JPS642193Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a totalizer that measures and displays, for example, the distance traveled by a vehicle by rotating a plurality of character wheels sequentially from lower digits to higher digits.

In general, this type of totalizer has a pinion gear meshed between a plurality of character wheels 2 inserted through a shaft 1, as shown in FIG. The rotation is transmitted to the character wheel 2 of the lower digit, and for each rotation of the character wheel 2, the character wheel 2 of the upper digit adjacent to the character wheel 2 is rotated in conjunction with the operation of the pinion gear 3. It is configured to carry over from the lower digits to the higher digits.

Here, each of the above character wheels 2 is connected to the pinion gear 3.
In order to rotate smoothly through the shaft, a locking member 5 is fitted to the shaft 1 to form a certain clearance between the character wheel 2 and the shaft 1 in the axial direction.
This locking member 5 is brought into contact with each outer surface of the lowest digit and the highest digit of the character wheel 2 to restrict free movement of the character wheel 2 in the shaft 1 direction. However, when assembling the character wheel 2, one of the locking members 5 is first fixed to one end of the shaft 1 by press-fitting or the like, or an annular groove is formed at a predetermined location on the shaft 1 (not shown) and a snap washer is installed. are engaged with the grooves, then each character wheel 2 is sequentially inserted into the shaft 1, and finally the other locking member 5 is set so that a certain clearance is provided so that each character wheel 2 can rotate smoothly. This requires the same installation procedure as that for the other locking member 5, which is troublesome to assemble.

As a measure against this, it is conceivable to form at least one of the locking members 5 integrally with the shaft 1 side to improve the efficiency of the assembly work. In this case, as shown in FIG. 2, if the shaft 1 side and one of the locking members 5 are directly made of synthetic resin, the shaft 1 will be deformed due to heat, and if the diameter of the shaft 1 is small, the strength will be weakened. The shaft 1 can be constructed by inserting a metallic core material 1A in the center of the shaft 1 to reinforce the shaft 1, or the shaft 1 can be constructed by cutting a wire made of a metallic material into a predetermined length as shown in FIG. However, it is conceivable to form the locking member 5 integrally with the shaft 1 by bulging it by forging, forging, or the like.

However, when the shaft 1 and one of the locking members 5 are integrally formed as shown in FIGS. 2 and 3, the six corner portions connecting the shaft 1 side and the locking member 5 are A molding die (not shown) becomes rounded due to wear over time, and the assembly position of the character wheel 2 is displaced. That is, the base 6
Since the corner portions of the points are rounded and raised, the outer surface portion of the character wheel 2 is not restricted to come into direct contact with the side surface of the locking member 5, but the raised portion of the base 6 and the side surface portion of the character wheel 2 come into contact with each other. The side surface of the locking member 5 and the letter wheel 2
A clearance L is created between the character wheels 2 and the side surfaces, and as a result, the clearance between each character wheel 2 is narrowed by this clearance L, which causes a load to be applied during carry drive and impede the rotation of the character wheels 2. In some cases, the character wheel 2 may become locked and become unable to rotate.

This invention solves the above problem by forming a pinion gear in mesh with each other between a plurality of character wheels inserted through the shaft, and abutting against the outer surfaces of the lowest and highest digits of the character wheels. A locking member is provided on the shaft to restrict the free movement of the character wheel in the shaft direction, and for each rotation of the lowest digit character wheel, the character wheel of the next digit is rotated via the pinion gear, and In a totalizer that carries up from the digit side to the upper digit side, one side of the locking member that comes into contact with the outer surface of the lowest digit and the highest digit of the character wheel is integrated with the shaft. At the same time, a concave portion is formed at the base of the locking member and the shaft toward the locking member, and the side surface of the character wheel and the side surface of the locking member are brought into contact with each other.
The purpose of this system is to maintain a constant clearance between each letter wheel assembled on the shaft, smooth the rotation carry drive of each letter wheel, and further simplify the assembly work to reduce costs. be.

This invention will be explained below based on embodiments shown in the drawings. In FIG. 4, 10 is a frame formed in a U-shape, and a metal shaft 11 is installed on this frame 10, and a plurality of character wheels 12 are rotatably inserted into this shaft 11. has been done.

Further, a pinion gear 13 is interposed between the character wheels 12, and rotationally transmits the rotational drive from the wheels to the character wheel 12 of the lowest digit through the character gear 14, and every rotation of the character wheel 12. The pinion gear 13 is engaged and rotated one pitch at a time, and as the pinion gear 13 operates, the character wheel 12 of the next digit adjacent to the character wheel 12 is rotated, and the digits of the character wheel 12 are sequentially moved from the lower digit to the upper digit. It is configured to operate upward.

Therefore, the shaft 11 is provided with a locking member 15 that restricts contact with the outer surface side of the highest digit of the character wheel 12.
It is integrally bulged and molded by heading, forging, etc.

Further, after each character wheel 12 and pinion gear 13 are assembled to the shaft 11, each character wheel 12 is assembled to the shaft 11.
A locking member 15A that comes into contact with the outer surface of the lowest digit character wheel 12 is attached by means of press-fitting, engagement, etc. with a certain clearance provided so that it can rotate smoothly.

In addition, as clearly shown in FIG. 5, the shaft 11
A recess 17 is formed at 16 bases of the locking member 15 and facing the locking member 15.

In the above configuration, by integrally molding the locking member 15 on one side of the metal shaft 11 by forging or forging, the troublesome assembly work is eliminated, the manufacturing process is reduced, and the product cost is reduced. can be reduced. In this case, similar effects can be obtained even if the shaft and the locking member are made of synthetic resin material.

Further, on the side of the locking member 15 that is integrally formed with the shaft 11, the locking member 15 and the shaft 11 are connected to each other.
By forming the concave portions 17 toward the locking member 15 at 16 locations at the base of the locking member 15, there is no raised portion on the side surface of the locking member 15, and as a result, there is a gap between the side surface of the locking member 15 and the side surface of the character wheel 12. Contact can be maintained without creating a gap, and by mounting the other locking member 15A at a specified press-fit engagement position, the clearance between each character wheel 12 assembled on the shaft 11 can be kept constant. The rotation carry drive of each character wheel 12 can be carried out smoothly. In this case, although not shown, by creating a mold along the recess 17, even if the mold wears out to some extent, the recess in the recess 17 on the shaft 11 side will become somewhat shallower. , the side surface of the character wheel 12 and the side surface of the locking member 15 can be kept in contact with each other at all times, and thereby the clearance between the character wheels 12 can be maintained in a defined state.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing a totalizer of a conventional device, Fig. 2 is a sectional view of a main part of another conventional device, and Fig. 3 is a main part of another conventional device. 4 is a front sectional view showing the totalizer of this invention, and FIG. 5 is an enlarged sectional view showing the main part of FIG. 4. Frame...10, Shaft...11, Letter wheel...12, Pinion gear...13, Letter gear...
14, Locking member...15, 15A, Base...1
6. Concave portion...17.

Claims (1)

[Scope of utility model registration request] A pinion gear is meshed between multiple character wheels inserted into the shaft, and abuts against the outer surfaces of the lowest and highest digits of the character wheel to restrict free movement of the character wheel in the shaft direction. A locking member is provided on the shaft, and each rotation of the lowest digit character wheel rotates the next digit character wheel via the pinion gear, and the character wheel is sequentially carried from the lower digit side to the higher digit side. In the totalizer, one side of the locking member that abuts the outer surfaces of the lowest digit and the highest digit of the character wheel is integrally formed with the shaft, and the locking member and the above-mentioned locking member are integrally formed on the shaft. A totalizer characterized in that a recessed portion facing the locking member is formed at the base of the shaft, so that the side surface of the character wheel and the side surface of the locking member are in contact with each other.