JPH0515019Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a door lock in which two or more latch bolts are provided at appropriate locations on a closing body such as a door, so that the lock can be locked and unlocked at two or more locations simultaneously.

(Prior Art) Conventionally, this type of lock has been (a) described in Japanese Utility Model Publication No. 61-27429 filed by the applicant, and (b)
What is described in JP-A-53-111899, (c) Utility Model Application Publication No. 1982-111899
-Things described in Publication No. 160463, (d) Utility Model Application Publication No. 57-80566
There are known devices that can be locked in three places, such as the one described in Japanese Utility Model Publication No. 58-39960 and the one described in (e) Japanese Utility Model Publication No. 58-39960.

The latch hub of a commonly used latch bolt has a pressing protrusion that pushes the rear end of the latch handle by rotating to the left and causes the latch bolt to protrude the maximum amount. The slider has a special structure with an operating protrusion that allows the slider to slide up and down, and a connecting rod is connected to both the upper and lower ends of the slider, and a rack and pinion transmission mechanism is connected to the connecting rod. Two dead bolts are attached indirectly or directly to the latch hub, and while the latch bolt is temporarily locked with only the one latch bolt, by rotating the lever handle that makes the latch bolt appear and retract in the direction of maximum protrusion, the latch bolt is attached to the latch hub. Press the rear end of the latch handle with the pressing protrusion to make it protrude to the maximum extent and enter the fully locked state, and the other two dead bolts are fully locked by the upward movement of the slider and connecting rod to fully lock at three locations. Additionally, the latch bolt and two dead bolts can be unlocked by rotating the lever handle in the unlocking direction.

In (b), (c), and (d), multiple (three) rods are pivotally attached to the rotary plate at positions offset from the rotation center using pins, and the rotary plate is rotated by an operating member. Accordingly, the lock is locked and unlocked by releasably engaging the end engaging portion of the rod with the receiving hole of the other frame, and all locks use the end of the rod.

(E) uses a latch lock in one place, but the upper and lower locks use rods as in (A) to (D) above, and both the upper and lower rods have their proximal ends connected to levers. The lever is connected to the latch, and the spring of this single latch lock causes the upper and lower rods to protrude and lock, while the latch and both the upper and lower rods are moved back by pulling the handle. It is configured to be unlocked by pressing the key.

(Problems to be Solved by the Invention) However, in the conventional example (a), the door is locked at only one location using the latch bolt at the same time as the door is closed, and cannot be locked at three locations. 3
When locking at three locations, the door is locked at three locations only when the door is locked, such as by rotating the lever handle in the locking direction after closing the door, or by operating a key on the cylinder, which is very cumbersome. However, there was a problem that the door could not be automatically locked in three places at the same time as the door was closed.

In addition, when used for large doors, high-pressure chamber doors, vacuum chamber doors, etc., the slider and connecting rod may be heavy and may be damaged due to indoor pressure or wind pressure.
There were problems such as a large amount of force being required to open and close the door and operate the lever handle and key.

Conventional examples (b), (c), and (d) are locked at three locations only when the operating member is rotated in the locking direction after the door is closed, and the locking operation is cumbersome and
It was not possible to automatically lock the door at three locations at the same time as the door was closed.

In addition, since all locks use the tip of the rod, the tip of the rod may be damaged due to dimensional errors between the tip of the rod and the receiving hole of the mating frame, or due to external forces such as wind pressure during use. There was a drawback that it became difficult for the part to fit into the receiving hole.

Furthermore, by rotating the rotary plate that connects the base ends of the three rods via the operating member, the distal end engaging portions of each rod are engaged and locked through the receiving holes in the frame. Since the lock is unlocked by releasing the lock, there is a drawback that the rotation operation of the operating member is heavy.

In the conventional example (E), the upper and lower lock levers use rods, so the rod is difficult to engage in the receiving hole of the other party due to the misalignment between the abutting part of the latch and the engaging part at the tip of the rod. It has the disadvantage that it bends or recedes, making it difficult to release the engagement.

Furthermore, since the spring of one latch locks the lock by protruding the upper and lower rods, the spring of the latch requires a very large force.

Furthermore, since the latch and both the upper and lower rods are released by retreating by operating the handle, the handle must be operated until the engaging portions at the ends of the latch and rod are completely retracted from the mating holes. Not only that, but the frictional resistance caused the handle to be difficult to operate.

This invention attempts to provide a solution that eliminates all of the above problems.

(Means for Solving the Problems) As a means for solving the above problems, this invention provides a latch lock that has a latch bolt that is always projected in a temporarily locked state by a protruding holding member at the open end of a closing body such as a door. Two or more latch bolts are provided at appropriate locations on the side, top, or bottom of the side, and the protruding holding members of these latch bolts are connected to an interlocking mechanism consisting of a slider, a connecting rod, etc., and the operation member of the first latch bolt is actuated. All of the latch bolts are configured to be unlocked at the same time via the interlocking mechanism, and at least the other latch bolts other than the first latch bolt are provided to be reversible and to be freely engaged and detached from the engaging portion of the latch bolt. The latch bolt is provided with a locking piece that engages with the latch bolt to prevent the latch bolt from reversing.

(Function) According to this invention having the above configuration, (a) all the latch bolts can be unlocked simultaneously via the interlocking mechanism by operating the operating member of the first latch bolt. Furthermore, (b) simply by closing the door, a plurality of latch bolts (latch locks) are simultaneously and automatically temporarily locked without any locking operations such as keys or lever handles. Moreover, (c) even when large side pressure such as room pressure or wind pressure is acting in the opening direction of the door of a high pressure chamber or vacuum chamber, as in the conventional example,
There is no need to operate the lever handle or key to lock the door while resisting the side pressure and keep the door closed, making it easy to lock the door.

(Embodiment) A specific example in which an embodiment of this invention is applied to a three-point locking door will be described below with reference to FIGS. 1 to 11.

In Fig. 3, (A) is a closing body such as a door (hereinafter simply referred to as a door), and near the open end side of this door (A) is a door lock 1 having a first latch bolt 3 in the center. , an upper latch 10 having a latch bolt 12 other than the first latch bolt at the upper part, and a lower latch lock 20 having a latch bolt 22 other than the first latch bolt at the lower part, respectively.

The door lock 1 includes a lock case 2, the first latch bolt 3 housed in the lock case 2, and a latch handle 3.
It consists of a, latch hub 4, latch spring 5, etc.

The first latch bolt 3 is always projected in a temporarily locked state by a protruding holding member. This protruding holding member consists of a latch spring 5 that always biases the latch bolt 3 in the projecting direction, and a latch hub 4 having an engaging portion 4a that engages with the latch handle 3a. Although the shape of the latch hub 4 is arbitrary, in this embodiment it is formed of two plates approximately in the shape of a U-shaped lock, and a bifurcated notch 4b is formed at the rear of the latch hub 4.
A pin 7 is inserted into this notch 4b and connected to a slider 6 forming an interlocking mechanism. Further, an operating shaft 8a of an operating member 8 such as a lever handle or a knob is fitted into the hub hole 4c of the latch hub 4, and by rotating the operating member 8 in a predetermined direction, the first latch bolt 3 is slid backward. It is designed to be unlocked by moving the door.

As shown in FIGS. 1 to 5, the slider 6 passes through the lock case 2 vertically across the inside and outside, and is slidable up and down, and is normally held upward by a spring 6a. It is biased to balance the connecting rods forming an interlocking mechanism which will be described later.

Note that 9 is a dead bolt, which is not essential to this invention, but is locked and unlocked by operating a key, thumb turn, etc. as is well known.

As shown in FIGS. 1, 2, and 6, the upper latch 10 includes a latch bolt 12 in its case 11, and a protruding holding member that permanently protrudes and locks the latch bolt 12 in a temporarily locked state. A locking piece 13, a spring 14, a latch spring 15, and a storage case 16 for the latch bolt 12 are housed inside.

The locking pieces 13, 13 are shown in Fig. 1 and Fig. 2.
As shown in FIG. 6, a pair of upper and lower L-shaped plates consisting of a horizontal piece 13a and a vertical piece 13b are arranged symmetrically, and each is pivotally mounted in the side plate of the case 11 by a pivot 13c. A protrusion 13d is formed on the vertical piece 13b, and one of the locking pieces 13 is
When the protrusion 13d is pushed in the forward horizontal direction by a connecting rod 18, which will be described later, and rotated in the outward expansion direction, the other locking piece 13 is also symmetrically rotated in the expansion direction. It has been done.

Insertion holes 11a, 11a are formed coaxially on both the upper and lower surfaces of the case 11, and the insertion holes 11a, 11a are formed on the same axis.
A connecting rod 18 forming an interlocking mechanism connected to the upper end of the slider 6 via a joint 17 is inserted between 11a, and is normally formed into the connecting rod 18 as shown in FIGS. 1 and 6. A certain recess (small diameter part) 1
The protrusion 13d of the locking piece 13 is brought into contact with the locking piece 8a, and at this time, the front part (horizontal piece 13a) of the locking piece 13, 13
It contracts and rotates inward due to the elastic force of 4 and 14,
The horizontal piece 13 fits into the guide holes 16a, 16a bored on both the upper and lower sides of the storage case 16.
The front part of the latch bolt 12a engages with the engaging portions 12a, 12a formed on the latch bolt 12, and the latch bolt 1
This prevents the reversal of 2. At this time, the latch bolt 12 is urged in the projecting direction by the latch spring 15 and is in a temporarily locked state.

Furthermore, from the state where the protrusion 13d of the locking pieces 13, 13 is in contact with the concave portion (small diameter portion) 18a of the connecting rod 18, by operating the operating member 8 of the first latch bolt 3, the connecting rod 18 the second
When the locking piece 13 is moved downward (upward) as shown in the figure, the protrusion 13d of the locking piece 13 is pushed forward and horizontally by the large-diameter portion 18b of the connecting rod 18, and at the same time both locking pieces 13, 13 are pushed forward and horizontally. Front part (horizontal piece 13
a) is the pivot 13 against the elastic force of the springs 14, 14.
The latch bolt 12 is rotated outwardly to expand and rotate around c as the rotation center, and the latch bolt 12 is disengaged from the engaging portions 12a, 12a, so that the latch bolt 12 can be reversed and unlocked. become. This locking/unlocking operation of the latch bolt 12 is
9 and 11, in the state where the latch bolt 12 can be reversed as described above, the strike bolt attached to the opposite door frame etc. due to the force in the door opening direction The locking surface 12b of the latchbolt 12 that is engaged with the receiving hole is pushed, and the latchbolt 12 is reversed as shown by the chain line in FIG. In this state, it slides backward into the storage case 16 against the restoring force of the latch spring 15,
The engagement with the strike is released and the door can be unlocked, that is, the door can be opened. When the door is opened and the latch bolt 12 is released from the strike, the latch bolt 12 will protrude again due to the restoring force of the latch spring 15, as shown in FIGS. 6 and 11.
The state returns to the solid line state.

Although two locking pieces 13 are used for each pair of upper and lower locking pieces, it is also possible to use only one locking piece 13. However, if two bolts are used as in the embodiment, the latch bolt 12 can be prevented from swinging and can be operated stably, and there is an advantage that the locking strength against lateral pressure is increased.

As shown in FIGS. 1, 2, 7, and 8, the lower latch 20 has a case 21 that includes:
Latch bolt 22 similar to upper latch 10
and a pair of locking pieces 23, springs 24, and latch springs 25 forming the protruding holding members.
and a storage case 26 for the latch bolt 22 are installed facing downward, so that the latch bolt 22 can be freely engaged and detached into a receiving hole 30 recessed below the floor surface G by the operation of the protruding holding member or the like. ing. Furthermore, a cam 31 which is biased counterclockwise by a spring 32 and pivotally mounted by a pivot 33, and a backing plate 35 for pushing down the cam 31 are installed in the case 21 above the locking piece 23. has been done. 34 is a spring holder for the spring 32. Further, an insertion hole 21a is formed in the upper plate of the case 21, and a connecting rod 28 forming an interlocking mechanism connected to the lower end of the slider 6 via a joint 27 is inserted into the insertion hole 21a. Always the first
As shown in the drawings and FIG. 7, the tip of the connecting rod 28 is close to the backing plate 35.

That is, in the temporarily locked state shown in FIGS. 1 and 7, the connecting rod 28, which is the interlocking mechanism,
5 and the cam 31 are not pressed down, and the cam 31
The outer peripheral edge of the horizontal piece 23a of the locking piece 23 is also
Because it is only in contact with (or in close proximity to)
The front part of the locking pieces 23, 23 (vertical part 23
b) is contracted and rotated inward by the elastic force of the springs 24, 24, and is fitted into the guide holes 26a, 26a formed on both the left and right sides of the storage case 26, and the vertical part of the locking piece 23 is The front part of 23b is an engaging part 22a formed on the latch bolt 22,
22a to prevent the latch bolt 22 from being reversed.

From the temporarily locked state, when the connecting rod 28 is moved downward as shown in the second figure by operating the operating member 8 of the first latch bolt 3, the cam 31 is rotated clockwise via the backing plate 35. At the same time, the outer peripheral edge of the cam 31 pushes down the horizontal piece 23a of the locking piece 23, so both locking pieces 2
The front part (vertical part 23b) of 3, 23 is the spring 24, 2
4, the latch bolt 22 expands and rotates outward about the pivot 23c as a rotation center, and the latch bolt 22 is disengaged from the engaging portions 22a, 22a, so that the latch bolt 22 can be reversed. It becomes possible to unlock it.

The locking/unlocking operation of this latch bolt 22 is as follows:
This is as described for the upper latch 10.

Furthermore, in the lower latch lock 20, since the horizontal piece 23a of the locking piece 23 is pressed down by the outer peripheral edge of the fan-shaped cam 31, errors in the mounting position of the locking piece 23 and the cam 31 can be avoided. Even if there are dimensional errors, the horizontal piece 23a
This prevents the locking pieces 23, 23 from being pushed up beyond a certain level, and prevents inconveniences such as the locking pieces 23, 23 hitting the case 21.

(Modifications, etc.) Note that the mounting position and number of latch bolts are not limited to those in the embodiment, and various design changes can be made.

Also, a plurality of latch bolts can be provided at intervals in one lock case.

As the interlocking mechanism, in the above embodiment, joints 17 and 27 are connected to both ends of the slider 6, and connecting rods 18 and 28 are screwed to the joints 17 and 27, but any connection method may be used. In addition, the slider 6 and the connecting rods 18, 28 are not separated as in the embodiment,
It can also be provided integrally in the form of a single rod or plate.

In addition, latch bolts, latch hubs, and protruding holding members such as those adopted for door lock 1 are provided in other upper latch locks 10 and lower latch locks 20, and the protruding holding members of all these latch bolts are integrated into an interlocking mechanism. You can also connect. In that case, the latch hub of the upper latch 10 and the lower latch 20 may also be provided with an operating shaft or an operating member so that the lock can be unlocked from any lock, or the upper latch 10 or the lower latch may be provided with an operating shaft or an operating member. The latch lock 20 may also be constructed without the aforementioned operating shaft or operating member attached thereto.

(Effect of the invention) This invention provides two or more latch locks having latch bolts that are always projected in a temporarily locked state by a protruding holding member at appropriate locations on a closing body such as a door, and the protruding holding members of these latch bolts have an interlocking mechanism. and is configured such that all the latch bolts can be unlocked simultaneously via the interlocking mechanism by operating the operation member of the first latch bolt, and at least the other latch bolts other than the first latch bolt are Since the latch bolt is provided so as to be reversible and is provided with a locking piece that removably engages with the engaging portion of the latch bolt to prevent the latch bolt from reversing, the following effects are achieved. In other words, (1) All locks shall be latch bolts of latch locks;
Moreover, since at least all of the latch bolts other than the first latch bolt are reversible, multiple latch bolts (latch locks) can be opened simply by closing the door without using a key or lever handle. Temporarily locked simultaneously and automatically.

(2) Moreover, considering the above structure, the door can be closed smoothly with a small force. In other words, even when large side pressure such as room pressure or wind pressure is acting in the opening direction of the door of a high pressure room or vacuum chamber, the door can be kept closed against the side pressure as in the conventional example. , there is no need to use the lever handle or key to perform the locking operation, making the locking operation easy.

(3) Furthermore, the unlocking operation requires only the force to retract the first latch bolt and the force to disengage the locking piece from the vertically inverted latch bolt (the amount of engagement is constant). It can be unlocked smoothly with less force compared to . On the other hand, in conventional examples (b) to (e), the operating member must be operated until the end engaging portion of the latch and rod is completely retracted from the receiving hole of the other party, and due to the frictional resistance etc. There is a drawback that the rotational steering with respect to the operating member is heavy.

[Brief explanation of the drawing]

1 to 11 each show an embodiment of this invention. Fig. 1 is a partial longitudinal sectional view showing the temporarily locked state, Fig. 2 is a partial longitudinal sectional view showing the unlocked state,
Figure 3 is a schematic front view of the entire device showing the installed state of the door lock of the present invention, Figure 4 is a partially cutaway front view of the door lock, Figure 5 is a perspective view of Figure 4, and Figure 6 is the upper part. Fig. 7 is a longitudinal sectional view of the latch lock, Fig. 7 is a longitudinal sectional view of the lower latch lock, Fig. 8 is a schematic side view of the lower latch lock, Fig. 9 is a horizontal view of Fig. 4, and Fig. 10 is a perspective view of the inverted latch bolt. 11 are explanatory diagrams of the operation of the reversible latch bolt in the upper latch lock and the lower latch lock. 1...door lock, 3...first latch bolt, 4...
...Latch hub (protruding holding member), 5... Latch spring (protruding holding member), 6... Slider (interlocking mechanism), 8... Operation member, 10... Upper latch lock,
20... Lower latch lock, 12, 22... Latch bolt, 13, 23... Locking piece (protruding holding member), 14, 24... Spring (protruding holding member),
15, 25... Latch spring (protruding holding member), 1
6, 26... Storage case, 18, 28... Connecting rod (interlocking mechanism), 31... Cam, 35... Backing plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Two or more latch locks each having a latch bolt that is permanently projected in a temporarily locked state by a protruding retaining member are provided at appropriate locations on a closing body such as a door, and the protruding retaining member of these latch bolts is In addition to being connected to an interlocking mechanism, all the latchbolts can be unlocked at the same time via the interlocking mechanism by operating an operating member of the first latchbolt, and at least the other latchbolts other than the first latchbolt are connected to the interlocking mechanism. A door lock characterized in that the latch bolt is provided so as to be reversible, and a locking piece is provided which detachably engages with an engaging portion of the latch bolt to prevent the latch bolt from reversing. (2) The interlocking mechanism includes a slider in which the latch hub of the first latch bolt is pivotally supported by a pin, and a slider that is connected to both upper and lower ends of this slider via a joint, and that other latch bolts other than the first latch bolt can be moved in and out. A door lock according to claim 1 of the utility model registration claim, which is constituted by a connecting rod. (3) A recess is formed in a part of the connecting rod, and the rear end of the locking piece is brought into contact with this recess, and the front part of the locking piece is contracted inward by the elastic force of the spring, thereby tightening the latch bolt. While detachably engaging with the engaging portion of the locking piece, by moving the connecting rod up and down, the front portion of the locking piece is expanded outward with its large diameter portion against the elastic force of the spring. The door lock according to claim 2 of the utility model registration, wherein the door lock is configured to release the engagement with the latch bolt. (4) A cam is pivotally attached to the tip side of the connecting rod via a cover plate, and the locking piece is removably engaged with the engaging portion of the latch bolt by rotation of the outer periphery of the cam. The door lock according to claim 2 or 3, which is configured to prevent the latch bolt from reversing.