JP3347098B2 - Door guard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door guard for holding a door at a predetermined half-open position.

[0002]

2. Description of the Related Art An example of a conventional door guard of this type is disclosed in Japanese Utility Model Publication No. 4-54286. This door guard holds the door at a predetermined half-open position by locking a rotating lever rotatably provided on the door to a receiving member provided on the frame. Is restrained at a locked position or a released position by a restraining force of a predetermined magnitude by a position regulating mechanism having a first spring. Then, when the door is opened and rotated from the closed position while the rotating lever is rotated to the locking position, the rotating lever is slightly rotated so as to be disengaged from the locking position. When the door is further opened and rotated to the predetermined half-open position, the rotation lever deviated by a predetermined angle from the locking position is rotated toward the locking position by the second spring. Then, the tip of the rotating lever is locked to the receiving member. As a result, the door is held at the predetermined half-open position. In a state where the rotation lever is located at the release position, the door can be freely opened and closed without the rotation lever being locked by the receiving member.

[0003]

In the above-mentioned conventional door guard, the first spring for restraining the rotating lever to the locked position or the unlocked position, and the rotating lever released from the locked position are rotated to the locked position side. Two springs are used, with a second spring to move. Therefore, there has been a problem that the configuration becomes complicated, the number of parts increases, and the manufacturing cost increases.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a receiving member fixed to a frame and a base end.
A pivot shaft is provided on the portion so as to be non- rotatable, and a pivot lever rotatably supported via the pivot shaft on a door rotatably provided on the frame, the frame and the pivot provided between the lever, the pivoting lever when located in a specific locked position, and when they are located at a predetermined release position, a predetermined rotation of the rotating lever magnitude of A position regulating mechanism having first urging means for restraining the door with force, and a door provided between the frame and the rotating lever, wherein the door is moved to a predetermined position while the rotating lever is rotated to the locking position. When the door is opened and rotated to just before the half-open position, the turning lever is turned so as to deviate from the locking position by a predetermined angle with the turning of the door, and the door is turned to the half-open position. A forced rotation mechanism that allows the rotation lever to rotate toward the locking position. The <br/> the pivot lever is pivoted to a position deviated by a predetermined angle from the locked position by the forced rotation mechanism is rotated into the locked position side, the receiving member to the rotating lever and a second biasing means engaged, in door Guard be held in the half-open position the door by allowing the pivoting lever engaged with the receiving member, the position regulating portion, shaft the times And the first
Biasing means, and the outer peripheral surface of the rotation shaft
A pair of first position restricting portions disposed 180 ° apart from each other
Disposed between the pair of first position regulating portions, and
A pair of the rotary shafts are disposed at 180 degrees apart in the circumferential direction.
A second position regulating portion, wherein the first biasing means is provided.
However, a pair of the rotating shaft is sandwiched from both sides in the radial direction.
A pair of plate portions, wherein the rotating lever has the
When in the locked position, the pair of first positions
The above rotation is caused by pressing contact with the
The lever is locked in the locked position, and the rotating lever is
When it is located at the release position, the second position regulation is performed.
Parts and press the rotating lever to the release position.
And the pair of plate portions is
Is a predetermined angle from the locked position by the forcible rotation mechanism.
When it is turned to a position that is only
Each one of the pair of first position regulating portions in the circumferential direction of the shaft.
Lock the rotating lever by pressing each end.
And is configured to be rotationally biased to the position side.
The first urging means is also used as the second urging means.
It is characterized by having.

[0005] In this case, the pair of first position regulating portions is
It is constituted by a pair of first flat portions parallel to each other,
The pair of second position regulating portions is a pair of second parallel
It is desirable to be constituted by a plane part . The forced turning mechanism, the receiving has a forced rotating unit provided in the member, the forced turning portion close to the door the pivot lever in a state of being rotated to the locked position Open rotation from position
It is desirable that when the door is brought into contact with the rotating lever, the rotating lever is rotated so as to be disengaged from the locked position with the opening rotation of the door. The receiving member is provided with an engaging portion arranged in the opening and closing direction of the door with respect to the forcible rotating portion, and the rotating lever of the rotating lever is provided between the engaging portion and the forcible rotating portion. It is desirable that the turning lever be locked to the receiving member when the leading end enters.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, the door guard G is a rectangular door frame (frame).
A for maintaining a door B whose one side is rotatably attached to an opening on the outdoor O side of A at a predetermined half-open position shown in FIG. 1, a support member 2 attached to a free end of a door B, and a rotation lever 3 provided on the support member 2 so as to be rotatable in a horizontal direction about a base end.

The support member 2 is formed by bending a metal plate. As shown in FIG.
1, 21. The fixing plate portions 21 and 21 are fixed to a surface of the door B facing the room I by screws 61 (see FIG. 2). Supporting plate portions 22, 22 which stand in the horizontal direction toward the room I and are vertically opposed to each other are formed at the ends of the fixed plate portions 21, 21 adjacent to each other. Between the support plate portions 22, a holding plate portion 23 is formed parallel to the fixed plate portion 21 and slightly away from the fixed plate portion 21 toward the room I side.

As shown in FIG. 6, a leaf spring (first spring) 4 is clamped and fixed by the clamping plate portion 23 of the support member 2 and the door B. That is, as shown in FIG. 7, the leaf spring 4 includes a vertically extending semi-circular connecting portion 41 and a pair of parallel plates extending from both sides of the connecting portion 41 toward the outdoor O side in parallel with each other. Parts 42, 42 and each parallel plate part 42,
The leg plate portions 43 and 44 are bent at right angles in a direction away from each other from the end portion 42. As shown in FIG. 6, the parallel plate portions 42, 42 are restricted by the restriction holes 23 of the holding plate portion 23 until the leg plate portions 43, 44 abut against the holding plate portion 23.
a from the outdoor O side. And the holding plate part 2
3 and a screw 62 screwed into the door B through the leg plate portion 44
By tightening, the leg plate portions 43 and 44 are clamped and fixed by the door B and the clamping plate portion 23.

As shown in FIG. 7, the support plate portions 22, 2
2 have support holes 22a, 22a whose axes are directed vertically.
Are formed respectively. Both ends of the rotating shaft 5 are fitted in the support holes 22a, 22a. In this case, both ends of the rotating shaft 5 that are fitted to the support holes 22a have a circular cross section, and are rotatably fitted to the support holes 22a. However, as shown in FIGS.
An intermediate portion located between the fitting portions of the support holes 22a, 22a is a rotation restricting portion 51 having a non-circular cross section. The rotation restricting portion 51 has a substantially parallelogram shape, and has outer peripheral surfaces having first flat portions (first position restricting portions) 52 and 52 and second flat portions (second position restricting portions). ) 53, 53 are formed. Circular arcs that are in smooth contact with one end of the first flat portion 52 and the second flat portion 53 and between the other end of the first flat portion 52 and the flat portion 53 Part 5
4, 55 are respectively formed.

The first flat portions 52 are parallel to each other, and are arranged 180 ° apart in the circumferential direction of the rotation shaft 5. The second flat portions 53 are also parallel to each other, and are arranged 180 ° apart in the circumferential direction of the rotation shaft 5. Moreover, the first flat portions 52 and the second flat portions 53 are alternately formed in the circumferential direction of the rotating shaft 5 so as to be located between each other.

The rotation restricting portion 51 of the rotation shaft 5 vertically passes through a central portion between the parallel plate portions 42 of the leaf spring 4.
The external dimension of the cross section of the rotation restricting portion 51 is larger than the interval between the parallel plate portions 42 in any part. On the other hand, the interval between the one end portions of the parallel plate portions 42, 42 is regulated to be constant by the connecting portion 41, and the interval between the other end portions is regulated to be constant by the regulation hole 23a. Therefore,
When the rotation restricting portion 51 is inserted between the parallel plate portions 42, 42,
The central portions of the parallel plate portions 42 are elastically deformed so as to be separated from each other. As a result, the parallel plate portions 42, 42 sandwich the rotation restricting portion 51 from both sides. Details of this point will be further described later.

As shown in FIGS. 1 to 5, the rotating lever 3 is composed of a pair of arms 31 and 3 which are vertically opposed to each other.
1 and a semicircular connecting portion 32 for connecting one end of the pair of arms 31 and 31 to each other, and has a slender U-shape as a whole. The other ends of the arms 31, 31 (the base end of the rotating lever 3) are non-rotatably connected to the rotating shaft 5. Therefore, the rotation lever 3 is supported by the support member 2 so as to be freely rotatable about the rotation shaft 5 in the horizontal direction. When the rotation lever 3 rotates, the rotation shaft 5 also rotates.

As shown in FIG. 1, when the pivot lever 3 is pivoted to a locked position in which the longitudinal direction thereof is directed substantially perpendicular to the door B, and as shown in FIG. 3
Is rotated by the position restricting mechanism having the leaf spring 4 and the rotating shaft 5 when it is rotated to the release position where it comes into contact with a predetermined force.

That is, when the rotating lever 3 is in the locked position, as shown in FIG. 10, the parallel plate portions 42, 42 of the leaf spring 4 cause the first flat portions 52, 52, respectively. As a result, the rotation shaft 5 is restrained (positionally fixed so as not to rotate) by a force of a predetermined magnitude, and the rotation lever 3 is further restrained to the locked position. On the other hand, when the rotating lever 3 is located at the release position, the rotating shaft 5 is rotated substantially 90 ° from the locked position, and as shown in FIG.
2 and 42 come into contact with the second flat portions 53 and 53. In this case, the first flat portion 52 and the second flat portion 53
Is smaller than 90 °, the parallel plate portions 42,
42 is one end of the second flat portion 53 (an arc portion 54)
Side end). As a result, the leaf spring 4 biases the rotating shaft 5 in the direction of the arrow in FIG.
The tip of the rotating lever 3 is abutted against the door B by the rotating biasing force, and is maintained at the abutted position, that is, the release position.

As for the release position of the rotation lever 3, the rotation position when the longitudinal direction thereof is parallel to the door B may be the release position. In this case, when the rotating lever 3 is rotated to the release position, the parallel plate portions 42, 42 may abut on both ends of the second flat portions 53, 53, respectively. Note that the rotating lever 3 restricted to the locked position or the released position can be rotated by applying a force greater than the urging force of the leaf spring 4 to the rotating lever 3.

When the turning lever 3 is turned to the release position, the door B can be freely opened and closed and turned. On the other hand, when the turning lever 3 is turned to the locking position, the door B can be opened and closed. When B is rotated from the closed position to a predetermined half-open position, the rotating lever 3 is locked to the receiving member 1. Thereby door B
Are held in the half-open position. Hereinafter, this point will be described.

As shown in FIGS. 1 to 5, the receiving member 1 comprises:
It has a fixed plate 11 and an engagement shaft (engaging portion) 12. The fixing plate 11 is fixed to an inner surface of one side of the door frame A by a screw 63. The engagement shaft 12 is attached to the fixed plate 11 by the rotation lever 3.
A shaft portion 12a standing and fixed to the side,
and a head 12b formed at the distal end of a. The head 12b is, as shown in FIG. 1 and FIG.
In the closed state, the pivotal lever 3 is pivoted to the locking position and the pivotal lever is pivoted to the release position in both cases, the base ends of the pair of arms 31 of the pivoting lever 3. It is arranged so that it may intervene.

As shown in FIGS. 3 and 5, when the rotation lever 3 is located at the release position, the interior I side of the receiving member 1 including the head 12b is open,
Even when the door 3 is opened and rotated, the rotation lever 3 does not engage with the receiving member 1. Therefore, the door 3 can be freely opened and closed and rotated.

As shown in FIGS. 1, 2 and 4, on each side of the arms 31, 31 on the side of the door frame A, an engagement plate 33 projecting from the arms 31, 31 so as to approach each other. , 33 are formed. When the rotating lever 3 is rotated to the locked position, the engaging plate portions 33 are located slightly closer to the door frame A than the head 12b. In addition, the interval between the engaging plate portions 33, 33 is larger than the outer diameter of the shaft portion 12a and the head portion 12b
Is smaller than the outer diameter of Therefore, when the door B is opened and rotated from the closed position while the rotation lever 3 is rotated to the locked position, the shaft portion 12a enters between the engagement plate portions 33, 33, and the head portion 12b is moved to the engagement plate portion. 33, 33 are opposed. As a result, the rotation of the rotation lever 3 from the locked position to the release position is prevented by the head 12b abutting on the engagement plate 33. Of course, the rotation from the locking position to the side opposite to the release position is prevented by the rotation lever 3 abutting against the receiving member 1. Therefore, the rotation lever 3 does not largely deviate from the locked position.

When the rotating lever 3 is rotated to the locked position, it is held at the locked position by the position regulating mechanism including the leaf spring 4 and the rotating shaft 5, so that the rotating lever 3 is at the release position side. It is not always necessary to prevent the rotation to the right by the engagement plate portions 33, 33 and the head portion 12b of the engagement shaft 12.

As shown in FIGS. 1 and 6, the end of the fixing plate 11 of the receiving member 1 on the indoor I side is provided with a rotating lever 3.
Forced rotation part (forced rotation mechanism) 11a standing toward the side
Is erected. When the door B is located at the closed position and the rotating lever 3 is located at the locked position, the forcibly rotating portion 11a is arranged such that the distal end portion substantially contacts the engagement plate portion 33. Here, since the rotating lever 3 is disposed on the free end side of the door B and is substantially orthogonal to the door B in the locked position, as shown in FIG. The front end portion of the rotation lever 3 approaches the receiving member 1 with the rotation of the door B, and abuts on the front end surface of the forced rotation portion 11a. Therefore, when the door B is further opened and rotated, the turning lever 3 is forcibly turned from the locked position to the release position by the forcible turning portion 11a. Then, as shown in FIG. 12, the parallel plate portions 42, 42 of the leaf spring 4 come into contact with only one end portions (end portions on the side of the arc portion 54) of the second flat portions 53, 53, and rotate. The shaft 5 is rotationally urged by the leaf spring 4 in the direction of the arrow (the direction from the release position side to the lock position side), and the rotational lever 3 is rotationally urged in the same direction.

When the door B is opened and rotated to a predetermined half-open position shown in FIG.
Moves to the outdoor O side with respect to the forced rotation unit 11a and comes off therefrom. As a result, the rotation lever 3 can rotate from the release position side to the lock position side. In addition, at this time, the parallel plate portions 42 of the plate spring 4 urge the rotating shaft 5 in the direction of the arrow in FIG. Therefore, the turning lever 3 is turned to the locking position side. Then, when the rotating lever 3 is rotated until it comes into contact with the fixed plate 11 of the receiving member 1 or is rotated to the locked position, the connecting portion 32 enters between the head portion 12b and the forced rotating portion 11a. Here, the interval between the head 12b and the forcibly rotating portion 11a is set to be substantially the same as the thickness of the connecting portion 32. Therefore, when the connecting portion 32 enters between the head portion 12b and the compulsory rotating portion 11a, the rotating lever 3 is locked by the receiving member 1 and cannot move in the indoor and outdoor directions. As a result, the door B is held at the predetermined half-open position.

To release the locked state of the rotating lever 3 with respect to the receiving member 1, the rotating lever 3 is rotated toward the release position against the urging force of the leaf spring 4. In this case, the engagement plate 33 is brought into contact with the head 12b or rotated to a position slightly before the head 12b. Then, the connecting portion 32 is moved to the forcibly rotating portion 1.
Moving from the tip of 1a to the release position side, the locked state of both is released. As a result, the rotating lever 3 can move toward the room I, and the door B can be closed and rotated. When the door B is rotated to the closed position, the head portion 12b moves to the outdoor O side with respect to the engagement plate portion 33, and their engagement state is released. Therefore, the rotation lever 3 can rotate to the release position side.

In the door guard 1 constructed as described above, the leaf spring 4 for restraining the pivoting lever 3 between the locking position and the releasing position locks the pivoting lever 3 when the door is pivoted to a predetermined half-open position. It is made to rotate to the position side.
That is, the plate spring 4 is used also as the first urging means for restraining the rotating lever 3 and the second urging means for returning the rotating lever 3 to the locking position. Therefore, the number of the urging means can be reduced, and the structure can be simplified and the manufacturing cost can be reduced accordingly. Further, since the forcibly rotating portion 11a is also used as a member for locking the rotating lever 3 to the receiving member 1, the structure can be further simplified and the manufacturing cost can be further reduced.

It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately changed. For example, in the above embodiment, the rotating arm 3 is
1a, the door B is forcibly rotated from the locked position to the release position with the opening rotation of the door B, but may be rotated from the locked position to the side opposite to the unlocked position.

[0026]

As described above, according to the present invention, the number of urging means can be reduced as compared with the conventional door guard, thereby simplifying the structure and reducing the manufacturing cost. Is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention in a state where a rotation lever is rotated to a locking position.

FIG. 2 is a view as viewed from an arrow X in FIG. 1;

FIG. 3 is a plan view of the same embodiment, showing a state in which a rotation lever is rotated to a release position.

FIG. 4 is a cross-sectional view taken along line YY of FIG.

FIG. 5 is a partially omitted X arrow view of FIG. 3;

FIG. 6 is an enlarged sectional view taken along line XX of FIG. 2;

FIG. 7 is an exploded perspective view showing a support member, a leaf spring, and a connection shaft according to the embodiment of the present invention.

FIG. 8 is a plan view showing a state in which the door is turned to just before a predetermined half-open position with the turning lever turned to the locking position.

FIG. 9 is a plan view showing a state when the door is turned to a predetermined half-open position.

FIG. 10 is an enlarged cross-sectional view illustrating a relationship between a leaf spring and a connection shaft when the rotation lever is rotated to a locking position.

FIG. 11 is an enlarged sectional view showing a relationship between a leaf spring and a connection shaft when the rotation lever is rotated to a release position.

FIG. 12 is an enlarged cross-sectional view showing a relationship between a leaf spring and a connection shaft when the door is turned to just before a predetermined half-open position with the turning lever turned to the locked position.

[Explanation of symbols]

 Reference Signs List A Door frame (body) B Door 1 Receiving member 3 Rotating lever 4 Leaf spring (first biasing means) 5 Rotating shaft 11a Forced rotating portion (of forced rotating mechanism) 12 Engagement shaft (engaged portion) ) 42 parallel plate part 52 first plane part (first position restriction part) 53 second plane part (second position restriction part)

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E05C 17/06 E05B 65/06

Claims (4)

(57) [Claims] 1. A receiving member fixed to a skeleton and a base end portion
A rotation shaft that is non-rotatably provided, a rotation lever rotatably supported via the rotation shaft on a door that is rotatably provided on the skeleton, and the skeleton and the rotation lever. When the rotation lever is located at a predetermined locking position and when it is located at a predetermined release position, the rotation of the rotation lever is performed with a predetermined magnitude of force. First to be restrained
A position regulating mechanism having an urging means, and provided between the frame and the rotating lever, and the door is rotated to a position just before a predetermined half-open position in a state where the rotating lever is rotated to the locking position. When the door is pivoted open, the pivot lever is pivoted so as to deviate from the lock position by a predetermined angle with the pivot of the door, and when the door is pivoted to the half-open position,
A forced rotation mechanism that allows the rotation lever to rotate toward the locking position, and the rotation lever that has been rotated to a position deviated from the locking position by a predetermined angle by the forced rotation mechanism. Second urging means for rotating to the locking position side to lock the rotating lever to the receiving member, and locking the rotating lever to the receiving member to lock the door. In the door guard that is held at the half-open position, the position restricting portion is configured to move the rotation shaft and the first bias.
Means on the outer peripheral surface of the rotating shaft in the circumferential direction.
A pair of first position regulating portions arranged 180 ° apart;
It is arranged between the pair of first position restricting portions, and
A pair of second members arranged 180 ° apart from each other in the circumferential direction of the rotation shaft.
Is provided, and the first urging means is
A pair of plate portions for holding the rotating shaft from both sides in the radial direction
The pair of plate portions has a configuration in which the rotating lever is in the locked position.
The first pair of first position regulation
The above-mentioned rotating lever is brought into contact with
In the locked position, and the rotating lever is in the released position.
When it is located at the position,
Each pressing contact makes the rotary lever stay in the release position.
Bundling, and the pair of plate portions, the rotating lever
A predetermined angle from the locked position by the forced rotation mechanism
When rotated to the off position, the
At each end of the pair of first position regulating portions in the direction
Pressing each other to move the rotating lever to the locked position side
To be biased to rotate the
A door guard, wherein the urging means is also used as the second urging means. The pair of first position restricting portions are flat with each other.
And a pair of first plane portions,
The second position regulating portion is formed on a pair of second flat portions parallel to each other.
The door guard according to claim 1, wherein the door guard is configured as follows. 3. The forced rotation mechanism has a forced rotation portion provided on the receiving member, and the forced rotation portion includes:
The pivoting lever when to open pivot the door from the closed position in a state of being rotated to the locked position, abuts on the turning lever, the said pivoting lever with the opening rotation of the door The door guard according to claim 1 , wherein the door guard is rotated so as to be out of a locked position. 4. The receiving member has an engaging portion arranged in the opening and closing direction of the door with respect to the forcibly rotating portion, and between the engaging portion and the forcibly rotating portion. 4. The door guard according to claim 3 , wherein the pivot lever is locked to the receiving member when the tip of the pivot lever enters. 5.