KR102779150B1 - Compen belt manufacturing method - Google Patents

Abstract

A method for manufacturing a compenbelt which can resolve the shortcomings of a balance chain used in an elevator, does not twist, and when a transparent material is used as a compenbelt body composition, it is easy to check whether or not internal steel wires are damaged, and can manufacture various types of compenbelts by replacing some molds is disclosed. The compenbelt manufacturing method comprises a steel wire supply process of supplying steel wires, a heating process of heating the supplied steel wires; and an extrusion molding process of supplying a molten compenbelt body composition to the extrusion head while passing the heated steel wire through the extrusion head so that the compenbelt body composition surrounds the steel wire to form a belt-shaped compenbelt.

Description

Compen belt manufacturing method {Compen belt manufacturing method}

The present invention relates to a method for manufacturing a compen belt, and more particularly, to a method for manufacturing a compen belt using steel wire.

In general, an elevator is a device that transports passengers or cargo by raising and lowering an elevator cage in which passengers are boarded or cargo is loaded, and is raised and lowered by a wire rope pulled by a driving machine.

In particular, in elevators installed in high-rise buildings, a balance chain is installed between the bottom of the cage and the bottom of the counter weight to prevent shaking and maintain the correct posture when the cage is raised and lowered. The balance chain compensates for the weight fluctuation of the upper wire rope that changes according to the raising and lowering of the cage and counter weight.

When the elevator starts or stops, a flow occurs in the balance chain, and this flow is transmitted to the cage, causing the cage to shake or the balance chain to hit other parts below, causing noise and impact.

Additionally, the fluidity of the balance chain causes the balance chain to become tangled, which causes the balance chain to not perform its function.

The inventor of the present invention has found that the above-mentioned problems of the conventional balance chain can be solved by using a synthetic resin material that surrounds the wire and is made in the shape of a belt. Accordingly, the inventor has examined conventional technologies that can replace the balance chain. As a result, a flat belt including a belt body formed by inserting a plurality of steel cords at intervals inside a PVC resin and an ultraviolet ray blocking layer coated on the surface of the belt body has been invented for use in traction of an elevator cage, and this is disclosed in the patent publication of Publication No. 10-2020-0044359 (Title of the invention: Flat belt for elevator, Inventor: Yongjin Park).

However, it was found that the invention by Park Yong-jin, as mentioned above, was developed for use in traction of elevator cages, and is not suitable as a substitute for a balance chain due to the use of a large number of steel cords and the presence of an ultraviolet ray blocking layer.

The purpose of the present invention is to provide a method for manufacturing a compensation belt (hereinafter, abbreviated as “compen belt”) capable of solving the problems of noise and shock generated by a balance chain.

Another object of the present invention is to provide a method for manufacturing a compen belt that can provide a compen belt that can be used instead of a balance chain without causing twisting even when flowing.

Another object of the present invention is to provide a method for manufacturing a comfort belt, which can provide a comfort belt in which damage to the inner steel wire can be easily determined.

Another object of the present invention is to provide a method for manufacturing a compenbelt that enables the manufacture of a compenbelt in which the portion to be cut and removed can be easily identified when connecting a cage and a counter waiter.

Another object of the present invention is to provide a method for manufacturing a compen belt which enables manufacturing various types of compen belts.

The method for manufacturing a compenbelt according to the present invention comprises a steel wire supply process for supplying steel wire; a heating process for heating the supplied steel wire; and an extrusion process for passing the heated steel wire through an extrusion head while supplying a molten compenbelt body composition to the extrusion head so that the compenbelt body composition surrounds the steel wire to form a band-shaped compenbelt.

It is preferable that the above extrusion molding process includes a process of forming a plurality of protrusions at intervals in the width direction of the compen belt on one surface of the compen belt.

It is preferable to include a cooling process for cooling the compression belt that has exited the extrusion head by passing it through a cooling section.

It is preferable that the above cooling process include passing the comfort belt through a water channel containing cooling water.

It is preferable to include a pulling process for pulling the above-mentioned compensation belt and pulling the above-mentioned compensation belt from the above-mentioned cooling unit; and a winding process for winding the pulled-out compensation belt onto a winding roll.

The extrusion molding process preferably extrudes the comfort belt using an extrusion head including a first mold having a steel wire passage hole through which the steel wire can pass, first slits formed with a gap above and below the steel wire passage hole to allow the molten comfort belt main body composition to pass through, and a pair of triangular grooves formed on one surface thereof so that the comfort belt main body composition supplied spreads widely and is supplied to the first slits; a second mold having a first passage hole through which the steel wire can pass through a set position and a second slit formed at a position corresponding to the first slit and is closely joined to the first mold; a third mold having a die hole having the same shape as the outer shape of the comfort belt and being closely joined to the second mold to determine the outer shape of the comfort belt; and an openable housing that allows the passage of the steel wire and accommodates and supports the first mold to the third mold therein.

It is preferable that the above extrusion molding process can extrude the above compen belts of different thicknesses or different shapes by replacing the second mold and the third mold.

It is preferable that the above extrusion molding process includes extrusion molding the comfort belt using the extrusion head having an auxiliary type installed in front of the first mold and having a second hole formed therein to enable the steel wire entering the first mold to enter a set position without shaking.

According to the present invention, it is possible to provide a compen belt that can be used as a substitute for a balance chain by overcoming the disadvantages of a balance chain used in an elevator.

The compenbelt manufactured according to the method of the present invention is formed in a belt shape and has protrusions arranged in a plurality of rows, so it does not twist.

The comfort belt manufactured according to the method of the present invention can easily check whether the internal steel wire is damaged by using a transparent material as the comfort belt body composition, and thus can easily determine the time of replacement.

According to the present invention, various types of compen belts can be manufactured by replacing molds No. 2 and No. 3.

Figure 1 is a side view of the manufacturing equipment for explaining the manufacturing process of the compen belt manufacturing method according to the present invention.
Figure 2 is a process diagram showing the manufacturing process of the compen belt manufacturing method according to the present invention.
Figure 3 is a drawing for explaining the process of supplying the molten compenbelt body composition to the extrusion head of Figure 1.
Figure 4 is a front view of mold No. 1 for making a compen belt according to the present invention, viewed from the wire feeder side.
Figure 5 is a back photograph of mold No. 1 shown in Figure 4.
Figure 6 is a front view photograph of mold No. 2 for making a comfort belt according to the present invention.
Figure 7 is a back photograph of mold No. 2 shown in Figure 6.
Figure 8 is a front view photograph of mold No. 3 for making a comfort belt according to the present invention.
Fig. 9 is a back photograph of mold No. 3 shown in Fig. 8.
Figure 10 is a front view of a subsidy type for making a comfort belt according to the present invention.
Fig. 11 is a back view of the Fig. 10 subsidy type.
Figure 12 is a rear view photograph of an openable housing for supporting and accommodating molds No. 1 to No. 3 therein.
Figure 13 is a photograph showing an opened state of a housing with molds No. 1 to 3 installed.
Figure 14 is a photo of the back of the housing open showing the auxiliary mold and mold No. 3 installed.
Figures 15 to 18 are cross-sectional views each showing examples of a comfort belt manufactured according to a method for manufacturing a comfort belt according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Referring to FIGS. 1 to 14, the method for manufacturing a compenbelt according to the present invention has a steel wire supply process (S1), a steel wire heating process (S2), and an extrusion molding process (S3). The steel wire supply process (S1) is a process in which a steel wire (SW) wound around a wire reel (112) rotatably mounted on a wire supply device (110) constituting a compenbelt manufacturing facility (100) according to the present invention can be supplied toward an extrusion head (140) of an extruder (130) via a heater (120), and is guided by guide rollers (114, 124) installed on the wire supply device (110) and the heater (120). The number of steel wires (SW) supplied through the wire supply device (110) may increase or decrease depending on the type of compenbelt (200) to be manufactured, as shown in FIGS. 15 to 18. That is, the steel wires (SW) can be supplied to the extrusion head (140) in the required number, such as two, three, four, or five.

The steel wire (SW) supplied to the heater (120) is heated (S2) while passing through the heater (120). The purpose of heating the steel wire (SW) is to ensure that the molten compenbelt body composition (210) can be well attached, and 180 to 220 degrees (zone temperature) is appropriate.

The heated steel wire (SW) is supplied to the extrusion head (140) of the extruder (130). The molten Compenbelt body composition (210) is also supplied to the extrusion head (140). The extrusion head (140) extrudes the steel wire (SW) so that the molten Compenbelt body composition (210) surrounds the steel wire (SW) while passing the steel wire (SW) to form a band-shaped Compenbelt (200) (S3).

PVC is suitable as the compenbelt body composition (210). In some cases, other plastics having similar properties to PVC may be used as the compenbelt body composition (210). In addition, the compenbelt body composition (210) may be made of a transparent material. When a transparent material is used as the compenbelt body composition (210), the state of the inner steel wire (SW) can be easily visually confirmed over the entire length of the belt.

Referring to FIGS. 1 and 3, a raw material of a compenbelt body composition (210), such as PVC, is supplied to a hopper (132) of an extruder (130), heated and melted by an internal melting device (134), and the molten compenbelt body composition (210) is supplied to an extrusion head (140) through which a steel wire (SW) passes by a rotating screw feeder or the like, thereby enabling extrusion molding of a compenbelt (200).

Referring to FIGS. 12 to 14, the extrusion head (140) is sequentially accommodated and mounted in a mold mounting portion (147b) within a housing (147) that can open and close the first mold (141) to the third mold (145) as shown in FIGS. 4 to 9, and has a configuration that allows the passage of a steel wire (SW).

The first mold (141) to the third mold (145) are accommodated and supported in a mold mounting portion (147b) inside a housing (147). The housing (147) can open and close the mold mounting portion (147b) by rotatably connecting two housing parts through a hinge axis (147a).

The first mold (141) used in the extrusion molding process is arranged at the frontmost position among the first mold (141) to the third mold (145), and may also be referred to as a head mold. The first mold (141) has a steel wire passage hole (141a) through which a steel wire (SW) may pass, a first slit (141b) formed at an interval above and below the steel wire passage hole (141a) to allow the molten Compenbelt main body composition (210) to pass through, and a pair of triangular grooves (141c) formed on one surface to the outside of the first slit (141b) so that the Compenbelt main body composition (210) supplied spreads widely and is supplied to the first slit (141b). The molten comfort belt main body composition (210) is supplied to the apex of a triangular groove (141c) located far from the steel wire passage hole (141a) and supplied toward the steel wire passage hole (141a). In front of the first mold (141), preferably, an auxiliary type (149) as shown in FIGS. 10 and 11 may be mounted on the front outer surface of the housing (147). Fastening holes (141d) are formed around the steel wire passage hole (141a) and the first slit (141b) so as to enable fastening to the housing (147) using fastening means such as bolts.

Following the first mold (141), the second mold (143) shown in FIGS. 6 and 7 is mounted. The second mold (143) has two first through-holes (143a) that allow steel wires (SW) to pass through at set positions, and second slits (143b) formed at positions corresponding to the first slits (141b) and is tightly coupled to the first mold (141). The second mold (143) may be referred to as a nipple mold. When the second mold (143) shown in FIGS. 6 and 7 is used, a compenbelt (200) having two steel wires (SW) as shown in FIG. 15 can be manufactured. When the number of steel wires (SW) is to be increased, a second mold (143) with increased first through-holes (143a) is required.

Following the second mold (143), a third mold (145) as shown in FIGS. 8 and 9 is mounted. The third mold (145) may also be called a die mold. The third mold (145) has a die hole (145a) having the same shape as the outer shape of the compen belt (200). The third mold (145) is tightly coupled to the second mold (143) and serves to determine the final outer shape of the compen belt (200) to be extruded. The lower side of the die hole (145a) is formed in a straight line shape, and the upper side is formed to have a protruding groove (145b) that is convex upward to form a protrusion (212) on the compen belt (200).

By performing an extrusion molding process using this third mold (145), a comfort belt (200) can be produced in which a plurality of protrusions (212) are formed at intervals in the width direction of the comfort belt (200) on one surface.

In addition, the third mold (145) has a reduction groove (145c) formed on the inside of the die hole (145a) such that the facing surface gradually narrows from the front to the rear, and a flange (145d) is formed around the reduction groove (145c) to enable stable installation inside the housing (147).

The second mold (143) and the third mold (145) as described above can be easily replaced by opening the housing (147). By replacing the second mold (143) and the third mold (145), it is possible to extrude and mold compen belts (200) of different thicknesses or shapes as shown in FIGS. 15 to 18.

Preferably, the auxiliary type (149) shown in FIGS. 10 and 11 may be mounted on the outer surface of the housing (147) in front of the first mold (141). In some cases, the auxiliary type (149) may be mounted on the inner surface of the housing (147). This auxiliary type (149) is installed in front of the first mold (141) so that the steel wire (SW) entering the first mold (141) can enter accurately into a set position without shaking, and four second holes (149a) are formed. The auxiliary type (149) of this embodiment can be used to make a compen belt (200) having two or four steel wires (SW). Fastening holes (149b) for coupling to the housing (147) are formed around the second holes (149a).

Referring again to FIGS. 1 and 2, the extruded compression belt (200) from the extrusion head (140) is supplied to the cooling unit (160) and undergoes a cooling process (S4). Preferably, the cooling process (S4) is performed by submerging the molded compression belt (200) into a water channel containing cooling water and passing it through.

Preferably, a pulling process (S5) is performed to pull the molded comfort belt (200) from the cooling unit (160) by pulling the comfort belt (200) through a puller (170) installed at the back of the cooling unit (160).

The compen belt (200) exiting the withdrawal device (170) goes through a winding process (S6) in which it is wound onto a winding roll (190) through a winding device (180).

The winding machine (180) uses a motor (182) to rotate two rollers (184) equipped with a winding roll (190) in the same direction so that the winding roll (190) rotates, thereby winding the compen belt (200) around the winding roll (190).

When winding for one winding roll (190) is completed, the cutter (175) operates to cut the compen belt (200) (S7).

The cross-sectional shape of the comfort belt (200) manufactured through the above process is illustrated in Fig. 15.

Referring to FIG. 15, a compen belt (200) manufactured according to a compen belt manufacturing method according to the present invention has a configuration in which a compen belt body composition (210) surrounds a steel wire (SW) and is formed in a band or belt shape overall, and protrusions (212) are formed at intervals in the width direction on one surface. The protrusions (212) formed in a plurality of rows serve to increase the tensile strength of the compen belt (200) and also serve to prevent the compen belt (200) from twisting.

When the comfort belt body composition (210) is formed using a transparent material, it is installed instead of the balance chain of the elevator, and the condition (SW) of the internal steel wire can be checked with the naked eye at any time during use, making maintenance easy and notifying the replacement time.

In addition, since the steel wire (SW) functions as a cutting line indicator when connecting the compenbelt (200) according to the present invention to the cage bottom and the counter waiter bottom, the position where the compenbelt body composition (210) at the end of the compenbelt (200) should be cut can be easily confirmed.

In the case of replacing the second mold (143) and the third mold (145) described above, and sometimes the auxiliary mold (149), it is of course possible to produce a compen belt (200) different from that shown in Fig. 15, as shown in Figs. 16 to 18, and a compen belt having different dimensions from that shown in Figs. 15 to 18.

For example, the overall thickness of the comfort belt (200) can be made to various thicknesses such as 6.8 mm, 8.8 mm, 12.0 mm, 13.3 mm, 18.2 mm, 23.2 mm, 23.6 mm, 26.6 mm, and 30.6 mm, and the height of the protrusion (212) can also be 1.5 mm, 2.0 mm, and 3.0 mm.

Additionally, steel wires (SW) can be used to make a compenbelt (200) with 2, 3, 4, or 5 wires as needed.

The present invention is likely to be used to make a compenbelt suitable for use in an elevator. The present invention is likely to be used to make a compenbelt including steel wires. The compenbelt manufactured by the present invention can also be used for other purposes besides elevators.

100: Compenbelt manufacturing equipment 110: Wire feeder
112: Wire reel 114, 124: Guide roller
120: Heater 130: Extruder
132: Hopper 134: Melting device
140: Extrusion head 141: First mold
141a: Steel wire passage hole 141b: First slit
141c: Triangular groove 141d: Fastening hole
143: Second mold 143a: First hole
143b: 2nd slit 145: 3rd mold
145a: Dice hole 145b: Protruding groove
145c: Reduction groove 145d: Flange
147: Housing 147a: Hinge shaft
147b: Mold mounting part 149: Subsidy type
149a: 2nd hole 149b: Fastening hole
160: Cooling unit 170: Extractor
175: Cutter 180: Winder
182: Motor 184: Roller
190: Winding Roll 200: Compen Belt
210: Compressor belt body composition 212: Protrusion
SW: Steel Wire

Claims (8)

Steel wire supply process that supplies steel wire;
A heating process for heating the supplied steel wire; and
It includes an extrusion molding process of forming a band-shaped compenbelt by supplying a molten compenbelt body composition to the extrusion head while passing the heated steel wire through the extrusion head so that the compenbelt body composition surrounds the steel wire.
The above extrusion molding process is,
A first mold having a steel wire passage hole through which the steel wire can pass, a first slit formed with a space above and below the steel wire passage hole so as to allow the molten Compenbelt body composition to pass through, and a pair of triangular grooves formed on one surface thereof so that the Compenbelt body composition supplied spreads widely and is supplied to the first slits, respectively;
A second mold having a first hole that allows the steel wire to pass through a set location and a second slit formed at a location corresponding to the first slit, and being tightly joined to the first mold;
A third mold having a die hole of the same shape as the outer shape of the above-mentioned comfort belt and being closely connected to the above-mentioned second mold to determine the outer shape of the above-mentioned comfort belt; and
A method for manufacturing a comfort belt, characterized in that it comprises extruding the comfort belt using an extrusion head including an openable housing that allows passage of the steel wire and accommodates and supports the first mold to the third mold therein. A method for manufacturing a compen belt, characterized in that in claim 1, the extrusion molding process includes a process of forming a plurality of protrusions at intervals in the width direction of the compen belt on one surface of the compen belt. A method for manufacturing a comfort belt, characterized in that in claim 1, the method comprises a cooling process of cooling the comfort belt that has exited the extrusion head by passing it through a cooling unit. A method for manufacturing a comfort belt, characterized in that in the third paragraph, the cooling process includes passing the comfort belt by submerging it in a water channel containing cooling water. In the third paragraph, a process of pulling the comfort belt to pull the comfort belt out from the cooling unit; and
A method for manufacturing a compen belt, characterized in that it includes a winding process of winding the compen belt that is drawn onto a winding roll. delete A method for manufacturing a compen belt, characterized in that in the first paragraph, the extrusion molding process includes extrusion molding of a compen belt having a different thickness or shape by replacing the second mold and the third mold. A method for manufacturing a comfort belt, characterized in that in claim 1 or claim 7, the extrusion molding process comprises extrusion molding the comfort belt using the extrusion head having an auxiliary type installed in front of the first mold and having a second through hole formed therein to enable the steel wire entering the first mold to enter a set position without shaking.

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