JPH0355982Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a torque adjustment mechanism for a rotary display unit device attached to a graphic panel and used for various displays.

(Prior Art) Conventionally, as this type of rotary display unit device, a structure shown in FIGS. 2A and 2B has been proposed.

2A and 2B are a plan sectional view and a right side view of the rotary display unit device attached to a graphic panel, respectively, in which 1 is a graphic panel, 2 is a front panel fitted into a part of a graphic panel, 3 is a frame body, 4 and 5 are bearings that pivotally support the rotating shafts 6 and 7, respectively; 8 is a rotating display unit that has display surfaces 8a and 8b and is pivoted on the rotating shafts 6 and 7 and rotates 180 degrees; 9 is a motor, 10 is a gear head, 11 is a drive pulley, 12 is a driven pulley fixed to the rotating shaft 7, 13 is a timing belt, 14 and 15 are a control unit (not shown) and a display surface of the rotation display unit 8, respectively. 8a, 8b are connected through the hollow parts of the rotating shafts 6, 7, and predetermined display information is displayed on the display surfaces 8a, 8b.
This is a bundle of wires for lighting up and displaying.

The rotating display unit 8 of the rotating display unit device configured as described above is driven by a motor 9 operated by a command from a control section via a gear head 10, a driving pulley 11, a driven pulley 12, and a timing belt 13, and displays. The desired display is performed on the surface 8a or the display surface 8b.

(Problems to be Solved by the Invention) However, as shown in the plan sectional view of the main part of the driving force transmission part in FIG. The rotary display unit 8 is fixed to a rotating shaft 7 supported by a rotary shaft 5, and rotates smoothly when a motor 9 operates. When a driving torque other than torque is applied to the rotation display unit 8, this torque is applied to the timing belt 1.
3. Acts on the gear head 10 via the drive pulley 11.

The torque acting on the gear head 10 sometimes exceeds the permissible torque, and as a result, the reduction gear mechanism of the gear head 10 is damaged and the rotation display unit 8 cannot rotate smoothly. It was hot.

The present invention was made to solve the above-mentioned conventional problems, and even when a torque exceeding the allowable torque of the gear head is applied to the rotation display unit, the torque exceeding the allowable limit does not act on the gear head, and The object of the present invention is to provide a torque adjustment mechanism for a rotary display unit device having a rotary display unit rotation function.

(Means for solving the problem) Means for solving the above problem will be explained with reference to FIGS. 1A and 1B corresponding to the embodiment.

The present invention provides a rotary display unit device in which a rotary display unit 8 fixed to a rotating shaft 7 is rotated via a drive pulley 11 and a driven pulley 20 by the operation of a motor 9 to which a gear head 10 is attached. A cylinder having a plurality of grooves t in the axial direction on the outer circumferential surface is inserted between the rotating shaft 7 of No. 8 and the driven pulley 20 on the rotating shaft 7 in the axial direction.
A pair of divided saddles 21a, 21b is interposed between the saddles 21a, 21b within the driven pulley 20.
A pair of pressure contact means 22, 23 for pressure contacting the rotating shaft 7
is provided.

The pressure welding means 22 is a counterbore hole 24 of the saddle 21a.
The key 22a and the compression coil spring 22 that are inserted into the
b. The adjustment screw 22c and the pressure contact means 23 are connected to the key 2 which is fitted into the counterbore hole 24b of the saddle 21b.
3a, a compression coil spring 23b, and an adjustment screw 23c.

(Function) The saddle 21 is
a, 21b are integrated with the driven pulley 20, and the degree of pressure contact is set to the rotating shaft 7 of the saddles 21a, 21b.

Therefore, by setting the torque of the rotating shaft 7 using a torque gauge to match the allowable torque of the gear head 10 using the saddle pressure contact means 22 and 23, the driving force of the motor 9 can be adjusted to the torque of the gear head 10, drive pulley 11, timing belt 13, and driven pulley. 20, saddle 2
1a, 21b, and the rotating shaft 7, and the rotary display unit 8 can be rotated smoothly. Furthermore, when a torque exceeding the allowable torque of the gear head 10 is applied to the rotation display unit 8, the rotating shaft 7 slips on the inner circumferential surface of the saddles 21a and 21b, reducing the torque transmission to the gear head 10 below the allowable level.
The gear head 10 will not be damaged.

(Example) The present invention will be explained below using an example shown in FIGS. 1A and 1B.

FIGS. 1A and 1B are a plan sectional view and a right side view of the main parts of the torque adjustment mechanism, respectively, and the same parts as the conventional ones shown in FIGS. Omitted.

Between the rotating shaft 7 supported by the bearing 5 and the driven pulley 20 on the rotating shaft 7, there are saddles 21a and 21b, which are formed by dividing a cylinder having a plurality of grooves t in the axial direction on the outer circumferential surface into two in the axial direction. is mediated. The inner circumferential surfaces of the saddles 21a and 21b and the outer circumferential surface of the rotating shaft 7 are machined to fit approximately H7 and g7.

A pair of saddle pressure contact means 22 and 23 are built into the driven pulley 20, and the saddle pressure contact means 22 includes a key 22a, a compression coil spring 22b, and an adjustment screw 22.
In c, the saddle pressure contact means 23 is composed of a key 23a, a compression coil spring 23b, and an adjusting screw 23c, respectively.

In addition, at the center of the outer periphery of the saddles 21a and 21b,
Keys 22a, 23a of saddle pressure contact means 22, 23
Counterbore holes 24a and 24b into which one end is inserted, respectively.
is provided.

With these keys 22a and 23a, the saddle 2
1a, 21b and the driven pulley 20 are prevented from shifting in position, and furthermore, the saddles 21a, 21b are pressed against each other.

Further, a plurality of grooves t provided on the outer circumferential surfaces of the saddles 21a and 21b allow the saddle 21 to be aligned with the rotating shaft 7.
This improves the familiarity between a and 21b.

The saddles 21a and 21b each have adjustment screws 22
The compression coil spring 22 is tightened by c and 23c.
The degree of pressure contact with the rotating shaft 7 can be easily adjusted via the keys 22a, 23a.

Therefore, by setting the torque of the rotating shaft 7 using the torque gauge to match the permissible torque of the gear head 10 using the saddle pressure contact means 22 and 23, the rotation display unit 8 can be rotated smoothly, and the rotation display unit 8 can also be set to match the torque of the gear head 10. If a torque greater than the allowable torque is applied manually, for example, the rotating shaft 7 slips on the inner peripheral surfaces of the saddles 21a and 21b, reducing the torque transmission to the gear head 10 to less than the allowable torque, and reducing the reduction gear of the gear head 10. It will not damage the mechanism.

(Effects of the invention) As explained above, according to the invention, excessive torque applied to the rotation display unit is reduced by the slip between the rotating shaft and the saddle, and the gear head is provided with a torque less than the allowable torque for the gear head. Since the rotation display unit can be rotated smoothly without damaging the gear head, there is an advantage that maintenance and inspection of the rotation display unit can be performed easily.

[Brief explanation of drawings]

FIGS. 1A and B are a plan sectional view and a right side sectional view of an embodiment of the present invention, respectively, FIGS. 2A and B are a plan sectional view and a right side view, respectively, of a conventional example;
FIG. 3 is a plan sectional view of a conventional main part. 3... Frame, 7... Rotating shaft, 8... Rotation display unit, 9... Motor, 10... Gear head, 1
1... Drive pulley, 13... Timing belt, 20... Driven pulley, 21a, 21b...
Saddle, 22, 23...Saddle pressure contact means, 22
a, 23a...key, 22b, 23b...compression coil spring, 22c, 23c...adjustment screw, 24...
...Countersunk hole, t...groove.

Claims (1)

[Scope of utility model registration request] In a rotating display unit device in which a rotating display unit fixed to a rotating shaft is rotated via a driving pulley and a driven pulley by the operation of a motor to which a gear head is attached, the rotating shaft of the rotating display unit and the rotating display unit on the rotating shaft are rotated. A pair of saddles made by dividing a cylinder having a plurality of grooves in the axial direction on the outer peripheral surface into two in the axial direction are interposed between the driven pulley and the pair of saddles, and the pair of saddles are inserted into the driven pulley to rotate the rotation display unit. A torque adjustment mechanism for a rotary display unit, characterized in that a pair of press-contact means are provided for press-contacting the shaft.