JPH046477Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is particularly suitable for automatic applications such as warehouse entrances where cargo handling machines enter and exit, partitions in food and chemical factories, and even preliminary entrances to refrigerators. Regarding door opening/closing devices.

[Conventional technology]

As insulated automatic doors for entrances and exits in areas where people and cargo handling machines such as forklifts frequently enter and exit, especially when the indoor side is colder than the outdoor side, the so-called flexible door and the fourth door are used as shown in Figure 3. The strip curtain door shown in the figure is used.

In the former, see-through swing doors a, a' made of synthetic resin, which is a heat insulating material, are attached to known auto-return rotating shafts b, b' that have built-in spring coils, etc.
The swing doors a and a', which are normally closed as shown by the solid line in Fig. 4, are pushed open as shown by the imaginary line by the operation of a cargo handling machine A such as a forklift, and the swing doors a and a' are opened on the outdoor side B'. When the vehicle passes through the indoor side B, the swing doors a and a' are automatically closed by the auto-return rotation shafts b and b'.

However, when using the flexible door, the cargo handling machine will hit the transparent swing doors a and a' at approximately the same location, so the door made of vinyl chloride etc. will be scraped from both sides, resulting in a cut. Not only is it easy to damage and tear if a cut is made, resulting in a very short service life, but when passing through the doorway, the cargo handling machine travels while receiving force in the direction of door closing from the auto-return rotation axes b and b'. Moreover, this force prevents the cargo handling machine A from going straight and causes it to make an undesired turn.For this reason, the door a, which can only be opened by about 90 degrees,
An external force may be applied to door a' that forces it to open further, causing the doors a and a' to split or damaging the auto-return rotation shafts b and b' themselves, rendering them unusable. It also happens.

Furthermore, as mentioned above, the doors a and a' are made of a transparent material, since there is a risk of collision if entry and exit from both sides cannot be confirmed. Not only will the front and back surfaces be damaged by cargo handling machine A, but the grease from the machine A will also adhere to them, impeding their transparency and making it impossible to see through them, which will quickly reduce safety, and this will cause damage to passersby. This disadvantage is particularly noticeable in food factories, as it stains the clothes of people who use the equipment.Furthermore, relatively light loads loaded onto cargo handling machine A while passing through can be easily removed from the transparent swing doors a and a'. Due to contact during approach, Aircraft A
In addition, even though insulation materials are used, they are in direct contact with the outdoor air, which has a large effect on the indoor temperature.

Next, as shown in Fig. 4, the strip curtain door described above has hanging sheets d, d', d'' made of synthetic resin suspended from a horizontal vertical rod c in an overlapping state. Although it has a very simple structure, cargo handling machine A will be in constant contact with the curtain door when approaching, so there is a possibility that oil from a forklift etc. may get on it or it may get scratched. In this case as well, transparency is rapidly impaired by scratches and blackening, making it impossible to maintain safety.

In addition, in the case of the curtain door that comes into contact with the cargo handling machine A as described above, the hanging seals d, d', d''... are in the final stage of passage, as understood from a and b in Fig. 6. This can lead to accidents such as hitting the operator in the face and bruising his eyes.Not only can lightweight cargo fall off as in the conventional example, but also the room B' is at a low temperature. If this is the case, a large amount of water droplets will form on the surface of the outdoor B side of the curtain door, wetting the clothes of passersby, and if the indoor side is a refrigerator, ice and snow will adhere to the outdoor side. The transparency will be reduced to zero, and the hanging sheets d, d', d''... will move greatly in the wind, which will cause a defect that will greatly impede the insulation effect between indoors and outdoors. be.

Although not shown, it has already been proposed or implemented for a long time to form an air curtain at the entrance in order to block this type of entrance. When there is a temperature difference between indoors and outdoors, the warm air ejected to form the air curtain flows into the room, causing the low temperature inside the room to rise unintentionally.

[Problem that the invention attempts to solve]

In view of the above-mentioned points, this invention separates the inner auto-return insulated swing door and the outer sliding door of the electric door automatic opening/closing device, which open and close in relation to each other, between the indoor side and the outdoor side. A preliminary passage chamber is defined between the two doors, and the above-mentioned flexible It eliminates damage and stains on insulated doors, which are defects of doors and strip curtain doors, dramatically improving safety and durability, and also solving the problem of getting wet and dirty for passersby and operators. This not only eliminates the resistance that prevents the cargo handling machine from moving, but also makes it easier to control the indoor temperature by minimizing the amount of warm air entering the room, not only when the cargo handling machine enters and exits, but also when the door is closed.
The first objective is to eliminate the occurrence of ice forming on coolers installed indoors, resulting in insufficient ventilation.

Furthermore, in the present invention, as described above, both the outer sliding door and the inner auto-return insulating swing door that is closed by the outer sliding door can rotate and protrude toward each room from both the outdoor doorway and the indoor doorway when opening and closing. The second purpose is to prevent each door from colliding with a cargo handling machine, etc., no matter which entrance or exit the cargo handling machine, etc. enters from. It is.

[Means for solving problems]

In order to achieve the above object, the present invention installs an outside sliding door of an electric door automatic opening/closing device, which is opened and closed by an outdoor side detection switch and an indoor side detection switch, respectively, at the outdoor side entrance so that it can be pulled horizontally. At the same time, an inner auto-return insulating swing door defining a preliminary passage chamber between the outer sliding door and the inner door is located at the indoor entrance and is pivotally provided at one or both ends thereof, and is connected to the outer sliding door and the inner side. The auto-return insulated swing door is an opening operation by horizontally pulling the outer sliding door using the electric automatic door opening/closing device, which pulls the inner auto-return insulated swing door and swings the door open toward the preliminary passage room side. The present invention aims to provide an automatic door opening/closing device connected by a towing cable mechanism.

[Effect]

When a cargo handling machine or a passerby enters or exits the room, the outdoor side detection switch or indoor side detection switch detects this, and as is known, the electric door automatic opening/closing device operates, and the outside sliding door opens. It will be pulled sideways and open, and during this opening,
The inner auto-return insulated swing door, which is connected to this by a towing cable mechanism, is opened by following it toward the preliminary passage chamber, so that the object cannot enter the room or the outdoors through the preliminary passage chamber. Once the entry is completed, the outer sliding door closes as is also known, but at this time, the inner auto-return insulated swing door automatically closes due to its own restoring force to the closed state. ,
Both doors will return to their original closed state.

〔Example〕

To describe the present invention in detail with reference to the drawings, as shown in FIGS. 1 and 2, an indoor side entrance 2 is provided between an indoor side B and an outdoor side B' which are partitioned by a partition wall 1. A preliminary passage chamber 4 is defined, and the indoor side entrance 2 is provided with an inner auto-return heat insulating swing door 5 of the same quality as the above-mentioned flexible door, and the outdoor side entrance 3 is provided with a chamber as well known in the art. An electric door automatic opening/closing device operated by an inner side detection switch 6 or an outdoor side detection switch 6' is provided with an outer door 7, respectively.

Here, the inner auto-return heat insulating swing door 5 is made of a synthetic resin door body 5 as is known.
A is connected to a rotating shaft 5b in which a return spring (not shown) for automatic door closing is built in. In the example shown in Fig. 1, there is one single door, and in Fig. 2, there is a double door type with two doors. are shown.

Next, regarding the above-mentioned outer sliding door 7, it is sufficient to install an electric door automatic opening/closing device which is also widely used at present. Therefore, an indoor side detection switch 6 such as a pine switch or a heat wire switch or an outdoor side detection switch can be installed. When 6' detects a passing object, the automatic opening/closing device is started, and in FIG. In FIG. 2, the double-swinging outer sliding doors 7, 7 are opened by horizontally pulling to the left and right, respectively.

In the present invention, between the outer sliding door 7 and the inner auto-return insulation swing door 5 arranged as described above, in order to interlock the two,
The tow rope mechanism 8 is connected thereto.

In the embodiments shown in FIGS. 1 and 2, the tow rope mechanism 8 includes a tow rope 8a, a compensating spring 8b, and two pulleys 8c, 8c', and in the case of FIG. There is only one.

That is, after the tow cable 8a connected to one end of the outer sliding door 7 is routed around a pulley 8c' fixed to the partition wall 1 on the side of the outdoor entrance 3, it is passed through the inner auto-return heat insulating swing door 5 for preliminary passage. The cable 8a is connected to a pulley 8c provided on the side of the room 4, and the cable 8a is connected to the door body 5a via a compensating spring 8b.

Therefore, in the above embodiment, when the cargo handling machine etc. enters the room or leaves the room, the outdoor side detection switch 6' and the indoor side detection switch 6 detect this, and the electric door automatic opening/closing device is activated. As a result of the operation, the outer sliding door 7 slides open by horizontal pulling, and the inner auto-return heat-insulating swing door 5 connected to the outer sliding door 7 by the towing cable mechanism 8 opens in the preliminary passage chamber. The door is opened interlockingly to the 4 side, and the state changes from state a to state b in FIGS. 1 and 2.

At this time, the compensation spring 8b of the tow rope mechanism 8
When the door changes from the closed state to the open state,
This is to compensate for the insufficient length when the length of the tow rope 8a is insufficient.

When both doors 5 and 7 are opened as described above, the cargo handling machine enters and exits the interior and exterior of the room via the preliminary passage chamber 4, and when the loading and unloading machine finishes entering and exiting, the electric door automatic opening/closing device is activated. Due to the operation, the outer sliding door 7 moves backward, and the inner auto-return heat insulating swing door 5 also closes by its own restoring force.

[Effect of idea]

Since the present invention is constructed as described above, forklifts, trolleys, passersby, etc.
Since there is no direct contact with the inner auto-return insulated swing door made of synthetic resin, there is no damage or dirt, and its durability is greatly improved.
Passersby will not get dirty with grease or the like, and the door will no longer be required to have such strength, so its wall thickness can be made thinner.

In addition, when the outer sliding door is opened, the inner auto-return insulated swing door will also be opened, but since the entry of outside air is controlled according to the degree of opening and closing of the outer sliding door, it is less involuntary than the conventional one. The inflow of warm air into the room and the loss of cool air indoors are reduced.

In addition, the indoor side is insulated against outside air not only by the inner auto-return insulation swing door but also by the outer door via the preliminary passage chamber, so not only when the door is open but also when the door is closed. The entrance of outside air and the influence of outside temperature are significantly suppressed compared to conventional ones, and it is possible to provide an extremely superior insulation effect.

Furthermore, according to the present invention, the outer sliding door is opened by pulling it horizontally, so even when entering from the outdoor entrance, the outer sliding door will not be hit by a forklift, etc. Even if you wait until you are close to the door, there will be no unwanted trouble.

In addition, the inner auto-return insulated swing door also opens toward the preliminary passage room and does not rotate toward the indoor side, so when attempting to enter from the indoor entrance, it does not work as well as the above-mentioned outer sliding door. They will receive similar benefits.

[Brief explanation of the drawing]

1 and 2 show different embodiments of the automatic door opening/closing device according to the present invention, a and b in each figure are cross-sectional plane explanatory views in the closed door state and the door open state, respectively, and FIG. 3 is a conventional automatic door opening/closing device. Fig. 4 is a perspective view of the strip curtain door, and Fig. 5 a and b show a cargo handling machine passing through the strip curtain. FIG. 4 is an explanatory side view of the initial stage and the middle stage, respectively, showing the state. 2...Indoor doorway, 3...Outdoor doorway, 4
...Preliminary passage chamber, 5...Inner auto-return insulation swing door, 6...Indoor side detection switch, 6'
...Outdoor side detection switch, 7...Outside sliding door, 8...Tow cable mechanism, 8a...Tow cable, 8b...
...Compensation spring, 8c, 8c'...Pulley,
B...Indoor side, B'...Outdoor side.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An outside sliding door of an electric automatic door opening/closing device that is opened and closed by an outdoor detection switch and an indoor detection switch, respectively, is provided at the outdoor entrance so that it can be pulled horizontally, and , an inner auto-return insulating swing door defining a preliminary passage chamber between the outer sliding door and the inner auto-return insulating swing door is located at the indoor entrance and exit, and is pivotably provided at one or both ends thereof;
The above-mentioned outer sliding door and inner auto-return insulated swing door are operated by the electric door automatic opening/closing device that pulls the outer sliding door horizontally to pull the inner auto-return insulated swing door to the side of the preliminary passage room. An automatic door opening/closing device connected by a tow cable mechanism that rotates to open the door. (2) The scope of the utility model registration claim, in which the tow rope mechanism connecting the outer sliding door and the inner auto-return insulated swing door is composed of a tow rope, a compensation spring, and a pulley for rotating the tow rope. The automatic door opening/closing device described in paragraph 1.