JP2001027065A - Reference position adjusting device for guard arm in lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reference position adjusting device for guard arm in alarm lock which has a sufficient margin to adjust allowing simple operation and construction. SOLUTION: A circular arm shape is formed at one corner of a rectangular plate parallel to a strike plate, a tool and a linking portion 9 are formed on the surface of this corner portion, on the other hand, other corner facing the corner is sliced diagonally thereby forming a slanted side 14 diagonally intersecting with a rectangular short side 12 and a rectangular long side 13 with an angle of 135 degrees respectively, thereby constituting a cam 11 adjusted using the difference in the length of perpendiculars brought down from the center of the circular arc at the corner '1' to a short side 12, a slanted side 14 and a long side 13 of the rectangle, and an adjust angle position of this adjust cam 11 is held by a click device consisting of two sheets of spring leaves 23, 23 and an octagonal cross section 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guard arm reference position adjusting device (hereinafter simply referred to as an adjusting device) for a guard lock for restricting the opening angle of a door to a small value in order to confirm a visitor or to deliver mail.

The above reference position indicates a standby position or a storage position of the guard arm on a substrate (strike plate) attached to the door frame when the guard arm is not used. A novel device for adjusting an engagement member (hereinafter, referred to as a guard arm engagement rod) so as to be appropriate.

[0003]

2. Description of the Related Art As a conventional technique of this kind, for example, a technique described in Japanese Utility Model Publication No. 5-32602 can be mentioned.

In this device, an arm having a deadbolt engagement hole at one end is mounted on the other end of a mounting base fixed to a prospective surface of a door frame corresponding to the side where the deadbolt enters and exits. Attached so that it can rotate in the expected direction,
The base has a rising wall located on a side of a door abutting protruding wall protruding from an inner peripheral surface of a door frame with respect to the arm, and the arm is disposed between the rising wall and the arm with respect to a vertical line passing through a shaft attachment portion of the arm. An adjustment body with an arm contact part that changes the angle is provided, and during long-term use, a gap occurs between the guard arm engagement hole at the reference position and the dead bolt, and when the guard arm is activated Alternatively, the angle position of the guard arm at the reference position can be finely adjusted when the dead bolt cannot be engaged or penetrated during locking or the smooth operation is hindered by being hooked.

[0005] Further, the present applicant has previously filed Japanese Patent Application No.
No. 2114 and Japanese Patent Application No. 8-61824 proposed a different type of adjusting device.

[0006] In each of the adjusting devices according to the earlier proposals of the present applicant, an adjusting mechanism is provided on the movable guard arm side.

[0007]

The conventional adjusting device described above can adjust the reference position steplessly or in multiple steps, but the adjustment can be made only after understanding the adjustment principle. However, since the operator does not understand the principle in an actual construction site, there is a disadvantage that only the two ends of the adjustment range are used.

In addition, the adjustment work, such as loosening or tightening the screw or moving the adjustment body to find the optimum adjustment position, is rather troublesome and impractical.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an adjusting device in which the principle of adjustment and the adjusting operation are extremely easy, and which has a practically sufficient adjusting range, thereby solving the above-mentioned disadvantages. .

[0010]

In order to achieve the above object, the present invention is to form one corner of a rectangular plate parallel to a strike plate attached to a door frame into an arc shape and to form the corner. An engaging portion with the tool is formed on the surface of the rectangular shape, while the other corner portion facing the one corner portion is cut obliquely and obliquely intersects with the short side and the long side of the rectangle at an angle interval of 135 degrees. Forming an inclined cam, and forming an adjustment cam having an adjustment value that is a difference between the lengths of perpendiculars drawn from the center of the arc of the one corner to the short side, the inclined side and the long side of the rectangle, and the other strike. One end of the arm is swingably supported on the plate, and the other end of the guard arm has an engagement hole for engaging the guard arm engagement rod at the other end. It supports the center of the adjustment cam so that it can rotate around the center, and the short side, inclined side and long side of the adjustment cam The angular position toward characterized in that a click device to keep elastically.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. In FIG. 1, reference numeral 2 denotes a strike plate attached to a door frame (not shown) with screws 2 and 2,
One side of this strike plate 1 is bent,
It has a rising portion 3 whose cross-sectional shape is a downward-shaped ladle (see FIG. 2).

The strike plate 1 in the illustrated example is formed in a box shape with one side plate removed and opened so that the guard arm 4 described later can be swung in the direction of arrow P in FIG. 1 by swinging. ing. Reference numerals indicate flange portions provided at the upper and lower ends of the strike plate 1.

An upper end of a guard arm 4 is swingably supported on an upper end of the strike plate 1.

The guard arm 4 in the illustrated embodiment is
The sword comprises two members fitted so as to be able to be pulled out and inserted like a blade and a sheath. An engagement hole 7 for engaging with the guard arm engagement rod 6 is opened at the lower end thereof.

In the meantime, the tip of a dead bolt configured to be able to protrude in two stages is engaged with the guard arm of a normal guard lock. In the illustrated embodiment, the dead bolt opened at the lower end of the strike plate 1 is used. Since a hook-shaped hook usually used for locking a sliding door is swung into and engaged with the engaging hole 8, the guard arm engaging rod 6 which engages with the guard arm 4 is a dead bolt. Different members are used.

However, it is not the gist of the present invention that the guard arm engaging rod 6 that engages with the guard arm 4 is a member different from the dead bolt, and therefore, a more detailed description is omitted.

The adjusting device for adjusting the reference position of the guard arm 4 shown by a solid line in FIG. 1 is shown in FIGS.
As shown in FIG. 1, it is built in the rising portion 3 of the strike plate 1, and in FIG. 1, the engagement portion 9, which is a part of the rising portion 3, is seen through a circular opening opened on the upper surface of the rising portion 3.

That is, as shown in FIGS. 3 and 4, the adjusting device according to the present invention includes an adjusting cam 11 parallel to the strike plate 1, and the adjusting cam 11 has one corner of a rectangular plate formed in an arc shape. And a small plate material formed by diagonally shaving the other corner portion facing the one corner portion to form oblique sides 14 obliquely intersecting with the rectangular short side 12 and the long side 13 at an angle interval of 135 degrees. It is.

On the surface (upper surface in FIG. 3) of the one corner, a small pillar having the same diameter as that of the circular arc is formed. Are formed integrally with each other.

An octagonal cross section 15 and a support shaft 16 having a circular cross section are integrally provided coaxially with the engagement section 9 on the lower surface side of the one corner. These members are integrally connected to each other to form a cam block 17.

On the other hand, below the cam block 17 in FIG. 3, there is provided a holder 18 for instructing the cam block 17 to be rotatable and also serving as a click device.

This holder 18, as shown in FIG.
For example, the lower ends of a pair of square pillars 19 made of a rigid resin are integrally connected by a rectangular bridge plate 21.

Incidentally, in order to reduce the weight and save the material, the square pillar 19 is hollowed out by stealing the meat from the lower end face side.

The widths of the square pole 19 and the bridge plate 21 are set to be substantially the same as the inner dimensions of the groove formed inside the rising portion 3 of the strike plate (see FIG. 4).

In the center of the bridge plate 21, a support shaft hole 22 is provided which is rotatably fitted to the support shaft 16 of the cam block.

A pair of spring plates 23, 23 are formed below the surfaces of the pair of square pillars 19, 19 facing each other so as to connect them.

The spring plates 23 are formed at the same time when the holder 18 is injection-molded, and are made of the same synthetic resin as the holder 18.

The interval between the spring plates 23, 23 is set to be slightly larger than the interval between the opposing side surfaces of the octagonal section 15 of the cam block.

The set of spring plates 23 and the octagonal section 15 of the cam block inserted between them
Constitutes a click device that intermittently holds the angular position of the adjustment cam 11 at an angle interval of 45 degrees.

The cam block 17 configured as described above
And the holder 18 is provided with the former spindle 16 in the latter spindle hole 2.
2 and these are integrally assembled such that the octagonal cross section 15 of the former is sandwiched between the pair of spring plates 23, 23.

On the other hand, as shown in FIGS. 1, 2 and 4,
At a predetermined position in the longitudinal direction of the rising portion 3 of the strike plate 1, an opening (not numbered) for fitting with the tip of the engaging portion 9 of the cam block is formed on the upper surface of the rising portion 3. An operation window 24 (see FIG. 4) is previously formed on the side surface on the opposite side.

Then, as shown in FIG. 2, the cam block 17 and the holder 18 assembled as described above are combined with the cavity of the rising portion 3 from the back side of the strike plate 1 before being attached to the door frame. Then, the tip of the engaging portion 9 of the cam block is fitted into the opening on the upper surface of the rising portion 3, and the adjustment cam 11 is inserted into the operation window 24.

At this time, if the adjusting cam 11 is first inserted into the operation window 24, the entire assembled body can be smoothly mounted in the rising portion 3.

When the assembled body is mounted in the groove in the rising portion 3, the holder 18 is stably held by friction while being sandwiched between both side surfaces of the rising portion 3. By forming a small protrusion (not shown) on the side surface and crushing the protrusion when inserting the assembled body into the groove, the friction can be further increased.

In the adjusting device according to the present invention configured as described above, the cam block 1 having the adjusting cam 11
Numerals 7 have both ends rotatably fitted to the opening on the upper surface of the rising portion 3 and the support shaft hole 22 of the holder, respectively, and the engaging portion 9 is exposed on the upper surface of the rising portion 3.

When the engaging portion is rotated in the left or right direction by a tool such as a screwdriver, the cam block 17 rotates intermittently by 45 degrees with a click feeling.

Therefore, based on the angular position of the adjusting cam 11 shown in FIG. 4B, the reference angular position of the guard arm 4 is changed in steps of plus or minus as shown in FIGS. 4C and 4A. Can be done.

At this time, the ingress and egress of the adjusting cam 11 for pushing the side edge of the guard arm 4 can be visually checked with the naked eye, so that the operator can immediately understand the principle of the adjustment and can easily and safely refer to the guard arm reference. Position adjustment can be performed.

In the illustrated embodiment, the dimensions of the various members are set so that the adjustment can be made ± 1.5 mm in terms of the movement of the tip of the guard arm 4. The reference position of the arm can be adjusted.

In practicing the present invention,
The present invention is not limited to the illustrated embodiment, and can be implemented with various modifications.

For example, it is a matter of course that a click device including a normal click ball and a spring can be employed in addition to a click device using a set of two spring plates and an octagonal prism.

[0042]

As is apparent from the above description, according to the present invention, a rectangular plate parallel to the strike plate is cut obliquely to form an inclined side, and the inclined side, the short side of the rectangle, and An adjustment cam that sets the reference position of the guard arm by joining the long sides to the side edges of the guard arm respectively,
Since these adjustment angle positions are defined by the click device, it is possible to obtain an adjustment device which has a necessary and sufficient adjustment allowance, and whose structure and adjustment operation are simple.

Further, since the corner of the adjusting cam facing the inclined side is formed in an arc shape, even if the adjusting cam is rotated, the corner does not interfere with other members, so that the adjusting cam is narrow. There are various effects such as being able to be incorporated in a space.

[Brief description of the drawings]

FIG. 1 is a front view of a guard arm device incorporating an adjusting device according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing a configuration of an adjusting device according to an embodiment of the present invention by developing parts.

FIG. 4 is an enlarged partial cross-sectional front view for explaining the operation of the adjusting device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 strike plate 3 rising portion 4 guard arm 6 guard arm engaging rod 7 engaging hole 9 engaging portion 11 adjusting cam 12 short side 13 long side 14 inclined side 15 octagonal cross section 16 support shaft 17 cam block 18 holder 19 square pole DESCRIPTION OF SYMBOLS 21 Bridge plate 22 Support hole 23 Spring plate 24 Operation window

Claims (1)

[Claims] 1. A corner portion of a rectangular plate parallel to a strike plate attached to a door frame is formed in an arc shape, and an engagement portion with a tool is formed on a surface of the corner portion. The other corner opposite to the one corner is cut obliquely to form oblique sides that obliquely intersect with the short and long sides of the rectangle at an angle interval of 135 degrees, respectively, and the center of the arc of the one corner is formed. The adjustment cam has an adjustment value that is the difference between the lengths of the perpendiculars drawn down to the short side, inclined side and long side of the rectangle. On the other hand, one end is swingably supported by the strike plate and the other end is a guard arm. The adjustment cam is rotatably supported around the center of the arc near the one side edge of the guard arm having an engagement hole for engaging with the engagement rod. No click device shall be provided to elastically maintain the angular position of the side, inclined side and long side toward the side edge of the guard arm. Device for adjusting the reference position of the guard arm in a guard lock.