JPH0730352Y2 - Steps between printing units - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a printing unit that is supported by a printing unit such as a multi-color printing machine so as to be openable and closable so as to cover a lower printing cylinder or the like and serve as a scaffold when changing ink. It is about the inter-step.

[Conventional technology]

Between the printing units of the multi-color printing machine, openable and closable steps that cover the lower printing cylinder are supported by the left and right frames, and are used for changing ink, maintenance and inspection of the upper rollers, etc. Work on this step as a scaffold. When the printing cylinder below the step is to be maintained or cleaned, this step is opened or removed to perform the work.

FIG. 3 and FIG. 4 are schematic side views of conventional steps between printing units. In the structure shown in FIG. 3, the stay 3 is supported by connecting the left and right frames 4 to the middle portion between the adjacent printing units 1 and 2.
Two front and rear steps 5 and 6 are supported on the stay 3 by hinges or the like so as to be openable and closable. When maintaining the printing cylinder on the printing unit 1 side, step 5 is opened in the direction of arrow A, and when maintaining the printing cylinder on the printing unit 2 side, step 6 is performed. Open in the direction of arrow B to perform. Furthermore, in the case of ink change, etc., steps 5 and 6 are closed, and work is carried out on it.

Next, in the structure shown in FIG. 4, between the adjacent printing units 1 and 2, a frame body 8 that can be opened and closed centering on a fulcrum 7 on the frame 4 side and a fulcrum 9 on the frame 8 side is centered. Step 10 that can be opened and closed is stacked. When the printing cylinder on the printing unit 2 side is to be maintained, step 10 is opened in the direction of arrow C around the fulcrum 9, and when the printing cylinder on the printing unit 1 side is to be maintained. , Step 10 and the frame body 8 are overlapped and opened in the direction of arrow D around the fulcrum 7. Further, in the case of changing ink, the frame 8 and the step 10 are superposed and closed as shown by the solid line in the figure, and the work is carried on the step 10.

[Problems to be solved by the device]

However, among the conventional steps between printing units shown in FIG. 3, only the step 5 (6) on one side is opened at the time of work, so that there is a problem that the work space is small and the work is difficult. It was In addition, the one shown in FIG. 4 has a wide working space, but has a large number of parts such as the frame 8 and the step 10 and hinges, and further limits the machine operation motor to be unstartable for safety when the step is opened. Since it is necessary to provide two switches, there is a problem that the equipment cost including wiring is high.

[Means for Solving the Problems]

In order to solve such a problem, in the present invention, a pair of left and right support bars pivotally supported inside the left and right frames so as to stand up and down in the front-rear direction of the printing unit, and the support bars are supported on the rotation end side. A step plate that is pivotally mounted in a direction opposite to the direction of rotation of the bar so that it can be erected up and down, and extends between the front and rear printing units, and detection that disables the machine operation motor by its operation provided on the frame side Device, a cam mechanism that operates the detector by the standing motion of the support bar, and another cam that is interposed between the cam mechanism and the step plate and that operates the detector by the standing motion of only the step plate. And the mechanism.

[Action]

When the one end of the step plate is pulled up and pulled up, the step plate pivots around the pivotal portion and stands up, and the lower part between both printing units and one printing unit side are opened. When the other end of the step plate is pulled up and pulled up, the step plate and the support bar are integrally erected, and the lower part between both printing units and the other printing unit side are opened. Then, in any direction, the detector operates via the cam mechanism and the motor for operating the machine base becomes unstartable.

〔Example〕

1 and 2 show an embodiment of steps between printing units according to the present invention. FIG. 1 is a plan view of the step and FIG. 2 is a sectional view taken along line II-II of FIG. In the figure, between the printing unit 11 and the printing unit 12, a pair of support plates 13 and 14 formed in the shape of a horizontally long rectangular plate are fixed to the side surfaces of the left and right frames 15 with a plurality of bolts 16, Pins 17 project inward and are rotatably supported at the ends of the left and right support plates 13 and 14 on the printing unit 11 side. 18 is the left and right pins
A pair of left and right support bars that are fitted with pin holes in 17 and fixed with setscrews 19, are formed in a horizontally long rectangular plate shape, and are in slidable contact with the support plates 13 and 14 on the frame 15 side. And extends between both printing units 11, 12. The support bar 18 is rotatably supported by a pin 17 and is configured to rotate between a horizontal laid posture shown by a solid line in FIG. 2 and a substantially upright standing posture shown by a chain line. Has been done.

Cams 21 are fixed to the pins 20 planted at the pivotal support ends of the left and right support bars 18 with set screws, and these left and right cams 21 are connected by one plate member 22a of a long hinge 22. There is. A step plate 23 formed in a rectangular plate shape is fixed to one plate member 22a of the hinge 22 and the upper end flat surface of the cam 21, and both the cam 21 and the hinge 22 have a pin 20 as a center. 2 is configured to rotate between a horizontal laid posture shown by a solid line and a substantially upright standing posture shown by a chain line. The step plate 23 has a tip bent into a hook shape, and two triangular reinforcing members
a is projected. Further, at two flat portions of the step plate 23, grips 23b, 23c to be gripped when opening and closing the step plate 23 are provided.
Is projected on the surface. Furthermore, the other plate material 22 of the hinge 22
An auxiliary step plate 24 having a width approximately the same as that of the step plate 23 having an L-shaped cross section is fixed to b, and as shown by a solid line in FIG. It is configured to rotate between an upright posture and a collapsed posture in which it is stored as shown by a chain line. 24a is an auxiliary step plate 2
It is a balance weight that is fixed to 4 to maintain its standing and lying posture, and 24b is an auxiliary step plate 2
It is a stopper that regulates the standing end of 4. And. After the auxiliary step 24 is laid down on the step 23 side and the support bar 18 is erected as described above, the step plate 23 is erected along with this, and the auxiliary step plate 24 also moves integrally in the stored state. To do. Also, in the same way, auxiliary step 24
When the step plate 23 is erected after being laid down on the step plate 23 side, the auxiliary step 24 moves along with the step plate 23 in the stored state.

A cam lever 25, which constitutes a cam mechanism, is rotatably attached to a support plate 13 by a pivot 26 below the rear half of the support bar 18 on the printing unit 11 side. An arcuate cam 27 forming a cam mechanism together with the cam lever 25 is integrally formed at the side rear end portion. Further, the support plate 13 is supported via a bracket 29 with a limit switch 28 that is actuated by pressing the contacts and disables the motor for operating the machine stand.
A tension spring 31 that urges the cam lever 25 in a direction to press the support bar 18 is stretched between the free end portion of 25 and the spring receiver 31 on the support plate 13 side. By doing so, when the support bar 18 is erected, the cam 27 pushes the cam lever 25 to rotate it to the position shown by the chain line in FIG. 2 and pushes the contact of the limit switch 28, so that the motor cannot be started. Is configured to be. Reference numeral 32 is a stopper that is planted on the side of the support plate 13 and that engages with the concave groove of the support bar 18 to regulate the rotation limit of the support bar 18.

On the other hand, below the front portion of the support bar 18 on the printing unit 12 side, a lever 33 that constitutes a cam mechanism together with the cam 21 is provided with a pivot 34.
Each of the free ends of the lever 33 is rotatably pivoted by a cam 21 and a cam lever 25 which is a part of the cam mechanism.
Is facing. By doing so, the step plate 23
When the cam is raised, the cam 21 integral with the cam 21 rotates to push the free end portion of the lever 33 on the outer peripheral cam surface thereof and rotate it in the counterclockwise direction in FIG. 2, so that the cam lever 25 rotates. By pressing the contact of the limit switch 28, the motor cannot be started.

The operation of the steps between printing units configured as described above will be described. During the printing operation, the step plate 23 is closed to cover the lower printing cylinder and the like, and the auxiliary step plate 24 stands up in the position shown by the solid line in FIG. 2 to cover the printing unit 12 side. Operations such as maintenance and ink change of the inking device are performed on the step plate 23.

When performing maintenance or inspection on the lower side of the step plate 23 or on the side of the printing unit 11, pull up the step plate 23 with the handle 23c and rotate the pin 20 counterclockwise in FIG. Since it moves and stands up as shown by the chain line, step plate 23
And the work surface of the printing unit 11 is opened. The auxiliary step plate 24 is stored in the position shown by the chain line 24A in FIG. As the step plate 23 rotates, the cam 21 integrated with the step plate 23 rotates, and the cam lever 25 is pulled through the lever 33 to pull the spring 31.
Since it is rotated to the position shown by the chain line in FIG. 2 against the pulling force of, the contact of the limit switch 28 is pressed and the motor cannot be started. Therefore, the motor does not start accidentally during maintenance and inspection work and is safe. After the work is completed, when the step plate 23 is laid down to the solid line position and closed, the cam lever 25 returns to the solid line position by the tensile force of the tension spring 31, the contact of the limit switch 28 is released, and the motor can be started. At the same time, the lever 33 also returns to the solid line position. After that, the auxiliary step 24 is erected at the solid line position and closed to the printing unit 12 side.

When performing maintenance and inspection of the lower side of the step plate 23 and the printing unit 12 side from this state, the auxiliary step plate 24 is laid down to the position of the chain line, and then the step plate 23 is held by holding the handle 23b.
When is pulled up, the step plate 23, the support bar 18, and the auxiliary step plate 24 are rotated to the chain line position in FIG. 2 to stand up, so that the work surface is opened. By the rotation of the support bar 18,
The cam 27 at the rear end pushes the cam lever 25 against the pulling force of the tension spring 31 to rotate it to the chain line position, so that the contact of the limit switch 28 is pressed and the motor cannot be started. Therefore, the motor does not start accidentally during maintenance and inspection work and is safe. After the work is completed, when the step plate 23 or the like is laid down to the solid line position, the cam lever 25 is returned to the solid line position by the tensile force of the tension spring 31, so that the contact of the limit switch 28 is released and the motor can be started. . In this way, in this device, one limit switch 28
It is safe to open the step plate 23 in either direction only by providing the.

[Effect of device]

As is apparent from the above description, according to the present invention, a pair of left and right support bars pivotally supported in the front-rear direction of the printing unit are erected so that the print unit can be erected and erected at the pivoting end side. And a step plate extending between the front and rear printing units, a detector that makes it impossible to start the machine operating motor by its operation, a cam mechanism that operates this detector by the standing motion of the support bar, and this cam. By providing another cam mechanism that is interposed between the mechanism and the step plate and operates the detector by the standing motion of only the step plate, it is possible to perform a simple operation by only holding one end of the step plate and pulling it up. Since the work surface between the printing unit on the open end side and both printing units can be widely opened, workability such as maintenance, inspection and cleaning is improved, and the structure and opening / closing work are simplified. In addition, whichever side the step plate is opened to can be dealt with by providing only one limit switch, the facility cost including wiring can be reduced, and the wiring can be simplified without impairing the appearance.

[Brief description of drawings]

1 and 2 show an embodiment of steps between printing units according to the present invention. FIG. 1 is a plan view thereof, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 and FIG. Each of the drawings is a schematic side view of a conventional step between printing units. 11,12… Printing unit, 13,14… Support plate, 15… Frame,
17 ... pin, 18 ... support bar, 20 ... pin, 21 ... cam, 23 ... step plate, 25 ... cam lever, 27 ... cam, 28 ... limit switch, 31 ... tensile spring, 33 ... lever.

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right support bars pivotally supported inside the left and right frames so as to stand up and down in the front-rear direction of the printing unit, and the rotation direction of the support bars is opposite to the rotation end side of the support bars. In the direction of up and down, the step plate being pivotally attached so as to be able to tilt up and down and extending between the front and rear printing units, a detector provided on the frame side for making the machine stand drive motor unstartable by its operation, and the support bar standing upright. A cam mechanism for activating the detector by operation and another cam mechanism interposed between the cam mechanism and the step plate for activating the detector by the standing motion of only the step plate are provided. And the steps between printing units.