JPH0687355U - Switching device for the transfer belt position - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the switching work for paper and keep the tension of the conveyor belt constant. [Structure] By rotating the lever 41, the first pin 49
Alternatively, the second pin 51 is fitted into the first positioning hole 52 or the second positioning hole 53, the position of the rotating arm that applies tension to the conveyor belt is fixed at a predetermined position, and the lever is rotated to rotate. The arm is held at a predetermined rotation fixed position to facilitate the switching work to the paper and keep the tension of the conveyor belt constant.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for switching a paper-addressing position of a conveyor belt provided on, for example, a theta of a printing machine.

[0002]

[Prior art]

 The conveyor belt provided on the theta will be described with reference to FIGS. 6 and 7. FIG. 6 shows the side surface of the conveyor belt as seen from the inside of the driving side frame, and FIG. 7 shows the outside side surface of the driving side frame.

As shown in FIG. 6, after printing, the printing paper which is dried and cooled and then sent is discharged by the sheet 1. A conveyor belt 2 is arranged on the theta 1, and the conveyor belt 2 is stretched around a fixed roll 3, a movable roll 4 and a tension roll 5. The moving roll 4 is reciprocally movable in the printing paper conveyance direction (left-right direction in the drawing), and the moving roll 4 is provided with a paper cover 6. The tension roll 5 is supported by the tip of a rotating arm 7, and the rotating arm 7 has a base end side attached to a rotating shaft 8.

When the size of the printing paper is changed, the paper address 6 is moved by the paper address position switching device. That is, the moving roll 4 is moved according to the size of the printing paper, the printing paper is brought into contact with the paper contact 6 and is discharged to a predetermined position. For example, in the case of B3 size printing paper, as shown by the solid line in the figure, the moving roll 4 is moved to the right and the rotating arm 7 is rotated downward to apply tension to the conveyor belt 2 by the tension roll 5. . Further, for example, in the case of B4 size printing paper, as shown by the chain double-dashed line in the figure, the moving roll 4 is moved to the left and the rotating arm 7 is rotated upward to move the tension roll 5 and the idle roller. Tension is applied to the conveyor belt 2 by 9.

As shown in FIG. 7, the turning arm 7 is turned by turning a lever 10. In the case of B3 size, the lever 10 is rotated upward as shown by the solid line in the figure, and in the case of B4 size, the lever 10 is rotated downward as shown by the chain double-dashed line in the figure. The moving position, that is, the position of the rotating arm 7 is fixed by the clamp lever 11.

A moving mechanism of the moving roll 4 will be described with reference to FIGS. 8 to 11. 8 is a plan view of the moving mechanism, FIG. 9 is a view taken along the line IX-IX in FIG. 8, FIG. 10 is a view taken along the line XX in FIG. 8, and FIG. 11 is a line XI-XI in FIG. A line-arrow view is shown.

Rails 22 are respectively provided on the pair of frames 21 of the theta 1 along the conveyance direction of the printing paper, and a bracket 23 is movably supported on each rail 22. The brackets 23 support the paper contact bar 24 and the ends of the roller lever 25, and the paper contact bar 24 is rotatable about its axis. Brackets 26 are fixed at four locations in the axial direction of the paper contact bar 24, and the paper contact 6 is attached to the bracket 26 (see FIG. 9). Tension rolls 27 are attached to the roller lever 25 at two axial positions, and the tension roll 27 supports the moving roll 4 via an arm 28. That is, by moving the bracket 23 along the rail 22, the moving roll 4 and the paper pad 6 move.

As shown in FIG. 10, a lever 29 is fixed to the paper cover bar 24, and the lever 29 is urged to rotate in the S direction by a spring (compression spring) 30. As shown in FIG. 8, a handle 31 is attached to the paper contact bar 24, and the lever 29 is rotated against the biasing force of the spring 30 by rotating the paper contact bar 24 with the handle 31. As a result, the paper tray 6 is rotated to allow only desired printing paper to pass therethrough for inspection and the like.

As shown in FIG. 10, the rail 22 is provided with a reference hole 32 for positioning, and as shown in FIG. 11, by inserting a pin 34 urged by a spring 33 provided in the bracket 23, , The positions of the moving roll 4 and the paper cover 6 are fixed. The moving ends of the moving roll 4 and the paper cover 6 are detected by detecting the bracket 23 with a limit switch (not shown).

A switching operation of the position of the paper cover 6 on the above-described transport belt 2 will be described. For example, a case of changing from B3 size printing paper to B4 size printing paper will be described.

The pin 34 shown in FIG. 11 is removed from the reference hole 32, and the bracket 23 is moved along the rail 22 to move the moving roll 4 and the paper tray 6 to a predetermined position shown by a chain double-dashed line in FIG. Then, the pin 34 is fitted into the reference hole 32 and the positions of the moving roll 4 and the paper pad 6 are fixed. As shown by the chain double-dashed line in FIG. 6, the conveyor belt 2 is wound around the tension roll 27 and the idle roller 9, the clamp lever 11 shown in FIG. 7 is loosened, and the lever 10 is moved as shown by the chain double-dashed line in the figure. Rotate downward. When the lever 10 is rotated downward, the rotating arm 7 is rotated upward as shown by a chain double-dashed line in FIG. 6, and tension is applied to the conveyor belt 2 by the tension roll 5. After adjusting to a predetermined tension, the position of the lever 10 is fixed by the clamp lever 11 shown in FIG.

When changing from the B4 size printing paper to the B3 size printing paper, contrary to the above, the lever 10 is rotated upward to return the tension roll 5 to the lower side, and the conveyor belt 2 is removed from the idle roller 9. Then, the moving roll 4 and the paper cover 6 are moved to the position shown by the solid line in FIG. 6 and fixed at a predetermined position. After the tension of the conveyor belt 2 is adjusted by the lever 10, the clamp lever 11 fixes the position of the lever 10.

[0013]

[Problems to be solved by the device]

 In the above-described paper-applying position switching device, the lever 10 is rotated to adjust the tension of the conveyor belt 2, and the clamp lever 11 fixes the lever 10 to fix the tension of the conveyor belt 2. For this reason, it is necessary to adjust the tension with the lever 10 and fix the tension with the clamp lever 11 every time the size of the printing paper is changed, and it is very troublesome to switch the paper position. . Further, the fixing position of the lever 10 by the clamp lever 11 varies depending on the operator, and the tension of the conveyor belt 2 varies, which may result in an inappropriate tension.

[0014]

[Means for Solving the Problems]

 The configuration of the present invention for solving the above-mentioned problems is achieved by a movable roll that winds around a conveyor belt at the front end in the conveying direction and is movable in the conveying direction, a paper cover provided on the movable roll side, and a tip of a rotating arm. In the paper-applying position switching device of the transport belt, which is provided with a tension roll that applies tension to the transport belt by stopping the rotation of the rotation arm according to the movement position of the movement roll, the rotation of the rotation arm Positioning holes provided corresponding to the motion stop position, and position fixing pins that are provided on the rotation arm side and that fit into the positioning holes at the rotation stop position of the rotation arm and hold the rotation arm at the rotation stop position. It is characterized by having.

[0015]

[Action]

 By rotating the rotating arm, the position fixing pin fits into the positioning hole and the rotating arm is held at the rotation stop position at the position where the tension roll applies tension to the conveyor belt with a predetermined tension. When changing the moving position of the paper, the position fixing pin is pulled out from the positioning hole and the rotating arm is rotated, and the position fixing pin is again positioned at the position where the tension roll applies a predetermined tension to the transport belt. And the rotation arm is held at the rotation stop position. Even if the moving position of the paper is changed, the rotating arm is held at the predetermined rotation stop position.

[0016]

【Example】

 FIG. 1 is a side view of a paper-applying position switching device according to an embodiment of the present invention viewed from the outside of the frame, FIG. 2 is an enlarged state in the case of a B3 size, FIG. 3 is a developed sectional view in FIG. 2, and FIG. 5 shows an enlarged state in the case of B4 size, and FIG. 5 shows a developed cross section in FIG. The lever 41 shown in FIGS. 3 and 4 corresponds to the lever 10 shown in FIG. 7, and the rotating arm 7 in FIG. 6 is vertically rotated by the lever 41, and the tension belt 5 is rotated by the tension roll 5. Since the tension is applied to the paper tray, and the moving mechanism of the paper tray 6 and the like are the same as those shown in FIGS. 6 to 11, duplicate description will be omitted.

A lever 41 is fixed to the rotation center shaft 42 of the rotation arm 7, and the rotation arm 7 (FIG. 6) is rotated by the lever 41 via the rotation center shaft 42. A base plate 43 is fixed to the frame 21 with the rotation center shaft 42 penetrating therethrough, and the first plate 45 is attached to the side surface of the base plate 43 through an elongated hole 44 concentric with the rotation center shaft 42. Has been. The center of the first plate 45 is an inner diameter portion 45a having a diameter larger than that of the rotation center shaft 42, and the first plate 45 is rotated with respect to the base plate 43 within the range of the elongated hole 44. A second plate 46 is attached to the base plate 43 so that the rotation center shaft 42 penetrates and the shaft portion 46a is rotatably fitted to the inner diameter portion 45a of the first plate 45. Reference numeral 46 is in sliding contact with the side surface of the first plate 45. The outer periphery of the second plate 46 is formed smaller than the first plate 45.

A rotation plate 47 is fixed to the rotation center shaft 42 outside the second plate 46 by splitting, and the outer peripheral side of the rotation plate 47 faces the first plate 45. The second plate 46 faces the second plate 46. A first pin 49 as a position fixing pin that is biased toward the first plate 45 via the first spring 48 is provided on the outer peripheral side of the rotating plate 47, and the center of rotation of the rotating plate 47 is provided. A second pin 51 is provided near the shaft 42 as a position fixing pin that is urged toward the second plate 46 via the second spring 50.

As shown in FIG. 4, the first plate 45 is provided with a first positioning hole 52. As shown in FIG. 2, when the lever 41 is rotated upward to rotate the rotating plate 47, The first pin 49 is fitted into the first positioning hole 52 by the urging force of the first spring 48 (see FIG. 3). In this state, the rotation stop position of the rotation arm 7 is fixed to the position of B3 size shown by the solid line in FIG. 6, and the predetermined tension is applied to the conveyor belt 2.

As shown in FIG. 2, a second positioning hole 53 is provided in the second plate 46, and as shown in FIG. 4, when the lever 41 is rotated downward to rotate the rotating plate 47, The second pin 51 is fitted into the second positioning hole 53 by the urging force of the second spring 50 (see FIG. 5). In this state, the rotation stop position of the rotation arm 7 is fixed to the position of B4 size shown by the chain double-dashed line in FIG. 6, and a predetermined tension is applied to the conveyor belt 2.

By providing a plurality of plates or positioning holes, the rotating arm 7 can be fixed at a plurality of rotation stop positions other than the above-mentioned two positions, and the conveyor belt 2 at a plurality of size positions can be fixed. A predetermined tension can be applied.

The operation of the above-described paper-addressing position switching device will be described.

When the paper tray 6 is positioned at the B3 size position shown by the solid line in FIG. 6, the lever 41 is at the upper position shown in FIGS. 2 and 3, and the first pin 49 is at the first position. The rotary arm 7 is fitted in the predetermined hole 52 and is held at the lower rotary stop position.

When changing from this state to the position of B4 size shown by the chain double-dashed line in FIG. 6, the movable roll 4 and the paper cover 6 are moved to a predetermined position for positioning (details are shown in FIGS. 8 to 1). 1). The first pin 49 in the state shown in FIGS. 2 and 3 is removed from the first positioning hole 52 against the biasing force of the first spring 48, and the lever 41 is rotated counterclockwise in FIG. When the lever 41 is at the lower position in FIG. 4, the second pin 51 provided on the rotating plate 47 is fitted into the second position determining hole 53 by the urging force of the second spring 50, as shown in FIG. Then, the rotation arm 7 is held at the rotation stop position in which the rotation arm 7 is rotated upward. In this state, a predetermined tension is applied to the conveyor belt 2 when the paper cover 6 is positioned at the B4 size position.

On the contrary, when the paper contact 6 is moved from the position of B4 size to the position of B3 size, the second pin 51 is removed from the second positioning hole 53 against the biasing force of the second spring 50. 4 Rotate the lever 41 in the clockwise direction. When the lever 41 moves to the upper position in FIG. 2, the first pin 49 provided on the rotating plate 47 is fitted into the first positioning hole 52 by the urging force of the first spring 48, as shown in FIG. Then, the rotating arm 7 is held at the lower rotation stop position. In this state, a predetermined tension is applied to the conveyor belt 2 when the paper cover 6 is positioned at the B3 size position.

The rotation position of the first plate 45 can be changed within the range of the elongated hole 44, and the first plate 45 is rotated when the tension of the transport belt 2 is changed.

In the above-described paper-applying position switching device, the first pin 49 or the second pin 51 is fitted into the first positioning hole 52 or the second positioning hole 53 by rotating the lever 41, and the conveyor belt 2 Since the position of the rotating arm 7 that applies a tension to the fixed arm is fixed at a predetermined position, the operator only removes the first pin 49 or the second pin 51 and rotates the lever 41. The tension roll 5) can be held at a predetermined rotation stop position. Therefore, the work of changing the paper cover 6 is simplified, and the tension of the conveyor belt 2 can be kept constant.

[0028]

[Effect of device]

 The transfer belt position changing device of the present invention has a positioning hole corresponding to the rotation stop position of the rotating arm, and a position fixing pin that is biased toward the positioning hole. The rotation stop position of the rotation arm that applies tension to the conveyor belt when the paper cover is switched when is fitted into the positioning hole is fixed. The rotation arm can be held at a predetermined rotation stop position only by performing the above operation. As a result, the switching work for the paper is facilitated, and even if the position of the paper is switched, the tension of the conveyor belt is not varied and the tension is always maintained at an appropriate level.

[Brief description of drawings]

FIG. 1 is a side view of a paper-addressing position switching device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of B3 size.

FIG. 3 is a developed sectional view of FIG.

FIG. 4 is an enlarged view of B4 size.

5 is a developed sectional view of FIG.

FIG. 6 is a side view of a conveyor belt.

FIG. 7 is a side view of a conventional switching device.

FIG. 8 is a plan view of a moving mechanism.

9 is a view taken along the line IX-IX in FIG.

10 is a view taken along the line XX in FIG.

11 is a view taken along the line XI-XI in FIG.

[Explanation of symbols]

 2 Conveyor Belt 4 Moving Roll 6 Paper Cover 7 Rotating Arm 41 Lever 42 Rotating Center Shaft 43 Base Plate 45 First Plate 46 Second Plate 47 Rotating Plate 48 First Spring 49 First Pin 50 Second Spring 51 Second Pin 52 First Positioning Hole 53 Second Positioning Hole

Claims (1)

[Scope of utility model registration request] 1. A movable roll which winds a conveyor belt at the front end in the conveying direction and is movable along the conveying direction, a paper cover provided on the movable roll side, and a moving position of the movable roll supported by the tip of a rotating arm. In a paper-belt position changing device for a conveyor belt, which is provided with a tension roll that applies tension to the conveyor belt by stopping the rotation of the rotating arm accordingly, positioning provided corresponding to the rotation stop position of the rotating arm. A conveyor belt comprising a hole and a position fixing pin which is provided on the rotating arm side and is fitted into the positioning hole at the rotation stop position of the rotation arm to hold the rotation arm at the rotation stop position. Position switching device.