JPH0513252Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an automatic door opening/closing device for a show case, which is particularly useful when the user of the show case has something in his hand and cannot use it freely. ,
Moreover, it relates to an automatic door opening/closing device for show cases that saves energy and labor.

Furthermore, the present invention relates to an automatic door opening/closing device for a show case, which is designed to store the door of a show case in a narrow space and in a place that is difficult for people to see, thereby making the storage area of the show case as wide as possible. It is.

[Prior art]

Self-service restaurants have been considered due to rising labor costs. In addition, because it has become difficult to demand sophisticated and reliable service from employees at restaurants and supermarkets, it is becoming increasingly difficult to require employees to provide high-quality, reliable service. It's getting more and more.

The self-service show case is a case box for displaying and storing products, and has a transparent door that opens and closes. The user carries luggage, a basket, or a tray in both hands, selects products among the cases, and takes out the desired product.

Since users often have their hands occupied, it is convenient if the door of this type of show case is constructed so that it opens and closes automatically, rather than having to be operated by the user individually.

The structure of an automatic door is such that when a user stands in front of the show case, a proximity switch or foot switch is activated, which activates the door drive circuit and automatically opens the door.

On the other hand, for example, many of the foods supplied in restaurants need to be kept warm or refrigerated, so product display and storage boxes that also serve as storage cases are
A cold storage box equipped with a heat retention or refrigeration device (hereinafter referred to as
In this specification, a cold storage is one equipped with a heat insulation or refrigeration device.

Therefore, an automatic door is required to have a structure that opens quickly in response to a user's request and closes quickly and safely as soon as the product is removed to maintain the cold state.

As a specific conventional example, for example,
In the door opening/closing device described in Publication No. 98980, a sensor is actuated by the proximity of a user, and the automatic door is opened upward while winding a cable attached to one end of the automatic door onto a drum.

[The problem that the idea aims to solve]

However, the automatic door of the show case like the one above,
There was a problem that it took up a lot of space to store, and the sound of winding the cable or drum was noisy.

That is, the storage section of the automatic door of the show case needs to have the following conditions: it does not get in the way for the user to take out products, it looks good, and it does not reduce the space efficiency of the show case as much as possible.

In addition, automatic doors for show cases must not surprise or cause discomfort to users when they open and close, and must be safe, reliable, and simple.

Furthermore, when an automatic door is provided that opens in the front-rear direction when viewed from the user, there is a problem in that when one automatic door is opened, the opposite automatic door closes.

Furthermore, in a show case having a semicircular cross section, when the door is opened and closed along the attic, the ceiling part and the automatic door part need to be constructed alternately. Therefore, these alternating parts not only look bad, but also pose a risk of getting your hands caught in these parts.

In order to solve the above-mentioned problems, this invention has an automatic door that is stored along the ceiling of the show case to make the show case smaller, and an easy-to-use automatic door for the show case that can display as many items as possible. The purpose is to provide a switchgear.

[Means to solve the problem]

In order to achieve the above object, the automatic door opening/closing device of the present invention includes a product display storage section, a cold storage, an automatic door, an automatic door storage section, and an automatic door opening/closing drive device. One end is rotatably fixed to a drive shaft on the side of the show case, and the other end is rotatably fixed to a rotating shaft provided at the top end of the automatic door. A driving member having a link mechanism between its ends, and a driven member having one end fixed to a rotating shaft located near the driving shaft and the other end fixed to a rotating shaft provided at the lower end of the automatic door. It consists of

The automatic door opening/closing device for a show case is configured such that the automatic door and the ceiling of the show case have a semi-cylindrical shape.

The automatic door in the automatic door opening/closing device of the show case has an inclined surface, and the ceiling of the show case is
It is configured to have a horizontal surface.

An automatic door in an automatic door opening/closing device for a show case is configured with doors on the left and right sides when viewed from the center of a drive shaft of a driving member and a driven member.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on FIGS. 1 and 2.

FIG. 1 is a schematic cross-sectional view of one embodiment of the present invention, in which the right side of the drawing is the front part of the show case, and the left side is the rear part of the show case, which is the part that contacts the wall of the room.

FIG. 2 is a schematic cross-sectional view of another embodiment of the present invention, in which the automatic door and the ceiling of the show case are semi-cylindrical, and the automatic door can be opened and closed to the left and right as shown in the figure.

In FIG. 1, the entire cross section of the show case 10 is shown. Showcase 10 is
The product display/storage section 12, the automatic door 14 inclined on one side, the automatic door/storage section 16 along the back of the ceiling 29 consisting of the horizontal surface of the product display/storage section 12, and the product display/storage section 12 are kept warm or cooled. Cold storage 1
8 and an automatic door opening/closing drive device 20 that opens and closes the automatic door 14.

The automatic door opening/closing drive device 20 is driven by a drive device (not shown), and includes a drive member 22 arranged on the side surface of the show case 10 and a drive member 2 .
2, and a driven member 26 that is driven in accordance with the drive of step 2.

The drive member 22 has one end rotatably fixed to the drive shaft 23, and the other end to the automatic door 1.
4, and a drive member 22b rotatably fixed to a rotation shaft 24 provided at the upper end of the drive member 22b.

The drive member 22a and the drive member 22b are rotatably connected to each other by a link 25.

Further, the automatic door opening/closing drive device 20 is provided on the side when the user views the automatic door 14 from the front.

The driven member 26 is rotatably fixed at one end to a rotation shaft 27 disposed near the drive shaft 23 and at the other end to a rotation shaft 28 provided at the lower end of the automatic door 14 .

The automatic door 14 is housed along the back side of the ceiling 29 of the show case 10, and the lower part thereof becomes the product display/storage section 12.

The operation of the embodiment shown in FIG. 1 will be explained.

In Figure 1, automatic door 1 drawn with a solid line
4. The driving member 22 and the driven member 26 show the state in which the automatic door 14 is closed, and the automatic door 14 is drawn with a dotted line, and the driving member 22 and the driven member 26 are shown with a dotted line. The state in which the automatic door 14 starts to move and opens is shown.

When the automatic door 14 is closed, the driving members 22a and 22b are opened approximately 120 degrees. In this state, when a user approaches and the proximity switch is activated, or when the user presses the foot switch, a drive device (not shown) is activated and the drive member 22 moves around the drive shaft 23 as shown in the figure. Start rotating counterclockwise. At this time, driving member 2
The angle of the second link 25 is narrower than when the automatic door 14 is closed. That is, the inclined automatic door 14 is rotated counterclockwise while being lowered.

On the other hand, the driven member 26 pushes the lower end of the automatic door 14 upward as the automatic door 14 rotates counterclockwise. Then, the angle of the link 25 is bent to approximately 90 degrees, and the drive member 2
2. The automatic door 14 is made almost horizontal by the link 25 and the driven member 26, and is stored in the automatic door storage section 16 along the back side of the ceiling 29 of the show case 10.

The lengths of the driving member 22 and the driven member 26 are designed so that the automatic door 14 does not come into contact with the ceiling 29.

Moreover, such an automatic door opening/closing drive device 20,
It can be installed not only on one side of the show case but also on both sides and operated simultaneously.

As described above, in the automatic door opening/closing drive device 20, the link 25 is bent when the drive member 22 rotates, so that the straight distance from the drive shaft 23 to the rotation shaft 24 is shortened. That is, even if the ceiling 29 of the show case 10 is lowered, the automatic door 14 is
It is stored in an automatic door storage section 16 along the back side of the.

The trajectory of the automatic door 14 entering the automatic door storage section 16 along the back side of the ceiling 29 is circular due to the bending by the link 25 of the drive member 22 and the distance between the drive shaft 23 and the rotation shaft 27. do not become.

That is, the length of the drive member 22, the position of the link 25, the length of the driven member 26, and the distance between the drive shaft 23 and the rotation shaft 27 are determined by computer simulation so that the trajectory of the automatic door 14 is uniform. It is designed so that it can be rotated compactly and stored behind the ceiling 29.

A second embodiment will be described based on FIG.

The second embodiment has a semi-cylindrical automatic door 14 and a ceiling 2.
This embodiment has a product display/storage section 12 of a show case consisting of 9 and 9, and the other configurations are the same as those of the first embodiment.

Therefore, while referring to FIG.
The operation of the embodiment will be explained.

First, when a user approaches, a drive circuit (not shown) is activated, and the drive member 22 begins to rotate inward. The inward movement of the drive member 22a pinches the angle of the link 25 and pushes down the automatic door 14 inward. The driven member 26 then pushes up the lower end of the automatic door 14. When the drive member 22 further rotates inward from this state, the automatic door 14 is stored in the automatic opening/closing door storage section 16 along the back side of the ceiling 29 of the product display storage section 12.

As shown in FIG. 2, the show case has a semicircular cross section, and the ceiling 29 can also have a semicircular cross section with the same curvature. In other words, when the automatic door 14 of the show case is closed, the automatic door 14 and the ceiling 2
The surface of the connecting portion with 9 can be made flush.

In this way, when the automatic door 14 of the show case is made flush with the surface of the connecting portion with the ceiling 29, the automatic door 14 and the ceiling 29 come into contact with each other at the beginning of the rotation of the automatic door 14 and do not open. However, since the link 25 of the driving member 22 is bent due to rotation, the second
As shown by dotted lines in the figure, the automatic doors 14 are staggered and housed along the back side of the ceiling 29 of the case.

Although the automatic doors 14 are provided on the left and right sides of FIG. 2, they may be provided on only one side.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments, and various design changes can be made without departing from the present invention described in the claims of the utility model registration. It is possible to do this.

[Effect of idea]

According to the present invention, the link part is bent by the rotation of the drive member, so even if the ceiling of the show case is low, the automatic door can be stored in the automatic door storage section along the back of the ceiling.

In addition, automatic doors open and close using a drive member that is bent on one side by a link mechanism, and a driven member that has a rotation axis located near the rotation axis of the drive member. Do not draw a circular trajectory centered on the axis. In other words, the trajectory when the automatic door opens and closes has a compact shape that roughly follows the ceiling of the show case.

Furthermore, if the ceiling of the show case is made to have a semicircular cross section, the surfaces of the automatic door and the ceiling will be flush, resulting in an excellent design in terms of appearance.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a show case having an automatic door inclined in one direction, and FIG. 2 is a schematic cross-sectional view of a show case having an automatic door formed of semi-cylinders in both directions. 10...Show case automatic door opening/closing device, 12
...Product display storage section, 14...Automatic door, 16...
Automatic door storage unit, 20...Automatic door opening/closing drive device, 2
2...Driving member, 26...Following member, 29...Ceiling of the show case.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An automatic door opening/closing device for a show case consisting of a product display storage section 12, a cold storage 18, an automatic door 14, an automatic door storage section 16, and an automatic door opening/closing drive device 20. , there is an automatic door storage section 16 along the back side of the ceiling 29 of the product display storage section 12, and one end is attached to the drive shaft 23 on the side of the show case.
Rotation shaft 2 whose other end is provided at the upper end of automatic door 14
4, each drive member 2 is rotatably fixed to the drive member 2 and has a link mechanism between the one end and the other end.
2; and a driven member 26, one end of which is fixed to a rotation shaft 27 disposed near the drive shaft 23, and the other end fixed to a rotation shaft 28 provided at the lower end of the automatic door 14. An automatic door opening/closing device for a show case. (2) The automatic door 14 and the ceiling 2 of the show case
Reference numeral 9 refers to the automatic door opening/closing device for a show case as set forth in claim 1 of the utility model registration, characterized in that the shape is semi-cylindrical. (3) The automatic door opening/closing device for a show case according to claim 1, wherein the automatic door 14 has an inclined surface, and the ceiling 29 of the show case has a horizontal surface. (4) The automatic door 14 is configured with doors on the left and right sides when viewed from the center of the drive shaft 23 of the drive member 22 and the driven member 26. The automatic door opening/closing device for the show case described in item 3.