JP5307167B2 - Cover plate locking device for wire joint groove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount a locking device on a mounting base frame of a cover plate for a conventional type electric wire common duct. <P>SOLUTION: A movable barrel 30 urged by a spring 28 is accommodated in a guide cylinder 25 provided in one side of a cylinder base frame 14, a lock cylinder 60 is positioned on the outer periphery of a cylinder lock 47 fitted and fastened to the center of the cylinder base frame, a pressing part 41 provided in one end of a movable cover 40 mounted on the top face of the cylinder base frame and the top end of the movable barrel 30 are made to abut on each other, and a side face of the movable barrel and a guide groove 65 of the lock cylinder 60 are connected with each other by means of a guide pin 67. The lock cylinder 60 is moved up and down by opening/closing operation of the movable cover 40 via the movable barrel 30 and the guide pin 67, and the lock cylinder 60 is locked or unlocked by rotating an actuation shaft 51 of the cylinder lock 47 in a clockwise direction or in a counterclockwise direction. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

The present invention relates to a locking device that enhances the safety of a cover plate mounted in an underground underground electric wire common groove in which a lifeline such as an electric wire, a telephone cable, or an optical communication cable is embedded.

Conventionally, underground underground electric wire common grooves where lifelines such as electric wires and telephone cables are embedded have multiple lids that open and close work openings for workers to perform periodic inspections and repair failures. It is attached as possible. And this kind of common ditch exists in a lot of urban roads.

In order to prevent mischief, theft, and destruction of buried electric wires, telephone cables, etc., the cover plate of the common groove is equipped with a cover plate 2 as a safety measure so that the cover plate cannot be opened easily. A locking portion 8 is attached to the lower surface plate 7 attached to the back side (lower surface), and an opening prevention device 70 is attached to the lid plate 2 (FIGS. 3 and 19).

As shown in FIGS. 18 and 19, the opening preventing device 70 includes a lower center portion of a locking collar 71 that matches the fitting hole 5 of the locking step 4 provided on the mounting base frame 3 attached to the cover plate 2. In addition, a cylindrical screw receiving portion 73 having window portions 74 on the left and right sides is provided, and the lower portion of the tightening screw 75 is pivotally supported in a through hole formed in the lower center of the screw receiving portion. The crimp plate 77 having the center screwed to the tightening screw 75 projects in the longitudinal direction at both ends from the window 74, and is recessed into the upper surface of the locking head 76 provided at the upper end of the tightening screw. The crimping plate is mounted so as to be movable up and down by rotating a fastening jig (not shown) engaged with the formed hexagonal hole.

The opening prevention device 70 is attached to the cover plate 2 by inserting the locking hook portion 71 of the opening prevention device so that the longitudinal direction thereof matches the short direction of the fitting hole 5 provided in the attachment base frame 3. Thereafter, the opening prevention device is rotated 90 degrees so that the longitudinal direction of the crimping plate 77 intersects the longitudinal direction of the fitting hole 5 at a right angle, and the engagement step 4 of the mounting base frame 3 and the opening prevention device 70 are engaged. The stop portion 71 is matched. Next, by rotating a tightening jig such as a wrench in alignment with the hexagonal hole provided in the head portion 76 of the tightening screw 75, the pressure plate 77 is raised and crimped to the lower surface of the locking step 4. Then, the opening prevention device 70 is locked and stopped to prevent the fitting hole 5 from opening.

The opening prevention device 70 is simple in structure, low in cost, and economical, but may be opened and closed by simply rotating the tightening screw 75 with a normal tightening jig such as a hexagon wrench. Therefore, the lid attached to the opening of the common groove in which the lifeline is embedded may be easily opened. From the viewpoint of security, it is a safety problem that an illegal person who performs mischief, theft, or vandalism in this lifeline can easily open the lid of the joint groove.

When installing a locking device attached to the opening of the underground underground electric wire joint groove so that the cover plate 2 having the door function cannot be unlocked easily, the structure is inevitably complicated to increase security and large However, there are problems such that the cost is increased due to the increase in cost and the cost is increased, and it is uneconomical, and further, the replacement work to the locking device having an enhanced function is difficult and inefficient.

Therefore, it is possible to prevent mischief, theft, or vandalism by using the attachment base frame 3 for attaching the opening prevention device 70 attached to the conventional lid plate 2 as it is, and unlocking is easy. It is intended to enable a locking device that cannot be installed to be replaced.

In order to solve the above-mentioned problems, the present invention forms a fitting step portion 16 below a saddle plate portion 15 having a lid receiving recess 18 on the upper surface, and a cylinder hole 17 provided at the center of the fitting step portion. A screw-fastening hole 19 is provided on one peripheral edge, a vertical guide cylinder 25 is formed on the other, a vertical groove 26 is provided in the center of the inner wall surface of the guide cylinder, and a movable cylinder 30 urged by a spring 28 is moved up and down. A pressing portion 41 that is movably accommodated and is pivotally supported near the opening of the guide tube 25 is provided at the proximal end of the movable lid 40 that fits in the lid receiving recess 18, and the pressing portion and the The lower end of the operating shaft 51 attached to the cylinder base frame 14 in contact with the upper end of the movable cylinder 30 and the central axis of the main body 48 having the locking collar portion 49 at the upper end is attached to the main body 48. Cylinder lock 47 which protrudes from the bottom surface and has a chamfered portion 52 on the peripheral surface, and the operation at the center of the bottom surface A cylindrical portion 61 having a chamfered shaft hole 62 through which 51 is fitted is positioned on the outer periphery of the cylinder lock 47, and the upper ends of the crimping pieces 63, 64 are placed on the upper peripheral edge of the cylindrical portion 61. The lock cylinder 60 is mounted higher than the end face and has a guide groove 65 formed in the circumferential direction of the wall surface, and one end is inserted into the pin hole 32 provided in the side wall of the movable cylinder 30 housed in the guide cylinder 25 and the other end Is connected to the guide groove 65 of the lock cylinder 60 through the longitudinal groove portion 26 of the guide cylinder 25 and is connected to the guide cylinder 67 to transmit the vertical movement of the movable cylinder 30 to the lock cylinder 60. Then, the operating shaft 51 of the cylinder lock 47 is rotated clockwise or counterclockwise to lock or unlock the lock cylinder 60, and through the guide pin 67 attached to the movable cylinder 30 by the opening and closing movement of the movable lid 40. To move the lock cylinder 60 up and down Characterized by comprising detachably attached to the attachment base frame 3 of the cover plate 2. Further, the cylinder lock 47 has a chamfered portion 52 formed on the peripheral surface by projecting the lower end of the operating shaft 51 located in the central axial direction from the bottom surface of the main body 48, and the surface of the lock cylinder 60 is formed on the chamfered portion. By inserting the shaft hole 62, the lock cylinder 60 is guided by the guide pin 67 in the guide groove 65 and rotated clockwise or counterclockwise along with the rotation of the operating shaft 51 to lock or unlock. The lock key 54 inserted into the operating shaft 51 can be inserted into and removed from the operating shaft 51 when the lock cylinder 60 is in the locked position, and the lock key 54 can be extracted from the operating shaft 51 when the lock cylinder 60 is in the unlocked position. It is characterized by being formed impossible. Further, the movable cylinder 30 accommodated in the guide cylinder 25 of the cylinder base frame 14 is provided at the upper end of the pressure-bonding shaft by inserting the pressure-bonding shaft 35, which is repelled by the small spring 38, into the inner tube portion 33 that opens upward. The engaging hook 36 is slidably brought into contact with a pressing portion 41 provided at one end of the movable lid 40, and the movable cylinder 30 and the crimping shaft 35 are simultaneously moved up and down by opening and closing the movable lid 40. The movable lid 40 is prevented from being loose.

Therefore, when the locking device 13 is attached to the attachment base frame 3 of the conventional wire joint groove cover plate 2, the lock key 54 is inserted into the cylinder lock 47 and the lock cylinder 60 is turned to the unlock position, and then the attachment base is inserted. Next, the lock key 54 is rotated to turn the lock cylinder 60 to the lock position, and then the lock key 54 is pulled out from the cylinder lock 47. When the movable lid 40 attached to the movable cylinder 40 is closed, the movable cylinder 30 in the guide cylinder 25 pressed by the pressing portion 41 of the movable lid rises, and at the same time, a guide pin that connects the movable cylinder and the lock cylinder 60. The lock cylinder 60 is raised together with 67, and the lower surface side of the mounting base frame 3 is pressed by the crimping pieces 63 and 64 at the lock position attached to the lock cylinder, and the locking device 13 is caused by an error in the thickness of the mounting base frame 3. With backlash It can be locked securely be prevented. Further, the locking device 13 can be securely attached to the attachment base frame 3 by one touch only by opening and closing the movable lid 40. Further, since the fixing screw 43 of the movable lid 40 is screwed into the screw hole 19 of the cylinder base frame 14 and the cylinder lock 4 is locked, unauthorized opening can be surely prevented, and the conventional type is secured. Since the cover plate 2 for the common wire groove can be used as a cover plate with security as it is, it is very economical.

It is a perspective view in the state where a plurality of cover plates were attached to the opening of the electric wire joint groove. It is a top view of the locking device attached to the attachment base frame of the cover plate. It is sectional drawing which shows the relationship between the locking device attached to the lower surface board, and the locking device attached to the cover plate. It is a side view of a locking device in the state where a movable lid was opened. It is a bottom view of a locking device. It is an exploded sectional view of a locking device. It is a bottom view of a cylinder base frame. FIG. 8 is a cross-sectional view taken along line AA in FIG. 7. It is a top view of a lock cylinder. It is a bottom view of a lock cylinder. FIG. 10 is a sectional view taken along line BB in FIG. 9. It is sectional drawing of the state which connected the movable cylinder and the lock cylinder with the guide pin. It is a side view of the state which made the locking device which inserted the lock key into the cylinder lock fit in the attachment base frame. It is CC sectional view taken on the line of FIG. It is a side view of the state which rotated the lock key inserted in the cylinder lock. It is a side view which shows the locked state which pulled out the lock key and closed the movable cover. It is the DD sectional view taken on the line of FIG. It is sectional drawing of the conventional opening prevention apparatus. It is sectional drawing of the state which attached the conventional opening prevention apparatus to the attachment base frame.

  FIG. 1 is a perspective view of a state in which a plurality of cover plates are attached to the opening of an electric wire common groove, and FIG. 2 is a plan view of a locking device attached to an attachment base frame of the cover plate. 4 is a side view of the locking device with the movable lid open, FIG. 5 is a bottom view of the locking device, FIG. 6 is an exploded sectional view of the locking device, FIG. 7 is a bottom view of the cylinder base frame, and FIG. FIG. 9 is a plan view of the lock cylinder, FIG. 10 is a bottom view of the lock cylinder, FIG. 11 is a cross-sectional view along the line BB of FIG. 9, and FIG. 12 is a guide for the movable cylinder and the lock cylinder. FIG. 13 is a side view of a state in which a locking device in which a lock key is inserted into a cylinder lock is fitted to a mounting base frame, and FIG. 14 is a cross-sectional view taken along the line CC of FIG. 15 is a side view showing a state in which the lock key inserted into the cylinder lock is rotated, and FIG. 16 is a drawing of the lock key pulled out to close the movable lid. Side view of the state, and FIG. 17 is a sectional view taken along line D-D of Figure 16.

As shown in FIG. 6, the locking device 13 is a movable member that is biased by a spring 28 in a guide tube 25 provided on one side of a cylinder base frame 14 formed of a metal material having corrosion resistance, for example, stainless steel. The cylinder 30 is accommodated so as to be movable up and down. A lock cylinder 60 is positioned on the outer periphery of a cylinder lock 47 fitted and fixed in a cylinder hole 17 provided in the center of the cylinder base frame 14, and a base end of a movable lid 40 pivotally attached to the upper surface of the cylinder base frame. The pressing part 41 provided on the movable cylinder 30 is brought into contact with the movable cylinder 30. Further, the side surface of the movable cylinder 30 and the guide groove 65 of the lock cylinder 60 are connected by a guide pin 67. When the base end of the movable lid 40 is pivoted to a fulcrum, it moves up and down by the pressing force of the pressing portion 41. The lock cylinder 60 is moved up and down via the movable cylinder 30 and the guide pin 67, and the lock cylinder 60 is attached to the operation shaft 51 of the cylinder lock 47 so as to be rotatable clockwise or counterclockwise.

As shown in FIGS. 7 and 8, the cylinder base frame 14 is fitted to the lower surface of the flat flange portion 15 that is locked to the locking step portion 4 provided on the mounting base frame 3 of the cover plate 2. A fitting step 16 to be inserted into the hole 5 is formed integrally. A cylinder hole 17 for fitting and fixing the cylinder lock 47 is provided in the center of the fitting step portion 16, and a lid receiving recess 18 for fitting a movable lid 40 for opening and closing the cylinder hole is formed on the upper surface of the cylinder hole. A guide cylinder 25 having an open upper surface is integrally provided in one side vertical direction of the fitting step portion 16.

As shown in FIGS. 6 and 8, the guide tube 25 is provided with a drain hole 27 in the center of the bottom surface and a longitudinal groove portion 26 through which the guide pin 67 penetrates in the center of the inner wall surface in the vertical direction. A chamfered portion 29 which is a space in which a small crimping piece 64 attached to a lock cylinder 60 which will be described later is formed by cutting out one corner of the wall surface is provided.

Reference numeral 21 denotes a screw hole provided in the fitting step portion 16, and as shown in FIG. 7, the tip penetrates the cylinder hole in a direction perpendicular to the cylinder hole 17, and the cylinder is formed by a screw shaft 21 a screwed into the screw hole. A main body 48 of a cylinder lock 47 detachably fitted in the hole 17 is fixed by pressure to prevent the cylinder lock from rotating and dropping.

As shown in FIG. 7, reference numeral 22 denotes a locking screw hole, which is formed by penetrating vertically in the middle portion of the screw hole 21 and screwed into the locking screw hole. The screwed shaft 21a is prevented from loosening.

Reference numeral 30 denotes a movable cylinder accommodated in the guide cylinder 25 via a spring 28. As shown in FIG. 6, a spring receiving step portion 31 is formed in an annular shape substantially at the center, and the movable cylinder is disposed above the spring receiving step portion. A pin hole 32 is provided in a direction perpendicular to the axial direction. The inner cylinder part 33 provided inside the movable cylinder is provided with a small-diameter drain hole 34 on the bottom surface, and a small spring 38 and a crimping shaft 35 are inserted into the inner cylinder part and provided at the upper end of the crimping shaft. The locking collar portion 36 is accommodated in a slidable contact with the pressing portion 41 of the movable lid 40.

Reference numeral 40 denotes a movable lid attached to the upper surface of the cylinder base frame 14. As shown in FIGS. 6 and 14, a pin hole 44 is provided in the pressing portion 41 provided at the base end, and the pin hole and the pin provided at the upper end of the guide cylinder 25 are provided. The hole 20 is matched and the stop pin 45 is inserted and pivotally supported, and is attached to the lid receiving recess 18 of the cylinder base frame 14 so as to be fitted. The fixing screw 43 loosely fitted in the screw hole 42 provided at the tip of the movable lid 40 is formed so as to be able to be screwed into the lid screw hole 19 of the cylinder base frame 14.

As shown in FIGS. 6 and 14, the pressing portion 41 provided at the base end of the movable lid 40 is movable in a short side 41 a which is the lower end of the pressing portion 41 and the guide cylinder 25 when the movable lid 40 is positioned vertically. The cylinder 30 comes into contact with the crimping shaft 35 and is pushed down against the elastic force of the springs 28 and 38. When the movable lid 40 is pivoted about the retaining pin 45 and fitted into the lid receiving recess 18 of the cylinder base frame 14, the inner long side 41b of the pressing portion 41 and the crimping shaft 35 of the movable cylinder 30 come into contact with each other. The spring 28 and the small spring 38 are provided so as to be raised by the elastic force (FIG. 17).

47 is a cylinder lock, which is detachably fitted into the cylinder hole 17 of the cylinder base frame 14. As shown in FIG. 6, a cylindrical main body 48 and the upper end of the main body are locked to the upper end of the cylinder hole 17. And an operating shaft 51 that is rotated by a lock key 54 in the direction of the central axis of the main body. The operating shaft projects downward from the lower surface of the main body 48 and has a chamfered portion 52 on the peripheral surface. Is provided. This cylinder lock 47 can easily enhance the security effect by replacing it with one having improved safety function.

The lock key 54 to be inserted into the cylinder lock 47 can be inserted into and removed from the operating shaft 51 when the lock cylinder 60 is in the locked state. When the lock cylinder 60 is in the unlocked state, the lock key 54 is inserted into the cylinder lock 47. Therefore, the locking device 13 can be reliably prevented from being forgotten.

As shown in FIG. 6, the lock cylinder 60 is a chamfer that the operation shaft 51 of the cylinder lock 47 is inserted in the center of the lower surface of the cylinder portion 61 fitted to the outer periphery of the main body 48 of the cylinder lock 47 and fixed in the circumferential direction. A shaft hole 62 is provided. A large crimping piece 63 and a small crimping piece 64 that are higher than the upper end surface of the cylinder part are provided at the periphery of the opening of the cylinder part 61, and the lock cylinder 60 is rotated 90 degrees in the circumferential direction on the wall surface of the cylinder part 61. A guide groove 65 is formed.

The chamfered shaft hole 62 is provided with a cutout portion 62a into which a chamfered portion 52 provided on the lower peripheral surface of the operating shaft 51 of the cylinder lock 47 is fitted. So it will not run idle. Along with the rotation of the operating shaft 51, the lock cylinder 60 is circumferentially guided by a guide pin 67 inserted through a guide groove 65 opened at an angle of a quarter of the circumference of the cylinder portion 61 in the circumferential direction, that is, at an angle of 90 degrees. Rotate (clockwise or counterclockwise). Since the other end of the guide pin 67 is inserted and connected to the pin hole 32 of the movable cylinder 30 via the longitudinal groove portion 26 of the guide cylinder 25, the vertical movement of the movable cylinder is locked via the guide pin 67. It is transmitted to the cylinder 60 and moved up and down.

As shown in FIGS. 9 and 10, the crimping pieces 63 and 64 attached to the upper end of the lock cylinder 60 are one extension of the notch 62 a provided in the chamfered shaft hole 62 at the upper end of the cylinder part 61. Located on the top. The other small crimping piece 64 is inclined to the chamfered portion 29 side of the guide tube 25 so as not to come out from the peripheral edge of the fitting step portion 16 at an angle that does not contact the guide tube 25 located on the opposite side. By attaching, the attachment base frame 3 is attached so that it can be crimped | bonded from both sides centering | focusing on the cylinder part 61 of a lock | rock cylinder.

The position where the crimping pieces 63 and 64 attached to the lock cylinder 60 are attached in parallel with the longitudinal direction of the fitting hole 5 of the attachment base frame 3 is the unlock position, and the longitudinal direction of the fitting hole 5 and the lock cylinder A state in which the 60 crimping pieces 63 and 64 are positioned in a perpendicular direction is attached so as to be in the locked position. Therefore, the lock cylinder 60 can be locked or unlocked by rotating and reversing by a quarter of the rotation in the circumferential direction.

The height of the large crimping piece 63 and the small crimping piece 64 attached to the upper end of the lock cylinder 60 is formed higher than the upper end surface of the cylinder part 61. Since the attachment base frame 3 attached to the lid plate 2 is formed by casting, the thickness of the locking step 4 may be different. Therefore, when the upper end of the cylinder part 61 of the lock cylinder 60 and the crimping pieces 63 and 64 are made the same height, when the thickness of the locking step part 4 of the mounting base frame 3 is thin, for example, the movable lid 40 is closed. When the movable body 30 and the lock cylinder 60 are raised, the raised guide pin 67 reaches the upper end of the vertical groove portion 26 and stops, but the upper ends of the crimping pieces 63 and 64 of the lock cylinder 60 are the back surfaces of the locking step portion 4. May not be sufficiently crimped.

Therefore, the upper ends of the crimping pieces 63 and 64 are made higher than the upper end surface of the cylindrical portion 61 in order to ensure that the back surface of the locking step portion 4 is pressure-contacted even if the thickness of the locking step portion 4 of the mounting base frame 3 is different. By forming, the difference by the difference in thickness of the latching step part 4 can be absorbed, and it can be reliably crimped | bonded to the back surface of the latching step part 4, and the backlash of a locking device can be prevented and it can attach reliably.

On the other hand, when the crimping pieces 63 and 64 of the lock cylinder 60 are crimped to the back surface of the locking step portion 4, the guide pin 67 does not reach the upper end of the vertical groove portion 26 due to the difference in thickness of the locking step portion 4. May stop. Then, the movable cylinder 30 to which the other end of the guide pin 67 is connected stops halfway, and the pressing portion 41 of the movable lid 40 and the movable cylinder 30 may not sufficiently contact each other. Then, the pressing portion 41 of the movable lid 40 attached to the cylinder base frame 14 is not sufficiently pressed against the movable cylinder 30, and there is a possibility that the movable lid may become loose or cause a failure. Therefore, by always urging the crimping shaft 35 accommodated in the inner cylinder part 33 of the movable cylinder 30 with the small spring 38, the upper end of the locking collar part 36 is always brought into contact with the pressing part 41, and the mounting base frame 3 The gap generated by the difference in the thickness of the locking step 4 is absorbed to prevent the movable lid 40 from rattling.

Hereinafter, the operation of the embodiment of the present invention will be described. When the locking device 13 is attached to the attachment base frame 3 of the lid plate 2, the movable lid 40 of the locking device 13 is opened in advance and the lock cylinder 60 is lowered, and The lock key 54 inserted into the cylinder lock 47 is inserted into the fitting hole 5 of the mounting base frame 3 in the unlocked position.

As shown in FIGS. 13 and 14, the unlocked locking device 13 has a fitting hole in the mounting base frame 3 because the longitudinal direction of the cylinder base frame 14 and the large and small pressure-bonding pieces 63 and 64 of the lock cylinder 60 are positioned in parallel. 5 can be smoothly inserted without being caught by the hook 5, and the hook portion 15 can be locked to the locking step portion 4 to be easily fitted.

Next, as shown in FIG. 15, when the cylinder lock 47 is rotated by the lock key 54 inserted into the cylinder lock 47, the lock cylinder 60 fitted to the operation shaft 51 located below the cylinder lock is Guided by a guide pin 67 provided projecting in the circumferential direction, it rotates in the guide groove 65 in the circumferential direction to move the crimping pieces 63, 64 to the lock position.

Further, the lock key 54 is removed from the operating shaft 51 of the cylinder lock 47, and the established movable lid 40 is rotated downward to be fitted into the lid receiving recess 18 to close the cylinder hole 17 and attached to the movable lid. The fixing screw 43 is screwed into the lid screw hole 19 (FIG. 16).

When the movable lid 40 is closed, the movable cylinder 30 and the crimping shaft 35 that are pressed by the short side 41 a of the pressing portion 41 of the movable lid slide on the long side 41 b of the pressing portion 41 and are crimped to the movable cylinder 30. The shaft 35 is raised by the elastic force of the springs 28 and 38. At the same time, the lock cylinder 60 rises in conjunction with the guide pin 67, and the upper ends of the crimping pieces 63, 64 are crimped and locked to the lower surface of the locking step 4 of the mounting base frame 3 (FIG. 17).

By closing the movable lid 40, the locking step portion 4 of the mounting base frame 3 is pressure-bonded from the back side with the crimping pieces 63, 64 of the lock cylinder 60, and the locking device 13 loosely fitted to the mounting base frame 3 is attached. The cover plate 2 can be locked at the same time as the base frame 3 is pressure-bonded with one touch to prevent rattling.

As described above, since the locking device 13 can be attached to the mounting base frame 3 provided on the conventional lid plate 2, there is no need to replace it with a new lid plate with a locking device, and the conventional lid plate 2 can be used as it is. Therefore, it is possible to provide a locking device with a security function that is inexpensive and economical.

The locking device 13 is unlocked by loosening the fixing screw 43 of the movable lid 40 with a jig and then rotating and opening the movable lid 40 and simultaneously sliding from the long side 41b of the pressing portion 41 toward the short side 41a. When the crimping shaft 35 and the movable cylinder 30 are pushed downward by moving, the lock cylinder 60 is moved downward by a guide pin 67 connecting the movable cylinder 30 and the lock cylinder 60, and the crimping pieces 63 and 64 are attached to the mounting base frame 3. Move downward away from the back.

When the crimping by the crimping pieces 63 and 64 of the lock cylinder 60 is lost, the locking device 13 in the mounting base frame 3 is rattled. However, since the locking cylinder 60 is in the locked position, the locking device 13 is removed from the mounting base frame 3. I can't pull it out.

Next, when the lock key 54 is inserted into the cylinder lock 47 and the operating shaft 51 is rotated, the lock cylinder 60 is rotated in the circumferential direction, and the crimping pieces 63 and 64 are moved to the unlocked position and unlocked. The device 13 can be removed.

The lock key 54 inserted into the cylinder lock 47 cannot be pulled out from the cylinder shaft 50 when the lock cylinder 60 is in the unlock position. However, it can be pulled out when the lock cylinder 60 is in the locked position. Therefore, there is an advantage that it is possible to reliably prevent forgetting to lock the locking device.

DESCRIPTION OF SYMBOLS 13 Locking device 14 Cylinder base frame 15 Gutter part 16 Fitting step part 17 Cylinder hole 18 Lid receiving recessed part 19 Screw hole 20 Pin hole 25 Guide cylinder 26 Vertical groove part 28 Spring 30 Movable cylinder 31 Spring receiving step part 32 Pin hole 35 Crimping shaft 36 Locking collar part 38 Small spring 40 Movable lid 41 Pressing part 47 Cylinder lock 48 Main body 49 Locking collar part 51 Actuating shaft 54 Lock key 60 Lock cylinder 61 Tube part 63 Large crimping piece 64 Small crimping piece 65 Guide groove 67 Guide pin

Claims (3)

A fitting step portion (16) is formed below the flange portion (15) having a lid receiving recess portion (18) on the upper surface, and a screw is attached to one peripheral edge of a cylinder hole (17) provided at the center of the fitting step portion. A movable hole is provided with a stop hole (19), a vertical guide tube (25) is formed on the other side, a longitudinal groove (26) is provided in the center of the inner wall surface of the guide tube, and is energized by a spring (28). A pressing portion (41) provided at the base end of the movable lid (40) that fits in the lid receiving recess (18) is accommodated in the vicinity of the opening of the guide tube (25). A cylinder base frame (14) that is pivotally supported and in contact with the upper end of the pressing portion and the movable cylinder (30);
The lower end of the operating shaft (51), which is rotatably attached in the central axis direction of the main body (48) having the locking collar (49) at the upper end, protrudes from the bottom surface of the main body (48) and faces the peripheral surface. A cylinder lock (47) provided with a handle (52);
A cylindrical portion (61) having a chamfered shaft hole (62) through which the operating shaft (51) is inserted at the center of the lower surface is positioned on the outer periphery of the cylinder lock (47), and the upper peripheral edge of the cylindrical portion (61) A locking cylinder (60) formed by attaching the upper ends of the crimping pieces (63) and (64) to be higher than the upper end surface of the cylinder part (61) and forming guide groove parts (65) in the circumferential direction of the wall surface;
One end is inserted through a pin hole (32) provided in the side wall of the movable cylinder (30) accommodated in the guide cylinder (25), and the other end is inserted through the longitudinal groove (26) of the guide cylinder (25). ) And a guide pin (67) which is inserted and connected to the guide groove (65) and transmits the vertical movement of the movable cylinder (30) to the lock cylinder (60).
The lock cylinder (60) opens or closes the movable lid (40) by rotating the operating shaft (51) of the cylinder lock (47) clockwise or counterclockwise to lock or unlock the lock cylinder (60). The lock cylinder (60) is moved up and down via a guide pin (67) attached to the movable cylinder (30) by movement, and is detachably attached to the attachment base frame (3) of the lid plate (2). The cover plate locking device for the common wire groove. The cylinder lock (47) has a chamfered portion (52) formed on a peripheral surface by projecting a lower end of an operating shaft (51) positioned in a central axial direction from a bottom surface of the main body (48). By inserting the chamfered shaft hole (62) of the lock cylinder (60) into the lock cylinder (60), the lock cylinder (60) is guided to the guide pin (67) in the guide groove (65) as the operating shaft (51) rotates. The lock key (54) inserted into the operating shaft (51) is locked or unlocked by rotating clockwise or counterclockwise and the operating shaft (51) when the lock cylinder (60) is in the locked position. The wire joint groove according to claim 1, characterized in that the lock key (54) cannot be pulled out from the operating shaft (51) when the lock cylinder (60) is in the unlocked position. Cover plate locking device. The movable cylinder (30) accommodated in the guide cylinder (25) of the cylinder base frame (14) has a pressure-bonding shaft (35) that is elastically springed by a small spring (38) on the inner cylinder part (33) that opens upward. The locking lid (36) provided at the upper end of the crimping shaft is inserted into the pressing portion (41) provided at the base end of the movable lid (40) so as to be slidable, and the movable lid (40 3. The backlash of the movable lid (40) is prevented by simultaneously moving the movable cylinder (30) and the crimping shaft (35) up and down by opening and closing movements. Cover plate locking device for wire joint groove.

Images