JPH09184677A - Door device for low temperature show case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door device capable of improving a closing characteristic of an opening part of a low temperature show case having a sliding type door. SOLUTION: There are provided rail frames 2, 3 positioned above and below a front opening of a storing chamber and also having each of forward and rearward two rails 11, 12, 21, 21 and 22; two door members 4, 6 spaced apart from each other and movably arranged at each of the upper and lower rails; a seal member 31 arranged at at least one side 4C of the sides 4C, 6C of each of the door members 4, 6 overlapped to each other in a forward or a rearward direction under a state in which each of the door members 4, 6 is closed, and projected at the side of the other door member 6; and guiding members 32, 32 abutted against each of the door members 4, 6 when it is closed and for guiding each of the door members 4, 6 in such a way that each of the sides 4C, 6C approaches to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low temperature showcase door device in which a front opening of a storage chamber is closed by a sliding door.

[0002]

2. Description of the Related Art Conventionally, in a low-temperature showcase,
For example, Japanese Utility Model Publication No. 4-20941 (E05D15 / 0)
As shown in 6), two front and rear doors are fitted into rail frames mounted above and below the front opening of the storage chamber (inside the storage), and these doors are moved left and right to open and close the opening.

The structure of the conventional door device 101 of the low temperature showcase will be described with reference to FIG. The door device 101 is
The upper and lower rail frames 102, 1 are attached to the front opening edge of the heat insulating box of the low temperature showcase (not shown).
03 and two front and rear door bodies 104 and 106 fitted between the rail frames 102 and 103.

The upper rail frame 102 has front and rear walls 107, 1 extending in the left-right direction, protruding downward from each other at a predetermined interval.
08 and a central wall 109, two front and rear tracks 111, 112 are formed between the front wall 107 and the central wall 109, and between the central wall 109 and the rear wall 108.

The lower rail frame 103 projects upwards at a predetermined distance from each other and extends in the left-right direction.
3, 114 and a central wall 116, and between the front wall 113 and the central wall 116, and between the central wall 116 and the rear wall 114, the front and rear orbital bodies 117 and 118 that cross the left and right, respectively.
Is attached. Each of the raceways 117, 118 is made of a steel plate having a substantially M-shaped cross section, and the front raceway 117 is inclined to the right, for example, and the rear raceway 118 is gradually inclined to the left toward the left. doing. Then, in the M-shaped troughs of each orbital body 117, 118, the two front and rear orbits 1
21 and 122 are configured.

Each of the doors 104 and 106 has a frame-shaped sash 123 around it, a transparent plate glass 124 fitted in the sash 123, and the lower sides 104A and 106A of the doors 104 and 106 attached to the left and right sides of the sash 123. And rollers 126, 126 that are attached to each other.

The upper side 104 of the doors 104 and 106
The sash 123 of B and 106B is inserted into the front and rear tracks 111 and 112 of the upper rail frame 102, and the rollers 126 and 1
26 to the orbits 121 and 122 of the orbital bodies 117 and 118.
The door body 104 is slidably abutted on the front side between the vertical rails 111 and 121 on the front side, and the door body 106 is mounted between the vertical rails 112 and 122 on the rear side so as to be movable in the horizontal direction. The opening is opened and closed by the lateral movement of the doors 104 and 106.

A space is formed between the door members 104 and 106 to ensure their movement, and the track members 117 and 118 are inclined to the right or left so that they are at the front side. The door body 104 is always located on the right side, and the rear door body 106 is always located on the left side, and exhibits a self-closing function.

With the doors 104 and 106 closed as described above, the sash 123 on the left side 104C of the door 104 and the sash 123 on the right side 106C of the door 106 overlap each other in the front-rear direction. Then, the sash 1 on the left side 104C of the door body 104
A brush-like sealing material 131 is provided on the rear surface of the door body 106.
It is attached to the top and bottom so as to project to the side (rear). The sealing material 131 is located between the upper and lower rail frames 102 and 103, and has sides 104C and 106C of the door bodies 104 and 106.
It is provided to close the space between them.

[0010]

However, as described above, a space is formed between the front and rear door bodies 104 and 106 to facilitate their movement, and the door body 104,
Even when 106 is closed, the sealing material 131 does not reach the door body 106, and a gap is left between the sides 104C and 106C. Then, as the cool air inside flows out from this gap and the outside air enters, the cooling capacity decreases and
There was a problem that frost and condensation also increased.

The present invention has been made to solve the above-mentioned conventional technical problems, and provides a door device capable of improving the closing property of the opening of a low temperature showcase provided with a sliding door type door. The purpose is to

[0012]

A door device according to a first aspect of the present invention is applied to a low temperature showcase in which a front opening of a storage chamber is openably and closably closed by a sliding door, and is positioned above and below the opening. However, the rail frame has two tracks on the front and rear, two doors that are spaced apart from each other and are movably installed on the upper and lower tracks, respectively. Sealing member provided on at least one of the overlapping sides of the door body and protruding to the other door body side, and abutting against each other when each door body is closed, and each door body so that the respective sides are close to each other. And a guide member for guiding.

According to the first aspect of the present invention, a guide member is provided which abuts each of the door members when the door members are closed and guides the door members so that the sides of the front and rear door members are close to each other. Therefore, it is possible to bring the sealing material close to the other door body or press it against the other door body in a state where each door body is closed.
Therefore, it is possible to effectively narrow or close the gap between the mutually overlapping sides of the door body, and effectively reduce or prevent leakage of cold air from the storage chamber or invasion of outside air into the storage chamber. You will be able to do that.

A door device according to a second aspect of the present invention is applied to a low temperature showcase in which a front opening of a storage chamber is closed by a sliding door so that it can be opened and closed. A rail frame with a track, two door bodies that are spaced apart from each other and are movably provided on each of the upper and lower tracks, and the sides of the door bodies that overlap each other in the closed state. And a sealing material which is provided on at least one of the above and protrudes toward the other door side, and the front and rear tracks of the lower rail frame are brought close to each other at the center portion in the left and right direction.

According to the second aspect of the present invention, since the front and rear tracks of the lower rail frame are brought close to each other in the central portion in the left-right direction, a gap is formed between the door bodies during movement. When each door is closed while smoothing the movement, the sides that overlap the front and rear of each door are brought closer to each other by being guided by the track. Therefore, it is possible to bring the sealing material close to the other door body or press it against the other door body with each door body closed, so that the gap between the mutually overlapping sides of the door body is effectively narrowed, or It becomes possible to block the leakage of the cool air from the storage chamber or the invasion of the outside air into the storage chamber, which can be effectively reduced or prevented.

In particular, since the front and rear tracks of the lower rail frame on which the rollers normally slide are close to each other, the movement of the door body is not hindered.

A door device according to a third aspect of the present invention is applied to a low temperature showcase in which a front opening of a storage chamber is openably and closably closed by a sliding door, which is located above and below the opening and has two front and rear rows. A rail frame with a track, two door bodies that are spaced apart from each other and are movably provided on each of the upper and lower tracks, and the sides of the door bodies that overlap each other in the closed state. Of at least one of the above, the sealing material protruding toward the other door side, the magnetic body which is the central portion in the left-right direction of the upper rail frame, and which is attached between the front and rear tracks, and the sides of each side face each other. And a magnetic body that is attached to the surface and that is detachably attached to the magnetic body when each door is closed.

According to the third aspect of the present invention, a magnetic material is attached to the central portion of the upper rail frame in the left-right direction between the front and rear tracks, and the door bodies overlap each other in the closed state. Since the magnetic bodies which are detachably attached to the magnetic body when the doors are closed are provided on the surfaces of the respective sides facing each other, the sealing material in the state where the door bodies are closed by the attraction of the magnetic bodies. Can be brought close to or pressed against the other door body. Therefore, it is possible to effectively narrow or close the gap between the mutually overlapping sides of the door body, and effectively reduce or prevent leakage of cold air from the storage chamber or invasion of outside air into the storage chamber. You will be able to do that.

In particular, since the magnetic bodies are removably attracted to each other, there is no hindrance to the movement of the door body, and since the magnetic body is attached to the upper rail frame, the cold air leaks from the upper portion of the door body and the outside air enters. Can be effectively prevented.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a perspective view of a low temperature showcase S as an embodiment to which the present invention is applied, FIG. 2 is a vertical side view of an upper portion of the low temperature showcase S, and FIG. 3 is a vertical side view of a door device 1 of the present invention.

The low temperature showcase S is composed of a heat insulating box 42 having an opening on the front surface.
Is an outer box 43 made of a steel plate that opens to the front, an inner box 44 made of a steel plate or a hard resin that is open to the front and is installed in the outer box 43 at a distance, and the outer box 43 and the inner box 4
Door device 1 of the present invention, which serves as a breaker for connecting the opening edges of 4
Upper and lower rail frames 2 and 3 and left and right frames (not shown) made of hard synthetic resin, which form the outer box 43, the inner box 44, and the respective frames 2 and 3.
It is composed of a heat insulating material 45 made of polyurethane foam, which is filled in the space surrounded by and by the in-situ foaming method.

A storage chamber 60 is constructed in the inner box 44, and a front opening 61 of the storage chamber 60 can be freely opened and closed by sliding door type doors 4 and 6 fitted in the upper and lower rail frames 2 and 3. Is blocked by. In addition, a cooler of a cooling device (not shown) is provided in the storage chamber 60, and a blower 62 is installed at the upper portion. The cool air from the cooler is forcedly circulated by the blower 62 to allow the inside of the storage chamber 60 to be cooled. Is cooled to a predetermined temperature. In addition, a plurality of net shelves 65 for displaying products are erected in the storage room 60, and the heat insulating box 42 is provided.
A shade 63 is attached to the left and right at the upper end of the front surface of the, and a fluorescent lamp 64 for illumination is built in the shade 63.

On the other hand, the door device 1 includes the upper and lower rail frames 2,
3 and the two front and rear door bodies 4 and 6 fitted between the rail frames 2 and 3. The upper rail frame 2 is
Front and rear walls 7 and 8 and a central wall 9 which project downward at a predetermined interval from each other and extend left and right are provided between the front wall 7 and the central wall 9, and between the central wall 9 and the rear wall 8. In addition, two front and rear orbits 11 and 12 extending to the left and right are respectively configured.

The lower rail frame 3 protrudes upward at a predetermined interval from each other and extends in the left-right direction.
And a central wall 16 between the front wall 13 and the central wall 16,
Further, between the center wall 16 and the rear wall 14, front and rear orbital bodies 17 and 18 are attached to the left and right, respectively. Each orbital body 17, 18 is made of a steel plate having a substantially M-shaped cross section, and the orbital body 17 on the front side is inclined toward the right side, and the orbital body 18 on the rear side is gradually inclined toward the left side. doing. And, two orbital tracks 21 and 22 are formed in the M-shaped troughs of the track bodies 17 and 18, respectively.

Each of the door bodies 4 and 6 is attached to the surrounding frame-shaped sash 23, the transparent plate glass 24 fitted in the sash 23, and the left and right sides of the sash 23 of the lower sides 4A and 6A of the door bodies 4 and 6. And the rollers 26, 26 which are attached to each other.

Then, the sashes 23 on the upper sides 4B and 6B of the door bodies 4 and 6 are inserted into the front and rear tracks 11 and 12 of the upper rail frame 2, and the rollers 26 and 26 are moved to the tracks 21 and 21 of the track bodies 17 and 18, respectively. By slidably abutting on 22
The door body 4 is mounted between the upper and lower tracks 11 and 21 on the front side, and the door body 6 is mounted between the upper and lower tracks 12 and 22 on the rear side so as to be movable in the left-right direction. The opening 61 of the storage chamber 60 is opened and closed by the lateral movement of the door bodies 4 and 6.

Further, a space is formed between the door bodies 4 and 6 to secure their movement, and the track body 17,
Since 18 is inclined low to the right or left, the front door body 4 is always located on the right side, and the rear door body 6 is always located on the left side to exhibit a self-closing function. .

With the doors 4 and 6 closed as described above,
The sash 23 on the left side 4C of the door body 4 and the sash 23 on the right side 6C of the door body 6 overlap front and back. And the left side 4 of the door body 4
On the rear surface of the C sash 23, a brush-like sealing material 31 is attached to the top and bottom of the door 6 so as to protrude toward the door body 6 (rearward). The sealing material 31 is located between the upper and lower rail frames 2 and 3 and is for closing the space between the sides 4C and 6C of the door bodies 4 and 6.

Here, the front wall 7 and the rear wall 8 of the upper rail frame 2
A guide member 32 formed of a metal fitting having a spring property is attached to each inner surface of the central portion in the left-right direction. The guide member 32 is in the shape of a substantially triangular prism having an inclined surface in the left-right direction, and extends in a substantially front and rear range of the front wall 7 and the rear wall 8 and projects inward.

When the door bodies 4 and 6 are closed, the upper sides 4B and 6B of the door bodies 4 and 6 are guided to the guide members 32 and 32.
Since they are slidably abutted against each other and pressed so as to be close to each other, the sides 4C and 6 of the door bodies 4 and 6 which overlap the front and rear sides.
C's are also close to each other. Therefore, the sealing material 31 attached to the side 4C is brought closer to the opposite side 6C or pressed against the side 6C as shown in FIGS. 3 and 4, so that the distance between the sides 4C and 6C is reduced. Or, it can be closed.

Next, FIGS. 5 to 7 show another structure of the door device 1 of the present invention. The other structure is the same as that of FIGS. 1 to 4, and thus the description thereof is omitted. In this case, the two front and rear tracks 21, 22 formed in the M-shaped troughs of the track bodies 17, 18 of the lower rail frame 3 have adjacent portions 21A, 22A that smoothly approach each other at the center in the left-right direction. Is configured.

According to this structure, a space is formed between the doors 4 and 6 during the movement as shown in FIG. 6 so that the doors 4 and 6 can be moved smoothly. On the other hand, when the doors 4 and 6 are closed, Orbit 2
The side portions 4C and 6C of the door bodies 4 and 6 are brought close to each other as shown in FIG. Therefore, the sealing material 31 can be brought close to the side 6C or pressed against the side 6C with the doors 4 and 6 closed, so that the gap between the sides 4A and 6A of the doors 4 and 6 can be reduced. It is possible to effectively narrow or block the cold air, and it is possible to effectively reduce or prevent leakage of cold air from the storage chamber 60 or invasion of outside air into the storage chamber 60.
Especially, the front and rear tracks 2 of the lower rail frame 3 on which the rollers 26 slide.
Since 1 and 22 are brought close to each other, there is no hindrance to the movement of the door bodies 4 and 6.

Next, FIGS. 8 to 9 show still another structure of the door device 1 of the present invention. The other structure is shown in FIG.
The description is omitted because it is similar to FIG. 7. in this case,
The front and rear surfaces of the central portion of the center wall 9 of the upper rail frame 2 in the left-right direction have magnetic bodies 33, 33 made of magnets or iron plates.
Is attached. In addition, the magnetic bodies 34, 3 made of magnets are formed on the rear surface of the upper side 4B of each door body 4 (the upper end of the side 4C) and on the rear side of the upper side 6B of the door body 6 (the upper end of the side 6C).
4 are attached respectively.

Then, when the door bodies 4 and 6 are closed, the magnetic bodies 34 and 34 of the door bodies 4 and 6 are removably adsorbed to the magnetic bodies 33 and 33 of the upper rail frame 2, so that FIG. As described above, the sides 4C and 6C overlapping the front and rear of the door bodies 4 and 6 are also close to each other.
Therefore, the sealing material 31 attached to the side 4C comes close to the opposite side 6C or is pressed against the side 6C as shown in each figure, so that the interval between the sides 4C and 6C is narrowed, or You can close it. In particular, since the magnetic members 33 and 34 are attracted to each other in a detachable manner, the door members 4 and 6 are
There is no hindrance to the movement of the above, and since the magnetic body 33 is attached to the upper rail frame 2, it is possible to effectively prevent cold air leakage and outside air invasion from the upper portions of the door bodies 4 and 6.

[0035]

As described above in detail, according to the invention of claim 1, when the doors are closed, the doors come into contact with each other, and the sides of the doors that overlap each other in the front and rear are close to each other. Since the guide member for guiding is provided, it is possible to bring the sealing material close to the other door body or press it against the other door body with each door body closed. Therefore, it is possible to effectively narrow or close the gap between the mutually overlapping sides of the door body, and effectively reduce or prevent leakage of cold air from the storage chamber or invasion of outside air into the storage chamber. You will be able to do that.

Further, according to the invention of claim 2, since the front and rear tracks of the lower rail frame are brought close to each other in the central portion in the left-right direction, there is an interval between them during the movement of the door bodies. When each door body is closed while forming and smoothing the movement, the sides that overlap the front and rear sides of each door body are guided close to each other. Therefore, it is possible to bring the sealing material close to the other door body or press it against the other door body with each door body closed, so that the gap between the mutually overlapping sides of the door body is effectively narrowed, or It becomes possible to block the leakage of the cool air from the storage chamber or the invasion of the outside air into the storage chamber, which can be effectively reduced or prevented.

In particular, since the front and rear tracks of the lower rail frame on which the rollers normally slide are brought close to each other, there is no hindrance to the movement of the door body.

Further, according to the third aspect of the invention, a magnetic body is attached to the center portion of the upper rail frame in the left-right direction between the front and rear tracks, and the front and rear doors are overlapped with each other in a closed state. Since the magnetic bodies that are detachably attached to the magnetic bodies when the doors are closed are provided on the mutually facing surfaces of the sides of the door body,
By attracting the magnetic members together, it becomes possible to bring the sealing material close to the other door body or press it against the other door body with each door body closed. Therefore, it is possible to effectively narrow or close the gap between the mutually overlapping sides of the door body, and effectively reduce or prevent the leakage of cold air from the storage chamber or the invasion of outside air into the storage chamber. You will be able to do that.

In particular, since the magnetic bodies are removably attracted to each other, there is no hindrance to the movement of the door body, and since the magnetic body is attached to the upper rail frame, the cold air leaks from the upper portion of the door body and the outside air enters. Can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a low temperature showcase as an embodiment to which the present invention is applied.

2 is a vertical sectional side view of an upper portion of the low temperature showcase shown in FIG. 1. FIG.

FIG. 3 is a vertical sectional side view of the door device of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a plan view of a lower rail frame of another door device according to the present invention.

6 is a view corresponding to a cross section taken along line BB of FIG. 3 of the door device in the case of FIG.

FIG. 7 is a view corresponding to FIG. 6 with the door closed.

FIG. 8 is a vertical sectional side view of still another door device of the present invention.

FIG. 9 is a sectional view taken along the line CC of FIG. 8;

FIG. 10 is a vertical cross-sectional side view of a conventional door device for a low temperature showcase.

[Explanation of symbols]

 S Low-temperature showcase 1 Door device 2 Upper rail frame 3 Lower rail frame 4, 6 Door body 11, 12, 21, 22 Tracks 21A, 22A Proximity portion 26 Roller 31 Seal material 32 Guide member 33, 34 Magnetic body 60 Storage chamber 61 Opening

Claims (3)

[Claims] 1. A low-temperature showcase in which a front opening of a storage chamber is closed by a sliding door so as to be openable and closable, and rail frames which are located above and below the opening and have two front and rear tracks, respectively. Provided on at least one of the sides of the door bodies which are spaced apart and movably provided on the respective upper and lower orbits, and the front and rear door bodies which overlap each other in the closed state of the respective door bodies, and the other A low temperature characterized by comprising a seal member protruding toward the door body and a guide member that abuts each of the door bodies when the door bodies are closed and guides the door bodies so that the sides are close to each other. Door device for showcase. 2. A low temperature showcase in which a front opening of a storage chamber is closed by a sliding door so as to be openable and closable, and rail frames which are located above and below the opening and have two front and rear tracks, respectively. Provided on at least one of the sides of the door bodies which are spaced apart and movably provided on the respective upper and lower orbits, and the front and rear door bodies which overlap each other in the closed state of the respective door bodies, and the other A door device for a low-temperature showcase, comprising: a sealing material that protrudes toward a door body; and the front and rear tracks of the lower rail frame that are close to each other at the center in the left-right direction. 3. A low temperature showcase in which a front opening of a storage chamber is openably and closably closed by a sliding door, and rail frames which are located above and below the opening and have two front and rear tracks, respectively. Provided on at least one of the sides of the door bodies which are spaced apart and movably provided on the respective upper and lower orbits, and the front and rear door bodies which overlap each other in the closed state of the respective door bodies, and the other The sealing material protruding toward the door body, the central portion in the left-right direction of the upper rail frame, the magnetic body attached between the front and rear tracks, and the magnetic material attached to the mutually opposing surfaces of the respective sides, A door device for a low-temperature showcase, comprising a magnetic body that is detachably attached to the magnetic body when the door is closed.