JP2004106155A - Separation type rotary cutter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separation type rotary cutter device wherein damage of an edge part and abrasion in a prescribed position of a blade are prevented when connecting a separate body frame to a body frame, and the reliability and the durability are improved. <P>SOLUTION: When the body frame and the separate frame are connected together, in the first place, a guide part 17c of the fixed blade 17 abuts on an edge in the opposite side of the edge part 18a of the movable blade 18. This constitution prevents the damage of the edge part 18a of the movable blade 18 caused by the direct abutment of the edge part 18a of the movable blade 18 on the fixed blade 17. This constitution also prevents the abrasion of the prescribed position of the fixed blade 17 by the edge part 18a of the movable blade 18 as a result of connecting the separate frame to the body frame for many times so as to improve the reliability and the durability. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a separation type rotary cutter device used for a receipt printer or the like provided in a POS (Point of Sales) terminal or the like, which is a product sales data processing device, and in which a fixed blade and a movable blade can be separated.
[0002]
[Prior art]
Generally, in a receipt printer, a facsimile machine, or the like that uses long paper such as a receipt paper, a paper cutting device for cutting the printed paper into an appropriate length is provided on the downstream side in the paper transport direction when viewed from the printing unit. There are many things. As an example of such a paper cutting device, a plate-shaped movable blade having a length covering the entire width of the paper is rotated with respect to the fixed blade and engaged with each other like scissors, so that between the blade portions. 2. Description of the Related Art There is a rotary cutter device configured to cut a cutting target object (for example, receipt paper). This rotary cutter device realizes reliable cutting of an object to be cut while having a simple structure.
[0003]
In recent years, a separation type rotary cutter device has been proposed in which a fixed blade and a movable blade can be separated in order to facilitate setting of a cutting object (for example, receipt paper or the like) and jam processing.
[0004]
[Problems to be solved by the invention]
By the way, in the separation type rotary cutter device in which the fixed blade and the movable blade can be separated, when the fixed blade and the movable blade are positioned from the separated position to the cutting position, the movable blade is provided with the member provided with the fixed blade. Thus, the fixed blade and the movable blade are partially brought into contact with each other.
[0005]
However, since the operation of connecting such a member provided with the fixed blade to the member provided with the movable blade is often performed by a person himself, depending on how the force is applied, the fixed blade and the movable blade may be connected. There is a problem that the blade portion of the fixed blade or the blade portion of the movable blade is damaged when the blade partially contacts. Also, as a result of repeatedly connecting the member provided with the fixed blade and the member provided with the movable blade, a predetermined position of the other blade is worn by the blade portion of one blade, and There is also a problem that the movable blade locks.
[0006]
The present invention provides a separation type rotary cutter device that can prevent damage to a blade portion and wear of a predetermined position of a blade when connecting a separate frame and a main body frame, and can improve reliability and durability. The purpose is to do.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is provided such that a fixed blade and a movable blade having an edge of one end surface of a flat plate as a blade portion are separable, and between the blade portion of the fixed blade and the blade portion of the movable blade. In a separation type rotary cutter device that cuts an object to be cut in a path of the formed cut object by movement of an engagement position of the blades with rotation of the movable blade, a main body frame that supports the movable blade; A separate frame that is provided detachably with respect to the main body frame and supports the fixed blade, and a guide portion that is provided so as to be continuously protruded from the blade portion at a position separated from the blade portion of the fixed blade, When the main frame and the separate frame are connected, the guide portion of the fixed blade first contacts the edge of the movable blade opposite to the blade portion.
[0008]
Therefore, when connecting the separate frame and the main body frame, it is possible to prevent the blade portion of the movable blade from directly abutting against the fixed blade, thereby preventing the blade portion of the movable blade from being damaged. As a result of performing the connection between the movable blade and the main body frame many times, it is possible to prevent wear of the fixed blade at a predetermined position by the blade portion of the movable blade.
[0009]
According to a second aspect of the present invention, a fixed blade and a movable blade having an edge of one end surface of a substantially flat plate as a blade portion are provided so as to be separable, and between the blade portion of the fixed blade and the blade portion of the movable blade. In the separation type rotary cutter device which cuts an object to be cut in the path of the object to be cut formed by the movement of the meshing position of the blades with the rotation of the movable blade, a main body frame supporting the movable blade And a separate frame detachably provided to the main body frame and supporting the fixed blade, and a guide portion continuously provided from the blade portion at a position off the blade portion of the fixed blade, and When the main body frame and the separate frame are connected, one end face where the blade portion of the movable blade is located and the surface of the guide portion of the fixed blade first contact.
[0010]
Therefore, when connecting the separate frame and the main body frame, it is possible to prevent the blade portion of the movable blade from directly abutting against the fixed blade, thereby preventing the blade portion of the movable blade from being damaged. As a result of performing the connection between the movable blade and the main body frame many times, it is possible to prevent wear of the fixed blade at a predetermined position by the blade portion of the movable blade.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. The separation type rotary cutter device according to the present embodiment is applied to a rotary cutter device of a receipt printer provided in a POS (Point of Sales) terminal or the like which is a product sales data processing device.
[0012]
Here, FIG. 1 is a vertical sectional side view schematically showing a receipt printer 1 of the present embodiment, and FIG. 2 is a vertical sectional side view showing a part of the receipt printer. As shown in FIG. 1, the receipt printer 1 includes a paper storage unit 2, a paper guide 3, a printing unit 4, a rotary cutter device 5, and the like. The paper storage unit 2 has a bottom formed in an arc shape, and stores and holds a long paper 7 wound in a roll shape. The paper guide 3 is provided between the paper storage unit 2 and the printing unit 4, and guides the paper 7 stored in the paper storage unit 2 to the printing unit 4. That is, in the receipt printer 1, a paper transport path 6 is formed starting from the paper storage unit 2 and passing through the printing unit 4 to the rotary cutter device 5.
[0013]
The printing unit 4 mainly includes a platen 8 that is driven to rotate by a motor (not shown) and a thermal head 9 that is a print head facing the platen 8. The thermal head 9 is attached to a flat plate-shaped head holding member 14. The head holding member 14 is rotatably provided around the fulcrum 15 in a direction approaching and separating from the platen 8. The head holding member 14 is provided between a hook member 39 described later and a coil spring 16 functioning as a compression spring. Is being urged towards. As a result, the thermal head 9 comes into contact with the platen 8. In the printing unit 4, printing is performed by the thermal head 9 on the paper 7 interposed between the platen 8 and the thermal head 9. The paper 7 is transported along the paper transport path 6 by rotating the platen 8 by the motor. Here, the printing unit 4 also functions as a transport unit that transports the paper 7.
[0014]
The rotary cutter device 5 provided on the downstream side of the printing unit 4 in the sheet conveying direction is configured by combining a fixed blade 17 and a movable blade 18 both formed in a substantially flat plate shape. Here, FIG. 3 is a perspective view schematically showing a configuration of the rotary cutter device 5. As shown in FIG. 3, the fixed blade 17 has an edge of one end surface of a substantially flat plate shape as a blade portion 17a. Such a fixed blade 17 is provided with a support shaft 17b at a short-side end located on a side opposite to the blade portion 17a, and is rotatably attached to a separate frame 25 described later. A spring 10 (see FIG. 1) is provided between the fixed blade 17 and the separate frame 25, and the fixed blade 17 is urged by the spring 10 toward the movable blade 18. Further, the fixed blade 17 is formed with a guide portion 17c for guiding the blade portion 18a of the movable blade 18 to a position where the blade portion 18a engages with the blade portion 17a of the fixed blade 17. More specifically, the guide portion 17c continuously protrudes from the blade portion 17a at a position off the blade portion 17a of the fixed blade 17. As shown in FIG. 1, such a fixed blade 17 is positioned at a substantially horizontal position when the fixed blade 17 and the movable blade 18 are engaged with each other.
[0015]
On the other hand, the movable blade 18 also has an edge of one end surface of a substantially flat plate shape as a blade portion 18a. Such a movable blade 18 is detachable from the movable blade holding portion 18c. The movable blade holding portion 18c is made of an elastic resin and is formed in a rod shape, and its axial direction is parallel to the axial direction of the platen 8. At both ends of the movable blade holding portion 18c, support shafts 18b rotatably supported by a main body frame 23 described later are formed, and one of the support shafts 18b is driven by a motor (not shown). The driving force transmitting mechanism 19 (see FIG. 5) for transmitting the driving force. The movable blade holding portion 18c has a plane portion (not shown) for supporting the movable blade 18 by forming the cross section between the two support shafts 18b into a substantially semicircular shape. Grooves 18d are formed at both ends and inside the two support shafts 18b so that both ends of the movable blade 18 can be slidably fitted. A positioning portion (not shown) for supporting and positioning the lower end of the movable blade 18 inserted in the groove 18d is formed at the bottom of the groove 18d.
[0016]
As shown in FIG. 4, the groove 18d of the movable blade holder 18c is formed such that the inserted movable blade 18 is slightly inclined from the axial direction of the movable blade holder 18c. Therefore, the blade portion 17a of the fixed blade 17 and the blade portion 18a of the movable blade 18 are positioned with a slight inclination from the parallel position, and as shown in FIG. A V-shaped cutting object path A is formed between the movable blade 18 and the blade portion 18a of the movable blade 18. The cutting target object path A is a part of the sheet conveying path 6. As shown in FIG. 1, such a movable blade 18 is positioned at a substantially vertical position when the fixed blade 17 and the movable blade 18 are engaged with each other.
[0017]
Here, the driving force transmission mechanism 19 will be briefly described with reference to FIG. The driving force transmission mechanism 19 is connected to a support shaft 18b of the movable blade 18 and is pivotally supported by the support shaft 18b as a fulcrum. The cutter arm 20 is attached to a main body frame 23 and connected to a motor. And a drive crank 22 that is rotatably attached to the main body frame 23 and is connected to the gear train 21 and forms a cam mechanism together with the cutter arm 20. At the initial position, the cutter arm 20 has an elongated hole 20a that is long in the vertical direction. The eccentric pin 22a of the drive crank 22 is engaged with the elongated hole 20a of the cutter arm 20. That is, the eccentric pin 22a of the drive crank 22 moves inside the elongated hole 20a of the cutter arm 20 with the rotation of the drive crank 22 by the driving force from the motor transmitted from the gear train 21. When the eccentric pin 22a of the drive crank 22 moves inside the elongated hole 20a of the cutter arm 20, the cutter arm 20 swings about the support shaft 18b of the movable blade 18 as a fulcrum.
[0018]
By swinging the cutter arm 20 in this manner, the movable blade 18 rotates around the support shaft 18b. Then, the movable blade 18 presses the guide portion 17c of the fixed blade 17 with its rotation. At this time, the fixed blade 17 has a reaction force in a direction opposite to the rotation direction due to the returning force of the spring 10 connecting the fixed blade 17 and the separate frame 25. That is, since the fixed blade 17 and the movable blade 18 are positioned with a slight inclination from the parallel position, the V-shaped cutting object path is formed by the rotation of the movable blade 18 and the reaction force of the fixed blade 17. As A gradually moves and becomes smaller, the respective blade portions 17a and 18a mesh like scissors. That is, the rotary cutter device 5 cuts the sheet 7 to be cut, which is conveyed along the sheet conveying path 6, by engaging the blade portion 17 a of the fixed blade 17 with the blade portion 18 a of the movable blade 18.
[0019]
As shown in FIGS. 1 and 2, the above-described paper storage unit 2, paper guide 3, thermal head 9, movable blade 18, and the like are provided on the main body frame 23 of the receipt printer 1. A lower unit 24, which is one first unit, is configured. On the other hand, the platen 8 and the fixed blade 17 are provided on a U-shaped separate frame 25 provided independently of the main body frame 23, and the upper unit, which is the second unit of the receipt printer 1, is provided by these. 26 are configured. The motor for driving the movable blade 18 and the driving force transmission mechanism 19 and the motor for driving the platen 8 are attached to the main body frame 23. The upper unit 26 is independent of the lower unit 24, and is detachable from the lower unit 24.
[0020]
Here, FIG. 6 is a perspective view schematically showing the fixed blade 17 attached to the separate frame 25. As described above, the fixed blade 17 is attached to the separate frame 25 via the support shaft 17b. As shown in FIG. 6, a support portion 25 a for supporting the fixed blade 17 is formed on the separate frame 25. Here, the fixed blade 17 is supported by the support portion 25a at a position where the guide portion 17c for guiding the movable blade 18 located on the blade portion 17a side is inclined downward from the horizontal position. The reason why the standby position of the fixed blade 17 is set to the position where the guide portion 17c is inclined lower than the horizontal position will be described later in detail, but when the upper unit 26 is connected to the lower unit 24, This is to prevent the fixed blade 17 from directly hitting the blade portion 18a of the movable blade 18.
[0021]
The lower unit 24 and the upper unit 26 as described above are connected by a connecting mechanism 27 as connecting means. As shown in FIGS. 1 and 2, the connecting mechanism 27 includes a connecting shaft 28 and a platen 8 attached to a separate frame 25 of the upper unit 26 and a connecting shaft 28 formed on the main body frame 23 of the lower unit 24. It comprises a groove 29 as a first support part that can be fitted and a U-shaped groove 30 as a second support part formed in the main body frame 23 of the lower unit 24 and capable of fitting both ends of the platen 8. Have been. The upper unit 26 is positioned with respect to the lower unit 24 by fitting the connection shaft 28 and the platen 8 into the grooves 29 and 30, and the upper unit 26 and the lower unit 24 are connected. In this state, the rotation of the upper unit 26 with respect to the lower unit 24 is restricted. Here, the platen 8 also functions as a connection shaft. In this connection state, the platen 8 and the thermal head 9 face each other, and the movable blade 18 and the fixed blade 17 are positioned at positions where the paper 7 can be cut.
[0022]
As shown in FIG. 7, the lower unit 24 is provided with a hook member 39 having two hook portions 38 formed on the two support shafts 8 a of the platen 8 fitted in the grooves 30 so as to be detachable. ing. The hook member 39 includes a hook portion 38 and a flat plate portion 40 formed integrally with the hook portion 38. The hook member 39 is rotatable about the fulcrum 15 in a direction in which the hook portion 38 is engaged with and disengaged from the two support shafts 8 a of the platen 8. The hook member 39 is urged by a coil spring 16 provided between the hook member 39 and the head holding member 14 in a direction in which the two support shafts 8a of the platen 8 are engaged (the direction of the arrow a in FIG. 7). The hook portion 38 is formed with an inclined portion 38a for contacting the support shafts 8a of the platen 8 and releasing the interference by the rotation of the hook member 39 when the upper unit 26 is connected to the lower unit 24. ing. When the upper unit 26 is connected to the lower unit 24, the interference of the hook member 39 with the two support shafts 8 a of the platen 8 is lost by the rotation of the hook member 39 against the urging force of the coil spring 16. Finally, the hooks 38 are engaged with the two support shafts 11 of the platen 8, and the upward movement of the upper unit 26 relative to the lower unit 24 is locked. Here, when the upper unit 26 is not connected to the lower unit 24, the hook member 39 and the head holding member 14 urged by the coil spring 16 are positioned on the positioning surfaces 41 and 42 formed on the main body frame 23. They are positioned in contact with each other.
[0023]
In such a configuration, in order to set the paper 7 in the receipt printer 1, the hook member 39 is rotated in the release direction (the direction indicated by the arrow b in FIG. 7) to release the lock of the platen 8 by the hook member 39. Then, the connection of the connecting mechanism 27 is released by moving the upper unit 26 upward, and the upper unit 26 is removed from the lower unit 24. In this state, the paper 7 is stored in the paper storage unit 2, the paper 7 is pulled out downstream of the movable blade 18 in the paper conveyance direction, and the connection shaft 28 and the platen 8 of the upper unit 26 are fitted into the grooves 29 and 30, respectively. The upper unit 26 is moved toward the lower unit 24 so that the upper unit 26 and the lower unit 24 are connected. At this time, the platen 8 is locked by the hook member 39. By connecting the upper unit 26 and the lower unit 24 in this way, the paper 7 is moved between the connection shaft 28 and the paper guide 3, between the thermal head 9 and the platen 8, and between the fixed blade 17 and the movable blade. It is in a state of being passed between the blade 18. As described above, in the present embodiment, since the upper unit 26 is provided independently of the lower unit 24 so as to be freely connected to and disconnected from the lower unit 24, the paper 7 can be easily set on the receipt printer 1. it can.
[0024]
When the upper unit 26 and the lower unit 24 are connected, the fixed blade 17 and the movable blade 18 constituting the rotary cutter device 5 come into contact with each other. In the present embodiment, the standby position of the fixed blade 17 is set at a position where the guide portion 17c is inclined downward from the horizontal position. Therefore, when the upper unit 26 and the lower unit 24 are connected, FIG. As shown in the figure, the movable blade 18 provided with the blade portion 17a of the fixed blade 17 on the same plane and the surface 17d of the guide portion 17c positioned on the movable blade 18 side is provided in the lower unit 24 at a substantially vertical position. After first contacting the edge opposite to the blade portion 18a (see FIG. 8A), one end face 18e on which the surface 17d of the guide portion 17c of the fixed blade 17 and the blade portion 18a of the movable blade 18 are located. Are in contact with each other (see FIG. 8B).
[0025]
As described above, in the present embodiment, the standby position of the fixed blade 17 in the upper unit 26 is set at the blade portion 17a side of the fixed blade 17 so that the guide portion 17c for guiding the movable blade 18 is located below the horizontal position. When the upper unit 26 and the lower unit 24 are connected to each other by the inclined position, the guide portion 17c is positioned horizontally with respect to the movable blade 18 provided in the lower unit 24 at a substantially vertical position. Since the fixed blade 17 contacts from above at a position inclined downward, the edge of the movable blade 18 on the side opposite to the blade portion 18a first comes into contact with the surface 17d of the guide portion 17c of the fixed blade 17. become.
[0026]
Therefore, when connecting the upper unit 26 and the lower unit 24, it is possible to prevent the blade 18a of the movable blade 18 from being damaged due to the direct contact of the blade 18a of the movable blade 18 with the fixed blade 17. Further, as a result of connecting the upper unit 26 and the lower unit 24 many times, it is possible to prevent the fixed blade 17 from being worn at a predetermined position by the blade portion 18a of the movable blade 18, thereby improving reliability and durability. Improvement can be achieved.
[0027]
Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted. This embodiment is different from the first embodiment in the state of attachment of the fixed blade 17 to the separate frame 25.
[0028]
Here, FIG. 9 is a side view schematically showing the fixed blade 17 attached to the separate frame 25. The fixed blade 17 is attached to a separate frame 25 via a support shaft 17b. Further, as shown in FIG. 9, a support portion 25 a for supporting the fixed blade 17 is formed on the separate frame 25. Here, the fixed blade 17 is supported by the support portion 25a at a substantially horizontal position.
[0029]
In such a configuration, when the upper unit 26 and the lower unit 24 are connected, the fixed blade 17 and the movable blade 18 constituting the rotary cutter device 5 come into contact with each other. In the present embodiment, since the standby position of the fixed blade 17 is set to a substantially horizontal position, when connecting the upper unit 26 and the lower unit 24, as shown in FIG. The surface 17d of the guide portion 17c positioned on the movable blade 18 side with the portion 17a on the same plane and the one end surface 18e where the blade portion 18a of the movable blade 18 is located first come into contact.
[0030]
As described above, in the present embodiment, the standby position of the fixed blade 17 in the lower unit 24 is set to the position where the guide portion 17c that guides the movable blade 18 at the blade portion 17a side of the fixed blade 17 becomes substantially horizontal. When the upper unit 26 and the lower unit 24 are connected to each other, the guide portion 17c of the fixed blade 17 in the substantially horizontal position is located above the movable blade 18 provided in the lower unit 24 at a substantially vertical position. , The first end face 18e where the blade portion 18a of the movable blade 18 is located and the surface 17d of the guide portion 17c of the fixed blade 17 first contact.
[0031]
Therefore, when connecting the upper unit 26 and the lower unit 24, it is possible to prevent the blade 18a of the movable blade 18 from being damaged due to the direct contact of the blade 18a of the movable blade 18 with the fixed blade 17. Further, as a result of connecting the upper unit 26 and the lower unit 24 many times, it is possible to prevent the fixed blade 17 from being worn at a predetermined position by the blade portion 18a of the movable blade 18, thereby improving reliability and durability. Improvement can be achieved.
[0032]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, breakage of the blade part at the time of connecting a separate frame and a main body frame and wear of the predetermined position of a blade can be prevented, and improvement in reliability and durability can be aimed at.
[Brief description of the drawings]
FIG. 1 is a vertical sectional side view schematically showing a receipt printer according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional side view showing a part thereof separated.
FIG. 3 is a perspective view schematically showing a configuration of a rotary cutter device.
FIG. 4 is a plan view schematically showing a movable blade of the rotary cutter device.
FIG. 5 is a side view schematically showing a configuration of a driving force transmission mechanism.
FIG. 6 is a perspective view schematically showing a fixed blade attached to a separate frame.
FIG. 7 is a vertical sectional side view showing a mounting structure of a thermal head and a hook member.
FIG. 8 is an explanatory diagram showing a contact state between a fixed blade and a movable blade when connecting the upper unit and the lower unit.
FIG. 9 is a side view schematically showing a fixed blade attached to a separate frame according to the second embodiment of the present invention.
FIG. 10 is an explanatory diagram showing a contact state between a fixed blade and a movable blade when connecting the upper unit and the lower unit.
[Explanation of symbols]
5: Separable rotary cutter device, 7: Cutting object, 17: Fixed blade, 17a: Blade portion of fixed blade, 17c: Guide portion, 18: Movable blade, 18a: Blade portion of movable blade, 23: Body frame, 25: Separate frame, A: Cut object path

Claims (2)

A fixed blade and a movable blade having an edge of one end surface of a substantially flat plate as a blade portion are provided so as to be separable, and a cutting target object path formed between the blade portion of the fixed blade and the blade portion of the movable blade. In the separation type rotary cutter device that cuts an object to be cut by moving a meshing position of the blade portions with each other with rotation of the movable blade,
A main body frame supporting the movable blade,
A separate frame that is detachably provided to the main body frame and supports the fixed blade,
A guide portion provided continuously and protruding from the blade portion at a position off the blade portion of the fixed blade,
Has,
Wherein the guide portion of the fixed blade first contacts the edge of the movable blade opposite to the blade portion when the main body frame is connected to the separate frame. apparatus. A fixed blade and a movable blade having an edge of one end surface of a substantially flat plate as a blade portion are provided so as to be separable, and a cutting target object path formed between the blade portion of the fixed blade and the blade portion of the movable blade. In the separation type rotary cutter device that cuts an object to be cut by moving a meshing position of the blade portions with each other with rotation of the movable blade,
A main body frame supporting the movable blade,
A separate frame that is detachably provided to the main body frame and supports the fixed blade,
A guide portion provided continuously and protruding from the blade portion at a position off the blade portion of the fixed blade,
Has,
When the main frame and the separate frame are connected, one end surface of the movable blade where the blade portion is located and the surface of the guide portion of the fixed blade first contact each other. Type rotary cutter device.

Images