JPH0457946B2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to a method for installing a detector in an auger-type ice maker, and in particular, a method for installing a detector in an auger-type ice maker to detect wear of the shaft portion. This is to improve the mounting accuracy of bearing wear contact detectors.

b. Prior art Figure 5 shows bearing wear in an auger-type ice maker shown in Utility Application No. 18239/1983 (see Utility Model Application No. 130374/1983) previously filed by the applicant. This is a structural diagram of the electrode of the contact detector 20. The bearing wear contact detector 20 has a structure in which the electrode plate 22 is molded in a resin 21 with the tip 22a exposed, and is fitted into the upper part of the refrigeration casing 2. At the upper part of the pressed head 4, the upper shaft part 3a of the auger 3
They are installed at a constant distance A. As a result, when the ice-making water interposed between the tip portion 22a and the upper shaft portion 3a gets dirty and the electrical resistance value drops below a predetermined value, or when the bearing 6 wears out by a predetermined amount A and the upper shaft portion A bearing wear contact detection signal is generated by detecting when the bearing 3a and the tip 22a come into contact and the resistance value between them becomes approximately zero resistance value.

c Problems to be Solved by the Invention In the electrode structure configured as shown in Fig. 5, since the bearing wear contact detector is a resin molded product, the outer circumferential fitting surface of the bearing wear contact detector and the electrode plate It is difficult to ensure the accuracy of the concentricity of the inner diameter. In addition, there are problems with the accuracy of the fit when fixing the bearing wear contact detector to the press head, so it is necessary to ensure the accuracy of the concentricity between the inner diameter of the electrode plate and the inner diameter of the bearing press-fitted into the press head. It is difficult to ensure the distance A between the inner diameter of the electrode plate and the auger upper shaft, and as a result, the auger upper shaft 3a and the tip 22a of the electrode plate 22 come into contact with each other below the amount of bearing wear, making it impossible to detect bearing wear contact. There was a problem in that it was not possible to prevent malfunctions such as issuing a signal and stopping the ice making operation.

d Means for Solving the Problem This invention was made to solve the problem, and the center of the inner diameter of the electrode plate of the detector is determined using the inner surface of the bearing press-fitted into the pressing head as a reference plane. To provide a method for mounting a detector, which makes it possible to mount the detector with high accuracy by placing the electrode plate on the pressing head with an adhesive or filler having excellent electrical insulation properties. The purpose is

In order to achieve this object, according to the present invention, an electrode plate 12 is arranged at a constant interval from the auger upper shaft portion 3a which is supported by a bearing 6 press-fitted into the inner surface 4f of the press head 4 of the refrigeration casing 2. In this way,
In order to attach the detector 10 having the electrode plate 12, a recess 4a for arranging the detector is formed in the pressing head, an insulating material 11 is arranged on the bottom surface 4c of the recess, and the insulating material is a first body portion 16A having a first diameter substantially the same as the inner diameter of the bearing; a second body portion 16B having a second diameter substantially the same as the inner diameter of the second body portion 16B;
Insert a jig 16 formed from the above into the hole of the press head, and then fill the recess of the press head with an electrically insulating filler 14 while the jig remains inserted. A method for attaching a detector is provided.

e Effect In the above configuration of the present invention, since the first body part and the second body part of the jig are formed concentrically, the accuracy of the concentricity between the electrode plate inner diameter and the bearing inner diameter can be ensured. Therefore, it is possible to maintain an equal distance between the inner diameter of the electrode plate and the auger upper shaft portion supported by the bearing.

f. Example Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an auger-type ice-making mechanism 1, and as described above in FIG. A bearing 6 is press-fitted into the pressing head 4 provided at the upper part, and the auger 3 is rotatably supported by the bearing 6.

The lower part of the refrigeration casing 2 is attached to a drive device 7 via a housing 5 with a bearing 6 . The output shaft 8 of the drive device 7 has a spline joint 9
The auger 3 is connected to the lower shaft portion 3b at the lower end of the auger 3 via the auger 3, and the auger 3 is driven by the rotation of the output shaft 8 of the drive device 7.

FIGS. 2 and 3 are structural diagrams of a pressure head 4 and a detector, that is, a bearing wear contact detector 10 formed according to the present invention, and a detector 10 is fixed to the top of the pressure head 4. A groove 4b for passing the lead wire 13 of the detector 10 is formed.
and a convex portion 4e at the upper end. Further, a bearing 6 is fixed to the lower inner surface 4f of the pressing head 4.

To assemble the detector 10, an insulating plate 11 is attached to the bottom surface 4c of the recess 4a of the pressing head 4, and an electrode plate 12 with a lead wire 13 fixed to the upper part of the insulating plate 11 is assembled.
Attach.

Next, a jig 16 for fixing the electrode plate 12 is inserted into the press head 4 as shown in FIG.

As shown in FIG. 4, the approximately cylindrical jig 16 has first body portions 16A formed concentrically with each other.
, a second body portion 16B, and a third body portion 16C.
It has The first body portion 16A includes a bearing 6
It has a first side wall portion 16a having a first diameter substantially the same as the inner diameter of the hole of the bearing 6 and correspondingly contacts the side surface 6a of the bearing 6, and the second body portion 1
6B has a second diameter larger than the first diameter and the same as the inner diameter of the hole of the electrode plate 12, and has a second side wall portion 16b that can be contacted with the inner side surface 12a of the electrode plate 12. are doing. The third body portion 16C has a third diameter larger than the second diameter, and has an electrode holding portion 16c on its lower surface that can fix and hold down the electrode plate 12 from above.

After the jig 16 is installed in the pressing head 4, the lead wire 13 is passed through the groove 4b of the pressing head 4, and then the filler 14 is injected into the upper space, that is, the recess 4a of the pressing head 4, and fixed. While the filler 14 is injected and fixed, the electrode plate 12 is held fixed by the electrode holding part 16c of the jig 16, so that reliable attachment is possible.

When assembling the detector or bearing wear contact detector 10, such use of the jig 16 according to the invention ensures that the concentricity between the inner diameter of the inner side surface 12a of the electrode plate 12 and the inner diameter of the side surface 6a of the bearing 6 is Can be easily secured. Further, the upper convex portion 4e within the concave portion 4a of the pressing head 4 serves to prevent the filler that fixes the detector 10 from coming off. In order to prevent the filler from coming off, the side wall 4d of the recess 4a of the pressing head 4 may be provided with unevenness.

Generally, in the configuration of the auger-type ice making mechanism section 1, the distance B between the inner wall 2a of the frozen casing and the auger peeling blade 3c is
is narrowed to 0.5 mm or less in order to improve the ice-making ability. Therefore, it is necessary to reduce the variation in the interval B to improve the machining accuracy of the parts constituting the ice-making mechanism section 1. Considering the tolerances of each part and the distortion of each part due to the extremely large force applied to each part during ice making, the bearing wear tolerance dimension A must be 0.1 to 0.15 mm smaller than the interval B dimension. , electrode plate 1
An absolute condition for installing the detector 10 is to reduce the variation in the distance A between the inner side surface 12a of the sensor 2 and the upper shaft portion 3a.

According to this invention, when installing the detector 10 on the pressing head 4, the jig 16 can be used to ensure the distance A between the upper shaft portion 3a of the auger and the inner side surface 12a of the electrode plate. Therefore, the detector 10 can generate a signal at the appropriate time to replace the bearing, which prevents wasteful maintenance and inspection due to malfunction and loss to the customer due to replacing a usable bearing. be able to.

g. Effects of the Invention As described above, according to the present invention, when attaching the electrode plate of the bearing wear contact detector to the press head with which the bearing is fixed and integrated, a jig is used and the inner diameter of the bearing is used as a reference. Since the electrode plate can be fixed to the press head, concentricity between the electrode and the bearing can be easily ensured.Furthermore, the convex part provided at the end of the press head prevents the wear detector from moving and detaching. This not only ensures concentricity but also enables reliable detection of bearing wear contact. This enables proper maintenance and effectively prevents serious accidents such as contact between the auger and the refrigeration casing due to bearing wear.

[Brief explanation of the drawing]

Fig. 1 is a side view, partially in section, of an auger-type ice maker to which the present invention is applicable; Figure 3 is a plan view of Figure 2;
FIG. 4 is a structural diagram for explaining the attachment of a bearing wear contact detector to the press head of an auger-type ice maker according to the present invention, and FIG. 5 is a structural diagram for explaining the attachment of a conventional bearing wear contact detector. It is a structural diagram. In the figure, 1 is the ice making mechanism, 2 is the frozen casing, 2a is the inner wall of the frozen casing, 3 is the auger, 3
a is the upper shaft part of the auger, 3b is the lower shaft part of the auger, 4 is the pressing head, 4a is the recessed part, 4b is the groove, 4c is the bottom surface, 4d is the side wall, 4e is the convex part, 4f is the inner surface, 5
is the housing, 6 is the bearing, 6a is the side surface of the bearing, 1
0 is a bearing wear contact detector, 11 is an insulating plate, 12 is an electrode plate, 12a is an inner side surface of the electrode plate, 13 is a lead wire, 14 is a filler, 16 is a jig, 16A, 16
B and 16C are the first, second, and third body parts of the jig, 16a and 16b are the first and second sidewall parts of the jig, respectively, and 16c is an electrode holding part.

Claims (1)

[Scope of Claims] 1. An electrode plate 12 is disposed at a constant interval from the auger upper shaft 3a which is supported by a bearing 6 press-fitted into the inner surface 4f of the press head 4 of the freezing casing 2. In order to attach the detector 10 having the electrode plate 12, a recess 4a for arranging the detector is formed in the pressing head, an insulating material 11 is arranged on the bottom surface 4c of the recess, and the insulating material 11 is placed above the insulating material. a first body portion 16A having a first diameter substantially the same as the inner diameter of the bearing; a second body portion 16B having a second diameter that is substantially the same as the inner diameter;
Insert a jig 16 formed from the above into the hole of the press head, and then fill the recess of the press head with an electrically insulating filler 14 while the jig remains inserted. A method for installing a detector, characterized in that: 2 The jig further includes a third electrode holding part 16c on the lower surface, which has a third diameter larger than the second diameter and can hold down the electrode plate.
The method for attaching a detector according to claim 1, wherein the body portion 16C is formed. 3. The detector according to claim 1 or 2, wherein a convex portion 4e is provided in the concave portion 4a of the pressing head in order to prevent the filler that fixes the electrode plate from coming off. Installation method. 4. Detection according to any one of claims 1 to 3, wherein a side wall 4d of the recess 4a of the pressing head is provided with unevenness in order to prevent the filler that fixes the electrode plate from detaching. How to install the device.