JP2919686B2 - Front door of solvent recovery dryer - Google Patents

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 method in which a rotary drum for storing an object to be dried and dewatered using a petroleum-based solvent is placed under negative pressure, and the solvent is recovered and dried. The structure of the front door of the machine.

[0002]

2. Description of the Related Art When drying a washed article such as clothing washed with a petroleum-based solvent, the solvent is evaporated after the washing in order to recover the solvent that is released from the article to be dried during the official drying. A solvent recovery type comprising a circulating air path including a rotary drum that stores the material to be dried and rotates around a horizontal axis, and a ventilation fan, a condenser, and a heater are arranged inside the circulating air path. A dryer is used.

[0003] The operation of this type of dryer is such that circulating air generated by a blowing fan is heated by a heater and introduced into a rotating drum, and a solvent contained in a material to be dried inside the rotating drum is evaporated and vaporized. The conveyer is carried out, condensed and liquefied by contact with the condenser, and recovered. On the other hand, the circulating air cooled by the condensation is reheated by a heater and introduced into the rotating drum repeatedly.

[0004] 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 the 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 in, for example, Japanese Patent Application Laid-Open No. 62-224398. A communication port to the outside air is provided immediately after the fan, and a heater and a rotary drum located downstream of the communication port are placed under negative pressure so that evaporation and evaporation of the solvent can be performed in a low oxygen state. Solvent recovery type dryers that prevent the occurrence have been put to practical use.

[0005]

In this type of dryer, an inlet for a material to be dried connected to the inside of the rotary drum is formed in a front plate of an outer housing that covers the front surface of the rotary drum. A front door is provided to close the inlet during operation. This front door has a door plate that is opened and closed around a hinge axis on one side thereof, 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, and the front door is closed. In general, the mouth is closed.

However, in the solvent-recovery-type dryer configured so that the inside of the rotary drum has a negative pressure during the drying operation as described above, the conventional front door may destroy the negative pressure inside the rotary drum. In order not to use a door plate having a sealing member (packing) on its periphery, the door plate is firmly pressed against the front plate to obtain a closed state, while the rotary drum rises explosively as the vaporized solvent ignites In order to release the internal pressure, a complicated structure with an internal pressure release mechanism that detaches the door plate from the front plate according to the application of a predetermined internal pressure is adopted, which takes time and effort to open and close, and increases cost. There were difficulties.

On the other hand, when opening the front door, it is necessary to release the latch from the fixing member, and many front doors are provided with a rotary handle as operating means for reliably performing this operation. Used. In this type of front door, a latch is rotated by operating a handle to separate from the fixing member, and an opening operation is performed by pulling a door plate while holding the handle. There was a drawback in that the latch was rotated by the operation of the handle, and in this state, a series of closing operations were required to release the handle after pressing the door plate against the front plate and to engage the latch with the fixing member.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a simple structure in which a sealing opening of an input port connected to the inside of a rotary drum is realized with a simple structure, and furthermore, a solvent recovery type dryer which is easy to open and close. The purpose is to provide a front door.

[0009]

According to a first aspect of the present invention, a front door of a solvent recovery type drier is opened in a front plate of an outer housing of a rotary drum which becomes a negative pressure during a drying operation. A door member is attached to the inlet of the object to be dried connected to the inside of the door so as to be openable and closable around a hinge axis on one side thereof, and a latch provided on the other side of the door plate is fixed to the front plate. And a sealing member is pressed against the periphery of the charging port, and the charging port is hermetically closed. In the front door of the solvent recovery dryer, the locking between the latch and the fixing member is performed. Sometimes, a gap is provided to allow a predetermined amount of opening operation of the door plate, and the closing of the inlet is realized by the attraction of the door plate due to the negative pressure during the drying operation.
During the drying operation, the internal pressure of the rotary drum abnormally rises.
In order to release this internal pressure, the door plate is
Opening operation.

The front door of the solvent recovery type dryer according to the second invention of the present invention is provided with a cover which is opened to the front plate of the outer housing of the rotary drum which becomes a 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 a hinge axis 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 the front door of the solvent recovery type dryer that presses a sealing member against the periphery of the input port and hermetically closes the input port, the latch is disengaged from the fixed member by rotation about one axis. A pivot spring for urging the latch in the locking direction and a pivoting position of the latch from the fixing member in accordance with separation of the front plate with the opening of the door plate. Restraining means for restraining the door plate, and the front surface accompanying the closing of the door plate Depending on the proximity of, but comprising a canceling means for canceling the restraint of the latch by the restraining means.

Further, the front door of the solvent recovery type dryer according to the third invention of the present invention has a cover which is opened to the front plate of the outer housing of the rotary drum which becomes a 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 a hinge axis on one side thereof, and a latch provided on the other side of the door plate is locked to a fixing member on the front plate side ,
In the front door of the solvent recovery type dryer that presses a sealing member against the periphery of the input port and hermetically closes the input port, the door plate can be opened to a predetermined size while the latch is locked to the fixing member. The fixing member is movable in the front-rear direction.
The opening of the inlet is hermetically closed by the attraction of the door plate accompanying the negative pressure during the drying operation, and the internal pressure of the rotary drum is reduced during the drying operation.
When the pressure rises abnormally, the fixing member is used to release the internal pressure.
The door plate is opened by a predetermined size due to the separation from the front plate.
Enabled to work.

[0012]

According to the first aspect of the present invention, a gap is provided between the latch and the fixing member in a state where the both are locked, and during the drying operation, the door plate is attracted by the negative pressure inside the rotating drum,
While the sealing member is pressed against the peripheral edge of the charging port to achieve a closed seal, when the internal pressure of the rotating drum rises due to the ignition of the vaporized solvent, the door plate is moved within the range of the gap by the action of the internal pressure. The opening operation is performed, and the pressing of the sealing member is weakened to release the internal pressure.

In the second aspect of the present invention, when the front door is opened, the latch is rotated by operating the handle, and then the door plate is separated from the front plate. When the rotation position is restrained as it is and the front door is subsequently closed, the restraint is released by the operation of the release means by bringing the door plate close to the front plate, and the latch is released by the urging force of the urging spring. It returns to the locking position, and locking to the fixing 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 locked, so that the door plate can be separated from the front plate by a predetermined dimension. When the internal pressure of the rotary drum increases due to the ignition of the vaporized solvent, the door plate opens within the range of the predetermined size by the action of the internal pressure, and the pressing of the sealing member is released to release the internal pressure. .

[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 invention of the present invention, and FIG. 2 is a cross-sectional view showing a part of the dryer in an enlarged manner.

In FIG. 1, reference numeral 1 denotes 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. 2, an inlet 1a for the object to be dried connected to the inside of the rotary drum 10 is opened, and a door plate 2 covering the entire surface of the inlet 1a is attached to be openable and closable around a hinge shaft 2a on one side thereof. The opening and closing operation of the door plate 2 is performed by an operation unit 3 provided on the opposite side of the hinge shaft 2a.
An annular packing 4 serving as a sealing member is provided around the periphery of the door plate 2.
Is worn around.

The operating section 3 includes a board 30 fixed to the door plate 2, a handle 31 protruding from the front side of the board 30, a push button 32 arranged near the handle 31, and And a latch 33 provided on the back surface side of the substrate 30. The latch 33 is attached to the substrate 30
2, is biased in a direction protruding to the outside of the door plate 2, and is normally at a position protruding from the side edge of the substrate 30 by a predetermined length as shown in FIG. When the push button 32 is pressed, the substrate
In conjunction with the retraction mechanism built in 30, the reciprocating operation is performed against the urging. A fixed plate 5 is fixed on the front plate 1 adjacent to the substrate 30 of the operation unit 3.
As shown in FIG. 2, the latch 33 protrudes from the rear side of the fixing plate 5 and engages with the fixing plate 5.

In the front door constructed as described above, in the closed state shown in FIG. 2, when the handle 31 is gripped and the push button 32 is pressed, the latch 33 retreats as described above, and In this state, the handle 31 is pulled forward and the door plate 2 is rotated about the hinge shaft 2a to open the slot 1a.

On the other hand, when the door plate 2 in the open state is closed, an appropriate portion of the door plate 2 is pressed to 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 contact portion of the latch 33 has a tapered surface whose thickness decreases toward the tip, and the latch 33 retreats with contact with the fixing plate 5, and the back side of the fixing plate 5. Can be entered, and after this intrusion, advance 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 is provided within the range of the gap S. Operation in the opening direction is allowed. The annular packing 4 on the periphery of the door plate 2 is in contact with the front plate 1a on the periphery of the inlet 1a, and the door plate 2 can operate in the opening direction with the crushing of the annular packing 4.

That is, the door plate 2 can slightly move in the opening and closing directions in the closed state, and this operation is caused by a pressure difference between the inside and outside of the door plate 2. Therefore, during the normal drying operation, the door plate 2 is slightly attracted to the front plate 1 due to the negative pressure generated in the rotating drum 10, and the door plate 2 moves slightly in the opening direction with the crushing of the annular packing 4. Doing so, while the inlet 1a is securely closed and closed,
When the internal pressure of the rotary drum 10 rises due to the ignition 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 ring packing 4 and the front plate 1 The internal pressure is released without difficulty through the gap formed therebetween.

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

The front door according to the second invention is also provided with a door plate 2 covering the entire surface of the slot 1a on the front plate 1 of the outer housing, similarly to the front door according to the first invention shown in FIGS.
It is configured so that it can be freely opened and closed around the hinge shaft 2a on one side, and the opening and closing operation of the door plate 2 is performed by an 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 operation unit 3, and FIGS. 6 and 7 are front perspective views of the operation unit 3. As shown in these figures, the operation unit 3 is provided with a board 34 fixed to the other side of the door plate 2.
A handle 35 supported on the front side of the board 34 so as to be rotatable around a horizontal axis, and a latch 36 integrally fixed to the pivot of the handle 35 on the back side of the board 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 which penetrates the handle 35 at a position away from the fixed position of the handle 35 with the pivot, on the front and back sides, and near the end on the same side. Front plate 1
And a tension spring 12 erected between the spring projection 36a and the spring projection 11 projecting from the front plate 1.
12 is urged to shorten. That is, when no operating force is applied to the handle 35, the latch 36 is urged in one direction by the spring force of the tension spring 12 to be in the rotation position shown in FIG. Fixing member 5 fixed to
, But according to the rotation operation of the handle 35,
It rotates against the spring force of the tension spring 12, and as shown in FIG.
It will be in a state of being detached from the fixed plate 5 in plan view.

As shown in FIGS. 6 and 7, a restraining plate 37 is provided on one side of a latch 36 on the back side of the substrate 34. As shown in FIG.
As shown in FIG. 5, the restraining plate 37 is urged in a direction away from the substrate 34 by a pressing spring 37b interposed between the restraining plate 37 and the back surface of the substrate 34. And a restraining protrusion 37a protruding toward the front plate 1. When the restraining plate 37 is fixed, the projecting position of the restraining projection 37a is determined by the handle.
Due to the rotation of the latch 36 due to the rotation operation of 35, the locking hole 36b
Is set so as to coincide with the movement locus followed by.

On the other hand, a release projection 13 is provided on the surface of the front plate 1 at a position corresponding to 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 restraint plate 37 is pressed and moved against the urging of the pressing spring 37b of the restraint plate 37.

In the front door constructed as described above, in the closed state shown in FIG. 4, the user grips the handle 35 and rotates the latch 36 as shown in FIG. Pull the handle 35 toward you in this state and move the hinge shaft 2a.
The inlet 1a can be opened by rotating the door plate 2 around. When 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 is pushed by the pressing spring 37b. 7 moves away from the substrate 34 by the urging force, and as shown in FIG.
7a is engaged with the locking hole 36b which is aligned with the arrangement position thereof, and the rotation of the latch 36 is restrained, and the latch 36 and the handle 35 are held in the opened rotation position.

On the other hand, when closing the door plate 2 in the open state, an appropriate portion of the door plate 2 is pressed to rotate the door plate 2 around the hinge shaft 2a. At this time,
Since the latch 36 is restrained at the rotating position at the time of opening,
While reaching the rear surface of the fixed plate 5 without colliding with the fixed plate 5, the release projection is formed by the proximity of the door plate 2 to the front plate 1.
13 collides with the restraint member 37, the restraint member 37
As a result, the protrusion 37b is
36b, and the latch 36 is moved by the urging force of the tension spring 12 as shown in FIG.
The latch 36 automatically returns to the closed rotation position shown in FIG. 4 and the latch 36 enters the back side of the fixed plate 5, and the engagement with the fixed plate 5 is realized.

In such a 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. Opening / closing operation in a predetermined range is possible according to the pressure, and the sealing and closing of the charging port 1a during the drying operation is realized, and the internal pressure of the rotating drum 10 which rises with the flash explosion of the vaporized solvent is reduced. The gas can be easily discharged through a gap generated 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 invention of the present invention, and FIG. 9 is an enlarged cross-sectional view showing a main part thereof.

The front door according to the third aspect of the invention also has a door plate 2 covering the entire opening 1a on the front panel 1 of the outer housing, similarly to the front door according to the first aspect shown in FIGS.
It is configured so that it can be freely opened and closed around the hinge shaft 2a on one side, and the opening and closing operation of the door plate 2 is performed by an 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 a main part of the handle, 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 unit 3 is
A substrate 38 fixed to the other side, a handle 39 supported on the surface side of the substrate 38 so as to be rotatable about a horizontal axis, and a substrate 38.
And a latch 40 integrally fixed to the 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, one side of the latch 40 is provided with an engaging portion 40a which is recessed forward. Further, the operation unit 3 is provided with a door detection mechanism 41 for detecting a closed state of the door plate 2. That is, the magnet switch 41a is provided on the front plate 1.
On the door plate 2 side, when the door plate 2 is closed on the back surface of the substrate 38, the switch 41a comes close to the magnet switch 41a.
Are provided, respectively. Also, on the back surface of the door plate 2, the front plate 1
The first magnet 43 for adsorption | suction which hold | maintains a closed state is attached.

A frame 44 serving as an outer housing of the dryer.
A cabinet 45 is provided at a predetermined interval inside the box, and a fixing member 46 to be described later is accommodated within the predetermined interval. That is, the fixing member 46 is provided with a locking portion 47 bent in the latch direction at one end protruding from the opening 1b of the front plate 1,
It is composed of a band-shaped plate provided with a stopper 48 at the other end within a predetermined interval, and a pair of long holes 49 is formed in the center between the both ends.

The locking portion 47 is housed within a predetermined interval with the locking portion 47 protruding from the front plate 1, and the bolt 50 inserted into the pair of long holes 49 is screwed into the mounting tool 51 fixed to the cabinet 45. By attaching the fixing member 46, the fixing member 46 can be slid
From the front plate 1. The predetermined dimension L is determined by the dimensions of the pair of long holes 49.

When the fixing member 46 is retracted, the stopper 48 is attracted to the second attracting magnet 52 attached to the cabinet 45 to hold the position. In this position, the locking portion 47 is 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 by the first attracting magnet 43 as shown in FIG.
Close with. At this time, the negative pressure in the rotating drum 10 exerts an attractive force on the front plate 1. When the internal pressure of the rotary drum 10 increases, 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 moved by a broken line in FIG. Open as shown to release 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 shown by the broken line, and the engagement between the locking portion 47 and the engaging portion 40a is released. Thus, the door plate 2 can be opened against the attraction of the first attracting magnet 43.

When the handle 39 is released from the handle 39 after the door plate 2 is opened, the handle 39 automatically turns to the original horizontal state. Therefore, even if the door plate 2 is closed in this state, the latch 40 is required. Only comes into contact with the front part of the locking part 47, so the locking part 47 and the engaging part
Cannot engage with 40a. When engaging both, handle 39
Is turned, the door plate 2 is closed, and then the handle 39 is turned to the original position to enable the engagement.

FIG. 12 is an external perspective view of a solvent recovery type drier having a front door according to another embodiment, and FIG. 13 is a cross-sectional view showing a part of the dryer in an enlarged manner.

A front door according to another embodiment also has a door plate 2 covering the entire surface of the input port 1a on the front plate 1 of the outer housing, similarly to the front door according to the first invention shown in FIGS.
Is mounted so as to be openable and closable around a hinge shaft 2a on one side thereof, and the opening and closing operation of the door plate 2 is performed by an operation unit 3 provided on the opposite side of the hinge shaft 2a. 3 is different.

FIG. 14 is a perspective view in which a part of a handle 55 constituting the operation unit 3 is cut away, and FIGS. 15 and 16 are cross-sectional views as viewed from directions 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 supports 54 fixed to the substrate 53 and protruding toward the surface of the substrate 53. A handle 55 pivotally supported by a support shaft 57 projecting vertically from each of the pair of supports 54 and supported so as to be rotatable in the left-right direction (the directions of arrows a and b in FIG. 16), and the back side of the substrate 53 And a latch 56 attached to the tip of a handle 55 protruding from the handle.

The operation section 3 will be described in detail. The handle 55 is formed of a U-shaped pipe, and has a support shaft 57 protruding from the support 54 inserted into a hole 68 formed substantially in the middle of the upper and lower horizontal portions, and is rotatably supported. And in the cylinder of the handle 55,
A cylindrical spring guide 63 having one open end is fixed, and a support plate 67 that covers the open end of the spring guide 63 and is slidable in 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 which is inserted into the spring guide 63 from 63a and covers the lower end opening of the spring guide 63 at the other end and is slidable in the spring guide 63 is fixed. This support plate 67
A compressed coil spring 64 serving as an elastic member is interposed in the spring guide 63 between the spring guide 63 and the top plate, and urges the latch 56 in a direction to draw the latch 56 into the spring guide 63. The upper open end of the handle 55 is provided with a stopper 66 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 notched 55a.

FIGS. 17 and 18 show a state where the fixing member 58 attached to 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. When the handle 55 is rotated counterclockwise (in the 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 moving force of the latch 56 at this time causes the fixing member 58 to move as shown in FIG.
It rotates in the direction of arrow d 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 comes off, the fixing member 58 rotates in the direction c by the force of the spring 60 and returns to the original position. Although not shown, the movable piece 61 is always held in a protruding state by a spring embedded in the fixed member 58. Therefore, when closing the door plate 2, the latch 56 pushes down the inclined surface 61a of the movable piece 61 against a spring (not shown), and the movable piece 61 is embedded in the engaging hole 62 of the latch 56. And the engagement state shown in FIG.

The rotary drum 10 is hermetically closed by the annular packing 4 mounted on the door plate 2. However, when the internal pressure of the rotary drum 10 rises due to the flammable 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 due to an abnormal forward pressing force, and the support plate 67 supporting the connecting member 65 includes a spring guide 63.
Into the connecting member 65 by the predetermined dimension.
Is protruded from the handle 55. Therefore, a gap can be formed between the front plate 1 and the door plate 2 within a range of a predetermined size, and the door plate 2 opens to reduce the pressing of the annular packing 4 to release the internal pressure. With the above-mentioned predetermined dimensions, if the length of the cylindrical shape of the spring guide 63 is increased to accommodate the coil spring 64, 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 input port 1a is sealed. Shields the outside air where the equipment is installed,
The fire and the odor in the rotating drum 10 are blocked, and the extinguishing of the fire in the rotating 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 a state in which the latch and the fixing member are locked, and the inside of the rotary drum during the drying operation is provided. When the door plate is attracted by the negative pressure and the sealing member is pressed against the periphery of the charging port to realize the sealing closure, when the internal pressure of the rotating drum rises due to the ignition of the vaporized solvent,
Due to the action of the internal pressure, the door plate opens within the range of the gap, and the internal pressure is released by weakening the pressing of the sealing member.
Both the internal pressure release of the rotating drum is realized.

In the front door according to the second aspect of the present invention, when the front door is opened, the handle is turned to separate the door plate from the front plate, so that the turning 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, the latch returns to the locking position, and locking to the fixing member is realized. The present invention has excellent effects, such as easy opening and closing operations with a handle.

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

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing a configuration of an operation unit of the front door according to the first invention of the present invention.

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

FIG. 4 is a cross-sectional view showing a configuration of an operation unit of a front door according to a second invention of the present invention.

FIG. 5 is an exploded perspective view of an operation unit of the front door according to the second invention of the present invention.

FIG. 6 is a front perspective view of an operation unit of a front door according to a second invention of the present invention.

FIG. 7 is a front perspective view of an operation unit of a front door according to a second invention of the present invention.

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

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

FIG. 10 is a front view of the front door according to the third invention of the present invention, in which an operation unit of the front door is partially broken.

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

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

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

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

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front plate 1a Input port 2 Door plate 2a Hinge shaft 3 Operating part 4 Ring packing (sealing member) 5,43,46 Fixing member 10 Rotary drum 12 Urging spring 13 Release projection 31,35,39 Handle 32 Push button 33 , 36,40 Latch 37 Restraint plate 38 Substrate 40a Engagement part 41 Door detection mechanism 41a Magnet switch 41b Magnet 42 Axis 43 First adsorption magnet 44 Frame 45 Cabinet 47 Locking part 48 Stopper 49 Elongate hole 50 Bolt 51 Mounting bracket 52 Second attracting magnet

Claims (3)

(57) [Claims] 1. An opening in a front plate of an outer housing of a rotary drum, which becomes a negative pressure during a drying operation, is openable and closable around a hinge shaft on one side of an inlet of a material to be dried connected to the inside of the rotary drum. , A latch provided on the other side of the door plate is engaged with a fixing member fixed to the front plate, and a sealing member is pressed against the periphery of the input port to close the input port. in front door of the solvent recovery dryer to seal closure, between the fixing member and the latch includes a gap to permit a predetermined amount of opening operation of the door plate when both locking, dry
The inlet port is hermetically closed by the attraction of the door plate due to the negative pressure during the drying operation, and during the drying operation,
If the internal pressure of the rotating drum rises abnormally,
The door plate can be opened by the predetermined amount to release.
Front door of the solvent recovery dryer being characterized in that the. 2. An opening in the front plate of the outer housing of the rotary drum, which becomes a negative pressure during the drying operation, is openable and closable around a hinge axis on one side of an inlet of a material to be dried connected to the inside of the rotary drum. , A latch provided on the other side of the door plate is engaged with a fixing member fixed to the front plate, and a sealing member is pressed against the periphery of the input port to close the input port. In the front door of the solvent recovery type dryer that is hermetically closed, the latch is disengaged from the fixed member by rotation about one axis, and an urging spring for urging the latch in a locking direction. Restraint means for restraining a rotation position of the latch to a position at which the latch is detached from the fixing member in accordance with separation from the front plate upon opening of the door plate, and the front plate upon closing of the door plate Release the restraint of the latch by the restraining means in accordance with the proximity to A front door of a solvent recovery type drier, comprising: a release means for removing the solvent. 3. An opening in the front plate of the outer housing of the rotary drum, which becomes a negative pressure during the drying operation, is openable and closable around a hinge axis on one side of an inlet of a material to be dried connected to the inside of the rotary drum. , A latch provided on the other side of the door plate is engaged with a fixing member on the front plate side, and a sealing member is pressed against the periphery of the input port to seal and close the input port. In the front door of the solvent recovery type drier, the fixing member can be moved in the front-rear direction so that the door plate can be opened by a predetermined dimension while the latch is locked to the fixing member.
The opening of the inlet is hermetically closed by the attraction of the door plate accompanying the negative pressure during the drying operation, and the internal pressure of the rotary drum is reduced during the drying operation.
When the pressure rises abnormally, the fixing member is used to release the internal pressure.
The door plate is opened by a predetermined size due to the separation from the front plate.
A front door of a solvent recovery type dryer characterized by being operable .