JP5197982B2 - Upper lid support structure of furnace body and continuous heat treatment apparatus - Google Patents

Description

  The present invention relates to an upper lid support structure applied to a furnace body that performs heat treatment, and a continuous heat treatment apparatus including the same.

  Some heat treatment apparatuses such as a drying furnace include an upper lid for opening an upper portion of the furnace body. When the furnace body is provided with an upper lid, it is convenient when performing work on the furnace body such as guiding a workpiece to a predetermined position of the furnace body. However, if there is no mechanism for holding the upper lid open, it is necessary to work on the furnace body with the other hand while supporting the upper lid with one hand. Such a one-handed operation is inefficient and dangerous.

In view of this, some conventional techniques employ a mechanism that fixes the furnace body with the upper lid opened. Among them, there is a technique for restraining the opening position of the upper lid with a ratchet (see, for example, Patent Document 1).
Registered Utility Model No. 3037069

  However, as described in Patent Document 1, in the mechanism that opens and closes the upper lid with a wire and a winch, it takes time to open and close the upper lid. In view of avoiding temperature drop in the furnace, it is desirable that the upper lid can be opened quickly and can be closed quickly after the work is completed.

  In addition to the technique described in Patent Document 1, it is conceivable to use a member such as a pulling rod and fix it with the upper lid open. However, the pulling rod may interfere with the operation of the furnace body. . If the workability deteriorates, the time for opening the upper lid becomes longer. As a result, the temperature in the furnace body is likely to decrease.

  In addition, there is a limitation that a mechanism having a problem in heat resistance cannot be adopted when applied to a furnace body.

  An object of the present invention is to provide an upper lid support structure and a continuous heat treatment apparatus capable of improving the work efficiency of work performed by opening the upper lid of a furnace body with a simple configuration.

  The upper lid support structure according to the present invention is applied to a furnace body that performs heat treatment on a workpiece. The upper lid support structure includes an upper lid and a hinge portion.

  The upper lid is configured to cover the upper part of the furnace body. The upper lid has a shaft supported therein so as to be slidable in the front-rear direction. As an example of the configuration for supporting the shaft, there is a configuration in which a pipe is attached in the upper lid and the shaft is inserted into the pipe.

  The hinge portion is provided on the back side of the furnace body. The hinge part rotates the upper lid with respect to the furnace body. The hinge part has a rotating part. The rotating portion includes a first through hole that is disposed on an extension line of the shaft in a state where the upper lid is opened at a predetermined angle and into which the shaft can be inserted.

  When the upper lid is opened, the shaft slides to the back side of the upper lid by its own weight. When the upper lid opens at a predetermined angle and the first through hole is arranged in the traveling direction of the shaft, the shaft fits into the first through hole and penetrates the rotating portion. As a result, since the hinge portion is fixed, the upper lid cannot be closed even if the hand is released from the upper lid.

  In this configuration, the work of opening and fixing the upper lid is automatically performed. In addition, since the mechanism for fixing with the upper lid opened is disposed on the back side, there is no obstacle to the work.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to improve the working efficiency of the work performed by opening the upper cover of a furnace body with a simple structure.

  A drying furnace 10 according to an embodiment of the upper lid support structure of the present invention will be described with reference to FIG. Here, the drying furnace 10 corresponds to the continuous heat treatment apparatus of the present invention. The drying furnace 10 includes a control unit 12 and a furnace body 14. The control unit 12 includes a control board for controlling the operation of each unit of the drying furnace 10.

  The furnace body 14 includes a heater (not shown) inside and heats the internal workpiece. In this embodiment, a strip-shaped thin steel sheet wound around a winding device (not shown) disposed at the front stage and the rear stage of the furnace body 14 is used as the workpiece. Moreover, the internal temperature of the furnace body 14 at the time of heat treatment is set to about 300 ° C.

  The furnace body 14 includes a plurality of upper lids 16 arranged so as to close the gaps. Each of the upper lids 16 is attached to the main body of the furnace body 14 via a hinge portion 18 disposed on the back side. The upper lid 16 is provided with a handle 22 on the front side.

  As shown in FIG. 2, the upper lid 16 includes a pipe 24 arranged from the front surface toward the back surface. The shaft 20 is slidably provided in the hollow portion of the pipe 24.

  The structure of the pipe 24, the shaft 20, and the hinge part 18 is demonstrated using FIG. 3 (A), FIG. 3 (B), FIG. 4 (A), and FIG. 4 (B). As shown in FIGS. 3A and 4A, the pipe 24 is provided with a long hole 26 in a part thereof. On the other hand, the shaft 20 is provided with a protrusion 28 configured to fit into the long hole 26. The slidable range of the shaft 20 is defined by the long hole 26 of the pipe 24 and the protrusion 28 of the shaft 20. The reason for adopting such a mechanism is to prevent the shaft 20 from falling off the pipe 24.

  As shown in FIGS. 3A and 4A, a first through hole 184 and a second through hole 182 are formed in the rotating portion of the hinge portion 18. The first through hole 184 and the second through hole 182 are configured so that the shaft 20 can be inserted therein. The first through hole 184 is formed so as to be disposed on an extension line of the shaft 20 when the upper lid 16 is opened at a predetermined angle (in this embodiment, about 60 degrees). The second through hole 182 is formed so as to be disposed on the extension line of the shaft 20 when the upper lid 16 is closed. In this embodiment, the cross section of the shaft 20, the first through hole 184, and the second through hole 182 have a circular shape, but these shapes are not limited to a circular shape.

In a state where the shaft 20 as shown in FIG. 3 (A) and (B) is pulled forward, since the shaft 20 does not penetrate to the rotating part 186 of the hinge portion 18, the upper cover 16 relative to the body of the furnace body 14 Can be rotated. In contrast, in the state pushed the shaft 20 on the rear side as shown in FIG. 4 (A) and (B), since the shaft 20 to the rotating part 186 of the hinge portion 18 penetrates the upper cover 16 furnace body 14 It cannot be rotated with respect to the main body.

  When the upper lid 16 is opened, the shaft 20 slides to the back side due to the weight of the shaft 20 and tries to protrude from the pipe 24. Since the first through-hole 184 is disposed in the traveling direction of the shaft 20 when the upper lid 16 is opened by about 60 degrees, the shaft 20 is in the first position as shown in FIGS. 5 (A) and 5 (B). It fits in the through hole 184 of. Then, the shaft 20 penetrates the rotating part 186 of the hinge part 18. For this reason, even if a hand is removed from the upper cover 16, the state in which the upper cover 16 is opened is maintained. In this state, when closing the upper lid 16, the shaft 20 is pulled forward and the shaft 20 is pulled out from the first through hole 184. As a result, the upper lid 16 can be rotated with respect to the main body of the furnace body 14, so that the upper lid 16 can be returned to a horizontal position.

  If the shaft 20 is pushed back after the upper lid 16 is closed, the upper lid 16 can be locked with the upper lid 16 closed as shown in FIGS. 6 (A) and 6 (B).

  According to the above-described embodiment, when the upper lid 16 is opened at a predetermined angle, the upper lid 16 is automatically locked. At this time, workability is good because a member that may interfere with the work is not disposed on the front side of the upper lid 16. In this embodiment, when setting the work in the drying furnace 10, it becomes easy to guide the tip of the work to the opening of the drying furnace 10 using both hands, and the time for opening the upper lid 16 can be shortened. As a result, poor drying due to a decrease in the internal temperature of the furnace body 14 is unlikely to occur. In addition, since the furnace body 14 can be partially opened if a plurality of upper lids 16 are provided as in this embodiment, the internal temperature of the furnace body 14 is further less likely to decrease.

  Further, since the shaft 20 is accommodated inside the upper lid 16, it is not necessary to prepare a separate accommodation space for the shaft 20. Further, since the upper lid 16 does not open unless the shaft 20 is pulled out toward the front, the lock when the upper lid 16 is closed with a simple configuration is realized.

  In the case of the upper lid support structure described in this embodiment, there is no portion that protrudes in the workpiece conveyance direction, so that even if the upper lid is arranged without gaps along the workpiece conveyance direction, it can be installed without any problem. Is possible. For this reason, it can be said that the above-described upper lid support structure has a particularly remarkable effect when a plurality of upper lids are provided in a continuous furnace.

  In the above-described embodiment, the upper lid 16 is locked in a state where the upper lid 16 is opened about 60 degrees, but the opening angle of the upper lid 16 can be changed by changing the position of the first through hole 184. Further, by providing another through-hole, it is possible to provide variations in the opening angle of the upper lid 16.

  In the drying furnace 10 described above, the upper lid support structure of the present invention is applied to all upper lids, but the upper lid support structure of the present invention may be applied only to the upper lid that is frequently opened.

  The above description of the embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

It is a perspective view which shows the outline of a drying furnace. It is a top view which shows the outline of a drying furnace. It is a figure which shows the structure of a shaft, a pipe, and a hinge part. It is a figure which shows the structure of a shaft, a pipe, and a hinge part. It is a figure which shows the state which locked the open upper cover. It is a figure which shows the state which locked the closed upper cover.

Explanation of symbols

10-drying furnace 14-furnace body 16-top cover 18-hinge part 20-shaft 24-pipe

Claims (5)

An upper lid support structure applied to a furnace body that performs heat treatment on a workpiece,
An upper lid covering the top of the furnace body;
A hinge part for rotating the upper lid with respect to the main body of the furnace body, provided on the back side of the main body of the furnace body;
With
The upper lid has a shaft supported therein so as to be slidable in the front-rear direction,
The hinge part is an upper cover support structure of a furnace body having a rotating part which is disposed on an extension line of the shaft in a state where the upper cover is opened at a predetermined angle and has a first through hole through which the shaft can be inserted. The upper lid of the furnace body according to claim 1, wherein the rotating portion of the hinge portion further includes a second through hole that is disposed on an extension line of the shaft in a state where the upper lid is closed and into which the shaft can be inserted. Support structure. A continuous heat treatment apparatus for performing heat treatment on a workpiece conveyed inside,
A furnace body having a plurality of upper lids arranged along the conveying direction of the workpiece;
A hinge portion provided on the back side of the main body of the furnace body for rotating the upper lid with respect to the main body of the furnace body;
With
At least one of the plurality of upper lids has a shaft that is slidable in the front-rear direction inside,
The said hinge part is a continuous heat processing apparatus which has a rotation part provided with the 1st through-hole which can be inserted in the said shaft while being arrange | positioned on the extension line of the said shaft in the state in which the said upper cover opened the predetermined angle. 4. The continuous heat treatment apparatus according to claim 3, wherein the rotating portion of the hinge portion further includes a second through hole that is disposed on an extension line of the shaft in a state where the upper lid is closed and into which the shaft can be inserted.   The continuous heat treatment apparatus according to claim 4, further comprising a defining mechanism that defines a slidable range of the shaft.

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