KR20020030692A - Improved vertical type door closer - Google Patents

Abstract

PURPOSE: A vertical door closer able to rapidly open and slowly close when the door is opened and/or closed, respectively, to ensure prevention of noise caused by the door and convenience of a user is provided. CONSTITUTION: The door closer(3) comprises a cylinder(31), a pin frame(34) placed in the cylinder(31) to deliver rotation of the door; a support spring(33) to support a relative rotation between the door and the pin frame(34); and a bottom cap(39) to close lower end of the cylinder(31). The door closer further includes a piston(32b) with grooves(322b) on a hole(321b). The bottom cap(39) has a vertical projection(393) passing through the piston(32b) and inserted into a hole of the pin frame(34). The door closer may have an elastic spring between the piston(32b) and the cap(39), a passage(37) together with a check valve(371).

Description

Vertical door closer with enhanced functionality {IMPROVED VERTICAL TYPE DOOR CLOSER}

The present invention relates to a door closer with enhanced function as a vertical door closer to prevent noise by the door and to ensure the convenience of the user by allowing the door to be opened quickly and closed slowly by the hydraulic pressure when the door is opened. Invention.

Door closers allow the doors to close automatically, and are now widely used for the automatic closing of general entrance or fire doors in office and residential buildings, and thus many suggestions and improvements have been made, for example, The initial horizontal door closer is to limit the closing speed of the door by translating the piston inside the body installed horizontally through the rotation of the link, the most simply to realize the function, the length of the body, The links were quite large, protruding from the doors and door frames, damaging the appearance of the doors and the risk of safety accidents.

A number of vertical door closers devised to solve this problem have been proposed, including their own invention, but the earliest form is as shown in cross-section in Figure 7, which is composed of a substantially cylindrical extending in the vertical direction A piston 102 elastically pushed upward by a spring 103 is installed in the cylinder 101 in which the working fluid is stored. The piston 102 has a spline key 102a protruding outward from the cylinder. The rotation is prevented by the key groove 101a formed inside the 101, and the screw groove 102b is formed inside.

On the other hand, the pintle 104 extending to the outside of the cylinder 101 is coupled to the first bracket (B1), the upper side of which is connected to the door frame, the screw groove 102b of the piston 102 on the lower outside The multi-threaded screw 104a is formed to be engaged with the multi-thread. Meanwhile, the cylinder 101 is coupled to the second bracket B2 on the door side.

A rib 105 is formed at one side of the cylinder 101 to form a flow path 106 for movement of the working fluid, and the flow rate of the working fluid is adjusted by the adjusting screw 107. . The remaining reference numeral 108 is an end cap, 109 is a check valve, and 110 is a set screw groove.

Such a conventional vertical door closer is prevented by the spline key 102a and the key groove 101a when the second bracket B2 rotates the cylinder 101 with respect to the pintle 104 by opening the door. The piston 102 is moved downward while pressing the spring 103 instead of rotation.

After the external force applied to the door is removed, the piston 102 is raised by the restoring force of the spring 103. At this time, the working fluid is narrowed through the inlet flow path 106c with the check valve 109 blocked. The closing speed of the door is limited because it is returned to 106a, and after the piston 102 passes through the tip of the first return flow path 106a, the working fluid is moved to a narrower second return flow path 106b, so that the door is closed. Is decelerated and buffered.

The cylinder 102 is coupled to the second bracket (B2) connected to the door to operate integrally with the bar, in the above conventional configuration, the combination of both as shown in Figure 3, the second bracket ( A plurality of protrusions 11 are formed on the outer circumference of the connection head H2 of B2), and a protrusion jaw 112 having a coupling groove 113 engaged with the protrusion 111 is formed at the upper end of the cylinder 101. have.

Meanwhile, since the pintle 104 in the cylinder 101 is coupled to the first bracket B1 connected to the door frame as described above, when the user opens the door, the cylinder 101 coupled thereto rotates so that the pintle 104 and the cylinder are rotated. 101 is relatively rotated, and thereby the automatic closing operation is achieved by the piston 102 coupled to the pintle 104 by the multi-threaded screw 104a is lowered.

However, the above-described conventional initial vertical door closer has various problems. For example, since the rotational motion must be converted to the up and down motion by the multi-threaded screw and vice versa, severe wear is likely to occur when the surface contact between the spirals is small. The durability of the multi-threaded screw is also vulnerable to hand wear because the rotation of the door is limited to 180 ° so that the movement of the movement must be made within this angle. As the spring stored in the cylinder is compressed and restored, it is used as a restoring force to close the door again with its force. The spring stored in the small cylinder can not only be made smaller, which increases the elastic modulus of the spring and thus the smooth door closing. There is a problem that cannot be obtained.

In addition, the vertical door closer of the patent application No. 2000-44264, which is my patent application has developed and presented various types of door closers, one of which has the most similar structure to the present invention, as shown in FIG. A cylinder 31 which forms a space in the center of the inner surface, a pintle 34 accommodated in the cylinder 31 to transmit the rotation of the door 2, and between the cylinder 31 and the pintle 34 In the door closer (3) consisting of a spring (33) and a lower stopper (39) sealing the lower end of the cylinder (31), the lower end of the pintle (34) is inclined at a predetermined angle so that its bottom surface is a smooth surface. A retainer 322a which is symmetrically attached to both lower ends of the lubricating surface 321a which is in contact with the smooth surface 341 and the retainer 322a, respectively; Wan made of piston rod 323a for sealing 324a It consists of the flow path 37 which communicates between the charging tool 32a and the small cylinder 324a of the both sides of the said buffer hole 32a.

Therefore, the rotational force is changed up and down according to the inclination angle between the smooth surface 341 and the lubricating surface 321a, wherein the fluid flow path 37 between the two retainers 322a installed at the lower end of the lubricating surface 321a It is to reduce the speed while passing through the door, while the previous door closers need to be filled with oil only in the two small cylinders 324a built in the cylinder 31, while the structure of the entire cylinder 31 should be filled with oil. Since it is a structure to be filled, it is easy to provide a closed structure, so that it is easy to compact and economical, and its operation is much smoother, but it is economical to form two retainers 322a and a flow path 37 in a small buffer opening 32a. There is difficulty.

The present invention has been made to solve the above problems, the primary problem is to ensure a smooth and smooth operation while providing a vertical door closer that the door is automatically closed can prevent the source of noise or safety accidents to occur In addition, it was developed to improve the performance as an automatic door closer, while compacting its structure and increasing its durability and performance, and in addition, to complete the present invention to provide a high-efficiency door closer. It will be described in detail with reference to the drawings to solve the problem by specifying and dedicated to.

1 is a development state of the configuration of the present invention,

2 is an assembled cross-sectional view of the present invention;

3 is an installation state diagram of the present invention,

4 is an extract of another configuration of the present invention,

5 is another configuration of the present invention,

6 is an installation state diagram of FIG.

7 is a cross-sectional view of the configuration state of the prior art,

8 is another development state of another conventional invention.

Explanation of Signs of Major Parts of Drawings

Door frame 11. Attachment 12. stopper

2. Door 21. Attachment 22. stopper

3. Door closer H. (Butterfly type) hinge

30. O-Ring

301. Stop ring 302. Bush303. Wekala

304. Bottom color

31. Cylinder

311.Top Cap 312. Lower cap 313. Spring yo groove

32a. Buffer 321a. Lubricating surface 322a. Retainer

323a. Piston rod 324a. Small cylinder

32b. Piston 321b. Shaft hole 322b. Vertical groove

33. Torsion Springs 331. Tange Spring 332. Restoration Spring

34. Pintle 341. Smooth surface 341a. Involute Curved Surface

342. Axis hole 343. Spring grooves 344. Pivot

35. Upper Oil Room

36. Lower Oil Room

37.Euro 371. Check valve 371a. Ball 371b. Check Spring

38.Adjusting rod 381. Taper section 382. Helix 383. Head

384. jig

39. Bottom cap 391. Helix 392. Axis 393. Vertical projection

101. Body 101a. Keyway 102. Piston 102a. Spline key

102b. Thread groove 103. Spring 104. Pintle 104a. Multi-threaded screw 105. Rib106. Euro 106a. First return path 106b. Second return path 106c. Entrance

107. Adjusting screw 108. End Cap 109. Check valve 110. Set screw

B1. First bracket B2. Bracket 2

Figure 1a is an exploded view of the configuration of the present invention, Figure 2 is a cross-sectional view showing a cross-sectional view in the vertical direction in the assembled state of the present invention, Figure 3 is an installation state of the present invention.

As shown in the drawing, a cylinder 31 which forms a space in a central portion of an inner surface, a pintle 34 which is accommodated in the cylinder 31 and transmits the rotation of the door 2, and the cylinder ( In the door closer (3) consisting of a spring for supporting the rotation between the 31 and the pintle (34), and a lower cap (39) for sealing the lower end of the cylinder (31), the spring is a torsion spring (33). To support the relative rotation between the door 2 and the pintle 34, the lower surface of the pintle 34 is a smooth surface 341 is formed to be inclined at a predetermined angle, the support shaft hole 342 in the center And a piston 32b having an upper surface facing the smooth surface 341 and having a plurality of vertical holes 322b vertically formed in the center thereof, and having a lower hole 39 formed therein. Vertical projections 393 coinciding with the vertical grooves 322b on the outer circumference of the support shaft 392 protruding from the upper center A tangential spring 331 which is formed and is inserted into the support shaft hole 342 of the pintle 34 through the piston 32b, and inserted between the piston 32b and the bottom cap 39, and the piston 32b. It characterized in that it consists of a flow path 37 is installed in the communication path between the upper and lower oil room (35, 36) formed on the upper and lower sides of) and the check valve 371 is installed in the other communication path.

Figure 1b is another development state of the present invention

In the above configuration, the smooth surface 341 is divided in the center so that both sides are inclined opposite to each other, and the upper surface of the piston 32b is formed to be in contact with the smooth surface 341 inclined to both sides. Is preferable.

In the above-described configuration, it is further characterized in that the attachment rod 38 is attached to the bottom cap 39 so as to adjust the opening and closing area of the flow passage 37 on the flow passage 37. desirable.

In the above configuration, the lower collar 304 is inserted into the lower end of the pintle 34 as the rotation material, and the upper collar 303 is inserted into the upper end of the pintle 34 together with the bush 302 as the rotation material. More preferably, the stop ring 301 is inserted into the tip of the pintle 34 to limit the rotation of the pintle 34 is added.

4 is an excerpt excerpt illustrating another configuration of the present invention.

In the above configuration, it is more preferable that the smooth surface 341 at the lower end of the pintle 34 and the upper surface of the piston 32b are formed of an involute curved surface 341a curved to a predetermined diameter.

Figure 5 is another configuration of the present invention, Figure 6 is an installation of another configuration of the present invention.

According to the present invention, a cylinder (31) which forms a space in the center of the inner surface, a pintle (34) which is stored in the cylinder (31) and transmits the rotation of the door (2), and the cylinder (31) and the pintle (34) In the door closer (3) consisting of a spring for supporting the rotation between the shaft and a bottom cap (39) sealing the lower end of the cylinder (31), the spring for supporting the rotation is installed on the other side of the door (2) Restoring spring 332 inserted into a conventional hinge (H) is a, the lower surface of the pintle 34 is a smooth surface 341 is formed to be inclined at a predetermined angle, the support shaft hole 342 is formed in the center thereof And a piston 32b having a top surface facing the smooth surface 341 and having a plurality of vertical grooves 322b vertically formed in the center thereof, and having a piston 32b formed therein, and the lower stopper 39 having a center thereof. Vertical protrusions 393 coinciding with the vertical grooves 322b are formed on the outer circumference of the support shaft 392 protruding upwards. Tangier springs 331 inserted into the support shaft 342 of the pintle 34 through the stone 32b, and inserted between the piston 32b and the bottom cap 39, and the upper and lower sides of the piston 32b. It characterized in that it consists of a flow path 37 is installed in the communication path between the upper and lower oil room (35, 36) formed in the check valve 371 is installed in the other communication path.

One configuration of the present invention configured as described above is installed as shown in FIG. 3 and functions as follows. First, the installation of the present invention will be described as follows, which represents an example of various installation specifications. It is obvious that even if the specification in the form not described by adding other auxiliaries and the like does not depart from the technical scope of the present invention.

First, the seat frame 11 is installed on the side of the mounting hole 11 is installed and the mounting hole 11 is inserted into the recess (of course, it may be attached without the recess, but in this case, the mounting hole 11 It protrudes from the frame 1 and is not preferable in terms of beauty or function} After fastening by fixing with a predetermined number of screws, and attaching the mounting holes 21 to the door 2 side in the same manner as above (of course the door to which the present invention is applied ( 2) and the door frame 1 is provided with attachments 11 and 21 are already attached, but here will be described an example that is applied to a general door to show that even a conventional door can be applied}, the door opening ( 11, the pivot 344 inserted into the upper end of the pintle 34 is inserted and supported (in this state, the door 2 is supported by the hinge of the lower part of the door 2 and the door closer 3 of the upper part of the door 2). ) Can be kept in the state fixed to the door frame (1)}, the mounting hole 21 on the door (2) side The cylinder 31 is supported, and then the installation is completed by fastening the stoppers 12 and 22, respectively. At this time, the upper end of the torsion spring 33 may pass through the upper end of the cylinder 31 on the side of the door 2 so as to be inserted into the fitting opening 21, but the mounting opening 21 is usually attached to the cylinder 31. Since it is provided in a coupled state, for convenience in installation, it is preferable to form a spring recess 313 inside the upper end of the cylinder 31 and insert it therein. Insert the torsion spring 33 in one groove first, and only the process of installing the attachment hole 21 in the door need be added. In addition, the pivot 344 is preferably installed so that the through hole through which the upper end of the pintle 34 passes is formed in the center, so that the pivot 344 does not go down to the "E" shaped ring as shown in the figure.

Referring to the function of each part of the present invention installed as described above in detail.

According to one configuration of the present invention, a cylinder 31 which forms a space in the center of the inner surface, a pintle 34 which is accommodated in the cylinder 31 to transmit the rotation of the door 2, and the cylinder 31 And a door closer (3) consisting of a spring for supporting rotation between the pintle (34) and a bottom cap (39) for sealing the lower end of the cylinder (31). Basic hardware configuration.

In addition, the spring is used as a torsion spring 33 to support the relative rotation between the door 2 and the pintle 34. The prior arts of the present invention support only the compression force and the torsional moment of the spring. In the present invention, the torsion spring 33 is a dedicated torsion spring 33 that supports only the torsion, and the compression force is specialized to fully support the tangy spring 331 to be described later. Since the door 2 is supported by a small force compared to the conventional inventions, the door 2 can be opened with a small force, and when it is closed, it is soft and closes to the end, which is durable, smooth and reliable opening and closing operation. To ensure.

In addition, a lower surface of the pintle 34 is a smooth surface 341 which is formed to be inclined at a predetermined angle, and a support shaft 342 is formed at the center thereof, and further, an upper surface facing the smooth surface 341. When the user opens the door 2 by the coupling with the piston 32b in which the shaft hole 321b having a plurality of vertical grooves 322b formed vertically in the center thereof is opened, the door frame 1 and the door 2 are opened. Relative rotational movement of the acting, which is the relative rotational movement between the pintle 34 installed on the door frame (1) and the cylinder 31 installed through the attachment port 21 on the door 2 side, the pintle 34 Torsion spring 33 is inserted and supported between the spring groove (343) and the spring groove (313) formed on the upper end of the cylinder (31) perforated on the upper surface of the smooth surface (341) to relieve or strengthen the opening speed {If pre-tension is applied to the torsion spring 33 to the opposite side of the opening, the opening speed may be increased. It is possible to offset the static frictional force due to the weight of the fish 2} At this time, the smooth surface 341 is rotated relative to the inner circumference of the cylinder 31, the smooth surface 341 is inclined at a predetermined angle when rotating As a result of coincidence with the inclined surface of the piston 32b facing the lower portion of the piston 32, it is raised by the holding force of the tangential spring 331 described later. In addition, the inclination angles of the smooth surface 341 and the upper surface of the piston 32b may be formed at various angles so as to match the opening and closing speeds according to the opening and closing speeds of the doors 2 and the opening angles. An involute curved surface 341a.

In addition, the lower stopper 39 is formed on the outer periphery of the support shaft (392) protruding toward the center of the vertical projection (393) is formed so as to penetrate the piston (32b) to the pintle ( It is inserted into the support shaft 342 of the 34, and the stop spring 331 is inserted between the piston 32b and the bottom cap 39, the upper and lower vibrations of the piston 32b by the support shaft 392 In addition, the coupling between the vertical grooves 322b and the vertical protrusions 393 is not limited to the up and down, but the rotation is limited so that the piston 32b does not rotate and the holding force and the smooth surface 341 of the tangent spring 331. And the upper and lower lines governed by the positional relationship between the inclined surface of the upper surface of the piston 32b. In this case, the coupling between the vertical grooves 322b and the vertical protrusions 393 is presented as a means for guiding only the up and down movements without rotation, and, for example, a combination of one protrusion between them and the slot groove receiving them is replaced. The same effect can be obtained, but the present invention will be described with only the most preferred embodiment, and thus does not describe the disadvantage that the durability is reduced by configuring one projection and the slot groove, and the lower plug 39 and the cylinder ( 31) Coupling with the member of his or her application to form a spiral (391) to be combined, but in the present invention does not have a particular limitation, any combination structure, such as a steel or other keying or bolting after insertion by screwing or force Can be adopted.

In addition, there is a check valve 371 provided in a communication path different from the flow path 37 provided in the communication path between the upper and lower oil rooms 35 and 36 formed above and below the piston 32b. The upper and lower oil rooms 35 and 36 that are isolated by the oil change in volume as the piston 32b moves up and down, so that the oil filled therein moves along the flow passage 37, and the preferred position of the flow passage 37 is shown. As shown in the figure, the outer periphery of the lower axis of the support shaft 392 is to be perforated to its upper end. In this case, the flow path 37 ends at the upper end of the support shaft 392, but the pintle 34 accommodates the upper end of the support shaft 392. The axis hole 342 drilled on the smooth surface 341 of the () is a diameter slightly larger than the axis 392 (or may form a separate flow path), so that the flow path 37 is formed between the upper and lower oil rooms 35 and 36. Are communicated with each other, and the cross-sectional area of the flow path 37 is adapted to the appropriate closing speed of the door. The closed speed is constantly limited, and the function of the door closer is to open quickly upon opening, but to allow a gentle speed upon closing, so that a separate communication path is formed on the piston 32b to open quickly. Therefore, the check valve 371 is installed. In addition, when the O-ring 30 or other known sealing means is interposed between the outer circumference of the piston 32b and the inner circumferential surface of the cylinder 31, the efficiency thereof can be further improved. In the case of having a square foot shape, it is possible to install a communication path having the flow path 37 and the check valve 371 using the edge of the outer circumference where the pintle 34 is rotated. It is clear to the expert that such modifications are within the technical scope of the present invention.

In addition, the check valve 371 is supported by a check spring 371b (shown in Fig. 3) located at the upper oil room 35 side, so that the oil is provided at the lower oil room 36 at the upper oil room 35 side. The flow to the side is not limited, but the reverse flow blocks the second flow path to slow the moving speed of the oil, which causes the door 2 to close slowly because the direction of the door 2 is closed. Of course, depending on the direction of action, the reverse is also possible)

Reference numeral 311 is to close the top of the cylinder 31 with the upper cap, 312 is to close the bottom of the cylinder 31 with the lower cap, they are formed to be removable.

According to another configuration of the present invention, in the configuration described above, the smooth surface 341 is divided in the center so that both sides are inclined opposite to each other, and the top surface of the piston 32b is also inclined to both sides. It is formed so as to adhere to, which is relatively rotated while facing between the smooth surface (341) and the upper surface of the piston (32b) when the piston (32b) is up and down by the height difference, both sides are the same and opposite moments ( Pairing) is made to ensure that the upper and lower vibration of the piston (32b) is made quietly, while preventing uneven wear to increase the durability. And, in Figure 2b is shown in the form of the spring groove 343 is opened to the side, which is for convenience of assembly, there is no difference in function of the lower hole and the spring groove groove 343, and in addition, pintle in this figure Although a separate flow path 37 was drilled on the 34 side, this also has no difference from the basic configuration.

According to another configuration of the present invention, in addition to the above-described configuration, the control rod 38 is installed on the bottom plug 39 to be attached to the lower plug 39 so as to adjust the opening and closing area of the flow path 37. In this case, the adjustment rod 38 is configured to be driven from the center of the lower stopper 39 to the upper side as shown, for example, and is attached with a cuboidal shape or a spherical shape at the top and a lower stopper. Consists of a spiral portion 382 to be screwed to (39) and a jig portion 385 formed in the head portion 383 to transmit the rotational force, the O-ring 30 is inserted into the head portion 383 as a sealing means In this case, the front end of the door closer (3) is controlled by controlling the amount of outflow by controlling the amount of oil outflow by a certain amount or less by blocking the part or the whole so that the tip has a cross-sectional area that matches the cross-sectional area of the flow path (37). Opening and closing speed can be adjusted .

According to another configuration of the present invention, in addition to the above configuration, the bottom collar 304 is inserted into the lower end of the pintle 34 as a rotating material, and the upper collar 303 is bushed at the upper end of the pintle 34. 302 is inserted into the rotational material, the lower collar 304 is the torsion spring 33 is twisted to rotate when the winding diameter is changed, so the torsion spring 33 bites the pintle 34 pintle 34 The upper collar 303 is inserted into the upper end of the pintle 34 to seal the upper end of the cylinder 31 so that the oil filled therein does not leak. In this case, the bush 302 is interposed therebetween in order to reduce friction between the upper collar 303 rotating together with the pintle 34 and the upper end of the cylinder 31.

In addition, since the stop ring 301 is inserted into the tip of the pintle 34 to limit the rotation of the pintle 34 is added, the pre-tension (torsion force pre-imposed to the torsion spring 33 at the time of assembly, the forward direction) Or both in the reverse direction), in which the upper end of the pintle 34 is formed in a hexagon and the hexagon hole into which it is inserted is formed in the center thereof, while extending one end of the cylinder 31. The structure formed so that it may be supported by a wall was illustrated.

According to another configuration of the present invention, in addition to the above configuration, the smooth surface 341 at the lower end of the pintle 34 and the upper surface of the piston 32b are formed of an involute curve surface 341a in which a predetermined diameter is curved. In this case, the involute curve refers to a curved surface that forms a spiral shape. For example, the involute curve rises and falls while rotating at an inclination of about 20 ° along the circumference. When the door 2 is first opened, it guarantees a large amount of up and down even under a small opening angle, thereby giving a large force to overcome the static friction force, and at the last opening, softening the stop of the door 2. When closing, it is possible to overcome the resistance to the last door to complete the closing of the door (2).

In addition, it is described that the relative rotation between the door (2) and the door frame (1), as shown in Figure 4 when the door closer (3) of the present invention is attached in the forward direction, the cylinder 31 is a door ( 2) and the pintle 34 is fixed to the door frame 1, so that the cylinder 31 is rotated with respect to the pintle 34, the cylinder 31 when the door closer 3 of the present invention is attached in the reverse direction ) Is attached to the door frame (1) and the pintle 34 is inserted into the door (2) interlocked, so that the pintle 34 is rotated relative to the cylinder 31 is described as relative rotation, installed in any state described above It is also obvious that there is no functional difference at all.

Another configuration of the present invention is a structure in which the torsion spring 33 is excluded from the basic configuration of the present invention, which is to be installed when used as a conventional butterfly hinge (H) as shown in FIG. The butterfly-shaped hinge H is provided with a restoring spring 332 for exerting a force to always fold the hinge H (the direction in which the door is closed), and this force replaces the function of the torsion spring 33 described above. In this case, even if the basic configuration (torsion spring built-in type) of the present invention is applied, there is no problem. However, if the torsion spring is omitted, the cylinder 31 can be made more compact, thereby improving economic efficiency. The door closer 3 of the present invention configured as described above may adopt a structure in which the attachment port 21 is directly attached to the cylinder 31, as shown in FIG. (1) It is the mounting opening (11) of the side also preferred to maximize the economic efficiency and functionality Sikkim kiwoseo the pivot 344 directly attached thereto.

The present invention provides a vertical door closer in which the door is automatically closed, to ensure the smooth and smooth operation of the door to prevent the source of noise or safety accidents, and to improve the performance as an automatic door closer It is a useful and effective invention that makes the structure compact while increasing its durability, performance and economy.

Claims (6)

The cylinder 31 which forms a space in the center of an inner surface, the pintle 34 accommodated in the cylinder 31, and transmits the rotation of the door 2, and the rotation between the cylinder 31 and the pintle 34 In the door closer (3) consisting of a spring to support and a bottom cap (39) sealing the lower end of the cylinder (31), The spring is used as a torsion spring 33 to support relative rotation between the door 2 and the pintle 34, The lower surface of the pintle 34 is a smooth surface 341 is formed to be inclined at a predetermined angle, the support shaft hole 342 is formed at the center thereof, A piston 32b having an upper surface facing the smooth surface 341 and having a shaft hole 321b formed therein with a plurality of vertical grooves 322b perpendicular to the center thereof; The lower stopper 39 is formed on the outer periphery of the support shaft 392 protruding toward the center of the vertical projection (393) to coincide with the vertical groove (322b) through the pin 32 (34) Is inserted into the shaft hole 342 of the Tangier spring 331 is inserted between the piston 32b and the bottom cap 39, A check valve 371 provided in a communication path different from the flow path 37 provided in the communication path between the upper and lower oil rooms 35 and 36 formed above and below the piston 32b; Vertical door closer with enhanced functionality, characterized in that consisting of. The method of claim 1, The smooth surface 341 is divided in the center and both sides are inclined opposite to each other, and the upper surface of the piston 32b is also formed to face the smooth surface 341 inclined to both sides is enhanced vertically enhanced Type door closer. The method according to claim 1 or 2, Reinforced vertical door, characterized in that the attachment is attached to the lower end plug 39 is installed on the flow path 37 to adjust the opening and closing area of the flow path (37) Closure. The method according to claim 1 or 2, A lower collar 304 is inserted into the lower end of the pintle 34 as the rotating material, and an upper collar 303 is inserted into the upper end of the pintle 34 together with the bush 302 as the rotating material. The function of the vertical door closer is characterized in that the stop ring 301 is inserted into the tip of the pintle (34) to limit the rotation of the pintle (34) is added. The method according to claim 1 or 2, The vertical door closer with enhanced function, characterized in that the smooth surface (341) of the lower end of the pintle (34) and the upper surface of the piston (32b) is formed of an involute curved surface (341a) to be curved to a predetermined diameter. The cylinder 31 which forms a space in the center of an inner surface, the pintle 34 accommodated in the cylinder 31, and transmits the rotation of the door 2, and the rotation between the cylinder 31 and the pintle 34 In the door closer (3) consisting of a spring to support and a bottom cap (39) sealing the lower end of the cylinder (31), The spring supporting the rotation is a restoring spring 332 inserted into a conventional hinge (H) installed on the other side of the door (2), The lower surface of the pintle 34 is a smooth surface 341 is formed to be inclined at a predetermined angle, the support shaft hole 342 is formed at the center thereof, A piston 32b having an upper surface facing the smooth surface 341 and having a shaft hole 321b formed therein with a plurality of vertical grooves 322b perpendicular to the center thereof; The lower stopper 39 is formed on the outer periphery of the support shaft 392 protruding toward the center of the vertical projection (393) to coincide with the vertical groove (322b) through the pin 32 (34) Is inserted into the shaft hole 342 of the Tangier spring 331 is inserted between the piston 32b and the bottom cap 39, A check valve 371 provided in a communication path different from the flow path 37 provided in the communication path between the upper and lower oil rooms 35 and 36 formed above and below the piston 32b; Vertical door closer with enhanced functionality, characterized in that consisting of.