JP3357905B2 - Automatic door escape device for freezer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an escape device for an automatic door for a freezer, and more particularly to a device for driving a wrapping transmission member when a person is trapped in the freezer due to a failure of a driving device or the like. The present invention relates to an escape device in which a door can be opened by an operation.

[0002]

2. Description of the Related Art An automatic door for a freezer has a structure in which a door is connected to a wrapping transmission member such as a chain driven by a driving device, and a touch switch or the like is operated from both the outside and inside of the refrigerator. In this case, the door is automatically opened and closed by activating the drive unit.However, if the door cannot be automatically opened and closed due to the lock of the drive unit while the worker is in the warehouse, , The worker is locked in the refrigerator. In this case, if the operator manually opens the door, the door can be escaped from the refrigerator. However, since the door is connected to a driving device via a wrapping transmission member, the door is not connected. It is extremely difficult to open manually.

In order to deal with such a problem, for example, according to Japanese Patent Application Laid-Open No. 2-71081, as shown in FIG. A rod 102 to be attached is fixed, and a locking member 103 is fixed to an upper end of the rod 102.
3 discloses a configuration of an escape device in which an engagement fitting 104 to be disengaged is fixed to a winding transmission member 105 formed of a chain (FIG. 1 shows the basic configuration of the publication). According to this escape device, when the worker is trapped in the refrigerator as described above, the locking fitting 103 is disengaged from the engaging fitting 104 by operating the manual lever 101 to move the rod 102 downward. As a result, the door 100 can be manually opened without being affected by the self-holding force of the driving device.

[0004]

However, in the above-mentioned conventional escape device, the door body 100 is exposed with the rod 102 exposed.
Because it is held on the inner surface of the refrigerator, it is directly exposed to the cold air in the refrigerator, and the frost attached to the rod 102 becomes water droplets, causing rust or freezing over a long period of time,
There is a problem that the rod 102 does not move down and cannot escape when the worker is trapped in the refrigerator.

[0005] Further, the above-mentioned conventional one has a winding transmission member 10.
5, the engagement fitting 104 is directly fixed, so that there is a danger that sliding may occur between the engagement fitting 104 and the locking fitting 103 due to the effect of the vertical micro-vibration generated in the winding transmission member 105 during driving. As a result, there is a problem that uneven wear and the like occur between the two, and they cannot withstand long-term use.

[0006]

SUMMARY OF THE INVENTION The present invention is characterized in that the following problems are solved in order to solve the above problems. That is, the door is opened and closed by the driving force transmitted from the winding transmission member driven by the driving device to the door via the engagement / disengagement mechanism in the engaged state, and the door is opened and closed by operation from inside the refrigerator. In the escape device for an automatic door for a freezer configured to cut off the transmission path of the driving force from the winding transmission member to the door body by setting the removal mechanism to the detached state, the engagement / disengagement mechanism may be attached to the winding transmission member. Fixed slide block
And fixed to the connection bracket fixed above the door body
Slide movement in the door opening / closing direction on the upper surface of the
Fixed so as to be is restricted to only, of the slide block
A locking body which is locked at an upper movement position in an engagement hole of a perforated body fixed to a lower surface , detached at a lower movement position, and urged upward by a spring member and held vertically by a connecting bracket. In addition, a flexible strip that connects an operation member operable from the inside of the freezer of the door body and the locking body is penetrated through the inside of the door body.

[0007]

According to the above-mentioned means, at the time of normal automatic opening and closing, the locking body which is held by the connecting bracket so as to be vertically movable,
The urging force of the spring member is locked in the engaging hole of the perforated body fixed to the lower surface of the slide block at the upper moving position, and therefore, the driving force applied to the winding transmission member from the driving device is: A slide block to which a winding transmission member is fixed ,
It is transmitted to the connection bracket and the door via the perforated body and the locking body. In this case, the slide block is held by the rail member fixed to the connection bracket so as to be movable only in the door opening and closing direction, and the locking body is also held by the connection bracket. , The vertical relative positional relationship between the slide block and the locking member does not change. On the other hand, if the drive device breaks down when the operator enters the freezer and the door is closed, the operator manually operates the operating member from the inside of the freezer of the door, and the flexible member is moved. The body is pulled, the locking body moves down, and is released from the slide block. In such a state, if the door body is manually opened, the wrapping transmission member and the slide block are maintained at a fixed position by the self-holding force of the driving device.
The rail member and the connection bracket move in the door opening direction together with the door body. In this case, since the flexible strip is penetrated through the inside of the door, the flexible strip is not directly exposed to the cold air in the freezer, and frost adheres. Will not occur.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an automatic door escape device for a freezer according to the present invention. As shown in FIGS. 1 and 2, the freezer automatic door 1 has a wrapping transmission member 3 driven by a door engine 2. The wrapping transmission member 3 in this embodiment has a sprocket 4 is a wire 3b wound around the pulley 5, while the chain 3a is wound around the pulley 5. In addition, the hanging brackets 6, 6 fixed above both ends of the door body 5 include:
The door rollers 7, 7 are rotatably mounted, and the door rollers 7, 7 are rotatably supported on a guide rail 8 extending linearly in the door opening and closing direction.

An escape device 10 provided in the freezer automatic door 1 is provided with a coupling mechanism 11 attached to a connection bracket 11 fixed above a central portion of the door body 5. As shown in FIG. 3 and FIG.
The rail member 14 is provided on the upper surface of the
The slide block 15 is held on the upper surface of the rail member 14 so as to be movable in the door opening and closing direction, and can be disengaged from the engaging hole 17 of the perforated body 16 fixed to the lower surface of the slide block 15. The locking rod 18 is vertically urged upward by a spring member 19 and held by the base material 13 so as to be vertically movable. The upper end of the spring member 19 is in contact with a ring member 19a, and the upward movement of the ring member 19a is regulated by a pin 19b inserted into the locking rod 18. And
One end of the chain 3a of the wrapping transmission member 3 is fixed to one end protruding portion 15a of the slide block 15, and bolts 15b projecting from the upper surface of the slide block 15 are formed.
One end of a wire 3b of the wrapping transmission member 3 is wound around b, and is fixed from above by using a pressing plate 15c and nuts 15d... 15d.

Further, as shown in FIG. 2, a flexible strip 20 made of a wire or the like is attached to a lower end of the locking rod 18, and the flexible strip 20 is provided with a guide roller. 20a… 20
It is penetrated through the inside of the door body 5 while being bent and guided by a and the like, and the lower end thereof is connected to the operation member 21. The operation member 21 is housed inside the door body 5 and can be manually operated from the freezer A side.
For example, any material that can pull the flexible strip 20 such as a lever or a handle may be used.

On the upper surface of the guide rail 8, concave portions 8a into which door wheels 7, 7 are fitted when the door body 5 is in the fully closed position are provided.
8a is formed (see FIG. 6), and when the opening operation of the door body 5 is started, the rod 23a of the electric cylinder 23 shown in FIG. Care has been taken to ensure that the opening operation is performed smoothly.

According to the above configuration, the automatic door 1
At the time of the normal opening and closing operation, by operating the touch switch or the like to start the door engine 2, the winding transmission member 3 is driven, and the driving force is transmitted from the slide block 15 to the engagement and disengagement mechanism 12. The door 5 is automatically opened / closed. At this time, even if a slight vertical vibration occurs in the winding transmission member 3, the slide block 15 to which the winding transmission member 3 is fixed does not move up and down relatively to the connection bracket 11. The perforated body 16 and the locking rod 18 fixed to the fin do not move up and down relatively.

On the other hand, if the door body 5 is closed after the worker enters the freezer and the door engine 2 locks thereafter and the automatic opening operation is stopped, the lock of the door engine 2 is transmitted by winding. The member 3 remains closed while acting on the connecting bracket 11 and the door body 5 via the locking rod 18. In such a case, the operator manually operates the operation member 21 from the inside of the freezer A and pulls the flexible strip 20, so that the locking rod 18 is attached to the spring member 19 as shown in FIG. It moves downward against the force and comes off the engaging hole 17 of the perforated body 16. In such a state, the operator manually operates the door 5.
6, the wrapping transmission member 3 and the slide block 15 maintain the same state by the self-holding force of the door engine 2 as shown in FIG. The member 13 and the rail member 14 move in the opening direction together with the door 5 without being affected by the lock of the door engine 2.

In this case, when the door body 5 is at the fully closed position, the door wheels 7, 7 are fitted into the concave portions 8a, 8a of the guide rail 8, but the concave portions 8a, 8a are manually operated as described above. The opening 5 is formed to a depth that does not cause any trouble when the door 5 is opened. Therefore, the worker can easily move out of the refrigerator by opening the door body 5 with a light force. Thereafter, if the malfunction of the door engine 2 is repaired and returned to the initial state, the automatic opening / closing operation is performed.
Next, even if the period until the escape device 10 is operated is long as described above, since the flexible strip 20 is passed through the inside of the door 5, The strip 20 is not exposed to the cold air in the freezer, so that the attachment of frost and the generation of rust due to the frost are prevented, and adverse effects such as inoperability of the escape device 10 are avoided.

[0015]

As described above, according to the automatic door escaper for a freezer according to the present invention, when a failure such as a lock of a drive device occurs while an operator is in the freezer, the door is opened. By manually operating the operation member from the inside of the freezer of the body, the flexible strip was pulled, the locking body was moved down, and was detached from the engagement hole of the perforated body fixed to the lower surface of the slide block. In this state, the driving force transmission path from the winding transmission member to the connecting bracket is cut off, and the door can be manually opened with a small force without being affected by the failed driving device. And since the said flexible strip is penetrated through the inside of a door body, this flexible strip is not directly exposed to the cold air in a freezer, therefore, this flexible strip is not exposed. Adhesion of frost to the body and the occurrence of a door due to this are prevented, adverse effects such as operation failure do not occur, and the locking member and the operating member are connected by using a flexible strip, The installation location of the operation member can be freely selected irrespective of the position of the locking body, and the layout is not restricted. Further, the slide block is held by a rail member fixed to the connection bracket, and the locking body is also held by the connection bracket. There is no change in the vertical relative positional relationship with the locking body, whereby uneven wear or the like occurring between the two is reduced, and durability is improved.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a main part showing an overall configuration of an automatic door for a freezer according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a main part showing a schematic configuration of an escape device provided in the freezer automatic door.

FIG. 3 is a perspective view showing a configuration of an engaging and disengaging mechanism in the escape device.

FIG. 4 is a vertical sectional side view cut along the line XX in FIG. 3;

FIG. 5 is a vertical sectional side view of an essential part showing the operation of the embodiment.

FIG. 6 is a schematic front view of an essential part showing the operation of the embodiment.

FIG. 7 is a schematic front view of a main part showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic door for freezers 2 Drive device (door engine) 3 Wound transmission member 3a Wound transmission member (chain) 3b Wound transmission member (wire) 5 Door body 10 Escape device 11 Connection bracket 12 Disengagement mechanism 14 Rail member 15 Slide block 18 Locking body (locking bar) 19 Spring member 20 Flexible strip

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F25D 23/02 306

Claims (1)

(57) [Claims] An opening / closing operation is performed by transmitting a driving force from a winding transmission member driven by a driving device to a door via an engagement / disengagement mechanism in an engaged state, whereby the door is opened and closed, and operation from inside the refrigerator is performed. in escape apparatus freezer for automatic doors constructed as cut off the transmission path of driving force to the door body from the wrapping transmission member by the detached state the engaging mechanism by, the engaging mechanism, said wrapping Slide fixed to transmission member
The block is slid in the door opening and closing direction on the upper surface of the rail member fixed to the connection bracket fixed above the door body.
The slide block is fixed so as to be restricted only by the movement of the slide block, and is locked at the upward movement position in the engagement hole of the perforated body fixed to the lower surface of the slide block , is separated at the downward movement position, and is urged upward by the spring member. The holding member is held by the connecting bracket so as to be vertically movable, and a flexible strip connecting the operating member operable from inside the freezer of the door body and the holding member is provided inside the door body. An escape device for an automatic door for a freezer, wherein the escape device penetrates and penetrates.