KR20030006875A - Pallet made of synthetic resin - Google Patents

Abstract

PURPOSE: To eliminate a problem in which extremity ends of four corners of a synthetic resin pallet show a low strength against a shock applied from an inclined direction to a surface of the pallet. CONSTITUTION: The synthetic resin pallet is made such that an upper deck board and a lower deck board are connected with supporting columns of hollow structure, and a clearance enclosed by the supporting columns, the upper deck board and the lower deck board is applied as a fork insertion port. This synthetic resin pallet has a feature that partition ribs crossed at a right angle with the side surfaces of the pallet are arranged to form a hollow closed segment at an outer corner part together with side walls of the columns, reinforcing ribs placed on a substantial diagonal line and reinforcing ribs connected to the reinforcing ribs on the diagonal line are arranged in the hollow segment. The partition ribs forming the hollow segment are preferably connected at the substantial central parts of the supporting columns and formed at the same height as that of the supporting columns.

Description

PALLET MADE OF SYNTHETIC RESIN}

The present invention relates to a pallet made of synthetic resin for forklift, which is used for storing and transporting cargo, and in particular, a holding part made of a hollow structure is excellent in impact resistance against the fork of the forklift, and has strength against impact in case of dropping. It relates to a synthetic resin pallet having.

Background Art Conventionally, as forklift pallets used for storing and transporting cargo, synthetic resin pallets having excellent corrosion resistance and stain resistance are widely used. This kind of pallet connects the upper deck board and the lower deck board with the hollow strut which is installed at its four corners and the middle, and the space surrounded by the strut and the upper deck board and the lower deck board is the forklift's fork. It has a fork insertion hole for inserting.

The deck board and the support portion in the fork insertion port of the above configuration are not only subjected to high loads when the load is placed, but also to contact and impact of the forks during the unloading operation by the forklift. In addition, the tip corner portion of the four corner support portion may collide with the ground or the like when falling in the inclined direction. Synthetic resin pallets have a problem in that they are easily damaged due to poor impact resistance to forks compared to wooden pallets. Therefore, in a synthetic resin pallet, a rib structure for providing a high strength against the impact of the fork has been proposed. For example, as a pallet which reinforced the support | pillar part, the pallet described in Unexamined-Japanese-Patent No. 9-175534, Unexamined-Japanese-Patent No. 4-242540, etc. are mentioned.

The pallet described in this publication is provided with a partition wall facing the center portion diagonally from a corner portion to a center portion inside a support portion formed of a hollow structure, and a partition wall intersecting with the partition wall along the insertion direction of the fork. In such a structure, the strength in the diagonal direction from the corner portion of the support portion can be strengthened, but it cannot be said that the strength from the perpendicular direction of the support portion is necessarily sufficient.

In addition, although all the pallets described in the said publication can improve the intensity | strength of a support | pillar part, the relationship with a deck board is not considered. However, it was found that the rib structure of the deck board and the strut part structure are related to each other, and the relationship between the two is important to increase the impact resistance against the fork. In addition, when the fork is inserted, the support portion is also impacted from the inclined direction. The pallet described in this publication has a problem that it does not have sufficient strength against impact from the inclined direction of the fork due to the forklift. In addition, in the structure of the pallet strut portion described in the above publication, the tip corner portion of the four corner strut portion does not necessarily have sufficient strength when it collides with the ground or the like.

The present invention has been made to solve the above problems, and a first object of the present invention is to provide a pallet made of synthetic resin to increase the impact resistance of the four-corner holding portion for the fork of the forklift.

Further, a second object of the present invention is to provide a pallet made of synthetic resin that improves the impact resistance strength of the support part when it falls and collides with the ground or the like.

1 is a front view of a pallet showing an embodiment of the present invention.

FIG. 2 shows a half of the pallet, with the left half top view and the right half bottom view of the upper deck board in X-X of FIG. 1.

Fig. 3 is a perspective view showing main parts of four corner portions of the upper deck board.

4 is a perspective view of another similar embodiment.

5 is a perspective view for explaining an impact in a support portion during dropping;

6 is an enlarged cross-sectional view of the inside of a four corner supporter showing the impact resistant structure at the time of falling.

<Explanation of symbols for main parts of drawing>

1: pallet

3: upper deck board

5: lower deck board

7: 4 corner holdings

7a: opening edge of the support post 7

7b, 7c: reinforcement rib

7d: connecting rib

9: middle holding part

9a: opening edge of the strut 9

9b, 9c: reinforcement rib

9d: connecting rib

10: central holding part

11: fork insertion hole

15: split surface

16: Reinforcement rib of inner corner part of 4 corner support part

17: reinforcing rib on the diagonal

17b, 17c, 17d: divider rib

18: reinforcement rib

20: The closed hollow part in the outer corner part of a 4 corner support part

21: hollow part

30: top plate

31: horizontal reinforcement rib

31a: reinforcement rib

33: longitudinal reinforcement rib

33a: reinforcement rib

35: perforation

In order to achieve the object of improving the impact resistance of the four-corner holding portion for the fork of the forklift, the present invention was configured as follows. That is, the synthetic resin pallet of the present invention is a pallet in which the upper deck board and the lower deck board are connected to the pillars of the hollow structure, and the voids surrounded by these pillars, the upper deck board, and the lower deck board are the fork insertion holes. In this pallet, a deck board is provided by providing a reinforcement rib in the upper plate, and forms the opening edge of the side wall facing the fork insertion opening of the four corner support part and the intermediate support part by the inclined surface or curved surface which spreads toward an opening. Then, the inclined reinforcing ribs are provided in a direction substantially perpendicular to the tangent of the inclined surface or the curved surface, and the inclined reinforcing ribs and the orthogonal reinforcing ribs provided so as to be orthogonal to the side of the pallet are parallel to the side of the pallet. Connect integrally via connecting ribs. This connecting rib is made by installing almost in line with the reinforcing rib installed on the deck board. The orthogonal reinforcing rib is integrally connected with the reinforcing rib in the support portion of the deck board.

The said connecting rib may be provided over the whole height of a support | pillar part, and may be made the same height as the reinforcement rib of a deck board. Moreover, it is preferable to install the inclined reinforcement rib in the intermediate support part at both sides of the intermediate support part, and to install it symmetrically centering on the center part of the intermediate support part. Further, the inclined reinforcing ribs of the four corner strut portions can be provided to face each other on the same line.

Moreover, in order to achieve the objective which improves the impact strength of a support | pillar part when it falls and collides with the ground etc., it was set as the following structures. That is, the synthetic resin pallet of the present invention is a pallet in which the upper deck board and the lower deck board are connected to the pillars of the hollow structure, and the voids surrounded by these pillars, the upper deck board, and the lower deck board are the fork insertion holes. A partition rib orthogonal to the side of the pallet is provided inside the four corner support part of the synthetic resin pallet, and a side wall of the support part and a hollow part sealed by the partition rib are formed in the outer corner part of the support part. This is achieved by providing a reinforcing rib on an approximately diagonal line and a reinforcing rib connected to the reinforcing rib on this diagonal line.

The partition rib forming the hollow portion is preferably connected at approximately the center portion of the support portion and formed at the same height as the support portion. Further, the height of the reinforcing ribs on the substantially diagonal in the hollow portion and the reinforcing ribs connected to the reinforcing ribs on the diagonal portion can be made lower than the partition rib forming the hollow portion. Moreover, it is preferable to provide the partition rib which forms a hollow part, and the reinforcement rib connected to the reinforcement rib on a diagonal line in substantially parallel.

EMBODIMENT OF THE INVENTION Below, embodiment of this invention is described in detail based on drawing. 1 to 4 show an example of a four-way insertion pallet. This four-way inserting pallet (1) has a top deck board (3) and a lower deck board (5) of four corner posts (7), an intermediate post (9) and a central post (10) installed in the middle thereof. It is connected to the upper deck board (3), the lower deck board (5) and the space surrounded by the holding portion (7, 9) is a pallet with a fork insertion hole (11). The four-way inserting pallet (1) includes an upper part (1A) having an upper deck board formed by dividing and molding into a horizontal dividing surface (15) in a substantially central portion of each strut portion, and a lower part having a lower deck board ( 1B) is formed by joining and welding on the divided surface 15.

Connection portion 7A to which the upper deck board is connected to the support portion, Connection portion 7Bb to which the lower deck board is connected to the support portion, Connection portion 9A at which the upper deck board is connected to the support portion, and Lower deck board to the support portion The connecting part 9B to be formed is formed in the same cross-sectional shape as each strut part connected, and comprises the hollow structure closed with each strut part. The surface of the upper deck board 3, the surface of the lower deck board of the portion connected to the support portion, and the upper surface facing the fork insertion hole of the lower deck board are formed on the smooth surface, respectively, Reinforcement ribs are installed.

Subsequently, the configuration of the present invention will be described for the portion where the upper deck board 3 is connected to each of the support portions 7 and 9, that is, the connection portions 7A and 9A. The upper deck board 3 is made by forming the reinforcing ribs 31 and 33 longitudinally and horizontally on the upper plate 30 and the bottom surface of the upper plate 30. That is, when the bottom surface of the upper plate 30 is based on one side, for example, based on the lower side of FIG. 2, the transverse reinforcing ribs 31 in the direction orthogonal to the fork insertion direction, that is, in the horizontal direction, And the longitudinal reinforcing rib 33 parallel to the fork insertion direction, that is, in the vertical direction. A perforation 35 may be provided in the upper plate 30 facing the fork insertion port in the portion surrounded by the reinforcing ribs 31 and 33 provided vertically and horizontally in order to discharge foreign matter or water that has penetrated the inside.

The opening edges 7a and 9a of the side walls facing the fork insertion holes 11 of the four corner posts 7 and 7 and the intermediate posts 9 are widened toward the openings for easy insertion of the forks, It is formed in the inclined surface or curved surface in the plane (refer FIG. 2). Incidentally, the inclined reinforcing ribs 7b and 9b are provided in the four corner posts 7 and the intermediate posts 9 in a direction substantially orthogonal to the tangent of the opening edges 7a and 9a of the inclined or curved surface. Orthogonal reinforcement ribs 7c and 9c which are provided and orthogonal to the side surface of the pallet are provided. The inclined reinforcing rib 7b and the orthogonal reinforcing rib 7c are connected by connecting ribs 7d parallel to the side, and the inclined reinforcing rib 9b and the orthogonal reinforcing rib 9c are parallel connected to the side It is connected by the rib 9d.

Further, the orthogonal reinforcement ribs 7c in the four corner support portions 7 are reinforcement ribs in the connection portion 7A of the reinforcement ribs 31 and 33 provided on the bottom surface of the upper deck board 3 ( 31a) or integrally connected with the reinforcing rib 33a. In addition, the connecting ribs 7d are provided on substantially the same line as the reinforcing ribs 31 or the reinforcing ribs 33, and thus, the reinforcing ribs 31 are provided through the inclined reinforcing ribs 7b and a part of the opening edge 7a. Or on a substantially straight line with the reinforcing rib 33.

On the other hand, also in the intermediate | middle strut part 9, it is formed similarly to the four corner strut 7. That is, the orthogonal reinforcing ribs 9c are integrally connected to the reinforcing ribs 33a provided on the bottom surface of the upper deck board 3 in the connecting portion 9a, and the connecting ribs 9d are reinforcing ribs 31. It is installed on approximately the same line as. Thus, the connecting ribs 9d are integrally connected to the reinforcing ribs 31 in a substantially straight line via a part of the inclined reinforcing ribs 9b and the opening edge 9a.

The inclined reinforcing ribs 9b and 9b in the intermediate support 9 are provided on both sides of the intermediate support 9 and are symmetrical around the center of the intermediate support 9. Further, in the four corner struts 7, the inclined reinforcing ribs 7b and 7b provided on the opening edge 7a are provided to face substantially on the same line, and are substantially symmetrical with a diagonal line between them.

The reinforcing ribs 7b and 7c and the reinforcing ribs 9b and 9c are formed at the same height as the height of the supporting portion only by a predetermined width from the supporting wall, and the connecting ribs 7d and the connecting ribs 9d are continuous reinforcing ribs thereof. It is preferable to form the height of the deck board together with the portions 7b and 7c and the reinforcement ribs 9b and 9c, that is, the same height as the reinforcement ribs 31a and 33a in the connection portions 7A and 9a. The reinforcing ribs 7b and 7c and the reinforcing ribs 9b and 9c may all be formed at the same height as the height of the support portion. Also within the same support, for example, in Fig. 2, the reinforcing ribs 7b and 7c and the connecting ribs 7d on the side facing the fork insertion port in the horizontal direction are formed at the same height as the height of the support 7 On the other hand, only the reinforcing ribs 7b and 7c on the side facing the fork insertion port in the vertical direction are formed at the same height as the height of the support 7, and the connecting ribs 7d are the same height as the reinforcing ribs 31a and 33a. May be formed.

As described above, the orthogonal reinforcing ribs 7c and 9c provided in the direction orthogonal to the side surfaces of the pallet are provided with the reinforcing ribs 31a and 9a in the connection portions 7A and 9a of the reinforcing ribs 31 and 33 of the deck board. Since the reinforcing ribs 31a and 33a intersect in the coupling portions 7A and 9A, the reinforcing ribs 31a and 33a are integrally provided with 33a), there is no risk of deformation or damage even if the fork collides in parallel with the insertion direction. In addition, the reinforcing ribs 7b and 9b are not only integrally connected to the reinforcing ribs 7c and 9c by the connecting ribs 7d and 9d, but also connected to the reinforcing ribs 31 and 33 via the opening edges. Therefore, it can have impact resistance also against the impact from the inclination direction of a fork.

In addition, although the upper deck board 3 was demonstrated in the said embodiment, the lower deck board 5 can also be formed similarly. In order to avoid duplication, the description of the lower deck board 5 is omitted. In addition, although the four-way insertion pallet was demonstrated in the said embodiment, it may be a two-way insertion pallet, Of course, it is not limited to one side use pallet, It may be a double side use pallet.

Next, an embodiment of the reinforcing structure when the pallet falls and collides with the ground or the like will be described.

FIG. 5: is explanatory drawing at the time of the front-end corner part of the four corner support part 7 of a pallet colliding with the ground. The internal structure of the four corner strut 7 is as shown in FIG. The four corner struts 7 are provided with partition ribs 17b in a direction substantially orthogonal to the tangent of the opening edge 7a of the inclined or curved surface, and the partition ribs 17c orthogonal to the sides of the pallet are provided. It is installed.

Further, in the four corner support portions 7, the partition ribs 17b and 17b provided on the opening edge 7a are provided to face each other substantially on the same line, and are substantially symmetrical with a diagonal line therebetween. The partition ribs 17c and 17c are connected at almost the center of the four corner strut. The partition rib 17b and the partition rib 17c are connected by partition ribs 17d parallel to the sides of the pallet.

The partition ribs 17b, 17c, and 17d are formed at the same height as the support portions and are welded on the divided surfaces. Accordingly, the hollow portion 20 sealed by the partition ribs 17c and 17c and the hollow portion 21 sealed by the partition ribs 17b, 17c, and 17d are formed inside the support portion 7. . Moreover, reinforcement ribs 15 and 15 are provided on the extension line of the said partition rib 17c.

In addition, reinforcing ribs 16, 16 parallel to the side surfaces of the pallet are provided at the corners of the pallet center portion side of the four corner support portions 7, and form a flat rectangular shape together with the side walls of the support portions 7. Doing. The reinforcing ribs 15 and 16 are formed at the same height as the height of the support portion only from a side wall of the support portion, and are welded on the divided surface.

Reinforcement ribs 17 and 18 are provided in the hollow part 20 of the four corner support part 7. This reinforcement rib 17 is provided on a diagonal line, and connects the corner part of a support part, and the connection part 19 of partition rib 17c, 17c. The reinforcing rib 18 is provided so as to orthogonal to the side surface of the pallet like the reinforcing rib 17c, and is connected with the substantially intermediate part of the reinforcing rib 17. As shown in FIG. The reinforcing ribs 17 and 18 may be formed at the same height as the reinforcing ribs 15 and 16.

As described above, the outer corner portion of the four corner support portion 7 is provided with a reinforcing rib 17 on a substantially diagonal, and a reinforcing rib 18 connected to the reinforcing rib 17 and orthogonal to the side of the pallet. Thus, as shown in Fig. 5, there is no fear of deformation or damage even when a shock is received from the inclined direction with respect to the surface of the bottom deck board by dropping or the like. In addition, the impact resistance can be further increased by connecting the reinforcing rib 17 with the connecting portions 19 of the reinforcing ribs 17c and 17c.

In addition, although the 4 corner support part of the lower deck board 5 was demonstrated in the said 2nd embodiment, it can also form in the upper deck board 3 similarly. The description of the upper deck board is omitted to avoid duplication. In addition, although the four-way insertion pallet was demonstrated in the said embodiment, it may be a two-way insertion pallet, of course, and it can apply also to any of a double-sided use pallet and a single-sided use pallet.

The synthetic resin pallet according to the present invention is provided with a reinforcing rib in a direction substantially the same as the impact direction of the fork in the support, and the reinforcing rib is connected to the reinforcing rib in the support provided on the deck board, thereby providing excellent impact resistance. The structure ensures that the forks do not easily deform or break even when they collide. In addition, since the strength can be increased without being thickened by being installed on substantially the same line as the reinforcing rib of the deck board, the weight of the pallet itself is not increased, which is advantageous in terms of molding.

Further, the synthetic resin pallet according to the present invention is provided with a partition rib orthogonal to the side of the pallet in the four corner support portion to form a hollow portion sealed to the outer corner portion of the four corner support portion, and in this hollow portion, a substantially diagonal reinforcement. A rib and a reinforcing rib connected to the reinforcing rib on this diagonal line were provided. Therefore, it is excellent in impact resistance against the impact from the inclination direction with respect to the surface of a pallet, and it does not become easy to deform | transform or break even against the collision by a fall. In addition, since the impact strength can be increased without increasing the thickness of the deck board or the support portion, the weight of the pallet itself is not increased, which is advantageous in terms of molding.

Claims (9)

In a pallet connecting the upper deck board and the lower deck board to the hollow struts, and the fork inserting the voids surrounded by these struts and the upper deck board and the lower deck board, the fork of the side walls of the four corner struts and the middle struts An opening edge facing the insertion hole is formed as an inclined surface or curved surface extending toward the opening, and in each support portion, an inclined reinforcing rib is provided in a direction substantially perpendicular to the tangent of the inclined surface or curved surface. The ribs and orthogonal reinforcement ribs installed so as to be perpendicular to the side of the pallet are integrally connected by connecting ribs parallel to the side of the pallet, and the connecting ribs are formed in approximately the same line as the reinforcing ribs installed on the deck board. Further, the orthogonal reinforcing ribs are integrally connected with the reinforcing ribs of the deck board in the support portion. Synthetic resin pallet. The synthetic resin pallet according to claim 1, wherein the connecting rib is formed at the same height as the support portion. The synthetic resin pallet according to claim 1, wherein the connecting rib has the same height as the reinforcing rib of the deck board. The synthetic resin agent according to any one of claims 1 to 3, wherein the inclined reinforcing ribs in the intermediate support portion are provided on both sides of the intermediate support portion and symmetrically provided about the central portion of the support portion. Pallet. The synthetic resin pallet according to any one of claims 1 to 3, wherein inclined reinforcing ribs of the four corner support portions are provided to face each other on the same line. The inclined reinforcement rib in the said intermediate | middle support part is provided in the both sides of the intermediate support part, is provided symmetrically about the center part of the support part, and the said 4 corner support part is given. A synthetic resin pallet characterized by having inclined reinforcing ribs facing each other on the same line. A plastic pallet comprising an upper deck board and a lower deck board connected to a hollow strut, and having a fork inlet with voids surrounded by these struts and the upper deck board and the lower deck board, on the side of the pallet in the four corner strut. By providing a partition rib orthogonal to each other, a hollow portion sealed to the outer corner is formed together with the side wall of the support portion, and within this hollow portion, a reinforcing rib on a diagonal line and a reinforcing rib connected to the reinforcing rib on the diagonal line are provided. Synthetic resin pallets. 8. The synthetic resin pallet according to claim 7, wherein the partition rib forming the hollow portion is connected at an approximately center portion of the support portion and formed at the same height as the support portion. The synthetic resin pallet according to claim 7 or 8, wherein the height of the reinforcing ribs on the substantially diagonal line in the hollow portion and the reinforcing ribs connected to the reinforcing ribs on the diagonal portion is lower than the partition rib forming the hollow portion.