JPS6368827A - Blade supporting device for divided blade shutter - Google Patents

Abstract

PURPOSE:To use respective blades in a flat state and to increase the speed of a shutter by providing joint parts between arms and blades with step parts which differ in height gradually toward the base parts of the arms. CONSTITUTION:This support device is equipped with a blade group consisting of a slit forming blades 6 and cover blades 7-9 which cover a light beam passing window 2 and at least two arms 3 and 4 which form a parallel link mechanism to support the slit forming blade 6 pivotally at their tip parts and operate while having base parts supported at one side of the light passing window 2 so as to support pivotally and operate the cover blades 7-9 successively to the base parts. The blades 6-9 are supported pivotally on the tip part of the arms 3 and 4 and the number of blades increases toward the base parts, so projections which differ in height are provided to the blades for thickness corresponding to the plate thickness of the respective blades. Consequently, all of the blades 6-9 are coupled with the arms 3 and 4 in parallel and held in contact in the flat state.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a support device for a divided blade shutter consisting of a group of blades divided into a plurality of blades. The shutter blade is pivoted to the arm of
This invention relates to a device for bringing those shutter blades into close contact with each other.

[Prior art]

A group of blades divided into a plurality of blades is pivotally supported in sequence from the tip to two arms pivotally supported on one side of the board, and at least one of the blades is bent at one or more places so that they can be connected to each other. A close-contact focal-brain shutter has already been proposed in Japanese Patent Application Laid-Open No. 55-9507. Such a shutter is one in which the blades are directly bent to forcibly bend the syllables. When applied to recent ultra-high speed shutters, there is a speed limit.

In other words, does the degree of adhesion of the bent syllable blades change as they move toward the tip? 1-Increased light-shielding properties are improved, but since force is applied in the direction of arrival, braking force is applied at the beginning of driving, requiring more starting torque than necessary, which has the disadvantage of operating at high speed. Become.

Furthermore, the bending process of the blades is not stable, and there are differences in the surface condition of each blade, resulting in differences in the coefficient of friction, and each shutter on the mass-produced side has inherent instability.

〔the purpose〕

The present invention was developed in view of this difficult problem, and its purpose is to provide a parallel link machine 11111!
It is an object of the present invention to provide a device in which each blade is pivotally supported on an arm of the present invention, and the blades are all pivoted at a flat 1\, so that the blades are brought into close contact with each other.

[Means to achieve the purpose]

That is, in order to achieve the purpose of pasting, the present invention comprises a blade group consisting of a plurality of divided slit-forming blades and cover blades that cover a light beam passing window, and a parallel link mechanism, and the slit-forming blades At least two armlets are provided which are pivoted at the tip and are operated by being sequentially pivoted toward the whole base part of the front cover blade. This is a blade support device for a split blade shutter in which each blade is pivoted so as to move closer to the arm in sequence as it approaches the front 6-pin main body.

[Embodiment] The following is a detailed explanation of an embodiment of the present invention, which is fully illustrated in detail.

Fig. 1 shows an embodiment of the present invention, in which a substrate has a central code 1b'jt and a W passing window 2, and two l'l's are installed vertically at intervals on the negative side thereof. ! 1lI13a.

4 a Vr- is the 1st. The base ends of the second main arms 5, 4 are pivotally supported so as to be movable. These first. The second main arm 3.4 (g) holds the slit forming blade 6 so as to be moved horizontally downwardly along the light beam passing window 2, and is used to hold the substrate 1.
The shaft 6a on the slit-forming blade 6 is planted at the same interval as the shafts 3a and 4a above.

6b, a parallel link machine 1111 is formed by the substrate 1, these main arms 5, 4, and the slit blade A, and furthermore, by these main arms 5, 4, a first link machine following the slit blade 6 is formed. One side of the trailing wing barb 7 is planted therein with a nine-sided shaft 7a.

It is supported via 7bi.

On the other hand, reference numeral 5 in the figure is an auxiliary arm that is pivotally supported by a shaft 5a on the base plate 1 provided above the first main arm 6 and swings parallel to these, and is located at the farthest point F with this auxiliary arm 5. The second main arm 4 connects the second king arm shaft 4b on the substrate 1.
and the fifth arm shaft 5a, with a large distance between them. Shaft 8a on third trailing blade 8,9
.

8b, 9a, 9b all support Eli, these 2nd.
The mechanism for making the sixth trailing cover blades 8 and 9 perform the entire movement is 1 llv. In addition, the code 4C in the figure is
It shows the operating hole on the second king arm 4 that engages with the ffi moving hinge (not shown).゛In the embodiment described above, the second main arm 4 is connected to a driving pin (not shown) through the worm operating hole 4c in a driving manner 441]
4a), (When it rotates as a fulcrum, the first king arm 5 that constitutes the parallel link mechanism and the auxiliary arm 5 located above it also swing in parallel, and the held slit blade 6 and this , are moved along the base line passing window 2 while being held horizontally.

After the above-mentioned blade group starts to move, a known method (not shown) is used. After the exposure time has elapsed, a separate blade group (omitted to simplify the figure, but a similar III configuration) (which is pivotally supported on the substrate) similarly sequentially covers the light beam passing window 2 to complete the exposure.

The second factor is a side view of the main parts of the arm and the blade support.
Each blade pivotally supported by the arm 4 and the side shape of the arm 4 are shown. In the figure, blades 6, 7, 8', and 9 are pivotally supported in order from the tip of the arm 4, but since the number of blades increases as it approaches the main body, the thickness of each blade is equivalent to the plate thickness. Next, each blade has protrusions of different heights.

That is, the blade 6 is connected to the protrusion 6 :: Murasaki'T-mu 4 by the bottle 6b, but the blades 7' and '8.9i are the protrusions 70, 8C2゜9CK-, each of which increases in sieveness in order.
↓Since it is connected to the rear arm 4, the blades 6.7. B,
9 are both connected in parallel with the arm 4 and maintain a flat dimension and a dense layer. The blades pivotally supported on the arm 6 and the auxiliary arm 5 are similarly connected to the arms by protrusions whose weights increase in sequence.

In the above embodiment, the interference between the blades is reduced.↓The entire sea urchin auxiliary arm 5 is used, so even if some warpage occurs in the valley blades, interference is unlikely to occur, and highly efficient operation is guaranteed. However, the effect of the present invention can be obtained even if all the blades are supported by two arms V:i
Easy to understand.

Fig. 5 shows an implementation in which the protrusion (!) on the arm 4 increases the It primary run σ as it approaches the throwing core side.

In Figure 4, -rm 4 is flat 1\ and each blade is the same, but is it in order? : is an example provided in the subazer connection part of different simplicity.

Figure 5 a, l Spacer in the embodiment of Figure 4? It has been deleted.

Is there necessarily a difference in any of the above embodiments? There is no need to worry about changing your doctor, and even if you make the difference between adjacent patients almost the same, the same effect can be obtained within an inexcusable range.

〔effect〕

As is clear from the explanation on the circle, as the joint between the arm and each blade approaches the main body side of all the arms, the steps are set at different weights, so the valley blade is used in a flat trench. This allows the valley blades to operate without interfering with the P-plane of the blade alone, and without creating friction, which makes it possible to increase the speed of this type of shutter, and the shutter Since there are no individual differences, shack production with high mass productivity is possible, which is extremely effective.

[Brief explanation of drawings]

Figure 1a: A thousand-sided view showing an embodiment of the present defense; Figure 2: 41
The glS side view of FIG. 1, FIG. 1, FIG. 4, and FIG. 1... Board 2... Round wire passing window 6.4... Arm 5... Auxiliary arm 6.7, 8.9... Vane No. 1 Figure 2 Figure 3 Figure 4! ;mouth

Claims (1)

[Claims] A blade group consisting of a plurality of divided slit-forming blades and cover blades that cover the light beam passing window constitutes a parallel link mechanism, and the slit-forming blade is pivoted at the foremost part, and the cover blade is the main body. at least two arms that are supported and operated by the main part on one side of the light beam passing window in order to be operated by being sequentially pivoted toward the main part; A blade support device for a split blade shutter, which is pivoted so as to be successively separated from the arm.