JPS62941Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a seat body locking structure for removably locking a seat body to a sheet body supporting object,
In particular, the present invention relates to a stencil sheet provided with a locking opening for locking to a rotary press drum of a rotary mimeograph machine.

For example, when removably locking one end of a stencil sheet to the drum of a rotary press, a locking device for locking the sheet body is provided on one object, and an engaging opening is provided on the side of the sheet body. It is conventional practice to engage the locking device and the engagement opening with each other. Various types of locking structures including such locking devices and engagement openings have already been proposed and used.

One of these known locking structures includes a columnar body that projects above the object to which the seat body is attached;
a hole formed in the sheet body to have a contour corresponding to the cross-sectional shape of the columnar body, and by engaging the sheet body with the columnar body at the hole portion, the sheet body carrying object and the sheet body are separated. The connection between the two is now being made. Such a sheet body locking structure does not cause any deformation around the hole in the sheet body by simply seating the sheet body on the sheet body supporting object by inserting the columnar body into the hole formed in the sheet body. The sheet body is attached to the sheet body carrying object so as not to cause any relative displacement in the direction along the surface of the sheet body between the sheet body carrying object and the sheet body after the sheet body is attached. However, in this case, the hole in the sheet body can move freely in the direction along the axis of the columnar body, so the hole in the sheet body can be inadvertently dislodged from the columnar body. However, there is a drawback that the sheet body is more likely to fall off than the sheet body supporting object.

In view of the above-mentioned drawbacks of the seat body locking structure based on the simple engagement between a columnar body and a hole,
The columnar body protruding from the sheet-carrying object is provided with a head larger than the diameter of the columnar part, and the hole provided in the sheet body is a hole with a size approximately equal to the diameter of the columnar part, and the hole is filled with the above-mentioned head. When passing through the headed column, the head causes a semi-elastic and semi-plastic deformation around the hole in the sheet body, and once the head passes through the hole in the sheet body, the sheet deforms. A locking structure that makes it more difficult for the hole in the body to fall off than the headed columnar body has been proposed and used as another sheet body locking structure. Once the second sheet body locking structure is locked as described above,
This has the advantage that the risk of the sheet body inadvertently falling off from the sheet-carrying object is greatly reduced; Because of that,
The deformation resistance is quite large, and the operation of locking the sheet body to the sheet body supporting object is quite troublesome.
Furthermore, since the sheet body is plastically deformed three-dimensionally around the hole, there is a risk that the sheet body will become weakened at the peripheral edge of the hole, and that the sheet body will break from that area.

Furthermore, as a third known locking structure, a columnar body with a head is used as the locking device provided on the sheet supporting object side as in the second locking structure,
On the other hand, a portion of the hole provided in the sheet body is large enough to allow the head of the headed columnar body to pass through easily, and a columnar portion of the headed columnar body is connected to one side of the hole. The large diameter part of the keyhole-shaped hole is configured as a keyhole-shaped hole including a notch groove with a width that exactly engages with the sheet body, and when the sheet body is locked to the sheet body supporting object, the large diameter part of the keyhole-shaped hole The small diameter portion of the keyhole-like hole is engaged with the columnar portion of the headed columnar body by slightly displacing the sheet body along its surface relative to the sheet-carrying object, and this Accordingly, there is a device in which the small diameter portion of the hole is engaged with the jaw portion of the head of the headed columnar body to prevent the sheet body from accidentally falling off from the sheet body supporting object. Such a locking structure has the advantage of being able to more reliably lock the sheet body to the object supporting the sheet body without causing any deformation of the sheet body during the locking operation. In operation, it is necessary to displace the sheet body relative to the sheet-carrying object in a direction along its surface, and in some cases, such an operation makes the work of attaching the sheet body to the sheet-carrying object quite complicated. This causes a problem.

In view of the above-mentioned problems in the various known sheet body locking structures, the present invention has been developed to simply bring the sheet body close to the sheet body supporting object without causing three-dimensional deformation of the sheet body. Alternatively, by performing a simple operation of pulling the sheet body away from the object, it is possible to lock the sheet body to or detach it from the sheet body supporting object, and by such a simple operation, the sheet body Once the sheet body is locked to an object, it strongly prevents the sheet body from accidentally falling off from the object carrying the sheet body, and when the sheet body is locked, the sheet body follows the surface of the object carrying the sheet body. An improved sheet body locking structure capable of completely eliminating play such as directional displacement is provided, particularly as a stencil sheet locking structure in a rotary mimeograph printing machine, and in particular, such a locking structure is provided. It is an object of the present invention to provide a stencil sheet having a reinforcement section with engagement openings to achieve the objective.

According to the present invention, this purpose is to provide a hook-shaped projection consisting of a columnar part protruding from the stencil sheet attachment part of the rotary press drum and an arm extending to one side from the tip of the columnar part. In order to engage with a stencil sheet locking device having a pair of portions facing each other, two holes engaging the pair of columnar portions and a pair of holes extending in directions facing each other from the holes are provided. The stencil sheet has a reinforcing part having a pair of engagement openings including a slit, and the engagement of the locking device with the engagement opening is such that the arm part is at the corner where the slit and the hole of the reinforcing part intersect. This is achieved by a stencil sheet having an engaging opening for a rotary copying machine, characterized in that the stencil sheet passes through the engaging opening while bending the portion along the .

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

The attached FIG. 1 is a plan view showing the locking part of the stencil sheet to the drum in a rotary press incorporating one embodiment of the sheet body locking structure based on the present invention, and FIG. FIG. In these figures, 1 is a drum of a rotary press, and 2 is a stencil sheet attached to the drum. The drum 1 has a sheet attachment part 3, and the sheet attachment part is provided with two types of sheet retention devices 4 and 5 as sheet body retention devices in this embodiment. Of these seat locking devices, 4 in particular is relevant to the present invention; the other type of seat locking device 5 is simply a cylindrical cylindrical device protruding from the seat mounting portion 3 substantially perpendicular to its surface. Department. The seat 2 has along one edge thereof a reinforcement 6 which is provided with engagement openings 7 and 8 which correspond to and engage the seat locking devices 4 and 5. In this case too, the engagement opening 8 that engages the seat locking device 5 is simply a circular hole with a diameter that just engages the cylindrical surface of the seat locking device 5.

3 is an enlarged cross-sectional view taken along line - in FIG. 1, and FIG. 4 is a cross-sectional view taken along line - in FIG. As is clear from these figures, the seat locking device 4 includes a columnar portion 9 projecting from the seat attachment portion 3 and an arm portion 1 extending to one side from the tip of the columnar portion 9.
It is a hook-shaped element with 0 and 0. Figures 3 and 4
In the embodiment shown in the figure, both the columnar portion 9 and the arm portion 10 are configured to have a circular cross section.

The engagement opening 7 provided in the sheet 2 includes a hole 11 that engages with the columnar portion 9 and a slit 12 that extends from the hole 11 to one side. In this embodiment, corresponding to the fact that the columnar part 9 of the sheet locking device 4 is configured to have a circular cross section, the hole 11 is configured as a circular hole, and its diameter is equal to that of the columnar section. Preferably, the diameter is the same as or slightly larger than the diameter of the portion 9.
The slit 12 is formed to be somewhat longer than the arm portion 10, and a tear-preventing small hole 13 is provided at the tip of the slit 12.
is formed.

Seat locking device 4 shown in FIGS. 3 and 4
3 and 4 for the drum 1 of a rotary press having
To attach the stencil sheet 2 having the engagement opening 7 as shown in the figure, the stencil sheet 2
The reinforcing part 6 is superimposed on the seat attachment part 3, and the sheet 2 is pressed toward the seat attachment part 3 around the locking device 4 so that the locking device 4 fits into the engagement opening 7. Good. Due to the pressing action of the sheet, the arm portion 10 of the locking device 4 pushes open the sheet pieces 14 formed on both sides of the slit 12 of the engagement opening 7, and enters the push-open portion. I'm coming. In this case, the sheet pieces 14 are curved approximately two-dimensionally along straight lines indicated by reference numerals 15 to 18 in the drawings, respectively. When the sheet piece 14 is curved almost two-dimensionally along a straight line in this way, the sheet piece 2 hardly undergoes three-dimensional plastic deformation, and the sheet piece 2 is simply two-dimensionally and almost two-dimensionally bent. Deforms elastically. Therefore, under the secondary deformation of the sheet piece 14, the arm portion 10 of the sheet locking device 4
passes between them, the sheet piece 14 is able to return to its original position again due to its elasticity, and thus after the engagement opening 7 engages the sheet locking device 4, the sheet 2 remains in its original position. The hole 11 simply engages with the columnar portion 9 of the sheet locking device 4. In this state, the seat 2 is held by the locking member 4.
Against the force that tries to pull apart the sheet piece 1
4 resists this by its own resilience and prevents the sheet from being inadvertently dislodged from the sheet carrying device, such as the drum 1.

The locking devices 4 may be provided in pairs, and in this case, it is preferable that the arms 10 extend in opposite directions. In this case, the columnar part 9 of the locking device 4 on the right side in the figure
The sheet is prevented from moving to the left along the sheet surface with respect to the drum by engagement with the hole 11,
Furthermore, the sheet is prevented from moving in the right direction in the figure along the sheet surface with respect to the drum by the engagement between the columnar part 9 of the locking device 4 on the left side in the figure and the hole 11, and the two columnar parts 9 The engagement of the holes 11 and 11 prevents the sheet from moving vertically relative to the drum along the sheet surface, thereby stably holding the sheet despite tensile forces in all directions.

FIG. 5 is a view showing one modification of the engagement opening of the seat shown in FIG. 4. In this modified example, the width of the slit 12 is increased. By increasing the width of the slit 12 in this manner, the sheet can be more easily attached to the sheet locking device 4. However, it also becomes easier for the seat to detach from the seat locking device 4, but if the degree of detachment is such that it does not pose a problem when the seat is actually used, the seat can be more easily attached. For this purpose, it is overall advantageous to increase the width of the slit 12 in this way.

FIG. 6 is a diagram showing still another modification of the engagement opening of the seat. In this modified example, a slit 19 is provided at one end of the slit 12 and extends in a direction perpendicular to the direction in which the slit 12 extends. The length of this slit 19 is the same as that of the hole 11.
It is good that the diameter is approximately equal to the diameter of the Further, the length of the slit 12 may be approximately equal to the length of the arm portion 10 of the locking device 4.

In this case, the sheet pieces 14 formed on both sides of the slit 12 move along a straight line substantially parallel to the direction of extension of the slit 12 as the arm 10 of the locking device 4 enters the slit 12. It curves two-dimensionally more smoothly while gradually widening the width of the curved portion, and at this time, no three-dimensional plastic deformation occurs.

FIG. 7 further shows one modification of the engagement opening of the seat shown in FIG. 6. In this modification, another slit 19 is provided near the end of slit 12. In this case, sheet pieces 14 and 14' are formed on both sides of the slit 12, of which sheet piece 14 is curved like sheet piece 14 in the embodiment shown in FIG. 4, the sheet piece 14' is curved two-dimensionally along a straight line as indicated by the numeral 20 in the figure. Therefore, even in this modified example, the sheet pieces 14, 14' do not undergo any three-dimensional plastic deformation when the arm portion 10 enters.

In the above-described embodiment, the cross-sectional shape of the locking device 4 is circular, but the cross-sectional shape of the locking device 4 may be an ellipse, a quadrilateral, a triangle, or a combination thereof. The engagement openings of the seats attached to the locking devices having such a cross-sectional shape are naturally provided with correspondingly oval, square or triangular holes. Further, the locking devices provided in pairs may be configured such that the cross-sectional shapes of the respective columnar portions are different from each other or are asymmetrical from each other. In this case, there is an advantage that an erroneous operation such as erroneously attaching the sheet upside down can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is an illustrative plan view showing the locking portion of a stencil sheet to the drum of a rotary press incorporating one embodiment of the sheet body locking structure based on the present invention;
3 is an enlarged sectional view taken along the line 1 in FIG. 1, 4 is a sectional view taken along the line 3 in FIG. FIG. 6 is a plan view showing an engagement opening of a sheet that engages with a locking member that has been opened. DESCRIPTION OF SYMBOLS 1... Drum of rotary press, 2... Stencil sheet, 3... Sheet attachment part, 4, 5... Sheet locking device, 6... Reinforcement part, 7, 8... Engagement opening, 9...
... Column, 10... Arm, 11... Hole, 12...
Slit, 13... Small hole, 14... Sheet piece, 1
5-18... line, 19... slit, 20...
line.

Claims (1)

[Scope of utility model registration request] A pair of hook-shaped protrusions consisting of a columnar part protruding from the stencil sheet attachment part of the rotary press drum and an arm part extending to one side from the tip of the columnar part with the arm parts facing each other. A pair of engagement openings including two holes that engage with the pair of columnar parts and a pair of slits that extend from the holes in mutually opposing directions in order to engage with the stencil sheet locking device having a The locking device is engaged with the engagement opening by bending a portion of the reinforcing portion along the corner where the slit and the hole intersect. 1. A stencil sheet provided with an engagement opening for a rotary mimeograph machine, characterized in that the stencil sheet is engaged by passing through the opening.