JP2008274583A - Door closer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door closer allowing a worker to confirm compressibility of a spring clearly and visually from the outside and preventing the compressibility of the spring from being changed by worker's erroneous operation with respect to the adjustment of opening and closing force. <P>SOLUTION: This door closer C is provided with a closer body 20 attached to a door 4 provided with a rotary shaft 17 and the spring 28 resisting the rotation of the rotary shaft 17 when opening the door 4 and a link mechanism for rotating the rotary shaft 17 in accordance with opening or closing of the door 4. This door closer C is provided with an adjusting screw part 30 for adjusting resistance force of the spring 28 to the rotation of the rotary shaft 17, an operation mechanism part provided with an operation shaft 55 arranged at a position where it crosses the adjusting screw part 30 orthogonally, and a connection mechanism part for connecting the operation shaft 55 with the adjusting screw part 30 to rotate the adjusting screw part 30 in accordance with the rotation of the operation shaft 55. The operation shaft 55 can move in the direction of its axial line to connect the operation shaft 55 with the adjusting screw part 30 or release the connection by travel of the operation shaft 55. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present application relates to a door closer, and more particularly, to a technical field of a conshielded door closer provided with a device that displays an opening / closing force of a door.

  A door closer is usually attached to a door attached to the entrance of a building. Various types of door closers are known, but generally known door closers have a spring that generates a repulsive force when the door is opened, and the speed at which the door closes against the repulsive force of the spring. And a control mechanism for adjusting.

  The door closer can adjust the opening and closing force of the door by adjusting the compression ratio of the spring, but in general, the compression ratio is adjusted through trial and error while appropriately adjusting the compression ratio of the spring. It is supposed to be.

  There is a door closer provided with a display device that displays the compression rate of a spring so as to be visible (see Patent Document 1).

  The door closer described in Patent Literature 1 includes a rotatable dial on the side surface of the main body, and rotates a nut-like member connected to an adjustment screw portion for adjusting the compression rate of the spring in conjunction with the rotation of the dial. In addition, the amount of movement of the nut-like member that moves relatively by the rotation of the dial can be viewed from the outside.

JP-A-62-182381

  However, the door closer described in Patent Document 1 may change the opening / closing force of the door by mistakenly operating the dial after attaching the door closer to the door.

  Further, as a practical problem, if the amount of movement of the nut is small, the amount of movement cannot be clearly observed, and the compression rate of the adjusted spring cannot be clearly confirmed.

  Therefore, the present invention has been made with the above problem as an example of the problem. Regarding the adjustment of the opening / closing force, the compression rate of the spring can be clearly confirmed by visual observation from the outside, and the compression rate of the spring is changed by an erroneous operation or the like. The purpose is to provide a difficult door closer.

  In order to solve the above-described problem, a door closer according to claim 1 is provided with a closer body attached to a door provided with a rotating shaft and a spring that resists rotation of the rotating shaft, and for opening and closing the door. And a link mechanism that rotates the rotating shaft, and an adjustment screw portion that adjusts a resistance force of the spring against the rotation of the rotating shaft and a position that is orthogonal to the adjustment screw portion. An operation mechanism portion having an operation shaft, a connection mechanism portion for connecting the operation shaft and the adjustment screw portion so as to rotate the adjustment screw portion according to the rotation of the operation shaft, and the operation shaft are It is movable in the axial direction, and the connection between the operation shaft and the adjusting screw portion and the connection can be released by the movement of the operation shaft.

  According to a second aspect of the present invention, the door closer according to the first aspect further comprises display means for displaying a value indicating the resistance force of the spring in conjunction with the rotation of the operation shaft. And

  The door closer according to claim 3 is the door closer according to claim 2, wherein the operation shaft is fixed when the connection between the operation shaft and the adjustment screw portion is released. And

  According to a fourth aspect of the present invention, the door closer according to any one of the first to third aspects is characterized in that the front coupling mechanism portion is composed of a pair of gears.

  According to the present invention, it is possible to prevent the spring compression ratio from being changed by mistake. Further, the compression rate of the spring can be easily confirmed visually.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. In addition, the door closer of this application is applied to the door closer generally called a conshield door closer as an example.

-Door closer configuration-
First, with reference to FIG. 1 thru | or FIG. 5, the structure of the door closer in this embodiment is demonstrated. 1 is an external view of a door closer according to the present embodiment, FIG. 2 is an internal structural diagram of the door closer, FIG. 3 is a structural diagram of a rotating body, FIG. 4 is a diagram showing a positional relationship between the rotating body and the third gear, and FIG. It is a cross-sectional view of the scale vicinity.

  As shown in FIG. 1, the door closer C includes a base 11 fixedly installed inside the upper frame 2 and an arm 14 whose rear end is rotatably installed with respect to a shaft body 12 of the base 11. A link mechanism unit 15 configured, and a closer body 20 that is rotatably installed via the link mechanism unit 15 and a rotation shaft 17 are provided. The closer main body 20 includes a main body mounting plate 22 for fixing to the door 4, and is fixed to the inside of the door 4 via the main body mounting plate 22.

  As shown in FIG. 2, the closer body 20 has a housing 21 having a substantially square cylindrical shape. Both ends of the housing 21 are closed by plugs 23 and 24, and the inside of the housing 21 is filled with fluid oil.

  Inside the housing 21, one end protrudes upward and is connected to the link mechanism 15, a piston 26 that reciprocates in the left-right direction inside the housing 21, and the piston 26 when the door 4 is opened. A spring 28 that provides resistance to the rotation of the rotary shaft 17 via an adjustment screw 30 that adjusts the magnitude of the resistance of the spring 28, and an opening / closing control mechanism that controls the opening / closing speed of the door 4 using fluid. (Not shown). The piston 26 and the spring 28 provided in the housing 21 are arranged in a straight line in the axial direction.

  A rack 26 a is formed on the piston 26, and a pinion 17 a that meshes with the rack 26 a is provided on the rotating shaft 17. The rack 26a and the pinion 17a are engaged with each other by the rotation of the rotary shaft 17, so that the piston 26 reciprocates in the left-right direction inside the housing 21.

  The piston 26 divides the left and right sides of the housing 21 into a first chamber 21 a and a second chamber 21 b and supports one end of the spring 28. The first chamber 21 a is a space between the piston 26 and the plug 24 in the housing 21, and the second chamber 21 b is a space between the piston 26 and the plug 23.

  A through hole 35a is formed at one end of the piston 26, and a check valve 35 is incorporated at the other end. The check valve 35 allows oil to pass from the first chamber 21a of the housing 22 to the second chamber 21b, while preventing oil from passing from the second chamber 21b to the first chamber 21a. ing. Moreover, although not shown in figure, the 1st chamber 21a and the 2nd chamber 21b are connected via the channel | path, and the speed adjustment valve which adjusts the speed | rate in which oil flows is provided in this channel | path. When the door 4 opens (when the piston 26 moves to the left), the oil moves from the first chamber 21a to the second chamber 21b through the through hole 35a and the check valve 35, and the door 4 is closed. At times (when the piston moves to the right), the oil moves through the passage.

  The other of the springs 28 is supported by a spring seat 36 that can move in the left-right direction inside the housing 21, and an adjustment screw 37 is attached to the spring seat 36 along the axial direction of the housing 21. .

  Although not shown, a convex portion is provided on the outer periphery of the spring seat 36, and the convex portion of the spring seat 36 is fitted on the inner peripheral portion of the housing 21 in the axial direction of the housing 21 within the adjustment range of the spring seat 36. The spring recess 36 is prevented from rotating by providing the mating concave groove, but any configuration is possible as long as the spring receiver 36 can move in the left-right direction within the housing 21 without rotating. It does not matter if

  The other end of the adjustment screw 37 protrudes outside through the plug 24, and a first gear 41 is attached to the end of the adjustment screw 37. The first gear 41 is coaxially connected to the adjustment screw 37, and the adjustment screw 37 rotates in conjunction with the rotation of the first gear 41. Accordingly, the adjustment screw 37 is rotated by the rotation of the first gear 41, so that the spring seat receiver 36 can be moved in the axial direction of the housing 21. By this operation, the compression rate of the spring 28 can be adjusted, so that the magnitude of the resistance force of the spring 28 against the rotation of the rotary shaft 17 can be adjusted.

  On the other hand, two holes 22a and 22b are formed in the main body mounting plate 22 with a predetermined interval. One hole 22 a is formed for inserting a tool for adjusting the compression rate of the spring 28, and the other hole 22 b is formed for visually checking the value of the compression rate of the spring 28.

  A bearing 52 in which a cylindrical portion 52 a is formed coaxially with one hole portion 22 a is attached to the lower end surface of the main body mounting plate 22 by a bearing fixing screw 51. In the cylindrical portion 52a, a gear shaft 55 having a head 53 in which a tool-shaped groove such as a hexagon wrench is formed is disposed at the upper end. A second gear 57 for meshing with the first gear 41 and a rotating body 58 disposed on top of the second gear 57 are attached to the end of the gear shaft 55. A coil spring 59 is disposed between the peripheral surface of the gear shaft 55 and the inner wall surface of the cylindrical portion 52a. The coil spring 59 is disposed so as to engage with a head 53 of the gear shaft 55 and a protrusion formed at the lower end of the cylindrical portion 52a. The coil spring 59 urges the head 53 upward, and the gear shaft 55 is movable in the axial direction by the coil spring 59. The rotating body 58 is in contact with the lower end surface of the bearing 52 by the biasing force of the coil spring 59, and the second gear 57 is disposed above the first gear 41, but the gear shaft 55 is connected to the coil spring 59. The second gear 57 is engaged with the first gear 41 by being pushed downward against the pressing force of.

  Further, as shown in FIGS. 2 to 4, the second gear 57 and the rotating body 58 are formed with a plurality of holes 58a evenly around their axes, and the bearing 52 has a hole 58a. The pin 52b to be fitted is fixedly attached. While the rotating body 58 is in contact with the lower end surface of the bearing 52 by the biasing force of the coil spring 59, the pin 52b is inserted into the hole 58a, and the rotating body 58 and the second gear 57 rotate. It is designed to prevent you from doing it. Therefore, even if it is going to rotate the gear shaft 55 in this state, since the rotary body 58 and the 2nd gearwheel 57 do not rotate, the gear shaft 55 cannot be rotated.

  Further, as shown in FIGS. 3 to 5, a tooth body 58 b that protrudes in the outer peripheral direction is provided upright at the outer peripheral end portion of the upper end surface of the rotating body 58. The tooth body 58b meshes with a third gear 67 attached via another gear shaft 66. Further, as shown in FIG. 5, a rotating body 71 is disposed on top of the third gear 67 so as to rotate in conjunction with the third gear 67 and the teeth of the third gear 67. When the portion does not mesh with the tooth body 58b of the rotating body 58, the rotation of the third gear 67 is prevented. The other gear shaft 66 is fixedly attached to the main body attachment plate 22.

  The rotating body 71 is configured such that the outer peripheral end of the rotating body 71 is disposed below the other hole 22 b formed in the main body mounting plate 22. A spring 69 that resists the rotation of the third gear 67 is attached to the outer periphery of the third gear 67. This prevents the third gear 67 from rattling.

  As shown in FIG. 5, a predetermined scale 73 is displayed on the outer peripheral end of the upper surface of the rotating body 71. The scale 73 displays a value indicating the magnitude of the resistance force of the spring 28 in conjunction with the rotation of the gear shaft 55. The third gear 67 rotates up and down one notch every time the gear shaft 55 rotates once.

-Door closer operation-
Next, the operation of the door closer C will be described with reference to FIG. FIG. 6 is an internal structure diagram showing an operation example of the door closer.

  In the door closer C shown in the present embodiment, when the opening / closing force of the door 4 is adjusted, the tool T that matches the groove formed in the head 53 of the gear shaft 55 is inserted into one hole 22a, and the head This is done by rotating the part 53.

  First, the tool T is fitted into the groove of the head 53 and pushed downward against the coil spring 59, whereby the second gear 57 and the rotating body 58 are released from the pin 52b and can rotate. In this state, the second gear 57 is engaged with the first gear 41 by further pressing downward. When the tool T is rotated in a predetermined direction by the user, the gear shaft 55 is rotated, and the adjustment screw 37 of the adjustment screw portion 30 is rotated via the second gear 57 and the first gear 41 according to the rotation. Is rotated.

  By this rotation, the spring seat 36 moves in the left-right direction inside the housing 21 so that the compression ratio of the spring 28 can be adjusted.

  On the other hand, the third gear 67 rotates through the rotating body 58 according to the rotation of the gear shaft 55, and the scale 73 described in the rotating body 71 arranged on the upper portion of the third gear 67 responds to the rotation. Since the compression rate of the spring 28 is displayed through the other hole 22b, the user can clearly check the compression rate of the spring 28 from the other hole 22b. Moreover, it is possible to adjust based on the displayed value.

  As described above, the door closer C of the present embodiment has the closer body 20 attached to the door 4 that functions as a door including the rotary shaft 17 and the spring 28 that resists the rotation of the rotary shaft 17. In the door closer C, which includes the arm 14 and the base 11 as a link mechanism that rotates the rotating shaft 17 in accordance with the opening and closing of the door 4, the resistance force of the spring 28 against the rotation of the rotating shaft 17 is adjusted. An adjusting screw portion 30, an operating mechanism portion including a gear shaft 55 functioning as an operating shaft disposed at a position orthogonal to the adjusting screw portion 30, and the adjusting screw portion according to the rotation of the gear shaft 55. A coupling mechanism (coil spring 59, first gear 41, second gear 5) for coupling the gear shaft 55 and the adjusting screw 30 to rotate the gear 30. The gear shaft 55 is movable in the axial direction thereof, and the movement of the gear shaft 55 allows the connection between the gear shaft 55 and the adjusting screw portion 30 and the connection can be released. It has become.

  In this way, even if the gear shaft 55 rotates by mistake, the compression rate of the spring 28 is not changed, so that the opening / closing force of the door 4 does not change.

  Further, another hole portion 22b that functions as a display window for displaying a value indicating the resistance force of the spring 28 in conjunction with the rotation of the gear shaft 55 is provided. In this way, the user can clearly confirm the compression rate of the spring 28 by visual observation.

  Further, when the connection between the gear shaft 55 and the adjustment screw portion 30 is released, the gear shaft 55 is fixed. In this way, when the connection between the gear shaft 55 and the adjustment screw portion 30 is released, the gear shaft 55 does not rotate, so the value indicating the resistance force of the spring 28 does not change, and the The value displayed by the rotation of the gear shaft 55 is not changed.

  In addition, this embodiment is one form, and is not limited to this form. For example, in the present embodiment, the first gear 41 and the second gear 57 are formed of a thin plate, A commonly used bevel gear may be applied. Further, a Geneva mechanism or the like may be used instead of the rotating body 57 and the third gear 67.

It is an external view of the door closer which concerns on this embodiment. It is an internal structure figure of a door closer. It is a structure figure of a rotary body. It is a figure which shows the positional relationship of a rotary body and a 3rd gearwheel. It is a cross-sectional view of the scale vicinity. It is an internal structure figure which shows the operation example of a door closer. .

Explanation of symbols

C Door closer 4 Door 17 Rotating shaft 20 Closer body 28 Spring 30 Adjustment screw portion 41 First gear 55 Gear shaft 57 Second gear

Claims (4)

In a door closer comprising: a closer body attached to a door provided with a rotating shaft; a spring that resists rotation of the rotating shaft; and a link mechanism that rotates the rotating shaft when the door is opened and closed. ,
An adjustment screw for adjusting the resistance of the spring against the rotation of the rotating shaft;
An operation mechanism unit including an operation shaft disposed at a position orthogonal to the adjustment screw unit;
A connection mechanism for connecting the operation shaft and the adjustment screw so as to rotate the adjustment screw according to the rotation of the operation shaft;
The operation shaft is movable in the axial direction thereof, and the connection between the operation shaft and the adjustment screw portion and the connection can be released by the movement of the operation shaft.   The door closer according to claim 1, further comprising display means for displaying a value indicating a resistance force of the spring in conjunction with rotation of the operation shaft.   The door closer according to claim 2, wherein the operation shaft is fixed when the connection between the operation shaft and the adjustment screw portion is released.   The door closer according to any one of claims 1 to 3, wherein the coupling mechanism portion is constituted by a pair of gears.

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