JP2970099B2 - Sheet-like object holding device for cylindrical torso surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-like object holding device installed on a cylindrical body surface. More particularly, the present invention relates to a sheet-like object holding device installed on a cylindrical body surface, which can easily attach and detach a sheet-like object and can maintain a uniform tension even if the sheet-like object expands and contracts.

[0002]

2. Description of the Related Art In recent years, an image forming material having a photosensitive layer coated on one side of a support is image-exposed, and then the image formed on the photosensitive layer is generally heated, for example, on paper or the like. A single-color or multi-color prepress proof suitable for proof printing or the like transferred to an image receptor has been produced.

[0003] When an image receptor such as paper is heated in advance, and a photosensitive layer of an image forming material is pressed against the image receptor to transfer an image formed on the photosensitive layer onto paper, the image is formed on one sheet of paper. 4
In the case of color printing, images of four colors are transferred in an overlapping manner. In this case, if the paper expands or contracts due to the temperature or the like, misregistration occurs in the overprinted second and subsequent images, and a beautiful printed matter suitable for the purpose of proof printing cannot be obtained.

As an apparatus for preparing the prepress proof, an impression cylinder having an image forming material attached thereto and a transfer cylinder having an image receptor attached thereto are arranged such that a photosensitive layer of the image forming material and the image receptor are opposed to each other. An apparatus has been generally proposed in which both cylinders are contact-pressed and an image formed on a photosensitive layer is transferred to an image receptor at a nip between the cylinders. In such an apparatus, as a device for mounting an image receptor such as paper on a transfer cylinder, a conventional sheet-like material, for example, a sheet-like material such as paper which expands and contracts depending on the amount of water contained therein can be easily attached and detached, and always has a constant tension. There has been a strong need for the development of a device that holds under the pressure, but a device that satisfies such a desire has not yet been developed.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an apparatus having a cylindrical body, such as an apparatus for producing a prepress proof, which is capable of maintaining a uniform tension on a sheet-like material such as an image receptor, which is likely to expand and contract. It is an object of the present invention to provide a sheet-like object holding device which can be adjusted to a correction tension value even if there is expansion and contraction, and which can easily attach and detach the sheet-like object.

[0006]

According to the present invention, there is provided a holding device for holding the upper side and the lower side of a sheet-like material on the surface of a cylindrical body over the entire width direction. An upper side holding member, a lower side holding member, and an operating lever for operating the upper side holding member and the lower side holding member, wherein the upper side holding member extends over the entire length of the cylindrical body; An elastic member for pulling the sheet receiving portion toward the body surface side, and a claw portion rotatably mounted on an end surface of a cylindrical body supporting both ends of the sheet receiving portion; A table-side sheet receiving part having a tool extending over the entire length of the cylindrical body; a first member rotatably mounted on an end surface of the cylindrical body at a central portion attached to both ends of the table-side sheet receiving part; , Holding down the entire length of the cylindrical cylinder facing the table-side sheet receiver A sheet receiving portion, a connecting member for driving the pressing side sheet receiving portion, a second member having a central portion rotatably mounted on a central portion at an end surface of the cylindrical body interlocked with the connecting member, and An elastic member for holding the operation lever side of the second member on the body surface side; a first member and a second member disposed on the operation lever side between the first member and the second member; And an elastic member for interlocking the members of the first and second members, and the operation lever is provided so as to individually press down the claw portion of the upper side holder and the operation lever side of the second member of the lower side holder downward. Holding the operation lever side of the second member on the cylindrical body surface side to make the holding-side sheet receiving portion adhere to the table-side sheet receiving portion, and pressing down the operation lever side of the second member downward. Open between the holding side sheet receiving section and the table side sheet receiving section Providing a holding device for holding the sheet in the cylindrical barrel surface, characterized in that a.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic sectional view showing an upper side holder in the sheet-like object holding apparatus of the present invention. The sheet receiving portion 1 has a length extending over the entire length of the cylindrical body 2, and the sheet receiving portion holds the sheet between the cylindrical body 2 and the surface thereof. Preferably, the cylindrical body surface is partially concave so that the receiving portion does not protrude from the circumferential surface of the cylindrical body. The receiving portion is supported at both ends by a claw portion 4 having a central portion pivotally attached to a fulcrum 3 at an end surface of the cylindrical body. The opposite side of the claw portion 4 from the side on which the sheet receiving portion 1 is attached comes into contact by the rotation of the operation lever 6 rotated around the fulcrum 5, and the claw portion 4 rotates around the fulcrum 3. It is preferable that a roller 18 is provided on the operation lever side of the claw portion 4 to reduce friction between the operation lever 6 and the claw portion 4. The operation levers 6 are provided on both end surfaces of the cylindrical body 2, and both operation levers are connected by a connecting rod (not shown). It is also preferable from the viewpoint of simplicity.
The operation lever 6 may be rotated by the cam 24.
The rotation of the cam 24 may employ any means such as manual operation or electric operation.

An elastic member 7 attached to the sheet receiving portion side of the claw portion 4 presses the sheet receiving portion 1 against the body surface, thereby gripping a sheet-like material, such as paper, between the body surface and the sheet receiving portion. Act like so. In addition, the sheet receiving portion 1 is brought into close contact with the cylindrical body surface by inserting the elastic member 25 into the holes (not shown) provided in the sheet receiving portion 1 and the cylindrical body surface, respectively, in combination with the elastic member 7 or independently. Then, the sheet-like material may be sandwiched. It is preferable to attach a plurality of elastic members 25 in order to make the clamping force in the axial direction uniform.

FIG. 2 is a schematic cross-sectional view showing a lower side holder in the sheet-like object holding apparatus of the present invention. Cylindrical body 2
The table-side seat receiving portion 8 extending over the entire length of
A first member (hereinafter, referred to as an L-shaped claw portion) 9 having a central portion pivotally attached to the body end surface is fixed to both end portions thereof. The claw portion 9 is rotatable around a fulcrum 10 which is a shaft attachment portion. The holding-side sheet receiving portion 11 is installed at a position facing the table-side sheet receiving portion 8 over the entire length of the cylindrical body 2. Connecting members 14 are fixed to both ends of the holding-side sheet receiving portion 11, and a fulcrum 12 of the connecting member 14 is common to a hole (fulcrum) 12 of the table-side sheet receiving portion 8.
About the sheet receiving portion 8. A shaft 15 protrudes from one end of the connecting member 14, and the shaft 15 is pivotally attached to a notch 16 provided in a second member (hereinafter, referred to as an L-shaped lever) 13. The L-shaped lever 13 is pivotally mounted on the end surface of the cylindrical body 2 so as to be rotatable about the fulcrum 10 at the center thereof, and interlocks with the connecting member 14. The fulcrum of the L-shaped lever 13 is the fulcrum 1 of the L-shaped claw 9.
0 and common.

On the operation lever 6 side between the L-shaped claw portion 9 and the L-shaped lever 13, an elastic member 19 having one end fixed to the claw portion 9 and the other end fixed to the lever 13 is provided. When the L-shaped lever 13 is pushed down by the operation lever 6,
The L-shaped claw portion 9 is interlocked with the L-shaped lever 13. The L-shaped claw portion 9 and the L-shaped lever 13 may be linked by connecting the base-side sheet receiving portion 8 and the holding-side sheet receiving portion 11 with an elastic member 25.

FIG. 3 is an explanatory view showing another embodiment of the connecting member 14. As shown in FIG. A pinion gear 22 is installed at one end of the connecting member 14, and the rack gear 21 meshing with the pinion gear is
The L-shaped lever 13 is installed at one end of the L-shaped lever 13 and the L-shaped lever 13 and the connecting member 14 are linked. FIG. 4 is a schematic sectional view showing still another embodiment of the connecting member 14. A pinion gear 22 serving as a connection member is fixed to the holding-side sheet receiving portion 11, and the pinion gear is meshed with a rack gear provided at one end of the L-shaped lever 13, whereby the connection member and the L-shaped lever are engaged.
Link with the character lever.

An elastic member 17 is attached to the L-shaped lever 13 so as to draw the roller 18 side of the lever 13 toward the surface of the body 2 around the fulcrum 10. As the elastic member, a coil spring is preferably employed, but a leaf spring, a laminated leaf spring or the like may be used. It is preferable to provide a roller 18 at the other end of the L-shaped lever 13 so as to reduce friction when the lever 13 is pushed down by the operation lever 6. An elastic member 19 is provided between the lever 13 and the L-shaped claw 9, and the lever 13 and the claw 9 are interlocked via the elastic member. The elastic member 25 may be provided between the table-side sheet receiving portion 8 and the pressing-side sheet receiving portion 11 so that the L-shaped claw portion and the L-shaped lever are linked. The elastic force of the elastic member acts to increase the gripping force of the image receptor between the table-side sheet receiving portion 8 and the holding-side sheet receiving portion 11.
It is preferable that a stopper 20 be provided below the lever 13 on the roller 18 side so that the claw 9 does not rotate beyond a predetermined position.

As shown in FIG. 4, a plurality of holes (not shown) are provided in the table-side sheet receiving portion 8 and the holding-side sheet receiving portion 11 in the axial direction, respectively, and a spring elastic member 25 is provided in the holes. The table-side sheet receiving portion 8 and the holding-side sheet receiving portion 11 may be closely fitted to each other so as to sandwich the sheet. A plurality of elastic members 25 may be attached. Elastic member 2
5 is preferable in that the L-shaped claw portion 9 and the L-shaped lever 13 are interlocked with each other, and also that the holding force in the axial direction is made uniform.

FIG. 5 is a drawing showing another embodiment of the elastic member for interlocking the L-shaped claw portion and the L-shaped lever portion. L
A protruding piece 26 is provided at a lower portion of the U-shaped claw portion 9 on the operation lever side,
In this example, one end of an elastic member 27 is fixed to the protruding piece and the other end is fixed to the L-shaped lever 13. FIG. 6 shows that when the elastic member shown in FIG. 5 is used, the table-side sheet receiving portion 8 and the pressing-side sheet receiving portion 11 move to the operation lever side by pushing down the roller 18 and the table-side sheet An example is shown in which an opening is provided between the receiving portion and the pressing-side sheet receiving portion.

FIG. 7 shows another example of the connecting member 14 for driving the holding-side sheet receiving portion 11 and the table-side sheet receiving portion 8. The connecting member 14 includes a bearing ring 29 provided at least one in each of the table-side sheet receiving portion 8 and the holding-side sheet receiving portion 11 in the axial direction of the body,
A shaft 31 provided with a groove 30 in the axial direction through which the bearing ring 29 is fitted, and a driven means such as a pinion gear 22 mounted at both ends, and at least one recessed portion formed in the holding-side sheet receiving portion. And an elastic member 32 having both ends inserted into the hole and the groove. The elastic member 32 is preferably a wound spring. The bearing ring 29 may be partially provided with a notch.

The operation of the sheet-like material holding device of the present invention will be described below.

FIG. 1 shows a state in which the upper side holder has gripped the sheet-like material 23. When the operation lever 6 is rotated manually or by a cam or the like in the direction of the arrow, the roller 18 attached to the claw portion 4 pushes the roller 18 side of the claw portion 4 around the fulcrum 3 so that the sheet receiving portion 1 moves upward. I do. Here, the upper side of the image receptor 23 is inserted between the receiving portion 1 and the cylindrical body 2, and then the sheet receiving portion 1 is pulled by the elastic member 7 by rotating the operation lever 6 in the direction opposite to the arrow. The image receptor is held between the sheet receiving portion 1 and the torso surface. The sheet-like material 23 may be used together with the elastic member 7 or may be gripped by the elastic member 25 alone. After gripping the image receptor, the cylindrical body 2 is rotated in the direction of the arrow, and the rotation of the cylindrical body 2 is stopped when the lower side of the image receptor comes to the lower side holder.

FIG. 4 shows the table-side sheet receiving portion 8 of the lower side holder.
5 shows a state in which the sheet receiving portion 11 is in close contact with the pressing side sheet receiving portion 11.
At this time, the roller 18 side of the L-shaped lever 13 is pulled upward by the spring 17, and the spring 19 of the L-shaped claw 9 is
Since the side is also pressed downward by the spring 19, the space between the table-side sheet receiving portion 8 and the pressing-side sheet receiving portion 11 is tightly closed.

As shown in FIG. 2, the operating lever 6 is pivoted to the fulcrum 5
Is rotated in the direction of the arrow with the center as the L-shaped lever 1
The roller 18 is rotated down about the fulcrum 10. Then, the L-shaped claw 9 interlocked with the L-shaped lever 13 via the elastic member 19 is lowered to a position corresponding to the stopper 20, and the table-side sheet receiving portion 8 attached to the L-shaped claw 9. Rotates around the fulcrum 10 and moves to the operation lever 6 side. When the lever 13 is further rotated down after the claw portion 9 hits the stopper 20, the notch 16 side of the L-shaped lever 13 rotates around the fulcrum 10 and moves to the operation lever 6 side. Since the shaft 15 side of the connecting member 14 pivotally attached to the notch 16 moves toward the operation lever 6 with the movement of the notch 16, the connecting member 14 rotates about the fulcrum 12 and is connected to the connecting member 14. The pressed-side sheet receiving portion 11 thus rotated and moved upward, and the space between the pressed-side sheet receiving portion 11 and the table-side sheet receiving portion 8 is opened.

An image receptor 23 is inserted between the holding-side sheet receiving portion 11 and the table-side sheet receiving portion 8 in an opened state,
Then, the operation lever 6 is returned to the original position. At this time the following 2
Step operations are performed. In the first stage, that is, while the spring 19 side of the L-shaped claw is pressed downward by the spring 19 and is in contact with the stopper 20, the L-shaped lever 13
Of the operating lever 6 around the fulcrum 10
, The shaft 15 side of the connecting member 14 pivotally attached to the cut 16 moves to the opposite side of the operation lever 6 about the fulcrum 12. As a result, the holding-side sheet receiving portion 11 connected to the connecting member 14 rotates downward, so that the space between the table-side sheet receiving portion 8 and the holding-side sheet receiving portion 11 is closed, and the sheet-like material is gripped. Becomes In the subsequent second step, that is, when the operation lever 6 is further returned, the roller 18 side of the L-shaped lever 13 is lifted upward by the spring 17, and the lever 13 and the claw 9 are linked to each other so that the fulcrum 10 is centered. As the counterclockwise direction rotates. As a result, the table-side sheet receiving portion 8 and the holding-side sheet receiving portion 1
Reference numeral 1 denotes an operation lever 6 with the image receptor 23 interposed therebetween.
, The image receptor 23 is put in tension.

FIGS. 3 and 4 show a case in which a pinion gear 22 is provided on the connecting member 14 and a rack gear 21 is provided on the L-shaped lever 13. The movement of the rack gear causes the pinion gear meshing with the pinion gear to rotate and hold down. The side sheet receiving portion 11 rotates and the space between the pressing side sheet receiving portion 11 and the table side sheet receiving portion 8 opens and closes. A plurality of holes are provided in each of the holding-side sheet receiving portion and the table-side sheet receiving portion in the axial direction, and the elastic member 25 is inserted into the holes, and the holding force of the sheet-like object is reduced by the elastic force of the elastic member. You may make it uniform in an axial direction. The elastic members 25 and 19 are both L
Since it acts so that the character-shaped claw part 9 and the L-shaped lever 13 are interlocked, only one of them may be installed.

FIGS. 5 and 6 show an elastic member 27 fixed to the projection 26 of the L-shaped claw 9 and the L-shaped lever 13.
The case where an L-shaped claw part and an L-shaped lever part are linked is shown. The bolt 28 is adjusted to an appropriate length for setting a relative position between the L-shaped claw portion and the L-shaped lever portion. When the roller 18 is pressed down by an operation lever (not shown), the L-shaped claw portion and the L-shaped lever portion move downward around the fulcrum 10 together, and the pressing side and the base side sheet receiving section move clockwise. Moving. The downward movement of the L-shaped claw is blocked by the stopper 20, and only the L-shaped lever moves further downward. By these movements, the pinion gear 2 meshing with the rack gear 21 attached to the L-shaped lever portion
2 rotates to open between the holding-side sheet receiving portion 11 and the table-side sheet receiving portion 8. The sheet-like material is placed on the table-side sheet receiving portion, and then the pressure applied to the roller 18 by the operation lever is removed, so that the L-shaped claw portion and the L-shaped lever portion return to the positions shown in FIG. The sheet receiving portion closes and moves counterclockwise to apply an appropriate tension to the sheet.

[0024]

According to the present invention, since the sheet-like object is gripped by the force of the elastic member, the sheet-like object can be gripped with a constant force, and the lower-side holding tool is provided along the circumferential direction of the cylindrical body. A sheet-like object holding device capable of applying a certain tension to a sheet-like object for movement is provided. Further, according to the present invention, the sheet-like object can be attached and detached and a certain tension can be applied to the sheet-like object by a simple operation of operating a set of operation levers that may be connected by a connecting rod. Is provided.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an upper side holder.

FIG. 2 is a schematic cross-sectional view of a lower side holder.

FIG. 3 is a schematic cross-sectional view showing another embodiment of the lower side holder.

FIG. 4 is a schematic sectional view showing another embodiment of the lower side holder.

FIG. 5 is a schematic sectional view showing another embodiment of the lower side holding tool.

FIG. 6 is a schematic sectional view showing another embodiment of the lower side holding tool.

FIG. 7 is a partial perspective view showing another embodiment of the connecting member of the lower side holding tool.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet receiving portion 4 claw portion 6 operating lever 7 elastic member 8 table side sheet receiving portion 9 L-shaped claw portion 11 pressing side sheet receiving portion 13 L-shaped lever 17 elastic member 25 elastic member 27 elastic member 31 shaft

Claims (7)

(57) [Claims] 1. A holding device for holding an upper side and a lower side of a sheet material on a cylindrical body surface over an entire region in a width direction, the holding device comprising: an upper side holder for the sheet material on a cylindrical body surface; A side holder, and an operating lever for operating the upper side holder and the lower side holder, wherein the upper side holder has a sheet receiving portion extending over the entire length of the cylindrical body; and An elastic member for pulling the sheet receiving portion, and a claw portion rotatably mounted on an end surface of a cylindrical body supporting both end portions of the sheet receiving portion, wherein the lower side holding tool extends over the entire length of the cylindrical body. A table-side sheet receiving portion, a first member rotatably mounted on an end surface of a cylindrical body at a central portion attached to both ends of the table-side sheet receiving portion, and a table-side sheet receiving portion; A holding-side sheet receiving portion extending over the entire length of the cylindrical cylinder to be pressed; A connecting member for driving the front-side sheet receiving portion, a second member having a central portion rotatably mounted on an end surface of a cylindrical body interlocked with the connecting member, and an operation lever of the second member An elastic member for holding the side on the cylindrical body surface side, and the first member and the second member provided on the operation lever side between the first member and the second member. An elastic member for interlocking the operation lever, wherein the operation lever is installed so as to individually press down the claw portion of the upper side holding tool and the operation lever side of the second member of the lower side holding tool downward . Circle the operation lever side of member 2
Holds the sheet on the holding side by holding it on the surface of the cylindrical body
The second part is brought into close contact with the table-side sheet receiving part, and the second member is operated.
By pressing down the lever side downward,
A sheet-like object holding device having a cylindrical body surface, wherein an opening is provided between a sheet receiving portion and a table-side sheet receiving portion . 2. The sheet holding device according to claim 1, wherein the connecting members are pinion gears provided at both ends of the holding-side sheet receiving portion, and the second member meshes with the pinion gears. A cylindrical body surface sheet holding device having a rack gear. 3. The sheet-like material holding device according to claim 1, wherein the connecting members are provided at both ends of the holding-side sheet receiving portion, one end of which is fixed to the sheet receiving portion, and a pinion at the other end. A device for holding a sheet-like object on a cylindrical body surface, comprising a gear, and a second member having a rack gear meshing with the pinion gear. 4. The sheet-like material holding device according to claim 1, wherein the connecting members are provided at both ends of the holding-side sheet receiving portion, one end of which is fixed to the sheet receiving portion, and the other end of which protrudes. 2. The sheet-like object holding device for a cylindrical body surface according to claim 1, further comprising a shaft provided, and wherein the second member has a cut portion fitted to the projecting shaft. 5. The sheet-like material holding device according to claim 1, wherein the operation lever is turned by a cam to have a cylindrical body surface. 6. The sheet-like material holding device according to claim 1, wherein the elastic member for interlocking the first member and the second member has one end formed on a protruding piece projecting from a lower portion of the first member on the operation lever side. And a sheet-like object holding device having a cylindrical body surface, the other end of which is fixed to a second member. 7. The bearing ring according to claim 1, wherein at least one connecting member is provided in each of the table-side sheet receiving portion and the holding-side sheet receiving portion in the axial direction of the body. A shaft provided with grooves in the axial direction through which the bearing ring is inserted, and a driven means mounted on both ends, and at least one hole and a groove recessed in the holding-side sheet receiving portion, with both ends mounted. A sheet-like object holding device having a cylindrical body surface and an elastic member inserted therein.