KR20080078317A - Door closer - Google Patents

Abstract

The present invention provides a door closer functioning to automatically close a door, comprising: a housing including a mounting portion and a cylindrical body; A shaft inserted into the main body; A rotation valve fixed to the shaft and rotating along the inner circumferential surface of the main body; A first cover coupled to the inside of the main body to seal the first opening of the main body; A spring winding member fixed to the shaft and protruding members formed on the outer circumference up and down; One end portion is formed in a ring shape so as to be caught by the protruding member, the spring winding wound when the spring winding member rotates; A spring fixing member for fixing the other end of the mainspring; And a second cover coupled to the inside of the main body to seal the second opening of the main body, and when the door is opened by connecting the shaft with a rotating shaft connected to the door frame, the shaft rotates to wind the spring. When the door is opened and the hand is released from the door after the door is opened, the door closer is characterized in that the door is automatically closed due to the restoring force of the spring.

The door closer according to the present invention has the effect of reducing the manufacturing cost and improving the work productivity by miniaturizing its size by using a spring and a rotation valve.

Description

Door Closer {DOOR CLOSER}

1 is a plan sectional view showing a housing according to the present invention.

Figure 2 is a side view of the housing according to the present invention.

3 is an exploded perspective view showing the door closer according to the present invention.

Figure 4 is a cross-sectional view showing a door closer according to the present invention.

Figure 5 is a side cross-sectional view showing a door closer according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: housing 110: shaft

120: rotation valve 130: first cover

140: spring wound member 150: hand spring

160: spring fixing member 170: second cover

The present invention relates to a hydraulic door closer that facilitates the opening and closing of the door by using a spring and hydraulic pressure, and more specifically, to a structure that can be circulated oil quickly to miniaturize its size, in the open state It relates to a door closer that can be stopped.

In general, a conventional hydraulic door closer comprises a cylinder, a compression spring, a pinion shaft and a piston. When the door is opened, the compression spring is compressed while the piston is retracted by the rotational force applied to the pinion shaft, and the compressed spring is restored to rotate the pinion shaft engaged with the piston to close the door. When the piston is moved forward and backward, the oil filled in the front and rear of the piston circulates through the oil passage inside the piston and the oil circulation passage connecting the front and the rear of the cylinder. It is configured to control the closing speed of the.

In the case of such a door closer, the manufacturing process is difficult because the size is large and heavy as a whole, there is a problem that the manufacturing cost rises.

In addition, the door is automatically closed when the door is opened, but the door cannot be stopped in an open state. Therefore, the door must be held in order to stop the door, or a door stopper must be separately installed at the bottom of the door.

In order to solve the problems of the prior art as described above, an object of the present invention is to provide a door enclosure that can reduce the manufacturing cost by miniaturizing the size by using the spring and the rotary valve.

It is also an object of the present invention to provide a door closer that can close the door automatically as well as stop the door in the open state.

In order to achieve the above object, the present invention provides a door closer having a function of automatically closing a door, the lower part of which is mounted in a horizontal plate shape so as to be mounted on the door, and the upper part of the first opening part and the second opening part on both sides. A housing including a cylindrical body having a boundary portion formed therebetween, the boundary portion separating the first opening portion and the second opening portion therebetween; A shaft having one end inserted into the main body boundary part and positioned at a second opening part, and the other end being located outside the first opening part; A circular valve fixed to the shaft and a protruding portion contacting the inner circumferential surface of the main body above the body, the rotating valve being positioned in the first opening and rotating along the inner circumferential surface of the main body; A first cover coupled to the inside of the main body to seal the first opening of the main body and inserted into the shaft; A spring winding member inserted into the second opening of the main body and fitted with one end of the shaft, and having a protruding member formed on an outer circumference thereof; A spring that is inserted into the protruding member of the spring winding member and whose one end is formed in a ring shape so as to be caught by the protruding member and is wound when the spring winding member rotates; A spring fixing member having a locking groove having a predetermined depth formed in the longitudinal direction to fix the other end of the main spring and inserted into the main spring; And a second cover coupled to the inside of the main body to seal the second opening of the main body and integrally fixed to the spring fixing member. It is configured to include, the shaft is connected to the rotary shaft connected to the door frame when the door is opened, the shaft is rotated to wound the spring spring to open the door, and release the hand from the door after the door is opened with the restoring force of the spring spring It provides a door closer characterized in that the door is automatically closed.

In addition, the present invention provides a door closer, characterized in that the first cover and the boundary portion is provided with a bearing inserted into the insert for smooth rotation of the shaft.

In addition, the present invention is formed in the main body of the housing protruding upward from the lower center of the first opening of the main body to support the rotation valve, and the anti-rotation jaw is formed on both sides of the pedestal, when the rotation valve is rotated Protruding portion of the rotation valve is in contact with the anti-rotation stop to stop the rotation, and provides a door closer, characterized in that for rotating the rotation valve within a certain angle range.

In addition, the present invention is a through-hole is formed in the pedestal of the main body, a compression spring is inserted into the through hole, the upper end of the compression spring is provided with a steel ball, the lower end of the compression spring to support the compression spring It characterized in that the support is provided, the body of the rotary valve is formed with a concave groove on the outside to match the circumference of the steel ball, the steel ball is caught in the groove when the rotary valve is rotated to rotate the rotary valve It provides a door closer characterized in that the stop.

In addition, the present invention provides a door closer, characterized in that at least one groove formed in the rotation valve.

In addition, the present invention is an oil sphere formed in the boundary portion of the main body to the outside of the boundary so that oil can flow; An oil circulation path extending from the oil sphere to the anti-rotation jaw and circulating the introduced oil; A first oil hole communicating with the oil circulation path between the pedestal and the anti-rotation jaw positioned on the left side of the pedestal; A second oil hole communicating with the oil circulation path between the pedestal and the anti-rotation jaw positioned on the right side of the pedestal; And a flow rate adjusting screw for opening and closing the oil sphere, and controlling the amount of oil passing through the first oil hole or the second oil hole and the oil circulation path to reduce the rotational speed of the rotation valve. It is configured to include, and when the oil is introduced into the oil sphere flows through the oil circulation path flows into the first oil hole and the second oil hole is filled with oil in the first opening, the rotation direction when the rotation valve rotates After the oil is introduced into the first oil hole or the second oil hole flows through the oil circulation path, it is possible to repeat the circulation of the oil outflow to the second oil hole or the first oil hole Provide a door closer.

In addition, the present invention is the first through hole through which the oil can pass through the protrusion of the rotary valve, and a second through hole of a diameter larger than the first through hole is formed, the second through the first through hole A check ball having a size that cannot be inserted is inserted, and a fixing member intercepting the second through hole is coupled to prevent the check ball from escaping from the second through hole. The check ball provides a door closer, characterized in that the oil can be quickly circulated by selectively opening and closing the second through hole.

In addition, the present invention provides a door closer, characterized in that the first cover, the boundary portion is provided with an O-ring for airtightness to prevent oil leakage introduced into the first opening.

In addition, the present invention provides a door closer, characterized in that the wrench groove is formed on the opposite side of the locking groove formed of the spring fixing member, by inserting a wrench into the wrench groove to rotate the spring spring of the spring. do.

In addition, the present invention is the outer circumferential surface of the second cover is formed with a plurality of through holes in the circumferential direction, the spring fixing member is formed with a fitting groove corresponding to the through hole to adjust the spring pressure by rotating the spring fixing member Thereafter, the fitting groove provides a door closer characterized in that it is fixed to the fixing pin by facing the through hole.

Hereinafter, a door closer according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in more detail.

1 is a plan sectional view showing a housing according to the present invention, Figure 2 is a side view showing a housing according to the present invention.

1 to 2, the housing 100 has a horizontal plate-shaped mounting portion 101 formed at a lower portion thereof so as to be mounted to a door, and an upper portion of the first opening portion 102 and a second opening portion 103 at both sides thereof. ) Is formed and a cylindrical body 105 having a boundary portion 104 separating the first opening portion 102 and the second opening portion 103 is formed therebetween.

The first opening 102 has a pedestal 106 protruding upward from the lower center of the first opening 102 and a rotation preventing jaw 107 formed at both sides of the pedestal 106. The end of the pedestal 106 is formed in a concave round, the end of the anti-rotation jaw 107 is formed flat. In addition, a through hole 205 is formed in the pedestal 106.

The boundary portion 104 has an insertion hole 108 in the axial direction in the inner center, the oil sphere 200 is formed so that the oil can flow outward. An oil circulation path 201 extending horizontally from the oil sphere 200 to the anti-rotation jaw 107 is formed, and the anti-rotation jaw 107 located at both sides of the pedestal 106 and the pedestal 106. Oil holes 202 and 203 communicating with the oil circulation path 201 are formed therebetween. When oil is introduced into the oil hole 200, the oil flows through the oil circulation path 201 and flows out into the oil holes 202 and 203 to be filled with the first opening 102.

3 is an exploded perspective view showing a door closer according to the present invention, Figure 4 is a cross-sectional view showing a door closer according to the present invention.

3 to 4, the door closer according to the preferred embodiment of the present invention includes a housing 100 and a shaft 110 inserted into the housing 100, a rotation valve 120, and a first cover 130. The spring winding member 140, the spring spring 150, the spring fixing member 160, the second cover 170 is composed of.

In more detail, the component inserted into the first opening 102 (FIG. 1) of the main body 105 includes a shaft 110, a rotation valve 120, a first cover 130, and the main body 105. The component inserted into the second opening 103 of FIG. 1 is composed of a spring winding member 140, a spring spring 150, a spring fixing member 160, and a second cover 170.

The shaft 110 is inserted into the insertion hole 108 (FIG. 2) of the main body 105, one end of which is positioned at the second opening 103 (FIG. 1), and the other end of the shaft 110 is first opening 102. 1) is located outward. The other end of the shaft 110 is connected to a rotating shaft (not shown) connecting the door and the door frame, thereby receiving the rotational force of the rotating shaft (not shown).

The pivot valve 120 is fitted and fixed to the shaft 110. In order to fix the pivoting valve 120 and the shaft 110, it is fixed by using a fixing key (not shown). The rotation valve 120 rotates along the inner circumferential surface in contact with the inner circumferential surface of the main body 105.

The first cover 130 is screwed into the main body 105 to seal the first opening 102 (FIG. 1) of the main body 105, and the shaft 110 is inserted into the main cover 105.

The spring winding member 140 is inserted into the second opening 103 (FIG. 1) of the main body 105 and fixed to one end of the shaft 110 and the fixing plate 145. The fixing plate 145 is screwed and fixed to the shaft 110 to prevent the spring winding member 140 is separated. And the outer periphery of the spring wound member 140, the protrusion member 142 is formed up and down.

The spring spring 150 is inserted into the protruding member 142 of the spring winding member 140, and one end thereof is formed in a ring shape so as to be caught by the protruding member 142, so that the spring winding member 140 is When rotated, the protruding member 142 presses one end of the spring 150 to wind the spring 150 inside.

The spring fixing member 160 is for fixing the other end of the spring spring 150, one end of which the locking groove 162 of a predetermined depth is formed in the longitudinal direction, the other end is a wrench groove 164 It is formed in the longitudinal direction, the top of the wrench groove 164 and the fitting groove 166 is formed in the vertical direction is formed so that the locking groove 162 is inserted into the other end of the spring spring 150 is inserted.

The second cover 170 has a plurality of through-holes 172 corresponding to the fitting groove 166 of the spring fixing member 160 formed in the circumferential direction on the outer circumferential surface thereof, It is screwed into the main body 105 to seal the two openings 103 (Fig. 1). The spring fixing member 160 is inserted into the second cover 170, and the fitting pin 166 and the through hole 172 to face the spring fixing member 160 are fixed to each other. Insert and fix 177).

In particular, when the wrench (not shown) is coupled to the wrench groove 164 formed in the spring fixing member 160 before the fixing pin 177 is rotated, the spring fixing member 160 is wound into the spring. The other end of the spring can be rotated to tighten or loosen the spring. Therefore, since the spring pressure can be adjusted, the opening and closing speeds of the doors can be increased or decreased.

For example, if the spring is loosened by rotating the spring fixing member 160, the opening and closing of the door can be accelerated. If the spring is tightened by rotating the spring fixing member 160, the opening and closing of the door can be slowed. Therefore, after adjusting the spring pressure and fixing the fixing pin 177 to face the fitting groove 166 and the through-hole 172 to change the opening speed and closing speed of the door in the spring pressure is applied.

In addition, both ends of the shaft 110 are provided with a bearing 190 for smooth rotation of the shaft 110, the bearing 190 is the boundary portion 104 of the first cover 130 and the main body 105 Is inserted in the In addition, the first cover 130 and the boundary portion 104 are provided with an O-ring 180 for airtightness to prevent oil leakage introduced into the first opening 102 (FIG. 1).

The auxiliary cover 175 not described in the drawings is coupled to the through hole 172 of the second cover 170, the spring plate 155 is sandwiched between the spring, when the spring spring 150 is at least two or more Put it in.

Figure 5 is a side cross-sectional view showing a door closer according to the present invention.

Referring to FIG. 5, since the pedestal 106 and the ash front jaw 107 are formed inside the main body 105 of the housing 100, the pedestal 106 is the body 121 of the pivot valve 120. Supporting the anti-rotation jaw 107 limits the rotational angle of the rotation valve 120 by contacting the protrusion 122 of the rotation valve 120 when the rotation valve 120 is rotated. Here, the rotation angle of the rotation valve 120 is 180 °.

In addition, a compression spring 206, a steel ball 207, and a support part 208 are inserted into the through hole 205 (FIG. 2) penetrating the pedestal 106, and the support part 208 includes the through hole 205. It is screwed with 2) to support the compression spring 206 and the steel ball (207).

The rotary valve 120, the body 121 is formed with a concave groove 127. At least one groove 127 is preferably formed for safety when opening and closing the door. When the groove 127 and the steel ball 207 coincide with the rotation valve 120 rotates, the steel ball 207 is caught in the concave groove 127 by receiving the elasticity of the compression spring 206 and the rotation valve The rotation of 120 is stopped. Accordingly, if the groove 127 and the steel ball 207 coincide with the rotation valve 120 rotating, the door is stopped while the door is opened or closed, thereby preventing the door from automatically closing and injuring. It is possible to, and because it does not need to install a separate door stopper installed in the lower door has the effect of reducing the additional cost burden.

In addition, the protrusion 122 of the rotation valve 120 is formed with a first through hole 123 and a second through hole 124 having a larger diameter than the first through hole 123 so that oil can pass therethrough, A check ball 125 having a size that cannot pass through the first through hole 123 is inserted into the second through hole 124, and the check ball 125 does not exit from the second through hole 124. A fixing member (not shown) blocking the two through holes 124 is coupled. The fixing member (not shown) is preferably to couple the pin to the inlet side so that a portion is opened so that oil can be introduced without completely closing the inlet of the second through hole (124). When the rotation valve 120 is rotated, the check ball 125 selectively opens and closes the second through hole 124 to allow oil to circulate quickly according to the rotation direction.

That is, when the rotation valve 120 rotates in the clockwise direction, the oil located in front of the rotation valve 120 flows into the second oil hole 203 by hydraulic action and passes through the oil circulation path 201. It flows out into the first oil hole 202. The oil located in front of the rotation valve 120 is to move to the rear. Here, since the flow of oil to the first oil hole 202 along the second oil hole 203 passes through a narrow passage, the rotational speed of the rotation valve 120 is inevitably low. Accordingly, when the through holes 123 and 124 are formed in the protrusion 122 of the pivot valve 120, the oil can pass through the through holes 123 and 124 as well as the second oil hole 203, thereby providing a rapid oil circulation. Will be. Due to this action, the opening speed and the closing speed of the door are greatly improved, and if the second opening 124 is selectively opened and closed, there is an effect of controlling the change in speed when the door is opened or closed. On the other hand, as shown in the figure when the rotation valve 120 rotates in the clockwise direction, the door is closed.

In addition, a flow rate adjustment screw (not shown) is coupled to the oil hole 200 of the main body 105, and when the flow rate adjustment screw (not shown) is tightened or loosened, oil may pass through the second oil hole 203. When the second oil hole 203 is blocked or opened to control the amount of oil passing through. Therefore, the use of the flow rate adjustment screw (not shown) can cause the door to be closed tightly or slowly.

As described so far, the door closer of the present invention can automatically close the door as well as stop the door in the open state, there is an advantage that the size is smaller than the conventional door closer is relatively easy to install.

While the invention has been described in detail in the foregoing embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the invention, and such modifications and variations belong to the appended claims.

As described above, the door closer according to the present invention has the effect of reducing the manufacturing cost and improving the work productivity by miniaturizing its size by using a spring and a rotation valve.

In addition, the door closer according to the present invention has the effect of automatically closing the door as well as can be stopped in the open state.

Claims (10)

In the door closer function to automatically close the door, The lower part has a mounting part formed in a horizontal plate shape so as to be mounted on the door, and the upper part has a first opening part and a second opening part formed on both sides, and a cylindrical part having a boundary portion separating the first opening part and the second opening part therebetween. A housing including a body; A shaft having one end inserted into the main body boundary part and positioned at a second opening part, and the other end being located outside the first opening part; A circular valve fixed to the shaft and a protruding portion contacting the inner circumferential surface of the main body above the body, the rotating valve being positioned in the first opening and rotating along the inner circumferential surface of the main body; A first cover coupled to the inside of the main body to seal the first opening of the main body and inserted into the shaft; A spring winding member inserted into the second opening of the main body and fitted with one end of the shaft, and having a protruding member formed on an outer circumference thereof; A spring that is inserted into the protruding member of the spring winding member and whose one end is formed in a ring shape so as to be caught by the protruding member and is wound when the spring winding member rotates; A spring fixing member having a locking groove having a predetermined depth formed in the longitudinal direction to fix the other end of the main spring and inserted into the main spring; And A second cover coupled to the inside of the main body to seal the second opening of the main body and integrally fixed to the spring fixing member; It is configured to include, When the door is opened by connecting the shaft with the rotating shaft connected to the door frame, the shaft rotates to wind the spring and open the door, and when the hand is released from the door after the door is opened, the door is automatically closed due to the restoring force of the spring. Door closer, characterized in that. The method of claim 1, The first cover and the boundary portion is a door closer, characterized in that the bearing is inserted into the insert for smooth rotation of the shaft. The method of claim 1, The main body of the housing A pedestal protruding upward from the lower center of the first opening of the main body and supporting the pivoting valve, and a rotation prevention jaw formed at both sides of the pedestal; And the protrusion of the pivot valve contacts the anti-rotation jaw when the pivot valve rotates to stop the rotation and rotate the pivot valve within a predetermined angle range. The method of claim 3, wherein The through hole is formed in the pedestal of the main body, A compression spring is inserted into the through hole, and a steel ball is provided at an upper end of the compression spring, and a support part is provided at the lower end of the compression spring to support the compression spring. The body of the rotary valve is formed with a concave groove on the outside so as to match the circumference of the steel ball, the door closer is characterized in that the steel ball is caught in the groove when the rotary valve rotates to stop the rotation of the rotary valve. The method of claim 4, wherein And at least one groove formed in the rotation valve. The method of claim 3, wherein At the boundary of the main body An oil sphere formed outside the boundary to allow oil to flow in; An oil circulation path extending from the oil sphere to the anti-rotation jaw and circulating the introduced oil; A first oil hole communicating with the oil circulation path between the pedestal and the anti-rotation jaw positioned on the left side of the pedestal; A second oil hole communicating with the oil circulation path between the pedestal and the anti-rotation jaw positioned on the right side of the pedestal; And A flow rate adjusting screw which opens and closes the oil sphere, and regulates the amount of oil passing through the first oil hole or the second oil hole and the oil circulation path to reduce the rotational speed of the rotation valve; It is configured to include, When the oil is introduced into the oil sphere, the oil circulation path flows to the first oil hole and the second oil hole, so that the first opening is filled with oil, and when the rotation valve rotates, the oil flows in the direction of rotation. And an oil flows into the oil hole or the second oil hole to flow the oil circulation path, and then repeats the circulation of oil flowing into the second oil hole or the first oil hole. The method of claim 6, The protrusion of the rotary valve A first through hole through which oil passes, and a second through hole having a diameter larger than that of the first through hole, a check ball having a size that cannot pass through the first through hole is inserted into the second through hole. It characterized in that the fixing member for blocking the second through hole is coupled so that the check ball can not escape from the second through hole, And the check ball selectively opens and closes the second through hole according to the rotation direction when the rotation valve rotates, so that the oil can circulate quickly. The method of claim 6, The first cover, the boundary portion is a door closer, characterized in that provided with an O-ring for airtight to prevent oil leakage introduced into the first opening. The method of claim 1, Wrench groove is formed on the opposite side of the locking groove formed of the spring fixing member, the door closer, characterized in that to adjust the spring pressure of the spring spring by rotating the wrench into the wrench groove. The method of claim 9, The outer circumferential surface of the second cover is formed with a plurality of through holes in the circumferential direction, the spring fixing member is formed with a fitting groove corresponding to the through hole to adjust the spring pressure by rotating the spring fixing member, the fitting groove Door closer to the through hole characterized in that it is fixed by a fixing pin.

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