JP2816859B2 - Transfer equipment for continuous furnace - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for a continuous furnace for transporting a product or a bed on which the product is placed in a continuous furnace.

2. Description of the Related Art A conventional continuous furnace transfer device will be described with reference to FIG. The platform 1 on which the object to be fired (product) 2 is placed is transported on the transport path R1 by a pusher (pusher conveyor) (arrow Y1). Then, it is pushed out to the transport path R2 by an actuator, for example, a cylinder piston device (not shown). Another cylinder piston device OP10 is provided in the transport path R2, and pushes out the base 1 in the direction of the firing furnace. The pushing operation of the cylinder piston device OP10 includes a fast-forward moving operation and a slow-forward moving operation. That is, the leading edge of the board performs fast-forwarding in the section A, and performs slow-forwarding in the section B.

In such a continuous furnace transfer device, the platform cannot be sent on the transfer path R2 while the cylinder piston device OP10 is performing the retreat operation (return operation). For this reason,
The feed operation of the bed sent into the furnace is intermittent,
A feed stop time of 2 minutes occurs.

Problems to be Solved by the Invention As described above, when the feed stop time of the product is one minute or more, the temperature control error in the furnace becomes large, and is about ± 5 ° C. Such a large temperature error is caused by intermittent feeding of a low-temperature product into a high-temperature furnace. If the temperature error is large, there is a high possibility that the quality of the heat-treated product varies.

On the other hand, by the intermittent (discontinuous) feed,
There is also a problem that the heat treatment time is prolonged and the productivity is reduced.

SUMMARY OF THE INVENTION In view of the problems of the related art, the present invention can reduce the temperature control error in a furnace by shortening a feed stop time of a base plate or a product and maintaining a continuous feed operation,
It is another object of the present invention to provide a continuous furnace transfer device that enables uniform temperature change of a product to be fired and stabilization of furnace atmosphere characteristics.

Another object of the present invention is to provide a continuous furnace transfer device capable of improving the production efficiency of the heat treatment step.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention relates to a transport device for transporting a product or a platform on which the product is placed, comprising:
And a second carrying path formed adjacent to the first carrying path, and a product sent from the first carrying path or a platform on which the products are placed is moved along the second carrying path. Feeding means, and when the feeding means is performing a retreating operation, the product sent by the feeding means or the platform on which the product is placed is held from the side by the holding means to the second carrying path. The present invention provides a transfer device for a continuous furnace, which is provided with a holding and feeding means for feeding along a continuous furnace.

Effect of the Invention According to the transfer device for a continuous furnace of the present invention, a product (or a base) is sent from the first conveyance path to the second conveyance path by the feeding means, and the feeding means performs a retreat operation. In this case, the product is sent along the second transport path while holding the product from the side by the holding means, so that the feed stop time can be reduced to zero or shorter, and the feeding operation of the product (or base) is continuously fed, or It can approach continuous feed. Therefore, the feed in the furnace can be always in a continuous state, and the control error of the furnace temperature can be set to about ± 1 ° C. Further, the working efficiency can be improved by reducing or shortening the feed stop time.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a top view showing the vicinity of an entrance of a baking furnace in a transfer apparatus according to the present invention, and FIG. 2 is a side view showing a part of FIG. 1 in cross section.

The transport path R1 and the transport path R2 are formed in an L shape. The platform 1 is transported on the transport path R1 in the Y1 direction, and transported to the position P1 on the transport path R2. The transport path R2 leads to the inside of the firing furnace 3, and the transport path R1
And orthogonal. The base 1 moves in an L shape on the transport paths R1 and R2. In FIG. 1, the transport path R1 and the transport path R2 are examples of the same horizontal plane, but may have a different horizontal structure. In this case, an elevating device is used to match the product and the platform to the horizontal plane of the transport path R2. Is provided.

The transport path R1 is composed of a pusher device, and an actuator (not shown) is provided at the end of the transport path R1. The platform is transported to the P1 position by this actuator.

By the way, the actuator is a device that performs mechanical work using fluid energy such as oil or compressed air in a narrow sense, but in the present specification, it is understood in the broadest sense and uses electrical energy. It also includes equipment that performs mechanical work.

An actuator OP1 is provided as an example of the feeding means 4 in the right extension of the transport path R2. For example, a cylinder piston device is used as the actuator. A plate 20 is provided at the tip of the actuator OP1. In FIGS. 1 and 2, the plate 20 is in front of the base 1 at the position P1 and is not in contact therewith. The actuator OP1 can expand and contract in the direction of arrow B.

A holding and feeding means 5 having a holding means is provided next to the actuator OP1. The holding and feeding means 5 has three actuators OP2 to OP4. The actuators OP3 and OP4 constitute holding means.

An actuator OP2 is provided below the transport path R2 along the transport path R2. The actuator OP2 can expand and contract in the direction of arrow B. A slide member 21 is fixed to the tip of the actuator OP2. The slide member 21 is located below the transport path R2, and its longitudinal direction is orthogonal to the transport path R2. Actuators OP3 and OP4 are provided at both ends of the upper surface of the slide member 21.
Are arranged facing each other, and serve as holding means. Plates 22, 23 are fixed to the ends of the actuators OP3, OP4, respectively. The actuators OP3 and OP4 can extend and contract in the direction of arrow A, and hold and release the base plate.

When the actuator OP2 expands and contracts in the direction of arrow B, the slide member 21 and the holding means (actuators OP3 and OP4) move together. At this time, the holding means (actuator OP3, OP
If 4) holds the board 1, the board 1 is also transported in the X1 direction.

In the continuous feeding state, the feeding means and the holding feeding means are operated, for example, in the following procedure. The operations of the actuator and the furnace are computer-controlled as is well known, but will not be described in detail in the present invention. Switches SW1 to SW3
Although not shown in the drawings, the installation position can be easily determined from the following description.

The transport path is shifted from the transport path R1 by an actuator (not shown).
The first platform is sent to the P1 position of R2 (arrow Y1).

X1 base plate by feed means 4 (actuator OP1)
, And the top of the board moves in the C section.
At the end point of the section C, the feeding means 5 (actuator OP3,
In OP4), the pressure switch SW1 is activated by an increase in the oil pressure operating OP1 in contact with the rear of the base plate that is being delayed in the X1 direction. The signal of the pressure SW1 is sent to the actuator OP1.

The board is switched from the fast-forward to the slow-feed operation by the feed means 4 (actuator OP1) by the signal of the pressure switch SW1, and the top of the board moves in the D section. The limit switch SW2 operates at the end point of the section D.

Holding means (actuator in holding and feeding means 5)
OP3 and OP4) operate and sandwich the base plate. When the entrapment is completed, the limit switch SW3 is operated, and the feeding means 4 (actuator OP1) shifts from the forward operation to the high-speed retreat operation. The actuator OP2 starts the slow-forward operation at the same time as the completion of the sandwiching by the actuators OP3 and OP4. That is, the holding and feeding means 5 starts the feeding operation at the same time as holding the base plate. The so-called platform while passing through the furnace moves at a constant speed without stopping or decelerating.

When the actuator OP1 retreats to the position shown in FIG. 1, the next board is sent in the direction of arrow Y by an actuator (not shown) and moves to the position P1. This operation is the same as the operation described above.

Actuator OP1 performs a fast-forward operation and moves the base to X1
Send in the direction. If the tip of the board contacts the first board in the middle, the pressure switch SW1 is activated. The actuator OP1 shifts to the slow feed by the signal of the switch SW1. The slow feed speed is the same as the feed speed of the holding and feeding means 5. This operation is the same as the operation described above. At this time the actuator
OP3, OP4 operate, release the first platform that was held,
The actuator OP2 moves backward. That is, the holding and feeding means 5 releases the first board and performs a retreat operation.

The above operations (1) to (5) are repeatedly performed. Note that, for convenience of explanation, there are overlapping parts in the above-described operation cycle. Operation 4 feed means 4 (actuator OP1)
It is important that the platform is fed forward by the holding / feeding means 5 (especially the actuator OP2) even when is retracted. By performing such an operation, it is possible to set the stop time of the base plate to zero and perform continuous feeding.

Next, with reference to FIGS. 3 and 4, a mechanism for taking out the base plate at the outlet of the furnace 3 will be briefly described. The product 2 and the base 1 that have been subjected to the predetermined heat treatment by the furnace 3 are sent in the direction of arrow X1 on a transport path R3 composed of two tracks.

An actuator OP5 is provided on an extension of the carrying path R3. A support member 25 is fixed to the tip of the actuator OP5. The width of the support member 25 is set to a width that can enter between the tracks R3. The actuator OP5 is fixed to the support 26, and the support 26 is configured to move up and down by the actuator OP6. The platform can also be horizontally transferred without the actuator OP6. In that case R3
It is possible to increase the height of the plate side by 1 to 2 mm by receiving the side with a roller and the 25 side as a plate.

 Next, an example of the extracting operation will be briefly described.

As shown in FIG. 3, the platform 1 on the support member 25 is pushed out to the transport path R4 by the actuator OP7, and the actuator OP7 is returned.

Extend the actuator OP5 and move the support member 25 to the transport path R3.
It is inserted below the next platform 1 located above.

The actuator OP6 is extended, the actuator OP5 and the support member 25 are lifted upward, and the base 1 is lifted from the track.

Activate the actuator OP5 to move the platform to the extension of the transport path R4.

By operating the actuator OP6, the platform is moved downward to the same height as the transport path R4.

By repeating the above operations (1) to (4), the board is taken out one after another.

Next, a modification of the present invention will be described with reference to FIG. Here, only differences from the embodiment shown in FIGS. 1 and 2 will be described.

The holding and feeding means 6 has two actuators OP2 and OP3.

On the upper surface of the support member 21 provided at the tip of the actuator OP3, the actuator OP3 and the pressing member 27 are provided,
It constitutes holding means. A plate 28 is fixed to an end of the holding member 27. The right end of the plate 28 may be curved so that the platform pushed out by the feeding means 4 (actuator OP1) is reliably guided by the curved surface of the plate 28.

In the embodiment of FIG. 5, the base 1 is held by operating the actuator OP3 of the holding means and pressing the base 1 against the plate 28. When releasing the base 1, the actuator OP3 is operated in the opposite direction.

Note that the present invention is not limited to the above embodiments. For example, the direction of the actuator OP2 may be reversed, and the base may be sent forward when the actuator is contracted. Further, the actuator OP2 does not need to be provided below the transport path R2, and may be provided on the side or above the transport path R2.

[Brief description of the drawings]

FIG. 1 is a plan view showing the vicinity of an inlet of a furnace in a continuous furnace transfer apparatus according to one embodiment of the present invention, FIG. 2 is a side view showing a part of FIG. 1 in cross section, and FIG. FIG. 4 is a plan view showing a partial cross section of FIG. 3, FIG. 5 is a plan view showing another embodiment, and FIG. 6 is a plan view showing the prior art. 1 Base 2 Product 3 Furnace OP1 to OP7 Actuator 4 Feeding means 5, 6 Holding and feeding means

Continued on the front page (72) Inventor Susumu Ito 1-25-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Toshiba Ceramics Co., Ltd. 127399 (JP, U) Jikken 61-18024 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) F27B 9/38 F27D 3/04 B65G 25/08

Claims (1)

(57) [Claims] 1. A transport device for transporting a product or a platform on which the product is mounted, comprising: a first transport path and a second transport path adjacent to the first transport path; Feeding means for feeding the product sent from the carrying path or the platform on which the product is placed along the second carrying path, and the feeding means which is fed by the sending means when the feeding means is performing a retreat operation. A transfer device for a continuous furnace, comprising a holding and feeding means for feeding a product or a platform on which the product is mounted from a side by a holding means and sending the product along a second carrying path.