JPH07251599A - Sheet floating prevention mechanism - Google Patents

Abstract

PURPOSE:To guarantee good cutting by disposing an engaging section on the upper side and an energizing plate disposed on the lower side of a supporting axis in a carriage movably up and down and rotatably in a sheet floating prevention mechanism used for a cutting plotter or the like for cutting a sheet or the like into an optional shape. CONSTITUTION:A carriage assembly 16 moving freely along guide rails in the horizontal direction is provided with a sheet floating prevention mechanism including an energizing body 15, a tool holder 14 holding a tool 13 and moving up and down and the like. The energizing plate 6 for bringing a sheet 17 into contact with the lower end of the supporting axis 7 as a center from above is provided on the energizing body 15, and the energizing plate 6 is energized downwardly by the energizing force of a spring 8. An operation plate 9 for operating the energizing plate 6 is disposed on the upper end face of the supporting axis 7. The energizing plate 6 is a thin plate with an almost U-shaped upper face, and its front side and rear side are formed on inclined sections 6a and 6b with the front side and rear side heading for upward gradually and a central section between the front and the rear is formed into a plane horizontal section 6c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet floating prevention mechanism used for a cutting plotter or the like for cutting a sheet or the like into an arbitrary shape.

[0002]

2. Description of the Related Art Conventionally, among cutting plotters, there is a sheet move type as shown in FIG. 6, in which a pinch roll 3 is provided at both upper ends of a drive roll 2 provided on a cutting bed 1. Sheets 17 that are placed opposite to each other and placed on the cutting bed 1 are sandwiched between the drive roll 2 and the pinch roll 3. Then, by rotating the drive roll 2 in this state, the sheet can be moved on the cutting bed 1.

A carriage 5 holding a cutting tool (blade) 13 in a vertically movable state is engaged with a guide rail 18 arranged above the drive roll 2. The seat 17 can be moved along the guide rail 18 in a direction orthogonal to the moving direction of the seat 17. That is, the cutting plotter cuts the sheet 17 into a figure of an arbitrary shape by moving the sheet 17 and the carriage 5 as described above in a state where the tool 13 held by the carriage 5 is lowered. You can do it.

At this time, the sheet 17 to be cut
Are sucked by air by a plurality of suction holes 4 provided on the cutting bed 1 to prevent the sheet 17 from floating when it moves. The sheet floating prevention means applies a negative pressure of air to the suction holes 4 by rotating the suction fan provided inside the cutting bed 1 to prevent the sheet 1 from moving.
7 can be adsorbed.

[0005]

However, in the above-mentioned sheet floating preventing means, the characteristics of the sheet are different depending on the type, such as a relatively hard sheet or a sheet having a strong floating tendency. Often cannot be prevented. Therefore, this causes the following adverse effects. That is, when the sheet floats, the tool 13 attached to the carriage 5 comes into contact with a part of the sheet 17 even when the tool 13 is in a raised state, and the carriage 5 moves in this state to damage the sheet 17. I put it on,
This causes a problem of changing the direction of the cutting edge of the tool 13. Further, when the tool is lowered in that state, the sheet 17 is pierced and proper cutting cannot be performed, which causes troubles such as tool pressure failure and jamming of the sheet 17.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a sheet floating prevention mechanism capable of preventing the sheet from floating regardless of the type or state of the sheet.

[0007]

In order to achieve the above object, the present invention relates to a sheet in a cutting plotter for cutting the sheet into a desired shape by relatively moving the carriage to which the blade is attached and the sheet. In the floating prevention mechanism, a support shaft is attached to the carriage in a state of being vertically movable and rotatable about an axis, and when the support shaft faces one side in the circumferential direction on the upper end side of the support shaft. The support shaft is located at the lower side, and when facing the other side, there is provided a locking portion that engages with the engaging portion of the carriage to position the support shaft at the upper side, and presses the sheet against the lower end of the support shaft. When the support shaft faces one side, the bias plate is positioned near the tip of the blade portion, and when the support shaft faces the other. A configuration that was to be located and upwardly away from the cutting unit.

[0008]

That is, in the seat floating prevention mechanism according to the present invention, the engaging portion arranged on the upper side of the support shaft and the biasing plate arranged on the lower side can be vertically moved and rotated in the carriage. It is arranged in such a state. Then, when the support shaft is oriented in one direction, the support shaft and the urging plate are located below, and the urging plate is located near the tip of the blade portion. Therefore, the sheet located near the tip of the blade is pressed downward by the urging plate and prevented from floating. As a result, good cutting can be performed. Also, when it is not necessary to press the sheet with the urging plate, such as when cutting a sheet that does not float,
The urging plate is separated from the blade portion with the support shaft facing the other side, and the locking portion is engaged with the engaging portion of the carriage to position the support shaft and the urging plate upward. As a result, it is possible to prevent the urging plate from coming into contact with the seat.

As described above, the sheet floating prevention mechanism according to the present invention does not apply negative pressure of air to the entire area of the sheet on the cutting bed to suck the sheet, unlike the conventional sheet floating prevention means, but the sheet cutting point. The sheet is prevented from floating regardless of the type and characteristics of the sheet because the cutting is performed while pressing it from above, and when the sheet floating prevention mechanism is not needed, the biasing plate can be operated by operating the locking part. Can be saved. Further, by biasing the biasing plate downward by the spring body, it is possible to more reliably prevent the sheet from floating. Next, the sheet floating prevention mechanism according to the present invention will be described in detail based on embodiments.

[0010]

1 shows an embodiment of the present invention.
In the figure, 16 is a carriage assembly having a sheet floating prevention mechanism.

In this figure, the carriage assembly 16
Is a biasing member 15 for preventing the sheet from floating, a tool holder 14 for holding the tool 13, a drive unit (not shown) for vertically moving the tool holder 14, and a carriage assembly. Body 16 to guide rail 18
A guide rail engaging portion (not shown) for moving along (see FIG. 2), and a frame body 1 as a base of each of these elements.
It is composed of 1.

The frame body 11 is provided with a tool holder 14 at its front end portion 11a in a vertically movable state. When the tool holder 14 holds the tool 13, it is vertically moved. 13 and sheet 1
7 can be touched or released. Further, an insertion hole 12 (see FIGS. 3 and 4) is formed on the front side of the frame 11 from the upper surface to the lower surface, and a fitting hole 10 is provided on the rear side.

The urging member 15 is for preventing the seat 17 from floating, and the urging plate 6 for pressing the seat 17 from above is provided at the lower end of the support shaft 7 at the center thereof. And an operation plate 9 for operating the urging plate 6 is provided on the upper end side.

To explain these in more detail, the urging plate 6 of the urging body 15 is a thin plate having a substantially U-shape in a top view, and its front and rear sides are inclined portions 6a and 6b which gradually rise upward.
The horizontal part 6c formed in the
Is formed in. The inclined portions 6a and 6b are formed to facilitate the movement of the urging plate 6 on the seat 17 even if there is a step between the cutting bed 1 and the seat 17 or if the seat floats. The lower end of the support shaft 7 is connected to the upper surface of the rear end of the inclined portion 6b. 8
Is a spring body that freely penetrates the outer periphery of the support shaft 7 in a state where both ends thereof are in contact with the lower surface of the frame body 11 and the upper surface of the inclined portion 6b of the biasing plate 6. The urging plate 6 is always urged downward by the elasticity of the spring body 8, and the urging force presses the seat 17 downward. Therefore, the bias plate 6 is
When the tool 13 is cutting, the tool 13
It is possible to prevent the sheet from floating by pressing the sheet 17 around the sheet from above.

The operation plate 9 is formed of a disc-shaped body, and its center portion is connected to the upper end of the support shaft 7, and one end portion thereof is a locking rod 9a capable of engaging with the fitting hole 10 of the frame body 11. Is installed vertically. The length of the locking rod 9a is set longer than the depth of the fitting hole 10. Therefore, by lifting the operation plate 9 upwards against the elasticity of the spring body 8 and rotating it half way, the locking rod 9a can be engaged with the fitting hole 10, and at that time, the urging body 15 as a whole. Will be located above. Further, in this case, the urging body 6 also makes a half rotation together with the operation plate 9 via the support shaft 7, and comes to be positioned on the lower surface of the frame body 11 apart from the tool holder 14.

The carriage assembly 16 is slidably engaged with a guide rail 18 arranged in the plotter, and is used in a state shown in FIGS. 1 and 3 in use. . That is, by operating the operation plate 9 provided on the upper part of the urging body 15, the locking rod 9a is brought into contact with the front end portion 11a of the frame body 11, and the urging plate 6 is attached to the cutting bed 1. It is in a state of energizing. In this case, the urging plate 6 is in a state in which the horizontal portion 6c is brought into pressure contact with the cutting bed 1 by the elasticity of the spring body 8 loosely penetrated by the support shaft 7. Further, the operation plate 9 is biased toward the upper surface side of the frame body 11 by the elasticity of the spring body 8, and
The front end portion 11a of the frame body 11 and the locking portion 9a are in contact with each other so that the frame body 11 cannot rotate. As a result, the urging body 15 maintains its state unless the operating plate 9 is operated.

In this state, the sheet 17 can be placed on the cutting bed 1 by a predetermined method, and the cutting operation can be performed according to a predetermined procedure. In this case, the urging plate 6 pressing the cutting bed 1 moves along with the carriage assembly 16 along the guide rail 18 to prevent the sheet from floating during cutting. Therefore, the sheet 17 as described in the conventional example
Therefore, various problems such as scratching the tool and changing the direction of the cutting edge of the tool 13 do not occur, and good cutting can be performed.

Usually, the cutting work is performed in the above-mentioned state, but when the urging body 15 is not required,
By operating the operation plate 9, the biasing body 15 can be retracted from the tool 13 as shown in FIG. That is, the operating plate 9 is lifted up from the state shown in FIG. 3 so that the locking rod 9a does not come into contact with the front end portion 11a of the frame body 11, and the operating plate 9 is rotated a half turn to lock the locking rod 9a. And a fitting hole 10 provided on the upper surface of the frame body 11
Position the locking rod 9a at a position where it can be fitted with the operation plate 9
Is lowered and the fitting hole 10 and the locking rod 9a are fitted together. As a result, the urging plate 6 is lifted upward against the elasticity of the spring body 8 and locked in the state where the direction is reversed. Then, in a state where the biasing body 15 is retracted, the cutting work can be performed according to the above-described predetermined procedure.

FIG. 5 shows another embodiment according to the present invention. In this embodiment, the biasing plate 19 is the tool 13
Is formed in a notched hole 19a in a portion corresponding to, and is formed in a substantially ring shape, and the edge portion on the lower side of the outer periphery is formed into a curved surface with corners. The configuration of the other parts is similar to that of the above-mentioned embodiment. Therefore, the same reference numerals are given to the same portions. With such a configuration, the sheet 17 can be pressed in an appropriate state regardless of the movement of the carriage assembly 16 with respect to the sheet 17. Other functions and effects are similar to those of the above embodiment. As the urging body 15, any other material can be used as long as it can press the sheet 17 and does not hinder the cutting work.

As described above, according to the sheet floating prevention mechanism, the sheet 17 around the cutting tool 13 is cut.
Since the urging plate 6 constantly urges the
It is possible to prevent the sheet from floating regardless of the type of the sheet. Further, when the seat floating prevention mechanism is not required, the biasing plate 6 can be retracted to a position away from the tool 13, and the seat 17 that does not require the seat floating prevention mechanism can be dealt with. In addition to the above-mentioned cutting plotter, the sheet floating prevention mechanism according to the present invention is provided with a cutting plotter having a drawing function by holding a pen or the like on the cutting plotter, or a pen plotter performing drawing on the contrary. It is also an effective mechanism for pen plotters and the like. Further, it can be used not only for a sheet move type plotter or the like, but also for a plotter or the like for cutting or drawing while the sheet is fixed.

[0021]

As described above, since the seat floating prevention mechanism according to the present invention is constructed, the seat floating prevention mechanism can be used regardless of the type of the sheet and the seat floating prevention mechanism can be used as necessary. And has the advantage that it can be saved in a position away from the tool.
As a result, various problems caused by the floating of the sheet are solved, and the practical effect is great.

[Brief description of drawings]

FIG. 1 is a perspective view of a seat floating prevention mechanism according to an embodiment of the present invention.

FIG. 2 is a perspective view of a sheet move type cutting plotter having a seat floating prevention mechanism.

FIG. 3 is an explanatory diagram showing a state in which a seat is biased.

FIG. 4 is an explanatory diagram showing a state in which a seat is not biased (a retracted state).

FIG. 5 is a perspective view of a seat floating prevention mechanism according to an embodiment of the present invention.

FIG. 6 is a perspective view of a sheet move type cutting plotter provided with a sheet floating prevention unit in a conventional example.

[Explanation of symbols]

 6 Energizing Plates 6a, 6b Inclined Part 7 Spindle 8 Spring Body 9 Operation Plate 9a Locking Rod 10 Fitting Hole 11 Frame Body 13 Tool (Cutting Tool) 14 Tool Holder 15 Energizing Body 16 Carriage Assembly Body

Claims (4)

[Claims] 1. A sheet floating prevention mechanism in a cutting plotter for cutting a sheet into a desired shape by moving a carriage to which a blade portion is attached and a sheet relative to each other, which is vertically movable to the carriage. Also, a support shaft is attached so as to be rotatable about the shaft, and the support shaft is located at the upper end side of the support shaft when the support shaft faces one side in the circumferential direction, and when the support shaft faces the other side. An engaging portion for engaging the engaging portion of the carriage to position the support shaft upward is provided, and a biasing plate for pressing the sheet is attached to the lower end of the support shaft. When the support shaft faces one side, it is located in the vicinity of the tip of the blade portion, and when the support shaft faces the other side, it is positioned apart from and above the blade portion. Seat lift prevention mechanism characterized by 2. The urging plate has a substantially U-shape in a top view, and both end portions and curved portion side portions of the U-shaped branch are formed in an upward slope and the curved portion side is supported. 2. The seat floating prevention mechanism according to claim 1, wherein the seat float prevention mechanism is connected to a shaft, and when the support shaft faces one side, the tip of the blade portion is located in the U-shaped central space. 3. The urging plate has a ring-like shape when viewed from the top, the outer peripheral edge portion thereof is formed to be upwardly inclined, and when the support shaft faces one side, the tip of the blade portion is a ring-shaped central space. The seat floating prevention mechanism according to claim 1, wherein the seat floating prevention mechanism is located at the position. 4. The seat floating prevention mechanism according to claim 1, 2 or 3, wherein the biasing plate is biased downward by a spring body.