JP2977762B2 - Heater door opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door opening and closing device for a heating cabinet such as a grill and a gas oven incorporated in a gas table.

[0002]

2. Description of the Related Art In a grill, a gas oven, or the like incorporated in a gas table, a door of a heating cabinet is automatically rotated by opening and closing a door in a vertical direction as a work receiving tray is put in and out of the heating cabinet. As a door opening / closing device for a heating cabinet that opens and closes,
Conventionally, there are, for example, Japanese Utility Model Laid-Open No. 2-48709 (hereinafter referred to as Conventional Example 1) and Japanese Utility Model Laid-Open No. 1-100017 (hereinafter referred to as Conventional Example 2).

In the prior art example 1, a door opening rod is provided at the tip of a slide rod interlocking with a water tray so as to rise obliquely rearward and upward, and when the water tray is pulled out, the grill door is raised by the door opening rod. It is structured to lift and open.

[0004] Further, Conventional Example 2 is disclosed in
As shown in FIGS. 2 and 3, an arm fixed inside the door body at a predetermined distance and a cam interlockingly connected to a handle of the water tray are provided in association with each other. The arm is pushed to move the door body to the open position as it moves outwardly in conjunction with.

[0005]

In the prior art 1 of the prior art described above, when the slide rod and the door open rod advance forward from the stored state, the grill door is lifted by the door open rod and pivots counterclockwise in the drawing. When the slide rod and the door open rod are pushed backward from the open state, as the door open rod retreats, the lifting and holding thereof is released, and the door open rod is rotated by its own weight in the clockwise direction in the drawing to close.

Accordingly, when the grill door is opened, the door opening rod standing upward in an arc shape is pulled out to the front of the grill main body together with the water dish, so that when the object to be cooked such as fish is returned, the door opening rod is opened. The rod is in the way, and it is difficult to return it, and it is difficult to use it in actual use, for example, the hand may touch the door open rod, causing burns, and its operation is not reliable. Met.

In the prior art 2, when the water is moved out of the dish, the tip of the arm is pushed outward by the cam as the cam moves outward in conjunction with the handle, and the door body integral with the arm is pushed. The door body is pushed open to the open position via the arm, and when the water tray is stored, the door body is closed via the arm by an operation opposite to that when the water tray is pulled out.

Therefore, since the door body is opened and closed only by the contact operation in which the arm makes a circular movement with respect to the horizontal movement of the cam, the frictional resistance between the cam and the arm becomes remarkable in conjunction with the holding operation of the door body at the open position by the arm. There is a problem that not only is the operability difficult, but also the operation is not reliable.

[0009] In view of the above-mentioned problems of the prior art, the applicant of the present invention has disclosed a grill door opening / closing device, in which the grill door is lightened as the grill pan is taken in and out, and
An application that is surely opened and closed, is easy to use, and has excellent operability has already been filed (Japanese Utility Model Application No. 3-9938).
No. 6).

As shown in FIG. 5, the grille door opening / closing device according to the prior application automatically rotates the grille door upward during a forward stroke of the grill pan when the grille door is fully closed to fully open. A spring 4 'for holding the grill door in the open position is hooked to a base end 3c' of the connecting rod 3 'and a hooking piece 18' provided on the side wall of the grill storage, and the grill door is pulled by its pulling force. It is urged in the opening direction via the connecting rod 3 '.

However, in the case of the prior application, as shown in FIGS. 5 and 6, at the start of the operation, that is, at the start of opening the door (when the door is fully closed), the spring 4 'is stretched most. The driving force for opening the door (the driving force for pushing out the water tray 1 ') is the maximum Fs'. In addition, since the force required to open the door when the door is fully closed is very small, the water tray 1 'tends to suddenly pop out with a small force.

On the other hand, in the fully opened state of the door, as can be seen from the graph of FIG. 6, the force for holding the door in the open state was small, Fo ', and the door was liable to swing with a slight impact and was unstable.

The present invention provides a door opening / closing apparatus for a heating cabinet which is easy to use and maintains a substantially constant operating force from the start of operation (when the door is fully closed) to when the door is fully opened, and provides a smooth operation feeling. It is an object.

[0014]

In order to achieve the above object, a door opening / closing apparatus for a heating cabinet according to the present invention is provided so that the door of the heating cabinet is opened in a one-way manner in the vertical direction when the object to be cooked is put in and out of the heating cabinet. In the door opening and closing device for a heating cabinet which is opened and closed in a shape, the door is provided via a pan and a connecting rod so as to be interlocked with only a reciprocating stroke from when the door is fully opened to fully opened and from fully opened to fully closed, and the pan in the advancing and retracting stroke is provided. A transmission means for converting the forward / backward movement of the door into a rotational movement of the door, a biasing means for biasing the door in the opening direction, and a drive for biasing the door in the opening direction as the opening degree of the door is larger. Driving force adjusting means for increasing the force.

[0015]

The door opening / closing device for a heating cabinet according to the present invention has the above-mentioned configuration. When the trays stored in the heating cabinet are taken in and out, the doors of the heating cabinet are vertically opened in a one-way manner in conjunction with the movement of the pans. It is opened and closed. In this case, the force required to open the door is greater as the door is closer to the open position, but the greater the degree of opening of the door, the greater the driving force that urges the door in the opening direction. The operating force with which the pan is taken in and out can be made substantially constant from the fully closed to fully open state of the door. As a result, the door is opened and closed in a stable manner, and is easy to use.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an apparatus for opening and closing a door of a heating cabinet according to the present invention.

The embodiment is applied to a grill incorporated in a gas table. In FIGS. 1 to 4, reference numeral 1 denotes a dish tray, that is, a grill dish, and a heating chamber for the grill, that is, a grill chamber A. It slides linearly along guide rails 6 provided on both sides of the bottom wall 5, and is provided so that it can be easily stored in and escaped from the grill storage A through the front opening 7 of the grill storage A. Have been.

A handle 8 is integrally fixed to a front portion of the grill plate 1 via a mounting member 9, and a grill 10 on which a food such as fish is to be mounted is detachably mounted on the grill plate 1. Is placed.

Reference numeral 2 denotes a heating cabinet door, that is, a grill door.
The grill door 2 is pivotally mounted on a front opening 7 of the grill warehouse A by a support shaft 11, and the grill door 2 is provided so as to be pivotable about the support shaft 11 by a fixed angle (approximately 90 degrees) in a vertically open one-sided manner. The front opening 7 of the grill storage A is opened and closed by the handle 8 of the grill pan 1.

When the grill door 2 is fully closed (when the grill pan 1 is stored), the lower end 2a of the grill door 2 is brought into contact with the inside of a projection 8a provided on the handle 8 of the grill pan 1. When the grill door 2 is fully opened (when the grill pan 1 is pulled out), the grill pan 1 linearly moves forward and the grill door 2 rotates. The opening of the grill door 2 can be performed without any trouble (see FIG. 1).

Numeral 3 denotes a connecting rod as a transmitting means for linking the grill plate 1 and the grill door 2 with each other at a predetermined forward / backward stroke a of the grill plate 1, and as shown in FIG. The distal end shaft portions 3b of the side portions 3a are inserted into the distal end shaft holes 12a of the arm rods 12 provided on the grill door 2, and the base end portions 3c are formed in the side walls 13 of the grill storage A. It is inserted into the slide hole 14 via the rotary roller 15 and is brought into contact with the back surface portion 1a of the grill dish 1.

The slide hole 14 is for guiding the forward / backward movement of the connecting rod 3 and for regulating the forward / backward movement of the connecting rod 3 to a constant forward / backward stroke a. Numeral 1 is interlocked with an urging means B, which will be described later, via a driving force adjusting means C, and the grill door 2 is opened and closed by transmitting the advance and retreat movement of the grill pan 1 in the advance and retreat stroke a to the rotational movement of the grill door 2. It has become so.

It should be noted that the regulation of the fully open position (substantially horizontal position) and the fully closed position (substantially vertical position) of the grill door 2 is performed by a constant forward / backward stroke a by the slide hole 14 as in the embodiment, but not shown. This may be performed by regulating the rotation angle of the grill door 2 to a fixed angle.

In the embodiment, the base end 3c of the connecting rod 3 is inserted into the slide hole 14 through the rotary roller 15 so that the slide operation can be performed lightly by the rotary roller 15. It suffices if the frictional force is small with respect to the applied vertical component.

B is an urging means for pushing upward and turning the grill door 2 from the fully closed position to the fully opened position and for holding the grill door 2 at the fully open position. The tension door 4 is used to hook both ends thereof to an intermediate pivot 16 of a driving force adjusting means C to be described later and a hooking piece 18 provided on a partition plate 17, and the grill door is in a fully closed state by the tension of the spring 4. 2
Is urged in the opening direction (clockwise direction in the figure), and the grill pan 1 in the stored state is urged through the driving force adjusting means C and the connecting rod 3 in the drawing direction (left side in the figure).

As the urging means B, a compressive spring may be used in place of the tension spring 4 in the embodiment, and any other urging member may be used.

C denotes the driving force of the urging means B,
A driving force adjusting means for correcting the operating force from a fully closed state to a fully opened state, wherein the fixed side link 20 has a base end pivotally supported by a pivot 19 and is free to swing; 20
A link having a base end pivotally supported by a pivot 16 at the distal end thereof and a movable link 21 pivotally supported at the base end 3c of the connecting rod 3 by linking both links 20, 21 in a substantially V-shape. Mechanism.

The V-shaped link mechanism associated with the connecting rod 3 has one end of a pulling sprout 4 serving as the urging means B hooked on an intermediate pivot 16. The link mechanism is urged in the opening direction (the direction in which the angle of the V-shape increases).
0,21 approach, V-shaped angle is small, grill door 2
Is fully opened, the two links 20 and 21 are separated from each other to increase the V-shaped angle (see FIG. 4).

Therefore, as shown in detail in FIG. 4, the driving force of the pulling ridge 4, ie, the linear pulling force f of the pulling ridge 4, is turned to the movable link 21 of the link mechanism, and A component force b in a direction substantially orthogonal to the force f is a force for pushing and opening the grill door 2.

Then, the component force b is set to a substantially constant load or a characteristic in the opposite direction with respect to the pulling force of the wire 4 (see the force obtained by the prior application in FIG. 6), and the grill door 2 is fully closed to fully opened. Up to a substantially constant operating force.

The driving force adjusting means C is not limited to the link mechanism of the above-described embodiment, but may be a correction mechanism other than the link mechanism.

In the figure, 22 is a grill burner, 23 is an exhaust path, 24 is an exhaust port, 25 is a gas table, and 26 is a stopper for storing a grill dish.

The operation of the above arrangement will now be described. When the grill pan 1 is housed in the grill storage A, the grill door 2 is in a substantially vertical closed position and the pull mechanism 4 is pulled by the link mechanism. Is biased in the opening direction (clockwise direction in the figure) via the connecting rod 3 by a pressing force converted to a substantially constant load or a component force b having a characteristic in the opposite direction to the pulling force f, and The grill pan 1 is also urged in the forward direction (leftward in the figure) via the connecting rod 3 (see the solid line in FIG. 1 and the chain line in FIG. 4).

Therefore, when using the grill, when the grill pan 1 in the storage state is pulled straight forward along the guide rail 6 with the handle 8, the grill pan 1 is fixed by the original slide hole 14. In the forward stroke a, the connecting rod 3 and the grill pan 1 urged by the pressing force of the component b move together and move forward, and the grill door 2 moves through the connecting rod 3 to the support shaft 11. Is pivoted upward (clockwise in the drawing) and fully opened (see the state of the solid line from the state of the solid line in FIG. 1).

When the grill pan 1 is pulled out by a predetermined forward stroke a, the grill door 2 is in a substantially horizontal fully open state, and thereafter is held at the fully open position by the pressing force of the component b.

When the grill pan 1 is subsequently pulled forward, only the grill pan 1 is thereafter pulled out to a predetermined position while the grill door 2 is kept at the fully open position. .

After the grill dish 1 is filled with water and the objects to be cooked such as fish are placed on the grill 10, when the grill dish 1 is stored in the grill storage A, the grill dish 1 is moved backward along the guide rail 6. When the grill pan 1 reaches a certain reversing stroke a, the rear part 1a of the grill pan 1 comes into contact with the base end 3c of the standby connecting rod 3, and thereafter the grill pan 1 and the connecting rod Reference numeral 3 integrally moves rearward (rightward in the figure) by a retreat stroke a, extends the pulling sprout 4 via a link mechanism, and applies a constant pulling force to the sprout 4.

Here, the grill door 2 is pulled by the connecting rod 3 which retreats together with the grill pan 1 while the grill pan 1 retreats by a certain retraction stroke a, and reaches a substantially vertical fully closed position as shown in FIG. Pull down and rotate to close, grill pan 1
Is stored at a predetermined position in the grill storage A (see the state of the solid line in FIG. 1).

In this way, the grill door 2 is turned up and down and automatically opened and closed by opening and closing the grill plate 1 into and out of the grill warehouse A. Is fully closed to fully open, the linear pulling force f of the pulling ridge 4 is applied to the movable side link 2 of the link mechanism.
1 and the component force b in a direction substantially perpendicular to the pulling force f acts as a force for pushing the grill door 2 open (see FIG. 4).

Since the component force b is set to a substantially constant load or a characteristic in the opposite direction with respect to the tensile force of the sprung 4, it is shown in FIG. As described above, the force required to open the door and the force obtained by the present invention are substantially parallel, and the driving force (F _s) from the start of the opening of the grill door 2 to the end of the opening of the grill door 2.
F _O ) is substantially constant, and the operating force is kept substantially constant. As a result, it is possible to achieve both sufficient securing of the force for holding the grill door 2 in the open state and prevention of the grill plate 1 from suddenly popping out when the grill door 2 is fully closed, which is very convenient.

[0041]

The door opening / closing device for a heating chamber according to the present invention is easy to use because the door opens and closes in conjunction with the insertion and removal of the pan, and the greater the opening of the door, the less the urging force in the opening direction of the door. Because the door is large, the operating force from the fully closed to the fully opened door can be maintained at a substantially constant level.As a result, the door can be opened and closed lightly and securely when the pan is taken in and out. It is very easy to use because it has good properties.

[Brief description of the drawings]

FIG. 1 is a partial cutaway side view of a heating door opening / closing device according to the present invention.

FIG. 2 is a front view cut along line XX of FIG. 1;

FIG. 3 is a cut-away plan view of only essential parts.

FIG. 4 is an enlarged side view showing only a driving force adjusting unit.

FIG. 5 is a side view of only a main part of the invention according to the prior application.

FIG. 6 is a graph showing a relationship between a stroke and a driving force.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Heating cabinet 1 Cooking object tray 2 Heating cabinet door a Reciprocating stroke 3 Connecting rod 4 Spring B B urging means C Driving force adjusting means

Claims (1)

(57) [Claims] 1. A heating / closing door opening / closing device in which a door of a heating cabinet is opened / closed in a vertically-opening manner in accordance with taking-in / out of a food-receiving pan into / from a heating cabinet, wherein the door is connected to the pan via a connecting rod. A door is provided so as to be able to interlock only the forward and backward strokes from fully closed to fully opened and from fully opened to fully closed, and a transmitting means for changing the forward and backward movement of the tray in the forward and backward stroke to a rotational movement of the door, and transmitting the door in the opening direction. A door opening / closing device for a heating cabinet, comprising: urging means for urging; and driving force adjusting means for increasing a driving force for urging the door in an opening direction as the opening degree of the door is larger. .