JP2000289319A - Locking mechanism of cylinder unit for stencil printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily hold a cylinder unit and to easily insert the unit. SOLUTION: A supporting rod 37 of the cylinder unit 30 is formed in a round rod state. A locking sleeve 40 formed in a cylindrical shape is rotatably mounted on the rod 31. The unit 30 is locked from being drawn from a guide rail 22 by engaging a stopper 42 projected from the sleeve 40 with a restraint plate 41. In the case of inserting the unit 30, a guide pin 44 is automatically unlocked by an oblique surface and a step surface projected from the sleeve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing machine for printing on a stencil sheet using a stencil sheet, and a cylinder unit lock mechanism of the stencil printing machine for restricting a cylinder unit from coming out of a frame. It is about.

[0002]

2. Description of the Related Art Generally, in a stencil printing machine, a cylinder is rotatably supported by a frame, and a stencil sheet having holes of a predetermined printing pattern is wound around the cylinder. And while the cylinder is being rotated,
The paper is fed to the outer periphery, and ink is supplied onto the paper from the cylinder through the holes of the stencil sheet, so that a predetermined print pattern is printed on the paper.

In a stencil printing machine having such a configuration, since a cylinder itself and ink adhere to the cylinder during printing, a cylinder unit including the cylinder is required to perform maintenance and cleaning periodically. It is configured to be insertable into and removable from the frame. A lock mechanism is interposed between the cylinder unit and the frame, and when the cylinder unit is pulled out to a predetermined position on the frame, the lock mechanism restricts further removal.

Conventionally, a lock mechanism has the following configuration. That is, the quadrangular pillar-shaped operation handle is disposed so as to extend in the length direction at a position above the cylinder unit. An engagement hole is provided at the tip of the operation handle, and a restriction projection projecting from the frame is engaged in the engagement hole to restrict the cylinder unit from coming off. A release member is provided in the engagement hole so as to be able to protrude and retract by a release button. The release member pushes up the restriction protrusion from the inside of the engagement hole, and engages the engagement hole and the restriction protrusion. It is designed to be released.

When the cylinder unit is to be removed, the release button is operated with a finger while holding the operation handle by hand, and the cylinder unit is pulled out as it is in a state where the engagement of the engagement hole and the regulating projection is released. Conversely, when mounting the cylinder unit, the cylinder unit is inserted into the frame as it is by pushing it in with force, so that the regulating protrusion is pushed away at the corner of the engagement hole.

[0006]

However, in this conventional lock mechanism, the release button is provided so as to be substantially flush with the outer surface of the operation handle.
During operation, there is a problem that fingers are hard to hook and may slip. In addition, the cylinder unit is heavy, and the square pillar-shaped operation handle makes sure that the hand only contacts the lower surface, so the cylinder unit must be supported only by the fingertips of the hand. There was a problem that it was difficult to hold the unit. further,
When the cylinder unit is mounted, there is a problem that the fitting must be forcibly performed and a considerable force is required.

The present invention has been made by paying attention to such problems existing in the prior art. An object of the present invention is to provide a cylinder unit locking mechanism in a stencil printing machine that can easily hold the cylinder unit and can easily insert the cylinder unit.

[0008]

In order to achieve the above object, the invention of a cylinder unit locking mechanism in a stencil printing machine according to a first aspect of the present invention provides a stencil sheet having a stencil sheet wound around an outer periphery of a cylinder. In a stencil printing machine that performs printing on paper by supplying ink to the paper fed to the outer periphery of the cylinder through a stencil sheet, the cylinder is rotatably supported, and a frame in the stencil printing machine is supported. A cylinder unit configured to be inserted and removed, a support rod provided on the cylinder unit for manually supporting the cylinder unit, and a cylindrical lock rotatably mounted on the support rod. Sleeve and
A restricting member provided on the frame and the lock sleeve project from the lock sleeve to lock the cylinder unit from coming out of a predetermined position on the frame by engagement with the restricting member, and to rotate the lock sleeve on the support rod. A stopper configured to switch between an engaged position and a non-engaged position with respect to the regulating member by a moving operation, and a stopper interposed between the support rod and the lock sleeve in a rotational direction in which the stopper and the regulating member are in the engaged position. Rotation urging means for urging the lock sleeve, and rotation guide means for guiding the lock sleeve in a rotation direction in which the stopper is at a non-engagement position with respect to the regulating member when the cylinder unit is inserted into the frame. It is provided with.

According to a second aspect of the present invention, there is provided a stencil printing machine having a lock mechanism for a cylinder unit, wherein the rotation guide means comprises a guide provided on a frame and a lock sleeve. The lock sleeve includes a slope and a step provided on the outer peripheral surface, and the rotation position of the lock sleeve is determined by the slope and the step guided by the guide.

According to a third aspect of the present invention, there is provided a lock mechanism for a cylinder unit in a stencil printing machine. In the first or second aspect of the invention, the restricting member is formed in a plate shape and corresponds thereto. Thus, the stopper is formed in a plate shape.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 2, the cylinder 11 is provided substantially at the center of the stencil printing machine main body 10 so as to rotate clockwise about a rotation shaft 11a, and the stencil paper 12 is wound around the outer periphery thereof. I have.
The stencil paper 12 is a heat-sensitive stencil made by laminating a Japanese paper and a resin film. A predetermined printing pattern is printed on the stencil paper 12, the resin film is melted, and only the Japanese paper remains. The holes of the print pattern are formed.

An ink tank 13 disposed below the rotary shaft 11a stores ink therein, and is connected to a supply pump (not shown) to supply ink to the inside of the cylinder 11. Cylinder 11
The press roller 14 disposed at the lower position is supported so that its peripheral surface rotates around the support shaft 14 a while being in contact with the outer periphery of the cylinder 11. Press roller 1 disposed in cylinder 11 so as to face press roller 14
5 presses the stencil paper 12 against the surface of the press roller 14 while rotating clockwise.

A plurality of sheets 17 are stored in a stacked state inside a sheet cassette 16 mounted behind the main body 10 (right side in FIG. 2). These papers 17 are fed one by one to the back of the main body 10 by rotation of a paper feed roller 18 arranged to press and feed the papers 17 below the paper feed cassette 16. A pair of upper and lower feed rollers 19 and a guide plate 20a provided between the paper feed cassette 16 and the cylinder 11 guide the paper 17 sent out from the paper feed cassette 16 and move between the cylinder 11 and the press roller 14. To be fed.
Then, the cylinder 11 and the press roller 14 are rotated, ink is supplied from the inside of the cylinder 11 to the paper 17 through the holes of the stencil paper 12, and a predetermined print pattern is printed on the paper 17. The printed paper 17 is placed on the guide plate 2 disposed on the side of the press roller 14.
0b, and is discharged to a paper discharge tray 21 disposed at a lower portion in front of the main body 10 (left side in FIG. 2), and is held in a stacked state.

The cylinder 11 is rotatably mounted in a cylinder unit 30 which can be inserted and removed from the side of the main body 10. Therefore, the configuration of the cylinder unit 30 will be described below.

As shown in FIGS. 1, 3 and 4, the support frame 31 of the cylinder unit 30 has a support plate 32 disposed at one end (the left side in FIGS. 1 and 4) and a support plate 32 disposed at the other end. Support member 33, support plate 32 and support member 33
And a pair of support rails 34 having an L-shaped cross-section and provided between both side portions of the support rail. The rotary shaft 11a is rotatably supported between the center portions of the support plate 32 and the support member 33 via a bearing 35, and the cylinder 11 is mounted on the rotary shaft 11a. A pair of protective plates 33a are formed on both side edges of the support member 33, and an ink holder 36 is disposed in the center between the protective plates 33a. The ink tank 13 is accommodated in the ink holder 36. ing. At a position above the cylinder 11, a support rod 37 having a round bar shape is provided between the support plate 32 and the support member 33. The cylindrical lock sleeve 40 is rotatably mounted at a position near one end on the support rod 37 when the support rod 37 is inserted through the inside thereof.

The cylinder unit 30 comprises the above-described support frame 31, cylinder 11, rotary shaft 11a, ink holder 36, ink tank 13, support rod 37, lock sleeve 40, and the like. This cylinder unit 30
A pair of guide rails 22 constituting a frame of the main body 10 arranged so as to sandwich the cylinder unit 30 from the front and rear have a concave shape opened to the side, and the two support rails 34 are accommodated inside the guide rails 22 so as to accommodate the cylinder unit 30. Are supported in the main body 10. A guide roller 34 is provided at one end of each support rail 34 and at the end of each guide rail 22.
a, 22a are provided, and both guide rollers 34a, 22a
Thus, the support rail 34 is reciprocated on the guide rail 22. That is, the cylinder unit 30
Is configured to be able to move to the side of the main body 10 by being pulled, while being guided by the support rail 34 and the guide rail 22 in the drawing direction.

The cylinder unit 30 includes a guide rail 22
In the state in which the guide plate 22 is moved to the end, the control plate 41 as a control member provided at a position above the end of the guide rail 22 and the stopper 42 provided on the lock sleeve 40
The escape from the guide rail 22 is restricted. The restricting plate 41 has a square plate shape, is arranged to face the support rod 37, and is attached to a frame (not shown) provided so as to surround the cylinder unit 30 by two screws 41a. The stopper 42 protrudes from one end outer peripheral surface of the lock sleeve 40 so as to extend toward the regulating plate 41, and is formed to protrude so as to form a horizontal trapezoidal plate that becomes narrower toward the regulating plate 41. And
When the cylinder unit 30 is moved to the end of the guide rail 22, the side of the stopper 42 is engaged with the side of the restriction plate 41, so that the cylinder unit 30 is prevented from coming off from the guide rail 22 and locked to the main body 10. .

As shown in FIGS. 5A and 5B, the restriction plate 41 and the stopper 42 are disengaged from the engaged state by rotating the lock sleeve 40 counterclockwise. It is configured to be in a state. That is, as shown in FIG.
The second inclined surface 42 a is located parallel to the tip end surface 41 b of the regulating plate 41, and a slight gap is formed between the two members 41 and 42. In this disengaged position, the cylinder unit 30 is unlocked from the main body 10, and the support rod 37 is moved as it is.
It is configured so that it can be extracted from the inside.

One end of the coil spring 43 as a rotation urging means interposed between the inner peripheral surface of the other end of the lock sleeve 40 and the peripheral surface of the support rod 37 is inserted and fixed to the peripheral surface of the support rod 37. The other end is inserted and fixed in a mounting groove 40a recessed in the distal end face of the lock sleeve 40. The coil spring 43 urges the lock sleeve 40 in a direction to rotate the lock sleeve 40 so that the stopper 42 which is in the non-engagement position with respect to the regulating plate 41 returns to the engagement position when the cylinder unit 30 is extracted.

When the pulled-out cylinder unit 30 is mounted in the main body 10 again, the regulating plate 41 and the stopper 42
The lock sleeve 40 and the frame of the main body 10 are provided with rotation guide means to release the engagement with the cylinder unit 30 and allow the cylinder unit 30 to be inserted.

A guide pin 44 as a guide portion constituting the rotation guide means is illustrated via an L-shaped bracket 44a so as to extend in a direction orthogonal to the axis of the lock sleeve 40 at a position facing the regulating plate 41. Not mounted on the frame. As shown in FIG. 5A, an inclined surface 45 as an inclined portion and a stepped surface 46 as a stepped portion constituting the rotation guide means have both surfaces 45 and 46 continuously projecting from the outer peripheral surface of the lock sleeve 40. The notch is formed as follows. The inclined surface 45 and the step surface 46 are adapted to the moving distance when the cylinder unit 30 is inserted, and
The rotation position of the lock sleeve 40 is determined while being guided by the guide.

That is, as shown in FIG. 5 (b), the length and the inclination of the inclined surface 45 are determined such that the lock sleeve 40 rotated against the urging force has the stopper 42 at the vertex 45a of the inclined surface 45. And the engagement of the regulating plate 41 is released. As shown in FIG. 5C, the length of the step surface 46 and the height difference of the step are determined by the locking by the urging force of the coil spring 43 after the stopper 42 has passed the side of the regulating plate 41 in the disengaged state. The rotation of the sleeve 40 is set to return to the engaged state. When the cylinder unit 30 is inserted into the frame in the main body 10, the guide pins 4
4, the lock to the main body 10 is automatically released by the inclined surface 45 and the step surface 46, and thereafter, the locked state is returned.

Next, the operation of the lock mechanism in the cylinder unit 30 will be described. Now, as shown in FIG. 2, when performing printing with a stencil printing machine, first, the main body 10
Paper 17 is fed from a paper feed cassette 16 to a space between a pair of feed rollers 19 by an internal feed roller 18,
While being guided by Oa, it is supplied between the rotating cylinder 11 and the press roller 14. On the other hand, in the cylinder 11, ink is supplied from the ink tank 13 to the surface of the pressing roller 15 via a supply pump. Then, the ink on the surface of the pressing roller 15 is pressed by the press roller 14 so that the stencil paper 12
Dyeing is performed on the paper 17 through the holes, and printing of a predetermined print pattern is performed. The printed paper 17 is sent to the guide plate 20b by the rotation of the cylinder 11 and the press roller 14, and is discharged onto the discharge tray 21 while being guided by the guide plate 20b, and is held.

After the printing is performed in this manner, when the stencil paper 12 on the outer periphery of the cylinder 11 is to be replaced or the ink adhered to the peripheral edge of the cylinder 11 is to be cleaned, the cylinder containing the cylinder 11 from the inside of the main body 10 is used. It is necessary to take out the unit 30.

As shown in FIG. 1, the cylinder unit 30
When taking out, first, the support rod 37 or the support member 33 is gripped by hand and pulled to the side. Then, the cylinder unit 30 is moved with respect to the main body 10 while being guided by the pair of guide rails 22. Next, when the cylinder unit 30 is moved to the end of the guide rail 22, the stopper 42 is engaged with the regulating plate 41, the cylinder unit 30 is locked to the main body 10, and further withdrawal is regulated.

To release the lock of the cylinder unit 30 with respect to the main body 10, first, the support rod 3 is held with one hand.
7 while holding the lock sleeve 40 with the other hand. Next, as shown in FIG. 5B, when the lock sleeve 40 is rotated to release the engagement between the restriction plate 41 and the stopper 42, the lock of the cylinder unit 30 is released. When the support rod 37 is further pulled with one hand while maintaining the unlocked state with the other hand, the cylinder unit 30 is completely pulled out from the main body 10 and the support rod 37 is held with one or both hands as it is. The stencil paper 12 is exchanged and cleaned while the cylinder unit 30 is carried to another place while holding the stencil. The lock sleeve 40 is returned to the position before the rotation by releasing the other hand by the urging force of the coil spring 43.

After the stencil sheet 12 has been replaced, cleaned, etc., the cylinder unit 30 is inserted into the main body 10,
Re-attached. When inserting the cylinder unit 30, first, while gripping the support rod 37 by hand, align the support rail 34 with the guide rail 22, and insert the end of the support rail 34 into the guide rail 22. One side of the unit 30 is supported by the guide rail 22. Next, when the cylinder unit 30 is pushed deep inside the main body 10 while holding the support rod 37, the cylinder unit 30 is inserted into the main body 10 while being guided by the guide rails 22. At this time, the lock of the cylinder unit 30 to the main body 10 is automatically released.

In releasing the lock, first, FIG.
As shown in (a), the inclined surface 45 is in contact with the peripheral surface of the guide pin 44 at the end of the lock sleeve 40. When the cylinder unit 30 is pushed in this state, as shown in FIG. 5B, the lock sleeve 40 is guided by the inclined surface 45 slidably in contact with the guide pin 44, and the coil spring 4
The stopper 42 and the restricting plate 41 are turned to the non-engagement position against the urging force of No. 3. When the cylinder unit 30 is further pushed in as it is, as shown in FIG. 5C, the stopper 42 passes by the side of the regulating plate 41 while the lock sleeve 40 is guided by the step surface 46 slidably in contact with the guide pin 44. Then, the stopper 42 and the regulating plate 41 are rotated by the urging force of the coil spring 43 to the engagement position. And the cylinder unit 30
It is mounted by being pushed into the innermost part of the main body 10 as it is.

A series of cylinder units 3 as described above
In the insertion / removal operation of 0, since the support rod 37 has a round bar shape, it is easy to grasp, and the cylinder unit 30 is easily grasped by hand. When the lock on the main body 10 is released when the cylinder unit 30 is pulled out,
Since the lock sleeve 40 is externally fitted to the support rod 37, the rotation operation of the lock sleeve 40 is performed easily and quickly. In addition, the unlocking and locking when the cylinder unit 30 is inserted are automatically performed by the guide pin 44, the inclined surface 45, and the step surface 46.

The effects exerted by the present embodiment will be described below. -Since the support rod 37 for supporting the cylinder unit 30 is formed in a round bar shape, the cylinder unit 30 can be easily held. In addition, since the unlocking and locking of the main body 10 are automatically performed when the cylinder unit 30 is inserted, the cylinder unit 30 can be easily inserted.

The unlocking and locking of the main body 10 when the cylinder unit 30 is inserted are performed by the guide pins 44 provided on the frame of the main body 10 and the inclined surface 45 and the step surface 46 provided on the lock sleeve. It is configured. For this reason, the cylinder unit 3
0 can be inserted more easily, and locking to the main body 10 can be performed at the same time.

The regulating plate 41 is formed in the shape of a square plate, and the stopper 42 corresponding thereto is formed in the shape of a trapezoidal plate.
From the main body 10 can be reliably restricted.

The structure of the lock sleeve 40 can be simplified since the rotation urging member is constituted by the coil spring 43. Since the lock sleeve 40 is provided near one end of the support rod 37, when the cylinder unit 30 is pulled out, the lock sleeve 40 is exposed to the outside of the main body, so that the rotation operation for unlocking can be easily performed.

The present embodiment can be embodied with the following modifications. -The restriction plate 41 and the stopper 42 of the embodiment are omitted,
The guide pin 44 and the step surface 46 may also be used as a regulating member and a stopper.

Even in the case of such a configuration, the cylinder unit 30 can be prevented from coming out of the main body 10 by the engagement relationship between the step surface 46 and the guide pin 44.

The rotation urging means may be constituted by, for example, a leaf spring, sponge, rubber or the like. With such a configuration, the lock sleeve 40 can be urged similarly to the coil spring 43 of the embodiment.

For example, a concave line corresponding to the shape of the inclined surface 45 and the step surface 46 is formed on the outer peripheral surface of the lock sleeve 40 by a width corresponding to the diameter of the guide pin 44, and the concave line is formed. Alternatively, the inclined portion and the step portion may be configured by using the step portion and the like.

In the case of such a configuration, the strength can be improved by increasing the thickness of the lock sleeve 40. The guide portion is not limited to the cylindrical guide pin 44. For example, the corner portion of the L-shaped bracket 44a may be used as the guide portion, or the conical guide pin 44 may be reduced in diameter toward the tip.
Or a square pole guide rod.

Even in such a configuration, the inclined surface 45 and the step surface 46 can be guided. -The support rod 37 may be formed in a prismatic shape such as a hexagonal prism shape or an octagonal prism shape.

Also in the case of such a configuration, the support rod 37 can be easily gripped, and the finger can be prevented from slipping by increasing the number of corners. For example, the lock position may be changed, for example, by providing the lock sleeve 40 at the center of the support rod 37 and locking the main unit 10 when the cylinder unit 30 is pulled out by half.

Even in such a configuration, since the lock sleeve 40 is exposed to the outside of the main body 10, the rotation operation can be easily performed. The regulating plate 41 may be formed in, for example, a columnar shape, a triangular plate shape, a conical shape, or the like.

Even in the case of such a configuration, the stopper 4
The cylinder unit 30 can be locked by the engagement with the cylinder unit 2. The stopper 42 may be formed in, for example, a column shape, a triangular plate shape, a rectangular plate shape, a conical shape, or the like.

Even in the case of such a configuration, the regulating plate 41
Can lock the cylinder unit 30. Further, technical ideas that can be grasped from the embodiment will be described below.

The lock mechanism of the cylinder unit in the stencil printing machine according to any one of claims 1 to 3, wherein the support rod is formed in a round bar shape. With this configuration, the cylinder unit can be more easily held.

The position of the lock sleeve is set to lock the escape from the frame when at least half of the length of the cylinder unit with respect to the frame comes off. A lock mechanism of a cylinder unit in the stencil printing machine described in the above.

With this configuration, the operation of rotating the lock sleeve can be easily performed.

[0047]

As described above in detail, according to the present invention, the following effects can be obtained. According to the lock mechanism of the cylinder unit in the stencil printing machine according to the first aspect of the invention, the cylinder unit can be easily held and the cylinder unit can be easily inserted.

According to the cylinder unit locking mechanism of the stencil printing machine according to the second aspect, in addition to the effect of the first aspect, the cylinder unit can be more easily inserted.

According to the stencil printing machine of the third aspect of the present invention, in addition to the effect of the first or second aspect of the present invention, the cylinder unit lock mechanism ensures that the cylinder unit comes off from the main body. Can be regulated.

[Brief description of the drawings]

FIG. 1 is an exemplary perspective view showing a state where a cylinder unit according to an embodiment is locked.

FIG. 2 is a conceptual diagram showing the structure of a stencil printing machine.

FIG. 3 is a side view showing a cylinder unit.

FIG. 4 is a front view showing a cylinder unit.

FIG. 5A is a partially cutaway perspective view showing a lock sleeve when a cylinder unit is inserted, FIG. 5B is a perspective view showing the lock sleeve in an unlocked state, and FIG.
FIG. 4 is a perspective view showing a lock sleeve in a locked state.

[Explanation of symbols]

11 ... cylinder, 12 ... stencil paper, 17 ... paper, 22 ...
Guide rails constituting the frame, 30: cylinder unit, 37: support rod, 40: lock sleeve, 41
... a regulating plate as a regulating member, 42 ... a stopper, 43 ... a coil spring as a rotation urging means, 44 ... a guide pin, 45
... inclined surface, 46 ... step surface.

Claims (3)

[Claims] 1. A stencil printing machine that prints on a stencil sheet while the stencil sheet is wound around the outer periphery of a cylinder and ink is supplied to the sheet fed to the outer periphery of the cylinder via the stencil sheet. A cylinder unit rotatably supporting the cylinder and configured to be insertable into and removable from a frame in the stencil printing machine; and a support rod provided on the cylinder unit for manually supporting the cylinder unit; A cylindrical lock sleeve rotatably mounted on the support rod; a restricting member provided on the frame; and a protruding member provided on the lock sleeve, and a lock member on the frame provided in an engagement relationship with the restricting member. Locking the cylinder unit from coming out of the predetermined position, and rotating the lock sleeve on the support rod, the lock A stopper configured to switch between an engaged position and a disengaged position; and a stopper interposed between the support rod and the lock sleeve, for urging the lock sleeve in a rotation direction in which the stopper and the regulating member are at the engaged position. Stencil printing comprising: a rotation urging means; and a rotation guide means for guiding a lock sleeve in a rotation direction in which a stopper is in a disengaged position with respect to a regulating member when the cylinder unit is inserted into a frame. Mechanism of the cylinder unit in the machine. 2. The rotation guide means comprises a guide portion provided on a frame, an inclined portion and a step portion provided on an outer peripheral surface of a lock sleeve, and adjusts a rotation position of the lock sleeve by a guide portion. The lock mechanism for a cylinder unit in a stencil printing machine according to claim 1, wherein the lock mechanism is configured to be defined by an inclined portion and a step portion guided to the stencil printer. 3. The lock mechanism for a cylinder unit in a stencil printing machine according to claim 1, wherein the restricting member is formed in a plate shape, and the stopper is formed in a plate shape so as to correspond thereto.