JPH09279916A - Surface fitting type gremorne lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a lock main body and improve the appearance by making the inner and outer lock units of a gramorne lock into unit parts, surface mounting them on the inner and outer faces of a door, and intensively arranging the components of a main operating mechanism around a prime moving lever. SOLUTION: A pair of inner and outer lock units 2, 3 are oppositely arranged putting a door 1 therebetween. The inside unit 2 is unitized out of a lock main body 8, an inner cover 9, an inner handle 10, and a thumb-turn 11. The outside unit 3 is unitized out of an outer cover 49, a cylinder lock 51, and a handle 50. The inner and outer lock units 2, 3 are interlockingly connected together through a handle shaft 4 and a thumb-turn shaft 5, and fixed to the door 1 through screws 6. For a main operation, upper and lower sliders are operated by a prime moving lever 14, and a dead bolt 17 is slid laterally by vertical movement of the lower slider.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an imposition type Gremon tablet having a lock mechanism mounted on a door surface.

[0002]

2. Description of the Related Art There is a Gremon lock that engages a dead bolt and upper and lower rods simultaneously with a door frame. This type of Gremon lock has a main actuation mechanism that converts the turning motion of the handle shaft into a sliding motion inside the box-shaped case, and operates the dead bolt and the upper and lower sliders at the same time, and the main actuation mechanism. It is equipped with thumb-turns and cylinder locks that lock it so that it cannot be opened, and lock parts such as triggers that prevent the main operating mechanism from switching to a locked state when the door is opened. In most cases, the above case is stored in a set hole that is recessed in the side end surface of the door, fixed with screws, and a handle, cylinder lock, and thumb turn are attached to the interior and exterior surfaces of the door sandwiching the case as a decorative seat plate. It is attached with.

In the above-mentioned main operating mechanism, for example, the upper and lower sliders are simultaneously operated to move in and out by a pinion and a pair of racks which are interlocked with the handle shaft, and the dead bolt is operated to be retracted and operated by a lever which is interlocked with the handle shaft. A main mechanism in which a driving lever having a T-shaped arm is attached to a handle shaft and a dead bolt and upper and lower sliders are simultaneously moved in and out by this lever is also widely used.

[0004]

As described above, the conventional gremone lock adopting the digging type mounting form has a set hole for accommodating the lock body, a rod hole for passing the upper and lower rods, and a handle. It is necessary to form an operation hole for passing the shaft and the thumb turn shaft in the side surface of the door, the front-rear direction, and the vertical direction, which requires a lot of time and labor for processing the door, which increases the construction cost. There is also a disadvantage that it takes a lot of time to assemble the operation parts such as the rod, the handle and the thumb turn.

By imposing the lock body on the door surface, it is possible to omit the processing of the set hole and the rod hole. However, since the lock main body of the dumming type Gremon tablet needs to be embedded within the thickness range of the door panel, the front and rear thickness is relatively small, but the vertical and horizontal dimensions are large. Therefore, when the imposition type mounting form is adopted, there is a problem in appearance because the lock body is noticeably abnormal. The disadvantage that thumb-turns protrude significantly on the outer surface of the lock body is also inevitable.

An object of the present invention is to provide an imposition type glemon tablet which can minimize the hole processing on the door side, can be easily assembled to the door with little labor, and can reduce the overall construction cost. To do. An object of the present invention is to provide an imposition that allows the lock body to be downsized by reducing the vertical dimension and the horizontal dimension while maintaining the same thinness as that of a Gremon tablet that adopts a digging-type mounting form, and which can be used with good appearance. The purpose is to provide a type of Gremon tablets. It is an object of the present invention to provide an imposition type glemmon lock which is a driving lever having two arms of one character and which has a main actuation mechanism capable of simultaneously operating the upper and lower sliders and the dead bolt. . An object of the present invention is to provide an imposition-type gremone tablet which can use most of the lock components in common regardless of right-handed and left-handed and can reduce the manufacturing cost accordingly.

[0007]

The Gremon tablets of the present invention are
It is composed of a pair of inner and outer lock units 2 and 3, which are opposed to each other with the door 1 interposed therebetween. The inner lock unit 2 is composed of a lock body 8 arranged on the inner surface of the door 1, an inner cover 9 covering the outer surface of the lock body 8, an inner handle 10 and a thumb turn 11 mounted on the outer surface of the inner cover 9. Make into parts. The outer lock unit 3 is made into a unit component by an outer cover 49 arranged on the outer surface of the door 1, a cylinder lock 51 mounted on the outer cover 49, and an outer handle 50. The inner and outer lock units 2 and 3 are operably connected by a handle shaft 4 and a thumb turn shaft 5 which traverse the door 1, and fastened and fixed to the door 1 by a plurality of screws 6 screwed from the outer surface of the inner cover 9.

The main operating mechanism of the lock body 8 is the inner handle 10.
Of the lower slider 16 and the upper and lower sliders 15 and 16 which are connected to the respective operating arms 14a and slide up and down by the driving lever 14. It is composed of a dead bolt 17 that slides left and right in conjunction with vertical sliding. The dead bolt 17 is connected to the lower slider 16 via a slide pin 22 fixed to the inner end, and the slide pin 22 is guided and supported by a guide groove 23 provided in the case 12 and the case lid 13 so as to be slidable left and right. There is a cam groove 37 that engages with the slide pin 22 and slides the dead bolt 17 to the left and right.
It is provided in 6.

The thumb turn shaft 5 and the handle shaft 4 are arranged above and below a vertical center axis P passing through the center of the case 12 in the left-right width direction with a dead bolt 17 interposed therebetween. The upper slider 15 is arranged between the projecting and retracting side surfaces of the dead bolt 7 and the trigger 19 in the case 12 and the vertical center axis P so as to intersect with the dead bolt 17 and the trigger 19.
The lower slider 16 is arranged between the other side surface of the case 12 and the vertical center axis P. Mounting part 11 of thumb turn 11
The a is mounted in the case 12 from the outer surface side of the inner cover 9, and is fastened and fixed by a mounting tool 46 arranged on the inner surface of the case 12. The cylinder lock 51 is mounted on the outer cover 49 from the inner surface side, and the mounting portion 64 of the cylinder lock 51 is housed in the door passage 73 that also serves as a through hole of the thumb turn shaft 5. A part of the handle boss 53 attached to the outer cover 49 is housed in the door passage 72 that also serves as a through hole for the handle shaft 4.

[0010]

The door lock unit 2 includes the inner lock unit 2 including the lock main body 8 and the outer lock unit 3 to form a glemmon lock, and these are mounted on the inner and outer surfaces of the door 1. 1 can be limited to only the through holes for the handle shaft 4 and the thumb turn shaft 5 and the screw holes 74 for the screws 6, and the door 1 can be easily assembled. The upper and lower sliders 15 and 16 are simultaneously slid up and down with one driving lever 14, and the dead bolt 17 is slid left and right with the cam groove 37 provided in the lower slider 16 via the slide pin 22. The lock main body 8 can be miniaturized by collectively disposing the components around the driving lever 14.

A thumb turn shaft 5 and a handle shaft 4 are arranged above and below the vertical center axis 1P of the case 12 with a dead bolt 17 interposed therebetween, and the upper slider 1 is provided on one side of the vertical center axis P.
According to the lock main body 8 in which the lower slider 16 is arranged on the other side, a sliding space for the upper and lower sliders 15 and 16 and the dead bolt 17 and an operating space for the driving lever 14 and the thumb turn lever 18 are secured in the case 12. However, the lock body 8 can be made more compact. When the mounting portion 11a of the thumb turn 11 is housed in the case 12 and the mounting portion 64 of the cylinder lock 51 is housed in the door opening 73, the thumb turn 11 and the cylinder lock 51 are prevented from largely protruding inside and outside the door 1 in a use state. It can be resolved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a gremone lock is an inner lock unit 2 arranged on the inner surface side of a door 1, an outer lock unit 3 arranged on the outer surface side of a door 1, and a lower handle shaft for interlockingly connecting them. 4 and an upper thumb-turn shaft 5, and four screws 6 for fastening and fixing both units 2 and 3 to the door 1.

2 and 3, the inner lock unit 2 includes a lock body 8, an inner cover 9 for covering the outer surface of the lock body 8,
It is composed of an inner handle 10 and a thumb turn 11 arranged on the outer surface of the inner cover 9.

The lock body 8 has a rectangular box-shaped case 12 and a case lid 13 that closes the opening of the case 12.
A thumb lever 18 for accommodating a driving lever 14, an upper slider 15 and a lower slider 16, and a main operating mechanism such as a dead bolt 17 in the interior of the housing, and further for preventing a return slide (opening operation) of the upper slider 15 downward. ,
When the door is opened, the case 19 is provided with a trigger 19 that prevents the upper slider 15 from moving upward (locking operation).
Housed inside.

The driving lever 14 and the thumb-turn lever 18 are arranged so that their respective rotation centers are located above and below the vertical center axis P (see FIG. 4) passing through the center of the case 12 in the left-right width direction. The dead bolt 17 is arranged between the 18 parts. The driving lever 14 has a boss that engages with the handle shaft 4, and has a pair of operating arms 14a that project in a letter shape at the position facing the peripheral surface of the boss. The thumb turn lever 18 has a boss that engages with the thumb turn shaft 5, and has a lock arm 18a protruding from one peripheral surface of the boss. As shown in FIG. 2, the driving lever 14 has the front and rear ends of the boss at the case 12 and the case lid 1.
It is pivotally supported at 3. The thumb-turn lever 18 is rotatably pivotally supported by a mounting tool 46 that is fastened to the case 12 at the front and rear of the boss and a bearing seat 20 that is formed to bulge on the case lid 13, and is free to move by a torsion spring 40 (see FIG. 3). It is pressed and held so that it cannot roll.

The dead bolt 17 is formed by stacking and fixing stainless thick plates or thin stainless plates, and the outer end of the dead bolt 17 is guided and supported by an outlet 21 that opens in the case 12, and a slide pin fixed to the other end. The front and rear ends of 22 are guided and supported by guide grooves 23 provided in the case 12 and the case lid 13. As a result, the dead bolt 17 can slide left and right between the locking position shown by the solid line in FIG. 3 and the open position where most of the dead bolt 17 retracts into the case 1 as shown in FIG.

The upper slider 15 is arranged on the left side of the case between the side wall of the case 12 on the side of the exit / entrance 21 and the above-described vertical center axis P, and the other side wall of the case 12 and the vertical center axis. Lower slider 16 on the lower right half of the case between P and
Place.

The upper slider 15 is composed of a gantry-shaped frame in a side view, and the lower portions of the front and rear frame walls are connected to the left operating arm 14a of the driving lever 14 via pins 24. The lower slider 16 is composed of a frame body having an inverted gate shape in a side view, and the upper and lower intermediate portions of the front and rear frame walls are connected to the right operation arm 14a of the driving lever 14 via the pin 25. Both sliders 15-1
The pin holes 26 and 27 of 6 are formed as long holes in the left-right direction, respectively, and absorb the lateral movement component when the pins 24 and 25 rotate. As a result, both sliders 15 and 16 can be interlocked with the rotation of the driving lever 14 and simultaneously slide upside down between the states of FIGS. 3 and 4.

In order to prevent rattling when sliding up and down,
The front and rear frame walls of both sliders 15 and 16 are guided by ribs 29 cut and raised on the inner surface of the side wall of the case 12 and the inner surfaces of the case 12 and the case lid 13. Further, the pins 30 inserted through the front and rear frame walls are attached to the case 12 and the case lid 1.
The slide guide is provided in the guide groove 31 provided in 3. A torsion spring 32 is bridged between the pin 30 on the upper slider 15 side and a spring hanging shaft provided in the case 12, so that the upper slider 15 can be held in the open position and the locked position, respectively. The rod 33 is screwed and connected to the upper end wall of the upper slider 15 and the lower end wall of the lower slider 16, respectively. The axial centers of these rods 33 are also located on the above vertical center axis P.

On the upper portion between the front and rear frame walls of the upper slider 15, a lock piece 35 received and engaged by the lock arm 18a of the thumb turn lever 18 and a spacer / reinforcing plate laminated before and after the lock piece 35 are pinned. Secure by crimping. Engagement recesses 36 that engage with the lock plates 19b of the trigger 19 are formed in the front and rear frame walls below the pin holes 26, respectively. A cam groove 37 that engages with the slide pin 22 and slides the dead bolt 17 left and right is provided on the front and rear frame walls of the lower slider 16. The cam groove 37 is composed of a floating portion at the upper end and an operating portion that is inclined downward to the right. When the lower slider 16 moves up and down, the slide pin 22 is reciprocally slid by a component force in the left-right direction of the operating portion.

The trigger 19 comprises a trigger window 38 opened in the side wall of the case 12, a shaft 19a slidably supported by a guide piece 39 folded on the inner surface of the case 12, and a small-diameter shaft portion of the shaft 19a. Lock plate 1 fitted
9b and a compression coil type spring 41 interposed between the guide piece 39 and the lock plate 19b. Shaft 19
The a and lock plate 19b are urged toward the outside of the case by a spring 41, and are retained by a retaining ring attached to the inner end of the shaft. An inclined surface is formed at the outer end of the shaft body 19a. When the inclined surface contacts the door frame and receives a contact reaction force, the shaft 19a and the lock plate 19
b moves inward and backward in the case against the spring 41, and the lock plate 19b retracts from the vertical slide locus of the engaging recess 36 as shown by the solid line in FIG. In this state, the upper slider 15 can slide up and down. The front and rear ends of the lock plate 19b are slidably guided and supported by guide grooves 42 provided in the case 12 and the case lid 13.

The inner cover 9 is made of a rectangular box-shaped press-molded product that opens toward the door 1, and fits tightly on the case 12 to completely cover the outer surface of the lock body 8. However, the dead bolt 17, the trigger 19, and the openings for the upper and lower rods 33 are opened at the corresponding portions, and the thumb turn 11 is provided above and below the main surface wall.
And a mounting hole for the inner handle 10 are provided.

The inner handle 10 is made of a die cast product, and the base boss 10a is rotatably supported by a handle seat 44 which is caulked and fixed to the case 12, and a screw ring 45 arranged on the inner surface of the handle seat 44 is attached. By screwing into the screw shaft at the shaft end of the base end boss 10a, it is inseparably integrated with the handle seat 44. One end of the handle shaft 4 composed of a square shaft is internally fitted and connected to the base end boss 10a, and is prevented from coming off with a set screw. As a result, the driving lever 14 is connected to the inner handle 10 via the handle shaft 4, and can be rotated together with the rotating operation of the inner handle 10.

The thumb turn 11 has its mounting portion 11a assembled to the case 12 from the outer surface side of the inner cover 9, and the tubular mounting member 46 provided on the inner surface of the case 12 is screwed into the mounting portion 11a to form the lock main body 8 Be integrated. In this mounted state, the operating shaft inside the mounting portion 11a internally fits and engages with the boss of the thumb turn lever 18, so that the operating lever 11b
Can be transmitted to the thumb turn lever 18.
Since at least the mounting portion 11a of the thumb turn 11 fixed to the case 12 is housed in the case 12, the protruding dimension from the surface of the inner cover 9 can be reduced.

The inner lock unit 2 constructed as described above
After assembling all the lock parts inside and outside the case 12 and the inner cover 9, and further caulking and fixing the cylinder shafts 47 that also function as spacers at the four corners inside the case 12, fit the case lid 13 into the case 12 and A nut 48 (see FIG. 2) is screwed into the shaft end of the cylindrical shaft 47 projecting from 13 to be integrated into one unit component. However, the upper and lower rods 33 are assembled later. The cylindrical shaft 47 also functions as an insertion guide for the screw 6 formed of a long screw.

In FIG. 2, the outer lock unit 3 is a door 1
Has a shallow rectangular dish-shaped outer cover 49 that opens toward
An outer handle 50 and a cylinder lock 5 are provided above and below the outer cover 49.
1 is arranged, and two waterproof caps 52 are attached to the outer surface of the outer cover 49. Four screw bosses 67 are welded to the four corners of the inner surface of the outer cover 49.

The outer handle 50 comprises a handle boss 53 assembled from the outer surface to the outer cover 49, and a handle body 54 removably engageable with the handle boss 53. The handle boss 53 has a boss that is rotatably supported by the outer cover 49 and a connecting portion that projects to the outside of the cover, and the handle shaft 4 is fitted into and engaged with the boss. A rugby ball-shaped connecting hole 55 is formed in the connecting portion. This connection hole 5
A connecting shaft 56 having the same cross-sectional shape as 5 is provided at the base end of the handle body 54.

The waterproof cap 52 includes a ring-shaped cap body 57 and a lid 58 for opening and closing the outer surface of the cap body 57.
Consists of The lower waterproof cap 52 is integrated with the outer cover 49 by screwing a screw 59 inserted from the inner surface side of the outer cover 49 into the cap body 57, and at the same time, handles boss 5
Hold 3 and hold it. A shaft 60 is integrally projectingly provided on the inner surface of the upper portion of the lid 58. By pivotally supporting the shaft 60 with the cap body 57, the lid 58 rotates about the shaft 60,
The opening of the cap body 57 can be opened and closed. The outer surface of the shaft 60 is loaded with a compression spring 61 for imparting friction, which prevents the lid 58 from moving freely and maintains an arbitrary opened state.

The cylinder lock 50 has an outer recessed main body portion 63 and a round shaft-shaped mounting portion 64 projecting from the inner end of the main body portion 63. The main body portion 63 is attached to the outer cover 49 on the inner surface side. It is assembled and fixed with the holder 65. The holder 65 is composed of a frame body bent in a hat shape, and upper and lower mounting seats thereof are fastened and fixed to the outer cover 49 with screws 66. The screw 66 also serves as a mounting screw for the waterproof cap 52 for the cylinder lock 51, and holds the cap body 57 in the holder 65.
Tighten and fix together. By inserting the claw pieces cut and raised in the upper and lower frame portions of the holder 65 into the engagement holes of the mounting portion 64,
The cylinder lock 51 is non-rotatably held and fixed.

The cylinder lock 51 is attached to the thumb turn lever 18
In order to connect with Samturn 11 via
An engaging portion 7 that connects one end of the thumb turn shaft 5 to the end surface of the mounting portion 64 and engages with a connecting hole of the thumb turn lever 18 at the other end.
1 is provided. The engaging portion 71 has a cross-shaped cross section,
By simply inserting and engaging in the hourglass-shaped connection hole provided in the thumb turn lever 18, the connection can be made to be rotatable together.

In order to mount the Gremon lock constructed as described above, the door 1 is provided with a door passage 72 having a diameter capable of accommodating the boss of the handle boss 53, and the cylinder lock 5
A door opening 73 having a diameter dimension capable of accommodating the one mounting portion 64 is provided. Both through holes 72 and 73 also serve as through holes for the handle shaft 4 and thumb turn shaft 5. Further, four screw through holes 74 for passing the screws 6 are provided in parallel with the through holes 72 and 73.

When the Gremon lock is attached to the door 1,
First, the outer lock unit 3 is assembled to the outer surface of the door 1 via the rubber packing 75, and the thumb turn shaft 5 and the cylinder lock 5 are attached.
Each screw boss 67 is inserted into the screw passage 74 while inserting the mounting portion 64 of No. 1 into the door passage 73. Next, the inner lock unit 2 is applied to the inner surface of the door 1 via the packing 75, and the handle shaft 4 is inserted into and engaged with the handle boss 53 via the door passage 72. At the same time thumb turn lever 18
Is inserted into the thumb turn shaft 5 and engaged. While maintaining this state, the screw 6 is inserted through the screw shaft 74 through the cylindrical shaft 47 and screwed into the screw boss 67 of the outer cover 49 to fasten and fix the inner and outer lock units 3. Finally, the upper and lower rods 33 are screwed into the upper and lower sliders 15 and 16 to complete the attachment of the entire lock. The handle body 54 of the outer handle 49 is carried by an operator.

In addition to the above embodiment, the outer handle 50 can be constructed in the same manner as the inner handle 10 and can be integrally attached to the outer cover 49. In this case, the lower waterproof cap 52 can be omitted, and a through hole having a diameter slightly larger than the handle shaft 4 is provided as the door opening 72. A long screw shaft may be fixed to the outer cover 49 instead of the screw boss 67, and a nut may be screwed into the screw shaft to fasten and fix the inner and outer lock units 2 and 3. The thumb turn 11 and the cylinder lock 51 may be omitted depending on the specifications of the Gremon lock, and in that case, the mounting holes of the inner cover 9 and the outer cover 49 are omitted. Depending on the structure of the cylinder lock 51, a through hole for the connecting shaft 70 may be formed instead of the door through hole 73.

The Glemon tablets are selected according to the opening direction of the door 1.
Right hand and left hand are prepared. In this case, case 1
The inner cover 9, the case 12, and the case lid 1 are arranged by arranging the parts with reference to the vertical center axis P at the center of the left and right of 2.
Only 3 need be dedicated to the right and left, and other parts can be shared.

[0035]

According to the present invention, the Glemon lock is composed of the inner and outer lock units 2 and 3 which are unitized respectively, and both units 2 and 3 are mounted on the inner and outer surfaces of the door 1 in an imposition state. In addition to reducing the number of holes drilled on the door 1,
The labor and cost for installing the Gremon tablets can be reduced as a whole by omitting the labor required for installation. The main operating mechanism of the lock main body is a dead lever 17 that slides left and right by using a driving lever 14, upper and lower sliders 15 and 16 operated by the lever 14, and vertical movement of the lower slider 16.
The lock main body 8 can be miniaturized by arranging the components of the main operating mechanism around the driving lever 14 and the appearance in the imposition state can be improved accordingly. The Gremon tablets of the present invention are applied to large and robust doors of unmanned communication relay facilities, soundproof rooms, factories, security facilities and the like.

[Brief description of drawings]

FIG. 1 is a side view showing a relational structure between a Gremon tablet and a door.

FIG. 2 is a vertical sectional side view of a Gremon tablet.

FIG. 3 is a vertical sectional front view of the inner lock unit in a locked state.

FIG. 4 is an internal front view of the inner lock unit in an open state.

[Explanation of symbols]

 1 Door 2 Inner Lock Unit 3 Outer Lock Unit 4 Handle Shaft 5 Thumb Turn Shaft 6 Screw 8 Lock Main Body 9 Inner Cover 10 Inner Handle 11 Thumb Turn 49 Outer Cover 50 Outer Handle 51 Cylinder Lock

Claims (4)

[Claims] 1. A pair of inner and outer lock units 2 and 3 arranged to face each other with a door 1 interposed therebetween. The inner lock unit 2 includes a lock body 8 arranged on an inner surface of the door 1, and a lock body. The inner cover 9 that covers the outer surface of the inner cover 8 and the inner handle 10 and the thumb turn 11 that are mounted on the outer surface of the inner cover 9 are made into a unit component, and the outer lock unit 3 is disposed on the outer surface of the door 1. Cover 49 and cylinder lock 51 attached to the outer cover 49
The outer handle 50 and the outer handle 50 are unitized into a plurality of units. The inner and outer lock units 2 and 3 are connected so as to be interlockable with the handle shaft 4 and the thumb turn shaft 5 that cross the door 1, and are screwed from the outer surface of the inner cover 9. An imposition type Gremon tablet that is fastened and fixed to the door 1 with the screw 6. 2. The main operating mechanism of the lock body 8 is the inner handle 1.
A driving lever 14 provided with two operating arms 14a that rotate together with 0, and a driving lever 14 connected to each operating arm 14a.
It is composed of an upper slider 15 and a lower slider 16 which are slid up and down with, and a dead bolt 17 which slides left and right in conjunction with vertical sliding of the lower slider 16. The dead bolt 17 is a slide pin 22 fixed to an inner end.
Is connected to the lower slider 16 via a slide pin 2
2 is a guide groove 2 provided in the case 12 and the case lid 13.
The lower slider 16 is provided with a cam groove 37, which is slidably guided in the left-right direction by means of No. 3 and which engages with the slide pin 22 to slide the dead bolt 17 in the left-right direction. Gremon tablets. 3. The deadbolt in the case 12 is arranged above and below a vertical center axis P passing through the center of the case 12 in the left-right width direction with a deadbolt 17 sandwiched therebetween. 7 and trigger 19
The upper slider 15
Is arranged so as to intersect with the dead bolt 17 and the trigger 19, and the lower slider 16 is arranged between the other side surface of the case 12 and the vertical center axis P. . 4. The mounting portion 11a of the thumb turn 11 is mounted in the case 12 from the outer surface side of the inner cover 9, and is fastened and fixed by a mounting tool 46 arranged on the inner surface of the case 12, and the cylinder lock 51 is It is attached to the outer cover 49 from the inner surface side, and the mounting portion 64 of the cylinder lock 51 is housed in the door passage 73 that also serves as a through hole of the thumb turn shaft 5, and a part of the handle boss 53 attached to the outer cover 49 is The imposition-type Gremon tablet according to claim 2 or 3, which is housed in a door passage 72 that also serves as a through hole for the handle shaft 4.