JP2000255571A - Structure for connecting end beam or middle beam with deck board of pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal pallet easily and inexpensively manufactured by making the welding spots of a beam and a pallet as few as possible. SOLUTION: An inside enlarging groove 41 is formed extended all the way on the back of a top face deck board 4. The side face 42 of the top face deck board 4 is so formed that the facing side faces 42 of neighboring top face deck boards 4 form between them a gap whose cross section is smaller at the top and bottom edges than at the height center part of the side faces. On the part corresponding the inside enlarging groove 41 of each top face deck board 4 of the top stage part 21 of an end beam 2, a vertical groove insertion part 22 for being inserted in the groove 41 is formed. On the part corresponding the gap between neighboring top face deck boards 4 of the top stage part 21, a vertical gap inserting part 23 for being inserted in the gap is formed. The groove insertion part 22 and the gap insertion part 23 of the end beam 2 are inserted in the inside enlarging groove 41 of the top face deck board 4 and in the gap between the neighboring top face deck boards 4 from right and left.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a metal pallet.

[0002]

2. Description of the Related Art Conventionally, a pair of left and right metal end girders provided with steps at upper and lower inner corners, a metal middle girder disposed between both end girders, and a step portion and a middle girder of both end girders. There has been a pallet which is provided with a plurality of front and rear parallel metal deck boards provided at predetermined intervals on the upper and lower surfaces thereof, and each of the girders and the deck board are joined by welding at several places.

[0003]

In the case of the above pallet,
Since the number of welding points is extremely large, the manufacturing cost is high. In addition, since the welded portion is narrow and has many portions, it is difficult to perform automatic welding, and considerable time and effort is required for manufacturing.

[0004] It is an object of the present invention to provide a metal pallet which is easy to manufacture and inexpensive by minimizing the number of welding points between the beam and the pallet.

[0005]

The invention according to claim 1 is
A pair of left and right metal end girders provided with steps at the upper inner corner or upper and lower inner corners, and a plurality of front-back parallel metal deck boards provided at predetermined intervals on the steps of both end girders. And a connection structure between the end girders and one or both of the upper deck board and the upper and lower deck boards in the pallet, wherein at least one extending over the entire back surface of the deck board.
Two internal enlarged grooves are formed, and the cross section shape is such that the gap between the opposing side surfaces of adjacent deck boards is narrower than the other part at the side edge of the deck board back side or the middle part of the height on the same side. The side surface has a vertical groove fitting portion which can be fitted into the groove in a portion corresponding to the internal enlarged groove of each deck board in the step portion, and a portion corresponding to a gap between adjacent deck boards in the step portion A vertical gap fitting portion that can be fitted in the gap is formed, and the groove fitting portion and the gap fitting portion of the end girders are respectively fitted into the internal enlarged groove of the deck board and the gap between the adjacent deck boards from the left and right directions. Is what it is.

According to a second aspect of the present invention, there is provided a pair of left and right metal end girders provided with a step at an upper inner corner or upper and lower inner corners, and a plurality of end girders provided at predetermined intervals on the step of the both end girders. A connection structure between an end girder and one or both of an upper deck board and an upper and lower deck board in a pallet including front and rear parallel metal deck boards, and at least one internal expansion extending over the entire back surface of the deck board. A groove is formed, and a vertical groove fitting portion that can be fitted into the groove is formed in a portion corresponding to the internal expansion groove of each deck board in the step portion, and the groove fitting portion of the end girder is horizontally inserted into the internal expansion groove of the deck board. It is fitted in from.

According to a third aspect of the present invention, there is provided a pair of left and right metal end girders having a step at an upper inner corner or upper and lower inner corners, and a plurality of end girders provided at predetermined intervals on the step of the both end girders. A connection structure between the end girders and one or both of the upper deck board and the upper and lower deck boards in a pallet including front and rear parallel metal deck boards, and a gap between opposing side faces of adjacent deck boards is the same. The opposite side surface has a cross-sectional shape that is narrower than the other portion at the side edge portion of the deck board rear surface or the middle portion of the height on the side surface, and the front side surface of the front end deck board and the rear side of the rear end deck board. The side surface has a cross-sectional shape such that the edge of the back side of the deck board or the middle portion of the height on the side surface is located outside the other portion in the front-rear direction, and extends over the entire length of the step and each deck. Vertical wall portion having a cutout portion that may fit the board is formed, in which the ends of the deck boards are fitted from the left and right direction in the notch of the vertical wall portion.

According to a fourth aspect of the present invention, there is provided a pair of left and right metal end girders provided with a step at an upper inner corner or upper and lower inner corners, and a metal middle girder disposed between both end girders. One of the middle girder and the upper deck board or the upper and lower deck boards in a pallet comprising a plurality of front-back parallel metal deck boards provided at predetermined intervals on the upper and lower surfaces of the step portions of both end girders and the middle girder Or a connection structure with both, wherein at least one internal enlarged groove extending over the entire length is formed on the back surface of the deck board, and a gap between opposing side surfaces of adjacent deck boards is formed at a side edge or a height of the deck board back surface on the same side surface. In the middle portion, the side surface has a cross-sectional shape that is narrower than the other portions, and a portion corresponding to the internal enlarged groove of each deck board on the upper surface or upper and lower surfaces of the middle girder. A vertical groove fitting portion that can be fitted in the groove is formed, and a vertical gap fitting portion that can be fitted in the gap is formed in a portion corresponding to a gap between all adjacent deck boards on the upper surface or upper and lower surfaces of the middle girder. In addition, the groove fitting portion and the gap fitting portion of the middle girder are fitted into the internal enlarged groove of the deck board and the gap between the adjacent deck boards from the left and right directions, respectively.

According to a fifth aspect of the present invention, there is provided a pair of left and right metal end girders having a step at an upper inner corner or upper and lower inner corners, and a metal middle girder disposed between both end girders. One of the middle girder and the upper deck board or the upper and lower deck boards in a pallet comprising a plurality of front-back parallel metal deck boards provided at predetermined intervals on the upper and lower surfaces of the step portions of both end girders and the middle girder Or a connection structure with both, wherein at least one internal expansion groove extending over the entire length is formed on the back surface of the deck board, and the groove is formed at a portion corresponding to the internal expansion groove of each deck board on the upper surface or upper and lower surfaces of the middle girder. The groove insertion portion of the middle girder is formed to be inserted into the internal enlarged groove of the deck board from the left and right directions.

According to a sixth aspect of the present invention, there is provided a pair of left and right metal end girders provided with a stepped portion at an upper inner corner or upper and lower inner corners, and a metal middle girder disposed between both end girders. And a middle girder and a top deck board or a top and bottom deck board in a pallet comprising: a plurality of front-back parallel metal deck boards which are provided at predetermined intervals on the upper and lower surfaces of the step portions of the both-end girder and the middle girder. And the gap between the opposing side surfaces of the adjacent deck boards is narrower than the other portion at the deck board back side edge or the middle part of the height on the opposing side surface. The opposite side surface has the same cross-sectional shape, and the front side surface of the front end deck board and the rear side surface of the deck board on the rear side surface of the rear end deck board or the middle portion of the height are more outward in the front-rear direction than other portions. The side surface has a cross-sectional shape such that it is located, a vertical wall portion extending over the entire length and having a cutout portion capable of fitting each deck board is formed on the upper surface or upper and lower surfaces of the middle girder, and the cutout portion of the vertical wall portion is formed. The middle part of the length of the deck board is fitted from the left-right direction.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 8 show a first embodiment of the present invention.

As shown in FIGS. 1 to 8, a pallet (1) to which the present invention is applied has a pair of left and right aluminum alloy extruded end girders (steps (21) provided at upper and lower inner corners). 2), the end girders (2), an aluminum alloy extruded middle girder (3) placed between them, and the upper step (21) and the middle girder of the end girders (2)
(3) seven front and rear parallel aluminum alloy extruded upper surface deck boards (4) which are provided at predetermined intervals on the upper surface of (3),
Upper and lower decks (5) made of aluminum alloy extruded profiles in front and rear parallel arrangement provided at predetermined intervals on the lower step (21) of both end girders (2) and the lower surface of the middle girder (3). Become.

At the center of the rear surface width of the upper deck board (4),
One internal enlarged groove (41) is formed which extends over the entire length. Opposite sides (42) of adjacent top deck boards (4)
The side surface (42) has a substantially horizontal V-groove cross-sectional shape such that the gap between them is narrower at the upper and lower edges of the side surface (42) than at the intermediate height. Upper step of end girder (2)
Internal expansion groove (41) of each upper deck board (4) in (21)
A vertical groove fitting portion (22) that can be fitted into the groove is formed in a portion corresponding to the upper surface deck board (4) in the upper step portion (21). A vertical gap fitting portion (23) is formed. Also, middle digit
A vertical groove fitting portion (31) that can be fitted in the groove (41) is formed at a portion corresponding to the internal enlarged groove (41) of each upper deck board (4) on the upper surface of (3), and is adjacent to the upper surface of the upper surface. The upper deck board (4) has a vertical gap fitting portion (32) formed at a portion corresponding to the gap between the vertical deck boards (4). Then, the groove fitting portions (22) and (31) and the gap fitting portions (23) and (32) of the end girders (2) and the middle girder (3) respectively correspond to the internal enlarged groove (41) of the upper deck board (4) and the adjacent groove. The upper deck board (4) is fitted into the gap between the mating upper deck boards from the left and right.

Opposite sides of adjacent lower deck boards (5)
(51) The opposing side surface (51) has a substantially laterally convex V-shaped cross-sectional shape such that the gap between them is narrower than the upper and lower edge portions at the intermediate height in the opposing side surface (51), The height of the front side (51) of the lower deck board (5) at the front end and the rear side (51) of the lower deck board (5) at the rear end are substantially such that the middle part of the height is located outside the upper and lower edges in the front-rear direction. The side surface (51) has a laterally convex V-shaped cross section. Lower part of end girder
(21), extending over the entire length and each lower deck board
A vertical wall (24) having a notch (25) into which (5) can be fitted is formed. A notch (34) that extends over the entire length of the middle girder (3) and can fit each lower deck board (5)
Is formed. And end girders
Lower deck board in notch (25) of vertical wall (24) of (2)
The end of the lower deck board (5) is inserted into the notch (34) of the vertical wall (33) of the middle girder (3) with the center of the length of the lower deck board (5) in the horizontal direction. It is fitted from.

The end girders (2) are hollow with a substantially rectangular cross section and have a horizontal partition (26) at an intermediate height.
The middle girder (3) is also hollow with a substantially rectangular cross section. Both outer portions of the inner enlarged groove (41) in the upper deck board (4) are hollow. On the upper surface of the upper deck board (4), a plurality of non-slip ridges (4
3) are formed at predetermined intervals. Lower deck board
(5) is a hollow hexagonal cross section substantially flat,
A vertical partition (52) is provided at both edges and in the center of the width. The opening at both ends of the end girder (2) and the opening at both ends of the middle girder (3)
Each is closed by a cap (6) (7).

In the pallet (1), the end girders
(2) and middle girder (3) and top and bottom deck board (4)
The connection structure of the present invention is applied to the connection with (5), and the connection strength of these members (2) (3) (4) (5) alone can be secured to a considerable extent by itself. Thus, the number of welding points can be greatly reduced as follows. That is,
As shown in Fig. 6, each end girder (2) and top deck board (4)
Means that only the adjacent edges on these upper surfaces are welded to each other. As shown in FIG. 7, the end girders (2) and the lower deck board (5) are welded only at adjacent edges on their lower surfaces. The middle girder (3) and the upper and lower deck boards (4) and (5) are not welded at all. In addition, since the welding locations are aligned in a straight line, automatic welding can be performed.

FIGS. 9 and 10 show a second embodiment of the present invention.

This embodiment is the same as the first embodiment except for the following. That is, as shown in FIGS. 9 and 10, the pallet (12) to which the present invention is applied does not have the groove fitting portion and the gap fitting portion formed on the upper surface of the middle spar (30). ) No vertical wall is formed on the lower surface. Therefore, in the pallet (12), the middle girder (30) and the upper and lower deck boards (4) and (5) are joined by welding at several places.

FIG. 11 and FIG. 12 show a third embodiment of the present invention.

This embodiment is the same as the second embodiment except for the following points. That is, as shown in FIGS. 11 and 12, the pallet (13) to which the present invention is applied does not have a lower deck board at all, and its end girders (20) are stepped only in the upper inner corner. (21).

[0022]

According to the connection structure between the end girder or middle girder and the deck board in the pallet of the present invention, as described above, the connection strength between the girder and the deck board can be secured to a considerable extent by itself. As a result, the number of welding points between the end girders and the deck board can be greatly reduced as compared with the conventional technique, and automatic welding can be achieved, so that a pallet which is easy to manufacture and inexpensive can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a pallet showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing in detail a connecting portion between an end girder and a deck board in the pallet of the first embodiment.

FIG. 3 is a perspective view showing in detail a connecting portion between a middle girder and a deck board in the pallet of the first embodiment.

FIG. 4 is a vertical cross-sectional view of the pallet of the first embodiment.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

6 is a sectional view taken along the line VI-VI of FIG.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is an overall perspective view of a pallet showing a second embodiment of the present invention.

FIG. 10 is a vertical cross-sectional view of a pallet according to a second embodiment.

FIG. 11 is an overall perspective view of a pallet according to a third embodiment of the present invention.

FIG. 12 is a vertical cross-sectional view of a pallet according to a third embodiment.

[Explanation of symbols]

 1) Pallet 12) Pallet 13) Pallet 2) End girder 21) Step 22) Groove fitting 23) Gap fitting 24) Vertical wall 25) Notch 3) Middle girder 31) Groove fitting 32) Gap fitting 33) Vertical wall 34) Notch 4) Upper deck board 41) Internal enlarged groove 42) Opposite side 5) Lower deck board 51) Opposite side 51) Rear side 51) Front side

Claims (6)

[Claims] 1. A pair of left and right metal end girders provided with steps at upper inner corners or upper and lower inner corners, and a plurality of front-back parallel metal decks provided at predetermined intervals on the step parts of both end girders. A connection structure between an end girder and one or both of an upper deck board and an upper and lower deck board in a pallet including a board, wherein at least one internal enlarged groove extending over the entire length is formed on the back surface of the deck board. The side surface has a cross-sectional shape such that the gap between the opposing side surfaces of the mating deck board is narrower than the other portion at the deck board back side edge or the middle part of the height on the same side, A vertical groove fitting portion that can be fitted in the groove is formed in a portion corresponding to the internal enlarged groove of each deck board, and the same gap is formed in a portion corresponding to a gap between adjacent deck boards in the step portion A pallet in which a vertical gap fitting portion that can be fitted is formed, and the groove fitting portion and the gap fitting portion of the end girders are fitted into the internal enlarged groove of the deck board and the gap between the adjacent deck boards from the left and right directions, respectively. Connection structure between end girders and deck board. 2. A pair of left and right metal end girders provided with steps at the upper inner corner or upper and lower inner corners, and a plurality of front-rear parallel metal decks provided at predetermined intervals on the steps of both end girders. A connection structure between the end girders and one or both of the upper deck board and the upper and lower deck boards in a pallet including a board, wherein at least one internal expansion groove extending over the entire length is formed on the back surface of the deck board; A vertical groove fitting portion that can be fitted in the groove is formed in a portion corresponding to the internal enlarged groove of each deck board in the portion, and the groove fitting portion of the end spar is fitted into the internal enlarged groove of the deck board from the left and right direction. , The connection structure between the end girders and the deck board in the pallet. 3. A pair of left and right metal end girders provided with steps at the upper inner corner or upper and lower inner corners, and a plurality of front-back parallel metal decks provided at predetermined intervals on the step parts of both end girders. A connection structure between the end girders and one or both of the upper deck board and the upper and lower deck boards of a pallet including a board, wherein a gap between opposing side faces of adjacent deck boards is a back side of the deck board in the opposing side faces. The opposite side has a cross-sectional shape that is narrower than the other part at the edge or the middle part of the height, and the back side of the deck board on the front side of the front end deck board and the rear side of the rear end deck board The side surface has a cross-sectional shape such that the edge or the intermediate portion of the height is located outside the other portion in the front-rear direction,
An end girder on a pallet in which a vertical wall having a notch extending over the entire length and capable of fitting each deck board is formed in the step portion, and an end of the deck board is fitted into the notch of the vertical wall from the left-right direction. Connection structure with deck board. 4. A pair of left and right metal end girders provided with a step at an upper inner corner or upper and lower inner corners, a metal middle girder disposed between both end girders, and a step of the both end girders. A connection structure between the middle girder and one or both of the upper deck board and the upper and lower deck boards in a pallet including a plurality of front and rear parallel metal deck boards provided at predetermined intervals on the upper or upper and lower surfaces of the middle girder. Wherein at least one internal enlarged groove extending over the entire length is formed on the back surface of the deck board, and a gap between the opposing side surfaces of the adjacent deck boards is other than at a side edge portion of the deck board back surface or an intermediate height portion on the same side surface. The side surface has a cross-sectional shape that is narrower than that of the part, and the vertical part that can be fitted in the part corresponding to the internal enlarged groove of each deck board on the upper surface or the upper and lower surfaces of the middle girder A groove fitting portion is formed, and a vertical gap fitting portion that can be fitted into the gap is formed at a portion corresponding to a gap between all adjacent deck boards on the upper surface or upper and lower surfaces of the middle girder, and a groove fitting of the middle girder is formed. A connection structure between a middle girder and a deck board in a pallet, in which a portion and a gap fitting portion are respectively fitted into an inner enlarged groove of the deck board and a gap between adjacent deck boards from the left and right directions. 5. A pair of left and right metal end girders having a step at an upper inner corner or upper and lower inner corners, a metal middle girder disposed between both end girders, and a step of the both end girders. A connection structure between the middle girder and one or both of the upper deck board and the upper and lower deck boards in a pallet including a plurality of front and rear parallel metal deck boards provided at predetermined intervals on the upper or upper and lower surfaces of the middle girder. Wherein at least one internal enlarged groove extending over the entire length is formed on the back surface of the deck board, and a vertical groove that can be fitted into the groove at a portion corresponding to the internal enlarged groove of each deck board on the upper surface or upper and lower surfaces of the middle girder. A connection structure between a middle girder and a deck board in a pallet, in which a fitting portion is formed, and a groove fitting portion of the middle girder is fitted into the internal enlarged groove of the deck board from the left and right directions. 6. A pair of left and right metal end girders having a step at an upper inner corner or upper and lower inner corners, a metal middle girder disposed between both end girders, and a step part of the both end girders. A connection structure between the middle girder and one or both of the upper deck board and the upper and lower deck boards in a pallet including a plurality of front and rear parallel metal deck boards provided at predetermined intervals on the upper or upper and lower surfaces of the middle girder. The cross-sectional shape is such that the gap between the opposing side surfaces of adjacent deck boards is narrower than the other portion at the edge side of the deck board back surface or the middle part of the height on the opposing side surface. Has a cross-sectional shape such that the front edge of the front deck board and the rear edge of the deck board on the rear side of the rear deck board or the middle portion of the height of the deck board are located outside the other portions in the front-rear direction. Has the same side,
A vertical wall portion is formed on the upper surface or upper and lower surfaces of the middle girder so as to extend over the entire length and has a cutout portion into which each deck board can be fitted, and an intermediate length of the deck board is fitted into the cutout portion of the vertical wall portion from the left and right directions. The connection structure between the middle girder and deck board in the pallet.