JP4656435B2 - Joinery - Google Patents

Description

  The present invention is a joinery in which a building concrete is mounted on a fitting frame such as a sliding door, a sliding sash, and a one-sided sash so as to be movable on a straight line between an open position and a closed position.

In the sliding door, a shoji is attached to a frame so as to be movable on a straight line between an open position and a closed position.
In the sliding door described above, when the shoji at the open position is moved in the closing direction to the closed position, the vertical fence on the door-to-door side of the shoji collides with the vertical frame of the frame, and the shoji is bounced back by the reaction. .
In addition, the sliding door described above requires a large force to open the shoji when the weight of the shoji is heavy or when the shoji is closed with an airtight material between the shoji and the frame. Sometimes.

Various sliding doors have been proposed that prevent the above-mentioned shoji screen from bouncing off and reduce the opening force of the shoji screen.
For example, as disclosed in Patent Document 1, when a locking device by a handle operation is attached to a doorhold side downside of a shoji, and when the shoji is closed, the shoji is locked in a closed position to prevent rebound, and when opening the shoji There is known a sliding door that unlocks the locking device by operating a lever handle, and can apply a force in the opening direction to the shoji to reduce the opening force of the shoji.

Japanese Patent Laid-Open No. 2005-97866

In the case of the conventional sliding door described above, the locking device by the handle operation includes a sickle and a trigger, and when the shoji is closed, the trigger is pressed against the end face of the vertical frame so that the sickle operates in a locked state. Therefore, a trigger is required to prevent the shoji from bouncing back, and the configuration becomes complicated.
This is not limited to sliding doors, and the same is true for joinery that moves on a straight line between an open position and a closed position on a joinery frame such as a sliding sash and a single-draw sash.

  An object of the present invention is to provide a joinery that can prevent the rebound of the building concrete, reduce the opening force of the building concrete, and has a simple configuration.

The present invention is a joinery frame having a vertical frame, and a joinery having a building structure, wherein the building structure has a closed position where the door contact portion is in contact with the vertical frame, and the door contact portion is Attached movably on a straight line across the vertical frame and the open position separated from the vertical frame,
A handle device is attached to the door stop,
A rebound prevention device and an opening assist device are respectively attached across the door stop and the vertical frame,
The handle device includes a handle and first and second actuating brackets that are attached to both ends of the handle in the longitudinal direction and move from the non-actuated position to the actuated position when the handle is opened.
The rebound prevention device includes a locking portion provided at a door stop portion and a receiving portion provided at a vertical frame, and when the building is closed and moved to a closed position, the locking portion is locked to the receiving portion. Holding the building concrete in the closed position, and moving the first operating bracket from the non-operating position toward the operating position so that the locking part is detached from the receiving part and releases the holding of the building concrete;
The opening assist device includes an assisting portion attached to the door stop portion and spaced apart from the locking portion, and a receiving portion attached to the vertical frame spaced apart from the receiving portion of the rebound prevention device. a joinery, wherein a force opening the fittings body by pushing the assist unit receiving portion when the second operating fitting in the state of the closed position is moved to the operating position has to act.

In the present invention, the first and second actuating brackets of the handle device move from the non-actuated position toward the actuated position, so that the assisting part can push the receiving part after the locking part is detached from the receiving part. .
In this way, after the holding at the closed position of the building concrete by the rebound prevention device is released, the building concrete is pushed in the opening direction by the opening assist device, so that the opening force of the building concrete can be assisted reliably, It is possible to prevent damage to the rebound prevention device.

In the present invention, the locking portion of the bounce prevention device has a latch that is movable between the locking position and the disengagement position, and is always held in the locking position, and the receiving portion has a receiving tool,
When the latch is pressed against the receiving member in the locking position, the latch is locked to the locking receiving portion of the receiving member, and the first operating fitting moves from the non-operating position toward the operating position, so that the latch is released. Can be moved to.
In this way, since the latch is securely locked to the lock receiving portion of the receiving member by setting the building concrete to the closed position, it is possible to reliably prevent the building concrete from being rebounded.

In the present invention, the assist part of the opening assist device has a movable member, the receiving part has a receiving tool,
The movable member is movable between a first position closer to the opening side of the building concrete and a second position closer to the closing side, and is movable by moving to the second position when the building concrete is in the closed position. Let the member push the receptacle,
The movable member is always held at the first position, and can be moved to the second position by moving the second operating fitting of the handle device to the operating position.
In this way, by opening the handle of the handle device and moving the operating bracket to the operating position, the movable member moves to the second position and pushes the receiving member. Can be pressed.

According to the present invention, since the building concrete can be held in the closed position by the rebound prevention device, the building concrete rebound can be prevented.
In addition, since the building details at the closed position can be pushed in the opening direction by the opening assist device, opening of the building details can be assisted to reduce the opening force.
In addition, the rebound preventing device has a simple configuration because it is not necessary to provide a mechanism having a complicated shape such as a trigger because the locking portion is locked to the receiving portion by setting the building concrete to the closed position.
Furthermore, since the locking portion of the bounce prevention device is operated by the first operating bracket of the handle device and the assist portion of the opening assist device is operated by the second operating bracket of the handle device, one handle is operated. Thus, the first operating fitting and the second operating fitting are operated, and the rebound prevention device and the opening assist device can be operated reliably.

As shown in FIG. 1, a building concrete 2 is attached to a fitting frame 1 to form a fitting.
The joinery frame 1 has a rectangular shape with an upper frame 10, a lower frame 11, and left and right vertical frames 12.
The building concrete 2 is movable in the left-right direction along the upper frame 10 and the lower frame 11, and the building concrete 2 has a closed position where the door contact portion 2a is in contact with the vertical frame 12, and the door contact portion. 2a moves on a straight line across the open position separated from the vertical frame 12.
The term “the door contact portion 2a is in contact with the vertical frame 12” includes the case where the door contact portion 2a is in contact with the vertical frame 12 with an airtight material interposed therebetween.

The construction concrete 2 shown in FIG. 1 is a shoji type shoji that has an upper gutter 20, a lower gutter 21, one vertical gutter 22 and the other vertical gutter 23 connected in a square shape, and glass, lattices, etc., are attached to the inside. is there. And one vertical rod 22 is the said door stop part 2a.
Moreover, the joinery shown in FIG. 1 has shown the sliding door for the entrance by which the two building concrete 2 (paper shovel) was attached to the joinery frame 1 so that movement to the left-right direction was possible.
The construction concrete 2 is not limited to a shoji, but may be a door, a door, or the like, or is not limited to a cocoon type, and may be a panel type in which the front and back are covered with a panel.
Moreover, as a fitting, a single sliding door, a sliding sash, a single sliding sash, etc. may be sufficient.

A handle device 3 is attached to the door stop 2a of the building concrete 2.
As shown in FIG. 2, the handle device 3 is attached to the front and back of the door stop 2a (that is, both sides in the out-of-plane direction of the building concrete 2). Accordingly, the building concrete 2 can be opened and closed from one side in the out-of-plane direction (for example, outdoor) and the other side in the out-of-plane direction (for example, indoor).

The handle device 3 is for opening and closing the building concrete 2, and includes a rod-shaped handle 3a and an operating fitting, for example, a first operating fitting 3b and a second operating fitting 3c.
The handle 3a is movable between a normal position and an open position, and is always held in the normal position.
The first and second operating brackets 3b and 3c are movable between a non-operating position and an operating position. When the handle 3a is in the normal position, it is in the non-operating position, and when it is in the open position, it moves to the operating position.

A preferred form of the handle device 3 will be described.
The said handle | steering-wheel 3a is attached toward the vertical direction of the door stop part 2a. A first operation fitting 3b is provided near one end in the longitudinal direction of the handle 3a, and a second operation fitting 3c is provided near the other end in the longitudinal direction of the handle 3a.
The handle 3a and the first and second operation fittings 3b and 3c move in the opening and closing direction of the building concrete 2. In this embodiment, it moves while swinging in the opening and closing direction.
The handle 3a is held in the normal position shown in FIG. When the handle 3a is in the normal position, the first and second operating brackets 3e and 3c are in the illustrated non-operating position.
When the handle 3a is held in the normal position and the handle 3a is operated (closed) in the direction to close the building concrete 2 (arrow a direction), the handle 3a does not move relative to the door stop 2a. The construction concrete 2 moves in the closing direction together with the handle 3a.
At this time, the first and second operation fittings 3b and 3c remain in the non-operation position.
When the handle 3a is held in the normal position and the handle 3a is operated (opening operation) in the direction of opening the building concrete 2 (arrow b direction), the handle 3a moves toward the open position with respect to the door stop 2a. Then, the first and second operating metal fittings 3b and 3c move toward the operating position.
To operate the handle 3a in the direction in which the building concrete 2 is opened is to apply a force in an oblique direction (arrow b ') with respect to a direction parallel to the linear movement direction of the building concrete 2. That is, a force is applied so that a rotational moment acts on the handle 3a.
When the handle 3a moves to the open position, the first and second actuating brackets 3b and 3c become the actuated position, and the handle 3a cannot move relative to the door stop 2a. By operating the concrete 2 in the opening direction, the construction concrete 2 moves in the opening direction together with the handle 3a.
When the building concrete 2 is moved in the opening direction, the first and second actuating brackets 3b and 3c remain in the actuated position.
In the above description, to operate the handle 3a in the closing direction means to apply a force in the closing direction of the building concrete 2 to the handle 3a.

  The moving direction of the handle 3a is not limited to the opening / closing direction of the building concrete 2 and may be a direction perpendicular to the opening / closing direction of the building concrete 2 (out-of-plane direction), or the vertical direction of the door stop 2a. Also good.

A rebound prevention device 4 and an opening assist device 5 are provided across the vertical frame 12 and the door stop 2a.
The rebound prevention device 4 includes a locking portion 4a attached to the door stop portion 2a and a receiving portion 4b provided on the vertical frame 12.
Then, when the building concrete 2 is moved to the closing position from the open position (that is, closed), the locking portion 4a is locked to the receiving portion 4b, and the rebound prevention device 4 moves the building concrete 2 to the building concrete 2. Hold it so that it does not move in the opening direction.
This prevents the door stop portion 2a of the building concrete 2 from hitting the vertical frame 12 and bouncing off, thereby making the building concrete 2 a closed position.

As shown in FIG. 2, the locking portion 4 a faces the first operating piece 3 b of the handle device 3, and the first operating piece 3 b moves by a predetermined stroke from the non-operating position to the operating position and is not operating. By setting the intermediate position between the position and the operating position, the locking of the locking portion 4a and the receiving portion 4b is released.
As a result, the handle 3a is moved from the normal position toward the open position so as to be in an intermediate position between the normal position and the open position. 2 can be moved in the opening direction.

The opening assist device 5 includes an assist portion 5 a attached to the door stop portion 2 a and a receiving portion 5 b provided on the vertical frame 12.
As shown in FIG. 2, the assist portion 5 a faces the second operation fitting 3 c of the handle device 3.
And when the building concrete 2 is a closed position, the 2nd operation metal fitting 3c moves from an intermediate position to an operation position, The 2nd operation metal fitting 3c operates the assist part 5a, The assist part 5a becomes the receiving part 5b. Press to apply a force in the opening direction to the building concrete 2 and project the building concrete 2 in the opening direction.
As a result, the opening force of the building concrete 2 can be assisted.

Next, the specific shape of each member will be described.
As shown in FIGS. 3 and 4, the handle device 3 includes the handle 3a, the first and second operation fittings 3b and 3c, a pair of arms 30, a pair of mounting bases 31, a pair of brackets 32, A spring 33 is provided.
The base end portion of the arm 30 is fixedly attached to the handle 3a with screws 30a, and the pair of arms 30 are attached to both ends in the longitudinal direction of the handle 3a. The tip of the arm 30 is provided with upper and lower protrusions 30b and 30b, and a first pin hole 34a and a second pin hole 34b are formed in the upper and lower protrusions 30b and 30b, respectively.
The mounting base 31 has an opening 31a. The opening 31a is opened on the front surface 31b and the back surface 31c of the mounting base 31, respectively, and the tip of the arm 30 is inserted into the opening 31a from the front surface 31b. Is done.
The bracket 32 is substantially U-shaped with an attachment vertical piece 32a and upper and lower horizontal pieces 32b and 32b. A long hole 35 is formed in the attachment vertical piece 32a, and the first and second horizontal pieces 32b and 32b have first holes. Second pin holes 36a and 36b are formed.
The bracket 32 is inserted into the opening 31a of the mounting base 31 from the back surface 31c side, and the mounting vertical piece 32a is fixed by screws 32c, and the arm 30 is interposed between the upper and lower horizontal pieces 32b of the bracket 32. The upper and lower protrusions 30b are inserted.
The first and second actuating brackets 3 b and 3 c are provided between the upper and lower projecting pieces 30 b of the arm 30 and project from the back surface 31 c of the mounting base 31 through the long hole 35 of the bracket 32. The first and second operation fittings 3b and 3c have a first pin hole 37a and a second pin hole 37b.

A first pin 38a is inserted into each of the first pin holes 34a, 36a, 37a, and a second pin 38b is inserted into each of the second pin holes 34b, 36b, 37b.
The first pin hole 36 a of the bracket 32 is a long hole, and the first pin 38 a is movable with respect to the first pin 36 a, and the arm 30 and the first and second operation fittings 3 b and 3 c are connected to the bracket 32. The second pin 30b can be swung around the second pin 30b. The spring 33 can be swung in one direction and held.
As shown in FIG. 2, the mounting base 31 is fixedly attached to one vertical rod 22, and the first and second operation fittings 3 b and 3 c protrude into the hollow portion of the one vertical rod 22.
As a result, the handle 3a is held in the normal position described above, and does not swing in the direction of the arrow a and swings by a predetermined stroke in the direction of the arrow b.

Next, a specific shape of the rebound prevention device 4 will be described. In addition, the door stop part 2a is demonstrated as one vertical gutter 22.
As shown in FIGS. 5 and 6, the locking portion 4 a of the rebound prevention device 4 includes a latch 40. The latch 40 is movable between a locking position where the latch 40 is locked to the receiving portion 4b and a releasing position where the latch 40 is released. The latch 40 is always held at the locking position and is moved to the releasing position by an external force.
The latch 40 has a locking portion 40a and an operating portion 40b. The locking portion 40a can be engaged with and disengaged from the receiving portion 4b, and the operating portion 40b is pushed by the first operating fitting 3b.
For example, the latch 40 is swingably attached to the housing 41 by the pin 42, and the latch 40 is swung in the locking direction by the spring 43 so that the operating portion 40b is in contact with the housing 41 and held in the locking position.
Then, the housing 41 is inserted into the hollow portion 22a of the vertical rod 22 and fixedly attached to the end face plate 22b of the vertical rod 22 using the surface plate 44 and the screw 45.
An operating portion 40b of the latch 40 faces the first operating metal fitting 3b, and a notch 46 is formed in the housing 41. When the first operating fitting 3b moves from the non-operating position toward the operating position, the first operating fitting 3b enters the housing 41, and the first operating fitting 3b pushes the operating portion 40b of the latch 40 so that the latch 40 is directed to the disengaged position. It swings.

A receiving member 47 is fixedly attached to the end face plate 12a of the vertical frame 12 with a surface plate 48 and screws 49, and this receiving member 47 is used as the receiving portion 4b described above.
The receiver 47 includes a mounting portion 47a and a locking receiving portion 47b protruding from the mounting portion 47a.
The attachment portion 47a is attached to the end face plate 12a as described above, and the latch receiving portion 47b is inserted through the opening portion 12b of the end face 12a and the opening portion 48a of the surface plate 48, so It protrudes in the in-plane direction from the contact surface 12c. When the building concrete 2 is in the closed position, the locking receiving portion 47b protrudes into the housing 41 through the opening 44a of the surface plate 44 and the opening 22c of the end face plate 22b.

Next, a specific shape of the opening assist device 5 will be described. In addition, the door stop part 2a is demonstrated as one vertical gutter 22.
As shown in FIGS. 7 and 8, the assist portion 5 a of the opening assist device 5 includes a movable member 50. The movable member 50 is movable in the opening and closing direction of the building concrete 2 over a first position near the opening side of the building concrete 2 and a second position near the closing side, and is always held at the first position.
And the movable member 50 moves toward a 2nd position because the 2nd operation metal fitting 3c moves toward a working position from a non-operation position.
For example, the movable member 50 includes a main body 50a and a housing 50b. The main body 50a is movably supported in the housing 51, and a guide 53 inserted through the guide long groove 52 of the housing 50b is attached to the housing 51, whereby the movable member 50 is placed in the housing 51. It is provided so as to be movable between the first position and the second position.
A coil spring 54 is provided around the housing 50b. The coil spring 54 is in contact with the main body 50a and the guide 53 to hold the movable member 50 in the first position.
The housing 51 is inserted into the hollow portion 22a of the vertical rod 22, and is fixedly attached to the end face plate 22b using a surface plate 55 and screws 56.
The movable member 50 (main body 50a) faces the second operating fitting 3c of the handle device 3 and moves the second operating fitting 3c toward the operating position, so that the second operating fitting 3c is attached to the housing 51. It enters the housing 51 from the formed notch 51a and moves the main body 50a toward the second position.

A receiving member 57 is fixedly attached to the end face plate 12a of the vertical frame 12 using a surface plate 58 and a screw 59, and this receiving member 57 is used as the receiving portion 5b.
The receptacle 57 includes a mounting portion 57a and a contact portion 57b protruding from the mounting portion 57a.
The attachment portion 57a is attached to the end face plate 12a as described above, and the contact portion 57b is inserted through the opening portion 12b of the end face plate 12a and the opening portion 58a of the surface plate 58, so It protrudes in the in-plane direction from the contact surface 12c.
When the building concrete 2 is in the closed position, the contact portion 57b passes through the opening portion 55a of the surface plate 55 and the opening portion 22c of the end face plate 22b and protrudes into the housing 51, and the contact portion 57b (receiving portion 5b). ) And the casing 50b are opposed to each other with a gap of a predetermined size.

The receiving device 57 of the opening assist device 5 is the same as the receiving device 47 of the rebound prevention device 4, and the position in the in-plane direction between the contact portion 57b and the locking receiving portion 47b is shifted. The attaching portion 57a of 57 cannot contact the end face plate 12a of the vertical frame 12.
For this purpose, a spacer 57c is interposed between the mounting portion 57a and the end face plate 12a.

Next, the opening / closing operation of the building concrete 2 will be described.
As shown in FIG. 9A, in the state where the building concrete 2 is opened, the latch 40 and the receiving portion 4b of the locking portion 4a of the rebound prevention device 4 and the movable member 50 and the receiving portion of the assist portion 5a of the opening assist device 5 are shown. 5b is spaced apart in the in-plane direction.
The latch 40 of the locking portion 4a is held at the locking position.
The movable member 50 of the assist portion 5a is held at the first position.
The handle 3a of the handle device 3 is in a normal position, and the first and second operation fittings 3b and 3c are in a non-operation position.

By closing the handle 3a of the handle device 3 in the above-described state, the building concrete 2 moves together with the handle 3a in the closing direction as indicated by the arrow c.
At this time, the first and second operation fittings 3b and 3c of the handle device 3 remain in the inoperative position.
Then, when the building concrete 2 moves to a position close to the closed position, as shown by a virtual line in FIG. 9A, the front end surface 40c of the latching portion 40a of the latch 40 becomes the receiving portion 4b (the latching receiving portion 47b of the receiving tool 47). ). The front end surface 40c of the locking portion 40a is inclined with respect to the horizontal, and the front end surface 40c abuts on the locking receiving portion 47b so that a force that swings the latch 40 toward the disengagement position acts. is there.

Thus, by further moving the building concrete 2 in the closing direction from the above-described state, the latch 40 sequentially swings toward the disengagement position. As shown in FIG. 9B, the locking portion 40a is locked to the locking receiving portion 47b beyond the locking receiving portion 47b.
As a result, the building concrete 2 is held in the closed position and prevented from bouncing back.
At this time, the movable member 50 (the casing 50b) of the opening assist device 50 is separated from the receiving portion 5b (the contact portion 57b of the receiving device 57).

When the handle 3a of the handle device 3 is opened while the building concrete 2 is in the closed position, the first and second actuating brackets 3b and 3c are directed to the actuated position as indicated by an arrow d in FIG. 9B. Move.
As described above, when the first and second operation fittings 3b and 3c move toward the operation position, the latch 40 is swung toward the disengagement position by the first operation fitting 3b, and the movable member 50 is moved to the second position. It is moved toward the second position by the operating metal fitting 3c.
When the first operating fitting 3b is an intermediate position to move toward the only operating position a distance S ₁ as shown in FIG. 10 (a), the locking portion 40a of the latch 40 is separated from the engaging portions 47b The holding of the construction concrete 2 in the closed position is released.

At this time, the second actuating bracket 3c be moved a distance S ₁ becomes an intermediate position, but moves the movable member 50 by a distance S _1, is that the movable member 50 (rod 50b) pushes the contact portion 57b There is no force that pushes the building concrete 2 in the opening direction.
In short, when the locking portion 40a of the latch 40 is locked to the locking receiving portion 47b, the force that pushes the building concrete 2 in the opening direction by the opening assist device 5 does not act.

  When the handle 3a of the handle device 3 is further opened from the above-described state to move the first and second operation fittings 3b and 3c from the intermediate position toward the operation position, the movable member 50 (the housing 50b) of the assist portion 5a. Pushes the abutment portion 57b and pushes the building concrete 2 in the opening direction, and projects the building concrete 2 in the closed position toward the opening position. That is, the opening of the construction concrete 2 is assisted.

The first and second actuating bracket 3b the handle 3a is an open position as shown in FIG. 10 (b), 3c by a distance S ₂ from further movement (non-operating position from the position shown in FIG. 10 (a) movement ) To the operating position.
As a result, the building concrete 2 is pushed from the closed position shown in FIG. 10A to the position shown in FIG. 10B by a distance S ₃ (S ₂ −S ₁ ).
In other words, force directed in the opening direction of the handle 3a to fittings body 2 in an open assist device 5 described above when operated to open from the middle position (distance S ₁ just moved position) to the open position (distance S ₂ only moved position) Therefore, the building concrete 2 is projected in the opening direction.

At this time, since also the first working bracket 3b distance _S 2 -S ₁ only further moved, the latch 40 is shown in FIG. 10 (b) further swings in the separating direction than disengaged position shown in FIG. 10 (a) Thus, it is in a position far from the latch receiving portion 47b.

  When the handle 3a of the handle device 3 moves to the open position, the handle 3a does not move any further, so that the construction concrete 2 can be moved toward the open position by further opening the handle 3a.

Further, in the handle device 3 described above, since the moving direction from the normal position of the handle 3a toward the opening position is the same as the direction of moving the building concrete 2 toward the opening position, by continuing to open the handle 3a, First, the latch 40 is disengaged, and then is squeezed out by the movable member 50, and then the building concrete 2 moves in the opening direction.
Therefore, by opening the handle 3a, the building concrete 2 can be opened smoothly with a small operating force.

It is a front view of the joinery which shows embodiment of this invention. It is AA sectional drawing of FIG. It is a cross-sectional view of the handle device. It is a disassembled perspective view of a handle apparatus. It is a longitudinal cross-sectional view of the attachment state of a rebound prevention device. It is a cross-sectional view of a rebound prevention device. It is a longitudinal cross-sectional view of the attachment state of an opening assistance apparatus. It is a cross-sectional view of an opening assist device. It is an explanatory diagram of the closing operation of Kenji. It is an opening operation explanatory drawing of Ken-in.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Joinery frame, 2 ... Construction concrete, 2a ... Door stop part, 3 ... Handle apparatus, 3a ... Handle, 3b ... 1st operation metal fitting, 3c ... 2nd operation metal fitting, 4 ... Bounce prevention device, 4a ... Locking part 4b ... receiving portion, 5 ... opening assist device, 5a ... assisting portion, 5b ... receiving portion, 40 ... latch, 47 ... receiving member, 50 ... movable member, 57 ... receiving member, 60 ... housing, 70 ... receiving member.

Claims (4)

A joinery frame having a vertical frame, and a joinery having a construction concrete, wherein the construction concrete has a closed position where the door contact portion is in contact with the vertical frame and the door contact portion is separated from the vertical frame. Attached movably on a straight line over the opened position,
A handle device is attached to the door stop,
A rebound prevention device and an opening assist device are respectively attached across the door stop and the vertical frame,
The handle device includes a handle and first and second actuating brackets that are attached to both ends of the handle in the longitudinal direction and move from the non-actuated position to the actuated position when the handle is opened.
The rebound prevention device includes a locking portion provided at a door stop portion and a receiving portion provided at a vertical frame, and when the building is closed and moved to a closed position, the locking portion is locked to the receiving portion. Holding the building concrete in the closed position, and moving the first operating bracket from the non-operating position toward the operating position so that the locking part is detached from the receiving part and releases the holding of the building concrete;
The opening assist device includes an assisting portion attached to the door stop portion and spaced apart from the locking portion, and a receiving portion attached to the vertical frame and spaced apart from the receiving portion of the rebound prevention device. When the second operating metal fitting moves to the operating position in a state where is closed, the assisting part pushes the receiving part so that a force in the opening direction is applied specifically to the building. 2. The assist portion is configured to push the receiving portion after the locking portion is detached from the receiving portion by moving the first and second operating fittings of the handle device from the non-operating position toward the operating position. Joinery. The locking part of the rebound prevention device is movable between the locking position and the disengagement position, has a latch that is always held in the locking position, and the receiving part has a receiving tool,
When the latch is pressed against the receiving member in the locking position, the latch is locked to the locking receiving portion of the receiving member, and the first operating fitting moves from the non-operating position toward the operating position, so that the latch is released. The joinery according to claim 1 or 2, wherein the joinery is moved to the position. The assist part of the opening assist device has a movable member, the receiving part has a receiving tool,
The movable member is movable between a first position closer to the opening side of the building concrete and a second position closer to the closing side, and is movable by moving to the second position when the building concrete is in the closed position. Let the member push the receptacle,
The fitting according to claim 1, 2, or 3, wherein the movable member is always held at the first position and is moved to the second position when the second operating fitting of the handle device is moved to the operating position.

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