JPH0122866Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a door clasp with a removable handle used for furniture, buildings, etc. More specifically, the handle for operating the clasp can be removed only when the clasp is in the locked position. This relates to a clasp that can be used as a lock.

Conventionally, the clasps used for doors of furniture, etc., are usually called door locks, and most of them are single-purpose ones that only function as a clasp, and those that also function as a lock are simply a clasp and a lock. It was nothing more than a combination of the two.

This invention takes these circumstances into consideration and aims to provide a door clasp that has a simple structure and also functions as a lock.

The present invention will be explained in detail below with reference to an embodiment shown in the drawings. As shown in FIGS. 1 to 3, this embodiment includes a cam 3 consisting of a hollow shaft 1 and a cam plate 2, a suspension plate 4, a suspension plate biasing spring 5, a driven plate 6, and two Driven plate biasing spring 7, 7,
It consists of a housing 8 for housing these, a cover plate 9, and a handle 30 shown in FIGS. 15 and 16.

Next, each of the above-mentioned members will be explained in detail. First, the hollow shaft 1 has a square handle insertion hole 10, as shown in FIGS. 6 to 8.
along the axis and one side of the outer periphery (the eighth
On the left side of the figure, there is a slit 11 that communicates with the handle insertion hole 10 and is perpendicular to the axial direction. Furthermore, a slide hole 12 is provided at the center of the slit 11 and passes through the side wall at right angles to the axial direction.

As shown in FIGS. 9 and 10, the cam plate 2 is provided with a cam surface 13 on its outer peripheral surface that has an oval planar shape, which will be described in detail below.

That is, in FIG. 9, the cam surface 13 has a linear right side surface 13R on the right side of the drawing, a linear left side surface 13L on the left side, an arcuate end surface 13A at the lower end, and an arcuate end surface 13B at the upper end. A contact point P is provided at the intersection between the end surface 13A and the right side surface 13R, and a contact point Q is provided at the intersection point between the end surface 13B and the right side surface 13R.

Further, the cam plate 2 is provided with a hollow shaft fitting hole 14 into which the hollow shaft 1 is fitted, as will be described later.

Therefore, this hollow shaft fitting hole 14 has an engaging side 14a parallel to the short axis of the elliptical cam surface 13.
, right side surface 13R, left side surface 13L and end surface 13
It has a planar shape consisting of semi-elliptical portions each located a certain distance inside from A. Further, a slide pin driving hole 15 having the long axis of the oval cam surface 13 as its axis is provided in a penetrating manner at the center in the thickness direction.

As shown in FIGS. 11 and 12, the hollow shaft 1 and the cam plate 2 are such that the engaging side 14a of the hollow shaft fitting hole 14 of the cam plate 2 is fitted into the slit 11 of the hollow shaft 1, Cam plate biasing spring 16 inserted between the hollow shaft 1 and the semicircular portion of the hollow shaft fitting hole 14
A slide pin 17 is driven into the slide pin drive hole 15 of the cam plate 2 and the slide hole 12 of the hollow shaft 1 through the cam plate 2 and assembled, thereby forming the cam 3 as a whole. Therefore, the cam plate 2 is normally operated by the cam plate biasing spring 16 so that the engaging side 14a of the hollow shaft fitting hole 14 projects into the handle insertion hole 10 of the hollow shaft 1 as shown by the solid line in FIG. When the cam plate biasing spring 16 is held in the position shown in FIG. direction, engage side 1
4a is the handle insertion hole 10 of the hollow shaft 1
It can be moved to a locked position where it does not protrude inwards.

The suspension plate 4 is shown in Figs. 4 and 5.
As shown in the figure, a thick nail 18 having a substantially rectangular planar shape on the short side thereof also has a rectangular planar shape.
It has a shape that protrudes to the left in the figure, and is provided with an oval escape hole 19 in the center portion. The lower surface of the tip of the pawl 18 is largely chamfered and provided with an inclined surface 18a, and between the pawl 18 and the relief hole 19, there is a gap between the end surface 13A or 13B of the cam surface 13 of the cam plate 2 under the conditions described below. A letter-shaped contact surface 20 as shown in FIG. 4 is provided so as to be in contact with it. On the opposite side of the relief hole 19 from the claw 18, there is provided a wall portion 21 projecting upward, and on the outer wall surface thereof, a spring seat 2, which is a round hole with a bottom at the center downward, is provided.
2 is machined, and through holes 23, 23 are provided at two locations above it.

As shown in FIGS. 1 to 3, the housing 8 has a rectangular parallelepiped outer shape, and a housing recess 24 for housing and mounting the suspension plate 4 is bored in the center thereof. This storage recess 24
One side wall (the left side wall in FIG. 1) has a notch 2 having a rectangular cross section so as to accommodate the claw 18.
5. Thus, the lower surface and side surfaces of the central portion of the suspension plate 4 are in contact with the inner surface of the storage recess 24, and the pawl 18 is in contact with the bottom surface and side surface of the notch 25, so that the pawl 18 can freely slide in the direction in which it protrudes. be able to. Further, a recess 24A is provided on the inner surface of one side wall (the upper side in FIG. 1) of the storage recess 24 so as not to interfere with the displacement of the cam plate 2, which will be described later. Further, a support hole 26 with a bottom for supporting the lower end of the hollow shaft 1 is provided approximately at the center of the bottom surface of the storage recess 24 . Further, one mounting screw hole 27 is provided at each corner of one side (left side in the figure) of the open end surface of the storage recess 24, and a cover plate 9, which will be described later, is mounted thereon.

As shown in FIGS. 1 to 3 and FIG. 17, the cover plate 9 is a plate-shaped object having a substantially rectangular planar shape, and is located in the storage recess 2 of the housing 8.
4 and has a mounting hole 28 at a position corresponding to the mounting screw hole 27 thereof. In addition, the storage recess 24
The hollow shaft 1 is located at a position corresponding to the support hole 26 of
A bearing hole 29 is provided that obstructs the vicinity of one end.

The handle 30 is inserted into the handle insertion hole 1 of the hollow shaft 1, as shown in FIGS. 15 and 16.
At one end of the main body is a handle shaft 31 having a square cross-sectional shape that engages with the handle shaft 1 and an engagement groove 32 that engages with the engagement side 14a of the cam plate 2 that protrudes from the slit 11 of the hollow shaft 1 into the handle insertion hole 10. It has a protruding shape. Particularly in this embodiment, the tip of the handle shaft 31 has a U-shaped groove 33 for escaping the slide pin 17 of the cam 3.
is machined from the tip, and the engagement side 14a is formed at the position where the bottom of the U-shaped groove 33 and the slide pin 17 come into contact.
The depth of the U-shaped groove 33 is determined so that the axial positions of the engagement groove 32 and the engagement groove 32 coincide with each other.

As shown in FIGS. 13 and 14, the driven plate 6 has two spring seats 34, 34 on one surface, and the back surface thereof is in contact with the right side surface 13R of the cam surface 13 of the cam plate 2, as will be described later. It has a planar contact surface 35. Particularly in this embodiment, a spacer piece 35a having a U-shaped planar shape and a constant thickness projects at right angles from the upper part of the contact surface 35, and the spacer piece 35a has a horizontal L-shape as a whole when viewed from the side.

Next, the cam 3, suspension plate 4, and driven plate 6 are assembled by a housing 8 and a cover plate 9 as follows. That is,
As shown in FIGS. 1 to 3, the housing 8
The suspension plate 4 is inserted into the storage recess 24, and the claw 18 is fitted into the notch 25. The lower end of the hollow shaft passes through the escape hole 19 of the suspension plate 4 and is supported in the support hole 26 of the housing 8 in the state shown in FIG.
A driven plate 6 is inserted between the right side surface 13R of the cam surface 13 and the wall portion 21 of the suspension plate 4. In this state, the driven plate 6
Driven plate biasing springs 7, 7 are fitted between the spring seats 34, 34 of the driven plate 6 and the side wall of the housing 8, passing through the through holes 23, 23 provided in the wall 21 of the suspension plate 4. The contact surface 35 is biased so as to always come into contact with the right side surface 13R of the cam surface 13, and the suspension plate 4 has a suspension fitted between the spring seat 22 provided on the wall portion 21 and the side wall of the housing 8. The claw 18 is biased in the protruding direction by the spring plate biasing spring 5, and the wall portion 21 comes into contact with the driven plate and remains stationary. Then, a cover plate 9 is stacked from above so as to cover the storage recess 24 of the housing 8, and a mounting screw (not shown) and a mounting screw hole 27 of the housing 8 are inserted into the mounting hole 28 provided at the corner. It is fixed to the housing 8. At this time, the cam 3 is supported by the support hole 26 of the housing 8 and the bearing hole 29 of the cover plate 9.

In the fastener assembled as described above, the handle 30 is inserted into the handle insertion hole 10 while ensuring that the engaging side 14a of the hollow shaft fitting hole 14 of the cam plate 2 does not protrude into the handle insertion hole 10. By rotating the handle 30 and rotating the hollow shaft 1, the fastener can be moved between the normal position (also referred to as the normal position) shown in FIGS. 1 to 3 and the locked position (detailed below). position) and an unlocked position (also called open position).

Next, the operation of the above embodiment will be explained with reference to FIGS. The spring force of the biasing springs 7, 7 of the driven plate 6 is directly transmitted to the driven plate 6, and the driven plate 6 is moved to the left in the figure by the resultant force F of these spring forces. That is, the claw 18 is biased in the direction of protruding from the housing 8.

On the other hand, the cam plate 2 is urged downward in the figure by the cam plate urging spring 16, and the engaging side 14a of the cam plate 2 is engaged in the slit 11 of the hollow shaft 1, and the handle insertion hole 10
It is urged to protrude inward.

First, the normal position will be explained with reference to FIG. 18. In this position, as is clear from the figure, the entire surface of the contact surface 35 of the driven plate 6 is in contact with the entire surface of the right side surface 13R of the cam plate 2. The resultant force F is applied to the right side 13R along the center line L of the clasp.
, the cam plate 2 remains stationary while maintaining a vertical position as shown in FIG. 18, and the suspension plate 4 causes the pawl 18 to protrude from the housing 8 as shown by the solid line due to the resultant force F. The door can be held closed. In this case, if the claw 18 is pushed in against the resultant force F, the suspension plate 4 will move against the contact surface 20 as shown by the chain line.
is pushed in until it comes into contact with the left side surface 13L of the cam surface 13 of the cam plate 2, but when this pushing force is released, the resultant force F immediately returns it to the position shown by the solid line.

In this position, the cam plate 2 is urged downward in the drawing by the cam plate urging spring 16, and the engaging side 14a is connected to the handle insertion hole 1.
Since the handle 30 protrudes into the handle 0, the handle 30 cannot be removed from the handle insertion hole 10.

Next, the process of transition from the normal position to the lock position will be explained with reference to FIG.
The cam plate 2 is inserted through the arrow M shown in FIG.
When the right side surface 13R of the cam plate 2 is rotated counterclockwise by the angle θ shown in the figure, the right side surface 13R of the cam plate
Only the contact surface 35 of the driven plate 6 is contacted and pressed by the resultant force F. At this time, the resultant force F
A component force F1 parallel to the longitudinal center line L1 of the cam plate 2 is generated, and this component force F1 pushes the cam plate 2 upward in the figure against the biasing spring 16. 14a still protrudes into the handle insertion hole 10, and the handle 30 cannot be removed. At this point, a component force F2 perpendicular to the center line L1 is acting on the cam plate 2, so when the handle 30 is released, the cam plate 2 automatically returns to its normal position.

Next, the lock position will be explained with reference to FIG. 20. When the cam plate 2 is further rotated counterclockwise from the position shown in FIG. 19, the contact point P gradually moves upward in the figure, and the value of component force F1 becomes It gradually increases. Therefore, the cam plate 2 further compresses the biasing spring 16 by the component force F1 and is displaced upward, and the engaging side 14a escapes out of the handle insertion hole 10 as shown by the broken line, and the handle 30 is inserted into the handle. It becomes possible to extract it from the hole 10.

When the contact point P coincides with the center line L of the clasp, this becomes the dead center, and beyond this point, the cam plate 2 tries to rotate further counterclockwise due to the resultant force F, so the handle 30 Even if the cam plate 2 is removed, the cam plate 2 can maintain this position without returning to the normal position.
This clasp can therefore double as a lock. Note that in the state shown in FIG. 20, the suspension plate 4 can be pushed to the right in the figure by the length D shown in the figure, but when the cam plate 2 is further rotated counterclockwise, the end surface 1 of the cam plate 2
3B comes into contact with the contact surface 20 of the suspension plate 4, the suspension plate 4 can no longer be displaced in any direction.

Next, the open position will be explained with reference to FIG. 21. When the cam plate 2 is rotated clockwise from the normal position in the direction of arrow N against the resultant force F,
The contact surface 35 of the driven plate 6 is pushed by the contact point Q above the cam surface 13 of the cam plate 2, and the driven plate 6 and the suspension plate 4 move to the right in the figure, and the pawl 18 moves toward the housing. 8
The door can be opened and closed freely.
In this case, when the handle 30 is released, the cam plate 2 is restored to its normal position by the resultant force F. Now, in this open position, the cam plate 2 receives the resultant force F at the contact point Q.
The component force F1 described above is in the opposite direction to that in FIGS. 19 and 20. Therefore, the cam plate 2 has a component force F
1 and the spring force of the cam plate biasing spring 16, the engaging side 14a protrudes into the handle insertion hole 10, making it impossible to remove the handle 30.

In the above embodiment, a spacer piece 35a is interposed between the cam plate 2 and the cover plate 9 to determine the position of the cam plate 2 and smooth its movement. By providing the driven plate 6 integrally with the driven plate 6, it is possible to prevent the position of the driven plate 6 from shifting during operation. Of course, it is also possible to provide the spacer piece 35a and the driven plate 6 separately.

That is, the handle removable door clasp according to the present invention includes a suspension plate 4 having a protruding pawl 18 at one end for locking the door, and a housing 8 formed in a substantially box shape, with the pawl 18 being attached to the housing 8. The housing 8 is mounted by applying a biasing force in a direction protruding from one end thereof, and has a handle insertion hole 10 in the axial direction, and has a handle insertion hole 10 on one side thereof.
A hollow shaft 1 having a slit 11 communicating with the
and an elongated fitting hole 14 having an engaging side 14a on the inner circumferential surface that can be engaged into the slit 11, and the suspension plate 4 on the outer circumferential surface against the urging force. Cam surface 1 that can be selectively switched to normal position, locked position and unlocked position
3, and the cam plate 2 rotates as the hollow shaft 1 is rotated from its normal position to displace the suspension plate 4 to a locked position or an unlocked position. At the same time, the engaging side 14a slides relative to the hollow shaft 1 so that the engaging side 14a protrudes and retracts into the handle insertion hole 10, and when the suspension plate 4 is in the locked position, the engaging side 14a The hollow shaft 1 is fitted into the fitting hole 14 of the cam plate 2 so as to be detached from the handle insertion hole 10, and due to this structure, the hollow shaft 1 can be inserted through the handle for opening and closing the door. The door can be locked, opened and closed by selectively switching the clasp from the normal position of the shaft 1 to the locked or unlocked position, and the handle cannot be pulled out from the hollow shaft 1 in the locked position. Therefore, the clasp of the present invention can also be used as a regular lock, making it extremely practical.

The clasp according to the present invention is of a type in which the handle is inserted into the hollow shaft 1, and can be attached to and removed from the clasp in the same way as a normal lock key. Therefore, handles with various designs can be prepared and selected appropriately according to the design of the door, and unlike conventional clasps, no wood screws are used to replace them, making it extremely easy to replace. The clasp of the present invention is simple and has great practical value in this respect as well.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention, and FIG. 1 is a plan view in the normal position, with the cover plate 9 removed. Figure 2 is A of Figure 1.
-A sectional view, Figure 3 is a BB-B sectional view in Figure 1,
Figure 4 is a plan view of the suspension plate, Figure 5
The figure is its front view, Figure 6 is a plan view of the hollow shaft, Figure 7 is its front view, Figure 8 is its left side view, Figure 9 is a plan view of the cam plate, and Figure 10 is its side view. , FIG. 11 is a plan view showing the assembled state of the cam, FIG. 12 is a front view of the center cross section, and FIG.
The figures are a plan view showing the driven plate, Fig. 14 is a front view thereof, Fig. 15 is a front view of the handle, Fig. 16 is a left side view thereof, Fig. 17 is a plan view showing the cover plate, and Fig. 18 is a plan view showing the driven plate. ~Figure 21 is a plan view explaining the action, Figure 18 shows the normal position,
FIG. 19 shows the process of shifting from the normal position to the locked position, FIG. 20 shows the locked position, and FIG. 21 shows the open position. 1... Hollow camshaft, 2... Cam plate, 3... Cam, 4... Suspension plate, 6... Driven plate, 8... Housing, 1
0...Handle insertion hole, 11...Slit,
13...Cam surface, 14...Hollow shaft fitting hole,
14a... Engagement side, 18... Claw, 20... Contact surface, 30... Handle.

Claims (1)

[Scope of utility model registration request] A suspension plate 4 having a protruding pawl 18 at one end for locking the door is applied to a housing 8 formed into a substantially box shape in a direction in which the pawl 18 protrudes from one end of the housing 8. A hollow shaft 1 having a handle insertion hole 10 in the axial direction and having a slit 11 communicating with the handle insertion hole 10 on one side thereof is provided, and the inside of the slit 11 and the handle insertion hole are connected to each other. 10 for rotationally operating the hollow shaft 1. A cam plate 2 is provided with a cam surface 13 on its outer peripheral surface that can selectively switch the suspension plate 4 to a normal position, a locked position, and an unlocked position against the urging force. , the hollow shaft 1
As the suspension plate 4 is rotated from its normal position, it is rotated to displace the suspension plate 4 to the locked position or the unlocked position, and the engagement side is slid relative to the hollow shaft 1. 14
a into and out of the handle insertion hole 10,
Moreover, the hollow shaft 1 is fitted into the fitting hole 14 of the cam plate 2 so that the engaging side 14a is detached from the handle insertion hole 10 when the suspension plate 4 is in the locked position. A door clasp with a removable handle.