JPH08192088A - Drying furnace - Google Patents

Abstract

PURPOSE: To shorten transporting directions and to make sizes smaller and construction simpler by changing the directions of flat planar and rectangular works to be dried transported in a parallel pose so as to have a crossed pose while utilizing the transporting force of transporting conveyors in drying furnaces and by housing these works into the furnaces while reducing the distances between the works. CONSTITUTION: The front side and rear side of a transporting frame 100 are so formed as to be made holdable in a front side wheel unit and rear side wheel unit disposed travellably at guide rails 50. The guide rails 50 in furnace bodies 21, 41 are provided with direction changing parts 55 changeable in the transporting directions toward the X3 direction intersecting with the X2 direction of the transporting direction of respective straight parts 53, 54 between the transfer-in side straight part 53 and transfer-out side straight part 54. Further, the furnace bodies are provided with auxiliary guide rails 56, spacing regulating means 90, branching means 110 and confluent means 120 so that the transporting poses of the works are changed to the transporting poses of other zones Zf, Zp and are regulated to the small set spacings S within the drying zones (furnace bodies 21, 41).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide rail that penetrates a furnace body and is provided with a wheel unit so that the wheel unit can travel, and a transport conveyor formed so that the wheel unit can be moved along the guide rail. And a flat-plate-shaped long object to be dried, which is vertically held by a wheel unit via a transfer frame, is configured to be able to be loaded into and unloaded from the furnace body by driving the transfer conveyor. .

[0002]

2. Description of the Related Art Drying furnaces are often used in various devices and plants. FIG. 8 shows a coating processing apparatus as an example of an apparatus using the water-drying drying oven 20 and the heating / drying oven 40. The pretreatment zone Zf is, for example, a degreasing zone, a first water washing zone, a surface conditioning zone, a chemical conversion zone, a second and a third zone.
It consists of a washing zone. A coating machine (not shown) is arranged in the coating zone Zp. The water-drying drying furnace 20 forms a water-drying drying treatment zone Zw, and the heat-drying furnace 40 forms a heat-drying treatment zone Zh. RK is a loading zone and URK is an unloading zone.

There are a batch type and a continuous type in such a coating processing apparatus. In the batch type, as shown in FIG. 9, the work W is processed into a processing tank TKf by using a transfer means (crane 60C).
It is transported to the (treatment zone) and immersed for a predetermined treatment time Ti for treatment. Therefore, the transport of the processing tank TKf (X)
The size of the direction can be reduced. However, since it is difficult to internally install the crane 60C in the closed type drying oven (20, 40), another conveying means (for example, the chain conveyor 6) is used.
0) must be provided. Therefore, it is necessary to install more than 5 large cranes 60C,
In addition, since another transfer means (chain conveyor 60) must be installed side by side and a transfer mechanism or the like must be provided, the device becomes taller and larger, and the device economy is disadvantageous.

On the other hand, in the continuous type, a kind of transfer means (chain conveyor 60) is used to carry out each processing while continuously transferring the work W to each processing zone Zf, Zw, Zp, Zh. Therefore, it is not necessary to provide the large crane 60C or the like. Therefore, the transport means has a simple structure, a small size,
Only a low cost chain conveyor (60) is needed. However, the length of each processing zone Zf, Zw, Zp, Zh in the X direction is determined by the processing time Tf, Tw, T of each processing zone.
p, Th and the transfer speed Vt by the chain conveyor 60
Therefore, the total length of the device becomes large.

For example, the pretreatment time Tf is 3 minutes, the draining and drying treatment time Tw is 12 minutes, the coating treatment time Tp is 8 minutes, the heat drying treatment time Th is 30 minutes, and the transport speed Vt is 1.
If 0 m / min, the pretreatment zone length Lf is 30 m,
Draining dry treatment zone length Lw is 120 m, coating treatment zone length Lp is 80 m, heat drying treatment zone length Lh is 300 m
Becomes Therefore, realization is very difficult.

Therefore, a mourning type has been proposed / implemented in which the conveying means is a chain conveyor as in the case of the continuous type and each process is a batch type. That is, in FIG. 10, a conveying means including a chain conveyor 60 is provided above the guide rails 50 arranged along each treatment zone (treatment tank TKf etc.), and the wheel unit 70 can be moved on the guide rails 50. Installing. The guide rail 50 and the chain conveyor 60 are arranged so as to penetrate through the drying furnace (20, 40). In addition, the chain conveyor 60
The conveying force applying member 62 is attached to the wheel unit 70, and the conveying force receiving member 84 and the conveying force receiving member 8 are attached to the wheel unit 70.
An engagement separation mechanism 80P that engages and separates 4 with the conveyance force applying member 62 is incorporated. Furthermore, at a predetermined position in each processing zone,
A selection switching unit 90P is provided which is associated with the engagement / separation mechanism 80P and selectively switches the carrying force receiving member 84 to the engaging force providing member 62 between an engageable state and a separable state.

For example, the engaging / separating mechanism 80P is constructed so that the carrying force receiving member 84 is normally erected as shown by the solid line in FIG. Further, the selection switching means 90P is composed of a retractable member and a cylinder device, and an engagement / separation mechanism that advances in the X direction by projecting (advancing) the retractable member (90P) as shown by the chain double-dashed line in FIG. A member (90P) capable of applying a switching external force to 80P and protruding and retracting on the depth side of the paper surface of FIG.
It is configured to remove the switching external force by immersing (retracting). When a switching external force is applied, the engagement separation mechanism 8
0P switches the conveyance force receiving member 84 to a separable state in which the conveyance force receiving member 84 is laid sideways as shown by the chain double-dashed line.

Thus, if the retractable member (90P) is projected as shown by the two-dot chain line before the wheel unit 70 conveyed in the X direction by the chain conveyor 60 reaches a predetermined position, the conveying force receiving member can be obtained. 84 can be laid on its side. Therefore, the carrying force receiving member 84 can be separated from the carrying force applying member 62, and thus the carrying frame 100.
Batch processing in which the (work W) is kept stationary in the processing tank TKf can be performed. The carrying force applying member 62 moves in the X direction.
Incidentally, 103 is a hanging jig.

When the retractable member (90P) is retracted after the lapse of the predetermined processing time, the conveying force receiving member 84 is erected and switched to the engageable state. Therefore, the work W can be transferred to the next processing tank by the transfer force applying member 62 that has been transferred thereafter. As described above, since the mourning plan is a combination of continuous conveyance by the chain conveyor 60 and batch processing, both the continuous type and batch type benefits can be enjoyed.

[0010]

By the way, according to the mourning type, the flat plate-shaped work W has a parallel state in which its surface is parallel to the conveying (X) direction as in the case of the continuous type shown in FIG. Therefore, the wheel unit 70 (conveyance frame 100) must be suspended and held. This is because when the suspension type is held in a crossed state intersecting or orthogonal to the transport (X) direction like the batch type shown in FIG. 9, inconveniences such as increased resistance and occurrence of wobbling of the work W occur.

Thus, when the work W is flat and has a length of, for example, 6 m or more, the mourning die may not be adopted. That is, the production cycle time is, for example, 6 minutes,
If the heat drying treatment time Th is 30 minutes, the heat drying oven 4
At 0, five or more works (objects to be dried) W must be accommodated in series in the X direction. That is, the heating and drying furnace 4
This is because the length of 0 in the X direction becomes 30 m (= 6 m × 5 sheets) or more. Similarly, in the case of the water-drying drying furnace 20, it becomes long. Note that this problem cannot be fundamentally solved even with the U-turn layout shown in FIG. 11 as compared with the case of FIG.

Therefore, it is possible to shorten the heat treatment time Th and the like. If the heat-drying treatment time Th is set to, for example, 10 minutes, it is sufficient to accommodate only two articles (W) to be dried in series, and the length in the X direction can be set to 12 m. However, this idea is difficult to adopt. For example, it causes a problem such as a marked deterioration in coating quality, leading to a fall of the main customer.

An object of the present invention is to provide a drying furnace which is capable of achieving downsizing, simplification of structure, and cost reduction while ensuring that a flat plate-shaped long object to be dried is dried for a desired drying processing time. To do.

[0014]

According to the present invention shown in FIG. 9, a long flat object to be dried which has been conveyed in a parallel state is shown in FIG. 9 while utilizing the conveying force of a chain conveyor in a drying furnace. Similar to the batch type, by changing the direction so as to be in an intersecting state, and by narrowing the mutual interval of the dried objects to be housed, a new configuration capable of significantly shortening the conveying direction is achieved, and the above object is achieved. It is a thing.

That is, according to the present invention, there is provided a guide rail which penetrates the furnace body and is provided so that the wheel unit can travel.
Equipped with a transport conveyor that can move the wheel unit along the guide rails, a flat conveyor-shaped object to be dried, which is suspended and held by the wheel unit via the transport frame, In a drying furnace configured to be driven to be loaded into and unloaded from the furnace body together with the transport frame, a front wheel unit and a rear wheel unit movably provided on the guide rail on the front side and the rear side of the transport frame. A guide rail in the furnace body in which the carrying direction can be changed between the carrying-in side straight part and the carrying-out side straight part so as to intersect the carrying direction locus of each straight part. In addition to providing the changing portion, an auxiliary guide rail having an auxiliary orientation changing portion that is parallel to the orientation changing portion and has a predetermined interval is provided, and the auxiliary guide rail is provided between the loading side linear portion and the auxiliary orientation changing portion. An interval that regulates the interval between the branching means that is formed so that only the side wheel unit can be transferred to the auxiliary guide rail and is movable, and the transport frames that are held between the orientation changing portion and the auxiliary orientation changing portion to the set interval. The present invention is characterized in that a regulating means and a merging means are provided between the unloading side linear portion and the auxiliary guide rail so that the rear wheel unit on the auxiliary guide rail is movable to the unloading side linear portion.

[0016]

In the case of the present invention having the above-mentioned structure, when the carrier frame is carried into the furnace body, the front wheel unit reaches the direction changing portion via the carry-in side linear portion of the guide rail. On the other hand, the rear wheel unit is transferred to the auxiliary direction changing unit by the branching unit.

Here, the direction changing section and the auxiliary direction changing section are arranged in parallel with each other with a predetermined interval, and the front wheel unit is conveyed by the conveying conveyor (for example, a chain conveyor) toward the unloading side linear section. From this, the rear wheel unit is dragged and conveyed through the auxiliary direction changing portion toward the unloading side linear portion. That is, since it can be conveyed in a direction intersecting the direction changing unit and the auxiliary direction changing unit, the conveyance frame, that is, the conveyance mode of the dried object can be changed.

Then, the conveyance frames held on both of the changing portions are regulated by the spacing regulating means to the set spacing. In this way, it is possible to change the direction of multiple transport frames from the transport mode in other zones and to hold them stably at a small set interval, which greatly reduces the length of the furnace body in the transport direction and the drying process for a predetermined time Can be fully done.

After the drying process, the conveying frame is carried out by the cooperation of the space regulating means and the merging means while being restored to its straight line on the carrying-out side.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS.
The front wheel unit 70F (70FF, 7FF, 70FF,
0FB) and the rear wheel unit 70B (70BF,
70BB) so as to be able to hold the guide rail 50 in the furnace body (21, 41), and transfer direction of the straight line portions (53, 54) between the carry-in side straight line portion 53 and the carry-out side straight line portion 54. A direction changing portion 55 that can be changed in a direction (X3 direction) that intersects the direction (X2 direction) is provided, and the auxiliary guide rail 56, the spacing regulating means (80, 90), and the branching means 1 are provided.
10 and a merging means 120 are provided, and a drying zone (furnace body 2
1, 41), the transfer mode of the work (W) is changed from the transfer mode of the other zones (Zf, Zp), and a plurality of works (W) are formed while being restricted to a small set interval S. , The drying direction of the drying zone (21, 41) can be greatly shortened. The work is a flat plate-shaped and long-sized (for example, 6 m) object to be dried W. The flat material W to be dried includes not only a single flat material but also, for example, a large number of block pieces collected into a flat shape as a whole.

The present drying oven comprises a draining oven 20 and a heating / drying oven 40, and each of the drying ovens (20, 40) is incorporated in the coating treatment apparatus shown in FIG. Therefore, first, the overall configuration of the coating processing apparatus will be described.

The coating processing apparatus has a U-turn layout in order to further downsize the apparatus.
It is composed of a pretreatment device 10, drying ovens (20, 40) and a coating device 30 arranged in parallel with the pretreatment device 10, and conveying means (50, 60, 70, 100). In this embodiment, the production cycle time is 6 minutes, the pretreatment time Tf is 3 minutes, the coating treatment time Tp is 8 minutes, the draining and drying time Tw is 12 minutes, and the heating and drying time Th is 30 minutes.

The pretreatment apparatus 10 comprises a degreasing tank 11, a first water washing tank 12, a surface conditioning tank 13, a chemical conversion tank 14, a second water washing tank 15, which are arranged in the conveying direction (X1 direction) of the work W.
The pre-treatment zone Zf is formed by including the third washing tank 16. The draining and drying oven 20 includes a pretreatment device 10 and a coating device 30.
And a furnace body 21 having an inlet 22 and an outlet 23, and forms a draining and drying zone Zw.

The heating / drying furnace 40 is arranged on the downstream side of the coating apparatus 30, and has a furnace body 41 having an inlet 42 and an outlet 43 to form a heating / drying zone Zh.
The coating device 30 has a coating machine (not shown) and forms a coating zone Zp. Each drying oven (20, 40)
The coating device 30 is disposed close to the pretreatment 10 in order to reduce the width of the coating treatment device.

The transfer means includes the guide rail 50, a chain conveyor 60 [first and second chain conveyors (61, 65)] as a transfer conveyor, a wheel unit 70, and a transfer frame 100, and in the loading zone RK. The mounted work (W) is pretreated by a pretreatment device 10, a draining drying oven 20,
Pass the coating device 30 and heating / drying furnace 40, and unload zone UR
It is configured so that it can be transported up to K.

The guide rail 50 has all zones (Zf, Z
w, Zp, Zh), and a series of them through the water-drying drying furnace 20 and the heating / drying furnace 40. The front and rear direction conversion portions of the guide rail 50 on the side of the pretreatment device 10 (the straight portion 51) include:
Front side and rear side bypass parts (52F, 52R) are provided. By using the bypass parts (52F, 52R), the work (W) is described later in the furnace body (21,
41) It is possible to feed in the direction orthogonal to the X1 direction while maintaining the crossed state similar to the internal conveyance. In addition, in FIG. 1, the guide rail 50 is shown by a solid line, and the step is omitted from the drawing. As shown in FIG. 4, the guide rail 50 is formed of a pair of groove-shaped rail portions (51L, 51R) arranged to face each other.

The chain conveyor 60 includes a first chain conveyor 61 which conveys the work (W) at a high speed on the pretreatment zone Zf side and a second chain conveyor 61 which conveys the work (W) at a low speed on the coating zone Zp side. And 65. The first chain conveyor 61 conveys the work (W) at an optimal speed for pretreatment (eg, 10 m / min), and the second chain conveyor 65 conveys the workpiece (W) at an optimal speed for coating (eg, 1 m / min). ) Is used to convey the work (W). In this way, by dividing the chain conveyor 60 into two, the production efficiency is improved as a whole, and the transfer means and the like can be omitted.

A conveyance force applying member (62) 66 is attached to each chain conveyor 61 (65). In addition, in FIG. 1, the first chain conveyor 61 is shown by a dotted line, the second chain conveyor 60 is shown by a one-dot chain line, and a portion overlapping with the guide rail 50 is illustrated by giving priority to the guide rail 50.

In place of the first chain conveyor 61, the wheel units (70F, 70B) are pushed out and fed to the rearward-direction changing portion of the guide rail 50 in the direction of the arrow in FIG. 1 which is orthogonal to the conveying direction (X1 direction). A possible rear direct chain conveyor 59R is provided. Similarly, the front side direction conversion portion of the guide rail 50 is provided with a front side direct feed chain conveyor 59F capable of feeding the wheel units (70F, 70B) in a direction orthogonal to the transport direction (X1 direction). Each direct chain conveyor (59F, 5
9R) push-out / return operation is performed by the first chain conveyor 61.
It is supposed to be done at a higher speed than.

Here, the production cycle time (6 minutes) and each drying time (Tw = 12 minutes, Th = 30)
From the point of view (min), there are two furnace bodies 21 (=
It is only necessary to form 12 ÷ 6) works (W) so that the furnace body 41 of the heating and drying oven 40 can accommodate 5 (= 30 ÷ 6) works (W). The furnace body 21 has the same structure as the furnace body 41 [that is, it can accommodate five works (W)].

As a result, the structure can be further simplified and the cost can be reduced, and the work (W) can be placed in the furnace body 21.
Can be accommodated in an extra amount, so that the amount of preprocessing completed can be withheld at the time of operation interruption such as lunch break. Therefore, it is not necessary to refrain from pre-treating the work (W) before the operation is interrupted, and the production efficiency can be further improved.

As described above, the draining drying oven 20 has the same structure as the heating drying oven 40.
The internal structure of will be described. The guide rail 50 in the draining and drying oven 20 includes a carry-in side straight line portion 53 and a direction changing portion 55.
And an auxiliary guide rail 56 (auxiliary orientation changing portion 57, auxiliary orientation linear portion 58) and an unloading side linear portion 54. The carry-in side linear portion 53 and the carry-out side linear portion 54 are
They are arranged parallel to the transport direction (X2 direction) and are selected so that a predetermined number (five in this embodiment) of transport frames 100 can be packed at a set interval S and housed.

The direction changing unit 55 sets the carrying direction between the carry-in side straight line portion 53 and the carry-out side straight line portion 54 to each straight line portion (5).
3, 54) crossing the conveyance direction locus (X3 direction)
It is formed to be changeable. Auxiliary guide rail 56
Has an auxiliary orientation changing portion 57 that is parallel to the orientation changing portion 55 and has a predetermined distance D, and connects the downstream end of the auxiliary orientation changing portion 57 and the upstream end of the carry-out side linear portion 54. It has an auxiliary straight line portion 58 that operates.

As shown in FIG. 2, the wheel unit 70 is composed of a front wheel unit 70F and a rear wheel unit 70B, and each wheel unit (70
F, 70B) is formed so that the front side and the rear side of the transport frame 100 can be held. By holding two points, the transport frame 100 is stably held.

Here, the front side means the side that becomes the head in the carrying direction when the wheel unit 70 is carried along the guide rail 50, and the rear side means the side opposite to the head. To do. In this embodiment, each wheel unit 70
The F (70B) further facilitates the simplification of the structure and the stable holding of the conveyance frame 100, and also allows the first and second wheel portions 70 to follow the sharp bend of the guide rail 50.
It is formed of FF and 70FB (70BF and 70BB). Both wheel parts 70FF, 70FB (70BF, 70B
B) is the hanging jig 79 and the connecting member 102F (102
The posture is changeable via B). First and second wheel portions 70F of each wheel unit 70F (70B)
Since F and 70FB (70BF and 70BB) have the same structure, the first and second wheel portions 70FF and 70FB of the first wheel unit 70F will be described.

First and second wheel portions 70FF, 70FB
As shown in FIGS. 4 and 5, each is composed of a main body 71, wheels 72, horizontal wheels 73, and the like. Body 71
A plurality of (four) wheels 72 are provided on the upper part of the guide rail 5
It is mounted so that it can move freely by rolling in the inner groove of the both groove-shaped rail portions (51L, 51R) of 0, and the horizontal wheel 73 for preventing wheel removal is rotatable between both rail portions (51L, 51R). Is attached to. A holding hole 76 for connecting the hanging jig 79 is formed in the lower portion of the main body 71.

As shown in FIGS. 2 and 3, the transport frame 100 is composed of a frame body 101, a mounting member 105 and the like. The frame body 101 is formed in a long size so as to have the same length as the work (W). This frame body 1
01 Suspension holding members (103F, 103B) are provided on the front side and the rear side of the guide rail 50, respectively.
Are mounted so as to have the same spacing as the spacing D between the direction changing portion 55 and the auxiliary direction changing portion 57, and the upper end portions of the suspension holding members (103F, 103B) are wheel units (70F, 70B). Side connecting member (102F, 102
It is rotatably connected to B) via a thrust bearing (104F or the like). A mounting member 105 is mounted on the lower surface of the frame body 101, and the mounting member 10
5, a work (W) is suspended and held via a plurality of (three) holding jigs 106 so as to extend in the horizontal direction.

The branching means 110 is composed of the guide rail 5
Only the rear wheel unit 70B is formed between the carry-in linear portion 53 of 0 and the auxiliary direction changing portion 57 so as to be transferable to the auxiliary guide rail 56. In this embodiment, the branching means 110 has a rotating flat rail 111 as shown in FIG.
And a cylinder device 112, the front side of the wheel unit 70 (7
It is configured that the rear side (70B) is transferred to the auxiliary guide rail 57 and moved by utilizing the fact that 0F) is pulled by the direction changing portion 55.

The rotatable flat rail 111 is rotatably disposed between the carry-in side linear portion 53 and the auxiliary direction changing portion 57 via the support shaft 113, and is connected to the cylinder device 112. By driving the cylinder device 112, the rotary flat rail 111 can be positioned and held from the standby position shown by the solid line in FIG. 6 to the switching position shown by the two-dot chain line. Therefore, when the rotary flat rail 111 is positioned and held at the switching position after passing through the front wheel unit 70F, the rear wheel unit 70B moves to the rotary flat rail 11 concerned.
It is guided by 1 and transferred to the auxiliary direction changing portion 57 to be moved in the X31 direction parallel to the X3 direction.

Further, the space regulating means is constituted by the respective conveying frames 100 held between the direction changing section 55 and the auxiliary direction changing section 57.
It is a means for regulating the interval between them to the set interval S. In this embodiment, the engagement separation mechanism 80 and the selection switching means 9 shown in FIG.
The interval regulating means is formed from 0 and 0.

The engaging / separating mechanism 80 is provided on the front and rear wheel units (70F, 70R) and includes a driven lever 81, a connecting lever 83, and a carrying force receiving member 84. The member 84 is configured to be protruded from the upper portion of the main body 71 by a predetermined length so that the member 84 can be engaged with the conveyance force applying member 62.

On the other hand, the selection switching means 90 includes a stopper 92.
Body 91 having a cylinder, a cylinder device 95, and a stopper 9
8, the engaging and separating mechanism 80 (conveying force receiving mechanism) that advances in the X2 direction by projecting the main body 91 into a stop operation state as shown in FIG. 5 before each processing time (for example, draining drying time Tw) has elapsed. The switching external force is applied to the member 84) and the switching external force is removed by retracting the main body 91 to the depth side of the plane of FIG. When the switching external force is applied, the engagement / separation mechanism 80 switches the transport force receiving member 84 to the separable state as indicated by the chain double-dashed line. That is, the wheel units (70F, 70B) can be stopped by setting the selection switching unit 90 in the stop operation state, and the wheel units (70F, 70B) can be conveyed as they are by setting the release state.

More specifically, the driven lever 81 of the engagement / separation mechanism 80 has a spindle 74 attached to the main body 71 of the first wheel portion (70FF, 70BF) of each wheel unit (70F, 70B).
It is rotatably attached via. The carrying force receiving member 84 is mounted on the main body 71 so as to be movable in the vertical direction. The connecting lever 83 connects the conveying force receiving member 84 and the rear end portion of the driven lever 83. Driven lever 83
Is normally held at the position shown by the solid line in FIG. 5 due to the balance of the weight moment, and when the driven surface 82 thereof engages with the stop engagement surface 93 of the stopper 92 of the main body 91 while advancing in the X2 direction. Is rotated to the position indicated by the chain double-dashed line. As a result, the carrying force receiving member 84 descends from the position shown by the solid line in the figure to the position shown by the chain double-dashed line, and becomes in a separable state. An anti-back 77 is attached to the rear portion of the main body 71 via a support shaft 75 so as to be rotatable in the front direction and not rotatable in the rear direction. As a result, it is possible to prevent the carrying force receiving member 84 from moving too far ahead of the carrying force applying member 62 (66) and releasing the engaged state.

The main body 91 of the selection switching means 90 is
A stopper 92 is provided, and a stop guide surface 93 is formed on the upper surface of the stopper 92. Also,
In the cylinder device 95, the rod 96 has a horizontal direction (see FIG. 5).
It is provided so as to be capable of projecting and retracting in a direction orthogonal to the middle paper surface), and a main body 91 is attached to the tip end portion thereof. The stopper 98 is the stopper 92 of the main body 91.
And the second wheel portions (70FB, 7FB) of the front and rear wheel units (70F, 70B).
0BB) is provided so as to project rearward from the rear part.

First wheel unit (70F, 70B)
However, for example, the selection switching means 90 in the furnace body (21, 41)
The furnace body (2
1, 41), the stopper 98 of the stopped wheel unit (70F, 70B) and the driven surface 82 of the driven lever 81 of the wheel unit (70F, 70B) that has been conveyed afterwards. Engaging and carrying force receiving member 8
4 is released from the engaging state of the conveying force applying member 62,
The rear wheel unit (70F, 70B) can be stopped with the set interval S provided to the front wheel unit (70F, 70B). Furnace body (2
1, 41) wheel units (70F,
70B) can be stopped with the set interval S similarly.

The selection switching means 90 is, as shown in FIG. 1, each tank (11, 12, 13, 1) in the pretreatment zone Zf.
It is also arranged at the position corresponding to 4, 15, 16),
By setting the stop operation state in accordance with the processing time of each tank (11 etc.), the work (W) is transferred to each tank (11) in cooperation with the conveying force imparting member 62 on the first chain conveyor 61 side.
Etc.) The batch processing can be performed while still standing. The main body 91 of the selection switching means 90 may be rotated on a horizontal plane so as to project and retract. With such a configuration, the movement amount of the rod 96 of the cylinder device 95 can be greatly shortened to further reduce the device size and cost.

As shown in FIG. 7, the merging means 120 is provided between the carry-out side straight line portion 54 of the guide rail 50 and the auxiliary straight line portion 58 of the auxiliary guide rail 56 and the rear wheel unit 70B on the auxiliary guide rail 56. The unloading side straight section 54
It is formed to be movable. In this embodiment, the merging means 120 includes a rotating flat rail 121, a spring 122, and a support shaft 1.
23, the front side (70F) of the wheel unit 70 is pulled to the carry-out side straight line portion 54 by the carrying force of the second chain conveyor 65, and the rear side (70B) of the auxiliary straight line portion 58 (transport direction) is used. It is configured to transfer from the (X21 direction) to the carry-out side linear portion 54.

The rotatable flat rail 121 is rotatably disposed between the carry-out side straight portion 54 and the auxiliary guide rail 56 via the support shaft 123, and is normally shown by a solid line in FIG. It is biased toward the position shown. When the rear wheel unit 70B passes while resisting the biasing force of the spring 122, the rotary flat rail 121 is retracted to the position shown by the chain double-dashed line in the figure.

Next, the operation of this embodiment will be described. The work (W) suspended by the front and rear wheel units (70F, 70B) via the transport frame 100 in the loading zone RK is transported by the transport means (first chain conveyor 6).
1, is conveyed in the X1 direction by the conveying force imparting member 62). Then, in the degreasing tank 11 of the pretreatment device 10, the selection switching means 90 in the stop operation state is stopped and degreasing treatment is performed for a predetermined treatment time. Immediately before the elapse of a predetermined time, the selection switching means 90 is released and again conveyed in the X1 direction by the conveying means (61, 62). The following tanks (12, etc.) are also subjected to batch processing while standing still for a predetermined processing time.

After passing through the pretreatment zone Zf, the front side of the downstream direction conversion section is supported by the rear side bypass section 52R and pushed out in the direction of the arrow in FIG. It is transported to just before 22. Then, each wheel unit (7
The transport force receiving member 84 on the (0F, 70B) side engages with the transport force applying member 62 provided on the first chain conveyor 61 at a predetermined timing, and is carried into the furnace body 21. In this way, the wheel units (70F, 70B) are connected to the first chain conveyor 6 by the direct chain conveyor 59R.
Since it is conveyed to the draining drying furnace 20 side earlier than 1, the time adjustment can be performed and the conveyance can be performed substantially continuously.

When the carrier frame 100 is carried into the furnace body 21, the front wheel unit 70F reaches the direction changing portion 55 via the carry-in side linear portion 53 of the guide rail 50. On the other hand, the rear wheel unit 70B is transferred to the auxiliary direction changing unit 57 by the branching unit 120.

Here, the direction changing portion 55 and the auxiliary direction changing portion 57 are arranged in parallel with each other with a predetermined space S, and the front wheel unit 70F is moved toward the carry-out side linear portion 54 by the first chain conveyor 61. Since it is conveyed, the rear wheel unit 70B is dragged to the auxiliary direction changing portion 57.
Are conveyed in the X31 direction toward the unloading-side linear portion 54. In other words, since it is possible to convey in the state where it intersects the direction changing unit 55 and the auxiliary direction changing unit 57, the conveyance frame 100, that is, the conveyance mode of the work (W) can be changed. Then, the transport frame 1 held on both the changing parts (55, 57)
The position of 00 is regulated by the gap regulating means (80, 90) and stopped.

Thus, the plurality of transport frames 100 can be stably held in a state in which they are turned to other zones (Zf, Zp) and packed in a small set interval S, so that the furnace body 21 can be shortened for a predetermined period of time. Can be sufficiently dried. After the drying process, the transport frame 100 is unloaded to the unloading-side linear portion 54 while the figure is restored by the cooperation of the interval regulating means (80, 90) and the merging means 120.

The work (W) carried out from the draining and drying furnace 20 is carried by the second chain conveyor 65 in a condition that its carrying state is parallel to the carrying direction, and is carried into the coating apparatus 30 for coating processing. . After the coating process, the work (W) is carried into the furnace body 41 of the heating and drying furnace 40, and the carrying state is changed to the crossing state in the furnace body 41, and the work (W) is regulated and held at the small set interval S. In the furnace body 41, the work (W) is dried for a predetermined length of time (30 minutes). The work (W) carried out from the heating / drying furnace 40 is carried to the unloading zone URK by the first chain conveyor 61, and is removed from the carrying frame 100 in the unloading zone URK.

Therefore, according to this embodiment, the transport frame 1
Front wheel unit 70F (70FF, 70FF, 70FF,
70FB) and rear wheel unit 70B (70F)
(F, 70BB) so that it can be held respectively, and the carrying-in side linear portion 5 is provided on the guide rail 50 in the furnace body (21, 41).
3 and the carry-out side straight line portion 54, the carrying direction is set to the straight line portion (5
3, 54) and the conveying direction (X2 direction) intersecting direction (X
The direction changing portion 55 that can be changed is provided, and the auxiliary guide rail 56, the branching means 110, the space regulating means (80, 90), and the merging means 120 are provided.
In the drying zone (21, 41), a plurality of workpieces (W) are changed while changing the conveying manner of the workpiece (object to be dried W) and the conveying manner of the other zones (Zf, Zp) and restricting to a small set interval S. Since it is formed so that it can be held, each furnace body (21, 4
The length in 1) in the carrying direction is a length obtained by adding the accommodation allowance to the length of the work (W), and the length can be greatly shortened.
Therefore, it is possible to reduce the size, simplify the structure, and reduce the cost while ensuring that the work (W) is dried for a desired drying time.

Incidentally, as shown in FIG. 12, a plurality of (four)
It is also possible to change the posture of the material to be dried (W) by providing the transfer mechanism 200 and the two Y-direction feed mechanisms 201, but this configuration not only causes a significant increase in cost,
The device width (vertical dimension in the figure) becomes large and the device becomes large. That is, the effectiveness of the present invention using the chain conveyor 60 can be clearly understood.

Further, since the draining drying oven 20 and the heating drying oven 40 have the same structure, the structure can be further simplified and the cost can be reduced. The drainer 20 can store a plurality of (three) extra works (W), and can hold the pretreatment completion amount when the operation is interrupted such as lunch break. Thereby, it is not necessary to refrain from pre-treating the work (W) before the operation is interrupted, and the production efficiency can be further improved.

Further, since the chain conveyor 60 is divided into the first and second chain conveyors (61, 65), it is necessary to take sufficient measures even if the pretreatment time Tf and the coating time Tp change. Therefore, the adaptability can be expanded. In addition, the coating device 30 has a water-drying oven 20.
The work (W) can be supplied more smoothly from the side for coating processing.

Further, the wheel unit 70 is formed of front and rear wheel units (70F, 70B), and the wheel units (70F, 70B) are respectively provided with first and second wheel portions [70FF (70BF), 70FB].
(70BB)], the structure can be further simplified and the transport frame 100 [object to be dried (W)] can be stably held.

Further, the suspension holding members (103F, 103B) mounted on the front and rear wheel units (70F, 70B) on the front and rear sides of the transport frame 100, respectively.
Are rotatably connected, each wheel unit (7
(0F, 70B) can be smoothly changed while following the sharp bend of the guide rail 50 while being conveyed.

Further, since the branching means 120 is formed so as to transfer the rear wheel unit 70B to the auxiliary guide rail 56 by utilizing the carrying force of the chain conveyor 60, the structure is further simplified. be able to.

Furthermore, since the interval separating means is constructed by the engagement separating mechanism 80 and the selection switching means 90, further simplification can be achieved and more stable holding can be achieved. The selection switching means 90, the main body 9 having a stopper 92
Since 1 is projected and retracted in the horizontal direction to engage and disengage the conveying force receiving member 84 and the conveying force applying member 62 (66), it is possible to effectively utilize the empty space. Therefore, it is possible to further reduce the size of the device and reduce the cost. In addition, when the main body 91 is configured to be projected and retracted by rotating the main body 91 on a horizontal plane, it is possible to further reduce the apparatus size and cost.

Furthermore, since the merging means 120 is formed so as to move the rear wheel unit 70B on the auxiliary guide rail 56 to the unloading side linear portion 54 by utilizing the conveying force of the chain conveyor 60, the structure is further improved. Can be simplified.

[0064]

According to the present invention, the front side and the rear side of the carrier frame are formed so as to be held by each of the front wheel unit and the rear wheel unit provided on the guide rail so as to be able to travel, and the inside of the furnace body can be held. The guide rail is provided with an orientation changing section that can change the carrying direction between the carry-in side straight part and the carry-out side straight part so as to intersect the carrying direction of each straight part, and the auxiliary guide rail, the branching means, and the gap. By providing a regulation means and a confluence means, a flat plate-shaped long-sized object to be dried can be changed from a conveyance state in another zone to a small set interval and a plurality of objects to be dried can be regulated at a small setting interval. Since it is formed so as to be able to be held, the furnace body can be significantly shortened. Therefore, it is possible to reduce the size, simplify the structure, and reduce the cost while ensuring that the material to be dried is dried for a desired drying time.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram for explaining an embodiment of the present invention.

FIG. 2 is a side view for explaining the positional relationship among the guide rails, the chain conveyor, the wheel units, and the distance regulating means.

FIG. 3 is a side view for explaining the positional relationship among the guide rails, the conveyance frame, and the object to be dried.

FIG. 4 is a diagram for explaining the positional relationship between the guide rail and the wheel unit, similarly.

FIG. 5 is a diagram for explaining the engagement separating operation between the engagement separating mechanism forming the interval regulating means and the selection switching means, similarly.

FIG. 6 is likewise a diagram for explaining a branching means.

FIG. 7 is a diagram for explaining a merging unit.

FIG. 8 is a diagram for explaining a conventional configuration of a coating processing apparatus.

FIG. 9 is a diagram showing how the material to be dried is conveyed between the pretreatment tanks using a crane.

FIG. 10 is also a diagram for explaining the engagement separation operation between the engagement separation mechanism and the selection switching means.

FIG. 11 is a diagram for explaining a coating processing device laid out in the U-turn system in the same manner.

FIG. 12 is also a diagram for explaining a coating processing apparatus that includes four transfer mechanisms and two Y-direction feed mechanisms and that changes the conveyance mode of the material to be dried in the furnace body.

[Explanation of symbols]

 20 Draining Drying Furnace 30 Coating Equipment 40 Heating Drying Furnace 50 Guide Rail 53 Carry-In Side Straight Line 54 Carry-Out Side Straight Line 55 Direction Change Section 56 Auxiliary Guide Rail 57 Auxiliary Direction Change Section 58 Auxiliary Straight Line 59F, 59R Direct Feed Chain Conveyor 60 Chain Conveyor (Conveyor Conveyor) 61 First Chain Conveyor 62 Conveying Force Providing Member 65 Second Chain Conveyor 66 Conveying Force Providing Member 70 Wheel Unit 70F Front Wheel Unit 70B Rear Wheel Unit 77 Anti-Back 80 Engage Separation Mechanism 84 Conveying Force Receiving member 90 Selection switching means 98 Stopper 100 Conveying frame 110 Branching means 120 Merging means

Claims (1)

[Claims] 1. A transfer frame comprising: a guide rail that penetrates through the furnace body and is provided so that the wheel unit can travel; and a transfer conveyor that is formed so that the wheel unit can be moved along the guide rail. In the drying furnace configured to be capable of loading and unloading a flat and long object to be dried, which is hung and held by a wheel unit via a transport conveyor, into and out of the furnace body together with the transport frame, The front side and the rear side are formed so as to be respectively held by a front wheel unit and a rear wheel unit movably provided on the guide rail, and the loading straight line portion and the unloading straight line are formed on the guide rail in the furnace body. A direction changing unit that can change the conveying direction between the unit and the unit so as to intersect the conveying direction locus of each linear unit is provided, and the direction changing unit is provided in parallel with the direction changing unit at a predetermined interval. An auxiliary guide rail having an auxiliary orientation changing portion is provided, and a branching means formed so that only the rear wheel unit can be transferred to the auxiliary guide rail between the carrying-in linear portion and the auxiliary orientation changing portion, and the orientation changing portion. And a space regulating means for regulating the space between the transport frames held between the auxiliary direction changing portion and the auxiliary direction changing part to a set space,
A drying furnace, comprising: a merging means formed between the unloading side linear portion and the auxiliary guide rail so that the rear wheel unit on the auxiliary guide rail is movable to the unloading side linear portion.