JPH11217960A - Slide cover lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide cover lock device capable of making an automatic locking system and also preventing malicious crimes such as damage with a drill by solving such a problem that much time is consumed for a conventional locking of a lock device installed on the door panel of a dispenser. SOLUTION: An opening, a guide rail 5, and a lock storing part 6 are provided in a cover base 1 fixed to a panel D, and a lock 17 having an exposed key hole is provided on the side surface of the lock storing part 6. An eccentric pin is installed on a joint rotated integrally with the rear shaft of a rotor 21 of the lock 17, and an energized latch both 34 is installed in the direction projected from the side surface of the lock storing part 6. An engaging hole 39 in which the eccentric pin is inserted is provided at one end of a connector plate 37, and a shaft 38 inserted into the hole of the latch bolt 34 is installed as the other end. Then a locked part 13 engaged at all closed positions with the latch bolt 34 in a strike 12 provided on the inner surface of a slidable slide cobrt 3 along the guide rail 5 of the cover base 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to locking and unlocking a slide cover which opens and closes the surface of a locking device or the like when it is closed, in order to enhance the theft protection of a locking device or the like provided on a door panel of a vending machine. The present invention relates to a lock device for a slide cover.

[0002]

2. Description of the Related Art A locking device provided on a door panel of a vending machine can be locked and unlocked with a regular key possessed by a manager, and another person can open the door panel without permission and insert the door inside the vending machine. It prevents stealing of stored goods and the like. However, during the nighttime when traffic is interrupted, illegal unlocking using a picking tool, or a malicious theft accident that forcibly opens the door panel by drilling and breaking the locking device with a drill may occur. is there.

[0003] As a countermeasure to prevent such unauthorized unlocking or theft caused by the breakage of the locking device by the drill, the locking device is made to have a structure that is difficult to be picked up, or the locking device is hard to be broken by drilling by incorporating a high hardness material that does not accept blades. Double locking system with a structure or a separate mechanism to regulate the opening of the door panel, a double locking system with a locking device provided on this mechanism, or a double cover with a slide cover on the surface of the locking device and a locking device on this slide cover System (Japanese Unexamined Patent Publication No.
No. 98).

[0004] "Anti-theft cover device" described in the above publication
A base having an opening is attached to a position where the entire surface of the protruding handle mounted on the door panel and the lock device provided on the handle is covered, and a slide cover for opening and closing the opening is slidably provided on the base, and the closing position is provided. Is provided with a lock for locking the slide cover. When the lock is unlocked, the slide cover becomes slidable, and when the slide cover is opened and the door panel locking device is unlocked, the handle protrudes to the front and can be turned, and when the handle is turned in the unlock direction, Can open the door panel.

[0005]

In order to lock by such a double locking method, it is necessary to lock the handle, close the slide cover, and then lock the slide cover. This is troublesome, and many administrators desire an automatic locking method that completes locking while closing the slide cover. Further, since a lock breaker using a drill can break the lock device of the door panel in the same manner as in the related art by breaking the lock of the slide cover, it is desired that the lock of the slide cover be as hard as possible to be broken by the drill. An object of the present invention is to provide a lock device for a slide cover which can be of an automatic locking type and has an effect of preventing a drill from being broken or other malicious crimes.

[0006]

To achieve the above object, the present invention provides a cover base fixed to a panel, comprising an opening for exposing the panel, a sliding surface of a slide cover for opening and closing the opening, In a lock device of a slide cover provided with a lock for locking and unlocking the slide cover having an opening closed, a keyhole of the lock is exposed on a side wall surface of the cover base and is engaged with a rear shaft of the rotor of the lock. An eccentric pin is provided on a joint that rotates in the locking and unlocking directions together with the rear shaft, and a latch bolt protruding from the cover base is provided with:
One end of the connect plate is pivotally connected, an engaging hole for inserting the eccentric pin is provided at the other end of the connect plate, a locked portion is provided on the back surface of the slide cover, and the joint is moved from a locked state to an unlocked angle. When rotated, the latch bolt is configured to be disengaged from a position where the latch bolt is engaged with the locked portion of the slide cover in the closed position.

The latch bolt is biased in a direction protruding from the cover base, and an engaging hole of the connect plate is formed as a long hole that allows the latch bolt to protrude and retract when the joint is at a locking angle. If you do
The slide cover lock can be automatically locked.

The locked portion is a through hole provided in a plate-like strike fixed to the back surface of the slide cover, and the latch bolt has a tip portion which penetrates the through hole when protruding. In the case where an engaging groove for engaging with the strike is provided, when the unlocking is performed by simultaneously applying the slide cover opening force and the vibration, the annular groove is caught by the strike. Can be blocked.

When the latched portion and the latch bolt are two sets, and the latch bolts project in opposite directions, even if vibration is applied to the lock device of the slide cover, two sets of latch bolts are provided. Since the two latch bolts cannot be immersed at the same time, the effect of preventing unauthorized unlocking due to vibration and impact is enhanced.

The cover base is provided with a check plate whose tip is urged in a direction protruding from the cover base, and the slide cover is provided with a slide piece that moves along the slide rail. A locking recess into which the tip of the check plate is engaged is provided on one of the pieces, a locking surface is provided on the cover closed side of the locking recess, and the check plate is guided in the immersion direction on the opposite side of the locking surface. An inclined surface can be provided. In this case, since the cover base is lightly locked at the fully open position, the locking and unlocking operation of the locking device of the door panel and the turning operation of the protruding handle are facilitated.

[0011] It is preferable that a ridge having a height to cover a sliding surface between the cover base and the slide cover is protruded from a side edge portion of the cover base. In this case, it is possible to prevent breakage caused by forcibly inserting a sharp tip of a tool or the like into the sliding surface between the cover base and the slide cover to pry open the slide cover.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a slide cover lock device according to the present invention will be described with reference to the drawings. 1 is a front view of a lock device of a slide cover in a fully closed state, FIG. 2 is a perspective view of FIG.
3 is a longitudinal sectional view of FIG. 1, FIG. 4 is a longitudinal sectional view of a lock device of the slide cover in a fully opened state, FIG. 5 is a view taken in the direction of an arrow Y in FIG. 2, and FIG. FIG. 7 is a front view of the cover base, FIG. 8 is a sectional view taken along line XX of FIG.
Is a sectional view taken along the line Z-Z in FIG. 2, and FIG. 10 is a sectional view of the lock accommodating portion.

The locking device for the slide cover locks and unlocks the slide cover 3 moved to the closed position along the sliding surface 2 of the cover base 1.
As shown in FIG. 6, a rectangular opening 4 is provided at the center, and a guide rail 5 having a U-shaped cross section is fixed on the sliding surfaces 2 on both sides of the opening 4 by screws 5a ( On one side of the cover base 1, a lock accommodating portion 6 protruding from the surface of the cover base 1 is provided (see FIG. 6). The side surface on the end side of the lock housing portion 6 is flush with the side surface on the end side of the cover base 1, and a stopper wall 7 protruding from the surface of the lock housing portion 6 is provided on the end side of the lock housing portion 6. Provided.

The structure of the slide cover 3 is formed by a peripheral wall 3a having an opening on one side and a covering wall 3b connecting the upper end of the peripheral wall 3a, and the entire inner wall of the peripheral wall 3a is bent in a U-shape to form a sectional shape. A sliding piece 8 having an L shape is fixed (see FIGS. 8 and 12), and both sides of the sliding piece 8 are slidably inserted into a gap between the sliding surface 2 of the cover base 1 and the guide rail 5. You. The slide cover 3 moves along the guide rail 5 and comes into contact with the stopper wall 7 at a fully closed position that completely covers the opening 4 and the lock housing 6. In this fully closed position,
A rear end portion (upper portion in FIG. 12) 8a of the sliding piece 8 is engaged with a cover 40 of the cover base 1 described later (see FIG. 3).

A recess 9 located at the center in the width direction of the slide cover 3 is provided at the leading edge of the slide cover 3 in the closing direction.
Is provided, and the stopper wall 7 is provided with a thick portion 7a that complements the concave portion 9 (see FIG. 6). The sliding pieces 8 on both sides
A locking recess 10 is provided near the front end in the closing direction, and an inclined surface 8b that extends outward toward the rear is formed at the rear end of the sliding piece 8 on both sides. The shape of the locking recess 10 is such that a locking surface 10a is formed on the inner surface on the tip side in the closing direction, and an inclined surface 10b is formed on the opposite inner surface (see FIG. 12).

A back plate 11 is fixed to the inner surface of the covering wall 3b of the slide cover 3, and strikes 12 are bent and extended on both sides of the back plate 11. Legs 12 a, 12 fixed to the peripheral wall 3 a of the slide cover 3 at both ends of the strike 12.
b is provided, and the leg 12a on the distal end side in the closing direction is formed with an inclined surface extending outward in the closing direction. A through-hole (locked portion) 13 is provided in the center of the strike 12, and an upright wall 14 for reinforcing the slide cover 3 is provided in the center of the rear edge of the back plate 11 (see FIGS. 12 and 13). .

A recess 15 is formed in the side surface 6a on the end side of the lock accommodation portion 6.
Is provided, and the lock is inserted into the lock insertion hole 16 provided in the recess 15 (see FIGS. 3 and 5). A cylinder lock 17 is used for the lock, and a lock case 20 of the cylinder lock is fixed by a known lock fixing member 19 inserted through a hole 18 provided on the back surface of the cover base 1 (see FIGS. 2 and 3). . The rotor 21 is rotatably inserted into the inner surface of the lock case 20, and the key hole 22 opened on the distal end surface of the rotor 21 is exposed from the recess 15 of the lock housing 6 (see FIG. 5).

Since the cylinder lock (lock) 17 is provided on the side surface 6a of the lock housing 6, the distance L (see FIG. 5) from the surface of the lock housing 6 to the mounting surface to the door panel D is equal to that of the cylinder lock 17. The size is smaller than that provided on the surface of the lock housing 6. Further, even if the cylinder lock 17 is intended to be broken by a drill attached to the portable drilling machine, the drill cannot be hit against the cylinder lock 17 unless the drill is tilted obliquely to the side surface 6a because the door panel D is approaching. Therefore, drilling for breaking the tumbler along the axis of the rotor 21 of the cylinder lock 17 is impossible, and it is difficult to perform picking. In particular, the locking device for the slide cover is
When attached to door panel D with 2 facing down,
Picking becomes difficult because the keyhole 22 faces downward.

The side surface 6b opposite to the side surface 6a of the lock housing 6
(See FIG. 2).
0, see FIG. 15), a joint receiving hole 25 communicating with the lock insertion hole 16 is provided at the bottom of the concave portion 24 provided at the substantially central portion, and the joint 26 is rotated in the joint receiving hole 25 by a predetermined angle. Accommodated as possible. The shape of the rear shaft 21a of the rotor 21 of the cylinder lock 17 is non-circular, and a bottomed hole 27 (see FIG. 11) having the same shape as the rear shaft 21a is provided at the center of rotation of the joint 26. 27 is engaged with the rear shaft 21a.

The joint 26 is provided with a flange 26a on the surface opposite to the hole 27 with a bottom, and the flange 26a is provided with two small holes 28 with a bottom at a position eccentric from the hole 27 with the bottom. The eccentric pin 29 is inserted into the small hole 28, and the small diameter shaft portion 29 a provided at the tip of the eccentric pin 29 is
protruding from the surface of a (see FIGS. 10 and 11). Side 6b
When the cover 30 is covered with the ridge 23 of the
A space for slidably housing a later-described connect plate 37 is formed between the side plate 6 and the side surface 6b.

The opposite side surfaces 6c, 6c of the lock housing portion 6 are provided with bottomed latch bolt insertion holes 31, and the side wall 6b of the lock housing portion 6 is provided with an opening 32 intersecting with the latch bolt insertion hole 31 (see FIG. 2). See FIG. 15). The spring 33 and the latch bolt 34 are inserted into the latch bolt insertion hole 31 (see FIGS. 10 and 11). Therefore, both latch bolts 34 are urged in a direction to protrude from both side surfaces 6c of the lock housing portion 6, and
When the slide cover 3 is closed, the slide cover 3 is engaged with the through hole (locked) 13 of the strike 12. An annular groove 35 is provided around the tip of the latch bolt 34 as an engagement groove, and a hole 36 perpendicular to the axis of the latch bolt 34 is provided at the rear end of the latch bolt 34 (see FIG. 11).

The connecting plate 37 slidable on the side surface 6b of the lock housing portion 6 has a shaft 38 protruding from one end inserted into the hole 36, and an eccentric pin inserted into an engaging hole 39 provided at the other end of the connecting plate 37. The 29 small diameter shaft portion 29a is inserted (see FIG. 11). When the engaging hole 39 is a long hole as in the present embodiment, the locking device of the slide cover can be of an automatic locking type, and when the engaging hole 39 is a normal hole, it can be operated by key operation. Since the lock plate is locked, if the connect plate 37 is prepared in a long hole type or a normal hole type, it can be replaced according to the customer's request.

A cover 40 having a U-shaped cross section is attached to the back surface of the cover base 1 on the opposite side of the lock accommodating portion 6 by screws 48. The cover 40 slides between the front surface of the cover base 1 and the cover 40. A gap into which the rear end portion 8a of the piece 8 engages is formed (see FIGS. 2 and 3). On the back surface of the cover base 1 and in a region covered by the cover 40, a horizontally long check plate housing recess 41 is provided.
Spring receiving recess 4 further deepened in the center of 1
2 are provided, and through holes 43 are provided at both ends of the check plate housing recess 41 so as to penetrate the surface of the cover base 1 (see FIG. 16).

A pair of check plates 44 slidably inserted into the check plate receiving recesses 41 have front end portions 44 a bent in a crank shape and project outward from the surface of the cover base 1 through the through holes 43. Locking recess 1 of slide cover 3 at full open position when projected
0 (see FIG. 14). The tip shape of the tip portion 44a is such that the locking surface 44 abuts on the locking surface 10a of the locking recess 10.
b and the inclined surface 4 which comes into contact with the inclined surface 10 b of the locking recess 10.
4c.

The bent piece 45 formed at the rear end of the check plate 44 is inserted into the spring accommodating recess 42, and the spring 4 is interposed between the bent pieces 45 of the two check plates 44.
6 is inserted. Therefore, both check plates 44
The tip portion 44a is urged in a protruding direction. On both side edges of the surface of the cover base 1, ridges 47 are provided to cover the sliding surfaces of the cover base 1 and the slide cover 3 (see FIG. 8).

The operation of the lock device of the slide cover configured as described above will be described in the order of anti-theft property in the locked state, unlocking, operation of fully opening the cover, and automatic locking of the cover. The cover base 1 attached to the surface of the door panel D of the vending machine is screwed into the screw hole 1a (see FIG. 2) from the rear surface of the door panel D at a position where the protruding handle H of the door panel D can protrude from the opening 4. It is fixed with bolts that fit together. The handle H is retracted to the surface of the handle case H _1, the slide cover 3 fully closed is covering the opening 4 and the handle H (Figure 1, see FIGS. 3 and 6).

The latch bolt 34 protruding from the side surface 6c of the lock accommodating portion 6 engages with the locked portion 13 of the strike 12 provided on the back surface of the slide cover 3 which is fully closed.
The slide cover 3 is locked in a fully closed state (FIG. 17).
(A)). Rear end 8 of sliding piece 8 of slide cover 3
Since a is engaged in the gap between the surface of the cover base 1 and the cover 40 (see FIG. 3), a cutting tool is inserted between the rear end of the cover base 1 and the cover base 1 to remove the slide cover 3. Prevents malicious acts of lifting.

Further, since the sliding piece 8 of the slide cover 3 is engaged between the surface of the cover base 1 and the guide rail 5, a malicious act of lifting the slide cover 3 is prevented. Since the ridges 47 provided on both side edges of the surface of the cover 1 prevent the blade from being inserted into the gap between the cover base 1 and the slide cover 3 (see FIG. 9), a malicious act of inserting the blade from the side surface of the cover base 1 is performed. Is doubly prevented.

As another criminal act, an external force is applied to the slide cover 3 in the fully open direction, and while the external force is a frictional force applied to the latch bolt 34, the cover base 1 is vibrated to apply the external force in the fully open direction. Although there is a way to cause the latch bolts 34 that have been subjected to vibration to immerse against the springs 33, since the two latch bolts 34 project in opposite directions (see FIG. 9), both latch bolts 34 are immersed at the same time. There is no external force directed in the direction. As described above, the provision of the latch bolts 34 projecting in opposite directions is another feature of the present invention.

The strike 1 is provided to the latch bolt 34.
Since the annular groove 35 is provided at a position penetrating the second locked portion 13, even if the latch bolt 34 moves in the immersion direction at the stage of applying vibration, the slide cover 3 is directed to the fully open direction. Due to external force, the annular groove 35 is
Therefore, the latch bolt 34 cannot be moved further in the immersion direction. Therefore, a double safety device is provided even for a malicious act of applying vibration. In this embodiment, the sectional shape of the latch bolt 34 is circular. However, the sectional shape may be rectangular, and a groove for engaging the strike 12 may be provided at the tip of the latch bolt 34.

The authorized key K owned by the administrator is
And the joint 26 rotates in the unlocking direction together with the rotor 21, and the eccentric pin 29 pulls the connect plate 37 in the joint 26 direction. Latch bolt 34 is detached from locked portion 13 of strike 12 (FIG. 1).
7 (B)), the slide cover 3 can be moved in the fully open direction. When the hand is released from the key K, the key K automatically returns to the unlocking angle by the force of the spring 33, and the latch bolt 34 projects.

When the slide cover 3 is moved to the fully open position, the tip 44a of the check plate 44, which is urged in a direction protruding from the side surface of the cover base 1 and pressed against the slide piece 8, is brought into contact with the slide piece 8. The check plate 44 engages with the locking recess 10 and slightly locks the slide cover 3 at the fully open position. The locking force of the check plate 44 has a sufficient force to lock the slide cover 3. However, when the slide cover 3 is manually pushed in the fully closing direction, the check plate 44 is locked.
The inclined surface 44c is immersed along the inclined surface 10b of the locking recess 10, so that the slide cover 3 can be easily closed.

When the slide cover 3 is at the fully open position, the locking device for the handle H is exposed, so that the handle H
It is possible to unlock the (see FIG. 4) projecting handle H when unlocking the handle H from the surface of the handle case H _1, a rotatable operation. When the handle H is turned to the unlocking angle H ′ shown in FIG. 14, the door panel D can be opened, and when the handle H is immersed, the locking device of the door panel is locked.

When the slide cover 3 starts to move to the fully closed position, the check plate 44 is pushed out of the locking recess 10 to release the temporary lock in the fully open position, and when the slide cover 3 approaches the fully closed position, When the protruding latch bolt 34 is pushed into the slope 12 of the leg 12 a of the strike 12, it sinks into the locked part 13, and is engaged with the locked part 13 to be automatically locked.

The reason why the slide cover 3 is automatically locked is as follows.
Since the engagement hole 39 of the connect plate 37 is a long hole, the rotor 21 is kept at the locked angle and the latch bolt 34 is
However, since it is possible to protrude and retract from the position shown by the dashed line to the position shown by the solid line in FIG. In this case, the spring 33 can be omitted.

When the check plate 44 is provided with a projection 44d which can be operated from the opening 4 of the cover base 1 when the slide cover 3 is fully opened (see FIG. 14), the projection 44d
Can be operated to release the tip end 44a of the check plate 44 from the locking recess 10 of the slide cover 3. In this state, the slide cover 3 can be further moved in the opening direction and removed from the cover base 1.

When attaching the removed slide cover 3 to the cover base 1 again, the inclined surface 8c is formed at the end of the slide piece 8 (see FIG. 14) so that the cover base 1 can be attached in the mounting direction. When moved, the distal end portion 44a of the check plate 44 is pushed by the inclined surface 8c and immerses,
When the slide cover 3 is moved to the locking recess 10 while being pressed against the sliding piece 8, the engagement with the locking recess 10 is achieved, and the slide cover 3 returns to the original mounting state. Therefore, only the slide cover 3 can be easily replaced.

[0038]

The lock device for a slide cover according to the present invention is constructed as described above, and has the following effects. (1) Since the keyhole of the lock is provided on the side wall of the cover base,
Since the lock accommodating portion can be made thinner and the keyhole does not open on the surface, there is an effect of preventing breakage of the drill and an effect of making picking difficult. (2) An eccentric pin is provided on a joint that rotates integrally with the rotor of the lock, a latch bolt urged in a direction protruding from the cover base is provided, and an eccentric pin is inserted into one end of the connect plate. Since the locking device is configured by providing the hole and inserting the shaft provided at the other end into the latch bolt, the locking device can be of an automatic locking type when the engaging hole is formed as a long hole.

(3) It is easy to make the latch bolt a pair of latch bolts projecting in the opposite direction, and the anti-theft property against a malicious act of applying vibration can be enhanced.
Further, by providing the latch bolt with an annular groove, the antitheft property can be further enhanced. (4) By providing a check plate on the cover base and providing a locking recess on the slide cover, the slide cover can be temporarily locked at the fully open position. (5) Since the projections are provided on the cover base to cover the slide cover and the sliding surface of the cover base, it is possible to prevent a malicious act of inserting a blade between the cover base and the slide cover.

[Brief description of the drawings]

FIG. 1 is a front view of a lock device for a slide cover in a fully closed state.

FIG. 2 is a perspective view of FIG. 1 as viewed from the back side.

FIG. 3 is a longitudinal sectional view of FIG.

FIG. 4 is a longitudinal sectional view of the lock device of the slide cover in a fully opened state.

FIG. 5 is a view as viewed in the direction of the arrow Y in FIG. 2;

FIG. 6 is a perspective view of a lock device of the slide cover in a half-open state.

FIG. 7 is a front view of a cover base.

FIG. 8 is a sectional view taken along line XX of FIG. 2;

FIG. 9 is a sectional view taken along the line ZZ of FIG. 2;

FIG. 10 is a cross-sectional view of the lock storage section.

FIG. 11 is an exploded perspective view of main components constituting the lock device.

FIG. 12 is a rear view of the slide cover.

FIG. 13 is a perspective view of a main part of a distal end portion of the slide cover.

FIG. 14 is a diagram illustrating a check plate.

15 is a sectional view taken along line WW of FIG. 7 in a state where a cover of a cover plate is removed.

FIG. 16 is a main part rear view of the cover plate in a state where another cover is removed.

FIG. 17 is an explanatory diagram of a locked and unlocked state of the lock device.

[Explanation of symbols]

 D Door panel K Key H Handle 1 Cover base 2 Sliding surface 3 Slide cover 4 Opening 5 Guide rail 6 Lock receiving portion 6a, 6b, 6c Side surface of locking receiving portion 8 Sliding piece 10 Locking recess 12 Strike 13 Locked portion 17 Lock 21 Rotor 22 Keyhole 26 Joint 29 Eccentric Pin 33 Spring 34 Latch Bolt 37 Connect Plate 44 Check Plate 46 Spring 47 Projection

Claims (6)

[Claims] An opening exposing a panel, a sliding surface of a slide cover for opening and closing the opening, and a lock for locking and unlocking the slide cover with the opening closed are provided on a cover base fixed to the panel. In the slide cover locking device provided, the keyhole of the lock is exposed on a side surface of the cover base, and is engaged with a rear shaft of the rotor of the lock, and is locked together with the rear shaft.
An eccentric pin is provided on a joint that rotates in the unlocking direction, one end of a connect plate is pivotally attached to a latch bolt protruding from the cover base, and an engaging hole for inserting the eccentric pin is provided at the other end of the connect plate. Provided, a locked portion is provided on the back surface of the slide cover, and when the joint is rotated from the locked state to the unlocked angle,
The lock device for a slide cover, wherein the latch bolt is disengaged from a position where the latch bolt is engaged with a locked portion of the slide cover in a closed position. 2. The latch bolt is biased in a direction protruding from the cover base, and the engagement hole of the connect plate has a long hole that allows the latch bolt to protrude and retract when the joint is at a locking angle. 2. The lock device for a slide cover according to claim 1, wherein the lock device is formed as follows. 3. The locked portion is a through hole provided in a plate-like strike fixed to the back surface of the slide cover, and the latch bolt penetrates the through hole when protruding. The locking device for a slide cover according to claim 1, wherein an engagement groove that engages with the strike is provided at a distal end portion. 4. The lock for a slide cover according to claim 1, wherein said locked portion and said latch bolt are two sets, and said latch bolts project in opposite directions. apparatus. 5. A cover plate provided on the cover base, the tip of which is biased in a direction protruding from the cover base, and a slide piece that moves along the slide rail is provided on the slide cover. The sliding piece is provided with a locking recess into which the tip of the check plate engages, a locking surface is provided on the cover closed side of the locking recess, and the check plate is inserted in the direction opposite to the locking surface in the immersion direction. 5. The slide cover locking device according to claim 1, wherein an inclined surface for guiding is provided. 6. A ridge having a height which conceals a sliding surface between the cover base and the slide cover is provided on a side edge of the cover base. Or the lock device for a slide cover according to 5.