JPH04315594A - Feed device - Google Patents

Abstract

PURPOSE:To reduce the number of parts of a feed device to move a carriage in a straight line, more simplify the construction, and lower the manufacturing cost. CONSTITUTION:By rotating a coil member 16 with a motor 14, a carriage 10 engaged with the coil member 16 through an engaging boss is moved along a guide frame 58. The pitch of the coil member 16 is large, the ratio of mean coil diameter D to wire diameter d is small, and bending deformation is hardly generated because the coil member 16 is fitted into a circular groove 70 and rotated in the circular groove 70.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeding device.

0002

2. Description of the Related Art Conventionally, a feeding device is used, for example, in a sheet cutter device to move a carriage equipped with a cutter. The sheet cutter device described in JP-A-2-131895 includes (a) a carriage that rotatably supports the cutter, and (b) the carriage that is movable in a direction substantially perpendicular to the center line of the cutter. a supporting guide member; (c) a toothed pulley having teeth on its outer circumferential surface, at least one toothed pulley disposed at a position spaced apart in the longitudinal direction of the guide member, and at least one toothed pulley being rotationally driven by a drive device; ) with teeth that engage with the teeth of those toothed pulleys,
A feeding device is used that includes a toothed belt wound around a toothed pulley and (e) means for preventing the teeth of the toothed belt and the toothed pulley from meshing and disengaging.

0003

SUMMARY OF THE INVENTION This feeding device requires many parts, has a complicated structure, and has the drawbacks of high manufacturing costs. The present invention has been made with the object of providing a feeding device that has a smaller number of parts, a simpler structure, and a lower manufacturing cost.

0004

[Means for Solving the Problems] The gist of the present invention is to provide a feeding device including a coil member, a drive device that rotates the coil member around its longitudinal center line, and a drive device that allows the coil member to rotate. a coil member supporting member that supports the coil member from the outer peripheral side while supporting the coil member, a carriage having an engaging portion that engages with the coil member in a manner immovable relative to the coil member in the longitudinal direction of the coil member and allows rotation of the coil member, and the carriage. and a carriage guide that supports the coil member so as to be linearly movable in a direction parallel to the longitudinal direction of the coil member.

[0005]

In the feeding device of the present invention, the carriage is moved along the carriage guide by the driving device rotating the coil member about its longitudinal center line. The moving direction of the carriage is determined by the winding direction and rotating direction of the coil member. For example, when the drive device rotates a coil member whose winding direction is on the right clockwise when viewed from the drive device side, the carriage is moved toward the drive device side along the carriage guide. The moving speed of the carriage is determined by the rotational speed of the drive device and the pitch of the coil members.

It is also conceivable to insert a rod inside the coil member support member to support the coil member from the inner peripheral side. However, in this case, in order to prevent the coil member from curving, the rod itself must have high bending rigidity, which increases the diameter of the rod and, by extension, the winding diameter of the coil member. As the winding diameter of the coil member increases, the torsional rigidity decreases, so the linear shape of the coil member must be increased. In addition, since the rod is disposed on the inner circumferential side of the coil member, the engaging portion of the carriage cannot be deeply engaged with the coil member, and the engagement becomes easily disengaged.To prevent this, However, the wire diameter of the coil member must be increased, resulting in a large and heavy product. On the other hand, when the coil member is supported from the outer peripheral side by the coil member supporting member, there is no need to insert a rod into the inner peripheral surface, so the winding diameter of the coil member can be reduced, and torsional rigidity can be ensured. It is possible to reduce the wire diameter at the same time. Also, since there is no rod on the inner circumference,
The engaging portion of the carriage can be deeply engaged with the coil member, and even if the wire diameter of the coil member is reduced, there is no fear that the engaging portion of the carriage will be disengaged from the engaging portion of the carriage.

[0007]

[Effects of the Invention] According to the present invention, parts such as a plurality of toothed pulleys, a toothed belt, and a means for preventing engagement and disengagement can be removed from a conventional feeding device, and a feeding device with a simple structure and low cost can be obtained. can be manufactured. Furthermore, by changing the pitch of the coil members, the moving speed of the carriage can be easily changed. Furthermore, by having the coil member supporting member support the coil member from the outer peripheral side,
The carriage can be stably fed by a small coil member with increased bending rigidity and torsional rigidity, and a small winding diameter and wire diameter.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which a feeding device is applied to a sheet cutter device as an embodiment of the present invention will be described below in detail with reference to the drawings. In the sheet cutter device shown in FIGS. 1 to 3, 10 is a carriage, 12 is a frame, 14 is a motor serving as a driving device, and 16 is a coil member. Carriage 10
is a bottomless box-shaped member, which includes a circular blade 22, a sleeve 24, a rubber roller 26, a spring 28, and a shaft 30.
, supports the washer 32, and is slidably fitted to the frame 12.

A cutting edge 34 is formed on the periphery of the circular blade 22,
A hole 36 is formed in the center. The sleeve 24 has a large diameter part and a small diameter part, and the large diameter part has a rubber roller 26.
is fitted into the small diameter portion, and the circular blade 22 is fitted into the hole 36 and caulked. Further, a shaft 30 is press-fitted into the sleeve 24, and the rubber roller 26, sleeve 24, circular blade 22, and shaft 30 are integrated. axis 30
One end is inserted into a hole 38 formed in the front wall of the carriage 10, and the other end is inserted into an elongated hole 40 formed in the rear wall. The elongated hole 40 extends horizontally and allows the shaft 30 to rotate by a small angle in a horizontal plane about the portion fitted in the hole 38 .

The front wall of the carriage 10 of the shaft 30 and the circular blade 2
A spring 28 and a washer 32 are fitted in the portion between the two. The spring 28 has the circular blade 22 as the fixed blade 4.
2 and prevents the shaft 30 from coming out of the elongated hole 40 of the carriage 10. Further, a gap is formed between the sleeve 24 and the rear wall of the carriage 10, so that the sleeve 24 does not get in the way when the shaft 30 moves within the elongated hole 40.

Further, both side walls of the carriage 10 have a stepped shape in which the heights are different between the rear half and the front half, and the stepped portions are used as shoulders 44. Dogs 48 and 49 are respectively projected from the lower end of the front half of the side wall at right angles to the side wall.
The left moving end and the right moving end of the carriage 10 are detected by acting on the detection end portions 53 and 54 of the carriage 10, respectively. Further, two bosses 56 are protruded from the outer surface of the rear wall as shown in FIG. It has become.

The frame 12 has a longitudinal shape extending along the longitudinal direction of the coil member 16, and includes a guide frame 58. Both ends of the lower surface of the guide frame 58 in the longitudinal direction are connected to the spacer 60 and the fixed blade 4, respectively.
2, and a space is formed between the guide frame 58 and the fixed blade 42, into which the sheet is fed. The left sensor 51 and the right sensor 5 are installed at the left end and right end of the mounting frame 62, respectively.
2 is fixed. Further, a side frame 64 is attached to one end of the guide frame 58, and a motor attachment frame 66 and the motor 14 are attached to the other end. The fixed blade 42, guide frame 58, mounting frame 62, side frame 64, motor mounting frame 66, etc. constitute the frame 12.

The guide frame 58 is a member in which a circular groove 70 serving as a coil member supporting member is formed at the bottom of a rectangular groove 68 serving as a carriage guide. The rear half of the carriage 10 is fitted into the square groove 68, and the carriage 10 is prevented from separating from the square groove 68 by engagement between the shoulder 44 and an engagement wall 72 hanging from the upper front end of the square groove 68. ing. Further, the rubber roller 26 is in contact with the groove wall surface 76 on the lower side of the square groove 68, and when the carriage 10 moves, the rubber roller 26 is rotated by the frictional force between the rubber roller 26 and the groove wall surface 76, and the circular blade 22 is rotated.

The circular groove 70 covers more than half the outer circumference of the coil member 16 to substantially prevent the coil member from moving in the radial direction.
A boss 56 is engaged with the coil member 16 so as not to be relatively movable in the longitudinal direction. One end of the coil member 16 is a free end, and the other end is concentrically fixed to a drive shaft 80 of the motor 14 via a holder 78. Here, coil member 1
6 is wound to the right, the carriage 10 is moved to the right when the motor 14 rotates the coil member 16 clockwise, and to the left when the motor 14 rotates the coil member 16 counterclockwise.

In the sheet cutter device configured as described above, with the carriage 10 positioned at either the left or right end in FIG. 2 (the left end here), the guide frame 58 and the fixed blade 42 The sheet S is inserted into the gap formed between the fixed blade 42 and the guide frame 58 by the spacer 60 through the wedge-shaped gap formed between them, and is sent in the direction shown by the arrow in FIGS. 1 and 3. After the sheet S protrudes an appropriate length from the tip of the fixed blade 42, feeding is stopped.

Next, the motor 14 rotates the coil member 16 clockwise, thereby moving the carriage 10 to the right and rotating the circular blade 22.
The sheet S is cut by the cutting blade 34 and the tip of the fixed blade 42. After cutting the sheet S, the dog 49 of the carriage 10
When the detection end 54 of the right sensor 52 comes into contact with the detection end 54 of the right sensor 52, it is detected that the carriage 10 has reached the right end, the drive of the motor 14 is stopped, and the carriage 10 is stopped at the right end position. Next, when the sheet S is at the position where it is to be cut, the motor 14 rotates the coil member 16 counterclockwise, and the carriage 10 is moved to the left.

When the carriage 10 moves as described above, the shaft 30 is rotated by a small angle along the elongated hole 40 due to the frictional force between the circular blade 22 and the rubber roller 26 and the frame 12, and is fitted into the elongated hole 40. The circular blade 22 is tilted at a small angle with respect to the fixed blade 42. That is, the leading side of the circular blade 22 and the fixed blade 42 are in close contact with each other, and the trailing side and the fixed blade 42 are separated from each other, so that the sheet S can be cut well.

As described above, in the feeding device according to the present invention,
By rotating the coil member 16, the carriage 1
Since 0 is moved, the number of parts can be reduced and the structure can be simplified.

Furthermore, in this embodiment, the carriage 1
In order to increase the moving speed of zero, the pitch of the coil member 16 is made larger than that of a normal coil spring. By increasing the pitch, the moving speed of the carriage 10 can be increased without increasing the number of rotations of the motor 14, so that an inexpensive motor can be used. In addition, in order to increase the rigidity of the coil member 16, the average winding diameter D
The ratio of the wire diameter d to the wire diameter d was made smaller than that of a normal coil spring, and the wire used had excellent strength and hardness. By reducing the average winding diameter D, the bending rigidity and torsional rigidity of the coil member 16 can be increased.

Furthermore, since the coil member 16 is fitted into the circular groove 70 and rotated within the circular groove 70, bending deformation of the coil member 16 is less likely to occur, and engagement between the coil member 16 and the carriage 10 is prevented. It became difficult to come off.

The coil member supporting member does not necessarily have to have a circular groove shape, but may have a polygonal groove shape. The shape may be any shape that can substantially prevent movement in the radial direction while allowing rotation of the coil member, and any shape that can come into contact with at least three locations beyond half the circumference of the coil member.

Note that the number of bosses on the carriage is not limited to two, and may be one or three or more. The engaging portion of the carriage may have a shape that can be engaged with the coil member in a manner that it cannot move relative to the coil member in the longitudinal direction of the coil member and allows rotation of the coil spring. As shown in FIG. 5, it is also possible to use a lug 86 or the like having a through hole 84 that allows the winding of the coil member to pass through.

Although not illustrated in detail, the present invention can be implemented with various improvements and modifications based on the knowledge of those skilled in the art without departing from the scope of the claims.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a sheet cutter device to which a feeding device according to an embodiment of the present invention is applied.

FIG. 2 is a front view (partially sectional view) of the above embodiment.

FIG. 3 is an enlarged view of the AA cross section of the above embodiment.

FIG. 4 is a rear perspective view of the carriage used in the above embodiment.

FIG. 5 is a plan cross-sectional view showing a portion of another embodiment of the present invention.

[Explanation of symbols]

10 Carriage 14 Motor 16 Coil member 56 Boss 58 Guide frame 68 Square groove 70 Circular groove

Claims (1)

[Claims] 1. A coil member, a drive device that rotates the coil member around its longitudinal centerline, a coil member support member that supports the coil member from an outer circumferential side while allowing rotation, and the coil member. A carriage having an engaging portion that engages with a member in a manner immovable relative to the coil member in the longitudinal direction of the coil member and allowing rotation of the coil member; A feeding device comprising: a movably supported carriage guide.