Storage cabinets with flap doors and flap door hardware

Abstract

To provide a metal fitting for a flap door capable of being attached / detached without using a tool.SOLUTION: The metal fitting for the flap door used for storing a door body of the flap door in a storage part of a cabinet comprises: a main body part having a sliding part that moves a portion of the door body in a slidable manner; and an insertion shaft integrated with the main body part, which is inserted in one insertion hole pre-formed on an inner wall surface of a side plate forming the storage part. The main body part includes: an engaging recess provided on a tip part of the main body part, which is fixed by engaging with a head part of an engaging pin inserted in another insertion hole pre-formed on the inner wall surface of the side plate; and a protrusion that latches the door body in a freely turnable manner via a hook provided on the door body.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a storage cupboard with a flap door that opens and closes the front opening of a storage section for furniture, and in particular to a storage cupboard with a flap door and fittings for a flap door that are structured so that the door is stored in the internal space of the storage section when open. [Background technology]

[0002] Conventionally, a flap door is composed of a plate-shaped door body that closes the storage section of a cabinet such as furniture, a pair of sliders fixed to both ends of the inside of the door body, and a pair of slide rails fixed in horizontal positions on both side walls of the storage section.

[0003] The sliders and slide rails can all be molded from synthetic resin, making them extremely simple and inexpensive to manufacture. Furthermore, even an average user can easily assemble the door body into a cabinet or other storage unit by simply fastening the slide rails and sliders in place with fixing screws.

[0004] Specifically, the slide rail is positioned horizontally with the rail sliding portion facing upward against the upper portions of both side walls of the cabinet storage section, and is fixed by inserting fixing screws into the fixing holes on both the front and rear sides (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-048544 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the flap door described in Patent Document 1, it is necessary to drill fixing holes in both side walls of the cabinet storage section in order to insert fixing screws into them, and there is also the problem that when the slide rail is removed, the fixing holes remain, which makes the door look unsightly.

[0007] Furthermore, the slide rails must be attached to both side walls of the cabinet storage section with fixing screws, which requires tools, and it is not always easy for an average user to attach the slide rails horizontally.

[0008] The present invention has been made in consideration of the above points, and aims to provide a storage cabinet with flap doors and hardware for flap doors that can be easily installed and removed without the need for tools. [Means for solving the problem]

[0009] In order to solve this problem, the storage cupboard with flap doors of the present invention comprises a cabinet, a plate-shaped door body rotatably attached to a storage section of the cabinet to open and close the storage section, a flap-door fitting for rotatably supporting the door body, and an engagement pin that is inserted into one insertion hole pre-formed in the inner wall surface of a side panel that forms the storage section of the cabinet and engages with the flap-door fitting, and the flap-door fitting has a main body having a sliding part that slidably moves the door body when the door body is stored in the storage section, an insertion shaft that is integral with the main body and is inserted into another insertion hole pre-formed in the inner wall surface of the side panel, an engagement recess that is provided at the tip of the main body and engages with the head of the engagement pin when the main body is rotated relative to the inner wall surface via the insertion shaft, thereby fixing the position of the main body relative to the inner wall surface, and a protrusion that is provided at the tip of the main body and rotatably hooks the door body via a hook provided on the door body.

[0010] In the storage cupboard with flap doors, it is preferable that the engagement recess and the protrusion are integrated and adjacent to each other in the axial direction of the insertion shaft.

[0011] In the storage cupboard with flap doors, it is preferable that the main body has an arm portion that is integrated with the insertion shaft and rotates via the insertion shaft.

[0012] In the storage cupboard with flap doors, it is preferable that the insertion shaft has a cylindrical shape with a through hole, and a metal reinforcing pin is inserted into the through hole.

[0013] In a storage cupboard with a flap door, it is preferable that the door body has a hook on the back surface that engages with the protrusion, and the main body has a stopper pin that comes into contact with the hook when the door body is stored in the storage section.

[0014] Furthermore, in the present invention, there is provided a flap door fitting used to store the door body of a flap door in a storage section of a cabinet, the fitting comprising: a main body having a sliding part that slidably moves a part of the door body; and an insertion shaft that is formed integrally with the main body and is inserted into one insertion hole pre-formed in the inner wall surface of a side plate that forms the storage section, the main body having an engaging recess provided at the tip of the main body that engages and fixes with the head of an engaging pin inserted into another insertion hole pre-formed in the inner wall surface of the side plate; and a protrusion that rotatably hooks the door body via a hook provided on the door body. [Effects of the Invention]

[0015] According to the present invention, it is possible to realize a storage cabinet with flap doors and fittings for flap doors that can be easily attached and removed without the need for tools. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a state in which the flap door is closed in a storage cupboard with a flap door in this embodiment. FIG. [Figure 2] 1 is a perspective view showing a state in which the flap door is rotated in the storage cupboard with flap door in this embodiment. FIG. [Figure 3] 1 is a perspective view showing a state in which the flap doors are stored in a storage cupboard with flap doors in this embodiment. FIG. [Figure 4] FIG. 2 is a perspective view showing the configuration of the flap door in the present embodiment. [Figure 5] FIG. 10 is a perspective view showing the configuration of a hook attached to a flap door in the present embodiment. [Figure 6] FIG. 10 is a perspective view showing the configuration of an engagement pin for fixing the flap door in the present embodiment. [Figure 7] FIG. 10 is a side view showing the state in which the flap door is stored in the present embodiment. [Figure 8] FIG. 2 is a perspective view showing the configuration of the front side of the flap door fitting in the present embodiment. [Figure 9] FIG. 2 is a perspective view showing the configuration of the back side of the flap door fitting in the present embodiment. [Figure 10] FIG. 10 is a perspective view showing an engagement state between an engagement recess and an engagement pin of the flap door fitting in the present embodiment. [Figure 11] 10 is a side view illustrating a state in which the hook is engaged with the protrusion of the flap door fitting when the flap door is closed in this embodiment. FIG. [Figure 12] 10 is a side view illustrating a state in which the hook is hooked onto the protrusion of the flap door fitting when the flap door is rotating in this embodiment. FIG. [Figure 13] FIG. 10 is a perspective view illustrating the installation method in which the flap door fitting according to the present embodiment is engaged with an engaging pin and fixed. DETAILED DESCRIPTION OF THE INVENTION

[0017] (1) Overview of the embodiment First, a typical embodiment of the invention disclosed in this application will be outlined. In the following description, for example, reference numerals in the drawings corresponding to the components of the invention will be given in parentheses.

[0018] [1] A flap-door storage cupboard (1) according to a representative embodiment of the present invention comprises a cabinet (2), a plate-shaped door body (40) rotatably attached to a storage section (20a) of the cabinet (2) to open and close the storage section (20a), flap-door fittings (7f, 7g) that rotatably support the door body (40), and an engagement pin (5) that is inserted into an insertion hole (22f) pre-formed in an inner wall surface (21Ln) of a side plate (21L) that forms the storage section (20a) of the cabinet (2) and engages with the flap-door fitting (7f), and the flap-door fitting (7f) slides the door body (40) when the door body (40) is stored in the storage section (20a). an insertion shaft (77) that is formed integrally with the main body (71) and that is inserted into another insertion hole (22f) that is pre-formed in the inner wall surface (21Ln) of the side plate (21L); an engagement recess (72) that is formed at the tip of the main body (71) and that engages with the head (51b) of the engagement pin (5) in a state in which the main body (71) is rotated relative to the inner wall surface (21Ln) via the insertion shaft (77) to fix the position of the main body (71) relative to the inner wall surface (21Ln); and a protrusion (73) that is formed at the tip of the main body (71) and that rotatably hooks the door main body (40) via a hook (43) that is formed on the door main body (40).

[0019] [2] In the flap-door storage cabinet (1), the engaging recess (72) and the protruding portion (73) are integrated and adjacent to each other in the axial direction of the insertion shaft (77).

[0020] [3] In the storage cabinet (1) with flap doors, the main body (71) is integrated with the insertion shaft (77) and has an arm (75) that rotates via the insertion shaft (77).

[0021] [4] In the flap-door storage cabinet (1), the insertion shaft (77) is cylindrical with a through-hole (77h), and a metal reinforcing pin (79) is inserted into the through-hole (77h).

[0022] [5] In the storage cupboard with flap door (1), the door body (40) has a hook (43) on the back surface (40b) that engages with the protrusion (73), and the main body (71) has a stopper pin (78) that comes into contact with the hook (43) when the door body (40) is stored in the storage section (20a).

[0023] [6] In a representative embodiment of the present invention, a flap door fitting (7f) used to store the door body (40) of a flap door (4) in a storage section (20a) of a cabinet (2) includes a main body (71) having a sliding section (71a) that moves a part of the door body (40) in a slidable state, and a sliding section (71a) that is integral with the main body (71) and is formed in advance on an inner wall surface (21Ln) of a side plate (21L) that forms the storage section (20a). and an insertion shaft (77) that is inserted into the insertion hole (22f), and the main body (71) has an engagement recess (72) that is provided at the tip of the main body (71) and that is engaged with and fixed to a head (51b) of an engagement pin (5) that is inserted into another insertion hole (22f) that is pre-formed on the inner wall surface (21Ln) of the side plate (21L), and a protrusion (73) that rotatably hooks the door main body (40) via a hook (43) that is provided on the door main body (40).

[0024] (2) This embodiment The configuration of a flap-door storage cupboard according to this embodiment will be described in detail below with reference to Figs. 1 to 13. Fig. 1 is a perspective view showing a state in which the flap door is closed in a flap-door storage cupboard according to this embodiment. Fig. 2 is a perspective view showing a state in which the flap door is rotated in a flap-door storage cupboard according to this embodiment. Fig. 3 is a perspective view showing a state in which the flap door is stored in a flap-door storage cupboard according to this embodiment. Fig. 4 is a perspective view showing the configuration of the flap door in this embodiment. Fig. 5 is a perspective view showing the configuration of a hook attached to the flap door in this embodiment. Fig. 6 is a perspective view showing the configuration of an engagement pin for fixing the flap door in this embodiment. Fig. 7 is a side view showing a state in which the flap door in this embodiment is stored. Fig. 8 is a perspective view showing the configuration of the front side of a flap-door hardware in this embodiment. Fig. 9 is a perspective view showing the configuration of the back side of a flap-door hardware in this embodiment. Fig. 10 is a perspective view showing the engagement between the engagement recess of the flap-door hardware and the engagement pin in this embodiment. Fig. 11 is a side view illustrating the state in which the hook and the protrusion of the flap door fitting are engaged when the flap door is closed in this embodiment. Fig. 12 is a side view illustrating the state in which the hook and the protrusion of the flap door fitting are engaged when the flap door is rotating in this embodiment. Fig. 13 is a perspective view illustrating the installation method until the flap door fitting in this embodiment is engaged with the engagement pin and fixed.

[0025] For the sake of convenience, when the flap-door storage cupboard 1 is placed, the direction of arrow a, which is lifted when opening the flap door 4, will be referred to as the upward or upward direction, and the direction of arrow b, which is lowered when closing the flap door 4, will be referred to as the downward or downward direction. Furthermore, the direction of arrow c, when looking at the flap door 4 of the flap-door storage cupboard 1 from the front, will be referred to as the left or leftward direction, and the direction of arrow d, when looking at the flap door 4 from the front, will be referred to as the right or rightward direction. Furthermore, the direction of arrow e, when looking at the flap door 4 of the flap-door storage cupboard 1 from the front, will be referred to as the near or forward direction, and the direction of arrow f, when looking at the flap door 4 from the front, will be referred to as the far or rearward direction. However, the upward and downward directions (hereinafter referred to as the "up-down direction"), the left or right direction (hereinafter referred to as the "left-right direction"), and the front and rear directions (hereinafter referred to as the "front-rear direction") are used for the sake of convenience, and may be defined as different directions depending on the usage of the flap-door storage cupboard 1.

[0026] <Storage cupboard with flap door> 1 to 3, the flap-door storage cabinet 1 in this embodiment is, for example, a so-called color box. The flap-door storage cabinet 1 has a cabinet 2, a shelf 3, a flap door 4, an engagement pin 5 (FIGS. 6 and 13), and flap-door fittings 7 (7f, 7g).

[0027] The cabinet 2 is formed by side plates 21L and 21R facing each other in the left-right direction (the direction of the arrow cd), and a top plate 21U and a bottom plate 21D facing each other in the up-down direction (the direction of the arrow ab).

[0028] The cabinet 2 has a vertically long storage space 20 formed by side plates 21L, 21R, a top plate 21U, and a bottom plate 21D. The cabinet 2 has a plurality of storage sections 20a to 20e in which the storage space 20 is partitioned by a plurality of (in this case, four) shelf boards 3.

[0029] The storage cupboard 1 with flap doors has flap doors 4 attached to each of the storage sections 20a to 20e separated by shelves 3, but for convenience, the flap door 4 is attached only to the top storage section 20a, and the other flap doors 4 are omitted here.

[0030] The inner wall surfaces 21Ln, 21Rn of the two side panels 21L, 21R arranged parallel to each other in the cabinet 2 have multiple dowel holes (also called "mortise holes") 22f, 22g formed in the vertical direction toward the front side (direction of arrow e) and the back side (direction of arrow f) of the storage space 20 as insertion holes for the engagement pin 5 described later.

[0031] Here, when the flap door 4 is viewed from the front, there are multiple dowel holes 22f on the front side of the storage space 20 (in the direction of arrow e), and there are multiple dowel holes 22g on the back side of the storage space 20 (in the direction of arrow f).

[0032] The shelf board 3 is placed on dowels (not shown) inserted into a total of four dowel holes 22f, 22g at the same height on the inner wall surfaces 21Ln, 21Rn of the two opposing side boards 21L, 21R.

[0033] Flap door fittings 7f, 7g are attached to the inner wall surface 21Ln of the side plate 21L through dowel holes 22f, 22g. Flap door fittings 7f, 7g are also attached to the inner wall surface 21Rn of the side plate 21R through dowel holes 22f, 22g.

[0034] That is, flap door fittings 7f are attached to the front side of the inner wall surface 21Ln, and flap door fittings 7g are attached to the back side.Flap door fittings 7g are attached to the front side of the inner wall surface 21Rn, and flap door fittings 7f are attached to the back side.Flap door fittings 7f, 7g have the same basic configuration and shape, and only differ in orientation.

[0035] The storage cupboard 1 with flap doors can be changed between a closed state (Figure 1) in which the flap doors 4 are closed to the storage section 20a, and an open state (Figure 3) in which the flap doors 4 are open to the storage section 20a, and is attached so as to be freely rotatable (Figure 2) via two flap door fittings 7f, 7g fixed to the front side (direction of arrow e) on the upper side of the storage section 20a.

[0036] <Flap door> As described above, the flap door 4 is provided rotatably via the flap door fittings 7f, 7g fixed to the front side (direction of arrow e) of the inner wall surfaces 21Ln, 21Rn of the storage section 20a.

[0037] 1 to 3, the flap door 4 rotates so as to be lifted from below to above via the flap door fittings 7f, 7g, becomes parallel to the top plate 21U and is pushed toward the back (in the direction of arrow f), thereby being stored in the storage section 20a. At this time, the flap door 4 is pushed into the gap between the top plate 21U and the four flap door fittings 7f, 7g, and is placed on top of the four flap door fittings 7f, 7g.

[0038] As shown in FIG. 4, the flap door 4 comprises a door body 40 made of a plate-like material having a rectangular shape when viewed from above, a handle 41 having a generally U-shaped cross section attached by fasteners such as screws (not shown) so as to cover the entire lower end of the door body 40, and two hooks 43 attached by fasteners such as screws 47 to both upper end portions of the door body 40.

[0039] The handle 41 of the flap door 4 has a stand 41a with a generally L-shaped cross section that protrudes forward (in the direction of arrow e) from the front surface 40a of the door body 40. The stand 41a can hold a book or the like leaning against the front surface 40a, and also functions as a handle that can be hooked with a finger to rotate when opening or closing the door body 40.

[0040] The hooks 43 of the flap door 4 are parts that are hooked onto both ends in the left-right direction (arrow cd direction) of the upper side (arrow a direction) of the back surface 40b of the door body 40 when the door body 40 rotates via the flap door fittings 7f, 7g. The hooks 43 attached to both the left and right sides have the same structure.

[0041] 5, the hook 43 has a plate-shaped attachment portion 43a attached to the back surface 40b of the door body 40 of the flap door 4, and a generally L-shaped latch portion 43b protruding from the attachment portion 43a. The attachment portion 43a is attached to the back surface 40b of the door body 40 with screws 47 (FIG. 4) via two upper and lower through holes 43ah.

[0042] The latching portion 43b of the hook 43 is a portion that latches onto a protrusion 73 (FIGS. 8 to 12) of the flap door fittings 7f, 7g, which will be described later. The latching portion 43b has an arm portion 43ba that is perpendicular to the surface of the attached portion 43a and protrudes toward the back (in the direction of arrow f) away from the surface of the attached portion 43a, and a claw portion 43bc that is bent at the tip of the arm portion 43ba and extends upward (in the direction of arrow a) parallel to the surface of the attached portion 43a. In other words, the latching portion 43b of the hook 43 is formed into a substantially L-shape by the arm portion 43ba and the claw portion 43bc.

[0043] <Engagement pin> As shown in FIG. 6, the engagement pin 5 is a pin-shaped member that is attached by being inserted into a plurality of dowel holes 22f, 22g provided in the inner wall surfaces 21Ln, 21Rn of the side plates 21L, 21R.

[0044] The engagement pin 5 is composed of a pin body 51 made of aluminum alloy, stainless steel, or the like, and a movable ring 52 made of resin or the like that is attached so as to be movable in the axial direction while covering the pin body 51. In the engagement pin 5, the pin body 51 and the movable ring 52 are arranged coaxially.

[0045] The pin body 51 of the engagement pin 5 consists of a cylindrical portion 51a having a predetermined outer diameter, a truncated conical head portion 51b formed at one end of the cylindrical portion 51a and having an outer diameter larger than that of the cylindrical portion 51a, and a cylindrical inserted portion 51c formed at the other end of the cylindrical portion 51a and inserted into dowel holes 22f, 22g provided in the inner wall surfaces 21Ln, 21Rn of the side plates 21L, 21R.

[0046] The outer diameter of the head 51b of the engaging pin 5 is larger than the inserted portion 51c and larger than the inner diameter of the dowel holes 22f, 22g. The head 51b has a top surface 51bu and a tapered surface 51bm that is inclined from the top surface 51bu toward the cylindrical portion 51a.

[0047] The outer diameter of the inserted portion 51c of the engagement pin 5 is the same as the inner diameter of the dowel holes 22f, 22g. The inserted portion 51c has an outer peripheral surface 51cg and a tapered surface 51cm that is inclined from the outer peripheral surface 51cg toward the cylindrical portion 51a.

[0048] The movable ring 52 of the engagement pin 5 has a cylindrical portion 52a attached so as to surround the outer peripheral surface of the cylindrical portion 51a of the pin main body 51, and an annular flange portion 52b formed integrally with the cylindrical portion 52a.

[0049] The inner diameter of the cylindrical portion 52a is larger than the outer diameter of the columnar portion 51a of the pin body 51, and the inner diameter of the flange portion 52b is also larger than the outer diameter of the columnar portion 51a of the pin body 51. The inner diameter of the cylindrical portion 52a and the inner diameter of the flange portion 52b are the same. Therefore, the moving ring 52 is formed to be movable in the axial direction (longitudinal direction) between the head portion 51b of the pin body 51 and the inserted portion 51c.

[0050] The movable ring 52 has slits 52s formed in the cylindrical portion 52a and the flange portion 52b along the axial direction. The slits 52s of the movable ring 52 are cuts that penetrate the cylindrical portion 52a and the flange portion 52b from the outer circumferential side to the inner circumferential side. In other words, neither the cylindrical portion 52a nor the flange portion 52b is continuous in the circumferential direction, but are interrupted by the slits 52s.

[0051] In practice, the engagement pin 5 is attached by inserting the inserted portion 51c of the pin body 51 and the cylindrical portion 52a of the moving ring 52 into the dowel holes 22f, 22g provided in the inner wall surfaces 21Ln, 21Rn of the side plates 21L, 21R. At this time, the flange portion 52b of the moving ring 52 is in contact with the inner wall surfaces 21Ln, 21Rn, and only the flange portion 52b of the moving ring 52 and the head portion 51b of the pin body 51 are exposed.

[0052] <Flap door hardware> Next, the configuration of the flap door fittings 7 (7f, 7g) will be described. As shown in Fig. 7, the flap door fitting 7f is attached to the front side (direction of arrow e) of the inner wall surface 21Ln of the side plate 21L, and the flap door fitting 7g is attached to the back side (direction of arrow f) of the inner wall surface 21Ln of the side plate 21L.

[0053] The flap door fittings 7f and 7g have the same basic shape and structure, the only difference being that they are reversed left to right. For this reason, only the flap door fittings 7f will be explained below, and an explanation of the flap door fittings 7g will be omitted.

[0054] As shown in Figures 8 to 10, the flap door fitting 7f has a main body 71 that is generally trapezoidal in side view and is lower on the front side (direction of arrow e) and gets higher towards the back side (direction of arrow f), a protrusion 73 that protrudes from the tip of the main body 71 on the front side (direction of arrow e) in a direction away from the main body 71 on the right side (direction of arrow d), and an arm 75 made of a plate-like member that is generally triangular in side view and is attached to the inner wall surface 21Ln of the side plate 21L.

[0055] A cylindrical insertion shaft 77 that is inserted into a dowel hole 22f provided in the inner wall surface 21Ln of the side plate 21L is formed integrally with the vertex 75t on the upper side (in the direction of arrow a) of the arm 75 of the flap door fitting 7f. The insertion shaft 77 protrudes from the back surface 75b of the arm 75. In other words, the main body 71 has the arm 75 that is integrated with the insertion shaft 77 and rotates via the insertion shaft 77.

[0056] 9, the insertion shaft 77 has a cylindrical shape with a through hole 77h, which communicates with the through hole 75h of the arm portion 75. A metal reinforcing pin 79 (FIG. 8) is press-fitted into the through hole 75h of the arm portion 75 and the through hole 77h of the insertion shaft 77. As a result, the insertion shaft 77 of the arm portion 75 and the reinforcing pin 79 are inserted into the dowel hole 22f of the inner wall surface 21Ln in an integrated state, and the arm portion 75 is attached so as to be in close contact with the inner wall surface 21Ln.

[0057] The main body 71 of the flap door fitting 7f has a flat top surface 71a on the upper side (direction of arrow a). The top surface 71a of the flap door fitting 7f is a sliding surface along which the door main body 40 of the flap door 4 slides when the flap door 4 is being stored in the storage section 20a of the cabinet 2 and when it is being pulled out of the storage section 20a.

[0058] An engagement recess 72 is formed at the tip of the main body 71 on the near side (in the direction of arrow e), adjacent to the protrusion 73 in the axial direction of the insertion shaft 77. The engagement recess 72 is a recessed space that engages with the engagement pin 5 described above. The distance between the engagement recess 72 in the main body 71 of the flap door fitting 7f and the insertion shaft 77 formed in the arm portion 75 is the same as the distance between the multiple dowel holes 22f formed in the inner wall surface 21Ln of the side plate 21L.

[0059] The main body 71 of the flap door fitting 7f has a through hole 71h that penetrates through the centre of its side surface 71s along the axial direction of the insertion shaft 77. However, the through hole 71h is not used in the flap door fitting 7f, and a stopper pin 78 is press-fitted only into the flap door fitting 7g (Fig. 7). When the stopper pin 78 is press-fitted into the through hole 71h of the main body 71 in the flap door fitting 7g (Fig. 7), it protrudes a predetermined length from the side surface 71s.

[0060] The stopper pin 78 protrudes in the opposite direction to the insertion axis 77 of the arm portion 75 along the same direction as the insertion axis 77. Therefore, as shown in Fig. 7, when the door body 40 of the flap door 4 is stored in the storage section 20a, the stopper pin 78 comes into contact with the hook 43 of the flap door fitting 7g, and functions as a stopper that restricts the movement of the door body 40 toward the back (in the direction of arrow f).

[0061] As shown in Figure 9, the engagement recess 72 in the main body 71 of the flap door fitting 7f has a pin body head accommodating space 720 that accommodates the head 51b of the pin body 51 of the engagement pin 5, and a movable ring flange accommodating space 730 that accommodates the flange 52b of the movable ring 52.

[0062] The pin body head accommodating space 720 of the engagement recess 72 is a space surrounded by an inner side surface 720n facing the top surface 51bu of the head 51b of the pin body 51 of the engagement pin 5, and an inner wall portion 722 in contact with the tapered surface 51bm of the head 51b. The pin body head accommodating space 720 of the engagement recess 72 has a substantially triangular prism-like spatial shape corresponding to the head 51b of the pin body 51.

[0063] The inner wall portion 722 that defines the pin body head accommodating space 720 is a portion formed by integrating an upper tapered portion 722a and a lower tapered portion 722b. The upper tapered portion 722a and the lower tapered portion 722b gradually protrude toward the protrusion 73 as they move toward the back of the pin body head accommodating space 720. In other words, the pin body head accommodating space 720 has a generally triangular prism shape that narrows toward the back.

[0064] The inner wall portion 722 has, in its center portion, a pin body accommodating recessed space 722c that accommodates the cylindrical portion 51a of the pin body 51 of the engagement pin 5. Therefore, in the inner wall portion 722, the cylindrical portion 51a of the pin body 51 is inserted into the pin body accommodating recessed space 722c through the gap between the pointed tip portion of the upper tapered portion 722a and the pointed tip portion of the lower tapered portion 722b.

[0065] The inner wall 722 has an upper tapered portion 722a and a lower tapered portion 722b, which are formed symmetrically above and below the pin body accommodating recessed space 722c, and the distance between these portions gradually increases toward the front (in the direction of arrow e). This is to make it easier for the head 51b of the pin body 51 of the engagement pin 5 and the flange 52b of the moving ring 52 to enter the engagement recess 72.

[0066] The gap between the pointed tip of the upper tapered portion 722a and the pointed tip of the lower tapered portion 722b is the shortest, and this distance is slightly smaller than the outer diameter of the cylindrical portion 51a of the pin body 51 of the engagement pin 5.

[0067] Therefore, when the engagement pin 5 is finally attached to the engagement recess 72, the cylindrical portion 51a of the pin body 51 is pressed into the pin body accommodating recessed space 722c through the gap between the upper tapered portion 722a and the lower tapered portion 722b. In this finally attached state, the head 51b of the engagement pin 5 is accommodated in the pin body accommodating recessed space 722c of the inner wall portion 722, and axial movement of the head 51b is restricted.

[0068] The movable ring flange portion accommodating space 730 of the engagement recess 72 is a space formed between an inner wall surface 722n of the inner wall portion 722 and an inner wall surface 71n of the main body portion 71. The inner wall surface 71n of the main body portion 71 has protruding pieces 725, 726 that protrude from the upper side (direction of arrow a) and the lower side (direction of arrow b) at the tip side so as to face each other and restrict the movement of the flange portion 52b of the movable ring 52. In other words, the flange portion 52b of the moving ring 52 can come into contact with the protruding pieces 725, 726 of the main body portion 71 of the flap door fitting 7f, restricting the axial movement of the engagement pin 5.

[0069] As shown in Figures 11 and 12, the protrusion 73 of the flap door fitting 7f is a portion that protrudes from the side surface 71s that is generally fan-shaped when viewed from the side, and is adjacent to and integrated with the engagement recess 72 as shown in Figure 8, and is a portion that protrudes to the right (in the direction of arrow d) so as to move away from the side surface 71s of the main body 71.

[0070] The protrusion 73 has a flat surface 73a, a hooking surface 73b, and a sliding surface 73c. ​​The flat surface 73a of the protrusion 73 is a flat surface formed so as to slope from the upper side (in the direction of arrow a) to the lower side (in the direction of arrow b).

[0071] The hooking surface 73b of the protrusion 73 is a curved surface that extends in an arc shape downward (in the direction of arrow b) from the end of the flat surface 73a. The sliding surface 73c of the protrusion 73 is an arc-shaped surface that is connected to both the flat surface 73a and the hooking surface 73b and comes into contact with and slides against the attached portion 43a of the hook 43.

[0072] The length of the flat surface 73a of the protrusion 73 from the boundary between the flat surface 73a and the sliding surface 73c to the boundary between the flat surface 73a and the hooking surface 73b is the same as the length of the arm portion 43ba of the hook 43 in the longitudinal direction.

[0073] 12, when the flap door 4 is in an intermediate stage between the open state and the closed state, the arm portion 43ba of the hook 43 and the flat surface 73a of the protrusion 73 can come into surface contact. At this time, the claw portion 43bc of the hook 43 comes into contact with the latching surface 73b of the protrusion 73. In other words, the arm portion 43ba and the claw portion 43bc of the hook 43 are engaged with the protrusion 73, and the hook 43 is supported via the protrusion 73 so as to be able to rotate freely.

[0074] 1 and 11, when the flap door 4 is in the closed state, the handle 41 of the flap door 4 is in contact with the front end (in the direction of the arrow e) of the shelf board 3. Therefore, the flap door 4 cannot rotate any further, and the latched state in which the claw portion 43bc of the hook 43 is caught on the latching surface 73b of the protrusion 73 is maintained.

[0075] <How to install flap door hardware> Next, the procedure for attaching the flap door fitting 7f to the inside wall surface 21Ln of the side panel 21L will be explained in order with reference to Figures 13(A) to 13(E). Note that the same attachment method is used for the flap door fitting 7g, so its explanation will be omitted.

[0076] 13(A), the user inserts the engagement pin 5 into the dowel hole 22f located one level below the topmost dowel hole 22f provided on the inner wall surface 21Ln of the side plate 21L. At this time, the insertion portion 51c of the pin body 51 and the cylindrical portion 52a of the moving ring 52 of the engagement pin 5 are inserted into the dowel hole 22f until the flange portion 52b of the moving ring 52 comes into contact with the inner wall surface 21Ln.

[0077] 13(B), the user then inserts the insertion shaft 77 attached to the arm 75 of the flap door fitting 7f into the topmost dowel hole 22f provided on the inside wall surface 21Ln. In this state, the flap door fitting 7f becomes rotatable around the insertion shaft 77 within a range with the arm 75 as its radius.

[0078] 13(C) and (D), the user holds the main body 71 of the flap door fitting 7f in their hand and rotates it towards them (in the direction of arrow e). As a result, the head 51b of the pin main body 51 of the engagement pin 5 and the flange portion 52b of the moving ring 52 are accommodated in the pin main body head portion accommodating space 720 and the moving ring flange portion accommodating space 730 formed in the engagement recess 72 of the main body portion 71 of the flap door fitting 7f.

[0079] At this time, as shown in FIG. 10, the tapered surface 51bm of the head 51b of the pin body 51 of the engagement pin 5 comes into contact with the upper tapered portion 722a and the lower tapered portion 722b of the inner wall portion 722 that defines the pin body head accommodating space 720.

[0080] Here, the upper tapered portion 722a and the lower tapered portion 722b of the inner wall portion 722 of the engagement recess 72 gradually protrude toward the protrusion portion 73 as they move toward the back of the pin body head accommodating space 720, and the pin body head accommodating space 720 becomes narrower as it moves toward the back.

[0081] Therefore, when the main body 71 of the flap door fitting 7f is rotated, the head 51b of the pin body 51 of the engagement pin 5 moves toward the back side of the pin body head portion accommodating space 720. At this time, as the head 51b of the pin body 51 of the engagement pin 5 moves toward the back side of the pin body head portion accommodating space 720, the head 51b of the pin body 51 is pulled toward the protrusion 73 by the upper tapered portion 722a and lower tapered portion 722b of the inner wall portion 722.

[0082] The head 51b of the pin body 51 is pulled toward the protrusion 73, but the flange portion 52b of the movable ring 52 is in contact with the inner wall surface 722n of the inner wall portion 722, so the movable ring 52 does not move toward the protrusion 73.

[0083] This causes the cylindrical portion 52a to expand through the slit 52s of the moving ring 52 and to cover the outer peripheral surface 51cg of the inserted portion 51c of the pin main body 51. As a result, the inserted portion 51c of the pin main body 51 of the engaging pin 5 and the cylindrical portion 52a of the moving ring 52 come into strong contact with the inner peripheral surface of the dowel hole 22f in the inner wall surface 21Ln of the side plate 21L, creating an interference fit that prevents the engaging pin 5 from coming out.

[0084] At the same time, the cylindrical portion 51a of the pin body 51 of the engagement pin 5 is press-fitted into the pin body accommodating recessed space 722c through the gap between the upper tapered portion 722a and the lower tapered portion 722b of the inner wall portion 722 (FIG. 10).

[0085] As a result, as shown in Figure 13(E), the flap door fitting 7f and the engagement pin 5 are firmly fixed together, and the flap door fitting 7f is fixed to the inner wall surface 21Ln of the side panel 21L in a stable state without any rattle.

[0086] The flap door fitting 7g is also fixed to the dowel holes 22g formed in the inner wall surface 21Ln of the side plate 21L in the same manner as the flap door fitting 7f.

[0087] Thus, in the inner space of storage section 20a, flap-door fittings 7f on the front side (direction of arrow e) and flap-door fittings 7g on the back side (direction of arrow f) are arranged parallel to each other at the same height, as shown in Fig. 7. In a similar manner, flap-door fittings 7g are attached to the front side (direction of arrow e) and flap-door fittings 7f to the back side (direction of arrow f) of inner wall surface 21Rn of side panel 21R, as shown in Figs. 1 to 3.

[0088] <Actions and Effects> In the above configuration, in the flap-door storage cupboard 1, the flap-door fitting 7f rotatably attached to one dowel hole 22f on the inner wall surface 21Ln of the side panel 21L is rotated relative to the engagement pin 5 attached to one dowel hole 22f on the other dowel hole 22f on the inner wall surface 21Ln. As a result, the engagement pin 5 engages with the engagement recess 72 of the flap-door fitting 7f, and the flap-door fitting 7f is fixed to the inner wall surface 21Ln.

[0089] At this time, the engagement recess 72 of the flap door fitting 7f and the engagement pin 5 are firmly engaged, so the user can easily and firmly fix the flap door fitting 7f to the inner wall surface 21Ln of the side panel 21L with just a simple operation and without the need for tools.

[0090] In the flap-door storage cupboard 1, a total of four flap-door fittings 7f, 7g are fixed to the inside wall surfaces 21Ln, 21Rn of the side panels 21L, 21R, and the door body 40 of the flap door 4 can be slid using the top surface 71a of each body part 71 as a sliding surface to push it into or pull it out of the storage part 20a. Therefore, in the flap-door storage cupboard 1, the flap-door fittings 7f, 7g can also be used in place of slide rails, reducing the number of parts and simplifying the configuration.

[0091] In the flap-door storage cabinet 1, the flap-door fittings 7f, 7g can be fixed using the existing dowel holes 22f, 22g that are already provided in the inside wall surfaces 21Ln, 21Rn of the side panels 21L, 21R. This eliminates the need to provide new mounting holes in the inside wall surfaces 21Ln, 21Rn of the side panels 21L, 21R, and also means that no mounting holes remain as traces even after the flap-door fittings 7f, 7g are removed.

[0092] In the flap-door storage cupboard 1, when the door body 40 of the flap door 4 is placed on the four flap-door fittings 7f, 7g and stored in the storage section 20a, the door body 40 of the flap door 4 does not rest on the entire surface of the top surface 71a of the main body 71 of the flap-door fittings 7f, 7g. In reality, as shown in Figure 7, the door body 40 of the flap door 4 is placed in contact only with the highest vertex 71at on the upper side (direction of arrow a) of the top surface 71a.

[0093] Therefore, in the flap-door storage cabinet 1, the door body 40 only slides on the top surface 71a of the main body 71 of the flap-door fittings 7f, 7g when the flap door 4 is opening and closing between the open and closed states. As a result, the sliding resistance between the door body 40 and the top surface 71a of the main body 71 of the flap-door fittings 7f, 7g is not large, and the flap door 4 can be opened and closed smoothly.

[0094] Also, as shown in Figure 7, when the door body 40 of the flap door 4 is stored in the storage section 20a, the arm portions 43ba of the two hooks 43 attached to the door body 40 come into contact with the stopper pins 78 of the flap door fittings 7g fixed to the rear side (in the direction of arrow f), and the movement of the door body 40 is restricted at that position.

[0095] This is the position where the handle 41 of the door body 40 is flush with the storage section 20a without protruding. Therefore, the user can store the flap door 4 without the door body 40 going too far to the back (in the direction of the arrow f) without having to pay any special attention.

[0096] (3) Other embodiments In the above-described embodiment, the stopper pin 78 is provided on the main body 71 of the flap door fittings 7f, 7g, but the present invention is not limited to this, and it is also possible not to provide the stopper pin 78 depending on the application.

[0097] In addition, a person skilled in the art can appropriately modify the flap-door storage cabinet 1 of the present invention in accordance with conventionally known knowledge. As long as such modifications still have the configuration of the present invention, they are of course included in the scope of the present invention. [Explanation of symbols]

[0098] 1...Storage cupboard with flap door, 2...Cabinet, 3...Shelf, 4...Flap door, 5...Engagement pin, 7f, 7g...Fittings for flap door, 21L, 21R...Side panel, 21Ln, 21Rn...Inner wall, 21U...Top plate, 21D...Bottom plate, 20...Storage space, 20a to 20e...Storage section, 22f, 22g...Dowel hole, 40...Door body, 41...Handle, 41a...Main part, 43...Hook, 43a...Mounting part, 43b...Hooking part, 45, 47...Screw, 51...Pin body, 51a...Cylindrical part , 51b...head, 51c...inserted portion, 52...movable ring, 52a...cylindrical portion, 52b...flange portion, 52s...slit, 71...main body portion, 72...engagement recess, 73...protrusion portion, 75...arm portion, 77...insertion shaft, 78...stopper pin, 79...reinforcing pin, 720...pin main body head accommodating space, 730...movable ring flange portion accommodating space, 722...inner wall portion, 722a...upper tapered portion, 722b...lower tapered portion, 722c...pin main body accommodating recess space, 725, 726...protruding pieces.

Claims

1. Cabinet and a plate-shaped door body rotatably attached to the storage section of the cabinet to open and close the storage section; a flap door fitting that rotatably supports the door body; an engaging pin that is inserted into an insertion hole that is pre-formed on an inner wall surface of a side panel that forms the storage section of the cabinet and that engages with the flap door fitting; Equipped with The flap door fitting is a main body portion having a sliding portion that slidably moves the door body when the door body is stored in the storage portion; an insertion shaft that is integral with the main body and that is inserted into another insertion hole that is pre-formed in the inner wall surface of the side plate; an engagement recess provided at a tip end of the main body portion, the engagement recess engaging with a head of the engagement pin in a state in which the main body portion is rotated relative to the inner wall surface via the insertion shaft, and fixing the position of the main body portion relative to the inner wall surface; a protrusion provided at a tip of the main body portion, which rotatably hooks the door body via a hook provided on the door body; A storage cupboard with a flap door, characterized by having:

2. The engagement recess and the protrusion are integrated and adjacent to each other in the axial direction of the insertion shaft.

2. The storage cupboard with flap doors according to claim 1.

3. The main body portion is integrated with the insertion shaft and has an arm portion that rotates via the insertion shaft.

2. The storage cupboard with flap doors according to claim 1.

4. The insertion shaft has a cylindrical shape with a through hole, and a metal reinforcing pin is inserted into the through hole.

2. The storage cupboard with flap doors according to claim 1.

5. The door body has the hook on the back surface to be engaged with the protrusion, The main body has a stopper pin that comes into contact with the hook when the door main body is stored in the storage section.

2. The storage cupboard with flap doors according to claim 1.

6. A flap door fitting used to store the door body of a flap door in a storage section of a cabinet, a main body having a sliding part that moves a part of the door main body in a slidable state; an insertion shaft that is provided integrally with the main body and that is inserted into an insertion hole that is pre-formed on an inner wall surface of a side plate that forms the storage section; Equipped with The main body has an engagement recess provided at the tip of the main body, which is engaged with and fixed to a head of an engagement pin inserted into another insertion hole pre-formed on the inner wall surface of the side plate, and a protrusion that rotatably hooks the door main body via a hook provided on the door main body. A flap door fitting characterized by:

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