JPH08238748A - Plate frame fixing unit for printer - Google Patents

Abstract

PURPOSE: To simplify the entire printer by simplifying the periphery of a plate frame of the printer and to effectively and smoothly attach or detach a plate frame in a printer by a simple mechanism. CONSTITUTION: Enclosing members 2a, 2b are so disposed as to enclose two opposed frame elements 1a, 1c of a plate frame 1 formed in a square and having a plate 5, a leaf spring 3a is mounted between the upper surface of the element 1a and the lower surface of the upper part of the member 2a, and a leaf spring 3b is mounted between the side of the element 1a and the inner surface of the side of the member 2a. Further, a leaf spring 3c is mounted between the upper surface of the element 1c and the lower surface of the upper part of the member 2b, and a positioning block 6 is mounted between the side of the element 1c and the inner surface of the side of the member 2b. The frame 1 is fixed between the members 2a and 2b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, and more particularly to a printing frame fixing device for a printing press.

[0002]

2. Description of the Related Art Conventionally, a fixing device for a printing press plate frame of this type has a structure as shown in FIGS. 3 (a) and 3 (b).
That is, FIG. 3 (a) is a sectional view of this conventional fixing device, and FIG. 3 (b) is a partial end view seen from the right side of FIG. 3 (a).

As shown in the figure, an air cylinder is conventionally used as a fixing means for fixing the plate frame 11 to an enclosing member 12 having a U-shaped cross section and surrounding one side of the plate frame 11 fixed around the plate 15. 13 is used, and this air cylinder 13
The piston 14 is operated by the above, and the front end surface of the piston 14 is pressed against the surface of the plate frame. The number of the air cylinders 13 was usually 7 to 8.

[0004]

As described above, since 7 to 8 air cylinders 13 are conventionally used as the fixing means for fixing the plate frame 11 to the surrounding member 12, the plate frame 11 is used. There are many large protrusions on the surface (top surface and side surface) of the air cylinder, and it is necessary to perform piping treatment for each air cylinder. Therefore, the number of parts is large and the space volume for disposing the plate frame is considerably large, which makes it difficult to downsize the entire printing apparatus.

The present invention has been made in view of the above-mentioned conventional circumstances, and therefore, an object of the present invention is to solve the above-mentioned problems inherent in the conventional technology and to simplify the periphery of the plate frame portion compactly. Accordingly, it is an object of the present invention to provide a novel plate frame fixing device in a printing device, which enables downsizing of the entire device.

[0006]

In order to achieve the above object, a plate frame fixing device for a printing machine according to the present invention is a cross-sectional plate arranged so as to surround a first frame element constituting a plate frame. A U-shaped first enclosing member, a second enclosing member having a U-shaped cross-section arranged so as to enclose a second frame element facing the first frame element, and the first enclosing member A first leaf spring having both ends fixed to a longitudinal inner wall of the first horizontal element, and a second leaf spring having both ends fixed to a longitudinal inner wall of the vertical element of the first enclosing member; And a third leaf spring having both ends fixed to the inner wall in the longitudinal direction of the first horizontal element of the second surrounding member.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the accompanying drawings with reference to its preferred embodiments.

FIG. 1 is a perspective view showing the appearance of the present invention, and FIG.
2A is a cross-sectional view taken along the line AA ′ of FIG. 1 and viewed in the direction of the arrow, and FIG. 2B is an end view viewed from the right side of FIG. 2A.

Referring to FIGS. 1, 2A and 2B,
The plate frame 11 to which the present invention is applied is formed in, for example, a substantially square shape, and similarly fixes and holds the periphery of the substantially square plate 5. Four frame elements 1a forming the plate frame 11,
Of 1b, 1c, and 1d, for example, a frame element (a first frame element in the claims) 1a and a frame element (a second frame in the claims) that face each other.
In the frame element) 1c, an enclosing member (first enclosing member in the claims) and an enclosing member (second enclosing member in the claims) 2b are arranged so as to enclose the respective frame elements. It is assumed that the enclosing members 2a and 2b are fixed to the printing apparatus main body.

A leaf spring is provided between the upper surface in the longitudinal direction of the frame element 1a of the plate frame 1 and the inner wall in the longitudinal direction of the upper horizontal element (the first horizontal element in the claims) of the enclosing member 2a (the first in the claims).
3a of the leaf spring 3a is interposed, and both ends of the leaf spring 3a are fixed to the horizontal element of the surrounding member 2a by screws 4.

Similarly, a leaf spring is provided between the longitudinal side surface of the frame element 1a of the plate frame 1 and the longitudinal inner wall of the side vertical element (the vertical element in the claims) of the enclosing member 2a (the first in the claims). Two
3b of the leaf spring 3b is interposed, and both ends of the leaf spring 3b are fixed to the vertical element of the surrounding member 2a by screws 4.

Similarly, between the longitudinal upper surface of the frame element 1c of the plate frame 1 and the longitudinal inner wall of the upper horizontal element (the first horizontal element in the claims) of the enclosing member 2b, a leaf spring ( In the claims, a third leaf spring 3c is provided, and the leaf spring 3
Both ends of c are fixed to the horizontal element of the surrounding member 2b by screws 4.

The leaf springs 3a, 3b, 3c are each implemented in the illustrated embodiment by the use of nuts by means of screws 4, but without the use of nuts the leaf springs 3a-3c are tapped. Not only can it be cut and carried out, but it can also be done by rivets. Further, it is possible to form a recess on the surrounding members 2a, 2b so that the heads of the screws 4 are not exposed from the surrounding member.

A positioning block 6 for positioning the plate frame 1 is disposed between the side surface of the plate frame 1 in the longitudinal direction of the frame element 1c and the longitudinal direction of the vertical inner wall of the surrounding member 2b.

One of the major features of the present invention is that the leaf spring 3
a, 3b, 3c structure or shape. That is, the leaf springs 3a to 3c are configured as shown in the drawing, and the surrounding member 2a,
2b contact with the inner wall of 2b at one point except both ends, frame element 1a,
The upper surface or the side surface of 1c is in contact with at two points. This is because the surface or the side surface of each of the frame elements 1a to 1d of the plate frame 1 is slightly higher in the two portions than in the other portions.

[0016]

The present invention is configured as described above, and according to the present invention, since the projections such as a large number of large air cylinders unlike the conventional ones are not exposed around the plate frame, the entire apparatus is It is possible to reduce the size and weight.

Further, according to the present invention, since the fixing mechanism having a simple structure using the plate spring is used, the trowel can be attached / detached to / from the printing device very easily and smoothly, and the plate frame is attached to the printing device. If so, the plate frame is firmly and firmly fixed to the device.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of an embodiment of the present invention.

2A is a sectional view taken along the line AA ′ of FIG. 1 and viewed in the direction of the arrow, and FIG. 2B is an end view taken in the direction of the arrow of FIG.

3A is a sectional view similar to FIG. 2A of the related art, and FIG. 3B is a partial end view seen from the right side of FIG. 3A.

[Explanation of symbols]

 1, 11 ... Plate frame 1a to 1d ... Frame element 2a, 2b, 12 ... Enclosing member 3a, 3b, 3c ... Leaf spring 4 ... Screw 5, 15 ... Plate 6 ... Positioning block 13 ... Air cylinder 14 ... Piston

Claims (4)

[Claims] 1. A first enclosing member having a U-shaped cross section, which is arranged so as to enclose a first frame element which constitutes a plate frame, and a second frame element which faces the first frame element. A second enclosing member having a U-shaped cross-section arranged so as to enclose; a first leaf spring having both ends fixed to the inner wall in the longitudinal direction of the first horizontal element of the first enclosing member; A second leaf spring fixed at both ends to a longitudinal inner wall of the vertical element of the first enclosure member and a third leaf plate fixed at both ends to a longitudinal inner wall of the first horizontal element of the second enclosure member A plate frame fixing device for a printing press, comprising a spring. 2. The first leaf spring makes contact with the upper surface of the first frame element at two points, and the second leaf spring makes contact with the side surface of the first frame element at two points. The plate frame fixing device for a printing press according to claim 1, wherein the third leaf spring is in contact with the upper surface of the second frame element at two points. 3. The positioning block for adjusting the position of the plate frame is provided on the inner wall in the longitudinal direction of the vertical element of the second surrounding member, and the positioning block is further arranged. The plate frame fixing device for the printing machine described. 4. The printing machine according to claim 1, further comprising fixing the first leaf spring, the second leaf spring and the third leaf spring with screws. Frame fixing device.