JPH11254653A - Double swinging cover with detector for printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double swinging cover with a detector for a printer for avoiding a fault or a deterioration of a sensor by widely obtaining an operating space in the case of opening the cover, enhancing an operating efficiency, and reducing the number of sensors to suppress a cost of a product. SOLUTION: When an opening/closing cover 10 is opened at a cover fulcrum pin 13 as a center, a cam 6 is rotated via a link piece 7, a link arm 4 and a block 5. Then, a detecting head 2T of a limit switch 2 is removed from a cutout 6H of the cam 6, and pressed to output a detection signal. And, when the cover 10 is integrated with a support arm 3a and opened at an arm fulcrum pin 11 as a center, the cam 6 is integrally rotated, the head 2T of the switch 2 is pressed to output the detection signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double door with a detector for a printing press, and more particularly to a double door with a detector for a printing press provided with a detector for detecting the opening when the cover is opened in any direction. About the cover.

[0002]

2. Description of the Related Art FIG. 8 shows the overall structure of a four-color printing offset printing press. This printing press comprises a first unit 41, a second unit 41,
A unit 42, a third unit 43, and a fourth unit 44 are provided. Each unit is provided with various cylinders as shown, and these cylinders convey the sheet while rotating. In each unit, a different color is printed on the sheet. Note that details are omitted in the overall configuration of FIG.

[0003] The sheet fed from the feeder section 40 is fed to an impression cylinder 47 via a paper feed cylinder 46 in the first unit 41.
And between the blanket cylinder 49. Plate cylinder 4 is attached to blanket cylinder 49
8 is transferred, and the transferred print image is printed on a sheet. The sheet fed from the impression cylinder 47 is transferred into the second unit 42 by the transfer cylinder 50.

[0004] Thereafter, similarly, each printing is performed in the second unit 42, the third unit 43, and the fourth unit 44. Thereafter, the sheet fed from the impression cylinder 47 of the fourth unit 44 is discharged to the delivery unit 45 through the discharge cylinder 53.

[0005] Each blanket cylinder 49 in the first unit 41, the second unit 42, the third unit 43, and the fourth unit 44 is provided with a blanket cylinder cleaning device 51. The blanket cylinder cleaning device 51 includes roll paper. The roll paper is in contact with the blanket cylinder 49, and is cleaned by wiping off dirt on the blanket cylinder 49 while winding the roll paper.

The first unit 41 and the second unit 4
2, each impression cylinder 4 in the third unit 43 and the fourth unit 44
7 are each provided with an impression cylinder cleaning device 52.
The impression cylinder cleaning device 52 is also provided with roll paper similarly to the blanket cylinder cleaning device 51, and performs cleaning by wiping the impression cylinder 47 while winding the roll paper.

Here, it is necessary to perform maintenance such as replacement of roll paper for the blanket cylinder cleaning device 51 and the impression cylinder cleaning device 52. In this case, the opening / closing cover 54,
After opening 55, 56, 57 and 58, the operator replaces the roll paper of the blanket cylinder cleaning device 51 and the impression cylinder cleaning device 52. Among these, regarding the open / close covers 55, 56, 57,
When the cover is opened, the blanket cylinder cleaning devices 5 located on both sides
1. Both the roll paper of the impression cylinder cleaning device 52 needs to be replaced.

FIG. 9A shows a conventional structure of the opening / closing cover 56. A similar configuration is used for the opening / closing covers 55 and 57. The opening / closing cover 56 can be opened around the shaft 61 in the direction of arrow 92. After opening the cover 56 in the direction of the arrow 92, the blanket cylinder cleaning device 51 shown in FIG.
The roll paper of the impression cylinder cleaning device 52 is replaced.

If the cover 56 is accidentally opened during the printing operation, the rotating impression cylinder 47 and the transfer cylinder 50 are rotated.
Foreign matter may be inserted from the outside toward the printer, which may hinder the printing operation. For this reason, the shaft 61 shown in FIG. 9A is provided with a sensor for detecting that the open / close cover 56 has opened in the direction of the arrow 92.

The sensor detects that the cover 56 has been opened, and forcibly stops the printing operation. As the sensor, for example, a magnetic sensor, an optical sensor, a micro switch, or the like is used.

FIG. 9B is a diagram showing another conventional technique.
In the conventional configuration shown in FIG. 9B, two divided opening / closing covers 56a and 56b are provided. The split open / close covers 56a and 56b can be opened in the directions of arrows 92 and 91, respectively, about the same shaft 62. A similar configuration is used for the opening / closing covers 55 and 57.

When performing maintenance of the blanket cylinder cleaning device 51, the work is performed by opening the divided open / close cover 56a in the direction of arrow 92. When the maintenance of the impression cylinder cleaning device 52 is performed, the work is performed by opening the divided opening / closing cover 56b in the direction of the arrow 91.

[0013] Further, as a conventional double-opening mechanism of a cover, there is a double-opening device for a door disclosed in Japanese Utility Model Laid-Open No. 55-112675. FIG. 10 schematically shows this apparatus. One end of a frame 64 is connected to the main body 63 by a hinge shaft 64J, and the frame 64 can be opened and closed in directions of arrows 92 and 94 about the hinge shaft 64J. The frame 64 has an opening 64K.

A door 65 is connected to the other end of the frame 64 via a hinge shaft 65J. This door 65 is a hinge shaft 6
It can be opened and closed in the directions of arrows 91 and 93 around 5J. Normally, the frame 64 is closed in the direction of the arrow 94 and the door 6 is closed.
5 is closed in the arrow 93 direction.

When the door 65 is opened in the direction of arrow 91, the door 6
5 is opened centering on hinge axis 65J. As described above, since the opening 64K is formed in the frame 64, internal maintenance or the like can be performed through the opening 64K.

When the door 65 is opened in the direction of the arrow 92, the door 65 and the frame 64 are integrally opened with the hinge shaft 64J as the center. After the frame 64 and the door 65 are integrally opened, maintenance work and the like in the main body 63 can be performed.

When the conventional structure shown in FIG. 10 is applied to the open / close covers 55, 56 and 57 shown in FIG. 8, it is necessary to provide a sensor for detecting that the door 65 has been opened. The sensors are provided on the shaft portion in relation to the peripheral mechanism, and two sensors are provided for the hinge shafts 64J and 65J.

[0018]

Each of the above-mentioned conventional configurations has the following problems. First, in the configuration shown in FIG. 9A, when the opening / closing cover 56 is opened in the direction of arrow 92, a relatively large work space can be secured for maintenance of the blanket cylinder cleaning device 51 shown in FIG. be able to. However, when the maintenance of the impression cylinder cleaning device 52 is performed, there is a problem that the open / close cover 56 acts as an obstacle, resulting in a narrow work space and a decrease in work efficiency.

On the other hand, in the configuration shown in FIG. 9B, the shaft 62 is located at the center, and the divided open / close covers 56a and 56b open in the directions of arrows 91 and 92, respectively. . Therefore, the maintenance work of the impression cylinder cleaning device 52 is relatively easy as compared with the configuration shown in FIG. 9A.

However, since the two divided open / close covers 56a and 56b are selectively opened in the directions of arrows 91 and 92, respectively, the work space is limited to the divided open / close covers 5a and 56b.
Only the size corresponding to one of 6a and 56b can be secured. Therefore, there is a problem that the working space is narrowed and the working efficiency is reduced.

On the other hand, the structure of the frame 64 and the door 65 shown in FIG.
When applied to 7, the above-mentioned problem is solved. That is, when performing maintenance of the blanket cylinder cleaning device 51 or the impression cylinder cleaning device 52 illustrated in FIG. 8, depending on whether the maintenance target is the blanket cylinder cleaning device 51 or the impression cylinder cleaning device 52,
It is possible to select whether to open the door 65 in the direction of the arrow 91 or in the direction of the arrow 92.

As described above, since the door 65 shown in FIG. 10 can be opened in any of the directions of the arrows 91 and 92, it is possible to select a direction in which the door 65 does not hinder the work while securing a large work space. Can be opened. However, since the door 65 has the two hinge shafts 64J and 65J, it is necessary to provide two sensors for detecting the opening of the door 65, and there is a problem that the cost of the product increases. .

Further, since the door 65 is double-opened, when the door 65 is opened in the direction of the arrow 92, the hinge shaft 65J itself becomes the main body 63.
Will be located away from Therefore, the hinge shaft 6
A sensor for directly detecting the movement of 5J cannot be housed and provided in the main body 63, and is provided on the door 65 side.

Therefore, when the door 65 is opened, the hinge shaft 6
There is a possibility that the sensor for detecting 5J may hinder the work and reduce the work efficiency. The sensor is the door 6
Since it is provided on the fifth side, there is a problem that a failure or deterioration occurs due to an external impact or the like.

Accordingly, the present invention can secure a wide working space when the cover is opened, and can improve the working efficiency, reduce the number of sensors, reduce the cost of the product, and furthermore, the failure or deterioration of the sensors. It is an object of the present invention to provide a double-sided cover with a detector for a printing press that can avoid the problem.

[0026]

According to the first aspect of the present invention, there is provided a double-sided cover with a detector for a printing press according to the present invention.
The cover can be opened and moved in the first direction or the second direction. Therefore, the direction in which the cover is opened and moved can be freely selected according to the work situation, and work efficiency can be improved.

The first central axis and the second central axis are separated by a predetermined distance, and they are not common. Therefore, for example, the cover can be selectively opened and moved in the first direction or the second direction instead of dividing the cover into two parts and moving the cover in the first direction and the second direction. For this reason, a wide working space after opening the cover can be secured.

Further, the detector recognizes that the cover has opened and moved in the first direction or the second direction and outputs a detection signal. For this reason, when the cover is opened in either the first direction or the second direction, for example, measures such as stopping the driving of the printing press can be performed, and the occurrence of work trouble can be prevented.

Further, the number of detectors is single, and not a plurality of detectors. For this reason, a wider working space after opening the cover can be secured, and the cost of the product can be reduced.

In the double cover with detector of the printing press according to the second aspect, the first detection target portion and the second detection target portion are configured as the same detection target portion. It is located near the first central axis or the second central axis.

For example, when the detection target portion is located at a portion distant from the first central axis or the second central axis, when the cover is opened, the detector interferes with the work, and the work efficiency may be reduced. . In addition, there is a possibility that the detector is susceptible to external impact or the like and deteriorates.

On the other hand, since the detection target portion is located near the first center axis or the second center axis, the detector can be easily placed in a place where the work is not obstructed when the cover is opened. It can be stored and positioned, and a decrease in work efficiency can be avoided. Further, deterioration of the detector can be prevented.

Further, in the vicinity of the first central axis or the second central axis, the amount of movement when the cover is opened and moved is relatively small. Therefore, by detecting the detection target portion located near the first center axis or the second center axis, a slight opening of the cover is not erroneously detected, and erroneous detection is reliably prevented. Can be.

In the double-sided cover with the detector for the printing press according to the third aspect, the cover can be opened and moved in the first direction or the second direction. Therefore, the direction in which the cover is opened and moved can be freely selected according to the work situation, and work efficiency can be improved.

The first central axis of the first axis and the second central axis of the second axis are separated by a predetermined distance, and they are not common. Therefore, for example, the cover can be selectively opened and moved in the first direction or the second direction instead of dividing the cover into two parts and moving the cover in the first direction and the second direction. For this reason, a wide working space after opening the cover can be secured.

Further, the detector recognizes that the cover has opened and moved in the first direction or the second direction and outputs a detection signal. For this reason, when the cover is opened in either the first direction or the second direction, for example, measures such as stopping the driving of the printing press can be performed, and the occurrence of work trouble can be prevented.

The cam is provided in the vicinity of the first shaft, and the detection projection of the detector is brought into contact with the cam. Here, for example, when the detector is located at a position distant from the first axis, when the cover is opened, the detector may hinder the work, and the work efficiency may be reduced. In addition, there is a possibility that the detector is susceptible to external impact or the like and deteriorates.

On the other hand, since the cam is provided in the vicinity of the first shaft and the detector is positioned with respect to this cam, the cam is provided in a place where the work is not hindered when the cover is opened.
The detector can be easily housed and positioned, and a decrease in work efficiency can be avoided. Further, deterioration of the detector can be prevented.

Further, in the vicinity of the first axis, the amount of movement when the cover is opened and moved is relatively small. Therefore, by detecting the cam provided near the first shaft, a slight opening of the cover is not erroneously detected, and erroneous detection can be reliably prevented.

The detector outputs a detection signal based on a change in the pressed state of the detection projection due to the rotational movement of the cam. Therefore, by freely setting the distance from the rotation center of the cam to the outer periphery, it is possible to easily and surely control the pressing state of the detection protrusion of the detector with respect to the opening movement of the cover in the first direction or the second direction. Can be.

Further, the link portion transmits the opening and closing of the cover about the second shaft to the cam, and rotates the cam in accordance with the opening and closing. Therefore, the opening movement of the cover in the second direction can be transmitted to the cam, and the opening movement of the cover in the first direction or the second direction can be easily and easily performed by a single detector provided for the cam. It is possible to reliably detect.

As described above, the number of detectors is one, and not a plurality of detectors. For this reason, a wider working space after opening the cover can be secured, and the cost of the product can be reduced.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a double cover with a detector of a printing press according to the present invention will be described with reference to the drawings.
FIG. 1 is a bottom view of the double cover in the present embodiment, and FIG. 2 is an enlarged view showing details in the vicinity of the frame 21 shown in FIG. FIG. 3 is an enlarged side view of the cam 6 shown in FIG.

FIG. 4 is a sectional view taken in the direction of arrows II in FIG. 1, showing a closed state, and FIG.
FIG. 6 is a cross-sectional view in the direction of arrow I, showing a first open state. FIG. 6 is a cross-sectional view in the direction of arrow II shown in FIG. 1, showing a second open state. 7A is an enlarged view near the limit switch 2 in FIG. 4, FIG. 7B is an enlarged view near the limit switch 2 in FIG. 5, and FIG. 7C is an enlarged view near the limit switch 2 in FIG.

In the double opening cover according to the present embodiment, the opening / closing cover 10 can be opened in the direction of arrow 92 around the arm fulcrum pin 11 (see FIG. 5), and the opening / closing cover 10 has the cover fulcrum pin 13 connected thereto. It can be opened in the direction of arrow 91 as the center (see FIG. 6). The opening operation of the cover 10 is detected by the limit switch 2, and when the cover 10 is opened in any direction, the printing operation of the printing press is forcibly stopped.

Hereinafter, the double cover according to the present embodiment will be described in detail. As shown in FIGS. 1 and 2, an arm fulcrum pin 11 as a first shaft is provided through one frame 21 of the printing press. Arm fulcrum pin 11 is frame 2
1 is rotatably held. The central axis of the arm fulcrum pin 11 is the first central axis in the present embodiment.

One end of the support arm 3a is supported so as to be openable and closable around the arm fulcrum pin 11 in the directions of arrows 92 and 94 (see FIG. 4). Arm fulcrum pin 1
The arm 1 and the support arm 3a are not fixed to each other, and the arm fulcrum pin 11 is attached to the support arm 3a in a free state. The support arm 3a is a support in the present embodiment.

An arm fulcrum pin 12 is provided through the other frame 22 of the printing press (see FIG. 1). One end of the support arm 3b is integrally fixed to the arm fulcrum pin 12. Arm fulcrum pin 12
Is rotatably held with respect to the frame 22.

The support arm 3a located on the frame 21 side
A cover fulcrum pin 13 as a second axis is attached to the other end of the support arm 3b, and a cover fulcrum pin 14 is provided at the other end of the support arm 3b located on the frame 22 side.

The center axis of the cover fulcrum pin 13 is the second center axis in the present embodiment,
The frame 22 is the printing press main body in the present embodiment.
Further, the arm fulcrum pin 11 and the cover fulcrum pin 13 are located apart from each other by a predetermined distance.

Here, a link piece 7 is provided integrally with the opening / closing cover 10 as a cover, and the link piece 7 is supported by a cover fulcrum pin 13. Link piece 7
Is provided only on the frame 21 side. A block is provided integrally on the frame 22 side of the opening / closing cover 10 and is supported by the cover fulcrum pin 14. As a result, the opening / closing cover 10 is attached to the cover fulcrum pins 13 and 1.
4 can be opened and closed in the directions of arrows 91 and 93.

A connecting pin 15 is provided at the tip of the link piece 7 fixed to the opening / closing cover 10. FIG.
As shown in (1), the axis of the connecting pin 15 is arranged at a position separated from the axis of the cover fulcrum pin 13 by a predetermined distance. That is, when the cover 10 is opened in the direction of the arrow 91, the link piece 7 swings around the cover fulcrum pin 13, and the connecting pin 15 moves around the cover fulcrum pin 13 in the rotation direction.

One end of the link arm 4 is rotatably supported by the connecting pin 15. On the other hand, the block 5 is integrally fixed to the arm fulcrum pin 11 described above. A connecting pin 16 is provided at the tip of the block 5. As shown in FIG. 7B and FIG.
Is disposed at a position separated from the axis of the arm fulcrum pin 11 by a predetermined distance.

The other end of the link arm 4 is connected to a connecting pin 16 provided on the block 5. The link arm 4 is rotatably attached to the connection pin 16. Thus, when the cover 10 is opened in the direction of the arrow 91, the opening operation of the cover 10 is transmitted to the arm fulcrum pin 11 via the link piece 7, the link arm 4, and the block 5, and the arm fulcrum pin 11 is It rotates in response to the opening operation of 10. The link piece 7, the link arm 4, and the block 5 are a link section in the present embodiment.

As shown in FIGS. 1 and 2, a cam 6 is provided at the outer end of the arm fulcrum pin 11 penetrating the frame 21. The cam 6 is fixed to the arm fulcrum pin 11, and rotates integrally in the directions of arrows 97 and 98 (FIG. 7) in accordance with the rotation of the arm fulcrum pin 11. The cam 6 is the detection target portion, the first detection target portion, or the second detection target portion in the present embodiment.

The cam 6 has a notch 6H as shown in FIG.
Are formed. Due to the formation of the notch 6H, the lengths of the radius L1 and the radius L2 from the cam center point 6P as the center of rotation to the outer periphery of the cam 6 are different.

As shown in FIGS. 4 and 7A, the detection head 2T of the limit switch 2 as a detector is disposed so as to fit into the notch 6H of the cam 6. The limit switch 2 is fixed to the frame 21 by bolts.

In this embodiment, the limit switch 2 constituted by a mechanical switch is used as a detector, but, for example, an optical sensor or a magnetic sensor may be employed. The detection head 2T of the limit switch 2 is always urged in the direction of arrow 96. The detection head 2T is a detection protrusion in the present embodiment.

In this embodiment, the opening / closing cover 10 is
A stopper mechanism is provided such that when opened in two directions or the direction of arrow 91, the opening / closing cover 10 stops at the opening angle shown in FIGS. By this stopper mechanism, the opening of the opening / closing cover 10 is stopped in the state shown in FIG. 5 or FIG. 6, and this opened state is maintained. For this reason, the opening / closing cover 10 does not hinder the work, and the work efficiency can be improved.

Hereinafter, the structure of the stopper mechanism will be described. As shown in FIG. 1, brackets 23 and 24 are fixed to both sides of the opening / closing cover 10.
The shaft 17 penetrates through 3, 24. Shaft 17
Are rotatably supported by brackets 23 and 24. Hooks 25 and 26 are provided at both ends of the shaft 17, respectively.

The shaft 17 and the hooks 25 and 26 are integrally fixed.
It can swing in the direction (FIG. 4). The hooks 25 and 26 try to rotate in the direction of the arrow 93 due to their own weight, but are prevented from rotating in contact with the stoppers 27 and 28 fixed to the support arms 3a and 3b. Stopper 27,
28 is provided at the tip of the fulcrum pins 19 and 20 (see FIG. 1). In addition, engagement concave portions 25H and 26H are formed at the tips of the hooks 25 and 26, respectively.

The support arms 3a and 3b are provided with pins 29 and 30, respectively.
Hooks 31 and 32 are rotatably supported at 0, respectively. The hooks 31 and 32 can swing in the directions of arrows 92 and 94 (FIG. 4). The hooks 31 and 32 try to rotate in the direction of arrow 94 due to their own weight, but are prevented from rotating in contact with the stoppers 33 and 34 fixed to the frames 21 and 22. Note that engagement concave portions 31H and 32H are formed at the tips of the hooks 31 and 32, respectively.

As a link mechanism for operating the hooks 31 and 32 integrally, a link 35 is provided on the frame 21 side.
A link 37 is provided, and a link 36 and a link 38 are provided on the frame 22 side. That is, on the frame 21 side, the hook 31 is provided with a link pin 31P at a position separated from the pin 29 by a predetermined distance, and the link 3 is swingable about the link pin 31P.
One end of 5 is attached.

A fulcrum pin 19 is provided on the support arm 3a, and one end of a link 37 is attached so as to be swingable about the fulcrum pin 19. And link 35
And the other end of the link 37 are connected by the shaft 18.

On the frame 22 side, the hook 32 is provided with a link pin 32P at a location separated from the pin 30 by a predetermined distance, and one end of the link 36 is swingable about the link pin 32P. Installed. A fulcrum pin 20 is provided on the support arm 3b, and one end of a link 38 is attached so as to be swingable about the fulcrum pin 20. The other end of the link 36 and the other end of the link 38 are connected by the shaft 18 described above.

As described above, the hooks 31, 32 are integrally connected through the links 35, 37, 36, 38 and the shaft 18. If a shaft is provided on the pins 29 and 30 to operate the hooks 31 and 32 integrally, when the opening / closing cover 10 is opened in the direction of the arrow 91, the shaft will hinder the work.

In this embodiment, since the links 35 and 37 and the links 36 and 38 are used, the shaft 18 can be located near the cover fulcrum pins 13 and 14. Therefore, when the cover 10 is opened around the cover fulcrum pins 13 and 14, the shaft 18 does not hinder the work, and the work efficiency can be improved.

Next, the opening and closing operation of the double cover according to the present embodiment will be described in detail. In the closed state shown in FIG. 4, the support arms 3a and 3b are closed in the direction of arrow 94, and the open / close cover 10 is closed in the direction of arrow 93.
In this state, the detection head 2T of the limit switch 2 is fitted into the notch 6H of the cam 6 as described above, and the detection head 2T protrudes in the direction of the arrow 96.

When maintenance of the blanket cylinder cleaning device 51 is performed from this closed state, for example, the opening / closing cover 10 is opened in the direction of the arrow 92 integrally with the support arms 3a and 3b.
A state in which the cover 10 is opened in the direction of the arrow 92 is a first open state (see FIG. 5). Note that the direction of arrow 92 is the first direction in the present embodiment.

When the cover 10 and the support arms 3a, 3b are opened in the direction of the arrow 92, the engagement recesses 31H, 32H formed on the hooks 31, 32 engage the stoppers 33, 34, respectively. Thereby, the opening / closing cover 1
0, the opening operation of the support arms 3a and 3b in the direction of the arrow 92 is restricted with this engagement position as a limit, and the first opening state shown in FIG. 5 is maintained.

When the cover 10 and the support arms 3a and 3b are opened in the direction of the arrow 92, the cam 6 also rotates in the direction of the arrow 97 correspondingly. As described above, the support arm 3a is in a free state with respect to the arm fulcrum pin 11, but when the support arm 3a is opened in the direction of the arrow 91, the link piece 7, the link arm 4, and the link arm 4, which are fixed to the opening / closing cover 10. The block 5 also moves together.

Since the arm fulcrum pin 11 is fixed to the block 5, by opening the open / close cover 10 and the support arms 3a and 3b in the direction of the arrow 92, the arm fulcrum pin 11 is fixed to the arm fulcrum pin 11 as a result. The cam 6 also rotates in the direction of arrow 97 in conjunction with it.

When the cam 6 rotates in the direction of the arrow 97, the detection head 2T of the limit switch 2 separates from the notch 6H of the cam 6, and the detection head 2T is moved by the cam outer peripheral portion P1 side of the cam 6 (FIG. 7A). It will be pressed. By this pressing, the detection head 2T is pushed in the direction of the arrow 95 against the urging (FIG. 7B), and a detection signal is output from the limit switch 2 through the cable 9. The control unit of the printing press recognizes that the open / close cover 10 has been opened based on the detection signal, and stops the printing operation.

When the cover 10 is closed together with the support arms 3a and 3b in the direction of arrow 94 from the first open state shown in FIGS. 5 and 7B, the cam 6 also rotates in the direction of arrow 98 in response to this. It returns to the closed state shown in FIG. 7A. That is, the detection head 2T of the limit switch 2 is fitted into the notch 6H of the cam 6, and the detection head 2T is urged and protrudes in the direction of the arrow 96.

As a result, the detection signal output through the cable 9 of the limit switch 2 is stopped, and the control unit of the printing press recognizes that the cover 10 is closed. Then, the control unit returns the printing operation to a state in which the printing operation can be restarted.

The opening / closing cover 10, from the first opened state,
When closing the support arms 3a and 3b in the direction of arrow 94, one of the hooks 31 and 32 may be lifted in the direction of arrow 92 and rocked. As mentioned above, hook 3
1, 32 are integrally connected through links 35, 37, 36, 38 and the shaft 18.

Therefore, if one of the hooks 31 and 32 is swung in the direction of arrow 92, the hook 3
1 and the engaging recess 32H formed on the hook 32 are both stoppers 33, 3H.
4, the cover 10 and the support arms 3a and 3b can be closed in the arrow 94 direction. For this reason, work efficiency can be improved.

Next, for example, when the maintenance of the impression cylinder cleaning device 52 is performed, the opening / closing cover 10 is opened in the arrow 91 direction. The state where the cover 10 is opened in the direction of the arrow 91 is the second open state (see FIG. 6). Note that the direction of arrow 91 is the second direction in the present embodiment.

When the cover 10 is opened in the direction of the arrow 91, the engagement recesses 25 formed in the hooks 25, 26 are formed.
H and 26H engage stoppers 27 and 28, respectively. Thereby, the opening operation of the opening / closing cover 10 in the direction of the arrow 91 is restricted with this engagement position as a limit, and the second opening state shown in FIG. 6 is maintained.

When the cover 10 is opened in the direction of arrow 91, the cam 6 also rotates in the direction of arrow 98 in response to the opening. As described above, one end of the link arm 4 is connected to the distal end of the link piece 7 provided integrally with the opening / closing cover 10 by the connection pin 15. A block 5 is connected to the other end of the link arm 4 via a connection pin 16, and the block 5 is connected to an arm fulcrum pin 11.
It is fixed to.

Therefore, the opening operation of the opening / closing cover 10 in the direction of the arrow 91 is transmitted to the arm fulcrum pin 11 by the link piece 7, the link arm 4 and the block 5, and the cam 6 fixed to the arm fulcrum pin 11 is moved. The rotation operation is performed in the direction of arrow 98.

When the cam 6 rotates in the direction of the arrow 98, the detection head 2T of the limit switch 2 is separated from the notch 6H of the cam 6, and the detection head 2T is moved by the cam outer peripheral portion P2 side of the cam 6 (FIG. 7A). It will be pressed. By this pressing, the detection head 2T is pushed in the direction of the arrow 95 against the urging (FIG. 7C), and a detection signal is output from the limit switch 2 through the cable 9. The control unit of the printing press recognizes that the open / close cover 10 has been opened based on the detection signal, and stops the printing operation.

When the cover 10 is closed in the direction of arrow 93 from the second open state shown in FIGS. 6 and 7C, the cam 6 also rotates in the direction of arrow 97 in response to this, and the closed state shown in FIGS. Return to. That is, the detection head 2T of the limit switch 2 is fitted into the notch 6H of the cam 6, and the detection head 2T is urged and protrudes in the direction of the arrow 96.

As a result, the detection signal output through the cable 9 of the limit switch 2 is stopped, and the control unit of the printing press recognizes that the open / close cover 10 is closed. Then, the control unit returns the printing operation to a state in which the printing operation can be restarted.

When the cover 10 is closed in the direction of arrow 93 from the second open state, the hook 25 or the hook 2
6 may be lifted in the direction of arrow 91 and rocked. As described above, the hooks 25 and 26 are connected to the shaft 1
7 are integrally fixed.

Therefore, if one of the hooks 25 and 26 is swung in the direction of arrow 91, the hook 2
5 and the engaging recess 26H formed on the hook 26 are both stoppers 27, 2
8, the cover 10 can be closed in the direction of the arrow 93. For this reason, work efficiency can be improved.

As described above, the opening / closing cover 10 can be opened and moved in the direction of the arrow 92 around the arm fulcrum pin 11 and the arrow 91 around the cover fulcrum pin 13.
Opening movement is possible in the direction. Therefore, the direction in which the opening and closing cover 10 is opened and moved can be freely selected according to the work situation, for example, whether the maintenance of the blanket cylinder cleaning device 51 or the maintenance of the impression cylinder cleaning device 52, and the working efficiency can be improved. .

The axis of the arm fulcrum pin 11 and the axis of the cover fulcrum pin 13 are separated by a predetermined distance, and they are not common. Therefore, for example, as in the prior art shown in FIG.
Instead of opening in two directions, use the arrow 9
It can be selectively opened and moved in one direction or the arrow 92 direction. For this reason, it is possible to secure a wide working space after the opening and closing cover 10 is opened.

Further, the limit switch 2 outputs a detection signal upon recognizing that the open / close cover 10 has moved in the direction of the arrow 91 or the direction of the arrow 92. For this reason, when the opening / closing cover 10 is opened in any of the directions of the arrows 91 and 92, for example, measures such as stopping the driving of the printing press can be taken, and the occurrence of work trouble can be prevented.

The cam 6 is provided for the arm fulcrum pin 11, and the detection head 2T of the limit switch 2 is brought into contact with the cam 6. Here, for example, when the limit switch 2 is located at a position distant from the arm fulcrum pin 11, for example, at the center of the open / close cover 10 in FIG. 4, the limit switch 2 hinders the work when the open / close cover 10 is opened. Work efficiency may be reduced. Further, there is a possibility that the limit switch 2 is easily affected by an external impact or the like and deteriorates.

On the other hand, the cam 6 is connected to the arm fulcrum pin 1
1 and the limit switch 2 is positioned with respect to the cam 6, so that the limit switch 2 can be easily housed and located in a place where it does not hinder the work when the opening / closing cover 10 is opened. Thus, a decrease in work efficiency can be avoided. Further, deterioration of the detector can be prevented.

Further, in the vicinity of the arm fulcrum pin 11, the amount of movement when the opening and closing cover 10 is opened and moved is relatively small. Therefore, by detecting the cam 6 provided on the arm fulcrum pin 11, a slight opening of the opening / closing cover 10 is not erroneously detected, and erroneous detection can be reliably prevented. In the present embodiment, the cam 6 is provided directly on the arm fulcrum pin 11, but the detection target may be located near the arm fulcrum pin 11 or the cover fulcrum pin 13.

The limit switch 2 outputs a detection signal based on a change in the pressed state of the detection head 2T due to the rotational movement of the cam 6. Therefore, the cam 6
By setting the radii L1 and L2 from the cam center point 6P to the outer periphery freely, the arrow 91 direction or the arrow 92
The pressing state of the detection head 2T of the limit switch 2 with respect to the opening movement of the opening and closing cover 10 in the direction can be easily and reliably controlled.

That is, the notch 6 of the cam 6 shown in FIG.
By controlling the notch depth L3 of H, it is possible to easily set the pushing depth suitable for the effective stroke of the detection head 2T for operating the limit switch 2. Further, by controlling the notch length L4 of the notch 6H of the cam 6 shown in FIG. 3, the degree of opening of the open / close cover 10 and the output timing of the detection signal from the limit switch 2 can be easily set. .

Further, the link piece 7, the link arm 4 and the block 5 transmit the opening and closing of the opening / closing cover 10 about the cover fulcrum pin 13 to the cam 6, and rotate the cam 6 according to the opening and closing. Therefore, the opening / closing cover 1
0 can be transmitted to the cam 6 in the direction of the arrow 92.
The opening movement in the direction can be easily and reliably detected by a single limit switch 2 provided for the cam 6.

As described above, the limit switch 2 is a single one and not a plurality. For this reason, a wider working space after opening the opening / closing cover 10 can be ensured, and the cost of the product can be reduced.

The double cover with detector of the printing press according to the present invention is not limited to the above embodiment. For example, in the above-described embodiment, a single cam 6 has been exemplified as the detection target portion, the first detection target portion, or the second detection target portion. However, for example, a first detection target portion that moves in response to the cover that opens and moves in the first direction and a second detection target portion that moves in response to the cover that opens and moves in the second direction are separately provided. The opening movement of the first detection target portion or the second detection target portion may be detected by a single detector.

In the above embodiment, the cam 6 is provided separately from the opening / closing cover 10, but a part of the cover may be detected as the first detection target portion or the second detection target portion. Further, any configuration other than the cam may be used as long as it moves in response to the cover that has opened and moved in the first direction and moves in response to the cover that has opened and moved in the second direction.

The shapes of the cam 6 and the notch 6H are not limited to those described in the above embodiment, and other shapes can be used. Further, the support arm 3a is illustrated as an example of the support portion. However, the support arm 3a can be opened and closed around a first axis provided on the main body of the printing press, and can be opened and closed around a second axis. May be adopted.

Further, in the above embodiment, the link piece 7, the link arm 4, and the block 5 are illustrated as the link portions. However, other configurations can be used as long as the opening / closing of the cover about the second axis is transmitted to the cam and the cam is rotated in accordance with the opening / closing.

[Brief description of the drawings]

FIG. 1 is a bottom view of a double-sided cover showing an embodiment of a double-sided cover with a detector of a printing press according to the present invention.

FIG. 2 is an enlarged view showing details in the vicinity of a frame 21 shown in FIG.

FIG. 3 is an enlarged side view of the cam 6 shown in FIG.

FIG. 4 is a sectional view taken in the direction of arrow II in FIG. 1 and shows a closed state.

FIG. 5 is a sectional view taken in the direction of arrow II shown in FIG.
It is a figure showing an open state.

6 is a sectional view taken in the direction of arrow II shown in FIG.
It is a figure showing an open state.

7A is an enlarged view near the limit switch 2 in FIG. 4, FIG. 7B is an enlarged view near the limit switch 2 in FIG. 5, and FIG. 7C is an enlarged view near the limit switch 2 in FIG.

FIG. 8 is a side view showing the overall configuration of a four-color printing offset printing press.

FIGS. 9A and 9B are side views showing a conventional cover.

FIG. 10 is a plan view showing a conventional double door.

[Explanation of symbols]

 2 Limit switch 2T Detection head 3a Support arm 4 Link arm 5 Block 6P Cam 6P ··· Cam center point 7 ···· Link piece 10 ···· Open / close cover 11 ··· Arm fulcrum pin 13 ····· Cover fulcrum pin 21/22 ···· Frame L1, L2 ... Radius

Claims (3)

[Claims] 1. A cover provided on a printing press main body, the cover being capable of opening and moving in a first direction about a first central axis, and being separated from the first central axis by a predetermined distance. A cover which can be opened and moved in a second direction about a second central axis located, and a first which moves in accordance with the cover which has been opened and moved in the first direction
A detection target portion, which moves in response to the cover that has been opened and moved in the second direction;
Detecting the movement of the detection target unit, the first detection target unit or the second detection target unit,
A single detector that detects that the cover has opened and moved in the first direction or the second direction and outputs a detection signal. 2. The double cover with a detector of a printing press according to claim 1, wherein the first detection target portion and the second detection target portion are configured as the same detection target portion. A double-sided cover with a detector for a printing press, which is located near the first center axis or the second center axis. 3. A support portion provided on the printing press main body and capable of opening and closing around a first axis, and a cover provided on the support portion and capable of opening and closing around a second axis, the cover being integral with the support portion. A cover that opens and moves in the first direction about the first axis and opens and moves in the second direction about the second axis, and is provided near the first axis, and the distance from the rotation center to the outer circumference is A different cam, a cam that rotates according to the opening and closing of the support portion about the first axis, a link that transmits opening and closing of the cover about the second axis to the cam, and rotates the cam according to the opening and closing. A single detector having a detection protrusion abutting on the outer periphery of the cam, wherein the first central axis of the first axis and the second central axis of the second axis are separated by a predetermined distance. The detector detects the protrusion by rotating the cam. A double-sided cover with a detector for a printing press, which recognizes that the cover has opened and moved in the first direction or the second direction based on a change in the pressing state of the cover and outputs a detection signal.