JPH0122672B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a set value residual type comprising a counting wheel and a setting wheel that send out an output signal when counting up to a preset value.

[Conventional technology]

This type of preset counter is attached to various types of equipment, such as machine tools and electrical equipment, and performs numerical control of operating time, etc., and various types of preset counters have been provided in the past. Among them, the set value residual type is configured so that the set value remains on the set wheel regardless of the counting operation by the counting wheel, even after counting has started. It is easy to check the set values, and even someone other than the person in charge can check this as necessary or change the set values during counting, which is excellent in terms of operability and practicality. .

[Problem to be solved by the invention]

By the way, the problem in forming the above-mentioned preset counter that retains the set value is that the counter body is composed of a display section, a setting mechanism section, a signal sending section, and a driving section, Since the components are integrated into the counter frame, which has an upward U-shape in a state where the components are associated with each other, the overall structure becomes complicated, and there is a risk that the workability and assemblage of each part may be reduced. This is true. Therefore, in the past, in this type of preset counter, it has been necessary to consider the arrangement position and interlocking state of each part, and reduce the number of component parts of each part as much as possible to create an efficient and simple structure as a whole. There are also demands for improvements in the workability and assemblability of each part, but all conventional methods have advantages and disadvantages, and no one has yet been proposed that can satisfy all of the above requirements. do not have.

For example, when a multi-digit setting wheel is mounted on a support shaft in a counter frame, its engager engages with a gear when a numerical value setting push button on the setting mechanism is pressed during initial setting or when changing a set value. Numerical values are set by matching them, but it is necessary to maintain this state at all times without any relation to other members. For this reason, this type of setting wheel has conventionally been provided with a locking means for maintaining its rotational position on the spindle, so that when the setting wheel is not operating the numerical value setting using the push button, the setting wheel can be locked on the spindle. For example, a device that was able to prevent the movement of
Various methods are known, including Japanese Patent No. 54-135153.

However, incorporating such a locking means into the counter frame, including the setting wheel, its support shaft, and the gear on the counting wheel, increases the number of component parts, complicates the structure, and reduces workability. There are also problems in terms of ease of assembly, and it is desired that some kind of countermeasure be taken.

In particular, for this type of preset counter, the structure is simplified and the number of component parts is significantly reduced, which simplifies workability and assembly, resulting in overall smaller size, lighter weight, and cost reduction. It is desired to achieve the above, and it is also required to be excellent in terms of operability, and there is a demand for a simple preset counter that takes these points into account.

[Means to solve the problem]

In order to meet such demands, the preset counter according to the present invention has a setting mechanism section including a push button for setting a numerical value for setting a numerical value of a setting wheel, which is configured as a unit with a setting box made of synthetic resin, and this is integrated into a counter. In addition to being able to be attached to the frame in a detachable manner, a part of this setting box is
An elastic locking piece is integrally formed to lock a gear part on the setting wheel side that is mounted on the counter frame side with which the engager of the numerical value setting push button engages, and to restrict its movement.

[Effect]

According to the present invention, by assembling a setting box made of synthetic resin in which a push button for setting the numerical value of the setting wheel is slidably assembled to a counter frame equipped with a counting wheel and a setting wheel, a preset counter can be set. By locking the elastic locking piece formed in a part of the setting box to the gear part on the setting wheel side, the setting wheel can be prevented from floating when the push button is not used to set the numerical value. This can be easily and reliably prevented.

〔Example〕

Figures 1 to 5 show an embodiment of a preset counter according to the present invention, and this embodiment shows a case where the preset counter is of a type that retains a set value and is equipped with a counting wheel and a setting wheel. It shows.

In these figures, the reference numeral 1 denotes a counter frame whose cross section is bent into a generally upward U-shape, with opposing side plates 2 at the front end thereof.
A pair of upper and lower support shafts 4 and 5 are supported parallel to each other between the support shafts 3 and 3. A five-digit counting wheel 6 having a gear 6a on one side and a driving gear 7 having large and small gear parts 7a and 7b on the lowest digit side are rotatably mounted on the lower support shaft 5. , and between the counting wheel 6 and the drive gear 7, there is interposed a pinion 9 which is mounted on a zero return bracket member 8 (see FIG. 4).

Reference numeral 10 denotes a counting electromagnetic device disposed on the right side of the rear end of the frame 1. As shown in FIG. The pawl portion 12a of the operating pawl 12 sequentially meshes with the small gear portion 7b of the drive gear 7, thereby driving the drive gear 7 to rotate. Therefore, each digit counting wheel 6 is sequentially rotated through the pinion 9 by the rotation of the drive gear 7, and the counted value corresponding to the counting pulse is transmitted to each digit counting wheel 6.
will be added to and displayed. Further, reference numeral 6b denotes a heart cam provided on the other side of each counting wheel 6, and when the pusher 8a of the zero return bracket member 8 engages with the heart cam 6b, each counting wheel 6 is returned to zero all at once. Further, 13 is a zero return slide plate interposed between the frame bottom plate 1a and a support bracket member 14 having an elastic piece 14a for pinion alignment.
The slide plate 13 slides by pressing a zero return push button 16 provided on the lower front side of a cover 15 which is placed over the front end of the frame 1, thereby rotating the zero return bracket member 8. On the other hand, frame 1
The electromagnet device 17 disposed on the left side of the rear end is also
By swinging the armature 18 provided opposite to this, the zero return bracket member 8 is rotated via the return lever 19, which serves to return each counting wheel 6 to zero. That is, the counting wheel 6 is returned to zero manually or automatically by a control signal from a remote location. Further, among the upper and lower pair of display windows 15a and 15b provided on the front surface of the cover 15, the lower display window 15b is for displaying the counted value by the counting wheel 6.

On the other hand, five-digit setting wheels 20 are rotatably mounted on the upper support shaft 4, and a boss portion 20a protruding from one side of each of these setting wheels 20 is provided with gears of each counting wheel 6. A setting cam gear 21 that meshes with 6a is rotatably and slidably mounted in the axial direction.
As is clear from FIGS. 6 and 7, the opposing surfaces of each setting wheel 20 and setting cam gear 21 are provided with cam grooves 22 and cam protrusions 23, respectively, which engage at predetermined positions in the circumferential direction. It is provided. Therefore, when the cam protrusion 23 of the setting cam gear 21 faces the cam groove 22 of the setting wheel 20, that is, when the set value of the setting wheel 20 and the value of the counting wheel 6 match, the setting cam gear 21 moves to the setting wheel. It moves to the 20 side and is engaged. The upper display window 15a on the front surface of the cover 15 is for displaying numerical values set by the setting wheel 20.

Further, on the support shaft 24 supported parallel to the rear of the upper support shaft 4 between the frame side plates 2 and 3, there is a signal control bracket having a pressing piece 25a for pressing the setting cam gear 21 toward the setting wheel 20 side. A member 25 is supported slidably in the axial direction. The signal control bracket member 25 is configured to control when the cam protrusion 23 of each setting cam gear 21 can engage with the cam groove 22 of the corresponding setting wheel 20, that is, when the counting wheel reaches the set value of the setting wheel 20. When all the numbers 6 match, it is configured to move to the left as shown by arrow a in FIG.

Now, according to the present invention, as shown in FIGS. 1 and 8, there is a setting mechanism section that sets a numerical value of the setting wheel 20, and a signal that sends out an output signal when the counting wheel 6 matches the set value. A setting box 30 incorporating a sending section is configured to be used as a unit separately from the frame 1. and,
As is clear from FIGS. 2, 4 and 5, the setting box 30 is assembled and integrated from above the frame 1.

To explain this in detail, this setting box 30 is
The entire structure is made of a synthetic resin material, with a front end 30a facing above the setting wheel 20 and having a thin thickness in the height direction, and a rear end 30b facing above the electromagnet devices 10 and 17 and having a thick thickness in the height direction. It is formed. On both the left and right sides of this setting box 30,
A pair of positioning guide protrusions 31a, 31b; 32a, 32b in the front and rear directions, and locking protrusions 33a, 33b; 34a, 3 for frame attachment.
4b is integrally provided. Correspondingly, on the upper side of both side plates 2 and 3 of the frame 1, a pair of guide grooves 2a and 2b;
and locking holes 2c, 2d; 3c, 3d are formed. Therefore, by fitting the setting box 30 between the side plates 2 and 3 of the frame 1 from above, the setting box 30 is easily and reliably assembled and integrated in a correctly positioned state. Of course, locking hole 2
c, 2d; Locking protrusions 33a, 33 from 3c, 3d
b; By removing 34a and 34b, this setting box 30 can be easily removed from the frame 1.

In this case, as shown in FIGS. 4 and 5, in this setting box 30, the inner edges of the pair of guide protrusions 31a, 31b; 3b
It is positioned with respect to the frame 1 by being locked to the inner edge of the frame 1, and the positional relationship between the built-in parts and the components on the frame 1 side is set accordingly.

Further, in the front end portion 30a of the setting box, there are five storage grooves 36 upwardly arranged to slidably hold numerical value setting push buttons 35 (see FIG. 9) that constitute a setting mechanism section for setting numerical values of the setting wheel 20. and is formed with an opening at the front. For each of these storage grooves 36, five numerical value setting push buttons 35 are provided for each setting wheel 20.
These push buttons 35 are removably assembled in correspondence with the base 35a of the push buttons 35 within the storage groove 36.
A spring 37 interposed between the groove 36 and the rear end of the groove 36 constantly applies a forward biasing force, and is configured to slide in the front-rear direction when pressed.

Note that 36a is a locking projection protruding from the upper edge of the groove 36 so as to lock the upper part of the base 35a of the push button 35; 36b is a recess for holding the spring 37;
36c is a cutout groove for an engager of the push button 35, which will be described later, and the spring 37 is held in a guide hole 35b formed in the push button base 35a. moreover,
The tips of these push buttons 35 are configured to protrude forward of the frame 1, and protrude from the front surface of the cover 15 through holes 38 protruding from the upper end of the front surface of the cover 15, so that they can be pressed from the outside.
In this case, the hood 39 protruding from the upper end of the front surface of the cover 15 is provided to prevent the numerical value setting push button 35 from being erroneously operated.

Further, each push button 35 has an engaging element 40 that projects from the lower center toward the rear end and serves as a feed pawl, and when the push button 35 is pressed, the engaging element 40 is activated as shown in FIGS. and a gear portion 2 formed on one side of the setting wheel 20, as shown in FIG.
By engaging with 0b, the setting wheel 20 is sequentially rotated to set a numerical value. On the other hand, on the lower side of the front end portion 30a of the setting box 30, as is clear from FIGS. 1 and 10, there is an elastic locking piece 41 that engages with the gear portion 20b of the setting wheel 20 to restrict its movement. It is integrally protruded.

According to such a configuration, frame 1
The elastic locking piece 41 formed integrally with the setting box 30 made of synthetic resin, which is integrally assembled above, engages with the gear portion 20b, thereby locking the setting wheel 20.
As is clear from FIG. 10, the floating state is always regulated. Therefore, it is no longer necessary to incorporate the locking means for restricting the rotation of the setting wheel 20 as a separate member as in the past, which not only reduces the number of component parts and simplifies the structure, but also improves workability, ease of assembly, etc. It is also excellent in terms of Here, the elastic locking piece 41 described above is attached to the setting box 3 made of synthetic resin.
Since it is formed integrally with 0, it can be elastically deformed, and when the push button 35 is operated to set a numerical value, it is elastically deformed so as to ride over each tooth of the gear part 20b, and holds the setting wheel 20 in a required state. It is something.

The reference numeral 42 in FIG. 1 and the like is a terminal plate for attaching a terminal piece 42a for electrical wiring (not shown) to the electromagnet devices 10, 17 and a micro switch 43 (described later), and is attached to the rear end of the frame 1. It is integrally assembled to the part by a pin 42b.

On the other hand, on the rear end 30b side of the setting box, a micro switch 43 is disposed, which constitutes a signal sending section that sends out an output signal when the numerical value of the counting wheel 6 matches the set numerical value. As shown in FIGS. 1 and 3, a metal presser plate 44 is mounted and engaged with locking pieces 45a and 45b. The signal control is performed between the bottom of the box 30 and the tip of the support piece 44b extending from one end of the notch 44a formed at the center of the front end of the presser plate 44 toward the center. A signal control lever 46 (see FIG. 3) that engages with the bracket member 25 is rotatably supported. That is,
One end of this signal control lever 46 extends toward the signal control bracket member 25 side, and its tip 46a
is engaged with a circular cam 47 pivotally supported by the bracket member 25 while being biased in one direction. During this engagement, the other end 46b of the signal control lever 46 is engaged with the tip roller 48a of the leaf spring piece 48 that closes the contact 43a of the microswitch 43.

Therefore, according to such a signal sending section,
When the values of the counting wheel 6 and the setting wheel 20 all match, the signal control bracket member 25 moves, and the cam 47 and the signal control lever 46 are disengaged, and this lever 46 rotates clockwise in FIG. Then, the micro switch 43 is opened and an output signal is sent out. Further, when the counter wheel 6 is returned to zero manually or automatically, and the upper end portion 19a of the return lever responds to this and rotates forward, the portion 4 of the lever 46 that protrudes laterally at one end
6c, this lever 46 is rotated counterclockwise to return to its original state, that is, a state in which the micro switch 43 is maintained in the closed state, and the bracket member 25 is also moved toward the setting cam gear 2.
1 is removed from the setting wheel 20, it returns to its original state and becomes engaged with the cam 47.

The reason why the cam 47 is used to engage the lever 46 is to facilitate engagement and disengagement by movement of the bracket member 25. In addition, what is indicated by 30c in FIG.
This is a shaft support that pivotally supports the signal control lever 46.

Furthermore, in this embodiment, the push-button output switching prevention lever 50 is biased toward the front of the frame 1 in order to keep the micro switch 43 in an inactive state, that is, in a closed state when changing the set numerical value during counting. It is arranged so that it can move freely in the front and rear directions. As is clear from FIG.
a, and is supported slidably in the front-rear direction along the inner surface of one side plate 2 of the frame 1.
The rear end of this lever 50 and the frame side plate 2
A forward biasing force is constantly applied by a spring 51 stretched between the two. In this case, the lever 50 has guide grooves 50b and 50c (see FIG. 4) extending in the longitudinal direction near its center,
The support shaft 4 of the setting wheel 20 and the support shaft 24 of the signal control bracket member 25 are fitted into the guide grooves 50b, 50c, and play the role of guiding the lever 50 and regulating the amount of movement in the longitudinal direction.

An engaging portion 52 extending in a direction perpendicular to the direction of movement of the output switching prevention lever 50 is integrally provided at the rear end of the output switching prevention lever 50, and its tip is located on the switch activation side of the signal control lever 46. It is configured to be able to engage with the provided bulge 46e. As shown in FIGS. 1 and 2, this output switching prevention lever 5 is provided at the front end of the cover 15.
An operation hole 53 is formed corresponding to the operation hole 53, and the push button portion 50a is projected outward through this operation hole 53.

In such a configuration, when the output switching prevention lever 50 is pressed, the entire frame moves toward the rear of the frame, and the engaging portion 52 engages with the bulging portion 46e of the signal control lever 46, preventing its rotation. This makes it possible to control the microswitch 43 and keep the microswitch 43 in a non-operating state. If this pressed state is maintained and the value setting push button 35 is operated to change the set value of the setting wheel 20, even if the values of the setting wheel 20 and the counting wheel 6 match, the switch 43
remains closed and no operational problems occur once the output signal is sent. Further, since this operation has no effect on the counting wheel 6 side, there is an advantage that there is no need to stop the transmission of counting pulses, and the counting operation can be continued.

Further, in the above-mentioned embodiment device, the following structure is adopted in consideration of workability and assemblability of each part, but detailed explanation thereof will be omitted.

It goes without saying that the present invention is not limited to the structure of the embodiment described above, and that the shape and structure of each part, as well as the arrangement position thereof, can be changed as appropriate.

〔Effect of the invention〕

As explained above, according to the preset counter of the present invention, the setting mechanism section including the numerical value setting push button for setting the numerical value of the setting wheel is integrated into a synthetic resin setting box, and this is assembled into a unit. Since it is designed to be detachably assembled to the counter frame, the configuration of each part is simplified, greatly improving workability and ease of assembly, and significantly reducing manufacturing costs. does not cause any problems in terms of assembly,
It has advantages such as excellent operational reliability and operability.

According to the present invention, a push button for numerical value setting is removably assembled in the storage groove formed in the above-mentioned synthetic resin setting box, and an elastic button integrally protrudes from the lower side of the setting box. Since the free movement of the setting wheel is restricted by a stopper, there is no need for extra parts compared to conventional models, the structure is simplified, and each part has excellent workability and ease of assembly, achieving cost reduction. There are various excellent effects that can be achieved.

[Brief explanation of drawings]

The figures show one embodiment of the preset counter according to the present invention, in which Fig. 1 is an exploded perspective view showing the overall general configuration, Fig. 2 is a front view showing its assembled state, and Fig. 3 is FIG. 4 is a left side view, FIG. 5 is a right side view, FIGS. 6 a and b are a side view and sectional view of the setting wheel, and FIGS. b is a side view and a sectional view of the setting cam gear, FIG. 8 is a side view of the setting box that characterizes the present invention, FIG. 9 is a side view of the numerical setting push button and its biasing spring, and FIG. FIG. 6 is a partially omitted side view showing a state in which the elastic locking piece of the setting box and the engaging element of the numerical value setting push button are engaged with the gear portion of the setting wheel. 1... Frame, 1a... Frame bottom plate, 2,
3... Frame side plate, 4, 5... Support shaft, 6... Counting wheel, 10... Counting electromagnet device, 11... Armature, 13... Zero return slide plate, 14...
...Support bracket member, 15...Cover, 15
a, 15b...display window, 16...zero return push button, 1
7... Zero return electromagnet device, 18... Armature, 20... Setting wheel, 20b... Gear portion, 21...
... Setting cam gear, 25 ... Signal control bracket member, 30 ... Setting box, 35 ... Push button for numerical value setting, 36 ... Storage groove, 37 ... Spring, 3
8...Cover side hole, 39...Hood, 40...
Engagement element, 41... Elastic engagement piece, 43... Micro switch, 46... Signal control lever.

Claims (1)

[Claims] 1 A counting wheel and a setting wheel each rotatably mounted on a pair of support shafts supported between a counter frame and its opposing side plates, and an engaging element that engages with the setting wheel, and setting is performed by a pressing operation. In the preset counter, the preset counter is provided with a numerical value setting push button for sequentially rotating the wheels to a set value, and is configured to detect and send an output signal when the counting wheel matches a set numerical value of the set wheel. A push button for setting numerical values is slidably incorporated, and a setting box made of synthetic resin is detachably assembled to the counter frame, and the setting box includes:
A preset counter characterized in that an elastic locking piece is integrally formed to lock a gear portion on a setting wheel side that is engaged with an engager of the numerical value setting push button and to restrict its movement.