JP2020176469A - Hinged door lever handle seat - Google Patents

Abstract

To provide a hinged door lever handle seat that enhances the support stability of a lever handle and continuity for the support stability and in which components constituting seats on the inner side and outer side are made in common.SOLUTION: A lever handle seat 1 has an inner seat 2, an outer seat 3, and a connection shaft 4. Each of the inner seat 2 and the outer seat 3 includes a casing 5, a bottom cover 6, a torsion spring 7, a center shaft 8. The casing 5 has a cylindrical boss 5c, a spring lock section 5d, and a stopper 5e. The bottom cover 6 has a cylindrical boss 6a. The center shaft 8 has a main body 8a, a radial protrusion 8b, a shaft section 8c, and a spring receptacle 8d. The torsion spring 7, which returns a lever handle 22, is built in the casing 5. The shaft section 8c is fitted into the cylindrical bosses 5c, 6a, and the center shaft 8 is supported by the casing 5 and the bottom cover 6. A square core for driving a latch bolt is supported by the center shaft 8.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lever handle seat for a hinged door, which enhances the support stability of the lever handle for a hinged door and the effect of sustaining the support stability, and also standardizes the parts constituting the seats on the inner side and the outer side.

The hinged door, which is attached to the door frame via a hinge, keeps the closed state by engaging the latch bolt incorporated in the door with the strike provided on the door frame side.

The latch bolt is pulled into the door by operating the lever handle attached to the door, and by pulling the latch bolt, the engagement with the strike is released and the door can be opened.

The lever handle operated in the direction in which the latch bolt is disengaged from the strike, that is, in the direction in which the door is opened, returns to the original state by the force of the return spring when the operating force is released.

Many return springs are incorporated inside a unitized latch mechanism, but as shown in Patent Documents 1 and 2 below, some locks are incorporated in a handle seat that supports a lever handle.

A lock with a return spring built into the handle seat can use a latch mechanism with a simple structure that is not unitized, and has the advantage of simplifying and downsizing the lock.

The lever handle seat of Patent Document 1 rotates a cam plate between a main body fixed to the door and a seat plate fitted to the main body (which corresponds to the bottom plate of the lever handle seat of the present application described later). The cam plate that supports the lever handle in the direction in which the lever handle returns by a spring supports the lever shaft (square shaft) to which the lever handle is fixed.

Further, the door handle device of Patent Document 2 is provided with a cylindrical support portion on the back surface of the door washer and a cylindrical free fitting portion on the handle lever, and the free fitting portion is inserted into the hole of the support portion. The handle lever is directly supported by the door washer.

Japanese Unexamined Patent Publication No. 2008-101349 JP-A-2010-255207

The door handle device of Patent Document 2 requires a handle lever having a special shape provided with a cylindrical loose fitting portion, and the shape of the door washer is also complicated, which is not preferable.

On the other hand, in the lever handle seat of Patent Document 1, since the cam plate is supported by the main body and the seat plate and the lever shaft is supported by the cam plate, the lever handle is guided by the cylindrical support portion. There is no need to provide a fitting part.

In addition, the large diameter portion of the cam plate that supports the lever shaft is guided by the inner peripheral surface of the recess of the main body, and the small diameter shaft portion of the cam plate is guided by the receiving hole provided in the seat plate. The support stability of the lever handle is also ensured to some extent.

However, in the lever handle seat of Patent Document 1, since the guide of the small diameter shaft portion of the cam plate by the seat plate is performed on the hole surface of the receiving hole formed in the seat plate, the receiving hole of the seat plate due to friction over time is used. Wear of the hole surface and the small diameter shaft of the cam plate is unavoidable, and it is difficult to maintain the support stability for a long period of time.

Further, if the small diameter shaft portion of the cam plate is not supported by the receiving hole of the seat plate and the cam plate is guided only by the inner peripheral surface of the concave portion of the main body to avoid the above problem, the inner peripheral surface of the concave portion is used. Since the large-diameter portion of the cam plate is supported only in a part in the circumferential direction, it is considered that the support of the cam plate becomes unstable and the lever shaft tends to swing.

In addition to this, in the lever handle seat of Patent Document 1, since the main bodies on the inner side and the outer side (main bodies attached to the inside and the outside of the door, respectively) have a left-right asymmetrical shape, the main bodies on the inner side and the outer side are formed. There is also a problem that it is not possible to standardize to reduce the number of parts.

The present invention has been made in view of the above-mentioned current technology, and enhances the support stability of the lever handle and the sustaining effect of the support stability, and is common to the parts constituting the seats on the inner side and the outer side. The purpose is to provide a lever handle seat for hinged doors that has also been made into a new one.

In order to solve the above problems, the present invention provides a lever handle seat for a hinged door (hereinafter, also simply referred to as a lever handle seat).
The lever handle seat has an inner seat and an outer seat to be attached to the inside and the outside of the door, and two connecting shafts which are passed through a lock built-in hole of the door to detachably connect the inner seat and the outer seat.
Each of the inner seat and the outer seat has a cup-shaped casing with an open bottom, a bottom cover of the casing attached to the opening of the lock incorporation hole, and a torsion built in the casing to apply a restoring force to the lever handle. It is equipped with a spring and a center shaft that supports the lever handle.
The casing includes a cylindrical boss portion provided at the center of the end wall so as to project toward the inner surface side of the end wall, and two symmetrical spring locking portions provided protruding from the inner surface of the end wall. It has two symmetrically shaped stoppers formed by bulging the inner surface of the outer peripheral wall integrated with the end wall at a position rotated by 180 °.
The bottom cover has a cylindrical boss portion with an inner collar that allows the bottom cover to enter the lock incorporating hole in the center portion.
The center shaft includes a plate-shaped main body, a total of four radial protrusions for regulating the rotation angle that abut the stopper portion, and the main body, which are provided at equal division points in the circumferential direction of the outer periphery of the main body. A cylindrical shaft portion having a star-shaped shaft hole, which is provided at the center of the main body so as to project axially from both end faces of the main body, and a spring receiving portion which is provided so as to protrude axially from one end surface of the main body. Have,
The torsion spring is incorporated into the outer periphery of the cylindrical boss portion of the casing by locking one end to one spring locking portion of the casing and the other end to the spring receiving portion of the center shaft.
The shaft portion of the center shaft is fitted inside the cylindrical boss portion of the casing and the cylindrical boss portion of the bottom cover with sliding gaps, respectively, and the center shaft is supported by the casing and the bottom cover.
A square core for driving a latch bolt rotated by the lever handle is inserted into the shaft hole of the center shaft, and the square core is supported by the center shaft.
Except for the torsion springs of the inner seat and the outer seat, the other components have the same shape and the same specifications.

Preferred forms of the lever handle seat for the hinged door are listed below.
1) Include an outer cover that covers the outside of the casing.
2) The structure is such that the inner seat and the outer seat are connected by detachably fixing the other end of the connecting shaft whose one end is fixed to the bottom cover of the outer seat to the bottom cover of the inner seat with a screw. A through hole for inserting a screwdriver is provided in the end wall of the casing so that the screw can be rotated from the outside.
3) A removable resin bush is interposed between the cylindrical boss portion of the casing and the base portion of the lever handle to be inserted into the hole of the cylindrical boss portion.
4) The star-shaped shaft hole of the center shaft is made into a hole having a corner having a corner angle smaller than the corner angle of the corner of the square core into which the corner of the square core hits and enters.

In the lever handle seat for a hinged door of the present invention, a square core for driving a latch bolt to which a lever handle is fixed is supported by a center shaft, and the center shaft has a cylindrical boss portion and a bottom cover of a casing having shaft portions at both ends. It is supported by being fitted inside the cylindrical boss portion with a sliding gap.

In this way, the center shaft is supported at both ends of the shaft, and the cylindrical bosses of the casing and the bottom cover support both ends of the center shaft over the entire circumference of the shafts at both ends. Excellent and less likely to cause runout of the center axis.

Further, the inner diameter surface of the shaft portion of the center shaft and the cylindrical boss portion of the casing and the bottom cover is less likely to be worn or scratched, and the support stability is maintained for a long period of time.

Further, the casing, the bottom cover, the center shaft, and the outer cover provided as needed have the same specifications and the same shape for the inner and outer parts, and therefore, these parts constituting the inner seat and the outer seat. Will be standardized, and productivity will be improved and costs will be reduced.

The lever handle seat including the outer cover has a good appearance because the casing is covered by the outer cover.

Further, the lever handle seat provided with the through hole for inserting the driver on the end wall of the casing can be connected to the door via the connecting shaft by assembling the inner seat and the outer seat in advance. Easy to install.

Further, the lever handle seat having the resin bush interposed between the cylindrical boss portion of the casing and the base portion of the lever handle replaces the damaged resin bush to stabilize the support of the lever handle due to the damage of the resin bush. It is possible to prevent deterioration of sex.

Further, in the case where the star-shaped shaft hole of the center shaft is shaped so that the corner of the square core hits the point and enters, the shape and dimensions of the shaft hole and the square core are deviated from each other, and the angle with respect to the shaft hole It is easy to handle when the core cannot be inserted. It is possible to insert the square core by scraping a small part where the square core of the hole surface of the shaft hole hits the point.

It is sectional drawing which shows the inner seat of the lever handle seat of this invention in an assembled state. (A) is a perspective view showing the components of the inner seat disassembled and viewed from the direction in which the outer surface of the outer cover appears, and (a) is a perspective view showing the components of the inner seat disassembled and viewed from the direction in which the inner surface of the outer cover appears. It is a perspective view which shows. It is a perspective view of the bottom cover of the outer seat to which the connecting shaft is fixed. It is a bottom view which shows the casing of the inner seat and the outer seat. It is an end view which shows the star-shaped shaft hole formed in the shaft part of the center shaft of the inner seat and the outer seat. It is a bottom view which shows the positional relationship between a center shaft and a casing when the center shaft is in the original position. It is a bottom view which shows the positional relationship between a center shaft and a casing when the center shaft is rotated from the original position to the position subject to rotation regulation. It is an exploded perspective view which shows the positional relationship of the square core which fixed the lever handle, the outer seat, and the lock built-in hole of a door. It is a perspective view which shows the state which attached the lever handle seat which removed the outer cover to a door. It is a perspective view which shows the state which attached the lever handle seat which attached the lever handle and the outer cover to the door. It is a side view which shows the attachment state to the door of a lever handle. It is sectional drawing which follows the AA line of FIG. It is a perspective view which shows the attachment state of the lever handle with respect to a door.

An embodiment of the lever handle seat for a hinged door of the present invention will be described with reference to FIGS. 1 to 13 of the accompanying drawings.

The components of the lever handle seat for the hinged door are shown in FIGS. 1 to 8, and the attached state of the lever handle seat to the door is shown in FIGS. 9 to 13, respectively.

As shown in FIG. 12, the illustrated lever handle seat 1 is passed through an inner seat 2 attached to the inside of the door 20, an outer seat 3 attached to the outside of the door 20, and a lock incorporating hole 21 provided in the door 20. The inner seat 2 and the outer seat 3 are detachably connected to each other by combining two connecting shafts 4.

As shown in FIGS. 1 and 2, the parts constituting each seat include a cup-shaped casing 5 having an open bottom, a bottom cover 6 of the casing 5, a torsion spring 7, a center shaft 8, and a machine screw 9. There are seven resin bushes 10 and an outer cover 11.
The inner seat 2 and the outer seat 3 have the same shape and specifications except for the torsion spring 7. The torsion spring 7 is a pair of a right-handed spring and a left-handed spring.

FIG. 1 shows a state in which the components of the inner seat 2 are assembled. The outer seat 3 has a connecting shaft 4 added to FIG.

The casing 5 is attached to the opening on the inner side and the outer side of the lock incorporating hole 21 shown in FIGS. 8 and 12, respectively. The casing 5 includes an outer peripheral wall 5a, an end wall 5b, a cylindrical boss portion 5c shown in FIGS. 1, 2, and 4, a spring locking portion 5d shown in FIGS. 2B and 4, FIG. 4. It has two stopper portions 5e shown in FIGS. 6 and 7, and two through holes 5f shown in FIGS. 2 and 4, and the bottom portion is open.

The outer peripheral wall 5a has a cylindrical shape, and an end wall 5b is connected to one end of the outer peripheral wall 5a. The cylindrical boss portion 5c is provided at the center of the end wall 5b so as to project toward the inner surface side of the end wall 5b (see FIGS. 1 and 2).

As shown in FIG. 4, two spring locking portions 5d are provided so as to project from the inner surface of the end wall 5b. The two spring locking portions 5d have a symmetrical shape, and there is no difference between right and left.

As shown in FIGS. 2B, 4, 6, and 7, the stopper portion 5e is formed by bulging the inner surface of the outer peripheral wall 5a at a position rotated by 180 °. The stopper portion 5e is also symmetrical (symmetrical with respect to the center line that bisects the end wall 5b). The stopper portion 5e is machined with a screw hole 5g shown in FIG. 2A.

The through hole 5f is a hole for inserting a screwdriver for rotating a screw, and two holes are provided at centrally symmetrical positions. The two through holes 5f are located at positions corresponding to the two connecting shafts 4.

The bottom cover 6 has a cylindrical boss portion 6a at the center thereof (see FIGS. 1 to 3). As shown in FIG. 12, the cylindrical boss portion 6a is attached to the inner side and the outer side of the door 20 so as to enter the lock incorporating hole 21 of the door 20 and sandwich the door 20.

As shown in FIG. 3, one end of the connecting shaft 4 is crimped and fixed to the bottom cover 6 of the outer seat 3. The bottom cover 6 is attached to the door 20 via the connecting shaft 4. The other end of the connecting shaft 4 is detachably fixed to the bottom cover 6 of the inner seat 2.

As shown in FIG. 12, the connecting shaft 4 is passed through the lock incorporating hole 21, and the other end of the connecting shaft 4 is connected to the bottom cover 6 of the inner seat 2 to connect the bottom cover of the inner seat 2 and the outer seat 3. 6 are connected to each other.

The bottom cover 6 has a centrally symmetrical projecting piece 6b (see FIGS. 2 and 3) on the outer periphery thereof, and the projecting piece 6b is provided so as to conform to the free end of the outer peripheral wall 5a of the casing 5. It is fitted into the notch 5h (see FIGS. 2 and 4) to prevent the relative rotation of the casing 5 and the bottom cover 6.

The bottom cover 6 is provided with two shaft mounting holes 6c (see FIG. 2) corresponding to the two connecting shafts 4, and two at positions rotated 90 ° in the circumferential direction from the shaft mounting holes 6c. The seat hole 6d is further provided.

As shown in FIG. 3, one end of the connecting shaft 4 is fixed to the shaft mounting hole 6c of the bottom cover 6 of the outer seat 3. A screw 12 is passed through the shaft mounting hole 6c of the bottom cover 6 of the inner seat 2, and the screw 12 is screwed into the other end of the connecting shaft 4 to connect the inner seat 2 and the outer seat 3 by the connecting shaft 4 (bottom). The connection of the cover 6) is performed.

The seat hole 6d is located at a position corresponding to the stopper portion 5e of the casing 5, and the machine screw 9 is passed through the seat hole 6d, and the machine screw 9 is the screw hole 5g of the stopper portion 5e shown in FIGS. The bottom cover 6 is fixed to the casing 5 by being screwed into.

The torsion spring 7 is fitted onto the cylindrical boss portion 5c of the casing 5 and built into the casing 5, and the torsion spring 7 returns to the lever handle 22 (see FIGS. 8 to 13) via the center shaft 8. Add.

As shown in FIGS. 1 and 2, the center shaft 8 includes a main body 8a, a total of four radial protrusions 8b (see FIG. 2) provided on the outer periphery of the main body 8a, and a cylindrical shaft portion. It has 8c and a spring receiving portion 8d (also see FIG. 2).

The main body 8a has a plate shape, and a total of four radial protrusions 8b are provided at the circumferential equal division points of the outer periphery of the main body 8a.

The radial protrusion 8b regulates the rotation angle α of the center shaft 8 (see FIG. 6, that is, the rotation angle of the lever handle 22), and the center shaft 8 is in the original position (position in FIG. 6). The radial protrusion 8b comes into contact with the stopper portion 5e of the casing 5 at a position rotated by a predetermined angle (position in FIG. 7), and the rotation of the center shaft 8 is restricted.

As shown in FIG. 2B, the spring receiving portion 8d is provided so as to project in the axial direction on one end surface of the main body 8a (the side facing the end wall 5b of the casing 5).

Two springs are locked on the inner surface of the end wall 5b of the casing 5 with one end of the torsion spring 7 bent back to the spring receiving portion 8d and the other end bent back in the direction opposite to the one end of the torsion spring 7. Each of the portions 5d is locked.

As a result, when the lever handle 22 is rotated in the unlocking direction, the torsion spring 7 is wound and the repulsive force of the spring is increased, and the force is transmitted to the lever handle 22 via the center shaft 8. The lever handle 22 returns to its original position.

When the center shaft 8 rotates in the return direction, the radial protrusion 8b comes into contact with the stopper portion 5e of the casing 5, and the return rotation stops at that position (this is the original position).

As shown in FIGS. 1 and 2, the cylindrical shaft portion 8c of the center shaft 8 is located at the center of the main body 8a and projects axially from both end faces of the main body 8a. Further, the shaft portion 8c has a star-shaped shaft hole 8e.

As shown in FIG. 5, the shaft hole 8e has a total of eight corners C at equally divided points in the circumferential direction. The number of corners C is twice the number of corners of the square core 23 for driving the latch bolt (which in the figure is a square cross section) inserted through the shaft hole 8e and supported by the center shaft 8. Lever handles 22 are fixed to both ends of the square core 23.

The resin bush 10 is inserted into the hole of the cylindrical boss portion 5c from the outside of the casing 5 and is interposed between the cylindrical boss portion 5c and the root portion of the lever handle 22 inserted into the hole of the cylindrical boss portion 5c. The cylinder. When the resin bush 10 is damaged, it can be removed from the casing 5 and replaced. As a result, the runout of the square core 23 due to the damage of the resin bush 10 can be suppressed.

The square core 23 is rotated by a predetermined angle by operating the lever handle 22. The rotation activates the drive ring 24 (see FIG. 12) attached to the square core 23, and the strike bolt 25 (see FIG. 13) is driven by the drive ring 24 and fixed to the door frame (not shown). ), And the door 20 can be opened.

The corner angle of each corner C of the shaft hole 8e is smaller than the corner angle of the corner of the square core 23 (the example square core is 90 °), and the corner of the square core 23 hits the corner C of the shaft hole 8e. Get in.

Since it is configured in this way, even when the accuracy of the square core 23 is poor and the square core 23 does not fit into the shaft hole 8e, the shaft hole 8e is formed by scraping the hole surface of a small portion of the shaft hole 8e. It is possible to insert the square core 23 into the.

In the lever handle seat 1 configured in this way, the shaft portion 8c of the center shaft 8 is fitted inside the cylindrical boss portion 5c of the casing 5 and the cylindrical boss portion 6a of the bottom cover 6 with sliding gaps, respectively, and is centered. The shaft 8 is supported by the casing 5 and the bottom cover 6.

The illustrated lever handle seat 1 has an inner seat 2 and the outer seat 3 has a torsion spring 7 and a center shaft 8 incorporated in the casing 5, and the bottom cover 6 is fixed to the casing 5 with a machine screw 9 and assembled in advance. This is attached to the outside and the inside of the door 20.

The resin bush 10 is attached to the casing 5, and the outer seat 3 covered with the outer cover 11 is set in the outer opening of the lock insertion hole 21 of the door 20, and the lever handle 22 on the outer side is attached to the outer seat 3. The square core 23 fixed in advance is inserted.

Then, the square core 23 is passed through the drive ring 24, and then is further passed through the inner seat 2 set in the opening inside the lock incorporating hole 21. Then, the resin bush 10 of the inner seat 2 is fitted to the square core 23 penetrating the casing 5 of the inner seat 2 (this resin bush 10 may be attached to the casing 5 of the inner seat 2 before passing through the square core 23. ).

Next, the bottom cover 6 of the inner seat 2 is fixed to the connecting shaft 4 which is fixed to the bottom cover 6 of the outer seat 3 and inserted into the lock incorporating hole 21 by using a screw 12. The work is performed by inserting a driver into the casing 5 through a through hole 5f provided in the casing 5 of the inner seat 2.

By tightening the screw 12, the inner seat 2 and the outer seat 3 are connected to each other via the connecting shaft 4 and fixed to the door 20. Therefore, the casing 5 of the inner seat 2 is covered with the outer cover 11, and the lever handle 22 on the inner side is fixed to the square core 23 to complete the lock assembly.

In the illustrated lever handle seat 1, the support of the center shaft 8 is formed by fitting both ends of the shaft portion 8c into the cylindrical boss portion 5c of the casing 5 and the cylindrical boss portion 6a of the bottom cover 6.

According to this structure, the shaft portion 8c is guided to the inner diameter surfaces of the cylindrical boss portions 5c and 6a so that no radial movement allowance is generated over the entire circumference. Therefore, the support stability of the center shaft 8 is excellent, and the square core 23 supported by the center shaft 8 is less likely to run out and rattle.

Further, since both ends of the center shaft 8 are supported by the shaft portion 8c in wide contact with the inner diameter surfaces of the cylindrical boss portions 5c and 6a, the inner diameter surfaces of the shaft portions 8c and the cylindrical boss portions 5c and 6a are supported. It is less likely to be worn or scratched, and support stability is maintained for a long period of time.

Further, the parts constituting the inner seat 2 and the outer seat 3 can be standardized, and productivity can be improved and costs can be reduced.

1 Lever handle seat 2 Inner seat 3 Outer seat 4 Connecting shaft 5 Casing 5a Outer wall 5b End wall 5c Cylindrical boss part 5d Spring locking part 5e Stopper part 5f Through hole 5g Screw hole 5h Notch part 6 Bottom cover 6a Cylindrical Boss part 6b Projection piece 6c Shaft mounting hole 6d Seat hole 7 Torsion spring 8 Center shaft 8a Main body 8b Radial protrusion 8c Shaft part 8d Spring receiving part 8e Shaft hole C Corner 9 Machine screw 10 Resin bush 11 Outer cover 12 Screw 20 Door 21 Lock built-in hole 22 Lever handle 23 Square core 24 Drive ring 25 Latch bolt α Center shaft rotation angle

Claims (5)

The inner seat (2) and outer seat (3) attached to the inside and outside of the door (20) and the inner seat (2) and the outer seat (3) can be separated by passing through the lock built-in hole (21) of the door. Has two connecting shafts (4) connected to
Each of the inner seat (2) and the outer seat (3) is attached to the open cup-shaped casing (5) at the bottom and the openings at both ends of the lock incorporating hole (21) of the door (20). A bottom cover (6) of the casing (5), a torsion spring (7) built in the casing (5) to apply a restoring force to the lever handle (22), and a center shaft for supporting the lever handle (22). With (8)
The other components of the inner seat (2) and the outer seat (3) except for the torsion spring (7) have the same shape and specifications.
The casing (5) has a cylindrical boss portion (5c) provided at the center of the end wall (5b) so as to project toward the inner surface side of the end wall (5b), and the casing (5) protrudes to the inner surface of the end wall (5b). Two symmetrical spring locking portions (5d) and two symmetrical spring locking portions (5d) provided on the inner surface of the outer peripheral wall (5a) integrated with the end wall (5b) at a position rotated by 180 °. It has a shaped stopper (5e) and has a shape.
The bottom cover (6) has a cylindrical boss portion (6a) at the center thereof that allows the lock incorporating hole (21) to be inserted.
The center shaft (8) has a plate-shaped main body (8a) and a total of four rotation angles provided by the stopper portions (5e) provided at equal division points in the circumferential direction of the outer circumference of the main body (8a). A cylinder having a radial protrusion (8b) for regulation and a star-shaped shaft hole (8e) provided at the center of the main body (8a) so as to project axially from both end faces of the main body (8a). It has a shaped shaft portion (8c) and a spring receiving portion (8d) provided on one end surface of the main body (8a) so as to project in the axial direction.
The torsion spring (7) has one end locked to one spring locking portion (5d) of the casing (5) and the other end to the spring receiving portion (8d) of the center shaft (8). It is incorporated in the outer periphery of the cylindrical boss portion (5c) of the casing (5).
The shaft portion (8c) of the center shaft (8) has a sliding gap inside the cylindrical boss portion (5c) of the casing (5) and the cylindrical boss portion (6a) of the bottom cover (6), respectively. The center shaft (8) is supported by the casing (5) and the bottom cover (6).
A square core (23) for driving a latch bolt rotated by a lever handle (22) is inserted into the shaft hole (8e) of the center shaft (8), and the square core (23) is the center shaft (8). Lever handle seat for hinged doors supported by. The lever handle seat for a hinged door according to claim 1, which includes an outer cover (11) that covers the outside of the casing (5). A driver whose end wall (5b) of the casing (5) enables an external rotation operation of a screw (12) for fixing the connecting shaft (4) to the bottom cover (6) of the inner seat (2). The lever handle seat for a hinged door according to claim 1 or 2, which is provided with a through hole (5f) for insertion. A removable resin bush (10) interposed between the cylindrical boss portion (5c) of the casing (5) and the root portion of the lever handle (22) to be inserted into the hole of the cylindrical boss portion (5c). ) Is further included in the lever handle seat for a hinged door according to any one of claims 1 to 3. A claim in which the shaft hole (8e) of the center shaft (8) has a corner (C) having a corner angle smaller than the corner angle of the corner of the square core (23) into which the corner of the square core (23) enters. Item 4. The lever handle seat for a hinged door according to any one of Items 1 to 4.

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