JP3277689B2 - Door opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is applicable to intermediate doors in containers to which a differential pressure is applied, such as vacuum containers and pressurized containers, as well as doors provided in containers receiving internal pressure and opening and closing inward. The present invention relates to a simple door opening and closing mechanism.

[0002]

2. Description of the Related Art FIG. 5 illustrates a heat treatment furnace having a movable door. In this heat treatment furnace, a heating chamber 2 and a cooling chamber 3 are formed at positions adjacent to each other in a chamber 1.
A partition 4 having an opening 4a is provided at a position for partitioning the partition, and an intermediate door 5 is provided detachably with respect to the partition 4. The intermediate door 5 is driven by an opening / closing mechanism 6 to close the opening 4a when attached to the partition 4 to partition the two chambers 2 and 3, and to open the opening 4a when separated from the partition 4. It serves to communicate between the two chambers 2 and 3. Particularly, when the workpiece W is transferred between the two chambers 2 and 3 at the time of opening, the intermediate door 5 must be retracted to a position where the opening 4a can be completely opened. Therefore, the opening and closing mechanism 6 shown in FIG.
Forms an empty space S in the surface direction of the intermediate door 5 and
And the actuator 6a is fixed to the outer wall of the chamber 1 corresponding to the position of the space S, and the actuator 6a and the intermediate door 5 are connected by a link mechanism 6b to operate the actuator 6a. At this time, the intermediate door 5 in the closed position is first moved in a direction substantially perpendicular to the surface to separate it from the partition 4, and then pulled up substantially perpendicularly to a position where it does not interfere with the workpiece W. I have.

[0003]

However, if such an opening / closing mechanism 6 is used, it is inevitable that a convex projection 1a corresponding to the clearance space S of the intermediate door 5 must be formed above the chamber 1. For this reason, the furnace structure is deformed, which causes a disadvantage that the strength of the chamber 1 is reduced. In the furnace, the inside of the chamber 1 is generally set to a vacuum or a pressurized atmosphere depending on the purpose of use, and a large differential pressure is usually generated between the furnace and the outside of the chamber 1 particularly during pressurization. Therefore, when a fragile portion occurs in the chamber 1 as described above,
The internal pressure that can be handled to protect the chamber 1 from damage increases, which directly leads to a performance problem that the versatility and functions of the entire furnace are significantly reduced. In addition, there are various problems such as the difficulty in manufacturing the irregularly shaped chamber 1 and the restriction on the arrangement.

[0004] The present invention has been made in view of such problems, and even in an apparatus having a door in a vessel, such as the above-described furnace, generally, an unreasonable projection of the furnace or vessel is required. It is an object of the present invention to provide a door opening / closing device that can properly open and close a door without forming a part.

[0005]

In order to achieve the above object, the present invention employs the following configuration.

That is, the door opening and closing device according to the present invention detaches the door from the partition and opens and closes an opening formed in the partition, and guides the follower attached to the door and the follower. A guide, a hinge point for restricting the behavior of the door when the follower moves along the guide, and an actuator for urging the door, wherein the actuator is operated with respect to the door in the closed position. In this case, after the door is moved in a direction substantially perpendicular to the surface by the guide action of the follower and the guide, the door is substantially turned around the hinge point.

A particularly preferred embodiment is one in which the door is assumed to be in a posture in which the door is inverted at a substantially right angle by the turning operation.

[0008]

With such a construction, the follower may be attached to the door, and the guide and hinge mechanism may be provided around the solid formed when the surface of the door is projected in the normal direction. The actuator can also be arranged at a position facing the door. Therefore, it is not necessary to secure a protruding portion corresponding to the escape allowance of the door in the surface direction of the door, and it is not necessary to form a deformed portion in the furnace or the container. As a result, the toughness of the furnace, the container, and the like, and thus the strength, can be increased, and simplification of production and improvement of the space factor can be expected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a heat treatment furnace to which the present invention is applied. Since the basic structure of this furnace is substantially the same as that of the conventional example shown in FIG. 5, common portions are denoted by the same reference numerals and description thereof is omitted.

The opening / closing mechanism 7 for the intermediate door 5 in this embodiment is configured in the cooling chamber 3 and includes a cam follower 71, a guide rail 72, a hinge point 73, and an opening / closing cylinder 74 as an actuator. are doing.

The cam followers 71 are mounted in pairs near the periphery of the intermediate door 5 in pairs. Specifically, the intermediate door 5
A pair of bars 70 extend substantially parallel to the core direction at two opposing positions near the peripheral edge of the surface on the side of the cooling chamber 3, and a shaft 71 is attached to the side surface near the base end of these bars 70.
The cam follower 71 is axially mounted vertically through a.

The guide rail 72 is provided with the cam follower 7.
1 are formed on a pair of plates 72a disposed in the cooling chamber 3 at positions facing each other perpendicular to the core. That is, when the surface of the intermediate door 5 is projected in a direction perpendicular to the surface, these plates 72a are arranged at positions adjacent to the projected image, and one end is fixed to the partition wall 4. ing. A groove is formed in a surface on the opposite side of these plates 72a, and the groove is
We use as 2. The cam follower 71 is rotatably loosely fitted on the inner periphery of the left and right guide rails 72. The shape of the guide rail 72 is such that a substantially horizontal first region A over a certain distance starting from the side closer to the intermediate door 5 and a hinge point 73 as a center with the end of the first region A as a starting end.
The second region B forms a substantially circular arc over 0 °.

The hinge point 73 gives a substantially circular center of the second area B of the guide rail 72, and is set on a pin 73a projecting from the inner surface of the plate 72a. The bar 70 is extended through the long hole 70a. That is, assuming that the cam follower 71 has moved from the start end to the end in the first area A of the guide rail 72, the bar 70 and the intermediate door 5 move in the same direction accordingly. The movement is absorbed by moving from one end to the other end along the pin 73a. Also, the cam follower 71 is
Assuming that the bar 70 and the intermediate door 5 try to follow similarly in the second region B of FIG. 2, the bar 70 and the intermediate door 5 try to follow each other, but at this time, one end of the bar 70 is By keeping the point 73, the behavior of the bar 70 and the intermediate door 5 is restricted, and as a result,
The bar 70 and the intermediate door 5 are caused to rotate about the hinge point 73 as a fulcrum.

The opening / closing cylinder 74 is fixed to the end 1b of the chamber 1 located in the direction of the core. The operating rod 74a is inserted into the chamber 1, and the tip is connected to the cam follower via a link member 74b. It is pivotally connected to a shaft 71a of 71. That is, the advance / retreat driving force of the opening / closing cylinder 74 is converted into the moving force of the cam follower 71 via the link member 74b and the shaft 71a.

A floor 3a is provided in the cooling chamber 3 at a position where the workpiece W is arranged. The cam follower 71, the plate 72a, the bar 70, the pin 73a, etc., which constitute the opening / closing mechanism 7, are provided. All the floor 3a and the workpiece W
Is arranged at a position that does not interfere with the disposition space of. Also,
One end of a cross rail 8 is hinged to the front end of the floor 3a via a hinge 8a, and the other end of the cross rail 8 leans against the intermediate door 5 in the closed position. When the transition rail 8 is rotated about the hinge 8a and is substantially aligned with the floor 3a, it is locked by a stopper (not shown).
Further, in the figure, 2a is a heat insulating material mounted on the intermediate door 5, 3b is a fan for strong cooling, and 3c is a cylinder for transporting the workpiece W.

Next, the operation of this embodiment will be described. When the intermediate door 5 is in the closed position in FIG.
When the operating rod 74 is operated to drive the operating rod 74a in the immersion direction, the driving force is transmitted to the shaft 71a of the cam follower 71 via the link member 74b, and the cam follower 71 moves from the start end to the end of the first area A of the guide rail 72. Start moving. Then, along with this, the bar 70 and the intermediate door 5 move in a direction substantially perpendicular to the surface, and separate from the partition 4. Meanwhile, the long hole 70a of the bar 70 protruding from the intermediate door 5 is provided.
Moves from one end to the other along the pin 73a. Next, the cam follower 71 is moved to the first area A of the guide rail 72.
When the cam follower 71 starts to descend in an arc, the bar 70 starts a pivoting operation with the hinge point 73a as a fulcrum. And perform a turning operation. Then, when the cam follower 71 reaches the end of the second area B as shown in FIG. 4, the opening / closing actuator 74 comes into contact with the end and stops. Then, the intermediate door 5 is reversed in a substantially right angle direction from the initial posture, and retracts under the floor 3a. As a result, the opening 4a formed in the partition 4 is completely opened. Further, with the retreating operation of the intermediate door 5, the crossing rail 8 hinged to the floor 3a falls down, and the space between the heating chamber 2 and the cooling chamber 3 is communicated. Here, if the transport cylinder 3c is operated, the workpiece W can be transported between the two chambers 2 and 3. When the opening / closing cylinder 74 is reversely driven from this state, the intermediate door 5 is returned to the closed position shown in FIG. 1 again by the reverse operation.

As described above, the opening / closing mechanism 7 of this embodiment is
The heating chamber 2 and the cooling chamber 3 are provided with the intermediate door 5 attached to the partition 4.
The intermediate door 5 is retracted from the partition wall 4 to allow the two chambers 2 and 3 to communicate with each other. With such a configuration, most of the components can be disposed around the floor 3a and the space where the workpiece W is disposed. There is no need to form 1a in the chamber 1. For this reason, the toughness and pressure resistance of the chamber 1 can be increased, and the performance and durability of the entire furnace can be reliably improved. Further, since the chamber 1 does not have an irregular shape,
Manufacture becomes simpler than before, and the space factor when installing or incorporating the entire furnace at a target place is improved.

The present invention is not limited only to the above-described embodiment. For example, in the above embodiment, the opening / closing cylinder and the transfer cylinder are provided separately, but they may be selectively switched and used by a common cylinder. Further, as shown in the figure, a seal 10 may be provided between the partition and the intermediate door to airtightly partition the atmosphere in both rooms when the door is closed. Further, in the above embodiment, the door is configured to be turned clockwise in the drawing and retracted below the floor, but on the contrary, the door is inverted counterclockwise to be retracted upward, or Alternatively, it is also possible to adopt a configuration in which the sheet is inverted and retracted to the rear side of the drawing. Furthermore, the present invention can be applied to a door provided in a container receiving internal pressure and opening and closing inward, a door provided between each chamber in a continuous furnace, and the like. Other configurations can be variously modified without departing from the spirit of the present invention.

[0020]

As described above, the door opening / closing device according to the present invention is configured so that the door is pivotally retracted from the opening of the partition wall by the cooperation of the guide, the follower and the hinge point. Since these components including the actuator can be compactly incorporated on the retreat side, there is no need to form a projecting part on the furnace or the vessel, etc., and it is excellent in reliably improving the pressure resistance of the furnace and the vessel and, consequently, the durability. It has the effect. Further, since a furnace or a container does not require a deformed portion, manufacturing can be simplified, and a space factor at the time of handling can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an exemplary perspective view showing a main part of the embodiment with some parts omitted;

FIG. 4 is an operation explanatory view corresponding to FIG. 1;

FIG. 5 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 ... Partition wall 4a ... Opening 5 ... Intermediate door 71 ... Cam follower 72 ... Guide rail 73 ... Hinge point 74 ... Actuator (opening / closing cylinder)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F27D 1/18 C21D 1/00 111 C21D 1/00 112 F27B 5/00-5/18

Claims (1)

(57) [Claims] 1. A door opening / closing device for attaching and detaching a door to and from a partition and opening and closing an opening formed in the partition, comprising: a follower attached to the door; a guide for guiding the follower; A hinge point that restricts the behavior of the door when the follower moves, and an actuator that biases the door, and when the actuator is operated with respect to the door in the closed position, the door is moved to follower and A door opening / closing device characterized in that the guide opening / closing device is configured to be moved in a direction substantially perpendicular to the surface by the guide action of the guide, and then substantially rotated about a hinge point.