JPH0536694B2 - - Google Patents

Description

[Detailed Description of the Invention] I. Purpose of the Invention (1) Industrial Field of Application The present invention relates to a damper interposed between a duct installed on a ceiling board of a building, and particularly a damper for adjusting air volume. Regarding.

(2) Prior Art In order to adjust the air volume in an air conditioning duct, a mechanism is known in which a damper is interposed in the middle of the duct and the damper blades of the damper are opened and closed.

FIG. 7 is a schematic perspective view of the conventional air volume adjusting damper. As seen in the figure, such a damper consists of a box frame F having a required width in the thickness direction, and this frame F. A rotating shaft S is rotatably supported by a bearing provided inside, and a frame F is fixed to this rotating shaft S.
A blade V that rotates to open and close the ventilation hole inside, and a connecting part L that connects and drives the blade V to a predetermined opening at the same time.
and an external drive mechanism Do consisting of a handle and a worm gear mechanism connected to one of the rotational shafts of the blades V to drive the blades to open and close from the outside.

(3) Problems to be Solved by the Invention However, according to the above-mentioned configuration, although the functional requirement is to be able to adjust the air volume accurately, the structure requires a connecting part and an external drive mechanism. It is complicated and requires a large number of parts, resulting in high costs, and it also has the disadvantage that it is difficult to individually adjust the opening of each blade to a desired opening depending on the downstream wind direction.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to significantly reduce costs with a simple configuration and to individually adjust the opening degree of each blade to an arbitrary opening degree. This will provide an improved air volume adjustment damper that can.

Structure of the invention (1) Means for solving the problems In order to achieve the above object, the present invention provides a duct 1
a damper frame 14 interposed between the two;
A vane 24 provided on the damper frame 14, which rotates independently around a support shaft 22 without using an external drive mechanism such as a handle or gear, and whose opening degree can be set;
The air volume adjusting damper 10 includes an operation port 16 provided in the duct 12 in close proximity to the damper frame 14, and allows the blades 24 to be manually adjusted to any opening degree directly from the operation port 16.

(2) Function A spindle is provided on the damper frame, and the blades rotate independently around the spindle without using an external drive mechanism such as a handle or gear, and the opening degree can be set, and the damper frame. An operating port is provided in the duct close to the duct, and the blade can be manually adjusted to any rotation directly from the operating port, which simplifies the structure and allows for highly efficient air volume adjustment.

In particular, in the present invention, mass production and automation can be realized, and pressure loss can be minimized by forming the blades and the spindle by integral press molding from a thin plate along the slit pattern. Also,
Since the damper body itself is formed into a thin plate, it is lightweight and compact. Furthermore, product management, on-site storage, transportation, etc. are facilitated. Furthermore, since the blades and the outer frame are integrally fixed, there is no noise such as rattling at the blade bearings. Furthermore, the work of attaching and detaching from the duct is easily accomplished. In addition, even if the support shaft becomes rusty, the blades can be rotated and adjusted.

(3) Embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, FIG. 1 shows the first embodiment of the present invention.
1 is a schematic overall perspective view of an air volume adjustment damper 10 according to the present invention, and as shown in the figure, a damper frame 14 is provided interposed between a duct 12, and
An operation port 16 is provided on the side surface of the duct 12 adjacent to the damper frame 14. This operation port 16 is usually screwed to a lid, and as will be described later, when necessary, the operator removes the lid and manually opens and closes the blades.

Figures 2 and 3 show the damper frame 14 in this embodiment.
FIG. 2 is a front view and a cross-sectional view of the device, and as shown in the figures, the frame and the blades are extremely simply constructed so that they can be integrally molded.

That is, in the figure, for example, an outer frame portion 18 is provided on the rectangular outer periphery of a thin steel plate, and slits 20 are carved in parallel and adjacent to each other by combining U-shaped patterns p1 and I-shaped patterns p2. These slits are formed by integral molding using a press. A slit discontinuous portion 100 is formed in the adjacent portions of both ends of these U-shaped and I-shaped p1, p2.
The part surrounded by the slit pattern is the outer frame part 18
is connected to. This slit discontinuous portion 100 forms a support shaft portion 22, and the U-shape and I
The portion surrounded by the letter-shaped slit patterns p1 and p2 forms the blade 24. Further, from the slit ends of the U-shaped and I-shaped slits p1 and p2, cuts 26 of a required length are provided so as to face each other in the direction of the spindle of the spindle 22. 24 is capable of twisting and rotating at least 180° about the support shaft portion 22. Each of these blades 24 twists and rotates independently of the other blades and independently in any rotational direction without the intervention of an external drive mechanism, and sets the opening degree. It has been experimentally proven that the support shaft portion 22 can withstand twisting movements up to about 100 times by providing the notch 26. Therefore, like an air volume adjustment damper used in a duct system, once the opening of the blades is adjusted, it has sufficient durability as a damper that is not frequently adjusted thereafter.

Note that the blade 30 only needs to be able to rotate at least 180 degrees, so a stopper mechanism such as a protrusion may be provided on the side of the duct so that it can rotate within a certain range of 180 degrees from the fully closed state, or a stopper mechanism such as a protrusion may be provided on one side of the blade in the fully closed state. Thick lines are drawn to serve as landmarks.

Further, after the press working of the thin plate, galvanizing is performed. Therefore, it is possible to form an air volume adjustment damper with excellent rust prevention effect, and its galvanizing is easier and cheaper than conventional ones.

Here, not only an external drive mechanism such as a handle or a worm gear mechanism, but also a blade connecting mechanism is not required, and the blades 24 can be adjusted and set to any opening degree.

Although the notches 26 are carved inward so as to face each other, they may be carved outward so as to separate from each other. Two-character shapes may be carved on both sides of the same end so as to interrupt the connection between the two ends.

In this embodiment, in particular, the blade 24 and the support shaft portion 22 are simultaneously formed by forming the slit pattern S from one thin steel plate by integral press molding. Therefore, first, the damper frame itself is not a box, but is formed from a single thin plate together with the blades, resulting in a dramatic reduction in material costs.

In addition, mass production and automation are possible, and work costs are dramatically reduced.

Furthermore, since there is no protruding part on the blade shaft, there is no pressure loss, and the air volume can be adjusted efficiently.

Furthermore, since the damper body itself is formed as a thin plate, the overall weight is extremely light and the volume is not bulky. As a result, product management, on-site storage, transportation, etc. can be easily performed.

Furthermore, since the blades and the outer frame are integrally fixed, there is no noise such as rattling at the blade bearings.

Furthermore, the work of attaching to and removing from the duct can be easily performed, eliminating loss of work time and complexity.

In addition, even if the support shaft becomes rusty, the blades can be rotated and adjusted.

In addition, although the above embodiment shows a U-shaped and I-shaped slit pattern configuration, slits may be carved in various other patterns or a combination thereof, and a single slit pattern that twists and rotates about the support shaft may be used. The damper frame and the blades may be configured to be integrally molded from one thin plate so as to form a rotating blade structure. Therefore, a desired blade shape can be formed by combining arbitrary slit patterns, such as straight and arcuate slits, trapezoids, triangles, and star shapes.

When installing such an air volume adjustment damper in the middle of a duct, as shown in Fig. 2, insert a gasket or the like into the bolt hole drilled in the outer frame 18 so that it matches the mounting position of the duct. Tighten the bolts as shown in Figure 1.

Adjustment of the opening of the blades 24 is carried out by the operator removing screws from the lid that closes the operating port 16 and directly inserting his arm into the duct.

Figures 4a, b, c, and d show examples in which the opening degrees of the blades 24 can be individually and independently adjusted. When all the blades are set to a certain opening degree with respect to the wind direction, the figure c shows that the airflow at the upper part of the opening is suppressed while flowing parallel to the wind direction to the low pressure side, and the airflow is suppressed at the lower part of the opening while flowing into the duct. When flowing toward the low pressure side along the wall edge, Figure d shows the case where each blade is randomly adjusted to an arbitrary opening degree.

In particular, as can be seen in FIG. 4B, it is understood that in this embodiment, pressure loss is prevented to the utmost due to the flat plate-like configuration without a vane shaft.

As shown in Fig. 4e, the outer frame of the thin plate may be bent and the bent portion may be directly bolted to the duct wall. It is possible to install the duct at any position within the duct without requiring an airtight packing.

Next, a second embodiment of the air volume adjusting damper according to the present invention will be described with reference to FIG. 5, and the same members as in the first embodiment will be denoted by the same reference numerals and their explanation will be omitted.

In this embodiment, the outer frame portion of the damper frame 14 and the blades are formed separately, and in the figure, the support shaft portion 2 of the blade 30 that opens and closes the internal ventilation hole of the outer frame portion 28 is shown.
2 includes a support shaft 32 fixed to the side end of the blade 30, and a recessed portion fixed to the outer frame portion 28 so as to press the shaft end of the support shaft 32 against the outer frame portion with a required pressing force. An L-shaped support bearing seat 34 is provided. These support shafts 32 and support bearing seats 34 are fixed to the blades 30 and the outer frame portion 28 by spot welding or the like. Here, the support shaft bearing seat 34 and the support shaft 32
are fitted with the required force, and the operator can manually rotate the blade 30 and maintain the blade 30 at the set opening.

Incidentally, the protruding piece of the L-shaped support bearing seat 34 functions as a stopper for restricting rotation in a certain opening direction.

Therefore, each blade can be adjusted to any opening degree independently from the other blades, and therefore an external drive mechanism or connection structure is not required. That is,
The opening degree of the blade 30 is manually adjusted by the operator through the operation port 16 as in the previous embodiment.

FIG. 6 shows the third part of the air volume adjustment damper according to the present invention.
This embodiment shows an embodiment, which will be explained below, but the same members as in the previous embodiment are given the same reference numerals and the explanation thereof will be omitted.

In this embodiment, the spindles 22 provided at both ends of the blade 30 have different configurations, and are composed of a first spindle 22a and a second spindle 22b.

The first support shaft portion 22a includes a support shaft 36 and a support bearing seat 38.
including. The support shaft 36 has an end on the side of the blade 30 fitted into a groove of a grooved cylindrical body, and a shaft 40 protruding from the other end. Furthermore, notches 40a are formed at both ends of the shaft 40 to facilitate fitting and mounting of the shaft 40 to the support bearing seat 38. Outer frame part 1
A support bearing seat 38 for pivotally supporting the support shaft 36 is provided on the 8 side, and the support bearing seat 38 has a groove of a grooved cylindrical body fitted into an end portion of the outer frame portion 18. At the other end, a fitting hole 42 into which the shaft 40 of the support shaft 36 is fitted is formed in the shape of a keyhole with a notch 42a in the radial direction.

The support bearing seat 38 and the support shaft 36 are fitted together with the required fitting force, and the blade 3 is manually fitted by the operator.
0 can be rotated, and the set opening degree is set to such an extent that the opening degree can be reliably maintained even under the pressure of the air flow.

Further, a second support shaft portion 22b is provided on the other end side of the blade 30 facing the first support shaft portion 22a, and this second support shaft portion 22b has a groove of a grooved cylindrical body at the side end of the blade 30. A support shaft 44 that is fitted and has a shaft 46 protruding from the other end, and a hole 46a that fits into the groove of the grooved cylindrical body on the outer frame 28 side and that supports the shaft 46 by inserting it into the other end. It has a supporting bearing seat 48 formed therein. A spring 50 is inserted into the hole 46a of the support shaft receiving seat 48, and the spring 50 urges the blade 30 toward the first support shaft portion 22a.

Here, the operator can directly adjust the blade to an arbitrary opening degree by inserting his or her arm through the operating port 16 without requiring an external drive mechanism, blade connection mechanism, or the like.

Next, a fourth embodiment of the air volume adjusting damper according to the present invention will be described with reference to FIG. 7. The same members as those in the previous embodiment are denoted by the same reference numerals, and the explanation thereof will be omitted. In this embodiment, unlike the first embodiment, the outer frame portion and the blades are constructed separately. That is, 54 that opens and closes the ventilation hole in the rectangular outer frame 52 includes a blade body 56 and a support shaft portion 58 formed to protrude from both ends of the blade body 56 . A cut groove 60 having a required length is cut from the base end of the support shaft portion 58. By fixing this support shaft portion 58 to the outer frame 52 by spot welding or the like, the blade 54
The whole is fixed to an outer frame 52. Here, similarly to the first embodiment, the blades 54 can be individually twisted and rotated, and an arbitrary opening degree can be set. The method of operating the blade 54 is the same as in the first embodiment, and almost the same effects can be obtained.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be rotated independently without using an external drive mechanism, and can be manually operated by an operator from an operation port provided close to the damper frame. It includes all damper mechanisms whose blade opening can be adjusted.

Effects of the Invention As explained above, according to the air volume adjustment damper according to the present invention, the damper is provided in the damper frame and rotates independently around the support shaft without using an external drive mechanism such as a handle or gear, and A blade whose opening degree can be set,
By providing an operation port in the duct close to the damper frame, there is no need for an external drive mechanism or blade connection mechanism, which not only enables a simple configuration and significant cost reductions, but also allows for greater control over the opening of each blade. Since the opening can be adjusted individually to any desired opening degree, the user's needs for air volume adjustment can be fully realized.

In particular, the present invention can be mass-produced by forming the slit pattern from a thin plate by integral press molding, and simultaneously forming the blade plate and the support shaft.
Automation is possible, dramatically reducing work costs, and there is no pressure loss, making it possible to efficiently adjust air volume.

Furthermore, since the damper body itself is formed as a thin plate, the overall weight is extremely light and the volume is not bulky. As a result, product management, on-site storage, transportation, etc. can be easily performed.

Furthermore, since the blades and the outer frame are integrally fixed, there is no noise such as rattling at the blade bearings.

Furthermore, the installation and removal work to the duct can be easily performed, which eliminates the loss of work time and complexity.

In addition, even if the support shaft becomes rusty, the blades can be rotated and adjusted.

[Brief explanation of the drawing]

1 to 5 are diagrams showing a first embodiment of the present invention, in which FIG. 1 is an overall schematic perspective view of the air volume adjustment damper, and FIG. 2 is a front view of the damper frame, and FIG. 3 is a sectional view of the same, FIGS. 4a to 4d are explanatory diagrams of the opening state of the same blade, FIG. 4e is an explanatory diagram of the case where the outer frame portion of the thin plate is bent, and FIG. is a partially enlarged explanatory diagram showing a second embodiment of the present invention,
FIG. 6 is a partially enlarged explanatory diagram showing the third embodiment;
FIG. 7 is an explanatory diagram showing the fourth embodiment, and FIG. 8 is a diagram showing a conventional air volume adjustment damper. 10... Air volume adjustment damper, 12... Duct,
14...damper frame, 16...operation port, 24...
Feather.

Claims (1)

[Scope of Claims] 1. A damper frame provided in the middle of the duct, and a damper frame provided on the damper frame that rotates independently around a support shaft without the use of an external drive mechanism such as a handle or gear, An air volume adjustment damper comprising a blade whose opening degree can be set and an operation port provided in a duct close to the damper frame, and which allows the blades to be manually adjusted to an arbitrary opening degree directly from the operation port. 2. The damper frame and the blades are made by carving slits in various patterns or combinations of them in a thin plate so as to form the blades and a support shaft part that is the axis around which the blades rotate, and using the support shaft part as an axis. The air volume adjusting damper according to claim 1, wherein the damper frame and the blades can be integrally molded from one thin plate so as to form a single rotating blade structure that swings and rotates. 3 The damper frame and the blade have an outer frame portion on the outer peripheral edge of a thin plate, and slits are carved in parallel in a combination of U-shaped and I-shaped patterns, and both ends of the U-shaped and I-shaped Form discontinuous slit portions in mutually adjacent portions and use these as supporting shafts of the blades, and extend the required length from the U-shaped and I-shaped slit ends in mutually opposing directions in the supporting shaft direction. A notch is provided so that the damper frame and the blades are connected to one another so as to form an independent rotating blade structure that twists and rotates around the support shaft.
The air volume adjusting damper according to claim 1, which is integrally molded from two thin plates.