cap 11 and the opening side fitting portion 35B of the inner surface of the support cylinder portion 32 to which it is fitted are both parallel to the central axis of the support cylinder portion 32, the range in which they are in close contact with each other is widened and high waterproof performance is obtained. Moreover, since substantially the entire inner space of the support cylinder part 32 is filled with the first and second inner projecting parts 27, 37 protruding from the first bottom wall 33 of the support cylinder part 32 and the second bottom wall 23 of the hard cylinder body 20, even if water enters the support cylinder part 32, the amount of water accumulated in the support cylinder part 32 is suppressed. As a result, it is possible to prevent the water from seeping out from the support tube portion 32 and falling on the luggage.

In addition, since the flange portion 21 laterally protrudes from the axially intermediate portion of the hard cylinder 20 and abuts against the inner surface of the support cylinder 32, the anti-slip member 10 is stabilized in the support cylinder 32, and the waterproof function and the anti-slip function of the soft cap 11 are stabilized. In addition, the distal end surface of the soft cap 11 is fixed to the flange portion 21, and the distal end of the flange portion 21 is provided with the flange outer surface 21B that is flush with the outer surface 16 of the soft cap 11. Therefore, when the anti-slip member 10 is press-fitted into the support tubular portion 32, the soft cap 11 portion is prevented from being rolled up and separated from the hard tubular body 20.

As the inner protrusion, a third inner protrusion (not shown) protruding from the first bottom wall 33 and having a cylindrical shape with a closed tip may be provided. In this case, the inner space of the third inner protrusion opens to the outer surface of the first bottom wall 33, and water tends to accumulate inside the third inner protrusion from there. On the other hand, as in the structure of the anti-slip portion 90 of the present embodiment, if the cylindrical first inner protrusion 37 protrudes from the first bottom wall 33 and has an open end, and the columnar second inner protrusion 27 protrudes from the second bottom wall 23 and is fitted inside the first inner protrusion 37, and the outer surface of the first bottom wall 33 is flattened, water will not accumulate inside like the third inner protrusion described above.

[Second embodiment]
An anti-slip member 10A of this embodiment is shown in FIG. 9, and has a plurality of side projections 41 integrally formed on a rigid cylindrical body 20. As shown in FIG. The plurality of side projections 41 extend from the flange portion 21 to the upper end portion of the tapered portion 24H (see FIG. 3), and are arranged at positions that equally divide the circumferential direction of the tapered portion 24H. Further, each side protrusion 41 is provided with an arc-shaped outer side surface 41A that is flush with the flange outer side surface 21B. Furthermore, although not shown, the tubular support portion of the present embodiment has a structure in which the plurality of inner projections 36 are eliminated from the tubular support portion 32 of the first embodiment.

According to the configuration of the present embodiment, since the plurality of side projections 41 are provided, the amount of soft resin forming the soft cap 11 can be suppressed, and the soft cap 11 can be manufactured at low cost.

[Third embodiment]
The anti-slip member 10B of this embodiment is shown in FIG. 10, and has a structure in which side projections 42 are integrally formed at positions dividing the soft cap 11 in the circumferential direction into a plurality of equal parts. The side protrusion 42 has a trapezoidal cross section and extends from the lower end of the outer surface 16 of the soft cap 11 to a position closer to the upper end. Further, the upper end of the side protrusion 42 is an inclined surface 42A. Although not shown, the support cylinder portion of this embodiment also has a structure in which the plurality of inner surface protrusions 36 are eliminated from the support cylinder portion 32 of the first embodiment.

The side protrusion 42 of the soft cap 11 of the present embodiment may be eliminated, and the simple cylindrical outer surface 16 of the soft cap 11 and the cylindrical inner surface of the support cylinder 32 may be in close contact with each other.
[Other embodiments]

(1) In the first embodiment, the first inner projection 37 inside the support tube portion 32 has a cylindrical shape, and the second inner projection 27 inside the anti-slip member 10 is fitted inside the first inner projection 37. Alternatively, the first inner projection 37 inside the support tube portion 32 may be formed in a column shape, the second inner projection 27 may not be provided inside the anti-slip member 10, and the space inside the anti-skid member 10 may be filled only by the first inner projection 37. Good.

(2) In the above-described embodiment, the anti-slip portion 90 is provided on the pallet 30 as the cargo conveying device, but the anti-slip portion 90 may be provided on a cargo conveying device other than the pallet (for example, a trolley or a container).

(3) In the first embodiment, both the outer surface 16 of the soft cap 11 and the inner surface of the support cylinder 32 to which it fits are parallel to the central axis of the anti-slip member 10, but only one of them may be made parallel to partially increase the contact pressure between the outer surface 16 of the soft cap 11 and the inner surface of the support cylinder 32, thereby enhancing the prevention.

REFERENCE SIGNS LIST 10, 10A, 10B Anti-slip member 11 Soft cap 16 Outer surface 20 Hard cylinder 21 Flange 21A Flange tapered surface 21B Flange outer surface 21C Cap fixing surface 23 Second bottom wall 27 Second inner protrusion 30 Pallet (cargo carrier)
32 Support cylinder part 33 First bottom wall 35 Inner surface 37 First inner projection 90 Non-slip part

Claims (4)

A structure of an anti-slip portion formed in a luggage carrier, comprising: a support tube portion having one end open and the other end closed by a first bottom wall; and an anti-slip member press-fitted into the support tube portion,
The anti-slip member is
a rigid cylinder made of a rigid resin having a cylindrical shape with one end open in the opposite direction to the support cylinder and the other end closed by a second bottom wall;
a soft cap made of a soft resin fixed in a state of covering one end surface and an outer surface of the hard cylinder on the side of the second bottom wall and in close contact with the inner surface of the support cylinder,
an inner protrusion that protrudes from at least one of the first bottom wall and the second bottom wall and fills substantially the entire inner space of the support cylinder;
The inner projection has a structure of a non-slip portion, which includes a cylindrical first inner projection that protrudes from the first bottom wall and has an opening at its tip, and a second inner projection that protrudes from the second bottom wall and has a columnar shape and is fitted inside the first inner projection. 2. The structure of the non-slip portion according to claim 1, further comprising an inner surface projection that protrudes inward from a midway position in the axial direction of said hard cylindrical body and abuts on an outer surface of said first inner projection. A structure of an anti-slip portion formed in a luggage carrier, comprising: a support tube portion having one end open and the other end closed by a first bottom wall; and an anti-slip member press-fitted into the support tube portion,
The anti-slip member is
a rigid cylinder made of a rigid resin having a cylindrical shape with one end open in the opposite direction to the support cylinder and the other end closed by a second bottom wall;
a soft cap made of a soft resin fixed in a state of covering one end surface and an outer surface of the hard cylinder on the side of the second bottom wall and in close contact with the inner surface of the support cylinder,
an inner protrusion that protrudes from at least one of the first bottom wall and the second bottom wall and fills substantially the entire inner space of the support cylinder;
a plurality of inner surface protrusions projecting from a plurality of positions in the circumferential direction of the inner surface of the support cylinder and extending in the axial direction of the support cylinder ;
a chamfered surface formed on the opening edge of the support cylinder,
An anti-slip structure in which the plurality of inner surface projections have an arcuate surface concentric with the inner surface of the support cylinder, and slopes formed between the arcuate surface and the chamfered surface and on both sides of the arcuate surface. a flange portion that protrudes laterally from an intermediate position in the axial direction of the rigid cylinder and that is thinner toward the distal end;
a cap fixing surface provided on the flange portion to which the tip surface of the soft cap is fixed;
a flange outer surface provided on the flange portion and flush with the outer surface of the soft cap;
4. The non-slip portion structure according to any one of claims 1 to 3, further comprising a flange tapered surface disposed on the opposite side of the cap fixation surface with the flange outer surface interposed therebetween and having a diameter that decreases as the distance from the cap fixation surface increases.

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