JP5156582B2 - Sheet pallet - Google Patents

Description

  The present invention relates to a sheet-like sheet pallet on which a load is placed.

  Conventionally, loads stacked in multiple stages via a sheet pallet are separated using a forklift with a push-pull device, or loaded using a forklift with a push-pull device. The placed sheet pallets are stacked.

  For example, when using a forklift equipped with a push-pull device to load a multi-stage load via a sheet pallet, the load located at the top is placed. The tab of the sheet pallet is clamped by the gripper disposed at the lower end of the face plate of the forklift with a push-pull device, and the tab of the sheet pallet clamped by the gripper is lifted upward to A wedge-shaped gap is formed between the back surface and the upper surface of the load located below, and the tip of the platen is inserted into this gap. After that, the face plate is moved backward, the sheet pallet on which the load is placed is transferred to the platen, and the load stacked in multiple stages is used using a forklift with a push-pull device, Staging is being done.

  In order to perform the operations as described above, moderate anti-slip properties are required so that the load placed on the upper surface of the sheet pallet does not easily slide and move with respect to the upper surface of the sheet pallet. At the same time, moderate slipperiness is required on the back surface of the sheet pallet so that the platen can be easily inserted.

  In order to satisfy the above-described requirements, a sheet pallet with a two-layer structure as a whole, in which the upper surface layer is molded with an anti-slip resin and the back layer is molded with a resin having slipperiness, is an example of a patent. It is disclosed in Document 1.

Japanese Utility Model Publication No. 57-143126

  As described above, as the upper surface layer of the sheet pallet, a flexible thermoplastic elastomer is used as well as having a slip resistance, and as a resin constituting the back surface layer, polyethylene or polypropylene having an appropriate slip property is used. However, since the thermoplastic elastomer is expensive, the sheet pallet disclosed in Patent Document 1 in which the thermoplastic elastomer is used on the entire upper surface layer of the sheet pallet is expensive. There was a problem of becoming.

  Next, another problem to be solved by the invention will be described with reference to FIGS.

  Reference numeral 100 denotes a sheet pallet. The sheet pallet 100 includes a substantially horizontal placement portion 100a on which the load Ca is placed, and a tab 100b that is inclined upward at a predetermined angle θ1 with respect to the placement portion 100a. And have. F is a forklift with a push-pull device. The forklift F with a push-pull device is provided with a gripper F ′ including a lower end horizontal portion f1a of the face plate f1 and a movable member f2 that can move up and down. The face plate f1 is configured to be movable up and down.

  At the time of the spreading work as described above, first, as shown in FIG. 7, the boundary portion 100c between the placing portion 100a and the tab 100b of the sheet pallet 100 constitutes the gripper F ′. The tip vertical surface f1a ′ on the load Ca side of the lower end horizontal portion f1a of the face plate f1 and the tip vertical surface f2a ′ on the load Ca side of the lower end horizontal portion f2a of the movable member f2 constituting the gripper F ′ are formed. The tab 100b of the sheet pallet 100 is disposed between the lower end horizontal part f1a of the face plate f1 and the lower end horizontal part f2a of the movable member f2 so as to substantially coincide with the virtual vertical plane. Further, the forklift F with a push-pull device is arranged so that the upper surface of the lower end horizontal portion f1a of the face plate f1 and the back surface of the placement portion 100a of the sheet pallet 100 form substantially the same plane.

  Next, the movable member f2 is moved downward, and as shown in FIG. 8, the tab 100b of the sheet pallet 100 is sandwiched between the lower end horizontal portion f1a of the face plate f1 and the lower end horizontal portion f2a of the movable member f2. . In the process of holding the tab 100b of the sheet pallet 100 by the lower end horizontal part f1a of the face plate f1 and the lower end horizontal part f2a of the movable member f2, it is inclined upward at a predetermined angle θ1 with respect to the placing part 100a. The tab 100b that has been bent is bent downward about the boundary portion 100c between the mounting portion 100a and the tab 100b, so that the tab 100b becomes substantially horizontal like the mounting portion 100a. Thus, when the tab 100b of the sheet pallet 100 is clamped by the lower end horizontal part f1a of the face plate f1 and the lower end horizontal part f2a of the movable member f2, the boundary part 100c between the placement part 100a and the tab 100b is It will be bent.

  Next, when the face plate f1 is lifted with the gripper F ′ holding the tab 100b of the sheet pallet 100, the lower surface c1 of the luggage Ca placed on the placement portion 100a of the sheet pallet 100 and the face A boundary portion 100c between the placement portion 100a of the sheet pallet 100 and the tab 100b, with a lower end corner portion (hereinafter referred to as a face plate side lower end corner portion) c3 formed by the side surface c2 positioned on the plate f1 side as a center. The band-like region 100a ′ of the mounting portion 100a located between the lower end corner portion c3 and the lower end corner portion c3 is pivoted upward, and therefore is in contact with the lower end corner portion c3 and along the lower end corner portion c3. The linear portion 100a ″ of the placed mounting portion 100a is bent.

  Further, as described above, when the face plate f1 is raised in a state where the tab 100b of the sheet pallet 100 is held by the gripper F ′, the boundary portion 100c between the placement portion 100a and the tab 100b is centered. The band-like region 100a ′ of the placing portion 100a located between the boundary portion 100c and the lower end corner portion c3 of the luggage Ca is bent in a state inclined downward with respect to the horizontal tab 100b. Therefore, the boundary portion 100c between the placement portion 100a and the tab 100b of the sheet pallet 100 is bent.

  As described above, with the gripper F ′ holding the tab 100b of the sheet pallet 100, the face plate f1 is raised, and the back surface of the sheet pallet 100 on the gripper F ′ side and the load Cb positioned below the A wedge-shaped gap is formed between the upper surface and the front end of the platen (not shown) is inserted into the gap, and the face plate f1 is moved backward to seat the load Ca on the platen. As the pallet 100 is transferred, the forklift F with a push-pull device is used to separate it.

  In the series of the above-described steps, when the tab 100b of the sheet pallet 100 is clamped by the gripper F ′, the tab 100b is centered on the boundary portion 100c between the placing portion 100a and the tab 100b of the sheet pallet 100. The boundary portion 100c between the placement portion 100a and the tab 100b of the sheet pallet 100 is bent by being rotated from a state inclined upward with respect to the placement portion 100a to a substantially horizontal state. become. Further, as described above, when the face plate f1 is raised in a state where the tab 100b of the sheet pallet 100 is held by the gripper F ′, the gripper F ′ is positioned between the boundary portion 100c and the lower end corner portion c3 of the luggage Ca. The band-like region 100a ′ of the mounting portion 100a rotates downward with respect to the horizontal tab 100b shown in FIG. 8 around the boundary portion 100c. It will be bent.

  As described above, the boundary portion 100c between the placing portion 100a and the tab 100b of the sheet pallet 100 is held by the gripper F ′ when the tab 100b is clamped by the gripper F ′. The face plate f1 is bent at the second time when the face plate f1 is lifted.

  Further, as described above, when the face plate f1 is raised with the gripper F ′ holding the tab 100b of the sheet pallet 100, the load Ca placed on the placement portion 100a of the sheet pallet 100 is raised. Centering on the lower end corner c3 formed by the lower surface c1 of the sheet and the side surface c2 located on the face plate f1 side, the boundary 100c between the placement portion 100a of the sheet pallet 100 and the tab 100b, and the lower end corner c3 The band-like region 100a ′ of the mounting portion 100a positioned between them is rotated upward, so that the mounting portion is in contact with the lower end corner portion c3 and positioned along the lower end corner portion c3. The linear portion 100a ″ of 100a is bent.

  After completion of the stripping work, the movable member f2 is moved upward to release the grip of the tab 100b of the sheet pallet 100 by the gripper F ′, and the forklift F with a push-pull device is moved backward to load the seat pallet 100. The strip-like region 100a ′ of the placement portion 100a located between the boundary portion 100c between the placement portion 100a and the tab 100b and the lower end corner portion c3 of the luggage Ca is a linear portion 100a ″ that is a bent portion. As shown in FIG. 7, the sheet pallet 100 is pivoted downward so that the entire mounting portion 100a is in a horizontal state, and the tab 100b is pivoted upward about the boundary portion 100c. As described above, the original state is restored by the elastic restoring force of the sheet pallet 100 itself.

  As described above, the stacking operation causes the boundary portion 100c between the placement portion 100a and the tab 100b of the sheet pallet 100 to be bent, and the belt-like region 100a ′ of the placement portion 100a and the lower surface c1 of the load Ca. The linear portion 100a ″ located at the boundary portion with the mounting portion 100a other than the belt-like region 100a ′ is bent frequently, and thus has a slipperiness but is made of polyethylene or polypropylene having poor flexibility. There is a problem that even when the back surface layer has a bent crease and the gripper is released from gripping the tab, the tab does not return to an upwardly inclined state with respect to the mounting portion due to its elastic force. Thus, if the tab does not return to the state of being inclined upward with respect to the mounting portion, the grip disposed on the lower end portion of the face plate of the tab forklift is disposed. Per clamping by difficult.

  In addition, as described above, the bending of the boundary portion 100c between the placing portion 100a and the tab 100b of the sheet pallet 100, the strip-like region 100a ′ of the placing portion 100a, and the strip-like region located on the lower surface c1 of the luggage Ca. Since the linear portion 100a ″ positioned at the boundary portion with the mounting portion 100a other than 100a ′ is frequently bent, the boundary portion 100c and the mounting portion 100a are damaged.

  An object of the present invention is to solve the problems of the conventional invention described above.

  In a sheet pallet having a placement portion and a placement portion that are connected to each other via a boundary portion, and a tab that is inclined upward, firstly, the tab and the tab are connected to each other via a boundary portion. The belt-shaped region constituting the mounting portion is molded with a highly elastic and highly slip-resistant resin, and the belt-shaped region constituting the mounting portion connected to the belt-shaped region is formed with high elasticity and high slip resistance. A hybrid region composed of an upper surface layer molded from a resin and a back surface layer molded from a low friction resin, and the remaining portion of the mounting portion is molded from a low friction resin. Are the upper surface layer formed of the high elasticity and high slip resistance resin constituting the hybrid region and the belt-shaped region formed of the high elasticity and high slip resistance resin connected to the tab via the boundary portion. It is configured to be placed on a part. , The third, the other side portion of the mounting section of the hybrid region is formed. A hybrid region is formed.

  The above-mentioned mounting portion that is formed of a highly elastic and highly anti-slip resin, and that is connected to the above-described strip-shaped region, is a band-like region that constitutes the above-described mounting portion that is connected to the tab via a boundary portion. The band-shaped region constituting the upper portion is a hybrid region composed of an upper surface layer formed of a highly elastic and highly anti-slip resin and a back surface layer formed of a low friction resin, and the remaining portion of the mounting portion is a low friction resin. In addition to preventing the bent boundary portion from being damaged, when the gripping of the tab of the sheet pallet by the gripper is released, the tab is quickly restored by its elastic restoring force. In addition, it is possible to reliably return to the original position inclined upward with respect to the placement portion.

  The belt-shaped region formed of a high-elasticity and high-slip-proof resin in which a load is connected to the upper layer formed of the high-elasticity and high-slip-proof resin constituting the hybrid region and the tab via the boundary portion. Since it is configured to be placed on a part of the luggage, it is possible to prevent the placement part located near the lower end corner of the luggage from being damaged, and the luggage placed on the placement part However, it is possible to prevent slipping and horizontal movement on the placement unit or detachment from the placement unit.

  On the other side of the mounting portion where the hybrid region is formed. Since the hybrid region is formed, it is possible to reliably prevent the load placed on the placement unit from slipping and moving horizontally on the placement unit or coming off the placement unit. .

  Examples of the present invention will be described below. However, the present invention is not limited to the examples of the present invention as long as the gist of the present invention is not exceeded.

  1 to 3, reference numeral 1 denotes a sheet pallet whose plane shape is formed in a substantially square shape. The sheet pallet 1 includes a substantially horizontal placing portion 1a on which a load is placed, and a placing portion 1a. And a strip-like tab 1b sandwiched by a gripper disposed at the lower end of a face plate of a forklift with a push-pull device formed on one side. Further, the tab 1b sandwiched by the gripper passes through the boundary portion 1c with respect to the substantially horizontal placement portion 1a on which the load is placed, and, as described above, upwards at a predetermined angle θ1 (mounting portion). (The angle formed between the upper surface of 1a and the upper surface of tab 1b).

  In the present embodiment, the tab 1b is made of a resin having high elasticity and excellent anti-slip properties (hereinafter referred to as high elasticity and high resistance) such as thermoplastic olefin elastomer, styrene elastomer, low density polyethylene, and ethylene vinyl acetate polymer. The belt-shaped region of the mounting portion 1a that extends beyond the boundary portion 1c and extends along the boundary portion 1c is formed with the entire width of the mounting portion 1a (the longitudinal direction of the tab 1b). A width along W1) is formed in a highly elastic / high slip resistant belt-like region 1a1 formed of the same high elasticity / high slip resistance resin as the tab 1b. In other words, the tab 1b and the band-like region 1a1 of the placement portion 1a adjacent to the tab 1b are formed of a highly elastic and highly anti-slip resin including the boundary portion 1c.

  Further, the mounting portion 1a is adjacent to the high-elasticity / high anti-slip belt-like region 1a1 formed on the mounting portion 1a along the boundary portion 1c, and the tab 1b and the high-elasticity / high anti-slip belt-like region 1a1. The top layer 1a2 'formed of the same highly elastic and highly anti-slip resin is more slippery than the above-described highly elastic and highly anti-slip resin such as polyethylene, polypropylene, and vinyl chloride resin. A hybrid region 1a2 is formed which includes a back layer 1a2 "formed of a resin having a lower frictional resistance than the band 1a1 and the high-elasticity / high anti-slip belt-shaped region 1a1 (hereinafter referred to as a low friction resin).

  The remaining region 1a3 of the mounting portion 1a adjacent to the high-elasticity / high anti-slip belt-shaped region 1a1 and the hybrid region 1a2 described above is formed of a low friction resin that constitutes the back layer 1a2 ″ of the hybrid region 1a2. As described above, the mounting portion 1a includes the high-elasticity / high anti-slip belt-like region 1a1, the upper surface layer 1a2 ′ formed of the high-elasticity / high anti-slip resin and the back layer 1a2 ″ formed of the low-friction resin. The hybrid region 1a2 and the remaining region 1a3 formed of a low friction resin.

  As described above, the tab 1b of the sheet pallet 1 and the belt-like region 1a1 that constitutes the placement portion 1a adjacent to the tab 1b are formed of a highly elastic and highly slip-resistant resin including the boundary portion 1c. As described above, the boundary portion 1c between the placing portion 1a and the tab 1b of the sheet pallet 1 is sandwiched between the tab 1b of the sheet pallet 1 by the gripper F ′ and the tab 1b is sandwiched by the gripper F ′. Even if the face plate f1 is lifted twice during the ascending operation, the boundary portion 1c is not damaged.

  Further, the tab 1b of the sheet pallet 1 and the belt-like region 1a1 constituting the placement portion 1a adjacent to the tab 1b are formed of a highly elastic and highly slip-resistant resin including the boundary portion 1c. When the clamping of the tab 1b of the sheet pallet 1 is released, the tab 1b is quickly and surely returned to the original position inclined upward with respect to the placement portion 1a by the elastic restoring force. Therefore, there is a problem in that the tab 100b is maintained in a horizontal state and the tab 100b is not pinched by the gripper F ′ disposed at the lower portion of the face plate f1 as in the prior art. Can be solved.

  As shown in FIG. 3, the side surface c2 located on the face plate f1 side of the cargo C constitutes the placement portion 1a adjacent to the tab 1b beyond the hybrid region 1a2 constituting the placement portion 1a. The luggage C is configured to be placed on the placement portion 1a of the sheet pallet 1 so as to be located in the highly elastic / slip resistant belt-like region 1a1.

  The load C is formed on the remaining region 1a3 formed of the low friction resin, the upper surface layer 1a2 ′ formed of the high elasticity / high slip resistance resin constituting the hybrid region 1a2, and a part of the high elasticity / high slip resistance belt-shaped region 1a1. It is configured to be placed, and at least the load C is placed on the upper surface layer 1a2 ′ and the highly elastic / high anti-slip belt-like region 1a1 formed of the high elastic / high anti-slip resin constituting the hybrid region 1a2. Since the load C placed on the placement portion 1a slips and moves horizontally on the placement portion 1a or comes off the placement portion 1a. Can be prevented.

  Further, when the face plate f1 is raised in a state where the tab 1b of the sheet pallet 1 is held by the gripper F ′, the lower surface c1 of the load C placed on the placement portion 1a of the sheet pallet 1 and the face Centered on the lower end corner c3 formed by the side surface c2 located on the plate f1 side, between the boundary 1c between the loading portion 1a of the sheet pallet 1 and the tab 1b and the lower end corner c3 of the load C The belt-like region 1a1 ′ constituting the high-elasticity / high-slip-proof belt-like region 1a1 is rotated upward similarly to the belt-like region 100a ′ shown in FIG. The linear portion of the highly elastic / high slip resistant belt-like region 1a1 in contact with c3 is bent, but in this embodiment, the bent high elasticity / high slip resistant belt region 1a1 is high. Elastic, and Because it is molded by slip resistant excellent resin, placement portion 1a located near the lower end corner portion c3 luggage C is able to prevent such damage.

  Furthermore, the band width of the highly elastic and highly slip-resistant band-shaped region 1a1 adjacent via the boundary portion 1c located between the placing portion 1a and the tab 1b (in the direction perpendicular to the longitudinal direction of the tab 1b). Width) When W2 holds the tab 1b of the sheet pallet 1 with the gripper F ′ disposed in the forklift F with the push-pull device, and lifts the tab 1b of the sheet pallet 1 clamped with the gripper F ′ upward. In addition, the high elasticity and high anti-slip belt-like region 1a1 formed on the placing portion 1a of the sheet pallet 1 is a load C placed on the lower sheet pallet 1a or a normal synthetic resin located below. It is preferable to have a width that does not contact the upper surface of the pallet. With this configuration, the platen of the forklift F with a push-pull device can be inserted into the lower surface of the mounting portion 1a of the sheet pallet 1 smoothly and without much resistance on the lower sheet pallet 1a. This can be done without damaging the placed luggage C.

  The embodiment shown in FIGS. 4 and 5 includes a hybrid region 1a2 composed of the upper surface layer 1a2 ′ formed of the above-described high-elasticity and high-slip-proof resin and the back surface layer 1a2 ″ formed of a low-friction resin. The mounting part perpendicular to the hybrid region 1a2 formed on the side of the boundary part 1c along the side part 1a4 of the mounting part 1a facing the hybrid region 1a2 formed on the boundary part 1c side. 4 and 5, the hybrid region formed along the side 1a4 is denoted by reference numeral 1a2 (2a4), and is also formed along the side 1a5. The hybrid region formed along the side 1a5 is denoted by reference numeral 1a2 (2a5).

  As described above, the hybrid region 1a2 (2a4) is formed along the side portion 1a4 of the placement portion 1a, and the hybrid region 1a2 (2a5) is formed along the side portion 1a5 of the placement portion 1a. Thus, it is possible to reliably prevent the load C placed on the placement portion 1a from slipping and moving horizontally on the placement portion 1a or coming off the placement portion 1a.

  In the embodiment shown in FIG. 6, on the back side of the sheet pallet 1, a back belt-like body 1a6 made of a highly anti-slip resin at the center of the tab 1b and substantially orthogonal to the tab 1b is formed. . As the high slip resistance resin, a resin having excellent slip resistance, such as synthetic rubber, thermoplastic olefin elastomer, styrene elastomer, low density polyethylene, ethylene vinyl acetate polymer, or the like can be used. The back strip 1a6 can be formed so as to reach the surface of the sheet pallet 1 or can be formed so as not to reach the surface of the sheet pallet 1.

  As described above, by forming the back strip 1a6 made of highly anti-slip resin on the back side of the sheet pallet 1, the sheet pallet 1 on which the luggage C is placed is placed on a normal synthetic resin pallet. When the sheet pallet 1 slides in the horizontal direction with respect to the synthetic resin pallet, the sheet pallet 1 on which the load C is placed can be prevented from dropping from the synthetic resin pallet. it can.

  Further, when the back surface strip 1a6 is formed so as to reach the surface of the sheet pallet 1, the load C placed on the placement unit 1a slides and moves horizontally on the placement unit 1a, Or it can prevent more reliably that it remove | deviates from the mounting part 1a.

  A forklift with a push-pull device in which a platen made up of a pair of sub-platens arranged with a predetermined gap is provided is known, and a forklift with such a push-pull device is shown in FIG. When the pallet 1 is used, the back plate 1a6 made of highly anti-slip resin is positioned in the gap between the pair of sub plates so that the sub platen comes into contact with the back plate 1a6. Therefore, the sub platen can be inserted into the contact surface between the sheet pallet 1 on which the load is placed and the pallet.

FIG. 1 is a perspective view of a sheet pallet according to the present invention. FIG. 2 is a partial vertical sectional view of the sheet pallet shown in FIG. FIG. 3 is a partial vertical sectional view of the sheet pallet and face plate of the present invention. FIG. 4 is a perspective view of a sheet pallet according to another embodiment of the present invention. FIG. 5 is a partial vertical sectional view of the sheet pallet shown in FIG. FIG. 6 is a perspective view of a sheet pallet according to still another embodiment of the present invention. FIG. 7 is a partial vertical sectional view of a conventional sheet pallet and face plate. FIG. 8 is a partial vertical sectional view similar to FIG. 7 in a state where the tab is sandwiched by the gripper disposed on the face plate shown in FIG. FIG. 9 is a partial vertical cross-sectional view similar to FIG. 7 with the face plate shown in FIG. 7 raised.

Explanation of symbols

C ... Luggage F ... Forklift with push-pull device F '... Gripper f1, ... Face plate f2, ...・ ・ ・ Moving member 1 ・ ・ ・ ・ ・ ・ ・ ・ Sheet pallet 1a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Place 1b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Tab 1c ・ ・ ・ ・ ・ ・ ・ ・ Boundary 1a1 ・ ・ ・... Highly elastic, high slip-resistant belt-like area 1a2 ... Hybrid area 1a3 ... Remaining area

Claims (3)

  In the sheet pallet having a placing portion and a placing portion connected to the placing portion via a boundary portion, and a tab that is inclined upward, the above-described placing device connected to the tab and the tab via the boundary portion. The belt-like region constituting the part is molded from a highly elastic and highly slip-resistant resin, and the belt-like region constituting the mounting portion connected to the belt-like region is molded from a highly elastic and highly slip-resistant resin. The sheet pallet is characterized in that it is formed as a hybrid region comprising a top surface layer and a back layer molded with a low friction resin, and the remaining portion of the mounting portion is molded with a low friction resin. . The belt-shaped region formed of a high-elasticity and high-slip-proof resin in which a load is connected to the upper layer formed of the high-elasticity and high-slip-proof resin constituting the hybrid region and the tab via the boundary portion. The sheet pallet according to claim 1, wherein the sheet pallet is configured to be placed on a part of the sheet pallet. On the other side of the mounting portion where the hybrid region is formed. The sheet pallet according to claim 1, wherein a hybrid region is formed.

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