KR200165486Y1 - Vertical type door closer - Google Patents

Abstract

The present invention discloses a vertical door closer with a novel configuration.

In the conventional door closer, there is a problem that the cylinder service life of the aluminum die casting is short and it is difficult to satisfy the properties of the restoring spring due to the problem of wear of the rotational restraint. In the present invention, the corresponding bore of the piston and the cylinder is formed into a polygon to solve the problem of abrasion and damage, and both ends of the coil spring are coupled between the pintle and the piston to provide a linear restoring force and a torsion restoring force.

Description

Vertical Door Closer {VERTICAL TYPE DOOR CLOSER}

The present invention relates to a door closer, and more particularly to a vertical door closer.

Door closers, also called door checks, are widely used for the automatic closing of entrance doors or fire doors in office buildings and residential buildings.

In Fig. 1, a piston 201, which is elastically pushed to the closing side by a spring 202, is housed in the main body 200 of the door closer in which the working fluid is received and is oil-tight. A rack (203) is installed at one side thereof, and a shaft thereof is meshed with a pinion (204) coupled with a link (205).

A flow path 207 having a check valve 206 is formed inside the piston 201, and a large diameter of the first return flow path 208 and the small diameter is formed between the operation path and the return path of the piston 201. The two return flow path 209 is formed.

The main body 200 and the link 205 are fixed to the door and the door frame, respectively, when the door is opened for the door frame, the pinion 204 rotates and translates the rack 203 so that the piston 201 compresses the spring 202. It moves to the left side of the drawing.

After the external force applied to the door is removed, the piston 201 is returned to the right side of the drawing by the restoring force of the spring 202, where the piston 201 is provided when the tip of the piston 201 is in front of the first return passage 208. After the working fluid being pushed back through the first and second return passages 208 and 209, and the tip of the piston 201 passes through the first return passage 208, the second return passage 209 of the small diameter Only the working fluid is returned. Accordingly, the door is decelerated shortly before closing and gently closed to prevent the impact of the closing.

Such a door closer is a device commonly used in almost every building as it is commonly seen in everyday life, but it has been generally considered as a matter of course, but the problem is that the main body 200 is large and the link 205 protrudes so that the appearance of the door is very bad. have.

Accordingly, the door closer of the flush door, which is installed at the entrance of the building, is generally configured to be buried in the lower part of the door frame. In this case, foreign substances such as water during cleaning are introduced into the main body 200. There is a problem of severe corrosion and contamination to penetrate and maintain and disassemble and disassemble.

In order to prevent this, there have been attempts to embed the door closer in the upper door frame, but since the required torque for automatic closing of the door is considerable, the appearance of the upper door frame becomes large and deformation has not been put to practical use.

In another attempt, a hydraulic return device was installed inside the hinge between the door and the door frame, but the installation place of the device was too narrow to generate the required torque, and thus the success was not achieved.

What appeared to solve this problem is a vertical door closer as shown in Figure 2 (A), which is installed to replace the hinge between the door frame (F) and the door (D) of Figure 2 (A) In the example, a general hinge H is provided at the lower part and a vertical door closer K is installed at the upper part.

In Fig. 2B, as an example of the vertical door closer K, the configuration of the imported goods made in Japan is shown. However, the patent is unknown and is not a commercially available or commercially available configuration.

In FIG. 2B, a piston 102, which is formed in a substantially cylindrical shape extending in the vertical direction and is provided with a working fluid, is elastically pushed upward by a spring 103. The spline key 102a protrudes on the outside thereof to prevent rotation by the key groove 101a formed inside the cylinder 101, and the screw groove 102b is formed on the inside thereof.

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 A multi-threaded screw 104a is formed which is meshed with. 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 the 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.

Since such vertical door closers are in the early stages of practical use, they have various problems such as operation and reliability of the operation.

Among these problems, the problem due to the characteristics of the multi-threaded screw 104a is inevitably generated, and the multi-threaded screw 104a for changing the rotational movement into a translational movement is required stroke by rotation according to opening and closing of the door up to 180 °. Since the stroke must be operated, the pitch is very large.

Therefore, the translational stroke is sensitive to the adjustment of the angle, resulting in an operation characteristic in which the translation, that is, the lifting operation is easier than the rotational operation.

The problem caused by this is that the door is heard, the distance d between the two brackets (B1, B2) in Figure 2 is the distance between the door and the door frame is small as possible to block the entry of heat or noise It is preferable.

However, in the conventional vertical door closer, the pintle 104 and the cylinder 101 are coupled to the first and second brackets B1 and B2 so as to be rotated relative to each other, and the rotation shaft becomes the pintle 104 itself. If a slight resistance is applied, the lifting action is more easily generated by the characteristics of the multi-threaded screw 104a, and the door is lifted instead of rotating.

Then, the door is pinched in the door frame at a narrow gap (d) it becomes more difficult to automatically close the door. In our experiments, such door lifting may occur as severe as the entire lifting stroke of the pintle 104 in severe cases.

Such a problem can be closed by the user even if it is inconvenient in the case of a normal door, but in the case of a fire door, if the automatic closure is not made, it causes fatal consequences such as the spread of fire.

On the other hand, in the structure of FIG. 2B, the rotation of the pintle 104 by the opening of the door D is transmitted to the piston 102 through the multi-threaded screw 104a, and the piston 102 is the spline key 102a. Since the rotation is constrained by the key groove 101a of the cylinder 101, the spring 103 is pressed down and then the door D is automatically closed by the restoring force of the spring 103.

That is, since the opening and closing operation is made by the spring 103, the reliability of the automatic opening and closing also depends on the physical properties of the spring 103. Since the operating stroke of the piston [02] is short, the spring 103 is high (high). Since it can only be selected as the elastic standard, it is easy to cause yield and fatigue, and thus reliability of operation cannot be guaranteed.

In addition, since such a large elastic force is transmitted to the key groove 10a that restricts the rotation of the spline key 102a, the cylinder 100 formed with the key groove 10a is inevitably formed by die casting. The wear of the key groove 101a becomes severe according to the in-operation, and thus long-term operation life cannot be guaranteed.

On the other hand, the working fluid filled in the cylinder 101 is vaporized by the change of the internal and external temperature even in the sealed state, and can not be reduced gradually. If the working fluid is reduced, bubbles are generated in the cylinder 101 so that the damping force can be properly applied during the automatic closing. There is a problem that the closing of the flexible door (D) is not possible.

In view of such various problems in the related art, the present inventors have created a vertical door closer as shown in FIG. 3 and filed in Korean Patent Application No. 99-18357, issued on May 20, 1999. The first purpose of this design is to prevent the closing obstacle caused by the lifting of door during automatic closing, and to prevent the failure of the operation due to the hydraulic fluctuation. The second objective is not dependent on the properties of the spring and the key by the spline key. It is to provide a vertical door closer that can reduce the wear of the groove.

In order to achieve the first object of the present invention, the vertical door closer of the first application has a piston 302 elastically biased downward by the compression spring 303, which moves upward when the door D is opened and then moves downward. Since the restoring force of the spring 303 acts downward so that the restoring force of the spring 303 acts downward, it is pressed instead of hearing the door, so there is no closing obstacle, and even if bubbles are generated due to the reduction of the working fluid, the piston 302 operates downward so that the damping force is reduced. It will not cause problems in the provision.

The first application vertical door closer is provided with a torsion spring 310 between the pintle 304 and the cylinder 301 to achieve the second purpose, the torsion spring 310 provides a rotational restoring force to the pintle 304 It can be used together with the compression spring 303 to mitigate the change of the automatic closing characteristics according to the change of the physical properties of the spring 303, and at the same time to reduce the wear by distributing the load, resulting in excellent operating characteristics and durability and operation reliability It will provide a high vertical door closer. (Refer to the related descriptions of the corresponding part numbers in units of 100 and 200 of FIGS. 1 to 2 for the remaining unexplained symbols.)

However, the vertical door closer of FIG. 3 also has a spline key 302a having a rotational restriction of the piston 302 protruding at its outer circumference, as in other conventional vertical door closers. As you move along

The economical method of economically constructing a cylinder 101 having a complex internal and external configuration such as a key groove 301a is inevitably formed by aluminum die casting. As is known, aluminum is a soft material, and the key grooves 101a are inevitably worn down by the repeated operation of the piston 302. Accordingly, the operation life of the door closer is not limited because the spline key 302a cannot be restricted. This long term cannot be guaranteed.

In addition, the vertical door closer of Figure 3 has the advantages of excellent operating characteristics and high durability and operation reliability, but the combination of the two springs of the compression spring 303 and the torsion spring 310 is used to complicate the configuration of the door closer There is a problem of rising manufacturing costs.

In view of such a problem, an object of the present invention is to provide a vertical door closer that can maintain a stable operation for a long time even if it is composed of soft aluminum die casting to prevent wear of parts.

Another object of the present invention is to provide a linear restoring force and a torsion restoring force at the same time by unifying compression and torsion springs, thereby providing a vertical door closer that can be composed of a simple structure and inexpensive manufacturing cost.

1 is a schematic cross-sectional view showing the configuration of a typical door closer,

Figure 2 (A) is a schematic perspective view showing the configuration of a vertical door closer,

Figure 2 (B) is a cross-sectional view showing the configuration of a vertical door closer made in Japan on the market,

3 is a cross-sectional view showing the configuration of the applicant's prior application design,

4 is a cross-sectional view showing the basic features of the present invention,

5 is a cross-sectional view taken along line VV ′ of FIG. 4.

Explanation of symbols on the main parts of the drawings

1: cylinder 2: piston

3: compression spring 4: pintle

4a: multi-threaded screw 10: torsion spring

11: lever

The vertical door closer to achieve the first object of the present invention is a polygon of a polygon in which the outer surface of the piston which is lifted by the rotation of the pintle and the bore of the cylinder in which the piston is lifted and received by the pintle and the multi-threaded screw correspond to each other. It has a cross section.

Here, the polygonal cross section of the piston and the bore may be composed of a quadrangle, a hexagon, an octagon, and the like, and preferably, a four-corner rectangular section (an equilateral octagon). According to such a configuration, the limited contact area of the piston is not formed between the spline key and the groove, but is formed between a plurality of surfaces of the polygonal cross section, so that the contact pressure is significantly lowered. Thus, even if the cylinder is made of soft aluminum die casting, Wear and breakage are greatly reduced, allowing the door closer to operate stably for a long time.

In order to achieve the second object of the present invention, the vertical door closer according to the present invention is to couple and fix one end of the coil spring to the piston and the other end to the piston.

According to this configuration, when the pintle rotates according to the rotation of the door and the piston coupled with the multi-threaded screw is raised or lowered, the coil spring is compressed or tensioned, and the rotation of the piston is constrained so that the coil spring is twisted according to the rotation of the pintle. do. As a result, the coil spring provides not only linear restoring force (converted to rotational restoring force through multi-threaded thread) by compression or tension, but also torsion restoring force directly restoring to the pintle, thereby ensuring smooth return operation of the pintle and the door.

Therefore, the present invention provides a vertical door closer having a compact configuration that ensures a smooth automatic closing of the door for a long time.

(Example)

Such specific features and advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

4 shows an embodiment in which the first feature and the second feature of the present invention are implemented, and reference numbers and descriptions are given only for the essential parts of the understanding of the features of the present invention. However, the detailed configuration of FIGS. 4 and 5 shows 100 in the member number of FIG. Since a rule is deducted from 300 in the member number of FIG. 3, a configuration without separate reference numerals or descriptions will be referred to in FIGS. 2B and 3. All.

In FIG. 4, the cylinder 1 coupled to the door or the door frame side is housed with a pintle 4 coupled to the door frame or the door side and rotating relative thereto, and a multi-threaded screw 4a formed at the lower portion of the piston 2. It is screwed into the screw groove 2b. Means for the rotational restraint of the piston 2 include the spline keys 102a and 302a of the pistons 102 and 302 and the keyways 101 of the cylinders 101 and 301 in the conventional configurations of FIGS. 2B and 3. Instead of the engagement of a 301a, the outer surface of the piston 2 and the bore 1a of the cylinder 1 in which the piston 2 is received and lifted in accordance with the first aspect of the present invention is shown in FIG. As described above, it is characterized by having cross sections of polygons corresponding to each other.

Here, the polygonal cross section of the piston (2) and the bore (1a) may be configured in various forms, such as square, hexagon, octagon, etc., preferably consisting of a rectangular cross-section chamfered four corners as shown in FIG. Thus, it has an approximately equilateral octagonal shape.

According to this structure, the rotational restriction of the piston 2 is not made between the spline keys 102a and 302a and the key grooves 101 and a301a of a limited area as in the prior art, but also between a plurality of faces of the polygonal cross section. The contact pressure between the piston (2) and the cylinder (1) is greatly lowered because it is made of a surface contact rather than contact.

Therefore, even when die-casting the cylinder 1 with soft aluminum to reduce the manufacturing cost, wear and breakage of the contact portion with the piston 2 can be greatly reduced, and thus the rotation of the piston 2 in operation Restraint is ensured that the operation of the door closer can be made stable for a long time can greatly extend the service life.

On the other hand, a rim portion 4b protrudes from the upper side of the pintle 4, and a coil spring 3 is installed between the lower portion of the rim portion 4b and the upper portion of the piston 2 to move the piston 2 downward. The elastic bias is elastically pushed. Accordingly, when the door D is opened, the pintle 4 coupled thereto rotates according to the rotation of the door D while the piston 2 coupled with the pins 4 and the multi-threaded screw 4a is the cylinder 1. The coil spring 3 is elastically compressed while being engaged with the bore 1a of the coil ascending in a state in which rotation is constrained.

According to the second aspect of the present invention, a coil spring is formed by forming a hole in the rim portion 4b and the piston 2 of the pintle 4 to insert the end portions 3a and 3b of the compression spring 3, or the like. Both ends 3a, 3b of (3) are fixed to the pintle 4 and the piston 2, whereby the coil spring 3 is compressed by the rise of the piston 2 and simultaneously with the rotation of the pintle 4 Torsional deformation.

Accordingly, the coil spring 3 simultaneously exhibits a linear restoring force by compression and a rotation restoring force by torsion. Here, the linear restoring force for returning the piston 2 downwards again rotates the pintle 4 in the closing direction through the multi-threaded screw 4a, but the torsion restoring force directly rotates the pintle 4, so that the door (D) The automatic closing of the will be made.

This second feature of the present invention has a very realistic advantage in the actual configuration of the vertical door closer as follows. In other words, in a vertical door closer of a size that can be installed in a general door frame, the stroke in which the piston 2 can move is within a maximum of 8 mm. Thus, in order to automatically close a heavy door by deformation due to a short stroke, a very large spring is used. Elastic force is inevitably required.

Springs that meet these requirements cannot be quite large, but conventional heat treatment methods for changing the physical properties of the springs have been used to make them compact to accommodate in the cylinder 1. However, the physical properties of the spring changed by heat treatment can not only be loosened by repeated deformation, the yield is easily generated according to the spring, and as a result, the service life of the door closer is inevitably short.

However, according to the second feature of the present invention, since the coil spring 3 acts as a torsional spring at the same time, rather than a simple linear spring, it is possible to realize a significantly higher elastic force than when heat-treating compression springs of the same size.

In addition, in the case of using a large compression spring that can provide sufficient restoring force for the automatic closing of the door (D), the elastic restoring force acts as a linear restoring force and is converted into rotational restoring force through the multi-threaded screw 4a. A very large contact pressure is applied between the spline keys 102a and 302a and the key grooves 101 and a 301a which constrain the rotation of 2). On the contrary, according to the first feature of the present invention, not only wear and damage are prevented by the surface contact of a plurality of surfaces, but also a large part of the restoring force generated by the coil spring 3 by the second feature of the present invention is a torsion recovery force. By acting directly to restore the pintle 4 and the rest of the portion is converted to rotational restoring force through the multi-threaded screw (4a), the load on the contact portion can be greatly reduced.

This makes it possible to construct the cylinder (1) with quick and inexpensive aluminum die casting, and to construct a door closer with excellent characteristics that is compact, lightweight and ensures smooth operation for a long time by general springs on the market without special heat treatment. It will be possible.

On the other hand, such a configuration has a tendency to push the door downward when closing because the restoring force of the coil spring (3) acts downward as in the above-described application of the applicant, the automatic closing of the door by the friction between the operating parts is obstructed If you do not hear the door will be pressed downwards. At this time, the lower side of the door is supported by the hinge (H) as shown in Fig. 2 (A), so that the door is not jammed, thereby preventing the automatic closing of the door.

This up and down operation provides the opposite operation to the conventional configuration. This does not affect the hydraulic damping even when the working fluid is reduced. That is, even if bubbles are generated due to the reduction of the working fluid therein due to repeated expansion and contraction due to the temperature change of the cylinder 1, the bubbles are located above the cylinder 1.

However, in the present design, since the piston 2 moves downward when the piston 2 is restored, the piston 2 moves in the working fluid, so that a proper damping action is achieved regardless of the generation of bubbles, thereby ensuring flexible and complete automatic closing of the door.

As such, according to the present invention, there is an effect that a highly reliable vertical door closer can be provided for a long time to automatically close a door.

Claims (4)

A cylinder connected to one of the doors or door frames, a pintle housed in the cylinder and extending outward and connected to the other one of the doors or door frames, and coupled to the pintle and the multi-threaded screw according to the rotational operation of the door. In the vertical door closer having a lifting piston, A vertical door closer, characterized in that the outer surface of the piston (2) and the bore (1a) of the cylinder (1) in which the piston (2) is accommodated and raised have a polygonal cross section corresponding to each other. The method of claim 1, The vertical door closer, characterized in that the polygonal cross-section of the piston (2) and the bore (1a) is composed of an isosceles octagon of the rectangular cross-section chamfered four corners. A cylinder connected to any one of a door or a door frame, a pintle housed inside the cylinder and extending outward and connected to the other one of the door or the door frame, and coupled to the pintle and a multi-threaded screw according to a rotational motion of the door. A vertical door closer comprising a lifting piston and a coil spring for elastically biasing the piston, By coupling and fixing one end of the coil spring 3 to the pintle 4 and the other end to the piston 2, the coil spring 3 has a linear restoring force and a torsion restoring force at the time of lifting the piston 2. Vertical door closers, characterized in that to provide. The method of claim 3, The rim portion 4b is extended to the pintle 4 to couple both ends 3a and 3b of the coil spring 3 to the rim portion 4b of the pintle 4 and the piston 2. Vertical door closer.