JP2006037652A - Lock handle device for door with internal unlocking mechanism - Google Patents

Abstract

When an operation handle is pulled out and rotated from the outside of a cabinet, a latch member is driven to an unlocked position, and the door is unlocked from the cabinet, while a fixed base guide hole fixed to the back side of the door The inner push bar is inserted into a receiving hole penetrating the door forward and backward, and the latch member is driven to the unlocking position by pushing the inner push bar from the inner side. In the door lock handle device with mechanism, avoid freezing and fixing the inner push rod.
A sealing member 7 made of a heat insulating material is mounted in a space between an inner surface of a receiving hole 9 formed in a door 3 and an outer surface of an inner push rod 1, and the inner surface of the sealing member 7 The inner push bar 1 is brought into close contact with the outer surface of the inner push bar 1 so that the inner push bar 1 can slide.
[Selection] Figure 1

Description

The present invention relates to a door lock handle device with an internal unlocking mechanism used for a door of a walk-in type commercial large-sized freezer or the like.

The lock main body of the door lock handle device is fixed to the front side of the door, and an operation handle operated from the outside of the cabinet is pivotally attached to the fixed main body by a transverse pivot, and is a latch that is engaged with and disengaged from a metal receiver fixed to the cabinet side When a member is mounted on the fixed main body and the operation handle is pulled out and rotated, the latch member is driven to the unlocked position, and the door is unlocked with respect to the box (see, for example, Patent Document 1).

In a large commercial freezer, because the storage items are organized and carried in and out while the refrigerator is in operation, the latch member is unlocked from the inside assuming that the worker is trapped in the warehouse by mistake. An internal unlocking mechanism for driving to a position is provided (see, for example, Patent Document 1 and Patent Document 2).

This inner side unlocking mechanism is composed of a fixed base fixed to the back side of the door, and an inner side push rod inserted through a guide hole of the fixed base and a receiving hole penetrating in the front-rear direction of the door. The latched member is driven to the unlocked position via an appropriate mediating member when the trapped worker pushes the inner push rod, and the worker can immediately escape by himself / herself ( Patent Document 2).

However, in a freezer with a large temperature difference between the inside and the outside of the warehouse, the moisture in the outside air that has entered the gap between the inner surface of the receiving hole of the door and the outer surface of the inner push bar touches the cold inside the warehouse and freezes. When the inner push bar is fixed to the door, a situation occurs in which the worker cannot push the inner push bar when it is really necessary.

In order to avoid such freezing and fixing of the inner push rod, an inner unlocking mechanism having a built-in heating heater has already been proposed (see, for example, Patent Document 2 and Patent Document 3). There is a corresponding increase in the cost of parts, and there is a complicated installation work that requires special wiring for power supply. Furthermore, the wiring and heater wires are broken due to vibration shock that occurs when the door is opened and closed. There was also a problem that extra maintenance cost was required.

Japanese Patent No. 2797276 Japanese Utility Model Publication No. 56-5987 JP-A-8-193781

An object of the present invention is to provide a door lock handle device having an internal unlocking mechanism that can reduce parts and member costs, has no complicated installation work, and does not require extra maintenance costs.

The main feature of the present invention is that the operation handle is pivotally attached to the fixed main body fixed to the front side of the door by a transverse pivot, and the latch member that engages and disengages the receiving member fixed to the cabinet side is fixed to the fixed main body. When the operation handle is pulled out and rotated from the outside of the cabinet, the latch member is driven to the unlocked position, and the door is unlocked to the cabinet, while the door is fixed to the back side of the door. The inner push rod is inserted into the guide hole of the base and the receiving hole penetrating the door forward and backward, and the latch member is driven to the unlocked position by pushing the inner push rod from the inner side. In the lock handle device for doors with the inner unlocking mechanism,
A sealing member made of a heat insulating material is mounted in a space between the inner surface of the receiving hole formed in the door and the outer surface of the inner push bar, and the inner surface of the sealing member and the outer surface of the inner push rod are That is, the inner push bar is brought into close contact so as to be slidable.

In the present invention, a sealing member made of a heat insulating material is mounted in a space between the inner surface of the receiving hole formed in the door and the outer surface of the inner push bar, and the inner surface of the sealing member and the inner push rod The outer surface is in close contact with the inner push bar so that the inner push bar can slide, so that wet outside air enters between the inner surface of the sealing member and the outer surface of the inner push bar and contacts the cold inner air. There is nothing to do. Since the freezing phenomenon of the inner push bar can be surely prevented, the door can be released from the inner side by pressing the inner push bar immediately as necessary, and can be opened.

In this way, the freezing prevention of the inner push bar is not the heating by the built-in heater but the heat insulation by the sealing member and the prevention of contact between the inside and outside air, so that the cost of parts and members is reduced unlike the case of using the built-in heater. be able to. Further, since troublesome wiring work can be eliminated, there is no complexity in the mounting work. Furthermore, since there is no fear of disconnection of wiring and heater wires, no extra maintenance costs are incurred.

It is desirable that each part of the door lock handle device, the fixed base of the internal unlocking mechanism, and the internal push bar are made of a metal material to be rigid against mechanical impact.
The sealing member can be composed of a rigid body or a hard material as long as the inner surface of the sealing member and the outer surface of the inner push rod are in close contact with each other. Usually, a synthetic rubber material or plastic foamed into a sponge shape is used. Composed of materials.

In the illustrated embodiment, the inner push bar 1 is formed of a metal bar having a cross-shaped cross section, and a hand pad 2 is connected to the inner end thereof. The fixed base 4 fixed to the back side of the door 3 is formed with a cross-shaped guide hole 5 at the center. A compression coil spring 6 is inserted between the guide cylinder portion 4a of the fixed base 4 and the pad body 2 to urge the inner push rod 1 back to the standby position. The compression coil spring 6 is an inner push rod. 1 is fitted.

The sealing member 7 is made of a sponge-like foamed plastic body. As shown in FIG. 2, the cross section of the foamed plastic body formed in a circular cross section has a cross-section with the same cross section as the inner push rod 1. A through-hole 8 is formed. The foamed plastic body is a long member, and is used by cutting it to a suitable length with a cutter knife corresponding to the actual thickness of the door 3. The sealing member 7 thus obtained is mounted by being pushed into a circular receiving hole 9 formed through the door 3 in the front-rear direction.

The sealing member 7 is pushed in such a manner that the outer surface thereof is in close contact with the inner surface of the receiving hole 9, whereby the contact state between the inner surface of the sealing member 7 and the outer surface of the inner push rod 1 is more reliably maintained. It has become so. The sealing member 7 is closely packed over the entire length of the receiving hole 9.

The structure of the door lock handle device 10 is not limited to that shown in the figure, and a conventionally known one can be appropriately employed.
In the structure shown in the figure, the fixed main body 11 is fixed to the front side of the door 3, and the receiver 12 is fixed to the front of the edge portion of the cabinet 13. The operation handle 14 is pivotally attached to the fixed main body 11 by a transverse pivot 20, and a latch member 15 mounted on the fixed main body 11 so as to advance and retreat in parallel with the front surface of the door 3 slides in a protruding direction by a compression coil spring 16. It is energized.
The outer end of the inner push rod 1 is inserted into the through hole 18 of the substrate 17 of the fixed body 11.

A drive lever 21 and a release lever 22 are pivotally attached to the operation handle 14 by a pivot 20. The passive end 23 of the release lever 22 is disposed on the front side of the through hole 18 of the substrate 17. An interlocking blade 24 that can contact the interlocking end 25 of the drive lever 21 protrudes from the passive end 23. The drive end portion 26 of the drive lever 21 is engaged with the passive portion 19 of the latch member 15.

A base end portion of the lock lever 27 is pivotally attached to an intermediate portion of the latch member 15 by a pivot 28, and a flat surface portion 30 capable of abutting against a spring receiving plate portion 29 projecting from the base plate 17 is a base end of the lock lever 27. It is formed on the side of the part. A flank 31 that does not contact the spring receiving plate 28 is formed on the rear surface of the base end of the lock lever 27. A receiving recess 33 is formed at the distal end of the lock lever 27 and engages with a lock rod 32 as an external lock. A passive pin 35 with which the driving end 34 of the release lever 22 abuts is provided in the middle of the lock lever 27.

In this door lock handle device, when the grip portion of the operation handle 14 is pulled forward in FIG. 1 and the operation handle 14 is rotated counterclockwise about the pivot 20, the operation end 36 of the operation handle 14 is obtained. Pushes the drive end 34 of the release lever 22, so that the release lever 22 rotates counterclockwise about the pivot 20, and the drive end 34 pushes the passive pin 35 to the back side. As a result, the lock lever 27 rotates in the clockwise direction around the pivot 28, and the flank 31 on the rear surface of the base end rotates without contact with the spring receiving plate 29.

When the rotation operation of the operation handle 14 further continues, the drive lever 21 rotates counterclockwise about the pivot 20, and the passive end 19 of the latch member 15 is pulled to the right by the drive end 26. When the latch member 15 fully slides against the bias of the spring 16, the tip of the latch member 15 is detached from the metal receiver 12, and the lock of the door 3 with respect to the box 13 is released, and the door 3 Is opened by further pulling the operating handle 14.

When the operation handle 14 is released, the latch member 15 protrudes from the left side wall portion 37 of the fixed main body 11 by the action of the spring 16, and in conjunction with this, the operation handle 14 rotates backward about the pivot 20, It automatically returns to the position of. When the door 3 is closed and rotated, the arcuate back surface 38 at the front end of the latch member 15 comes into contact with the metal receiver 12, so that the latch member 15 automatically slides back slightly. At this time, the tip receiving recess 33 of the lock lever 27 moves integrally with the latch member 15 so as to cross a part of the through hole 39 in the side wall surface portion of the fixed main body 11.

The latch member 15 advances and slides by the bias of the spring 16 at the moment when the front end portion of the latch member 15 passes the front end portion of the metal receiver 12 to the back side, and is deeply engaged with the back surface side of the metal receiver 12. As a result, the door 3 is locked to the cabinet 13 again. When the door 3 is locked in earnest after the end of business, the lock rod 32 such as a padlock is inserted into the through hole 39 of the fixed body 11 and the through hole 41 of the rising wall portion 40 of the substrate 17. In this state where the lock bar 32 is inserted, when the operation handle 14 is to be rotated in the unlocking direction, the operation end portion 36 of the operation handle 14 abuts against the side surface of the lock bar 32, so that the operation handle 14 Rotation operation is impossible.

When the door 3 is accidentally closed and locked from outside during work in the freezer, the trapped worker presses the inner push rod 1 inserted through the receiving hole 9 of the door 3 and the through hole 18 of the substrate 17. Good. As a result, the passive end portion 23 of the release lever 22 is pushed forward, so that the release lever 22 rotates counterclockwise about the pivot 20. Due to this rotation, the driving end 34 of the release lever 22 pushes the passive pin 35 of the lock lever 27, so that the lock lever 27 is rotated in a direction to detach from the lock rod 32 and the restraint of the latch member 15 is released. .

When the inner push rod 1 is further pressed, the passive end portion 23 of the release lever 22 pushes the passive end portion 25 of the drive lever 21 by the blade 24, so that the drive lever 21 is latched by the drive end portion 26 and the latch member 15. The passive portion 19 is pulled to the right, and the latch member 15 is slid backward in the unlocking direction.
Therefore, by further pushing the inner push bar 1, the door 3 can be opened from the inner side even in the locked state where the lock bar 32 is inserted through the previous through holes 39, 41. You can escape.

It is a center longitudinal cross-sectional view of the mounting state of the lock handle apparatus for doors with a warehouse inner side unlocking mechanism which concerns on one Example of this invention, and the door is in the state locked in the closed position. It is a perspective view of the sealing member integrated in the warehouse inner side unlocking mechanism of FIG. It is a principal part cross-sectional view of the inner side unlocking mechanism of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner side push rod of inner side unlocking mechanism 2 Pad body of inner side push rod 3 Door 4 Fixing base of inner side unlocking mechanism 5 Guide hole 6 Compression coil spring for return of inner side unlocking mechanism 7 Sealing member 8 Through hole 9 Receiving hole 10 Lock handle device for door 11 Fixed main body 12 Receiving 13 Housing 14 Operation handle 15 Latch member 16 Spring for returning latch member 17 Fixed body substrate 18 Substrate through hole 20 Transverse axis 21 Drive lever 22 Release lever 27 Lock lever

Claims (1)

An operation handle is pivotally attached to the fixed main body fixed to the front side of the door by a transverse pivot, and the fixed main body is provided with a latch member that engages and disengages a receiving metal fixed to the container side. When the operation handle is pulled out and rotated, the latch member is driven to the unlocked position, and the door is unlocked from the housing, while the fixed base guide hole fixed to the back side of the door, and the door A door with an internal unlocking mechanism in which a push bar inside the storage is inserted through a receiving hole penetrating the front and rear, and the latch member is driven to the unlocking position by pressing the internal push bar from the inside of the storage. Lock handle device for
A sealing member made of a heat insulating material is mounted in a space between the inner surface of the receiving hole formed in the door and the outer surface of the inner push bar, and the inner surface of the sealing member and the outer surface of the inner push rod are A lock handle device for a door with an internal unlocking mechanism, wherein the internal push rod is in close contact so as to be slidable.

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