JP3415720B2 - Range hood filter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for a range hood, and more particularly to a filter having a vent formed by cutting and raising. 2. Description of the Related Art A range hood, which is mounted immediately above a gas stove or an electric stove installed in a kitchen and collects and discharges smoke, steam, oily smoke, etc. generated during cooking, has an oily smoke. A grease filter that captures and recovers oils and fats contained therein is attached. As a grease filter, slits are vertically provided on a thin metal plate at a predetermined pitch, and the entire tongue piece partitioned by the slits is refracted and inclined in one direction, that is, cut and raised to leave a flat portion between the slits. A filter provided with a vent having a predetermined width without using a filter can be used.
No. 3456. [0003] The above filter is shown in FIG.
As shown in the figure, the upper die 11 and the lower die 1 having one
At 1 ', a row is cut and raised at predetermined intervals in the width direction of the long strip a', and the strip is fed by one row to cut and raise the next row, and this is repeated and cut to a predetermined length. Then, it is formed by molding such as bending four sides. However, the above-described filter has a plurality of rows of vents formed by cutting and raising a strip of a predetermined length along the length direction. It is a flat portion on the outer periphery surrounding a plurality of rows, and only the both sides in the longitudinal direction are connected to the entire length in the width direction, and only a narrow band-shaped flat portion exists in parallel along the longitudinal direction between the two. Therefore, in order to secure a high oil and fat collection rate while maintaining a low airflow resistance in the above-described embodiment, it is necessary to increase the ratio of the opening area of the ventilation hole due to the cut and raised with respect to the band plate. Therefore, the completed filter has a problem that twisting deformation occurs. The twist deformation can be prevented by using a metal strip having a large thickness. However, there is a problem that the weight increases, the handling becomes difficult, and the cost increases. Further, since the above-described filter is formed by cutting and raising one horizontal line as described above, there is a problem that it takes a long time to form one filter. For example, a filter having a width of 298 mm and a length of 342 mm requires cutting and raising of 120 rows, and the processing time for cutting and raising is about 40 seconds. As a method of shortening the processing time, it is conceivable to manufacture a total die (die) that cuts and raises all 120 rows at a time and manufactures it in one process. On the other hand, the depth of cooking utensils (sinks) for gas ranges and electric ranges below the range hood has been increasing in recent years. In the past, products had a depth dimension of 55 cm, but in recent years, products such as 60 cm, 65 cm, 70 cm, and 75 cm have been increasing. With this trend, range hoods are required to have a large depth dimension, and manufacturers are responding to this demand. With the increase in the depth dimension, various filters having different length dimensions are required for filters provided in the range hood. In the case of a type in which the filter is attached to the lower opening of the hood in a substantially horizontal manner, a filter having only the depth dimension may be used, but the filter is installed on the back plate side of the lower opening of the hood. The number of types is very large, including the type that is attached at an angle between the front edge of the board and the front edge of the top board. By the way, in the case of the above-described processing method by one row, it is sufficient to process the number of cut and raised portions corresponding to the required length and cut it for one filter. It is necessary to prepare a total form of numbers. [0007] Also, due to the strength in the width direction of the cut and raised, the width direction is 1
Since the width of each piece is about 20 mm and 12 pieces are arranged, in the case of the above-described filter size (width 298 mm, length 342 mm), the number of cutting and raising blades of the total form is 120 × 12 = 1440, and this number It is very difficult to match the upper and lower dies with the cut-and-raised parts with high accuracy, and even one single die is very expensive. Further, the press machine also needs to apply 120 times as much pressure as when processing one line at a time. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and an object of the present invention is to provide a filter having improved strength for preventing torsional deformation . [0008] [Means for Solving the Problems] technical measure taken by the present invention to achieve the above object, the thin metal plate of a predetermined shape, and Tate設a plurality of slits at a predetermined pitch, The entire tongue piece formed between these slits is refracted and inclined in one direction and provided without leaving a flat portion between the slits.
Was a vent formed vents as one block, each block respectively surrounded by flat connecting portions of the width of narrowed to the extent that they do not twist the thin metal plate, each block in this state <br/> aspect A plurality of filters are arranged in a grid in the direction
Each of the ventilation portions of the filter alone is provided with a plurality of cutouts.
Combination by upper and lower block type press operation with
Simultaneous molding of several rows of vents and only the vertical width of the block type
A single filter or a combination of two or more filters characterized by being formed by repeating the operation of feeding a thin metal plate
The gist is a range hood filter . 1 above
The number of cut-and-raised vents formed in the block is, for example, 8 to 10 rows in the length direction, and the width of the plane portion between the blocks in the length direction is the minimum thickness of a commonly used material. Is necessary, for example, 0.5 mm to 5.0 mm. [0010] According to the above means, a ventilation portion formed by a plurality of cut-and-raised ventilation holes is used as one block and is narrowed within a metal sheet of a predetermined size to such an extent that the metal sheet is not twisted.
Due to the arranging a plurality of blocks in a grid pattern to vertical and horizontal direction in the thin metal plate in a state of being surrounded by the flat connecting part of the meta-width, flat connecting portion while securing high fat content repair efficiency reinforcement It functions as a crosspiece to prevent the filter from being twisted and deformed. Further, each of the ventilation portions of the filter alone is
For upper and lower block type press operation with cutting and raising blades
Simultaneous molding of multiple rows of vents and vertical width of the same block type
It is formed by repeating the operation of sending only a thin metal plate
Therefore, the number of press workings is reduced to shorten the working time
You. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a range hood equipped with a filter. In the figure, reference numeral 1 denotes a hood having an open lower surface, which comprises a hood body 1a having an open lower surface and a front surface, and a front plate 1b for closing the front opening thereof. A filter 3 is detachably mounted in the hood 1 over a front edge of a partition plate 2 erected and fixed over a back plate and left and right side plates of the hood main body 1a and a front edge of a top plate. A blower unit 4 is accommodated and installed in a space defined by the partition plate 2 and the hood main body 1. As shown in FIG. 2, in the filter 3, a plurality of rows (eight rows in the drawing) of slits are vertically provided at a predetermined pitch on a thin metal plate a having a rectangular planar shape. The entire tongue segment defined by the arrow is refracted and inclined in one direction, leaving no flat portion between the slits.
Is provided as one block A, and this block A
Are arranged in a grid pattern in the vertical and horizontal directions via the planar connecting portions 6 and 6 ′ of a predetermined size to form a filter unit. In the illustrated embodiment, the width of the planar connecting portion 6 (a portion that can be used as a material allowance during press working) provided between the blocks along the length direction of the metal thin plate a is set to the metal thin plate a.
Is smaller than the width of the planar connecting portion 6 ′ provided between the blocks along the width direction, but the flat connecting portion 6 usually requires a minimum plate thickness, for example, 0.5 mm to 5.0 mm. 0mm
And The pitch of the vertically installed slits is 2-5mm
The vertical width of the vent is 1-3 mm. Therefore, when the size of the filter 3 is 298 mm in width and 342 mm in length, for example, the width direction is 12 rows as in the conventional case, and the length direction (press feed direction) is 8 rows for each row, and each row has one block. None, 14 blocks each are formed in the length direction.
The number of air vents in one row in the length direction is 112 (8
× 14), which is less than the 120 conventional products, but there was no difference in terms of effect. Next, a method of manufacturing the above-described filter 3 will be described with reference to the drawings. As shown in FIGS. 5 and 6, the upper die 7 and the lower die 7 are sandwiched by a strip a ′ made of a long metal thin plate a. A mold 7 'is arranged, and the upper mold 7 includes a block mold 8 having a plurality of saw-toothed cutting and raising blades 8a and material holders 9, 9' arranged before and after in the longitudinal direction of the block mold 8. The block die 8 has a separate structure from the material pressers 9 and 9 ', and is separately slidable up and down. The lower die 7 'is provided opposite to the block die 8' provided with the cutting and raising blade 8b which meshes with the cutting and raising blade 8a of the block die 8 of the upper die 7 and the material pressers 9, 9 '. And flat receiving portions 10 and 10 '. In this embodiment, the upper and lower dies 7, 7 'are used.
The rows (numbers) of cutting and raising blades 8a and 8b in the length direction (feed direction) formed on the block dies 8 and 8 'in FIG. 3 are the eight rows shown in FIGS. Twelve are arranged in parallel at intervals corresponding to the portion 6 '. In the above-mentioned press working with the die, a strip a ′ of a material is inserted between the upper and lower dies 7, 7 ′, and the strip a ′ is inserted.
Is pressed by the material pressers 9, 9 'and the flat receiving portions 10, 10' of the lower die 7 ', and in this state, the block die 8 of the upper die 7 is processed in a direction in which it engages with the block die 8' of the lower die 7 '. When pressed, the material strip a ′ has 8 rows in the length direction and 12 rows in the width direction, for a total of 9 rows.
The ventilation holes 5 formed by cutting and raising six pieces are formed by one press working. Therefore, the filter 3 having a desired length can be formed by repeatedly performing the pressing operation and the material feeding operation. In addition, since the vents are formed in units of blocks, the change in the longitudinal direction of the filter can be simply performed at a length pitch obtained by adding the length of one planar connecting portion to the length of one block. be able to. Furthermore, it is possible to cope with intermediate dimensions by changing the width of the edges at both ends along the length (feed) direction of the filter. Next, a comparison will be made of the processing time between the above-described manufacturing method and the conventional manufacturing method of processing one row at a time. The press machine used for processing is a 400-ton press machine in both the above-described manufacturing method and the conventional manufacturing method.
It is assumed that the motor is operated at 00 SPM (stroke / minute). The size of the filter to be processed is 298 mm in width,
With a length of 342 mm, the present invention has a lengthwise vent of 112 mm.
In the conventional method, the lengthwise vents are 120 rows. (A) Processing time of the present embodiment Since the present invention has 14 blocks in the length direction, the processing time of the vent is (60 seconds / 200 strokes) × 14 strokes = 4.2 seconds. Since the feed time of the plate is 2.8 seconds, the processing time of one filter including the feed time of the material is 4.2 seconds + 2.8 seconds = 7.0 seconds. (B) If the conventional processing time of 120 rows is processed one by one, the processing time is (60 seconds / 200 strokes) × 120 strokes = 36 seconds, and the feeding time of the material strip is 2.8 seconds. The processing time of one filter including the feed time of the material is 36 seconds + 2.8 seconds = 38.8 seconds. Therefore, although the conventional method requires 38.8 seconds as the processing time, the present embodiment In the method , the processing time is 7 seconds, and the processing time is reduced to 1 / 5.5 of the conventional method. According to the filter of the present invention,
Each of the ventilation portions formed by a plurality of cut-and-raised vents is surrounded by a flat connection portion having a width dimension reduced to a degree such that the metal thin plate is not twisted in a metal thin plate having a predetermined size as one block. The blocks are gridded in the vertical and horizontal directions of the same metal sheet
It has one cutting and raising blade because it is arranged in multiple shapes
The upper mold and lower mold have a predetermined space in the width direction of the long strip.
And raise the strip one row at a time, then feed the strips one row at a time and then raise one row
Then, it is formed by cutting to a predetermined length by repeating this
As with the conventional range hood filter, the amount of flat area is small.
It can be twisted and deformed without tension
And a high efficiency in collecting oil and fat
The plane connecting part surrounding one block plays the role of a reinforcing bar
As a result, the strength of the filter can be improved . Therefore, it is possible to use a material having a smaller thickness than a conventional product as a material for the filter, and it is possible to reduce the manufacturing cost. Also on
The ventilation part is an upper and lower block with multiple cutting and raising blades.
Simultaneous molding and simultaneous molding of multiple rows of vents by pressing the mold
Repeating the operation of feeding a metal thin plate of the lock type vertical width
Press-forming process
Therefore, the processing time can be greatly reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a range hood provided with a filter. FIG. 2 is a plan view showing an example of an embodiment of a filter according to the present invention. FIG. 3 is an enlarged plan view showing a portion surrounded by a circle in FIG. 2; FIG. 4 is a sectional view taken along line (4)-(4) in FIG. FIG. 5 is a plan view showing the production of the filter according to the present invention. FIG. 6 is an enlarged sectional view taken along line (6)-(6) of FIG. FIG. 7 is a cross-sectional view showing a conventional processing method. [Description of Signs] 3 ... Filter 5 ... Vents 6,6 '... Flat connection parts 8,8' ... Block type

Claims (1)

(57) to the Claims 1] predetermined shape of the metal sheet, and Tate設a plurality of slits at a predetermined pitch, between these slits each other
The whole tongue formed by refracted inclined in one direction the form of a vent provided without leaving the flat portion between the slits each other
The formed ventilation portion is made into one block, and each block is surrounded by a plane connecting portion having a width dimension narrowed to such an extent that the metal thin plate is not twisted , and each block in this state is grid-shaped in the vertical and horizontal directions .
To form a filter unit.
Each of the ventilation sections of the single unit is provided with a plurality of cutting and raising blades.
Identify multiple rows of vents by pressing the bottom block
Sends a thin metal plate of the same length as the block formed during time forming
A filter characterized by being formed by repetition of operation
A filter for a range hood made of ruta alone or a combination of multiple pieces .