CN110775440A

CN110775440A - Packaging member

Info

Publication number: CN110775440A
Application number: CN201910663684.6A
Authority: CN
Inventors: 岩本和幸
Original assignee: Canon Inc
Current assignee: Canon Inc
Priority date: 2018-07-25
Filing date: 2019-07-23
Publication date: 2020-02-11
Also published as: JP2020015519A; JP7204364B2; US20200031558A1

Abstract

A packing member for packing a sheet feeding device includes a packing bag, a first cushioning material, a second cushioning material, a connecting member connecting the first cushioning material and the second cushioning material, a third cushioning material, and a tubular member. The first cushioning material and the second cushioning material are in contact with the inner surface of the tubular member by the elastic force of the connecting member and the tension of the packing bag generated as the first cushioning material, the second cushioning material, and the third cushioning material are installed.

Description

Packaging member

Technical Field

The present invention relates to a packaging member for packaging a sheet feeding device or the like mounted in an image forming apparatus.

Background

Products such as a sheet feeding device installed in an image forming apparatus are packaged by a packaging member so as to prevent vibration during transportation and breakage due to impact when the sheet feeding device is shipped from a factory. In the packing member, a cushioning material is provided.

Fig. 7 is an exploded perspective view of the packing member disclosed in japanese laid-open patent application (JP- ｃA) 2010-89836. As shown in fig. 7, the packing member 200 is constituted by a packing box (tubular member) 103 having a rectangular column and box-like shape whose bottom is open and which packs the product 101, and by the base member 102 and the cushioning material 105. These members are integrated into one unit by engaging the joint members 106 in the engaging holes 102a of the base member 102 and the engaging holes 103a of the packing case 103.

Further, at the side surface of the packing case 103, an engaging piece 103a capable of being bent inward is provided. The engaging piece 103a is caught and engaged in the groove portion 105a formed on the cushioning material 105 by bending. With this configuration, the packing case 103 holds the cushioning material 105 by the joining pieces 103a, and the packing case 103 can be removed together with the connecting member 105 when the packing case 103 is disassembled during unpacking.

However, in the construction disclosed in JP-A2010-89836, in order to reuse the packing member (material), it is necessary to repeatedly bend and stretch the engaging pieces 103a of the packing case 103. In this case, there is a possibility that the joint pieces 103a of the packing case 103 become fatigued and broken.

Disclosure of Invention

The present invention has been achieved in view of the above circumstances, and a main object of the present invention is to provide a packing member in which a tubular member and a connecting member are unpacked at the same time and are easily reused.

According to an aspect of the present invention, there is provided a packing member for packing a sheet feeding device for feeding a sheet, wherein the sheet feeding device includes an upper surface having a substantially rectangular shape and a bottom portion having an area larger than an area of the upper surface, the packing member comprising: a packaging bag made of polyethylene or polypropylene and configured to package the sheet feeding device; a first cushioning material that includes a first engaging portion and is attached to a corner portion of an upper surface of the sheet feeding device in a state in which the sheet feeding device is packed in the package bag; a second cushioning material that includes a second engaging portion and is attached to a corner portion of an upper surface of the sheet feeding device in a state in which the sheet feeding device is packed in the package bag, wherein the corner portion to which the second cushioning material is attached is adjacent to the corner portion to which the first cushioning material is attached; a connecting member that connects the first cushioning material and the second cushioning material and includes a first curved portion that is curved so as to engage with the first engaging portion and a second curved portion that is curved so as to engage with the second engaging portion and is opposed to the first curved portion by the sheet feeding device in a curved state; and a third cushioning material mounted to a bottom of the sheet feeding device in a state in which the sheet feeding device is packed in the packing bag; and a tubular member that accommodates the sheet feeding device in a state in which the first cushioning material, the second cushioning material, and the third cushioning material are attached to the sheet feeding device, wherein the first cushioning material and the second cushioning material are in contact with an inner surface of the tubular member by an elastic force of the connecting member and a tension of the packing bag generated as the first cushioning material, the second cushioning material, and the third cushioning material are attached.

Drawings

Fig. 1 is an exploded perspective view of a packing member.

Fig. 2 is a perspective view of an upper cushioning material.

Fig. 3 is a perspective view of the cushioning material in the upper cushioning material.

Fig. 4 is a sectional view of a packing member in which a sheet feeding device is packed.

FIG. 5 is a perspective view of an upper cushioning material.

Fig. 6 is a perspective view of a cushioning material in an upper cushioning material.

Fig. 7 is an exploded perspective view of a conventional packing member.

Detailed Description

(first embodiment)

< packaging Member >

Hereinafter, first, a general structure of a packing member according to a first embodiment will be described with reference to the drawings. Incidentally, unless otherwise specified, the sizes, materials, shapes, relative arrangements, and the like of the constituent members described in the following embodiments are not intended to limit the scope of the present invention only to these.

Fig. 1 is an exploded perspective view of a packing member 50. As shown in fig. 1, the packing member 50 is constituted by the packing box 42, the upper cushion material 30, the packing bag 41, the lower cushion material 20, and the base member 11. Further, in the packing member 50, the sheet feeding device 100 is to be mounted to a lower portion of an unillustrated image forming apparatus for forming an image on a sheet.

The sheet feeding device 100 is an optional product to be externally attached to an image forming apparatus, not shown, and is a device for feeding a sheet toward an image forming portion for forming an image on the sheet. The sheet feeding apparatus 100 includes a sheet cassette (not illustrated), a sheet feeding roller (not illustrated), and a conveying roller (not illustrated), and sends the sheets stacked on the sheet cassette toward the image forming portion by the sheet feeding roller and the conveying roller.

Further, the sheet feeding device 100 includes an upper surface 100a having a substantially rectangular shape, and has a shape such that the area of a bottom (surface) 100b is larger than the area of the upper surface 100 a. Incidentally, the substantially rectangular shape mentioned herein includes a shape such that corner portions of the rectangular shape are curved surfaces and a shape such that the corner portions are chamfered. Further, a caster 100c for moving the sheet feeding device 100 is attached to the bottom 100 b.

The packing bag 42 (tubular member) is a member having a rectangular column and box-like shape, the bottom of which is open. The packing bag 42 is formed of a packing material such as corrugated cardboard (board) including plastic corrugated cardboard. The packing bag 42 is constituted by a top plate 42b covering the upper surface 100a of the sheet feeding apparatus 100 and four side plates 42a covering the side surfaces of the sheet feeding apparatus 100.

The base member 11 is formed with a tray or the like made of wood so as to bear the weight of the sheet feeding device 100. At four side surfaces of the base member 11, fork insertion portions 11a for allowing insertion of forks of a forklift are formed, respectively.

The package 41 is a so-called plastic made of polyethylene or polypropylene. The packing bag 41 packs the sheet feeding device 100 and prevents contamination and scratches of the sheet feeding device.

The upper cushioning material 30 is constituted by four cushioning materials 34(34a to 34d) mounted respectively to four corner portions of the upper surface 100a of the sheet feeding device 100 in a packaged state in which the sheet feeding device 100 is packaged in the packaging bag 41, and by a connecting member 35 connecting the four cushioning materials 34. The cushioning material 34 is formed of expanded (foamed) polystyrene. The connecting member 35 is formed of a packaging material such as corrugated cardboard including plastic corrugated cardboard. The upper cushion material 30 not only suppresses the application of external force to the sheet feeding device 100, but also prevents positional deviation of the sheet feeding device 100 within the packing member 50.

The lower cushion material 20 (third cushion material) is constituted by two cushion materials 21(21a and 21d) mounted to the bottom 100b of the sheet feeding device 100 in a packaged state in the packaging bag 41, and by an intermediate member 23 provided between the two cushion materials 21. The cushioning material 21 is formed of expanded (foamed) polystyrene. The intermediate member 23 is formed of a packaging material such as corrugated cardboard including plastic corrugated cardboard. The lower cushion material 20 not only suppresses the application of an external force to the sheet feeding apparatus 100, but also prevents positional deviation of the sheet feeding apparatus 100 within the packing member 50. Incidentally, by bending a part of the intermediate member 23, the interval between the cushioning materials 21a and 21b can be defined.

< Upper buffer >

Next, the structure of the upper cushioning material 30 will be specifically described.

Fig. 2 is a perspective view of the upper cushioning material 30. Fig. 3 is a perspective view of the cushioning material 34 in the upper cushioning material 30.

As shown in fig. 2 and 3, the cushioning materials 34a-34d are provided with slits 34x and chamfered portions 34 z. Further, the connecting member 35 is provided with a first bent portion 35a bent downward at one end thereof and a second bent portion 35b bent downward at the other end thereof. The first curved portion 35a and the second curved portion 35b are opposed to each other by the sheet feeding device 100.

The first curved portion 35a is engaged in a slit 34x (first engaging portion) formed in

cushioning materials

34a and 34c (first cushioning materials), which cushioning

materials

34a and 34c are attached to adjacent (two) corner portions of the upper surface 100a of the sheet feeding device 100. The second curved portion 35b is engaged in a slit 34x (second engaging portion) formed in

cushioning materials

34b and 34d (second cushioning materials), which cushioning

materials

34b and 34d are attached to adjacent (two) corner portions of the upper surface 100a of the sheet feeding device 100. Thus, the four connecting members 34 are connected to each other by the connecting members 35. Further, by adjusting the bent portion of the connection member 35, the interval of the

cushioning materials

34a and 34c and the

cushioning materials

34b and 34d can be defined.

That is, the connecting member 35 includes a first bent portion 35a bent so as to be engaged in the slits 34x formed in the

cushioning materials

34a and 34c, and includes a second bent portion 35b bent so as to be engaged in the slits 34x formed in the

cushioning materials

34b and 34 d. Further, the first curved portion 35a and the second curved portion 35b are opposed to each other by the sheet feeding device 100 in a curved state. Further, the

cushioning materials

34b and 34d are attached to corner portions different from the corner portions to which the

cushioning materials

34a and 34c are attached.

< packaging method >

Next, a packing method of the packing member 50 will be described.

When the sheet feeding device 100 is wrapped by the wrapping member 50, first, two cushioning materials 21 in the lower cushioning material 20 are placed on the base member 11 so as to be opposed to each other. Then, the intermediate member 23 is placed at a position between the two cushioning materials 21.

Next, the sheet feeding apparatus 100 is packaged by the packaging bag 41. Thereafter, the cushioning materials 21a and 21b are attached to the bottom 100b of the sheet feeding apparatus 100 in a packaged state, so that the sheet feeding apparatus 100 is placed on the lower cushioning material 20.

Next, four cushioning materials 34 of the upper cushioning material 30 are mounted so as to cover four corner portions of the upper surface 100a of the sheet feeding device 100. Thereafter, the connecting member 35 is bent corresponding to the intervals of the four cushioning materials 34, thereby forming a first bent portion 35a and a second bent portion 35 b. Then, the first curved portion 35a and the second curved portion 35b are engaged in the slit 34x of the cushioning material 34.

Next, the opening portion of the packing case 42 is disposed downward, and the above-prepared structure is covered with the packing case 42 from above. That is, the packing case 42 accommodates the sheet feeding device 100 packed in the packing bag 41 in a state where the lower cushion material 20 and the upper cushion material 30 are mounted to the sheet feeding device 100. Here, the cushioning material 34 is provided with the chamfered portion 34z, and therefore, the structure is easily covered with the packing case 42 from above. Thus, the packing operation is completed.

< force acting on packaging Member >

Next, a force acting on the packing member 50 in the packed state of the sheet feeding device 100 will be described.

Fig. 4 is a sectional view of the packing member 50 in a state where the sheet feeding device 100 is packed in the packing member 50. As shown in fig. 4, in a state where the sheet feeding apparatus 100 is packed in the packing member 50, the four cushioning materials 34 mounted to the sheet feeding apparatus 100 are sized so as to contact the inner surfaces of the top panel 42b and the side panel 42a of the packing box 42, respectively.

Here, with the connecting member 35, an elastic force for opening the bent portions acts on the first bent portion 35a and the second bent portion 35 b.

Further, as shown in fig. 1, the interval between the contact surface of the

cushioning materials

34a and 34c with the side plate 42a and the contact surface of the cushioning materials 34b and 34D with the other (opposite) side plate 42a is D2. Further, the interval as the interval between the inner surfaces of the opposite side plates 42a of the packing box 42, the contact surfaces of the packing box 42 with the

cushioning materials

34a and 34c, and the contact surfaces of the packing box 42 with the cushioning materials 34b and 34D is D1. At this time, in the case of D1< D2, when the structure is covered by the packing box 42, the portion between the first curved portion 35a and the second curved portion 35b of the connection member 35 is curved in the up-down direction, so that the elastic force by which the curved portions return to the original positions acts on the connection member 35.

These elastic forces of the connecting members 35 act as a force for pressing the inner surfaces of the side plates 42a of the packing case 42 outward through the cushioning material 34. Incidentally, D1< D2 is satisfied, so that although the structure is not easily covered by the packing box 42, the problem can be solved by providing the chamfered portion 34z of the cushioning material 34. Further, in the case of mounting the upper cushion material 30 and the lower cushion material 20 to the sheet feeding device 100, at a portion 41a between a portion of the packaging bag 41 contacting the lower cushion material 20 and a portion of the packaging bag 41 contacting the upper cushion material 30, tension is generated by stretching the portion 41a by the lower cushion material 20 and the upper cushion material 30. This tension acts as a force that presses the cushioning material 34 toward the inner surface of the side panel 42a of the packing box 42.

That is, the elastic force of the connecting member 35 and the tension of the packing bag 41 described above serve as a force F1 (fig. 4) that presses the cushioning material 34 against the packing box 42. That is, the cushioning material 34 is pressed into contact with the inner surfaces of the side panels 42a of the packing box 42 by the force F1. On the other hand, the cushioning material 34 is mounted to the sheet feeding apparatus 100, and therefore, although the force F2 (fig. 2) for pressing the cushioning material 34 toward the sheet feeding apparatus 100 by the packing bag 41 also has some effect, the force F2 is smaller than the force F1.

For this reason, when the maximum static friction force between the cushioning material 34 and the packing box 42: fmax1 ═ μ 1 xf 1 and the maximum static friction between the cushioning material 34 and the package 41: fmax1> fmax2 when fmax2 ═ μ 2 xf 2 are compared with each other. Here, μ 1 represents a friction coefficient between the cushioning material 34 and the packing case 42, and μ 2 represents a friction coefficient between the cushioning material 34 and the packing case 41.

Therefore, the cushioning material 34 is in press contact with the packing box 42, whereby the frictional force between the cushioning material 34 and the packing box 42 becomes strong, and the upper cushioning material 30 is held by the packing box 42. Therefore, when the packing case 42 is detached from the sheet feeding device 100 during unpacking of the packing member 50, the upper cushioning material 30 can be detached together with the packing case 42.

Incidentally, generally, the corrugated cardboard has a higher friction coefficient than a plastic bag. An actually measured value of the friction coefficient μ 1 between the cushioning material 34 and the packing case 42 used in this embodiment is 0.31, and an actually measured value of the friction coefficient μ 2 between the cushioning material 34 and the packing case 41 used in this embodiment is 0.21, which is μ 2. However, in the case of using the packing case 42 made of plastic corrugated cardboard, the main material of the plastic corrugated cardboard is polypropylene, and therefore, the friction coefficient between the cushioning material 34 and the packing case 42 can be equivalent to the friction coefficient between the cushioning material 34 and the packing bag 41. Even in this case, the above-described relationship F1> F2 is satisfied by the elastic force of the connecting member 35 and the tension of the packing bag 41. For this reason, fmax1, which is the maximum static friction force between the cushioning material 34 and the packing box 42, is larger than fmax2, which is the maximum static friction force between the cushioning material 34 and the packing bag 41 (fmax1> fmax 2). Therefore, when the packing box 42 is detached, the upper cushion material 30 is detached together with the packing box 42, but the packing bag 41 remains as it is.

Further, the cushioning material 34 is held by the packing case 42 by the above-described frictional force, and therefore, when the packing case 42 is detached from the sheet feeding apparatus 100 and when the sheet feeding apparatus 100 is covered with the packing case 42 again, these operations can be performed without bending the packing case 42 and the upper cushioning material 30. Therefore, the packing case 42 and the upper cushioning material 30 do not easily become fatigued, and thus are more easily reused than the conventional structure. Therefore, according to the configuration of the embodiment, not only can the packing case 42 and the upper cushioning material 30 be simultaneously detached (unpacked) from the sheet feeding device 100, but also the packing member 50 can be easily reused.

Further, with respect to the detaching direction of the packing box 42 (upward direction in fig. 4), the contact distance of the cushioning material 34 with the inner surface of the side plate 42a of the packing box 42 is L1 (fig. 4), and the contact distance of the cushioning material 34, the packing bag 41, and the sheet feeding device 100 is L2 (fig. 4). At this time, L1> L2 may be preferably satisfied. In this embodiment, L1-110 mm and L2-60 mm. Therefore, as in the case of using plastic corrugated cardboard as the material of the packing case 42, even in the case where the force F1 and the force F2 are substantially equal to each other and the values of the friction coefficients are substantially the same, when the packing case 42 is detached, the contact distances L1 and L2 are reduced accordingly. Therefore, in the case where the cushioning material 34 is separated from the sheet feeding device 100 packaged by the packaging bag 41 (L2 ≠ 0), the packaging box 42 and the cushioning material 34 maintain a contact state therebetween in the region of L1-L2(≠ 0), and thus, the cushioning material 34 is in a contact state with the packaging box 42. Therefore, the cushioning material 34 can be easily held by the packing box 42.

Incidentally, after the packing case 42 is detached during unpacking of the packing member 50, the sheet feeding device 100 placed in a packed state by the packing bag 41 is detached from the lower cushion material 20 by lifting the sheet feeding device 100 from the lower cushion material 20. Thereafter, the packaging bag 41 is removed from the sheet feeding apparatus 100. Thus, the unpacking of the packing member 50 is completed. Further, when collecting the packing member 50, the packing bag 41 is placed on the lower cushion material 20 and covered with the packing box 42 placed in a state where the upper cushion material 30 is held, thereby collecting the packing member 50.

(second embodiment)

Next, a second embodiment of the packing member according to the present invention will be described. By using the same drawings and by adding the same reference numerals or symbols, description of portions overlapping with the first embodiment in the description will be omitted.

Fig. 5 and 6 are perspective views of the upper cushion material 30 and the cushion material 34 in the upper cushion material 30 according to this embodiment, respectively. As shown in fig. 5 and 6, in addition to the configuration of the first embodiment, the cushioning materials 34a to 34d are provided with slits 34y cut in a direction perpendicular to the slits 34 x. That is, each of the four cushioning materials 34 is provided with

slits

34x and 34 y.

Further, the upper cushioning material 30 includes a second connecting member 36 in addition to the configuration of the first embodiment. The second connecting member 36 is formed of a packaging material, such as corrugated cardboard, including plastic corrugated cardboard. Incidentally, the packing member 50 according to this embodiment differs from that of the first embodiment only in the configuration of the upper cushioning material 30, specifically in that the slit 34y is formed and the second connecting member 36 is provided. The second connecting member 36 is provided with a third curved portion 36a curved downward at one end thereof and a fourth curved portion 36b curved downward at the other end thereof. The third curved portion 36a and the fourth curved portion 36b are opposed to each other by the sheet feeding device 100.

The third curved portion 36a is engaged in a slit 34y (third engaging portion) formed in

cushioning materials

34a and 34b (fourth cushioning material), which

cushioning materials

34a and 34b are attached to adjacent (two) corner portions of the upper surface 100a of the sheet feeding device 100. The fourth curved portion 36b is engaged in a slit 34y (fourth engaging portion) formed in

cushioning materials

34c and 34d (fifth cushioning material), which

cushioning materials

34c and 34d are attached to adjacent (two) corner portions of the upper surface 100a of the sheet feeding device 100. Thus, the four cushioning materials 34 are connected to each other by the connecting member 35. Further, by adjusting the bent portion of the second connecting member 36, the interval between the

cushioning materials

34a and 34b and the

cushioning materials

34c and 34d can be defined. Incidentally, the connecting member 35 and the second connecting member 36 are provided in an overlapping manner.

That is, the second connecting member 36 includes a third curved portion 36a that is bent so as to be engaged in the slits 34y formed in the

cushioning materials

34a and 34b, and includes a fourth curved portion 36b that is bent so as to be engaged in the slits 34y formed in the

cushioning materials

34c and 34 d. Further, the third curved portion 36a and the fourth curved portion 36b are opposed to each other by the sheet feeding device 100 in a curved state. Further, the

cushioning materials

34c and 34d are attached to corner portions different from the corner portions to which the

cushioning materials

34a and 34b are attached.

Here, an elastic force similar to the elastic force acting on the connecting member 35 described in the first embodiment acts on the second connecting member 36. That is, the elastic force of the second connecting member 36 serves as a force for pressing the cushioning material 34 against the inner surface of the side panel 42a of the packing case 42, and by this force, the cushioning material 34 is pressed into contact with the inner surface of the side panel 42a of the packing case 42 with a stronger force.

Therefore, by providing the second connecting member 36 in addition to the connecting member 35, the frictional force between the cushioning material 34 and the packing box 42 is further enhanced. Therefore, the force for holding the cushioning material 34 by the packing case 42 is strengthened, so that the upper cushioning material 30 is easily detached together with the packing case 42 during the unpacking of the packing member 50.

Incidentally, in the first and second embodiments, as the product to be packaged of the packaging member 50, although the sheet feeding apparatus 100 is described as an example, the present invention is not limited thereto. That is, when the product to be packaged is a member including an upper surface having a substantially rectangular shape and having a shape in which the bottom area is larger than the upper surface area, effects similar to the above-described effects are obtained even when other articles are used as the product to be packaged.

Further, in the above-described embodiment, the configuration including four cushioning materials 34(34a to 34d) is adopted, wherein such a configuration may also be adopted: a single cushioning material is attached to both corner portions of the upper surface 100a of the sheet feeding device. In this case, by providing two cushioning materials, four corner portions of the upper surface 100a of the sheet feeding apparatus 100 can be covered with two cushioning materials. Even in such a configuration including two cushioning materials, effects similar to those described above can be achieved by connecting the two cushioning materials with the connecting member 35 as described above.

According to the present invention, not only in the packing member, the tubular member and the cushioning material can be unpacked at the same time, but also the packing member can be easily reused.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A packing member for packing a sheet feeding device for feeding a sheet, wherein the sheet feeding device includes an upper surface having a substantially rectangular shape and a bottom portion having an area larger than an area of the upper surface, the packing member comprising:

a packaging bag made of polyethylene or polypropylene and configured to package the sheet feeding device;

a first cushioning material that includes a first engaging portion and is attached to a corner portion of an upper surface of the sheet feeding device in a state in which the sheet feeding device is packed in the package bag;

a second cushioning material that includes a second engaging portion and is attached to a corner portion of an upper surface of the sheet feeding device in a state in which the sheet feeding device is packed in the package bag, wherein the corner portion to which the second cushioning material is attached is adjacent to the corner portion to which the first cushioning material is attached;

a connecting member that connects the first cushioning material and the second cushioning material and includes a first curved portion that is curved so as to engage with the first engaging portion and a second curved portion that is curved so as to engage with the second engaging portion and is opposed to the first curved portion by the sheet feeding device in a curved state; and

a third cushioning material mounted to a bottom of the sheet feeding device in a state in which the sheet feeding device is packed in the packing bag; and

a tubular member that accommodates the sheet feeding device in a state in which the first cushioning material, the second cushioning material, and the third cushioning material are attached to the sheet feeding device,

wherein the first cushioning material and the second cushioning material are in contact with the inner surface of the tubular member by the elastic force of the connecting member and the tension of the packing bag generated as the first cushioning material, the second cushioning material, and the third cushioning material are mounted.

2. A packing member according to claim 1, wherein said first cushioning material and said second cushioning material are provided with slits in which said first curved portion and said second curved portion are engaged, respectively.

3. The packing member according to claim 1, wherein a contact distance of the first cushioning material with an inner surface of the tubular member is longer than contact distances of the first cushioning material, the packing bag, and the sheet feeding device, and a contact distance of the second cushioning material with an inner surface of the tubular member is longer than contact distances of the second cushioning material, the packing bag, and the sheet feeding device, with respect to a direction in which the tubular member is detached from the sheet feeding device in a state in which the sheet feeding device is packed in the packing bag.

4. A packing member according to claim 1, wherein in a state before the sheet feeding device is accommodated in the tubular member, a space between a contact surface where the first cushioning material and the inner surface of the tubular member are in contact and a contact surface where the second cushioning material and the inner surface of the tubular member are in contact is wider than a space between a contact surface where the sheet feeding device and the first cushioning material are in contact and a contact surface where the sheet feeding device and the second cushioning material are in contact.

5. The package member of claim 1, further comprising:

a fourth cushioning material that is attached to a corner portion of an upper surface of the sheet feeding device in a state in which the sheet feeding device is packed in the packing bag and includes a third engaging portion that engages with the first curved portion, the fourth cushioning material being attached to a corner portion different from corner portions to which the first cushioning material and the second cushioning material are attached, and

a fifth cushioning material that is attached to a corner portion of an upper surface of the sheet feeding device in a state in which the sheet feeding device is packed in the packing bag and includes a fourth engaging portion that engages with the second curved portion, the fifth cushioning material being attached to a corner portion different from corner portions to which the first cushioning material, the second cushioning material, and the fourth cushioning material are attached.

6. The package member of claim 5, further comprising:

a second connecting member that connects the first cushioning material, the second cushioning material, the fourth cushioning material, and the fifth cushioning material and includes a third curved portion that is curved so as to be engaged with the first cushioning material and the fourth cushioning material and a fourth curved portion that is curved so as to be engaged with the second cushioning material and the fifth cushioning material and is opposed to the third curved portion by the sheet feeding device in a curved state,

wherein the fourth cushioning material and the fifth cushioning material are pressed into contact with the inner surface of the tubular member by the elastic force of the second connecting member and the tension of the packing bag.