JPH0222626Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a method for transporting objects to be processed, such as long materials that have been subjected to painting treatment, etc., into the drying chamber through the object entrance (opening) provided at the bottom of the drying chamber. The present invention relates to a large-scale hot air drying device that can be carried out.

Conventional technology A conventional large hot air drying device is shown in Figure 4 (side sectional view).
As shown in FIG.
Several pieces are hung as one lot from the hot air drying chamber 13'a (13' is the main body) and conveyed to the entrance side conveyor 14'a by a conveying means (not shown) such as a trolley installed outside the hot air drying chamber 13'a (13' is the main body). The conveyor 14'a moves sequentially in the direction of the arrow until it reaches the drying chamber 13'a.
reaches the delivery position to the inlet side lifter 15'a. One lot of workpieces 11' that have reached the same position are supported by the basket 16'a of the entrance side lifter 15'a at the delivery position of the entrance side conveyor 14'a, and are lifted up (details of the mechanism are omitted). 'a and reaches the upper limit position of the inlet side lifter 15'a, the drive source 1 disposed outside the drying chamber 13'a
7', the pushing pawl 19' of the cross-feeding rod 18' installed in the drying chamber 13'a pushes the carrier bar 12' of one lot of workpieces 11', which has reached the above-mentioned upper limit position, to 1P. (Pitch) Move horizontally.
That is, the workpiece 11' that has reached the upper limit position is transferred from the basket 16'a portion of the inlet side lifter 15'a to the transfer rail 20' in the drying chamber 13'a.
The pitch is fed by repeating the operation of the horizontal feed mechanism (rod 18', push claw 19') several times,
It reaches the position where it is transferred to the outlet side lifter 15'b (during which time the object to be processed 11' is dried). The object to be processed 11' is transferred to the basket 16'b at the upper limit position of the outlet side lifter 15'b, and the basket 16'b is lowered by the operation of the outlet side lifter 15'b, and the object to be processed 11' is moved out of the drying chamber 13'a. Get out. At the same time as it exits, the object to be processed 11' is transferred onto the exit side conveyor 14'b, and by the operation of the conveyor 14'b, it is moved to a conveyance/delivery position to the next process. 21' is a hot air introduction duct device (for circulation blowing), and 22' is a hot air discharge duct device (for circulation suction). The conventional large hot air drying apparatus described above has the following drawbacks.

(A) In the drying room (within the high-temperature range), thermal effects are unavoidable on the transfer operation between the transverse feed mechanism of the processed material, the lifter mechanism, and the transfer rail. Misalignment due to thermal expansion, such as a shift in the delivery level, and malfunctions due to backlash or interference may occur.

(B) Items that are easily affected by the heat of the drive source (motor, etc.) for the cross-feeding mechanism need to be placed outside the drying room, while the power is required for the cross-feeding mechanism inside the drying chamber, so the The transmission mechanism is installed through the main wall of the drying chamber, and heat loss from the through hole is unavoidable.

(C) The biggest problem is that, functionally, the objects to be processed in the drying chamber are fed sequentially, so it is difficult to handle a wide variety of objects with different types of paint, coated film thickness, and shapes and dimensions of the materials to be processed. There is a problem in that it is not possible to take individual measures such as adjusting the residence time in the drying chamber for each lot.

Problems to be Solved by the Invention The present invention aims to eliminate the drawbacks of the conventional large-scale hot air drying apparatus, and has the following formal structure.

(1) As mentioned earlier, there are many different types of objects to be processed by drying equipment, and depending on conditions such as the thickness of the paint film in the previous process and the shape and length of the object, There is no single optimal drying condition.
It is necessary to provide appropriate drying conditions (temperature, residence time in the drying chamber, etc.) corresponding to each workpiece in each lot.

The present invention is a hot air drying device that can meet such requests. It is a well-known condition that each item to be processed is of the same type and sent to the production line as the same lot, but recently, processing equipment that can handle the production of a wide variety of products in small quantities and the trend towards higher quality products has become required to accommodate detailed conditions. Therefore, in the drying apparatus according to the present invention, in order to vary the drying conditions for each lot, the objects to be dried can be taken in and out of the drying chamber individually, and the drying conditions can be individually set for each lot. It uses a programmable timer that operates according to the residence time in the drying chamber. Of course, if the objects to be processed in each lot have the same size and shape, the above-mentioned timer may be set so as to equalize the residence time in the drying chamber.

(2) At a lower position outside the drying chamber, there is a predetermined length (a means for receiving each lot to be processed from the pre-processing process before the drying process, and a means for transporting the processed items to the post-processing process after drying is completed). A conveyor for horizontally transporting the processed material is installed.

(3) In the drying chamber above the horizontal transport conveyor, each of the plurality of lots to be processed, which have been transferred to the delivery position on the same conveyor (transferred from the previous process before drying), is individually placed in the drying chamber. It has a plurality of individual lifter devices which are raised to a drying position and, after staying there for a required period of time, are lowered and transferred onto the conveyor. That is, in the present invention, instead of transporting the objects to be processed horizontally in the drying chamber as in conventional equipment, a lifter device is installed for each of the plurality of objects to be processed. Since the drying chamber is moved in and out of the drying chamber, and the cross-feeding mechanism within the drying chamber is eliminated, the above-mentioned drawbacks caused by the cross-feeding mechanism within the drying chamber can be completely eliminated.

(4) Each of the lifter devices (transmits the rotational force of the prime mover located outside the drying room to the basket via a transmission means, raises and lowers it along the groove of the guide rail section, and lifts each rod cover supported by the basket. (Lifter device that raises and lowers the processed material)
The lower part of the drying chamber is provided with an opening/closing lid that opens and closes the opening of the drying chamber in conjunction with the lifting and lowering operations of each lifter device. A portion of the opening/closing lid is cut out to prevent it from hitting the lifter device when opening/closing.

(5) The prime mover for raising and lowering the basket of each of the lifter devices is installed outside the drying chamber as described above, and the raising/lowering rail guide portions are respectively arranged at both ends of the opening of the entrance/exit to the drying chamber for the objects to be processed. There is.

(6) As mentioned above, the only mechanism inside the drying chamber that is involved in moving the objects to be processed is a lifter device for vertical movement, and the lifter device needs to penetrate the wall of the drying chamber to be processed at the bottom of the main body of the drying chamber. This device only utilizes both ends of the opening for the material inlet/outlet, and the heat loss from the through holes of the conventional device is drastically reduced. In other words, the conventional transverse feed mechanism located in the upper part of the drying chamber and the related drive transmission mechanism penetrating the drying chamber wall are unnecessary.

Embodiment Hereinafter, a description will be given based on FIG. 1 (partial longitudinal sectional front view), FIG. 2 (side sectional view), and FIG. 3 (illustrative diagram of the relationship between the lifter device and the opening/closing lid).

This embodiment simply shows the case of drying two lots of workpieces, one with a short workpiece and the other with a long workpiece, each having a different size and shape.

1 is the main body of the hot air drying chamber 1a, 3 is the object to be processed 2a
(Short workpiece), 2b (Long workpiece)
With each carrier bar, each of the above-mentioned workpieces 2 is attached to it.
a and 2b are vertically arranged to form individual lots. There are multiple lots (2
It has a space in which the two lots (a and 2b) of objects to be processed can be raised separately and accommodate all the lots.

A conveyor 4 for transversely transporting the processed material, which is disposed at a lower position outside the drying chamber 1a, has a predetermined length from a receiving position A from the pre-processing process before the drying process to a delivery position B to the post-processing process. In the middle thereof, there is a part for once receiving each lot 2a, 2b to be dried. Each lot 2a, 2b
Lifter devices L〓, L〓 are installed in the drying chamber 1a corresponding to the respective ones, and the parts indicated by . The figure shows the position at which the paper is delivered (at this time, the traversing conveyor 4 stops).

As shown in FIG. 1, the lifter devices L〓 and L〓 are separately provided facing each other on both sides of the drying chamber 1a when viewed from the front. It has a drying room 1
A drying chamber 1a for each workpiece 2a, 2b outside a.
The driving force of the prime mover 7 disposed at a partial opening of the entrance to the inside is transmitted to each of the baskets 6 through a transmission means (not shown), and the carrier bars 3 supported by the baskets 6 are connected to each other. The suspended objects 2a and 2b are raised and lowered. Each opening/closing lid 8 is provided at the lower opening of the drying chamber 1a, and is opened and closed in conjunction with the lifting and lowering of the basket 6 of each lifter device L〓, L〓. A portion of the opening/closing lid 8 is cut out to prevent it from being hit. 9 is a hot air introduction duct device (for circulation blowing), and 10 is a hot air discharge duct (for circulation suction).

Function: From the previous process, each carrier bar 3 for each lot and the two lots of workpieces 2a, 2b suspended from the carrier bar 3 are placed one after another at the receiving site A on the traverse conveyor 4 using a conveyance means such as a trolley. , by the operation of the same conveyor 4, each vertical lifter device is moved horizontally.
When the robots stop at the delivery positions L〓 and L〓, the baskets 6 of each lifter device located at the lower limit positions rise, and the workpieces of each lot are transferred to the respective baskets 6 via the carrier bars 3 of each lot.
It is supported by the drying chamber and rises into the drying chamber. In other words, at this time, the prime movers 10 corresponding to the respective lifter devices L and L are activated to raise each basket 6 supporting the carrier bar of each lot, and reach the upper limit position, that is, the retention position in the drying chamber 1a. At this point, each basket 6 stops. Here, after the required residence time corresponding to the short-sized workpiece 2a and the long workpiece 2b, that is, after the completion of the dry baking process (the operating time of each prime mover 7 is adjusted by a timer), respectively. The baskets 6 of the lifter device are individually lowered and returned to the traverse conveyor 4. Further, by the operation of the same conveyor device 4, the materials are transported laterally to a delivery position B for the subsequent process, and are sequentially transported out of the device. Each of the aforementioned lifter devices L〓,
When the object lot to be processed enters and exits the drying chamber 1a by the operation of L〓, each opening/closing lid 8 opens and closes the opening in conjunction with each other, and opens only when each lifter basket is being moved up and down, and closes at other times. Needless to say, this prevents thermal energy from being dissipated due to outflow of hot air in the drying chamber 1a.

(a) Furthermore, in the embodiment shown in Fig. 2, the workpiece lot is delivered almost simultaneously to both lifters at the position , in a state that matches the pitch between the corresponding intervals of the lifters L〓 and L〓. It is also possible to carry out the drying process for the same period of time, or it is also possible to separately deliver and dry the object lot to be processed at the position and the lot at the position. For example, a lot of objects to be processed can be processed at 20-minute intervals, and it is also possible to process at 10-minute intervals, or it is also possible to set a residence drying time for each lot of objects to be processed. It is.

(b) Furthermore, a hot air introduction duct device (blow duct) 9 and a hot air discharge duct (suction duct) 1 are installed at the location corresponding to the retention position in the drying chamber.
By switching the damper device in the duct, it is possible to change the temperature conditions for each position in the drying chamber 1a and provide drying conditions (temperature, time, etc.) suitable for each lot. be.

Constituent Functions and Effects of the Present Invention (i) The present invention has a structure in which a lifter device is provided for each of the plurality of lot objects to be processed, and each lot object to be processed is individually taken in and out of the hot air drying chamber. That is, since the drying chamber does not have any means for transporting the processed material horizontally, there is no thermal influence on the transfer operation between the lifter mechanism and the transfer rail, as in the conventional case.
That is, problems such as misalignment due to thermal expansion are eliminated.

(ii) In the conventional apparatus, the transmission mechanism from the drive source that operates the means for transversely transporting the processed material in the drying chamber must be installed with a through hole in the upper part of the wall of the drying chamber, thereby avoiding heat loss. However, in the present invention, each motor that operates each lifter device can be installed using a partial opening of the inlet/outlet of the processed material at the bottom of the drying chamber. There are no through holes, which greatly reduces heat loss.

(iii) Conventional equipment required an inlet conveyor and an outlet conveyor to transport each lot of processed materials into the drying chamber, but in the present invention, a pre-treatment device before the drying process is installed at the lower part of the outside of the drying chamber. A conveyor for transversely transporting processed materials, which has a predetermined length from a receiving position from a process to a delivery position to a post-processing process, and has a portion in the middle for delivering each lot processed material to a lifting lifter device. Since it is only necessary to provide , the overall structure is simplified.

(iv) Unlike the conventional first-in, first-out method in which the method of entering and exiting the drying chamber is changed and lots of objects to be processed are sent in sequence, a program method with a timer that operates based on a time difference allows for individual loading and unloading of each lot of objects to be processed. By adopting etc.
Since drying conditions can be selected individually, it is now possible to immediately respond to the drying requirements of a wide variety of products (different types of paint, coating film thickness, dimensions and shapes of materials to be treated, etc.).

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention,
Figure 1 is a partially vertical front view, Figure 2 is a partially vertical side view, Figure 3 is an explanatory diagram of the relationship between the opening/closing lid and the lifter device, and Figure 4 is a partially vertical front view of a conventional large-scale hot air dryer. It is a diagram. 1...Main body of the drying chamber 1a, 2a, 2b...To be processed, 3...Carrier bar, 4...Transverse conveyor, L〓, L〓...Lifter device, 5...Guide rail section, 6 ...Basket, 7...Motor, 8...Opening/closing lid, 9...Hot air introduction duct device,
10...Hot air discharge duct device.

Claims (1)

[Scope of utility model registration request] In a large hot-air drying oven, objects to be processed, such as long materials that have been subjected to painting treatments, etc., are transported into and out of the drying chamber through an opening provided at the bottom of the drying chamber. A drying room that has a space that can be raised and lowered in the vertical direction to accommodate
A plurality of delivery positions having a predetermined length at a lower position outside the drying chamber, and in the middle thereof, a plurality of lots of workpieces sent from the previous process side by side by a conveying means are delivered to the drying chamber. , a transverse conveyor device equipped with a transfer position with a conveying means for post-processing, and a plurality of lots to be processed, which have been transferred to the transfer positions on the transverse conveyor device, respectively, are transferred to the drying chamber. A plurality of individual lifter devices that each raise to a drying position and then descend after the required drying residence to transfer the lot to the traverse conveyor device, a driving motor for operating each of the lifter devices located outside the drying chamber, and each lot to be processed. It has a timer means for adjusting the operation of each of the prime movers in accordance with the required drying residence time of the article, and an opening/closing lid that opens and closes the opening of the drying chamber in conjunction with the lifting and lowering operations of each of the lifter devices, respectively. A large hot air drying device that is characterized by: