JP7326924B2 - Cushioning member and method for manufacturing cushioning member - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cushioning member used when packing an object to be packed and a method of manufacturing the cushioning member.

Japanese Patent Application Laid-Open No. 2004-338785 (Patent Document 1), for example, discloses a cushioning member used when packing an object to be packed.

The buffer member disclosed in Patent Document 1 includes a medium storage portion that stores a medium, a check valve that allows the medium flowing toward the medium storage portion to pass through and restricts the medium that flows backward from the medium storage portion, and a medium storage portion that expands. For this purpose, an introduction section for introducing the medium from the outside of the packing member into the medium storage section via the check valve, and a medium that flows back from the medium storage section to the introduction section via the check valve flows from the introduction section into the packing member. A sealing area for sealing the inlet provided upstream of the check valve in the inlet direction from the inlet to the check valve in order to prevent the medium from leaking out to the outside. and a sealing region that is sealed after being accommodated in the medium accommodation unit. In addition, a plurality of medium containing portions are provided, and the introducing portions are provided independently according to the number of medium containing portions.

Japanese Patent Application Laid-Open No. 2004-338785

When an external force acts while the object to be packed is packed using the cushioning member, the cushioning member may be pressed from the outside. In the cushioning member disclosed in Patent Document 1, when the check valve is damaged or pressure exceeding the sealing capacity of the check valve is applied, part of the medium stored in the medium storage portion is checked. It travels through the valve to the inlet and an internal leak occurs. In this case, the amount of medium accommodated in the medium accommodating portion is reduced, so the cushioning function of the cushioning member is deteriorated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cushioning member capable of suppressing deterioration of the cushioning function, and a method of manufacturing the cushioning member.

A cushioning member according to the first aspect of the present invention is a resin sheet welded into a bag shape. The cushioning member includes a storage bag portion that stores a medium, a first welding portion that partitions the storage bag portion so that the storage bag portion is provided with an opening through which the medium can pass, a first end portion, and a non-return provided in the opening, having a second end, the first end positioned inside the containing bag, and the second end positioned outside the containing bag; A valve, the medium contained in the containing bag portion, and the check valve are connected to the first welding portion at both ends of the check valve in a direction intersecting the direction in which the check valve protrudes from the containing bag portion. and a second welded portion that defines a flow path that communicates with the opening, and a third welded portion that is connected to the second welded portion and seals the flow path. The third welded portion is provided so as to intersect the check valve at a portion protruding from the accommodation bag portion.

In addition, when the check valve in the vicinity of the opening is treated to be difficult to weld, the third welding portion is provided so as to intersect the check valve. Also includes the case where the welded portion is provided so as to cover the

In the cushioning member according to the first aspect of the present invention, the third welded portion is provided between the second end portion and the accommodation bag portion at a position closer to the accommodation bag portion. may Further, the entire region covering the second end portion and continuing to the first welding portion of the portion forming the boundary line between the housing bag portion and the outside may be defined as the welding region.

In the cushioning member according to the first aspect of the present invention, the openings include first openings arranged side by side in a direction intersecting the direction in which the check valve protrudes from the housing bag, and The check valve may be provided at each of the first inlet and the second inlet, including a second opening.

In the cushioning member according to the first aspect of the present invention, the housing bag portion includes a first chamber and a A second chamber and a crank-like connection path connecting the first chamber and the second chamber may be included.

In the cushioning member according to the first aspect of the present invention, the accommodation bag portion may be provided so as to be bendable along the connection path.

In the cushioning member according to the first aspect of the present invention, a plurality of the housing bag portions may be arranged side by side. Further, the second welded portion is formed in a direction in which the check valve protrudes from the accommodating bag portion from the first welded portion of the portion defining both end portions of the accommodating bag portion in the direction in which the plurality of accommodating bag portions are arranged. may be provided so as to extend to

In the cushioning member according to the first aspect of the present invention, the tip of the second welded portion connected to the first welded portion of the portion defining the boundary between the adjacent storage bag portions is rounded. It is preferable to include a tinged portion.

In the cushioning member according to the first aspect of the present invention, the tip end of the second welded portion connected to the first welded portion of the portion defining the boundary between the adjacent storage bag portions is: It is preferable that it is provided so as to protrude from the third welding portion.

A cushioning member according to a second aspect of the present invention is formed by welding a resin sheet into a bag shape. Each of the cushioning members has a check valve, and a plurality of storage bag portions containing the medium injected from the inlet of each of the check valves, and movement of the medium between the plurality of storage bag portions. a weld to which each of the inlets is welded to prevent.

In the cushioning member according to the second aspect of the present invention, the inlets of the respective check valves may be positioned on the same straight line.

In the cushioning member according to the second aspect of the present invention, the check valves of the plurality of storage bag portions may be arranged in a row. In this case, it is preferable that the cushioning member has a welding line that defines a boundary between the check valves that are adjacent to each other, and that the welding portion is provided so as to cross the welding line. .

In the cushioning member according to the second aspect of the present invention, it is preferable that the tip of the welding line includes a rounded portion.

In the cushioning member according to the second aspect of the present invention, it is preferable that the tip of the welding line is provided so as to protrude from the welding portion.

A method for manufacturing a cushioning member according to a third aspect of the present invention is a method for manufacturing a cushioning member in which a resin sheet is welded into a bag shape. The method of manufacturing the cushioning member comprises: welding a resin sheet into a bag shape to form a plurality of storage bag portions each having a check valve and capable of accommodating a medium; a step of filling a medium into the storage bag portion through the check valve from a flow path provided in the storage bag portion; a step of welding the inlet portion of the check valve after filling the storage bag portion with the medium; Prepare.

In the method of manufacturing a cushioning member according to the third aspect of the present invention, in the step of forming the plurality of storage bag portions, the inlet portion of the check valve of each of the plurality of storage bag portions may be formed so as to be positioned on the same straight line.

In the method of manufacturing a cushioning member according to the third aspect of the present invention, in the step of forming the plurality of storage bag portions, the check valves of the plurality of storage bag portions are arranged in a row. and forming a weld line defining the boundaries of said non-return valves adjacent to each other. Furthermore, in the step of welding the entrance portion, it is preferable to form the welded portion so as to intersect the welded line.

In the method of manufacturing a cushioning member according to the third aspect of the present invention, in the step of forming the plurality of housing bag portions, the welding line is formed such that the tip of the welding line includes a rounded portion. Forming a line is preferred.

In the method of manufacturing a cushioning member according to the third aspect of the present invention, in the step of welding the entrance portion, the welded portion is formed so that the tip of the weld line protrudes from the welded portion. is preferred.

In the method of manufacturing a cushioning member according to the third aspect of the present invention, in the step of forming the plurality of storage bag portions, the check valves of the plurality of storage bag portions are arranged in a row. It may be formed as In this case, in the step of welding the inlet portion, a welding line defining a boundary between the check valves adjacent to each other may be formed, and the welding portion may be formed so as to intersect the welding line.

ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the cushioning member which can suppress the fall of a cushioning function, and the said cushioning member can be provided.

2 is a schematic diagram showing a packing state in which the image forming apparatus according to Embodiment 1 is packed; FIG. It is a figure which shows the state which removed the exterior box from the packing state shown in FIG. 3 is an exploded perspective view of a plurality of members used for packing the image forming apparatus shown in FIG. 2; FIG. FIG. 4 is a perspective view of a foam among the plurality of members shown in FIG. 3 as viewed from the bottom side; 1 is a perspective view showing a cushioning member according to Embodiment 1; FIG. FIG. 2 is a plan view showing a cushioning member according to Embodiment 1; FIG. 7 is a cross-sectional view taken along line VII-VII shown in FIG. 6 and showing the configuration of the check valve; FIG. 8 is a cross-sectional view showing a state before the inlet portion of the check valve shown in FIG. 7 is welded; 4A and 4B are diagrams schematically showing a first welded portion, a second welded portion, and a third welded portion in the cushioning member according to the first embodiment; FIG. 1. It is a figure which shows a mode that the external force acted on the exterior box in the packing state shown in FIG. FIG. 11 is a plan view showing the cushioning member shown in FIG. 10 to which an external force is applied; FIG. 4 is a flowchart showing manufacturing steps of the cushioning member according to Embodiment 1; FIG. 8 is a plan view showing a cushioning member according to Embodiment 2; FIG. 11 is a plan view showing a cushioning member according to Embodiment 3; FIG. 11 is a plan view showing a cushioning member according to Embodiment 4; FIG. 11 is a plan view showing a cushioning member according to Embodiment 5;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments shown below, the case where the article to be packed is an image forming apparatus will be described as an example, but the article is not limited to this, and may be a relatively large precision machine such as a printer. Moreover, in the embodiments shown below, the same or common parts are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated. When there are a plurality of embodiments below, it is planned from the beginning to appropriately combine the features of each embodiment unless otherwise specified.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a packing state in which an image forming apparatus according to Embodiment 1 is packed. FIG. 2 is a diagram showing a state in which the exterior box is removed from the packing state shown in FIG. 3 is an exploded perspective view of a plurality of members used for packing the image forming apparatus shown in FIG. 2. FIG. A packing state in which the image forming apparatus 10 is packed will be described with reference to FIGS. 1 to 3 .

As shown in FIGS. 1 to 3, when packing the image forming apparatus 10, a pallet 11, a plate-like pad 12, a plurality of foams 13 to 16, a plurality of cushioning members 31 to 35, an outer box 21 and fixings are provided. Member 22 is used.

The pallet 11 is generally constructed by combining wooden plate materials. Note that the pallet 11 may be molded from a resin member. Positioning members 11A for positioning the plate-shaped pad 12 and the plurality of foam bodies 13 to 16 are provided at the four corners of the upper surface of the pallet 11. As shown in FIG. The positioning member 11A is, for example, a square bar or the like.

The plate-shaped pad 12 is generally formed by punching cardboard. Note that the plate-like pad 12 is not limited to cardboard, and may be formed of a resin member such as plastic.

Notch portions 12A are provided at the four corners of the plate-like pad 12 . The notch 12A engages with the positioning member 11A when the plate-like pad 12 is placed on the pallet 11. As shown in FIG. Thereby, the plate-shaped pad 12 is positioned.

The plate-shaped pad 12 is provided with a plurality of engagement holes 12B. The plurality of engagement holes 12B are used for positioning the plurality of foam bodies 13-16. A radial slit is provided around the engagement hole 12B.

The foams 13 to 16 are styrene foam moldings. The foams 13 to 16 are provided to support the bottom surface of the image forming apparatus 10 and contact the side surfaces of the main body 10C of the image forming apparatus 10. As shown in FIG. The foams 13 to 16 are formed according to the shapes of the four corners of the body portion 10C.

FIG. 4 is a perspective view of a foam among the plurality of members shown in FIG. 3, viewed from the bottom side. As shown in FIG. 4, the bottom surface of the foam 14 is provided with an engaging recess 17 recessed upward and an engaging projection 18 protruding downward. Engagement recesses 17 and engagement projections 18 are similarly provided for the foams 13, 15-16.

In each of the plurality of foam bodies 13-16, the engaging recess 17 engages with the positioning member 11A of the pallet 11, and the engaging protrusion 18 engages with the engaging hole 12B. Thereby, a plurality of foam bodies 13-16 are positioned.

As shown in FIGS. 1 to 3 again, the multiple cushioning members 31 to 35 are arranged at multiple corners of the image forming apparatus 10, respectively. For example, the plurality of cushioning members 31 to 34 are arranged at the four corners of the reading device 10A of the image forming apparatus 10. FIG. The cushioning members 35 are arranged at the corners of the discharge tray 10B of the image forming apparatus 10 .

A plurality of cushioning members 31 to 35 are bent at substantially central portions so as to abut on at least two surfaces of the reading device 10A forming corners. The bent portions of the plurality of cushioning members 31 to 35 are arranged to face the plurality of edge portions of the image forming apparatus 10, respectively.

The plurality of cushioning members 31 to 33 mainly abut on adjacent side surfaces among the plurality of side surfaces of the reading device 10A. The upper portions of the multiple cushioning members 31 to 33 are in contact with the upper surface of the reading device 10A. The cushioning member 34 abuts on the top and side surfaces of the reading device 10A. The cushioning member 34 abuts on two side surfaces of the main body 10C located near the discharge tray 10B.

When the outer box 21 covers the image forming apparatus 10 , the plurality of cushioning members 31 to 35 are sandwiched between the image forming apparatus 10 and the outer box 21 . A plurality of cushioning members 31 to 35 relieve the external force applied to the exterior box 21 . Details of the plurality of cushioning members 31 to 35 will be described later with reference to FIGS. 5 to 9. FIG.

When packing the image forming apparatus 10 , first, the plate-like pad 12 is placed on the pallet 11 and the plurality of foam bodies 13 to 16 are arranged on the plate-like pad 12 . Subsequently, the image forming apparatus 10 wrapped in a protective plastic bag (not shown) is placed on the plurality of foams 13 to 16, and the plurality of cushioning members 31 to 35 are placed on the corners of the image forming apparatus 10. placed in the department.

Next, with the plurality of cushioning members 31 to 35 arranged at the corners of the image forming apparatus 10, the exterior box 21 having an open bottom surface is covered so as to cover them. The exterior box 21 is made of, for example, cardboard. Subsequently, the exterior box 21 and the pallet 11 are fixed using a fixing member 22 such as a plastic tape.

As described above, an object to be packed such as the image forming apparatus 10 is packed using a plurality of cushioning members 31-35.

5 is a perspective view showing a cushioning member according to Embodiment 1. FIG. 6 is a plan view showing a cushioning member according to Embodiment 1. FIG. In addition, in FIG. 6, the portions that are mainly welded are indicated by thick black lines. A detailed structure of the cushioning member 33 among the plurality of cushioning members 31 to 35 will be described with reference to FIGS. 5 and 6. FIG. The structure of the other cushioning members 31-32 and 34-35 is substantially the same as that of the cushioning member 33, and therefore the description thereof is omitted here.

As shown in FIG. 5, the cushioning member 33 is formed by welding a first resin sheet 81 and a second resin sheet 82, which will be described later, in a bag shape. The cushioning member 33 has a plurality of housing bag portions 50 . Air as a medium is accommodated in each of the plurality of accommodation bag portions 50 . The plurality of housing bag portions 50 are arranged side by side in a predetermined direction.

The cushioning member 33 includes a first portion 331 in which a plurality of housing bag portions 50 are continuously arranged, a second portion 332 in which a single housing bag portion 50 is arranged away from the first portion 331 in the predetermined direction, and a connecting portion 56 that connects the first portion 331 and the second portion 332 .

The connection portion 56 is formed by welding the first resin sheet 81 and the second resin sheet 82 together in a belt shape. A notch portion 57 is provided in a substantially central portion of the connection portion 56 . The notch portion 57 is provided along the extension direction of the connecting portion 56 extending in a belt shape.

By providing the notch 57, the second portion 332 can be deformed independently. As a result, the second portion 332 can be brought into contact with the upper surface of the reader 10A while the first portion 331 is in contact with the two side surfaces of the reader 10A.

Note that the number of housing bag portions 50 provided in the first portion 331 and the second portion 332 can be changed as appropriate. Also, the cushioning member 33 may be formed to include only the first portion 331 or may be formed to include only the second portion 332 . The cushioning member 34 described above is formed to include only the first portion 331 .

As shown in FIG. 6, each buffer member 33 has a check valve 60, a plurality of storage bag portions 50 that store the medium injected from the inlet of each check valve 60, and a plurality of storage bags. In order to prevent the movement of the medium between the portions 50, a welded portion (third welded portion L3 to be described later) to which each inlet portion is welded is provided.

The plurality of housing bag portions 50 extend substantially linearly when viewed from above. The plurality of housing bag portions 50 have one end 50a and the other end 50b in their extending direction. An opening 55 is provided in each of the one ends 50 a of the plurality of housing bag portions 50 .

The plurality of housing bag portions 50 has a first chamber 51 , a second chamber 52 , a connection path 53 and two band-shaped welding portions 54 . The first chamber 51 and the second chamber 52 are arranged side by side in the direction opposite to the direction in which the later-described check valve 60 protrudes from the housing bag portion 50 . Specifically, the first chamber 51 and the second chamber 52 are arranged side by side along the extending direction of the housing bag portion 50 .

A connection path 53 connects the first chamber 51 and the second chamber 52 . The connection path 53 has a crank shape.

The two band-shaped welded portions 54 extend in a direction orthogonal to the extending direction of the housing bag portion 50 in plan view. The two belt-like welded portions 54 are alternately formed in the extending direction. As a result, the connection path 53 becomes crank-shaped as described above.

The cushioning member 33 further includes a plurality of flow paths 70 and an introduction path 80 . The plurality of flow paths 70 are provided adjacent to the plurality of housing bag portions 50, respectively. The plurality of flow paths 70 are provided on the one end 50a side of the plurality of housing bag portions 50, respectively. The plurality of flow paths 70 communicate with the plurality of housing bag portions 50 through openings 55, respectively. An introduction path 80 for introducing a medium is provided on the upstream side of the plurality of flow paths 70 . An introduction port 80a is provided in the introduction path 80, and the medium can be introduced through the introduction port 80a. The introduction path 80 is provided so as to be common to the plurality of flow paths 70 . Note that the introduction path 80 may be provided independently for each of the plurality of flow paths 70 .

The plurality of check valves 60 are provided in the openings 55 provided in each of the plurality of housing bag portions 50, respectively. The check valve 60 is provided in a range indicated by an arrow R1 shown in FIG. The check valve 60 allows the air introduced from the flow path 70 side to pass to the containing bag portion 50 side, and regulates the air flowing back from the containing bag portion 50 .

The check valve 60 is provided in a substantially straight line when viewed from above. Check valve 60 has a first end 60a and a second end 60b. A first end portion 60 a of the check valve 60 is positioned inside the housing bag portion 50 . A second end portion 60 b of the check valve 60 is positioned outside the housing bag portion 50 . Although the second end portion 60b is indicated by a white line in FIG. 6 for convenience, the second end portion 60b is welded by a third welding portion L3 (see FIG. 9), which will be described later.

FIG. 7 is a cross-sectional view taken along line VII--VII shown in FIG. As shown in FIG. 7, the check valve 60 has a first film 61 and a second film 62 . The first film 61 and the second film 62 are arranged to face each other.

As shown in FIGS. 6 and 7, the first film 61 and the second film 62 are bonded to the first resin sheet by a first welded portion L1 (see FIG. 9) and a second welded portion L2 (see FIG. 9) which will be described later. It is welded to 81 and second resin sheet 82 . Further, the outer edges of the first film 61 and the second film 62 forming the second end portion 60b of the check valve 60 are welded to the first resin sheet 81 and the second resin sheet 82 by the third welding portion L3. That is, the inlet portion of the check valve 60 is welded by the third weld portion L3.

Furthermore, the cushioning member 33 is provided with a fourth welded portion L4 that defines a flow path through which the medium that has passed through the opening 55 passes through the check valve 60 . The first film 61 and the second film 62 are welded to the first resin sheet 81 by the fourth welding portion L4.

Part of the air introduced into the containing bag portion 50 enters between the second film 62 and the second resin sheet 82 . As a result, the second film 62 is brought into close contact with the first film 61, and air leakage from the opening 55 can be suppressed.

A part of the inner surface of the first film 61 may be formed with a region R2 having a difficult-to-weld property so as not to be welded to the second film 62 . The region R2 is provided in the vicinity of the opening 55 in plan view. The region R<b>2 is provided so as to straddle the first welded portion L<b>1 that forms the boundary line between the inner side and the outer side of the housing bag portion 50 . Region R2 is provided so as to pass through opening 55 .

First resin sheet 81 and second resin sheet 82 have a laminated structure in which, for example, nylon and polyethylene are laminated. The melting temperature of the region R<b>2 provided in the first film 61 is set higher than the melting temperatures of the other portions of the first resin sheet 81 and the second resin sheet 82 .

8 is a sectional view showing a state before the inlet portion of the check valve shown in FIG. 7 is welded; FIG. As shown in FIG. 8, air as a medium is introduced into the storage bag portion 50 when the inlet portion of the check valve 60 is open. The air introduced from the introduction path 80 passes through the space between the first film 61 and the second film 62 in the flow path 70 and the opening 55 . The air that has passed through the opening 55 is introduced into the containing bag 50 . After being introduced into the containing bag 50, the second end 60b of the check valve 60 is welded as described above.

9A and 9B are diagrams schematically showing a first welded portion, a second welded portion, and a third welded portion in the cushioning member according to Embodiment 1. FIG. For convenience, the first welded portion L1, the second welded portion L2, and the third welded portion L3 are distinguished by hatching.

As shown in FIG. 9, the cushioning member 33 includes a first welded portion L1 indicated by first hatching with a wide interval, a second welded portion L2 indicated by second hatching with a medium interval, and a third hatching with a narrow interval. The third welding part L3 shown is provided. These first welded portion L1, second welded portion L2, and third welded portion L3 are welding lines formed when the first resin sheet 81 and the second resin sheet 82 are welded.

The first welded portion L1 partitions the plurality of housing bag portions 50 such that each of the housing bag portions 50 is provided with the opening 55 through which air can pass.

The second welded portion L2 is connected to the first welded portion L1 on both outer sides of the check valve 60 in a direction intersecting the direction in which the check valve 60 protrudes from the housing bag portion 50 . The second welded portion L2 defines the flow path 70 that communicates with the opening 55. As shown in FIG.

The second welded portions L2 extend in the direction in which the check valve 60 protrudes from the accommodating bag portion 50 from the first welded portions L1 at portions that define both ends of the accommodating bag portions 50 in the direction in which the plurality of accommodating bag portions 50 are arranged. provided to extend along the

The third welded portion L3 seals the flow path 70 . The third welded portion L3 is provided so as to intersect the check valve 60 that protrudes from the housing bag portion 50 . Specifically, the third welded portion L3 is provided along the second end portion 60b of the check valve 60 so as to connect one end side of the second welded portion L2.

In the vicinity of the second end portion 60b of the check valve 60, a region R2 is arranged so that the first resin sheet 81 and the second resin sheet 82 are melted at a temperature higher than that at which they are melted. Therefore, the third welded portion L3 is provided so as to cover the second end portion 60b.

The third welded portion L<b>3 is formed after air is filled into the housing bag portion 50 through the flow path 70 and the opening portion 55 .

FIG. 10 is a diagram showing how an external force acts on the exterior box in the packing state shown in FIG. Note that FIG. 10 shows the periphery of the right rear corner when the image forming apparatus is viewed from the front.

As shown in FIG. 10, when an external force acts on the exterior box 21 from the arrow AR1 direction in the drawing, the second chamber 52 of the housing bag portion 50 is pressed. As a result, the air in the second chamber 52 moves toward the first chamber 51 through the connection path 53 as indicated by AR2 in the drawing.

11 is a plan view showing the cushioning member to which the external force shown in FIG. 10 is applied; FIG. When the check valve is damaged or the pressure exceeds the sealing capacity of the check valve, as shown in FIG. passes through the opening 55 and moves into the channel 70 .

Here, the flow path 70 is sealed by a third welded portion L3 provided so as to intersect the check valve 60. As shown in FIG. The space of the sealed flow path 70 is considerably smaller than the configuration in which a space capable of storing air is also formed on the upstream side of the check valve 60 . Therefore, the amount of air that leaks from the storage bag portion 50 through the check valve 60 into the flow path 70 can be considerably reduced. As a result, in the cushioning member 33 according to Embodiment 1, deterioration of the cushioning function can be suppressed.

Furthermore, as described above, in the cushioning member 33, the first chamber 51 and the second chamber 52 are formed in the housing bag portion 50, and the first chamber 51 and the second chamber 52 are connected in a crank shape. It is connected by path 53 . In this configuration, when the cushioning member 33 is pressed, the connection path 53 acts as a resistance, and part of the pressing energy is consumed when the air moves from the first chamber 51 to the second chamber 52. be done. Further, since the air is compressed in the second chamber 52, part of the pressing energy is consumed in this process as well. Furthermore, since the second chamber 52 spreads the exterior box 21, part of the pressing energy is consumed in this process as well. The buffering function is exhibited by the action as described above.

(Production method)
FIG. 12 is a flowchart showing manufacturing steps of the cushioning member according to Embodiment 1. FIG. A method of manufacturing the cushioning member according to the first embodiment will be described with reference to FIG.

As shown in FIG. 12, when manufacturing the cushioning member 33 according to Embodiment 1, in step S10, the first resin sheet 81 and the second resin sheet 82 are welded in a bag shape, and each A plurality of containing bags 50 capable of containing a medium are formed so as to have valves.

Specifically, the first film 61 and the second film 62 are arranged facing each other in the region where the check valve 60 is formed, and the first film 61 and the second film 62 are sandwiched between the first resin sheet 81 and the second resin sheet 82 . The first resin sheet 81 and the second resin sheet 82 are superimposed.

Next, a first welded portion L1 that partitions the storage bag portion 50 so as to form an opening 55 through which the medium can pass, and a second welded portion L2 that defines a flow path communicating with the opening 55 are formed.

Specifically, from the first resin sheet 81 and the second resin sheet 82 in the portion where the first film 61 and the second film 62 are sandwiched, the first resin sheet in the portion where the first film 61 and the second film 62 are not sandwiched is removed. A plurality of welding lines extending continuously from the resin sheet 81 and the second resin sheet 82 are formed at intervals in a predetermined direction. Also, the welding lines are formed so as to connect one end sides of the plurality of welding lines in the portion where the first film 61 and the second film 62 are not sandwiched. Furthermore, a welding line is formed along the predetermined direction so that the opening 55 is formed in the portion where the first film 61 and the second film 62 are sandwiched. Thereby, the first welded portion L1 and the second welded portion L2 are formed. As a result, a plurality of housing bag portions 50, a plurality of check valves 60, a flow path 70, and an introduction path 80 are formed.

A plurality of check valves 60 are formed in a row, and the weld line is formed to include a weld line defining a boundary between adjacent check valves 60 .

The second end portion 60b of the check valve 60 is not welded, so that an inlet portion through which a medium can be introduced is formed on the second end portion 60b side of the check valve 60. becomes. The inlets of the plurality of check valves are formed so as to be positioned on the same straight line.

Further, a part of the first film 61 and the second film 62 located in the housing bag portion 50 and the first resin sheet 81 are welded to each other so that the medium passing through the opening 55 flows through the check valve 60 . A fourth welded portion L4 is formed to define a path.

Also, in each housing bag portion 50, parts of the first resin sheet 81 and the second resin sheet 82 are welded to form two belt-like welded portions 54. As shown in FIG. The two strip-shaped welded portions 54 are alternately formed in the extending direction of the containing bag portion 50 . Thereby, the first chamber 51 and the second chamber 52 arranged side by side in the direction opposite to the direction in which the check valve 60 protrudes from the accommodating bag portion 50 and the crank connecting the first chamber 51 and the second chamber 52 are arranged. A shaped connection path 53 is formed.

Next, in step S<b>20 , air as a medium is introduced into each of the plurality of storage bag portions 50 via the check valve 60 from the introduction path 80 provided upstream of the check valve 60 . The air introduced into the introduction path 80 is introduced into the housing bag portion 50 through the flow path 70 and the opening 55 .

Next, in step S30, after introducing the medium into each of the plurality of storage bag portions 50, the inlet portions of the respective check valves are welded. Specifically, a third welded portion L3 that is connected to the second welded portion L2 and seals the flow path 70 is formed. At this time, the third welded portion L3 is provided so as to intersect the check valve 60 that protrudes from the housing bag portion 50 . That is, the welded portion that welds the inlet portion of the check valve 60 is provided so as to intersect the welded line defining the boundary of the check valves 60 adjacent to each other. Further, the third welded portion L3 is provided so as to cover the second end portion 60b of the check valve 60. As shown in FIG. In this manner, the inlet portions of the plurality of check valves 60 are welded to prevent the medium from moving between the plurality of storage bags 50 .

Through the steps described above, the cushioning member 33 according to the first embodiment can be manufactured.

(Embodiment 2)
13 is a plan view showing a cushioning member according to Embodiment 2. FIG. A cushioning member 33A according to the second embodiment will be described with reference to FIG.

As shown in FIG. 13, the cushioning member 33A according to Embodiment 2 differs from the cushioning member 33 according to Embodiment 1 in the configuration of the first film 61, and the position of the third welded portion L3 is different. is different. Other configurations are substantially the same.

In the second embodiment, the portion of first film 61 protruding from opening 55 is not formed with a difficult-to-weld region so as not to be welded to second film 62 . Therefore, it is possible to use the entire area continuous from the second end portion 60b of the check valve 60 to the first welded portion L1 of the portion forming the boundary line between the housing bag portion 50 and the outside as the welded region. ing.

The third welded portion L3 is provided between the second end portion 60b of the check valve 60 and the accommodation bag portion 50 at a position closer to the accommodation bag portion 50 . Specifically, the third welded portion L3 is provided near one end 50a of the housing bag portion 50 .

In the cushioning member 33A according to the second embodiment, the third welded portion L3 is provided in the vicinity of the one end 50a of the housing bag portion 50, so that the housing bag portion 50 is pressed more than in the first embodiment. , the amount of air moving to the flow path 70 can be reduced. As a result, compared with the first embodiment, deterioration of the buffer function can be further suppressed.

The cushioning member 33A according to the second embodiment can be manufactured according to the manufacturing method of the cushioning member 33 according to the first embodiment.

Further, in the second embodiment, a region R2 having a difficult-to-weld property may be provided as in the first embodiment. In this case, the difficult-to-weld region R2 can be welded by welding at a temperature equal to or higher than the melting point of the difficult-to-weld portion.

(Embodiment 3)
14 is a plan view showing a cushioning member according to Embodiment 3. FIG. A cushioning member 33B according to the third embodiment will be described with reference to FIG.

As shown in FIG. 14, the cushioning member 33B according to the third embodiment differs from the cushioning member 33 according to the first embodiment in the configuration of the opening and the number of check valves 60. As shown in FIG. Other configurations are substantially the same.

In Embodiment 3, the opening 55 includes a first opening 551 and a second opening 552 arranged side by side in a direction intersecting the direction in which the check valve 60 protrudes from the housing bag 50 . A stop valve 60 is provided at each of the first opening 551 and the second opening 552 .

Even with such a configuration, the cushioning member 33B according to the third embodiment can obtain substantially the same effects as those of the first embodiment.

When the width of the accommodation bag portion 50 is increased, the introduction of air into the accommodation bag portion 50 becomes easier by providing the first opening 551 and the second opening 552 as described above.

The cushioning member 33B according to the third embodiment can be manufactured according to the manufacturing method of the cushioning member 33 according to the first embodiment.

(Embodiment 4)
15 is a plan view showing a cushioning member according to Embodiment 4. FIG. A cushioning member 33C according to the fourth embodiment will be described with reference to FIG.

As shown in FIG. 15, a cushioning member 33C according to the fourth embodiment differs from the cushioning member 33 according to the first embodiment in that a part of the second welded portions L2 has a different shape. Other configurations are substantially the same.

At least, the tip of the second welded portion L2 connected to the first welded portion L1 defining the boundary between the adjacent storage bag portions 50 is provided so as to include a rounded portion 90 . Further, the rounded tip of the second welded portion L2 is provided so as to protrude from the third welded portion L3.

In other words, at least the extremities of the weld lines defining the boundaries of adjacent check valves 60 are provided to include rounded portions 90 . Further, the rounded end of the welding line is provided so as to protrude from the welding portion where the inlet portion of the check valve 60 is welded.

The tip side of the second welded portion L2 may be semicircular or circular. Also, the tip of the second welded portion L2 may be semi-oval or oval. The tip side of the second welded portion L2 may have a polygonal shape with rounded corners.

The cushioning member 33C according to the fourth embodiment can be manufactured according to the manufacturing method of the cushioning member 33 according to the first embodiment. In this case, in the step (S10) of forming a plurality of storage bag portions 60, the welding lines are welded so that at least the ends of the welding lines that define the boundaries of the check valves 60 adjacent to each other include rounded portions. form a line. Furthermore, in the step of welding the inlet of the check valve 60 (S30), the welded portion is formed such that the tip of the weld line protrudes beyond the welded portion that welds the inlet of the check valve 6 . This makes it possible to easily form the welded portion.

Even with such a configuration, the cushioning member 33C according to the fourth embodiment can obtain substantially the same effects as those of the first embodiment.

Since the tip of the second welded portion L2 is formed to be rounded, the first resin sheet 81 and the second resin sheet 82 have a columnar shape in the step of introducing the medium into the plurality of storage bag portions (S20). The rounded portion can disperse the force with which each sheet is pulled by the tip of the second welded portion L2 when the sheet expands to the full. As a result, damage to the first resin sheet 81 and the second resin sheet 82 can be suppressed.

(Embodiment 5)
16 is a plan view showing a cushioning member according to Embodiment 5. FIG. A cushioning member 33D according to Embodiment 5 will be described with reference to FIG.

As shown in FIG. 16, a cushioning member 33D according to the fifth embodiment differs from the cushioning member 33 according to the first embodiment in that the welding line that defines the upstream boundary of the mutually adjacent check valves 60 is The difference is that they are not formed. That is, in the cushioning member 33D according to Embodiment 5, the second welded portion L2 that is connected to the first welded portion L1 in the portion that defines the boundary between the storage bag portions 50 that are adjacent to each other is not formed.

In this case, the channel 70 communicating with the plurality of storage bag portions 50 is widened. Therefore, the width of the third welded portion L3 is increased so as to reduce the amount of air that leaks into the flow path 70 through the openings 55 when the plurality of housing bag portions 50 are pressed from the outside. there is

On the other hand, as in Embodiments 1 to 4, when the second welded portion L2 is formed to be connected to the first welded portion L1 in the portion defining the boundary between the adjacent storage bag portions 50, The width of the third welded portion L3 can be narrowed. Therefore, the third welded portion L3 can be easily formed.

Even if it is configured as described above, the cushioning member 33D according to the fifth embodiment can obtain substantially the same effects as those of the first embodiment.

The cushioning member 33D according to the fifth embodiment can be manufactured according to the manufacturing method of the cushioning member 33 according to the first embodiment. In this case, in the step (S10) of forming a plurality of housing bag portions 60, weld lines that define boundaries on the upstream side of mutually adjacent check valves 60 are not formed.

In the first to fifth embodiments described above, the case where air is used as a medium has been described as an example, but the medium is not limited to this, and gas such as nitrogen may be used. There may be.

In Embodiments 1 to 5 described above, the case where the cushioning member is manufactured by welding a plurality of resin sheets has been exemplified and explained, but the present invention is not limited to this, and a single resin sheet is folded back. The cushioning member may be manufactured by being welded.

In Embodiments 1 to 4 described above, in the step of forming the plurality of housing bag portions 50, the check valves 60 included in the plurality of housing bag portions 50 are formed so as to line up in a row, and In the step (S30) of forming a welding line that defines the boundary of the check valves 60 adjacent to each other and welding the inlet portions of the check valves 60, the welding portion is formed so as to intersect the welding line. However, it is not limited to this. In the step (S10) of forming the plurality of storage bag portions 60, the check valves 60 of the plurality of storage bag portions 50 are aligned without forming a welding line that defines the boundary between the check valves 60 adjacent to each other. You may form so that it may line up in a shape. In this case, in the step of welding the inlet portion of the check valve 60 (S30), a weld line defining the boundary between adjacent check valves is formed, and the welded portion is formed so as to intersect the weld line. preferably formed.

As described above, the embodiments invented this time are illustrative in all respects and are not restrictive. The scope of the present invention is indicated by the scope of claims, and includes all modifications within the meaning and scope of equivalence to the scope of claims.

REFERENCE SIGNS LIST 10 image forming apparatus 10A reading device 10B discharge tray 10C main body 11 pallet 11A positioning member 12 plate-like pad 12A notch 12B engagement hole 13, 14, 15, 16 foam 17 Engagement concave part 18 Engagement projection 21 Outer box 22 Fixing member 31, 33, 33A, 33B, 34, 35 Cushioning member 50 Storage bag part 50a One end 50b Other end 51 First chamber 52 Second 2 chambers, 53 connection path, 54 belt-like welding portion, 55 opening, 56 connection portion, 57 notch, 60 check valve, 60a first end, 60b second end, 61 first film, 62 second film , 65, 66 fixed portion, 70 flow path, 80 introduction path, 81 first resin sheet, 82 second resin sheet, 331 first portion, 332 second portion, 551 first opening, 552 second opening, L1 First weld, L2 Second weld, L3 Third weld.

Claims (14)

A cushioning member in which a resin sheet is welded in the shape of a bag,
a storage bag that stores the medium;
a first welding portion that partitions the storage bag portion so that the storage bag portion is provided with an opening through which the medium can pass;
having a first end and a second end, the first end positioned inside the containing bag and the second end positioned outside the containing bag in the opening; a check valve provided;
the medium housed in the housing bag;
A second weld that is connected to the first weld on both outer sides of the check valve in a direction that intersects the direction in which the check valve protrudes from the housing bag, and that defines a flow path that communicates with the opening. Department and
a third welded portion that is connected to the second welded portion and seals the flow path;
The buffer member, wherein the third welded portion is provided so as to intersect the check valve at a portion protruding from the housing bag portion. 2. The cushioning member according to claim 1, wherein said third welded portion is provided between said second end portion and said housing bag portion at a position closer to said housing bag portion. The opening includes a first opening and a second opening arranged side by side in a direction intersecting the direction in which the check valve protrudes from the housing bag,
3. The cushioning member according to claim 1, wherein said check valve is provided in each of said first opening and said second opening. The accommodation bag portion connects the first chamber and the second chamber with a first chamber and a second chamber arranged side by side in a direction opposite to a direction in which the check valve protrudes from the accommodation bag portion. 4. A damping member according to any one of claims 1 to 3, comprising a crank-like connection path. 5. The cushioning member according to claim 4, wherein said accommodation bag portion is provided so as to be bendable along said connection path. A plurality of the housing bag portions are provided side by side,
The second welded portion extends from the first welded portion of a portion defining both ends of the accommodating bag portion in the direction in which the plurality of accommodating bag portions are arranged in a direction in which the check valve protrudes from the accommodating bag portion. 6. A damping member according to any one of the preceding claims, provided to extend along. 7. The cushioning member according to claim 6, wherein a tip of said second welded portion connected to said first welded portion defining a boundary between said housing bag portions adjacent to each other includes a rounded portion. The tip of the second welded portion connected to the first welded portion defining a boundary between the adjacent housing bag portions is provided so as to protrude from the third welded portion. 8. The cushioning member according to 7. A cushioning member in which a resin sheet is welded in the shape of a bag,
a plurality of containing bag portions each having a check valve and containing a medium introduced from an inlet portion of each of the check valves;
a welding portion to which each of the inlet portions is welded to prevent movement of the medium between the plurality of storage bag portions;
The check valves included in the plurality of storage bags are arranged in a row,
a weld line defining boundaries of the check valves adjacent to each other;
The welding part is provided so as to cross the welding line,
The cushioning member, wherein the tip of the weld line includes a rounded portion. 10. The cushioning member of claim 9, wherein the inlets of each of the check valves are collinear. 10. The cushioning member according to claim 9, wherein said tip of said welding line is provided so as to protrude from said welding portion. A method for manufacturing a cushioning member in which a resin sheet is welded in a bag shape, comprising:
a step of welding the resin sheet into a bag shape to form a plurality of containing bag portions capable of containing a medium, each having a check valve;
a step of introducing a medium into the storage bag via the check valve from an introduction path provided upstream of the check valve;
a step of welding the inlet portion of the check valve after introducing the medium into the containing bag portion;
In the step of forming the plurality of storage bag portions, the check valves of each of the plurality of storage bag portions are formed in a row, and welding defines a boundary between the check valves adjacent to each other. form a line
forming a welded portion so as to cross the welded line in the step of welding the inlet portion;
A method of manufacturing a cushioning member, wherein in the step of forming the plurality of housing bag portions, the welding line is formed so that the tip of the welding line includes a rounded portion. 13. The method according to claim 12, wherein in the step of forming the plurality of housing bag portions, the inlet portions of the check valves of the plurality of housing bag portions are formed so as to be positioned on the same straight line. A method for manufacturing a cushioning member. 13. The method of manufacturing a cushioning member according to claim 12, wherein in the step of welding the inlet portion, the welded portion is formed so that the tip of the weld line protrudes from the welded portion.

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