JPS5816029Y2 - Preset counter - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in preset counters.

A preset counter sends out an output signal when counting up to a preset value, and is attached to office equipment, industrial equipment, etc., and is commonly used as a numerical control device.

In this type of preset counter, the set numerical value may be changed during use, but if an input is made during this changing operation, it will be counted, making it impossible to perform accurate numerical control.

Therefore, the present invention provides a preset counter that prevents the counter from counting even if an input is made during a numerical value setting operation, thereby enabling more accurate numerical control.

In the preset counter according to the present invention that has achieved this objective, when the setting wheel is operated to set a numerical value, the pinion alignment member is rotated by the numerical value setting mechanism and engages with the pinion that is in mesh with the counting wheel. This is configured so that the counter wheel is locked by the hand, thereby rendering the counting wheel in a non-counting state.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

FIG. 1 is a front view of the preset counter according to the embodiment, with the front panel omitted, and FIG. 2 is a longitudinal cross-sectional view of the main parts thereof.

The preset counter of this embodiment has a casing composed of a frame 1 having an upwardly U-shaped cross section, and a front panel 2 assembled to the front part of the frame 1.

A counting wheel axle 3 and a setting wheel axle 4 which are vertically spaced apart and parallel to each other are supported in front of the frame 1, and a plurality of counting wheels 5 and a driving gear 6- are rotatably mounted on the counting wheel axle 3. The setting wheels 7, the same number as the counting wheels, are rotatably mounted on the setting wheel axle 4.

Each counting wheel 5 has a heart cam and a gear integrally formed on its negative side, and a shift pin is formed on a part of the other side edge.

The drive gear 6 includes a gear having the same diameter as the gear of the counting wheel 5 and a star gear integrally formed on one side of the gear.

Further, the setting wheel 7 consists of a main body with numbers written on its circumferential surface, a finger grip portion of a slightly large diameter, and a gear.

The front panel 2 has a window 8 for reading the numerical value of the counting wheel 5.
A lid body 9 that can be opened and closed in correspondence with the setting wheel 7 is provided.
is provided.

An electromagnetic coil 10 is attached to the frame 1 behind the counting wheel 5, and an armature 1 is mounted opposite the core 11 of this coil.
2 is swingably supported by the yoke 13 of the electromagnetic coil 10.

A pawl 14 is engaged with the free end of the armature 12, and this pawl 14 swings about a support shaft 15 supported on the frame 1 as a fulcrum by the rocking motion of the armature.

The pawl 14 is biased clockwise in FIG. 2 by a pawl spring 16, so that one 17 of a pair of feed pawls 17 and 18 formed at its tip meshes with the star gear of the drive gear 6.

A pinion 19 is interposed between each counting wheel 5.

The pinion 19 acts to transfer the rotation of the lower digit counting wheel to the upper digit counting wheel.

Note that the pinion interposed between the least significant digit counting wheel and the drive gear 6 merely transmits rotation.

These pinions 19 are rotatably mounted on a support shaft 20 supported between both arms of a pinion bracket 21 formed in an upward U-shape.

The bracket 21 is swingably supported on a shaft 22 supported on the frame 1.

Further, this bracket 21 is swung by the operation of the reset push button member 23, although the details thereof will be omitted.

The reset push button member 23 has an operation section located on the front panel 2.
It is more protrudingly exposed and is slidably supported by the frame 1.

Also associated with reset pushbutton member 23 is a reset member 24 .

The reset member 24 is swingably supported by a support shaft 25 supported on the frame 1, and has a plurality of pressing pieces corresponding to the heart cams of each digit counting wheel.

Further, this reset member 24 is given a rotational habit in the counterclockwise direction in FIG. It also acts to urge the bracket 21 counterclockwise via this push button member.

Note that the detailed structure of the relationship between the bracket 21, the reset pushbutton 23, and the reset member 24 is not a direct gist of the present invention, so a description thereof will be omitted.

A pinion alignment member 27 is swingably mounted on the support shaft 22 of the bracket 21 .

The pinion alignment member 27, which is given a clockwise rotation behavior in FIG. 2 by a spring (not shown), has its free end extended close to the rear of the pinion 7, and has an arm 28 extended from its base. A pin 29 is also provided protruding from this arm.

A plurality of cam gears 30 are arranged between the counting wheel 5 and the setting wheel 7.

The cam gear 30 consists of a gear corresponding to the gear of the counting wheel 5, a gear corresponding to the gear of the setting wheel, and a main body having a cam groove recessed in a part of the circumferential surface.

A support shaft 31 on which the cam gear 30 is rotatably mounted is supported by a U-shaped cam gear bracket 32.

The bracket 32 is slidably supported by a support shaft 33 supported on the frame 1, and the cam gear support shaft 31 is supported at its free end.

A step is formed on the upper edge of the brass set 32, and the pin 29 of the pinion alignment member 27 engages with this step, thereby preventing clockwise rotation of the pinion alignment member plate 27. .

The end of the cam gear shaft 31 passing through the bracket 32 engages with a crank-shaped length (L34) provided on a setting wheel bracket 35 that is generally U-shaped.

The base of the bracket 35 is located below the group of setting wheels 7, and is swingably supported on the setting wheel axle 4.

This bracket 35 is given the ability to rotate counterclockwise in FIG. 2 by a spring 36, and a cam 37 having an arcuate cross section is protruded from its front end.

This cam 37 is engaged with the lower part of a cam 38 having an arcuate cross section and projecting from the inner surface of the lid body 9.

When the lid body 9 is closed by the engagement of these cams 37 and 38, the setting wheel bracket 35 is in a substantially vertical position, the cam gear bracket 32 is held in a horizontal position, and the cam gear shaft 31 is formed in a crank-shaped shaft hole. It is located in the horizontal part of 34.

In this state, the cam gear 30 meshes with the counting wheel 5 and disengages from the setting wheel 7.

A cam roller 39 is engaged with the main body of the cam gear 30, respectively.

The cam roller 39 is rotatably mounted on a support shaft 40 supported on a cam roller bracket 41, and the bracket 41 is swingably supported on a support shaft 42 supported on the frame 1, and is rotated clockwise by a spring (not shown). Rotation habits are attached.

Although the detailed structure will be omitted, a cam 43 is provided at the end of the cam roller shaft 40, and a switch actuation lever 45 with which a cam 44 is integrally formed is actuated by this cam.

The switch operating lever 45 is swingably supported by a support shaft 46 supported on the frame 1, and its lower end is configured as a switch operating section.

A microswitch 47 that is opened and closed by the switch operating lever 45 is fixed to the frame 1.

Regarding the embodiment preset counter configured as described above, the numerical value setting operation and pinion locking operation will be explained below.

The numerical value setting operation is performed by manually operating each digit setting wheel at a predetermined value while the lid 9 is opened and the setting wheel 7 is exposed.

When the lid 9 is opened in FIG. 2, the engagement between the cams 38 and 37 is released, and the setting wheel bracket 35 is rotated counterclockwise in the figure by the acting force of the spring 36.

Then, the cam gear shaft 31 engaged with the elongated hole 34 of this bracket 35 moves downward according to the shape of this hole, and the cam gear bracket 32 supporting this shaft 31 swings clockwise.

Thus, the cam gear 30 moves entirely downward, and the counting wheel 5 and the cam gear 30 are disengaged from each other, while the cam gear 30 meshes with the corresponding setting wheel 7.

On the other hand, as the bracket 32 rotates clockwise, the pinion alignment member 27, which was locked by the pin 29 engaging with the stepped portion thereof, rotates clockwise in FIG. 2 and comes into contact with the pinion 19. Touch it and lock it.

Therefore, when setting such a value, when an input pulse is sent to this preset counter, the electromagnetic coil 10 attracts the armature 12, the pole 14 swings, and the feed pawl 18 engages with the star gear to transmit the signal. Let us try to drive gear 6.

As described above, the transmission gear 6 is connected to the counting wheel 5 via the pinion 19, and since the pinion 19 is locked by the pinion alignment member 20, no counting operation is performed.

When the numerical value setting operation is completed, the lid body 9 is closed.

As a result, the cam 38 engages with the cam 37, and the setting wheel bracket 35 is rotated back clockwise against the acting force of the spring 36.

Then, the cam gear bracket 32 also swings counterclockwise, and the cam gear 30 is disengaged from the setting wheel 7, while
It re-engages with the counting wheel 5.

Note that, at this time, the cam groove of the cam gear 30 is set at a predetermined position with respect to the rotation direction in accordance with the set numerical value.

As the bracket 32 swings, the pinion alignment member 27 also returns counterclockwise, and the pin 29 engages with the stepped portion again, thereby releasing the locked state of the pinion 9.

Each time a human power pulse is sent, the counting wheel 5 sequentially rotates on the sidewalk.
At the same time, the cam gear 30 also rotates.

When the set value is reached, the cam roller 39 falls into the cam groove of the cam gear 30, and the cam roller racket 41
rotates clockwise.

Then, the engagement between the cams 43 and 44 is released, the switch operating lever 45 swings clockwise, and the microswitch 47 is opened.

In the above embodiment, the cam gear is configured to selectively mesh with the counting wheel and the setting wheel, and the swing bracket of the cam gear is used to drive the pinion alignment member. It will be obvious that in a preset counter configured such that the rotating member is always engaged, the pinion alignment member can be driven by the lid or the setting wheel support bracket.

As explained in detail above, according to the present invention, even if an input pulse is sent for some reason during a setting operation, the counting operation is not performed, so that accurate numerical settings can be made.

Further, although no special parts are required, the cost does not increase and the structure does not become complicated.

Furthermore, since the counting wheel is also locked via the pinion during the setting operation, the floating of the counting wheel that has been disengaged from the cam gear as in the embodiment is also prevented, ensuring accurate display and good re-engagement. It has various practical effects such as:

[Brief explanation of drawings]

FIG. 1 is a front view of the preset counter according to the embodiment with the front panel omitted, FIG. 2 is a vertical cross-sectional view of the same main part, and FIG. 3 is an explanatory view of the numerical value setting operation. 1...Frame, 5...Counting wheel, 7.
... Setting wheel, 9 ... Lid body, 10 ...
... Electromagnetic coil, 12 ... Armature, 14
...Pole, 19 ...Pinion, 23
...Reset push button member, 24...
Reset member, 27...Pinion alignment member, 2
9...Pin, 30...Cam gear, 32
...Cam gear bracket, 35...Setting wheel bracket, 39...Cam roller, 45.
...Switch operating lever, 47...Micro switch.

Claims (1)

[Scope of utility model registration request] a plurality of counting wheels, a pinion that transmits digit feed between these counting wheels, a reset mechanism that disengages the pinion and the counting wheels and resets the counting wheels to a predetermined display value;
A pinion alignment member that engages the disengaged pinion and aligns it to a constant posture, and a numerical value setting mechanism including a plurality of setting wheels, and when numerical values are set by operating the setting wheels. . A preset counter, wherein the pinion alignment member is rotated by a numerical value setting mechanism and is configured to engage and lock the pinion that is in mesh with a counting wheel.