KR102489126B1 - Chain Casing for Automatic Window Open and Close Device comprising the Smoke Ventilation Window - Google Patents

Abstract

The present invention guides and accommodates the chain of an automatic opening and closing device having a main body coupled with a chain that can open and close a window including a smoke window and a housing for accommodating the main body, and provides rotational force to allow the chain to enter and exit the main body. A plurality of chain guide parts provided along the length direction to be able to guide the chain in the longitudinal direction of the casing, close to the sprocket providing a chain bend, which communicates with the chain guide part and guides the chain to be bendable by 180 degrees. A chain casing having a guide, comprising: a front casing, one side of which includes one end of the chain casing and includes a region to which the sprocket is coupled and the chain guide part; a rear casing including the other end of the chain casing on one side in the longitudinal direction and having the chain guide portion formed on the other side to communicate with the chain guide portion of the front casing; and front and rear coupling means for coupling the separated front casing and the rear casing so that each of the chain guide parts of the front casing and the rear casing can communicate with each other.
Therefore, according to the present invention, even if the window opening distance increases as the size of the window increases, the length of the mold for the chain casing accommodating the chain does not increase proportionally, and the capacity of the press producing the chain casing can be reduced. and can increase production per unit time.

Description

Chain Casing for Automatic Window Open and Close Device comprising the Smoke Ventilation Window}

The present invention relates to a chain casing for an automatic window opening/closing device including a smoke window, and more particularly, in an automatic window opening/closing device, the length of a chain coming in and out of the chain casing to open and close a window including a smoke window is the size of the smoke window, etc. As the length of the chain casing accommodating the chain of these various lengths also varies according to the size of the chain, the automatic window opening and closing device including the exhaust window with improved structure to manufacture the chain casing while minimizing the economic cost It's about the chain casing.

Buildings having various structures are provided with doors or windows for the purpose of ventilation or access, and in many cases, these doors or windows are controlled to be automatically opened and closed under certain conditions. Among the various types of doors used for this purpose, a smoke exhaust window as described later will be described as an example.

In other words, modern buildings have various shapes, and in particular, the floor area ratio is increased by increasing the floor height on a narrow site, and the windows are large to secure a view. In such a high-rise building, on the one hand, there are advantages in terms of habitability, usability, commerciality, etc., but on the other hand, there is a disadvantage that human life or property damage increases in an emergency such as fire. Considering these points, interest in fire-fighting equipment related to fire is growing.

According to recent statistics, more than 40,000 fires occurred nationwide from 2009 to 2017, and in 2017 alone, 2197 people were killed and property damage was over 500 billion won. More than 60% of these occurred in houses and buildings.

In recent years, when a fire occurs due to building materials with a high calorific value and building materials according to the strengthening of fire resistance performance of buildings, gas or smoke tends to increase inside the building. According to statistics, the number one cause of fire deaths is suffocation due to smoke, and 60 to 70% of fire deaths are caused by suffocation or poisoning caused by toxic smoke. Therefore, it is very important to control smoke generated in the event of a building fire so that occupants can safely evacuate.

To this end, the building and firefighting related laws have regulations on smoke exhaust systems and smoke control systems for the rapid discharge of smoke generated in the event of a fire. Among them, in relation to the Building Act, Article 14 of the ‘Rules on Facility Standards for Buildings, etc.’ stipulates the contents of building smoke exhaust systems. Smoke exhaust facilities can be divided into natural exhaust and mechanical exhaust, and the basics of natural exhaust are exhaust windows and exhaust pipes. Exhaust windows are facilities that detect smoke in the event of a fire and open the windows to discharge smoke and toxic gases. On the other hand, the ‘Act on Fire Prevention, Installation and Maintenance of Fire-Fighting Facilities, and Safety Management (abbreviated as the Fire-Fighting Facility Act)’ stipulates fire-fighting facilities that operate mechanically by fans and pumps.

Smoke windows are installed in buildings so that they can be automatically or manually controlled to open to the outside so that the smoke of the corresponding floor can be immediately discharged in the event of a building fire. The exhaust pipe, which is an outlet for discharging smoke or heat flow when the smoke control system is in operation, is connected to the smoke control airway, and in the event of a fire, it performs a smoke exhaust function in various forms according to the smoke control method. Exhaust window is a kind of 'natural exhaust smoke machine' that ventilates with natural force due to the difference in density. That is, when a fire occurs inside the building, the smoke exhaust window is quickly operated to discharge toxic gas inside to the outside, thereby minimizing human casualties and making it easy to secure time for evacuation.

When installing a smoke exhaust window in a building, considering the purpose of use, scale, and range of users of the building, the opening and closing method, window size, opening and closing angle, installation conditions, safety of construction, convenience of operation and operation, maintenance and repair Design, construction, and management should be performed in consideration of defect management and external aesthetics of the building.

As described above, these smoke windows play a very important function in case of fire, so the performance test for them is rigorous. These performance tests include a repeated operation test to confirm reliability and durability according to repeated operation of the product, a load opening test to confirm the ability to open and keep open when a load is applied to the smoke window due to wind or snow, and low temperature in cold weather Low-temperature test to check whether it operates properly under the environmental conditions of the wind, high-temperature test to check whether the closed state is maintained when suction pressure is applied to the exhaust window or whether it operates normally after such force is applied, and high-temperature environmental conditions In the test body, there is a heat resistance test to check whether the specimen is open and the ability to keep it open.

In addition, the opening method of the smoke exhaust window includes a sliding method, a tilt method, a project method, a casement method, a pivot method, and the like.

A chain is provided in the automatic opening and closing device for the smoke window, and the chain comes out of the automatic opening and closing device due to a fire or the like when the chain is received to open the smoke window. That is, the automatic opening/closing device must have a chain casing accommodating the required chain at a distance equal to the opening of the smoke window.

The material of the cane casing is made of a synthetic resin material, and the chain casing is manufactured by being extruded in the shape of a mold.

The windows of buildings are gradually becoming larger, and in order to open such large windows, the length of the chain must be gradually increased, and the size of the chain casing must be increased as much as the length of the chain is increased.

As the length of the chain casing increases, the size of the mold increases, and the capacity of the press that extrudes the mold must increase as the mold grows, and at the same time, the press-in time of the extruded material increases and the cooling time of the press-in material increases, resulting in an overall increase in production per unit time. decrease, and the economy weakens.

Therefore, even if the length of the chain casing increases, it is preferable that the size of the mold for producing it does not increase.

[references]

Registered Patent Publication No. 10-1416074 (Announced on July 7, 2014)

Registered Patent Publication No. 10-1426645 (2014.08.06. Notice)

An object of the present invention is to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window in which the length of a mold of a chain casing for accommodating a chain does not increase proportionally even if the window opening distance increases as the size of the window increases. is to do

In addition, another object of the present invention is to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window capable of reducing the capacity of a press for producing a chain casing and increasing production per unit time.

In addition, another object of the present invention is to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window, in which production of the chain casing is simple and convenient, and economical efficiency can be improved.

In addition, another object of the present invention is to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window capable of achieving a chain casing of various length ranges with a minimized chain casing mold.

An object of the present invention is to guide and accommodate the chain of an automatic window opening and closing device having a main body coupled with a chain that can open and close a window including a smoke window and a housing for accommodating the main body, and to enter and exit the main body. A plurality of chain guide parts provided along the length direction to be able to guide the chain in the longitudinal direction of the casing close to a sprocket that possibly provides rotational force, and communicate with the chain guide part to guide the chain to be bent by 180 degrees. A chain casing having a chain bending guide, one side of which includes one end of the chain casing and a front casing including a region to which the sprocket is coupled and the chain guide portion; a rear casing including the other end of the chain casing on one side in the longitudinal direction and having the chain guide portion formed on the other side to communicate with the chain guide portion of the front casing; Front and rear coupling means for coupling the front casing and the rear casing so that each of the chain guide parts of the front casing and the rear casing can communicate with each other.

In addition, the front and rear coupling means includes a skirt extending from one end of the front casing or the rear casing toward the other of the front casing or the rear casing; It is preferable to include a skirt pin protruding from the skirt, and a skirt pin hole provided to be engaged with the skirt pin at a position corresponding to the skirt pin of the other one of the front casing or the rear casing.

In addition, it is preferable that the front and rear coupling means further include a gap coupling member provided to be coupled to a partition gap formed between the partition walls of the chain guides.

In addition, the skirt is preferably coupled to the rear casing in a cantilever type so as to be elastically deformable in the process of being coupled to the front casing.

In addition, the chain guide communicates with the sprocket side and is formed in the longitudinal direction of the chain guide, and the first chain bends for guiding the chain moving along the first chain guide in a direction changeable by 180 degrees. A guide; a second chain guide communicating with the first chain bend guide to guide the chain toward the sprocket; , a third chain guide communicated with the second chain bending guide and formed between the first chain guide and the second chain guide.

According to the present invention, there is provided a chain casing for an automatic window opening and closing device including a smoke exhaust window in which the length of a mold of a chain casing accommodating a chain does not increase proportionally even when the window opening distance increases as the size of the window increases. can

In addition, it is possible to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window capable of reducing the capacity of a press for producing a chain casing and increasing production per unit time.

In addition, it is possible to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window, in which production of the chain casing is simple and convenient, and economical efficiency can be improved.

In addition, it is possible to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window capable of achieving a chain casing of various length ranges with a minimized chain casing mold.

1A and 1B are partial perspective views and planar cross-sectional views showing an example in which an automatic opening and closing device according to an embodiment of the present invention is coupled to a smoke window in two stages;
2a and 2b are a plan view and a partial perspective view of an automatic opening and closing device;
3 is a plan view in which a part of the chain casing of the automatic opening and closing device is opened;
4 is a perspective view of a chain casing according to an embodiment of the present invention;
5a to 5c are conceptual diagrams conceptually illustrating a process of manufacturing a chain casing of various lengths according to the prior art;
6a to 6c are conceptual views illustrating a process of manufacturing chain casings of various lengths according to the prior art.

A chain casing (1000, hereinafter referred to as 'chain casing') for an automatic window opening and closing device including a smoke exhaust window according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6C. .

1A and 1B are partial perspective views and plan sectional views illustrating an example in which an automatic opening and closing device according to an embodiment of the present invention is coupled to a smoke window in two stages, and FIGS. 2A and 2B are a plan view and a partial perspective view of the automatic opening and closing device. 3 is a plan view in which a part of a chain casing of an automatic opening and closing device is opened, FIG. 4 is a perspective view of a chain casing according to an embodiment of the present invention, and FIGS. 5A to 5C are chains of various lengths according to the prior art. It is a conceptual diagram conceptually illustrating a process of manufacturing a casing, and FIGS. 6A to 6C are conceptual views illustrating a process of manufacturing a chain casing of various lengths according to the prior art.

Prior to describing the present invention in more detail, the present invention may be subject to various changes and may have various forms, and implementation (or aspect)

Example) will be explained in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numeral, in particular, the same number of tens and ones digits, or the same reference numerals having the same tens digit, ones digit, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings Members indicated by reference numerals may be understood as members conforming to these standards.

In addition, the components in each drawing are expressed in exaggeratedly large (or thick) small (or thin) or simplified expressions in size or thickness in consideration of convenience of understanding, etc., but the scope of protection of the present invention is thereby limited. It shouldn't be.

Terms used in this specification are only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as ~comprising~ or ~consisting of are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

The chain casing 1000 according to the present invention is exemplified as being applied to the automatic opening and closing device 100 for exhaust windows that are opened to discharge indoor smoke in the event of a fire, but automatically closes windows installed in the front room in case of fire. Of course, it can also be applied to the chain casing of the automatic closing device.

As shown in FIGS. 1 to 4, the chain casing 1000 according to the present invention has a chain 114 that can open and close a window 30 coupled to a window frame 10 including a smoke window. It is used in an automatic opening/closing device 100 having a combined main body 110 and a housing 130 accommodating the main body 110, guides and accommodates the chain 114, and moves the chain 114 to the main body ( A plurality of chain guide parts 1320 and 1330 provided along the longitudinal direction to be able to guide the chain 114 in the longitudinal direction of the chain casing 1000 close to the sprocket 113 providing rotational force so as to be able to enter and exit the chain 110 , 1340, 1520, 1530, 1540), and chain bending guides 1370 and 1570 communicating with the chain guide part and guiding the chain 114 to be bendable at 180 degrees.

The automatic opening/closing device 100 is coupled to a driving unit 111 including a motor and a reducer, a power transmission unit 112 including a gear that transmits power of the driving unit 111, and a shaft of the power transmission unit 112. The sprocket 113 that transmits rotational force to the chain 114, the chain attachment 114a coupled to the end of the chain 114 and coupled to the window 30, the drive unit 111, and the power transmission unit 112 are combined a main body 110 including a drive unit casing 115 accommodated therein; As shown in Figures 2a and 2b, the body housing 130 made of an injection-molded material made of a material containing long aluminum that supports the body 110 by sliding coupling; consists of. Each of these configurations can be easily understood by those skilled in the art, including the present inventor, from well-known content and is not related to the main technical idea of the present invention, so detailed descriptions are omitted. The drive unit casing 115 is coupled to the chain casing 1000 by a fastening means including bolts to form the exterior of the main body 110 .

The chain casing 1000 is a front casing 1300, one side of which includes one end of the chain casing 1000 and includes an area to which the sprocket 113 is coupled and the chain guide parts 1320, 1330, and 1340. class; One side in the longitudinal direction includes the other end of the chain casing 1000, and the other side has the chain guide parts 1520, 1530, which can communicate with the chain guide parts 1320, 1330, 1340 of the front casing 1300. 1540) formed with the rear casing 1500; The front casing 1300 and the rear casing 1500 are connected so that the chain guide parts 1320 - 1520, 1330 - 1530, and 1340 - 1540 of the front casing 1300 and the rear casing 1500 can communicate. It is preferable to include; front and rear coupling means (1700) to be coupled.

As described above, the chain casing 1000 is made of a synthetic resin material and is compression molded by using a mold and press having a set pressure.

Although this chain casing 1000 is not divided, as shown in FIG. 4, the part where the chain guides are visible (for example, the lower mold) and the part where the rear surface is visible (for example, the upper mold) are coupled with mutual fastening screws, so that each chain guide part A space is formed and the chain 114 is accommodated and guided into this space.

In the front casing 1300, a sprocket shaft hole 1310 through which a shaft (not shown) of the sprocket 113 can pass, a shaft bearing hole 1360 to which a bearing rotatably supporting the sprocket shaft is coupled, and a chain 114 ) is provided on the left side as shown in FIG.

The front casing 1300 includes a first chain guide 1320 formed in the longitudinal direction of the front casing 1300 or the chain casing 1000 in communication with the chain 114 that passes or will pass through the sprocket 113, and the first chain The second chain guide 1330, which guides the chain 114 in and out in the direction of 180 degrees with the guide 1320, communicates with the second chain guide 1330 to guide the chain 114 to be switchable in the direction of 180 degrees. A second bending chain guide 1370 communicating with the second bending chain guide 1370 and a third chain guide 1340 formed between the first chain guide 1320 and the second chain guide 1330 are provided. there is.

As shown in FIG. 4, the right side of the front casing 1300 is characterized in that the first chain guide 1320 to the third chain guide 1340 are open.

Meanwhile, a skirt pin hole 1380 is formed at a position close to the right end of the front casing 1300 so that a skirt pin 1713 to be described later is engaged with it.

The rear casing 1500 is combined with the front casing 1300 to guide the chain 114 of a set length to move.

In the rear casing 1500, the first chain guide 1520 communicates with the first chain guide 1320 of the front casing 1300, and the chain of the first chain guide 1320 communicates with the first chain guide 1320. A first chain bending guide 1570 for rotatably guiding 114 to the second chain guide 1330 by 180 degrees, and a second chain guide communicating with the second chain guide 1330 of the front casing 1300 ( 1530) and a third chain guide 1540 communicating with the third chain guide 1340 of the front casing 1300.

On the other hand, partition walls 1321, 1331, and 1341 partitioned vertically with respect to the plate surface are provided as means for partitioning each chain guide, and in particular, partition walls 1331 of the second chain guide 1330 and the third chain guide 1340 , 1341), and this interval is the bulkhead gap 1349.

The front and rear coupling means 1700 may be provided in either the front casing 1300 or the rear casing 1500, but in one embodiment it is provided in the rear casing 1500, and the front and rear coupling means 1700 may be provided in various However, in one embodiment, as shown in FIG. 4, it is made of a sheet skirt 1710 and a gap coupling member 1730.

The plate surface skirt 1710 is integrally molded on the plate surface of the rear casing 1500 so as to face the front casing 1300 side. The sheet skirt 1710 may be molded into one piece, and may be molded into one piece as in the embodiment. Such a shape may be deformed within a range in which mutual interference does not occur while the body 110 is slidably coupled to the body housing 130 described above. In addition, the plate skirt 1710 is molded to the rear casing 1500 in a cantilever type, and has a structure in which an external force is applied during the coupling process, and when the external force is removed, it elastically deforms to the plate surface of the front casing 1300 and returns. desirable. Due to the structure of the plate skirt 1710, the plate surface of the plate skirt 1710 and the plate surface of the front casing 1300 can make surface contact with each other.

In addition, a skirt pin 1713 protrudes from the plate surface skirt 1710 to engage with a skirt pin hole 1380 recessed into the plate surface of the front casing 1300.

In addition, a gap coupling member 1730, which can be coupled to the partition gap 1349 corresponding to the position of the partition gap 1349 of the front casing 1300, is coupled (or integrally molded) to the plate surface of the plate surface skirt 1710. It is desirable to be

By this structure, the front casing 1300 and the rear casing 1500 are coupled to each other, so that the coupling force can be stably maintained in the entire longitudinal direction of the chain casing 1000 and in the transverse direction of the longitudinal direction.

With this structure, the chain 114 is formed through the chain entrance 1350 - sprocket 113 - first chain guide 1310 - first chain bending guide 1570 - second chain guide 1330 - second chain bending guide (1370) - Guided into the chain casing 1000 in order of the third chain guide 1340.

The front and rear coupling means 1700 may have a structure in which the front casing 1300 and the rear casing 1500 are coupled to each other in a plate shape surrounding the outer plate surfaces of the front casing 1300 and the rear casing 1500 in a 'c' shape. will be.

Advantages of the chain casing 1000 according to the present invention compared to the prior art will be described with reference to FIGS. 5 and 6.

First, when the width of the smoke exhaust window opened and closed by the automatic opening and closing device 100 is 1000 mm, the length of the chain 114 should be about 1570 mm as shown in FIG. The length of the chain casing 1000 should be about 605 mm.

Also, when the length of the chain is 1150 mm, the length of the chain casing 1000 should be about 515 mm, and when the length of the chain is 750 mm, the length of the chain casing 1000 is preferably about 380 mm.

For convenience of description, the total length of the chain casing 1000 is 605 mm (see 'L3' in FIGS. 5 and 6), 515 mm (see 'L2' in FIGS. 5 and 6), and 380 mm (see 'L1' in FIGS. 5 and 6). ' reference).

In this case, in the case of the prior art as shown in FIG. 5, in order to manufacture the chain casing 1000, each mold is manufactured or a mold of the longest chain casing 1000 is manufactured, and the part where the middle chain 114 enters. The chain casing 1000 is manufactured by creating a mold structure (such a structure is cheaper than making three molds, so it is practically widely used) so that only the chain can be additionally attached and detached.

That is, in the prior art, a mold corresponding to each size of the chain casing 1000 is made, or as described later, the longest mold is used as a standard (see length 'L3' in FIG. 5C), and the chain casing 1000 is formed. In the case of adjusting the length of only the part that is used (see 'L1' needle in FIG. 5A and 'L2' in FIG. 5B), since the mold is the mold of the largest chain casing 1000, a press having at least the same length ('100 ton press' in FIG. 5) reference) should be used.

According to this structure, as a large press is used, the cost may increase and the number of chain casings 1000 molded and manufactured per hour may decrease compared to the case of using a small press.

On the other hand, as shown in FIG. 6, the mold for molding the chain casing 1000 according to the present invention has a front casing 1300 having an 'Lfront' smaller than the overall length 'L3' of FIG. 5C of the prior art. Two molds, a mold for molding and a mold for molding the rear casing 1500, are used.

That is, in terms of the number of molds, the present invention may be disadvantageous than the prior art. However, as will be described later, the range in which the chain casing 1000 can be manufactured is very diverse, the size of the press used is small, and considering the overall cost in consideration of the number of chain casings produced per unit time, it is not at all disadvantageous. can know

And, as described above, as shown in FIG. 6, a mold for producing the rear casing 1500 having a length 'Lrear' is also required.

Using the front casing 1300 having the 'Lfront' length and the rear casing 1500 having the 'Lrear' length produced by these two molds, as shown in FIG. 6, 'L1', 'L2' and The chain casing 1000 of 'L3' can be manufactured.

That is, as shown in FIG. 6, a press for forming the front casing 1300 uses a 50 ton press having a smaller capacity than the prior art of FIG. 5, and a 20 ton press for forming the rear casing 1500 is used. Overall, less than the capacity of prior art presses can be taken.

That is, in order to manufacture the chain casing 1000 having a length of 'L3' in the prior art, in the present invention, the length 'Lfront' of the front casing 1300 is 450 mm, and the length 'Lrear' of the rear casing 1500 is 230 mm. can be assumed.

The operation process or assembly process of the chain casing 1000 having such a structure will be described with reference to FIG. 6 as follows.

First, the front casing 1300 having the length of FIG. 6c (see 'Lfront' in FIG. 6c) is molded, and the rear casing 1500 having the length of FIG. 6c (see 'Lrear' in FIG. 6c) is molded.

Then, in order to combine the front casing 1300 and the rear casing 1500 to manufacture the longest chain casing 1000, the worker applies an external force to the plate skirt 1710 of the rear casing 1500 or uses a jig By elastically deforming the plate skirt 1710, one of the front casing 1300 and the rear casing 1500 is replaced with the other so that the skirt pin 1713 protruding from the plate skirt 1710 is engaged with the skirt pin hole 1380. When pressing toward or applying an external force, the skirt pin 1713 snaps into the skirt pin hole 1380, and the front casing 1300 and the rear casing 1500 are mutually coupled. At this moment, the gap coupling member 1730 is coupled between the partition gap 1349, so that the front casing 1300 and the rear casing 1500 can maintain a more firmly coupled state.

If the overall length is short as shown in FIGS. 6A and 6B , if necessary, the front casing 1300 may be cut to a required length and then combined with the rear casing 1500 .

Therefore, according to the present invention, a chain casing for an automatic window opening and closing device including a smoke exhaust window in which the length of the mold of the chain casing for accommodating the chain does not increase proportionally even if the distance at which the window is opened increases as the size of the window increases. can provide

In addition, it is possible to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window capable of reducing the capacity of a press for producing a chain casing and increasing production per unit time.

In addition, it is possible to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window, in which production of the chain casing is simple and convenient, and economical efficiency can be improved.

In addition, it is possible to provide a chain casing for an automatic window opening and closing device including a smoke exhaust window capable of achieving a chain casing of various length ranges with a minimized chain casing mold.

Here, although an embodiment of the present invention has been illustrated and described, those skilled in the art to which the present invention pertains can appreciate that this embodiment can be modified without departing from the principles or spirit of the present invention. will be. The scope of the invention will be defined by the appended claims and their equivalents.

1000: chain casing
1300: front casing 1310: sprocket shaft hole
1320: first chain guide 1330: second chain guide
1340: 3rd chain guide 1350: chain entrance
1360: shaft bearing hole 1370: second chain bending guide
1380: skirt pinhole
1321, 1331, 1341: chain bulkhead 1349: bulkhead gap
1500: rear casing 1520: first chain guide
1530: second chain guide 1540: third chain guide
1570: 1st chain bending guide
1700: Front and rear coupling means 1710: Board skirt
1713: skirt pin 1730: gap coupling member
100: automatic opening and closing device 110: main body
111: driving unit 112: power transmission unit
113: sprocket 114: chain
114a: chain attachment 115: driving unit casing
130: housing

Claims (5)

A sprocket for guiding and accommodating the chain of an automatic opening/closing device having a main body coupled with a chain for opening and closing a window including a smoke window and a housing for accommodating the main body, and providing rotational force to allow the chain to enter and exit the main body. A chain casing having a plurality of chain guide parts provided along the length direction to be able to guide the chain in the longitudinal direction of the casing, and a chain bending guide communicating with the chain guide part and guiding the chain to be bendable at 180 degrees. in
a front casing, one side of which includes one end of the chain casing and includes an area to which the sprocket is coupled and the chain guide part;
a rear casing including the other end of the chain casing on one side in the longitudinal direction and having the chain guide portion formed on the other side to communicate with the chain guide portion of the front casing;
Front and rear coupling means for coupling the separated front casing and the rear casing so that each of the chain guide parts of the front casing and the rear casing can communicate with each other,
The front and rear coupling means,
a skirt extending from one end of either the front casing or the rear casing toward the other one of the front casing or the rear casing;
Including; a skirt pin protruding from the skirt,
and a skirt pin hole provided to be engaged with the skirt pin at a position corresponding to the skirt pin of the other one of the front casing and the rear casing. delete According to claim 1,
The chain casing according to claim 1 , wherein the front and rear coupling means further include a gap coupling member provided to be coupled to a partition gap formed between the bulkheads of the chain guides. According to claim 1,
The chain casing according to claim 1 , wherein the skirt is coupled to the rear casing in a cantilever shape so as to be elastically deformable in the process of being coupled to the front casing. According to claim 1,
The chain guide part,
A first chain guide communicating with the sprocket side and formed in the longitudinal direction of the chain guide part;
A first chain bending guide for guiding the chain moving along the first chain guide in a 180-degree direction changeable manner;
a second chain guide communicating with the first chain bending guide and guiding the chain toward the sprocket;
A second chain bending guide for guiding the chain moving along the second chain guide in a direction changeable by 180 degrees;
and a third chain guide communicated with the second chain bending guide and formed between the first chain guide and the second chain guide.

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