KR100729286B1 - Pallet made of synthetic resin - Google Patents

Abstract

An object of this invention is to provide the pallet which improved the impact resistance of the 4 corner part and the intermediate support part of the synthetic resin pallet.

The configuration of the present invention is formed by the inclined surface or curved surface of the side wall facing the fork insertion port of the four corner support portion and the middle support portion extending toward the opening, and in a direction substantially perpendicular to the tangent of the inclined surface or curved surface. An inclined reinforcing rib is installed, and the inclined reinforcing rib and the orthogonal reinforcing rib installed so as to be orthogonal to the side of the pallet are integrally connected by the connecting rib parallel to the side of the pallet, and the orthogonal reinforcing rib is reinforced in the connecting portion of the deck board. Connect integrally with the rib. Further, by providing a partition rib orthogonal to the side of the pallet in the four corner support portion, a hollow portion sealed to the outer corner portion is formed together with the side wall of the support portion, in which the reinforcing rib on the diagonal line and the reinforcement on the diagonal line are formed. Install a reinforcing rib connected to the rib.

Description

PALLET MADE OF SYNTHETIC RESIN}

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

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

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 holding part

7a: opening edge of 4 corners
7b: inclined reinforcement rib in 4 corners
7c: orthogonal reinforcement rib in 4 corners

delete

7d: connecting rib in 4 corners

9: middle holding part                 

9a: middle opening edge

9b: Medium slope reinforcement rib
9c: orthogonal reinforcement rib in the middle

9d: intermediate connecting rib

10: central holding part

11: fork insertion hole
14: extension reinforcement rib

15: split surface

16: parallel reinforcement rib of the inner corner part of a 4 corner support part

17: reinforcing rib on the diagonal
17b: inclined partition rib
17c: orthogonal divider rib

17d: Parallel Partition Rib

18: Corner Orthogonal 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: transverse reinforcing ribs in the connection

33: longitudinal reinforcement rib

33a: longitudinal reinforcing ribs in the connection

35: perforation

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 holding portion in the fork insertion port of the above-described configuration are not only subjected to high loads when the cargo is placed thereon, 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, which faces from the corner portion to the center portion diagonally from the corner portion, in the inside of the support portion formed of a hollow structure, and also provides a partition wall that intersects 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 portion structure are related to each other, and the relationship between the two is important for increasing 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.

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 in substantially the same line as 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 of improving the impact resistance strength of a support | pillar part when falling and colliding 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 to the substantially 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, the Example of this invention is described in detail based on drawing. The embodiment shown in FIGS. 1-4 shows an example of a four-way insertion pallet. The four-way inserting pallet (1) is a four-corner support (7), an intermediate support (9) and a central support (10) provided between the upper deck board (3) and the lower deck board (5). It is a pallet which connects and makes the fork insertion hole 11 the space | gap enclosed by the said upper deck board 3, the lower deck board 5, and the support parts 7 and 9. The four-way inserting pallet (1) has an upper part (1A) having an upper deck board which is formed by dividing and molding into a horizontal dividing surface (15) in a substantially central portion of each strut, and a lower part having a lower deck board ( 1B) is formed by joining and welding on the divided surface 15.

A connection portion 7A to which the upper deck board 3 is connected to the four corner support 7, a connection portion 7B to which the lower deck board 5 is connected to the four corner support 7, and an upper deck board 3 9A connected to the intermediate pillar 9 and the connecting portion 9B to which the lower deck board 5 is connected to the intermediate pillar 9 are formed in the same cross-sectional shape as the respective struts to be connected. It comprises the hollow structure closed with each support part. The surface of the upper deck board 3, the surface of the lower deck board 5 in the part connected with the four corner struts 7 and the intermediate struts 9, and also the fork of the lower deck board 5. The upper surface which faces the insertion port 11 is each formed in the smooth surface, and the reinforcement rib is provided in the inner surface.

Next, the structure of this invention demonstrates the part in which the upper deck board 3 is connected with each 4 corner support part 7 and the intermediate support part 9, ie, the connection parts 7A and 9A. The upper deck board 3 is made by forming the reinforcing ribs 31 and 33 longitudinally and horizontally in the upper plate 30 and the bottom surface of this 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. Perforations 35 are provided in the upper plate 30 facing the fork insertion hole in the portion surrounded by the horizontal reinforcement ribs 31 and the vertical reinforcement ribs 33 installed vertically and horizontally to discharge foreign substances or water that enter the interior. Also good.

The opening edge 7a of the four corners and the middle opening edge 9a of the side walls facing the fork insertion holes 11 of the four corner posts 7 and 7 and the middle post 9 make the fork easy to insert. In order to extend toward the opening, it is formed in an inclined surface or a curved surface in plan view (refer FIG. 2). Further, the four corner posts 7 and the intermediate posts 9 are formed in a direction orthogonal to the tangent of the opening edge 7a of the four corners of the inclined or curved surface and the opening edge 9a of the middle. The inclined reinforcement ribs 7b of the corners and the intermediate inclined reinforcement ribs 9b are provided, and the orthogonal reinforcement ribs 7c of the four corners orthogonal to the side of a pallet, and the orthogonal orthogonal reinforcement ribs 9c are provided. . The inclined reinforcing ribs 7b of the four corners and the orthogonal reinforcing ribs 7c of the four corners are connected by the connecting ribs 7d of the four corners parallel to the side surfaces, and the middle of the inclined reinforcing ribs 7b parallel to the side. The orthogonal reinforcing ribs 9c are connected by intermediate connecting ribs 9d parallel to the sides.

The orthogonal reinforcement ribs 7c of the four corners in the four corner support portions 7 are connected portions of the horizontal reinforcement ribs 31 and the vertical reinforcement ribs 33 provided on the bottom surface of the upper deck board 3. It is integrally connected with the horizontal reinforcement rib 31a in the connection part in 7A), or the longitudinal reinforcement rib 33a in the connection part. Further, the four corner connecting ribs 7d are provided on approximately the same line as the horizontal reinforcing ribs 31 or the vertical reinforcing ribs 33, and thus the four corners of the inclined reinforcing ribs 7b and the opening edges of the four corners ( A part of 7a) is integrally connected to the horizontal reinforcing rib 31 or the vertical reinforcing rib 33 on a substantially straight line.

On the other hand, also in the intermediate | middle support part 9, it is formed similarly to the 4 corner support part 7. As shown in FIG. That is, the intermediate orthogonal reinforcement ribs 9c are integrally connected with the longitudinal reinforcement ribs 33a in the connection portions provided on the bottom surface of the upper deck board 3 in the connection portion 9A, and the intermediate connection ribs 9d. Is provided on approximately the same line as the horizontal reinforcement rib 31. Thus, the intermediate connecting ribs 9d are integrally connected in a substantially straight line with the transverse reinforcing ribs 31 via a part of the intermediate inclined reinforcing ribs 9b and the middle opening edge 9a.

The intermediate inclined reinforcing ribs 9b and 9b in the intermediate support 9 are provided on both sides of the intermediate support 9 and are symmetric about the center of the intermediate support 9. Moreover, in the four corner support part 7, the four corner inclined reinforcement ribs 7b and 7b provided in the opening edge 7a of four corners are provided so that they may oppose on substantially the same line, and are substantially symmetrical across a diagonal line. Is fulfilling.

The four corner inclined reinforcing ribs 7b, the four corners of orthogonal reinforcing ribs 7c, and the middle inclined reinforcing ribs 9b, and the middle orthogonal reinforcing ribs 9c have only a predetermined width from the support wall. The four corner connecting ribs 7d and the middle connecting ribs 9d are formed at the same height as the height of the pillar, and the four corner inclined reinforcing ribs 7b, the four corner orthogonal reinforcing ribs 7c, and The height of the deck board with part of the intermediate inclined reinforcement ribs 9b, the intermediate orthogonal reinforcement ribs 9c, ie the transverse reinforcement ribs 31a in the connection in the connections 7A, 9A and the longitudinal reinforcement ribs in the connection ( It is preferable to form at the same height as 33a). Incidentally, the four corner inclined reinforcing ribs 7b, the four corners of orthogonal reinforcing ribs 7c, the middle inclined reinforcing ribs 9b, and the middle orthogonal reinforcing ribs 9c are all four corner supports and the middle. It may be formed at the same height as the height of the support. In addition, in the same support part, for example, in FIG. 2, the inclined reinforcement ribs 7b of the four corners facing the fork insertion hole in the horizontal direction, the orthogonal reinforcement ribs 7c of the four corners and the connecting ribs 7d of the four corners, for example. ) Is formed at the same height as the height of the four corner strut portion 7, while only the four corner inclined reinforcement ribs 7b and the four corners of the orthogonal reinforcement ribs 7c facing the fork insertion holes in the up and down direction are The four corner connecting ribs 7d may be formed at the same height as the horizontal reinforcing rib 31a in the connecting portion and the vertical reinforcing rib 33a in the connecting portion.

As described above, the four corner orthogonal reinforcement ribs 7c and the middle orthogonal reinforcement ribs 9c provided in the direction orthogonal to the side surfaces of the pallet are the transverse reinforcement ribs 31 and the longitudinal reinforcement ribs 33 of the deck board. Is integrally provided with the horizontal reinforcing rib 31a in the connecting portion in the connecting portion 7A and the intermediate connecting portion 9A and the longitudinal reinforcing rib 33a in the connecting portion, and also the horizontal reinforcing rib 31a in the connecting portion and Since the longitudinal reinforcing rib 33a in the connection portion intersects in the connection portion 7A at the four corners and in the intermediate connection portion 9A, there is no fear of deformation or damage even if the fork collides in parallel with the insertion direction. Incidentally, the four corner inclined reinforcing ribs 7b and the middle inclined reinforcing ribs 9b are connected to the four corners orthogonal reinforcing ribs 7c by the four corner connecting ribs 7d and the intermediate connecting ribs 9d. Not only is it integrally connected with the orthogonal reinforcing rib 9c, but also the transverse reinforcing rib 31 and the longitudinal reinforcing rib 33 are connected via the opening edge, so that impact resistance is prevented even when the fork is inclined. Can have.

In the above embodiment, the upper deck board 3 has been described, but the lower deck board 5 can be formed in the same manner. 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 Example, 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, the Example of the reinforcement structure when a pallet falls and collides with the ground etc. is demonstrated.

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 strut 7 is provided with partition ribs 17b in a direction substantially orthogonal to the tangent of the four corner opening edges 7a of the inclined or curved surface, and orthogonal partition ribs orthogonal to the sides of the pallet. 17c is provided.

In addition, in the four corner support part 7, the inclined partition ribs 17b and 17b provided in the opening edge 7a of four corners are provided so as to oppose on substantially the same line, and are substantially symmetrical across diagonal lines. . The orthogonal partition ribs 17c and 17c are connected to an almost center portion of the four corner strut portion. The inclined partition rib 17b and the orthogonal partition rib 17c are connected by partition ribs 17d parallel to the side of the pallet.

The inclined partition ribs 17b, the orthogonal partition ribs 17c, and the parallel partition ribs 17d are formed at the same height as the four corner strut portions 7 and are welded on the divided surfaces. Therefore, the hollow part 20 sealed by the orthogonal partition ribs 17c and 17c inside the four corner support part 7, the inclined partition rib 17b, the orthogonal partition rib 17c, and the parallel partition rib 17d. The hollow part 21 is sealed by the (). Moreover, extension reinforcement ribs 14 and 14 are provided on the extension line of the said orthogonal 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 extension reinforcement ribs 14 and the parallel reinforcement ribs 16 are formed at a height equal to the height of the support portions only from a sidewall of the four corner support portions 7 and are welded on the divided surface.

In the hollow part 20 of the four corner support part 7, the diagonal reinforcement rib 17 and the corner part orthogonal reinforcement rib 18 are provided. The diagonal reinforcement ribs 17 are arranged on a diagonal line to connect the corner portions of the four corner support portions 7 and the connecting portions 19 of the orthogonal partition ribs 17c and 17c. Corner orthogonal reinforcement rib 18 is provided so as to be orthogonal to the side surface of a pallet like the orthogonal partition rib 17c, and is connected to the substantially intermediate part of the diagonal reinforcement rib 17. As shown in FIG. The diagonal reinforcing rib 17 and the corner portion orthogonal reinforcing rib 18 may be formed at the same height as the extension reinforcing rib 14 and the parallel reinforcing rib 16.

As described above, the outer corners of the four corner struts 7 have reinforcing ribs 17 on an approximately diagonal, and corner orthogonal reinforcing ribs connected to the reinforcing ribs 17 on this diagonal and orthogonal to the sides of the pallet. Since 18 is provided, there is no fear of deformation or damage even when a shock is received from the inclination direction with respect to the surface of the bottom deck board by dropping or the like as shown in FIG. Further, the impact resistance can be further increased by connecting the reinforcing ribs 17 on the diagonal lines to the connecting portions 19 of the orthogonal partition ribs 17c and 17c.

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

In the synthetic resin pallet according to the present invention, inclined reinforcing ribs are installed in the four corner struts and the intermediate struts in substantially the same direction as the impact direction of the fork, and the inclined reinforcing ribs are orthogonal reinforcing ribs in the struts provided on the deck board. Since it is connected with, the structure is excellent in impact resistance so that the fork does not easily deform or break even when colliding. In addition, the connection reinforcing rib connecting the inclined reinforcing rib to the orthogonal reinforcing rib is provided on the almost same line as the reinforcing rib of the deck board, so that the strength can be increased without being thick, which is advantageous in terms of molding without increasing the weight of the pallet itself. .

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 at the outer corner portion of the four corner support portion, and in this hollow portion, a substantially diagonal reinforcement. A rib and a corner portion orthogonal reinforcement rib connected to this diagonal reinforcement rib 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 which connects the upper deck board and the lower deck board to the hollow struts, and the pores enclosed by these struts and the upper deck board and the lower deck board as the fork inserts, An opening edge of the side walls of the four corner struts and the intermediate strut facing the fork insertion hole is formed as an inclined surface or a curved surface that extends toward the opening, and in each of the struts is substantially perpendicular to the tangent of the inclined surface or the curved surface. Inclined reinforcement ribs in a direction, and the inclined reinforcement ribs and orthogonal reinforcement ribs installed so as to be orthogonal to the sides of the pallet are integrally connected by connecting ribs parallel to the sides of the pallet, and the connecting ribs are installed on the deck board. A pallet made of resin, which is formed by being installed on substantially the same line as one reinforcing rib, and the orthogonal reinforcing rib is integrally connected with the reinforcing rib of the deck board in the support portion. 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 center 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 an intermediate support part, is provided symmetrically about the center part of the support part, and the said four corner support part is given. A synthetic resin pallet characterized by having inclined reinforcing ribs facing each other on the same line. In the synthetic resin pallet which connects the upper deck board and the lower deck board to a hollow structure, and the pores enclosed by these support portions, the upper deck board, and the lower deck board as fork inlets, In the four corner struts, a partition rib orthogonal to the side of the pallet is provided to form a hollow portion sealed to the outer corner with the side wall of the strut, and in this hollow portion a roughly diagonal reinforcement rib and a diagonal reinforcement rib. Synthetic resin pallet, characterized in that to install a reinforcing rib connected. 8. The synthetic resin pallet according to claim 7, wherein the partition rib forming the hollow portion is connected to an approximately central 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.

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