JPH06301117A - Damper and shutter device - Google Patents

Abstract

PURPOSE:To provide a damper and a shutter device capable of smoothly starting to move a moving member such as a reciprocating shutter and capable of smoothly and precisely stopping it without generating an impact sound. CONSTITUTION:An arm 101 is fixed to a shutter 100 rotated by a solenoid 92. A magnetized plate 102 rotatable relatively to the arm 101 is fitted immediately below it. A magnet 120 is fitted to face the magnetized plate 102. When the shutter 100 and the arm 101 are rotated into contact with vibration control rubbers 110, 112, the arm 101 is moved together with the magnetized plate 102 attracted by the magnetic force, the moving force is consumed and absorbed by the sliding friction resistance caused by the magnetic force between the magnetized plate 102 (sliding plate 118) and a substrate 94, they are smoothly decelerated and stopped, and no impact sound is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper for stopping a moving member, which is moved by a driving source, at a predetermined position set by a stopper. The present invention relates to a shutter device that opens and closes a printing exposure opening of a printer that prints on photographic paper.

[0002]

2. Description of the Related Art A damper for absorbing the moving energy of a moving member and stopping it smoothly has been used in various fields, but the simplest structure is that of the moving member and this member. It is a shock absorbing rubber provided on any of the stoppers for preventing movement.

A damper made of such a cushioning rubber is
For example, it is used in a shutter device for opening and closing a printing exposure opening of a printer for printing an image of a negative film on printing paper.

This type of shutter device has a shutter capable of opening and closing the printing exposure opening. This shutter is arranged to open and close the opening for printing exposure,
The solenoid is connected. Further, a pair of stoppers are arranged at the movement limit of the shutter, and when the shutter that is opened and closed by the solenoid comes into contact with the stopper, its movement is blocked and stopped. Further, a shock absorbing rubber as a damper is attached to the stopper, and when the shutter comes into contact with the stopper, the shock absorbing rubber is absorbed by elastically deforming the shock absorbing rubber to absorb the moving force of the shutter. It is like this.

[0005]

However, a structure in which a cushioning rubber is arranged between the shutter and the stopper for restricting the movement as described above to absorb the shock, in other words,
With a damper mechanism consisting of simple cushioning rubber, the cushioning rubber receives all the moving force of the shutter and absorbs energy only by its elastic force, so the damping effect is extremely small, and therefore the shutter acts as a stopper (buffering rubber). Even after the contact, the shutter vibrates finely and it is difficult to stop smoothly, and there is a drawback that a large impact sound is generated when the shutter contacts.

In this case, if a damper having a complicated structure composed of an oil cylinder, a buffer spring or the like is used, or if a stepping motor or the like is used instead of the solenoid, the device becomes large and the cost becomes high. Don't

In consideration of the above facts, the present invention has a large damping effect and can smoothly start moving a moving member such as a shutter that reciprocates to open and close an opening for printing exposure without generating an impact sound. An object of the present invention is to provide a damper and a shutter device that can be stopped smoothly and with high accuracy and that can be realized by a simple structure.

[0008]

According to another aspect of the present invention, there is provided a damper for stopping a moving member, which is moved by a drive source, at a predetermined position set by a stopper, within a moving locus of the moving member. Is arranged so as to be engageable with the moving member and relatively movable, and in the state of being engaged with the moving member, it is pressed by the moving member and moves along with it, and abuts against the stopper to prevent the movement. Provided between the driven member, the moving member and the driven member, and between the driven member and the stopper,
A cushioning material that absorbs the impact between the moving member and the driven member and the impact between the driven member and the stopper, and is arranged so as to face the movement trajectory of the driven member, and the driven member is attracted by a magnetic force to attract the driven member. Magnetic force braking means for absorbing the moving force of the driven member.

A damper according to a second aspect of the present invention is characterized in that, in the damper according to the first aspect, an ultrahigh molecular weight low friction coefficient material is provided on the surface of the cushioning material.

The shutter device of the invention according to claim 3 is
The printer has a shutter capable of opening and closing a printing exposure opening of a printer for printing an image of a negative film on printing paper, and the shutter is driven by a driving source to reciprocate within a predetermined range set by a pair of stoppers. In the shutter device that opens and closes the printing exposure opening, the shutter device is provided so as to be relatively movable with respect to the shutter, and has a pair of engaging portions that can engage with the reciprocating shutter, and any one of the engaging portions. Is pressed by the shutter when the shutter is engaged with the shutter and moves following the shutter, and its movement is blocked by contact with the one stopper, and when the movement is blocked, the other one is engaged. A driven member whose portion is separated from the other stopper, between the shutter and the engaging portion, and between the engaging portion and the stopper, Serial impact with the shutter and the driven member,
And a cushioning material that absorbs the impact of the driven member and the stopper, and a magnetic brake that is disposed so as to face the movement trajectory of the driven member and that attracts the driven member by magnetic force to absorb the moving force of the driven member. And means.

The shutter device of the invention according to claim 4 is
In the shutter device according to the third aspect of the present invention, the magnetic force braking means is replaced by friction braking means that presses the driven member and absorbs the moving force of the driven member by sliding friction resistance.

The shutter device of the invention according to claim 5 is
The shutter device according to claim 3 or 4 is characterized in that an ultra-high molecular weight material having a low friction coefficient is provided on the surface of the cushioning material.

[0013]

The damper according to the first aspect operates when the moving member moved by the drive source stops.

That is, when the moving member reaches a predetermined position, it abuts against the driven member and presses it, so that the driven member is moved together with the moving member. When the driven member, which moves along with the moving member, reaches the stopper, the movement is blocked and the movements of the moving member and the driven member are both stopped.

Here, the driven member is attracted by the magnetic force by the magnetic force braking means, so that the moving force of the driven member (moving member) is consumed and absorbed. Therefore,
After the moving member comes into contact with the driven member, the moving member and the driven member are quickly decelerated while being smoothly decelerated, and no impact noise is generated.

Further, between the moving member and the driven member, and
Since the cushioning member is provided between the driven member and the stopper, the shocks when the moving member contacts the driven member and when the driven member contacts the stopper are also absorbed, which is more effective. is there.

When the moving member and the driven member stop and then start moving again in the opposite direction, the moving member can move relative to the driven member, so that the moving member is quickly separated from the driven member. Only moved. In this case, since the magnetic force of the magnetic force braking means does not reach the moving member, the moving member is smoothly moved and is not adversely affected by the magnetic force braking means.

That is, in the damper having the above-described structure, until the moving member comes into contact with the driven member (in other words, until the moving member starts moving and then comes into contact with the driven member for stopping). After moving smoothly without being affected by others, and after the moving member comes into contact with the driven member for stopping, it is quickly stopped while being decelerated by the magnetic force braking means.

As described above, in the damper having the above structure, the damping effect is great, the moving member can be smoothly and accurately stopped without generating an impact sound, and this can be realized by a simple structure.

In the damper according to the second aspect of the present invention, since the ultra-high molecular weight low friction coefficient material is superposed on the surface of the cushioning material, the driven member comes into contact with the moving member or the stopper to elastically deform the cushioning material. When absorbing the shock, the friction of the cushioning material surface is reduced, and thus the durability of the cushioning material is improved.

In the shutter device according to the third aspect, when the shutter reaches a predetermined position (for example, a position that closes the printing exposure opening), it engages with one engaging portion of the driven member and presses it. The driven member is moved together with the shutter. When the driven member that moves along with the shutter reaches one of the stoppers, the movement is blocked and the movement of the shutter and the driven member is stopped together.

Here, the driven member is attracted by the magnetic force by the magnetic force braking means, so that the moving force of the driven member (shutter) is consumed and absorbed by the magnetic force.
Therefore, after the shutter is engaged with the driven member and moved together, the shutter and the driven member are smoothly decelerated and quickly stopped without fine vibration and no impact noise is generated.

Further, since the cushioning material is provided between the shutter and the engaging portion of the driven member and between the engaging portion of the driven member and the stopper, when the shutter engages with the driven member. , And the impact when the driven member comes into contact with the stopper is also absorbed by this, which is even more effective.

Further, when the shutter and the driven member are stopped by the one stopper, the other engaging portion of the driven member is separated from the other stopper,
It will be in a standby state for the next movement stop of the shutter.
That is, in other words, it is not necessary to reset the stop position again.

On the other hand, when the shutter and the driven member stop and then start moving again in the opposite direction (that is, in the direction in which, for example, the opening for printing exposure is opened), the shutter can move relative to the driven member. The shutter is quickly separated from the driven member and only the shutter is moved.
In this case, since the braking force by the magnetic braking means does not reach the shutter (because it acts only on the driven member), the shutter is moved smoothly and is not adversely affected by the magnetic braking means.

After the shutter is engaged with the other engaging portion of the driven member, the shutter is quickly decelerated while being smoothly decelerated as described above. As a result, for example, the opening for printing exposure is opened.

That is, in the shutter device having the above-described structure, until the shutter is engaged with the driven member (in other words, the shutter starts moving while being separated from one engaging portion of the driven member and is stopped for stopping). Until it engages with the other engaging part of the follower member), it moves smoothly without being affected by others, and the shutter abuts the follower member (engaging part) to stop. After that, the magnetic force braking means decelerates the vehicle and stops it quickly. Further, when the shutter is stopped, it is in a standby state for the next shutter stop, and it is not necessary to reset it again.

As described above, in the shutter device having the above-described structure, the shutter that reciprocates to open and close the printing exposure opening can be smoothly started and can be smoothly and accurately stopped without generating an impact sound. It can be realized by a simple structure.

In the shutter device according to the fourth aspect, the driven member is brought into pressure contact with the friction brake means, so that the moving force of the driven member (shutter) is consumed and absorbed by the sliding friction resistance. Therefore, after the shutter is engaged with the driven member, the shutter and the driven member are quickly decelerated while being smoothly decelerated, and the impact sound is not generated. Further, since it is a moving force absorbing mechanism simply by friction, the structure is simple and more effective.

In the shutter device according to the fifth aspect of the present invention, since the ultra-high molecular weight low friction coefficient material is superposed on the surface of the cushioning material, the driven member comes into contact with the moving member or the stopper and the cushioning material is elastically deformed. When absorbing the shock, the friction on the surface of the cushioning material is reduced, and thus the durability of the cushioning material is improved.

[0031]

FIG. 6 shows a schematic structure of a printer 10 to which a shutter device 50 according to an embodiment of the present invention is applied.

The outside of the printer 10 is covered with a casing 12, and a work table 14 protruding from the casing 12 is provided on the left side in FIG.

A negative carrier 18 on which a negative film 16 is set is placed on the upper surface of the work table 14. A light source unit 36 is installed below the work table 14. The light source unit 36 includes the light source 38 and the filter unit 4.
0 and a diffusion tube 42. The filter unit 40 is C,
It is composed of three filters of M and Y, and each filter can appear and disappear on the optical axis of the light ray 38. The light beam emitted from the light source 38 passes through the filter unit 40 and the diffusion tube 42 and is set on the negative carrier 18 so that the negative film 16 is set.
It is a structure leading to.

On the other hand, an optical system 46 is arranged on the arm 44 located above the work table 14. The optical system 46 includes a lens 48 and a shutter device 5 described later in detail.
0 and a reflection mirror 51, and the lens 48 and the shutter device 50 are arranged on the optical axis of the light beam emitted from the light source 38. The light rays that have passed through the negative film 16 pass through the lens 48 and the shutter device 50 (the opening thereof), and are reflected by the reflection mirror 51 (the optical axis is approximately 90).
The image of the negative film 16 can be formed on the photographic printing paper 54 that is deflected and set in the exposure chamber 52.

The optical system 46 is also provided with a density measuring device 56 such as a CCD for measuring the density of the negative film 16. The density measuring device 56 is connected to a controller (not shown), and an exposure correction value at the time of exposure is set based on the data measured by the density measuring device 56 and the data key-input by the operator.

On the other hand, a magazine mounting portion 60 is provided at the upper right corner of the exposure chamber 52. A paper magazine 64 for accommodating the long photographic printing paper 54 wound in a roll on a reel 62 is mounted on the magazine mounting portion 60. The paper magazine 64
A plurality of types of photographic printing paper 54 having different width dimensions are prepared, and are selectively used as desired. Further, a magazine sensor (not shown) is arranged in the magazine mounting section 60, and the type of the set paper magazine 64 (in other words, the width dimension of the printing paper 54) can be detected.

A conveyance roller 66 is arranged near the magazine mounting portion 60, and nips the photographic printing paper 54 and conveys it in the horizontal state to the exposure chamber 52. The photographic printing paper 54 is wound around a roller 67 in front of the arm 44, turned 90 degrees, and hung down. A stock section 69 is provided between the transport roller 66 and the roller 67 to guide and stock the printing paper in a substantially U shape.

An exposure stage 94 is provided downstream of the roller 67 in the guide direction of the printing paper 54. The exposure stage 94 is provided with a variable mask 95 which is connected to a control device (not shown) and opened / closed. Therefore, the control device changes the length dimension and the width dimension of the mask range of the variable mask 95 according to the print size and the type of print (for example, the presence or absence of a white frame).

A roller 6 is provided below the exposure position in the exposure chamber 52.
8A is arranged, and the photographic printing paper 54 on which the image of the negative film 16 has been printed is conveyed in the exposure chamber 52 with its direction changed by approximately 90 degrees. A cutter 71 is arranged downstream of the roller 68A. This cutter 71
It has a role of cutting the rear end of the printing paper 54 after the printing process, and therefore the printing paper 5 that remains in the exposure chamber 52.
4 can be rewound into the paper magazine 64 again.

A roller 68B is arranged at a position horizontally opposed to the roller 68A, and a roller 68C is arranged above the roller 68B. A reservoir portion 73 is provided between the roller 68A and the roller 68B. It is provided. In the reservoir section 73, the photographic printing paper 54 is stocked to absorb the difference in processing time between the exposure stage 94 for printing and the subsequent processing of development, bleach-fixing, and washing with water, so that the processing time between the adjacent processing sections is absorbed. It can be transported to the processor unit.

Here, in FIG. 1, the shutter device 5 described above is used.
0 is a partially cutaway and exploded perspective view, and FIGS. 2 and 3 are plan views of the shutter device 50, and FIG. 4 is a sectional view taken along line 4-4 of FIG. Has been done.

In the shutter device 50, a solenoid 92 as a drive source is attached to the back side of the substrate 94. The rotary shaft 93 of the solenoid 92 penetrates through the substrate 94 and projects upward, and a bearing 98 is fixed via a spring pin 96. This bearing 98
The shutter 100 is integrally fixed to the. Therefore, when the solenoid 92 operates, the shutter 1
00 can be rotated to move toward and away from the printing exposure opening 95 formed in the substrate 94. This shutter 10
0 is formed slightly larger than that corresponding to the opening 95, and can block the opening 95 when facing the opening 95.

An arm 101 is integrally fixed to the bearing 98 similarly to the shutter 100. The arm 101 is fixed in a direction opposite to the shutter 100 (a direction away from the opening of the substrate 94) and always rotates integrally with the shutter 100.

A magnetizing plate 102, which constitutes a part of the damper and serves as a driven member, is attached to the attachment portion of the shutter 100 and the arm 101. The magnetizing plate 102 is formed in a fan shape and is made of a magnetic material, and is attached to the rotary shaft 93 below the bearing 98 via a slide bearing 104. The magnetizing plate 102 is located directly below the arm 101 and between the base plate 94 and the magnetic bearing plate 102.
By being mounted via 4, the rotary shaft 93, that is, the shutter 100 and the arm 101 can rotate relative to each other.

At both ends of the fan-shaped magnetizing plate 102, the shaft 10 is provided.
6 and 108 project upward, respectively, and ring-shaped anti-vibration rubbers 110 and 112 are respectively attached to the shafts 106 and 108 as cushioning materials. These anti-vibration rubbers 110 and 112 are the above-mentioned arm 1
01, which corresponds to the shutter 100 and the arm 10.
When the magnet 1 and the magnetized plate 102 rotate relative to each other and reach the movement limit thereof, they can come into contact with the arm 101. That is, the arm 101 can rotate relative to the magnetizing plate 102 until it comes into contact with the anti-vibration rubbers 110 and 112, respectively, and when the arm 101 comes into contact with the anti-vibration rubbers 110 and 112, A magnetizing plate 102 is provided by this arm 101.
Is pressed, and the magnetizing plate 102 is driven to rotate together with the arm 101 (shutter 100).

A pair of stoppers 114 and 116 are arranged on the substrates 94 on both sides of the magnetizing plate 102. The stoppers 114 and 116 are located on the rotation locus of the magnetizing plate 102 and correspond to the anti-vibration rubbers 110 and 112, respectively. The rotation of is restricted. That is,
The magnetized plate 102 is configured to be rotatable between a state where the anti-vibration rubber 110 contacts the stopper 114 and a state where the anti-vibration rubber 112 contacts the stopper 116.

The rotation range of the magnetizing plate 102 and the rotation range of the arm 101 are set in correspondence with the position where the shutter 100 blocks the opening 95 and the position where the shutter 100 is completely separated therefrom. That is, the arm 101 is the rubber cushion 1.
10 and the anti-vibration rubber 110 is in contact with the stopper 114, the shutter 100 reaches a position that blocks the opening 95, the arm 101 abuts the anti-vibration rubber 112, and the anti-vibration rubber 112 abuts the stopper 116. The fixed positions of the stoppers 114 and 116 and the outer diameters of the vibration-proof rubbers 110 and 112 are set so that the shutter 100 reaches a position where the shutter 100 is completely separated from the opening 95 in the contact state.

On the back surface of the magnetizing plate 102 (that is, between it and the substrate 94), a sliding plate 118 constituting a magnetic braking means is integrally fixed. This sliding plate 118
Can contact the substrate 94 and has a predetermined coefficient of friction.

Further, on the back surface of the substrate 94 (that is, on the side where the solenoid 92 is fixed), a magnet 120 constituting a magnetic braking means is attached by a bracket 122. The magnet 120 corresponds to the sliding plate 118 (that is, the magnetizing plate 102), attracts the magnetizing plate 102 toward the substrate 94 by magnetic force, and presses the sliding plate 118 to the substrate 94. .

Next, the operation of this embodiment will be described. In the printer 10, when performing the printing process, the light source 38 is turned on and the negative carrier 18 is driven to position the negative film 16. Then, the LATD (average transmission density) of the negative film 16 is measured by the density measuring device 56, an exposure correction value is set from this measurement data and manually key-input data, and the exposure amount (exposure time) is calculated. , Get the optimal printing conditions.

Next, the photographic printing paper 54 is conveyed to the exposure chamber 52 and positioned on the exposure stage 94, and the shutter device 5
0 works. That is, the solenoid 92 operates and the shutter 100 opens. As a result, the light beam emitted from the light source 38 passes through the filter unit 40 and the negative film 16 and reaches the exposure chamber 52, and the printing of the image on the negative film 16 is started on the photographic printing paper 54 positioned on the exposure stage 94. The C, M, and Y filters located on the optical axis of the light beam are moved according to the exposure conditions. After the elapse of a predetermined exposure time, the solenoid 92 is activated again and the shutter 100 is closed.

Thus, the printing process for one frame of the negative film 16 is completed. By repeating this, the printed portion of the photographic printing paper 54 is sequentially transported to the reservoir section 73, and is temporarily stocked in the reservoir section 73 and then transported to the processor section.

Here, a shutter device 50 that operates when the image of the negative film 16 is printed and exposed on the photographic printing paper 54.
The operating state of will be described with reference to the operation explanatory diagrams shown in FIGS. 5 (A) to 5 (E).

As described above, the shutter 100 of the shutter device 50 is rotated by the operation of the solenoid 92.

Here, for example, in the case where the shutter 100 is moved in a direction away from the state in which the exposure opening 95 is blocked (the state shown in FIG. 2 and FIG. 5A), image printing exposure is possible. 5, the arm 101 that rotates integrally with the shutter 100 can move relative to the magnetizing plate 102. Therefore, as shown in FIGS. 5B and 5C, the arm 101 includes the magnetizing plate 102 (vibration isolator). 112) and the arm 101 is moved only. In this case, the magnetic force of the magnet 120 does not reach the arm 101 (since sliding friction resistance does not occur), the arm 1
01 is moved smoothly and is not adversely affected by the magnet 120 and the magnetizing plate 102.

When the arm 101, which rotates integrally with the shutter 100, reaches a predetermined position, as shown in FIG. 5D, the arm 101 comes into contact with one of the anti-vibration rubbers 110 of the magnetizing plate 102 (see FIG. By pressing this, the magnetizing plate 102 is moved together with the arm 101. Arm 101
A magnetizing plate 102 (vibrating rubber 11
0) reaches the stopper 114, its movement is blocked and the arm 101 and the magnetizing plate 10 are blocked, as shown in FIG.
The movements of 2 are stopped together (state shown in FIG. 3). As a result, the shutter 100 is moved away from the exposure opening 95 to enable image printing exposure.

In this case, the magnetizing plate 102 is the magnet 1
The sliding plate 118 is pressed against the substrate 94 by being attracted by the magnetic force by 20, so that the moving force of the magnetizing plate 102 (arm 101) is caused by the sliding friction resistance between the sliding plate 118 and the substrate 94. Consumed and absorbed. Therefore, after the arm 101 contacts the magnetized plate 102 (vibration isolating rubber 110) (that is, from the state of FIG. 5D to the state of FIG. 5E), the arm 101 and the magnetized The plate 102 is quickly decelerated while being smoothly decelerated, and no impact noise is generated.

Further, since the anti-vibration rubber 110 is interposed between the arm 101 and the magnetized plate 102 and between the magnetized plate 102 and the stopper 114, the arm 101 is attached to the magnetized plate 1.
02 is pressed and the magnetizing plate 102 is stopped by the stopper 114.
The impact when the temperature reaches is also absorbed by this, which is even more effective.

Further, here, the arm 101 and the magnetizing plate 1
02 is stopped by the stopper 114 (see FIG. 3,
In the state of FIG. 5 (E), the other anti-vibration rubber 112 of the magnetized plate 102 is separated from the other stopper 116, and is in a standby state for stopping the movement of the shutter 100 (arm 101) next time. Become. That is, in other words,
There is no need to reset the stop position again.

On the other hand, after the arm 101 and the magnetizing plate 102 are stopped by the stopper 114 and the shutter 100 is separated from the opening 95, the solenoid 92 is actuated again to move the shutter 100 again to a position where it blocks the exposure opening 95. When starting the arm 101, the arm 101
2, the arm 101 can be moved relative to the magnetized plate 1.
02 (vibration-proof rubber 110) and this arm 1
Only 01 is moved. In this case, the magnet 12
Since the magnetic force due to 0 does not reach the arm 101 (no sliding frictional resistance is generated), the arm 101 is moved smoothly and is not adversely affected by the magnet 120 and the magnetizing plate 102.

After that, when the shutter 100 reaches the position where it blocks the exposure opening 95, the arm 101 abuts on the other vibration isolating rubber 112 of the magnetizing plate 102 (two points in FIG. 2) as described above. By pressing this, the magnetizing plate 102 is moved together with the arm 101. Arm 10
Magnetizing plate 102 (vibration isolator 11
When 2) reaches the stopper 116, its movement is blocked and the movement of both the arm 101 and the magnetized plate 102 is stopped (the state shown in FIGS. 2 and 5A). As a result, the shutter 100 blocks the exposure opening 95 and enters a standby state for the next printing exposure.

In this case as well, the magnetizing plate 102 is attracted by the magnetic force by the magnet 120 so that the sliding plate 118 is in pressure contact with the substrate 94.
The moving force of 1) is consumed and absorbed by the sliding frictional resistance between the sliding plate 118 and the substrate 94. Therefore, the arm 10
After 1 comes into contact with the magnetized plate 102 (anti-vibration rubber 112),
The arm 101 and the magnetized plate 102 are quickly decelerated while being smoothly decelerated, and the impulsive sound is not generated.

Further, due to the interposition of the anti-vibration rubber 112, the impact when the arm 101 presses the magnetizing plate 102 and when the magnetizing plate 102 reaches the stopper 116 is also absorbed by this, and the effect is further enhanced. Target.

Also in this case, when the arm 101 and the magnetizing plate 102 are stopped by the stopper 116, one of the anti-vibration rubbers 110 of the magnetizing plate 102 is separated from the one stopper 114, and the next time. The standby state for stopping the movement of the shutter 100 (arm 101) is set. That is, also in this case, it is not necessary to reset the stop position again.

After that, the above-described operation is sequentially repeated.
That is, in the shutter device 50 having the above-described configuration, the arm 101 contacts the magnetized plate 102 (vibration isolating rubbers 110 and 112) (in other words, the arm 101 is worn for starting and stopping). Anti-vibration rubber 11 of the magnetic plate 102
0 to 112) until the arm 101 moves smoothly without being affected by others.
Magnetizing plate 102 (anti-vibration rubber 110, 11
After abutting against 2), it is quickly stopped while being decelerated by the sliding friction resistance between the sliding plate 118 and the substrate generated by the magnetic force of the magnet 120.

Further, the shutter 100 (arm 10
When 1) is stopped, the anti-vibration rubber 11 of the magnetized plate 102 is
Either one of 0 and 112 is a stopper 114, 1
It becomes a state in which it is separated from any one of 16 and becomes a standby state for the next movement stop of the shutter 100 (arm 101), and it is not necessary to reset the stop position again.

As described above, the shutter device 5 having the above structure
At 0, the shutter 100 (arm 101) that reciprocates to open and close the exposure opening 95 can be smoothly started, and can be smoothly and accurately stopped without generating an impact sound. Can be realized with a simple structure.

In the above embodiment, the magnet 120 constituting the magnetic force braking means is arranged so as to face the magnetizing plate 102 which constitutes a damper and is a driven member, but the present invention is not limited to this. A structure may be adopted in which a magnet is attached to the magnetic plate 102 itself and is pressed against the substrate 94 by magnetic force.

In the above embodiment, the magnetizing plate 10 is used.
A magnetic force braking means composed of 2 and a magnet 120 attracts the magnetizing plate 102 toward the substrate 94 by magnetic force to bring the sliding plate 118 into pressure contact with the substrate 94 and absorb the moving force by sliding friction resistance. However, the configuration is not limited to this, and the moving force may be absorbed only by the magnetic force or only by the frictional resistance. That is, for example, the sliding plate 118 may be omitted, the magnetized plate 102 may be disposed slightly apart from the substrate 94, and the moving force thereof may be absorbed only by the magnetic force, and the magnet 120 may be omitted. The sliding plate 118 may be constantly brought into pressure contact with the substrate 94 by a spring or the like to absorb the moving force by the sliding friction resistance.

Further, in the above embodiment, the arm 1
01 or the stoppers 114 and 116 to contact the magnetized plate 1
The anti-vibration rubbers 110 and 112 as the cushioning materials attached to the shafts 106 and 108 of No. 02 are simply formed in a ring shape to expose the rubber surface, but the present invention is not limited to this.
On the surface of the anti-vibration rubber 110, 112 as the cushioning material,
A configuration in which ultra-high molecular weight low-friction coefficient materials are provided in layers may be used.

For example, as shown in FIG. 7, vibration damping rubbers 130 and 132 as a cushioning material have a wall thickness of 0.3 on the surface thereof.
It is also possible to have a configuration in which slippery materials S such as ultra-high molecular weight PE sheets or Teflon sheets having a thickness of about mm are stacked and provided.
In this case, when the anti-vibration rubbers 130 and 132 (material S) come into contact with the arm 101 or the stoppers 114 and 116 and the anti-vibration rubbers 130 and 132 elastically deform to absorb the shock, the anti-vibration rubbers 130 and 132 are absorbed. Surface rubbing is reduced.
Therefore, the durability of the surfaces of the anti-vibration rubbers 130 and 132 is significantly improved (for example, 5 times or more). That is, by adopting a configuration in which ultra-high molecular weight low friction coefficient materials such as the ultra-high molecular weight PE sheets are provided in layers, the rubber characteristics of the vibration-proof rubbers 130 and 132 that absorb impact force due to elastic deformation are not impaired. The durability of the impact surface can be improved.

Further, in the above-described embodiment, the magnetizing plate 102 which constitutes a damper and serves as a driven member is arranged coaxially with the arm 101 (shutter 100) which serves as a moving member, and rotates in the same manner as the arm 101. However, the present invention is not limited to this, and the magnetized plate 102 may be arranged separately from the arm 101 and linearly movable. Even in this case, when the arm 101 (shutter 100) is stopped, the moving force can be promptly stopped while being dissipated and absorbed.

Furthermore, in the above embodiment, the shutter device 50 having a damper function which is used to open and close the exposure opening 95 of the printer 10 for printing and exposing an image on the printing paper 54 has been described. The present invention is not limited to this, and can be naturally applied to other devices, and can be appropriately used if it is necessary to smoothly stop the moving shutter without generating an impact sound.

[0074]

As described above, the present invention has the following effects.

According to the damper of the first aspect, the damping effect is great, the moving member can be stopped smoothly and with high accuracy without generating an impact sound, and this can be realized by a simple structure.

In the damper according to the second aspect, when the driven member comes into contact with the moving member or the stopper and the cushioning material elastically deforms to absorb the shock, the friction of the cushioning material surface is reduced and the durability of the cushioning material is improved. To do.

In the shutter device according to the third aspect, the shutter reciprocating to open and close the printing exposure opening can be smoothly started, and can be smoothly and accurately stopped without generating an impact sound. You can
Further, it is not necessary to reset the stop position again, and this can be realized by a simple structure.

In the shutter device according to the fourth aspect, the shutter can be smoothly and accurately stopped without generating an impact sound, and the structure is simplified.

In the shutter device according to the fifth aspect, when the driven member comes into contact with the moving member or the stopper and the cushioning material elastically deforms to absorb the shock, the friction of the cushioning material surface is reduced and the durability of the cushioning material is reduced. improves.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a shutter device having a damper function according to an embodiment of the present invention.

FIG. 2 is a plan view showing an opening blocking state of the shutter device according to the embodiment of the invention.

FIG. 3 is a plan view showing a state in which the shutter device according to the embodiment of the present invention is separated from the opening.

4 is a cross-sectional view taken along line 4-4 of FIG.

5A to 5E are schematic plan views showing a moving state of the shutter of the shutter device.

FIG. 6 is a schematic overall configuration diagram of a printer to which a shutter device according to an exemplary embodiment of the present invention is applied.

FIG. 7 is a plan view showing a structure in which a low friction coefficient material is attached to the surface of a vibration-proof rubber as a cushioning material.

[Explanation of symbols]

 10 Printer 50 Shutter Device 92 Solenoid (Drive Source) 94 Substrate 100 Shutter 101 Arm (Moveable Member) 102 Magnetizing Plate (Following Member) 110 Anti-Vibration Rubber (Cushioning Material) 112 Anti-Vibration Rubber (Cushioning Material) 114 Stopper 116 Stopper 118 Sliding plate (magnetic force braking means) 120 Magnet (magnetic force braking means)

Claims (5)

[Claims] 1. A damper for stopping a moving member moving by a driving source at a predetermined position set by a stopper, wherein the moving member is engageable with the moving member and relatively movable within a moving locus of the moving member. The driven member, which is arranged and is pressed by the moving member to move following the moving member in the state of being engaged with the moving member, contacts the stopper and prevents the movement, and the moving member and the driven member. And a cushioning member that is provided between the driven member and the stopper to absorb the impact between the moving member and the driven member and the impact between the driven member and the stopper, and a movement path of the driven member. A magnetic force braking unit that is arranged to face each other and that attracts the driven member by magnetic force and absorbs the moving force of the driven member. 2. The damper according to claim 1, wherein an ultra high molecular weight low friction coefficient material is provided on the surface of the cushioning material. 3. A predetermined range set by a pair of stoppers, comprising a shutter capable of opening and closing a printing exposure opening of a printer for printing an image of a negative film on printing paper. In a shutter device that reciprocates within a shutter device that opens and closes the printing exposure opening, the shutter device includes a pair of engaging portions that are disposed so as to be relatively movable with respect to the shutter, and that can engage with the reciprocating shutter. In a state in which one of the engaging portions is engaged with the shutter, the shutter is pressed by the shutter and moves following it, and abuts the one stopper to prevent the movement.
And between the shutter and the engaging portion, and between the shutter and the engaging portion, and between the engaging portion and the stopper, in the state where the movement is blocked, the other engaging portion is separated from the other stopper. A cushioning member that is provided between the shutter and the driven member to absorb the impact of the shutter and the impact of the driven member and the stopper, and is disposed so as to oppose the movement trajectory of the driven member, and the driven member is magnetically coupled. A magnetic force braking unit that sucks and absorbs the moving force of the driven member; 4. The shutter device according to claim 3, wherein the magnetic force braking means is replaced by a friction braking means which presses the driven member into contact therewith and absorbs the moving force of the driven member by sliding friction resistance. Shutter device. 5. The shutter device according to claim 3, wherein an ultra high molecular weight material having a low friction coefficient is provided on the surface of the cushioning material.