JPH0238709Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides communication between a rotating drum and a stationary casing through a cylindrical seal member, and provides a drum with an improved mounting structure for the cylindrical seal member. Regarding dryers.

[Technical background of the invention] Conventionally, in a drum dryer, exhaust air from the drum is introduced into a heat exchange device, and the exhaust air is cooled and dehumidified by outside air in this heat exchange device, and then supplied into the drum again. There are some configurations that do this. In this device, a ventilation hole is formed in the rear end surface of the drum, and this ventilation hole is communicated with the ventilation hole of the casing of the heat exchanger by, for example, a cylindrical seal member made of felt. In this case, one end of the cylindrical seal member is fixed to the casing with an adhesive, and the other end is brought into sliding contact with the rear end surface of the drum to ensure airtightness.

[Problems with background technology]

However, in the above installation configuration of the cylindrical seal member, since it is fixed to the casing with adhesive, the work of applying the adhesive and sequentially gluing one end of the cylindrical seal member to the casing over the entire circumference is necessary. This is quite troublesome and has poor workability, and there is also a risk of the cylindrical sealing member peeling off during actual use, which poses problems in terms of reliability. Furthermore, the casing, which is generally made of plastic, has a problem in that it is weak in strength because it has ventilation holes in the center.

[Purpose of invention]

Therefore, the purpose of the present invention is to make it possible to easily install a cylindrical seal member with good workability, to maintain a reliable installation state over a long period of time without the problem of peeling of the cylindrical seal member, and to improve the casing strength. There is a drum dryer that can be provided.

[Summary of the idea]

The present invention consists of an annular groove formed in the casing around the ventilation hole into which one end of the cylindrical seal member is inserted, and a taper formed on the outer circumferential side of the annular groove to widen toward the drum side. a receiving surface, and a tapered pressing surface corresponding to the tapered receiving surface on the outer circumferential surface, and the tapered pressing surface is applied to one end of the cylindrical seal member from the inside of the casing. One end of the attached cylindrical seal member is tightened and fixed between it and the tapered receiving surface, and by this tightening and fixing, when the tip of the cylindrical seal member is brought into sliding contact with the end surface of the drum, the cylindrical seal member is tightened and fixed. The present invention is characterized in that it includes a mounting member that holds the distal end portion of the seal member in a tapered expanded state.

[Example of idea]

An embodiment of the present invention will be described below based on the drawings.

First, in FIG. 3, reference numeral 1 denotes an outer box, which has an inlet/outlet 2 for the material to be dried formed on its front surface, and has an annular support plate 4 fixed thereto, which has a cylindrical opening 3 communicating with the inlet/outlet 2 at the back side of the front surface. are doing. Reference numeral 5 denotes a drum, which has a circular opening 6 on its front end surface fitted into and supported by the outer periphery of the support plate 4 via a bearing 7, and a support shaft 8 attached to its rear end surface is fixed to the rear inside the outer box 1. Bearing 1 on horizontal frame 9
It is supported through 0. Reference numeral 11 denotes a casing of the heat exchange device 12, which is disposed in the rear part of the outer box 1 so as to face the rear end surface of the drum 5, and is fixed to the rear surface of the outer box 1. The casing 11 is made of plastic and has a substantially deep dish shape, and has a circular ventilation hole 14 formed in the center thereof, which corresponds to the ventilation hole 13 in the center of the rear end surface of the drum 5. 15 is casing 1
1 is a cylindrical sealing member made of a soft material such as felt attached as described below, and is tapered toward the tip, and the tip portion is in sliding contact with the rear end surface of the drum 5. This allows airtight communication between the vent holes 13 and 14 of the drum 5 and the casing 11. On the other hand, the heat exchange device 12 is composed of a rotary heat exchanger that also serves as a fan, and is rotatably attached to the support shaft 8 so as to divide the inside of the casing 11 into an exhaust gas introduction chamber 16 and an outside air introduction chamber 17. It consists of a supported circular main plate 18 and blades 19 and 20 protruding from both the front and rear sides of the main plate 18. And casing 1
A suction hole 21 and a discharge hole 2 are provided on the rear surface of the outer box 1 for sucking and discharging outside air into the outside air introduction chamber 17 of the outer box 1.
2, and a duct (not shown) is connected between the two to return the exhaust air drawn into the exhaust introduction chamber 16 from the drum 5 into the drum 5, as shown by the double-dashed arrow A in the figure, for example. A heater is placed inside this duct. 23 is drum 5
and the main plate 18 of the heat exchanger 12 are connected to belts 24, respectively.
and 25, and when this motor 23 starts, it rotates the drum 5 and the main plate 1.
8 rotates, and the air inside the drum 5 is sucked into the exhaust introduction chamber 16 through the ventilation holes 13 and 14 by the centrifugal blower of the blades 19 and 20 based on the rotation of the main plate 18, and the air is sucked into the drum 5 through the duct. In the process of being returned to the atmosphere, the outside air is hot-aired by a heater, and is sucked into the outside air introduction chamber 17 through the suction hole 21 and discharged outward through the discharge hole 22. The air hot-aired by the heater and supplied into the drum 5 removes moisture from the material to be dried, and then is sucked into the exhaust introduction chamber 16 again, where it passes through the main plate 18 and the blades 19 and 20. The air is circulated by exchanging heat with the outside air by heat conduction, cooling and dehumidifying it, and then being hot-aired again and supplied into the drum 5. In addition, 26 is a sealing ring attached to the outer periphery of the main plate 18, 27 is a lint filter provided on the inside of the rear end surface of the drum 5 so as to cover the ventilation hole 13, and 28 is a door for opening and closing the entrance/exit 2. .

Now, the mounting structure of the cylindrical seal member 15 will be explained with reference to FIGS. 1 and 2. Reference numeral 28 denotes an annular groove formed around the ventilation hole 14 on the front surface of the casing 11, and the outer circumferential side of the annular groove 28 is formed into a tapered shape that expands in diameter toward the front. Tapered receiving surface 29
It is said that Reference numeral 30 denotes a mounting portion formed in an annular shape from a metal plate, the outer peripheral side of which is formed into a tapered shape, and the outer peripheral surface thereof is a tapered holding surface 31 corresponding to the tapered receiving surface 29, and the tip of this tapered holding surface 31 is A small protruding narrow flange 32 is provided at the portion. Note that the bridge frame 30 is installed inside this mounting member 30.
a is integrally formed.

In the above configuration, in order to attach the cylindrical seal member 15 to the casing 11, first attach one end of the cylindrical seal member 15, which is in a cylindrical state before attachment, to the first
As shown by the two-dot chain line in the figure, the cylindrical seal member 15 is inserted into the annular groove 28 to maintain the cylindrical seal member 15 in a temporarily attached state to the casing 11. Next, the mounting member 30
is inserted into the cylindrical sealing member 15, and the tapered pressing surface 31 is applied to one end of the cylindrical sealing member 15 from the inside to press it against the tapered receiving surface 29. In this state, the mounting member 30 is tightened and fixed to the outer peripheral edge of the vent hole 14 of the casing 11 using a plurality of screws 33. Then, one end of the cylindrical seal member 15 is strongly tightened and firmly fixed between the tapered receiving surface 29 and the tapered pressing surface 31, and the cylindrical seal member 15 is closed as shown by the solid line in FIG. The entire member 15 is expanded in a slightly tapered shape so as to expand toward the tip. Further, at this time, the edge of the small flange 32 slightly bites into the cylindrical seal member 15, thereby more reliably preventing the cylindrical seal member 15 from coming off. When the cylindrical seal member 15 attached to the casing 11 in this manner is pressed against the rear end surface of the drum 5, the attachment member 3
Since it has been expanded into a tapered shape in advance by 0, it can be easily expanded into a tapered shape with a larger inclination than normal, making it easier to work.

In this case, assuming that the cylindrical seal member 15 remains cylindrical, when pressing the tip of the cylindrical seal member 15 against the rear end surface of the drum 5, if the tip is pressed as is, the tip of the cylindrical seal member 15 A certain part of the part bends inwardly and another part bends outwardly, and a gap is created between the cylindrical seal member 15 and the rear end surface of the drum 5 at the part where the bending direction changes. In order to prevent such problems, it is necessary to press the tip of the cylindrical seal member 15 against the rear end surface of the drum 5 while pushing it outward, which becomes extremely troublesome.
However, in this embodiment, the distal end portion of the cylindrical seal member 15 is held in a tapered and expanded state by the mounting member 30, so that the distal end portion of the cylindrical seal member 15 can be opened by simply pressing it against the drum 5. will naturally expand into a tapered shape, greatly improving work efficiency.

In the above embodiment, a case where a cylindrical seal member is attached to a casing of a heat exchanger is explained as an example, but the present invention is not limited to this, and for example, hot air can be supplied into a drum from the rear end surface. The present invention may be modified in various ways without departing from the spirit of the invention, such as being applied when a cylindrical seal member is attached to the hot air guiding casing in a product.

[Effect of idea]

As explained above, the present invention allows the cylindrical seal member to be temporarily held in the casing by inserting one end of the cylindrical seal member into the annular groove when the cylindrical seal member is attached to the casing. By fixing the mounting member to the casing in this temporarily held state with screws or the like, the entire circumference of one end of the cylindrical seal member can be easily fixed to the casing. Moreover, since the cylindrical seal member is tightened and fixed between the tapered receiving surface and the tapered pressing surface, which are both tapered, tightening is reliable all around the circumference, sealing performance is improved, and long-term use is possible. There is no risk of the casing coming off, and furthermore, since the area around the ventilation hole of the casing is reinforced by the mounting member, the strength of the casing is improved. Moreover, since the cylindrical seal member is held in a state in which the distal end thereof is expanded in a tapered shape by the mounting member, simply pressing the distal end of the seal member against the end face of the drum will cause the distal end of the seal member to open. The cylindrical seal member is expanded into a more tapered shape and comes into sliding contact with the end surface of the drum, and the tip of the cylindrical seal member is pressed against the end surface of the drum while being expanded.
This has various excellent effects such as improving workability without having to do such troublesome work.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal cross-sectional view of the main parts, FIG. 2 is an exploded perspective view of the main parts, and FIG. 3 is a longitudinal cross-sectional side view of the entire dryer. In the figure, 1 is an outer box, 5 is a drum, 11 is a casing, 13 and 14 are ventilation holes, 15 is a cylindrical seal member, 28 is an annular groove, 29 is a tapered receiving surface, 30 is a mounting member, and 31 is a taper It is a pressed surface.

Claims (1)

[Scope of utility model registration request] A drum is rotatably arranged inside the outer box, and a soft material is installed between the ventilation hole formed on the end surface of the drum and the ventilation hole of the casing fixed to the outer box side so as to face the end surface of the drum. A ring groove formed around the air hole in the casing and into which one end of the cylinder seal member is inserted, and an outer peripheral side of the ring groove. a tapered receiving surface formed to expand toward the drum side, and a tapered pressing surface corresponding to the tapered receiving surface on the outer periphery, and the tapered pressing surface is connected to the cylindrical sealing member. The one end of the cylindrical seal member is attached to the casing from the inside, and the one end of the cylindrical seal member is tightened and fixed between the tapered receiving surface and the end of the cylindrical seal member is tightened and fixed. A drum dryer comprising: a mounting member that holds the distal end portion of the cylindrical seal member in a tapered expanded state when the portion is brought into sliding contact with the end surface of the drum.