JP2596457Y2 - Screen winding speed adjustment 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 screen winding speed adjusting device, and more particularly to a shock absorbing device.

[0002]

2. Description of the Related Art A conventional screen winding device 80 will be described with reference to FIG. When the screen 85 is wound up, the screen bar 86 of the screen 85 in the state of being used for pulling down is lifted in the arrow F direction. Thus, the lock is disengaged, the restoring elastic force of the auxiliary link 82 is spread in an arrow G direction, the coil scan purine grayed of MakiOsamu elastic and damping device E of the winding shaft 81 (not shown),
The screen 85 is wound up to the state shown by the dashed line in FIG.

The braking device E is a braking device used for a door closer. The restoring speed of the piston is reduced by the hydraulic pressure in the cylinder, and the returning speed of the auxiliary links 82 and 84, that is, the winding speed of the screen 85 is adjusted. Thereby, the collision between the screen bar 86 and the main body case B is prevented, and the impact is reduced.

[0004]

However, the above-mentioned screen winding device 80 has the following problems.

Since the auxiliary links 82 and 84 are provided to adjust the winding speed of the screen 85, the structure becomes complicated. Further, since the link mechanism is exposed outside the screen, the appearance is impaired.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a screen winding speed adjusting device which solves the above-mentioned problems and has a simple structure without exposure to the outside and capable of absorbing a shock at the time of screen winding. I do.

[0007]

According to a first aspect of the present invention, there is provided a screen winding speed adjusting apparatus comprising: a rotating shaft connected to a winding shaft of a screen; and a hollow portion formed along the axial direction of the rotating shaft. And a movable body having a sliding pair even relationship with the rotation axis and a sliding pair even relationship with the housing, and a movable body having a screw pair even relationship with the rotation shaft, wherein the hollow portion is a first body. A movable body that is divided into a fluid securing chamber and a second fluid securing chamber, a first fluid connecting passage and a second fluid connecting passage that connect the first and second fluid securing chambers, An operation that is provided in the first fluid connection passage and blocks movement of the fluid from the first fluid securing chamber to the second fluid securing chamber through the fluid connecting passage; And a valve.

[0008] In the screen winding speed adjusting device of the second aspect, the second fluid connection passage or the second fluid connection passage may further include:
The apparatus may further include a flow rate adjusting unit provided in the first fluid securing chamber or the second fluid securing chamber to change a flow rate of the fluid.

According to a third aspect of the present invention, in the screen winding speed adjusting device, the second fluid connection passage is composed of a plurality of passages, and any one of the plurality of fluid connection passages is movable. It is characterized in that the body is configured such that its passage is blocked by moving the hollow part in the axial direction.

According to a fourth aspect of the present invention, in the screen winding speed adjusting device, the flow rate adjusting section is provided in each of the second fluid connection passages.

[0011]

In the screen winding speed adjusting device according to the first aspect, the housing has a hollow portion formed along the axial direction of the rotating shaft, and has a turning pair relationship with the rotating shaft. . Therefore, when the casing is fixed, the rotating shaft rotates. Further, the movable body has a screw pair even relationship with the rotating shaft and a sliding pair relationship with the housing. Therefore, when the rotating shaft rotates with the rotation of the winding shaft of the screen, the movable body moves in a hollow portion formed along the axial direction of the rotating shaft.

The operating valve is configured to move a fluid from the first fluid securing chamber to the second fluid securing chamber (hereinafter referred to as a first fluid securing chamber).
The movement through the first fluid connection passage is blocked. Therefore, movement of the fluid in the first direction is limited to movement of the second fluid connection passage. That is, the moving speed of the movable body is determined by the moving speed of the fluid passing through the second fluid connecting passage.

In the movement of the fluid from the second fluid securing chamber to the first fluid securing chamber (hereinafter, referred to as movement in the second direction), the first fluid connecting passage is provided. Opens and moves through the passage of the fluid.

Accordingly, the moving speed of the movable body in the first direction is low, and the moving speed of the movable body in the second direction is high.

According to a second aspect of the present invention, the flow rate adjusting section changes the flow rate of the fluid. Therefore, the moving speed of the movable body can be finely adjusted.

According to a third aspect of the present invention, in the screen winding speed adjusting device, the second fluid connection passage includes a plurality of passages, and any one of the plurality of fluid connection passages is movable. The passage is blocked when the body moves in the hollow portion in the axial direction. Therefore, the moving speed of the movable body can be changed with the movement of the movable body in the axial direction.

According to a fourth aspect of the present invention, in the screen winding speed adjusting apparatus, the flow rate adjusting section is provided in each of the second fluid connection passages. Therefore,
The movable body can be finely adjusted with the movement of the movable body.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 9, a screen winding speed adjusting device 1 according to an embodiment of the present invention is incorporated in a case 77 of a screen winding device and has one end of a winding shaft 78 for winding a screen 85. It is used by being connected to.

FIG. 4 is an assembled perspective view of the screen winding speed adjusting device 1 according to one embodiment of the present invention. The screen winding speed adjusting device 1 includes a main body 3, a lid 11, a rotating shaft 9,
A piston 5, a washer 24 and a rotation stop pin 29 are provided. In this embodiment, the housing is constituted by the main body 3 and the lid 11, and the piston 5 constitutes a movable body.

The main body 3 has notches 22 and 23 and a hollow portion 6. Notch 22,2
Reference numeral 3 denotes a rotation preventing concave portion when fixing to the case in the screen winding device.

The piston 5 is inserted into the hollow portion 6. A rotation stop pin 29 is inserted into the hole 27 of the piston 5,
One end of the rotation stop pin 29 is inserted into the main body 3. Also,
The other end of the detent pin 29 is a hole 24b of the washer 24.
Is inserted into. The washer 24 has a convex portion 24a, and fits into a concave portion (not shown) provided in the main body 3.
As a result, the main body 3 and the piston 5 slide between each other (Slid).
ing pair). Here, the slip pair refers to a pair in which the elements forming the pair are in a relationship such that they cannot perform any other than linear movement. In this case, the piston 5 does not rotate in the main body 3 and moves in the direction of the arrow P. Only move freely.

The rotating shaft 9 includes a screw portion 19, a shaft main body 21, and a winding shaft insertion portion 18 into which a winding shaft of a screen (not shown) is inserted. The screw 19 is inserted into the inner screw 28 of the piston 5.

The take-up shaft insertion portion 18 is inserted into the hole 11a of the cover 11, and the shaft main body 21 is rotatably held by a bearing portion of the cover 11 as described later. Also, the lid 11 is
Screwed. Thus, the rotating shaft 9 and the lid 11 have a relationship of a turning pair. Here, the turning pair refers to a pair in which the elements forming the pair are in a relationship such that they cannot perform any other than rotational movement. In this case,
The rotation shaft 9 rotates in the arrow Q direction.

As described above, since the rotating shaft 9 and the lid 11 are in a turning pair relationship, and the main body 3 and the piston 5 are in a sliding pair relationship, the piston 5 and the rotating shaft 9 are in a screw pair ( Screw pair). Here, the screw pair refers to a pair in which the elements forming the pair perform a rotational motion and a linear motion simultaneously, in this case,
When the rotating shaft 9 rotates in the direction of arrow Q, the piston 5 does not rotate in the main body 3 but moves in the direction of arrow P.

FIG. 1 is a sectional view of a main portion of the screen winding speed adjusting device 1. The main body 3 includes passages 13, 14, 15, 16 which are second fluid communication passages. The fluid communication passage 15 is provided with a regulating valve 25 which is a flow rate regulating unit.

The adjustment valve forming section 34 will be described with reference to FIGS. 2 and 3 are views from arrows δ and γ. As shown in the figure, the adjustment valve forming portion 34 is provided so as to protrude from the main body 3.

In FIG. 1, the hollow portion 6 of the main body 3 is divided by a piston 5 into a front chamber 6a as a first fluid securing chamber and a rear chamber 6b as a second fluid securing chamber.

The piston 5 has a passage 17 which is a first fluid communication passage. The passage 17 is provided with a check valve 20 which is an operation valve.

The passages 13 to 17, the front chamber 6a, and the rear chamber 6b are filled with hydraulic oil as a fluid. In this example, a general mineral oil was used as the hydraulic oil.
This hydraulic oil adjusts the operation speed of the piston 5 and functions as a lubricant between the piston 5 and the main body 3 as described later .

The lid 11 is screwed with four screws (see FIG. 4). The shaft main body 21 of the winding shaft insertion portion 18 is
Is rotatably held by the bearing portion 36.

[Operation of Screen Winding Speed Adjusting Apparatus 1] Next, an operation of the screen winding speed adjusting apparatus 1 will be described with reference to FIG. The state of FIG. 1 shows a state where the screen is extended. From this state, the screen winding operation is performed as follows. As shown in FIG. 9, when the handle 87 is slightly pulled in the direction of arrow R, the lock is released (not shown), and the winding of the screen 85 is started.

When the winding shaft 78 of the screen rotates, the winding shaft insertion portion 18 connected to the winding shaft 78 in FIG.
Rotates in the direction of arrow M2, and the rotation of the screw portion 19 of the rotating shaft 9 is transmitted to the inner screw of the piston 5. Here, the rotation of the piston 5 is restricted by the detent pin 29. Therefore, the piston 5 moves in the arrow β direction.

The movement of the piston 5 causes the front chamber 6
The hydraulic oil (a) moves to the rear chamber 6b through the passages 16 to 13. At this time, the check valve 20 is closed by moving the piston 5 in the direction of the arrow β. As a result, the passage 17 is closed.

The screw portion 19 of the rotating shaft 9 comes out of the hollow portion 35 of the piston 5 and the volume of the hollow portion 35 increases. As a result, part of the hydraulic oil filled in the front chamber 6a moves from the passage 37 provided in the lid 12 to the hollow portion 35.

An adjusting valve 25 is provided in the passage 15, and the adjusting valve 25 can adjust the flow velocity of the hydraulic oil moving through the passages 16 to 13, thereby finely adjusting the winding speed. can do.

[0036] This makes it possible to absorb the impact at the time of winding the screen with a simple structure without exposure to the outside, and
A screen winding speed adjusting device capable of finely adjusting the winding speed can be provided.

The rotating shaft 9 corresponding to the screen winding operation
Rotates, the volume of the front chamber 6a decreases and the volume of the rear chamber 6b increases accordingly. The rotating shaft 9 rotates by the amount of winding of the screen, and the piston 5 moves in the direction of arrow β by a predetermined stroke, thereby completing winding.

The adjusting valve 25 will be described with reference to FIG. FIG. 5 is an enlarged view of the vicinity of the adjustment valve forming section 34 in FIG. FIG. 5A shows a state where the adjustment valve 25 is pushed in the direction of the arrow 46. In FIG. 5A, the surface 41 of the adjustment valve forming portion is in contact with the surface 42 of the adjustment valve 25. Therefore,
The flow of the hydraulic oil flowing through the passage 16 is stopped in a state indicated by an arrow 44. That is, FIG. 5A shows a state in which the hydraulic oil does not flow at all. The adjusting valve 25 has an O-ring 49, so that the operating oil does not leak.

From the state shown in FIG. 5A, the control valve 25 is rotated to return the control valve 25 in the direction of the arrow 47. This creates a gap between surface 41 and surface 42, as shown in FIG. 5B. As a result, the hydraulic oil flowing through the passage 16 flows into the passage 15 as indicated by an arrow 43.

The tip of the regulating valve 25 is cut into a V-shape. Accordingly, when viewed from the direction of arrow 50, a V-shaped gap 31 is formed between surface 41 and surface 42, as shown in FIG. 6A. This V-shaped gap 31 is
By moving the control valve in the direction of arrow 46 (see FIG. 5A), the size becomes smaller as shown in FIG. 6B, and by moving the adjustment valve 25 in the direction of arrow 47 (see FIG. 5B), the size becomes larger as shown in FIG. 6C. Become. Thus, the flow rate of the hydraulic oil can be adjusted.

Referring to FIG. 1, the operation of pulling out the screen will be described. From the state where the piston 5 has moved in the direction of the arrow β by a predetermined stroke, the rotating shaft 9 rotates in the direction of the arrow M1. In this case, the rear chamber 6b is connected to the front chamber 6a.
The check valve 20 provided in the passage 17 is opened by the pressure at which the hydraulic oil moves, and the hydraulic oil moves from the rear chamber 6b to the front chamber 6a through the passage 17. Therefore, even if the flow rate of the hydraulic oil is restricted by the adjustment valve 25, the rotation of the rotary shaft 9 can be rotated with a light load without limiting the rotation of the rotary shaft 9.

[Screen Winding Speed Adjusting Apparatus 51] FIGS. 7 and 8 are simplified diagrams of the structure of a screen winding speed adjusting apparatus 51 according to another embodiment. The screen winding speed adjusting device 51 includes a plurality of passages 66,
67. The passages 66 and 67 have a common passage 64. By providing the common passage in this way, space efficiency can be improved. It should be noted that both the passages 66 and 67 have a regulating valve 6 which is a flow rate regulating unit.
1, 62.

In this embodiment, the adjustment valve 61 is adjusted so that the flow velocity is higher than that of the adjustment valve 62.
Further, as shown in FIG.
The passages 66 and 67 are formed such that the passage 67 is blocked by moving in the direction.

From the state shown in FIG.
When moving in the direction, the hydraulic oil in the front chamber 6a passes through the passage 66,
It moves to the rear chamber 6b through 67. At that time, the regulating valve 6
Since the flow rate of the adjustment valve 61 is adjusted to be higher than that of the adjustment valve 2, most of the moving hydraulic oil moves through the passage 67.

When the movement of the piston 5 in the direction of the arrow α advances, the passage 67 is blocked by the piston 5 as shown in FIG. Since the passage 67 is adjusted to have a high flow velocity, the moving speed of the hydraulic oil decreases. in this way,
The winding speed can be changed stepwise by providing a plurality of passages and configuring the passages so that a part of the passage is blocked by the movement of the piston 5. That is, optimal adjustment can be performed according to the winding stage.

[Other Application Examples] In the present embodiment, a general mineral oil is used as the hydraulic oil, but the same may be used as long as it has a predetermined viscosity and lubrication action. Silicon or the like may be used.

In the screen winding speed adjusting device 51, a passage 64 is used as a common passage for the passages 66 and 67.
However, it is also possible to separately configure each passage without providing such a common passage.

In the screen winding speed adjusting device 51, the passages 66 and 67 are provided as a plurality of passages, but three or more passages may be formed. Thereby, more appropriate adjustment of the winding speed can be performed.

Also, without providing a flow rate adjusting valve, the combination of the diameter of the passage, the number of passages and the viscosity of the hydraulic oil can be used.
The flow rate may be adjusted.

In this embodiment, the rotation preventing pin 29 is used to prevent the piston 5 from rotating. However, another mechanism may be used as long as the main body 3 and the piston 3 are in a slip-and-even relationship. For example, the shape of the piston 5 may be partially convex so that the piston 5 fits into the hollow of the main body 3, or may be elliptical or polygonal.

In this embodiment, the working oil filled in the hollow portion 35 of the piston 5 moves from the passage 37 provided in the lid 12 to the rear chamber 6b. However, without being limited to this, for example,
A passage is provided in the screw portion 19, and the front portion 6a
May be moved.

In the above-described embodiment, the regulating valve, which is a flow rate regulating unit, is provided in the second fluid connection passage, but may be provided in the front chamber 6a or the rear chamber 6b.

In this embodiment, the hydraulic oil flows from the passage 16 to the passage 13 during the winding operation. Thereby, pressure can be prevented from being applied in the direction in which the adjustment valve 25 comes off. However, the direction of the passage 13 is not limited to this direction.
The hydraulic oil may flow in the direction of the passage 16 from the direction.

[0054]

According to the first aspect of the present invention, a rotating shaft connected to a winding shaft of the screen is provided.
A housing having a hollow portion formed along the axial direction of the rotating shaft, a housing in a rotating and even relationship with the rotating shaft, a sliding and even relationship with the housing, and the rotating shaft and a screw pair. And a movable body that divides the hollow portion into a first fluid securing chamber and a second fluid securing chamber.

Therefore, when the rotating shaft rotates with the rotation of the winding shaft of the screen, the movable body moves in the hollow formed along the axial direction of the rotating shaft.

Further, a first fluid connection passage and a second fluid connection passage connecting the first and second fluid securing chambers are provided in the first fluid connection passage. ,
An actuating valve for blocking movement of the fluid from the first fluid securing chamber to the second fluid securing chamber through the fluid connecting passage.

Therefore, the movement in the first direction is
The movement is limited to the movement of the first fluid connection passage. That is, the moving speed of the movable body is determined by the moving speed of the fluid passing through the first fluid connecting passage. In the movement in the second direction, the first fluid connection passage opens and the fluid moves through the passage.

Thus, the moving speed of the movable body in the first direction is low, and the moving speed of the movable body in the second direction is high.

That is, it is possible to provide a screen winding speed adjusting device which has no exposure to the outside and has a simple structure and can absorb the shock at the time of screen winding.

According to a second aspect of the present invention, the flow rate adjusting section changes the flow rate of the fluid. Therefore, the moving speed of the movable body can be finely adjusted. Accordingly, it is possible to provide a screen winding speed adjusting device which has no exposure to the outside, can absorb a shock at the time of winding the screen with a simple structure, and can finely adjust the winding speed.

According to a third aspect of the present invention, the second fluid connection passage is composed of a plurality of passages, and one of the plurality of fluid connection passages is provided with the movable passage. The passage is blocked when the body moves in the hollow portion in the axial direction. Therefore, the moving speed of the movable body can be changed with the movement of the movable body in the axial direction. Accordingly, there is provided a screen winding speed adjusting device which has no exposure to the outside, can absorb the shock at the time of winding the screen with a simple structure, and can change the winding speed according to the winding stage. be able to.

According to a fourth aspect of the present invention, in the screen winding speed adjusting device, the flow rate adjusting section is provided in each of the second fluid connection passages. This allows
Provided is a screen winding speed adjusting device capable of absorbing a shock at the time of winding a screen with a simple structure without being exposed to the outside and capable of finely adjusting a winding speed changed according to a winding stage. Can be.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a screen winding speed adjusting device 1 according to an embodiment of the present invention.

FIG. 2 is a view from arrow δ in FIG.

FIG. 3 is a view from arrow γ in FIG. 1;

FIG. 4 is an assembled perspective view of the screen winding speed adjusting device 1.

FIG. 5 is a detailed view of a regulating valve 25.

FIG. 6 is a view showing a state of a V-shaped gap 31 of the adjustment valve 25;

FIG. 7 is a simplified configuration diagram of a screen winding speed adjusting device 51 according to another embodiment.

FIG. 8 is a view showing a state in which a piston 5 has moved in FIG. 7;

FIG. 9 is a view showing the entire configuration of the screen winding device provided with the screen screen winding speed adjusting device 80 according to the present invention.

FIG. 10 is a view showing a conventional screen winding speed adjusting device 80.

[Explanation of symbols]

 3 Body 5 Piston 6a Front chamber 6b Rear chamber 9 Rotating shaft 11 Cover 13 Passage 14 ... passage 15 ... passage 16 ... passage 17 ... passage 20 ... check valve 25 ... adjustment valve

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 21/56-21/58 B60J 5 / 08,5 / 14 B65H 18/00-18/28 B65H 23/18-26 / 08 B65H 75/34-75/50 G05D 13/00-13/66 A47H 1/00-33/02 E06B 9/08-9/17

Claims (4)

(57) [Scope of request for utility model registration] A housing having a rotating shaft connected to a winding shaft of a screen, a hollow portion formed along an axial direction of the rotating shaft, and a rotating pair with the rotating shaft; A movable body having a sliding pair relationship with the housing and a screw pair relationship with the rotating shaft, wherein the movable portion divides the hollow portion into a first fluid securing chamber and a second fluid securing chamber. A first fluid connection passage and a second fluid connection passage for connecting the first and second fluid securing chambers, wherein the fluid is provided in the first fluid connection passage; An actuating valve for shutting off movement of the fluid from the first fluid securing chamber to the second fluid securing chamber through a body connection passage. 2. The screen winding speed adjusting device according to claim 1, wherein said screen is provided in said second fluid connection passage or in said first fluid securing chamber or said second fluid securing chamber. A screen winding speed adjusting device, comprising: a flow speed adjusting unit that changes a flow speed of a body. 3. The screen winding speed adjusting device according to claim 1, wherein the second fluid connection passage comprises a plurality of passages, and any one of the plurality of fluid connection passages is provided. A screen winding speed adjusting device, wherein the movable body moves in the axial direction in the hollow portion so as to block the passage. 4. The screen winding speed adjusting device according to claim 3, further comprising the flow rate adjusting unit in each of the second fluid connection passages.