JPH0322197Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is installed in a photographic processing machine for printing and developing photographic paper, for example, and is used when transporting a long photographic light-sensitive material. Regarding a guide device for guiding a photographic material, in particular, a guide for transporting a long photographic material, in which the guide width of a guide member for guiding the photographic material can be easily and accurately adjusted according to the width dimension of the photographic material. It is related to the device.

[Prior Art] In a photo processing machine that automatically prints and develops long photographic paper as a long photosensitive material, for example, when processing multiple types of photographic paper with different width dimensions, In addition, it is necessary to change the guide width of the guide member that guides the photographic paper in accordance with the width dimension of the photographic paper.

For this purpose, as shown in FIG. In addition to providing screw cylinders 111a and 111b,
An operating rod 121 with a knob 120 for adjusting the guide width is inserted into each of the moving screw tubes 111a and 111b parallel to the support shaft 112, and the operating rod 121
and one of the moving screw cylinders 111a are connected with a right-handed screw,
A positioning cam 12 is connected to the other moving screw cylinder 111b with a left-hand thread, and has a plurality of positioning notches 126 formed on the outer periphery of a shaft 125 of a gear 124 that meshes with a pinion 123 fixed to the operating rod 121.
7 is fixed, and a positioning roller 128 that can be engaged and detached from each notch 126 is pivotally supported on the tip of a biasing lever 129 that is biased toward a positioning cam 127 by a biasing spring 130. has been used exclusively.

[Problems to be solved by the invention] However, in the conventional guide device described above, as the movement width of the guide pieces 110a and 110b increases, the reduction ratio of the positioning cam 127 also increases, and the diameter of the gear 124 increases. Due to its necessarily large size, the guide device has the unavoidable disadvantage of occupying a large amount of space. In addition, there were other difficulties in that the guide pieces 110a and 110b were misaligned due to rattling caused by the screws and backlash of the gears.

The present invention has been developed in view of the above-mentioned circumstances, and even if the movement width of the guide piece becomes large, the space occupied by the guide device is small, and the distortion due to rattling caused by the gears collapsing can be avoided. The object of the present invention is to provide a guide device for conveying a long photographic material that does not cause such problems.

[Means for Solving the Problems] In order to achieve the above object, the guide device for conveying a long photosensitive material of the present invention has a guide device for conveying a long photosensitive material from a pair of left and right guide pieces that guide both sides of the long photosensitive material. The guide pieces of the guide member are movably supported by an operating rod for adjusting the guide width, and are moved toward and away from each other by rotation of the operating rod, thereby forming a guide for conveying a long photosensitive material. In the guide device for conveying a long photosensitive material, the operating rod has a cylindrical cam having a plurality of positioning recesses formed in a circumferential surface along a spiral direction and is concentric with the operating rod. and a ball holder having a built-in click ball that engages with the positioning recess and a biasing spring that biases the click ball is attached to one of the guide pieces. It is characterized by this.

[Function] The guide device for conveying a long photosensitive material of the present invention is constructed as described above, so when the operating rod is rotated appropriately, the interval between the guide pieces changes and the guide width is adjusted. . Further, the ball holder is moved along the operating rod by one of the guide pieces, and the click balls sequentially engage with the positioning recesses in the process in which the cylindrical cam is rotated by the operating rod. Since the cam is provided with recesses so that it can be positioned at each position corresponding to the width dimension of the photosensitive material, the guide width can be easily and accurately positioned.

[Example] The following is a drawing showing an example in which the guide device for conveying a long photosensitive material of the present invention is used in a photographic processing machine that automatically prints and develops photographic paper. An embodiment of the present invention will be described in detail.

First, FIG. 1 shows the overall configuration of a photo processing machine. In the figure, 1 is a printer section, 2 is a processor section, 3 is a drying section, and 4 is a cutter section.
A long photographic paper P is wound around a roll 5 installed in the printer section 1, and the photographic paper P sent out from the roll 5 is conveyed by conveyance rollers 6 installed at appropriate intervals. During this time, the exposure device 7 provided in the printer section 1 exposes the film to light and prints it, and the processor section 2 performs a development process by immersing it in a developing solution or the like.
It is further dried in a drying section 3, and then cut between each baking surface section by a cutter 8 installed in a cutter section 4.

During this time, in order to convey the photographic paper P accurately without causing any misalignment or meandering, for example, a section A in the printer section 1, a section B between the printer section 1 and the processor section 2, a section inside the cutter section 4, etc. A guide device, which will be described later, is installed in the C section, D section, etc.

These guide devices have a configuration as shown in FIG. That is, in the same figure, 1
0 is a guide member consisting of a pair of left and right guide pieces 10a and 10b that guide both sides of the photographic paper P;
The guide pieces 10a, 10b are movably supported by a support shaft 12. Also, the guide pieces 10a, 1
0b, a moving screw tube 11a, 11b is attached to each moving screw tube 11a, 11b.
b, an operating rod 21 with a knob 20 for adjusting the guide width, which is operated from outside the photoprocessing machine, is connected to the support shaft 12.
The operating rod 21 and one of the moving screw tubes 11a are connected with a right-hand screw, and the other moving screw tube 11b is connected with a left-hand screw, and by rotating the knob 20, Moving screw tubes 11a, 11b
At the same time, the guide pieces 10a and 10b are moved toward and away from each other at a constant speed, so that the guide width of the guide member 10 can be changed.

Next, 30 is a cylindrical cam fixed to the end of the operating rod 21, and the cylindrical cam 30 has a plurality of positioning recesses 31,
... is formed at a position corresponding to the width dimension of the photographic paper P.

40 is a ball holder;
0 is a support rod 41 attached to the guide piece 10a near the cylindrical cam 30 in parallel to the operation rod 21;
A ball holding portion 4 formed at the tip of the support rod 41
2, the lower surface of the ball holding portion 42 is formed into a concave arc surface that fits the circumferential surface of the cylindrical cam 30, and a ball exposure opening (not shown) opened in the lower surface is formed in the concave arc surface. A ball storage hole 43 is formed in the ball holding portion, and within the ball storage hole 43 is a click ball 44 that engages with the positioning recess 31 of the cylindrical cam 30 and urges the click ball 44. A biasing spring 45 is built in, a lid 46 is attached, and the lid 46 is secured with screws 47,...
It is fixed at...

Since the embodiment of the present invention is constructed as described above, when the operating rod 21 is appropriately moved from outside the photoprocessing machine using the knob 20, one of the moving screws connected to the operating rod 21 with a right-handed screw is moved. The distance between the guide pieces 10a and 10b, that is, the guide width, can be changed by the other moving screw cylinder 11b that is connected with the left-hand screw 11a. On the other hand, the ball holder 40 is moved along the operating rod 21 by the guide piece 10a, and the cylindrical cam 30 is moved along the operating rod 21.
1, the click ball 44 is sequentially engaged and disengaged from the positioning recess 31, . . . of the cylindrical cam 30 by the urging of the urging spring 45.
By sensing the resistance when a and 10b come into contact with both sides of the photographic paper P with the fingertip of the knob 20 that rotates the operating rod 21, it is possible to easily and accurately set the required guide width. Summer.

In the above-mentioned embodiment, the guide device for conveying the long photosensitive material of the present invention was used for printing and printing onto photographic paper.
Although the present invention has been described as being used in a developing device, it can also be used as a guide device that is installed in a negative film developing processing device and guides the conveyance of the negative film. Furthermore, as a mechanism for moving the guide pieces 10a, 10b, in addition to the above-mentioned mechanism, a moving screw cylinder 11a is attached to one of the guide pieces 10a and screwed to the operating rod 21.
A and the other guide piece 10b may be configured to be displaced in conjunction with each other by a link mechanism. Further, guide grooves for guiding both sides of the photographic paper P may be formed in the guide pieces 10a and 10b.

[Effects of the invention] As detailed above, the guide device for conveying a long photosensitive material according to the invention is configured such that the guide width of the guide member can be adjusted by rotating the operating rod. , a plurality of positioning recesses formed along a spiral direction on the circumferential surface of the cylindrical cam fixed to the operating rod, and a click built in a ball holder attached to one of the guide pieces constituting the guide member. Since the adjustment position is determined by engaging the balls, even if the movement width of the guide piece becomes large, it can be accommodated, and the space occupied by the guide device is small, and compared to the conventional This has various effects such as preventing the occurrence of distortion due to rattling caused by backlash of the gear, which cannot be avoided in the case of the guide device.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a photographic processing machine equipped with a guide device for conveying a long photosensitive material according to the present invention, and FIG. 2 is an exploded perspective view showing a part of an embodiment of the present invention. FIG. 3 is a perspective view of a conventional guide device. 10... Guide member, 10a, 10b... Guide piece, 11a, 11b... Moving screw tube, 12...
Support shaft, 20...knob, 21...operation rod, 30...
...Cylindrical cam, 31... Positioning recess, 40...
Ball holder, 44... Click ball, 45...
...Biasing spring.

Claims (1)

[Scope of utility model registration request] Each guide piece of the guide member consists of a pair of left and right guide pieces that guide both sides of the long photosensitive material.
It is movably supported on the operating rod for adjusting the guide width.
In the guide device for conveying a long photosensitive material, the operation rods are moved toward and away from each other by rotation to form a guide width for conveying the long photosensitive material, and the operation rod has a circumferential surface. A cylindrical cam having a plurality of positioning recesses formed along the spiral direction is fixed concentrically to the operating rod, and one of the guide pieces has the positioning recesses formed therein. 1. A guide device for conveying a long photographic material, characterized in that a ball holder is attached, which includes a built-in click ball that engages with the click ball and a biasing spring that biases the click ball.