JP4338817B2 - Locking mechanism of cylinder unit in stencil printing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylinder unit locking mechanism of a stencil printing machine for restricting the cylinder unit from coming out of a frame in a stencil printing machine for printing on paper using stencil paper.
[0002]
[Prior art]
In general, 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 outer periphery of the cylinder. Then, while the cylinder is rotated, the paper is fed to the outer periphery of the cylinder, and ink is supplied from the inside of the cylinder through the holes of the stencil sheet so that a predetermined printing pattern is printed on the paper. It has become.
[0003]
In the stencil printing machine having such a configuration, since the ink adheres to the cylinder itself and the inside thereof during printing, the cylinder unit including the cylinder is attached to the frame for periodic maintenance, cleaning, etc. It is configured to be removable. 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, further locking out is restricted by the lock mechanism.
[0004]
Conventionally, the lock mechanism has a configuration as shown below. That is, the operation handle having a quadrangular prism shape is arranged to extend in the length direction at the upper position of the cylinder unit. An engagement hole is provided at the distal end of the operation handle, and a restriction protrusion protruding from the frame is engaged in the engagement hole to restrict the cylinder unit from coming out. In addition, a release member that can be projected and retracted by a release button is provided in the engagement hole, and the restriction projection is pushed up from the engagement hole by the release member to engage the engagement hole and the restriction projection. It comes to cancel.
[0005]
When the cylinder unit is extracted, 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 restriction projection is released. On the contrary, when the cylinder unit is mounted, by pushing with force, the restricting projection is pushed away at the corner of the engagement hole, and the cylinder unit is inserted into the frame as it is.
[0006]
[Problems to be solved by the invention]
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. there were. Furthermore, in addition to the heavy cylinder unit, the square handle has a handle that can be reliably contacted only by its lower surface, so the cylinder unit must be supported mainly by the fingertips of the hand. There was a problem that it was difficult to hold the unit. Furthermore, when the cylinder unit is mounted, there is a problem that it has to be forcibly fitted and requires considerable force.
[0007]
The present invention has been made 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]
[Means for Solving the Problems]
In order to achieve the above object, the invention of the cylinder unit locking mechanism in the stencil printing machine according to claim 1 is that the stencil sheet is wound around the outer periphery of the cylinder and is fed to the outer periphery of the cylinder. In a stencil printing machine that prints on paper by supplying ink to the paper via a stencil paper, the cylinder is configured to be rotatably supported and to be detachable from a frame in the stencil printing machine. A unit, a support rod for supporting the cylinder unit by hand, a cylindrical lock sleeve rotatably mounted on the support rod, and the frame; The cylinder unit protrudes from a predetermined position on the frame due to the engagement relationship between the restriction member and the lock sleeve. A stopper configured to switch between an engagement position and a non-engagement position with respect to the restriction member by rotating the lock sleeve on the support rod, and interposed between the support rod and the lock sleeve. Rotation urging means for urging the lock sleeve in the rotation direction in which the restricting member is in the engagement position, and a rotation in which the stopper is in the disengagement position with respect to the restriction member when the cylinder unit is inserted into the frame Rotation guide means for guiding the lock sleeve in the moving direction is provided.
[0009]
The invention of the cylinder unit lock mechanism in the stencil printing machine according to claim 2 is the invention according to claim 1, wherein the rotation guide means is provided on a guide portion provided on a frame and an outer peripheral surface of the lock sleeve. It comprises an inclined part and a step part provided, and is configured such that the rotational position of the lock sleeve is determined by the inclined part and the step part guided by the guide part.
[0010]
The invention of the cylinder unit locking mechanism in the stencil printing machine according to claim 3 is the invention according to claim 1 or 2, wherein the restricting member is formed in a plate shape and a stopper is provided so as to correspond thereto. Is formed in a plate shape.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 2, the cylinder 11 is provided so as to rotate in the clockwise direction around the rotation shaft 11a at the approximate center in the main body 10 of the stencil printing machine, and a stencil sheet 12 is wound around the outer periphery thereof. Yes. The stencil sheet 12 is a heat-sensitive one in which Japanese paper and a resin film are overlapped. A predetermined printing pattern is baked on the stencil sheet 12, the resin film is melted, and only the Japanese paper remains. Print pattern holes are formed.
[0012]
The ink tank 13 disposed at a position below the rotary shaft 11a contains ink therein and is connected to a supply pump (not shown) to supply ink into the cylinder 11. The press roller 14 disposed at the lower position of the cylinder 11 is supported so as to rotate around the support shaft 14a while its peripheral surface is in contact with the outer periphery of the cylinder 11. A pressing roller 15 disposed in the cylinder 11 so as to face the pressing roller 14 presses the stencil sheet 12 against the surface of the pressing roller 14 while rotating clockwise.
[0013]
A plurality of sheets 17 are accommodated in a stacked state inside a sheet feeding cassette 16 mounted on the rear side (right side in FIG. 2) of the main body 10. These sheets 17 are sent one by one to the back of the main body 10 by the rotation of a sheet feeding roller 18 arranged to press and feed the sheet 17 at the lower part of the sheet feeding cassette 16. A pair of upper and lower feed rollers 19 and a guide plate 20 a provided between the paper feed cassette 16 and the cylinder 11 guide the paper 17 delivered from the inside of the paper feed cassette 16 and between the cylinder 11 and the press roller 14. To feed. Then, the cylinder 11 and the press roller 14 are rotated, and ink is supplied from the cylinder 11 through the hole of the stencil sheet 12 to the paper 17, and a predetermined printing pattern is printed on the paper 17. The printed sheet 17 is guided by a guide plate 20b disposed on the side of the press roller 14 and discharged to a sheet discharge tray 21 disposed in front of the main body 10 (on the left side in FIG. 2). Being held in a stacked state.
[0014]
The cylinder 11 is rotatably mounted in a cylinder unit 30 that 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.
[0015]
As shown in FIGS. 1, 3, and 4, in the cylinder unit 30, the support frame 31 includes a support plate 32 disposed on one end side (left side in FIGS. 1 and 4) and a support disposed on the other end side. The member 33 is composed of a support plate 32 and a pair of support rails 34 having an L-shaped cross section that is installed between both sides of the support plate 32 and the support member 33. 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 attached to the rotary shaft 11a. A pair of protective plates 33a are bent at both side edges of the support member 33. An ink holder 36 is disposed in the center between the protective plates 33a, and 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 by inserting the support rod 37 inside.
[0016]
The cylinder unit 30 includes the support frame 31, the cylinder 11, the rotating shaft 11a, the ink holder 36, the ink tank 13, the support rod 37, the lock sleeve 40, and the like. The pair of guide rails 22 constituting the frame of the main body 10 arranged so as to sandwich the cylinder unit 30 from the front and rear forms a concave shape opened to the side, and the both support rails 34 are accommodated inside thereof. Thus, the cylinder unit 30 is supported in the main body 10. Further, guide rollers 34a and 22a are provided at one end of each support rail 34 and the end of each guide rail 22, respectively, so that the support rail 34 is reciprocated on the guide rail 22 by both guide rollers 34a and 22a. It has become. In other words, the cylinder unit 30 is configured to be able to move to the side of the main body 10 while being pulled by the support rail 34 and the guide rail 22 while being pulled.
[0017]
The cylinder unit 30 is moved to the end of the guide rail 22 and is guided by a restriction plate 41 as a restriction member provided above the end of the guide rail 22 and a stopper 42 provided on the lock sleeve 40. Exit from the rail 22 is restricted. The restricting plate 41 has a square plate shape, is disposed so as 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 bulges so as to extend from the outer peripheral surface of one end of the lock sleeve 40 toward the restriction plate 41, and is formed so as to project into a horizontal trapezoidal plate shape that becomes narrower toward the restriction plate 41. Then, when the cylinder unit 30 is moved to the end of the guide rail 22 and the side surface of the stopper 42 is engaged with the side surface of the restriction plate 41, the cylinder unit 30 is restricted from coming out of the guide rail 22 and locked to the main body 10. ing.
[0018]
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 as follows. That is, as shown in FIG. 5 (b), the inclined surface 42 a of the stopper 42 in the non-engagement position is positioned in parallel with the front end surface 41 b of the restricting plate 41, and there is a slight gap between the members 41, 42. Is formed. In this disengaged position, the cylinder unit 30 is configured to be unlocked from the main body 10 and can be extracted from the main body 10 by moving the support rod 37 as it is.
[0019]
A 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 at one end to the peripheral surface of the support rod 37 and the other end. Is inserted and fixed in a mounting groove 40a recessed in the front end surface of the lock sleeve 40. When the cylinder unit 30 is extracted, the coil spring 43 urges the lock sleeve 40 to rotate so that the stopper 42 that is in the non-engagement position with respect to the restriction plate 41 returns to the engagement position.
[0020]
When the pulled-out cylinder unit 30 is mounted in the main body 10 again, the lock sleeve 40 and the frame of the main body 10 are attached to the lock sleeve 40 and the main body 10 in order to release the engagement between the restriction plate 41 and the stopper 42 and allow the cylinder unit 30 to be inserted. A rotation guide means is provided.
[0021]
A guide pin 44 as a guide portion constituting the rotation guide means is attached to a frame (not shown) via an L-shaped bracket 44 a so as to extend in a direction orthogonal to the axis of the lock sleeve 40 at a position facing the restriction plate 41. Installed. As shown in FIG. 5A, the inclined surface 45 as the inclined portion and the stepped surface 46 as the stepped portion constituting the rotation guide means are continuously protruded from the outer peripheral surface of the lock sleeve 40. It is formed as a notch. The inclined surface 45 and the stepped surface 46 are adapted to determine the rotational position of the lock sleeve 40 while being guided by the guide pin 44 in accordance with the moving distance when the cylinder unit 30 is inserted.
[0022]
That is, as shown in FIG. 5B, the length and the inclination of the inclined surface 45 are such that the lock sleeve 40 rotated against the urging force has a stopper 42 and a regulating plate at the apex 45a of the inclined surface 45. 41 is set to be disengaged. As shown in FIG. 5C, the length of the step surface 46 and the difference in level of the step are determined by the locking by the biasing force of the coil spring 43 after the stopper 42 has passed the side of the regulating plate 41 in the non-engaged state. It is set so as to return to the engaged state by the rotation of the sleeve 40. When the cylinder unit 30 is inserted into the frame inside the main body 10, the lock to the main body 10 is automatically released by the guide pins 44, the inclined surface 45 and the step surface 46, and then returns to the locked state. It is configured as follows.
[0023]
Next, the operation of the lock mechanism in the cylinder unit 30 will be described.
As shown in FIG. 2, when printing is performed by a stencil printing machine, first, a sheet 17 is fed from a sheet feed cassette 16 to a pair of feed rollers 19 by a sheet feed roller 18 inside the main body 10, and a guide plate. It is supplied between the rotating cylinder 11 and the press roller 14 while being guided by 20a. 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. The ink on the surface of the pressing roller 15 is pressed onto the sheet 17 through the holes of the stencil sheet 12 wound around the outer periphery of the cylinder 11 by being pressed by the pressing roller 14 and printed with a predetermined printing pattern. The 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 and held on the paper discharge tray 21 while being guided by the guide plate 20b.
[0024]
After printing is performed in this manner, when exchanging the stencil sheet 12 on the outer periphery of the cylinder 11 or cleaning the ink adhering to the periphery of the cylinder 11, the cylinder unit 30 including the cylinder 11 is inserted from the inside of the main body 10. It is necessary to take it out.
[0025]
As shown in FIG. 1, when the cylinder unit 30 is taken out, first, the support rod 37 or the support member 33 is held by hand and pulled sideways. 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 restriction plate 41, the cylinder unit 30 is locked to the main body 10, and further extraction is restricted.
[0026]
In order to release the lock of the cylinder unit 30 with respect to the main body 10, first, while holding the support rod 37 with one hand, the lock sleeve 40 is gripped with the other hand. Next, as shown in FIG. 5B, when the lock sleeve 40 is rotated and the engagement of the restriction plate 41 and the stopper 42 is released, the lock of the cylinder unit 30 is released. If the support rod 37 is further pulled with one hand while the unlocked state is maintained with the other hand, the cylinder unit 30 is completely pulled out from the main body 10, and the support rod 37 with one hand or both hands is left as it is. The cylinder unit 30 is carried to another place while holding the stencil, and the stencil sheet 12 is exchanged and cleaned. 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.
[0027]
After the stencil sheet 12 has been replaced and cleaned, the cylinder unit 30 is inserted into the main body 10 and mounted again. When inserting the cylinder unit 30, first, while holding the support rod 37 by hand, the support rail 34 is aligned with the guide rail 22, and the end of the support rail 34 is inserted into the guide rail 22. One side of the unit 30 is supported on the guide rail 22. Next, when the cylinder unit 30 is pushed into 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 rail 22. At this time, the lock of the cylinder unit 30 with respect to the main body 10 is automatically released.
[0028]
In releasing the lock, first, as shown in FIG. 5A, the inclined surface 45 is brought into contact with the circumferential 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 contacted with the guide pin 44, and resists the urging force of the coil spring 43. 42 and the restricting plate 41 are rotated so as to be in the non-engagement position. When the cylinder unit 30 is pushed further in this state, the stopper 42 passes the side of the regulating plate 41 while the lock sleeve 40 is guided by the stepped surface 46 slidably contacted with the guide pin 44 as shown in FIG. Then, the stopper 42 and the restricting plate 41 are rotated by the urging force of the coil spring 43 so as to be in the engaged position. The cylinder unit 30 is mounted by being pushed into the innermost part of the main body 10 as it is.
[0029]
In the series of insertion / removal operations of the cylinder unit 30 as described above, the support rod 37 has a round bar shape so that it is easy to grip, and the cylinder unit 30 is easily gripped by hand. Further, when the cylinder unit 30 is pulled out, the lock sleeve 40 is externally fitted to the support rod 37 when the lock on the main body 10 is released, so that the rotation operation of the lock sleeve 40 is easily and quickly performed. In addition, the guide pin 44, the inclined surface 45, and the step surface 46 are automatically unlocked and locked when the cylinder unit 30 is inserted.
[0030]
The effects exhibited by this 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 it is configured to automatically unlock and lock the main body 10 when the cylinder unit 30 is inserted, the cylinder unit 30 can be easily inserted.
[0031]
-When the cylinder unit 30 is inserted, the unlocking and locking of the main body 10 is performed by a guide pin 44 provided on the frame of the main body 10 and an inclined surface 45 and a step surface 46 provided on the lock sleeve. Yes. For this reason, the cylinder unit 30 can be inserted more easily, and the lock on the main body 10 can be performed simultaneously.
[0032]
Since the restricting plate 41 is formed in a square plate shape and the stopper 42 corresponding to the restricting plate 41 is formed in a trapezoid plate shape, the engagement area is wide, and the cylinder unit 30 is reliably restricted from coming off from the main body 10. be able to.
[0033]
Since the rotation urging member is configured by the coil spring 43, the configuration of the lock sleeve 40 can be simplified.
Since the lock sleeve 40 is provided near one end of the support rod 37, when the cylinder unit 30 is extracted, the lock sleeve 40 is exposed to the outside of the main body, so that a rotation operation for unlocking can be easily performed.
[0034]
In addition, this embodiment can also be changed and embodied as follows.
The restriction plate 41 and the stopper 42 of the embodiment may be omitted, and the guide pin 44 and the step surface 46 may be used as the restriction member and the stopper.
[0035]
Even in such a configuration, the engagement of the step surface 46 and the guide pin 44 can restrict the withdrawal of the cylinder unit 30 from the main body 10.
[0036]
-You may comprise a rotation bias means with a leaf | plate spring, sponge, rubber | gum etc., for example.
In the case of such a configuration, the lock sleeve 40 can be urged similarly to the coil spring 43 of the embodiment.
[0037]
For example, a recess corresponding to the shape of the inclined surface 45 and the step surface 46 is recessed on the outer peripheral surface of the lock sleeve 40 by a width corresponding to the diameter of the guide pin 44, and the recess is formed into the inclined portion and the step portion. For example, the inclined portion and the stepped portion may be configured.
[0038]
When configured in this way, 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 metal fitting 44a is used as the guide portion, or the guide pin 44 is reduced in diameter toward the tip, Or you may comprise by making it into a square pillar-shaped guide rod.
[0039]
Even in such a configuration, the inclined surface 45 and the step surface 46 can be guided.
-You may form the support rod 37 in prismatic shapes, such as hexagonal column shape and octagonal column shape, for example.
[0040]
Also when comprised in this way, while being able to make it easy to grasp the support rod 37, it can prevent that a finger | toe slips by increasing a corner | angular part.
For example, the lock position may be changed by providing the lock sleeve 40 in the center of the support rod 37 so that the cylinder unit 30 is locked to the main body 10 when the cylinder unit 30 is pulled out by half.
[0041]
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 restriction plate 41 may be formed in, for example, a cylindrical shape, a triangular plate shape, a conical shape, or the like.
[0042]
Even in such a configuration, the cylinder unit 30 can be locked by the engagement with the stopper 42.
The stopper 42 may be formed in a columnar shape, a triangular plate shape, a long square plate shape, a conical shape, or the like, for example.
[0043]
Even in such a configuration, the cylinder unit 30 can be locked by engagement with the restriction plate 41.
Further, the technical idea that can be grasped from the embodiment will be described below.
[0044]
The cylinder unit locking mechanism 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.
When comprised in this way, it can make it easier to have a cylinder unit.
[0045]
4. The stencil according to any one of claims 1 to 3, wherein the position of the lock sleeve is set so that the cylinder unit is locked out of the frame when at least half of the length of the cylinder unit is out of the frame. Cylinder unit locking mechanism for printing machines.
[0046]
When configured in this manner, the rotation operation of the lock sleeve can be easily performed.
[0047]
【The invention's effect】
As described in detail above, the present invention has the following effects.
According to the cylinder unit locking mechanism in the stencil printing machine of the first aspect, the cylinder unit can be easily held and the cylinder unit can be easily inserted.
[0048]
According to the cylinder unit lock mechanism in the stencil printing machine of the invention described in claim 2, in addition to the effect of the invention described in claim 1, the cylinder unit can be inserted more easily.
[0049]
According to the cylinder unit locking mechanism in the stencil printing machine of the invention described in claim 3, in addition to the effect of the invention described in claim 1 or claim 2, the withdrawal of the cylinder unit from the main body is reliably regulated. be able to.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which 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.
5A is a perspective view with a part broken away showing the lock sleeve when the cylinder unit is inserted, FIG. 5B is a perspective view showing the lock sleeve in an unlocked state, and FIG. 5C is locked. The perspective view which shows the lock sleeve of a state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Cylinder, 12 ... Stencil paper, 17 ... Paper, 22 ... Guide rail which comprises a frame, 30 ... Cylinder unit, 37 ... Support rod, 40 ... Lock sleeve, 41 ... Restriction board as a regulation member, 42 ... Stopper, 43 ... Coil spring as a rotation urging means, 44 ... Guide pin, 45 ... Inclined surface, 46 ... Step surface.

Claims (3)

In a stencil printing machine that prints on a sheet by supplying ink through the stencil sheet to a sheet fed to the outer periphery of the cylinder while the stencil sheet is wound around the cylinder outer periphery,
A cylinder unit configured to rotatably support the cylinder and to be detachable with respect to a frame in the stencil printing machine;
A support rod provided in the cylinder unit for supporting the cylinder unit by hand;
A cylindrical locking sleeve mounted rotatably on the support rod;
A regulating member provided on the frame;
The lock sleeve protrudes from the lock sleeve to lock the cylinder unit from coming out of a predetermined position on the frame by the engagement relationship with the restriction member, and the engagement position with respect to the restriction member by rotating the lock sleeve on the support rod. A stopper configured to switch between the non-engaging positions;
A rotation urging means that is interposed between the support rod and the lock sleeve and urges the lock sleeve in a rotation direction in which the stopper and the regulating member become the engagement positions;
Cylinder unit locking mechanism in a stencil printing machine comprising rotation guide means for guiding a lock sleeve in a rotation direction in which the stopper is in a non-engagement position with respect to the regulating member when the cylinder unit is inserted into the frame. . The rotation guide means includes a guide portion provided on the frame, and an inclined portion and a step portion provided on the outer peripheral surface of the lock sleeve, and the rotation position of the lock sleeve is inclined by the guide portion. The cylinder unit locking mechanism in the stencil printing machine according to claim 1, wherein the cylinder unit is configured to be defined by a portion and a step portion. The cylinder unit locking mechanism in a stencil printing machine according to claim 1 or 2, wherein the restricting member is formed in a plate shape and a stopper is formed in a plate shape so as to correspond to the plate.

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