JP2004308175A - Lock handle device for two-stage opening type door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock handle device for a two-stage opening type door, by which the door can be finally opened widely after the stage of being initially opened narrowly, and which makes the door quietly closed without an unnecessary impact. <P>SOLUTION: This lock handle device is composed of a handle unit and a latch unit, which are to be fixedly mounted on the door, and an operating handle of the handle unit is turned between a first position and a second position, which are separated from each other at a fixed angle. A latch body, which is fixedly attached to a handle shaft, is engaged with the backside of a receiving metal, body on the side of a casing. A latch bolt, which is engaged with/disengaged from a striker on the side of the casing, and a slider, which is connected to the handle shaft by means of a connecting member, are housed in the latch unit so as to be capable of protruding/receding. A latch pulling cam body, which is pivotally mounted on the slider, is turned and urged by a spring member so as to be engaged with a locking and receiving part of a side surface part of the latch bolt. When the door is put into an initially opened state, the latch bolt is engaged with the striker. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock handle device used for opening and closing a door and for locking a housing.
[0002]
2. Description of the Related Art In a lock handle device for a door used in a cooking appliance such as a steam oven, when the door is fully opened at a stretch, steam or hot air in a housing is intensively blown to the operator's face, which may cause a burn. Because of this, the door was first opened to a narrow opening, and during this initial opening stage, steam and hot air were allowed to escape from the periphery of the door, and care was taken not to spray a large amount directly onto the operator's face. Design is required.
[0003]
According to such a demand, when the operation handle is in the down position, a first hook portion that engages with the lock bar of the metal fitting and locks the door with respect to the housing is provided at the distal end portion of the lock lever, When the operation handle is raised, a second hook portion that enters behind the lock bar is provided at the distal end of the lock lever, and the second hook portion protrudes toward the door side from the first hook portion to provide a play space between the two. A provided door lock handle device has been proposed (see Patent Document 1).
[0004]
In addition, a single striker in which the outer latch bolt and the inner latch bolt are housed side by side in the thickness direction of the door in the fixed case, and the distal ends of the inner and outer latch bolts urged forward by the spring member are sequentially engaged. A moving body moving in the length direction of the latch bolt is accommodated in the fixed case, and a latch traction cam having a first hook and a second hook engaged with and disengaged from the latch bolt is pivotally connected to the distal end of the moving body. When the outer latch bolt is in the advanced position and the inner latch bolt is in the retracted position, the latching traction cam is held at an intermediate position where the latch traction cam can be engaged with both latch bolts by another spring member. For a two-stage open door, in which the latch engages both latch bolts simultaneously when the cam engages only the outer latch bolt while both latch bolts are in the advanced position. Even pitch device has been proposed (see Patent Document 2).
[0005]
However, the operation method of opening and closing the door in the conventional device disclosed in Patent Literature 1 is such that when the door is opened, the operator raises and rotates around a pivot axis parallel to the front of the door, but does not touch the operation handle when the door is closed. This is a method in which the operator pushes the door toward the housing by hand, so if the operator violently pushes the door, a strong impact is applied to the lock lever and the bracket, and the door is locked during long-term use. The lever and the bracket may be deformed or damaged. In addition, when the door is closed under a large shock vibration, the food or the like before steaming or baking is easily deformed or undulated, which causes defective products.
[0006]
The door latch device disclosed in Patent Literature 2 is provided with a pair of latch bolts inside and outside, so that it is mechanically complicated, and it is difficult to reduce the cost of manufacturing and processing.
[0007]
[Patent Document 1] Japanese Patent No. 2869060 [Patent Document 2] Japanese Patent No. 3193907 [0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a system in which the door is finally opened to a wide opening after the stage of initial opening to a narrow opening, so that the operator is prevented from the concentrated ejection of steam or hot air. It is an object of the present invention to provide a lock handle device for a two-stage openable door, which is securely protected and the door is closed quietly and safely without unnecessary impact.
[0009]
A lock handle device for a two-stage openable door according to the present invention comprises a handle unit 2 provided on the front side of a door 1 and a latch unit 3 provided on the back side of the door 1. Consisting of
The handle unit 2 is fixed to a fixed seat 4 fixed to the door 1, an operation handle 5 rotatably fitted to the fixed seat 4, and fixed to a handle shaft 6 of the operation handle 5. A latch 9 engaged with the back side of the receiving member 8, and the operation handle 5 rotates forward and reverse between a first position and a second position separated by a certain angle,
The latch unit 3 includes a fixed case 10 that is fixed to the door 1, a latch bolt 12 that is housed in the fixed case 10 so as to be able to advance and retreat, and a tip portion of which is disengaged from a striker 11 on the housing 7 side. A spring member 13 that moves and urges in the forward direction; a slider 15 that is housed in the fixed case 10 so as to advance and retreat along the side surface of the latch bolt 12 and that is connected to the handle shaft 6 via the linking member 14; The latch traction cam body 18 is pivotally attached to the pin 15 by a pin 17, and the tip hook 19 is engaged with the locking receiving portion 21 on the side surface of the latch bolt 12. A tip end surface portion 23 slidably in contact with a protruding end cam surface portion 24 of the striker 11 is formed at a tip end portion of the latch bolt 12. The distal end portion of the latch pulling the cam member 18, and the passive cam surface portion 25 of the drive cam face portion 26 of the latch bolt 12 is in sliding contact is formed,
At the stage when the door 1 is initially opened to a small opening, the latch bolt 12 and the slider 15 move forward integrally by the urging of the spring member 13, and the tip of the latch bolt 12 engages the striker 11, thereby opening the door. 1 is set to be held at the initial open position.
[0010]
In the lock handle device for a two-stage open type door according to the present invention, when the door 1 is closed and locked to the housing 7 as shown in FIGS. Is located at a first position where the grip portion 5a is vertically arranged, and the latch 9 is engaged with the back side of the receiver 8.
The tip of the latch bolt 12 is merely in contact with the upright wall of the striker 11, and the locking of the door 1 by the engagement between the latch bolt 12 and the striker 11 is not established. The tip hook 19 of the latch traction cam body 19 only abuts against the side surface of the latch bolt 12, and the engagement between the latch traction cam body 18 and the latch bolt 12 is not established.
[0011]
When the operating handle 5 is rotated from the first position to the second position by a predetermined angle, for example, 90 degrees, in order to unlock the door 1 and rotate the door 1, the operating handle 5 is turned horizontally. Comes to the second position located. In this second position, the connecting member 14 is relaxed.
When the operation handle 5 at the second position is pulled forward and the door 1 reaches the initial opening position with a small opening as shown in FIG. 3, the latch bolt 12 moves forward by the bias of the spring member 13, The tip of the latch bolt 12 engages with the recess 75 of the striker 11. That is, the door 1 is now locked to the housing 7 via the latch bolt 12 and the striker 11.
During the forward movement of the latch bolt 12, the tip hook 19 of the latch traction cam body 18 is engaged with the lock receiving portion 21 of the latch bolt 12 by the bias of the spring member 20.
[0012]
At this initial opening position, steam and hot air are dispersed and escape from the peripheral opening of the door 1. When the operation handle 5 is returned from the second position to the first position and rotated as shown in FIG. 4 after the discharge of the steam or the like is completed, the connecting member 14 is pulled and pulled, and the latch bolt 12 is pulled by the latch pulling cam. The slider 18 is retracted integrally with the slider 15 by the intervention of the body 18. Thereby, the lock of the door 1 with respect to the housing 7 is released.
By pulling the grip 5a of the operation handle 5 at the first position toward the front, the door 1 is finally opened to a required wide opening.
[0013]
After the door is finally opened to a wide opening and required operations such as taking in and out of the cooked food into and from the housing 7 are completed, the operation handle 5 is moved to the first position as shown in FIG. The latch 9 is rotated from the position to the second position so that the latch 9 does not collide with the receiver 8.
At this second position, the connecting member 14 is relaxed, so that the latch bolt 12 and the slider 15 are integrally advanced by the bias of the spring member 13 through the interposition of the latch pulling cam body 18, and the tip cam surface portion 23 of the latch bolt 12. Project outside the fixed case 10.
[0014]
When the door 1 is closed and rotated, the front cam surface portion 23 of the latch bolt 12 comes into contact with the protruding cam surface portion 24 of the striker 11 immediately before the opening degree of the initial opening is reached. When the closing rotation of the door 1 is continued in this state, the tip cam surface portion 23 is pressed against the protruding cam surface portion 24, so that the latch bolt 12 is retracted against the bias of the spring member 13. After passing through the protruding end cam surface portion 24, the latch bolt 12 advances again by the urging of the spring member 13, the leading end of the latch bolt 12 engages with the striker 11, and the door 1 is initially opened as shown in FIG. Temporarily held in position.
[0015]
When the door 1 is pushed further toward the housing 7 from this rotational position, the tip cam surface portion 23 of the latch bolt 12 comes into sliding contact with the edge 75a of the concave portion 75 of the striker 11, and the latch bolt 12 is retracted. When the latch bolt 12 moves relative to the slider 15, the driving cam surface 26 of the latch bolt 12 comes into sliding contact with the passive cam surface 25 of the latch towing cam body 18. The tip hook 19 is rotated against the spring member 22, and detaches from the lock receiving portion 21 of the latch bolt 12.
When the operation handle 5 is returned from the second position to the first position and rotated after the door 1 is fully closed, the latch 9 wraps around and engages with the back side of the receiver 8, and the door 1 is attached to the housing 7. Lock the door so that it cannot be opened.
[0016]
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, as shown in FIG. 2, a bearing cylinder 27 of a fixed seat 4 of a handle unit 2 is fitted into a through hole 27 formed in the front-rear direction of a door 1. The fixed seat 4 is fixed to the door 1 by a fastening nut 29 screwed to the rear end screw portion 28 and a front end flange portion 30 abutting on the front of the door. As shown in FIG. 13, four detent grooves 31 are radially formed on the front surface of the front flange 30 at intervals of 90 degrees.
[0017]
As shown in FIG. 12, the intermediate main body portion 32 of the handle shaft 6 is rotatably fitted into the bearing cylinder 27, and the front end angular shaft portion 33 of the handle shaft 6 is inside the root portion 34 of the operation handle 5. The handle shaft 6 is inserted into a through-hole 36 formed in the partition wall 35, and is screwed into a screw portion 37 by a tightening nut 38 and a stepped surface 39 abutting on the rear end surface of the bearing cylinder 27. Is irremovably attached to the operation handle 5. The front opening 40 used during this mounting operation is closed by a cap 41.
[0018]
A detent board 42 is fitted into the root portion of the front end angular shaft portion 33 through a square hole 43 so as to be relatively non-rotatable. A detent case 45 is fitted into the rear opening 44 of the operation handle 5 so as to be relatively non-rotatable. I have. The detent board 42 fitted in the detent case 45 so as to be movable in the front-rear direction is held by the guide screw 46 screwed on the front surface so as to be relatively unrotatable with respect to the detent case 45. On the rear surface of the detent board 42, four detent projections 47 are radially formed at 90-degree intervals as shown in FIG. The compression coil spring 48 fitted to the front end angular shaft portion 33 is compressed between the front wall 49 of the detent case and the detent plate 42, and urges the detent plate 42 toward the front end flange portion 30 of the fixed seat 4. are doing.
[0019]
At the rear end portion of the handle shaft 6 protruding from the bearing cylinder portion 27, a so-called oval-shaped cross section 50 having both side surfaces deleted by parallel surfaces is provided as shown in FIG. A small hole 51 is formed so as to be orthogonal to the parallel surface, and as shown in FIG. 8, the rotary support shaft 52 of the roller type latch body 9 inserted into the small hole 51 is crimped. It is attached to the oval-shaped section 50 by, for example, the above. As shown in FIG. 6, an L-shaped connecting member bracket plate 53 is welded to the surface on which the rotation support shaft 52 is mounted, that is, the position opposite to the latch member 9, as shown in FIG. As shown in (1), the end of the connecting member 14 made of a wire is passed through the through hole 55 of the horizontal plate portion 54 of the bracket plate 53 and is subjected to a retaining process.
[0020]
The receiving body 8 of the handle unit 3 is formed of an L-shaped plate as shown in FIGS. 7 and 8, and one of the wing plates 56 is formed by cutting out a curved raised plate portion 57 with which the latching body 9 is pressed. A locking recess 58 is formed at the apex of the curved raised plate portion 57 into which the roller-type latch 9 enters the back side when the door 1 is locked, into which the latch 9 is fitted when tightening and locking is established. . Two long slots 60 for adjustment are formed in the other wing plate 59 of the L-shaped plate, and continuous adjustment grooves 61 are formed on both end surfaces of the wing plate 59. A continuous groove 64 for adjustment is formed in a pair of wall plates 63 of the bracket plate 62 for a receiver. After adjusting the amount of protrusion of the metal receiving member from the front of the housing 7 by engaging the continuous adjusting grooves 61 and 64 with each other, the adjusting groove is screwed into the screw hole 65 of the bracket plate 62 from the adjusting long hole 60. The receiving body 8 is fixed to the bracket plate 62 by the fastening screw 66.
[0021]
The protrusion of the striker 11 of the latch unit 3 from the front of the housing 7 is adjusted by engaging the adjustment continuous groove 68 on the striker bracket 67 side with the adjustment continuous groove 69 on the striker 11 side. , Is fixed to the bracket 67 by a fastening screw 71 screwed from the adjusting long hole 70. In the portion where the tip of the latch bolt 12 is disengaged, the recess 75 on the side surface of the protruding end of the striker 11 is formed in a trapezoidal cross section.
[0022]
The fixed case 10 of the latch unit 3 has the left and right sleeve plates 73 fixed to the back surface of the door 1 by fastening screws 74. The latch bolt 12 and the slider 15 are housed in the fixed case 10 with their side surfaces in contact with each other, and the tip of the latch bolt 12 protrudes from the lower surface opening 72 of the fixed case 10. The latch bolt biasing wing member 13 is formed of a compression coil spring compressed between the upper surface wall 76 of the fixed case 10 and the upper end surface of the latch bolt 12. A guide piece 77 is in contact with the other side of the slider 15. The other end of the connecting member 14 made of the wire is connected to the upper end of the slider 15 protruding from the upper opening 78 of the fixed case 10.
[0023]
A plate-like latch traction cam body 18 is swingably fitted in a slit 16 formed in the middle part of the slider 15 and penetrating in the left-right direction. 17 pivotally attached to the slider 15. The spring member 22 that rotationally urges the latch traction cam body 18 is configured by a compression coil spring that is compressed between the base end of the latch traction cam body 18 and the overhanging wall 79 of the slit 16. A slot 20 penetrating in the left-right direction is formed in an intermediate portion of the latch bolt 12, and a lock receiving portion 21 to which the tip hook 19 of the latch traction cam body 18 is engaged and disengaged is provided at a rear edge of the slot 20. Is formed. The lower surface of the tip hook 19 is a passive cam surface portion 25.
[0024]
In the lock handle device for a two-stage opening type door of the present invention constructed as described above, the operating handle 5 is turned from the first position to the second position, and the latch 9 is moved from the receiving member 8. When the door 1 is disengaged and the door 1 is pulled forward by the operation handle 5 to be opened, the latch bolt 12 and the slider 15 move forward integrally with each other at a stage where the opening has progressed to a small opening degree, that is, at an initial opening stage. Is engaged with the striker 11 and this engaged state is maintained by the spring member 13, so that steam and hot air inside the housing 7 are dispersed and escape from the peripheral opening of the door 1. In addition, the operator is properly protected from burn accidents caused by concentrated squirting on the face.
[0025]
Further, in the lock handle device for a two-stage opening type door of the present invention, the latch bolt 12 is automatically engaged with the striker 11 when the door 1 that has been closed and rotated returns to the initial opening position, so that the door 1 is locked. When the movement is stopped and the operation handle 5 is confirmed to be in the second position, the door 1 is closed and the rotation is resumed, the latch bolt 12 is disengaged from the striker 11 by cam action, and Then, after the door 1 is fully closed, the operation handle 5 is turned from the second position to the first position to engage the latch body 9 with the receiving body 8, so that the door 1 is inadvertently taken. When the door is closed and rotated, the latch body 9 does not collide with the receiver body 8 to cause such deformation and damage, and the door 1 is closed relatively quietly. Apply unnecessary impact vibration to body 7 Never give a bad deformation and modifications to the goods.
[0026]
Furthermore, the slider 15 is connected to the end of the connecting member 14 connected to the handle shaft 6 of the handle unit 2, and the latch traction cam body 18 is pivotally connected to the slider 15 to unify the latch bolt 12. The internal structure of the latch unit 3 is simplified, and the cost of the manufacturing process as a whole can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing a locked state of a lock handle device for a two-stage opening type door according to one embodiment of the present invention, and an operation handle is in a first position.
FIG. 2 is a right side view of the lock handle device for a two-stage opening type door of FIG.
FIG. 3 is a right side view when the operation handle is rotated to a second position from the state of FIG. 1 and the door is moved to an initial opening position.
4 is a right side view when the operation handle is returned to the first position and rotated from the state of FIG. 3 to finally open the door.
FIG. 5 is a right side view when the operation handle is turned to a second position prior to closing and rotating the finally opened door.
FIG. 6 is a rear view of the handle unit used in the lock handle device for the two-stage opening type door of FIG. 1;
FIG. 7 is a sectional view taken along line AA of FIG. 2;
FIG. 8 is a sectional view taken along line BB of FIG. 2;
FIG. 9 is a sectional view taken along the line CC of FIG. 7;
FIG. 10 is a right side view of a striker of the latch unit used in the lock handle device for the two-stage opening type door of FIG. 1;
FIG. 11 is a plan view of the striker of FIG. 10;
FIG. 12 is a longitudinal sectional view of the handle unit of FIG. 6;
FIG. 13 is a front view of a fixed seat of the handle unit of FIG. 6;
FIG. 14 is a rear view of a detent board of the handle unit of FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door 2 Handle unit 3 Latch unit 4 Fixing seat of handle unit 5 Operating handle 6 Handle shaft 7 Housing 8 Receptacle 9 Hook 10 Fixing case of latch unit 11 Striker 12 Latch bolt 13 Latch bolt urging spring member Reference Signs List 14 Linking member 15 Slider 16 Slider slit 17 Crossing pin 18 Latch tow cam 19 Latch tow cam tip end hook 20 Latch bolt slot 21 Latch bolt lock receiving part 22 Latch tow cam biasing spring member 23 Latch Bolt tip cam surface portion 24 Striker protruding end cam surface portion 25 Latch pulling cam body passive cam surface portion 26 Latch bolt driving cam surface portion

Claims (1)

A handle unit 2 provided on the front side of the door 1 and a latch unit 3 provided on the back side of the door 1;
The handle unit 2 is fixed to a fixed seat 4 fixed to the door 1, an operation handle 5 rotatably fitted to the fixed seat 4, and fixed to a handle shaft 6 of the operation handle 5. A latch member 9 engaged with the back side of the receiving member 8, the operation handle 5 rotates forward and reverse between a first position and a second position separated by a certain angle,
The latch unit 3 includes a fixed case 10 that is fixed to the door 1, a latch bolt 12 that is housed in the fixed case 10 so as to be able to advance and retreat, and a tip portion of which is disengaged from a striker 11 on the housing 7 side. A spring member 13 that moves and urges in the forward direction; a slider 15 that is housed in the fixed case 10 so as to advance and retreat along the side surface of the latch bolt 12 and that is connected to the handle shaft 6 via the linking member 14; The latch traction cam body 18 is pivotally attached to the pin 15 by a pin 17, and the tip hook 19 is engaged with the locking receiving portion 21 on the side surface of the latch bolt 12. The latch bolt 12 is formed with a spring member 22 that rotates and biases, and a distal end surface portion 23 that slides on a protruding end cam surface portion 24 of the striker 11 is formed at the distal end portion of the latch bolt 12. The distal end portion of the latch pulling the cam member 18, and the passive cam surface portion 25 of the drive cam face portion 26 of the latch bolt 12 is in sliding contact is formed,
At the stage when the door 1 is initially opened to a small opening, the latch bolt 12 and the slider 15 move forward integrally by the urging of the spring member 13, and the tip of the latch bolt 12 engages the striker 11, thereby opening the door. A lock handle device for a two-stage openable door, wherein 1 is held at an initial open position.

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