Door panel for elevator

Abstract

To provide a door panel for an elevator, which can be reduced in weight while secured for strength.SOLUTION: The door panel for an elevator comprises a rectangular frame, and an inner panel attached in the rectangular frame. The inner panel is made of a composite material formed by laminating a first thin plate, a second thin plate, and an intermediate material provided between the first thin plate and the second thin plate.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Embodiments of the present invention relate to an elevator door panel.

Background Art

[0002] An elevator door panel is composed of a steel plate, and a reinforcing member is attached to the back surface of the steel plate to increase its strength. By attaching the reinforcing member, the strength of the door panel can be increased, and it is possible to make it difficult to cause deflection. Since this reinforcing member is fixed to the steel plate by spot welding using a laser beam or resistance welding, spot marks are formed on the surface of the steel plate. When there are spot marks on the surface of the steel plate, the aesthetic property of the door panel is deteriorated, so a decorative plate is attached to the surface of the steel plate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When installing the door panel configured as described above in an elevator landing, in order to ensure such strength that no deflection occurs even if a person or an object accidentally collides when the door is closed, it is necessary to install a plurality of reinforcing members on each door panel. However, since the reinforcing member is made of steel, when a plurality of reinforcing members are installed, there is a problem that the weight of the door panel increases and the door opening / closing speed becomes slow.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide an elevator door panel capable of achieving weight reduction while ensuring strength.

Means for Solving the Problems

[0006] According to an embodiment for achieving the above object, an elevator door panel includes a rectangular frame and an inner panel mounted within the rectangular frame. The inner panel is made of a composite material in which a first thin plate, a second thin plate, and an intermediate material provided between the first thin plate and the second thin plate are laminated. [Brief description of the drawings]

[0007]

Figure 1

Figure 2

Figure 3

[0008] 1 is a front view of an elevator door panel 1 according to one embodiment. The door panel 1 includes a rectangular frame 10, an inner panel 20 attached to the frame 10, and a reinforcing member 30 attached to the back surface of the inner panel 20.

[0009] Fig. 2 is a cross-sectional view of the door panel 1 of Fig. 1 taken along line AA. The frame 10 has a frame member 11 formed in a U-shape, an abutting member 12 fixed to the inside of the U-shape of the frame member 11 and against which an end of the inner panel 20 abuts, and a fixing member 13 having a step and using this step to fix the abutting member of different thickness to the inner panel 20. The frame member 11, the abutting member 12, and the fixing member 13 are made of, for example, steel.

[0010] Since the frame member 11 is formed in a U-shape, the end of the door panel 1 has a width in the thickness direction of a predetermined length L. As a result, even if the door panel 1 is installed at an elevator landing and a person is caught between the door panels 1 while the elevator is in operation, the impact on the person can be reduced.

[0011] The inner panel 20 is composed of a composite material in which a first thin plate 21, a second thin plate 22, and an intermediate material 23 provided between the first thin plate 21 and the second thin plate 22 are laminated.

[0012] The first thin plate 21 is composed of a plate material with aesthetic properties on the surface that becomes the outer surface of the inner panel 20, such as SUS (Steel Use Stainless) or a painted plate material, a plate material covered with a vinyl sheet with a pattern processed thereon, or a melamine resin plate with flame retardancy. The second thin plate 22 is composed of a steel material capable of welding.

[0013] The intermediate material 23 is composed of a material having flame retardancy and a strength equal to or greater than a predetermined value against impact, such as aluminum hydroxide paper or a metal honeycomb structure. As shown in FIG. 3, the intermediate material 23 may enclose an additional member 200 having at least one of heat insulation or sound absorption in the void portion 110 of the honeycomb structure 100. For example, by filling the void portion 110 of the honeycomb structure 100 with a silica-based powder as the additional member 200, an intermediate material 23 having high-performance heat insulation can be configured.

[0014] The reinforcing member 30 is a member installed to increase the strength of the door panel 1 and make it difficult to bend. The reinforcing member 30 is made of metal, positioned at a predetermined location on the back surface of the second thin plate 22, and fixed to the second thin plate 22 by spot welding by applying laser light to the position indicated by point P in FIG. 2. In FIG. 1, the case where two reinforcing members 30 are installed in the long-side direction within the inner panel 20 is shown, but it is not limited thereto, and one or three or more may be installed in the long-side direction or the short-side direction.

[0015] The door panel 1 configured as described above is installed such that the first thin plate 21 faces the elevator landing side and the second thin plate 22 faces the car side. From the landing side, the frame 10 of the door panel 1 and the surface of the first thin plate 21 can be visually recognized by the user.

[0016] [Effects of the Embodiment] The door panel 1 configured as described above includes a rectangular frame 10 and an inner panel 20 attached within the rectangular frame 10. The inner panel 20 is composed of a composite material in which a first thin plate 21, a second thin plate 22, and an intermediate material 23 provided between the first thin plate 21 and the second thin plate 22 are laminated.

[0017] By forming the inner panel 20 with a composite material in this way, the strength of the door panel 1 is increased. When the strength of the door panel 1 is increased, it becomes less likely to bend, and changes such as using a lighter material, narrowing the width, reducing the plate thickness, or decreasing the number of installations of the reinforcing member 30 compared to the conventional case become possible, enabling the weight reduction of the door panel 1. Also, if the strength of the door panel 1 can be sufficiently increased by the configuration of the inner panel 20, the reinforcing member 30 may not be installed, further enabling the weight reduction of the door panel 1.

[0018] Moreover, by integrally forming the inner panel 20 as a composite material, when assembling as an elevator door panel, it is no longer necessary to assemble a reinforcing member, a heat insulating member, a decorative plate material with aesthetic properties, and a plate material for the welding surface as separate parts for the purpose of improving strength, so the assembly man-hours can also be reduced.

[0019] Also, by configuring the intermediate material 23 with aluminum hydroxide paper or a metal honeycomb structure, while achieving weight reduction, the strength of the door panel 1 can be further increased.

[0020] Moreover, by enclosing an additional member 200 having at least one of heat insulation or sound absorption in the intermediate material 23, the door panel 1 can be provided with at least one of heat insulation or sound insulation.

[0021] Moreover, by forming the second thin plate 22 from a steel plate capable of being welded, the reinforcing member 30 can be spot welded by laser processing or the like. Even if welding is performed on the second thin plate 22, since the intermediate member 23 and the first thin plate 21 are laminated on the second thin plate 22, the spot marks due to spot welding will not be visible to the users on the landing side. The surface of the door panel 1 that is visible to the users on the landing side is the surface of the first thin plate 21 with high aesthetic properties.

[0022] Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0023] 1…Door panel, 10…Frame, 11…Frame member, 12…Butting member, 13…Fixing member, 20…Inner panel, 21…First thin plate, 22…Second thin plate, 23…Intermediate member, 30…Reinforcing member, 100…Honeycomb structure, 110…Void portion, 200…Additional member

Claims

1. A rectangular frame and an internal panel mounted within the rectangular frame, wherein the internal panel is composed of a composite material formed by laminating a first thin plate, a second thin plate, and an intermediate material provided between the first thin plate and the second thin plate, and is a door panel of an elevator.

2. The elevator door panel according to claim 1, wherein the intermediate material is composed of aluminum hydroxide paper or a metal honeycomb structure.

3. The elevator door panel according to claim 2, wherein a member having at least one of heat insulation or sound absorption is enclosed in the voids of the honeycomb structure.

4. The elevator door panel according to claim 1, wherein the second thin plate is composed of a steel plate that can be welded.

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