JP6014840B2 - Cushioning material for thin plates - Google Patents

Description

  The present invention relates to a cushioning material for a thin plate that can easily and reliably protect the peripheral portion of a sheet metal part such as an automobile or a thin plate-like part such as glass.

When transporting plate-like members such as automobile door panels and hoods, the edges may be deformed or damaged by impact during transportation. Conventionally, an edge protection member is attached to the edge of such a plate-like member to absorb impact during transportation to prevent deformation and damage of the edge of the plate-like member.
For example, in (Patent Document 1), a protective material main body made of an elastic foam material, a groove-shaped insertion cut portion formed in the longitudinal direction of the protective material main body, and an insertion cut portion are formed to intersect. In addition, there is disclosed an edge protection material for a plate-like member provided with a bending cut formed by leaving a hinge portion for bending the protective material main body.
In addition, (Patent Document 2) is configured in an L-shape that can be addressed to the corner of the outer frame of the sash, and is mounted on the inner corner surface addressed to the outer frame so as to protrude from the outer periphery of the outer frame. Insertion groove into which the flange portion is inserted is formed, and the outer corner surface opposite to the inner corner surface is formed with a band groove that accommodates a stop band wound around the outer frame in the circumferential direction. A material is disclosed.

JP 2007-45438 A JP 2000-264361 A

However, the above conventional techniques have the following problems.
(1) The edge protection material of the plate-like member of (Patent Document 1) may cause the plate-like member to be bent at a right-angled edge portion of the insertion cut-out portion due to an impact at the time of dropping, etc. It had the problem of lacking in nature.
Moreover, although the protective material main body of the edge part protection material of the plate-shaped member of (patent document 1) is formed with the foam material which has elasticity, in order to protect the edge part of a plate-shaped member from an impact, it is formed solidly. Since it has rigidity, it not only has mass, but also tends to be bulky and collapsed when stacked, resulting in lack of space saving and handling properties during storage.
(2) Since the protective material for a sash of (Patent Document 2) is formed in an L shape, it can be directed to the corner of the outer frame of the sash, but cannot be used to protect a straight portion. The application is limited, and there is a problem of lack of versatility.
In addition, the protective material for sash of (Patent Document 2) is provided with a protruding portion inside the insertion groove, so that even if the thickness of the mounting flange portion inserted into the insertion groove is slightly different, the protrusion is elastically deformed. The mounting flange is intended to be sandwiched from the left and right, but the upper surface of the protruding part is flush with the inner surface of the protective material for the sash. In addition to lacking in properties, the projecting portion stands perpendicular to the insertion groove having a V-shaped cross section, so that the projecting portion is difficult to deform and has a problem of lack of fixing stability.
Furthermore, for this reason, the protective material for sash of (Patent Document 2) must be fixed by winding a stop band around the band groove formed on the outer corner surface along the circumferential direction of the outer frame. Has the problem of lack of workability.

  The present invention solves the above-mentioned problems, is lightweight, excellent in resource saving and mass productivity, can reliably protect the peripheral edge of a thin plate-like component, and can be directly applied to the component even when subjected to an impact such as dropping. It is difficult to apply a load, can prevent deformation and damage of parts, has excellent reliability and stability of protection of parts, can be easily attached to and detached from parts, and can maintain an appropriate fitting force, Excellent packing workability and fixing reliability, stackable and easy to carry, excellent transportability, not bulky during storage, excellent space saving, and on the straight part of the periphery of parts The purpose of the present invention is to provide a cushioning material for thin plates with excellent versatility that can be applied to both corners.

Means for solving the problems, and actions and effects obtained thereby

In order to solve the above problems, the buffer material for thin plate of the present invention has the following configuration.
The buffer material for a thin plate according to claim 1 of the present invention is a buffer material for a thin plate that is formed of a synthetic resin and protects a peripheral portion of a thin plate-like component, and is formed in a hollow convex shape and is opposed to the pair. And a pair of the side wall portions formed between the pair of side wall portions so as to be wider than the plate thickness of the component, and formed at both end portions in the longitudinal direction of the groove portion so as to protrude below the bottom surface of the groove portion. The stepped portion and the projecting portions that protrude from the inner wall of each of the side wall portions toward the groove portion and are alternately arranged in the longitudinal direction of the groove portion and sandwich the peripheral edge portion of the component are integrally formed and face each other It has the structure provided with the clearance gap between which the peripheral part of the said thin plate-shaped component formed between a projection part and the said projection part is clamped.
This configuration has the following operations and effects.
(1) A groove formed wider than the thickness of the part between the pair of side wall parts, and a peripheral part of the part protruding from the inner wall of each side wall part toward the groove part and arranged alternately in the longitudinal direction of the groove part By providing the protrusions for sandwiching the thin film, it is not necessary to form a narrow and deep groove for sandwiching the peripheral edge of the thin plate-like component, and the shape flexibility and mass productivity are excellent.
(2) Since the protrusions sandwiching the peripheral edge of the component protrude from the inner wall of each side wall part toward the groove part and are alternately arranged in the longitudinal direction of the groove part, the gap between the protrusions facing each other and the protrusions are accurately formed. Therefore, even extremely thin parts can be securely held and fixed, and the parts are reliably fixed and the protection reliability is excellent.
(3) Since the pair of oppositely arranged side wall portions are formed in a hollow convex shape, it is not only light weight, excellent in handleability and resource saving, but also stackable and portable, and excellent in transportability. It is not bulky during storage and is excellent in space saving.
(4) In vacuum forming, it is difficult to form a narrow and deep groove, but the groove is formed wider than the plate thickness of the component, and a protrusion protruding from the inner wall of each side wall toward the groove is formed. By alternately arranging the grooves in the longitudinal direction, gaps corresponding to the thickness of the thin plate-like component are formed between the protruding portions that are alternately opposed to each other, and the peripheral portion of the component can be securely held. it can.
(5) By having a stepped portion formed at both ends in the longitudinal direction of the groove portion so as to protrude to a position lower than the bottom surface of the groove portion, the side wall portion can be prevented from being crushed by a load from above, and the shape stability, Excellent durability.
(6) When a load of a certain level or more is applied, the stepped portion is deformed and absorbs an impact, so that the component can be prevented from being damaged at the side wall, and the reliability of component protection is excellent.

Here, the buffer material for the thin plate is formed of synthetic resin, but it is preferable that the side wall portion, the groove portion, and the protrusion portion are integrally formed. In particular, vacuum forming and pressure forming are preferable because they are excellent in design flexibility, mass productivity, and resource saving. Polypropylene, polysulfone, polyethylene, polyethylene terephthalate, and the like can be used as the material for the buffer material for the thin plate. In the case of vacuum molding, particularly soft and sticky polypropylene is preferably used. In addition, when the buffer material for thin plates is translucent, it is whitened by impact such as dropping, but by being colored white by a pigment or the like, whitening becomes inconspicuous and excellent in aesthetics.
Moreover, by forming a bowl-shaped outer peripheral bottom plate on the outer periphery of the bottom portion of the thin plate cushioning material, the strength of the side wall portion can be improved, and the shape stability and durability are excellent.
The shape, size, arrangement, and the like of the side wall portion and the protruding portion can be appropriately selected according to the size, thickness, mass, etc. of the component protected by the thin plate cushioning material. In particular, the dimensions and arrangement of the protrusions are designed so that they do not interfere with the dimensions and position of the irregularities formed on the peripheral edge of the component, so that the predetermined position of the peripheral edge of the component is securely held. And can be protected. In addition, it is excellent in the holding | maintenance stability of components by having three or more protrusion parts arrange | positioned alternately.
The shape and dimensions of the step portion can be selected as appropriate. Although it depends on the shape of the stepped portion, the height of the stepped portion is preferably about 2/5 to 2/3 of the height to the bottom surface of the groove portion, and the lateral width (length) of the stepped portion is 2/5 of the width of the groove portion. About 2/3 is preferable.
As the height of the step portion becomes lower than 2/5 of the height to the bottom surface of the groove portion or becomes higher than 2/3, or the lateral width (length) of the step portion becomes smaller than 2/5 of the width of the groove portion. As the length becomes shorter or becomes longer than 2/3, the buffering force tends to be lowered, and the reliability of protection of components tends to be lacking. However, it varies somewhat depending on the type of resin used as a raw material.

Invention of Claim 2 is a buffer material for thin plates of Claim 1, Comprising: It has the structure provided with the hole part formed in the upper surface part of the said side wall part by the side of the said projection part. Yes.
With this configuration, in addition to the operations and effects of claim 1, the following operations and effects are provided.
(1) By having a hole formed in the upper surface of the side wall on the base side of the protrusion, the inner wall of the side wall where the protrusion is formed is easily deformed, and even when an impact such as dropping is applied. The shock is absorbed by the spring property of the inner wall that supports both sides of the protruding part, the part is difficult to be pressed by the protruding part, the part can be prevented from being deformed or damaged, and the component protection is excellent in reliability and stability. .

Here, the hole is formed in the upper surface portion of the side wall portion on the base side of the projection portion. However, since the hole portion is located on the back side of the projection portion, the outer periphery on the base side of the projection portion is the upper surface portion of the side wall portion. It is hard to be restrained by the outer wall and has a spring property.
The hole is formed in a long hole shape along the longitudinal direction of the upper surface of the side wall. The length of the hole is preferably about 1.5 to 3 times the width of the protrusion. As the length of the hole becomes shorter than 1.5 times the width of the protrusion, the springiness of the inner wall on the outer periphery of the protrusion decreases, and when a load is applied to the bottom surface of the groove due to impact during dropping, etc. The whole side wall part on both sides tends to fall inward, and the parts tend to be compressed and deformed easily by the protruding part, and the rigidity of the side wall part decreases as it becomes larger than 3 times, and the protruding part goes outward. It tends to be deformed, and there is a tendency that the fixing stability of the component tends to be lowered due to insufficient force for clamping the component, both of which are not preferable. However, it varies somewhat depending on the type of resin used as a raw material.

According to a third aspect of the invention, a thin cushioning material according to claim 1 or 2, formed in the groove deeper V-shape intersect with the groove in the middle of the longitudinal direction of the groove It has the structure provided with the notch part and the thin hinge part formed in the bottom part of the said notch part.
With this configuration, the following functions and effects are provided in addition to the functions and effects of the first or second aspect .
(1) By having a notch part formed in a V shape that is deeper than the groove part and intersecting the groove part in the middle of the longitudinal direction of the groove part, and a thin-walled hinge part formed at the bottom of the notch part, It can be easily bent and deformed, and can protect the corners of parts bent at an obtuse angle of 90 degrees or greater than 90 degrees, and is excellent in versatility and functionality.

  Here, the angle of the cut portion can be selected as appropriate. However, if the inclination angle of the slope on one side is 45 degrees and the angle is 90 degrees on both sides, the corner of the part bent at 90 degrees Not only the part (edge) but also the corner part of the part bent at an obtuse angle larger than 90 degrees can be dealt with, and the versatility is excellent.

The invention according to claim 4 is the cushioning material for thin plate according to claim 3 , and has a configuration provided with a perforation formed along the longitudinal direction of the hinge portion.
With this configuration, in addition to the operation and effect of the third aspect , the following operation and effect are provided.
(1) By having a perforation formed along the longitudinal direction of the hinge portion, the length can be easily cut and adjusted at the hinge portion according to the dimensions of the component, and the versatility is excellent.

A fifth aspect of the present invention is the thin plate cushioning material according to any one of the first to fourth aspects, wherein a chamfered portion formed in an arc shape is formed at the upper corner on the tip side of the protruding portion. It has the composition provided.
With this configuration, in addition to the function and effect of any one of claims 1 to 4 , the following function and effect are provided.
(1) By having a chamfered portion formed in an arc shape in the upper corner on the tip side of the protruding portion, the end of the component can be smoothly inserted into the gap between the protruding portion and the workability. Excellent.
(2) Since the chamfered portion at the upper corner of the tip of the protrusion is formed in an arc shape, even if the protrusion is tilted inward of the groove along with the side wall due to an impact at the time of dropping, the angle of the protrusion The parts are not compressed and damaged, and the reliability of parts protection is excellent.

  Here, when the chamfered portion is formed in a tapered shape, the component is damaged at the corner portion on the lower end side of the chamfered portion. Therefore, the chamfered portion is preferably formed in an arc shape.

When the reinforcing ribs formed on the bottom surface of the groove portion are provided, the bending strength of the bottom surface can be improved, the bottom surface of the groove portion is not easily deformed due to a drop impact or the like, and the protrusion portion tilts inside the groove portion together with the side wall portion. This prevents the parts from being pressed and damaged by the protrusions, and has excellent shape stability and reliability of part protection.
When the reinforcing rib formed on the outer wall surface of the side wall portion is used, the strength of the outer wall of the side wall portion can be improved, and deformation (curvature) or crushing of the side wall portion can be effectively prevented. Excellent durability.

Here, the reinforcing rib formed on the bottom surface of the groove is preferably formed in a concave groove shape. Further, the arrangement and shape pattern can be selected as appropriate, but the bending strength of the entire bottom surface can be effectively increased by arranging the reinforcing ribs formed in parallel with the width direction and the longitudinal direction of the groove portion. Can be improved.
The reinforcing rib formed on the outer wall surface of the side wall portion is preferably formed in a concave groove shape on the outer wall of the side wall portion. The number and arrangement thereof can be selected as appropriate, but the bending strength of the side wall portion can be effectively improved by forming it in parallel with the height direction of the outer wall.

The model perspective view which shows the buffer material for thin plates of Embodiment 1. FIG. The schematic plan view which shows the buffer material for thin plates of Embodiment 1 The schematic side view which shows the buffer material for thin plates of Embodiment 1 The schematic front view which shows the 1st use condition of the shock absorbing material for thin plates of Embodiment 1. FIG. The schematic side view which shows the 1st use condition of the shock absorbing material for thin plates of Embodiment 1. FIG. The schematic front view which shows the 2nd use condition of the shock absorbing material for thin plates of Embodiment 1. FIG.

Hereinafter, the buffer material for thin plates in the embodiment of the present invention will be described with reference to the drawings. The technical scope of the present invention is not limited to these embodiments.
(Embodiment 1)
FIG. 1 is a schematic perspective view showing the buffer material for a thin plate according to the first embodiment, FIG. 2 is a schematic plan view showing the buffer material for the thin plate according to the first embodiment, and FIG. 3 is for the thin plate according to the first embodiment. It is a model side view which shows a buffer material.
1 to 3, 1 is a thin plate cushioning material according to the first embodiment of the present invention formed by vacuum forming polypropylene, and 2 is formed in a hollow convex shape so as to face each other, with a central portion in the longitudinal direction. A pair of side wall portions separated by a notch 7 described later, 2a is an inner wall of the side wall portion 2, 2b is an outer wall of the side wall portion 2, 2c is an upper surface portion of the side wall portion 2, and 3 is a pair of side wall portions 2 and 2. The groove portions 3a are formed wider than the plate thickness of the parts, 3a is the bottom surface of the groove portion 3, 4 protrudes from the inner walls 2a of the side wall portions 2 and 2 toward the groove portion 3, and is alternately arranged in the longitudinal direction of the groove portions 3. A total of six protrusions 4a that sandwich the peripheral edge of the component, 4a is a chamfered portion formed in an arc shape at the upper corner of the protrusion 4, and 4b is between the protrusion 4 and the protrusion 4 facing each other. A gap formed in correspondence with the thickness of the thin plate-like component (FIG. 3), 5 is a side wall on the base side of each projection 4 2 is a hole formed in the upper surface portion 2c, 6 is a step portion (FIG. 2) formed at both ends in the longitudinal direction of the groove portion 3 so as to protrude below the bottom surface 3a of the groove portion 3, and 7 is the longitudinal length of the groove portion 3. A cut portion formed in a V shape deeper than the groove portion 3 intersecting the groove portion 3 in the middle of the direction, 8 is a thin-walled hinge portion formed at the bottom of the cut portion 7, and 9a and 9b are bottom surfaces 3a of the groove portion 3. Recessed rib-shaped reinforcing ribs (FIG. 2) and 10 are outer peripheral bottom plates formed like a bowl on the outer periphery of the bottom of the thin plate cushioning material 1.

The usage method of the buffer material for thin plates in Embodiment 1 comprised as mentioned above is demonstrated.
FIG. 4 is a schematic front view showing a first use state of the thin plate cushioning material of the first embodiment, and FIG. 5 is a schematic side view showing a first use state of the thin plate cushioning material of the first embodiment. FIG. 6 is a schematic front view showing a second usage state of the thin plate cushioning material of the first embodiment.
4 to 6, reference numeral 20 denotes a sheet metal part of an automobile or a thin plate part such as glass.
First, in the first use state shown in FIGS. 4 and 5, the peripheral edge (end) of the component 20 is inserted into the gap 4b, the end face is supported by the bottom face 3a of the groove 3, and the protrusion 4 from both sides. It is pinched by. At this time, since the arc-shaped chamfered portion 4 a is formed at the upper corner of the protruding portion 4, the end portion of the component 20 can be smoothly inserted into the gap 4 b between the protruding portion 4 and the protruding portion 4. Can do. Further, even when the protrusion 4 and the side wall 2 are inclined to the inside of the groove 3 due to an impact at the time of dropping, the component 20 is not pressed and damaged at the corner of the protrusion 4, so the reliability of component protection Excellent.
In vacuum forming, it is difficult to form a narrow and deep groove, but the groove portion 3 is formed wider than the plate thickness of the component, and the protruding portion protrudes from the inner wall 2a of each side wall portion 2 toward the groove portion 3. 4 are alternately arranged in the longitudinal direction of the groove portion 3 to form gaps 4b corresponding to the thickness of the thin plate-like component 20 between the protruding portions 4 and the protruding portions 4 that are alternately opposed to each other. The part can be securely clamped.
In addition, the shape, dimension, arrangement | positioning, etc. of the side wall part 2 and the projection part 4 can be suitably selected according to the dimension, board thickness, mass, etc. of the component 20 protected with the buffer material 1 for thin plates. In particular, the dimensions and arrangement of the protrusions 4 are designed so that they do not interfere with the dimensions and positions of the projections and depressions formed on the edges of the parts 20, so that the predetermined positions of the edges of the parts 20 are determined. It can be securely held and protected.

In the present embodiment, as shown in FIGS. 1 and 2, the hole 5 is formed in the upper surface 2 c of the side wall 2 on the root side of the protrusion 4. Thereby, since the hole part 5 is located in the back side of the projection part 4, the inner wall 2a of the outer periphery of the projection part 4 is hard to be restrained by the upper surface part 2c and the outer wall 2b of the side wall part 2, and has a spring property. As a result, even when an impact such as a drop is applied, the impact is absorbed by the spring property of the inner wall 2a that supports both sides of the projection 4 and the component 20 is not easily pressed by the projection 4 and the component 20 is not deformed or damaged. Can be prevented.
The hole 5 was formed in the shape of a long hole about 1.5 to 3 times the width of the protrusion 4 along the longitudinal direction of the upper surface 2 c of the side wall 2. As the length of the hole 5 becomes shorter than 1.5 times the width of the protrusion 4, the spring property of the outer periphery (inner wall 2 a) on the base side of the protrusion 4 is reduced, and the groove 3 is affected by an impact when dropped. When a load is applied to the bottom surface 3a, the entire side wall portion 2 on both sides tends to fall inward, the component 20 tends to be compressed by the protrusion 4, and the deformation tends to occur, and as it becomes larger than three times, This is because it has been found that the rigidity of the side wall portion 2 is lowered, the protruding portion 4 is easily deformed to the outside, the force for clamping the component 20 is insufficient, and the fixing stability of the component 20 tends to be lowered. .

Further, in the present embodiment, as shown in FIG. 2, the stepped portions 6 protruding at positions lower than the bottom surface 3 a of the groove portion 3 are formed at both ends in the longitudinal direction of the groove portion 3. Accordingly, the side wall 2 is prevented from being crushed by a load from above, and when the load of a certain level or more is applied, the step portion 6 is deformed and absorbs an impact, whereby the side wall 2 is made of the component 20. To prevent hurting.
The height of the step portion 6 is formed to be about 2/5 to 2/3 of the height to the bottom surface 3a of the groove portion 3, and the lateral width (length) of the step portion 6 is 2/5 to 5/5 of the width of the groove portion 3. It was formed to about 2/3. As the height of the step portion 6 becomes lower than 2/5 of the height to the bottom surface 3a of the groove portion 3 or becomes higher than 2/3, or the lateral width (length) of the step portion 6 becomes the width of the groove portion 3. This is because, as it becomes shorter than 2/5 or longer than 2/3, it is found that the buffering force tends to decrease, and the reliability of protection of components tends to be lacking.

Further, in the present embodiment, as shown in FIG. 2, concave groove-shaped reinforcing ribs 9 a and 9 b are formed on the bottom surface 3 a of the groove portion 3. The arrangement and shape pattern of the reinforcing ribs can be selected as appropriate. However, by arranging the reinforcing ribs formed in parallel with the width direction and the longitudinal direction of the groove portion 3 as shown in FIG. The bending strength can be effectively improved. In addition, a reinforcing rib can be appropriately formed on the outer wall 2b of the side wall portion 2. In particular, by forming the reinforcing rib in parallel with the height direction of the outer wall 2b, the bending strength of the side wall portion 2 can be effectively improved.
Moreover, in this Embodiment, as shown in FIG. 2, the strength of the side wall part 2 was improved by forming the bowl-shaped outer peripheral bottom plate 10 on the outer periphery of the bottom part of the cushioning material 1 for thin plate.

Next, in the second use state shown in FIG. 6, the thin plate cushioning material 1 is bent at a right angle by the thin-walled hinge portion 8 (see FIG. 1) formed at the bottom of the notch portion 7, thereby 90 degrees. The corner portion of the component 20 bent in the step was protected.
The angle of the cut portion 7 can be selected as appropriate. However, as shown in FIG. 4, if the inclined angle of the inclined surface on one side is 45 degrees and 90 degrees is formed on both sides, the angle is 90 degrees. In addition to the corners (edges) of the parts 20 bent in a straight line, the corners of parts bent at an obtuse angle larger than 90 degrees can be handled, and the versatility is excellent.
In addition, when the perforation is formed along the longitudinal direction of the hinge portion 8, the length can be adjusted by easily separating the thin plate cushioning material 1 with the hinge portion 8 according to the dimensions of the component 20, etc. Excellent versatility.
However, the range of the numerical value limitation of the dimensions in each of the above parts is somewhat different depending on the type of the raw material resin.

Since the buffer material for thin plates of Embodiment 1 is configured as described above, it has the following effects.
(1) A groove formed wider than the thickness of the part between the pair of side wall parts, and a peripheral part of the part protruding from the inner wall of each side wall part toward the groove part and arranged alternately in the longitudinal direction of the groove part By providing the protrusions for sandwiching the thin film, it is not necessary to form a narrow and deep groove for sandwiching the peripheral edge of the thin plate-like component, and the shape flexibility and mass productivity are excellent.
(2) Since the protrusions sandwiching the peripheral edge of the component protrude from the inner wall of each side wall part toward the groove part and are alternately arranged in the longitudinal direction of the groove part, the gap between the protrusions facing each other and the protrusions are accurately formed. Therefore, even extremely thin parts can be securely held and fixed, and the parts are reliably fixed and the protection reliability is excellent.
(3) Since the pair of oppositely arranged side wall portions are formed in a hollow convex shape, it is not only light weight, excellent in handleability and resource saving, but also stackable and portable, and excellent in transportability. It is not bulky during storage and is excellent in space saving.
(4) By having a hole formed in the upper surface portion of the side wall portion on the base side of the protruding portion, the inner wall of the side wall portion where the protruding portion is formed is easily deformed, and even when an impact such as dropping is applied The shock is absorbed by the spring property of the inner wall that supports both sides of the protruding part, the part is difficult to be pressed by the protruding part, the part can be prevented from being deformed or damaged, and the component protection is excellent in reliability and stability. .
(5) By having a stepped portion formed at both ends in the longitudinal direction of the groove portion so as to protrude to a position lower than the bottom surface of the groove portion, the side wall portion can be prevented from being crushed by a load from above, and the shape stability, Excellent durability.
(6) When a load of a certain level or more is applied, the stepped portion is deformed and absorbs an impact, so that the component can be prevented from being damaged at the side wall, and the reliability of component protection is excellent.
(7) By having a notch part formed in a V shape that is deeper than the groove part and intersecting the groove part in the middle of the longitudinal direction of the groove part, and a thin-walled hinge part formed at the bottom of the notch part, It can be easily bent and deformed, and can protect the corners of parts bent at an obtuse angle of 90 degrees or greater than 90 degrees, and is excellent in versatility and functionality.
(8) By having a chamfered portion formed in an arc shape at the upper corner of the tip of the protrusion, the end of the component can be smoothly inserted into the gap between the protrusion and the protrusion. Excellent.
(9) Since the chamfered portion at the top corner of the protruding portion is formed in an arc shape, even when the protruding portion is tilted inside the groove portion together with the side wall portion due to impact at the time of dropping or the like, The parts are not compressed and damaged, and the reliability of parts protection is excellent.
(10) When the reinforcing rib formed on the bottom surface of the groove portion is provided, the bending strength of the bottom surface can be improved, and the bottom surface of the groove portion is not easily deformed due to a drop impact or the like. This prevents tilting and prevents parts from being pressed and damaged by the protrusions, providing excellent shape stability and reliability of component protection.

  The present invention is lightweight, excellent in resource saving and mass productivity, can reliably protect the peripheral part of a thin plate-like component, and even when subjected to an impact such as dropping, it is difficult to directly apply a load to the component. It can prevent deformation and damage, has excellent reliability and stability of protection of parts, can be easily attached to and detached from parts, and can maintain an appropriate fitting force. Excellent reliability, easy to carry by stacking, excellent transportability, not bulky during storage, excellent space saving, and also supports both straight and corner parts of parts It is possible to provide a cushioning material for thin plates with excellent versatility, which can improve the reliability of parts conveyance, contribute to resource saving and environmental protection.

DESCRIPTION OF SYMBOLS 1 Buffer material 2 for thin plates Side wall part 2a Inner wall 2b Outer wall 2c Upper surface part 3 Groove part 3a Bottom surface 4 Protrusion part 4a Chamfered part 4b Gap 5 Hole part 6 Step part 7 Cut part 8 Hinge part 9a, 9b Reinforcement rib 10 Outer bottom board 20 Parts

Claims (5)

A buffer material for a thin plate that is formed of a synthetic resin and protects a peripheral portion of a thin plate-shaped component,
A pair of side wall portions formed in a hollow convex shape and disposed opposite to each other, a groove portion formed between the pair of side wall portions wider than the plate thickness of the thin plate-like component, and both ends in the longitudinal direction of the groove portion A stepped portion formed to project at a position lower than the bottom surface of the groove portion, and projecting from the inner wall of each of the side wall portions toward the groove portion, and arranged alternately in the longitudinal direction of the groove portion, A projecting portion that is sandwiched between the projecting portion and the projecting portion, and a gap is formed between the projecting portion and the projecting portion so that a peripheral edge of the thin plate-like component is inserted. A cushioning material for a thin plate, comprising a bottom surface for supporting an end surface of a peripheral edge. The thin plate cushioning material according to claim 1, further comprising a hole formed in an upper surface portion of the side wall portion on a base side of the protruding portion. In the middle of the longitudinal direction of the groove portion, a cut portion formed in a V shape that intersects the groove portion and deeper than the groove portion, and a thin-walled hinge portion formed at the bottom of the cut portion are provided. The buffer material for thin plates according to claim 1 or 2 , characterized in that The thin plate cushioning material according to claim 3 , further comprising a perforation formed along a longitudinal direction of the hinge portion. The cushioning material for thin plates according to any one of claims 1 to 4 , further comprising a chamfered portion formed in an arc shape at an upper corner on the tip side of the protruding portion.

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