JP2006298403A - Pallet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pallet in which the bonding strength of an anti-skid member withstanding an impact when a sliding load or a fork collides with the anti-skid member from the side, with a deck part is provided. <P>SOLUTION: At least a top surface part of the pallet 1 is formed by coinjection molding of a rigid synthetic resin 2 and a flexible synthetic resin 3. The top surface part consists of a deck part 4 having a fork inserting part 6 formed of the rigid synthetic resin 2 and an anti-skid member 5 formed of the flexible synthetic resin 3 over a top surface of the deck part 4 and a top surface of the fork inserting part 6. A load anti-skid part 7 is formed by projecting an upper portion of the anti-skid member 5 above the top surface of the deck part 4. A fork anti-skid part 8 is formed by projecting a lower portion of the anti-skid member 5 below the top surface of the fork inserting part 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pallet made of synthetic resin.

  Conventionally, it is known from Patent Document 1 that a pallet is formed by two-color molding.

  In the conventional example shown in Patent Document 1, the deck portion 4 constituting the main body of the upper surface portion of the pallet 1 is molded with the hard synthetic resin 2 and the non-slip member 5 provided on the upper surface of the deck portion 4 is softly synthesized. Molded with resin 3. Specifically, as shown in FIG. 13, the upper part of the anti-slip member 5 protrudes upward from the upper surface of the deck part 4 to form a load anti-slip part 7 that prevents the load E loaded on the upper surface of the deck part 4 from slipping. The lower part of the anti-slip member 5 is embedded in the deck part 4 and integrated by two-color molding.

  However, the pallet 1 of this conventional example is not related to the slip prevention of the fork into the fork insertion portion with respect to the pallet 1 when the fork of the forklift is inserted into the fork insertion portion provided in the deck portion 4 to lift the pallet 1. There is a possibility that the pallet 1 cannot be stably supported with respect to the fork inserted into the fork insertion portion. Further, as shown in FIG. 13, when the load E slides along the upper surface of the deck portion 4 when the load E is loaded and hits the load anti-slip portion 7 of the anti-slip member 5 from the side. The resistance against the impact so as to maintain the joint between the anti-slip member 5 and the deck portion 4 at the joining interface between the anti-slip member 5 and the deck portion 4 is mainly orthogonal to the impact. This is only the joining interface (D portion in the figure) with a short distance between the deck portion 4 which is a surface and the side surface portion of the portion embedded in the deck portion 4 of the anti-slip member 5. However, even if it is firmly integrated by two-color molding, there is a problem that it is not possible to obtain the bonding strength between the anti-slip member 5 and the deck portion 4 that can withstand the impact. In other words, since the anti-slip member 5 of the pallet 1 of the conventional example has a structure provided so as to overlap the upper surface portion of the deck portion 4, the bonding strength between the anti-slip member 5 and the deck portion 4 is as follows. Although it can withstand the anti-slip of E, it cannot have the strength to withstand the impact when the load E that slides during loading hits the anti-slip member 5 from the side. .

In addition, in the pallet 1 made of synthetic resin, as in Patent Document 2, the anti-slip of the fork inserted into the anti-slip part of the fork provided in the deck part is intended, and the anti-slip member is placed below the upper surface of the fork insertion part. Some have a fork non-slip part that protrudes. However, this non-slip member is a rubber member manufactured separately from the deck part, and is integrated with the deck part by insert molding at the time of molding the deck part. Unlike two-color molding, which is integrated by self-adhesiveness when molding two types of resins, it is performed only by self-adhesiveness when molding the resin that constitutes the deck part. It is not possible to obtain a strong bonding force at the bonding interface with the deck portion. Therefore, depending on the impact when the load to be slid or the fork hits the anti-slip member, the anti-slip member is peeled off from the deck portion due to interface peeling. In particular, the impact when the fork of a forklift inserted into the fork insertion part hits the fork slip part is larger than that when the load to slide hits the load slip part, and it is added to the slip member. The anti-slip member is more easily peeled off from the deck portion by the impact.
No. 7-39793 Japanese Patent Publication No. 7-37044

  The present invention has been made in view of the above-described conventional problems, and is a joining of a non-slip member and a deck portion that can withstand an impact when a load or fork that slides hits the anti-slip member from the side. It is an object of the present invention to provide a pallet capable of obtaining strength.

  In order to solve the above-described problem, the pallet according to claim 1 of the present invention is such that at least the upper surface portion of the pallet 1 is formed by two-color molding of the hard synthetic resin 2 and the soft synthetic resin 3, and the upper surface is formed. And a non-slip member 5 formed of the soft synthetic resin 3 over the deck portion 4 having the fork insertion portion 6 formed of the hard synthetic resin 2 and the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6. The upper part of the anti-slip member 5 protrudes upward from the upper surface of the deck part 4 to form a load anti-slip part 7, and the lower part of the anti-slip member 5 is below the upper face of the fork insertion part 6. The fork non-slip portion 8 is formed by projecting. According to this, the integration of the non-slip member 5 and the deck portion 4 is the self-forming at the time of two-color molding of both the hard synthetic resin 2 for molding the deck portion 4 and the soft synthetic resin 3 for molding the anti-slip member 5. Due to the adhesiveness, it is firmly performed over the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6, and the joint interface between the anti-slip member 5 and the deck portion 4 is the load slide of the anti-slip member 5. It is a surface that is substantially perpendicular to the direction of impact that the load E and fork F slid on the stopper 7 and the fork anti-skid part 8 and has a long surface that extends over the top surface of the deck portion 4 and the top surface of the fork insertion portion 6. Since the load E or fork F that slides collide with the anti-slip member 5 from the side, the anti-slip member 5 and the deck part 4 are joined to each other. Made, and therefore slides Nobutsu E and forks F, it is possible to obtain a bonding strength between the anti-slip member 5 and the deck section 4, which can withstand the impact when hitting a slip stopper member 5.

  In addition to the first aspect, the pallet according to the second aspect has the upper surface of the deck portion 4 or the fork insertion portion 6 on at least one of the load anti-slip portion 7 to the fork anti-slip portion 8 of the anti-slip member 5. A laminated non-slip portion 9 is provided along the upper surface and laminated and integrated by two-color molding. According to this, in addition to the joint interface between the anti-slip member 5 and the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6, the laminated anti-slip portion 9 and the upper surface of the deck portion 4 or the fork insertion portion 6 The joining interface with the upper surface can also maintain the joining state of the anti-slip member 5 and the deck portion 4 against the impact when the load E or the fork F hits the anti-slip member 5, that is, the slide Therefore, it is possible to obtain a strong bonding strength between the deck member 4 and the strong anti-slip member 5 that can withstand the impact applied to the anti-slip member 5 when the load E or the fork F collide with.

  In addition to the first aspect, the pallet according to the third aspect has a structure in which at least one of the upper surface and the lower surface of the anti-slip member 5 is exposed to at least one of the exposed portion and the upper surface of the deck portion 4 or the fork insertion portion 6. A load anti-skid part 7 or a fork anti-skid part 8 is projected upward or downward from the upper surface, and another part of the exposed part is placed on the deck via the boundary between the anti-slip member 5 and the deck part 4. The upper surface of the part 4 or the upper surface of the fork insertion part 6 is made to be flush with the upper surface. According to this, when the load E or fork F that slides collides with the load anti-skid part 7 or the fork anti-skid part 8, the slide that can be continued flush with the upper surface of the deck part 4 or the upper surface of the fork insertion part 6. The other part of the exposed portion of the stop member 5 is in a state where the load E and the fork F are suppressed, and the anti-slip member 5 can be prevented from being peeled off from the deck portion 4.

Further, in addition to claim 2, the pallet according to claim 4 hangs a number of reinforcing ribs 11 downward from the load placing portion 10 on which the load E is placed on the upper surface, and the deck portion 4 is lowered. The anti-slip member 5 is integrated by two-color molding along the rib 11 that hangs down from the load mounting portion 10, and the thickness T ₁ of the laminated anti-slip portion 9 of the anti-slip member 5 is set to the thickness of the rib 11. It is characterized in that it is thinner than T ₂ and the thickness T ₃ of the part of the non-slip member 5 integrated along the rib 11. According to this, the amount of the expensive soft synthetic resin 3 such as an elastomer can be reduced, and the manufacturing cost of the pallet 1 can be reduced, and the non-slip integrated by two-color molding along the rib 11. The portion of the member 5 is relatively thicker than the laminated anti-skid part 9, so that when the injection gate of the molding die is provided in the laminated anti-skid part 9, the thin laminated anti-skid part Since the resin can smoothly flow from the portion 9 toward the portion of the anti-slip member 5 integrated by two-color molding along the rib 11, the productivity of the pallet 1 can be improved. it can.

  According to the present invention, the integration of the non-slip member and the deck portion is based on the self-adhesiveness during the two-color molding of the hard synthetic resin for molding the deck portion and the soft synthetic resin for molding the non-slip member. It is firmly performed over the upper surface and the upper surface of the fork insertion portion, and the joint interface between the anti-slip member and the deck portion is a load that slides on the load anti-slip portion or the fork anti-slip portion of the anti-slip member. In addition, it has a long surface that extends substantially perpendicular to the direction of impact with which the fork hits and the top surface of the deck portion and the top surface of the fork insertion portion. The anti-slip member and deck unit are designed to be resistant to impacts when they collide with each other. Therefore, they can withstand the impacts of sliding loads and forks against the anti-slip members. Gain It has the advantage that the bonding strength between the anti-slip member and the deck section is obtained.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  1 to 9 show an embodiment of a pallet 1 according to the present invention. The pallet 1 has at least an upper surface portion of the pallet 1 and a deck portion 4 made of a hard synthetic resin 2 constituting the main body thereof. The non-slip member 5 made of the soft synthetic resin 3 is molded by integral molding by two-color molding with a two-color injection molding machine. Here, the two-color molding is a molding method in which two sets of injection molding devices are provided for one set of clamping devices and two or two types of molding materials (different types of molding materials) are injected simultaneously or sequentially. In the two-color molding of the present invention, it is essential that one of the two types of molding materials used is the hard synthetic resin 2 and the other is the soft synthetic resin 3. In the case where the resin 3 is the same color, both cases of different colors are included in the two-color molding of the present invention.

  As shown in FIGS. 2 to 4, the pallet 1 of this example is formed by welding and integrating a pallet upper half 1a and a pallet lower half 1b. The pallet upper half 1a is as shown in FIGS. 5 and 6, and is formed by integrally projecting a plurality of girder halves 12a downward on the lower surface of the deck portion 4 having a square shape in plan view. The lower half 1b is formed by integrally projecting a plurality of beam halves 12b on the upper surface of the deck portion 4 upward. As shown in FIG. 3, the pallet 1 is formed by welding and integrating the spar half 12a of the pallet upper half 1a and the spar half 12b of the pallet lower half 1b. The beam half 12a and the beam half 12b are welded to form the beam 12 and the fork insertion portion 6 for inserting the fork F of the forklift for lifting the pallet 1 is formed between the beams 12. In each of the embodiments shown in the accompanying drawings, the fork insertion portion 6 has an example of four-way insertion that opens on each side of the front, rear, left, and right. It may be.

  The deck portion 4 has a shape as the pallet 1 and has a strength as the pallet 1 and is molded from the hard synthetic resin 2. Here, as the hard synthetic resin 2, for example, PP (polypropylene), PE (polyethylene), HDPE (high density polyethylene), PC (polycarbonate), PVC (vinyl chloride resin), ABS resin and the like are used, and these resins are used. It may be a virgin resin or a recycled resin made from synthetic resin waste.

  The anti-slip member 5 is formed so as to extend over the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6 which is the lower surface of the deck portion 4. A load non-slip portion 7 is formed to prevent the load E loaded on the upper surface of the deck portion 4 from sliding on the pallet 1, and the upper surface of the fork insertion portion 6 is formed below the anti-slip member 5. A fork non-slip portion 8 that prevents the fork F inserted into the fork insertion portion 6 from slipping with respect to the pallet 1 is formed. The upper part of the anti-slip member 5 is a laminated anti-skid part 9 laminated and integrated on the upper surface of the deck part 4, and a part of the laminated anti-skid part 9 forms a load anti-skid part 7. Yes. The anti-slip member 5 is formed of a soft synthetic resin 3, and as the soft synthetic resin 3, an olefin elastomer, a styrene elastomer, an ethylene vinyl acetate copolymer, or the like is used.

  Here, on the upper part of the non-slip member 5 of this example, as described above, the laminated anti-skid part 9 laminated and integrated on the upper surface of the deck part 4 is provided. A part of the exposed upper surface of the exposed part is a load slip prevention part 7 projecting upward from the upper surface of the deck part 4, and another part of the exposed upper surface is formed with the upper surface of the deck part 4 by two-color molding. It is a flat surface 13 that is flush with the boundary. Further, the flat surface 13 and the anti-slip portion 7 are shaped so as to be connected via the inclined surface 14. Thus, as shown in FIG. 1A, when the load E is placed on the upper surface of the deck portion 4, the load E moves in the direction of arrow A with the load E placed on a part of the upper surface of the deck portion 4. At this time, the bottom surface of the load E hits the inclined surface 14 which is the side surface of the load anti-slip portion 7 in a state where the lower surface of the load E is placed on the flat surface 13. Even if the stop member 5 is peeled off from the deck portion 4, the flat surface 13 is pushed down by the load E, so that the anti-slip member 5 is prevented from being peeled off and inclined. 14, the load E is smoothly placed on the upper surface of the load non-slip portion 7. Further, in the non-slip member 5 of this example, the lower surface portion 13a of the flat surface 13 is shaped so as to be fitted and caught in the recess 15 recessed downward from the upper surface of the deck portion 4. The peeling prevention effect from the deck part 4 of the stop member 5 is heightened. More specifically, in this example, the boundary between the inclined surface 14 and the flat surface 13 is curved so that dust, sand or the like accumulated above the pallet can be easily removed with a broom.

  In addition, the laminated antiskid part 9 of the antiskid member 5 of this example includes an outer peripheral antiskid part 9a extending over the outer periphery of the upper surface of the deck part 4, and an upper surface part of the deck part 4 surrounded by the outer peripheral antiskid part 9a. It is formed in a shape in which front and rear and left and right inner anti-slip portions 9b crossed in a cross shape in plan view so as to be divided into four equal parts in a rectangular shape are integrated. As a result, the left and right sides of the top surface of the deck portion 4 have left and right sides and a central portion with a load-slip prevention portion 7 that is long in the front-rear direction, and the front and rear direction of the top surface of the deck portion 4 is Since there is a long load anti-slip portion 7 in the left-right direction, when the load E is placed on the upper surface of the deck portion 4, the load E is prevented from sliding in the front-rear direction and the left-right direction. ing. In addition, since the anti-slip member 5 having the above-described shape is formed by connecting the straight portions with the shape of the laminated anti-slip part 9, a small number of gates are formed in the molding die when the anti-slip member 5 is formed. Even in this case, the resin can be easily flowed, and the mold structure can be simplified.

  Further, in the anti-slip member 5, a penetrating part 16 penetrating the deck part 4 in the thickness direction is suspended from an appropriate position of the inner anti-slip part 9 b crossing over the fork insertion part 6. The lower end surface portion of the penetration portion 16 is exposed in the fork insertion portion 6, and a part of the exposed lower surface of the penetration portion 16 protrudes downward from the upper surface of the fork insertion portion 6 to form the fork slip prevention portion 8. ing. The other part of the exposed lower surface of the penetrating portion 16 is a flat surface 17 that is flush with the upper surface of the fork insertion portion 6, and the flat surface 17 and the fork slip preventing portion 8 are connected via an inclined surface 18. Has been. The deck section 4 of this example is formed by projecting a number of reinforcing ribs 11 downward from a horizontal plate-shaped load mounting section 10 that forms the upper surface of the deck section 4. Also, an annular rib 11a that opens up and down is formed in a part of the rib 11, and a cylindrical through portion 16 made of a soft synthetic resin 3 is integrated by two-color molding along the inner peripheral portion of the annular rib 11a. It is. A fork non-slip portion 8 is formed protruding downward from the lower surface of the annular rib 11a facing the fork insertion portion 6 which is the upper surface of the fork insertion portion 6. Accordingly, as shown in FIG. 1A, when the fork F of the forklift is inserted into the fork insertion portion 6, the inclined surface 18 in which the tip portion of the fork F that moves in the direction of arrow B is the side surface of the fork antiskid portion 8. Therefore, the flat surface 17 is pushed up by the fork F even if the anti-slip member 5 is peeled off from the deck portion 4 due to the force when hitting the inclined surface 18, and the flat surface 17 is pushed up by the fork F. The stopper member 5 is prevented from peeling and dripping, and is guided by the inclined surface 18 so that the lower surface of the fork non-slip portion 8 is smoothly placed on the tip portion of the fork F. The pallet 1 can be prevented from slipping.

  By the way, although the upper surface part of the pallet 1 of the present example is formed by two-color molding of the non-slip member 5 and the deck part 4, a manufacturing example thereof will be described with reference to FIG. 7, FIG. 8, and FIG. .

  FIG. 7 shows a schematic perspective view of the movable mold 21 in the mold apparatus for molding the upper half 1a of the pallet 1 made of synthetic resin by two-color molding, and FIG. 8 shows a part of the mold apparatus. Sectional drawing which fractured | ruptured is shown, Fig.9 (a) (b) (c) (d) has shown the shaping | molding order. In the figure, 20 is a fixed mold, and 21 is a movable mold. The movable mold 21 has a groove 22 formed in a direction away from the fixed mold 20 from the surface on the fixed mold 20 side. The groove portion 22 includes a square annular outer groove portion 23, a portion surrounded by the outer groove portion 23 divided into a cross shape, and a cross-shaped inner groove portion 24 whose end portion communicates with the outer groove portion 23, and a portion in the inner groove portion 24. It is comprised with the annular groove part 25 provided in detail.

  A main slide core 27 is movably fitted in the groove portion 22 provided in the movable mold 21. The main slide core 27 includes a square annular outer slide core portion 28 fitted in the outer groove portion 23, a cross-shaped inner slide core portion 29 fitted in the inner groove portion 24, and an annular slide core portion fitted in the annular groove portion 25. 30 is connected and integrated, and is moved forward and backward in the groove 22 by a hydraulic cylinder 32.

  An annular sub-slide core 33 is slidably fitted into the annular slide core portion 30, and the sub-slide core 33 can be moved forward and backward with respect to the annular slide core portion 30 by a hydraulic cylinder 34.

  An outer peripheral protrusion 30a having a flat tip surface is provided on the outer periphery of the tip surface portion of the annular slide core portion 30, and an inner periphery of the tip surface portion of the annular slide core portion 30 is an inner periphery having a flat tip surface. A step surface 30b is provided. Further, an inner peripheral protrusion 33a having a flat tip surface is provided on the inner periphery of the tip surface portion of the sub slide core 33, and the outer periphery of the tip surface portion of the sub slide core 33 is an outer periphery in which the tip surface is a flat surface. A step surface 33b is provided.

  Although not shown in the drawing, the fixed mold 20 includes a first gate for injecting the hard synthetic resin 2 and a second gate for injecting the soft synthetic resin 3. The fixed mold 20 has a large number of rib-forming recesses for forming the ribs 11. The annular rib-forming recesses for forming the annular rib 11a in a part of the rib-forming recesses. 36 is formed, and a hole forming projection 37 for forming a hole inside the annular rib 11 a is formed in the annular rib forming recess 36. Of the inner surface of the annular rib forming recess 36, the inner peripheral side inner surface 39 of the inner surface is deeper than the outer peripheral side inner surface 38.

  The movable mold 21 is moved forward toward the fixed mold 20 and is clamped. In this case, the main slide core 27 provided on the movable mold 21 is protruded from the groove portion 22. The auxiliary slide core 33 is advanced by a predetermined dimension with respect to the annular slide core portion 30 while being advanced by a predetermined dimension, so that the state shown in FIG. In this state, a deck portion forming cavity 35 for forming the deck portion 4 is formed between the movable die 21 and the fixed die 20. Although not shown, the deck portion forming cavity 35 is also continuous with the beam portion forming cavity for forming the beam portion 12 formed between the movable mold 21 and the fixed mold 20. The annular sub-slide core 33 moves forward to fit into the annular rib forming recess 36 of the fixed mold 20 through a gap as shown in FIG. 9A, and the outer surface of the sub-slide core 33 and the annular rib A gap between the molding recess 36 becomes an annular rib molding cavity 43 for molding the annular rib 11a. In addition, the outer peripheral projection 30 a and the inner peripheral step surface 30 b at the tip of the annular slide core portion 30 that is a part of the main slide core 27 protrude into the deck portion forming cavity 35. Further, the outer peripheral step surface 33b that is the flat surface of the tip surface portion of the sub slide core 33 and the outer peripheral side inner surface 38 that is the flat surface of the inner surface of the concave portion 36 for forming the annular rib are continuous with each other, An inner peripheral protrusion 33 a on the distal end surface portion of the sub slide core 33 is fitted into and abuts on the inner peripheral side inner surface 39 of the inner surface of the annular rib forming recess 36.

  The state shown in FIG. 9A is the mold clamping completion stage, and in this mold clamping completed state, the hard synthetic resin 2 is injected into the deck portion molding cavity 35 as shown in FIG. The part 4 and the girder part 12 are formed.

  Next, a laminated non-slip portion for retracting the main slide core 27 by a predetermined dimension with respect to the movable mold 21 and filling the soft synthetic resin 3 between the front end surface of the main slide core 27 and the upper surface of the deck portion 4. The forming cavity 40 is formed. With the main slide core 27 retracted by a predetermined dimension, as shown in FIG. 9C, the front end surface portion of the annular slide core portion 30 which is a part of the main slide core 27 is formed. The front end surface of the outer peripheral projection 30a and the front surface of the movable mold 21 are flush with each other. At the same time, the secondary slide core 33 is retracted by a predetermined dimension with respect to the annular slide core portion 30, and the outer peripheral step surface 33 b of the secondary slide core 33 and the inner peripheral step surface 30 b of the annular slide core portion 30 as shown in FIG. And keep them flush with each other. By doing so, the inner peripheral surface of the annular rib 11 a of the deck portion 4, the hole forming projection 37, the inner peripheral side inner surface 39, the distal end surface portion of the annular slide core portion 30, and the auxiliary slide core 33. A through-portion forming cavity portion 41 and a fork anti-slip portion forming cavity portion 42 continuous with the laminated anti-slip portion forming cavity 40 are formed in a portion surrounded by the tip surface portion.

  Next, as shown in FIG. 9 (d), the soft synthetic resin 3 is injected into the laminated anti-slip part molding cavity 40, the through part molding cavity part 41 communicating therewith, and the fork anti-slip part molding cavity part 42. Then, the non-slip member 5 is integrally formed on the deck portion 4 by two-color molding. After forming the pallet 1 of the present invention by two-color molding as described above, the mold is opened by retracting the movable mold 21 away from the fixed mold 20, and the molded upper half of the pallet The upper half of the pallet in which the non-slip member 5 made of the soft synthetic resin 3 as shown in FIGS. 4 and 5 and the deck portion 4 and the girder portion 12 made of the hard synthetic resin 2 are integrated as shown in FIGS. 1a is obtained.

Note that hard thickness T ₁ of the multilayer anti-slip portion 9 of the anti-slip member 5 is molded by soft synthetic resin 3 is integrally laminated by two-color molding on the upper surface of the deck section 4, as shown in FIG. 1 (b) synthesis deck 4 which is molded by the resin 2 (load mounting portion 10 and the rib 11 (annular rib 11a included)) is made thinner than the thickness T ₂ of the expensive soft synthetic resin 3 as an elastomer Although there is an advantage that the amount of use can be reduced, when the anti-slip member 5 is formed, the dimension in the thickness direction of the laminated anti-slip part forming cavity 40 is narrowed. While filling the narrow laminated anti-slip part molding cavity 40 with the soft synthetic resin 3, the flow direction of a part of the soft synthetic resin 3 flowing through the laminated anti-slip part forming cavity 40 is changed to change the through part forming cavity part 41. , Pho Click slipping when stop portion filled by flowing the molding cavity 42, through portion molding cavity 41, the soft synthetic resin 3 on the fork-slip portion molding cavity portion 42 becomes hard to flow smoothly. Therefore, the dimension in the thickness direction of the through-portion molding cavity portion 41 is made larger than the dimension in the thickness direction of the laminated anti-slip portion molding cavity 40 (preferably larger than the dimension in the thickness direction of the deck portion molding cavity 35. Thus, the soft synthetic resin 3 flowing through the laminated anti-slip part molding cavity 40 having a narrow thickness direction dimension is passed through a part of the laminated anti-slip part forming cavity 40 to change the flow direction, and penetrates through the large dimension in the thickness direction. It is possible to smoothly flow and fill the part forming cavity part 41, and thus the fork non-slip part forming cavity part 42. Accordingly, the pallet 1 of the present embodiment, the thickness T ₃ of the portion of the annular through-portion 16 of the anti-slip member 5 to be molded, rather than the thickness T ₁ of the multilayer anti-slip portion 9 as shown in FIG. 1 (b) The wall thickness is set. Incidentally, according to the reduced thickness T ₁ of the multilayer anti-slip portion 9 made solidified cold in the soft synthetic resin 3 is fast mold, it is possible to open the fast mold after the injection of the soft synthetic resin 3 However, there is an advantage that the molding cycle is shortened and the manufacturing cost is reduced.

  In addition, although the pallet lower half 1b uses what was formed with the hard synthetic resin 2, similarly to the pallet upper half 1a, the deck part 4 which consists of the hard synthetic resin 2, and the non-slip member which consists of the soft synthetic resin 3 5 may be integrally formed by two-color molding. In this case, the pallet 1 formed by welding the pallet upper half 1a and the pallet lower half 1b obtained as described above can be used upside down and provided on the pallet lower half 1b. The load anti-slip portion 7 of the anti-slip member 5 protrudes downward from the lower surface of the pallet 1 and can have an anti-slip function with respect to the mounting surface such as the ground surface of the pallet 1.

  As described above, when the deck portion 4 and the non-slip member 5 are integrated by two-color molding, there is a junction interface between the hard synthetic resin 2 that forms the deck portion 4 and the soft synthetic resin 3 that forms the anti-slip member 5. Thus, a strong bonding strength can be obtained by the self-adhesiveness at the time of molding both the hard synthetic resin 2 and the soft synthetic resin 3. In addition, the non-slip member 5 is firmly integrated with the deck portion 4 by two-color molding over a portion extending between the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6 (in this example, the through portion) 16 is firmly integrated by two-color molding along the annular rib 11a). As shown in FIG. 1 (a), the load E sliding along the upper surface of the deck portion 4 collides with the load anti-slip portion 7 of the anti-slip member 5, or the fork of the anti-slip member 5 Even when the fork F that slides along the upper surface of the fork insertion portion 6 collides with the anti-slip portion 8, the load applied to the anti-slip member 5 at the strong joint interface between the deck portion 4 and the anti-slip member 5 It has a substantially orthogonal surface that can effectively resist an impact from the object E or the fork F over a portion extending between the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6, and slides. A structure in which the anti-slip member 5 and the deck portion 4 have a strong resistance against an impact when the load E and the fork F collide with the anti-slip member 5 from the side is formed. Therefore, it is possible to obtain a bonding strength between the anti-slip member 5 and the deck portion 4 that can withstand an impact when the load E or the fork F collides with the anti-slip member 5. This eliminates the possibility of occurrence of interface peeling or the like from the deck portion 4.

The impact when the load E or the fork F collides with the anti-slip member 5 is such that the anti-slip member 5, the upper surface of the deck portion 4, the upper surface of the fork insertion portion 6, and the upper surface of the fork insertion portion 6. It is propagated to the deck portion 4 and supported by the deck portion 4 through a joining interface (in this example, a joining interface between the penetrating portion 16 and the annular rib 11a). Therefore, if strength reinforcement is applied to a portion extending between the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6 where the anti-slip member 5 is integrated by two-color molding, the load E and the fork F are attached to the anti-slip member 5. It is preferable because the resistance of the pallet 1 to the impact at the time of collision can be improved. In order to apply the strength reinforcement, for example, the rib 11 integrated along the through-hole 16 may be formed thicker than the other ribs 11. Since a problem may occur, as shown in FIG. 10, the interval L ₁ between the adjacent rib 11 and the rib 11 (in this example, the annular rib 11 a) integrated with the penetrating portion 16 is set to other adjacent ribs. it is preferable to narrower than the distance L ₂ between 11, according to this, while securing a good pallet 1 of manufacturability, to impact when the cargo E and forks F is bumped into the anti-slip member 5 Effective reinforcement can be applied to the deck portion 4.

  More specifically, as shown in FIG. 1B, the anti-slip member 5 of this example is provided with a laminated anti-skid part 9 laminated and integrated by two-color molding on the upper surface of the deck part 4. In addition to the joint interface between the anti-slip member 5 and the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6, the stacking anti-slip portion 9 and the upper surface of the deck portion 4 can also be loaded. The resistance against the impact applied to the anti-slip member 5 when the object E and the fork F collide with each other can be improved, and the joint state between the anti-slip member 5 and the deck portion 4 can be maintained. That is, the laminated anti-slip portion 9 of the anti-slip member 5 is laminated and integrated on the upper surface of the deck portion 4 by two-color molding, so that the impact applied to the anti-slip member 5 when the load E or fork F collides with each other. In addition, a strong anti-slip member 5 and a deck portion 4 that can be further tolerated can be obtained, and there is no further risk of occurrence of interfacial peeling from the deck portion 4 of the anti-slip member 5. It was made to do. In this example, the laminated antiskid part 9 is provided on the load antiskid part 7 of the antiskid member 5 and laminated and integrated by two-color molding along the upper surface of the deck part 4. It is also preferable to provide a laminated non-slip portion 9 that is laminated and integrated by two-color molding along the upper surface of the fork insertion portion 6. Further, in this example, a gate for injecting the soft synthetic resin 3 is provided in the laminated antiskid part 9 provided in the load antiskid part 7 of the antiskid member 5, but protrudes downward from the upper surface of the fork insertion part 6. It is also preferable to provide a gate for injecting the soft synthetic resin 3 in the fork non-slip portion 8 which is a portion of the non-slip member 5.

  Here, the anti-slip member 5 exemplified above is formed such that the load anti-slip part 7 is formed over the laminated anti-skid part 9 including the outer peripheral anti-skid part 9a and the inner anti-skid part 9b, and the fork insertion part 6 A cylindrical penetrating portion 16 is suspended from the portion of the inner anti-slip portion 9b located above the deck portion 4 through the deck portion 4 of the deck portion 4 in the thickness direction and extending over the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6. The bottom of the penetrating portion 16 is projected downward from the upper surface of the fork insertion portion 6, which is the lower surface of the deck portion 4, so as to form the fork non-slip portion 8. The cylindrical through-hole 16 is provided along the inner peripheral surface of the rib 11a and the laminated anti-slip part 9 is laminated on the upper surface of the deck part 4, and each is integrated by two-color molding. , With load anti-skid part 7 and fork anti-skid part 8 In addition, there is a portion extending over the top surface of the deck portion 4 and the top surface of the fork insertion portion 6, and at least a portion extending over the top surface of the deck portion 4 and the top surface of the fork insertion portion 6 is integrated with the deck portion 4 by two-color molding. If this is the case, the joint strength between the anti-slip member 5 and the deck portion 4 that can effectively withstand the impact when the load E or the fork F collides with the anti-slip member 5 is obtained as in the above example. Therefore, the shape of the non-slip member 5 and the arrangement form on the deck portion 4 can be variously designed and modified.

  For example, as shown in FIG. 11 (a), the shape of the laminated anti-slip part 9 that becomes the load anti-slip part 7 of the anti-slip member 5 is changed to a belt-like inner anti-slip part 9 b extending back and forth or left and right of the deck part 4. Are arranged in a stripe shape in a plan view at an appropriate interval so as to be formed integrally with the outer peripheral antiskid part 9a, or as shown in FIG. 11B, the antiskid member 5 having a shape along the outer periphery of the deck part 4 is formed. In addition, the non-slip members 5 formed in the shape of dots or islands are dispersedly arranged on the upper surface of the deck portion 4, or, as shown in FIG. In addition to the stopper member 5, a plurality of island-like anti-slip members 5 formed in an annular shape in plan view are arranged concentrically on the upper surface of the deck portion 4, or as shown in FIG. The shape of the laminated anti-slip part 9 that becomes the load anti-slip part 7 of the anti-slip member 5 is formed on the entire upper surface of the deck part 4. Preferably it is or formed so that. Here, the anti-slip member 5 has an impact mitigating effect when the load E is placed for the soft synthetic resin 3 and is provided on the entire upper surface of the deck portion 4 as shown in FIG. In some cases, the effect can be remarkably obtained. In addition, the part exposed to the upper surface of the deck part 4 of the non-slip member 5 is a shape that divides and surrounds the upper surface part of the deck part 4 as shown in this example or FIGS. In the case of the pallet 1 having the above, when this pallet 1 is used outdoors, there is a possibility that rainwater may accumulate on the upper surface portion of the deck portion 4 surrounded by the anti-slip member 5, so measures against this rainwater should be taken. It is also preferable to apply. As measures against this rainwater, for example, a notch for escaping the rainwater is provided at an appropriate position on the top surface of the deck portion 4 of the non-slip member 5 that surrounds the top surface portion of the deck portion 4, or a slip that serves as a dam for rainwater is provided. For example, providing a through-hole penetrating the deck portion 4 in the vicinity of the stopper member 5 can be mentioned.

  Further, as shown in FIGS. 12 (a) and 12 (b), a portion extending between the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6 of the anti-slip member 5 is located on the inner peripheral portion of the annular rib 11a. A solid penetrating portion 16a integrated by color molding is used, or as shown in FIG. 12 (c), a portion extending between the upper surface of the deck portion 4 and the upper surface of the fork insertion portion 6 is 4 is formed so as to wrap around the outer edge of the deck 4 and integrated by two-color molding along the outer edge of the deck section 4, and as shown in FIG. 12 (d), the upper surface of the deck section 4 and the fork It is also preferable that the portion extending over the upper surface of the insertion portion 6 is constituted by a plate-like through portion 16b integrated by two-color molding along the plate-like rib 11b. The pallet 1 shown in the accompanying drawings is formed by welding the pallet upper half 1a and the pallet lower half 1b, but the present invention is a pallet constituted only by the pallet upper half 1a. Needless to say, the pallet 1 can be applied to the pallet 1 formed by two-color molding of the hard synthetic resin 2 and the soft synthetic resin 3.

The state at the time of the loading operation | work of the load in the example of embodiment of this invention and the insertion of a fork is shown, (a) is a sectional side view (the BB line of FIG. 3) of a load and a fork slide direction. (B) is a side cross-sectional view (cross-sectional view taken along the line CC in FIG. 3) of a surface orthogonal to the sliding direction of the load and the fork. It is a perspective view of a pallet same as the above. It is a top view of a pallet same as the above. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is a bottom view of a pallet upper half same as the above. It is sectional drawing in the AA line of FIG. 3 of a pallet upper half same as the above. It is a schematic perspective view of the movable mold | die of the shaping die apparatus of a pallet same as the above. It is sectional drawing which fractured | ruptured partially of the shaping die apparatus same as the above. (A) (b) (c) (d) is explanatory drawing which shows the order which shape | molds a pallet same as the above with a shaping die apparatus. It is a sectional side view of the principal part of the pallet of the other example of embodiment of this invention. (A) (b) (c) (d) is a top view of the pallet of each example which is another example of embodiment of this invention. (A) (b) (c) (d) is a sectional side view of the principal part of each pallet of each example which is another example of the embodiment of the present invention. It is a sectional side view of the principal part of the example of background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pallet 2 Hard synthetic resin 3 Soft synthetic resin 4 Deck part 5 Non-slip member 6 Fork insertion part 7 Loaded article non-slip part 8 Fork non-slip part 9 Laminated non-slip part 10 Loaded article mounting part 11 Rib 11a Annular rib 16 Through Part E Load F Fork

Claims (4)

At least the upper surface portion of the pallet is formed by two-color molding of a hard synthetic resin and a soft synthetic resin, and the upper surface portion is a deck portion having a fork insertion portion formed of a hard synthetic resin, and a deck portion. A non-slip member molded with soft synthetic resin over the top surface of the fork insertion portion and the top surface of the fork insertion portion, and the top of the anti-slip member protrudes above the top surface of the deck portion to form a load anti-slip portion In addition, the pallet is characterized in that the lower part of the anti-slip member protrudes downward from the upper surface of the fork insertion part to form the fork anti-slip part. At least one of the anti-load member or the fork anti-slip part of the anti-slip member is provided with a laminated anti-slip part integrated and laminated by two-color molding along the upper surface of the deck part or the upper surface of the fork insertion part. The pallet according to claim 1. At least one of the exposed portions on the upper surface or the lower surface of the anti-slip member, and a part of the exposed portion protrudes upward or downward from the upper surface of the deck portion or the upper surface of the fork insertion portion, and the load anti-slip portion or fork anti-slip portion And another part of the exposed portion is made to be flush with the upper surface of the deck portion or the upper surface of the fork insertion portion through a boundary between the anti-slip member and the deck portion. The pallet according to 1. A large number of reinforcing ribs are suspended downward from the load placing portion on which the load is placed on the upper surface to form a deck portion, and the non-slip member is disposed along the rib hanging from the load placing portion. It is integrated by color molding, and the thickness of the laminated anti-slip part of the anti-slip member is made thinner than the thickness of the rib and the part of the anti-slip member integrated along the rib. Item 2. The pallet according to Item 2.

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