JP4708066B2 - Door body closing device - Google Patents

Description

  The present invention relates to a door body closing device for automatically closing a door body that is disposed in a house or the like when the door body is opened or closed.

Conventionally, there is a door body closing device in which a door body that is rotatably arranged with respect to a frame body that defines an opening of a house, etc., is decelerated immediately before closing the door body to quietly close the door body. (Patent Document 1).
As shown in FIG. 8, such an automatic door closing device (door body closing device) has a housing 101 fixed to a door, and a bracket 101 having a guide groove 101 a with which the following roller 112 is engaged and disengaged on an upper collar. A cylinder 102 filled with hydraulic oil is formed in the housing 100, and a piston 104 that is elastically urged by a spring 103 is incorporated in the cylinder 102. A check valve 105 and an oil passage hole 106 are provided in the head of the piston 104, and a rack 108 is provided on the inner wall surface of a long hole 107 formed in a substantially intermediate portion of the piston 104. In addition, a pinion shaft 110 with a pinion 109 that meshes with the rack 108 is pivotally supported on the housing 100 in a state of passing through the long hole 107, and the base end of the arm 111 is fixed to the protruding end of the pinion shaft 110, A roller 112 is pivotally attached to the tip of the arm 111. By the way, the pinion 109 is formed with one pinion tooth 109a and a pair of protrusions on the left and right sides thereof, and other parts are omitted, while the final tooth 108a of the rack 108 is on one side. When the door is opened, the arm 111 is held at a predetermined rotation angle in a state where the protruding portion of the pinion 109 and the lacking portion of the rack 108 are frictionally engaged and the spring 103 is compressed. When the door is rotated in the closing direction from such an open state, the roller 112 on the door side engages with the guide groove 101a of the bracket 101, and the friction engagement between the protrusion and the lacking portion is performed. The spring 103, which has been released and compressed, extends, and the piston 104 moves. As the piston 104 moves, the pinion 109 that meshes with the rack 108 rotates, so that the arm 111 rotates, and the roller 112 of the arm 111 rolls along the guide groove 101a to close the door. When the piston 104 moves, the hydraulic oil in the cylinder 102 acts to decelerate the movement of the piston 104, so that the door is gently closed.

However, although the automatic door closing device described above has a structure in which the housing 100 on the roller 112 side and the bracket 101 on which the roller 112 is engaged and disengaged are separately attached, the mounting operation is facilitated. The structure of the automatic door closing device itself is complicated and impractical, and therefore, there is a problem that the assembling work requires time and the above-described facilitation of the attaching work is impaired. That is, in this apparatus, a rack 108 is provided on the inner wall surface of the piston 104, and a pinion shaft 110 on which the pinion 109 is axially attached is fitted through the piston 104 so as to engage with the rack 108. Such a structure is not practical, and it is assumed that such assembly requires time and effort, so in the end a series of constructions to automatically close the door body There is a problem that the work cannot be facilitated. By the way, in this device, while the protrusion is provided on the pinion 109, the rack 108 is provided with a lacking portion, and the protrusion and the lacking portion are assembled so as to be frictionally engaged. Since a specific mode of such engagement is not disclosed, it is difficult to determine whether it can be used in this type of device.
Japanese Utility Model Publication No. 56-65074 (pages 2-6, Fig. 1)

  The problem to be solved is that the structure of the device is simple and the assembly work of the device does not require labor, thereby facilitating a series of construction work for automatically closing the door body. Is a point.

A door body closing device according to claim 1 of the present invention is a door body closing device that closes a door body that is rotatably arranged with respect to a frame body that defines an opening of a house or the like. A device body is attached to one of the door bodies, and a guided member that engages with the device body when the door body reaches a predetermined closing angle after the door body starts rotating in the closing direction, The apparatus main body is rotatably supported by a rotating shaft thereof, and includes an arm having a guide portion that allows the engaged guided member to move when the door body is closed, and before the engagement. Applies an urging force to the arm to hold the arm at an angular position adapted to the predetermined closing angle at which the arm can be engaged with the guided member. A spring for applying a biasing force rotating in the closing direction of the door body, and the sp A buffering mechanism which acts on the rotation axis of the arm so as to decelerate the rotational speed against the biasing force of the ring, when the arm is not held in an angular position adapted to the predetermined closing angle, said Auxiliary means for holding the arm at an angular position adapted to the predetermined closing angle to assist the engagement of the guided member with the guide portion of the arm, which corresponds to the frictional engagement of the conventional device. The holding force to be generated is generated between the arm and the spring, so that the structure of the apparatus is simple and it is possible to eliminate the effort for assembling the apparatus. As a result, according to the door body closing device, a series of construction work for automatically closing the door body is facilitated. In addition, according to this apparatus, when the arm is not held at an angular position adapted to the predetermined closing angle for some reason, for example, when the door is closed, the auxiliary means is activated, and the door is closed thereafter. Usability can be improved by achieving a normal state at the time of formation, that is, a state where the arm is held at an angular position adapted to a predetermined closing angle.

  The door body closing device according to claim 2 of the present invention is provided with a slider that slides on the device main body under the urging force of the spring, and the arm that receives the urging force of the spring via the slider includes: By changing the operating position of the slider with respect to the ridge portion protruding from the arm, the urging force held at the angular position is received, and the urging force rotating in the closing direction is received. This is a more specific configuration for generating the holding force by the arm and the spring, whereby the device structure is simple, and it is possible to eliminate the effort for assembling the device.

In the door body closing device according to a third aspect of the present invention, the auxiliary means is provided on one side of the arm body of the arm of the apparatus body, the lower end of which is a groove edge of the guide section. An inclined surface formed in the vicinity of the guide member, and when the door body is closed, the guided member descends along the inclined surface and engages with the guide portion when passing through the lower end portion of the inclined surface. A movable pin and a spring of the guided member that applies a biasing force against the movable pin to the lowering of the movable pin, and constitutes a specific form of auxiliary means. There is .

  The door body closing device of the present invention generates a holding force corresponding to the frictional engagement of the above-described conventional device between the arm and the spring, so that the device structure is simple and no labor is required for the device assembly operation. Thus, the construction work for automatically closing the door body is facilitated. In addition, since the buffer mechanism for reducing the rotational speed of the arm is adapted to act on the rotation shaft of the arm and the action time can be taken longer, the buffer effect can be obtained efficiently. Are better. Further, when the arm is not held at an angular position adapted to the predetermined closing angle for some reason, for example, when the door is closed, the auxiliary means works, and when the door is closed thereafter, the normal state is obtained. It is also excellent in terms of improved usability.

A door closing device according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the door body closing device 1 rotates via a hinge 5 to a vertical frame body 3 of an upper frame body 2 and vertical frame bodies 3 and 4 that define an opening of a house or the like. In the present embodiment, the door body A that can be disposed is decelerated immediately before the door body A is closed and quietly closed. In the present embodiment, the door body A is attached to the upper frame body 2 and the vertical frame body 3. The apparatus main body 6 and a bracket (guided member) 7 attached to the door body A are configured.
As shown in FIG. 2, the apparatus main body 6 includes a corner formed by one end of the upper frame 2 on the vertical frame 3 side and one end of the vertical frame 3 on the upper frame 2 side. The upper surface of the case body 8 of the apparatus main body 6 (the surface opposite to the lower surface 8a of the case body 8) is brought into contact with the upper frame body 2 while the rear end surface (case of the case body 8 of the apparatus main body 6 is A surface opposite to the front end surface 8b of the body 8) is brought into contact with the vertical frame 3, and a concave groove provided on the upper surface of the case body 8 of the apparatus body 6 is provided on the back side of the upper frame 2. The recessed groove provided on the rear end surface of the case body 8 of the apparatus main body 6 is fitted into the protruding door stopper 3 a provided on the back side of the vertical frame body 3. Installed by fitting. As described above, when attaching the apparatus main body 6, the case body 8 of the apparatus main body 6 is brought into contact with the upper frame body 2 or the vertical frame body 3 and fitted to the door stops 2 a and 3 a of the frame bodies 2 and 3. Since it only has to be attached, it can be easily attached and positioned easily. The upper surface of the case body 8 is formed on the back surface of the upper frame body 2 and the rear end surface of the case body 8 is formed on the back surface of the vertical frame body 3 without providing a groove on the upper surface or rear end surface of the case body 8. The doors 2a and 3a may be attached in contact with each other (at this time, the place where the case body 8 is disposed as shown in FIG. 2 is cut).
On the other hand, the bracket 7 is attached near the side end to which the hinge 5 is attached above the rear surface of the door body A.

The apparatus main body 6 and the bracket 7 which are attached as described above will be described with reference to FIGS. 3 to 5, the upper and rear grooves of the case body 8 are omitted.
The apparatus main body 6 includes a case body 8 whose outer shape is a substantially rectangular parallelepiped, a buffer mechanism 9 disposed on the upper surface side in the case body 8, and a lower surface 8a in the case body 8 on the opposite side to the buffer mechanism 9. On the side, the arm 12 is disposed so as to be rotatable with respect to the buffer mechanism 9 via a shaft (rotating shaft) 10, and is disposed near the side surface 8 c on the rear end surface side in the case body 8. The slider 13 includes a slider 14 and a spring 14 with a seat plate 14 a that applies a biasing force in the direction in which the slider 13 is pushed into the case body 8.

Among these, the case body 8 is a substantially rectangular parallelepiped member as described above, and is provided with a cylindrical groove 81 in which the buffer member 9 is embedded near the front end face 8b on the upper surface side. The depth from the upper surface of the case body 8 is such that the upper surface of the buffer mechanism 9 substantially coincides with the upper surface of the case body 8 when the buffer mechanism 9 is disposed in the groove 81. Further, the case body 8 is provided with a groove 82 that is partitioned by the groove sides ab, bc, cd, de, ef, fg, and ga when viewed from the direction of the lower surface 8a on the lower surface 8a side opposite to the groove 81. (See FIGS. 4 and 5) The depth of the groove 82 from the lower surface 8a is substantially equal to the lower surface 8a of the case body 8 when the arm 12 is disposed in the groove 82. It is the size to do. By the way, the portion along the groove side ab (on the front end face 8b surface) and the groove side ga (on the side surface 8c surface) of the groove 82 is where an opening to the outside of the groove 82 is formed. The groove wall of de is formed in an arc shape and prevents interference with a short arm portion 16 of the arm 12 described later when the arm 12 rotates. Further, the groove wall of the groove side cd functions as a rotation stopper of the arm 12 when the short arm portion 16 of the arm 12 abuts. Further, the case body 8 is provided with an insertion hole 83 that communicates with the groove side ef of the groove 82 and penetrates the rear end surface of the case body 8, and the slider 13 is slidably disposed in the insertion hole 83. Is done.
8d is a screw hole into which a fixing screw (not shown) is screwed, and 8e is an insertion hole for a screw 18 (see FIGS. 4 and 5) for attaching the case body 8 to the upper frame body 2. It is. 8f is an insertion hole provided in the center of the groove 81. The upper part of the boss 11 of the arm 12 is slightly inserted into the insertion hole, and functions as a bearing of the arm 12 when the arm 12 rotates. To do.
By the way, in this embodiment, the function of the rotation stopper of the arm 12 is provided to the groove wall of the groove side cd. However, the function of the rotation stopper is provided by extending the groove side fg and bringing it into contact with the arm 12. It may be.

Buffering mechanism 9, and the axial core portion hollow flat cylindrical outer frame 9a, is composed of a movable ring 9b having a rectangular hole 9b ₁ in the axial core portion of the outer frame 9a, the movable ring 9b has an outer The frame 9a is fitted with a predetermined interference fit that can be rotated. A flange 9a ₁ is provided on the outer periphery of the upper portion of the outer frame 9a. The flange 9a ₁ is provided with a fixing screw insertion hole for fixing the buffer mechanism 9 to the case body 8.
The arm 12 is a rectangular member composed of the long arm portion 15 and the short arm portion 16 described above, each having an elongated arm main body, and the joint portion between the long arm portion 15 and the short arm portion 16 of the arm main body. A rectangular hole 12b into which the shaft 10 is inserted is provided on the upper surface of the arm body (the surface opposite to the lower surface 12a below), and the rectangular hole 12b communicates with the rectangular hole 12b at the joint portion. A short cylindrical boss 11 having a height provided with a shape hole is protruded, and a substantially triangular prism-shaped protrusion 12c ₁ protrudes from the one side surface 12c of the arm main body at the joint portion. It is installed. Further, the long arm portion 15 is provided with a long groove (guide portion) 15a having a substantially inverted U-shaped cross section having an opening on the lower surface 12a side from the end portion to the vicinity of the joining portion, and the end portion of the long groove 15a. , that is, where the engagement abutment pin 7b ₁ of the bracket 7 to be described later, (see also see FIGS. 4 and 5) are cut at an angle to the center line along the long groove 15a, thereby, the pin 7b ₁ is smoothly engaged with the long groove 15a.
By the way, the shaft rod 10 described above is a small rod member having a short rectangular column shape and a length in the longitudinal direction substantially equal to the height of the case 8, and screws 17 and 19 are screwed to the upper end surface and the lower end surface of the member. Each screw hole is provided.

The slider 13 is composed of a substantially rectangular parallelepiped horizontal member 13a and a substantially rectangular parallelepiped vertical member 13b erected perpendicularly to the horizontal member 13a at one end of the horizontal member 13a. On the end side, a bottomed slot 13a _{1 in} which the spring 14 is disposed is provided, and when the spring 14 is attached to the slot 13a ₁ , the slider 13 has the slider 13 as described above. The urging force in the direction to be pushed into the case body 8 always acts. Then, in response to the biasing force of such a spring 14, the other end 13a ₂ of the slider 13 is an abutting state with respect to the protrusions 12c ₁ of the arm 12, as will be described later, of the other end 13a _2, By changing the operating position with respect to the ridge 12c ₁ , the arm 12 receives the urging force that is held at an angular position adapted to a predetermined closing angle that allows engagement with the bracket 7, and the door It receives an urging force that rotates in the closing direction of the body.
By the way, the spring 14 is attached to an appropriate position of a rectangular seat plate 14a whose one end is thin, and this seat plate 14a is attached to the rear end surface of the case body 8 with a screw or the like.

On the other hand, the bracket 7 has a rectangular mounting plate 7a having a thin plate thickness, and a thin flange 7b that is vertically coupled to the mounting plate 7a and has a substantially triangular shape that becomes narrower from the coupling portion toward the tip. and consists of, the tip side of the flange 7b, on the side of the mounting plate 7a to the flange 7b is erected, the pin 7b ₁ of the small cylindrical shape is erected.
The mounting plate 7a of the bracket 7 is provided with a plurality of screw holes for attaching the bracket 7 to the door body A at appropriate positions. When the bracket 7 is attached to the door A, the bracket 7 is attached such that the pin 7b ₁ that engages with the long groove 15a of the arm 12 on the apparatus body 6 side faces upward as shown in FIG. .

Next, how the door closing device 1 operates will be described with reference to FIGS.
Here, before explaining the operation of the door closing device 1, the assembly of the device body 6 itself will be described with reference to FIG. First, after the buffer mechanism 9 is disposed in the groove 81 of the case body 8, the fixing screw is screwed into the screw hole 8 d of the case body 8 through the insertion hole of the flange 9 a ₁ , and the buffer mechanism 9 is attached to the case body 8. Fix it. Then, while aligning the rectangular hole of the movable ring 9b of the rectangular hole 9b ₁ and the boss 11 of the arm 12 of the buffering mechanism 9 (and the arm body of the rectangular hole 12b), these rectangular holes 9b _1, etc. The shaft rod 10 is inserted and screws 17 and 19 are screwed into the screw holes of the shaft rod 10 so that the movable ring 9b and the arm 12 rotate together with the shaft rod 10. When the screws 17 and 19 are screwed, the boss 11 of the arm 12 is slightly inserted into the insertion hole 8f of the case body 8, and the upper surface of the buffer mechanism 9 substantially coincides with the upper surface of the case body 8. The lower surface 12a of the arm 12 is substantially coincident with the lower surface 8a of the case body 8. Then, after the slider 13 is disposed in the insertion hole 83 of the case body 8 and the spring 14 is inserted into the slot 13 a _{1 of the} slider 13, the seat plate 14 a of the spring 14 is attached to the rear end surface of the case body 8. . Incidentally, the slider 13 which is biased by the spring 14, the other end is in contact with the projecting portions 12c ₁ of the arm 12. The apparatus main body 6 assembled in this way is attached to the upper frame 2 and the vertical frame 3 as described above. Of course, the bracket 7 is also attached to the door body A as described above.

Next, how to operate the door body closing device 1 will be described.
Before the pin 7b _{1 of the} bracket 7 is engaged with the long groove 15a of the arm 12 of the apparatus main body 6, the slider 12 biased by the spring 14 is applied to the protrusion 12c ₁ of the arm 12, as shown in FIG. the other end 13a ₂ of 13 is in contact with, such other end 13a _2, contact position with respect to the protrusions 12c ₁ of the arm 12, in this embodiment, the other end 13a ₂ of the side end face _{13a 22} ( in this embodiment, since the chamfered portion of the other end 13a ₂₎ is in a position to act on the plan view triangular side 12c ₁₁ side of the projecting portion 12c _1, arm 12, an arrow P in FIG. On the other hand, the short arm portion 14 of the arm 12 contacts the groove wall of the groove side cd of the case body 8 and receives a counterclockwise moment from the groove wall. Accordingly, the arm 12 will be held in an angular position in which the engagement between the pin 7b ₁ of the bracket 7, as indicated in the figure is adapted to a predetermined closing angle as possible.
When the door A go closed in the direction of the arrow in the figure, pin elongated groove 15a of the engageable opening, as indicated in the figure to the pin 7b ₁ of the bracket 7 to the long groove 15a of the arm 12 is engaged 7b ₁ is reached.

After the pin 7b ₁ is engaged with the long groove 15a, the door A, when the pin 7b ₁ according closing direction of the arrow in FIG. 4 begins to move in a manner that along the long groove 15a, the arm 12 is in the drawing at the same time begins to rotate in a direction opposite to the arrow P, the other end 13a ₂ of the slider 13, the contact position relative to ridges 12c ₁ of the arm 12, in this embodiment, as shown in FIG. 5, this Since the front end surface 13a ₂₁ of the other end 13a ₂ changes to a position where the front end surface 13a ₂₁ acts on the side 12c ₁₂ side of the substantially triangular shape of the ridge portion 12c ₁ , the arm 12 has a moment in the direction opposite to the arrow P in FIG. Receive. In response to this moment, the arm 12 starts to rotate and the door A automatically rotates in the direction of the arrow in FIG. 4 and is closed as shown in FIG.
However, when the arm 12 is rotated, the rotation speed is decelerated by the buffer mechanism 9 acting on the rotation shaft of the arm 12. Therefore, when the door body A is closed, the rotation of the door body A is also decelerated. become. For this reason, the door body A is silently closed without causing a problem that the door body 2 collides with the door stops 2a and 3a vigorously to generate an impact sound or the like.
However, after closure of the door A, when the door body A going to open in the direction of the arrow in FIG. 5, while the pin 7b ₁ of the bracket 7 is moved along the long groove 15a of the arm 12, the arm 12 is while resisting the biasing force of the spring 14 continue to rotate in an arrow direction in FIG. 5, the engagement between the pin 7b ₁ of the elongated groove 15a and the bracket 7 of the arm 12 is disengaged upon reaching the state shown in FIG. 4 However, at this deviated position, it is held at the angular position adapted to the predetermined closing angle as described above.

  By the way, in this Embodiment, although what comprised the outer frame 9a like the buffer mechanism 9 and the movable ring 9b as a buffer mechanism was demonstrated, for example, an appropriate number of discs are put in the outer frame 9a. It may be a layered structure in which viscous fluids are filled between the disks.

A door body closing device according to a second embodiment of the present invention will be described with reference to FIGS. 6 and 7, the same components as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted.
This door body closing device 20 adds an auxiliary means 21 to the door body closing apparatus 1, and when the arm is not held at an angular position adapted to a predetermined closing angle for some reason, In other words, in this embodiment, the arm 22 is used in place of the arm 12 and the bracket 7 is used. Instead, a bracket (guided member) 23 is used, and the arm 22 and the bracket 23 constitute the auxiliary means 21.

Of these, the arm 22 is different from the arm 12 in that an inclined surface 22a is formed on one side surface 12c of the arm body. That is, it can be specifically described in detail so that an inclined surface 22a having a predetermined width and a predetermined angle is formed near the closed end of the long groove 15a provided in the arm main body on the one side surface 12c side of the arm main body. For example, the side surface 12c of the arm body protrudes slightly downward from the upper surface of the arm body to form an upper end portion of the inclined surface 22a, and is close to the groove edge of the long groove 15a on the lower surface 12a of the arm body. The lower end portion of the inclined surface 22a is formed, and the plane connecting the upper end portion and the lower end portion constitutes the inclined surface 22a, and the inclined surface 22a is a slot core (= It is formed so as to form a predetermined angle with respect to an axis of the movable pin 24 described below of the bracket 23 (see FIG. 7). In addition, the width of the inclined surface 22 a is appropriately larger than the outer diameter length of the following cylindrical portion 24 a of the movable pin 24 of the bracket 23.
On the other hand, the bracket 23 is a substantially triangular prism-shaped member in which the upper surface 23a and the lower surface 23b have a substantially triangular shape and the side surface 23c has a rectangular shape, and the tip of the member located on the apex side corresponding to the side surface 23c As shown in detail in FIG. 7, a deep long diameter large hole 23d and a shallow long diameter small hole 23e communicating with the large diameter hole 23d are provided in such a manner as to penetrate from the upper surface 23a to the lower surface 23b. The large-diameter hole 23d and the small-diameter hole 23e include a movable pin 24 including a large-diameter cylindrical portion 24a and a small-diameter cylindrical portion 24b with a flange continuously provided on the cylindrical portion 24a, and a spring. 25 is loosely inserted. In the movable pin 24, a part of the cylindrical part 24a on the side opposite to the continuous side of the cylindrical part 24b protrudes from the upper surface 23a, and a part on the flanged side of the cylindrical part 24b protrudes from the lower surface 23b. Thus, the spring 25 is biased. Each end of the spring 25 is formed on a seat surface formed at a position where the cylindrical portion 24a is connected to the cylindrical portion 24b and a position where the large diameter hole 23d is communicated with the small diameter hole 23e. Each is arranged.
A plurality of screw holes for attaching the bracket 23 to the door body A are provided at appropriate positions on the side surface 23c of the bracket 23. When the bracket 23 is attached to the door A, the bracket 23 is attached so that the movable pin 24 that engages with the long groove 15 a of the arm 22 faces upward as in the case of the bracket 7.

Next, how the door closing device 20 operates when the assisting means 21 operates will be described with reference to FIG. Note that the movable pin 24 of the bracket 23 is engaged with the normal operation of the door closing device 20, that is, the long groove 15a of the arm 22 held at an angular position adapted to a predetermined closing angle according to the closing of the door A. About the operation | movement to match, it is the same as that of the operation | movement of the said door body closing apparatus 1. FIG.
In the door closing device 20, when the arm 22 is not held at an angular position adapted to a predetermined closing angle for some reason, that is, the arm 22 is parallel to the upper frame 2 as shown in FIG. When the state becomes unsatisfactory, the auxiliary means 21 can work to return to normal operation.
Specifically, even when the arm 22 is in a state of being parallel to the upper frame body 2, when the door body A is closed, the cylindrical portion 24 a of the movable pin 24 becomes the inclined surface 22 a of the arm 22. Abut. Then, when the door body A is closed, the movable pin 24 moves down along the inclined surface 22a while the cylindrical portion 24a resists the urging force of the spring 25 and passes over the lower end portion of the inclined surface 22a. The arm 22 is engaged with the long groove 15a. After the movable pin 24 is thus engaged with the long groove 15a, the normal operation of the door body closing device 20 becomes possible. For example, when the door body A is opened, the movable pin of the bracket 23 is opened. 24 moves along the long groove 15a of the arm 22, while the arm 22 rotates in the direction of the arrow in FIG. 5, for example, against the urging force of the spring 14, resulting in the state shown in FIG. By the way, the engagement between the long groove 15a of the arm 22 and the movable pin 24 of the bracket 23 is disengaged. At this disengaged position, the arm 22 is adapted to a predetermined closing angle in the same manner as the door body closing device 1 described above. Held at the angular position.
In some cases, a finger is placed on the collar of the movable pin 24 and pulled down against the urging force of the spring 14 to close the door body A, and then the tension on the movable pin 24 is released and the movable pin 24 is released. The cylindrical portion 24 a may be engaged with the long groove 15 a of the arm 22.

  By the way, the auxiliary means 21 can be added to the automatic door closing device described in the section of the prior art for the purpose of improving usability. For example, the apparatus main body is attached to one of the frame body or the door body, and the guided member is engaged with the apparatus main body when the door body reaches a predetermined closing angle after the door body starts rotating in the closing direction. The apparatus main body is provided with an arm having a guide portion that supports the rotation shaft of the apparatus so that the rotating shaft is rotatable and allows the engaged guided member to move as the door body is closed, and the arm. A spring for applying an urging force for rotating the door body in the closing direction; and a holding means for holding the arm at an angular position adapted to a predetermined closing angle that can be engaged with the guided member. Further, the auxiliary means 21 can be added to the configuration.

  Since the door closing device of the present invention holds the arm at an angular position adapted to a predetermined closing angle by biasing the spring, the arm rotates in the closing direction of the door, Compared to conventional devices, the device structure is simple, and it is possible to avoid the need for labor for assembling the device.As a result, construction work for automatically closing the door body is facilitated. If for some reason the arm is not held at an angular position adapted to the predetermined closing angle, for example, when the door is closed, the auxiliary means will work, and when the door is closed after that, it will be in the normal state. Therefore, it can be said that this type of device is widely used in general because it has improved usability.

It is a figure which shows the attachment state of the door body closing apparatus which concerns on the 1st Embodiment of this invention. It is the perspective view which looked at the door body closing device in the attachment state of FIG. 1 from diagonally downward. It is the disassembled perspective view which looked at the door body closing apparatus of FIG. 1 from diagonally downward. It is operation | movement explanatory drawing of the door body closing apparatus of FIG. It is operation | movement explanatory drawing of the door body closing apparatus of FIG. It is the disassembled perspective view which looked at the door body closure apparatus concerning the 2nd Embodiment of this invention from diagonally downward. It is operation | movement explanatory drawing of the door body closing apparatus of FIG. It is a block diagram of the conventional automatic door closing apparatus.

Explanation of symbols

1,20 Door body closing device 2 Upper frame body 3 Vertical frame body 6 Device body 7, 23 Bracket (guided member)
9 Buffer mechanism 10 Shaft bar (Rotating shaft)
12, 22 Arm 12c ₁ ridge 13 Slider 14 Spring 15a Long groove (guide part)
21 Auxiliary means A Door

Claims (3)

A door body closing device for closing a door body rotatably arranged with respect to a frame body that defines an opening of a house or the like, wherein the apparatus main body is attached to one of the frame body or the door body, and the other A guided member that engages with the apparatus main body when a predetermined closing angle is reached after the door body starts rotating in the closing direction is attached to the apparatus main body so that the rotation shaft can rotate. An arm provided with a guide portion that supports and engages the engaged guided member with movement of the door body, the arm before the engagement, and the arm with the guided member. A biasing force that holds the arm at an angular position adapted to the predetermined closing angle that can be engaged is applied to the arm, and a biasing force that rotates the arm in the closing direction of the door body is applied to the arm after the engagement. And the rotation speed against the biasing force of the spring When the buffer mechanism which acts on the rotation axis of the arm so as to decelerate, the arm is not held in an angular position adapted to the predetermined closing angle, of the guided member to the guide portion of the arm A door body closing device comprising: auxiliary means for holding the arm at an angular position adapted to the predetermined closing angle to assist the engagement . The apparatus body is provided with a slider that slides under the urging force of the spring, and the arm that receives the urging force of the spring via the slider acts on the ridge portion protruding from the arm. 2. The door body closing device according to claim 1, wherein the door body closing device receives a biasing force held at the angular position and a biasing force rotating in the closing direction by changing the position. The auxiliary means includes an inclined surface formed at one side surface of the arm body of the arm of the apparatus body where the guide portion is provided, a lower end portion of which is formed close to a groove edge of the guide portion, and the door body. The movable pin of the guided member that engages with the guide portion when it is lowered along the inclined surface and passes the lower end portion of the inclined surface, and the movable pin is lowered with respect to the movable pin. The door body closing device according to claim 1 or 2, comprising a spring of the guided member that imparts an urging force to resist .

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