Housing structure and electronic device

Abstract

To provide a housing structure and an electronic apparatus that certainly prevent opening of an opening and closing door during burning in order to achieve safety of a door opening and closing part with a simple and inexpensive configuration.SOLUTION: In an image forming system, a housing structure comprises: an apparatus body; an opening and closing body 9 that is openably and closably supported on the apparatus body and can be displaced to an open position and a closed position; an engaging member 13 that is displaceably supported on a rotation shaft 12 provided on the opening and closing body 9 and holds the opening and closing body 9 at the closed position with respect to the apparatus body; and a member 16 to be engaged that is provided on the apparatus body 2 and with which the engaging member 13 can engage when the opening and closing body 9 occupies the closed position. The engaging member 13 has a slide member 14 and a non-flammable member 15 provided in parallel in an axial direction of the rotation shaft 12, and when the opening and closing body 9 occupies the closed position, at least the non-flammable member 15 is engaged with the member 16 to be engaged to hold the opening and closing body 9 at the closed position.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a housing structure and an electronic device. [Background technology]

[0002] Technical issues facing the machinery manufacturing industry, including image forming devices, include the incorporation of new technologies, as well as improvements to energy conservation, cost reduction, weight reduction, and space saving by reviewing conventional technologies. To address these technical issues, for example, in order to reduce costs and weight, the thickness of metal casings and exterior parts is reduced, holes are provided in places that do not affect strength, plastic parts are used instead of metal parts, and parts are arranged in a way that does not create excess space inside the machine. Even with this configuration, if a fire breaks out inside the aircraft, there is a risk that the fire will spread to low flame retardant components located near the ignition point, and if a fire breaks out outside the aircraft, there is a risk that the fire will spread to the aircraft.

[0003] It is known that metal parts are fire-resistant materials because they do not burn, and that plastic parts have a grade of flame retardancy. However, parts with low flame retardancy are more likely to burn and can become fuel if a fire spreads to those parts. Meanwhile, a technology is known in which a synthetic resin, metal, ceramic, or a combination of these is used as the material for the locking claw that constitutes the locking mechanism that fixes the opening and closing door provided on the main body of the image forming apparatus (see, for example, "Patent Document 1"). Still another technology is known, which is a technology for smoothly operating the hook when engaging with the hook member in a locking device in which a hook advances onto a fixed hook member and engages with the hook member while rotating (see, for example, "Patent Document 2"). Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, when the material of the locking claw is a single synthetic resin, if there is no part with high flame retardancy that satisfies the sliding properties and a part with low flame retardancy is used to satisfy the sliding properties, if a fire breaks out inside the aircraft, the locking claw will burn and the opening door will open, and there is a risk that the fire will spread to the outside of the aircraft through the open opening door. In addition, when the locking claw is made of a single metal, it has good strength and durability, but generates abnormal noises when it comes into contact with the engagement part or when it slides. In addition, if the part has corners, the part is cut during sliding, and the resulting cutting chips may cause malfunctions in electronic devices.

[0005] Furthermore, when the locking claw is made of a single ceramic material, although it has excellent heat resistance and abrasion resistance, it is vulnerable to mechanical shock and is expensive. Furthermore, when the locking claw is made of a combination of synthetic resin and metal, the outer periphery of the metal locking claw is covered with synthetic resin or the surface is coated with synthetic resin, but this increases the number of parts with complex shapes and requires difficult processing, resulting in increased costs. Furthermore, when the locking claw is made of a combination of synthetic resin and ceramic, the outer periphery of the ceramic locking claw is covered with synthetic resin or the surface is coated with synthetic resin, but this increases the number of parts with complex shapes and requires difficult machining processes, resulting in increased costs.

[0006] The technology described in Patent Document 2 is a mechanism that locks by hooking a synthetic resin casing onto a hook, but there is a problem in that if a synthetic resin part burns and a force acts on the opening door in the opening direction, the locked state cannot be maintained. SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to solve the above-mentioned problems and to realize safety of the door opening and closing portion with a simple and inexpensive structure, thereby reliably preventing the opening and closing door from opening during combustion. [Means for solving the problem]

[0007] The invention described in claim 1 comprises a device main body, an opening / closing body supported on the device main body so as to be freely opened and closed and displaceable between an open position and a closed position, an engaging member supported on a rotating shaft provided on the opening / closing body so as to be freely displaceable and holds the opening / closing body at the closed position relative to the device main body, and an engaged member provided on the device main body and engageable with the engaging member when the opening / closing body occupies the closed position, the engaging member having a sliding member and a noncombustible member arranged in parallel in the axial direction of the rotating shaft, ,before The non-combustible materials and the sliding member The opening / closing body is held in the closed position by engaging with the engaged member. Effect of the Invention

[0008] According to the present invention, the safety of the door opening and closing portion can be achieved with a simple and inexpensive structure, and the opening and closing door can be reliably prevented from opening during combustion. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram illustrating an image forming system according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram illustrating an opening / closing door and a grip part according to the first embodiment of the present invention. [Diagram 3] 2 is a schematic view of the opening and closing door according to the first embodiment of the present invention, as viewed in the direction indicated by the arrow A in FIG. [Figure 4] FIG. 2 is a schematic view illustrating an engagement member used in the first embodiment of the present invention. [Diagram 5] 3 is a schematic diagram illustrating an engagement state between an engaging member and an engaged member used in the first embodiment of the present invention. FIG. [Figure 6] 1A to 1C are schematic diagrams illustrating the operation of the opening and closing door and engaging member used in the first embodiment of the present invention, and respectively show (a) a state in which the engaging member and the engaged member are engaged with each other, (b) a state in which the engaging member is disengaged from the engaged member, (c) a state in which the operator has released the grip of the gripping portion, and (d) a state in which the opening and closing door is in the middle of being displaced to the closed position. [Figure 7] 4 is a schematic view showing a state in which a sliding member of the engagement member used in the first embodiment of the present invention is eliminated. FIG. [Figure 8] 13A and 13B are schematic diagrams illustrating an engaging member in a separated state and an engaging member in a pressed state, respectively, used in a second embodiment of the present invention. [Figure 9] 13 is a schematic diagram illustrating a rotation shaft and an engagement member used in a third embodiment of the present invention. FIG. [Figure 10] 13 is a schematic diagram illustrating a rotation shaft and an engagement member used in a fourth embodiment of the present invention. FIG. [Figure 11] 11A and 11B are schematic diagrams of an opening and closing door showing modified examples applicable to each embodiment of the present invention. [Figure 12] FIG. 11 is a schematic perspective view illustrating a conventional opening and closing door, a grip portion, a rotating shaft, an engaging member, and an engaged member. [Figure 13] FIG. 11 is a schematic perspective view showing a conventional engaging member. [Figure 14] 11 is a schematic diagram illustrating an engagement state between an engaging member and an engaged member according to a related art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Prior to describing the present invention, the housing structure of a conventional image forming apparatus will be described. In consideration of the occurrence of a sheet transport jam in the sheet transport section, the apparatus body of a conventional image forming apparatus is provided with an opening / closing door 51 that is opened and closed when removing a jammed sheet in the sheet transport section, as shown in Fig. 12. When a sheet jam occurs, the opening / closing door 51 in a closed state can be opened to access the sheet stuck in the sheet transport section. During normal use, the opening / closing door 51 is in a closed position closed to the apparatus body.

[0011] The door 51 is provided with a gripping portion 52 that is gripped by an operator when opening or closing the door, and a rotating shaft 53 that is provided on the back side of the door 51 and supported by the door 51 so as to be freely rotatable, and engaging members 54 are fixed near both ends of the rotating shaft 53. The gripping portion 52 and the rotating shaft 53 are driven in an interlocking manner, and when the gripping portion 52 is displaced by being gripped by the operator, the rotating shaft 53 rotates. On the device main body side corresponding to each engaging member 54, an engaged member 55 is provided, which is implanted in the device main body, and each engaging member 54 has an engaging portion 54a that can engage with the corresponding engaged member 55, as shown in FIG.

[0012] 14, the engaging members 54 are engaged with the engaged members 55, so that the door 51 is fixed in a closed state relative to the device body. By gripping and displacing the gripping portion 52 from this state, the engaging members 54 and the engaged members 55 are released from their engaged state, and the door 51 is opened by its own weight and enters an open state. Both the engaging member 54 and the engaged member 55 are required to have the strength and durability to withstand the weight of the opening and closing door 51, and to be able to smoothly open and close the opening and closing door 51. For example, if the engaging member 54 is made of synthetic resin and the engaged member 55 is made of metal, it is easy to process them into a shape that can withstand the weight of the opening and closing door 51, and the durability is sufficient to keep the opening and closing door 51 in a closed state, and the opening and closing door 51 can be opened and closed smoothly.

[0013] However, synthetic resin materials are polymer compounds whose main raw material is crude oil, and are easily combustible materials. Therefore, if there is an ignition source or a component with low flame retardancy near a component made of synthetic resin material, there is a risk that the fire will spread to the synthetic resin component that forms the engaging member 54 if a fire breaks out inside the aircraft. Even if the fire does not spread, there is a possibility that the synthetic resin component will melt due to radiant heat from the burning material. In other words, if a synthetic resin component is used as the engaging member 54, there is a risk that the engaging member 54 will burn or deform when a fire breaks out inside the aircraft, and the opening and closing door 51 will no longer be able to be held in a closed state. If the opening and closing door 51 is not held in a closed state, there is a risk that the engaging member 54 will burn and the opening and closing door 51 will open if a fire breaks out inside the aircraft, and the combustion will spread outside the aircraft through the open opening and closing door 51.

[0014] The configuration of the present invention that solves the above-mentioned problems will be described below. Fig. 1 shows an image forming system according to a first embodiment of the present invention. In the figure, the image forming system 1 has a copying machine 100, which is an image forming device as an electronic device having an integrated circuit, a first post-processing device 200, a second post-processing device 300, etc. The copying machine 100 has an apparatus main body 2, and a well-known automatic document feeder 3 having a document reading function is provided on the upper part of the apparatus main body 2. A first post-processing device 200 is connected to the downstream side of the copying device 100 in the sheet transport direction, and has a function of inserting sheets as post-processing and transports sheets sent from the copying device 100 further downstream. A second post-processing device 300 is connected to the downstream side of the first post-processing device 200 in the sheet transport direction, and is connected to the first post-processing device 200 and performs various processes such as folding, punching, and stapling on sheets as post-processing.

[0015] The copying machine 100 has two paper feed trays 4 for storing a plurality of sheets at the bottom inside the machine body 2. The sheet fed from the paper feed tray 4 is fed along a sheet transport path 5 and reaches an image forming unit 6 arranged above the paper feed tray 4. The image forming unit 6 has a photoconductor drum 7 as an image carrier, and a toner image corresponding to an image read by the automatic document feeder 3 is transferred from the photoconductor drum 7 onto the fed sheet. The image formed on the sheet is fixed by a fixing device (not shown) provided inside the machine body 2, and then the sheet is discharged via the first post-processing device 200 and the second post-processing device 300 to a discharge tray 303 provided in the second post-processing device 300.

[0016] Inside the apparatus body 2, a plurality of roller pairs 8 constituting the sheet transport path 5 are arranged. Inside the apparatus body 201 of the first post-processing device 200, a plurality of roller pairs 202 that transport sheets similarly to the roller pairs 8 are arranged, and inside the apparatus body 301 of the second post-processing device 300, a plurality of roller pairs 302 similar to the roller pairs 8 are arranged. In consideration of the occurrence of a sheet jam in the sheet transport path 5, the apparatus body 2 is provided with an opening / closing door 9 as an opening / closing body supported so as to be freely opened and closed by the apparatus body 2, which is configured to open the sheet transport path 5 when the jam is cleared. The opening / closing door 9 is displaced between a closed position shown by a two-dot chain line in Fig. 1 and an open position shown by a solid line by opening and closing the door 9 by the operator of the copying apparatus 100. In addition, a portion of the apparatus body 2 corresponding to the image forming unit 6 is also provided with an opening / closing door 10 as an opening / closing body supported so as to be freely opened and closed by the apparatus body 2, for clearing a sheet jam in the image forming unit 6.

[0017] The device body 201 is provided with doors 203 and 204 as opening / closing bodies supported by the device body 201 so as to be openable and closable, for handling a sheet that has jammed at each roller pair 202. Similarly, the device body 301 is provided with doors 304 as opening / closing bodies supported by the device body 301 so as to be openable and closable, for handling a sheet that has jammed at each roller pair 302. Each of the doors 203, 204, and 304 has the same structure as the door 9 described below.

[0018] Fig. 2 is a schematic diagram of the door 9 in the closed position in Fig. 1, as viewed from the right side of Fig. 1. As shown in Fig. 2, a grip 11 is provided on the front side of the door 9, which is gripped by an operator when opening the door 9. Fig. 3 is a schematic diagram of the door 9, as viewed from the direction indicated by arrow A in Fig. 1. As shown in Fig. 2, a rotating shaft 12 is provided on the rear side of the door 9, which is rotatably supported on the door 9 by a bearing member (not shown). The grip 11 and the rotating shaft 12 are connected by an interlocking mechanism (not shown), and when the grip 11 is displaced in a direction to be pulled upward by the operator in Fig. 2, the rotating shaft 12 rotates counterclockwise in response to the grip 11 when viewed from the left side of Fig. 3.

[0019] An engaging member 13 is fixed to the end of the rotating shaft 12. As shown in Figures 3 and 4, the engaging member 13 is composed of a sliding member 14 and a noncombustible member 15 on which engaging portions 14a, 15a are formed, similarly to the engaging member 54. The sliding member 14 and the noncombustible member 15 are arranged side by side in the axial direction of the rotating shaft 12. The portion of the rotating shaft 12 to which the engaging member 13 is fixed is formed into a D-shape to prevent the sliding member 14 and the noncombustible member 15 from rotating freely. The sliding member 14 is made of a flammable resin material such as synthetic resin, and has the property of burning or melting when heated, and also has the property of wearing away without producing abnormal noise or cutting chips when it comes into contact with and slides against a hard material such as metal. The non-flammable member 15 is made of a non-flammable material such as metal, ceramic, or thermosetting resin, and has the property of hardly being altered when heated. In this embodiment, the engaging member 13 has a sliding member 14 and a non-combustible member 15 arranged side by side in the axial direction of the rotating shaft 12, so there is no need for processing such as coating the sliding member on the non-combustible member as in the conventional technology.

[0020] The sliding member 14 is provided with a contact portion 14b that comes into contact with an engaged member 16, which will be described later. The noncombustible member 15 is formed such that a portion corresponding to the contact portion 14b is located inward from the sliding member 14 by a thickness B, and is formed such that when the sliding member 14 comes into contact with the engaged member 16, the noncombustible member 15 is separated from the engaged member 16 and comes out of contact with the engaged member 16. This thickness B is set to be equal to or greater than the thickness at which contact portion 14b wears away during the life of the product. Therefore, even if contact portion 14b wears away due to contact with engaged member 16, the surface of noncombustible member 15 is not exposed on the surface side of contact portion 14b.

[0021] As shown in Fig. 3, an engaged member 16 is provided on the side of the device body 2 corresponding to the engaging member 13. When the opening and closing door 9 is displaced from the open position to the closed position, the engaged member 16 is accommodated in each of the engaging portions 14a, 15a as shown in Fig. 5, and the opening and closing door 9 is held in the closed position. When the operator displaces the grip portion 11 upward from the state in which the door 9 is in the closed position, the rotating shaft 12 connected by an interlocking mechanism (not shown) rotates counterclockwise in Fig. 5, and the engaging member 13 fixed to the rotating shaft 12 rotates upward. This rotation releases the engagement between the engaging portions 14a, 15a and the engaged member 16, and the door 9 displaces from the closed position to the open position due to its own weight.

[0022] A torsion coil spring 17 is attached to the rotating shaft 12 to apply a rotational biasing force in a clockwise direction to the rotating shaft 12 as shown in Fig. 3. When the operator releases the grip of the grip part 11, the rotating shaft 12 and the engagement member 13 fixed thereto are returned to their initial states by the biasing force of the torsion coil spring 17. 5, when the opening / closing door 9 is in the closed position, the engaging member 13 is configured so that both the sliding member 14 and the noncombustible member 15 engage the engaging portions 14a, 15a with the engaged member 16. In other words, even if the engaged state of either the sliding member 14 or the noncombustible member 15 is released, the engaged state of the other is maintained. The engaged member 16 is formed so that its overall length is longer than the axial length of the engaging portions 14a, 15a of the engaging member 13, so that when the engaging member 13 is engaged, it has an excess C shown in Figure 3 in the axial direction of the pivot shaft 12.

[0023] Next, a series of operations of the opening and closing door 9 and the engaging member 13 will be described. 6(a) shows a state in which the opening / closing door 9 is in the closed position and the engaging member 13 is engaged with the engaged member 16. In this state, the engaging member 13 engages the engaging portions 14a, 15a of the sliding member 14 and the noncombustible member 15 with the engaged member 16. In other words, the engaging member 13 engages at least the engaging portion 15a of the noncombustible member 15 with the engaged member 16. Fig. 6(b) shows a state in which grip portion 11 is gripped by an operator and the engagement state of engaging member 13 with engaged member 16 is being released. When grip portion 11 is displaced upward by the operator's grip, rotating shaft 12 rotates counterclockwise in Fig. 6(b), which causes engaging member 13 to rotate counterclockwise and disengage engaged member 16 from engaging portions 14a, 15a, thereby releasing the engagement state between engaging member 13 and engaged member 16.

[0024] Fig. 6(c) shows a state in which the operator releases the grip of the grip portion 11. When the grip of the grip portion 11 is released, the urging force of the torsion coil spring 17 shown in Fig. 3 causes the grip portion 11 to move downward, and the rotating shaft 12 and the engaging member 13 to move clockwise and return to their initial states, and the opening and closing door 9 opens downward by its own weight and stops at a regulated position, occupying the open position. FIG. 6(d) shows a state in which the door 9 is in the middle of being displaced from the open position to the closed position, and the engaging member 13 abutting against the engaged member 16 is displaced counterclockwise due to the displacement of the door 9, and the engaged member 16 is engaged with the engaging portions 14a and 15a. When the door 9 is displaced from the open position to the closed position by an operator, the contact portion 14b comes into contact with the engaged member 16 in the middle. When the door 9 is further displaced from this state toward the closed position, the engaging member 13, which has brought the contact portion 14b into contact with the engaged member 16, is gradually rotated counterclockwise. When the contact portion 14b completely overcomes the engaged member 16, the rotating shaft 12 and the engaging member 13 are rotated clockwise by the biasing force of the torsion coil spring 17, and the engaged member 16 is engaged with the engaging portions 14a and 15a, resulting in the state shown in FIG. 6(a).

[0025] According to the above-mentioned configuration, the engaging member 13 has the sliding member 14 and the noncombustible member 15 arranged in parallel in the axial direction of the rotating shaft 12, and when the opening / closing door 9 is in the closed position, the engaging member 13 engages the sliding member 14 and the noncombustible member 15 with the engaged member 16, and holds the opening / closing door 9 in the closed position as shown in Fig. 5. In this state, if a fire breaks out from inside the device main body 2 in this state, even if the sliding member 14, which is weak against heat, disappears or deforms and loses its holding force on the engaged member 16, the noncombustible member 15 is engaged with the engaged member 16 by the holding portion 15a as shown in Fig. 7, so that the opening / closing door 9 is securely held in the closed position. This makes it possible to reliably prevent the opening and closing door 9 from opening during combustion, thereby realizing safety of the door opening and closing portion with a simple and inexpensive configuration without covering or coating the sliding member 14 on the noncombustible member 15.

[0026] According to the above-mentioned configuration, when the opening / closing door 9 is displaced from the open position to the closed position, the engaging member 13 comes into contact with the engaged member 16, and displaces from a non-engaged position where it does not engage with the engaged member 16 to an engaged position where it engages with the engaged member 16. Therefore, it is possible to provide the engaging member 13 that can be displaced in conjunction with the displacement operation of the opening / closing door 9 with a simple configuration. In addition, since the contact portion 14b that comes into contact with the engaged member 16 is provided only on the sliding member 14, no abnormal noise or cutting chips are generated from the engaging member 13 when it comes into contact with and slides against the engaged member 16 made of a high-hardness material such as metal. This improves the ease of use of the copying machine 100 and reduces the occurrence of breakdowns.

[0027] Fig. 8 shows an engaging member 18 according to a second embodiment of the present invention. In Fig. 8(a), engaging member 18 has sliding member 14 and non-combustible member 19 arranged side by side in the axial direction of rotating shaft 12. Non-combustible member 19 is made of a non-combustible material such as metal or thermosetting resin and has the property of being hardly altered when heated, and has a plurality of protrusions (burrs) 19a generated during manufacturing on one side surface thereof which is in pressure contact with one side surface of sliding member 14. As shown in FIG. 8(b), the sliding member 14 is set to have a hardness that allows each protrusion 19a to easily bite into one side surface of the noncombustible member 19 when the sliding member 14 is pressed against the one side surface of the noncombustible member 19.

[0028] According to this configuration, multiple protrusions 19a generated on noncombustible member 19 during manufacturing can be accommodated inside sliding member 14 simply by pressing it against sliding member 14. This makes it possible to omit the post-processing process of protrusions 19a, which normally requires post-processing such as scraping, crushing, and painting, and to hide protrusions 19a in a location that cannot be touched by human hands, thereby reducing the number of processes, reducing costs, and improving safety. Furthermore, if a rotating shaft in which the portion supporting the engaging member is not D-shaped is used instead of the rotating shaft 12, the sliding member and the noncombustible member may rotate relative to each other, causing misalignment. However, by using the sliding member 14 and the noncombustible member 19, the sliding member 14 and the noncombustible member 19 can be integrated because each protrusion 19a bites into the sliding member 14, and it is possible to prevent the sliding member 14 and the noncombustible member 19 from rotating relative to each other and causing misalignment.

[0029] 9 shows a rotating shaft 20 and an engaging member 21 according to a third embodiment of the present invention. In the figure, the rotating shaft 20 has a step portion 20a, and one end face of the engaging member 21 abuts against this step portion 20a to position the engaging member 21 in the axial direction. A portion of the rotating shaft 20 to the left of the step portion 20a in FIG. 9 is formed into a D-shape, similar to the rotating shaft 12. The engaging member 21 has a sliding member 22 made of the same material as the sliding member 14 and a noncombustible member 23 made of the same material as the noncombustible member 15, and both are arranged side by side in the axial direction of the rotating shaft 20, with the noncombustible member 23 positioned outside the sliding member 22. A flange portion 23a is integrally formed on the other end face of the noncombustible member 23 opposite to the one end face that contacts the sliding member 22, and a set screw 24 that is pressed or screwed into the rotating shaft 20 to restrict the axial movement of the engaging member 21 is screwed into the flange portion 23a. According to this configuration, the engaging member 21 is positioned in the axial direction by the step portion 20a, and this position can be maintained by the set screw 24, so that the positioning accuracy of the engaging member 21 can be improved with a simple configuration.

[0030] 10 shows a rotating shaft 25 and an engaging member 26 according to a fourth embodiment of the present invention. In the figure, the rotating shaft 25 has a step portion 25a, and one end face of the engaging member 26 abuts against this step portion 25a to position the engaging member 26 in the axial direction. A portion of the rotating shaft 25 to the left of the step portion 25a in FIG. 10 is formed into a D-shape similar to the rotating shaft 12. The engaging member 26 has a sliding member 27 made of the same material as the sliding member 14 and a noncombustible member 28 made of the same material as the noncombustible member 15, and both are arranged side by side in the axial direction of the rotating shaft 25, with the sliding member 27 positioned outside the noncombustible member 28. A snap fit 27a is integrally formed on the other end face of the sliding member 27 opposite to the one end face that comes into contact with the noncombustible member 28, and the snap fit 27a engages with a recess 25b formed in the rotating shaft 25 to restrict the movement of the engaging member 26 in the axial direction. According to this configuration, the engaging member 26 is positioned in the axial direction by the step portion 25a, and this position can be maintained by the snap fit 27a, so that the positioning accuracy of the engaging member 26 can be improved with a simple configuration.

[0031] In the second, third and fourth embodiments described above, when each of the engaging members 18, 21 and 26 occupies an engaging position in which they engage with the engaged member 16, the sliding member 14 and the non-combustible member 19, the sliding member 22 and the non-combustible member 23, and the sliding member 27 and the non-combustible member 28 are configured to engage with the engaged member 16, respectively. Therefore, as in the first embodiment, even if a fire breaks out, for example, from inside the device body 2 and the heat-sensitive sliding members 14, 22, 27 are lost or deformed and lose their holding force on the engaged member 16, the non-combustible members 19, 23, 28 are engaged with the engaged member 16, so that the opening and closing door 9 is securely held in the closed position. This makes it possible to reliably prevent the opening and closing door 9 from opening during combustion, thereby realizing safety of the door opening and closing portion with a simple and inexpensive configuration without covering or coating the sliding members 14, 22, 27 on the noncombustible members 19, 23, 28.

[0032] In the above-mentioned first to fourth embodiments, the engaging members 13, 18, 21, 26 are provided on one end of the rotating shafts 12, 20, 25. For example, in the first embodiment, when the opening and closing door 9 is large or heavy, it may be difficult in terms of strength to hold the opening and closing door 9 in the closed position with only one engaging member 13. In such a case, as shown in FIG. 11, the engaging members 13 may be provided on both ends of the rotating shaft 12, and the opening and closing door 9 may be supported by the two engaging members 13. In this configuration, each engaging member 13 is fixed to the rotating shaft 12 as in the first embodiment, and each engaging member 13 does not hinder the rotation of the rotating shaft 12. According to this configuration, even if the door 9 is large or heavy, the door 9 can be securely held in the closed position. Although this modification shows a configuration using two engaging members 13, three or more engaging members may be used. This modification can also be applied to the other engaging members 18, 21, 26.

[0033] In the above-mentioned first to fourth embodiments and modified examples, the grip portion 11 and the rotating shafts 12, 20, 25 are connected by an interlocking mechanism (not shown), and when the grip portion 11 is displaced from bottom to top in Fig. 2, the rotating shaft 12 rotates counterclockwise in Fig. 4. Instead of this configuration, for example, by changing the configuration to one in which the support shaft 11a of the grip portion 11 shown in Fig. 3 is disposed below the grip portion 11 and the grip portion 11 is displaced from top to bottom, and the support shaft 11a is formed long across the width direction of the opening and closing door 9, the engaging member 13 can be provided directly on the support shaft 11a. This configuration can be simplified compared to the configurations of the rotation shafts 12, 20, 25 and the engagement members 13, 18, 21, 26 in the above-described embodiments, and costs can be reduced by reducing the number of components. In each of the above-described embodiments and modified examples, an example has been shown in which the door 9 is used as the opening / closing body, but as the opening / closing body, in addition to the door 9, the door 10 provided on the apparatus body 2 of the copying apparatus 100 shown in Fig. 1, the doors 203 and 204 provided on the apparatus body 201 of the first post-processing apparatus 200, and the door 304 provided on the apparatus body 301 of the second post-processing apparatus 300 may also be used. In addition, the present invention may be applied to the doors of electronic devices that generate heat, such as personal computers and servers, and furthermore, home appliances and mobile vehicles.

[0034] Although a preferred embodiment of the present invention has been described above, the present invention is not limited to such a specific embodiment, and various modifications and variations are possible within the scope of the spirit of the present invention described in the claims, unless otherwise specifically limited in the above description. The effects described in the embodiments of the present invention are merely examples of the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention. [Explanation of symbols]

[0035] 2,201,301 Device body 9, 10, 203, 204, 304 Opening and closing body (opening and closing door) 11 Gripping part 12,20,25 Rotating Axis 13, 18, 21, 26 Engagement members 14, 22, 27 Sliding members 14a,15a Engagement part 14b Contact part 15, 19, 23, 28 Non-combustible materials 16 Engaged member 19a Protrusion 20a, 25a Step [Prior art documents] [Patent documents]

[0036] [Patent Document 1] JP 2005-4161 A [Patent Document 2] Japanese Utility Model Application Publication No. 4-111788

Claims

1. A device body, an opening / closing body that is supported by the device body so as to be freely opened and closed and that is displaceable between an open position and a closed position; an engagement member that is supported on a rotation shaft provided on the opening / closing body so as to be displaceable and that holds the opening / closing body at the closed position relative to the device body; an engaged member that is provided on the device body and that can be engaged with the engaging member when the opening / closing body is in the closed position; The engaging member has a sliding member and a non-combustible member arranged side by side in the axial direction of the pivot shaft, and when the opening / closing body occupies the closed position, both the non-combustible member and the sliding member engage with the engaged member, thereby holding the opening / closing body in the closed position.

2. The housing structure according to claim 1, When the opening / closing body is displaced from the open position to the closed position, the engaging member is displaced from a non-engaged position where it is in contact with the engaged member but does not engage with the engaged member to an engaged position where it engages with the engaged member, A housing structure, wherein the engaging member has a contact portion that contacts the engaged member during the displacement process, and an engaging portion that engages with the engaged member at the engaging position.

3. In the housing structure according to claim 2, A housing structure, wherein the contact portion is provided only on the sliding member.

4. The housing structure according to any one of claims 1 to 3, A housing structure characterized in that the noncombustible member has a protrusion on one side that was generated during manufacturing, and the noncombustible member is arranged with the protrusion pressed against one side of the sliding member.

5. The housing structure according to any one of claims 1 to 4, A housing structure characterized in that the rotating shaft has a stepped portion, and of the engaging members, the sliding member and the non-combustible member, the member located on the inside of the rotating shaft abuts its end face on the stepped portion, and only the member located on the outside of the rotating shaft is fixed to the rotating shaft.

6. The housing structure according to any one of claims 1 to 5, A housing structure comprising a plurality of the engaging members and the engaged members.

7. The housing structure according to any one of claims 1 to 6, A housing structure, characterized in that the opening / closing body has a gripping portion that is gripped when opening and closing, and the engaging member is provided on the gripping portion.

8. The housing structure according to any one of claims 1 to 7, A housing structure characterized in that the sliding member is made of a material that deforms significantly due to heat, and the non-combustible member is made of a material that deforms very little due to heat, and when heat is applied to the device main body with the opening / closing body occupying the closed position and the engaging member engaged with the engaged member, the engaging member maintains the engaged state of the non-combustible member with the engaged member to hold the opening / closing body in the closed position.

9. A device body, an opening / closing body that is supported by the device body so as to be freely opened and closed and that is displaceable between an open position and a closed position; an engagement member that is supported on a rotation shaft provided on the opening / closing body so as to be displaceable and that holds the opening / closing body at the closed position relative to the device body; an engaged member that is provided on the device body and that can be engaged with the engaging member when the opening / closing body is in the closed position; The engaging member has a sliding member and a non-combustible member arranged side by side in the axial direction of the pivot shaft, and when the opening / closing body occupies the closed position, both the non-combustible member and the sliding member engage with the engaged member, thereby holding the opening / closing body in the closed position.

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