JPH0234034Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a shutter mainly used for phototypesetting machines, etc. In other words, a fan-shaped opening/closing plate is provided to cover the shutter plate formed on the shutter base and can be rotated freely.
A shutter in which this opening/closing plate is interlocked with an associated operating shaft to rotate and stop via a motor and a slip transmission, for example,
This invention relates to an improvement of the slip transmission device in a shutter such as that disclosed in Publication No. 53-36098.

That is, the structure of the slip transmission device in the shutter described in the above publication is such that the gear 12 on the operating shaft 5 that meshes with the pinion 11 of the motor shaft 10 is loosely fitted so that it can freely rotate with respect to the operating shaft 5. is opposed to the flange plate 14 fixed on the operating shaft 5 via the friction plate 13, and this gear 1
A dish-shaped elastic plate 15 is placed on the opposite side of the shaft 2, and a locking nut 16 that also serves as an adjustment is screwed onto the shaft end.By adjusting this nut, the elastic force of the elastic plate 15 is adjusted. If the rotational resistance of the motor 5 is large, even if the small gear 11 of the motor rotates, the gear 12 will only overcome the friction of the friction plate 13 etc. due to the pressure of the elastic plate 15 and will slip on the operating shaft 5 and idle. If the rotational resistance is small, the gear 12 has a friction plate 13 and a collar plate 14.
Since it is designed to rotate integrally with the actuating shaft 5 due to the friction of Points such as the need for skill are pointed out. The purpose of the present application is to solve these conventional problems, and its configuration is such that a boss 11 equipped with a magnet 13 with a friction plate 14 bonded to the outer surface is fixed to a shaft 10 of a motor 9 for operating the opening/closing plate. At the same time, a stopper 15 and a clutch pawl 16 are formed on the outer periphery of a clutch plate 17 provided at the end of the opening/closing plate operating shaft 5 so that their protruding directions are parallel to the rotating shaft and opposite to each other. An intermediate clutch plate 19 made of a magnetic material having a friction plate 18 similarly fixed to the surface facing the friction plate 14 by engaging the recess 20 with the friction plate 14 is connected to the magnet 13 and the intermediate clutch plate 19 made of a magnetic material. By rotating the motor 9 in conjunction with the suction relationship with the plate 19,
The rotation is transmitted to the actuating shaft 5, and the action is performed by the suction force of the magnet instead of the conventional pressing force due to elasticity, so it can withstand frequent use and prevents warping due to aging. This improves reliability, reduces the number of component parts, simplifies the overall structure, and reduces assembly precision, resulting in an advantage in terms of manufacturing costs.

To explain the drawings below, 1 is the shutter base. 2 is an aperture formed at one end of the shutter base 1.
Reference numeral 3 denotes a vertical shaft installed near the photographic aperture 2, and a fan-shaped opening/closing plate 4 is attached to the upper end of the vertical shaft. Then, the aperture 2 is opened during that time. The opening/closing plate 4 is provided with a gear 7 that constantly meshes with a gear 6 provided at the end of the opening/closing plate operating shaft 5, and is configured so that when the operating shaft 5 rotates once, the opening/closing plate 4 also rotates once. The operating shaft 5 is horizontally mounted on bearings 8, 8 provided on the shutter base 1, and is driven by a motor 9, and a slip transmission device S, which will be described later, is connected to the motor.
It is intended to provide

The configuration of the slip transmission S described above is as follows. That is, as shown in the disassembled view of FIG. 4, a dish-shaped boss 11 for attaching a magnet is fixed to the shaft 10 of the motor 9 with a mounting screw 12, and a magnet 13 is fixed inside this boss 11 using an adhesive or the like. Furthermore, a friction plate 14 made of a thin synthetic resin or the like is firmly attached to the outer surface of the magnet 13 using an adhesive. On the other hand, a clutch plate 17 having a stopper 15 facing inward and a clutch pawl 16 facing the opposite direction is fixed to the end of the operating shaft 5 opposite to the end of the gear 6. , a magnetic body (iron piece) with a friction plate 18 firmly attached to the outer surface facing the friction plate 14 is provided.
The above-mentioned clutch pawl 16 is engaged with the recess 20 formed around the intermediate clutch plate 19, and the above-mentioned friction plates 14 and 18 are connected to the intermediate clutch plate 19.
The rotation of the motor shaft 10 is transmitted to the operating shaft 5 by the friction caused by the pressure contact between the friction plates 14 and 18, and when the rotational resistance on the operating shaft 5 side is large. Even if the motor shaft 10 rotates by overcoming the frictional force between the friction plates 14 and 18 caused by the attraction force of the magnet 13, the operating shaft 5 is configured to remain in a stopped state.

In order to rotate and stop the operating shaft 5, a stopper lever 22 is provided on the vertical wall of the shutter base 1 so as to be able to swing freely with a support shaft 21. The upper end of the suction core 24 of the electromagnet 23 fixed to the panel 1 is connected, and the protrusion 27 provided at the end of the normal contact lever 22 is connected to the upper end of the attraction core 24 of the electromagnet 23 fixed to the panel 1. It is kept in pressure contact with the restraining piece 28 attached to the vertical wall surface of the base plate 1. At the tip of the other arm of the hit lever 22, as shown in FIGS. first and second locking pieces 29,
form 30.

In addition, in order to keep the photographic aperture 2 in an open state for a while due to the necessity of adjusting or inspecting the light source, an L-shaped lever 31 for opening the photographic aperture is moved around the support shaft 32 as shown in FIG. The lower arm of the L-shaped lever 31 is connected to a suction core 34 of an electromagnet 33 for opening the shutter, and when the electromagnet 33 is energized and the suction core portion is pulled, the L-shaped lever 31 opens. 31 is configured so that it rotates so that a claw piece 35 provided at the end of its side arm protrudes into the rotation path of the stopper 15, and return springs 36 and 37 are attached to the lever 31 and the iron core 34. be.

Next, to describe its operation, if no current passes through the electromagnet 23, the contact lever 22 is biased counterclockwise by the elasticity of the return springs 25 and 26 as shown in FIG. The stopper 15 is in contact with the first locking piece 29. Therefore, in this state, motor 9 starts and motor shaft 1
0, as well as the boss 11 that has an integral relationship with this,
Even if the magnet 13 and friction plate 14 rotate,
The other friction plate 18 facing this is connected to the clutch 1.
The stopper 15 of No. 7 is blocked by the first locking piece 29 and cannot rotate. That is, the friction plate 14 on the transmission side and the friction plate 18 on the driven side are in a slip state, and the operating shaft 5 is kept in a stopped state. When the operator operates the phototypesetting handle (not shown in the figure) in this state, the switch for the circuit of the electromagnet 23 is turned on as the handle is pressed down, and current flows through the electromagnet 23, causing the iron core 24 to become a spring. 25,2
Since it is attracted against the elasticity of 6, the hit lever 22
From the state shown in FIG. 3, rotate slightly clockwise to remove the first locking piece 29 from the stopper 15. Then, the actuating shaft 5 becomes free, and the driven friction plate 18 becomes integral with the mating transmission friction plate 14 by the frictional force, moving the actuating shaft 5 clockwise as shown by the arrow in FIG. Rotate. When the operating shaft 5 rotates approximately once, the opening/closing plate 4 also rotates approximately once due to the meshing relationship between the gears 6 and 7, and the stopper 15 moves to the second position.
Since it hits the outer surface of the locking piece 30, the copying aperture 2 is opened and then closed again, during which time one character is phototypeset. In this way, when the circuit of the electromagnet 23 is opened and the electromagnet 23 loses its attractive force, the hit lever 22 is rotated counterclockwise by the elasticity of the return springs 24 and 26 and restored to its normal position, so that the second locking occurs. The stopper 15 that has come off from the piece 30 rotates a little and returns to the third position.
As shown in the figure, it comes into contact with the first locking piece 29 and returns to the normal position. When it is necessary to keep the photographic aperture 2 open, the circuit of the electromagnet 33 for opening the photographic aperture is closed, and the L-shaped lever is rotated by its suction force.
After inserting the claw piece 35 into the rotation path of the stopper 15, if the circuit of the electromagnet 23 is closed as described above,
The operating shaft 5 rotates approximately half a turn, and the stopper 15 engages the claw piece 3.
5, the photo aperture 2 can be kept fully open.

This invention is based on a shutter in which a fan-shaped opening/closing plate 4 is rotatably provided to cover a photographic aperture 2 formed on a shutter base 1 as described above. Friction plate 1 on the outer surface
4 is fixed, and a clutch plate 17 provided at the end of the opening/closing plate operating shaft 5 is provided with a stopper 15 and a clutch pawl 16 on the outer periphery, and a recess is formed in the clutch pawl 16. An intermediate clutch plate 19 made of a magnetic material and having a friction plate 18 similarly fixed to the surface facing the friction plate 14 is provided, and both friction plates 14 and 1 are engaged with each other.
8 are integrally rotated by the suction relationship between the magnet 13 and the intermediate clutch plate 19,
Although the rotation of the motor 9 is transmitted to the operating shaft 5, if the lever 22 hits the stopper 15, the operating shaft 5 side will stop due to the resistance.
Both friction plates 1 are installed so that only the motor shaft 10 side rotates.
4 and 18, unlike slip transmission devices in conventional shutters of this kind, which use the elasticity of springs to press the friction plates against each other to interlock them, the friction plates are slid between 4 and 18. As a result of using force to press the friction plates against each other, the friction plates can withstand frequent use, prevent warping due to aging, keep the pressing force constant at all times, and improve reliability. less,
In addition to simplifying the overall structure, assembly is also facilitated because assembly precision is not required, and manufacturing costs are also advantageous.

[Brief explanation of drawings]

The drawings show a shutter device according to the invention, and FIG. 1 is a plan view thereof. FIG. 2 is a cutaway front view of the same as above. FIG. 3 is a cross-sectional side view of FIG. 1. Fourth
The figure is an exploded perspective view of the slip transmission. 1...Shutter base, 2...Photograph, 4...Opening/closing plate, 5...Operating shaft, 6, 7...Gear, 9...Motor, 10...Motor shaft, 11...Boss, 13
... Magnet, 14 ... Friction plate, 15 ... Stopper, 16 ... Clutch pawl, 17 ... Clutch plate, 18 ... Friction plate, 19 ... Intermediate clutch plate,
22...stopper lever, 23...electromagnet.

Claims (1)

[Scope of utility model registration request] In a shutter in which a fan-shaped opening/closing plate 4 is rotatably provided to cover a photographic aperture 2 formed on a shutter base 1, a motor 9 for operating the opening/closing plate provided on the base 1 is provided.
A boss 11 equipped with a magnet 13 having a friction plate 14 glued to the outer surface thereof is fixed to the shaft 10, and a clutch plate 17 provided at the end of the opening/closing plate operating shaft 5 has a stopper 15 and a clutch pawl 16 on its outer periphery. The clutch claws 16 are formed so that their protruding directions are parallel to and opposite to each other, and the recesses 20 are engaged with the clutch pawls 16 so that a friction plate 1 is formed on the surface facing the friction plate 14.
Intermediate clutch plate 19 made of magnetic material to which 8 is fixed
The rotation of the motor 9 is transmitted to the operating shaft 5 by rotating both the friction plates 14 and 18 integrally through the attraction relationship between the magnet 13 and the magnetically intermediate clutch plate 19. When the stopper lever 22 comes into contact with the stopper 15, the operating shaft 5 side stops due to the resistance, and the friction plate 14 slips against the mating friction plate 18, so that only the motor shaft 10 side rotates idly. Shutter device.