JPH06289A - Front door for solvent recovery type drier - Google Patents

Abstract

PURPOSE:To provide the front door of a solvent recovery type drier surely sealing an insertion port connected to the inside of a rotary drum, releasing the internal pressure of the rotary drum with a simple structure, and facilitating the opening/closing actions. CONSTITUTION:A latch 33 provided on one side of a door plate 2 covering an insertion port 1a opened on a front plate 1 and connected to the inside of a rotary drum 10 is coupled with a fixing plate fixed to the front plate 1 at a gap S, and the door plate 2 can be moved within the range of the gap S. During the drying operation when the inside of the rotary drum 10 has negative pressure, a circular packing 4 on the periphery of the door plate 2 is pressed to the front plate 1 by the suction of the negative pressure, and the insertion port 1a is sealed. When the internal pressure of the rotary drum 10 rises due to the ignition and explosion of a gasified solvent, the door plate 2 pressed by the internal pressure is moved in the opening direction within the range of the gap S, and the internal pressure is released via the gap S generated between the circular packing 4 and the front plate 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solvent recovery type drying in which a rotary drum for storing an object to be dried which has been washed and deliquored with a petroleum solvent is placed under a negative pressure and the solvent is dried while recovering the solvent. Regarding the structure of the front door in the machine.

[0002]

2. Description of the Related Art When drying a washing product such as clothes washed with a petroleum-based solvent, the solvent that is vaporized and released from the substance to be dried during the official drying process is removed by a liquid removal process after the washing. A solvent recovery type in which a circulating air passage that contains a material to be dried and rotates around a horizontal axis is formed in the middle, and a ventilation fan, a condenser, and a heater are arranged inside the circulating air passage. A dryer is used.

In the operation of this type of dryer, the circulating air blown by a blower fan is heated by a heater and introduced into a rotary drum to evaporate and evaporate the solvent contained in the material to be dried inside the rotary drum. It is carried out, and is condensed and liquefied by contact with the condenser to be collected, and the circulating air cooled by this condensation is reheated by the heater and introduced into the rotary drum.

In such a drying operation, it is important that the drying is performed safely without causing an explosion accident due to the ignition of the solvent. Conventionally, the temperature of the circulating air flowing inside the circulating air passage is detected, In order to maintain this detected temperature at a predetermined target temperature, heating temperature control in the heater is generally performed, while the air blowing in the circulation air passage is disclosed, for example, as disclosed in JP-A-62-224398. A communication port to the outside air is provided immediately after the fan, and the heater and the rotary drum located on the downstream side of the communication port are placed under negative pressure so that the solvent evaporates and vaporizes in a low oxygen state to prevent ignition or explosion. A solvent recovery type dryer designed to prevent generation has been put into practical use.

[0005]

In this type of dryer, the front plate of the outer housing that covers the front surface of the rotary drum is provided with an inlet for the material to be dried which is connected to the inside of the rotary drum. A front door is provided to close the inlet during operation. In this front door, a door plate that is opened and closed around a hinge axis on one side is attached to the front plate, and a latch provided on the other side of the door plate is locked to a fixing member fixed to the front plate to insert the door. It is common that the mouth is closed.

However, in the solvent recovery type dryer configured such that the inside of the rotary drum becomes negative pressure during the drying operation as described above, the conventional front door may break the negative pressure inside the rotary drum. To prevent this, use a door plate that has a sealing member (packing) on its periphery, and press this door plate firmly against the front plate to obtain a closed state, while the rotating drum explosively rises due to the ignition of the vaporized solvent. In order to release the internal pressure of the door, a complicated structure with an internal pressure release mechanism that separates the door plate from the front plate in response to the application of a predetermined internal pressure is adopted, which takes time and effort for opening and closing, and also increases the cost. There were difficulties.

On the other hand, when opening the front door, it is necessary to remove the latch from the fixing member, and many front doors are provided with a rotary handle as an operating means for surely performing this operation. It is used. In this type of front door, the latch is rotated by the operation of the handle to be separated from the fixing member, and the opening operation is performed by pulling the door plate while holding the handle. There is a drawback that a series of closing operations are required to rotate the latch by the operation of the handle, press the door plate against the front plate in this state, and then release the handle to engage the latch with the fixing member.

The present invention has been made in view of the above circumstances, and realizes a reliable closed closure of an inlet connected to the inside of a rotary drum with a simple structure, and a solvent recovery dryer which is easy to open and close. The purpose is to provide a front door.

[0009]

A front door of a solvent recovery type dryer according to a first aspect of the present invention is opened in a front plate of an outer housing of a rotary drum which has a negative pressure during a drying operation, and the rotary drum is opened. A door plate is attached to the inlet of the article to be dried connected to the inside of the door so as to be openable and closable around a hinge shaft on one side thereof, and a latch provided on the other side of the door plate is fixed to the front plate. In the front door of the solvent recovery type dryer, in which the sealing member is pressed against the periphery of the charging port to hermetically close the charging port, the locking of the both is provided between the latch and the fixing member. Sometimes, a gap is provided to allow a predetermined amount of opening operation of the door plate, and the closing of the inlet is hermetically closed by attracting the door plate when the negative pressure is generated.

The front door of the solvent recovery type drier according to the second aspect of the present invention is opened to the front plate of the outer housing of the rotary drum, which becomes negative pressure during the drying operation, and is connected to the inside of the rotary drum. A door plate is attached to the inlet of the dried product so as to be openable and closable around the hinge shaft on one side thereof, and a latch provided on the other side of the door plate is locked to a fixing member fixed to the front plate, In a front door of a solvent recovery type dryer that presses a sealing member against the periphery of the charging port to hermetically close the charging port, the latch is disengaged from the fixing member by rotating about one axis. The rotation position of the latch is separated from the fixing member according to the separation of the biasing spring that biases the latch in the locking direction and the front plate when the door plate is opened. Restraining means for restraining the front plate and the front surface when the door plate is closed. Depending on the proximity of, but comprising a canceling means for canceling the restraint of the latch by the restraining means.

The front door of the solvent recovery type drier according to the third aspect of the present invention is opened to the front plate of the outer housing of the rotary drum, which becomes negative pressure during the drying operation, and is connected to the inside of the rotary drum. A door plate is attached to the inlet of the dried product so as to be openable and closable around the hinge shaft on one side, and a latch provided on the other side of the door plate is locked to a fixing member fixed to the front plate, By pressing the sealing member on the periphery of the charging port,
In the front door of the solvent recovery type dryer that hermetically closes the charging port, the fixing member is provided so as to be separable from the front plate so that the door plate can be opened to a predetermined size in a state where the latch is locked to the fixing member. The closing of the inlet is hermetically closed by attracting the door plate when the negative pressure is generated.

[0012]

According to the first aspect of the present invention, a gap is provided between the latch and the fixing member in a locked state between the latch and the fixing member, and the door plate is attracted by the negative pressure inside the rotary drum during the drying operation.
While the sealing member is pressed against the periphery of the charging port to achieve the hermetical closing, when the internal pressure of the rotating drum rises due to the ignition of the vaporized solvent, the action of this internal pressure causes the door plate to move within the range of the gap. The opening operation is performed, the pressing of the sealing member is weakened, and the internal pressure is released.

Further, in the second aspect of the present invention, when the front door is opened, the latch is rotated by the operation of the handle, and then the door plate is separated from the front plate, whereby the latching means operates. When the turning position is restrained as it is and the front door is closed after that, the restraint is released by the operation of the releasing means by bringing the door plate close to the front plate, and the latch is biased by the biasing force of the biasing spring. It returns to the locking position and the locking to the fixed member is realized.

Further, in the third aspect of the present invention, the fixing member is slid in the front-rear direction while the latch and the fixing member are in the locked state, so that the door plate can be separated from the front plate by a predetermined dimension. When the internal pressure of the rotary drum rises due to the ignition of the vaporized solvent, the door plate is opened within the range of the predetermined dimension by the action of this internal pressure, the pressing of the sealing member is released, and the internal pressure is released. .

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is an external perspective view of a solvent recovery type dryer having a front door according to the first aspect of the present invention, and FIG. 2 is a lateral cross-sectional view showing a part of it in an enlarged manner.

In the figure, reference numeral 1 is a front plate that covers the front surface of the outer housing of the solvent recovery type dryer. As shown in FIG.
As shown in FIG. 3, the inlet 1a of the material to be dried connected to the inside of the rotary drum 10 is opened, and the door plate 2 covering the entire surface of the inlet 1a is attached to the hinge shaft 2a on one side thereof so as to be openable and closable. The opening / closing operation of the door plate 2 is performed by the operation unit 3 provided on the opposite side of the hinge shaft 2a.
In addition, an annular packing 4 as a sealing member is provided on the periphery of the door plate 2.
Have been lapped around.

The operation section 3 includes a substrate 30 fixed to the door plate 2, a handle 31 projecting from the front side of the substrate 30, a push button 32 arranged in the vicinity of the handle 31, And a latch 33 provided on the back surface side of the substrate 30. Latch 33 is substrate 30
It is urged by a urging means (not shown) built into the door plate 2 so as to project to the outside of the door plate 2. Normally, as shown in FIG. 2, it is at a position projecting from the side edge of the substrate 30 by a predetermined length. When the push button 32 is pressed, the substrate
In conjunction with a retreat mechanism incorporated in 30, the retreat operation is performed against the bias. A fixing plate 5 is fixed on the front plate 1 of the operation unit 3 adjacent to the substrate 30.
As shown in FIG. 2, the latch 33 protruding from the back side penetrates into the fixed plate 5 on the back side and engages with the fixed plate 5.

In the front door constructed as described above, when the handle 31 is held and the push button 32 is pressed in the closed state shown in FIG. 2, the latch 33 retreats as described above, and the fixed plate 5 and Since the engagement is released, the input port 1a can be opened by pulling the handle 31 toward you and rotating the door plate 2 around the hinge shaft 2a in this state.

On the other hand, when closing the door plate 2 in the open state, it is sufficient to press an appropriate portion of the door plate 2 and rotate the door plate 2 around the hinge shaft 2a. At this time,
The latch 33 in the advanced state hits the edge of the fixing member 5,
As shown in FIG. 2, the abutment portion of the latch 33 is a tapered surface whose thickness decreases toward the tip, and the latch 33 retreats along with the abutment of the fixed plate 5, and the backside of the fixed plate 5 It is possible to enter, and after this entry, an advancing operation is performed, and engagement with the fixing member 5 as shown in FIG. 2 is realized.

In such a closed state, an appropriate gap S as shown in FIG. 2 is secured between the fixing member 5 and the latch 33, and the door plate 2 has a gap S within the range. Movement in the opening direction is allowed. Further, the annular packing 4 on the peripheral edge of the door plate 2 is in contact with the front plate 1a on the peripheral edge of the insertion opening 1a, and the door plate 2 can be operated in the opening direction while the annular packing 4 is crushed.

That is, the door plate 2 can be slightly moved in the opening / closing direction in the closed state, and this motion is caused by the pressure difference between the inside and the outside of the door plate 2. Therefore, during the normal dry operation, the door plate 2 is attracted to the front plate 1 by the negative pressure generated in the rotary drum 10, and the annular packing 4 is crushed to move slightly in the opening direction. By doing so, while the inlet 1a is securely sealed and closed,
When the internal pressure of the rotary drum 10 rises due to the ignition and explosion of the vaporized solvent, the door plate 2 performs the opening operation until the latch 33 collides with the fixing member 5, and at this time, the annular packing 4 and the front plate 1 are separated from each other. The internal pressure is released without difficulty through a gap generated therebetween.

FIG. 3 is an external perspective view of a solvent recovery type dryer having a front door according to the second aspect of the present invention, and FIG. 4 is a lateral cross-sectional view showing a part of the dryer.

Similarly to the front door according to the first aspect of the invention shown in FIGS. 1 and 2, the front door according to the second aspect of the present invention is provided with a door plate 2 for covering the entire surface of the inlet 1a on the front faceplate 1 of the outer housing.
The hinge plate 2a is attached to one side of the hinge shaft 2a so as to be openable and closable, and the operation of opening and closing the door plate 2 is performed by the operation unit 3 provided on the opposite side of the hinge shaft 2a. The configuration is different.

FIG. 5 is an exploded perspective view of the operating portion 3, and FIGS. 6 and 7 are front perspective views of the operating portion 3. As shown in these figures, the operation portion 3 is provided with a substrate 34 fixed to the other side of the door plate 2.
And a handle 35 rotatably supported on the front surface side of the substrate 34 about a horizontal axis, and a latch 36 integrally fixed to the pivot axis of the handle 35 on the back surface side of the substrate 34. The latch 36 generated by the operation of 35 is rotated.

As shown in FIG. 5, the latch 36 is provided with a locking hole 36b penetrating the handle 35 on the front and back at a position separated from the fixed position with the pivot of the handle 35, and near the end on the same side. Front plate 1
Is provided with a spring hooking protrusion 36a projecting toward the front side of the front plate 1, and the tensioning spring 12 is provided between the spring hooking protrusion 36a and the spring hooking protrusion 11 protruding from the front plate 1.
12 is urged to shrink. That is, when the operating force is not applied to the handle 35, the latch 36 is urged in one direction by the spring force of the tension spring 12 and is in the rotation position shown in FIG. 6, and the lower end of the latch 36 has the front plate 1 Fixing member 5 fixed to
It will be in a state of being engaged with, but depending on the rotation operation of the handle 35,
Rotating against the spring force of the tension spring 12, as shown in FIG.
In a plan view, the fixed plate 5 is detached.

Further, as shown in FIGS. 6 and 7, a restraint plate 37 is arranged on one side of the latch 36 on the back side of the substrate 34.
As shown in FIG. 5, the restraint plate 37 is biased in a direction away from the substrate 34 by a pressing spring 37b interposed between the restraint plate 37 and the back surface of the substrate 34. In addition, a restraining protrusion 37a provided so as to project toward the front plate 1 is provided. To fix the restraint plate 37, the protruding position of the restraint protrusion 37a
The locking hole 36b is rotated by the rotation of the latch 36 accompanying the rotation operation of 35.
It is set so as to match the movement locus traced by.

On the other hand, on the surface of the front plate 1, there is provided a release projection 13 at a position aligned with the arrangement position of the restraint plate 37. The release projection 13 is provided on the door plate 2 as shown in FIG. At the time of closing, a part of the constraining plate 37 is pressed so that the constraining plate 37 is moved against the biasing force of the pressing spring 37b.

In the front door constructed as described above, in the closed state shown in FIG. 4, the handle 35 is gripped, and as shown in FIG. In this state, pull the handle 35 toward you and hinge shaft 2a
The insertion port 1a can be opened by rotating the door plate 2 around. As the door plate 2 is detached from the front plate 1 by this opening, the pressing of the restraint plate 37 by the release projection 13 projecting from the front plate 1 is removed, and the restraint plate 37 presses the spring 37b. It moves in a direction away from the substrate 34 by the urging force of the restraint protrusion 3 as shown in FIG.
The 7a engages with the locking hole 36b aligned with the disposition position of the latch 7a to restrict the rotation of the latch 36, and the latch 36 and the handle 35 are held in the rotated position when opened.

On the other hand, when closing the door plate 2 in the open state, it is sufficient to press an appropriate portion of the door plate 2 and rotate the door plate 2 around the hinge shaft 2a. At this time,
Since the latch 36 is restrained in the rotating position when opened,
While reaching the back surface of the fixed plate 5 without colliding with the fixed plate 5, the release projection is caused by the proximity of the door plate 2 to the front plate 1.
When 13 collides with the restraint member 37, the restraint member 37 causes the restraint member 37 to move.
As a result of being pressed in the direction toward
As shown in FIG.
The latch 36 automatically returns to the rotational position when closed, and the latch 36 penetrates into the back side of the fixed plate 5 to be engaged with the fixed plate 5.

In this closed state, a gap is secured between the fixed plate 5 and the latch 36 as shown in FIG. 4, and like the door plate 2 shown in FIG. It is possible to open and close in a predetermined range according to the pressure, realizes a reliable closed closure of the charging port 1a during the drying operation, and annularly increases the internal pressure of the rotating drum 10 accompanying the ignition explosion of the vaporized solvent. It can be released without difficulty through a gap formed between the packing 4 and the front plate 1.

FIG. 8 is an external perspective view of a solvent recovery type drier having a front door according to the third aspect of the present invention, and FIG. 9 is an enlarged cross-sectional view of a main part thereof.

Similarly to the front door according to the first aspect of the invention shown in FIGS. 1 and 2, the front door according to the third aspect of the present invention is provided with a door plate 2 for covering the entire surface of the inlet 1a on the front faceplate 1 of the outer housing.
The hinge plate 2a is attached to one side of the hinge shaft 2a so as to be openable and closable, and the operation of opening and closing the door plate 2 is performed by the operation unit 3 provided on the opposite side of the hinge shaft 2a. The configuration is different.

FIG. 10 is an enlarged front view of the main part of the handle portion, and FIG. 11 is a configuration diagram showing sliding of the fixing member in a cross section taken along the line AA of FIG. As shown in these figures, the operation portion 3 is provided with the door plate 2
A substrate 38 fixed to the other side, a handle 39 rotatably supported on the surface side of the substrate 38 about a horizontal axis, and a substrate 38
And a latch 40 integrally fixed to a pivot 42 of the handle 39 on the back side of the handle 39, and the latch 40 is rotated by operating the handle 39.

As shown in FIG. 9, an engaging portion 40a which is recessed forward is provided on one side of the latch 40. Further, the operation section 3 is provided with a door detection mechanism 41 for detecting the closed state of the door plate 2. That is, the front panel 1 has a magnet switch 41a.
However, when the door plate 2 is closed on the back surface of the substrate 38 on the door plate 2 side, the switch 41a is close to the magnet switch 41a.
Magnets 41b for activating the respective are provided. Further, the back surface of the door plate 2 is made to stick to the front plate 1 so that the door plate 2
Is attached with a first attracting magnet 43 for holding the.

A frame 44 which serves as an outer housing of the dryer.
A cabinet 45 is provided inside the chamber at a predetermined interval, and a fixing member 46 described later is housed within the predetermined space. That is, the fixing member 46 is provided with a locking portion 47 bent in the latching direction at one end protruding from the opening 1b of the front plate 1.
It is composed of a strip-shaped plate provided with a stopper 48 at the other end within a predetermined interval, and a pair of elongated holes 49 is formed at the center between both ends.

Then, the locking portion 47 is housed within a predetermined interval in a state of protruding from the front plate 1, and the bolt 50 inserted into the pair of long holes 49 is screwed into the fixture 51 fixed to the cabinet 45. When the fixing member 46 is slidably attached, the so-called locking portion 47
Can be separated from the front plate 1. The predetermined size L is determined by the size of the pair of elongated holes 49.

Further, when the fixing member 46 is retracted, the stopper 48 is attracted to the second attracting magnet 52 attached to the cabinet 45 and holds its position. At this position, the locking portion 47 is in the state of being closest to the front plate 1, and normally in this state, the door plate 2 is opened and closed to lock the latch 40 to the locking portion 47.

With such a locked state, the door plate 2 is attracted to the front plate 1 side by the first attraction magnet 43 as shown in FIG.
Close at. At this time, a negative pressure in the rotary drum 10 exerts an attractive force on the front plate 1. When the internal pressure of the rotary drum 10 rises, the door plate 2 is pressed from the inside, and the door plate 2 is opened by the pressing force. That is, while the locking portion 47 and the engaging portion 40a of the latch 40 are in the locked state, the fixing member 46 slides to separate the predetermined dimension L from the front plate 1, and the door plate 2 is shown by the broken line in FIG. It is released as shown to release the internal pressure.

On the other hand, as shown in FIG. 10, when the handle 39 is rotated about 60 degrees in the direction of the arrow, the latch 40 is rotated to the position indicated by the broken line, and the engagement between the engaging portion 47 and the engaging portion 40a is released. Thus, the door plate 2 can be opened against the attraction of the first attraction magnet 43.

When the door 39 is released and the hand is released from the handle 39, the handle 39 automatically rotates to the original horizontal state. Therefore, even if the door plate 2 is closed in this state, the latch 40 Only contacts the front part of the locking part 47, so the locking part 47 and the engaging part
Cannot engage with 40a. When engaging both, use the handle 39
The door plate 2 is closed in a state where the lever is rotated, and then the handle 39 is rotated to the original position, whereby the engagement becomes possible.

FIG. 12 is an external perspective view of a solvent recovery type dryer having a front door according to another embodiment, and FIG. 13 is a partially enlarged cross-sectional view thereof.

Similarly to the front door according to the first aspect of the invention shown in FIGS. 1 and 2, the front door according to another embodiment also has a door plate 2 for covering the entire surface of the inlet 1a on the front plate 1 of the outer housing.
Is configured so as to be openable and closable around the hinge shaft 2a on one side thereof, and the opening and closing operation of the door plate 2 is performed by the operation unit 3 provided on the opposite side of the hinge shaft 2a. The configuration of 3 is different.

FIG. 14 is a perspective view in which a part of the handle 55 which constitutes the operation portion 3 is cut away, and FIGS. 15 and 16 are sectional views taken in the directions of arrows A and B in FIG. As shown in these figures, the operation unit 3 includes a substrate 53 fixed to the other side of the door plate 2, and a pair of upper and lower support members 54 fixed to the substrate 53 and protruding to the front surface side of the substrate 53. A handle 55 pivotally supported by a support shaft 57 protruding vertically from each of the pair of support members 54 and rotatably supported in the left and right directions (directions of arrows a and b in FIG. 16), and the back surface side of the substrate 53. It has a latch 56 attached to the tip portion of the handle 55 protruding inward.

The operation section 3 will be described in detail. The handle 55 is composed of a U-shaped pipe, and a support shaft 57 projecting from the support tool 54 is inserted into a hole 68 formed in a substantially middle portion of the upper and lower horizontal portions to pivotally support the handle. And in the cylinder of the handle 55,
A cylindrical spring guide 63 whose one end is open is fixed, and a support plate 67 that covers the open end of the spring guide 63 and is slidable inside the spring guide 63 is provided. A connecting member 65 such as a wire to which the latch 56 is fixed at one end is inserted into the handle 55 from the upper open end of the handle 55, and further, a small hole of the spring guide 63.
A support plate 67 that is inserted from 63a into the spring guide 63, covers the lower end opening of the spring guide 63 at the other end, and is slidable inside the spring guide 63 is fixed. This support plate 67
A compressed coil spring 64, which serves as an elastic member, is interposed in the spring guide 63 between the spring guide 63 and the top plate of the spring guide 63, and elastically biases the latch 56 in a direction to draw the latch 56 into the spring guide 63. A stopper 66 is provided at an upper opening end of the handle 55 so that the latch 56 does not enter the handle 55, and a lower surface so that the movable piece 61 of the fixed member 58 can be inserted into the engaging hole 62 of the latch 56. The part is cut out 55a.

17 and 18 show a state in which the fixing member 58 mounted on the front plate 1 and the latch 56 are attached and detached. A fixing member 58 is provided on the front plate 1 at a position facing the latch 56 attached to the tip of the handle 55.
Is rotatably supported by a support shaft 59 and is always pulled by a spring 60 from the right direction. When the handle 55 is rotated counterclockwise (direction of arrow b in FIG. 16) about the support shaft 57, the latch 56 moves in the direction of arrow e against the spring 60, and
56 moves in the direction of arrow e from the engaged state shown in FIG. The fixing member 58 is moved by the moving force of the latch 56 at this time.
As shown in FIG. Therefore, the fixing member 58
The engaging hole 62 of the latch 56 is disengaged from the movable piece 61 projecting upward, and then the handle 55 is pulled to open the door plate 2.

When the latch 56 is released, the fixing member 58 is rotated in the c direction by the force of the spring 60 and returns to its original position. Although not shown, the movable piece 61 is always held in a protruding state by a spline built in the fixed member 58. Therefore, when the door-plate 2 is closed, the latch 56 pushes down the inclined surface 61a of the movable piece 61 against the spring (not shown), and the movable piece 61 has the fixed member 58 built in the engaging hole 62 of the latch 56. 17 and enters the engaged state shown in FIG.

The rotary drum 10 is hermetically closed by the annular packing 4 attached to the door plate 2. However, when the internal pressure of the rotary drum 10 rises due to the ignition and explosion of the vaporized solvent, the door plate 2 is closed. The coil spring 64 is fully compressed in a state where the latch 56 is engaged with the movable piece 61 by receiving an abnormal forward pressing force, and the support plate 67 that supports the connecting member 65 has the spring guide 63.
Enter the inside by a specified size, and connect it by the specified size 65
Is projected from the handle 55. Therefore, a gap can be formed between the front plate 1 and the door plate 2 within a predetermined range, and the door plate 2 opens to weaken the pressing of the annular packing 4 and release the internal pressure. With the predetermined size, if the tubular length of the spring guide 63 is made long and the coil spring 64 is housed, the open state of the door plate 2 can be arbitrarily obtained.

When the internal pressure of the rotary drum 10 drops due to the release of the internal pressure, the door plate 2 is again attracted to the front plate 1 by the urging force of the coil spring 64, and the insertion port 1a is sealed, so that the inside of the rotary drum 10 is closed. Shields the outside air where the equipment is installed,
The fire and odor inside the rotary drum 10 are blocked, and the fire inside the rotary drum 10 is promoted by shutting off the outside air.

[0049]

As described above in detail, in the front door according to the first aspect of the present invention, a gap is provided between the latch and the fixing member in the locked state of both, and during the drying operation, the inside of the rotary drum is When the door plate is attracted by negative pressure and the sealing member is pressed against the periphery of the charging port to achieve the hermetically closed state, on the other hand, when the internal pressure of the rotating drum rises due to the ignition of the vaporized solvent,
Due to the action of this internal pressure, the door plate is opened within the range of the gap, and the pressing of the sealing member is weakened to release the internal pressure.
The internal pressure release of the rotating drum is realized together.

Further, in the front door according to the second aspect of the present invention, when the front door is opened, the handle is rotated to separate the door plate from the front plate, so that the rotation position of the latch is restrained as it is. On the other hand, when closing the front door, the restraint is released by bringing the door plate close to the front plate, and the latch returns to the locking position to lock the fixing member. The present invention has excellent effects such as facilitating the opening / closing operation by the handle.

In the front door according to the third aspect of the present invention, since the fixing member can be slid forward while the latch and the fixing member are in the locked state to open the door plate by a predetermined dimension, vaporization is possible. When the internal pressure of the rotary drum rises due to the ignition of the solvent, the internal pressure can be released, and the structure for opening the door plate can be widely opened inside the main body by a highly reliable and inexpensive mechanism.

[Brief description of drawings]

FIG. 1 is an external perspective view of a solvent recovery type dryer including a front door according to a first aspect of the present invention. .

FIG. 2 is a transverse cross-sectional view showing the configuration of the operating portion of the front door according to the first aspect of the present invention.

FIG. 3 is an external perspective view of a solvent recovery type dryer including a front door according to a second aspect of the present invention.

FIG. 4 is a transverse cross-sectional view showing the configuration of the operating portion of the front door according to the second aspect of the present invention.

FIG. 5 is an exploded perspective view of the operating portion of the front door according to the second aspect of the present invention.

FIG. 6 is a front perspective view of an operating portion of a front door according to a second aspect of the present invention.

FIG. 7 is a front perspective view of the operating portion of the front door according to the second aspect of the present invention.

FIG. 8 is an external perspective view of a solvent recovery type dryer including a front door according to a third aspect of the present invention.

FIG. 9 is a transverse cross-sectional view showing the configuration of the operation portion of the front door according to the third aspect of the present invention.

FIG. 10 is a partially cutaway front view of an operating portion of a front door according to a third aspect of the present invention.

FIG. 11 is a slidable configuration diagram of a fixing member taken along the line AA of FIG. 9 according to a third invention of the present invention.

FIG. 12 is an external perspective view of a solvent recovery dryer having a front door according to another embodiment of the present invention.

FIG. 13 is a transverse cross-sectional view showing the configuration of the operation portion of the front door according to another embodiment of the present invention.

FIG. 14 is an exploded perspective view of an operating portion of a front door according to another embodiment of the present invention.

FIG. 15 is a sectional view of a main part in the direction A of FIG. 10 according to another embodiment of the present invention.

16 is a sectional view of a main part in the B direction of FIG. 10 according to another embodiment of the present invention.

FIG. 17 is an explanatory view showing an engaged state of a latch on a fixing member according to another embodiment of the present invention.

FIG. 18 is an explanatory view showing a disengaged state of a latch from a fixing member according to another embodiment of the present invention.

[Explanation of symbols] 1 front plate 1a input port 2 door plate 2a hinge shaft 3 operating part 4 annular packing (sealing member) 5,43,46 fixing member 10 rotating drum 12 biasing spring 13 release protrusion 31,35,39 Handle 32 Push button 33,36,40 Latch 37 Restraint plate 38 Board 40a Engagement portion 41 Door detection mechanism 41a Magnet switch 41b Magnet 42 Axis 43 First attraction magnet 44 Frame 45 Cabinet 47 Locking portion 48 Stopper- 49 Slot 50 Bolt 51 Fixture 52 Secondary magnet for attraction

Claims (3)

[Claims] 1. An opening for opening an opening in a front plate of an outer housing of a rotary drum which becomes a negative pressure during a drying operation and which is connected to the inside of the rotary drum so as to be freely opened and closed around a hinge shaft on one side thereof. A door plate is attached to the door plate, a latch provided on the other side of the door plate is locked to a fixing member fixed to the front plate, and a sealing member is pressed against the peripheral edge of the charging port to lock the charging port. In the front door of the solvent recovery type dryer that is hermetically closed, a gap is provided between the latch and the fixing member that allows a predetermined amount of opening operation of the door plate when the two are locked, and the negative pressure is generated. The front door of a solvent recovery type dryer, wherein the closing of the inlet is hermetically closed by attracting the door plate. 2. The opening of the front plate of the outer housing of the rotating drum, which becomes a negative pressure during the drying operation, and the opening of the object to be dried which is connected to the inside of the rotating drum, and can be opened and closed around the hinge shaft on one side thereof. A door plate is attached to the door plate, a latch provided on the other side of the door plate is locked to a fixing member fixed to the front plate, and a sealing member is pressed against the peripheral edge of the charging port to lock the charging port. In a front door of a solvent recovery type dryer that is hermetically closed, the latch is adapted to be disengaged from the fixing member by pivoting about an axis, and a biasing spring that biases the latch in the locking direction. And restraining means for restraining the pivotal position of the latch to a detached position from the fixing member in response to the separation from the front plate due to the opening of the door plate, and the front plate accompanying closing of the door plate. According to the proximity to the A front door of a solvent recovery type dryer, comprising: a releasing means for removing the solvent. 3. The opening of the front plate of the outer housing of the rotary drum, which becomes a negative pressure during the drying operation, and the opening of the article to be dried which is connected to the inside of the rotary drum, can be freely opened and closed around the hinge shaft on one side thereof. A door plate is attached to the door plate, a latch provided on the other side of the door plate is locked to a fixing member fixed to the front plate, and a sealing member is pressed against the peripheral edge of the charging port to lock the charging port. In the front door of the solvent recovery type dryer that is hermetically closed, the fixing member is provided so as to be separable from the front plate so that the door plate can be opened to a predetermined size in a state where the latch is locked to the fixing member. The front door of the solvent recovery type dryer, wherein the closing of the inlet is hermetically closed by the attraction of the door plate caused by the occurrence of the above.