JPH0446462Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a door lock that is lightweight and compact, and allows the diameter of the mounting hole provided in the door to be reduced.

(Prior Art) Among conventional locks of this kind, for example, latch-type tube-type locks are generally composed of an elongated cylindrical lock body and a latch bolt, and when installed, a side hole that accommodates the lock body is inserted. This is accomplished by forming a mounting hole in the thickness direction of the door that opens at the end face of the door stop and further fixes the lock body. Of these, the latter mounting hole's shape and dimensions affect the strength of the mounting part, and also the dimensions of the catch or seat cover that hides the mounting hole, so the diameter of the hole is determined as much as possible. It is desired that the diameter be small.

Conventionally, in response to such requests,
For example, there is a technique disclosed in Japanese Utility Model Application Publication No. 58-174576, which was already proposed by the applicant. That is, in this publication, a lever protruding from the circumferential surface of a cam that is rotated by the handlebar is connected by an L-shaped link to the end of the rear rod that is integrated with the latch bolt, and the lever that is rotated by the handlebar is A door lock is shown in which the latch bolt is moved forward or backward in response to displacement.

(Problem that the invention aims to solve) However, in such door locks, the lever and link protrude outward from the casing that defines the lock body when unlocked, so the space for the protrusion is the amount of space in the mounting hole. The diameter was increased, which not only made machining the mounting holes more complicated, but also reduced the strength of the door.Furthermore, the catch and catch cover became larger, making the area around the door look unsightly. .

The present invention solves these conventional problems by reducing the size of the lock body and the diameter of its mounting hole, improving the strength and appearance of the door, and creating a door lock that can be locked and unlocked quickly. The purpose is to provide.

(Means for solving the problem) Therefore, the door lock of the present invention has a latch bolt integrated with a shaft pin with an engaging piece at the end, and a locking piece that can rotate together with the handle rod. a cam, the latch bolt and the cam are arranged coaxially within the lock case, a slide plate that can engage with the locking piece is provided movably along the inner surface of the lock case, and the slide plate A pair of screw insertion holes are provided at both sides of the cam of the lock case to be connected to the engagement piece, and a side hole and a mounting hole are provided at the end of the door to accommodate and attach the lock case, and the mounting hole In a door lock in which the cam and the screw insertion hole are positioned at the same position and the lock case is attached, the shaft pin is formed to have approximately the same length in the axial direction as the latch bolt, and a notch is provided at one end of the slide plate, and the lock case is attached. A yoke that can be engaged with the edge of the notch is provided on the inner surface of the lock case so as to be swingable in the direction of movement of the latch bolt, a tip of the yoke is engaged with the engagement piece through the notch, and One screw insertion hole is provided in a position close to the engagement piece when unlocking, and the other screw insertion hole is provided in a symmetrical position with the cam as the center, in order to miniaturize the lock body and reduce the diameter of its mounting hole. The feature is that the strength and appearance of the door have been improved, and it can be locked and unlocked quickly.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In Figs. 1 to 15, reference numeral 1 denotes a door whose base end is rotatably pivoted to a mounting post (not shown);
A horizontal hole 3 capable of accommodating a lock body 2 is opened at a suitable location on the door stop side end surface 1a, and a mounting hole 4 formed in the thickness direction of the door 1 communicates with the hole 3.

The lock body 2 has a lock case 6 that is integrally connected to the lock cover 5, and the case 6 has an elongated case body 7 with a substantially ship bottom-shaped cross section, as shown in FIGS. 3 to 5. , consists of a rectangular collar piece 8 molded protrudingly from one end of the main body 7, screw holes 9, 9 are molded in the upper and lower positions of this collar piece 8, and a large diameter latch bolt insertion hole 10 is formed between these. It is molded.

A large diameter recessed hole 11 is formed at one end of the case body 7 so as to face the opening of the latch bolt insertion hole 10, and a latch bolt 12 can be accommodated in this recessed hole 11. A latch spring 13 is inserted between the rear end surface of the latch bolt 12 and a partition wall to be described later, and urges the latch bolt 12 forward through the spring 13. A long stepped shaft pin 14 is provided protrudingly, and an engagement piece 15 is molded at the end of the reduced diameter portion 14a. At two positions corresponding to the engagement surfaces of the latch bolt 12 on the circumferential surface of the engagement piece 15, engagement protrusions 16, 16 having a planar triangular shape are provided, and their engagement walls 16a, 16a are inclined outwardly. is formed.

At a position adjacent to the recessed hole 11, there is a first wall partitioned by a partition wall 17, a thick peripheral wall 18, and a partition wall 19.
A recessed chamber 20 is provided, and the recessed chamber 20 communicates with each other via a notch 21 formed in the partition wall 17, and the shaft pin 14 is movable within this notch 21. A groove 22 is formed in the peripheral wall 18 facing the first cavity 20.
is formed, and a yoke 23 is swingably accommodated within this groove 22.

As shown in FIG. 9, the yoke 23 is composed of a substantially U-shaped plate, and has a yoke end 24 having an arcuate end face accommodated in the groove 22, and a yoke arm 25 protruding from the yoke end 24. ,2
5, the reduced diameter portion 14a of the shaft pin 14 is inserted into the locking wall 1, and one of the yoke arms 25 is inserted into the locking wall 1.
It is installed so that it can engage with 6a.

A projecting portion 26 projecting into the first recessed chamber 20 is provided at the tip of the partition wall 19, and between the projecting portion 26 and the peripheral wall 18, the recessed chamber 20 and the second recessed chamber 27 are provided.
A guide groove 28 is formed which communicates with the. On the upper surface of the peripheral wall 18 facing the recessed chamber 27 and the guide groove 28, there are recessed step portions 29a, 2 having the same height as each other.
9b, the peripheral wall 18 facing one of the stepped portions 29b is notched, and a slide plate 30 is slidably accommodated on these recessed stepped portions 29a, 29b.

The slide plate 30 is constructed by bending a steel plate thinner than the groove width of the guide groove 28, and as shown in FIG. The main sliding piece 31 has a downwardly projecting protruding piece 33 which is inserted into the guide groove 28. A substantially T-shaped hooking piece 34 is protruded from one end of the slide main piece 31, and the above-mentioned yoke arm 2
5 and 25 are engaged as shown in FIG. 6, and are enabled to engage with the notch edges 35a and 35b, and are normally engaged with one of the notch edges 35a.

On the other hand, the bent piece 32 has the concave step portion 29a,
A latching piece 36, which is housed on the cam 37 and has one end upright, engages with the cam 37.

The cam 37 is arranged coaxially with the latch bolt 12 and the shaft pin 14 in the lock case 6,
This consists of a substantially hollow cylindrical body, and its shaft cylindrical portion 38
is rotatably supported by locking both ends into a hole 39 formed in the second recessed chamber 27 and a hole (not shown) formed in the lock cover 5, and a handle is provided inside the shaft cylindrical portion 38. A square shaft hole 42 is formed into which a handle rod 41 integrated with 40 can be inserted.

A substantially tongue-shaped locking piece 43 and a projecting piece 44 are protrudingly molded in close proximity to each other on the shaft end side of the circumferential surface of the shaft cylindrical portion 38, and between the locking piece 43 and the projecting piece 44, the locking piece 36 are involved. Further, a ring-shaped engagement piece 45 is molded to protrude at a position opposite to the locking piece 43 in the middle part of the circumferential surface of the shaft cylindrical portion 38, and an abutment piece 46 is protruded from a position immediately below one end of the ring-shaped engagement piece 45. A cutout surface 47 is formed in the shaft cylinder portion 38 at the other end.

An elongated third recessed chamber 4 communicating with the second recessed chamber 27
A spring receiver 49 is housed at the end of the inner end of the spring receiver 8, and this spring receiver 49 has a flat sliding surface 50 as shown in FIG.
, and a notch 51 is provided in the majority part thereof.
A return spring 52 is inserted between the inner end surface of the partition wall 17 facing the third recessed chamber 48 and the notch end surface 51a of the spring receiver 49. one end of which is normally in contact with the end surface of the engagement piece 45, and the sliding surface 50 faces the cutout surface 47, and its upper edge engages with the cutout step 47a. There is.

In addition, reference numeral 53 in the figure indicates a stopper protruding from the bottom of the first recessed chamber 20 to restrict rotational displacement of the yoke 23, and reference numeral 54 indicates a stopper protruding from the bottom of the second recessed chamber 27. The rotation angle of the cam 37 is regulated through contact with the end surface of the contact piece 46. Numerals 55, 56, 57, and 58 are engagement pins that protrude from the bottom of the partition wall 17, the protruding portion 26, and the second recessed chamber 27, respectively, and fit into respective through holes (not shown) provided in the lock cover 5. This allows the lock cover 5 to be positioned.

59 is a screw insertion hole formed in the overhanging portion 26, which is provided close to the position of the engagement piece 15 when unlocking;
Reference numeral 0 denotes semicircular screw insertion holes formed in the outer end surface of the peripheral wall 18 defining one end of the second recessed chamber 27, into which mounting screws 62, 62 for fixing the seat 61 are inserted. 63 is a decorative plate attached to the collar piece 8, and 64 is a catch cover.

(Function) When attaching the door lock configured in this way to the door 1, the lock body 2 is attached to the door stop side end surface 1a of the door 1.
A horizontal hole 3 capable of accommodating the door 1 is formed, and a mounting hole 4 having a diameter slightly larger than the span of the screw insertion holes 59 and 60 is formed in the hole 3 in the thickness direction of the door 1.

In this case, as will be described later, the rotation radius of the locking piece 43 can be made smaller and the cam 37 can be made more compact.
The pitch of 60 can be made smaller accordingly, and the diameter of the mounting hole 4, which depends on the pitch, can be made smaller.

Therefore, the strength of the door 1 around the attachment hole 4 can be strengthened, the catch 61 and the catch cover 64 can be made smaller, and the appearance of the door 1 in this area can be improved.

Furthermore, by arranging the cam 37 within the lock case 6 on the same axis as the latch bolt 12 and the shaft pin 14, and by making the cam 37 more compact, the width of the lock body 2 can be made smaller, promoting miniaturization. let

Moreover, the length of the shaft pin 14 is the same as that of the latch bolt 12.
The length of the lock main body 2 that accommodates them can be shortened or shortened when the lock is unlocked, and one screw insertion hole 59 is arranged close to the position of the engagement piece 15 when the lock is unlocked. Therefore, the length of the entire lock body 2 becomes short or short.

Therefore, the width and length of the lock body 2 are reduced, and the overall size of the lock body 2 is reduced. Then, the lock main body 2 is accommodated in the horizontal hole 3, a decorative board 63 is superimposed on the collar piece 8, and this is fixed to the end face of the door 1 with screws.

Next, insert the handle rod 41 that is integrated with the handle 40 into which the catch seat 61 and the catch cover 64 have been inserted into the shaft hole 42 from one side of the mounting hole 4, push it in fully, and then insert the handle rod 41 into the catch seat 61. Insert the inserted mounting screws 62, 62 into the screw insertion holes 59, 60, make the threaded ends protrude to the rear of the lock body 2, and insert the threaded ends into the rear opening of the mounting hole 4 in advance. It is screwed into the screw hole of the catch seat (not shown) that was being held, and the lock main body 2 is fixed with both the catch seats.

After the lock main body 2 is fixed in this manner, a catch cover is attached to the rear catch seat, and a handle (not shown) is screwed to the tip of the handle rod 41.

When locking the lock body 2 attached to the door 1 in this way, the latch bolt 12 is biased by the latch spring 13 as shown in FIG.
It protrudes outward from the latch bolt insertion hole 10 and engages in a trowel provided in a door stop column (not shown). Under these circumstances, the latch bolt 12
The shaft pin 14 integrated with is biased to the left in FIG.
Since the reduced diameter portion 14a and the engagement piece 15 are displaced in the same direction, the yoke 23 hooked onto the reduced diameter portion 14a
The yoke arm 25 of is engaged with the engagement protrusion 16,
It is pulled around the yoke end 24 in the above direction, and one of the yoke arms 25 is attached to the slide plate 3.
It is engaged with the notch edge 35a on one side of 0.

Further, the protruding piece 33 of the slide plate 30 is connected to the stopper 5.
3, the bent piece 32 is placed on the concave step portions 29a, 29b,
A locking piece 36 located on one of the step portions 29b is engaged between the locking piece 43 and the protruding piece 44 of the cam 37. The cam 37 is normally given a rotational force by the return spring 52 in the counterclockwise direction in FIG. This maintains the stationary state as shown.

Under such a situation, when the latch bolt lock is unlocked and the handle 40 is rotated in the direction of the upward arrow in FIG. 1, and the handle rod 41 is rotated clockwise in FIG. It rotates in the same direction against the spring 52, and the rotational displacement causes the locking piece 43 to rotate in the same direction.
is transmitted to the slide plate 30 via the latch piece 36 engaged with the slide plate 30, the slide plate 30 is displaced to the right in the figure, and the protruding piece 33 enters into the guide groove 28, and the bent piece 32 slide in the same direction on the concave stepped portions 29a and 29b.

For this reason, the notch edge 35 on one side of the slide plate 30
The yoke arm 25, which is engaged with the yoke arm 25, is pulled to the right in FIG. Through the protrusion 16, the latch bolt 12
moves to the right in FIG. 2 against the latch spring 13.

In this case, as the projecting piece 33 moves along the guide groove 28, the sliding plate 30 is forced to move linearly parallel to the adjacent peripheral wall 18, so that the bent piece 32 moves over the concave steps 29a and 29b. Move approximately parallel. Therefore, the bending piece 32 and the locking piece 36 will not rub against the recessed step portions 29a, 29b and will not interfere with the unlocking operation, nor will they protrude to the outside of the lock case 6.

Therefore, when machining the mounting hole 4 formed in the door 1, there is no need to secure space for the above-mentioned protrusion of the bending piece 32 and the locking piece 36, so only the space between the through hole 59 and the recessed hole 60 is required. The diameter of the mounting hole 4 can be made smaller as long as the hole diameter has the determined dimensions.

In addition, in this case, the shaft pin 14 integrated with the latch bolt 12 is positioned closer to the yoke arm 2 than the slide plate 30.
5, the displacement of the slide plate 30 is magnified and transmitted to the shaft pin 14, resulting in a large retraction displacement of the latch bolt 12.

Therefore, the latch bolt 12 quickly unlocks, and likewise quickly locks.

Furthermore, since the displacement of the slide plate 30 is magnified and transmitted to the latch bolt 12 as described above,
The displacement of the slide plate 30 can be designed to be relatively compact, and the rotation radius of the cam 37, that is, the locking piece 43
This makes it possible to reduce the rotation radius of the cam 37 and the rotation angle of the cam 37, making the cam 37 more compact.

Therefore, the locking piece 43 does not protrude from the lock body 2 when it is rotated, and due to its compact size,
The pitch of the screw insertion holes 59 and 60 provided on both sides of the cam 37 can be made small.

In this manner, when the handle rod 41 is rotated by a predetermined angle, the abutment piece 46 abuts against the stopper 54, and the rotation of the cam 37 is stopped, resulting in an unlocked state as shown in FIG. That is, in this case, the slide plate 30 is displaced to the maximum, the tip of the yoke 23 is positioned toward the overhang 26, and at the same time, the engagement piece 15 is moved to a position close to the overhang 26, and the latch bolt 12 is recessed. It is drawn into the hole 11 and pulled out from the troyoke.

(Effect of the invention) As described above, in the door lock of the present invention, the cam is arranged coaxially with the latch bolt and the shaft pin within the lock body, and the shaft pin is formed to have approximately the same length in the axial direction of the latch bolt. The length of the lock body can be made compact.

Further, the present invention provides a notch at one end of the slide plate, a substantially U-shaped yoke that can be engaged with the edge of the notch, and the yoke is arranged on the inner surface of the lock case in the direction of movement of the latch bolt. Since it is swingable and the tip of the yoke is engaged with the engagement piece through the notch, the displacement of the slide plate can be magnified and transmitted to the latch bolt, and the displacement is smaller than that of the slide plate or the cam. , the latch bolt can be locked and unlocked quickly.

Therefore, this makes it possible to reduce the turning radius of the cam, which allows the cam to be configured compactly, and the locking piece does not protrude from the lock body as in the conventional case. The width of the lock body can be made compact, and together with the above, the length and width of the lock body can be made compact.

Furthermore, in the present invention, one screw insertion hole is provided at a position close to the engaging piece when unlocking, and the other screw insertion hole is provided at a symmetrical position with the cam as the center, so that by miniaturizing the cam, The pitch of the screw insertion hole can be designed to be small, and the diameter of the mounting hole depending on the pitch can be reduced.

Therefore, the strength of the door around the mounting hole can be improved, and the seat and seat cover that hides the mounting hole can be made smaller, improving the appearance of the door, among other practical effects. There is.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a partial sectional view showing an embodiment of the present invention, and shows the locked state. Figure 3 is a partial sectional view showing an example of a lock case applied to the present invention, Figure 4 is a sectional view taken along line A-A' in Figure 3, and Figure 5 is B in Figure 3.
6 is a perspective view showing the relationship between the latch bolt, yoke, and slide plate used in the present invention; FIG. 7 is a front view showing an example of the latch bolt used in the present invention; The figure is C- in Figure 7.
9 is a perspective view showing an example of the yoke used in the present invention, FIG. 10 is a perspective view showing an example of the slide plate used in the present invention, and FIG. 11 is a perspective view showing an example of the slide plate used in the present invention. Perspective view showing an example of the cam used, No. 12
The figure is a slightly enlarged plan view of Figure 11,
Fig. 13 is a bottom view of Fig. 12, Fig. 14 is a perspective view showing an example of the spring receiver used in the present invention, and Fig. 15 is a sectional view showing the operating state of the present invention, showing the unlocked state. There is. 6...Lock case, 12...Latch bolt, 28
... Guide groove, 30 ... Slide plate, 37 ... Cam, 41 ... Handle rod.

Claims (1)

[Scope of utility model registration request] A latch bolt integrated with a shaft pin with an engaging piece on the flange, and a cam having a locking piece and rotatable together with the handle rod are provided, and the latch bolt and cam are arranged on the same axis inside the lock case. A slide plate that can be engaged with the locking piece is movably provided along the inner surface of the lock case, and the slide plate is linked to the engagement piece, and a pair of screws are provided on both sides of the cam of the lock case. A door lock is provided with an insertion hole, a side hole in which a lock case can be accommodated and attached, and a mounting hole at the end of the door, the cam and the screw insertion hole are positioned in the mounting hole, and the lock case is mounted. The shaft pin is formed to have approximately the same length in the axial direction as the latch bolt, and a notch is provided at one end of the slide plate, and a yoke that can be engaged with the edge of the notch is provided.
The latch bolt is provided swingably on the inner surface of the lock case in the direction of movement of the latch bolt, and the tip of the yoke is engaged with the engagement piece through the notch, and one screw insertion hole is connected to the engagement piece when unlocking. A door lock characterized in that the screw insertion hole is provided in a position close to the cam, and the other screw insertion hole is provided in a symmetrical position with respect to the cam.