JP2011042373A - Cushioning member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a cushioning member by providing a structure in which a plate-like part 20 whose length (thickness) in the x-axial direction is shorter (thinner) than those of leg parts 543 and 544. <P>SOLUTION: The cushioning member 16b is arranged between an end face of an article to be packed having a longitudinal direction in the x-axial direction and the inner peripheral face of a packing box for storing the article to be packed. A plate-like part 20 opposes the end face of the article to be packed. The plate-like part 20 is provided with a slit SL 11 composed by a hole penetrating through the plate-like part 20 in the x-axial direction, and having a L-shaped track projecting to a point e side to a straight line l1 having points a and b as both ends and connecting a and b when seen in plan view from the x-axial direction. The end face of the article to be packed is brought into contact with the plate-like part 20 in a region A1 surrounded by the straight line l1 and the slit SL11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a buffer member, and more particularly, to a buffer member disposed between an object to be packed and an inner peripheral surface of a packing box in which the object to be packed is accommodated.

  As a conventional buffer member, a buffer member described in Patent Document 1 is known. FIG. 7 is a diagram showing the buffer members 542L and 542R, the covers 541L and 541R, the image forming cartridge 521, and the packing material 545 described in Patent Document 1.

  Covers 541L and 541R made of plastic are attached to both ends of the image forming cartridge 521 in the longitudinal direction of the image forming cartridge 521. Further, the buffer members 542L and 542R are attached to the image forming cartridge 521 so as to cover the covers 541L and 541R. The buffer members 542L and 542R serve to prevent the image forming cartridge 521 from being damaged when the image forming cartridge 521 moves in the packing material 545, and also to absorb external shocks. Therefore, the buffer members 542L and 542R are formed of a foamed polystyrene having excellent shock absorption, and include two legs 543 extending in the longitudinal direction of the image forming cartridge 521 and two legs 544 shorter than the legs 543. . The image forming cartridge 521 to which the buffer members 542L and 542R are attached is accommodated in a hexahedral packing material 545 having a trapezoidal surface.

  According to the buffer members 542L and 542R as described above, the impact when the packing material 545 is dropped can be absorbed by the legs 543 and 544 of the buffer members 542L and 542R. For example, when the longitudinal direction of the packing material 545 coincides with the vertical direction and the buffer member 542R falls in a state of being located below the buffer member 542L, the legs 543, 544 of the buffer member 542R are: Absorbs shock by compressing and / or bending. Accordingly, the buffer member 542R prevents an impact from being transmitted to the image forming cartridge 521.

  Incidentally, in the buffer members 542L and 542R described in Patent Document 1, the leg portions 543 and 544 extend in the longitudinal direction of the image forming cartridge 521. Therefore, the buffer members 542L and 542R have a problem that the buffer members 542L and 542R increase in size in the longitudinal direction of the image forming cartridge 521.

JP 2008-260556 A

  Therefore, an object of the present invention is to reduce the size of the buffer member.

  The shock-absorbing member according to one aspect of the present invention is disposed between a longitudinal end portion of an object to be packed having a longitudinal direction in a predetermined direction and an inner peripheral surface of a first packing box that accommodates the object to be packed. And a plate-like portion that faces an end portion in the longitudinal direction of the object to be packed, and the plate-like portion includes a hole that penetrates the plate-like portion in the predetermined direction. The first slit and the second point, when viewed in plan from the predetermined direction, the first point and the second point as both ends, and connecting the first point and the second point A first slit having a trajectory protruding in one direction with respect to the straight line is provided, and an end portion in the longitudinal direction of the packaged object is in a region surrounded by the straight line and the first slit. The plate-like portion is in contact with the plate-like portion.

  According to the present invention, the buffer member can be downsized.

It is the external appearance perspective view which showed a mode that the image development apparatus was accommodated in a packing box. Fig.2 (a) is the external appearance perspective view which showed a mode that the packaging box was accommodated in a packaging box. FIG. 2B is an external perspective view of the packaging box in which the packaging box is accommodated. It is an external appearance perspective view of a buffer member. Fig.4 (a) is the figure which planarly viewed the buffer member from the negative direction side of the x-axis direction. FIG. 4B is a plan view of the buffer member from the positive direction side in the x-axis direction. FIG. 5A is a cross-sectional structure view taken along line AA of FIG. 4B when no impact is applied. FIG. 5B is a cross-sectional structure diagram along AA in FIG. 4B when an impact is applied. It is a cross-section figure of the buffer member concerning a modification. It is the figure which showed the buffer member, cover, image-forming cartridge, and packing material of patent document 1.

  A buffer member according to an embodiment of the present invention will be described below with reference to the drawings.

(Composition of buffer member)
Below, the structure of the buffer member which concerns on one Embodiment of this invention is demonstrated, referring drawings. FIG. 1 is an external perspective view showing a state in which the developing device 2 is accommodated in the packing box 14. FIG. 2A is an external perspective view showing how the packing box 14 is accommodated in the packing box 18. FIG. 2B is an external perspective view of the packaging box 18 in which the packaging box 14 is accommodated. In the present embodiment, the longitudinal direction of the developing device 2 is defined as the x-axis direction. Further, the height direction of the packing box 14 made of a rectangular parallelepiped is defined as the z-axis direction, and the direction orthogonal to the x-axis direction and the z-axis direction is defined as the y-axis direction.

  FIG. 1 shows a developing device (electronic device) 2, a bag 4, buffer members 6, 8, 10, 12 and a packing box 14. The developing device 2 is a device that applies a developer to a photosensitive drum in an image forming apparatus such as a printer or an MFP. As shown in FIG. 1, the developing device 2 has a longitudinal direction in the x-axis direction. The configuration of the developing device 2 is the same as the configuration of the developing device of a general image forming apparatus, and thus detailed description thereof is omitted.

  The bag 4 is a bag made of, for example, polyethylene, and has a size that can accommodate the developing device 2. The developing device 2 is accommodated in the bag 4. As shown in FIGS. 1 and 2A, the packaging box 14 is a cardboard box that forms a rectangular parallelepiped having a longitudinal direction in the x-axis direction with the lid closed. The packaging box 14 includes end surfaces S11 and S12, side surfaces S13 and S14, a bottom surface S15, and an upper surface S16. Specifically, the end surface S11 is a surface located on the negative direction side in the x-axis direction of the packaging box 14, and the end surface S12 is a surface located on the positive direction side in the x-axis direction of the packaging box 14. The side surface S13 is a surface located on the negative direction side in the y-axis direction of the packaging box 14, and the side surface S14 is a surface located on the positive direction side in the y-axis direction of the packaging box 14. The bottom surface S15 is a surface located on the negative side in the z-axis direction of the packaging box 14, and the top surface S16 is a surface located on the positive direction side in the z-axis direction of the packaging box 14.

  As shown in FIG. 1, the buffer members 6, 8, 10, and 12 are provided between the developing device 2 accommodated in the bag 4 and the inner peripheral surface of the packaging box 14, and an impact caused by dropping or the like is applied to the developing device. It plays the role of preventing transmission to 2. Therefore, the buffer members 6, 8, 10, and 12 are made of an elastic body that easily absorbs an impact (for example, a foam cushioning material having a wide elastic region such as foamed polypropylene or foamed polyethylene). The buffer member 6 is attached to the end of the developing device 2 on the negative direction side in the x-axis direction from the positive direction side in the z-axis direction. The buffer member 8 is attached to the end of the developing device 2 on the negative side in the x-axis direction from the negative direction side in the z-axis direction. The buffer member 10 is attached to the end of the developing device 2 on the positive direction side in the x-axis direction from the positive direction side in the z-axis direction. The buffer member 12 is attached to the end of the developing device 2 on the positive direction side in the x-axis direction from the negative direction side in the z-axis direction. Thus, by attaching the buffer members 6, 8, 10, 12 to the developing device 2, the developing device 2 is fixed in the packaging box 14 by the buffer members 6, 8, 10, 12. As a result, the movement of the developing device 2 in the packing box 14 is restricted.

  When the developing device 2, the bag 4, and the buffer members 6, 8, 10, 12 are accommodated in the packing box 14, the lid of the packing box 14 is closed as shown in FIG. The lid of the packaging box 14 is sealed with tape or the like. Hereinafter, the packaging box 14 in which the developing device 2, the bag 4, and the buffer members 6, 8, 10, and 12 are packaged is referred to as an article 15 to be packed. Similar to the packaging box 14, the packaged item 15 has a longitudinal direction in the x-axis direction.

  In FIG. 2A, an article 15 to be packed, buffer members 16a and 16b, and a packing box 18 are shown. When the lid is closed, the packaging box 18 is a cardboard box having a hexahedron having a longitudinal direction in the x-axis direction, and accommodates the article 15 and the buffer members 16a and 16b. The packaging box 18 includes end surfaces S1 and S2, side surfaces S3 and S4, a bottom surface S5, and an upper surface S6. Specifically, the bottom surface S5 is a surface located on the negative side in the z-axis direction of the packaging box 18, and the top surface S6 is a surface located on the positive direction side in the z-axis direction of the packaging box 18. The bottom surface S5 and the top surface S6 are parallel to each other and both form the same parallelogram. The end surface S1 is a surface located on the negative direction side of the packaging box 18 in the x-axis direction, and the end surface S2 is a surface located on the positive direction side of the packaging box 18 in the x-axis direction. The end faces S1 and S2 are parallel to each other and form the same rectangle. The side surface S3 is a surface located on the negative side in the y-axis direction of the packaging box 18, and the side surface S4 is a surface located on the positive direction side in the y-axis direction of the packaging box 18. The side surfaces S3 and S4 are parallel to each other and form the same rectangle. The packing box 18 may have a rectangular parallelepiped shape.

  The buffer members 16a and 16b are respectively provided between the end surfaces S11 and S12 (that is, the end portions in the x-axis direction) of the article 15 to be packed and the inner peripheral surfaces of the end surfaces S1 and S2 of the packing box 18, and are caused by dropping or the like. It plays the role of preventing the impact from being transmitted to the packed object 15. The buffer member 16a is attached to the end surface S11 of the article 15 (that is, the end on the negative direction side in the x-axis direction). Further, the buffer member 16b is attached to the end surface S12 of the packaged item 15 (that is, the end portion on the positive direction side in the x-axis direction). The buffer members 16a and 16b are made of an elastic body that easily absorbs an impact (for example, a foam cushioning material having a wide elastic region such as foamed polypropylene or foamed polyethylene).

  When the article 15 and the buffer members 16a and 16b are accommodated in the packing box 18, the lid of the packing box 18 is closed as shown in FIG. The lid of the packing box 18 is sealed with tape or the like. Thereby, packing of the developing device 2 is completed.

  Below, the structure of buffer member 16a, 16b is demonstrated in detail, referring drawings. FIG. 3 is an external perspective view of the buffer member 16b. In FIG. 3, in order to make the structure of the buffer member 16b easy to understand, a part of the buffer member 16b is cut out and displayed. FIG. 4A is a plan view of the buffer member 16b from the negative direction side in the x-axis direction. FIG. 4B is a plan view of the buffer member 16b from the positive direction side in the x-axis direction. FIG. 5A is a cross-sectional structure view taken along line AA of FIG. 4B when no impact is applied. FIG. 5B is a cross-sectional structure diagram along AA in FIG. 4B when an impact is applied. Since the buffer members 16a and 16b have the same structure, the buffer member 16b will be described below as an example.

  As shown in FIGS. 3 and 4, the buffer member 16 b includes a plate-like portion 20, side wall portions 22 a to 22 d, and protrusions 26 a to 26 h, 28 a to 28 h, and 30 a to 30 d. The plate-like portion 20 is a rectangular plate that is orthogonal to the x-axis. Thereby, the plate-shaped part 20 is opposed to the end surface S12 (that is, the end part on the positive direction side in the x-axis direction) of the article 15 to be packed.

  The plate-like portion 20 is provided with linear slits SL <b> 1 to SL <b> 4 configured by holes that penetrate the plate-like portion 20 in the x-axis direction. More specifically, the main surface on the negative side in the x-axis direction of the plate-like portion 20 is a main surface Sa, and the main surface on the positive direction side in the x-axis direction of the plate-like portion 20 is a main surface Sb. In addition, an intersection of diagonal lines of the main surface Sa is set as a point e (see FIG. 4A). The slits SL <b> 1 to SL <b> 4 are provided so as to extend radially from the point e of the plate-like portion 20 when viewed in plan from the z-axis direction. The slit SL1 is provided so as to connect the point a and the point e positioned on the positive side in the z-axis direction with respect to the point e. The slit SL2 is provided so as to connect the point b and the point e located on the negative direction side in the y-axis direction with respect to the point e. The slit SL3 is provided so as to connect the point c and the point e located on the negative direction side in the z-axis direction with respect to the point e. The slit SL4 is provided so as to connect the point d and the point e located on the positive direction side in the y-axis direction with respect to the point e. The points a to d are located on one circle centered on the point e. Therefore, the slits SL1 to SL4 have the same length. Furthermore, when viewed in plan from the z-axis direction, the slits SL1 to SL4 are adjacent to each other in a direction around the point e and form an equal angle (90 degrees).

  Here, when viewed in plan from the z-axis direction, the two slits SL1 to SL4 adjacent in the direction of turning around the point e constitute one slit SL11 to SL14. More specifically, the slits SL1 and SL2 constitute a slit SL11 as shown in FIG. Thereby, the slit SL11 is configured by a hole penetrating the plate-like portion 20 in the z-axis direction, and has the points a and b as both ends and protrudes toward the point e with respect to the straight line l1 connecting the points a and b. It has an L-shaped track. Hereinafter, in the plate-like portion 20, a region surrounded by the straight line 11 and the slit SL11 is referred to as a region A1.

  Further, the slits SL2 and SL3 constitute a slit SL12 as shown in FIG. Thereby, the slit SL12 is configured by a hole penetrating the plate-like portion 20 in the z-axis direction, and has the points b and c at both ends and protrudes toward the point e with respect to the straight line l2 connecting the points b and c. It has an L-shaped track. Hereinafter, in the plate-like portion 20, a region surrounded by the straight line 12 and the slit SL12 is referred to as a region A2.

  Moreover, the slits SL3 and SL4 constitute a slit SL13 as shown in FIG. As a result, the slit SL13 is formed by a hole penetrating the plate-like portion 20 in the z-axis direction, and has the points c and d at both ends and protrudes toward the point e with respect to the straight line l3 connecting the points c and d. It has an L-shaped track. Hereinafter, in the plate-like portion 20, a region surrounded by the straight line 13 and the slit SL13 is referred to as a region A3.

  Moreover, the slits SL4 and SL1 constitute a slit SL14 as shown in FIG. Thereby, the slit SL14 is configured by a hole penetrating the plate-like portion 20 in the z-axis direction, and has the points d and a as both ends and protrudes toward the point e with respect to the straight line l4 connecting the points d and a. It has an L-shaped track. Hereinafter, in the plate-like portion 20, a region surrounded by the straight line 14 and the slit SL14 is referred to as a region A4.

  Here, the end surface S12 (the end portion on the positive side in the x-axis direction) of the article 15 is in contact with the plate-like portion 20 in each of the regions A1 to A4. More specifically, the end surface S12 of the article 15 to be packed is in contact with the portions α to δ (see FIG. 4A) that are farthest from the straight lines 11 to 14 in the regions A1 to A4. Therefore, the plate-like portion 20 has protrusions 24a to 24d that protrude from the main surface Sa toward the negative side in the x-axis direction (that is, the end surface S12 of the packaged object 15). As shown in FIGS. 3 and 4A, the protrusions 24a to 24d have a shape in which a hemisphere centered on the point e is divided into four equal parts by slits SL1 to SL4. Thereby, each of the portions α to δ protrudes most toward the package 15 in the regions A1 to A4. As a result, as shown to Fig.5 (a), end surface S12 of the to-be-packaged item 15 is contacting protrusion 24a-24d of the plate-shaped part 20 in part (alpha) -delta.

  Further, on the main surface Sb on the opposite side of the main surface Sa with which the article 15 is in contact in the plate-like portion 20, points a ′ to d ′ that overlap with the points a to d when viewed in plan from the z-axis direction. The groove | channel 32 which has the circular track | orbit obtained by connecting (refer FIG.4 (b)) is provided. Accordingly, the thickness in the z-axis direction of the region where the groove 32 is provided in the plate-like portion 20 is smaller than the thickness in the z-axis direction of other regions in the plate-like portion 20.

  Further, as shown in FIGS. 4B and 5A, the main surface Sb of the plate-like portion 20 has portions α ′ to δ ′ that overlap with the portions α to δ when viewed in plan from the z-axis direction. There is provided a recess G that becomes deeper as it approaches. More specifically, the region surrounded by the groove 32 of the main surface Sb has a dome shape that is recessed toward the negative side in the x-axis direction. As a result, in the region surrounded by the groove 32 of the main surface Sb, the portions α ′ to δ ′ located closest to the center are located on the most negative direction side in the x-axis direction. Thus, in the buffer member 16b, the thickness of the region A1 to A4 in the plate-like portion 20 in the x-axis direction is reduced by making the inside of the region surrounded by the groove 32 of the main surface Sb into a dome shape. .

  As shown in FIG. 3, the side wall portions 22 a to 22 d are walls that are erected vertically with respect to the plate-like portion 20, and have a square shape when viewed from the negative side in the x-axis direction. Yes. More specifically, the side wall portion 22a is a rectangular plate extending from the side located on the positive direction side in the z-axis direction of the plate-shaped portion 20 toward the negative direction side in the x-axis direction. The side wall portion 22b is a rectangular plate extending from the side located on the negative direction side in the y-axis direction of the plate-shaped portion 20 toward the negative direction side in the x-axis direction. The side wall portion 22c is a rectangular plate extending from the side located on the negative side in the z-axis direction of the plate-like portion 20 toward the negative direction side in the x-axis direction. The side wall portion 22d is a rectangular plate extending from the side located on the positive side in the y-axis direction of the plate-like portion 20 toward the negative direction side in the x-axis direction. The side wall part 22a and the side wall parts 22b and 22d are connected. Moreover, the side wall part 22c and the side wall parts 22b and 22d are connected. Thereby, as shown in FIG. 3, the side wall portions 22 a to 22 d have a square shape when viewed from the negative side in the x-axis direction. And the to-be-packaged object 15 is inserted in the area | region enclosed by side wall part 22a-22d, as shown to Fig.5 (a). Thereby, the buffer member 16b is attached to the article 15 to be packed.

  As shown in FIGS. 3 and 4A, the protrusions 26a to 26h protrude from the inner peripheral surfaces of the side wall portions 22a to 22d toward the center of the region surrounded by the side wall portions 22a to 22d. More specifically, the protrusions 26a and 26b are provided so as to protrude from the main surface on the negative direction side in the z-axis direction of the side wall portion 22a to the negative direction side in the z-axis direction. The protrusions 26a and 26b extend in the x-axis direction in parallel with each other. The protrusions 26c and 26d are provided so as to protrude from the main surface on the positive side in the y-axis direction of the side wall portion 22b to the positive direction side in the y-axis direction. The protrusions 26c and 26d extend in the x-axis direction in parallel with each other. The protrusions 26e and 26f are provided so as to protrude from the main surface on the positive direction side in the z-axis direction of the side wall portion 22c to the positive direction side in the z-axis direction. The protrusions 26e and 26f extend in the x-axis direction in parallel with each other. The protrusions 26g and 26h are provided on the main surface on the negative direction side in the y-axis direction of the side wall portion 22d so as to protrude toward the negative direction side in the y-axis direction. The protrusions 26g and 26h extend in the x-axis direction in parallel with each other.

  The protrusions 26a to 26h configured as described above come into contact with the side surfaces S13, S14, the bottom surface S15, and the top surface S16 of the packed object 15 when the buffer member 16b is attached to the packed object 15. Thereby, the to-be-packaged object 15 is not contacting with the surface (side wall part 22a-22d) with respect to the buffer member 16b, but is contacting with the line | wire (protrusion 26a-26h). And projection 26a-26h can absorb an impact by being compressed at the time of dropping.

  As shown in FIGS. 2, 3, and 4 (a), the protrusions 28 a to 28 h protrude from the outer peripheral surfaces of the side walls 22 a to 22 d. More specifically, the protrusions 28a and 28b are provided so as to protrude from the main surface on the positive side in the z-axis direction of the side wall portion 22a to the positive direction side in the z-axis direction. The protrusions 28a and 28b extend in the x-axis direction in parallel with each other. The protrusions 28c and 28d are provided so as to protrude from the main surface on the negative direction side in the y-axis direction of the side wall portion 22b to the negative direction side in the y-axis direction. The protrusions 28c and 28d extend in the x-axis direction in parallel with each other. The protrusions 28e and 28f are provided so as to protrude from the main surface of the side wall portion 22c on the negative direction side in the z-axis direction to the negative direction side in the z-axis direction. The protrusions 28e and 28f extend in the x-axis direction in parallel with each other. The protrusions 28g and 28h are provided on the main surface of the side wall portion 22d on the positive direction side in the y-axis direction so as to protrude toward the positive direction side in the y-axis direction. The protrusions 28g and 28h extend in the x-axis direction in parallel with each other.

  The protrusions 28a to 28h configured as described above are the inner peripheral surfaces of the side surfaces S3 and S4, the bottom surface S5 and the top surface S6 of the packing box 18 when the article 15 and the buffer member 16b are accommodated in the packing box 18. Is touching. Thereby, the packing box 18 is not in contact with the buffer member 16b at the surface (side wall portions 22a to 22d) but at the line (projections 28a to 28h). And the protrusions 28a-28h can absorb an impact by being compressed at the time of dropping.

  As illustrated in FIG. 2A, the protrusions 30 a to 30 d protrude from the main surface Sb of the plate-like portion 20 to the positive direction side in the x-axis direction. The protrusions 30a to 30d are provided in the vicinity of the four corners of the main surface Sb. Specifically, the protrusion 30a is provided at a corner located on the positive direction side in the y-axis direction and on the positive direction side in the z-axis direction. The protrusion 30b is provided at a corner located on the negative direction side in the y-axis direction and on the positive direction side in the z-axis direction. The protrusion 30c is provided at a corner located on the negative direction side in the y-axis direction and on the negative direction side in the z-axis direction. The protrusion 30d is provided at a corner located on the positive direction side in the y-axis direction and on the negative direction side in the z-axis direction. The lengths of the protrusions 30a and 30d provided on the positive side in the y-axis direction in the x-axis direction are the same as those of the protrusions 30b and 30c provided on the negative direction side in the y-axis direction. It is longer than the length in the x-axis direction. This is because the top surface S16 and the bottom surface S15 of the packing box 18 form a parallelogram as shown in FIG. More specifically, the end surface S2 is inclined with respect to the main surface Sb so that a gap between the main surface Sb and the end surface S2 becomes larger toward the positive direction side in the y-axis direction. Therefore, the lengths of the protrusions 30a and 30d provided relatively on the positive side in the y-axis direction in the x-axis direction are set to the lengths of the protrusions 30b and 30c provided relatively on the negative direction side in the y-axis direction. It is longer than the length in the x-axis direction. Thereby, the tips of the protrusions 30 a to 30 d come into contact with the inner peripheral surface of the end surface S <b> 2 of the packaging box 18. As a result, the object 15 to be packed is restricted from moving in the packing box 18.

  This is the end of the description of the buffer member 16b. The configuration of the buffer member 16a is basically the same as the configuration of the buffer member 16b, and a description thereof will be omitted.

(effect)
According to the buffer members 16a and 16b, the size can be reduced. More specifically, in the buffer members 542L and 542R described in Patent Document 1 shown in FIG. 7, the leg portions 543 and 544 extend in the longitudinal direction of the image forming cartridge 521. Therefore, the buffer members 542L and 542R have a problem that the buffer members 542L and 542R increase in size in the longitudinal direction of the image forming cartridge 521.

  On the other hand, in the buffer members 16a and 16b, by providing the slits SL11 to SL14, the regions A1 to A4 of the plate-like portion 20 constitute a cantilever beam having the straight lines 11 to 14 as fulcrums. Therefore, when the article 15 to be packed is pressed against the regions A1 to A4 of the plate-like portion 20 on the positive side in the x-axis direction due to impact at the time of dropping, the regions A1 to A4 of the plate-like portion 20 are As shown in FIG.5 (b), it elastically deforms so that it may bend to the positive direction side of a x-axis direction by making the straight lines 11-14 into a fulcrum. As a result, the shock at the time of dropping comes to be absorbed by the buffer members 16a and 16b, and the shock is prevented from being transmitted to the packaged object 15. As described above, according to the buffer members 16a and 16b, the plate-like portion 20 having a length (thickness) shorter in the x-axis direction than the leg portions 543 and 544 has a structure that absorbs an impact. Therefore, the buffer members 16a and 16b can be downsized.

  The buffer members 16a and 16b are provided with protrusions 30a to 30d corresponding to the leg portions 543 and 544, respectively. However, the protrusions 30a to 30d may not be provided. However, as shown in FIG. 5B, the protrusions 30a to 30d can absorb the impact by being compressed and / or bent when subjected to the impact. Therefore, by providing the protrusions 30a to 30d, the shock absorbing members 16a and 16b can obtain higher shock absorption. And by combining the projections 30a to 30d and the slits SL11 to SL14, it is possible to improve the shock absorption of the buffer members 16a and 16b without increasing the size of the buffer members 16a and 16b. In other words, in the buffer members 16a and 16b, the protrusions 30a to 30d may be shorter than the leg portions 543 and 544 in order to obtain the same shock absorption as the buffer members 542L and 542R. Therefore, the buffer members 16a and 16b can be downsized.

  Further, the shock absorbing members 16a and 16b can obtain higher shock absorption. More specifically, the end surface S12 of the article 15 to be packed is in contact with the portions α to δ farthest from the straight lines 11 to 14 in the regions A1 to A4. The straight lines l1 to l4 serve as fulcrums when elastically deforming so that the regions A1 to A4 are bent. Therefore, when the portions α to δ farthest from the straight lines l1 to l4 are pushed, the regions A1 to A4 are bent most greatly. And if area | region A1-A4 bends greatly, time required for area | region A1-A4 to bend will become long. As a result, when the end surface S12 contacts the portions α to δ, the time required to absorb the impact can be lengthened, and a small impact can be transmitted to the packed object 15 in a long time. That is, in the buffer members 16a and 16b, it is possible to prevent a large impact from being transmitted to the packed object 15 in a short time. As a result, in the buffer members 16a and 16b, it is possible to prevent a large impact from being applied to the packaged item 15, and to obtain a higher shock absorption.

  Further, in the buffer members 16a and 16b, higher shock absorption can be obtained for the following reason. More specifically, the end surface S12 of the packaged item 15 is in contact with the plate-like portion 20 at the protrusions 24a to 24d. The protrusions 24a to 24d are compressed in the x-axis direction when pressed by the end surface S12 due to an impact at the time of dropping. Thereby, the protrusions 24a to 24d absorb the impact. As a result, high shock absorption can be obtained in the buffer members 16a and 16b.

  Further, in the buffer members 16a and 16b, higher shock absorption can be obtained for the following reason. More specifically, a circular groove 32 is provided on the main surface Sb on the opposite side of the plate-like portion 20, as shown in FIG. Accordingly, the thickness in the z-axis direction of the region where the groove 32 is provided in the plate-like portion 20 is smaller than the thickness in the z-axis direction of other regions in the plate-like portion 20. For this reason, the rigidity of the region where the groove 32 is provided in the plate-like portion 20 is lower than the rigidity of other portions. Since the groove 32 passes through the vicinity of the straight lines 11 to 14, the regions A 1 to A 4 are easily bent due to the presence of the groove 32. As a result, the shock absorbing members 16a and 16b can prevent a large impact from being transmitted to the packed object 15 in a short time. As described above, in the buffer members 16a and 16b, it is possible to prevent a large impact from being applied to the packed object 15 and to obtain a higher shock absorption.

  Further, in the buffer members 16a and 16b, higher shock absorption can be obtained for the following reason. More specifically, the region surrounded by the groove 32 of the main surface Sb has a dome shape that is recessed toward the negative side in the x-axis direction. Thus, in the buffer member 16b, the thickness of the region A1 to A4 in the plate-like portion 20 in the x-axis direction is reduced by making the inside of the region surrounded by the groove 32 of the main surface Sb into a dome shape. . Thereby, since the rigidity of area | region A1-A4 falls, area | region A1-A4 becomes easy to bend. As a result, the shock absorbing members 16a and 16b can prevent a large impact from being transmitted to the packed object 15 in a short time. As described above, in the buffer members 16a and 16b, it is possible to prevent a large impact from being applied to the packed object 15 and to obtain a higher shock absorption.

  Moreover, high durability can be obtained in the buffer members 16a and 16b. More specifically, the areas A1 to A4 are formed by providing the slits SL11 to SL14. And the to-be-packaged goods 15 are contacting the plate-shaped part 20 in four places of area | region A1-A4. That is, the force from the article 15 is distributed to the four areas A1 to A4. As a result, in the buffer members 16a and 16b, the magnitude of the force applied to the regions A1 to A4 is reduced and the regions A1 to A4 are less likely to be damaged than when the force is concentrated on one place of the plate-like portion 20. .

  Moreover, in the buffer members 16a and 16b, high durability can be obtained also for the following reasons. More specifically, the slits SL <b> 1 to SL <b> 4 have the same length, and when viewed in plan from the z-axis direction, the slits SL <b> 1 to SL <b> 4 are adjacent to each other in the direction around the point e and have the same angle (90 Degree). Accordingly, the regions A1 to A4 have the same shape. Thereby, the force which the to-be-packaged item 15 applies to each of area | region A1-A4 becomes equal. As a result, the force concentrates on any of the areas A1 to A4, and the areas A1 to A4 are prevented from being damaged.

(Modification)
In addition, as above-mentioned, protrusion 30a-30d is not an essential structure in buffer member 16a, 16b. FIG. 6 is a cross-sectional structure diagram of a buffer member 16′b according to a modification. FIG. 6 shows the state of the buffer member 16′b when an impact is applied.

  The buffer member 16′b is different from the buffer member 16b in that the protrusions 30a to 30d are not provided. The other configuration of the buffer member 16′b is the same as the other configuration of the buffer member 16b. Also in such a buffer member 16′b, the impact can be absorbed by elastic deformation so that the regions A1 to A4 are bent. A concave portion G is provided on the main surface Sb of the plate-like portion 20. Accordingly, the regions A1 to A4 of the plate-like portion 20 can be elastically deformed so as to be bent without protruding in the positive direction in the x-axis direction from the main surface Sb of the plate-like portion 20, as shown in FIG. Therefore, in the buffer member 16′b, even if the main surface Sb is in contact with the end surface S2 of the packaging box 18, the shock can be absorbed by the regions A1 to A4.

  The number of slits SL1 to SL4 is not limited to this. Three or more slits only need to extend radially around the point e.

  The slits SL11 to SL14 have L-shaped orbits. However, the trajectories of the slits SL11 to SL14 are not limited to this. Therefore, the slits SL11 to SL14 may have a curved orbit.

  In the above description, the item 15 to be packed is the packing box 14 packing the developing device 2, the bag 4, and the buffer members 6, 8, 10, and 12. However, the packaged item 15 may be, for example, the developing device 2 itself.

  The present invention is useful for a buffer member, and is particularly excellent in that the buffer member can be miniaturized.

A1 to A4 region G recess S1, S2, S11, S12 end face S3, S4, S13, S14 side face S5, S15 bottom face S6, S16 top face SL1 to SL4, SL11 to SL14 slit Sa, Sb main faces a to e, a ′ to d 'point 11 to 14 straight line 2 developing device 4 bag 6, 8, 10, 12, 16a, 16b, 16'b cushioning member 14, 18 packing box 15 packaged object 20 plate-like part 22a-22d side wall part 24a-24d , 26a-26h, 28a-28h, 30a-30d Projection 32 Groove

Claims (11)

A cushioning member disposed between a longitudinal end portion of an object to be packed having a longitudinal direction in a predetermined direction and an inner peripheral surface of a first packing box that accommodates the object to be packed;
A plate-like portion facing the end in the longitudinal direction of the article to be packed,
Has
The plate-like portion is a first slit formed by a hole penetrating the plate-like portion in the predetermined direction, and when viewed in plan from the predetermined direction, the first point and the second slit A first slit having a trajectory projecting in one direction with respect to a straight line connecting the first point and the second point with a point at both ends;
An end of the packaged object in the longitudinal direction is in contact with the plate-like part in a region surrounded by the straight line and the first slit;
A cushioning member characterized by the above. The longitudinal end of the article to be packaged is in contact with the first portion that is farthest from the straight line in the region;
The shock-absorbing member according to claim 1. The first portion protrudes most toward the packaged object in the region;
The shock-absorbing member according to claim 2. In the plate-like portion, the depth of the surface opposite to the surface in contact with the packaged object approaches the second portion that overlaps the first portion when viewed in plan from the predetermined direction. A recess that deepens
The shock-absorbing member according to claim 2, wherein: The plate-like portion is provided with a plurality of second slits extending radially from the third point of the plate-like portion when viewed in plan from the predetermined direction,
When viewed in plan from the predetermined direction, the two second slits adjacent in the direction of circling around the third point constitute one first slit,
The shock-absorbing member according to claim 1, wherein: The plurality of second slits have an equal angle and an equal length;
The shock-absorbing member according to claim 5. A third point that overlaps the first point and the second point when seen in a plan view from the predetermined direction on the surface of the plate-like part opposite to the surface that the object to be packed is in contact with, A groove having a circular orbit obtained by connecting the fourth point is provided;
The shock-absorbing member according to claim 1, wherein: In the plate-like portion, a protrusion protruding from the surface on the opposite side of the surface that the article to be packed is in contact with,
More
The shock-absorbing member according to claim 1, wherein: The to-be-packaged item is a second packing box for packing electronic devices;
The shock-absorbing member according to claim 1, wherein: Made of elastic material,
The shock-absorbing member according to claim 1, wherein: The elastic material is foamed polypropylene or foamed polyethylene;
The shock-absorbing member according to claim 10.

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