JP6702694B2 - Switchgear device - Google Patents

Description

The present invention relates to an opening/closing device used in a frozen warehouse or a refrigerated warehouse.

For example, a refrigerator, a freezer, or the like (hereinafter, referred to as “freezer/refrigerator”) may be provided with an opening/closing body device that is configured to easily suppress cold air leakage from the opening when the heat insulating door is opened. The opening/closing body of this opening/closing body device for a refrigerating warehouse is composed of a sheet, a screen, or the like. This opening/closing body device is generally provided inside the heatproof door. It is desirable that the opening/closing body has high airtightness in order to maintain the temperature inside the refrigerating warehouse. On the other hand, due to the structure of the opening/closing body device, even when the opening/closing body fed out from the winding shaft closes the opening, there is a gap between the opening/closing body and the upper wall of the interior of the opening/closing body storage portion. Occurs. Several configurations for closing the gap have been proposed (see, for example, Patent Documents 1 and 2).

The opening/closing device disclosed in Patent Document 1 is an opening/closing device including an opening/closing body that divides a space and a fixing portion arranged around the opening/closing body, and between the opening/closing body and the fixing portion in a closed state. A space is formed which connects the spaces on both sides partitioned by the opening/closing body. In order to close at least a part of the gap, a gap closing means is provided on at least one of the opening/closing body and the fixed portion. This improves the blocking performance and the blocking performance.

The opening/closing device disclosed in Patent Document 2 is an opening/closing device that performs a closing operation by sliding an end portion in the closing direction of the opening/closing body. A flexible sheet-like closing body that is attached and has the other end as a free end. The flexible sheet-shaped closing body brings the free end portion into contact with the receiving portion that is integral with the immovable portion when the opening/closing body is substantially fully closed. The closing body bends the intermediate portion, and brings the bent intermediate portion into contact with the contact portion integral with the immovable portion in the width direction of the opening/closing body. As a result, the opening/closing body closes a gap communicating with the front and rear of the opening/closing body with the contact portion.

JP, 2002-38841, A JP, 2006-46026, A

However, in a refrigerated warehouse, especially in a frozen warehouse, the internal temperature becomes about -30°C. Therefore, due to the difference in temperature between inside and outside of the compartment, dew condensation may occur in each part of the switchgear, that is, due to a difference in the constituent materials, that is, a part that is not a heat-insulating material, and further freezing may occur. In addition, since the gap closing means and the flexible sheet-like closing body (hereinafter referred to as "gap closing member") have low heat insulating property, when the inside and the outside are partitioned, the outside surface Therefore, dew condensation is likely to occur, and freezing occurs between the gap closing member and the contact portion. As a result, the gap blocking member may stick to the fixed portion or the contact portion. In addition, when the gap blocking member becomes hard due to low temperature, it cannot be bent and cannot come into contact with the fixed part or contact part at all, or the fixed part or contact part cannot be evenly contacted by a surface. That is, there is a possibility that the gap closing function may not be exerted.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent deterioration of the gap closing function of the gap closing member of the opening/closing body device installed in a refrigerating warehouse or the like, and improve the airtight performance of the opening/closing body. An object of the present invention is to provide an opening/closing body device capable of performing the above.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The opening/closing body apparatus 11 according to claim 1 of the present invention has a pair of parallel guide rails 17 fixed to the left and right edges of the opening 23 of the warehouse 21 sandwiching the upper edge of the inner surface of the warehouse. 43 is guided to open and close the opening 23 inside the heat insulating door 61 ;
A winding shaft 15 which is rotatably arranged along the upper edge portion and which winds and unwinds the opening/closing body 19.
A contact portion 25 provided on the inner surface of the refrigerator along the winding shaft 15 above the upper edge portion;
The opening/closing body 19 with the opening 23 closed is provided on the opening/closing body 19 along the winding shaft 15 on the base end side in the feeding direction, and extends from the opening/closing body 19 to come into contact with the contact portion 25. A gap closing member 27 having flexibility,
A heating wire 29 provided on the contact portion 25 along the gap closing member 27 and heating at least the gap closing member 27 to 0° C. or higher;
It is characterized by including.

In the opening/closing body device 11, in the state where the opening/closing body 19 closes the opening 23, the gap closing member 27 provided on the base end side in the feeding direction of the opening/closing body 19 contacts the contact portion 25 along the winding shaft 15. Contact. The heating wire 29 heats the contact portion 25 and the gap closing member 27 so that the gap closing member 27 is at least 0° C. or more even at a low temperature of about −30° C. Thereby, the gap closing member 27 can be prevented from being hardened by a low temperature. In other words, the gap blocking member 27 can be expected to have flexibility even in a low-temperature storage room of a refrigerating warehouse, for example, at a low temperature of about −30° C., and the contact portion 25 can be provided over the entire width direction of the opening/closing body 19. Stick to. As a result, the gap between the opening/closing body 19 and the upper edge of the opening 23 is closed. Further, the contact portion 25 also becomes 0° C. or higher due to the heating of the heating wire 29. Therefore, the gap blocking member 27 can be prevented from sticking to the contact portion 25 due to freezing, and also can be prevented from being damaged during winding.

The opening/closing device 11 according to claim 2 of the present invention is the opening/closing device 11 according to claim 1,
The guide rail 17 includes an outer rail 37 and an inner rail 39 attached inside the outer rail 37, and the opening/closing body 19 is guided by the inner rail 39.
The outer rail 37 has a surface along the extending direction of the opening/closing body 19 that closes the opening 23 in the same direction as the one side surface on the upper edge side where the contact portion 25 is provided. A heating wire 29 is provided.

Further, the opening/closing device 11 according to claim 3 of the present invention is the opening/closing device according to claim 2,
The outer rail 37 is fixed to the heat insulating wall 35 that forms the left and right edges of the opening 23, and the heating wire 29 provided on the outer rail 37 is disposed close to the heat insulating wall 35 side of the outer rail 37. It is characterized by

In this opening/closing device 11, the heating wire 29 provided on the outer rail 37 prevents dew condensation and freezing on the outer rail 37 outside the shutter curtain when the heat shield door 61 is opened, which is close to the outside air temperature. The heating wire 29 provided on the outer rail 37 prevents the inner rail 39 from freezing when the heat insulating door 61 is closed, and prevents the movement of the shutter curtain 19 from being hindered.

An opening/closing body device 11 according to claim 4 of the present invention is the opening/closing body device according to claim 2 or 3,
The outer rail 37 is fixed to the heat insulating wall 35 via a vertical frame 53, and the vertical frame 53 is provided with an electric heating wire 29 along with an electric heating wire 29 provided on the outer rail 37. Characterize.

The opening/closing device 11 according to claim 5 of the present invention is the opening/closing device according to claim 4,
The vertical frame 53 is fixed by a fixing bolt 59 penetrating the heat insulating wall 35, and the heating wire 29 provided on the vertical frame 53 is arranged close to the head of the fixing bolt 59. To do.

In the opening/closing device 11, the heating wire 29 provided on the vertical frame 53 is arranged close to the head of the fixing bolt 59. As a result, in the heating wire 29, the fixing bolt 59 has a low temperature, and condensation and freezing that occur outside the heat insulating wall 35 are prevented.

The opening/closing device 11 according to claim 6 of the present invention is the opening/closing device according to claim 4 or 5,
The pair of left and right vertical frames 53 and the horizontal frame 55 located at an upper part between the pair of vertical frames 53 constitute a three-way frame 51 of the opening 23, and the horizontal frame 55 has a heating wire rod. 29 is provided.

In the opening/closing device 11, the heating wire 29 provided on the horizontal frame 55 warms the curtain entrance/exit portion 33. As a result, the heating wire 29 of the horizontal frame 55 prevents dew condensation at the curtain entrance/exit portion and freezing after the dew condensation, and prevents the shutter curtain 19 from being opened or closed.

The opening/closing body apparatus 11 according to claim 7 of the present invention is the opening/closing body apparatus 11 according to any one of claims 1 to 6,
The contact portion 25 is made of a metal material, has at least the entire length in the width direction of the opening/closing body 19 along the upper edge portion, and the heating wire 29 is connected via the plate portion of the gap closing member 27 with which the contact portion 25 contacts. It is characterized by being fixed.

In this opening/closing body device 11, since the contact portion 25 is made of a metal material, the heat from the heating wire 29 is uniformly transferred to the entire length of the contact portion 25 due to good thermal conductivity. Since the contact portion 25 has the entire length in the width direction of the opening/closing body 19, it is possible to warm the entire gap closing member 27 in the width direction.

The opening/closing device 11 according to claim 8 of the present invention is the opening/closing device 11 according to claim 7,
The contact portion 25 has a heating wire rod accommodation space 49 that is closed on the side opposite to the contacting side of the gap closing member 27, and the heating wire rod 29 is fixed in the heating wire rod accommodation space 49 and It is characterized by being fixed to the edge.

In the opening/closing body device 11, the contact portion 25 has a heating wire rod accommodation space 49 on the side opposite to the surface side of the gap closing member 27 in contact. Since the heating wire 29 is provided in the heating wire accommodation space 49, the heating efficiency is higher than that in the case where the heating wire 29 is directly exposed to the atmosphere inside the freezer-refrigerating warehouse 21, for example.

According to the opening/closing body apparatus of claim 1 of the present invention, the contact portion and the gap closing member are heated by the heating wire so that the gap closing member is at least 0° C. or higher in the state where the opening/closing body closes the opening. Therefore, it is possible to avoid the gap closing member from being hardened by a low temperature, that is, the gap closing member has flexibility even in a low temperature of about −30° C. in a freezer-refrigerating warehouse, for example. It can be expected that the opening and closing body will come into close contact with the contact portion over the entire width direction of the opening and closing body, and as a result, the gap between the opening and closing body and the upper edge portion of the opening can be closed. Further, the contact portion also becomes 0° C. or higher due to the heating of the heating wire, so that the gap closing member can be prevented from sticking to the contact portion due to freezing, and can be prevented from being damaged during winding. It is possible to prevent deterioration of the gap closing function of the gap closing member and improve the airtight performance of the opening/closing body.

According to the opening/closing body apparatus of the second aspect of the present invention, the heating wire provided on the outer rail prevents dew condensation or freezing on the outer side of the shutter curtain approaching the outside air temperature when the heat insulating door is opened. To do. Further, the heating wire provided on the outer rail prevents the inner rail from freezing when the heat-insulating door is closed, and prevents the movement of the shutter curtain from being hindered.

According to the opening/closing body apparatus of claim 3 of the present invention, the heating wire provided on the heat insulating wall side of the outer rail has a dew condensation on the outer side of the shutter curtain which approaches the outside air temperature when the heat insulating door is opened. , Prevent freezing. Further, the heating wire provided on the outer rail prevents the inner rail from freezing when the heat-insulating door is closed, and prevents the movement of the shutter curtain from being hindered.

According to the opening/closing body apparatus of claim 4 of the present invention, the heating wire provided on the vertical frame prevents dew condensation at the curtain entrance/exit and freezing after dew condensation, and prevents the shutter curtain from being opened or closed. ing.

According to the opening/closing body apparatus of the fifth aspect of the present invention, the heating wire provided on the vertical frame is arranged close to the head of the fixing bolt. As a result, in the heating wire, the fixing bolt has a low temperature to prevent dew condensation and freezing that occur outside the heat insulating wall.

According to the opening/closing body apparatus of the sixth aspect of the present invention, the heating wire provided in the horizontal frame warms the curtain entrance/exit portion. As a result, the heating wire of the horizontal frame prevents dew condensation at the entrance/exit of the curtain and freezing after dew condensation, and prevents the shutter curtain from being opened or closed.

According to the opening/closing body apparatus of claim 7 of the present invention, since the contact portion is made of a metal material, the heat from the heating wire is uniformly transferred to the entire length of the contact portion due to good thermal conductivity. Therefore, the contact portion having the entire length in the width direction of the opening/closing body can warm the entire width direction of the gap closing member, and can stably prevent the gap closing member from freezing.

According to the opening/closing body apparatus of claim 8 of the present invention, the heating wire is provided in the heating wire accommodation space of the contact portion, so that the heating wire is placed, for example, by being directly exposed to the internal atmosphere of the refrigerating warehouse. In comparison with the case of the above, the heat generation efficiency is increased, and the heating efficiency of the contact portion can be increased.

It is a block diagram which shows the outline of the opening/closing body apparatus which concerns on embodiment of this invention. It is sectional drawing by the surface orthogonal to the winding axis of the shutter curtain storage part shown in FIG. FIG. 2 is an enlarged plan sectional view of an essential part of one guide rail shown in FIG. 1 and members provided in the vicinity thereof.

Embodiments according to the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram showing an outline of an opening/closing body device 11 according to an embodiment of the present invention, FIG. 2 is a sectional view taken along a plane orthogonal to a winding shaft 15 of a shutter curtain housing portion 13 shown in FIG. 1, and FIG. FIG. 2 is an enlarged plan cross-sectional view of an essential part of one guide rail 17 shown in FIG. 1 and various members provided in the vicinity thereof.
The opening/closing device 11 according to the present embodiment is provided in, for example, a freezing/refrigerating warehouse 21 or a warehouse or a building installed in a cold region. For example, a sheet-shaped shutter curtain 19 is used as an opening/closing body to open a building or a frozen/refrigerating warehouse 21. The opening 23, which is the entrance and exit of, is opened and closed. The opening/closing body may be a slat curtain, a screen, or the like. The opening/closing body device 11 has a guide rail 17, a shutter curtain 19, a winding shaft 15, a contact portion 25, a flap 27 as a gap closing member, and a heating wire 29 as main components. ..

The shutter curtain storage unit 13 is attached to the upper wall 31, which is the upper edge of the opening 23. The shutter curtain storage unit 13 stores a winding shaft 15 that is rotated by an electric switch (not shown). The winding shaft 15 is rotatably arranged along the upper wall 31, for example, above a lintel (not shown), and winds or unwinds the shutter curtain 19. The shutter curtain storage section 13 has a curtain entrance/exit section 33 (see FIG. 2) on the lower surface. A pair of guide rails 17 are fixed to the left and right edges of the opening 23 with the curtain entrance/exit portion 33 interposed therebetween.

A pair of guide rails 17 are fixed in parallel to the left and right heat insulating walls 35 that sandwich the upper edge of the opening 23 formed in the refrigerating and refrigerating warehouse 21. The guide rails 17 are spaced from each other with the opening 23 interposed therebetween and extend vertically in the vertical direction (vertical direction in FIG. 1 ).

In the present embodiment, the guide rail 17 includes an outer rail 37 and an inner rail 39 shown in FIG. The inner rail 39 is attached to the outer rail 37. The outer rail 37 is fixed to the heat insulating wall 35 by a three-sided frame described later.

Each inner rail 39 has a guide rail groove 41 (see FIG. 3) whose cross-sectional shapes orthogonal to the extending direction face each other, and is formed in a substantially U-shaped cross section. The guide rail groove 41 is formed in the shape of a dovetail groove that widens. The width of the guide rail groove 41 is formed to be slightly wider than the thickness of the shutter curtain 19. In the shutter curtain 19, the edge portion 43 is inserted into the guide rail groove 41, and the retaining member 47, which will be described later, is disposed in the space 45 on the back side of the guide rail groove 41. Accordingly, the left and right edges 43 of the shutter curtain 19 are held by the respective guide rails 17 so as to be vertically movable.

The shutter curtain 19 is wound around the winding shaft 15, and the edge portions 43 at both ends are arranged in the guide rail grooves 41, whereby the opening/closing movement is guided by the pair of guide rails 17 to open/close the opening 23.

The shutter curtain 19 may be a cloth screen, a soft resin sheet such as vinyl chloride or urethane, or a sheet material formed by coating the cloth screen with resin, rubber, or a rubber-like substance. When used for fire prevention, smoke prevention, or other disaster prevention purposes, for example, silica cloth or glass cloth, or a flame-retardant or fire-resistant coating material such as a flame-retardant coating material or a waterproof coating material, is sprayed or applied or impregnated on the cloth. It is possible to suitably use the ones. Further, the shutter curtain 19 may be combined with a reinforcing metal such as a wire mesh or a resin wire rod. In general, the shutter curtain 19 is generally opaque, but in order to provide a daylighting property and a see-through property, a window having a light-transmitting property is appropriately provided or a material having a light-transmitting property is used. It may be something to do.

The retaining members 47 are provided on the edge portions 43 on both sides in the width direction of the shutter curtain 19. In this embodiment, the retaining member 47 is fixed to the edge portion 43 of the shutter curtain 19 by welding, sewing, adhesion or the like. The retaining member 47 may be formed at the end of a strip-shaped wing (not shown) made of a resin material and fixed along the edge 43. The retaining member 47 is formed as, for example, an engagement bulge that is continuous along the extending direction of the edge portion 43. This engagement bulge has a so-called bead shape having a circular bulge in a plan sectional view. The engagement bulge 47 is inserted into the guide rail groove 41 from the upper end of the guide rail 17 so that the engagement bulge 47 is prevented from coming off the guide rail 17 and engages with the guide rail 17. As a result, the engagement bulge 47 movably supports the edge portions 43 on both sides of the shutter curtain 19 on the guide rail 17. The retaining members 47 prevent the edge portions 43 on both sides of the shutter curtain 19 from coming out of the guide rail groove 41. However, when a certain amount of strong pressure is applied to the shutter curtain 19, the shutter curtain 19 is damaged. In order to avoid the above, the retaining member 47 may be configured to be able to be removed from the guide rail groove 41.

As the retaining member 47, a coupling element row of a fastener can be used in addition to the engaging bulge. This engagement tooth row can be configured by a plurality of engagement elements or a spiral-shaped linear engagement body. The engagement tooth row is formed larger than the width of the guide rail groove 41 of the guide rail groove 41. In the shutter curtain 19, the engagement tooth rows of the left and right edge portions 43 are arranged in the inner space 45 of the guide rail groove 41, so that the shutter curtain 19 is prevented from coming off the guide rail 17. The shutter curtain 19 adopts a tooth row so that a high-strength retaining member can be easily and continuously formed on the edge portion 43 of the thin shutter curtain 19 at a low cost.

In addition, the retaining member 47 can be configured by forming a bag-shaped insertion portion on the edge portion 43 of the shutter curtain 19 and inserting a retaining wire along the edge portion 43 into this insertion portion. Further, the retaining member 47 may be a bolt nut fixed to the front and back of the edge portion 43.

The flap 27 is made of a flexible synthetic resin sheet material or the same material as the above-mentioned material of the shutter curtain 19. The flap 27 is provided on the shutter curtain 19 along the take-up shaft 15 on the base end side in the feeding direction of the shutter curtain 19 with the opening 23 closed, that is, the end side connected to the take-up shaft 15. The flap 27 bulges like a bag from the shutter curtain 19. The flap 27 bends the sheet material formed in a strip shape in the short width direction so as to open and close the shutter curtain 19, and the width direction of the shutter curtain 19 serves as the longitudinal direction, and the flap shape is long along the width direction. The long end edges of the shutter curtain 19 are fixed to the shutter curtain 19 in the width direction so that the shutter curtain 19 has a C-shape in which the cross-sectional shape perpendicular to the width direction is open, or an Ω shape. It becomes a bag shape. With the shutter curtain 19 closing the opening 23, the flap 27 bulges in a C-shape or an Ω-shape with respect to the surface of the shutter curtain 19 and abuts the contact portion 25, and the shutter curtain 19 and the upper wall 31. The gap between and is closed in the shutter curtain storage unit 13. Although the flap 27 is made of a material having flexibility at least at 0° C. or higher, it closes the gap between the shutter curtain 19 and the upper wall 31 even if the flap 27 does not reach flexibility. It only needs to have performance. The flap 27 closes this gap to prevent cold air leakage, air flow, insect entry, and the like.

It should be noted that the flap 27 may be configured such that one of the long end edges of the flap 27 is fixed to the shutter curtain 19 and the other end is a free end, that is, the configuration disclosed in Patent Document 2. Alternatively, the flap 27 may be formed in a fin shape and cantilevered with respect to the shutter curtain 19 so that the extending leading edge side abuts the contact portion 25.

The contact portion 25 is provided above the upper wall 31 along the winding shaft 15. In the present embodiment, the contact portion 25 is made of a substantially C-shaped channel material, and the opening side of this channel material faces the upper wall 31, and is fixed in the vicinity of the upper wall 31 side inner corner inside the shutter curtain storage portion 13. ing. In the present embodiment, the contact portion 25 uses a substantially C-shaped channel material, but it may be a plate-shaped material such as an L-shaped channel material or a hollow member such as a square pipe, and the flap 27 contacts. Any shape may be used as long as it has a plate portion having a surface to be processed. Further, the contact portion 25 may be one side surface inside the shutter curtain storage portion 13. In this case, the flap 27 directly abuts on one side surface (contact portion 25) in the shutter curtain storage portion 13 to close the gap.

The contact portion 25 is made of a metal material. The contact portion 25 has at least the entire length in the width direction of the shutter curtain 19 along the winding shaft 15. The contact portion 25 can be made of, for example, an extruded aluminum material. In this case, in the contact portion 25, a holding groove (not shown) for the heating wire 29 can be easily and highly accurately provided as a part of the cross-sectional shape of the extruded material.

The contact portion 25 is fixed to the upper wall 31 with the heating wire rod accommodation space 49 closed on the side opposite to the surface side of the flap 27 in contact. In the present embodiment, since the contact portion 25 is the above-described substantially C-shaped channel material, the outer surface of the plate-shaped portion contacts the flap 27, and the inner side becomes the heating wire rod accommodation space 49.

The heating wire 29 is provided on the contact portion 25 along the flap 27. In the present embodiment, the flap 27 is provided over the entire width of the shutter curtain 19 in the width direction. Therefore, the contact portion 25 and the heating wire 29 are provided in the shutter curtain storage portion 13 so as to extend over the entire width of the shutter curtain 19 in the width direction similarly to the flap 27. The heating wire 29 heats at least the flap 27 to 0° C. or higher. Here, the significance of heating the flap 27 to 0° C. or higher is that the flap 27 is frozen at the contact portion 25, particularly in order to prevent moisture such as dew condensation from becoming ice and becoming a frozen state. This is to dissolve the water and to reach a temperature at which condensation and freezing are prevented.

The heating wire 29 is fixed to the surface of the contact portion 25 opposite to the surface of the flap 27 in contact. That is, the heating wire rod accommodation space 49 is exposed. The heating wire rod accommodation space 49 can be a closed space by closing both ends of the substantially C-shaped channel member. That is, it can be configured to prevent cold air from entering the freezing/refrigerating warehouse 21.

As the heating wire 29, for example, a self-temperature control type PTC (Positive Temperature Coefficient) heater can be used. The electric resistance value of the PTC heater changes with a positive coefficient as the temperature rises. As a result, an appropriate temperature can be controlled by itself without the need for an external controller such as a sensor. The heating wire 29 can be used in the form of a film heater or a ribbon heater.

Further, the opening/closing body device 11 has a three-way frame 51 in the opening 23. The three-sided frame 51 includes a pair of left and right vertical frames 53 and an upper horizontal frame 55 sandwiched between the pair of vertical frames 53. The vertical frame 53 is fixed to the heat insulating walls 35 on the left and right of the opening 23, and the guide rails 17 are attached thereto. The horizontal frame 55 may double as the above-mentioned lintel, and is attached to the lower edge of the upper wall 31 or the edge portion of the curtain entrance/exit portion 33. The pair of vertical frames 53 and the horizontal frame 55 are connected in a gate shape (see FIG. 1).

A decorative frame 57 made of wood or the like is attached to the heat insulating wall 35 along the edge of the opening 23 in a gate shape. The three-sided frame 51 is fixed to the heat insulating wall 35 by a fixing bolt 59 penetrating the decorative frame 57 and the heat insulating wall 35.

Each of the vertical frame 53 and the horizontal frame 55 forming the three-way frame 51 is provided with the same heating wire 29 as the above along the extending direction of each member. The guide rail 17 is fixed to the vertical frame 53. The guide rail 17 includes the inner rail 39 and the outer rail 37 as described above. As shown in FIG. 3, two heating wires 29 can be provided on the outer rail 37 and the vertical frame 53. That is, a total of four heating wire rods 29 can be installed by the left and right guide rails 17 and the vertical frames 53.

The heating wire 29 provided on the vertical frame 53 is arranged close to the head of the fixing bolt 59. As a result, in the heating wire 29, the fixing bolt 59 has a low temperature, and condensation and freezing that occur outside the heat insulating wall 35 are prevented. The heating wire 29 provided on the outer rail 37 prevents dew condensation and freezing on the outer rail 37 outside the shutter curtain approaching the outside air temperature when the heat insulating door 61 is opened. The heating wire 29 provided on the outer rail 37 prevents the inner rail 39 from freezing when the heat insulating door 61 is closed, and prevents the movement of the shutter curtain 19 from being hindered. Further, as shown in FIG. 2, the heating wire 29 provided on the horizontal frame 55 warms the curtain entrance/exit portion 33. As a result, the heating wire 29 of the horizontal frame 55 prevents dew condensation at the curtain entrance/exit portion and freezing after the dew condensation, and prevents the shutter curtain 19 from being opened or closed. That is, the heating wire 29 can heat the fixing bolt 59, the inner rail 39, the curtain entrance/exit portion 33, and other members in contact with or close to each other to 0° C. or more.

These electric heating wires 29 are wired to the junction box 63 inside the refrigerating and refrigerating warehouse 21, and further wired to the external control panel 65 to be connected to a power source such as a commercial power source.

Next, the operation of the above configuration will be described.
In the opening/closing body device 11 according to the present embodiment, in the state where the shutter curtain 19 closes the opening 23, the flap 27 provided on the base end side of the shutter curtain 19 in the payout direction extends along the winding shaft 15 at the contact portion. Touch 25. Since the flap 27 bulges like a bag from the shutter curtain 19, it comes into surface contact with the contact portion 25. As a result, the gap between the shutter curtain 19 and the upper wall 31 is closed by the flap 27 and the contact portion 25 over the entire length of the winding shaft 15.

The flap 27 has flexibility by being made of a synthetic resin material or the like. A heating wire 29 is provided on the contact portion 25 of the flap 27 in contact with the heating wire 29. The heating wire 29 heats the contact portion 25 and the flap 27 at a low temperature of about −30° C. so that the flap 27 becomes at least 0° C. or higher.

When the inside of the opening/closing body device 11 is arranged in a refrigerating warehouse or the like which is used at a low temperature of about −30° C., for example, the opening/closing body device 11 is arranged inside the heat insulating door 61 and is closed, that is, unrolled from the winding shaft 15. There is a lot of time when That is, since the flap 27 remains closed, the flap 27 becomes low in temperature and hardens. It may also freeze. If this freezing continues for a long time, or if a frozen mass grows and grows from the dew condensation state, it becomes difficult to remove it. However, since the heating wire 29 has a temperature at which dew condensation and freezing do not occur, the flap 27 maintains flexibility and the effect of blocking the gap is not lost. That is, the flexibility of the flap 27 is not impaired even at a low temperature of about −30° C., and the flap 27 is flexible and adheres to the contact portion 25 over the entire width direction of the shutter curtain 19. As a result, the gap between the shutter curtain 19 and the upper wall 31 is closed.

Further, the contact portion 25 also becomes 0° C. or higher due to the heating of the heating wire 29. Therefore, the flap 27 can be prevented from sticking to the contact portion 25 due to freezing, and can be prevented from being damaged when the shutter curtain 19 is wound. Further, since the flap 27 maintains its flexibility, the flap 27 can be easily bent when the shutter curtain 19 is wound, so that the winding of the shutter curtain 19 can be prevented from being hindered.

Further, in the opening/closing body device 11, since the contact portion 25 is made of a metal material, the heat from the heating wire 29 is uniformly transferred to the entire contact portion 25 due to good thermal conductivity. Since the contact portion 25 has the entire length in the width direction of the shutter curtain 19, it is possible to warm the entire width direction of the flap 27.

The heating wire 29 is fixed to the side of the plate-shaped contact portion 25 opposite to the surface side of the flap 27 in contact. The heat from the heating wire 29 is once transferred to the contact portion 25 and then transferred to the flap 27 from the outer surface, which is the opposite surface, by heat conduction. Therefore, in the contact portion 25, the volume corresponding to the plate thickness of the metal acts as a heat capacity body, so-called heat sink, and the surface temperature becomes uniform, and the heat is transferred to the flap 27. As a result, the flap 27 can be stably prevented from freezing, that is, can be kept warm.

Further, in the opening/closing body apparatus 11, the contact portion 25 has the heating wire rod accommodation space 49 on the side opposite to the surface side of the flap 27 in contact. This heating wire accommodation space 49 is closed. That is, the heating wire rod 29 is arranged in the closed heating wire rod accommodation space 49. The heating wire 29 is in contact with the air in the heating wire accommodation space 49, except for the portion in contact with the surface of the contact portion 25.

The heating wire 29 is insulated by the air in the closed space except for the contact portion with the contact portion 25, and has a large convective heat resistance. Therefore, the heating wire 29 has a higher heat generation efficiency than that in the case where the heating wire 29 is directly exposed to the inside atmosphere of the freezing/refrigerating warehouse 21 and arranged. The heat from the heating wire 29 is transferred to the contact portion 25 by heat conduction and passes through the heat. As a result, the heating wire 29 has a large temperature gradient with less power consumption than when it is directly exposed to the atmosphere in the refrigerator, and it is possible to efficiently transfer heat to the flap 27. As a result, the heating efficiency of the contact portion 25 can be improved.

Therefore, according to the opening/closing body apparatus 11 according to the present embodiment, by providing the contact portion 25 provided with the heating wire 29, the flap 27 that comes into contact with the contact portion 25 is prevented from freezing, and thus the gap closing function of the flap 27 is achieved. It is possible to prevent the deterioration and to improve the airtightness of the shutter curtain 19.

11... Opening/closing unit device 15... Winding shaft 17... Guide rail 19... Opening/closing unit (shutter curtain)
21... Freezing/Refrigerating Warehouse 23... Opening 25... Contact 27... Gap Closure Member (Flap)
29... Electric heating wire 43... Edge part 49... Electric heating wire accommodation space

Claims (8)

A pair of parallel guide rails fixed to the left and right edges sandwiching the upper edge of the inside of the opening of the warehouse guides the edges on both sides in the width direction, and opens and closes the opening inside the heat insulating door. Body and
A winding shaft that is rotatably arranged along the upper edge part and that winds and unwinds the opening/closing body,
A contact portion provided on the inner surface of the refrigerator along the winding shaft above the upper edge portion,
A flexible gap provided on the opening/closing body along the winding shaft at the base end side of the opening/closing body with the opening closed, and extending from the opening/closing body to come into contact with the contact portion. A closure member,
A heating wire that is provided along the gap closing member in the contact portion and heats at least the gap closing member to 0° C. or more;
An opening/closing body device comprising: The opening/closing device according to claim 1,
The guide rail includes an outer rail and an inner rail attached to the inner side of the outer rail, and the opening/closing body is guided by the inner rail.
A heating wire is provided on the outer rail along the extending direction of the opening/closing body that closes the opening, in the same direction as the one side surface on the upper edge portion side where the contact portion is provided. An opening/closing body device characterized by being provided . The opening/closing device according to claim 2,
The outer rail is fixed to a heat insulating wall forming left and right edges of the opening, and the heating wire provided on the outer rail is arranged close to a heat insulating wall side of the outer rail. Body device. The opening/closing body device according to claim 2 or 3,
The said outer rail is being fixed to the said heat insulation wall via the vertical frame, The said vertical frame is provided with the heating wire which follows the heating wire provided in the said outer rail, The opening/closing body apparatus characterized by the above-mentioned. The opening/closing body apparatus according to any one of claims 2 to 4,
The opening/closing body apparatus, wherein the vertical frame is fixed by a fixing bolt penetrating the heat insulating wall, and the heating wire provided on the vertical frame is arranged in the vicinity of a head of the fixing bolt. The opening/closing body apparatus according to any one of claims 2 to 5,
The pair of left and right vertical frames and the horizontal frame located at the upper part between the pair of vertical frames constitute a three-sided frame of the opening, and the horizontal frame is provided with a heating wire. An opening and closing body device. The opening/closing body apparatus according to any one of claims 1 to 6 ,
The contact portion is made of a metal material, has at least the entire length in the width direction of the opening/closing body along the upper edge portion, and the heating wire is fixed via a plate portion in contact with the gap closing member. An opening and closing body device. The opening/closing device according to claim 7 ,
The contact portion has a heating wire rod accommodation space that is closed on the side opposite to the contact surface side of the gap closing member, and the heating wire rod is fixed in the heating wire rod accommodation space and fixed to the upper edge portion. An opening/closing body device characterized by being.

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