JPS642186Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a file search device, specifically, a base that supports a reel in which a large number of files are housed side by side in a circular shape; A selection device for retrieving one of the files from the reel is supported, and the device is rotated forward and backward by a motor so that the retrieval operation can be performed without twisting the cable connected to the selection device via the center pillar. Regarding the file search machine.

This type of file search machine was previously proposed by the applicant of the present application, and is constructed as follows.

That is, the selection device is provided with a pair of photosensors that emit light based on electrical input, receives the reflected light of the emitted light, and converts it into an electrical signal, and a light-shielding plate is provided on the base to block the light emitted by the photosensors. ,
At the end of one search operation by the selection device, this light shielding plate blocks the light emitted from the pair of photosensors in the order corresponding to the rotation direction of the selection device, and the electricity between light shielding and non-shading when only one light is blocked. The combination of signals is stored in a memory circuit, and when the selection device starts operating next time, the direction of rotation of the motor is changed according to the combination of electrical signals stored in this way, and the selection device is rotated in the opposite direction from the previous time. It is to make it.

However, since it is necessary to provide a pair of photosensors and a memory circuit, not only is the electric circuit complicated and expensive as a whole, but also when the selection device is orbiting at an intermediate position away from the position of the light shielding plate. If an accident occurs in which the selection device stops at this intermediate position due to the power supply to the electric circuit being cut off, such as in a power outage, the memory circuit will no longer have any memory of the rotation direction of the selection device before it stopped. Therefore, even if the power supply is restarted, there is a problem in that the normal operating state cannot be automatically restored.

Therefore, the present applicant has proposed a switch that first detects forward rotation and reverse rotation of a file selection device, an actuation member that operates the switch, and a first switch that operates the actuation member when the selection device rotates forward. A switch mechanism consisting of an operating member and a second operating member that operates the operating member when reversely rotated is provided, and the switch and the operating member are placed on one of the selection device and the base, and the switch mechanism is provided on one of the selection device and the base, and It has been proposed that a second operating member is provided on the other of the selection device and the base.

However, according to this search machine, the above-mentioned problem can be solved, but the electric circuit stops the selection device in a set stop area based on the detection signal of the switch that detects the forward/reverse rotation of the selection device. If a failure occurred, there was a risk that an accident would occur in which the selection device overran the stop area.

Therefore, the purpose of the present invention is to simplify the electric circuit that rotates the selection device alternately forward and backward and stops it in a set stop area in any case when searching for a file, and to search for the selection device. Even if an accident occurs in which the selection device stops at this intermediate position due to the power supply to the electrical circuit being cut off during operation, such as during a power outage,
By restarting the power supply, the normal operating state is automatically restored, and even if the electric circuit breaks down, the selection device can be reliably stopped within a set stop area.

That is, the configuration of the present invention includes a detection switch that detects forward and reverse rotation of a selection device that is rotated forward and backward by a motor, an actuating member that reversibly opens and closes these switches, and a detection switch that detects forward and reverse rotation of a selection device that is rotated forward and backward by a motor, an actuating member that reversibly opens and closes these switches, and a detection switch that detects forward and reverse rotation of a selection device that is rotated forward and backward by a motor; , a first operating member that operates the operating member;
A switch mechanism comprising a second operating member that operates the operating member during reverse rotation is provided, and the operation of the switch causes the motor to stop after a predetermined period of time, and the selection device to alternately rotate in the forward and reverse directions. On the other hand, a safety switch mechanism including a pair of first and second safety switches and a pair of third and fourth safety switches paired with these safety switches is provided,
The first and second safety switches are respectively arranged in parallel with the detection switch and actuated by the actuation member, and third and fourth operation members actuate the third and fourth safety switches. A third safety switch, which is activated when the stop position of the selection device is overrun due to the stop of the motor during forward rotation, is provided in series with the first safety switch installed in parallel with a detection switch for detecting reverse rotation. A fourth safety switch that is activated when an overrun occurs during reverse rotation is connected in series with a second safety switch installed in parallel with a detection switch that detects forward rotation, and both series circuits are connected in parallel. It is something.

The present invention will now be described with reference to the embodiments shown in the drawings.

The basic structure of the present invention is that a reel 3 that accommodates a large number of files 2 arranged side by side in a circular shape is placed on a base 1 having a center pillar 11.
1, and supports a selection device 4 which revolves around the outer periphery of the reel 3 and searches for one of the files 2 from the reel 3, The device 4 is rotated forward and reverse by a motor 5, and includes detection switches SW ₁ and SW ₂ for detecting forward and reverse rotation of the selection device 4, and switches SW ₁ and SW ₂ that are reversibly rotated. A switch consisting of an operating member 6 that opens and closes, a first operating member 71 that operates the operating member 6 when the selection device 4 rotates in the forward direction, and a second operating member 72 that operates the operating member 6 when the selection device 4 rotates in the reverse direction. A mechanism A is provided so that the motor 5 is stopped after one fixed period of time by the operation of the switches SW ₁ and SW ₂ , and the selection device 4 is alternately rotated in forward and reverse directions. 2 safety switches S ₁ and S ₂ ,
A third pair of safety switches S ₁ and S ₂
and a fourth safety switch _S3 , _S4 , and the first and second safety switches _S1 , _S2 are arranged in parallel with the detection switches _SW1 , _SW2, respectively. , third and fourth operating members 7 configured to be actuated by the operating member 6 and actuating the third and fourth safety switches S ₃ and S ₄ .
3 and 74, and a third safety switch _S3 that is activated when the stop position of the selection device 4 is overrun due to the stop of the motor 5 during forward rotation is installed in parallel with a detection switch _SW2 that detects reverse rotation. The fourth safety switch _S4 , which is activated when an overrun occurs during reverse rotation, is connected in series with the first safety switch _S1 , and the second safety switch S2, which is installed in parallel with the detection switch _SW1 , which detects forward rotation, is connected in _series . The two series circuits are connected in parallel.

Specifically, as shown in FIG. 3, the file 2 is provided with a side edge body 22 on the file main body 21, and a code code 23 on the back side of the side edge body 22 and a search lever that can freely move forward and backward with respect to the back side. 24, and the base 1 has a circular top plate 12 and an installation member 13 as shown in FIGS. A fixed gear G1 is provided around the center pillar 11 on the installation member 13, and the lower support member ₈₁ of the selection device 4 is mounted on the gear G1 via a bearing b1. A spacer _S1 is provided on the bearing _b1 , and on the spacer _S1 , around the center pillar 11,
The five reels 3... are placed in the vertical direction with the spacer S ₂ ...
are arranged in series through..., and each reel 3...
A pair of bearings b ₂ , b ₂ are respectively interposed between the upper and lower portions and the spacers S ₁ , S ₂ . . . to rotatably support each reel 3 . Further, the circular top plate 12 is fixed around the center pillar 11 on the upper bearing b ₂ of the uppermost reel 3 via a spacer S ₃ , and further, the spacer
The upper support member ₈₂ of the selection device ₄ is rotatably supported around the center pillar 11 on S3 via a bearing _b3 , and a fixed gear G2 is mounted in the support member 82 on the bearing b3. It is arranged and fixed to the upper end of the center pillar 11. Further, the motor 5 is provided above the tip of the upper support member 82, and a connecting support member 83 of the selection device 4 that revolves around the outer periphery of each reel 3 between the tips of the upper and lower support members 82, 81. Concatenate. And the upper and lower support members 8
A drive shaft D is rotatably supported between 2 and 81, and a drive gear G3 of the motor 5 is provided at its upper end, and a transmission gear G4 is provided at its lower end.
Between fixed gear G2 and transmission gear G4, fixed gear G1
A drive belt V is provided between them.

The reel 3 is composed of a circular lower plate 31, a circular upper plate 32, and a cylindrical body 33 that connects the lower plate 31 and the upper plate 32 at a constant interval in the vertical direction. A plurality of file storage sections 35 are provided partitioned by partition plates 34, and
A positioning plate 37 having positioning grooves 36 arranged in a row at regular intervals in the circumferential direction is attached to the outer peripheral ends of the lower and upper plates 31 and 32, as shown in FIG.

Next, the selection device 4 is provided with a reader 41 for reading the code 23 of the file 2 on the connection support member 83, and an electric actuator 42 that causes the search lever 24 to be activated by being struck. .
And a separate operation box (not shown)
an input device 45 for inputting information using a keyboard having an input key 43 and a number key 44; an output device 46 for outputting an input signal from the input device 45 via an encoder, a shift register, and a counter; a decoder 47; a display device 48; An output device 49 for the read signal of the reader 41, a comparison circuit 50 that compares the output data of both the output devices 46 and 49 and outputs a matching signal when both data match, and the electrical operation by the output signal of the circuit 50. Control of body 42, drive circuit 5
1 and 51, and connect them as shown in the electric circuit shown in FIG. Then, the selection signal from the number key 44 of the keyboard is inputted from the input device 45 to the comparison circuit 50 via the output device 46, and the code code 23 of the desired file 2 is read by the reader 41 of the rotating selection device 4. Then, the read signal is input to the comparison circuit 50, and when the two input signals match, the electric actuator 42 outputs an actuation signal and the search lever 24 is tapped to search for the desired file 2. ing.

Therefore, the switch mechanism A has its first,
As shown in FIG. 2, the second operating members 71 and 72 are arranged concentrically on the circular top plate 12 at regular intervals in the circumferential direction and at equal distances from the center of the center pillar 11. Both are plate-shaped and parallel to the top plate 12, and the former is mounted at a higher height from the top plate 12 than the latter using pins 91 and 92, as shown in FIG. 5b.
Both members 71 and 72 have cam portions 71a and 72a formed at opposite radially outer corners of the top plate 12 for operating the actuating member 6. These members 71 and 72 may be disposed below the selection device 4 so as not to interfere with the rotation of the selection device 4, or if they are disposed at an intermediate height position of the device 4. , forming a downwardly opening passage in the device that avoids these members 71 and 72.

Further, the operating member 6 of the switch mechanism A and the switches SW ₁ and SW ₂ are mounted within the upper support member 82 via a plate-shaped mounting member 93 as shown in FIGS.

That is, the mounting member 93 is attached to the support member 82 by the first and second operating members 71 and 71 on the top plate 12.
The switches SW ₁ and SW ₂ are installed on the lower surfaces of the right and left sides of the mounting member 93 as shown in FIG. 5. These switches SW ₁ and SW ₂ are normally closed type micro switches equipped with operating levers, with the operating levers facing each other, and the free end of each lever being radially inward of the top plate 12. In addition, the distance from the center of rotation of the support member 82 is made slightly larger than the distance between the first and second operating members 71 and 72.

The actuating member 6 is formed in a generally convex shape with a large portion and a small portion connected by a plate material, with the small portion facing radially outward from the top plate 12 and the large portion facing toward the center of the top plate 12, and the generally central portion of this member 6 is pivotally supported via a pin 94 to an attachment portion between the switches _SW1 and _SW2 in an attachment member 93, and the upper and lower surfaces of the large portion have protruding lengths corresponding to the heights of the first and second operating members 71 and 72, respectively.
The cam portions 71a and 72a are provided with protrusions 61 and 62 that come into contact with each other by rotating forward and backward as indicated by solid and dotted arrows.
A resilient member 63a is provided between the narrow portion and the mounting member 93.
Therefore, an unstable switching mechanism 63 having the above function is provided.

As shown in FIG. 5, this switch mechanism A rotates the support member 82 in the positive direction as indicated by the solid line arrow, and brings it close to the first operating member 71 just before the end of the rotation, so that the upward protrusion 61 on the right side is brought into contact with the cam portion 71a, and reverse operation is performed from the state in which the left switch SW ₂ was pressed to the state in which the right switch SW ₁ is pressed, and the protrusion 61 is moved without being obstructed by the first operating member 71. It is constructed so that it can pass through to the left, and as described later, the stop position A ₁ in Fig. 2 is formed.
After stopping at this position, the support member 82 can be passed through even when the reverse rotation starts from this position _A1 , and the support member 82 can be rotated in the opposite direction as indicated by the dotted line arrow. 2 operation member 72, the left downward protrusion 62 comes into contact with the cam part 72a, and the right switch SW ₁
The switch SW ₂ on the left side is reversed from the state in which it was pressed to the state in which it is pressed, and the protrusion 62 is moved to the second position.
It can be passed through to the right without being obstructed by the operation member 72, and the stop position shown in FIG.
After stopping at _B1 , it is possible to pass through even when forward rotation starts from this position _B1 .

Further, an electric circuit is constructed as shown in FIG. 4 to control the forward and reverse rotation of the motor 5 by the switches SW ₁ and SW ₂ .

That is, the switches SW ₁ and SW ₂ are connected to the decoder 53.
, so that when each switch SW ₁ and SW ₂ is turned on, the output is output from each separate output section. First and second AND circuits 54 and 55 are provided, and one of the two input sections of each circuit 54 and 55 is connected to the output section of the input key 43, and the other is connected to the output section of the decoder 53. The output part of each AND circuit 54, 55 is connected to the control circuit 5.
6. Connect to the motor 5 via the drive circuit 57.

The control circuit 56 is equipped with a timer T, and rotates the selection device 4 in forward and backward directions to turn off the switches SW ₂ and SW ₁ by means of the first and second operating members 71 and 72. Conversely, when the switches SW ₁ and SW ₂ are turned off, the timer T causes the motor 5 to output a stop signal after a certain period of time, and the motor 5 is suddenly stopped by the attached brake, thereby controlling the selection device. 4 is stopped at the stop positions A ₁ and B ₁ as shown in FIG.

Next, the safety switch mechanism B
The fourth operating members 73 and 74 are placed on the circular top plate 12 as shown in FIG. The distance between the first and second operation members 73 and 74 is larger than that of the first and second operation members 73 and 74 and is different from each other and spaced apart in the circumferential direction. The member 73 is located near the inside of the first operating member 71, and the fourth operating member 74 is located near the second operating member 72.
It is placed near the inside of the housing and is attached using pins 96 and 95. And these members 7
3 and 74 are also disposed below the selection device 4, or if they are disposed at an intermediate height position of the device 4, a passage is provided in the device 4 to avoid these members 73 and 74. .

Further, the first to fourth safety switches S ₁ to _{S 4}
Both are of the same type as the detection switches SW ₁ and SW ₂ , that is, normally closed type micro switches equipped with an operation lever, and the first and second safety switches S ₁ and S ₂ are switch
Together with SW ₁ and SW ₂ , they are attached to the mounting member 93 so that they operate in a double-pole, single-throw manner by the operating member 6 . In addition, the third and fourth safety switches S ₃ and S ₄
In this case, on the lower surface of the mounting member 93, the operating levers are placed on the lower side and are stacked in opposite directions in the length direction, and the length direction corresponds to the arc direction of the third and fourth operating members 73, 74, and the push operation is performed. It is possible to attach it via a mounting plate 97. As mentioned above, the series circuit of the first and third safety switches S ₁ and S ₂ and the second,
A parallel circuit with the series circuit of the fourth safety switches S ₂ and S ₄ is interposed between the output section of the control circuit 56 and the input section of the motor 5.

Note that 58 is a stopper of the actuating member 6.

In the above configuration, a large number of files 2 accommodated in the file accommodating portion of the reel 3...
A case where one of the reel 3 is searched will be explained. The selection device 4 is now in the position shown in FIG.
It is assumed that the motor is stopped at A ₁ , that is, the terminal position of forward rotation, or in other words, the starting position of reverse rotation. in this case,
Switch SW ₁ is off, switch SW ₂ is on, and the first, third, and fourth safety switches are turned on as shown in Figure 6a.
S ₁ , S ₃ , and S ₄ are on, the second safety switch S ₂ is off, and the series-parallel switch circuit of the safety switch mechanism B is on.

First, use the number key 44 on the keyboard to select the number key 44 that corresponds to the code symbol of file 2.
Select and operate to output a selection signal, and
The input key 43 is operated.

As a result, the first AND circuit 54 is activated and a reverse rotation signal is output to the motor 5 via the safety switch mechanism B in the on state, and the selection device 4 starts reverse rotation from the starting end position _A1 .

By the way, in the series-parallel circuit of each safety switch S ₁ ...S ₄ of the safety switch mechanism B, the selection device 4 is set to the positions B ₂ , B ₃ , B ₄ , B ₅ , in the reverse rotation order as shown in FIG.
Depending on the location of B ₆ and B ₁ , each switch S ₁ ...
_S4 performs switching operations as shown in FIGS. 6b, c, d, e, f, and g and FIG. 7. That is, the position
B ₂ means that the fourth safety switch S ₄ is the fourth operating member 7.
This is the position where the safety switches S ₁ and S ₂ are turned on in series as shown in Figures 6b and 7, so they are all in the on state. . Further, the position B ₃ is the position where the fourth safety switch S ₄ is released from the push operation by the fourth operating member 74 and returns to the ON state, and the position
B ₄ is the position where the selection device 4 is searching for the file 2 after passing through the position of the first operation member 71. Since it is not operated by the member 71 when passing, both positions B ₃ , B ₄ both in Figure 6 c, d, and 7
As shown in the figure, only the second safety switch _S2 is turned off, and the entire switch is kept on. Further, the position _B5 is the position where the selection device 4 finishes searching the file 2 and the second operating member 7
2, the actuating member 6 hits the cam portion 72a and operates in reverse, that is, the switches SW ₂ and SW ₁ are switched off and on, and the timer T of the control circuit 56 starts counting. With the first and second safety switches S ₁ and S ₂ also turned off and on, the second safety switch in series, as shown in Figures 6e and 7,
Since the fourth safety switches S ₂ and S ₄ are on, the entire state is maintained in the on state. Furthermore, the position B ₆ is
This is the position where the third safety switch S3 connected in series with the first safety switch _S1 in the _OFF state is pressed by the third operation member 73 and turned off, and the second safety switch S3 in series with the first safety switch S1 in the OFF state is turned off. , and the fourth safety switches S ₂ and S ₄ remain on, so that the entire state is maintained in the on state. Further, the position _B1 is the position where the third safety device _S3 is released from the push operation by the third operating member 73 and is turned back on, and only the first safety switch S1 is turned on as shown in FIGS. 6g and ₇ . off and remains on throughout.

In this manner, the selection device 4 begins to rotate in reverse, and the search for the file 2 is completed, and the second operating member 72
By reaching the position, the reverse rotation detection switch SW ₂ is activated and the timer T starts counting. Even if safety switch S ₃ is turned off and then turned on, motor 5
Therefore, even when the motor 5 reaches near the end position _B1 , the motor 5 continues to be powered and driven.
By de-energizing the reverse rotation signal by the timer T, the motor 5 is braked to the terminal position B ₁
It will be stopped.

By the way, as described above, the electric circuit that drives and controls the motor 5 breaks down, and the selection device 4 is in the terminal position.
If the reverse rotation signal continues to be output even after reaching B ₁ ,
When the device 4 reaches the position of the fourth operating member 74, the fourth safety switch _S4 is turned off by the fourth operating member 74, so that the safety switch is turned off as shown in FIGS. 6h and 7.
Each series circuit of S ₁ , S ₃ , S ₂ , and S ₄ is turned off,
The motor 5 is immediately forcibly de-energized.

Further, when the electric circuit is healthy, when the number key 44 and the input key 43 are operated to search for the next file 2, the second AND circuit 55 is activated and the correct A rotation signal is output to the motor 5, and the selection device 4 selects the position.
It starts rotating forward from _B1 . In this case, the operating state of the series-parallel circuit of the safety switches _S1 ... _S4 and the operating state of the motor 5 by the electric circuit are basically exactly the same as in the case of reverse rotation described above, so please refer to the following for details. Although not described, in short, in the series-parallel circuit, the selection device 4 overruns the forward rotation terminal position _A1 , and the third safety switch _S3
Until it is operated by the third operating member 73, it is kept in the ON state as a whole, and only when it is operated in this way does it become in the OFF state as a whole.
Therefore, when the electric circuit is normal, the selection device 4 searches the file 2 and selects the terminal position.
If the electric circuit fails and _the terminal position _A1 is overrun, the operation member 7 is stopped.
The brake is stopped at position 3.

As described above, even if an accident occurs in which the selection device 4 stops midway due to the power supply to the electric circuit being stopped due to a power outage during operation in which the selection device 4 is rotated forward and backward alternately to search for the file 2, the power supply will continue. The said switch kept in the on state by restarting the
Power is supplied to the motor 5 via SW ₂ and SW ₁ , and the search operation can be completed without any problems. Moreover, even if the electric circuit that controls the operation of the selection device 4 breaks down,
The selection device 4 is in the terminal position by the safety switch mechanism B.
When B ₁ and A ₁ are overrun, they are immediately stopped.

The above explanation is based on the case where the reel 3 is provided in five stages, but it goes without saying that the reel 3 is not limited to five stages and can be applied to each stage of one or more stages. .

Further, the operating member 6, switches SW ₁ , SW ₂ ,
Safety switch _S1 ... _S4 and first to fourth operating members 7
1...74, the former may be provided on the top plate 12 and the latter on the support member 82 of the selection device 4, or may be provided at arbitrary corresponding positions on the base 1 and the selection device 4. good.

Furthermore, the first to fourth operating members 71 to 74 may be directly fixed to the top plate 12 by fixing means such as screws, without using the pins 93 to 96.

As described above, according to the present invention, even if the power supply to the electric circuit is cut off due to a power outage during the search operation of the selection device, even if an accident occurs in which the selection device stops midway, it is always kept in the on state. The motor is electrically connected to rotate in the specified direction via the switch in the switch mechanism, so when the power supply is restarted, power is supplied to the motor via the switch that remains on, and the motor automatically returns to the specified direction without any hindrance. You can complete the search drive by rotating in the direction.

Furthermore, since the forward/reverse rotation of the selection device is detected by a switch of a switch mechanism, the electric circuit can be simplified without the need for complex circuits such as photo sensors and memory circuits.

Even if the electric circuit breaks down and the selection device begins to overrun the end position of forward/reverse rotation, the safety switch mechanism will immediately stop it, eliminating accidents such as twisting of the wires due to overrun, and the overall It has fewer breakdowns, is highly safe, easy to maintain, and can be economically advantageous.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional front view, FIG. 2 is a partially cutaway front view, FIG. 3 is an explanatory diagram showing the relationship between a file and a selection device, and FIG.
The figure is an electrical circuit diagram, and Figure 5a is the X-
5b is a cross-sectional view taken along the Y-Y line in _FIG . FIG _{. 4} is an explanatory diagram of the operation of S4. 1... Base, 2... Reel, 3... File,
4... Selection device, 5... Motor, 6... Operating member, 71... First operating member, 72... Second operating member, 73... Third operating member, 74... Fourth operating member, A ...Switch mechanism, SW ₁ , SW ₂ ...Detection switch, B ...Safety switch mechanism, _S1 ...First safety switch, _S2 ...Second safety switch, _S3 ...Third safety switch, S ₄ ...Fourth safety switch.

Claims (1)

[Scope of utility model registration request] A base having a center pillar supports a reel that accommodates a large number of files arranged side by side in a circular shape, and the base has a reel that rotates around the outer circumference of the reel to retrieve one of the files from the reel. A file search device that supports a selection device and rotates the selection device in forward and reverse directions using a motor, comprising a detection switch that detects forward and reverse rotation of the selection device, and a detection switch that reversibly opens and closes these switches. an actuating member to actuate; and a first operating member to actuate the actuating member when the selection device rotates forward;
A switch mechanism comprising a second operating member that operates the operating member during reverse rotation is provided, and the operation of the switch causes the motor to stop after a certain period of time, and the selection device to alternately rotate in the forward and reverse directions. a pair of first and second safety switches, and a pair of third and fourth safety switches paired with these safety switches.
a safety switch mechanism comprising a safety switch, wherein the first and second safety switches are respectively arranged in parallel with the detection switch and actuated by the actuating member;
third and fourth operation members for operating a safety switch are provided, and the third safety switch is operated when the stop position of the selection device is overrun due to the stop of the motor during forward rotation, and a detection switch for detecting reverse rotation is provided. A fourth safety switch is installed in series with the first safety switch, which is installed in parallel with the
A file search device characterized in that a safety switch is connected in series with a detection switch for detecting forward rotation and a second safety switch installed in parallel, and both series circuits are connected in parallel.