JP3131371B2 - Ventilation fan filter and its manufacturing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable filter made of non-woven fabric and attached to, for example, a ventilation fan for a kitchen, and an apparatus for producing the filter.

[0002]

2. Description of the Related Art Ventilation fans for kitchens are subject to oily fumes generated during cooking and tend to adhere to the surfaces of housings and fans. is necessary.

In order to eliminate such complicated cleaning, there has been already used a filter in which a filter using a special paper or cloth having improved heat resistance can be detached from a housing of a ventilation fan. This filter is a simple disposable filter. For example, the filter is adapted to the shape of the housing of the ventilation fan. Such a configuration is most common.

[0004]

As a material suitable for a filter, for example, there is a non-woven fabric in which polyester is used as a fabric and the surface thereof is coated with vinyl chloride. Because this nonwoven fabric has flame retardancy, it is ideal for use in kitchens, and when a rubber band is wrapped around its outer edge, it can be easily integrated by welding.
There is an advantage that manufacturing is easy.

However, since most of the housing of the ventilation fan is square, the non-woven fabric is made of a square material conforming to this shape. On the other hand, the rubber band is annular and the outer edge of the non-woven fabric is squeezed to be attached to the housing. Deform to raise. For this reason, when the rubber band is integrated, wrinkles are easily formed on the nonwoven fabric, and the appearance when attached to the housing is often impaired.

[0006] As described above, the rubber band can be integrated with the nonwoven fabric by a welding method. However, when the rubber band is positioned along the outer periphery of the nonwoven fabric and welded, the rubber band must be properly bonded. It is necessary to perform a step of welding after deforming into a desired shape. For this reason, even if the conventional general-purpose welding apparatus is applied as it is, it cannot cope with the manufacture of the filter, requires a special jig, and has a limit in improving the productivity.

[0007] The problem to be solved in the present invention is to provide a filter which can be optimally used for a ventilation fan and an apparatus which can easily manufacture this filter.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a filter which is made of a non-woven fabric made of synthetic resin and is detachable from the front of a ventilating fan having a housing having a substantially square front shape. A substantially similar shape larger than the front shape of the housing, and four corners are cut out in a chamfered shape, and an annular elastically deformable band extending all around the outer periphery of the cloth is formed in the chamfered shape. It is arranged at a position passing through the cut-out portion, and the fabric outside the band is bent inward, and the band is included so that the overlapping portion of the fabrics is joined by heat welding.

[0009] The manufacturing apparatus may further include a substrate having a shape entirely or partially covered by the cloth, and being positioned above or below the substrate in a chamfered cutout area of the cloth set on the substrate. A guide post protruding outward, a heater having a heating surface on an inner side than a line connecting the guide posts and capable of moving forward and backward toward the surface of the substrate, and interlocking with the forward and backward movement of the heater. A bender that bends the outer peripheral edge of the cloth protruding outside the guide post toward the inner circumference side, and drives the bending of the cloth by the bender prior to the movement of the heater to the surface of the substrate. It is characterized by becoming.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION By making a band pass through a portion in which a corner of a fabric is cut off in a chamfered shape, even when the band is contracted and deformed, useless wrinkles of the fabric at the corner are eliminated. be able to.

In the apparatus, the cloth is set on the substrate with reference to the guide posts, and a belt is wrapped around these guide posts, and then the heater is moved to the surface side of the substrate. Is folded and the band is included, and then the overlapped surfaces of the fabrics are welded and joined by a heater, thereby making it possible to simplify the positioning between the fabric and the band.

[0012]

FIG. 1 is a schematic view showing a filter of the present invention together with a ventilation fan.

In FIG. 1, a ventilating fan 50 includes a housing 51 having a substantially square front shape and a fan 52 attached thereto, as generally used in the past.
The fan 52 is driven to rotate by a motor (not shown). And the filter 1 is a housing 5
1 has a size large enough to cover the entire front surface, and is composed of a cloth 2 made of non-woven fabric and a rubber band 3 integrally welded around its outer peripheral edge.

The dough 2 has a substantially square shape as shown in FIG.
a. Then, a rubber band 3 is wrapped around these notches 2a, and the cloth 2 outside the rubber band 3 is bent inward so as to wrap around the rubber band 3 as shown in FIG. 3 (b). The rubber band 3 is integrated by joining the bent portion as a welded portion 2b.

By integrating the rubber band 3, the filter 1 has a shape almost squeezed up by the rubber band 3 like a shower cap, as shown in FIG. 3A. The fabric 2 having a square original shape is most likely to have wrinkles at its corners, but since this portion has been stolen in advance by the cutouts 2a, it is possible to keep the wrinkles as small as possible. Therefore, the housing 51 of the ventilation fan 50
When installed in a kitchen, the overall appearance can be kept good and the atmosphere of the kitchen is not spoiled.

FIG. 4 is a front view showing a main part of a device for manufacturing the filter 1, and FIG. 5 is a schematic plan view taken along line AA of FIG.

In FIG. 1, a base 6 made of bakelite is provided on a base 5 fixed to a frame 4 and a pair of cylinders 7 utilizing air pressure are arranged above the base 5. A mount plate 7b is connected to the tip of the rod 7a of the cylinder 7, and a heater 8 is connected to the lower surface of the mount plate 7b via a spring 7c.

The heater 8 has a rectangular frame shape as shown in the bottom view of FIG. 6, and has a heating surface 8a large enough not to cover the cutout 2a of the cloth 2 of the filter 1. It is. The heater 8 is connected to a power source, and heats and melts and welds a nonwoven fabric made of polyester and vinyl chloride by the heat generated from the heating surface 8a.

On the upper surface of the base 5, as shown in FIG.
Guide posts 5a are provided near the respective corners. These guide posts 5a are set so as to be located outside the cutouts 2a with respect to the cloth 2 set in the range indicated by the chain line in FIG. The rubber band 3 is extended around these guide posts 5a so that the rubber band 3 runs on the inner side of the outer peripheral edge of the cloth 2 set on the substrate 6. The position of each guide post 5a is set as described above.

Each side around the base 5 is provided with a bender 9 for bending the outer peripheral edge of the cloth 2 set on the substrate 6 inward. These benders 9 are connected to the base 5 by pins 9a as shown in FIG. 4 and are rotatable in the direction of the arrow shown in the figure. It is connected to.

The bender 9 has a shape bent substantially in an L-shape with the pin 9a as a boundary, and one end of the bender 9 is used as a pusher 9b for abutting the outer peripheral portion of the cloth 2. The wire rope 10 is connected to the bender 9 via a pulling coil spring 10 a at a connection portion with the bender 9, and is wound around a pulley 4 a rotatably provided on the frame 4.

Further, the operation of the cylinder 7, the energization of the heater 8, the setting of the amount of heat generated, and the like are performed by an operation panel 4b provided at an appropriate position on the frame 4.
b has a controller for controlling all functional units.

In order to manufacture the filter 3 shown in FIG. 3 in the apparatus having the above structure, the cylinder 7 is raised from the position shown in FIG. The dough 2 is set on the substrate 6 in advance.

In this setting, as shown in the schematic diagram of FIG. 7, each of the cutouts 2a at the corners of the cloth 2 is positioned inside the guide post 5a. By setting the substrate 6 smaller than the substrate 2, the substrate 2 can be set so that the outer peripheral edge of the substrate 2 protrudes outside the substrate 6, and the protruding portion of the substrate 2 is shown in FIG. As shown in (a) of FIG. 8, it is held in a state of covering the pusher 9b of the bender 9.

Next, as shown in FIG. 7, the rubber band 3 is extended around the guide posts 5a while spreading around the guide posts 5a.
Until it hits the surface of the dough 2.

Thus, the setting of the cloth 2 on the substrate 6 and the positioning of the rubber band 3 with respect to the cloth 2 are completed. At this time, the rubber band 3 is positioned so as to go around the entire circumference along the outer peripheral edge of the cloth 2 at a position crossing each notch 2a, as shown by a dashed line in FIG.

Here, when the cylinder 7 is operated to lower the rod 7a, the mount plate 7b also moves downward. Therefore, the wire rope 10 wound around the pulley 4a disposed above the mount plate 7b moves in the direction of the arrow in FIG.

FIG. 8 is a schematic diagram showing the operation of the bender 9 by the movement of the wire rope 10, and as described above,
In the process of setting the cloth 2 and the rubber band 3, the pusher 9b is located on the lower surface of the outer peripheral edge portion of the cloth 2 and receives it as shown in FIG. Wire rope 10
Is raised, as shown in FIG.
The bender 9 rotates around the pin 9a, and the pusher 9b raises the outer peripheral edge of the cloth 2. Finally, as shown in FIG. 4C, the pusher 9b is turned upside down from the initial state. Then, the fabric 2 is bent inward.

When the cloth 2 is bent, the rubber band 3 is bent as shown in FIG.
The line connecting the contact positions of the rubber bands 3 of the guide posts 5a is formed by the pins 9
The arrangement is made so as to substantially coincide with the position a. Thereby, as shown in FIG. 8, the outer peripheral edge portion of the fabric 2 is vertically polymerized while wrapping the rubber band 3.

After the pusher 9b is rotated to the position shown in FIG. 8C, the heating surface 8a of the heater 8 is lowered to the overlapping portion of the cloth 2 as shown in FIG. Such an operation of the heater 8 can be performed by interlocking with a rotation operation of the bender 9. For example, the length and shape of a portion around the pin 9 a and connected to the coil spring 10 a are appropriately set. You can respond by doing.

When the heating surface 8a of the heater 8 is brought into contact with the fabric 2 and pressed, the synthetic resin component of the fabric 2 is melted and polymerized and welded to each other. The rubber band 3 is included, whereby the manufacture of the filter 1 is completed. And cylinder 7
Is raised to return the heater 8 and the bender 9 to their respective retracted positions, and the rubber band 3 is pulled up from around the guide post 5a to be collected as a product.

As described above, the cutouts 2a are provided at the four corners of the cloth 2 and the guide posts 5a are arranged at the corresponding portions, so that the cloth 2 and the rubber band 3 are set on the substrate 6 in this order. The filter 1 can be easily manufactured as if the rubber band 3 was sewn on the outer peripheral edge of the cloth 2 by only the setup.

FIG. 9 is a side view of a main part showing another apparatus for manufacturing the filter 1, and FIG. 10 is a perspective view of the substrate viewed from obliquely above.

In the figure, a bakelite substrate 12 is fixed to the upper end of a frame 11 in an inclined position, and a cylinder 13 is provided below the substrate 12 with its rod 13a facing upward. Four benders 14 and heaters 15 are arranged around the substrate 11.

To connect the bender 14 and the heater 15 to the rod 13a of the cylinder 13,
a, a connector plate 13b is attached to the distal end side, and the pulleys 1
1a is arranged rotatably.

The bender 14 has an L-shaped cross-sectional shape as in the previous example, and its corners are rotatably attached to the outer peripheral surface of the substrate 12 by pins 14a, and connectors 14b made of a material such as hard rubber are provided. Are provided integrally. These connectors 14b are connected to the connector plate 13
b is connected to a wire rope 16 wound around a pulley 11a with one end connected thereto, and when the rod 13a retreats, the bender 14 moves toward the peripheral surface side of the substrate 12 as shown by an arrow in FIG. And rotate.

The heater 15 is connected via a spring 15b to a holding arm 15a which is supported halfway by the frame 11, and as shown in FIG.
The base end of a is connected to the connector plate 13b.

As described above, the bender 14 and the heater 15
Are connected to the connector plate 13b by the wire rope 16 and the arm 15a, respectively, and the bender 14 and the heater 15 can be linked with each other by operating the cylinder 13. In this case, the bender 14 first strikes the outer peripheral surface of the substrate 12,
Thereafter, the configuration is such that the tip of the heater 15 contacts the substrate 12.

Guide posts 17 are provided on the outer peripheral surface of the substrate 12 near the corners. These guide posts 17 are arranged so as to project obliquely downward from the peripheral surface of the substrate 12 as shown in FIG. 11, and when the rubber band 3 is covered from above as shown by the dashed line in the figure. The rubber band 3 can be set along the outer peripheral surface of the substrate 12 so as not to fall down.

In the previous example, the fabric 2 was smaller in size than the substrate 6, but as shown in FIG.
The dough 2 is larger, and its corners are cutouts 2a cut in a triangular shape. The outer portion of the notch 2 a is also formed outside the corner of the substrate 12 and inside the protruding end of the guide post 17.

In the above configuration, to manufacture the filter 1, first, as shown in FIG. 10, the cloth 2 is placed on the substrate 12 with the position of the notch 2 a aligned with the corner of the substrate 12. Next, the rubber band 3 is set around the substrate 12 with the rubber band 3 spread, so that the rubber band 3 hangs on the guide post 17. Thereby, as shown in FIG. 9, the cloth 2 is bent so as to hit the outer peripheral surface of the substrate 12, and the edge of the cloth 2 located outside the rubber band 3 is a free end.

After setting the cloth 2 and the rubber band 3, when the cylinder 13 is operated, similarly to the above example, the bender 14 causes the edge of the cloth 2 excluding the notch 2 a to move toward the outer peripheral surface of the substrate 12. The cloth 2 wraps the rubber band 3 by this bending. Then, thereafter, the heater 15 rotates to a position where it contacts the outer peripheral surface side of the substrate 12, whereby the two layers of fabric 2 are welded to each other, and the filter 1 in which the rubber band 3 is integrated can be obtained.

[0043]

According to the filter for a ventilation fan of the present invention, even when the filter is squeezed up with a rubber band, notches can be formed at the four corners to eliminate the useless wrinkles of the fabric, and the filter is good even when attached to the ventilation fan Appearance is maintained and the atmosphere of a kitchen or the like is not spoiled.

Further, in the filter manufacturing apparatus of the present invention,
By simply setting the cloth and a band such as a rubber band on the substrate while using the guide post as the positioning, the band such as the rubber band can be sealed by bending and welding the cloth, making it easy to manufacture a filter. It is possible to cope with mass production.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a ventilation fan filter of the present invention and a ventilation fan to which the filter is attached.

FIG. 2 is a schematic perspective view of a filter fabric.

3 (a) is a perspective view of a final product of a filter including a rubber band, and FIG. 3 (b) is an enlarged vertical cross-sectional view illustrating a welded portion of the rubber band and a cloth. It is.

FIG. 4 is a schematic front view of a filter manufacturing apparatus.

FIG. 5 is a plan view of a main part showing a substrate part of the manufacturing apparatus.

FIG. 6 is a bottom view of the heater.

FIG. 7 is a schematic perspective view showing setting of a cloth on a substrate and a rubber band.

FIG. 8 is a cross-sectional view of a main part showing a process from bending of the cloth by the bender to welding of the cloth to the heater.

FIG. 9 is a side view of a main part showing another example.

FIG. 10 is a schematic view of the substrate as viewed obliquely from above and also shows a part of a drive mechanism of a bender and a heater.

11A is a schematic side view showing a positional relationship between a bender and a heater with respect to a substrate, and FIG. 11B is a schematic view of a main part showing a guide post and a rubber band set on the guide post. is there.

[Explanation of symbols]

 1: Filter 2: Fabric 2a: Notch 3: Rubber band 4: Frame 4a: Pulley 4b: Operation panel 5: Base 5a: Guide post 6: Substrate 7: Cylinder 8: Heater 8a: Heating surface 9: Bender 9a: Pin 9b : Pusher 10: Wire rope 10 a: Coil spring 11: Frame 11 a: Pulley 12: Substrate 13: Cylinder 13 a: Rod 13 b: Connector plate 14: Bender 15: Heater 16: Wire rope 17: Guide post

Claims (2)

(57) [Claims] 1. A filter which is made of a non-woven fabric made of synthetic resin as a material and is detachable from the front of a ventilation fan having a housing having a substantially square front shape, wherein the material is larger than the front shape of the housing. It has a substantially similar shape and has four corners cut out in a chamfered shape, and an annular elastically deformable band extending all around the outer periphery of the cloth is arranged at a position passing through the chamfered notch. A filter for a ventilation fan, wherein the cloth outside the band is bent inward, and the band is included therein, and a polymerized portion of the cloths is joined by heat welding. 2. An apparatus for manufacturing a filter for a ventilation fan according to claim 1, wherein said substrate is entirely or partially covered by said cloth, and is cut out in a chamfered shape of said cloth set on said substrate. A guide post that is located within the region and protrudes upward or outward from the substrate, and has a heating surface on the inner side than a line connecting the guide posts and is capable of moving forward and backward toward the surface of the substrate. A heater, and a bender that interlocks the outer peripheral edge of the cloth protruding outside of the guide post inwardly in conjunction with the advancing and retracting operation of the heater, and bending the cloth by the bender to the substrate of the heater. A device for manufacturing a filter for a ventilation fan, which is a system driven prior to movement to the surface.