JPH11241958A - Torque detecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach a light shielding ring to the outer circumferential face of a circular flange without causing positional slippage by fixing either one of a first and a second light shielding ring in a first or a second circular flange and carrying out alignment of the other light shielding ring by moving the other light shielding ring in the circumferential direction. SOLUTION: A first and a second light shielding rings 16a, 16b are provided with support rings 18a, 18b fitted in the outer circumferential faces of circular flanges 13a, 13b while keeping an idle. The support rings 18a, 18b are respectively fixed in the outer circumferential faces of the circular flanges 13a, 13b by screws 20 for light shielding ring fixation. The screws 20 for light shielding ring fixation have sharpened tips. Even in the case the screws 20 for light shielding ring fixation are fastened when the light shielding rings 16a, 16b are fixed in the outer circumferential faces of the circular flanges 13a, 13b, the light shielding rings 16a, 16b are prevented from positional slippage. Consequently, without causing positional slippage, the light shielding rings 16a, 16b can be installed and the work torque affecting on a stirring axis 7 can precisely be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque detecting device used for a device for producing semi-frozen beverages mainly using syrup and carbon dioxide.

[0002]

2. Description of the Related Art As an apparatus for producing semi-frozen beverages (hereinafter referred to as "chilled desserts") mainly using syrup and carbon dioxide gas,
The frozen dessert manufacturing apparatus shown in FIG. 5 is disclosed in Japanese Patent Application Laid-Open No. 7-39314. In FIG. 5, reference numeral 1 denotes a freezing casing, and the freezing casing 1 is provided horizontally on a stand (not shown). Reference numeral 2 denotes a casing lid for closing an opening formed at one end of the frozen casing 1 in a liquid-tight manner. The casing lid 2 has a pouring cock 3 for pouring frozen dessert from inside the frozen casing 1. Is provided.

[0003] The freezing casing 1 has a cylindrical shape.
A heat insulating layer 4 is formed on the outer periphery of the freezing casing 1. The freezing casing 1 is formed of, for example, stainless steel, and the raw material accommodated in the freezing casing 1 is supplied by a refrigerant flowing through a cooling pipe 5 disposed in a coil shape on the outer peripheral surface of the freezing casing 1. While being cooled, it is stirred by the stirring blades 6a and 6b. These stirring blades 6a and 6b are attached to a stirring shaft 7 provided at the center of the freezing casing 1, and a drive motor 8 for driving the stirring shaft 7 to rotate.
Is installed outside the freezing casing 1.

In order to maintain a good drinking sensation of the frozen dessert produced by such a frozen dessert production apparatus, the ingredients in the frozen casing 1 are continuously stirred by the stirring blades 6a and 6b, and the stirring blades 6a and 6b are also used. It is necessary to control the cooling of the raw material in accordance with the viscous resistance of the raw material to be received. For this reason, the above-mentioned frozen dessert manufacturing apparatus is provided with a torque detecting mechanism 9 for detecting the viscous resistance of the raw material received by the stirring blades 6a and 6b as the load torque of the stirring shaft 7. As shown in FIG. 6, the torque detecting mechanism 9 includes a first cylindrical coupling 10a mounted on a motor shaft 8a of the drive motor 8, and a stirring shaft opposed to the first cylindrical coupling 10a. And a second cylindrical coupling 10b mounted on the first coupling 7a.
Key grooves 11a and 11b (see FIG. 7) are formed on the inner peripheral surface of Ob. A key 12a formed on the motor shaft 8a of the drive motor 8 and a key 12b formed on the stirring shaft 7 are engaged with these key grooves 11a and 11b, respectively. 8a and the stirring shaft 7 are integrally rotated.

On the other hand, a first annular flange 13a and a second annular flange 13a are formed on the outer peripheral surfaces of the couplings 10a and 10b. These annular flanges 13a and 13b are opposed to each other, and
3a and 13b, hook portions 14a, 1
A torsion coil spring 14 having 4b is interposed. The hooks 14a, 14b of the torsion coil spring 14 have pins 15a, 1a provided on the annular flanges 13a, 13b.
5b is engaged, and the rotational force of the drive motor 8 is changed to the first force via the pins 15a and 15b and the torsion coil spring 14.
From the coupling 10a to the second coupling 10b.

Further, as shown in FIG. 7, the torque detecting mechanism 9 includes a first light-shielding ring 16a and a second light-shielding ring 16b opposed to each other. These light-shielding rings 16a, 16b are provided on the outer periphery of the annular flanges 13a, 13b. Near the outer periphery of the annular flanges 13a, 13b, the first coupling 10a is formed by a slit formed by the light-shielding rings 16a, 16b. A displacement detector 17 (see FIG. 5) for optically detecting a relative displacement between the second coupling 10b and the second coupling 10b is provided.

[0007] The first light-shielding ring 16a and the second light-shielding ring 16b are provided with support rings 18a and 18b which are loosely fitted on the outer peripheral surfaces of the annular flanges 13a and 13b.
These support rings 18a, 18b are fixed to the outer peripheral surfaces of the annular flanges 13a, 13b by a plurality of (for example, three) light-shielding ring fixing screws 19.

In the torque detecting mechanism 9 configured as described above, when the load torque of the stirring shaft 7 increases, the relative displacement between the first coupling 10a and the second coupling 10b also increases. Conversely, when the load torque of the stirring shaft 7 decreases, the first coupling 10a and the second coupling 10a
Is relatively small with respect to the coupling 10b. Therefore, the first coupling 10a and the second coupling 1
By detecting the relative displacement with respect to 0b by the displacement detector 17, it is possible to accurately detect the load torque of the stirring shaft 7.

[0009]

However, in the above-described torque detecting mechanism, a set screw having a flat tip is used as the light-shielding ring fixing screw 19, so that the light-shielding ring fixing screw 19 is tightened to tighten the light-shielding ring fixing screw 19. 16a,
When fixing the 16b to the outer peripheral surfaces of the annular flanges 13a, 13b, the light-shielding rings 16a, 16b may be displaced. For this reason, conventionally, the light-shielding rings 16a, 1
Since the light-shielding ring fixing screw 19 must be carefully tightened so that the position of the light-shielding ring 6b does not shift, the light-shielding ring 1
There was a problem that it took time to attach the 6a and 16b.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to attach a light-shielding ring to an outer peripheral surface of an annular flange without causing a displacement when fixing the light-shielding ring to the outer peripheral surface of the annular flange. It is an object of the present invention to provide a torque detecting device capable of performing the above-described operations.

[0011]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a stirring shaft for stirring a frozen dessert material in a frozen casing, a drive motor for rotating and driving the stirring shaft, A first coupling mounted on a motor shaft of a drive motor; a second coupling mounted on the stirring shaft opposite to the first coupling;
A first annular flange formed on the coupling, a second annular flange formed on the second coupling facing the first annular flange, a second annular flange, and the second annular flange. A torsion coil spring interposed between the first and second annular flanges, and a pair of pins for transmitting the rotational force of the drive motor from the first coupling to the second coupling via the torsion coil spring; The first coupling and the second coupling are formed by a slit formed by a first light shielding ring provided on the outer periphery of the first annular flange and a second light shielding ring provided on the outer periphery of the second annular flange. And a displacement detector that optically detects a relative displacement with the second coupling, wherein the first light-shielding ring and / or the second light-shielding ring are
A tip is fixed to the outer peripheral surface of the first annular flange and / or the second annular flange by a plurality of sharp-pointed screws. According to a second aspect of the present invention, there is provided a first coupling mounted on a motor shaft of a drive motor that rotationally drives a driven shaft, and a second coupling mounted on the driven shaft opposed to the first coupling. And the first
A first annular flange formed on the coupling, a second annular flange formed on the second coupling facing the first annular flange, a second annular flange, and the second annular flange. A torsion coil spring interposed between the first and second annular flanges, and a pair of pins for transmitting the rotational force of the drive motor from the first coupling to the second coupling via the torsion coil spring; The first coupling and the second coupling are formed by a slit formed by a first light shielding ring provided on the outer periphery of the first annular flange and a second light shielding ring provided on the outer periphery of the second annular flange. A displacement detector that optically detects a relative displacement with respect to the second coupling, wherein one of the first light-shielding ring and the second light-shielding ring is the first light-shielding ring. It is fixed to the annular flange or the second annular flange, characterized in that by moving the other light shielding ring in the circumferential direction to position the light shielding ring.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those shown in FIGS. 5 to 7 are denoted by the same reference numerals. FIG. 1 is a cross-sectional view showing a first embodiment of the present invention. As shown in FIG. 1, the viscous resistance of the raw material is applied to the connection between the stirring shaft 7 and the motor shaft 8a. A torque detecting mechanism 9 for detecting as torque is provided. This torque detecting mechanism 9 is a first cylindrical coupling 10a mounted on a motor shaft 8a.
And a second cylindrical coupling 10b mounted on the stirring shaft 7 so as to face the first cylindrical coupling 10a, and a first cylindrical coupling is provided on an outer peripheral surface of the coupling 10a, 10b. An annular flange 13a and a second annular flange 13a are formed. In addition, the coupling 10a
A key groove (not shown) for engaging with a key 12a formed on the motor shaft 8a is formed on an inner peripheral surface of the coupling 1.
On the inner peripheral surface of Ob, a key groove (not shown) that engages with a key 12b formed on the stirring shaft 7 is formed.

The first annular flange 13a and the second annular flange 13b face each other, and a torsion coil spring 14 is interposed between these annular flanges 13a and 13b. The torsion coil spring 14 has hook portions 14a and 14b at both ends, and pins 15a and 15b are engaged with these hook portions. These pins 1
5a and 15b are fixed to opposed flange surfaces of the annular flanges 13a and 13b.
The rotational force of the drive motor 8 is transmitted from the first coupling 10a to the second coupling 10b via the torsion coil spring 14 and 15b.

The torque detecting mechanism 9 includes a first light-shielding ring 16a and a second light-shielding ring 16b facing each other. These light-shielding rings 16a, 16b are provided on the outer periphery of the annular flanges 13a, 13b. Near the outer periphery of the annular flanges 13a, 13b, the first coupling 10a is formed by a slit formed by the light-shielding rings 16a, 16b. A displacement detector 17 for optically detecting a relative displacement between the first coupling 10b and the second coupling 10b is provided.

The first light-shielding ring 16a and the second light-shielding ring 16b are provided with support rings 18a and 18b which are loosely fitted on the outer peripheral surfaces of the annular flanges 13a and 13b. These support rings 18a, 18b are respectively fixed to the outer peripheral surfaces of the annular flanges 13a, 13b by a plurality of (for example, three) light-shielding ring fixing screws 20, and each light-shielding ring fixing screw 20 is, as shown in FIG. The tip is pointed.

In the above-described first embodiment, since the light-shielding ring fixing screw 20 has a sharp point, when the light-shielding rings 16a and 16b are fixed to the outer peripheral surfaces of the annular flanges 13a and 13b, the light-shielding ring fixing screws are used. Even if the screw 20 is tightened, the light-shielding rings 16a and 16b do not shift. Therefore, the light-shielding rings 16a, 16b can be attached to the outer peripheral surfaces of the annular flanges 13a, 13b without causing displacement when attaching the light-shielding rings 16a, 16b to the outer peripheral surfaces of the annular flanges 13a, 13b. Can be accurately detected.

FIG. 3 is a sectional view showing a second embodiment of the present invention. As shown in FIG.
A torque detecting mechanism 9 for detecting the viscous resistance of the raw material as a load torque of the stirring shaft 7 is provided at a connection portion with a. The torque detecting mechanism 9 includes a first cylindrical coupling 10a mounted on a motor shaft 8a, and a second cylindrical coupling mounted on the stirring shaft 7 opposite to the first cylindrical coupling 10a. 10b. A first annular flange 13a and a second annular flange 13a are formed on the outer peripheral surfaces of the couplings 10a and 10b. The motor shaft 8 is provided on the inner peripheral surface of the coupling 10a.
A key groove (not shown) is formed to engage with the key 12a formed in the coupling a. A square hole is formed in the center of the coupling 10b so that the shaft end is fitted with the stirring shaft 7 having a square cross section. Have been.

The first annular flange 13a and the second annular flange 13b face each other, and a torsion coil spring 14 is interposed between the annular flanges 13a and 13b. The torsion coil spring 14 has hook portions 14a and 14b at both ends, and pins 15a and 15b are engaged with these hook portions. These pins 1
5a and 15b are fixed to opposed flange surfaces of the annular flanges 13a and 13b.
The rotational force of the drive motor 8 is transmitted from the first coupling 10a to the second coupling 10b via the torsion coil spring 14 and 15b.

The torque detecting mechanism 9 has a first light-shielding ring 16a and a second light-shielding ring 16b facing each other. These light-shielding rings 16a, 16b are provided on the outer periphery of the annular flanges 13a, 13b. Near the outer periphery of the annular flanges 13a, 13b, the first coupling 10a is formed by a slit formed by the light-shielding rings 16a, 16b. A displacement detector 17 for optically detecting a relative displacement between the first coupling 10b and the second coupling 10b is provided.

The first light-shielding ring 16a has a support ring 18a which is loosely fitted on the outer peripheral surface of the first annular flange 13a.
It has. The support ring 18a is fixed to the outer peripheral surface of the annular flange 13a by a plurality (for example, three) of light-shielding ring fixing screws 20, and each light-shielding ring fixing screw 20 has a pointed tip as shown in FIG. ing. The second light-shielding ring 16b is attached to the second annular flange 12b by welding or bonding.

In the above-described second embodiment, since the light-shielding ring fixing screw 20 is pointed, the light-shielding ring is fixed when the first light-shielding ring 16a is fixed to the outer peripheral surface of the first annular flange 13a. Even if the fixing screw 20 is tightened, the light-shielding ring 16a will not be displaced. Therefore, the light shielding ring 16a is provided on the outer peripheral surface of the annular flange 13a.
Can be attached without causing a displacement, whereby the torque acting on the stirring shaft 7 can be accurately detected.

In the second embodiment, since the fixing screw 20 is provided only on the light-shielding ring 16a side, the positioning can be performed only by moving only the light-shielding ring 16a. Rings 16a, 16
The alignment of b can be easily performed. Also, the second
Since the light shielding ring 16b is directly attached to the second annular flange 13b, the number of parts such as the support ring can be reduced.

In the above-described second embodiment, the second light-shielding ring 16b is attached to the second annular flange 13b by welding, bonding, or the like.
a to the first annular flange 13a by welding or bonding or the like.
And the second light-shielding ring 16b may be attached to the outer peripheral surface of the first annular flange 13a by the light-shielding ring fixing screw 20.

[0024]

As described above, according to the present invention,
The first light-shielding ring and / or the second light-shielding ring can be attached to the outer peripheral surface of the first annular flange and / or the second annular flange without causing a positional shift;
Thereby, the stirring torque acting on the stirring shaft via the stirring blade can be accurately detected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a first embodiment of the present invention.

FIG. 2 is an enlarged view of a portion A shown in FIG.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is an enlarged view of a portion B shown in FIG.

FIG. 5 is a cross-sectional view for explaining a schematic configuration of a frozen dessert manufacturing apparatus.

FIG. 6 is a cross-sectional view illustrating a conventional frozen dessert manufacturing apparatus.

FIG. 7 is an exploded perspective view for explaining a conventional frozen dessert manufacturing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Refrigeration casing, 5 ... Cooling pipe, 6a, 6b ... Stirring blade, 7 ... Stirring shaft, 8 ... Drive motor, 8a ... Motor shaft, 9 ... Torque detection mechanism, 10a ... 1st coupling, 10b ... 2nd Coupling 13a: first annular flange, 13b: second annular flange, 14: torsion coil spring, 15a, 15b: pin, 16a: first light-shielding ring, 16b: second light-shielding ring, 17 ... Displacement detectors, 18a, 18b: support ring, 20: screws for fixing light-shielding ring.

Claims (2)

[Claims] 1. A first coupling mounted on a motor shaft of a drive motor that rotationally drives a driven shaft, and a second coupling mounted on the driven shaft in opposition to the first coupling.
A first annular flange formed on the first coupling, a second annular flange formed on the second coupling opposite to the first annular flange, A torsion coil spring interposed between a second annular flange and the first annular flange, and a rotational force of the drive motor from the first coupling to the second torsion coil through the torsion coil spring; From a slit formed by a pair of pins to be transmitted to the coupling, a first light shielding ring provided on the outer periphery of the first annular flange, and a second light shielding ring provided on the outer periphery of the second annular flange. A torque detector including a displacement detector that optically detects a relative displacement between the first coupling and the second coupling, wherein the first light shielding ring and / or the second light shielding ring A torque detecting device, wherein an optical ring is fixed to an outer peripheral surface of the first annular flange and / or an outer peripheral surface of the second annular flange by a plurality of screws having sharp tips. 2. A first coupling mounted on a motor shaft of a drive motor that rotationally drives a driven shaft, and a second coupling mounted on the driven shaft in opposition to the first coupling.
A first annular flange formed on the first coupling, a second annular flange formed on the second coupling opposite to the first annular flange, A torsion coil spring interposed between a second annular flange and the first annular flange, and a rotational force of the drive motor from the first coupling to the second torsion coil through the torsion coil spring; From a slit formed by a pair of pins to be transmitted to the coupling, a first light shielding ring provided on the outer periphery of the first annular flange, and a second light shielding ring provided on the outer periphery of the second annular flange. A torque detector including a displacement detector that optically detects a relative displacement between the first coupling and the second coupling; the first light-shielding ring or the second light-shielding ring; A torque detection device, wherein one of the rings is fixed to the first annular flange or the second annular flange, and the other light-shielding ring is moved in the circumferential direction to position the light-shielding ring.