JP4919889B2 - Opening / closing device for left-right double-opening opening / closing body in joinery - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an opening / closing device for a left / right double opening / closing body in a fitting, and in particular, a left / right double opening in a fitting suitable for a window whose fixed side is a window frame, while the opening / closing body is opened in both directions (either left or right). The present invention relates to an opening / closing device for an opening / closing body.

  Patent Literature 1 and Patent Literature 2 are technologies related to an opening / closing device of a left / right double opening / closing body, and these opening / closing devices are respectively applied to a transportable refrigerator. For example, the opening / closing device of Patent Document 2 is a long-slip-shaped connecting link disposed in a horizontal direction on the opening / closing body, a pair of left and right interlocking pieces respectively connected to the left and right ends of the connecting link, and having engaging means. A pair of left and right rack plates that are provided so as to engage with the interlocking pieces and that engage with and disengage from the hinge pin on the refrigerator body side, and the door that closes the opening of the refrigerator body is pivotally attached to either the left or right ( When in the (restraint) state, it can be opened from the other side of the unconstrained state.

Patent Document 3 describes a door locking device. For example, a door locking device disclosed in Patent Document 4 is provided in a housing, and a driving member (for example, a pinion) that rotates by a predetermined amount by a rotating operation of a handle provided on the outer surface of the door, and an interlocking member that meshes with the driving member ( A power conversion mechanism including a rack) is disposed along the vertical direction of the opening and closing body, and is engaged with and disengaged from a receiving seat disposed on a horizontal frame of the door frame at a distal end portion of the connecting plate constituting the interlocking member. A locking member is integrally attached. Patent Document 4 describes a corner member in which the lengths of the vertical portion and the horizontal portion are displaced in accordance with the movement in the vertical direction.
Japanese Patent Publication No. 3-35476 Utility Model Registration Gazette No. 2509585 JP 2002-364226 A Japanese Utility Model Publication No. 7-32211

  The intended purpose of the present invention is to enable the opening / closing body for joinery called a window or a shoji to be opened / closed selectively from either the left or right side by the mutual displacement of a pair of left and right operating members. That is. The second purpose is to simultaneously lock both the vertical and horizontal sides of the opening / closing body at the closed position of the opening / closing body, and the desired one side (left side or right side) of the opening / closing body. In the case of opening, it is to simultaneously unlock both the downside and the downside by the operating force of the operating member on one side. A third object is to reliably capture the side end portion when the hinge member on the door frame side pivots one side end portion of the opening / closing body.

  The opening and closing device of the left and right double opening and closing body in the fitting of the present invention is arranged to move up and down by the operating force of the operating member of the opening and closing body at the hinge member on the door frame side, on the other hand, And a first engagement member that engages with the hinge member, and is disposed at a corner of the opening / closing body so as to be interlocked with the first engagement member, and is moved vertically along with the vertical movement of the first engagement member. A corner member in which the lengths of the portion and the lateral portion are displaced, an engagement slider disposed so as to be horizontally movable on the side of the opening / closing body so as to cooperate with the corner member, and an engaged portion of the engagement slider It has a connecting part to be engaged and disengaged and is a second engaging member provided on the hinge member, and when selecting the opening / closing direction of the opening / closing body, the operation member on one side is the first engaging member on one side Is prevented from coming out of the hinge member, and the engagement slider on one side is the second on one side. At the same time, the operation member on the other side is positioned at the same time so as not to come out of the joint member, and the first engagement member and the engagement slider on the other side are corresponding hinge members so that the opening / closing body can be opened. And it positions so that it can each leave | separate from a 2nd engagement member, It is characterized by the above-mentioned.

(A) The invention described in the independent claim can selectively open and close the opening and closing body for a joint called a window or a shoji from either the left or right side by the mutual displacement of a pair of left and right operation members. In addition, in the closed position of the opening / closing body, both the vertical and lateral sides of the opening / closing body can be locked at the same time, and when the desired one side (left side or right side) of the opening / closing body is opened. Each member is smoothly operated by the operating force of the operating member on one side, so that both the downside and downside locked states can be simultaneously released.
(B) In other words, when selecting the opening / closing direction of the opening / closing body, the operating member on one side is arranged so that the first engaging member on one side does not come off from the hinge member and the engaging slider on one side is The other side operation member is positioned so as not to come out of the second engagement member, and the other side operation member is arranged such that the first engagement member on the other side is detached from the hinge member (including the disengaged state). The engagement slider is positioned in a state of being disengaged from the second engagement member on the other side (including a state where it can be disengaged).
(C) In the invention according to claim 2, the opening angle of the opening / closing body can be set within a predetermined range. Moreover, the opening / closing body does not fall easily.
(D) The invention according to claim 3 can reliably capture the side end of the opening / closing body.

  Hereinafter, the best mode for carrying out the present invention shown in FIGS. 1 to 10 will be described.

(1) Environment for Implementing the Invention FIG. 1 is a schematic explanatory diagram showing the environment for implementing the invention. In FIGS. 1A and 1B, the members having the same configuration are appropriately arranged on the right and left and top and bottom of the fitting, so that only the positional relationship of the main members is schematically shown for convenience of explanation. It is shown.

  In FIG. 1A, when the opening / closing body is in a closed state, the operation portion 4a of the left operation member 4 is in a vertical state, while the operation portion 4a of the right operation member 4 is in a horizontal state. In this case, the vertical engaging member (hereinafter referred to as “first engaging member”) on the one side of the opening / closing body 2 is moved by the operating force of the left operating member 4 to the hinge on the door frame side via the power conversion mechanism. Displace to a position where it can be released from the member. As a result, when the opening / closing body 2 is opened horizontally from the left side (one side) as shown in FIG. 1B, for example, the right side (the other side) of the opening / closing body 2 is captured by the hinge member ( For example, since the plurality of receiving grooves of the first engaging member are respectively engaged with the plurality of locking projections of the hinge member, the first engaging member rotates about the axis of the other vertical axis (FIG. 1 shows the left side). Example of unconstrained, right-handed restraint).

  In particular, in this embodiment, the upper and lower second engaging members (extensible arms) 10 are integrally connected to the movable pieces constituting the upper and lower hinge members of the opening and closing body 2, respectively, so that the opening and closing body is on one side or When opening and closing from the other side, the second engagement member (extensible arm) 10 expands or contracts.

  In FIGS. 1A and 1B, first, reference numeral 1 denotes a door frame as a fitting, and this door frame 1 includes an upper and lower horizontal frame 1a and left and right vertical frames 1b. The sash-type upper and lower horizontal frames 1a and left and right vertical frames 1b form an opening 3 for an opening / closing body (for example, a window) 2 as is well known.

  Therefore, the opening / closing body 2 has an upper and lower horizontal reed 2a and left and right reed frames 2b corresponding to the form of the door frame 1. In the present embodiment, since the opening / closing body 2 is a left-right double-opening system, the left and right vertical rods 2b can each be a door.

  Next, 4 is a pair of left and right operation members (for example, L-shaped handles) provided at the center of the left and right end portions (left and right vertical rods) 2b on the inner wall surface side of the opening / closing body 2, respectively. An insertion shaft portion 4b provided in a direction orthogonal to the operation portion 4a of the operation member 4 is inserted into a through hole of the mounting seat 5, and is fixedly connected to a drive member 36 constituting a power conversion mechanism 6 described later. .

  In addition, at the left and right end portions 2 b of the opening / closing body 2, main components of a power conversion mechanism (virtual line) 6 that is operated by the operation force of the operation member 4 are vertically arranged around the drive member 36. And it arrange | positions so that it may synchronize.

  Further, a total of four first engaging members 7 are fixedly arranged at the upper and lower end portions of the left and right end portions 2b of the opening / closing body 2 so as to be movable up and down. In addition, the first engagement members 7 are arranged symmetrically, for example, at the upper and lower ends of the left and right side ends of the door, respectively, and the upper and lower first engagement members 7 are It is synchronized in the vertical direction by the driving force of the power conversion mechanism 6.

  Next, horizontal rails 18 for the engagement sliders 9 are respectively disposed on the upper and lower horizontal bars 2a of the opening / closing body. In addition, vertical rails 19 for the first engagement member 7 are also provided on the left and right vertical rods 2b of the opening / closing body, respectively.

  In this embodiment, when the left and right operation members 4 are set to the engaged positions, for example, when the door is closed, the first engagement members 7 of the left and right vertical rods 2b of the opening / closing body 2 are a total of four on the door frame 1 side. The hinge members 8 are engaged with each other. At the same time, a total of four engagement sliders 9 are provided integrally with the movable piece 8d of the hinge member 8 so as to be horizontally movable on the horizontal bar 2a of the opening / closing body 2 and cooperate with the corner member 21 on the opening / closing body side. The second engaging members 10 are respectively engaged.

  Therefore, if the operating member that wants to open the opening / closing body 2 is operated, for example, the operating member 4 on the other side is operated, the first engaging member 7 on the other side is displaced from the hinge member 8 and at the same time, The engagement slider 9 on the side is positioned in a state where it is removed from the second engagement member 10 on the other side. Therefore, the opening / closing body 2 can be opened from the other side.

  Hereinafter, the specific requirements of the present invention will be described in order, but detailed descriptions and symbols are omitted. In this embodiment, the main members such as the hinge member, the first engagement member, the engagement slider, and the second engagement member are arranged on the left and right and up and down of the door frame or the opening / closing body. Only common members will be described in detail, and common members will be denoted by the same reference numerals and redundant description will be omitted.

(2) Hinge member on the door frame side A total of four hinge members 8 are arranged on the left, right, top and bottom of the door frame. FIG. 2 shows a pair of left and right hinge members 8, a first engagement member 7, a second engagement member 10, an engagement slider 9 and the like which are symmetrically disposed at the lower ends of the left and right door frames 1b. Yes. The pair of left and right hinge members 8 are similarly disposed at the upper ends of the left and right door frames 1b, but are omitted for convenience. For convenience, FIG. 3 also illustrates the hinge member 8, the first engagement member 7 and the like on the right side of FIG.

  Now, the configuration of the hinge member 8 will be described with reference to FIGS. FIG. 3A is a schematic explanatory view from a front view, and FIG. 3B is a schematic explanatory view from a plan view. The hinge member 8 of this embodiment is composed of an upper movable piece 8a, a lower movable piece 8d, and a fixed vertical shaft 11. The upper movable piece 8a has a vertical plate-like portion in a vertical frame and a lower end portion of the plate-like portion. The plate-like portion is provided with a plurality of locking projections 8c spaced apart by a predetermined distance in the longitudinal direction, and these locking projections 8c are provided on the opening / closing body 2 side. The lower movable piece 8d that engages with the upper and lower receiving grooves 12 of the first engaging member 7 and has a bearing portion is provided at the base end portion of the second engaging member 10 whose free end portion is connected to the opening / closing body 2. It is connected.

  Additional description will be given of each configuration of the hinge member 8. Generally, the hinge member 8 is generally classified into an upper movable piece, a lower movable piece, and a vertical axis. In this embodiment, the upper movable piece 8a is disposed on the door frame 1 as described above, while the lower movable piece is movable downward. The piece 8d is connected to the opening / closing body 2 via the telescopic arm 10. The opening / closing body 2 rotates via a lower movable piece 8d that is supported by a fixed vertical shaft 11.

  The upper movable piece 8a has a long plate-like portion. Further, the bearing portion 8b of the upper movable piece 8a is formed so as to project in a short cylindrical shape at the lower end portion (outer end portion) of the plate-like portion 8a so as to be shifted outward. FIG. 3B shows that the bearing portion 8b and the vertical shaft 11 are located on the outdoor side of the vertical frame 1b.

  The locking projection 8c is formed to project from one side surface (vertical side of the opening / closing body) of the plate-shaped portion, and engages with the receiving groove 12 of the first engagement member 7, and the engagement portion 8c And a flange portion provided around the tip portion. The flange portion engages with the edge of the receiving groove 12. The upper and lower locking projections 8c are provided, for example, at the inner end of the hinge member 8 and at the center, but the number and position of the locking projections 8b are matters that can be appropriately designed.

  Thus, the locking projections 8b are respectively engaged with the upper and lower receiving grooves 12 having the lateral entrance 12a and the longitudinal engagement long hole 12b communicating with the lateral entrance.

  As shown in FIG. 3A, the bearing portion 8 b of the upper movable piece 8 a and the bearing portion of the lower movable piece 8 d are externally fitted to the vertical shaft 11. The upper and lower movable pieces 8 a and 8 d can rotate around the axis of the vertical shaft 11. In this embodiment, the movable piece 8a on the door frame side captures the first engaging member 7 moving in the vertical direction on the opening / closing body side in the locked state, or releases the locked state with the first engaging member 7. It plays a role of releasing the first engaging member 7.

(3) Relationship Between Hinge Member and First Engagement Member As shown in FIG. 1, the operation member 4 is rotatably provided at the center of the side end portion of the opening / closing body 2. The first engagement member 7 is engaged with the vertical rail 19 of the vertical rod 2 b in a “set” on the upper end side and lower end side of the side end of the opening / closing body 2. When the operation member 4 is rotated to a predetermined position, the upper and lower sets of first engaging members 7 are simultaneously displaced in the vertical direction by the driving force of the power conversion mechanism 6.

  1 and 2, the left operating member 4 allows the pair of upper and lower first engaging members 7 located on the left side to escape from the receiving grooves 12 of the corresponding pair of upper and lower hinge members 8 on the door frame side. On the other hand, a set of upper and lower first engaging members 7 positioned on the right side is always engaged with receiving grooves 12 of a corresponding set of upper and lower hinge members 8 on the door frame side. It is set to the matching position.

  As shown in FIGS. 4 and 5, the left and right first engaging members 7 having a long plate shape each have a total of three notches in the vertical direction. The uppermost rectangular cutout 13 is for the connecting member 14. The two cutouts located below the rectangular cutout 13 are the upper and lower receiving grooves 12 described above. The upper and lower locking projections 8c of the hinge member 8 are simultaneously engaged with and disengaged from the two receiving grooves 12 spaced apart in the vertical direction.

  Accordingly, the receiving groove 12 includes a lateral doorway 12a for receiving or releasing the locking protrusion 8c, and a longitudinal engagement long hole 12b communicating with the lateral doorway 12a and guiding the locking protrusion 8c in the vertical direction. Become. The lateral entrance 12a is notched in a trumpet shape.

  4 shows the positional relationship between the receiving groove 12 of the first engaging member 7 on the left side of FIG. 1A and the locking protrusion 8c of the hinge member 8. In FIG. In this case, the left operation member 4 shown in FIG. 2 is rotated from the horizontal state to the vertical state. Then, the left first engaging member 7 is lowered from the position of the imaginary line to the position of the solid line via the power conversion mechanism by the operation force of the operation member 4. As a result, the locking protrusion 8c of the hinge member 8 is located in the vicinity of the lateral doorway 12a of the receiving groove 12, so that when the opening / closing body 2 is opened, the first engagement member is detached from the hinge member.

  On the other hand, FIG. 5 shows the positional relationship between the receiving groove 12 of the first engaging member 7 on the right side of FIG. 1A and the locking projection 8 c of the hinge member 8. In this case, the right operation member 4 shown in FIG. 2 is rotated from the vertical state to the horizontal state. Then, the first engagement member 7 on the right side rises from the position of the imaginary line to the position of the solid line via the power conversion mechanism by the operation force of the operation member 4. As a result, the locking protrusion 8c of the hinge member 8 enters from the vicinity of the lateral entrance / exit 12a of the receiving groove 12 into the depth of the longitudinal engagement long hole 12b. Therefore, even if the opening / closing body 2 is opened, the first engagement member Does not come off the hinge member.

(4) Power conversion mechanism 6
As shown in FIGS. 1 and 2, the power conversion mechanism 6 has a structure that converts the rotational movement of the operation member 4 into a vertical reciprocating movement, and therefore corresponds to the left and right operation members 4 provided on the opening / closing body 2. A pair is arranged on the left and right. Further, in the power conversion mechanism 6, the member provided on the upper side and the member provided on the lower side are the same on the basis of the drive member 36 that is connected to the insertion shaft portion 4 b of the operation member 4 so as not to be relatively rotatable. Then, with reference to FIG.2 and FIG.7, the structural member arrange | positioned under the starboard 2b of the opening / closing body 2 is demonstrated.

  Reference numeral 35 denotes a housing fixedly mounted on the starboard 2b. The housing 35 guides an elevating member 37 having a vertical rack 38 that meshes with a drive member (for example, a pinion) 36.

  Therefore, the power conversion mechanism 6 includes, for example, a pinion 36 that rotates on the drive shaft of the operation member 4, a rack 38 that meshes with the pinion 36, and a long elevating plate 37 having the rack 38.

  With reference to FIG. 2, in this embodiment, the upper end portion of the elongated first engagement member 7 is connected to the lower end portion of the elevating plate 37, and the plate-like connection is connected to the first engagement member 7. The longitudinal ends of the corner members 21 are connected via the member 14.

(5) Corner member 21
The corner member 21 is provided along the flange of the opening / closing body 2 via an angle-shaped duct 20 (see FIG. 8) disposed at the corner of the opening / closing body 2 so as to be interlocked with the first engagement member. ing.

  Thus, the corner member 21 is a member in which the lengths of the straight lines of the vertical portion 21a and the horizontal portion 21b are displaced as the first engagement member 7 moves in the vertical direction. An example of the corner member 21 is described in Japanese Utility Model Laid-Open No. 7-32211. Accordingly, although not particularly numbered, the corner member 21 includes a plurality of short links provided with pivots at both ends in the moving direction, for example, guide portions such as quarter-circular arc-shaped grooves and spaces. It is guided to a duct 20 having an inverted L shape (in the case of FIG. 8). In this embodiment, the end of the vertical portion 21 a of the corner member 21 is appropriately connected to the connecting member 14, while the end of the horizontal portion 21 b of the corner member 21 is the horizontal rail of the horizontal rod 2 a of the opening / closing body 2. Are appropriately connected to one end of the engaging slider 9 guided by the.

(6) Engagement slider 9
The engagement slider 9 is disposed on the horizontal bar 2a of the opening / closing body 2 through the horizontal rail 18 so as to be able to move horizontally so as to cooperate with the corner member 21. The engagement slider 9 has an engaged portion 9a that is formed by notching a predetermined amount in the longitudinal direction from one end surface on one end portion side. The protrusion-like connecting portion 23 of the second engaging member 10 connected to the horizontally movable piece 8d of the hinge member 8 is engaged with and disengaged from the engaged portion 9a. The engagement relationship between the engagement slider 9 and the horizontal rail 18 is a male / female engagement structure so that the engagement slider 9 does not come off the horizontal rail 18.

(7) Second engaging member 10
The second engagement member 10 is a telescopic arm, and in the present embodiment, a pair of left and right are disposed at the center of the recumbent via a single core shaft. In other words, the second engagement member 10 has a base end side horizontal arm 10a having a base end portion pivotally attached to the horizontal movable piece 8d of the hinge member 8 and a projection-like connecting portion 23 at an appropriate position on the upper surface. The guide end portion is fitted to the distal end portion of the base end side horizontal arm 10a, and the free end portion is pivotally attached via the support member 25 and the single core shaft 26 fixed to the horizontal center of the opening / closing body 2. The free end side arm 10b is made to extend as the opening / closing body 2 opens as shown in FIG.

  In the example shown in the embodiment of the invention (hereinafter referred to as “this example”), the drive member 36 and the elevating member 37 constituting the power conversion mechanism 6 can be arbitrarily designed and changed.

  Further, in this embodiment, when the opening / closing direction of the opening / closing body is selected, the operation member on one side is arranged so that the first engagement member on one side does not come off from the hinge member and the engagement slider on one side is on one side. On the other hand, the operation member on the other side is positioned so that the first engagement member on the other side is detached from the hinge member and the engagement slider on the other side is positioned on the other side. The term “so that the first engagement member is detached from the hinge member” includes a disengaged state. In addition, the phrase “the state where the second engagement member has been removed” includes a state where it can be removed.

  This is because, when the hinge member on one side exhibits a hinge function, the hinge member on the other side does not need to perform that function. For example, whether or not the first engagement member is in a position away from the hinge member. This is because it is not an essential matter whether or not the first engagement member is located away from the hinge member.

  In short, the operation member on the other side can be moved away from the corresponding hinge member and second engagement member so that the first engagement member and the engagement slider on the other side can be opened. It only has to be positioned.

  In this embodiment, in addition to the specific requirements of the present invention, some new matters can be added to each member such as the first engaging member 7 and the corner member 21, but there is a risk that they will be excluded from examination. Therefore, the drawings and the description in this specification are omitted.

  The present invention is mainly used in the joinery and lock industry.

FIG. 1 to FIG. 10 are explanatory views showing the best embodiments of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic explanatory view showing an environment for carrying out the invention, in which FIG. 1 (a) shows a closed state and FIG. 1 (b) shows a state where the left side is opened. In FIG. 1A, a schematic explanatory view showing a main part (upper side is omitted) of the present invention. FIG. 3A is a schematic explanatory view of a main part (hinge member, first engagement member, etc.), FIG. 3A is a schematic explanatory view from a front view, and FIG. 3B is a schematic explanatory view from a plan view. . FIG. 2 is a schematic explanatory view showing a positional relationship between a receiving groove 12 of a first engaging member 7 on the left side of FIG. 1A and a locking projection 8c of a hinge member 8. FIG. 2 is a schematic explanatory view showing a positional relationship between a receiving groove 12 of a first engagement member 7 on the right side of FIG. 1A and a locking projection 8c of a hinge member 8. It is a schematic explanatory drawing which shows the engagement relationship between the vertical rail of a vertical shaft and the principal part (a 1st engagement member, a raising / lowering member). Exploded view of the power conversion mechanism. Schematic cross-sectional explanatory drawing of the principal part (duct, corner member, etc.) Schematic cross-sectional explanatory drawing of the principal part (a corner member, an engagement slider, a 2nd engagement member, etc.). The schematic explanatory drawing of the state which opened the opening-closing body from the left side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Door frame, 1a ... Top and bottom horizontal frame, 1b ... Left and right vertical frame, 2 ... Opening and closing body, 2b ... Left and right side edge part, 3 ... Opening, 4 ... Operation member, 4a ... Operation part, 4b ... Insertion shaft part DESCRIPTION OF SYMBOLS 5 ... Mounting seat, 6 ... Power conversion mechanism, 7 ... 1st engagement member, 8 ... Hinge member, 9 ... Engagement slider, 9a ... Engagement part, 11 ... Vertical axis, 10 ... 2nd engagement member DESCRIPTION OF SYMBOLS 10a ... Base end side arm, 10b ... Free end side arm, 12 ... Receiving groove, 12a ... Lateral doorway, 12b ... Longitudinal engagement long hole, 14 ... Connecting member, 18 ... Horizontal rail, 19 ... Vertical rail, 20 ... duct, 21 ... corner member, 23 ... connecting part, 26 ... core shaft, 35 ... housing, 36 ... drive member, 37 ... elevating member, 38 ... rack.

Claims (3)

A hinge member on the door frame side, on the other hand, a first engagement member that is disposed on the side end of the opening / closing body so as to move up and down by the operating force of the operating member of the opening / closing body and engages with the hinge member, A corner member disposed at a corner of the opening / closing body so as to be interlocked with one engaging member, and the length of the vertical portion and the horizontal portion being displaced in accordance with the vertical movement of the first engaging member, the corner member And an engaging slider disposed on the side of the opening / closing body so as to be able to move horizontally, a connecting portion that engages / disengages with an engaged portion of the engaging slider, and provided on the hinge member When the opening / closing direction of the opening / closing body is selected, the operation member on one side is arranged so that the first engagement member on one side does not come off the hinge member and the engagement slider on one side is It is positioned at the same time so as not to come out of the second engaging member on one side, On the other hand, the operation member on the other side can separate the first engagement member and the engagement slider on the other side from the corresponding hinge member and second engagement member so that the opening / closing body can be opened. It is characterized by being positioned. 2. The second engagement member according to claim 1, wherein the base end portion is pivotally attached to the horizontal movable piece of the hinge member, while the free end portion is a telescopic arm pivotally attached to the horizontal center of the opening / closing body. An opening and closing device for a left and right double opening and closing body in a fitting. 3. The hinge member according to claim 1, wherein the hinge member includes an upper and lower movable piece and a fixed vertical shaft, and the upper movable piece is provided in a vertical direction in a vertical frame, and the plate-like portion. And a plurality of locking projections provided at predetermined intervals in the vertical direction on the plate-like portion. These locking projections are provided on the opening / closing body. The upper and lower receiving grooves of the first engaging member are engaged with each other, and the movable piece is connected to the base end portion of the second engaging member whose free end portion is connected to the opening / closing body. Opening and closing device for left and right double opening and closing body in joinery.

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