JP2023154728A - Packing for sealing between door edge part and opening edge part - Google Patents

Abstract

To provide a packing for sealing between a door edge part and an opening edge part, which does not need large power upon closing a door, and capable of being prevented from bending to leak cold air, etc., even after long-time use.SOLUTION: A packing 3 for sealing between a door edge part and an opening edge part comprises: a mounting base part 31 attached to one of a door edge part 22 and an opening edge part; and a hollow seal part 32 made of a rubber elastic material, provided integrally with the mounting base part 31, and brought into pressure contact with the other of the door edge part and the opening edge part 11 when the door is closed. The seal part 32 has a central wall 321 and a pair of side walls 322 each having a convex curved cross section convex toward an external surface side, and connected to each other so that an internal corner is formed between adjacent external surfaces.SELECTED DRAWING: Figure 4

Description

This invention relates to the edge of a hinged door (hereinafter sometimes referred to as the "door edge"), and the door that can be opened and closed by the door in, for example, prefabricated refrigerator-freezers, warehouses, work rooms, distribution centers, etc. The present invention relates to a packing used for sealing between an edge of an opening (hereinafter sometimes referred to as an "opening edge").

This type of packing is known, for example, as described in Patent Document 1 below.
The packing is made of rubber elastic material such as synthetic rubber, and has a mounting base that is attached to the edge of the door of the freezer, etc., and is provided integrally with the mounting base and is attached to the opening frame (opening edge) of the freezer, etc. when the door is closed. It includes a hollow seal portion that can be brought into pressure contact.
The seal part has a substantially arc-shaped cross section, and when the door is closed, a part of its outer surface is brought into pressure contact with the opening frame while being elastically deformed under a compressive load. .

Utility Model Publication No. 6-69679

However, in the case of the above-mentioned conventional packing, when the door is closed, the seal portion, which has a substantially arcuate cross section, is difficult to elastically deform (compressively deform), and its repulsive force may require a relatively large force to close the door. Ta.
In addition, in the case of the above packing, if it is used for a long period of time, the elastic restoring force of the seal part decreases and it becomes easy to get bent, and as a result, a gap is created between the seal part and the opening frame, and the gap There was a risk of cold air leaking from the

This invention was made in view of the above-mentioned problems, and is a door that does not require a large amount of force when closing, and is less likely to get bent and cause cold air to leak even after long-term use. The object is to provide a packing for sealing between the edges and the edges of the opening.

This invention consists of the following aspects in order to achieve the above object.

1) a mounting base that is attached to either the door edge or the opening edge;
It is made of a rubber elastic material and is provided integrally with the mounting base, and includes a hollow seal part that is brought into pressure contact with either the door edge or the opening edge when the door is closed,
The seal portion includes a central wall and a pair of walls, each having a convex curved cross section that is convex toward the outer surface side, and connected to each other so that an inner corner is formed between the outer surfaces of adjacent ones. Packing for sealing between the door edge and the opening edge, having a side wall of .

2) The sealing portion further includes a pair of rising walls that protrude from the mounting base and are respectively connected to one end edge of the pair of side walls such that an inner corner is formed between the outer surfaces of the pair of side walls. The packing for sealing between the door edge and the opening edge according to 1) above.

In the packing for sealing between the door edge and the opening edge in 1) above, when the seal part receives a compressive load when the door is closed, the central wall is elastically deformed (compressively deformed) so as to stretch and spread on both sides. .
Accordingly, this packing is more likely to collapse when the door is closed and has a smaller repulsive force than the conventional packing whose cross section is substantially arc-shaped, so that the door can be closed relatively easily.
In addition, according to this packing, even if the seal part receives a compressive load when the door is closed, it does not receive a large load (stress), so even after long-term use, it does not get bent easily and prevents leakage of cold air, etc. It can be avoided.

According to the packing for sealing between the door edge and the opening edge of the above 2), the effect of the packing of the above (1) can be more reliably obtained by providing a pair of rising walls in the sealing portion.

1 is a front view of a prefabricated refrigerator-freezer to which a sealing packing between a door edge and an opening edge according to the present invention is applied, showing an embodiment of the present invention. FIG. 2 is an enlarged sectional view taken along line II-II in FIG. 1. FIG. FIG. 3 is an enlarged sectional view corresponding to FIG. 2 showing a state where the door of the prefabricated refrigerator-freezer is not closed. The same packing is shown, in which (a) is an enlarged cross-sectional view of the state before the door is closed (before elastic deformation), and (b) is an enlarged cross-sectional view of the state when the door is closed (during elastic deformation). .

Embodiments of the invention will be described below with reference to FIGS. 1 to 4.
In the following explanation, "top and bottom" and "left and right" refer to the top and bottom, left and right of Figure 1, "front" refers to each bottom of Figures 2 and 3, and "rear" refers to each of Figures 2 and 3. The above shall be referred to as above.

In this embodiment, the packing for sealing between the door edge and the opening edge according to the present invention is applied to the doorway of a prefabricated refrigerator-freezer.
As shown in FIG. 1, a vertical rectangular opening (10) serving as an entrance and exit is formed at a predetermined location on a wall (1) of a prefabricated refrigerator-freezer. An opening frame (11) (opening edge) is attached around the opening (10). A door (2) for opening and closing the opening (10) is attached to one side frame portion (the left side frame portion in the figure) of the opening frame (11) via a hinge (4).
As shown in FIGS. 2 and 3, a packing (3) is attached to the edge of the door (2) for sealing the opening frame (11) when the door is closed. Note that the packing (3) may be attached to the opening frame (11) in some cases.

The wall (1) of a prefabricated refrigerator-freezer is usually composed of heat-insulating panels. Although detailed illustrations have been omitted, the heat insulating panels constituting the wall (1) include, for example, two front and back front panels made of metal plates such as colored steel plates, and upper and lower panels of both front panels made of synthetic resin such as PVC. A frame material is used that is interposed and fixed between the left and right edges, and a heat insulating material made of synthetic resin foam, rock wool, etc. is filled in the internal space surrounded by both surface plates and the frame material. .

As shown in FIGS. 2 and 3, the opening frame (11) is made of, for example, a synthetic resin material such as PVC having a substantially L-shaped cross section. The front part (111) of the opening frame (11) is arranged along the front part of the opening edge of the wall (1). Further, the side surface portion (112) of the opening frame (11) is arranged along the end surface portion of the opening edge of the wall (1). Although detailed illustrations are omitted, the opening frame (11) is fastened and fixed to the rear surface of the opening edge of the wall (1), etc., using screw members, for example, via a mounting bracket having an L-shaped cross section. . When the door is closed, the sealing part (32) of the packing (3), which will be described later, is brought into pressure contact with a predetermined surface part (the left front part in the figure) of the front part (111) of the opening frame (11). .

The door (2) is usually made of a heat insulating panel, and similarly to the heat insulating panel constituting the wall (1), the door (2) is made of two front and back surface plates (21A) (21B) made of metal plates such as colored steel plates, for example. , a frame material (22) made of synthetic resin such as PVC and fixed between the top, bottom, left and right edges of both surface plates (21A) and (21B), and a frame material (22) made of synthetic resin foam, rock wool, etc. It includes a heat insulating material (23) filled in an internal space surrounded by face plates (21A) (21B) and a frame member (22).
A packing attachment portion is formed in the frame member (22) at a location that faces the front portion (111) of the opening frame (11) when the door is closed. The illustrated packing mounting portion consists of a packing mounting groove (221) that opens rearward and has a generally U-shaped cross section. One or more (three in the figure) engagement protrusions (221a) are formed on both side surfaces of the packing attachment groove (221), respectively.

As shown in detail in FIG. 4, the packing (3) has a mounting base (31) that is attached to the packing mounting groove (221) (door edge) of the frame material (21) of the door (2), and a mounting base (31 ) and a hollow seal part (32) which is provided in one piece and is brought into pressure contact with the opening frame (11) (opening edge) when the door is closed.
The packing (3) of this embodiment is made of an integrally molded product made of a rubber elastic material, and its longitudinal direction is along the longitudinal direction of the frame member (22) of the door (2). Examples of the rubber elastic material forming the packing (3) include thermoplastic elastomer (TPE), natural rubber, silicone rubber, and ethylene propylene rubber (EPDM).

The mounting base (31) of the packing (3) is hollow and has a substantially rectangular cross section that is fitted into the packing mounting groove (221). Fin portions (311) that engage with the engagement protrusions (221a) of the packing attachment groove (221) are formed on the outer surfaces of both side walls of the attachment base (31). These protruding portions (221a) and fin portions (311) are engaged with each other to prevent the mounting base (31) from accidentally coming off from the packing mounting groove (221).
Further, the mounting base (31) is provided with two projecting parts (312) extending outward in the left-right direction from the rear end portions of both side walls thereof. These projecting portions (312) come into contact with both edges of the opening of the packing mounting groove (221) in the frame material (22) of the door (2), so that the mounting base (31) of the packing (3) is secured when the door is closed. The packing (3) is prevented from entering the packing mounting groove (221) more than necessary, and the packing (3) is held in a proper position.

The seal portions (32) of the packing (3) each have a convex curved cross section that is convex toward the outer surface, and are connected to each other so that an inner corner is formed between the outer surfaces of adjacent ones. It has a central wall (321) and a pair of left and right side walls (322) that are connected to each other.
Further, the seal portion (32) protrudes from the mounting base (31) and is arranged at one end edge of both side walls (322) so that an inner corner is formed between the outer surfaces of the left and right pair of side walls (322). It has a pair of left and right rising walls (323) connected to the front edge), respectively. More specifically, the pair of rising walls (323) extend briefly from both left and right end edges of the rear surface of the mounting base (31) outward in the left-right direction and diagonally rearward.
The thickness of the seal portion (32) is not particularly limited, and is appropriately set in consideration of sealing performance, ease of closing the door (2), and the like.

When closing the door (2), the outer surface of the packing (3) near the top of the center wall (321) in the sealing portion (32) is first brought into pressure contact with the front surface (111) of the opening frame (11). As a result, it receives compressive loads from the front and rear directions.
In the seal portion (31) subjected to a compressive load, the central wall (321) gradually becomes flattened and expands in the left-right direction, and the pair of side walls (322) move outward in the left-right direction to separate from each other and move back and forth. The curvature becomes slightly larger as it is compressed in the direction, and the pair of upright walls (323) are deformed so as to fall slightly outward in the left-right direction (see FIG. 4(b)).
When the door (2) is completely closed, most of the outer surface of the flattened central wall (321) of the sealing part (32), excluding both ends, or the entire outer surface of the flattened central wall (321) is covered with the opening frame (11). ) is brought into pressure contact with the surface of the front part (111). Alternatively, in addition to the outer surface of the center wall (321), a portion of the outer surface of both side walls (322) (the rear end near the center wall (321)) is connected to the front surface (111) of the opening frame (11). In some cases, it may be pressed against a surface. At this time, the stress generated inside the seal portion (32) decreases in the order of the center wall (321), the pair of rising walls (323), and the pair of side walls (322), and especially the stress on both side walls (322). is not subject to such a heavy load. Furthermore, the stress generated inside the seal portion (32) as a whole when the door is closed is reduced compared to conventional packing having a substantially arc-shaped cross section.
As described above, according to the packing (3) of the above embodiment, the seal portion (32) is easily crushed when the door is closed, and the repulsive force thereof is small, so that the door (2) can be closed relatively easily. In addition, according to the same packing (3), even if the seal part (32) receives a compressive load when the door is closed, it does not receive a very large load (stress), so even if it is used for a long period of time, it will not get bent easily, and can effectively avoid leakage.

Note that the sealing packing between the door edge and the opening edge according to the present invention is not limited to the above embodiments, and may be modified as appropriate without departing from the gist of the present invention as set forth in the claims. Of course, it is also possible to implement the above.
For example, a magnet such as a rubber magnet is arranged and fixed in the internal space of the sealing part of the packing, and when the door is closed, the magnet is configured to be magnetically attached to a magnetic member such as a steel plate provided in the opening frame. It is also possible to do so.
Further, the packing may be formed by integrally bonding a seal portion formed of a rubber elastic material and a mounting base formed of a material other than the rubber elastic material (for example, hard resin, etc.).

The present invention is suitable as a packing for sealing between the edge of a swinging door and the edge of an opening opened and closed by the door in prefabricated refrigerator-freezers, warehouses, work rooms, distribution centers, etc. used.

(1)：Wall
(10): Opening
(11): Opening frame (opening edge)
(2)：Door
(21): Frame material (door edge)
(3)：Packing
(31): Mounting base
(32): Seal part
(321): Central wall
(322): Side wall
(323): Rising wall

Claims (2)

a mounting base that is attached to either the door edge or the opening edge;
It is made of a rubber elastic material and is provided integrally with the mounting base, and includes a hollow seal part that is brought into pressure contact with either the door edge or the opening edge when the door is closed,
The seal portion includes a central wall and a pair of central walls each having a convex curved cross section convex toward the outer surface side and connected to each other so that an inner corner is formed between the outer surfaces of adjacent ones. Packing for sealing between the door edge and the opening edge, having a side wall of . The sealing portion further includes a pair of rising walls protruding from the mounting base and each connected to one end edge of the pair of side walls such that a corner is formed between the outer surfaces of the pair of side walls. The packing for sealing between the door edge and the opening edge according to claim 1.

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