Bolt locking device

Abstract

The utility model belongs to the field of anti-theft doors, and particularly relates to a bolt locking device which comprises a fixing plate, a limiting block, an upper bolt assembly and a lower bolt assembly which are installed in a door leaf, a transmission shaft and a transmission disc connected to the transmission shaft are installed on the fixing plate, and teeth which are connected with each other are arranged on the transmission disc and the limiting block respectively. The two ends of the transmission shaft extend to the outer side of the door leaf and are provided with an outer hand wheel and an inner hand wheel respectively, the upper bolt assembly and the lower bolt assembly are located on the upper side and the lower side of the limiting block respectively and connected with the transmission disc, and a transverse bolt assembly connected with the limiting block is installed in the door leaf. When any hand wheel is driven to rotate, the transmission shaft is driven to drive the transmission disc to rotate, the movement of the transmission disc not only can control the upper bolt assembly and the lower bolt assembly, but also can control the transverse bolt assembly, and therefore all bolt control modes of an anti-theft door can be simplified and unified only by linking the anti-theft lock with the transmission disc.

Description

Technical Field

[0001] The utility model belongs to the field of anti-theft doors, and in particular relates to a latch locking device. Background Art

[0002] Ordinary bolts cannot meet the locking requirements of swing doors in museum warehouses, art gallery warehouses, armories, chemical and pharmaceutical laboratories, etc. The original bolts are usually old-fashioned bolts driven by gear boxes, which have complex structures and heavy transmission. Or they are split surface-mounted bolts, which are not beautiful and not anti-theft. They need to be manually operated multiple times when locking or opening, and cannot be linked with anti-theft locks.

[0003] The utility model designs a latch locking device to solve the above problems. Utility Model Content

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A latch locking device comprises a fixed plate, a limit block, an upper latch assembly and a lower latch assembly installed in a door leaf, a transmission shaft and a transmission disc connected to the transmission shaft are installed on the fixed plate, the transmission disc and the limit block are respectively provided with teeth that engage with each other, both ends of the transmission shaft extend to the outside of the door leaf and are respectively provided with an outer hand wheel and an inner hand wheel, the upper latch assembly and the lower latch assembly are respectively located on the upper and lower sides of the limit block and are connected to the transmission disc, and a transverse latch assembly connected to the limit block is installed in the door leaf.

[0006] As a preferred solution, the transverse latch assembly includes a transverse latch connecting rod installed in the door leaf, and a connecting rod and a transverse latch connected to the connecting rod are installed on the transverse latch connecting rod.

[0007] As a preferred solution, two sequential blocks located on the upper and lower sides of the limit block are respectively installed on the horizontal pin connecting rod. The limit block and the sequential block are installed on the door leaf through mounting columns, and a balancing block is connected between the upper sequential block and the limit block.

[0008] As a preferred solution, latch mounting seats and latches located in the latch mounting seats are respectively installed at the upper and lower ends of the door leaf, the upper latch assembly includes an upper latch rod connected to the upper latch, the lower latch assembly includes a lower latch rod connected to the lower latch, the upper latch rod and the lower latch rod are both installed on the door leaf through mounting columns, and the upper latch rod and the lower latch rod are respectively connected to the transmission disc through connecting rods.

[0009] As a preferred solution, a counterweight is installed on the lower latch rod.

[0010] As a preferred solution, the connecting rod is connected to the transmission disc, the upper latch rod and the lower latch rod respectively through a cotter pin.

[0011] As a preferred solution, a compression spring is installed between the fixed plate and the driving disc.

[0012] As a preferred solution, the transmission shaft is key-connected to the transmission disc.

[0013] As a preferred solution, the outer hand wheel and the inner hand wheel are connected to the transmission shaft via set screws respectively.

[0014] Compared with the existing technology, the advantages of the utility model are:

[0015] 1. The transmission disc of the utility model can uniformly control the upper latch assembly, the lower latch assembly and the horizontal latch assembly, and the transmission disc has a simple structure and can realize the function of linkage with the anti-theft lock by conventional technical means. For example, the anti-theft lock limits the rotation of the transmission disc, thereby achieving the purpose of simplifying and unifying the control methods of various latches of the anti-theft door.

[0016] 2. When the hand wheel of the utility model is driven to rotate, the transmission shaft drives the transmission disc to rotate. The transmission disc uses the teeth to drive the limit block. The balance block makes the limit block, the connecting rod, the cross pin, the cross pin connecting rod and the alignment block form a whole, which can move horizontally to the left and right in a unified manner. The alignment block plays a guiding role in the left and right movement of the cross pin, so that the cross pin moves smoothly without getting stuck. The connecting rod serves as a connecting piece between the cross pin and the cross pin connecting rod, providing more activity space for the cross pin, making the cross pin move more easily.

[0017] 3. When the handwheel of the utility model is driven to rotate, the upper latch and upper latch rod, the lower latch, lower latch rod and counterweight block can be controlled to move up and down through the transmission shaft, transmission disc and connecting rod. The latch mounting seat has a guiding and fixing function. The counterweight block balances the overall center of gravity during the movement of the upper latch rod and the lower latch rod, so that the overall equipment can be transmitted in a more stable state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the back side of the utility model.

[0020] Figure 3 This utility model Figure 1 Schematic diagram of AA.

[0021] Figure 4 This utility model Figure 1 Schematic diagram of BB.

[0022] The names of the numbers in the figure are: 1. Latch; 2. Latch mounting seat; 3. Upper latch rod; 4. Connecting rod; 5. Horizontal latch; 6. Horizontal latch connecting rod; 7. Outer handwheel; 8. Connecting rod; 9. Counterweight; 10. Lower latch rod; 11. Positioning block; 12. Balance block; 13. Limit block; 15. Mounting column; 17. Drive shaft; 18. Drive disc; 19. Fixing plate; 20. Set screw; 21. Inner handwheel; 22. Compression spring; 23. Split pin. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments or drawings are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] A latch locking device, such as Figures 1 to 4 As shown, it includes a fixed plate 19 installed in the door leaf, a limit block 13, an upper latch assembly and a lower latch assembly, a transmission shaft 17 and a transmission disc 18 connected to the transmission shaft 17 are installed on the fixed plate 19, and the transmission disc 18 and the limit block 13 are respectively provided with teeth that are connected to each other, and both ends of the transmission shaft 17 extend to the outside of the door leaf and are respectively installed with an outer hand wheel 7 and an inner hand wheel 21, the upper latch assembly and the lower latch assembly are respectively located on the upper and lower sides of the limit block 13 and are connected to the transmission disc 18, a horizontal latch assembly connected to the limit block 13 is installed in the door leaf, and a conventional anti-theft lock is installed on the door leaf, and the anti-theft lock has the function of limiting the rotation of the transmission disc 18.

[0025] The transverse latch assembly includes a transverse latch connecting rod 6 installed in the door leaf, on which a connecting rod 4 and a transverse latch 5 connected to the connecting rod 4 are installed; the transverse latch connecting rod 6 is respectively provided with two sequential blocks 11 located on the upper and lower sides of a limit block 13, the limit block 13 and the sequential blocks 11 are installed on the door leaf through mounting columns 15, and a balancing block 12 is connected between the upper sequential block 11 and the limit block 13.

[0026] By rotating the outer hand wheel 7 or the inner hand wheel 21, the transmission shaft 17 drives the transmission disc 18 to rotate. The transmission disc 18 uses the teeth to transmit the limit block 13. The balance block 12 makes the limit block 13, the connecting rod 4, the cross pin 5, the cross pin connecting rod 6 and the alignment block 11 form a whole, which can move horizontally to the left and right in a unified manner. The alignment block 11 plays a guiding role in the left and right movement of the cross pin 5, so that the cross pin 5 moves smoothly without getting stuck. The connecting rod 4 serves as a connecting piece between the cross pin 5 and the cross pin connecting rod 6, providing more activity space for the cross pin 5, making the cross pin 5 move more easily.

[0027] A latch mounting seat 2 and a latch 1 located in the latch mounting seat 2 are respectively installed at the upper and lower ends of the door leaf. The upper latch assembly includes an upper latch rod 3 connected to the upper latch 1, and the lower latch assembly includes a lower latch rod 10 connected to the lower latch 1. The upper latch rod 3 and the lower latch rod 10 are both installed on the door leaf through a mounting column 15. The upper latch rod 3 and the lower latch rod 10 are respectively connected to the transmission disc 18 through a connecting rod 8, and a counterweight block 9 is installed on the lower latch rod 10.

[0028] A compression spring 22 is installed between the fixed plate 19 and the transmission disc 18 , and the transmission shaft 17 is connected to the transmission disc 18 by key transmission.

[0029] The connecting rod 8 is connected to the transmission disc 18, the upper latch rod 3 and the lower latch rod 10 through the cotter pin 23, and the outer hand wheel 7 and the inner hand wheel 21 are connected to the transmission shaft 17 through the set screw 20.

[0030] The limit block 13 can be used in conjunction with various styles of anti-theft locks to facilitate locking of the entire set of latches. When the handwheel 7 or the inner handwheel 21 is driven to rotate, the upper latch 1 and the upper latch rod 3, the lower latch 1, the lower latch 10 rod and the counterweight 9 can be controlled to move up and down through the transmission shaft 17, the transmission disc 18 and the connecting rod 8. The latch mounting seat 2 has a guiding and fixing function. The counterweight 9 balances the overall center of gravity during the movement of the upper latch rod 3 and the lower latch rod 10, so that the overall equipment can be transmitted in a more stable state.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A latch locking device, characterized in that: The invention comprises a fixed plate (19) installed in a door leaf, a limit block (13), an upper latch assembly and a lower latch assembly, wherein a transmission shaft (17) and a transmission disc (18) connected to the transmission shaft (17) are installed on the fixed plate (19), and teeth that engage with each other are respectively arranged on the transmission disc (18) and the limit block (13), and the two ends of the transmission shaft (17) extend to the outside of the door leaf and are respectively installed with an outer hand wheel (7) and an inner hand wheel (21), the upper latch assembly and the lower latch assembly are respectively located at the upper and lower sides of the limit block (13) and are connected to the transmission disc (18), and a transverse latch assembly connected to the limit block (13) is installed in the door leaf.

2. A latch locking device according to claim 1, characterized in that: The transverse latch assembly comprises a transverse latch connecting rod (6) installed in the door leaf, and a connecting rod (4) and a transverse latch (5) connected to the connecting rod (4) are installed on the transverse latch connecting rod (6).

3. A latch locking device according to claim 2, characterized in that: The horizontal latch connecting rod (6) is respectively provided with two sequential blocks (11) located at the upper and lower sides of the limit block (13); the limit block (13) and the sequential block (11) are installed on the door leaf via a mounting column (15); a balancing block (12) is connected between the upper sequential block (11) and the limit block (13).

4. A latch locking device according to claim 1, characterized in that: A latch mounting seat (2) and a latch (1) located in the latch mounting seat (2) are respectively mounted at the upper and lower ends of the door leaf; the upper latch assembly comprises an upper latch rod (3) connected to the upper latch (1); the lower latch assembly comprises a lower latch rod (10) connected to the lower latch (1); the upper latch rod (3) and the lower latch rod (10) are both mounted on the door leaf via a mounting column (15); the upper latch rod (3) and the lower latch rod (10) are respectively connected to a transmission disc (18) via a connecting rod (8).

5. A latch locking device according to claim 4, characterized in that: A counterweight (9) is mounted on the lower latch rod (10).

6. A latch locking device according to claim 4, characterized in that: The connecting rod (8) is connected to the transmission disc (18), the upper latch rod (3) and the lower latch rod (10) respectively through a cotter pin (23).

7. A latch locking device according to claim 1, characterized in that: A compression spring (22) is installed between the fixing plate (19) and the driving disc (18).

8. A latch locking device according to claim 7, characterized in that: The transmission shaft (17) is connected to the transmission disc (18) via a key transmission.

9. A latch locking device according to claim 1, characterized in that: The outer hand wheel (7) and the inner hand wheel (21) are respectively connected to the transmission shaft (17) via set screws (20).

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