JPH02125244A - Cassette holder - Google Patents

Abstract

PURPOSE:To prevent the sudden popping out of a film cassette when it is detached by minimizing difference in operating force for loading, which results from difference in size of a film cassette. CONSTITUTION:The connection of a spring 19 with the running pulley 17 reduces the amount of expansion of the spring for the amount of the movement of a receiving tool 4, thereby reducing difference in the operating force for loading, which results from difference in size of a loaded film cassette F.C. When the lock of the F.C. by a locking tool 11 is released, the receiving tool 4 tends to move, by means of the tension of the spring, in a direction to push the F.C. outward. At the same time, the spring 19 tends to contract and pulls a wire 30 through the running pulley 17; however, in this case, wired drums 15 and 16 are set not to rotate. Since blakes are applied in the contraction of the spring 19 by virtue of the frictional force generated between the wire and the drum, the spring is prevented from instantly contracting and the F.C. is also prevented from suddenly popping out of a cassette holder.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cassette holder device with an improved film cassette holding mechanism.

[Conventional technology]

The cassette holder device loads and holds a film cassette, transports it from the shooting preparation position to the shooting position, and transports it from the shooting preparation position to the shooting position.
A: This is for taking pictures.

A conventional cassette holder device, as described in Japanese Patent Application Laid-Open No. 58Q838, is provided with a pair of clamping frames that move symmetrically with respect to the center of X-ray imaging, and is also equipped with a spring. The film cassette is held in the cassette holder device by moving the film cassette until it touches the side surface of the film, pushing the film cassette further against the force of the spring, and locking the rear end of the film cassette with the locking tool. It had become.

[Problem to be solved by the invention]

By the way, X#! Film cassettes for photography have inch dimensions of 14 (vertical) x 14 (horizontal), 11 x 14° 1QX.
There are various sizes such as 12.8×10.

In conventional cassette holder devices, the amount of change in the spring varies depending on the size of the film cassette to be loaded. In addition to poor operability during loading, such as the large difference in the loading operation force required for loading, the loaded film cassette is always subjected to a force that tries to pop it out of the cassette holder device due to spring tension. Therefore, when the film cassette is removed, there is a problem in that the film cassette suddenly jumps out of the cassette holder device as soon as the locking of the film cassette by the locking tool is released.

It is an object of the present invention to reduce differences in the loading operation force due to differences in the size of film cassettes to be loaded in a cassette holder device, and to prevent the film cassettes from suddenly popping out of the cassette holder device when removing the film cassette. Our goal is to provide technology that can prevent this.

[Means to solve the problem]

The above object is to provide a cassette holder device with a pair of holding frames, a pair of guide rails on the holding frame, a guide member in the center of the guide rail, and a cassette holder device that opens and closes symmetrically around the guide member. A pair of clamping frames connected by a sliding mechanism are provided, a sliding piece having a film cassette receiver and two pulleys is provided so as to be movable along the guide member, and a fixed pulley is mounted on the guide member. A drum rotatable in only one direction is provided on the holding frame, and a movable pulley is provided so that the holding frame can be moved in the longitudinal direction, and one end is fixed on the holding frame and the other end is movable. A pair of springs connected to pulleys are provided, and the bone is connected to one of the clamping frames by a wire through one pulley on the sliding piece.

Further, another wire that is hooked and turned around the other pulley on the sliding piece is further hooked and turned around the fixed pulley on the guide member, the drum, and the movable pulley to fix the end to the holding frame. Ru.

[Effect]

Before loading the film cassettes (hereinafter referred to as F and C), the sliding piece is at the limit of movement position on the guide member due to the tension of the spring. F, C. When loading, when the clamping frame is expanded by hand in the opening direction, the receiver connected to the clamping frame by the wire moves to the movement limit position on the guide member.

When the tips of F and C are pressed against the receiver and pushed into the cassette holder device, the receiver is moved by the force, the wire is pulled, and the pair of clamping frames are simultaneously closed by a mechanism that moves symmetrically. It is pulled in the direction F, C, and comes into contact with the sides and stops. When F and C are pressed further, the sliding piece moves and the wire is pulled, and the fixed pulley and drum rotate.
The spring is stretched via a movable pulley. The amount of extension of the spring at this time is 1/4 of the amount of movement of the receiver if there is only one movable pulley connected to one spring; In the case of 2 pieces, the amount of movement of the receiver is 1/8.

As mentioned above, the sizes of F and C vary, and the amount of movement of the receiver differs depending on the size of F and C to be loaded. By reducing the spring constant of the spring as much as possible, it is possible to reduce the difference in operating force during loading of F, C, due to the difference in the amount of spring extension, but there is a limit to the operable spring constant.

Therefore, in the present invention, by connecting a movable pulley to the spring, the amount of spring extension relative to the amount of movement of the receiver is reduced, and the difference in loading operation force caused by the size of F, C, and size to be loaded is reduced. I'm keeping it small.

When F, C, are completely loaded into the clamping frame, the locking tool is attached to F,
F, C, is held firmly in the cassette holder to lock the rear end of C and prevent F, C, from trying to fly out due to spring tension.

When F and C are unlatched by the locking tool when F and C are removed, the spring tension causes the receiver to move in a direction that pushes F and C out. At the same time, the spring tries to contract and pulls the wire through the movable pulley, but since the drum that is rotating the wire is set to be unable to rotate in this case, the force of friction between the wire and the drum causes the spring to contract. , a brake is applied to the contraction of the spring to prevent instantaneous contraction of the spring. As a result, the movement of the receiver to push F and C out is also slow, so when F and C are released from the locking device, F and C are suddenly moved out of the cassette holder device. This prevents the product from popping out.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the cassette holder device is provided with a pair of holding frames 1a and lb, and a pair of guide rails 2a and 2b are fixed to the holding frames 1a and lb. These holding frames la, lb and guide rail 2a
', 2b constitutes a frame structure that holds the entire cassette holder device, and this frame structure is transported from the scene preparation position to the photographing position by an appropriate transport mechanism (not shown).

A guide member 3 is fixed at the center of the guide rails 2a, 2b, and a sliding piece 5 with two pulleys 6a, 6b mounted thereon is movable along the guide member 3. A receiver 4 for F, C, and 25 is provided, and the receiver 4 is loaded with F, C, and F.

It has a U-shaped cross-section that receives the rear end of 25. Moreover, on the guide member 3, there are three fixed pulleys 14a,
14b and 14c are provided.

7a and 7b are a pair of clamping frames that hold loaded F, C, and 25, and in order to hold both sides of F, C,
As shown in Figure a and Figure 5, it has a U-shape.
Support members 8a, 8b, 8c.

It is movably attached to the guide rails 2a and 2b via 8d. A pair of racks 9a and 9b are fixed to the clamping frames 7a and 7b, and the distances from the pinion 10 to the clamping frames 7a and 7b are equal to the pinion 10 provided at the center of the guide member 3, respectively. engaged in the state. That is, this pair of racks 9a, 9b
The clamping frames 7a and 7b are held by a mechanism using a pinion 10 and
Since they are connected, symmetrical opening and closing movements centering on the guide member 3 can be performed.

Further, a bearing 22 is provided on the holding frame 7a.

A locking tool 11 is attached to this bearing 22 so as to be rotatable about the shaft 12. This locking tool 11 is for preventing the loaded F, C, 25 from falling off.
Normally, it is set at the position shown in FIG. 5a by the action of a torsion spring 23, one end of which is fixed to the shaft 12 and the bearing 22, respectively.

In addition, the holding frame 7a and the above-mentioned amount tool 1 are a fixed pulley 14c provided on the guide member 3 and a pulley 6 on the sliding piece 5.
connected by a wire 30a via b.

Further, the holding frames 1a and lb have slits 20a.

20b, and a roller 21 is movably attached to the slits 20a, 20b, as shown in FIG. One roller 21 is attached to each of the sliding fittings 18a and 18b.

A movable pulley 17a is attached to the slide fittings 18a and 18b.

17b is attached. Also, a sliding metal fitting 18a.

Spring 19a, 19b with a low spring constant, which has one end fixed to the holding frame 1a, lb, is connected to 18b, and the tension of the spring 19a, 19b causes the sliding fittings 18a, 1
．． 8b is drawn to the movement limit position above the slits 20a and 20b. Also.

The holding frames 1a, 1b are provided with drums A15a, 15b and drums B16a, L6b, and the rotational centers of these drums are equipped with parts for making them rotatable only in one arbitrary direction and not rotatable in the other direction, for example. It has something like a one-way clutch embedded in it.

The sliding piece 5 includes the springs 19a and 19b, the movable pulleys 17a and 17b, and the tram A15a.

15b, the drum B16a, 16b, the fixed pulleys 14a, 14b provided on the guide member 3, and the pulley 6a on the sliding piece 5, with one end fixed to each of the holding frames la, lb, and wire 30b. It is connected. This wire 30b is connected to drums A15a, 15b and drum B16a.

As shown in FIGS. 3 and 4, the hook is rotated between 16b like a sash hook. This is the wire 30b, the drums A15a, 15b, and the drum B16a.

This is to increase the frictional force with 16b. Further, drums Al 5 a, 15 b and drums B16a, 16b
rotates only when the wire 30b moves so as to extend the springs 19a, 19b, and cannot rotate in the opposite direction, that is, when the wire 30b moves so as to contract the springs 19a, 19b. It is set. That is, in FIG. 3, the drum A 15a is set so as not to rotate in the six directions of arrows (clockwise direction), and the drum B 16a cannot be rotated in the direction of arrow B (counterclockwise direction).

Further, the drum A15b and the old drum 6b on the holding frame 1b are arranged so that the drum A15b is in the counterclockwise direction and the drum B1 is in the counterclockwise direction.
6b is set so that it cannot rotate clockwise.

Next, in the cassette holder device of this embodiment, F, C
, the loading and unloading operations will be explained.

FIG. 1 shows the state of F, C, and 25 before loading. At this time, the sliding piece 5 is at the limit position of the movement of the guide member 3 in the left direction due to the tension of the springs 19a and 19b, and the receiver 4 can also be moved by the operator moving one of the clamping frames 7a and 7b in the opening direction. The guide member 3 reaches the leftward movement limit position.

In this state, when the rear ends of F, C, and 25 are pressed against the U-shaped part of the receiver 4, the operating force causes the receiver to 4.
moves to the right along the guide member 3, thereby pulling the wire 30a and drawing the clamping frame 7a, and at the same time pulling the clamping frame 7b together via the racks 9a, 9b and pinion 1o. At this time, the locking tool 11 comes into contact with F, C, 25 as shown in FIG. , 25 in the direction of arrow F in the figure, and when the holding frames 7a and 7b come into contact with both side surfaces of F, C, and 25, the state shown in FIG. S is reached. However, at this point, F, C, and 25 are not completely loaded, and when F, C, and 25 are pushed further, the sliding piece 5 moves and the wire 30b is pulled, causing the fixed pulleys 14a, 14b and the drum A.
15a, 15b, drum B16a, 16b, and movable pulley 17a.

17b rotates, slide fittings 18a and 18b move, and springs 19a and 19b are expanded.

The amount of movement of the receiver 4 varies depending on the size of the loaded F, C, but the receiver 4 and the sliding piece 5 are connected by a wire 30a via a pulley 6b, and the sliding piece 5 and the spring 19a and Since the spring 19b is connected by the wire 30b via the movable pulleys 17a and 17b, the spring 19
The amount of extension of a and 19b is 1/4 of the amount of movement of the receiver 4. This is to minimize the difference in operating force during loading, which is caused by the size of the F and C to be loaded.

FIG. 2 shows the state in which F and C have been completely loaded.

At this time, the locking tool 11 returns to its original state, that is, the state shown in FIG. 5a, by the force of the torsion spring 23, and the
and to prevent F, C, and 25 from jumping out due to the tension of 19b.

F, C, and 25 are firmly held between the clamping frames 7a and 7b.

After the X-ray photography is completed, the locking tool 11 is moved along the arrow C shown in FIG. 5a.
When pushed in the direction, the locking tool 11 becomes the state shown in FIG.
Due to the tension of 9a and 19b, F, C, and 25 try to move in the direction of pushing them out.

However, drums 15a, 15b and tram 16a.

16b is set so that it cannot rotate when the wire 30b moves to contract the springs 19a and 19b, so the wire 30b and the drum A 15 a.

Due to the frictional force between the springs 15b and the drums B16a and 16b, the contraction movement of the springs 19a and 19b is braked and slow, so that the loaded F,
C, 25 is gently pushed out by the receiver 4.

The present invention has been described above based on the embodiments, but for example, two or more movable pulleys 17a and 17b may be attached to one spring, and the springs 19a and 19b may correspond to the amount of movement of the receiver 4. The amount of elongation may be further reduced.

Further, in order to further slow down the contraction movement of the springs 19a, 19b when removing F, C, the movable pulleys 17a, 17b
The fixed pulleys 14a and 14b may also be made unrotatable in appropriate directions, and the number of turns of the wire 30b between the drums A 15a and 15b and the drums B 16a and 16b may be further increased.

〔Effect of the invention〕

According to the present invention, F, C, at the time of loading.

It is possible to reduce the difference in loading operation force caused by the size, and when removing F, C, it can be sent out gently, so it is easier to load and remove F, C, during X-ray photography. This has the effect of improving work efficiency and operability.

[Brief explanation of the drawing]

1 and 2 are plan views showing the structure of a cassette holder device according to an embodiment of the present invention. FIG. 4 is a sectional view of the main part taken along the line D-D in FIG.
FIG. 3 is a plan view of FIG. 4. FIG. 5 is a view taken in the direction E of FIG. 1, and is a diagram for explaining the operation of the cassette holder device. la, lb... Holding frame, 2a, 2b... Guide rail, 3... Guide member, 4... Receiver, 5... Sliding piece, 6a. 6b-=pulley, 7a, 7b-clamping frame, 8a, 8b. 8c, 8d...support member, 9a, 9b...rack,
DESCRIPTION OF SYMBOLS 10... Pinion, 11... Locking tool, 12... Shaft, 14a. 14b, 14cm fixed pulley, 15a, 15b-drum A,
16a, 16b - drum B, 17a, 17b... moving pulley, 18a, 18b - sliding metal fitting, 19a. 19 b-・Spring, 20a, 20b-Slit, 21・
・Roller, 22... Bearing, 23... Torsion spring, 2
5-”: F) Ii Mucassette (F, C,), 30
a, 30 b...wire. Cow ■ Mouth second error S mouth d Yu S ■ b

Claims (1)

[Claims] 1. In a cassette holder device that loads and holds a film cassette and transports it to an X-ray imaging position to perform X-ray imaging, the holding frame is provided with at least one pair of guide rails, and the holding frame is provided with at least one pair of guide rails, and the film cassette is held at approximately the center of the rail. A guide member is provided in the section, a receiver and a sliding piece are provided on the guide member so as to be movable along the guide member, and a pair of clamps are connected by a mechanism that can open and close symmetrically about the guide member. A frame is provided, a locking device is provided to prevent the film cassette from falling off when it is loaded, a drum rotatable in only one direction and at least one pair of springs are provided on the holding frame, and one end of the spring is connected to at least one movable pulley. and the movable pulley is connected to the sliding piece via the drum by a wire, and the receiver and one of the clamping frames are connected by a wire via the sliding piece. Cassette holder device.