JP2005248551A - Door guard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door guard whose guarding arm is not released from the outside, thereby having an excellent safety. <P>SOLUTION: The door guard 1 is composed of: a receiving member 2 fixed on the door frame W side; and the arm 4 mounted on a pedestal 3 fixed onto an internal surface on the door end side of a door D and rotated between an unguarded position along the internal surface of the door D and a guarded position projected on the indoor side. In the door guard 1, the arm 4 is installed to the pedestal 3 so that a rotation and a movement in the longitudinal direction of the arm are enabled, and a projection 16 is formed to one in the opposed surfaces of the pedestal 3 and the arm 4 and a guide hole 17, into which the projection 16 is inserted, to the other. In the door guard 1, the guide hole 17 is formed of an arcuate hole section 17a permitting the rotation between the releasing place and the guard place under the guard state of the arm 4 and an engaging hole section 17b being connected at one end section of the hole section 17a and permitting the movement in the longitudinal direction of the arm 4 by the projection 16 in a manner that the projection 16 is freely engaged and disengaged at the guard place. In the pedestal 3, a pushing means 18 pushing and moving the arm 4 at the guard place towards the indoor side is fitted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a door guard that prevents the door from being opened from the outside when the door is closed, and more particularly to a door guard that can prevent the guard state from being released from the outside.

  Conventionally, a door guard that prevents the door from being opened from the outside when the door is closed is attached to a receiving fixture fixed to the door frame side and a base fixed to the inner surface of the door side of the door. There is an arm that can be rotated between a guard position release position along the door and a guard position that protrudes indoors. It has a structure in which a guide groove that extends from the opening to the distal end side of the arm with a width that engages with the receiver and extends to the distal end side of the arm and slides to the stop position with respect to the receiver when the door is opened is formed. Yes.

The door guard described above, when the arm is in the guarded release position along the inner surface of the door,
Since there is no engagement between the arm and the receiver, the door can be opened and closed freely. When the door is closed, when the arm is in the guard position where it protrudes indoors, the opening fits outside the receiver. When the door is opened in this state, the guide groove of the arm that moves integrally with the door slides while engaging the receiver, and the end stop position of the guide groove is in contact with the receiver, and beyond that of the door This prevents the door from being opened and prevents entry from the outside (see, for example, Patent Document 1).
JP 2003-278427 A

  By the way, the conventional door guard as described above has a risk that the guard state is released even from the outside and the door is opened to enter.

  That is, in the guard state in which the door is closed and the arm is positioned at the guard position, for example, the elastic plate-like body is externally applied in a state where the door is opened and the terminal stop position of the guide groove is in contact with the receiving tool. When the door is closed as it is inserted between the arm and the door frame, the plate-like body is pinched between the door and the door frame and bends, and the resilience due to the bending directs the arm toward the release position of the guard state. The guide groove is released from the receiver and the opening faces the receiver immediately before the door is closed, so that the arm and the receiver are disengaged and pressed by the plate-like body. The arm, which is biased with elasticity, rotates toward the release position of the guard state, and thus the guard state is released, so that the door can be opened from the outside to allow entry. There is a problem.

  Accordingly, an object of the present invention is to provide a door guard that can prevent the release of the guard state from the outside in the guard state in which the door is closed and the arm is positioned at the guard position, and is excellent in safety.

  In order to solve the problems as described above, the first invention is attached to a receiving base fixed to the door frame side and a base fixed to the inner surface of the door side of the door, and is arranged along the inner surface of the door. It consists of an arm that can be rotated between a guard position release position and a guard position that protrudes indoors. Rotating the arm and its length in a door guard provided with a guide groove that extends from the opening and extends to the tip of the arm with a width that engages the receiver, and slides to the stop position with respect to the receiver when the door is opened. It is attached to the pedestal so that it can be moved in the vertical direction, and a projection is provided on one of the opposed surfaces of the pedestal and the arm, and a guide hole into which the projection is inserted is provided on the other side. Release position and guard An arc-shaped hole that allows rotation between the position and one end of the guide hole, and a protrusion that can be freely engaged and disengaged at the guard position to allow movement of the arm in the length direction. The pedestal is provided with a pressing means for pressing the arm at the guard position toward the indoor side and engaging the protrusion with the locking hole to disable the rotation of the arm. The configuration is adopted.

  Here, the receiver is formed by projecting a circular guide shaft on the mounting seat, and providing an engagement head having a larger diameter than the guide shaft at the tip of the guide shaft. The opening is formed in a width that fits the guide shaft, and the opening is sized to allow the engagement head to pass through.

  Further, the pedestal is formed by projecting a pair of upper and lower support pieces on the front surface, and the arm is formed in a U-shaped cross section with a pair of opposing walls that fit between the upper and lower support pieces and a side wall that connects them. A guide groove is provided on the side wall, and an opening between the opposing walls protruding from the end of the side wall is an opening that communicates with the guide groove.

  The arm is provided with a long hole along the length direction at the base end portion of the opposing wall, and is attached to the support piece of the pedestal with a pivot passing through the long hole. It is possible to move in the length direction within the range.

  In the pedestal, the pressing means includes a contact member that is movable with respect to the base edge of the opposing wall in a recess provided at a position corresponding to the base end of the opposing wall, and a base of the opposing wall on the contact member. It is formed with a spring that gives elasticity to press against the end, and allows the arm to rotate, and when the arm is in the guard position, it is pushed in the length direction and moves to the indoor side by the range of the long hole, The protrusion engages with the locking hole, and the arm at the guard position cannot be rotated. When the arm is pushed to the outdoor side along the length direction, the arm moves to the outdoor side within the range of the long hole. Thus, the projection is detached from the locking hole, and the arm can be rotated toward the release position. Thus, in order to return the arm at the guard position to the release position, the length of the arm is increased. And two operations to rotate while maintaining this push It has become way.

  According to a second invention, in the first invention, the locking hole portion of the guide hole has a side edge that receives the protrusion and prevents the arm from being rotated to the release position, and an excessive rotational force is applied to the arm. In some cases, a configuration is adopted in which the protrusions are inclined edges that guide the arc-shaped holes.

  3rd invention is attached to the receiving base fixed to the door frame side, and the base fixed to the inner surface of the door-end side of the door, and protrudes to the indoor side and the release position of the guard state along the inner surface of the door And an arm that can rotate between the guard position and the guard position when the door is closed. In the door guard provided with a guide groove that extends from the opening to the tip of the arm and extends to the stop position with respect to the receiving member when the door is opened, an auxiliary arm disposed along the length direction of the arm includes the arm One end of the auxiliary arm is pivoted to a position away from the center of rotation of the arm with respect to the pedestal, and an engagement bent portion is provided in the middle of the tip side of the auxiliary arm. Arm guard at the tip of the arm The engaging bends are engaged with each other to provide an engaging wall that prevents the arm from rotating. The distal end of the auxiliary arm penetrates the engaging wall, and the auxiliary arm rotates with respect to the arm. In addition, a window hole through which the engaging bent portion can pass is provided, and the auxiliary arm is constantly urged to rotate elastically in a direction in which the engaging bent portion engages with the engaging wall. It is a thing.

  The auxiliary arm uses a single metal wire, and is formed in a long U shape by connecting the tip of the vertical parallel rod with a connecting rod, and the base end of the vertical parallel rod is bent to the opposite side and provided on the base The engagement bent part provided on the tip side of the vertical parallel rod is bent at a right angle to the side opposite to the side wall of the arm with respect to the tip side. It is formed by bending an engaging piece and an inclined piece approaching from the tip of the engaging piece toward the side wall of the arm.

  When the arm is in the guard position, the engagement bent portion provided on the auxiliary arm is located inside the engagement wall, and the arm and the auxiliary arm have different fulcrum positions during rotation. When trying to move, the engagement wall engages with the engagement bent portion to prevent the arm from rotating, and the arm guard position is maintained.

  When the arm is in the release position, the tip of the auxiliary arm is moved to the side wall of the arm with the fingertip and moved in the release direction with the engagement bent portion of the auxiliary arm facing the window hole. The auxiliary arm rotates together with the arm. At this time, the auxiliary arm differs from the arm in the position of the fulcrum at the time of rotation. The engagement piece of the engagement bent portion passes through the window hole and moves to the tip side of the arm, thereby allowing the arm to rotate.

  In addition, the means for constantly urging the auxiliary arm in the direction in which the bent bending portion engages with the engaging wall is configured such that the surroundings of the mounting holes are opposite to each other on the opposing surfaces of the both side mounting pieces provided on the pedestal. By making the inclined surface and pivoting to the mounting hole in a state where the base end side of the vertical parallel rod of the auxiliary arm is compressed in the width direction, the elasticity that expands in the vertical parallel rod is accumulated. The action of the side expansion elasticity causes the auxiliary arm to rotate in the direction in which the engagement bent portion engages with the engagement wall.

  As another means for urging the rotational elasticity, a structure in which a spring is contracted between the auxiliary arm and the arm can be used.

  According to a fourth invention, in the first to third inventions, a plurality of mounting holes are provided in the pedestal, and at least one mounting hole is disposed at a position overlapping an extension line in the length direction of the arm that is set as a guard position. And the structure currently formed in the counterbore which sinks the head of an attachment screw is employ | adopted.

  According to the first invention, when the arm is set to the guard position, the protrusion engages with the locking hole and the arm cannot be rotated, and the arm length is required to return the arm at the guard position to the release position. As it is necessary to open the door in a direction and rotate it while maintaining this push-in, it is necessary to open the door a little and insert a plate-like body from the outside to close the door in the guard state. However, the arm does not rotate, and therefore, the arm cannot be returned to the release position from the outside of the room, so that an intruder can be reliably prevented and safety is excellent.

  According to the second aspect of the invention, since the side edge that receives the protrusion at the locking hole portion of the guide hole and prevents the arm from rotating to the release position is an inclined edge, the arm at the guard position is placed at the release position. When an excessive rotational force is applied, the projection and the locking hole are released and the projection is guided to the arc-shaped hole. The durability can be improved without being damaged.

  According to the third invention, an engagement bent portion is provided in the middle of the distal end side of the auxiliary arm arranged along the length direction of the arm, and the engagement bent portion is engaged with the distal end portion of the arm at the guard position of the arm. In addition, an engagement wall for preventing the rotation of the arm is provided, the distal end side of the auxiliary arm passes through the engagement wall, and the rotation of the auxiliary arm is restricted to a certain range with respect to the arm. A window hole through which the engagement bent portion can pass is provided, and the auxiliary arm is constantly urged to rotate in the direction in which the engagement bend portion engages with the engagement wall. In order to return the arm at the guard position to the release position by engaging the bent portion with the engaging wall and returning the arm at the guard position to the release position, the operation of moving the engaging bent portion of the auxiliary arm away from the engaging wall, and the arm Requires two operations to rotate the Even if the door is opened a little and a pair of plates is inserted from the outside of the door and the door is closed, the arm does not rotate, so the arm cannot be returned to the release position from the outside of the door, thus ensuring the intruder. It will be excellent in safety that can be prevented.

  Further, according to the fourth invention, at least one mounting hole provided in the pedestal is disposed at a position overlapping with an extension line in the longitudinal direction of the arm at the guard position, and the head of the mounting screw is depressed. Because it is formed in the counterbore, even if you open the door with the arm in the guard position and try to remove the mounting screw of the pedestal from the gap with the door frame with a screwdriver, the head side shaft of the screw screwed into the mounting hole The arm will be positioned in the direction, so the arm will be in the way and you will not be able to remove the screw, and the screw head will sink to the bottom of the counterbore, so the driver will be inserted further It becomes difficult and it becomes impossible to remove the pedestal, so that the safety can be improved.

  It consists of a holder fixed to the door frame side, a base fixed to the inner surface of the door side of the door, and an arm attached to it, so that the arm can be rotated and moved in its length direction Mounted on the pedestal, provided with a projection on one side of the pedestal and the arm facing each other, and a guide hole into which the projection is inserted on the other side. A locking hole that allows movement in the vertical direction is provided, and the arm at the guard position is pressed and moved toward the indoor side on the pedestal, and the protrusion is engaged with the locking hole to rotate the arm. A pressing means for disabling is provided.

  As shown in FIGS. 1 to 6, the door guard 1 of the first embodiment includes a receiving member 2 fixed to the door frame W side, a pedestal 3 fixed to the inner surface of the door D on the door end side, and the pedestal 3. And the arm 4 that can rotate between a guard position releasing position along the inner surface of the door D and a guard position protruding to the indoor side. A circular guide shaft 6 is projected from the mounting seat 5 to be fixed in the above, and an engagement head 7 having a larger diameter than the guide shaft 6 is provided at the tip of the guide shaft 6.

  The pedestal 3 has a long plate shape with a plurality of mounting holes 8 for the door D, and is formed by projecting a pair of upper and lower support pieces 9 on the front surface thereof in a facing manner.

  The arm 4 attached to the pedestal 3 is formed in a U-shaped cross section with a pair of opposing walls 10 that are accommodated between the upper and lower support pieces 9 and a side wall 11 that connects the opposing walls 10. An opening 12 that is inserted into and removed from the receiver 2 and a guide groove 13 that extends from the opening 12 to the tip of the arm 4 and slides to the stop position with respect to the receiver 2 when the door is opened are provided. Yes.

  The guide groove 13 is provided along the length direction of the side wall 11, and an opening 12 communicating with the guide groove 13 is formed between the opposing walls 10 protruding from the base end portion of the side wall 11. The width is smaller than the outer diameter of the engagement head 7 in conformity with the guide shaft 6, and the opening 12 is sized to allow the engagement head 7 to pass therethrough.

  In FIG. 1 to FIG. 4, the arm 4 is attached to the pedestal 3 with a long hole 14 extending in the length direction at the base end of the opposing wall 10 in the arm 4, and a pivot 15 extending through the long hole 14. The arm 4 is attached to the support piece 9 of the base 3 so that the arm 4 can rotate around the pivot 15 and move in the length direction within the range of the long hole 14.

  On the opposing surface of the support piece 9 and the arm 4 of the pedestal 3, a square-shaped protrusion 16 is provided at a position slightly closer to the distal end side along the length direction from the pivot 15 of the arm 4. A guide hole 17 into which 16 is inserted is provided, and this guide hole 17 is formed so as to be coaxial with the pivot 15 so as to allow the arm 4 to rotate between the guard-released position and the guard position. The arc-shaped hole portion 17a is connected to one end of the arc-shaped hole portion 17a so as to bend in the outer diameter direction, and the projection 16 can be freely engaged and disengaged with the arm 4 in the guard position. Is formed with a locking hole 17b that allows movement to the pedestal 3, and the arm 4 at the guard position is pressed and moved toward the indoor side, and the protrusion 16 is engaged with the locking hole 17b. And a pressing means 18 for disabling the rotation of the arm 4 is provided. It is.

  The locking hole 17b of the guide hole 17 has a side edge that receives the protrusion 16 and prevents the arm 4 from rotating to the release position, and the protrusion 16 has an arc shape when an excessive rotational force is applied to the arm 4. It is formed on the inclined edge 17c that leads to the hole 17a, and prevents the protrusion 16 and the locking hole 17b from being damaged due to excessive rotational force, thereby improving the durability.

  As shown in FIG. 7, the protrusion 16 and the guide hole 17 form a guide hole 17 in the opposing wall 10 of the arm 4, and a protrusion 16 that is fixedly disposed on the support piece 9 of the base 3. The hole 17 may be rotated.

  As shown in FIGS. 5 and 6, the pressing means 18 is movable with respect to the base edge of the opposing wall 10 in the recess 19 provided at a position corresponding to the base end of the opposing wall 10 in the pedestal 3. The abutting member 20 and a spring 21 contracted so as to give elasticity to the abutting member 20 so as to be pressed against the proximal end of the opposing wall 10, the arm being pressed against the proximal edge of the opposing wall 10. 4 is allowed to move, and when the arm 4 is set to the guard position, it is pushed in the length direction and moves inwardly within the range of the long hole 14, and the protrusion 16 engages with the locking hole 17b. Then, the arm 4 at the guard position cannot be turned.

  As shown in FIG. 5, when the concave portion 22 is provided on the front surface of the abutting member 20 and the outer peripheral edge of the opposing wall 10 of the arm 4 that contacts the abutting member 20 at the base end portion is in the guard position or the release position. A small protrusion 23 that fits into the recess 22 is provided so that the phases of the guard position and the release position of the arm 4 are elastically and stably maintained.

  FIG. 8 shows another structure in which the arm 4 is rotated, moved in the longitudinal direction at the guard position, and the rotation is stopped when the arm 4 is attached to the pedestal 3. The mounting shaft 24 whose both surfaces are cut is fixed so that the cut surface is arranged along the length direction of the arm 4 at the guard position, and is attached to the base end portion of the opposing wall 10 of the arm 4 on the mounting shaft 24. A circular mounting hole 25 that fits and a locking hole 17b that fits between the cut surfaces of the mounting shaft 24 are provided around the mounting hole 25, and the arm 4 is rotated by the mounting hole 25 on the mounting shaft 24 of the base 3. When the mounting is possible and the arm 4 is set to the guard position, the locking hole portion 17b fits into the mounting shaft 24 so that the arm 4 is prevented from rotating.

  The door guard 1 according to the first embodiment is configured as described above, and a holder 2 is fixed to the door frame W, and a pedestal is placed on the door tip side on the interior surface of the door D at a height position corresponding to the holder 2. 3 is fixed with a screw inserted through the mounting hole 8, and FIGS. 1 and 2 show a state in which the arm 4 is in a guard release position along the surface of the door D, and the arm 4 is separated from the support 2. The door D can be opened and closed freely.

  In order to set the arm 4 in the release position to the guard position with the door D closed, the arm 4 may be rotated approximately 90 degrees indoors. As shown in FIG. 15, the projection 16 provided on the arm 4 moves in the arc-shaped hole 17 a of the guide hole 17, and when the arm 4 is in a phase protruding to the indoor side, the opening provided on the arm 4 The arm 4, which has the portion 12 fitted on the engagement head 7 of the receiver 2, and at the same time the protrusion 16 faces the locking hole portion 17 b and is pressed in the length direction by the pressing means 18, The protrusion 16 engages in the locking hole 17b by moving inwardly by the range, so that the arm 4 is held in a state in which it cannot rotate.

  When the door D is opened while the arm 4 is in the guard position, the arm 4 that moves together with the door D is engaged with the engagement head 7 by the guide groove 13 being externally fitted to the guide shaft 6 of the receiver 2. However, the door D is prevented from being further opened at the position where the terminal stop position of the guide groove 13 is in contact with the receiving member 2, and the entry from the outside is prevented.

  Here, as in the prior art, even if the door D is opened with the arm 4 in the guard position, and the plate A is inserted from the outdoor side and the door D is closed as shown in FIG. The elastically pressed arm 4 does not rotate, and therefore the arm 4 cannot be returned to the release position from the outdoor side, and an intruder can be reliably prevented.

  Further, when the arm 4 at the guard position is returned to the release position, the opening 12 faces the receiving member 2 with the door D closed. First, the arm 4 is moved along the length direction with the long hole 14. In this range, it is pushed to the outside of the room, and in this pushed state, it is turned to the release side.

  When the arm 4 is pushed to the outdoor side along the length direction, the arm 16 moves to the outdoor side within the range of the long hole 14, and the projection 16 provided on the arm 4 is detached from the locking hole 17b. The arm 4 can be turned toward the arm. Thus, in order to return the arm 4 at the guard position to the release position, the arm 4 is pushed in the length direction and the push is maintained while keeping the pushing. Two operations are required.

  9 to 13 show the door guard of the second embodiment. In addition, the same code | symbol is used for the same part as 1st Example.

  The door guard 1a of the second embodiment includes a support 2 fixed to the door frame W side, a base 3 fixed to the inner surface of the door D side of the door D, and an inner surface of the door D attached to the base 3 The arm 4 that can be rotated between the guard position release position along the guard and the guard position that protrudes indoors, and the arm 4 is attached to the base 3 so as to be rotatable in the same direction as the arm 4. The support arm 2 has the same structure as that of the first embodiment.

  The pedestal has a plate-like shape with a plurality of mounting holes 8 for the door D, and is formed by projecting a pair of upper and lower support pieces 9 on the front surface thereof. A pair of opposing walls 10 that are accommodated between the support pieces 9 and a side wall 11 that connects the pair of opposing walls 10 are formed in a U-shaped cross section. There is provided a guide groove 13 that extends from the opening 12 to the tip of the arm 4 with a width that engages the receiving portion 2 and extends to the tip of the arm 4 and slides to the stopping position with respect to the receiving portion 2 when the door is opened. Yes.

  The mounting structure of the arm 4 with respect to the pedestal 3 is such that the base end portion of the opposing wall 10 in the arm 4 is attached to the support piece 9 of the pedestal 3 by the pivot 32, and the arm 4 can be rotated around the pivot 32. It has become.

  The auxiliary arm 31 is pivoted at a position where the base end side of the auxiliary arm 31 is offset from the center of rotation of the arm 4 toward the suspension side of the door D with respect to the pedestal 3 so as to rotate in the same direction as the arm 4. An engagement bent portion 33 is provided in the middle of the distal end side of the auxiliary arm 31, and the engagement bent portion 33 engages with the distal end portion of the arm 4 at a guard position of the arm 4 to prevent the arm 4 from rotating. The engaging wall 34 is provided, the distal end side of the auxiliary arm 31 passes through the engaging wall 34, and the rotation of the auxiliary arm 31 with respect to the arm 4 is restricted to a certain range, and the engaging bent portion A window hole 35 through which 33 can pass is provided, and the auxiliary arm 31 is always urged to rotate elastically in a direction in which the engaging bent portion 33 engages with the engaging wall 34.

  The auxiliary arm 31 is made of a single metal wire and is formed in a long U shape by connecting the distal ends of the upper and lower parallel rods 36 with a connection rod 37 serving as an operation piece, and the base ends of the upper and lower parallel rods 36 are opposite to each other. The base end bent portion 38 is pivoted in the mounting hole 40 of the mounting piece 39 provided on both sides of the base 3 so as to be rotatable in the same direction as the arm 4. The engagement bent portion 33 provided on the side is an engagement piece 33a that is bent at a right angle to the side opposite to the side wall 11 of the arm 4 with respect to the front end side, and from the front end of the engagement piece 33a toward the side wall 11 of the arm 4. It is formed by an inclined piece 33b that approaches.

  Means for urging the elastic elasticity in the direction in which the engaging bent portion 33 is always engaged with the engaging wall 34 to the auxiliary arm 31 is the periphery of the mounting hole 40 on the opposite surface of the both side mounting pieces 39 provided on the base 3. Are set to be inclined surfaces opposite to each other, and the base end bent portion 38 is pivotally fixed to the mounting hole 40 in a state where the base end side of the vertical parallel rod 36 of the auxiliary arm 31 is compressed in the width direction. The expansion elasticity is accumulated, and the inclined arm and the expansion elasticity on the base end side cause the auxiliary arm 31 to rotate in the direction in which the engagement bent portion 33 engages the engagement wall 34. I have to.

  FIG. 13 shows another means for urging the auxiliary arm 31 to rotate elastically in the direction in which the engagement bent portion 33 always engages with the engagement wall 34, and between the side wall 11 of the arm 4 and the auxiliary arm 31. A spring 41 for pressing the auxiliary arm 31 is contracted.

  The door guard 1a of the second embodiment is configured as described above, and the holder 2 is fixed to the door frame W, and the pedestal is placed on the door tip side on the interior surface of the door D at a height position corresponding to the holder 2. 9 and 10 show the state in which the arm 3 is in the guard release position along the surface of the door D. The arm 4 is separated from the support 2 so that the door D can be freely opened and closed. You can do it.

  With the auxiliary arm 31 in the released position, the engaging piece 33a of the engaging bent portion 33 is positioned on the distal end side of the arm 4 through the window hole 35 with respect to the engaging wall 34, and the inclined piece 33b. Is in contact with the peripheral edge of the window hole 35.

  From this state, when the door is closed and the arm 4 is rotated to the guard position, as shown in FIG. 11, the auxiliary arm 31 is different from the arm 4 and the fulcrum at the time of rotation as shown in FIG. A phase difference in the longitudinal direction is generated with respect to the engagement arm 33. The engagement piece 33a of the engagement bent portion 33 provided in the auxiliary arm 31 passes through the window hole 35 and moves to the inside of the engagement wall 34, and the engagement piece 33a. Becomes engageable with the engagement wall 34.

  When the door D is opened with the arm 4 in the guard position, the arm 4 that moves together with the door D is engaged with the engagement head 7 by the guide groove 13 being externally fitted to the guide shaft 6 of the receiver 2. However, the door D is prevented from being further opened at the position where the terminal stop position of the guide groove 13 is in contact with the receiving member 2, and the entry from the outside is prevented.

  If the arm 4 at the guard position is to be rotated to the release position side, the arm 4 is rotated by engaging the engagement wall 34 with the engagement piece 33a of the engagement bent portion 33 as shown in FIG. And the guard position of the arm 4 is held.

  Here, even if the door D is opened with the arm 4 in the guard position as in the prior art, and the plate A is inserted from the outdoor side and the door D is closed as shown in FIG. Since it is engaged with the engagement piece 33a, the arm 4 does not rotate even if it is pushed by the elasticity of the plate-like body A. Therefore, the arm 4 cannot be returned to the release position from the outdoor side, Intruders can be reliably prevented.

  Further, when the arm 4 is set to the release position, the tip end portion of the auxiliary arm 31 is moved to the side wall 11 side of the arm 4 with a fingertip, and the engagement bent portion 33 of the auxiliary arm 31 is made to face the window hole 35. In this state, the arm 4 may be rotated in the release direction, and the auxiliary arm 31 is rotated integrally with the arm 4. At this time, the auxiliary arm 31 differs from the arm 4 in the position of the fulcrum at the time of rotation. A phase difference in the length direction is generated with respect to the arm 4, and the engagement piece 33 a of the engagement bending portion 33 passes through the window hole 35 and moves to the distal end side of the arm 4, thereby allowing the arm 4 to rotate. Will do.

  In this second embodiment, a plurality of mounting holes 8 are provided in the pedestal 3, and at least one mounting hole 8 is disposed at a position overlapping the extension line in the length direction of the arm 4 at the guard position, and It is formed in a counterbore that allows the head of the mounting screw 42 to sink.

  If the structure of the mounting hole 8 as described above is adopted, even if the arm 4 is in the guard position and the door D is opened and the mounting screw 42 of the base 3 is removed from the gap with the door frame W with a screwdriver, The arm 4 is positioned in the axial direction of the head side of the mounting screw 42 screwed into the hole 8. Therefore, the arm 4 becomes an obstacle and the mounting screw 42 cannot be removed.

  In addition, since the head of the mounting screw 42 is sinking to the bottom of the counterbore, it becomes more difficult to insert the driver, and it becomes impossible to remove the pedestal 3 from the outside, thereby improving safety. Become.

  Such a structure of the mounting hole 8 is naturally applicable to the base 3 of the first embodiment described above.

The front view when the arm which shows the door guard of 1st Example exists in a cancellation | release position Cross-sectional plan view Transverse plan view when the arm showing the door guard of the first embodiment is in the guard position The cross-sectional top view when the arm which shows the door guard of 1st Example exists in a guard position, and opens a door An enlarged cross-sectional plan view showing the mounting structure of the arm to the pedestal Side view with the main part cut out (A) is an enlarged cross-sectional plan view when the arm is in the release position, showing another example of the guide holes and protrusions provided in the base and the arm, and (B) is an enlarged cross-sectional plane when the arm is in the guard position. Figure (A) is an enlarged cross-sectional plan view when the arm is in the release position, showing another example of an arm mounting structure with respect to the base, and (B) is an enlarged cross-sectional plan view when the arm is in the guard position Front view when the arm showing the door guard of the second embodiment is in the release position Cross-sectional plan view Transverse plan view when the arm showing the door guard of the second embodiment is in the guard position The cross-sectional top view when the arm which shows the door guard of 2nd Example exists in a guard position, and opens a door Cross-sectional plan view when an arm showing another example of elasticity applying means for the auxiliary arm is in the release position

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a Door guard 2 Receiver 3 Base 4 Arm 5 Mounting seat 6 Guide shaft 7 Engagement head 8 Mounting hole 9 Supporting piece 10 Opposite wall 11 Side wall 12 Opening part 13 Guide groove 14 Long hole 15 Pivot 16 Protrusion 17 Guide hole 18 Press Means 19 Recess 20 Abutting member 21 Spring 22 Recess 23 Small protrusion 24 Mounting shaft 25 Mounting hole 31 Auxiliary arm 32 Pivot 33 Engagement bending portion 34 Engagement wall 35 Window hole 36 Vertical parallel rod 37 Connection rod 38 Base end bending portion 39 Mounting piece 40 Mounting hole 41 Spring 42 Mounting screw

Claims (4)

  A receiving fixture that is fixed to the door frame side, and a guard position that is attached to the base fixed to the inner surface of the door tip side of the door, and a guard position that protrudes indoors along the inner surface of the door. When the arm is in a guarded position when the door is closed, an arm that is inserted into and removed from the receiver and a width that engages with the receiver is connected to the arm from the opening. In the door guard provided with a guide groove that extends to the tip of the door and slides to the stop position with respect to the receiving member when the door is opened, the arm is attached to the base so that the arm can be rotated and moved in the length direction. And a guide hole into which the projection is inserted on the other side of the opposite surface of the arm, and the guide hole is arcuate to allow rotation between the guard state release position and the guard position of the arm. Hole and this A locking hole portion that is connected to one end portion of the id hole and that allows the protrusion to be engaged and disengaged at the guard position to allow movement in the length direction of the arm. A door guard provided with pressing means for pressing and moving inward and engaging a protrusion with the locking hole portion to disable the rotation of the arm.   The locking hole portion of the guide hole has a side edge that receives the protrusion and prevents the arm from rotating to the release position, and an inclination that guides the protrusion to the arc-shaped hole when an excessive rotational force is applied to the arm. The door guard according to claim 1, wherein the door guard is an edge.   A receiving fixture that is fixed to the door frame side, and a guard position that is attached to the base fixed to the inner surface of the door tip side of the door, and a guard position that protrudes indoors along the inner surface of the door. When the arm is in a guarded position when the door is closed, an arm that is inserted into and removed from the receiver and a width that engages with the receiver is connected to the arm from the opening. In the door guard with a guide groove that extends long at the tip of the door and slides to the stop position with respect to the receptacle when the door is opened, the auxiliary arm arranged along the length direction of the arm rotates in the same direction as the arm. The one end side is pivoted at a position away from the center of rotation of the arm with respect to the pedestal, and an engagement bent portion is provided in the middle of the distal end side of the auxiliary arm. Engagement bending at the guard position of the arm And an engagement wall for preventing rotation of the arm is provided. The distal end side of the auxiliary arm penetrates the engagement wall, and the rotation of the auxiliary arm is restricted to a certain range with respect to the arm. The door guard is provided with a window hole through which the engagement bent portion can pass, and biased in the auxiliary arm in a direction in which the engagement bent portion is always engaged with the engagement wall.   A plurality of mounting holes are provided in the pedestal, and at least one mounting hole is disposed at a position overlapping with an extension line in the longitudinal direction of the arm at the guard position, and a counterbore hole for sinking the head of the mounting screw The door guard according to any one of claims 1 to 3, wherein the door guard is formed.

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