JP7752407B2 - Storage cabinets with flap doors and flap door hardware - Google Patents

Description

The present invention relates to a storage cabinet with flap doors that opens and closes the front opening of a furniture storage compartment, and in particular to a storage cabinet with flap doors and flap door fittings that are designed so that the doors are stored within the interior space of the storage compartment when open.

Traditionally, flap doors consist 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 horizontally to both side walls of the storage section.

The sliders and slide rails can all be molded from synthetic resin, making them extremely simple and inexpensive to manufacture. Furthermore, with this flap door, even an average user can very easily assemble the door body into a storage section such as a cabinet by simply fastening the slide rails and sliders in place with fixing screws.

Specifically, the slide rails are positioned horizontally against the upper portions of both side walls of the cabinet storage section, with the rail sliding sections facing upward, and are fixed by inserting fixing screws into the fixing holes on both the front and rear sides (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2018-048544

However, with the flap door described in Patent Document 1, it was necessary to drill fixing holes in both side walls of the cabinet storage section in order to insert fixing screws into them, and there was also the problem that the fixing holes remained when the slide rails were removed, which made for an unsightly appearance.

In addition, the slide rails must be attached to both side walls of the cabinet storage area using fixing screws, which requires tools, and it is not always easy for the average user to install the slide rails horizontally.

The present invention was made in consideration of the above points, and aims to provide a storage cabinet with flap doors and flap door hardware that can be easily installed and removed without the need for tools.

To solve this problem, the flap-door storage cupboard 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 that rotatably supports the door body, and an engagement pin that is inserted into an 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. The flap-door fitting has a main body with a sliding part that slidably moves the door body when storing the door body 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, 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.

In a storage cabinet with a flap door, 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.

In a storage cabinet 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.

In a storage cabinet with a flap door, it is preferable that the insertion shaft be cylindrical with a through-hole into which a metal reinforcing pin is inserted.

In a storage cabinet 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 unit.

The present invention also provides a flap door fitting used to store the door body of a flap door in a storage section of a cabinet, comprising a main body having a sliding portion that slidably moves a portion of the door body, and an insertion shaft that is formed integrally with the main body and inserted into one insertion hole pre-formed in the inner wall surface of a side plate that forms the storage section. The main body has an engagement recess provided at the tip of the main body that engages and secures with the head of an engagement 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.

The present invention makes it possible to create a storage cabinet with flap doors and flap door hardware that can be easily installed and removed without the need for tools.

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. 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. 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. FIG. 2 is a perspective view showing the configuration of the flap door in the present embodiment. FIG. 10 is a perspective view showing the configuration of a hook attached to a flap door in the present embodiment. FIG. 10 is a perspective view showing the configuration of an engagement pin for fixing the flap door in the present embodiment. FIG. 10 is a side view showing the state in which the flap door is stored in the present embodiment. FIG. 2 is a perspective view showing the configuration of the front side of the flap door fitting in the present embodiment. FIG. 2 is a perspective view showing the configuration of the back side of the flap door fitting in the present embodiment. 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. 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. 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. 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.

(1) Overview of the Embodiments First, an overview of a representative embodiment of the invention disclosed in this application will be described. Note that in the following description, as an example, reference numerals in the drawings corresponding to the components of the invention are written in parentheses.

[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) pivotally attached to a storage section (20a) of the cabinet (2) to open and close the storage section (20a), flap-door fittings (7f, 7g) that pivotally 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 panel (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). the main body (71) having a sliding portion (71a) that moves the door body (71) in this state; an insertion shaft (77) that is integral 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 provided at the tip of the main body (71) and that engages with the head (51b) of the engagement pin (5) when the main body (71) is rotated relative to the inner wall surface (21Ln) via the insertion shaft (77), thereby fixing the position of the main body (71) relative to the inner wall surface (21Ln); and a protrusion (73) that is provided at the tip of the main body (71) and that rotatably hooks the door body (40) via a hook (43) provided on the door body (40).

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

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

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

[5] In the flap-door storage cabinet (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).

[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 slidably moves a portion of the door body (40), and a sliding section (71a) that is integral with the main body (71) and is pre-formed on the inner wall surface (21Ln) of the side panel (21L) that forms the storage section (20a). The main body (71) has 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 engages with and fixes the 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) provided on the door main body (40).

(2) The Present Embodiment The configuration of a flap-door storage cupboard according to the present 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 the present 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 the present 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 the present embodiment. Fig. 4 is a perspective view showing the configuration of the flap door in the present embodiment. Fig. 5 is a perspective view showing the configuration of a hook attached to the flap door in the present embodiment. Fig. 6 is a perspective view showing the configuration of an engagement pin for securing the flap door in the present embodiment. Fig. 7 is a side view showing the stored state of the flap door in the present embodiment. Fig. 8 is a perspective view showing the configuration of the front side of a flap-door hardware in the present embodiment. Fig. 9 is a perspective view showing the configuration of the back side of a flap-door hardware in the present embodiment. Fig. 10 is a perspective view showing the engagement between the engagement recess of the flap-door hardware and the engagement pin in the present 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 in this embodiment, from the moment the flap door fitting is engaged with the engagement pin to the moment it is fixed.

For ease of explanation, when the flap-door storage cabinet 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 viewing the flap door 4 of the flap-door storage cabinet 1 from the front, will be referred to as the left or leftward direction, and the direction of arrow d, when viewing the flap door 4 from the front, will be referred to as the right or rightward direction. Furthermore, the direction of arrow e, when viewing the flap door 4 of the flap-door storage cabinet 1 from the front, will be referred to as the near or forward direction, and the direction of arrow f, when viewing 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 ease of explanation only, and may be defined as different directions depending on the usage of the flap-door storage cabinet 1.

<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).

The cabinet 2 is formed by side panels 21L and 21R that face each other in the left-right direction (the direction of arrows cd), and a top panel 21U and a bottom panel 21D that face each other in the up-down direction (the direction of arrows ab).

The cabinet 2 has a vertically elongated storage space 20 formed by side panels 21L, 21R, a top panel 21U, and a bottom panel 21D. The cabinet 2 has multiple storage sections 20a to 20e, with the storage space 20 separated by multiple (in this case, four) shelves 3.

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

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 "mortises") 22f, 22g formed in the vertical direction on the front side (direction of arrow e) and the back side (direction of arrow f) of the storage space 20 as insertion holes for engagement pins 5, which will be described later.

Here, when viewing the flap door 4 from the front, there are multiple dowel holes 22f on the near side of the storage space 20 (in the direction of arrow e), and there are multiple dowel holes 22g on the far side of the storage space 20 (in the direction of arrow f).

The shelf board 3 rests 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 panels 21L, 21R.

Flap door fittings 7f, 7g are attached to the inner wall surface 21Ln of side panel 21L via dowel holes 22f, 22g. Flap door fittings 7f, 7g are also attached to the inner wall surface 21Rn of side panel 21R via dowel holes 22f, 22g.

That is, flap door fittings 7f are attached to the front side of 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 inner wall surface 21Rn and flap door fittings 7f are attached to the back side. Flap door fittings 7f and 7g have the same basic structure and shape; they are only oriented differently.

The flap-door storage cabinet 1 can be moved between a closed state (Figure 1) in which the flap door 4 is closed relative to the storage section 20a, and an open state (Figure 3) in which the flap door 4 is open relative to the storage section 20a. It is attached so as to be freely rotatable (Figure 2) via two flap-door fittings 7f, 7g fixed to the front side (in the direction of arrow e) above the storage section 20a.

<Flap door>
As described above, the flap door 4 is rotatably provided 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.

As shown in Figures 1 to 3, the flap door 4 rotates so that it is 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) to be 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 rests on top of the four flap door fittings 7f, 7g.

As shown in Figure 4, the flap door 4 comprises a door body 40 made of a plate-like member that is rectangular in plan view, a handle 41 with a generally U-shaped cross section that is attached with fasteners such as screws (not shown) so as to completely cover the lower end of the door body 40, and two hooks 43 that are attached with fasteners such as screws 47 to both upper ends of the door body 40.

The handle 41 of the flap door 4 has a roughly L-shaped cross-section stand 41a 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 other object leaning against the front surface 40a, and also functions as a handle for turning the door body 40 when opening or closing it.

The hooks 43 of the flap door 4 are components that hook onto both ends of the upper side (in the direction of arrow a) of the back surface 40b of the door body 40 in the left-right direction (in the direction of arrows cd) 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.

As shown in Figure 5, the hook 43 has a plate-shaped mounting portion 43a that is attached to the back surface 40b of the door body 40 of the flap door 4, and a generally L-shaped latch portion 43b that protrudes from the mounting portion 43a. The mounting portion 43a is attached to the back surface 40b of the door body 40 with screws 47 (Figure 4) via two upper and lower through holes 43ah.

The latching portion 43b of the hook 43 is the portion that latches onto the protrusion 73 (FIGS. 8 to 12) of the flap door fittings 7f, 7g, described below. The latching portion 43b has an arm portion 43ba that is perpendicular to the surface of the attachment portion 43a and protrudes toward the rear (in the direction of arrow f) away from the surface of the attachment 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 attachment portion 43a. In other words, the latching portion 43b of the hook 43 is formed in a roughly L-shape by the arm portion 43ba and the claw portion 43bc.

<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.

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 to the pin body 51 so that it can move axially. In the engagement pin 5, the pin body 51 and the movable ring 52 are arranged coaxially.

The pin body 51 of the engagement pin 5 consists of a cylindrical portion 51a with a predetermined outer diameter, a truncated conical head portion 51b formed at one end of the cylindrical portion 51a and having a larger outer diameter than the cylindrical portion 51a, and a cylindrical insertion 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.

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

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 and 22g. The inserted portion 51c has an outer peripheral surface 51cg and a tapered surface 51cm that slopes from the outer peripheral surface 51cg toward the cylindrical portion 51a.

The moving ring 52 of the engagement pin 5 has a cylindrical portion 52a attached to surround the outer circumferential surface of the cylindrical portion 51a of the pin body 51, and an annular flange portion 52b formed integrally with the cylindrical portion 52a.

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 movable ring 52 is formed to be movable in the axial direction (longitudinal direction) between the head portion 51b and the inserted portion 51c of the pin body 51.

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

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 movable 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 movable ring 52 abuts against the inner wall surfaces 21Ln, 21Rn, leaving only the flange portion 52b of the movable ring 52 and the head portion 51b of the pin body 51 exposed.

<Flap door fittings>
Next, the configuration of the flap door fittings 7 (7f, 7g) will be described. As shown in Figure 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 panel 21L, and the flap door fitting 7g is attached to the rear side (direction of arrow f) of the inner wall surface 21Ln of the side panel 21L.

The flap door fittings 7f and 7g have the same basic shape and structure, with the only difference being that they are reversed left to right. For this reason, only the flap door fitting 7f will be described below, and a description of the flap door fitting 7g will be omitted.

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 (in the direction of arrow e) and becomes higher towards the back side (in the direction of arrow f), a protrusion 73 that protrudes from the tip of the main body 71 on the front side (in the direction of arrow e) in a direction away from the main body 71 on the right side (in the 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 panel 21L.

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

As shown in Figure 9, the insertion shaft 77 is cylindrical with a through hole 77h that communicates with the through hole 75h of the arm 75. A metal reinforcing pin 79 (Figure 8) is press-fitted into the through hole 75h of the arm 75 and the through hole 77h of the insertion shaft 77. As a result, the insertion shaft 77 of the arm 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 75 is attached so that it is in close contact with the inner wall surface 21Ln.

The main body 71 of the flap door fitting 7f has a flat top surface 71a on the upper side (in the direction of arrow a). The top surface 71a of the flap door fitting 7f is the 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.

An engagement recess 72 is formed at the front end (in the direction of arrow e) of the main body 71, 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 75 is the same as the distance between the multiple dowel holes 22f formed in the inner wall surface 21Ln of the side panel 21L.

The main body 71 of the flap door fitting 7f has a through-hole 71h that penetrates the center 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; a stopper pin 78 is press-fitted only into the flap door fitting 7g (Figure 7). When the stopper pin 78 is press-fitted into the through-hole 71h of the main body 71 of the flap door fitting 7g (Figure 7), it protrudes a predetermined length from the side surface 71s.

The stopper pin 78 protrudes in the same direction as the insertion axis 77 of the arm portion 75, but in the opposite direction to the insertion axis 77. Therefore, as shown in Figure 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 movement of the door body 40 toward the rear (in the direction of arrow f).

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.

The pin body head accommodating space 720 of the engagement recess 72 is a space surrounded by an inner side surface 720n that faces the top surface 51bu of the head 51b of the pin body 51 of the engagement pin 5, and an inner wall portion 722 that contacts the tapered surface 51bm of the head 51b. The pin body head accommodating space 720 of the engagement recess 72 has a roughly triangular prism-shaped spatial shape that corresponds to the head 51b of the pin body 51.

The inner wall portion 722 that defines the pin body head accommodating space 720 is formed by an integrated 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 approach the back of the pin body head accommodating space 720. In other words, the pin body head accommodating space 720 has a roughly triangular prism-shaped space that narrows as it approaches the back.

The inner wall portion 722 has a pin body accommodating recessed space 722c in its center 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.

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 recess 722c, and the distance between them gradually increases toward the front (in the direction of arrow e). This allows the head 51b of the pin body 51 of the engagement pin 5 and the flange 52b of the movable ring 52 to easily fit into the engagement recess 72.

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.

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 recess space 722c through the gap between the upper tapered portion 722a and the lower tapered portion 722b. In this finally attached state, the head portion 51b of the engagement pin 5 is accommodated in the pin body accommodating recess space 722c of the inner wall portion 722, restricting axial movement of the head portion 51b.

The movable ring flange portion accommodating space 730 of the engagement recess 72 is a space formed between the inner wall surface 722n of the inner wall portion 722 and the 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 top (direction of arrow a) and bottom (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 movable 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.

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, which is generally sector-shaped in side view, and is adjacent to and integrated with the engagement recess 72 as shown in Figure 8, and protrudes to the right (in the direction of arrow d) away from the side surface 71s of the main body 71.

The protrusion 73 has a flat surface 73a, a latching surface 73b, and a sliding surface 73c. The flat surface 73a of the protrusion 73 is a flat surface that is inclined from the top (in the direction of arrow a) to the bottom (in the direction of arrow b).

The hooking surface 73b of the protrusion 73 is a curved surface that extends in an arc 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.

The length of the flat surface 73a of this 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 longitudinal length of the arm portion 43ba of the hook 43.

Therefore, as shown in Figure 12, when the flap door 4 is in an intermediate stage between the open and closed states, 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 is in contact with the latching surface 73b of the protrusion 73. In other words, the arm portion 43ba and claw portion 43bc of the hook 43 are engaged with the protrusion 73, and the hook 43 is supported via the protrusion 73 so that it can rotate freely.

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

<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.

As shown in Figure 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 movable ring 52 of the engagement pin 5 are inserted into the dowel hole 22f until the flange portion 52b of the movable ring 52 comes into contact with the inner wall surface 21Ln.

As shown in Figure 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 inner wall surface 21Ln. In this state, the flap door fitting 7f can rotate around the insertion shaft 77 within a range with the arm 75 as its radius.

As shown in Figures 13(C) and (D), the user holds the main body 71 of the flap door fitting 7f and rotates it toward the user (in the direction of arrow e). This causes the head 51b of the pin main body 51 of the engagement pin 5 and the flange 52b of the movable ring 52 to be accommodated in the pin main body head accommodating space 720 and movable ring flange accommodating space 730 formed in the engagement recess 72 of the main body 71 of the flap door fitting 7f.

At this time, as shown in Figure 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 lower tapered portion 722b of the inner wall 722 that defines the pin body head accommodating space 720.

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 73 as they approach the back of the pin body head accommodating space 720, and the pin body head accommodating space 720 becomes narrower as it approaches the back.

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 of the pin body head accommodating space 720. At this time, as the head 51b of the pin body 51 of the engagement pin 5 moves toward the back of the pin body head accommodating space 720, the upper tapered portion 722a and lower tapered portion 722b of the inner wall portion 722 pull the head 51b of the pin body 51 toward the protrusion 73.

The head 51b of the pin body 51 is pulled toward the protrusion 73, but the flange 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.

This causes the cylindrical portion 52a to expand through the slit 52s of the movable ring 52 and fit over the outer peripheral surface 51cg of the inserted portion 51c of the pin body 51. This causes the inserted portion 51c of the pin body 51 of the engagement pin 5 and the cylindrical portion 52a of the movable ring 52 to abut firmly against 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 engagement pin 5 from coming loose.

At the same time, the cylindrical portion 51a of the pin body 51 of the engagement pin 5 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 of the inner wall portion 722 (Figure 10).

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 manner without any rattle.

The flap door fittings 7g are also fixed to the dowel holes 22g formed in the inner wall surface 21Ln of the side panel 21L in the same manner as the flap door fittings 7f.

Thus, in the interior space of storage section 20a, as shown in Figure 7, flap door fitting 7f on the front side (direction of arrow e) and flap door fitting 7g on the rear side (direction of arrow f) are arranged parallel and at the same height. Using a similar method, flap door fitting 7g is attached to the front side (direction of arrow e) and flap door fitting 7f to the rear side (direction of arrow f) on the inner wall surface 21Rn of side panel 21R, as shown in Figures 1 to 3.

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

At this time, the engagement recess 72 of the flap door fitting 7f and the engagement pin 5 firmly engage, allowing the user to easily and firmly secure the flap door fitting 7f to the inner wall surface 21Ln of the side panel 21L with just a simple operation and no tools required.

In the flap-door storage cabinet 1, a total of four flap-door fittings 7f, 7g are fixed to the inner wall surfaces 21Ln, 21Rn of the side panels 21L, 21R, and the top surfaces 71a of the main bodies 71 of the flap doors 4 can be used as sliding surfaces to slide the door bodies 40 of the flap doors 4 into or out of the storage section 20a. Therefore, in the flap-door storage cabinet 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.

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 on the inner wall surfaces 21Ln, 21Rn of the side panels 21L, 21R. This eliminates the need to provide new mounting holes on the inner wall surfaces 21Ln, 21Rn of the side panels 21L, 21R, and also means that no mounting holes remain as marks even after the flap-door fittings 7f, 7g are removed.

When the flap-door storage cabinet 1 is stored in the storage section 20a with the door body 40 of the flap door 4 placed on the four flap-door fittings 7f, 7g, the door body 40 of the flap door 4 does not rest on the entire 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.

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 great, allowing the flap door 4 to be opened and closed smoothly.

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 pin 78 of the flap door fitting 7g fixed to the rear side (in the direction of arrow f), restricting movement of the door body 40 at that position.

This is a position where the handle 41 of the door body 40 is flush with the storage section 20a and does not protrude. Therefore, the user can store the flap door 4 without having to pay any special attention, without the door body 40 of the flap door 4 being pushed too far back (in the direction of arrow f).

(3) Other Embodiments In the present embodiment described above, 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 the stopper pin 78 may not be provided depending on the application.

In addition, those skilled in the art can modify the flap-door storage cabinet 1 of the present invention as appropriate, based on previously known knowledge. As long as such modifications still retain the configuration of the present invention, they are of course included within the scope of the present invention.

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 surface, 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 (6)

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: The storage cupboard with flap doors according to claim 1, wherein the engagement recess and the protrusion are integrated and adjacent to each other in the axial direction of the insertion shaft. The storage cupboard with flap doors according to claim 1, wherein the main body has an arm portion that is integrated with the insertion shaft and rotates via the insertion shaft. The storage cupboard with flap doors according to claim 1, wherein the insertion shaft is cylindrical and has a through hole into which a metal reinforcing pin is inserted. The door body has the hook on the back surface to be engaged with the protrusion,
The storage cupboard with flap doors according to claim 1, wherein 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. 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 engaging recess provided at a tip end of the main body, which engages with and is fixed to a head of an engaging pin inserted into another insertion hole pre-formed on the inner wall surface of the side panel, and a protrusion which rotatably hooks the door main body via a hook provided on the door main body.