JPS6318182B2 - - Google Patents

Description

[Detailed Description of the Invention] When printing a photosensitive material for plate making etc., usually
A flexible airtight sheet such as rubber is used to cover the large original plate and the photosensitive material, which are polymerized and placed on the transparent plate for exposure of the printing frame, and the original plate and the photosensitive material are made transparent by vacuum action. After bringing it close to the light plate, it is exposed.

A device that semi-automatically performs the above operation involves wrapping an airtight sheet around a spring roller that is urged to rotate around its axis by an internal coil spring, and wrapping the front end of the airtight sheet around a transparent plate. By fixing the sheet to the front edge and moving the spring roller toward the rear end of the translucent plate against the coil spring, the airtight sheet is expanded and the original plate and photosensitive material placed thereon are separated. There is a device that covers the airtight sheet and pushes out the air between the airtight sheet and the transparent plate using a squeezing roller that rolls on the airtight sheet together with a spring roller, and then sucks the air.

However, in conventional printers using the above-mentioned device, both rollers are always on the top of the printer body, which obstructs the process of polymerizing the original plate and photosensitive material and placing them on the transparent plate. The disadvantage is that it is bad.

In the present invention, a stepped portion is provided at the front upper part of the main body, and the rollers are automatically positioned on the stepped portion before the printer starts operating or when the printer is not in use. The present invention relates mainly to a printing frame apparatus for plate making, which eliminates the above-mentioned drawbacks, and will be specifically described below with reference to the accompanying drawings.

In the following description, "front" refers to the direction in which the airtight sheet is rolled up, and "back" refers to the direction in which the airtight sheet is unfolded.

1 to 5 show a first embodiment of the present invention, in which 1 is a housing, 2 is a transparent plate such as a glass plate mounted on the upper plate 1a of the housing 1, and 3 is the upper plate 1a
4 is a light source for printing.

On the front part of the upper plate 1a (left side of the drawing), there is a step-shaped
A low stepped portion 5 is provided, and elongated holes 6, 6 facing in the front-rear direction are cut in both left and right sides.

On the upper outer surface of the partition plate 1c, which is provided close to the inside of the left and right side plates 1b of the housing 1 and parallel to each side plate 1b, there is a rail 7 that faces the front-rear direction and has a slight gap with the partition plate 1c. are fixed respectively.

Below the front of each rail 7 are driven sprockets 8a and 8b that are arranged close to each other vertically.
A drive sprocket 9 is located below the rear, and a partition plate 1
The sprockets 8a, 8b, and 9 are pivoted around the sprockets 8a, 8b, and 9, and an endless chain 10 is wound around the sprockets 8a, 8b, and 9.

The upper surface of the driving sprocket 9 is located slightly lower than the upper surface of the upper driven sprocket 8a, and therefore,
The upper running surface of the endless chain 10 is slightly inclined rearward and downward.

Directly below the upper running surface of the endless chain 10, a chain holder 11 that is close to and parallel to the endless chain 10 is fixed to the partition plate 1c.

Reference numeral 12 denotes a rectangular running body, and rollers 13 pivotally installed near its four corners clamp the upper and lower edges of the rail 7 so that they can run freely.

Upper rollers 13, 13 lined up before and after the traveling body 12
The front and rear small rollers 1 are located at the upper inner side and the lower inner side of the lower rollers 13, 13, respectively.
4 and 14 are pivotally installed with a slight interval between them, and the small rollers 14 and 14 arranged in front and behind each other sandwich the front and rear sides of the vertically oriented lifting rod 15.

The lower end of the lifting rod 15 is pivotally connected to the endless chain 10 with a horizontal pin 16, and the upper end thereof also protrudes from the elongated hole 6, and a horizontally elongated bearing fitting 17 is fixed to the upper end.

As shown in FIGS. 2 and 5, the endless chain 10 has a horizontal pin 16 connected to a lower driven sprocket 8.
It is caused to reciprocate from the front surface of the upper driven sprocket 8a through the front surface and upper surface of the upper driven sprocket 8a to just before the drive sprocket 9 by a motor (not shown).

Therefore, as the endless chain 10 runs, the lifting rod 15 supported by the running body 12 moves up and down while always facing in the vertical direction, and is guided by the upper running surface of the chain 10 and moves back and forth along the rail 7. Run.

Although not shown, the left partition plate 1c of the housing 1
A device similar to that described above is also provided symmetrically, and both left and right bearing fittings 17 are connected by a connecting rod 18 in the left and right direction.

Vertical hole 1 bored in the front lower part of both bearing fittings 17
9, both ends of the squeezing roller 20 are pivotally supported.

Fixed shaft 2 fixed between the rear and upper parts of both bearing fittings 17
1 has a spring roller 22 pivoted around a fixed shaft 21 by an internal coil spring (not shown) so as to rotate with its upper portion facing forward.

The spring roller 22 has a flexible light-shielding airtight sheet 2 made of rubber or the like, whose free end extends downward and forward.
3 is wound, and a band iron 24 protruding from both sides is fixed to the lower surface of the free end.

Reference numeral 25 denotes a cover for the rollers 20 and 22 that is fixed to the upper ends of the left and right lifting rods 15. At both ends of the cover 25, there are front U-shaped engagement hooks 26.
is fixed.

As shown in FIG. 2, when the horizontal pin 16 at the lower end of the lifting rod 15 is located at the front end of the lower driven sprocket 8b, both rollers 20 and 22 are on the stepped portion 5 of the housing 1.

At this time, the squeezing roller 20 rides on the stepped portion 5 by sandwiching the free end of the airtight sheet 23, and the airtight sheet 23 wrapped around the spring roller 22 is placed on the stepped portion 5.
The airtight sheet 23 between the rollers 20 and 22 is inclined at a predetermined angle, and is spaced slightly upwardly.
is engaged with the engagement hook 26.

When the baking frame having the above-mentioned configuration starts to run backwards from the state shown in FIG.
The horizontal pin 16 rises until it reaches the front end of the upper driven sprocket 8a, and until the horizontal pin 16 reaches the upper end of the sprocket 8a, it moves backward and upward in an arc shape and reaches the position shown by the imaginary line in FIG. Become.

Then, the lower ends of the lifting rods 15 are connected to the chain receiving rods 1 through the endless chain 10.
While being supported by 1, it starts running backwards on the transparent plate 2.

At this time, as shown in FIG. 4, the band iron 24 is engaged with the front end surface of the transparent plate 2,
As the sheet moves backward, the airtight sheet 23 is spread over the transparent plate 2 and covers the original plate and the photosensitive material (both not shown) on the transparent plate 2.

In addition, at this time, the rolling ironing roller 20 presses the airtight sheet 23 from the upper surface by its own weight,
Push out the air.

As shown by the imaginary line in FIG. 5, the diameter of the airtight sheet 23 wrapped around the spring roller 22 changes as the spring roller 22 moves backward.
The diameter gradually becomes smaller, but as mentioned above, the lifting rod 15
Since the chain support 11 that supports the chain rod 11 is slightly inclined backward and downward, the spring roller 22 is slightly lowered, and the angle of inclination of the airtight sheet 23 between the spring roller 22 and the squeezing roller 20 is always almost constant. It is maintained.

Furthermore, since the squeezing roller 20 is pivotally supported in the vertically elongated hole 19 of the bearing fitting 17, it rolls on the upper surface of the airtight sheet 23 with appropriate pressure, regardless of the lowering of the elevating rod 15.

When the endless chain 10 is reversed and the lifting rod 15 is advanced, the spring roller 22 automatically moves forward while winding up the airtight sheet 23 on the transparent plate 2, and when it reaches the front end of the transparent plate 2, Engagement hook 2
6 has scooped up the band iron 24, the lifting rod 15 descends through the reverse path described above and returns to the state shown in FIG.

As described above, the baking frame of the present invention has the upper surface of the cover 25 and the transparent plate 2 before starting operation or when not in use.
Since they are located on the same plane, they do not get in the way when the original plate and the photosensitive material are polymerized and placed on the transparent plate 2, and the appearance is also good.

In the above explanation, when the airtight sheet 23 is expanded, the band iron 24 is secured to the front edge of the transparent plate 2.
A forward locking hook or the like may be provided for locking 4.

FIG. 6 shows a second embodiment of the present invention,
The same members as those in the previous embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, the band iron 24 and the engaging hook 26 are omitted, and the free end of the airtight sheet 23 is fixed to the upper surface of the stepped portion 5.

This embodiment also has the same functions and effects as the previous embodiment.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the first embodiment of the baking frame apparatus of the present invention before the start of operation, and FIG. 2 is the A of FIG. 1.
- Longitudinal cross-sectional view along line A, Figure 3 is B of Figure 2.
4 is a longitudinal sectional view taken along the line B, FIG. 4 is a vertical sectional side view of the essential parts of the baking frame apparatus of the first embodiment during operation, and FIG. 5 shows the state of the baking frame apparatus of the present invention during operation. FIG. 6 is a longitudinal sectional side view of the main part shown with the hook removed, and is a longitudinal sectional side view of the main part during operation of the second embodiment of the present invention. 1...Casing, 1a...Top plate, 1b...Side plate, 1
c...Partition plate, 2...Transparent plate, 3...Intake port, 4
...Light source, 5...Step, 6...Elongated hole, 7...Rail, 8a, 8b...Driver sprocket, 9...Drive sprocket, 10...Endless chain, 11...
... Chain support, 12 ... Traveling body, 13 ... Roller, 14 ... Small roller, 15 ... Lifting rod, 16 ...
...Pin, 17...Bearing fitting, 18...Connecting rod, 1
9...Vertical long hole, 20...Stretching roller, 21...
Fixed shaft, 22... Spring roller, 23... Airtight sheet, 24... Band iron, 25... Cover, 26
...Engagement hook.

Claims (1)

[Scope of Claims] 1. An airtight sheet is wrapped around a spring roller that is urged to rotate about its axis by an internal spring, and the free end of the airtight sheet is placed near the front edge of the transparent plate for exposure. By moving the spring roller toward the rear of the light-transmitting plate against the spring, the airtight sheet is stretched and superimposed on the light-transmitting plate to cover the original plate and the photosensitive material. In the baking frame apparatus, a stepped part is provided at the front upper part of the baking frame body, and the roller is supported on both left and right sides of the baking frame body, and vertically oriented lifting rods are used to move the roller back and forth. An endless chain whose lower end is passed around a sprocket provided on the baking frame body and driven by an appropriate power, whose upper side is almost parallel to the transparent plate and whose front side is perpendicular to the bottom of the step. As the endless chain runs, the roller is raised via the lifting rod and then moved toward the rear of the transparent plate, and the free end of the airtight sheet is . A baking frame device, characterized in that it is fixed to the stepped portion. 2. Wrap an airtight sheet around a spring roller that is urged to rotate about its axis by an internal spring, fix the free end of the airtight sheet near the front edge of the transparent plate for exposure, and In a printing frame device in which a spring roller is moved toward the rear of a light-transmitting plate, an airtight sheet is stretched and superposed on the light-transmitting plate to cover the original plate and photosensitive material. A stepped part is provided at the front upper part of the baking frame body, and the lower end of a vertically oriented lifting rod that supports the rollers on both left and right sides of the baking frame body and moves them back and forth is connected to the baking frame. It is hooked around a sprocket provided on the main body and driven by an appropriate power, and is attached to an endless chain whose upper side is almost parallel to the transparent plate and whose front side is perpendicular to the lower part of the step. As the endless chain runs, the roller is raised via a lifting rod and then moved toward the rear of the transparent plate, and is further provided with a squeezing roller that rolls on an airtight sheet together with a spring roller. 1. A baking frame apparatus characterized in that the ironing roller is provided to expel air between the airtight sheet and the transparent plate. 3. Wrap an airtight sheet around a spring roller that is urged to rotate about its axis by an internal spring, fix the free end of the airtight sheet near the front edge of the transparent plate for exposure, and In a printing frame device in which a spring roller is moved toward the rear of a light-transmitting plate, an airtight sheet is stretched and superposed on the light-transmitting plate to cover the original plate and photosensitive material. A stepped part is provided at the front upper part of the baking frame body, and the lower end of a vertically oriented lifting rod that supports the rollers on both left and right sides of the baking frame body and moves them back and forth is connected to the baking frame. It is hooked around a sprocket provided on the main body and driven by an appropriate power, and is attached to an endless chain whose upper side is almost parallel to the transparent plate and whose front side is perpendicular to the lower part of the step. , as the endless chain runs, the roller is raised via the lifting rod and then moved toward the rear of the transparent plate, and a laterally protruding band is formed on the lower surface of the free end of the airtight sheet. In addition to installing the iron, either make the transparent plate slightly protrude from the upper plate of the baking frame, or provide a locking piece on the front end of the upper plate that can lock the band iron, and attach the band iron to the upper end of the lifting rod. A baking frame device characterized by being provided with a forward engaging hook that can be engaged in a detachable manner. 4. Wrap an airtight sheet around a spring roller that is urged to rotate about its axis by an internal spring, fix the free end of the airtight sheet near the front edge of the transparent plate for exposure, and attach the airtight sheet to the spring roller. In a printing frame device in which a spring roller is moved toward the rear of a light-transmitting plate, an airtight sheet is stretched and superposed on the light-transmitting plate to cover the original plate and photosensitive material. A stepped part is provided at the front upper part of the baking frame body, and the lower end of a vertically oriented lifting rod that supports the rollers on both left and right sides of the baking frame body and moves them back and forth is connected to the baking frame. It is hooked around a sprocket provided on the main body and driven by an appropriate power, and is attached to an endless chain whose upper side is almost parallel to the transparent plate and whose front side is perpendicular to the lower part of the step. , as the endless chain runs, the roller is raised via the lifting rod and then moved toward the rear of the transparent plate, and a laterally protruding band is formed on the lower surface of the free end of the airtight sheet. In addition to installing the iron, either make the transparent plate slightly protrude from the upper plate of the baking frame, or provide a locking piece on the front end of the upper plate that can lock the band iron, and attach the band iron to the upper end of the lifting rod. A forward engaging hook that can be engaged in a detachable manner is provided, and a squeezing roller that rolls on the airtight sheet together with the spring roller is provided, and the core squeezing roller removes the air between the airtight sheet and the transparent plate. A baking frame device characterized in that it is designed to be expelled.