JP2944497B2 - Predetermined angle rotation mechanism and damper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a predetermined angle rotating mechanism which can rotate an object at a predetermined angle and maintain each rotation state within a required range. The present invention relates to an actuated damper device.

[0002]

2. Description of the Related Art In recent years, the airtightness of buildings has been increasing, and when air is exhausted by a ventilation fan or the like, the air is automatically ventilated in response to the exhaustion of the room by the exhaustion of the ventilation fan to take in the outside air. Type damper devices are widely used.
Such a differential pressure actuated damper device is disclosed, for example, in Jpn.
As seen in 3-122115 (Japanese Utility Model Laid-Open No. 2-44640), a butterfly damper composed of a pair of semicircular damper blades is configured to be opened and closed according to the pressure difference between the inside and outside of the room. When the air pressure in the room decreases, it functions to introduce outside air into the room according to the decrease in the air pressure. For such a differential pressure actuated damper device, it is desired to be able to lock so as not to open the damper blade when the introduction of outside air is not desired,
The locking means for that purpose is also disclosed in Japanese Utility Model Application No. 63-1221.
No. 15 discloses.

The locking means in Japanese Utility Model Application No. 63-122115 is brought into a locked state by bringing an element for regulating the opening operation of the butterfly damper into contact with each damper wing.
By releasing this contact, the lock is released, and the contact element that contacts the damper wing rotates in the direction crossing the surface of the closed damper wing, By rotating in parallel with the surface of the damper wing, it can make contact when necessary. Operation strings and knobs for causing these contact elements to perform a rotating operation are led out of the apparatus, and the locking means is operated through these.

[0004] Such a lock means has no problem in operability and functionality, but has a problem in design. That is, the operation string and the knob portion are exposed to the outside of the decorative cover of the device, and this limits the design.

[0005] Such a design problem is not limited to the case of the differential pressure actuated damper of the ventilation following type described above.
This also applies to a manual differential pressure operated damper device for manually opening and closing damper blades. In other words, there is a problem that the operating means for manually operating the damper blade is exposed outside the decorative cover of the apparatus.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a mechanism for minimizing design restrictions as locking means for damper blades or opening / closing operation means for damper blades in a differential pressure actuated damper device as described above. As a locking means, especially as a mechanism to rotate the contact element to the damper wing in parallel with the damper wing, it was obtained as a mechanism to make the contact element rotate. When used, in the unlocked state, which is the normal state, it is possible to substantially eliminate the portion exposed to the outside of the decorative cover of the device. It is an object of the present invention to provide a predetermined-angle rotating mechanism capable of substantially eliminating a portion exposed to the outside of a decorative cover of the device.
Further, the present invention includes a ventilation follow-up type differential pressure actuated damper device including the above-described predetermined angle turning mechanism as an element of the locking means, and the above-described predetermined angle turning mechanism as an element of the opening / closing operation means. It is intended to provide a manually operated damper device.

[0007]

SUMMARY OF THE INVENTION A predetermined angle rotating mechanism according to the present invention rotates a predetermined angle by repeating a pushing operation from the same direction, and a rotating member having a pinion gear at one end. A first support member provided with a bearing portion rotatably supporting the rotating member, a slide member provided with a rack gear corresponding to a pinion gear of the rotating member and provided with a locking projection, A biasing means, and a second support member rotatably provided with a holding body having a guide groove of a predetermined shape forming a locking portion, and the sliding member is moved backward by the biasing means. The first and second supporting members are held between the first and second supporting members in a state where a bias is applied in the direction, and the sliding member is slid forward by a pushing operation against the urging force of the urging means. Locking protrusion of slide member While pressing against the outer periphery of the holding body, it is rotated to enter the guide groove and to be locked in the locking portion, whereby the slide member is pressed against the urging force of the urging means by a predetermined amount. The forward slide position is maintained, and the locking is released by further pressing in this state,
As a result, the slide member slides backward by the urging force of the urging means to return to the initial state, and the pinion meshes with the rack gear of the slide member with a series of forward slide and backward slide of the slide member. The gear causes the rotating member to rotate at a predetermined angle.

Further, the ventilation-following differential pressure actuated damper according to the present invention includes a pair of semicircular damper blades, and these two damper blades are naturally opened according to the reduced pressure on the indoor side. And a locking means having a rotatable abutment, wherein the abutment restricts the opening operation of both damper wings when the abutting body is in a rotating state. The above-mentioned predetermined angle rotation mechanism is used as the rotation operation mechanism.

The manually operated damper device according to the present invention includes a pair of semicircular damper blades, and the two damper blades are opened and closed by rotation. The above-mentioned predetermined angle rotation mechanism is used.

In the above-described predetermined-angle rotating mechanism according to the present invention, the rotating member rotates by a predetermined angle only by repeating the pushing operation of the slide member from the same direction. Therefore, for example, as described above, when used as a locking means in a differential pressure actuated damper device, the contact member connected to the rotating member needs only the pushing operation of the sliding member in the same direction to perform the necessary rotating operation. Can be performed. Therefore, as long as the end surface of the slide member can be pressed from the outside of the decorative cover, the operation can be performed, and for example, a portion that is exposed to the outside of the decorative cover in a normal unlocked state, which is a normal state, can be substantially formed. It is possible to reduce the design constraint elements.

As described above, the predetermined angle rotating mechanism according to the present invention exhibits the above-mentioned usefulness with respect to the locking means and the opening and closing operation means in the butterfly damper type differential pressure actuated damper device, but also applies to other devices. The utility according to the usage there can be exhibited.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the first embodiment of the present invention is applied to a locking means of a differential pressure actuated damper device will be described below. As shown in FIG. 1, the predetermined angle rotation mechanism according to the present embodiment includes a rotation member 1, a first support member 2, a second support member 3, a slide member 4, and a compression coil spring 5. Becomes

The rotating member 1 has a shaft structure in which a pinion gear 7 is provided at one end and a contact member 24 of a differential pressure actuated damper device described later is connected to the other end.

The first support member 2 is formed in a flat and elongated box shape, and a bearing portion 8 for rotatably supporting the rotating member 1 at the center thereof is projected outward. At the same time, a spring supporting portion 9 for supporting one end of the compression coil spring 5 in a sandwiching manner is provided on the base end side.

The second support member 3 has a width that can be fitted into the first support member 2 and is formed in an elongated box shape that is flatter than the first support member 2. An auxiliary guide groove 1 is provided on the base end side to guide the locking projection 17 when the slide member 4 described later slides back and forth.
0 is formed, and the holding body 11 is provided on the tip side. As shown in FIG. 2, the holding body 11 has a guide surface 11f on the outer periphery which is inclined upward from the distal end to the proximal end, and a support pin for stopping the guide surface 11f at the proximal end. Rotation as indicated by arrows X and Y is enabled with the fulcrum 12 as a fulcrum, and the rotation is urged in the direction of arrow X by a torsion coil spring 13 for rotation urging means. Holder 1
1 is provided with a guide groove 15 having a shape including an S-shaped curved portion whose first bent portion serves as a locking portion 14.

The slide member 4 allows the first support member 2 and the second support member 3 to be held between the first support member 2 and the second support member 3.
The support member 3 is slidably regulated inside the support member 3 so as to perform a forward slide as shown by an arrow Sa and a backward slide as shown by an arrow Sb. A gear wall for forming a rack gear 16 is provided in a protruding state at the tip end thereof, and a locking projection 17 is provided by protruding in the opposite direction to the gear wall, and further, a spring support portion 9 of the first support member 2 is provided. Compression coil spring 5 in pairs
Is provided with a spring support portion 18 for holding the other end of the spring in a sandwiched manner.

The compression coil spring 5 is used for biasing means of the slide member 4, and each end is supported by the spring support 9 of the first support member 2 and the spring support 18 of the slide member 4 as described above. By doing so, the biasing force in the backward slide direction is applied to the slide member 4 in relation to the first support member 2.

The turning member 1 in the predetermined angle turning mechanism
Is rotated as follows. When the slide member 4 is slid forward by pushing it in the forward slide direction (the direction of the arrow Sa) against the urging force of the compression coil spring 5,
As shown in FIGS. 2A and 2B, the locking projection 17 presses the holder 11 against the guide surface 11f and turns in the direction of the arrow Y against the urging force of the torsion coil spring 13. Move. When the locking projection 17 reaches the entry end of the guide groove 15, the locking projection 17 enters the guide groove 15 from there, and is locked to the locking portion 14, whereby the holding body 11 is attached to the torsion coil spring 13. The slide member 4 is supported in a state of being inclined against the urging force, and as a result, the slide member 4 maintains a predetermined forward sliding position against the urging force of the compression coil spring 5.

During this time, the rotating member 1 is moved from the state in which the contact member 24 connected thereto assumes the rotating angle state shown by the solid line in FIG. 1 to the pinion engaged with the rack gear 16 of the sliding member 4. Rotation by 90 ° is performed by the gear 7, and this rotation state is maintained (the state shown by the two-dot chain line in FIG. 1).
In this state, when the slide member 4 is further pressed lightly, the locking projection 17 comes off the locking portion 14 and at the same time, the holder 1
1 rotates in the arrow X direction by the urging force of the torsion coil spring 13. As a result, as shown in FIG. 3 (C), the locking projection 17 can come out of the guide groove 15, and the slide member 4 automatically slides backward in the direction of the arrow Sb by the urging force of the compression coil spring 5, Return to the initial state. With this operation, the rotating member 1 makes a 90 ° rotation, and returns the contact body 24 to the state shown by the solid line.

As shown in FIG. 3, a differential pressure actuated damper device incorporating the above-described predetermined angle rotating mechanism is provided with a pair of semicircular damper blades 2 on a hinge shaft 21 extending across a cylindrical body 20.
It has a structure provided with a butterfly damper 23 which supports two and 22 (only one is shown in the figure), and is used by being installed on a wall of a building or the like, and the inside R is depressurized. Accordingly, the butterfly damper 23 is opened (a state in which the damper blades 22 are standing as shown in the figure) to allow ventilation inside and outside the room. Further, the differential pressure actuated damper device includes a lock unit for restricting the butterfly damper 23 from being opened.

The predetermined angle rotation mechanism forms one mechanism element of the lock means, and the contact damper 24 is rotated to a predetermined state by the predetermined angle rotation mechanism, whereby the butterfly damper 23 is opened. This is restricted to a locked state, and the locked state is released. Specifically, the contact body 24 has contact portions 24t at both ends,
24t, the contact portions 24t, 24t are moved from the opening direction side by being set in a rotation state (a state shown by a solid line in FIGS. 1 and 3) orthogonal to the hinge shaft 21 by a predetermined angle rotation mechanism. The damper blades 22 are brought into contact with the damper blades 22 and 22 to restrict the opening operation of the damper blades and lock the same, and are rotated on the hinge shaft 21 in parallel with the hinge shaft 21 by a predetermined angle rotation mechanism (FIGS. 1 and 3). The locked state is released by taking the state shown by the two-dot chain line in FIG.

The contact body 24 has a level difference between the surface of the damper blade 22 and the surface of the hinge shaft 21, and moves forward and backward to cope with this level difference. As shown in an enlarged view in FIG. 4, a mechanism for connecting the distal end member 1a to the distal end portion of the rotating member 1 so as to be able to advance and retreat as shown by the arrow Z, and a pressing contact projection 1b provided on the distal end member 1a. Is pressed against an advance / retreat guide surface 25 formed on the distal end surface of the bearing portion 8 by a spring 26 or the like. The contact member 24 is selectively pressed against the portion 25r or the forward guide 25p, thereby causing the contact body 24 to move forward and backward in conjunction with the rotation state.

In such a differential pressure actuated damper device, the predetermined angle rotating mechanism that causes the contacting body 24 to perform the above-described series of rotating operations operates as described above. For example, the contact member 24 locks the damper wings in the initial state where the slide member 4 is retracted, and the end of the slide member 4 in the forward state is the decorative cover 27 of the differential pressure actuated damper device. If it is made to be flush with the outer surface of the cover, a portion exposed to the outside of the decorative cover can be substantially eliminated in the unlocked state which is the normal state.

Next, a second embodiment of the present invention will be described. This embodiment is an example of a manual damper device having an opening and closing operation means. As shown in FIGS. 5 and 6, the first point is that the structure has a butterfly damper 23 in which a pair of semicircular damper blades 22 a and 22 b are pivotally supported on a hinge shaft 21 extending across the cylindrical body 20. Similar to the differential pressure operated damper device in the embodiment, the damper blade 22
a and 22b are manually opened and closed by opening and closing operation means.

In the opening / closing operation means, a part of the mechanism element is formed by the above-mentioned predetermined angle rotating mechanism. In particular,
By rotating the crown gear 30 connected to the rotating member 1 of the predetermined angle rotating mechanism, the gears 31a, 3
1b, the damper blades 22a, 22b connected to the respective gears 31a, 31b are correspondingly moved as shown in FIG.
It is rotated and opened and closed as indicated by arrows Sa and Sb in the middle.

[0026]

As described above, when the predetermined angle rotating mechanism of the present invention is used in a differential pressure actuated damper device, the portion exposed to the outside of the decorative cover is substantially eliminated. This can reduce design constraints.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a predetermined angle rotation mechanism according to a first embodiment.

FIG. 2 is a partial plan view showing a relationship between a slide member and a second support member when the predetermined angle rotation mechanism of FIG. 1 operates.

FIG. 3 is a sectional view of a differential pressure actuated damper device incorporating the predetermined angle rotation mechanism of FIG. 1;

FIG. 4 is a partially enlarged view of the differential pressure operated damper device of FIG.

FIG. 5 is a sectional view of a damper device incorporating the predetermined angle rotation mechanism of FIG. 1;

FIG. 6 is a perspective view of a main part of the damper device of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating member 2 1st support member 3 2nd support member 4 Slide member 5 Compression coil spring (biasing means) 7 Pinion gear 8 Bearing 11 Holder 14 Locking part 15 Guide groove 16 Rack gear 17 Locking projection 22 Damper wing 24 Abutment

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16H 19/04 F16H 21/16 F24F 7/10 F24F 13/15

Claims (3)

(57) [Claims] A rotating member having a pinion gear provided at one end; a rotating member having a pinion gear provided at one end; and a rotating member capable of rotating the rotating member. A first supporting member provided with a bearing portion for supporting the rotating member, a slide member provided with a rack gear corresponding to a pinion gear of the rotating member and provided with a locking projection, an urging means, and a locking portion And a second support member rotatably provided with a holding member having a guide groove of a predetermined shape for forming the slide member, and the slide member is biased in the backward slide direction by the biasing means. The first support member and the second
And the slide member is slid forward by a pushing operation against the urging force of the urging means, so that the locking projection of the slide member is pressed against the outer periphery of the holding body. Is rotated to enter the guide groove and to be locked in the locking portion, whereby the slide member maintains a predetermined forward slide position against the urging force of the urging means. By further applying a pushing operation, the lock is released, whereby the slide member is slid backward by the urging force of the urging means to return to the initial state, and a series of forward slides of the slide member are performed. And a pinion gear meshing with a rack gear of the slide member in accordance with the reciprocating slide, whereby the turning member turns by a predetermined angle. 2. A pair of semi-circular damper blades, wherein both damper blades are naturally opened according to the reduced pressure state on the indoor side, and have a rotatable contact body. Claims: A differential pressure actuated damper device comprising a lock means for restricting an opening operation of both damper blades in a rotating state of a contact body, wherein the rotation means of the contact body in the lock means is claimed. A differential pressure actuated damper device using the predetermined angle rotation mechanism according to claim 1. 3. The damper device according to claim 1, wherein the damper device includes a pair of semicircular damper blades, and the two damper blades are opened and closed by rotation. A damper device using a rotating mechanism.