JP2022074436A - Support frame for stacking conveying pallets - Google Patents

Abstract

To provide a support frame for size versatile stacking.SOLUTION: A support frame 100 allows a conveying pallet 200, including fork pockets 250, to be stacked with a load thereon. The support frame has four post units 110 that are detachably erected at four corners of the conveying pallet. Each post unit includes: a pillar part 110a which configures a body of the post unit; a leg part 115 at a lower end of the pillar part that can be inserted into and secured to the fork pocket 250; a receiving bracket 150 at an upper end of the pillar part that can support the four corners of the conveying pallet of an upper stage; and a first connecting horizontal member 111 and a second connecting horizontal member 131 extending from an upper end side surface of the pillar part toward the other two pillar parts facing in a side direction of the conveying pallet. Tips of the first connecting horizontal member and tips of the second connecting horizontal member can be connected by first locking members (locking pins 112, 135), respectively, in a relative sliding overlapping manner.SELECTED DRAWING: Figure 1

Description

The present invention relates to a support frame for stacking transport pallets.

As in Patent Documents 1 and 2, a plurality of stacking support frames that enable stacking with a load placed on a transport pallet are known. In the conventional support frame, all four sides of the transport pallet are generally surrounded by a grid-like frame.

Japanese Unexamined Patent Publication No. 9-2472 Japanese Patent Application Laid-Open No. 2015-209218

When all four sides of the transport pallet are surrounded by a grid-like frame like a conventional support frame, it is difficult to give size versatility to the size change of the transport pallet to which the support frame is mounted. Therefore, if the size of the transportation pallet changes, it becomes impossible to attach the support frame. Therefore, it is necessary to prepare a plurality of types of support frames corresponding to a plurality of sizes of transport pallets, which has been an obstacle to cost reduction of the support frames.

Therefore, an object of the present invention is to provide a support frame for stacking with versatility in size.

In order to solve the above problems, the stacking support frame of the present invention supports a transport pallet having a pair of left and right fork pockets on opposite sides to enable stacking with a load placed on the pallet. The support frame is a frame, and the support frame has four pillar units that are detachably erected at the four corners of the transport pallet, and each pillar unit has a pillar portion constituting the main body of the pillar unit and the pillar. A leg portion at the lower end of the portion that can be inserted and fixed into the fork pocket, a receiving metal fitting at the upper end of the pillar portion that can support the four corners of the upper transport pallet, and a side surface of the upper end portion of the pillar portion. It has a first connecting cross member and a second connecting cross member extending toward the other two pillars facing each other in the side direction of the transport pallet, and the tips of the first connecting cross members are connected to each other. The tip portions of the second connecting cross members are vertically slidably overlapped with each other and can be connected by the first locking member.

According to the present invention, it is possible to realize a support frame having versatility in size.

It is a perspective view of the state which the support frame for stacking which concerns on one Embodiment of this invention is attached to the transport pallet. It is an upper enlarged perspective view of a support frame. (A) is an exploded perspective view of a support frame mounted on a square transport pallet, and (b) is an exploded perspective view of a support frame mounted on a rectangular transport pallet. It is a perspective view which shows the state which the support frame is attached to each of (a) square and (b) rectangular transport pallets. It is a perspective view which shows the state in which the square transport pallets are stacked in two layers using a support frame. It is a perspective view which shows the state which the rectangular transport pallets are stacked in two layers using a support frame. It is (a) perspective view and (b) the sectional view seen from the B direction of the leg part provided with the retaining claw part.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. By assigning the same reference numerals to the same or corresponding parts throughout the drawings, duplicate explanations will be omitted as appropriate.

(Overall configuration of support frame for stacking)
FIG. 1 is a perspective view showing a state in which a stacking support frame 100 according to an embodiment of the present invention is attached to a transport pallet 200 from which a load has been removed. The transport pallet 200 is a rectangular plate-shaped resin molded product, and has a two-layer structure of an upper layer portion 210 and a lower layer portion 220.

The transport pallet 200 has different vertical and horizontal sizes depending on the product number, and may be square or rectangular. The conventional support frame has no size versatility, but the support frame 100 according to the present invention has size versatility.

In the transport pallet 200, the upper layer 210 and the lower layer 220 are mesh-shaped for weight reduction. Between the upper layer portion 210 and the lower layer portion 220, the corner portions 230 at the four corners and the intermediate portion 240 located at the center of each side are arranged.

A predetermined space is maintained between the upper layer portion 210 and the lower layer portion 220 by the corner portion 230 and the intermediate portion 240. A pair of left and right fork pockets 250 for inserting a pair of left and right forks of the forklift are formed between the left and right corner portions 230 and the intermediate portion 240. The fork pocket 350 is a four-way insertion type and is formed on the four sides of the transport pallet 300.

The support frame 100 has four support column units 110. By interconnecting the four support column units 110 in the horizontal direction, an integrated support frame 100 is configured.

As will be described later, these strut units 110 are connected in pairs by a first connecting cross member 111 and a third connecting cross member 113, and then are detachably erected at the four corners of the transport pallet 200. The two support column units 110 arranged diagonally in the transport pallet 200 have the same shape, and the two support column units 110 arranged left and right in the side direction of the transport pallet 200 have a symmetrical shape.

Each pillar unit 110 has a pillar portion 110a constituting the main body of the pillar unit 110. At the lower end of the pillar 110a, a leg 115 that can be inserted and fixed horizontally into the fork pocket 250 is attached at a substantially right angle.

The leg portion 115 is formed by bending a rectangular sheet metal into a U-shaped cross section, and is composed of an upper plate portion 115a, a lower plate portion 115b, and a connecting plate portion 115c. The upper plate portion 115a is screwed or welded to the lower surface of the third connecting cross member 113, and the connecting plate portion 115c is screwed or welded to the lower end side surface of the support column unit 110, respectively. Further, the connecting plate portion 115c abuts on the inner surface (side surface of the corner portion 230) of the fork pocket 350.

On the other hand, as shown in FIGS. 2 and 4, a receiving metal fitting 150 capable of supporting the four corners of the upper transport pallet 200 is attached to the upper end of the pillar portion 110a. Further, the first connecting cross member 111 extends horizontally from one side surface of the upper end portion of the pillar portion 110a toward the other pillar portion 110a facing the transport pallet 200 in the side direction (left-right direction in FIG. 1). There is. Then, as shown in FIG. 2, the tips of the first connecting cross members 111 of the left and right strut units 110 can be connected to each other by the lock pin 112 as the first locking member in a state where they are slidably overlapped with each other. ing.

The lock pin 112 has a ball radially outwardly urged by a spring at its tip. After the ball passes through the insertion hole (lock hole) of the lock pin 112, the ball protrudes toward the outer diameter side to prevent the lock pin 112 from being pulled out.

Specifically, an insertion shaft having a plurality of lock holes at equal intervals in the longitudinal direction is fixed to the tip of one of the first connecting cross members 111 (see FIG. 3A (b)). After this insertion shaft is nested and relatively slidably inserted into the tip of the other first connecting cross member 111, the lock pin 112 of the other first connecting cross member 111 is inserted into a predetermined lock hole. By inserting it, the tip portions of the first connecting cross member 111 are connected to each other.

Similarly, the third connecting cross member 113 extends horizontally from one side surface of the lower end portion of the pillar portion 110a toward the other pillar portion 110a facing the transport pallet 200 in the side direction (left-right direction in FIG. 1). ing. Then, as shown in FIG. 2, the tips of the third connecting cross members 113 of the left and right strut units 110 can be connected to each other by the lock pin 114 as the second locking member in a state where they are overlapped so as to be relatively slidable. ing.

An L-shaped frame 130 is detachably attached to the upper end of the pillar portion 110a. The receiving metal fitting 150 is integrally formed at a corner portion of the L-shaped frame 130. As shown in FIG. 2, the L-shaped frame 130 has a second connecting cross member 131 extending in the horizontal direction and a connecting vertical member 132 extending vertically downward.

The second connecting cross member 131 is arranged at a position higher than the above-mentioned first connecting cross member 111, and faces the other pillar portion 110a from the receiving metal fitting 150 in the side direction (front-back direction in FIG. 2) of the transport pallet 200. It extends horizontally toward the receiving metal fitting 150. The tip portions of the second connecting cross member 131 can be connected to each other by another lock pin 135 as the first locking member in a state where they are slidably overlapped with each other. By arranging the second connecting cross member 131 at a high position as described above, it is possible to put the load W sideways and sideways as shown in FIGS. 4 and 5.

The connecting vertical member 132 has an insertion shaft 132a extending downward as shown in FIGS. 3A (a) and 3A (b). The insertion shaft 132a is detachably inserted and connected to the upper end portion of the pillar portion 110a from the vertical direction.

(Installation of support frame 100)
The support frame 100 is configured as described above, and the support frame 100 is mounted horizontally on the transport pallet 200 as shown by the arrows in FIGS. 3B (a) and 3B (b). 3B (a) is a square transport pallet 200, and (b) is a rectangular transport pallet 300. Prior to mounting FIG. 3B, a pair of left and right strut units 110 are first connected in pairs by a first connecting cross member 111 and a third connecting cross member 113.

That is, the tip portions of the first connecting cross member 111 facing each other in the side direction of the transport pallet 200 (300) and the tip portions of the third connecting cross member 113 are inserted in a nested manner. Then, the tip portions are connected to each other by the lock pins 112 and 114 at predetermined positions corresponding to the size of the transport pallet 200 (300). By connecting the support column units 110 in pairs in this way, a rectangular frame structure arranged on one surface of the transport pallet 200 (300) can be formed.

The height of the third connecting cross member 113 is the same as the height of the upper surface of the upper layer portion 210 of the transport pallet 200 (300). Further, the inner surface of the third connecting cross member 113 abuts on the outer surface of the transport pallet 200 (300). Therefore, in the stacked state of FIGS. 4 and 5, the third connecting cross member 113 does not interfere with the load W.

The leg portion 115 at the lower end of the rectangular frame structure in which the support column units 110 are paired is inserted into the fork pocket 250 of the transport pallet 200 (300) and fixed. The vertical height of the leg portion 115 is set corresponding to the vertical height of the fork pocket 250.

As a result, once the leg portion 115 is strongly inserted into the fork pocket 250, the leg portion 115 is firmly fixed to the fork pocket 250 to the extent that the leg portion 115 cannot be easily pulled out. By providing a loose downward taper or upward taper on the upper surface or the lower surface of the leg portion 115, the fixing of the leg portion 115 to the fork pocket 250 can be further strengthened. Further, as will be described later in FIG. 6, by providing the retaining claw portion 115d on the lower surface of the leg portion 115, the fixing (removing) of the leg portion 115 to the fork pocket 250 can be ensured.

After fixing the leg portion 115 to the fork pocket 250 and erecting the support column unit 110, the L-shaped frame 130 is connected to the upper end portion of the column portion 110a. That is, the insertion shaft 132a at the lower end of the connecting vertical member 132 of the L-shaped frame 130 is inserted and connected from the direction perpendicular to the upper end of the pillar portion 110a. If the transport pallets 200 are stacked on the upper stage, this connecting portion may not come off upward even without screwing, but may be screwed or fixed with a lock pin as necessary.

Finally, the tips of the second connecting cross members 131 of the L-shaped frame 130 are nestedly overlapped with each other so as to be relatively slidable as shown in FIG. 2, and are connected by the lock pin 135. The connecting position of the lock pin 135 is a predetermined position corresponding to the size of the transport pallet 200. Since the size of the transport pallet 200 usually varies slightly, it is preferable to finely adjust the connection positions of the lock pins 112, 113, and 135 with the support frame 100 attached at the site.

3B (a) and 3B (b) show an empty transport pallet 200, but in reality, as shown in FIGS. 4 and 5, the lower transport pallet 200 is loaded with the cargo W on the lower transport pallet 200 (300). The support frame 100 is attached to (300). After that, the upper transport pallet 200 (300) having the load W is stacked on the receiving metal fittings 150 at the upper four corners of the support frame 100.

The receiving metal fitting 150 has a horizontal rectangular plate-shaped support surface 151 and an L-shaped positioning plate portion 152 that stands up from two orthogonal sides on the outer side of the support surface 151. Then, the lower surfaces of the corner portions 230 at the four corners of the upper transport pallet 200 are supported by the support surface 151. Further, the two orthogonal outer surfaces of the corner portion 230 come into contact with the positioning plate portion 152, and the lateral displacement of the upper transport pallet 200 (300) is prevented.

The support frame 100 according to the embodiment of the present invention has size versatility that can be handled by the same support frame 100 even if the size of the transport pallet 200 (300) changes. It is assumed that the size of the stacked transportation pallets 200 as shown in FIG. 4 is, for example, a square of 1100 mm × 1100 mm, and the size of the stacked transportation pallets 300 as shown in FIG. 5 is a rectangle of, for example, 1200 mm × 1100 mm. In this case, the connecting positions of the upper and lower lock pins 112 and 114 on the front side are extended by 100 mm, respectively.

3A (b) and 3B (b) show the mounting of the support frame 100 on such a rectangular transport pallet 300. Like the square transport pallet 200, the rectangular transport pallet 300 also has a corner portion 330, an intermediate portion 340, and a fork pocket 350. The fork pocket 350 is a two-way insertion type, and is formed on two opposite sides of the transport pallet 300.

Further, FIGS. 4 and 5 show a state in which the transport pallets 200 and 300 are stacked in two stages, but the transport pallets 200 and 300 can be stacked in three or more stages. Further, in the stacked state of FIGS. 4 and 5, in the horizontal direction indicated by the arrow, there is no connecting cross member for connecting the lower ends of the column units 110 to each other, so that the load W in the lower stage can be taken in and out in the direction of the arrow. It is possible.

On the other hand, the conventional transport pallet is a type in which all four sides are surrounded by a grid-shaped support frame, so it is difficult to load and unload cargo from the side of the pallet. If an opening / closing door is provided in a part of the grid-like frame, it is possible to load and unload cargo from there, but this complicates the structure of the support frame, which causes problems of increasing the number of parts and cost. In the present embodiment, since the support frame 100 is open in two directions, the load W can be taken in and out in the direction of the arrow.

(Claws for retaining legs)
6 (a) and 6 (b) are examples in which the retaining claw portion 115d is provided on the leg portion 115 described above, and FIG. 6 (b) is a cross-sectional view taken from the perspective view of FIG. 6 (a) as viewed from the direction of arrow B. Is. That is, a retaining claw portion 115d is provided on the edge of the lower plate portion 115b of the leg portion 115, the leg portion 115 is inserted into the fork pocket 250, and then the retaining claw portion 115d is bent vertically downward.

Then, the lower end portion of the bent claw portion 115d is engaged with the mesh hole 220a of the lower layer portion 220 of the transport pallet 200 as shown in FIG. 6B. This prevents the legs 115 from coming out of the fork pocket 250.

A similar retaining claw portion may be provided on the upper plate portion 115a of the leg portion 115, and the claw portion may be bent vertically upward to engage with the mesh hole of the upper layer portion 210 of the transport pallet 200. The retaining claw portion 115d of the upper plate portion 115a and the lower plate portion 115b is used not only for retaining the leg portion 115 but also for preventing the pair of left and right support column units 110 from approaching depending on the engagement position with respect to the mesh hole. Is also possible.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be modified in various ways. For example, in the above embodiment, each strut unit 110 is laterally connected by three connecting cross members 111, a second connecting cross member 131, and a third connecting cross member 113, but the third connecting cross member is connected. The cross member 113 can be omitted. That is, when the leg portion 115 is firmly fixed to the fork pocket 250 by using the retaining claw portion 115d or the like as described above, the third connecting lateral member under the first connecting cross member 111 The material 113 can be omitted if it is not always necessary in terms of strength.

Further, in the above embodiment, the L-shaped frame 130 is separated from the pillar portion 110a and inserted into the pillar portion 110a to be integrated to be integrated, but this is compactly stored when the pillar unit 110 is disassembled. To do. Therefore, if there is enough storage space, it is possible to integrally configure the support column unit 110 including the L-shaped frame 130.

100: Support frame for stacking 110: Pillar unit 110a: Pillar portion 111: First connecting cross member 112, 135: Lock pin (first lock member)
114: Lock pin (second lock member)
113: Third connecting cross member 115: Leg portion 115a: Upper plate portion 115b: Lower plate portion 115c: Connecting plate portion 115d: Retaining claw portion 130: L-shaped frame 131: Second connecting cross member 132: Connecting Vertical member 132a: Insertion shaft 135: First lock member 150: Receiving metal fitting 151: Support surface 152: Positioning plate portion 200, 300: Transport pallet 200, 300: Transport pallet 210: Upper layer portion 220: Lower layer portion 220a: Mesh Holes 230, 330: Corners 240, 340: Middle 250, 350: Fork pocket W: Load

Claims (8)

A support frame that enables transport pallets equipped with a pair of left and right fork pockets on opposite sides to be stacked with a load on the pallet.
The support frame has four strut units that are detachably erected at the four corners of the transport pallet, and each strut unit is
The pillars that make up the main body of the pillar unit and the pillars
A leg at the lower end of the pillar that can be inserted and fixed in the fork pocket,
A metal fitting that can support the four corners of the upper transport pallet at the upper end of the pillar,
It has a first connecting cross member and a second connecting cross member extending from the side surface of the upper end portion of the pillar portion toward the other two connecting cross members facing in the side direction of the transport pallet.
It is determined that the tips of the first connecting cross member and the tips of the second connecting cross member can be connected by the first lock member in a state where they are slidably overlapped with each other. Characterized support frame. The support frame according to claim 1, wherein the tips of the first connecting cross member and the tips of the second connecting cross member can be polymerized in a nested manner. The receiving metal fitting is arranged at the base end portion of the first connecting cross member, and the insertion shaft arranged at the lower part of the receiving metal fitting is detachably inserted and connected to the upper end portion of the pillar portion. The support frame according to claim 1 or 2, characterized in that. The support frame according to claim 3, wherein the second connecting cross member is connected to the pillar portion at a position higher than that of the first connecting cross member. A third connecting lateral surface in which each column unit extends from the side surface of the lower end portion of the column portion toward the other two column portions facing in the side direction of the transport pallet below the second connecting cross member. The support frame according to claim 4, wherein the support frame has a material, and the tips of the third connecting cross members can be connected to each other by a second locking member in a state of being polymerized in a nested manner. .. The third connecting cross member is arranged according to the height of the upper surface of the transport pallet, and the third connecting cross member is the transport pallet with the legs inserted and fixed in the fork pocket. The support frame according to claim 5, characterized in that it abuts on a side surface. The support frame according to any one of claims 1 to 6, wherein the leg portion is formed with a retaining claw portion that engages with the fork pocket of the transport pallet. The support frame according to any one of claims 1 to 7, wherein the first lock member and the second lock member are lock pins.

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