JPH0517726Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a return-to-zero counter, and more particularly to a return-to-zero counter that prevents slight movement of the number wheel when the number wheel and pinion are engaged after returning to zero, and allows characters to be aligned without misalignment.

[Conventional technology]

A conventional return-to-zero counter has a configuration as shown in FIG. That is, on both sides of the rectangular frame 1, there are through holes 2A,
2B is provided. A return lever 4 is rotatably supported in the through holes 2A, 2B via a shaft 3. This return lever 4 has a plurality of return claws 5 formed with a certain slope at the tip, and arms 6A, 6B are arranged at right angles to the return claws 5 on both sides of the return claws 5. It is provided. The arms 6A, 6B are provided with holes 7A, 7B, respectively, and a shaft 8 is fitted into the holes 7A, 7B. A plurality of integrating pinions 9 are fitted onto the shaft 8, and the integrating pinions 9 are rotatably supported by the shaft 8. This integrating pinion 9 is provided with square pillar portions 9A, 9B, and 9C in the axial direction, respectively. Both ends of this shaft 8 are fitted into rectangular windows 11A and 11B provided approximately at the center of both side surfaces of the frame 1, allowing the return lever 4 to rotate freely about the shaft 3. In addition, through holes 12 are provided on both sides of the frame 1.
A, 12B are provided, and this through hole 12
A shaft 13 is fitted into A and 12B. A plurality of numerical wheel gears 14 are rotatably fitted on this shaft 13. Each of the numerical wheel gears 14 is provided with a heart cam 15. When the return lever 4 is rotated, it comes into contact with this heart cam 15, and the number wheel gear 14 is returned to zero. Furthermore, through holes 16 are provided on both sides of the frame 1.
A, 16B are provided, and this through hole 16
A shaft 17 is fitted into A and 16B. Further, a pinion alignment spring 18 is fixed to the lower surface of the return lever 4, and is formed in an L shape and has a comb-like spring portion.
is configured to engage. That is, when the return lever 4 is in the normal position, the spring portion of the pion alignment spring 18 is in contact with the shaft 17 when the integrating pinion 9 is screwed with the number wheel gear 14, and the return lever is in the normal position. 4, the pinion alignment spring 18
The spring part of and the square column part 9 of the integrating pinion 9
A, 9B, and 9C are configured to engage with each other, and the shaft 17 serves as a stopper to prevent the pinion alignment spring 18 from coming into contact with the integrating pinion 9 when the return lever 4 is in the normal position. doing. Since it is constructed in this way, first, by rotating the return lever 4 in the direction shown by the arrow A in FIG.
and the plurality of integrating pinions attached to the return lever 4 are released. Thereafter, the plurality of return pawls 5 integrally formed on the return lever 4 push the corresponding heart cams 15 of the plurality of numerical wheel gears 14 as shown in FIG. 7, thereby bringing all the numerical wheel gears 14 to the zero position simultaneously. At this time, the spring portion of the pinion alignment spring 18 having a plurality of spring portions engages with the square pillar portions 9A, 9B, and 9C of the integrating pinion 9, and the position of the integrating pinion 9 in the rotation direction is adjusted. stipulate. Thereafter, when the return lever 4 is rotated to return to its original position, the integration pinion rotates together with the return lever 4 and returns, and before the number wheel gear 14 and integration pinion 9 engage, the pinion is The alignment spring is released from pressure contact with the integrating pinion 9.

[Problem that the invention attempts to solve]

However, in such a conventional zero-return type counter, as shown in FIG. After regulating the position by the pinion alignment spring 18, arrow B
When the return lever 4 is rotated as shown in FIG. 8 to engage the totalizing pinion 9 with the number wheel gear 14, the totalizing pinion 9 draws an arc around the shaft 3 as shown in FIG. In order to mesh with 14,
As shown in FIG. 9, the teeth of the number wheel gear 14 and the teeth of the integrating pinion collide with each other, causing slight movement after returning to zero, resulting in a problem in that it is impossible to align them neatly.

[Means to solve the problem]

This invention prevents slight movement of the number wheel when the number wheel and pinion engage after returning to zero, and can align the character strings without shifting. A return lever having a pawl and an arm, a plurality of integrating pinions each having a square column part supported by the arm of the return lever, and the integrating pinion supported by the frame are always in mesh with each other. A pinion alignment spring includes a plurality of numerical wheel gears each having a cam, and a pinion alignment spring that is fixed to the return lever and includes a spring portion that engages with a pillar portion of the integrating pinion, and rotates the return lever. In a zero-returning counter that engages the return pawl with the cam and returns to zero by regulating the rotational position of the totalizing pinion using a pinion alignment spring, the frame is provided with a radial direction from the central axis of the number ring gear. In addition to providing elongated holes in the same direction, the tip of the arm of the return lever is formed into a Y-shape, and the elongated hole and the Y-shape support a shaft that supports the integration pinion. The pinion is inserted and removed by facing in the radial direction of the number wheel gear.

[Effect]

Rotate the return lever around the shaft, move the integrating pinion along the elongated hole, and release the mesh with the number wheel gear. Further, the return lever is rotated to engage the return pawl provided on the return lever with the heart cam provided on the number wheel gear, thereby returning the number wheel gear to zero. Further, after the integrating pinion is separated from the number wheel gear, the rotational position of the integrating pinion is regulated by a pinion alignment spring, and the teeth of the integrating pinion are aligned. Then, when the return lever is returned to its original position, the totalizing pinion moves toward the center of the number wheel gear, so the aligned teeth of the totalizing pinion mesh with the teeth of the number wheel gear without colliding with each other. do.

【Example】

Examples of the present invention will be described below. FIG. 1 shows an embodiment of the present invention. In the figure, the differences from the conventional example shown in Figure 5 are as follows:
Instead of rectangular windows 11A and 11B provided on both sides of the frame 1 at approximately the center of both sides of the frame 1, the integration pinion 9 is supported when the integration pinion 9 is released from the number wheel gear 14. A long hole 100 is provided to guide the shaft 8 to move horizontally with respect to the center axis of the number wheel gear 14, and a return lever supports the shaft to which the integration pinion 9 is fitted. 4 arms 6A, 6B, Y
The pinion alignment spring 18 is formed in a letter-shaped shape so that the shaft 8 can slide in the longitudinal direction of the arms 6A and 6B, and the bottom of the pinion alignment spring 18 is fixed to the frame 1. In this way, the numerical ring gear 14 rotatably fitted onto the shaft 13 is fixed to the frame 1. Further, the return lever 4 includes a return pawl 5, and the shaft 3
It is rotatably supported around the center. In this return lever, a plurality of integrating pinions 9 are semi-fixed to a pinion shaft 8, and the pinion shaft 8 is connected to an elongated hole 10 of the frame 1 that guides the integrating pinions 9.
0, it is guided to move linearly in the horizontal direction from the axis of the numerical wheel gear 14. Also, when the pinion alignment spring 18 regulates and aligns the rotational position of the integration pinion 9 and the integration pinion 9 meshes with the numerical wheel gear 14, the pinion alignment spring 1
8 is disengaged by an integration pinion 9. Arm 6 of return lever 4 supporting this shaft 8
At the tips of A and 6B, there is a bearing part 6 formed in a Y-shape.
0A and 60B are provided. Further, as shown in FIG. 2, the pinion alignment spring 18 is constructed separately from the return lever 4, and its bottom part is fixed to the frame 1. They are provided so as to be perpendicular to the longitudinal direction of the elongated hole 100 when in contact with each other. Since it is configured like this, now,
As shown in FIG. 2, the return lever 4 is rotated from the position shown by the two-dot chain line to the position shown by the solid line, and the number wheel gear 14 is returned to zero by the heart cam 15.
At the same time, the rotational position of the integrating pinion 9 is regulated by the square column parts 9A, 9B, and 9C by the spring part 18A of the pinion alignment spring 18.
Now, when the return lever 4 is returned from the position shown by the solid line in FIG. Perform horizontal linear movement towards the axis. On the other hand, the rotational position of the integrating pinion 9 is regulated by the pressure of the spring portion 18A of the pinion alignment spring 18, and when the return lever 4 is rotated and returned to the original position, the integrating pinion 9 is As the return lever 4 rotates, the angle of the pinion alignment spring 18 with respect to the bottom of the spring portion 18A changes, so that the pinion alignment spring 18 gradually rotates. When the spring portion 18A of the pinion alignment spring 18 comes into contact with the shaft 17, one of the teeth of each integrating pinion 9 is regulated to a position facing the center of the number wheel gear 14. After that, even if the return lever 4 is rotated to the position shown by the two-dot chain line in FIG. . Therefore, by arranging the teeth of the integrating pinion 9 and the square prism part 9A so that the teeth facing perpendicularly to each surface of the square prism part are aligned, the position shown in FIG. As such, it does not enter the center of the number wheel gear 14 and come into contact with the mating gear. FIG. 4 shows another embodiment of the invention. In the figure, the difference between this embodiment and the embodiment shown in FIG. 1 is that the elongated hole in the embodiment shown in FIG. Therefore, in this embodiment, the elongated hole 200 is formed so that the direction of the hole is directed toward the center axis of the number wheel gear 14, that is, the hole direction is set in the same direction as the radial direction from the center axis of the number wheel gear 14. This is the point I made. With this configuration, the integrating pinion 9 enters perpendicularly to the tangential direction of the numerical wheel gear 14 and toward the center axis of the numerical wheel gear 14, so that the teeth of the integrating pinion 9 are aligned with the numerical wheel gear 14. No collision with teeth. In the case of this embodiment, when the spring portion 18A of the pinion alignment spring 18 comes into contact with the shaft 17, the totalizing pinion 9 has one tooth.
The positional relationship between the teeth of the integrating pinion 9 and the square pillars 9A, 9B, and 9C must be determined so that the teeth of the integrating pinion 9 are positioned toward the center of the square pillars 9A, 9B, and 9C. In addition, in the description of the embodiment of the present invention, the quadrangular prism portions 9A, 9B, and 9C provided in the axial direction of the integration pinion 9 are described as quadrangular prisms, but they do not necessarily have to be quadrilateral prisms. In order to return the number wheel gear to zero, the integrating pinion is disengaged from the number wheel gear and pressed against the spring portion 18A of the pinion alignment spring 18, and the spring portion 18 of the pinion alignment spring 18 that is pressed into contact with the pinion alignment spring 18 is pressed.
As long as the integrating pinions can be aligned according to A, it may be a triangular prism or a pentagonal prism. That is, the spring contact portions of the pinion alignment springs provided in the axial direction of the integrating pinions 9 are as follows:
It should be a square column.

[Effect of the idea]

As explained above, according to the present invention, the integrating pinion does not mesh with the number wheel gear while drawing a circular arc, but meshes toward the center axis of the number wheel gear, so that it collides with the gear to be meshed with. There is no slight movement when the integrating pinion meshes with the number wheel gear after returning to zero.

[Brief explanation of the drawing]

Fig. 1 is an overall assembly configuration diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the operation of the embodiment shown in Fig. 1, and Fig. 3 is a diagram showing the meshing state of the teeth of the embodiment shown in Fig. 1. FIG. 4 is a diagram showing another embodiment of the present invention, and FIG.
The figure is an overall assembly configuration diagram showing a conventional zero return type counter, Figures 6 and 7 are diagrams showing the zero return operation, Figure 8 is a diagram showing the return operation after zero return, and Figure 9 is a diagram of the conventional zero return type counter. FIG. 3 is a diagram showing the meshing state of teeth. 1... Frame, 3, 8, 13, 17... Axis,
4...Return lever, 5...Return claw, 6A, 6B
... Arm, 9 ... Integrating pinion, 9A, 9
B, 9C...Square prism part, 14...Number wheel gear, 1
5...Heart cam, 100,200...Long hole.

Claims (1)

[Scope of utility model registration request] a rectangular frame; a return lever that is pivotally supported by the frame and includes a return pawl and an arm; a plurality of integration pinions that are pivoted by the arms of the return lever and each has a prismatic portion; and the frame. a plurality of numerical shaft gears, each of which is rotatably supported by and in which the integration pinion is constantly engaged, and each of which is provided with a cam;
a pinion alignment spring fixed to the return lever and having a spring portion that engages with a pillar portion of the integration pinion; rotating the return lever causes the return pawl to engage the cam; In a return-to-zero counter that returns to zero by regulating the rotational position of the totalizing pinion using a pinion alignment spring, the frame is provided with an elongated hole in the same direction as the radial direction from the center axis of the number wheel gear, and the return lever is The tip of the arm is formed into a Y-shape, and the elongated hole and the Y-shape support a shaft that supports the integration pinion, and the integration pinion is inserted and removed while facing in the radial direction of the number wheel gear. A return-to-zero counter characterized by: