JP5554280B2 - Work protection member and work transfer unit - Google Patents

Description

  The present invention relates to a workpiece protection member used when a substantially rectangular plate-shaped workpiece is conveyed, and a workpiece conveyance unit using the protection member.

  Conventionally, when a work is placed on a pallet that can be transported by a forklift or the like and transported or stored, the work is accommodated to prevent the work from falling off or to be protected. It is known to use installed trays. In addition, when the work has a substantially rectangular plate shape, there is a technique of holding the work by attaching a protective member that can individually support the four corners of the work to the pallet (for example, Patent Document 1). reference.).

  In this technology, the protection members are configured so that they can be stacked (stacked) one above the other. By using such a protective member, it becomes possible to carry and store workpieces stacked one above the other. This improves transportation and storage efficiency, and saves resources, lowers costs, and saves storage space when not in use, compared to a tray that accommodates the entire workpiece. be able to.

JP 2006-32978 A

  By the way, it is necessary to fix to the pallet in order to prevent the positional displacement of the protective member that is supported in direct contact with the pallet. In this case, in order to prevent the work of fixing the protective member to the pallet in advance, the protective member is generally installed at a slightly wider interval than the outer size of the work, taking into account tolerances of itself and the work. Is done.

  However, in such an installation mode, there is a concern that a relatively large gap may be formed between the protective member supporting the four corners of the workpiece and the outer peripheral surface of the workpiece. That is, there is a concern that there is room for the workpiece to move greatly between the protective members, and in some cases, the workpiece and the protective member collide during transportation or the like, and the workpiece is damaged due to this. May be incurred.

  Furthermore, when the conventional protection members are stacked, one protection member cannot be moved relative to another protection member in the horizontal direction. For this reason, when the lowermost protection member is misaligned, the above-described movement of the workpiece can occur in all stages.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a workpiece protection member and a workpiece conveyance unit that can more reliably protect the workpiece during conveyance or the like. is there.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. It is a protective member that can be supported in a state where the work is separated from the installation surface by being installed corresponding to each of the four corners of the work having a substantially rectangular plate shape,
A placement unit capable of supporting the lower surface of one corner of the workpiece;
A support convex part protruding upward from a part of the outer peripheral edge of the mounting part and having a substantially L shape in plan view;
In the stacked state of the protective members in which the protective members are stacked in the same direction above the protective member on which the workpiece is placed on the mounting portion, the upper surface of the supporting convex portion of the lower protective member is supported and supported. A supported part;
In the stacked state of the protective members, a positioning portion facing the inner peripheral side surface of the support convex portion of the lower protective member;
Projecting downward from the mounting portion, and in the stacked state of the protection members, two side portions extending substantially orthogonal to each other on the outer peripheral surface of the work placed on the mounting portion of the lower protection member. Each having a locking means configured to be able to contact,
In the stacked state of the protective members, the upper protective member is positioned at a position where the positioning portion and the inner surface of the support convex portion of the lower protective member are in contact with each other, in front of the locking means and the lower protective member. A workpiece protective member configured to be displaceable between a position where an outer peripheral surface of a workpiece placed on the placement portion contacts.

  According to the means 1, in the stacked state of the protective members, the upper protective member has a position where the positioning portion and the inner surface of the support convex portion of the lower protective member abut, the locking means and the lower protective member. It is configured to be displaceable between a position where the outer peripheral surface of the work placed on the placement portion of the member contacts. In other words, even if the lowermost (lowermost) protection member is installed at a slightly wider interval than the outer peripheral shape (outer dimension) of the workpiece, the protection (second step) is stacked on the protective member. The member can be installed so that the locking means abuts on the outer peripheral surface of the workpiece placed on the lowermost protection member. Thereby, the clearance gap between the outer peripheral surface of a workpiece | work and a protection member can be eliminated, and malfunctions, such as a workpiece | work colliding with a protection member and damaging a workpiece | work etc., can be suppressed.

  In addition, since the lowermost protective member can be installed at a slightly wider interval than the outer peripheral shape of the workpiece, it is determined that the workpiece cannot be installed after the lowermost protective member is fixed to the pallet, etc. It is possible to avoid situations such as redoing the work or arranging the lowermost protective member while matching the outer peripheral shape of the actual work after the work is placed on the pallet or the like. Therefore, workability can be dramatically improved.

  In addition, by using a fixing means such as a fixing band in order to prevent displacement of the upper protection member, a state in which there is no gap between the outer peripheral surface of the workpiece and the protection member is more reliably maintained, and the horizontal position of the workpiece The effect of preventing positional displacement in the direction is more reliably exhibited. Further, “in the stacked state of the protective members, even if the locking means of the upper protective member and the outer peripheral surface of the workpiece placed on the mounting portion of the lower protective member are in contact with each other, The supported portion of the upper protective member and the upper surface of the supporting convex portion of the lower protective member may be in contact with each other. In this case, in the stacked state, the protective member is brought into direct contact with each other in the vertical direction, so that the effect of reducing the load applied to the workpiece is reliably achieved.

  Mean 2. Provided with an auxiliary leg that can contact the upper surface of the workpiece when the locking means is in contact with the outer peripheral surface of the workpiece and faces the upper surface of the workpiece and at least when the workpiece and the protective member are relatively inclined. The workpiece protective member according to means 1, wherein the workpiece protective member is provided.

  According to the means 2, even if the protective member is tilted and displaced toward the inner peripheral side of the workpiece, the auxiliary leg portion can be prevented from being tilted further by contacting and stretching on the upper surface of the workpiece. Moreover, the rigidity of the protection member is increased by the auxiliary leg portion, and deformation of the protection member itself can be suppressed. Therefore, for example, even if the protective member is prevented from being displaced using a fixing band or the like that can bind the stacked protective members, the protective member can be reliably prevented from falling down. . Furthermore, it is possible to prevent the workpiece from being lifted by the auxiliary leg portion.

Means 3. The support convex portion includes an outer support portion that contacts the supported portion of the upper protection member in a stacked state of the protection members, and an inner support portion that contacts or approaches the lower surface of the positioning portion of the upper protection member. With
The inner support portion of the protective member installed so that the locking means comes into contact with the outer peripheral surface of the workpiece substantially contacts the outer peripheral surface of the workpiece placed on the placement portion of the protective member. The workpiece protective member according to 1 or 2 above.

  According to the means 3, it is possible to position the work placed on the placement portion by the inner support portion of the support convex portion, and it is possible to improve workability when stacking the protective members. Further, in the stacked state of the protective members, when the lower surface of the positioning portion of the upper protective member and the upper surface of the inner support portion are in contact with each other, the area where the stacked protective members are in contact with each other may be increased. It is possible to achieve a sense of stability in the stacked state.

Means 4. The workpiece protective member according to any one of the above means 1 to 3,
A pallet that can be transported with a forklift,
In a state where a plurality of workpieces are stacked up and down with a protective member interposed on the pallet, the pallet includes a fixing means that is attached to at least the uppermost protective member and the pallet,
In the pallet, displacement of the protective member in the direction away from the workpiece in the horizontal direction is restricted so that the mounting surface of the mounting portion is horizontal in a portion corresponding to the four corners of the workpiece. It has a mounting part that can be mounted as
A workpiece transport unit, wherein a protection member is attached to each of the attachment portions, so that the protection member is arranged at an interval slightly larger than the outer dimension of the workpiece.

  According to the means 4, the displacement of the protective member can be prevented by the fixing means. For this reason, the state where the outer peripheral surface of the workpiece and the locking means of the protective member are in contact with each other can be more reliably maintained, the positional displacement of the workpiece in the horizontal direction is prevented, and the workpiece and the protective member collide. It is possible to wipe out the troubles. As a result, the workpiece is more reliably protected, and the workpiece can be transported more stably.

  In addition, by mounting the protective member to the mounting portion of the pallet, the mounting surface of the protective member mounting portion can be installed horizontally, and the movement of the protective member in the direction away from the workpiece is restricted. The workpiece can be more stably supported by the protective member. Furthermore, by attaching the protection member to each mounting part, the protection member is arranged at a slightly wider interval than the outer periphery shape of the workpiece, so the outer shape of the actual workpiece after the stage of placing the workpiece on the pallet etc. In the above-mentioned means 1, it is possible to avoid the situation that the protective member is arranged while adjusting each time, and the situation that the work cannot be installed after the protective member is fixed to the pallet or the like and the fixing work is performed again. The described effects are more reliably exhibited.

  Examples of the fixing means include a band for binding the protective member and the pallet, a pallet, a work, and a shrink film including the protective member. Of course, it is also possible to use a plurality of fixing means in combination. In particular, when a shrink film is used, even when the protective members are stacked, even if the locking means of the second to the uppermost protective member and the outer peripheral surface of each workpiece are spaced apart, the heat of the shrink film During the contraction, the protective member is displaced toward the inner peripheral side of the workpiece. For this reason, by packaging with a shrink film, not only can the work be protected, but also the stacking workability can be improved.

  When the protective member of the above means 2 is used, the protective members are stacked so as to cover the upper surfaces of the four corners of the uppermost workpiece, and the number of steps of the protective member is one more than the number of steps of the workpiece. It is good also as being done. In this case, it is possible to reliably prevent the uppermost workpiece from being lifted.

It is a perspective view which shows the upper surface side of a corner member. It is a perspective view which shows the upper surface side of a corner member. It is a perspective view which shows the lower surface side of a corner member. It is a perspective view which shows the lower surface side of a corner member. It is a perspective view which shows the workpiece | work and corner member, etc. which were stacked. It is an enlarged view which shows the J section of FIG. It is a model perspective view which shows a mode that the latching convex part contact | abutted to the workpiece outer peripheral surface. It is the sectional view on the AA line of FIG. It is an enlarged view which shows the K section of FIG. It is a perspective view which shows the K section of FIG. FIG. 6 is a sectional view taken along line B-B in FIG. 5. It is an enlarged view which shows the L section of FIG. It is a perspective view which shows the upper surface side of a workpiece conveyance unit. It is an enlarged view which shows the M section of FIG. It is a perspective view of a pallet. It is a perspective view of the corner member in another embodiment. It is a perspective view of the corner member in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 5, 13, and the like, a work transport unit 1 used for transport and storage of a substantially rectangular plate-shaped work W (for example, a solar panel) includes a pallet 2 that can be transported by a forklift, A corner member 3 is provided as a workpiece protection member that can be supported in a state of being separated from the installation surface (the upper surface of the pallet 2) by being attached to the pallet 2 corresponding to each of the four corners of the workpiece W. ing. In the present embodiment, the workpiece W is supported by the four corner members 3 respectively installed corresponding to the four corners of the workpiece W.

  As shown in FIGS. 1 to 4, the corner member 3 has a substantially fan shape (substantially quarter-circular shape) in a plan view, and a placement portion 11 that can be in contact with and supported by the lower surface of one corner portion of the workpiece W; And a frame portion 21 that protrudes upward along the outer peripheral edge of the mounting portion 11. Hereinafter, for the convenience of explanation, among the outer peripheral edges of the mounting portion 11, the side portions that are substantially orthogonal to each other and extend in a substantially linear shape are referred to as a first straight portion 12 and a second straight portion 13, and A side portion extending in an arc shape so as to connect the front end portions of the two straight line portions 13 is referred to as a curved portion 14 (see FIG. 1). The corner member 3 of this embodiment is integrally formed of polypropylene.

  The frame portion 21 is provided in a substantially L shape in plan view along the first straight portion 12 and the second straight portion 13 of the placement portion 11. The frame portion 21 has a thickness in the outer peripheral direction of the mounting portion 11 and has a step shape in which a lower portion of the inner wall portion that is the inner peripheral side of the mounting portion 11 bulges toward the inner peripheral side. Hereinafter, for convenience of explanation, a portion of the frame portion 21 that extends in a substantially L shape along the outer peripheral edge of the mounting portion 11 is referred to as an outer frame 22, is adjacent to the inner peripheral side of the outer frame 22, and A portion that is one step lower than the frame 22 is referred to as an inner frame 23. Further, as shown in FIGS. 9 and 10, reinforcing ribs 24 are provided on the inner side of the frame portion 21 to connect the surfaces facing each other in the outer circumferential direction of the placement portion 11. The corner member 3 has a symmetric shape with a vertical plane including a straight line passing through the corner portion of the frame portion 21 and the central portion of the curved portion 14 as a center.

  As shown in FIG. 3, FIG. 4, FIG. 9, and the like, a leg portion 31 that protrudes downward from the frame portion 21 is provided on the lower surface side of the placement portion 11. As shown in FIGS. 9, 10, etc., the leg portion 31 is an outer leg wall 32 formed by extending a wall portion constituting the outer peripheral surface of the frame portion 21 (the outer surface of the outer frame 22) downward. And an inner leg wall 33 formed so as to extend the wall portion constituting the inner side surface of the inner frame 23 downward, and a reinforcing rib 24 extended downwardly, An extension rib 34 that connects the leg wall 33 is provided. The lower edge portion of the outer leg wall 32 is located above the lower edge portion of the inner leg wall 33. In the present embodiment, the lower edge portion of the outer leg wall 32 and the inner leg wall 33 in the vertical direction. The distance between the upper edge of the outer frame 22 and the upper surface of the inner frame 23 is equal to the distance between the lower edge portion and the lower edge portion.

  Further, the lower edge of the extension rib 34 is at the same height as the lower edge of the outer leg wall 32. Further, a partition rib 35 is provided that extends downward along the outer peripheral surface of the inner leg wall 33 from a portion of the extension rib 34 on the inner peripheral side of the mounting portion 11. The lower edge of the partition rib 35 is at the same height as the lower edge of the inner leg wall 33. In addition, an edge on the outer peripheral side of the placement portion 11 (hereinafter referred to as an outer edge portion) of the partition rib 35 is an inner side surface of the outer frame 22 (the upper surface of the inner frame 23 and the outer edge) in the outer peripheral direction of the placement portion 11. It is the same position as the boundary portion with the inner surface of the frame 22.

  Therefore, as shown in FIGS. 6, 8 to 10, and the like, when the corner members 3 are stacked in the same direction (stacked), the upper surface of the outer frame 22 of the lower corner member 3 and the upper The lower edge portion of the extension rib 34 of the corner member 3 and the lower edge portion of the outer leg portion 31 come into contact with each other. Further, when the corner members 3 are stacked straight without being displaced, the upper surface of the inner frame 23 of the lower corner member 3, the lower edge of the partition rib 35 of the upper corner member 3, and the inner legs The lower edge of the wall 33 comes into contact. In addition, since the outer peripheral surface of the frame portion 21 extends substantially in the vertical direction, the inner side surface (inner peripheral side surface) of the outer frame 22 of the lower corner member 3 and the partition ribs 35 of the upper corner member 3 are arranged. When the outer edge abuts, the outer peripheral surface of the frame portion 21 of the lower corner member 3 and the outer peripheral surface of the leg portion 31 of the upper corner member 3 are substantially flush.

  In the present embodiment, the frame portion 21 (particularly the outer frame 22) constitutes a support convex portion, the outer frame 22 constitutes an outer support portion, and the inner frame 23 constitutes an inner support portion. Further, the leg portion 31 (particularly, the lower edge portion of the extension rib 34 and the outer leg wall 32) constitutes a supported portion, and the partition rib 35 (the outer edge portion thereof) constitutes a positioning portion. As shown in FIG. 1, the inner frame 23 is interrupted at the corner of the frame portion 21. However, as shown in FIGS. 3 and 4, the inner frame 23 is continuous with respect to the inner leg wall 33. As shown in FIG. 4, the corner portion of the leg portion 31 extends without interruption along the lower edge of the inner peripheral surface of the inner frame 23.

  As shown in FIG. 1 etc., the drooping wall part 41 extended downward from the curve part 14 of the mounting part 11 is provided. The lower edge portion of the drooping wall portion 41 is at the same height as the lower edge portion of the inner leg wall 33. In addition, the drooping wall portion 41 extends slightly inclined toward the outer peripheral side of the placement portion 11 toward the lower side. Both end portions of the frame portion 21 are closed by wall portions formed continuously with the drooping wall portion 41.

  Further, as shown in FIG. 4 and the like, the inner leg wall 33 and the drooping are provided on the outer peripheral side of the mounting portion 11 at each boundary portion between the lower edge portion of the inner leg wall 33 and the lower edge portion of the drooping wall portion 41. A pair of locking projections 43 protruding downward from the wall 41 is provided. Each locking projection 43 has a substantially rectangular parallelepiped shape opened upward, and the downward projection length of each locking projection 43 is the projection length of the inner frame 23 from the mounting portion 11 or the thickness of the workpiece W. (See FIG. 7, FIG. 9, FIG. 12, etc.). Furthermore, each latching convex part 43 is provided in the position remove | deviated from the outer frame 22 in planar view, and the outer frame 22 does not exist above the latching convex part 43. FIG. Therefore, as shown in FIG. 6, even when the corner members 3 are stacked, the engaging projection 43 of the upper corner member 3 does not interfere with the outer frame 22 of the lower corner member 3. And it will be located in the side of both the terminal parts of the outer frame 22 of the lower corner member 3. FIG. Therefore, the upper surface of the outer frame 22 of the lower corner member 3 and the lower edge portion of the extension rib 34 of the upper corner member 3 can be reliably brought into contact with each other.

  In addition, although a part of wall part which comprises the latching convex part 43 is continuously formed with the wall part which obstruct | occludes both the terminal parts of the frame part 21, it is the same as the drooping wall part 41 also about the said wall part. In this way, the horizontal position of the end surface of the frame portion 21 and the side surface of the locking projection 43 on the frame portion 21 side is shifted. In the present embodiment, the pair of locking projections 43 constitute locking means.

  Further, auxiliary leg portions 45 that connect the upper portions of the pair of locking projections 43 are provided. In other words, the locking convex portion 43 protrudes downward from both end portions of the auxiliary leg portion 45. The auxiliary leg portion 45 does not connect the pair of locking projections 43 linearly, but extends in an arc shape along the lower edge portion of the drooping wall portion 41. Further, the auxiliary leg portion 45 extends horizontally from the lower edge portion of the drooping wall portion 41 toward the outer peripheral side of the placement portion 11 until the tip edge is flush with the side surface of the locking projection portion 43. At the same time, the tip edge is slightly folded upward for reinforcement. In addition, the position of the lower surface of the auxiliary leg part 45 extended from the lower edge part of the drooping wall part 41 is the same height position as the lower edge part of the inner leg wall 33.

  As shown in FIG. 15, the pallet 2 has a substantially rectangular shape larger than the outer peripheral shape (outer dimension) of the workpiece W in plan view, and includes a fork insertion portion 51 into which a fork of a forklift can be inserted. Yes. The pallet 2 of this embodiment is wooden. Further, at the four corners of the upper surface of the pallet 2, there are provided mounting bases 52 as mounting portions protruding upward. The mounting base 52 has a substantially square plate shape and has a thickness equal to or greater than the protruding length of the locking projection 43 (the distance between the lower end of the locking projection 43 and the lower surface of the auxiliary leg 45 in the vertical direction). A plate 53 and a frame plate 54 provided along two sides of the base plate 53 on the outer peripheral side of the pallet 2 and projecting upward from the base plate 53 are provided. The inner peripheral edge and both end edges of the upper surface of the frame plate 54 have a shape corresponding to the upper surface shape of the outer frame 22, and the length of one side of the base plate 53 is the length of one side of the inner peripheral edge of the L-shaped frame plate 54. It is longer than that.

  As shown in FIGS. 6, 9, and 10, in a state where the corner member 3 is attached to the mounting base 52, the frame portion 21 is on the outer peripheral side of the pallet 2, and the auxiliary leg portion 45 is on the inner peripheral side of the pallet 2. In this direction, the inner leg wall 33, the partition rib 35, and the auxiliary leg portion 45 are placed on the base plate 53, the outer leg wall 32 and the extension rib 34 are placed on the frame plate 54, and the locking projection 43 is It is inserted into a recess formed by the outer peripheral surface of the base plate 53 and the outer peripheral surface of the frame plate 54 and comes into contact with the outer peripheral surfaces of the base plate 53 and the frame plate 54. That is, by placing the corner member 3 on the mounting base 52 formed in accordance with the step shape on the lower surface side of the corner member 3, the corner member 3 has the upper surface (mounting surface) of the mounting portion 11 substantially horizontal. As described above, the pair of locking projections 43 are positioned by the outer peripheral surfaces of the base plate 53 and the frame plate 54 while being supported by the mounting base 52. Further, when the auxiliary leg portion 45 abuts against the base plate 53, the tilting displacement of the corner member 3 toward the inner peripheral side of the pallet 2 is more reliably prevented. In addition, by providing the frame plate 54 that supports the extension rib 34 and the outer leg wall 32, it is possible to more reliably support the downward stress applied to the frame portion 21 (particularly the outer frame 22).

  Further, as shown in FIGS. 5, 8, 11, etc., the workpieces W are removed from the pallet 2 by the mounting portions 11 of the four corner members 3 by attaching the corner members 3 to all the four mounting bases 52. It becomes possible to support in a floating position. In the present embodiment, each mounting base 52 has a frame portion 21 (inner side surface of the inner frame 23) of the corner member 3 and an outer peripheral surface of the workpiece W when the workpiece W is placed on the corner member 3 attached thereto. It is provided in a position where a gap is formed between them.

  The corner member 3 is configured to regulate the displacement of the corner member 3 stacked on the upper side to the outer peripheral side of the pallet 2 (work W) in a state where the corner members 3 are stacked one above the other (the outer frame 22 and the partition). Although it is provided with respect to the abutment with the ribs 35, it does not have a configuration for restricting the displacement of the upper corner member 3 toward the inner peripheral side of the pallet 2. However, the corner member 3 of the present embodiment is provided with locking projections 43 protruding downward at both ends of the auxiliary leg portion 45. When the corner members 3 are stacked, the corner members 3 are shown in FIGS. As described above, the locking convex portion 43 of the upper corner member 3 faces the outer peripheral surface of the workpiece W placed on the placement portion 11 of the lower corner member 3. In particular, since the locking projections 43 are provided in a pair, when the corner members 3 are stacked, as shown in FIG. 7, between the pair of locking projections 43 of the upper corner member 3, the lower side The outer peripheral surface of the workpiece W placed on the lower corner member 3 with respect to the pair of locking projections 43 is shaped such that the workpiece W placed on the placement portion 11 of the corner member 3 enters. Two sides extending substantially orthogonal to each other are configured to be able to contact each other. For this reason, even if the corner member 3 is displaced toward the inner peripheral side of the pallet 2, the locking convex portion 43 comes into contact with the outer peripheral surface of the workpiece W, and further displacement is restricted. Therefore, the corner member 3 can be prevented from falling off only by having a configuration for preventing the corner member 3 stacked on the upper side from being displaced to the outer peripheral side only.

  By having such a configuration, the second-stage corner member 3 installed immediately above the lowermost (first-stage) corner member 3 attached to the mounting base 52 is the outer edge of all the partition ribs 35. Is in contact with the inner surface of the outer frame 22 of the lowermost corner member 3, and the lowermost stage (one step) in which the pair of locking projections 43 are both placed on the placement portion 11 of the lowermost corner member 3. It is possible to displace in the horizontal direction between the contact position with the outer peripheral surface of the workpiece W). Accordingly, even if a gap is formed between the frame portion 21 of the lowermost corner member 3 and the outer peripheral surface of the lowermost workpiece W, the outer peripheral surface of the lowermost workpiece W and the second corner The pair of locking projections 43 of the member 3 can be brought into contact with each other to eliminate the gap (see FIGS. 9 and 10).

  Note that the thickness of the outer frame 22 (the width of the upper surface of the outer frame 22 in the outer peripheral direction of the mounting portion 11) is the same as that of the lowermost corner member 3 when the corner member 3 is attached to the mounting base 52 of the pallet 2. In consideration of a gap that may be formed between the lowermost workpiece W placed on the corner member 3, the width is set to allow the gap. That is, even if the second-stage corner member 3 is displaced to the maximum extent toward the inner peripheral side of the pallet 2 with respect to the lowermost-stage corner member 3, the outer leg wall 32 of the second-stage corner member 3 is the lowermost corner. The width is set such that it does not come off the upper surface of the outer frame 22 of the member 3, and the contact state in the vertical direction between the leg portion 31 and the frame portion 21 of the upper and lower corner members 3 is maintained.

  The protruding length of the inner frame 23 of the present embodiment from the mounting portion 11 (the distance from the upper surface of the mounting portion 11 to the upper surface of the inner frame 23 in the vertical direction) is longer than the thickness of the workpiece W (slightly longer in this example). It has become. In the stacked state of the corner members 3, between the upper surface of the mounting portion 11 of the lower corner member 3 and the lower surfaces of the auxiliary leg portion 45 and the inner leg wall 33 of the upper corner member 3 in the vertical direction. Is equal to or greater than the thickness of the workpiece W. Accordingly, the upper surface of the frame portion 21 of the lower corner member 3 (the upper surfaces of the outer frame 22 and the inner frame 23) and the lower surface of the leg portion 31 of the upper corner member 3 (the outer leg wall 32, the extension rib 34, the partition). The rib 35 and the lower edge portion of the inner leg wall 33) can be reliably brought into contact with each other.

  Further, the lower surface of the auxiliary leg 45 and the lower edge of the inner leg wall 33 and the partition rib 35 are at the same height position, and in the stacked state, the upper surface of the mounting portion 11 of the lower corner member 3; The distance from the auxiliary leg portion 45 of the upper corner member 3 is slightly longer than the thickness of the workpiece W. That is, the auxiliary leg portion 45 extending between the pair of locking projections 43 is opposed to the upper surface of the workpiece W in the stacked state. For this reason, if at least the workpiece W and the corner member 3 are relatively inclined, the upper surface of the workpiece W and the lower surface of the auxiliary leg portion 45 come into contact (actually, they contact when stacked). . In addition, in the vertical direction, the distance between the upper surface of the mounting portion 11 of the lower corner member 3 and the lower surface of the locking convex portion 43 of the upper corner member 3 is less than the thickness of the workpiece W. . Thereby, the latching convex part 43 can be reliably made to oppose the outer peripheral surface of the workpiece | work W, and it can comprise so that contact | abutment is possible.

  Moreover, in this embodiment, the surface which can contact | abut the outer peripheral surface of the workpiece | work W among each latching convex part 43, and the inner surface of each inner frame 23 are on the virtual same plane extended in a perpendicular direction (substantially). In the stacked state, the contact surface of the locking projection 43 of the upper corner member 3 with the workpiece W, and the workpiece W of the inner frame 23 of the lower corner member 3 The abutment surface (inner surface) can be substantially flush with each other. For this reason, for example, when all the corner members 3 in the second stage are in contact with the outer peripheral surface of the lowermost workpiece W, the pair of locking projections 43 are When the second-stage work W is placed on the placement portion 11, the outer peripheral surface of the second-stage work W and the inner side surface of each inner frame 23 of the second-stage corner member 3 come to substantially contact each other. ing.

  Further, when the third-stage corner member 3 is stacked on the second-stage corner member 3, the pair of locking projections 43 of the third-stage corner member 3 can be formed into two stages simply by stacking. The outer edge of the partition rib 35 of the third-stage corner member 3 and the inner surface of the outer frame 22 of the second-stage corner member 3 are substantially in contact with the outer peripheral surface of the workpiece W of the eye. . Accordingly, the third corner member 3 is positioned so that there is no room for horizontal displacement at the time of stacking.

  In addition, as shown in FIG. 1 and the like, a concave band-hanging portion 26 is formed on the upper surface of the outer frame 22 of the frame portion 21. The banding portion 26 is a portion corresponding to each intermediate position of the first straight portion 12 and the second straight portion 13 in the outer frame 22 extending in a substantially L shape along the outer peripheral edge of the placement portion 11. 1 is formed in two places one by one. A fixed band 7 (to be described later) is hooked on the band hanging portion 26 in a state where the workpieces W are stacked, and the stacked corner members 3 are bundled together with the pallet 2.

  Next, a packing operation when the workpiece W is conveyed will be described. First, the corner member 3 is attached to each mounting base 52 of the pallet 2. Then, the workpiece | work W is installed so that a 4 corner lower surface may contact | abut the mounting part 11 of the four corner members 3. FIG. Furthermore, the corner member 3 is installed above each corner member 3. The corner member 3 placed on the upper side is such that the locking projection 43 does not contact the upper surface of the workpiece W (so that it is positioned on the outer circumferential side of the outer circumferential surface of the workpiece W) and the lower edge of the leg 31 Is installed so as to contact the upper surface of the frame portion 21 of the lower corner member 3 vertically. Then, the workpiece W is also placed on the placement portion 11 of the corner member 3.

  Thereafter, similarly, after the workpieces W are stacked in the desired number of stages with the corner members 3 interposed, the corner members 3 are installed so as to cover the upper four corners of the uppermost workpiece W. (See FIG. 13). Thereby, the number of steps of the corner member 3 is one step higher than the number of steps of the workpieces W stacked one above the other.

  Then, as shown in FIGS. 13 and 14, the fixing band 7 is mounted so that the corner members 3 and the pallets 2 stacked in a plurality of stages at four locations are bound. That is, the fixed band 7 is first hooked on the banding portion 26 of the uppermost corner member 3 of the corner member 3 and is extended as it is along the side portion of the workpiece W, so that the banding portion of the opposite corner member 3 is provided. Hang on 26. Further, the fixing band 7 is extended downward and passed through the inside of the fork insertion portion 51 of the pallet 2, and the fixing band 7 is first turned to the corner member 3 on which the fixing band 7 is hooked. Connect each other. This operation is repeated four times in total until the fixed band 7 extends along each side of the workpiece W while changing the pair of corner members 3 to be bound.

  At this time, by fixing the corner member 3 with the fixing band 7, a force toward the inner peripheral side of the workpiece W acts on the corner member 3 in the uppermost stage in particular, and there is room for displacement between the outer peripheral surface of the workpiece W. If there is, it will be displaced until it comes into contact with the outer peripheral surface of the work W on the inner peripheral side of the work W. As a result, the horizontal displacement of the uppermost work W is prevented. Further, since the corner member 3 is fixed by the fixing band 7, a downward force is also applied to the corner member 3, and the corner member 3 below the uppermost corner member 3 is the uppermost corner member. 3 and the pallet 2 are sandwiched between the pallet 2 and the pallet 2 so that the vertical movement is prevented and the horizontal movement is also suppressed.

  Further, by fixing the corner member 3 with the fixing band 7, the lower surface of the auxiliary leg portion 45 of the corner member 3 is pressed against the upper surface of the workpiece W. As a result, the workpiece W is vertically held between the placement portion 11 of the lower corner member 3 and the auxiliary leg portion 45 of the upper corner member 3, and the workpiece W is prevented from being lifted. ing. The work W is individually packaged, and the upper surface is configured not to be pressed directly against the auxiliary leg 45 of the corner member 3 at the four corners. Damage is prevented from occurring.

  In this embodiment, after mounting the fixed band 7, the stacked workpieces W and the corner members 3 are packaged by a shrink film (not shown). When the shrink film is thermally shrunk, the shrink film that shrinks with respect to the corner member 3 that has room to move to the inner peripheral side of the work W (there is a gap between the locking projection 43 and the outer peripheral surface of the work W). As a result, the workpiece W is displaced toward the inner peripheral side of the workpiece W (until the locking projection 43 comes into contact with the outer peripheral surface of the workpiece W). That is, when stacking the workpieces W and the corner members 3, the shrink film package can be formed even if the corner members 3 are not stacked one by one so that the locking projections 43 abut against the outer peripheral surface of the workpiece W. When completed, the engaging convex portion 43 of the corner portion 3 abuts on the outer peripheral surface of the workpiece W, and the displacement of the engaging convex portion 43 is regulated so that the outer peripheral surface of the workpiece W and the engaging convex portion 43 are in contact with each other. Is maintained.

  As described in detail above, according to the present embodiment, in the stacked state of the corner members 3, the upper corner member 3 is the outer edge of the partition rib 35 and the inner surface of the outer frame 22 of the lower corner member 3. And a position where the pair of locking projections 43 and a position where the outer peripheral surface of the workpiece W placed on the placement portion 11 of the lower corner member 3 abuts can be displaced. ing. In other words, even if the lowermost corner member 3 is installed at a slightly wider interval than the outer peripheral shape of the workpiece W, the second corner member 3 is connected to the locking projection 43 of the lowermost workpiece W. It can install so that it may contact | abut on an outer peripheral surface. Thereby, the clearance gap between the outer peripheral surface of the workpiece | work W and the corner member 3 can be eliminated, and malfunctions, such as the workpiece | work W and the corner member 3 colliding and damaging the workpiece | work W etc., can be suppressed.

  Further, since the lowermost corner member 3 can be installed at a slightly wider interval than the outer peripheral shape of the workpiece W, the workpiece W cannot be installed after the lowermost corner member 3 is fixed to the pallet 2. This avoids situations such as finding out and fixing work again, and arranging the lowermost corner member 3 while aligning with the outer peripheral shape of the actual work W after the work W is placed on the pallet 2. be able to. Therefore, workability can be dramatically improved.

  In addition, between the position where the second-stage corner member 3 abuts on the lowermost corner member 3 in the outer circumferential direction of the workpiece W and the position abutted on the workpiece W supported by the lowermost corner member 3 as described above. Even if displaced, the contact state between the lower edge of the extension rib 34 and the outer leg wall 32 of the upper corner member 3 and the upper surface of the outer frame 22 of the lower corner member 3 is maintained. Yes. For this reason, the effect of reducing the load added to the workpiece | work W is reliably show | played by making the corner members 3 contact | abut directly up and down in the stacked state.

  Furthermore, in this embodiment, it extends so that the upper part of a pair of latching convex part 43 may be connected, and the upper surface of the corner site | part of the workpiece | work W mounted in the lower corner member 3 in the stacked state Auxiliary legs 45 are provided in close proximity to each other. For this reason, even if the corner member 3 is tilted and displaced toward the inner periphery of the workpiece W, the tilting displacement of the auxiliary leg portion 45 can be prevented by contacting the upper surface of the workpiece W and stretching. Moreover, the rigidity of the corner member 3 is enhanced by the auxiliary leg portion 45, and deformation of the corner member 3 itself can be suppressed. Accordingly, even when the stacked corner members 3 are in a state in which the corner member 3 is prevented from being displaced using the fixing band 7 or the like, the corner members 3 can be reliably prevented from falling down. Further, the presence of the auxiliary leg portion 45 can prevent the workpiece W from being lifted.

  In addition, the auxiliary leg portion 45 does not extend straight so as to linearly connect the pair of locking projections 43, but on the inner peripheral side of the workpiece W than the pair of locking projections 43. Since it bulges out, the effects of preventing the corner member 3 from being tilted and preventing the workpiece W from being lifted up are more reliably exhibited. In addition, since the auxiliary leg portion 45 is formed in a curved shape, it is possible to suppress a situation in which stress is locally applied to the workpiece W when the auxiliary leg portion 45 is pressed against the workpiece W. .

  Further, the frame portion 21 abuts the lower edge portion of the extension rib 34 of the upper corner member 3 in the stacked state, and the outer frame 22 capable of contacting the outer edge portion of the partition rib 35 of the upper corner member 3. In addition, the inner frame 23 is formed so as to bulge from the lower portion of the inner side surface of the outer frame 22 toward the inner peripheral side of the mounting portion 11. And when the corner member 3 is installed so that a pair of latching convex part 43 may contact | abut to the outer peripheral surface of the workpiece | work W, the inner frame 23 of the said corner member 3 will be in the mounting part 11 of the said corner member 3. The outer peripheral surface of the work W placed is substantially in contact with the outer peripheral surface. That is, when the respective locking projections 43 of all four corner members 3 provided corresponding to the four corners of the workpiece W are in contact with the outer peripheral surface of the workpiece W, the upper side (the four Only a space in which the workpiece W and the corner member 3 can be accommodated almost exactly is formed on the inner peripheral side of the frame portion 21 of the corner member 3. For this reason, if there is no inner frame 23 and the configuration is such that the position of the workpiece W can be displaced, there is a concern that it is necessary to align the workpiece W in order to stack the corner members 3. If there is 23, the workpiece W placed on the placement portion 11 can be positioned, and workability when stacking the corner members 3 can be improved. Further, in the stacked state of the corner members 3, the upper surface of the inner frame 23 is also in contact with the lower edge of the partition rib 35 of the upper corner member 3, so that the stacked corner members 3 are arranged vertically. The contact area can be increased, and a sense of stability in the stacked state can be achieved.

  The workpieces W stacked on the pallet 2 with the corner member 3 interposed therebetween are fixed by a fixing band 7 that binds the corner member 3 and the pallet 2 and packaged with a shrink film. For this reason, the displacement of each corner member 3 is prevented, and the state in which the locking projection 43 of the corner member 3 and the outer peripheral surface of the corresponding workpiece W are in contact with each other can be more reliably maintained. Therefore, the position shift of the workpiece W in the horizontal direction is prevented, and problems such as collision between the workpiece W and the corner member 3 can be eliminated. As a result, the workpiece W is more reliably protected, and the workpiece W can be transported more stably.

  In addition, the number of steps of the corner member 3 is one step higher than the number of steps of the workpiece W, and the upper surfaces of the four corners of the uppermost workpiece W are covered with the uppermost corner member 3. For this reason, it is possible to prevent the workpieces W in all stages from being lifted.

  Further, when the fixing band 7 is attached or the shrink film is thermally contracted, a force that compresses the inner side of the workpiece W acts on the stacked corner members 3. For this reason, even if it does not install the corner member 3 one by one in the stacking operation so that the engaging projection 43 contacts the outer peripheral surface of the workpiece W, the corner member 3 is formed on the outer peripheral surface of each workpiece W at the stage of packing. It can be set as the state which the latching convex part 43 contact | abutted. Therefore, workability can be improved.

  Further, by mounting the corner member 3 to the mounting base 52 of the pallet 2, the mounting surface of the mounting portion 11 of the corner member 3 can be installed horizontally and the movement of the corner member 3 in the horizontal direction is restricted. Therefore, the workpiece W can be more stably supported by the corner member 3. Furthermore, by attaching the corner members 3 to the respective mounting bases 52, the corner members 3 are arranged at a slightly wider interval than the outer peripheral shape (outer dimension) of the workpiece W, so that the actual workpiece W shape is adjusted one by one. The above-described effects such as arranging the corner member 3 and avoiding re-fixing the corner member 3 can be achieved more reliably.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) The shape of the corner member 3 is not specifically limited, The mounting part 11 which supports the workpiece | work W, and the support convex part (frame part 21) which protrudes upwards from a part of outer periphery of the mounting part 11 are shown. ), A supported portion (such as the extension rib 34 of the leg portion 31) supported by the supporting convex portion of the lower corner member 3 during stacking, and the supporting convex portion of the lower corner member 3 during stacking Positioning part (partition ribs 35 of the leg part 31) that can be in contact with the side surface and latching that can be in contact with two different sides of the outer peripheral surface of the work W placed on the lower corner member 3 during stacking What is necessary is just to provide the convex part 43. FIG. For example, you may comprise as shown in FIG.16 and FIG.17.

  Moreover, in the said embodiment, although the latching means is comprised by a pair of latching convex part 43, you may comprise by one protrusion formed in planar view substantially L shape. Furthermore, although the inner frame 23 of the frame portion 21 may be omitted, the workpiece W placed on the placement portion 11 can be positioned, or the upper and lower contact areas of the stacked corner members 3 can be determined. It is desirable to provide it. In addition, the band-hanging portion 26 can be omitted. However, when the fixed band 7 is used, the fixed band 7 is held at a suitable position (a position having a high strength and a well-balanced position). It is desirable to provide in. In addition, although it is possible to simplify or omit the drooping wall portion 41, it is desirable to provide the corner member 3 in order to ensure the strength of the corner member 3 and to use the fixing band 7. In this case, it is desirable that the hanging wall portion 41 is provided between the placement portion 11 and the auxiliary leg portion 45 at least corresponding to the position where the fixing band 7 extends immediately above.

  In addition, in the said embodiment, although the corner member 3 is comprised with the polypropylene, you may comprise with another raw material. For example, you may comprise with other resin materials, such as polyethylene, PET, and polyamide.

  (B) The workpiece W may be of a substantially rectangular plate shape, and an accessory component may be provided for the plate-shaped main body. For example, when a solar panel is transported as a work, it is placed on the corner member 3 with the back side of the panel body provided with wiring or the like facing upward. Furthermore, if the workpieces W are stacked on the upper side while interposing the corner member 3 having the leg portion 31 and the hanging wall portion 41, a sufficient space for accommodating wiring or the like can be secured between the upper and lower panel bodies. A plurality of workpieces W can be suitably stacked.

  In addition, the extension length of the leg part 31 and the drooping wall part 41 can be changed as appropriate depending on how much space needs to be secured between the upper and lower workpieces W. If it is W, the drooping wall portion 41 may be omitted, the leg portion 31 may be shortened, and the locking convex portion 43 may protrude downward from the height of the lower surface of the placement portion 11.

  (C) In the above embodiment, the mounting base 52 that can prevent the displacement in the horizontal direction by locking the locking projection 43 is employed as the mounting portion for attaching the corner member 3 to the pallet 2. However, any configuration may be used as long as the placement surface of the placement portion 11 of the corner member 3 is installed horizontally and the displacement of the workpiece W toward the outer peripheral side can be regulated. For example, a mounting base configured to allow displacement toward the inner peripheral side of the pallet 2 (which can be horizontally slidably mounted) may be used, or the corner member 3 may be locked to the upper surface of the pallet 2 instead of the mounting base. You may comprise so that the recessed part or opening part which can insert the convex part 43 can be formed, and the latching convex part 43 can be hooked. Further, it may be separately fixed to the pallet 2 with screws or the like, or the installation position of the mounting base 52 with respect to the pallet 2 may be appropriately adjusted. The pallet 2 may be made of resin instead of wooden.

  (D) In the above embodiment, the corner member 3 is installed so as to cover the upper four corners of the uppermost workpiece W, and the number of steps of the corner member 3 is increased by one more than the number of steps of the workpiece W. However, the same number of stages may be used. That is, when the work W is placed on the mounting portion 11 of the corner member 3 in which the pair of locking projections 43 are in contact with the outer peripheral surface of the work W, the outer peripheral surface of the work W and the inner frame 23 of the frame portion 21. Is substantially in contact with the inner surface. That is, the uppermost workpiece W is prevented from being displaced in the horizontal direction by the corner member 3 on which the uppermost workpiece W is placed, without installing the corner member 3 covering the upper four corners of the workpiece W. be able to. However, in order to prevent the uppermost workpiece W from being lifted, it is desirable to provide corner members 3 that press the upper surfaces of the four corners of the workpiece W.

  Moreover, in the said embodiment, although the displacement of the corner member 3 and the workpiece | work W is prevented using the fixed band 7 and the shrink film, you may use only one or a corner member with another member. The displacement of 3 may be prevented. Furthermore, in the said embodiment, although it is actualized when the workpiece | work W is piled up and conveyed in multiple steps, when not only the case where several workpiece | work W is piled up and down and conveyed, but one workpiece | work W is conveyed. (In this case, the corner member 3 has two steps). In addition, for example, the workpieces W can be stacked up and down in two rows on one pallet 2. That is, for example, in the case of a rectangular plate-like workpiece having an area half the size of the workpiece W of the above-described embodiment, the same corner member 3 is used to install the workpiece 2 by simply installing four mounting bases 52. Can be stacked in rows.

  DESCRIPTION OF SYMBOLS 1 ... Work conveyance unit, 2 ... Pallet, 3 ... Corner member, 11 ... Mounting part, 21 ... Frame part, 22 ... Outer frame, 23 ... Inner frame, 31 ... Leg part, 32 ... Outer leg wall, 33 ... Inside Leg wall, 34 ... extension rib, 35 ... screen rib, 43 ... locking projection, 45 ... auxiliary leg, 52 ... mounting base, W ... workpiece.

Claims (4)

It is a protective member that can be supported in a state where the work is separated from the installation surface by being installed corresponding to each of the four corners of the work having a substantially rectangular plate shape,
A placement unit capable of supporting the lower surface of one corner of the workpiece;
A support convex part protruding upward from a part of the outer peripheral edge of the mounting part and having a substantially L shape in plan view;
In the stacked state of the protective members in which the protective members are stacked in the same direction above the protective member on which the workpiece is placed on the mounting portion, the upper surface of the supporting convex portion of the lower protective member is supported and supported. A supported part;
In the stacked state of the protective members, a positioning portion facing the inner peripheral side surface of the support convex portion of the lower protective member;
Projecting downward from the mounting portion, and in the stacked state of the protection members, two side portions extending substantially orthogonal to each other on the outer peripheral surface of the work placed on the mounting portion of the lower protection member. Each having a locking means configured to be able to contact,
In the stacked state of the protective members, the upper protective member is positioned at a position where the positioning portion and the inner surface of the support convex portion of the lower protective member are in contact with each other, in front of the locking means and the lower protective member. A workpiece protective member configured to be displaceable between a position where an outer peripheral surface of a workpiece placed on the placement portion contacts.   Provided with an auxiliary leg that can contact the upper surface of the workpiece when the locking means is in contact with the outer peripheral surface of the workpiece and faces the upper surface of the workpiece and at least when the workpiece and the protective member are relatively inclined. The workpiece protection member according to claim 1, wherein the workpiece protection member is provided. The support convex portion includes an outer support portion that contacts the supported portion of the upper protection member in a stacked state of the protection members, and an inner support portion that contacts or approaches the lower surface of the positioning portion of the upper protection member. With
The inner support portion of the protective member installed so that the locking means comes into contact with the outer peripheral surface of the workpiece substantially contacts the outer peripheral surface of the workpiece placed on the placement portion of the protective member. The workpiece protection member according to claim 1 or 2. The workpiece protection member according to any one of claims 1 to 3,
A pallet that can be transported with a forklift,
In a state where a plurality of workpieces are stacked up and down with a protective member interposed on the pallet, the pallet includes a fixing means that is attached to at least the uppermost protective member and the pallet,
In the pallet, displacement of the protective member in the direction away from the workpiece in the horizontal direction is restricted so that the mounting surface of the mounting portion is horizontal in a portion corresponding to the four corners of the workpiece. It has a mounting part that can be mounted as
A workpiece transport unit, wherein a protection member is attached to each of the attachment portions, so that the protection member is arranged at an interval slightly larger than the outer dimension of the workpiece.

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