Mold for manufacturing handrail

Abstract

The present invention relates to a mold for manufacturing a handrail, into which a synthetic resin is continuously extruded such that a canvas, a metal cable, and the synthetic resin are integrated to form a handrail. During the process of forming a handrail, joint grooves are formed and a material exhibiting a visually noticeable color is injected into the joint grooves to form an indicator unit. The handrail thus manufactured allows a user to confirm, by checking the indicator unit with the naked eye when the handrail moves, that the escalator is in operation and thus prevents safety-related accidents.

Description

Handrail manufacturing mold

[0001] The present invention relates to a handrail manufacturing mold for manufacturing a handrail having an indicator formed thereon during the handrail manufacturing process, so that a user can easily visually check whether an escalator is in operation.

[0002] In general, escalators are installed and operated in public buildings and department stores with a lot of floating population to maximize the transport capacity of floating population between floors. In such escalators and moving walkways, it is essential to install endless handrails so that users can hold on to them with their hands and move while maintaining stability.

[0003] Meanwhile, since reverse escalator accidents in places with a lot of foot traffic, such as subway stations, can lead to major accidents, the need for safety accident prevention measures such as reverse escalator prevention devices or reverse escalator response systems is emerging.

[0004] The present invention was devised to solve this problem, and provides a handrail manufacturing mold for manufacturing a handrail in which a groove is formed in the process of forming a handrail by continuously extruding synthetic resin to integrate canvas, metal cable, and synthetic resin, and a visible color material is injected into the groove to form an indicator, thereby allowing a user to easily visually check whether an escalator is in operation.

[0005] The present invention relates to a handrail manufacturing mold, which has a long length, a canvas provided on the bottom surface, and a metal cable embedded in the center, and which comprises a horizontal portion, a round portion formed to extend from both ends of the horizontal portion and to be rounded inwardly downward, and an end portion formed to extend inwardly from the ends of the round portion, the manufacturing mold for manufacturing a handrail, comprising: a first mold having a canvas hole through which the canvas is passed to maintain a specific shape and to be transported; a metal cable hole formed on the upper side of the canvas hole and to guide the movement of the metal cable through which the metal cable is passed; a second mold having a first body hole formed therein so that a first body formed integrally with the canvas and the metal cable passing through the first mold is formed; a third mold having a second body hole formed therein so that a second body formed integrally with the first body passing through the second mold is formed; and a third mold having a second body hole formed therein so that a second body formed integrally with the horizontal portion, the round portion, and the end portion is formed; and a mold installed at the rear end of the third mold, It is characterized by including a scraper that is arranged to be able to be raised and lowered so that it contacts the upper surface of the second body as it is lowered so that a groove is selectively formed on the upper surface of the second body, and a fourth mold that is installed at the rear end of the third mold and forms a third body hole having the same shape as the second body hole, but has a valve mounted on the gate to inject synthetic resin only into the groove formed by the scraper to form a display portion.

[0006] In addition, a gate is formed on the upper part of the second mold, and a pair of runners connected to the gate are each characterized by being connected to round portions formed at both ends of the handrail.

[0007] In addition, a gate is formed in the upper center of the third mold, and a runner connected to the gate is characterized in that it is connected to an end portion formed at the lower end of both ends of the handrail.

[0008] Therefore, the manufacturing mold of the present invention has a remarkable effect of preventing safety accidents by forming a display portion on the handrail during the handrail manufacturing process, thereby allowing a user to easily visually check whether the escalator is operating when the handrail is operated.

[0009] Figure 1 is a schematic diagram of a handrail formed by a handrail manufacturing mold according to the present invention.

[0010] Figure 2 is a drawing showing a state in which a handrail is manufactured using a handrail manufacturing mold according to the present invention.

[0011] Figure 3 is a diagram showing a state in which a handrail is formed by the first mold of the present invention.

[0012] Figure 4 is a front view of the first mold of the present invention.

[0013] Figure 5 is a diagram showing a state in which a handrail is formed by the second mold of the present invention.

[0014] Figure 6 is a front view of the second mold of the present invention.

[0015] Figure 7 is a diagram showing a state in which a handrail is formed by the third mold of the present invention.

[0016] Figure 8 is a front view of the third mold of the present invention.

[0017] Fig. 9 is a diagram showing a state in which a handrail is formed by the fourth mold of the present invention.

[0018] Figure 10 (a) is an operating diagram in which the scraper is raised and lowered, and (b) is an operating diagram in which the scraper is lowered.

[0019] Fig. 11 is a front view of the fourth mold of the present invention.

[0020] <Explanation of symbols>

[0021] 10: Handrail

[0022] 12: Canvas

[0023] 14: Metal cable

[0024] 16: Body

[0025] 16a: First body

[0026] 16b: Second body

[0027] 18: Display

[0028] 200: Handrail manufacturing mold

[0029] 210: Mold 1

[0030] 212: Canvas Hall

[0031] 214: Metal cable hole

[0032] 220: Second mold

[0033] 222: First body hole

[0034] 230: Third mold

[0035] 232: Second Body Hole

[0036] 240: Mold 4

[0037] 242: Third Body Hole

[0038] E: End

[0039] G:Gate

[0040] H: Horizontal section

[0041] R: Round section

[0042] R1:RUNNER

[0043] S:Scraper

[0044] Hereinafter, the technical idea of ​​the present invention will be described in more detail using the attached drawings.

[0045] The attached drawings are merely examples illustrated to more specifically explain the technical idea of ​​the present invention, and therefore the technical idea of ​​the present invention is not limited to the form of the attached drawings.

[0046] Figure 1 is a schematic diagram of a handrail formed by a handrail manufacturing mold according to the present invention.

[0047] The present invention relates to a manufacturing mold that forms a display portion (18) on a handrail (10) during a handrail manufacturing process, and as the display portion is formed on the handrail, a user can easily visually check whether an escalator is in operation.

[0048] Below, before describing the mold (200) of the present invention, a handrail (10) manufactured by the mold (200) will be briefly described.

[0049] The above handrail (10) includes a canvas (12) that is arranged on the lower surface of the handrail and is in direct contact with a driving unit such as an escalator moving walkway when the handrail is driven in an endless track, a body (16) made of TPU (thermoplastic polyurethane) material that is integrally extruded on the upper surface of the canvas (12), a metal cable (14) built into the body, and a display portion (18) formed on the upper surface of the body.

[0050] As shown in Fig. 1, the handrail (10) has a long length, and a canvas (12) and a plurality of metal cables (14) are provided in a form in which they are built long along the length of the handrail inside the body (16).

[0051] The above handrail includes a horizontal portion (H), a round portion (R) formed to extend from both ends of the horizontal portion and having a rounded shape that is rolled inwardly downward, and an end portion (E) formed to extend inwardly from the end of the round portion.

[0052] The above canvas (12) is placed on the bottom of the handrail and is an element that comes into direct contact with an escalator, moving walk, etc. when the handrail is driven in a circular manner on an endless track, thereby causing friction.

[0053] Next, the metal cable (14) is intended to improve the durability of the handrail. A plurality of metal cables are arranged at a predetermined interval and are embedded in the central portion of the body along the length of the body.

[0054] Next, the body (16) has a long length, and the vertical cross-section of the body is designed to have the cross-sectional shape of a general handrail with both ends bent downward by an extrusion mold.

[0055] In particular, the body (16) includes a first body (16a) formed by a first raw material that is transparent and has relatively high hardness, and a second body (16b) formed by a second raw material that has a specific color and has lower hardness than the first body.

[0056] The above body is formed by a synthetic resin with a thermoplastic polyurethane (TPU) resin as its main component and a mixture of multiple additives. The TPU resin has a soft phase and a hard phase through block copolymerization, and thus, depending on the ratio of the two phases, it is possible to polymerize an elastic body of various hardnesses.

[0057] The first raw material forming the first body (16b) is a transparent, highly tensile, and heat-resistant TPU resin.

[0058] The second raw material forming the second body (16b) is a TPU resin that is black, has low hardness, good elasticity, is scratch-resistant, does not discolor under ultraviolet rays, and is resistant to yellowing.

[0059] In particular, in the present invention, the durability of the handrail is improved by forming a first body having relatively high hardness to wrap around a metal cable (14) that is prone to heat generation and breakage during long-term operation of the handrail.

[0060] In addition, the second body is formed to wrap around the outer surface of the first body, so that the second body is the contact surface that comes into direct contact with the user, thereby improving the tactile sensation.

[0061] In addition, in the present invention, the end portion (E) of the handrail is formed only by the second raw material having good elasticity, so that when the end portion of the handrail expands or contracts during the process of the handrail being driven in an endless track, it operates flexibly, thereby preventing damage to the handrail.

[0062] Likewise, the round part (R) of the handrail has a larger ratio of the second body molded from the second raw material to the first body molded from the first raw material as it goes down, thereby improving the durability of the handrail.

[0063] Meanwhile, a display portion (18) is formed on the upper surface of the second body. The display portion (18) is formed by a third raw material having a different color from the second raw material, so as to be visible, and is formed along the length of the handrail, with a plurality of display portions spaced apart from each other, so that when the handrail is operated, users can visually confirm the operation of the handrail from a distance, thereby having the effect of preventing safety accidents.

[0064] In the present invention, for the sake of clarity of explanation, the first raw material is illustrated as being transparent, the second raw material as being black, and the third raw material as being red; however, this is merely an example, and the colors of the first and second raw materials may be provided in various ways according to the needs of the user.

[0065] Figure 2 is a drawing showing a state in which a handrail is manufactured using a handrail manufacturing mold according to the present invention.

[0066] As shown in Fig. 2, such a handrail is manufactured by inserting canvas and metal cables into the handrail manufacturing mold (200) and then continuously extruding synthetic resin to form a body, canvas, and metal cables into one piece through extrusion molding.

[0067] The handrail manufacturing mold (200) according to the present invention includes a first mold (210) to a fifth mold (250) that are installed in parallel and in series.

[0068] Fig. 3 is a diagram showing a state in which a handrail is formed by the first mold of the present invention, and Fig. 4 is a front view of the first mold of the present invention.

[0069] The above first mold (210) is a mold for guiding the movement of the canvas (12) and the metal cable (14).

[0070] In the above first mold (210), a canvas hole (212) is formed so that the canvas (12) is passed through and transported while maintaining a specific shape, and a metal cable hole (214) is formed on the upper side of the canvas hole and a metal cable (14) is passed through and guides the movement of the metal cable.

[0071] The canvas (12) and metal cable (14) inserted into the first mold have a long length, and the metal cable is arranged to be placed on the upper part of the canvas.

[0072] At this time, the canvas and metal cable are supplied while being wound on a drum and mounted on a support that supports the drum so that the drum can rotate idly, and it is preferable that the drums on which the canvas and metal cable are each wound have different installation heights, etc. so that the canvas and metal cable do not interfere with each other when each drum is unwound.

[0073] Fig. 5 is a diagram showing a state in which a handrail is formed by the second mold of the present invention, and Fig. 6 is a front view of the second mold of the present invention.

[0074] The canvas (12) and metal cable (14) that passed through the first mold (210) are continuously supplied to the second mold (220).

[0075] In the second mold (220), a first body hole (222) formed in a first body shape is formed to form a first body (16a), and the first body hole is provided to include both a canvas hole (212) and a metal cable hole (214) formed in the first mold.

[0076] The first raw material is introduced into the gate (G,gate) of the second mold (220), and the first raw material flows into the first body hole (222) through the runner (R1,runner) so that the first body (16a) is formed integrally with the canvas and the metal cable.

[0077] At this time, the gate (G) is formed at the upper center of the second mold, and a pair of runners (R1) connected to the gate are provided, and are respectively connected to the round portions (R) formed at both ends of the handrail to ensure that the first raw material is smoothly filled into the first body hole (222).

[0078] The first raw material injected into the second mold is a transparent TPU synthetic resin, and as the first body is molded, a portion of the horizontal portion and round portion of the handrail are molded.

[0079] In the present invention, as an example, the first mold and the second mold are prepared separately, but the canvas and the metal cable may be inserted directly into the second mold, and the first mold may be omitted, and this is not limited to the present invention.

[0080] Fig. 7 is a diagram showing a state in which a handrail is formed by the third mold of the present invention, and Fig. 8 is a front view of the third mold of the present invention.

[0081] The first body (16a) that has passed through the second mold (220) is continuously supplied to the third mold (230).

[0082] In order to form a second body (16b), a second body hole (232) having a shape that includes both the shapes of the first body (16a) and the body (16b) is formed in the third mold (230).

[0083] That is, the second body hole (232) is provided to include the first body hole (222) formed in the second mold (220).

[0084] A second raw material is introduced into the gate (G,gate) of the third mold (230), and the second raw material flows into the second body hole (232) through the runner (R1,runner) to form a second body (16b) integrally extended with the first body (16a).

[0085] At this time, the gate (G) of the third mold is formed in the upper center of the third mold, and a pair of runners (R1) connected to the gate are provided, and are respectively connected to the end portions (E) formed at the lower ends of the handrail so that the second raw material is sufficiently filled in the end portions.

[0086] In particular, the second body formed by the second raw material includes an end portion that requires elasticity in the handrail, and the end portion is formed only by the second body so that the handrail can flexibly expand or contract during the process of driving in an endless track.

[0087]

[0088] Fig. 9 is a diagram showing a state in which a handrail is formed by the fourth mold of the present invention, and Fig. 11 is a front view of the fourth mold of the present invention.

[0089] The body (16) that has passed through the third mold (230) is continuously supplied to the fourth mold (240).

[0090] The body (16) supplied to the fourth mold (240) has a groove (8) formed on the upper surface by a scraper installed between the third mold and the fourth mold, and is then introduced into the fourth mold (240) so that the third raw material is injected into the groove.

[0091] Accordingly, a third body hole (242) identical to the second body hole (232) is formed in the fourth mold (240).

[0092] Figure 10 (a) is an operating diagram in which the scraper is raised and lowered, and (b) is an operating diagram in which the scraper is lowered.

[0093] The above scraper (Scraper, S) is provided so that it can be raised and lowered, so that when the scraper is lowered, the lower part of the scraper comes into contact with the upper surface of the second body to form a groove (8).

[0094] The above-mentioned groove is formed by the rising and falling motion of the scraper, and the groove is selectively formed when the scraper is lowered and comes into contact with the upper surface of the second body, or when the scraper is raised and the contact with the second body is released.

[0095] That is, when the scraper is lowered and the lower part of the scraper is in contact with the upper surface of the second body, when the second body moves forward, a groove is formed on the upper surface of the second body, and when the scraper is raised and lowered, the second body and the scraper do not come into contact, so a groove is not formed.

[0096] In the present invention, as an example of a scraper (S), a pin is coupled to the end of a valve so that the pin is raised and lowered by the operation of the valve, thereby selectively forming a groove (8). However, the scraper may also be coupled to an elevating and lowering unit (not shown in the drawing) such as an actuator so as to be raised and lowered.

[0097] The above scraper is repeatedly raised and lowered so that the grooves (8) are formed along the length of the handrail, and a plurality of grooves are formed at predetermined intervals so that the user can easily visually check the operating status of the handrail.

[0098] And the scraper (S) may be installed in the third mold (230), or installed between the third mold (230) and the fourth mold (240), or installed inside the fourth mold (240), but this is not limited to the present invention.

[0099] In this way, the body (16) in which the groove (8) is formed by the scraper is introduced into the fourth mold, and as the third raw material is injected into the groove (8), the display portion (18) is formed.

[0100] And, a check valve is installed in the gate of the fourth mold (240) so that the third raw material is injected only into the section where the groove (8) is formed.

[0101] Meanwhile, the present invention may be arranged to further include a fifth mold (250) for smoothly forming the outer shape of the handrail.

[0102] Lastly, the sixth step (S600) is a finishing step to ensure that the outer shape of the handrail is formed smoothly.

[0103] In the fifth mold, a fourth body hole (not shown) having a cross-sectional area slightly larger than that of the third body hole (242) is formed, so that the second raw material pushed out to the upper surface of the second body during the process of forming the groove (8) by the scraper is smoothed flat.

[0104] The above fifth mold is a step to improve the quality of the handrail, so it is not an essential mold and may be omitted depending on the user's needs.

[0105] In this way, the manufacturing mold according to the present invention has a remarkable effect of preventing safety accidents by forming a display portion on the handrail during the handrail manufacturing process, thereby allowing a user to easily visually check whether the escalator is operating when the handrail is operated.

[0106] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is only for the purpose of explaining the invention, and a person having ordinary knowledge in the technical field to which the present invention pertains will be able to understand that various modifications or equivalent embodiments are possible from the detailed description of the invention.

[0107] Therefore, the true scope of the present invention should be determined by the technical idea of ​​the patent claims.

Claims

1. A manufacturing mold for manufacturing a handrail having a long length, a canvas on the bottom, and a metal cable built into the center, comprising a horizontal portion, a round portion extending from both ends of the horizontal portion and curled in a downward inward direction, and an end portion extending inward from the end of the round portion. A first mold having a canvas hole formed on the upper side of the canvas hole to allow the canvas to be transported while maintaining a specific shape, and a metal cable hole formed on the upper side of the canvas hole to allow a metal cable to pass through and guide the movement of the metal cable; A second mold having a first body hole formed therein so that a first body that forms the horizontal portion and the round portion integrally with the canvas and metal cable that pass through the first mold is formed at the rear end of the first mold; A third mold having a second body hole formed therein so that a second body, which is installed at the rear end of the second mold and forms the entire horizontal portion, round portion, and end portion integrally with the first body that has passed through the second mold, is formed; A scraper installed at the rear end of the third mold, and configured to be raised and lowered so that it comes into contact with the upper surface of the second body as it is lowered, so that a groove is selectively formed on the upper surface of the second body; and A handrail manufacturing mold characterized by including a fourth mold, which is installed at the rear end of the third mold and has a third body hole having the same shape as the second body hole, but has a valve mounted on the gate to form a display portion by injecting synthetic resin only into the groove formed by the scraper.

2. In paragraph 1, A handrail manufacturing mold characterized in that a gate is formed on the upper part of the second mold, and a pair of runners connected to the gate are respectively connected to round portions formed at both ends of the handrail.

3. In paragraph 1, A handrail manufacturing mold characterized in that a gate is formed in the upper center of the third mold, and a runner connected to the gate is connected to an end portion formed at the lower end of both ends of the handrail.

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