Patent Publication Number: US-11378320-B2

Title: Ice maker

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     The present application claims priority under 35 U.S.C. § 119 to Japanese Application No. 2018-187428 filed Oct. 2, 2018, and the entire content of which is incorporated herein by reference. 
     BACKGROUND 
     Field of the Invention 
     The present invention relates to an ice maker in which a driving unit causes an ice making tray to perform a flip operation and a twist operation. 
     Description of the Related Art 
     In an ice maker installed in a refrigerator, a water storage concave unit of an ice making tray is filled with water from a water supply tank through a water supply pipe, and when ice making is completed, a driving unit flips the ice making tray around an axis extending in a first direction and then twists the ice making tray, so that the ice is dropped into an ice storage container. Here, the driving unit is arranged on one side in the first direction with respect to the ice making tray, and is supported by a common frame together with the ice making tray. The frame has a first side plate unit and a second side plate unit on both sides in a second direction (width direction) intersecting the first direction of the ice making tray. An ice detecting lever is arranged between the second side plate unit of the frame and the ice making tray, and the first side plate unit is fixed to the refrigerator main body when the ice maker is installed in the refrigerator. The driving unit uses a motor as a drive source, and is supplied with power via a wire drawn from the driving unit to the outside of the frame. 
     In ice makers described in Japanese Unexamined Patent Application Publication No. 2011-89758 and 2015-132448, if a wire is not supported by a frame and is directly drawn out from a driving unit to the outside of the frame, handling of the wire takes a lot of time and effort. Therefore, it is conceivable to provide a wire support structure in a first side plate unit. For example, when a through unit is provided in the first side plate unit and the wire is routed through the through unit, the midway portion of the wire is supported by the through unit. 
     However, in an ice maker of the type in which the driving unit causes an ice making tray to perform a twist operation, a large force is applied to the frame when the driving unit causes the ice making tray to perform the twist operation. Thus, if the through unit is formed in the first side plate unit, stress is concentrated on the vicinity of the through unit of the first side plate unit, which may damage the first side plate unit. Further, if an attachment unit for attaching the ice maker to a support is provided in the first side plate unit, the force applied to the frame when the ice making tray is caused to perform the twist operation concentrates on a connection portion between the attachment unit and the first side plate unit, which may damage the connection portion. 
     SUMMARY 
     To solve the above problems, an ice maker according to at least an embodiment of the present invention includes: an ice making tray including a water storage concave unit arranged to face upward; a driving unit arranged on one side in a first direction intersecting an up-down direction with respect to the ice making tray, the driving unit being structured to cause the ice making tray to perform a flip operation and a twist operation around an axis extending in the first direction; a frame structured to support the ice making tray and the driving unit; and a wire passing through a through unit of the frame from the driving unit and drawn out of the frame, wherein the frame includes a first side plate unit extending in the first direction on one side in a second direction intersecting the up-down direction and the first direction with respect to the ice making tray, and the first side plate unit includes an inner wall facing the other side in the second direction, the inner wall includes a first inner wall portion extending in the first direction along the driving unit, a second inner wall portion extending in the first direction along the ice making tray on the other side in the second direction with respect to the first inner wall portion, and a step unit extending in a direction intersecting the first direction to connect the first inner wall portion and the second inner wall portion, and the through unit is provided in the step unit. 
     In at least an embodiment of the present invention, the through unit is provided in the first side plate unit of the frame structured to support the ice making tray, and the wire connected to the driving unit is passed through the through unit and drawn out of the frame. The step unit is provided on the inner wall of the first side plate unit, and the through unit is provided in the step unit. Therefore, the thickness of the first side plate unit in the second direction can be increased by a thickness corresponding to the step unit provided on the inner wall, thereby making it possible to secure the strength of the first side plate unit. Therefore, deformation or damage of the frame can be suppressed. Further, since the step unit intersects the direction (first direction) in which the first side plate unit extends, the through unit can be provided to penetrate the first side plate unit in the first direction. As a result, when the wire is drawn out from the inside to the outside of the frame through the through unit, the wire can be drawn out without being greatly bent. 
     In at least an embodiment of the present invention, it is preferable that the step unit is located on the one side in the second direction at a coupling position where the driving unit and the ice making tray are coupled to each other. With this arrangement, the first side plate unit has a portion on the ice making tray side with respect to the coupling position with an increased thickness in the second direction, thereby making it possible to secure the strength of the first side plate unit and suppress damage to the first side plate unit accordingly. Further, since the thickness of the first side plate unit can be increased by utilizing an empty space around the ice making tray, securing the strength of the first side plate unit makes it possible to prevent the size of the ice maker in the second direction from increasing. 
     In at least an embodiment of the present invention, it is preferable that the first side plate unit includes an outer wall facing the one side in the second direction, the outer wall includes a plurality of reinforcing ribs protruding to the one side in the second direction, the through unit is provided in a gap between the reinforcing ribs, and tip end faces of the plurality of reinforcing ribs are located on a same plane, and the tip end faces are an attachment flat surface structured to abut against a support structured to support the ice maker. With this arrangement, the strength of the first side plate unit can be secured by the reinforcing ribs, and a space for drawing the wire can be secured in the gap between the reinforcing ribs. Further, the ice maker can be attached to the support with the tip end faces (attachment flat surfaces) of the reinforcing ribs coming into contact with the support. That is, the ice maker can be attached such that the first side plate unit is supported by the support. Thus, the deformation and damage of the first side plate unit can be suppressed. 
     In at least an embodiment of the present invention, it is preferable that the driving unit flips the ice making tray from a water storage position where the water storage concave unit faces upward to an ice removal position where the water storage concave unit faces downward, and vice versa, and the ice removal position is a position such that an opening direction of the water storage concave unit faces an opposite side to a side on which the first side plate unit is located. With this arrangement, the side on which an ice is dropped from the ice making tray can be opposite to the side on which the wire is drawn (that is, the side on which the first side plate unit is located). 
     In at least an embodiment of the present invention, it is preferable that the ice making tray is made of a flexible material, and the frame includes an abutment unit structured to abut against the ice making tray from the side on which the first side plate unit is located when the ice making tray is flipped around the axis to reach the ice removal position from the water storage position and to prevent rotation of the ice making tray. With this arrangement, when the ice making tray is moved to the ice removal position to remove the ice, a force applied from the ice making tray to the frame is a force to press the first side plate unit against the support. Therefore, the first side plate unit can be supported by the support, thereby making it possible to suppress deformation and damage of the first side plate unit. 
     In at least an embodiment of the present invention, the frame includes a second side plate unit extending in the first direction on the other side in the second direction with respect to the ice making tray, and an ice detecting member supported to be movable in an up-down direction is arranged between the second side plate unit and the ice making tray. With this arrangement, the wire can be drawn to an opposite side to a side on which an ice is dropped from the ice making tray (that is, the side on which the ice detecting member is arranged). 
     In at least an embodiment of the present invention, it is preferable that the through unit is a cutout provided at a lower end or an upper end of the first side plate unit. With this arrangement, a work of passing the wire through the through unit is easy. 
     According to at least an embodiment of the present invention, the through unit is provided in the first side plate unit of the frame structured to support the ice making tray, and the wire connected to the driving unit is passed through the through unit and drawn out of the frame. The step unit is provided on the inner wall of the first side plate unit, and the through unit is provided in the step unit. Therefore, the thickness of the first side plate unit in the second direction can be increased by a thickness corresponding to the step unit provided on the inner wall, thereby making it possible to secure the strength of the first side plate unit. Therefore, deformation or damage of the frame can be suppressed. Further, since the step unit intersects the direction (first direction) in which the first side plate unit extends, the through unit can be provided to penetrate the first side plate unit in the first direction. As a result, when the wire is drawn out from the inside to the outside of the frame through the through unit, the wire can be drawn out without being greatly bent. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Embodiments will now be described, by way of example only, with reference to the accompanying drawings which are meant to be exemplary, not limiting, and wherein like elements are numbered alike in several Figures. 
         FIG. 1  is a perspective view of an ice maker to which at least an embodiment of the present invention is applied, as viewed on the side on which a second side plate unit is located and obliquely from above. 
         FIG. 2  is an exploded perspective view of the ice maker of  FIG. 1 , as viewed on the side on which the second side plate unit is located and obliquely from above. 
         FIG. 3  is a perspective view of the ice maker with an ice making tray being at a water storage position, as viewed on a side on which a first side plate unit is located and obliquely from below. 
         FIG. 4  is a perspective view of the ice maker with an ice making tray being at an ice removal position, as viewed on the side on which the first side plate unit is located and obliquely from below. 
         FIG. 5  is an exploded perspective view of the ice maker of  FIG. 1 , as viewed on the side on which the first side plate unit is located and obliquely from above. 
         FIG. 6  is a cross-sectional view of the ice maker of  FIG. 1  taken at a position of a wire arrangement unit. 
     
    
    
     DETAILED DESCRIPTION 
     With reference to the drawings, at least an embodiment of the present invention will be described below. 
     (Overall Configuration) 
       FIG. 1  is a perspective view of an ice maker  1  to which at least an embodiment of the present invention is applied, as viewed on a side on which a second side plate unit  42  is located and obliquely from above.  FIG. 2  is an exploded perspective view of the ice maker  1  of  FIG. 1 , as viewed on the side on which the second side plate unit  42  is located and obliquely from above.  FIG. 3  is a perspective view of the ice maker  1  with an ice making tray  2  being at a water storage position  2 A, as viewed on a side on which a first side plate unit  41  is located and obliquely from below.  FIG. 4  is a perspective view of the ice maker  1  with the ice making tray  2  being at an ice removal position  2 B, as viewed on the side on which the first side plate unit  41  is located and obliquely from below.  FIG. 5  is an exploded perspective view of the ice maker  1  of  FIG. 1 , as viewed on the side on which the first side plate unit  41  is located and obliquely from above. 
     The ice maker  1  is installed in a refrigerator. As illustrated in  FIG. 1 , the ice maker  1  includes the ice making tray  2 , a driving unit  3  structured to flip the ice making tray  2 , and a frame  4  structured to support the ice making tray  2  and the driving unit  3 . The ice making tray  2  has a substantially rectangular shape whose plane shape is long in a first direction X. The ice making tray  2  includes a plurality of water storage concave units  20  structured to store water supplied from a water supply pipe (not illustrated). The driving unit  3  flips the ice making tray  2  around an axis L 0  passing in the longitudinal direction through a center portion in the shorter direction of the ice making tray  2 . The ice maker  1  drops the ice of the ice making tray  2  into an ice storage container (not illustrated) by a flip operation and a twist operation of the ice making tray  2 . 
     An output shaft  32  (see  FIG. 2 ) of the driving unit  3  is coupled to an end portion on one side of the ice making tray  2  in the direction of the axis L 0 . Drive of the driving unit  3  rotates the ice making tray  2  from the water storage position  2 A where the water storage concave units  20  face upward to the ice removal position  2 B where the water storage concave units  20  face downward, and vice versa. In  FIG. 1  and  FIG. 3 , the ice making tray  2  is arranged at the water storage position  2 A. In  FIG. 4 , the ice making tray  2  is arranged at the ice removal position  2 B. 
     As illustrated in  FIG. 1  and  FIG. 3 , the ice maker  1  places the ice making tray  2  in the water storage position  2 A and stores water supplied from the water supply pipe in the water storage concave units  20  of the ice making tray  2  to make ice. When the ice making is completed, as illustrated in  FIG. 4 , the ice maker  1  drives the driving unit  3  to flip the ice making tray  2  from the water storage position  2 A to the ice removal position  2 B, and drop the ice of the ice making tray  2  into an ice storage container (not illustrated) placed below the ice maker  1 . 
     In the following description, three directions orthogonal to one another are referred to as the first direction X, a second direction Y, and a third direction Z. The first direction X is the direction of the axis L 0  of the ice making tray  2 . The third direction Z is an up-down direction in the installation posture of the ice maker  1  (the posture illustrated in  FIG. 1 ). The second direction Y is a direction orthogonal to the direction of the axis L 0  and the up-down direction. Further, in the first direction X, the side on which the driving unit  3  is located is referred to as one side X 1 , and the side on which the ice making tray  2  is located is referred to as the other side X 2 . In the third direction Z, the upper side is referred to as one side Z 1  and the lower side is referred to as the other side Z 2 . Further, in the second direction Y, the direction in which the openings of the water storage concave units  20  face when the ice making tray  2  rotates around the axis L 0  in a CCW direction (first rotation direction) from the water storage position  2 A toward the ice removal position  2 B is referred to as one side Y 1 , and the opposite side thereof is referred to as the other side Y 2 . 
     (Ice Making Tray) 
     The ice making tray  2  is made of an elastically deformable material (flexible material). In the present embodiment, the ice making tray  2  is made of a resin material. As illustrated in  FIG. 2 , the ice making tray  2  includes a substantially quadrangular frame unit  25  and the water storage concave units  20  arranged inside the frame unit  25 . The water storage concave units  20  are arranged in five rows in the first direction X as pairs of two water storage concave units  20  arranged in the second direction Y. In a first wall unit  26  provided on one side X 1  of the frame unit  25  in the first direction X, a coupling unit (not illustrated) coupled to the output shaft  32  of the driving unit  3  is formed. Further, in a second wall unit  27  provided on the other side X 2  in the first direction X of the frame unit  25 , a shaft unit  28  rotatably supported by the frame  4  is formed. 
     In the second wall unit  27  of the ice making tray  2 , a rotation restriction unit  29  structured to abut against the frame  4  when the ice making tray  2  is rotated around the axis L 0  is formed. The ice maker  1  causes the ice making tray  2  to perform the twist operation by the rotation restriction unit  29  preventing the rotation of the ice making tray  2 . The rotation restriction unit  29  protrudes from the second wall unit  27  to the other side X 2  in the first direction X. On the one side Z 1  (upper side) of the rotation restriction unit  29  in the third direction Z, a water receiving unit  30  structured to receive water supplied to the ice making tray  2  via a water channel  10  of the frame  4  is formed. The water receiving unit  30  communicates with the water storage concave units  20  via a cutout of the frame unit  25 . 
     In the ice making tray  2 , convex units  21  reflecting the shape of the water storage concave units  20  are arranged on a lower surface  2   a  facing the other side Z 2  in the third direction Z. A thermistor (not illustrated) structured to sense a temperature of the ice making tray  2  is arranged on the lower surface  2   a  of the ice making tray  2 . The thermistor is covered with a cover  9  (see  FIG. 3 ) fixed to the lower surface  2   a  of the ice making tray  2 . 
     (Driving Unit) 
     As illustrated in  FIG. 2  and  FIG. 5 , the driving unit  3  includes a casing  31  formed in a cuboid shape. The casing  31  houses a motor (not illustrated) serving as a drive source, a rotation transmission mechanism (not illustrated) structured to transmit the rotational force of the motor, and a cam gear  33  to which the rotational force of the motor is transmitted by the rotation transmission mechanism. The cam gear  33  is integrally formed with the output shaft  32  to which the ice making tray  2  is coupled. The output shaft  32  protrudes outward of the casing  31  from a hole provided in an end plate  311  of the casing  31  on the other side X 2  in the first direction X. In order to remove the ice from the ice making tray  2 , the output shaft  32  rotates in the CCW direction being a counterclockwise direction around the axis L 0  to rotate the ice making tray  2  from the water storage position  2 A to the ice removal position  2 B. Further, in order to return the ice making tray  2  from the ice removal position  2 B to the water storage position  2 A, the output shaft  32  rotates in a CW direction being a clockwise direction. 
     An ice detecting lever  6  is arranged at a position adjacent to the ice making tray  2  on the other side Y 2  in the second direction Y. An ice detecting mechanism for operating the ice detecting lever  6  to rotate around an axis L 1  in conjunction with the cam gear  33  according to a rotation angle of the cam gear  33 , a switching mechanism for operating based on a signal input from thermistor, and the like, are configured in the casing  31  of the driving unit  3 . Further, the driving unit  3  is connected to a wire  5  for power supply to the motor. The wire  5  is drawn to the outside of the frame  4  from one side Y 1  in the second direction Y of the driving unit  3 , and extends along the outer surface of the frame  4  to the other side X 2  in the first direction X. 
     (Frame) 
     As illustrated in  FIG. 1  to  FIG. 5 , the frame  4  includes the first side plate unit  41  extending in the first direction X on the one side Y 1  in the second direction Y of the ice making tray  2  and the driving unit  3 , and the second side plate unit  42  extending in the first direction X on the other side Y 2  in the second direction Y of the ice making tray  2  and the driving unit  3 . The first side plate unit  41  and the second side plate unit  42  face each other in the second direction Y. A first upper plate unit  410  is provided at the upper end of the first side plate unit  41 . The first upper plate unit  410  protrudes toward the second side plate unit  42  to the other side Y 2  in the second direction Y. Specifically, the first upper plate unit  410  is bent downward at a position halfway to the other side Y 2  in the second direction Y and then protrudes toward the second side plate unit  42 . Further, from the vicinity of the upper end of the second side plate unit  42 , a second upper plate unit  420  protrudes toward the first side plate unit  41 . 
     A substantially rectangular opening  430  is formed between the first upper plate unit  410  and the second upper plate unit  420 . The water storage concave units  20  of the ice making tray  2  are open toward the opening  430 . The ice detecting lever  6  is arranged between the second side plate unit  42  and the ice making tray  2 . In the second upper plate unit  420 , an opening  421  in which the upper end of the ice detecting lever  6  is arranged is formed. 
     Further, the frame  4  includes a first wall unit  43  that extends in the second direction Y and connects ends of the first side plate unit  41  and the second side plate unit  42  on the one side X 1  in the first direction X, and a second wall unit  44  that extends in the second direction Y and connects ends of the first side plate unit  41  and the second side plate unit  42  on the other side X 2  in the first direction X. A support unit  45  protrudes from the upper end of the first wall unit  43  toward the second wall unit  44 . The driving unit  3  is arranged below the support unit  45  and supported by the support unit  45 . 
     The second wall unit  44  is a porous wall in which a plurality of plate-shaped ribs are coupled to each other. A shaft hole  440  structured to rotatably support the shaft unit  28  of the ice making tray  2  is provided in the center of the second wall unit  44 . Further, on the upper side of the second wall unit  44 , a water channel component  46  is provided. The water channel component  46  protrudes from the second wall unit  44  to the one side X 1  and the other side X 2  in the first direction X. The water channel component  46  includes the water channel  10  on the top surface thereof. Water poured to the water channel  10  from the water supply pipe (not illustrated) is poured from a water flow port  11  (see  FIG. 5 ) provided at the end of the water channel  10  on the one side X 1  in the first direction X to the water receiving unit  30  of the ice making tray  2 . 
     As illustrated in  FIG. 3  and  FIG. 4 , in the second wall unit  44 , there is provided an abutment unit  70  structured to abut against the rotation restriction unit  29  of the ice making tray  2  from the front in the CCW direction when the ice making tray  2  rotates around the axis L 0  from the water storage position  2 A in the CCW direction to reach the ice removal position  2 B. The abutment unit  70  protrudes from the second wall unit  44  to one side X 1  in the first direction X. In the ice removal position  2 B, the abutment unit  70  abuts against the rotation restriction unit  29  and prevents the rotation of the ice making tray  2  that is driven in the CCW direction. As a result, the ice making tray  2  is twisted. 
     (First Side Plate Unit) 
     As illustrated in  FIG. 2 , the first side plate unit  41  includes an inner wall  50  facing the side on which the ice making tray  2  is located (the other side Y 2  in the second direction Y). The inner wall  50  has a first inner wall portion  51  extending in the first direction X along the driving unit  3 , a second inner wall portion  52  extending in the first direction X along the ice making tray  2  on the other side Y 2  in the second direction Y with respect to the first inner wall portion  51 , and a step unit  53  extending in a direction intersecting the first direction X and connecting the first inner wall portion  51  and the second inner wall portion  52 . As illustrated in  FIG. 2  and  FIG. 5 , a cutout  47  obtained by cutting a lower end of the step unit  53  (an end on the other side Z 2  in the third direction Z) upward is formed in the first side plate unit  41 . The cutout  47  penetrates the first side plate unit  41 . The wire  5  connected to the driving unit  3  is drawn out from the cutout  47  to the outside of the frame  4 . 
     As illustrated in  FIG. 3  to  FIG. 5 , the first side plate unit  41  includes an outer wall  60  facing the opposite side (the one side Y 1  in the second direction Y) to the ice making tray  2 . The outer wall  60  includes reinforcing ribs  61  that protrude from the inner wall  50  to the one side Y 1  in the second direction Y (outside of the frame  4 ). The reinforcing ribs  61  include a plurality of longitudinal ribs  62  extending in the third direction Z and a plurality of transverse ribs  63  extending in the first direction X. At the outer peripheral edge of the outer wall  60 , the longitudinal ribs  62  and the transverse ribs  63  are connected to each other in a frame shape. The tip end surfaces of the longitudinal ribs  62  and the plurality of transverse ribs  63  are located on the same plane, and constitute a grid-like attachment flat surface  64 . The attachment flat surface  64  is a surface that abuts against a support (refrigerator) when the ice maker  1  is attached to the support. 
     The transverse ribs  63  include an upper rib  631  extending in the first direction X along the upper end of the first side plate unit  41 , a lower rib  632  extending in the first direction X along the lower end of the first side plate unit  41 , and two middle ribs  633  and  634  located between the upper rib  631  and the lower rib  632 . Further, among the longitudinal ribs  62 , some of the longitudinal ribs  62  located on the one side X 1  in the first direction X with respect to the cutout  47  of the first side plate unit  41  extend from the upper end to the lower end of the first side plate unit  41 , and are connected to the upper rib  631  and the lower rib  632 . Further, among the plurality of longitudinal ribs  62 , some of the longitudinal ribs  62  located on the other side X 2  in the first direction X with respect to the cutout  47  extend from the upper end of the first side plate unit  41  to the position of the lower middle rib  633 , and are connected to the upper rib  631  and the lower middle rib  633 . Between the lower middle rib  633  and the lower rib  632 , a groove-shaped wire arrangement unit  65  extending from the cutout  47  to the other side X 2  in the first direction X is formed. 
     In the first side plate unit  41 , a plurality of attachment units  48  for fixing the frame  4  to the support (not illustrated) when the ice maker  1  is installed in the refrigerator is provided. The attachment units  48  have two types: a first attachment unit  481  protruding upward (the one side Z 1  in the third direction Z) from the upper rib  631  located at the upper end of the outer wall  60 , and a second attachment unit  482  protruding to one side X 1  in the first direction X from the longitudinal rib  62  located at the end of the outer wall  60  on the one side X 1  in the first direction X. On the other side X 2  in the first direction X with respect to the cutout  47 , the first attachment unit  481  is provided in two places separated in the first direction X. Further, the second attachment unit  482  is provided in one place. 
     The first attachment unit  481  has a vertically long shape in which the height in the third direction Z is longer than the width in the first direction X. A through hole  481   a  for passing a fixing screw is formed at the upper end of the first attachment unit  481 . Further, attachment unit reinforcing ribs  483  protruding to the one side Y 1  in the second direction Y are formed in the first attachment unit  481 . The attachment unit reinforcing ribs  483  are grid-like, and are connected to the reinforcing ribs  61  of the outer wall  60 . The second attachment unit  482  is rectangular, in which a through hole  482   a  for passing a fixing screw is formed at the center. 
     The through hole  481   a  of the first attachment unit  481  has a shape which is enlarged downward from the hole for fixing a screw. Therefore, the screw is passed through the through hole  481   a , and then the frame  4  is moved downward so that the screw is positioned at the upper end portion of the through hole  481   a , thereby making it possible to position the frame  4  in the first direction X and the up-down direction. After positioning, the frame  4  is fixed to the refrigerator as the support by fixing a screw in the through hole  482   a  of the second attachment unit  482 . 
     As described above, in the first side plate unit  41 , there is provided the cutout  47  (through unit) penetrating the step unit  53  of the inner wall  50 , and in the outer wall  60 , there is provided the wire arrangement unit  65  extending in the first direction X to communicate with the cutout  47 . The wire arrangement unit  65  is a groove surrounded by the lower middle rib  633 , the inner wall  50 , and the lower rib  632 , and opens to the one side Y 1  in the second direction Y. The wire arrangement unit  65  is formed in a gap between the middle rib  633  and the lower rib  632 , which are the reinforcing rib  61  of the first side plate unit  41 . 
     At the lower edge of the wire arrangement unit  65 , wire support units  49  structured to support the wire  5  from the one side Y 1  in the second direction Y are provided. The wire support unit  49  protrudes upward (the one side Z 1  in the third direction Z) from the tip end of the lower rib  632  extending along the lower end of the outer wall  60 . The wire support unit  49  has a plate shape, and a gap in which the wire  5  is held is formed between the wire support unit  49  and the inner wall  50 . In the present embodiment, the frame  4  is made of resin, and the wire support unit  49  is elastically deformable in the second direction Y. Accordingly, the wire support unit  49  elastically presses the wire  5  against the inner wall  50 . Further, at the tip end portion of the wire support unit  49 , a retaining claw  491  bent toward the other side Y 2  in the second direction Y is provided. 
     The wire support units  49  are arranged at two places separated in the first direction X. In the present embodiment, the positions of the two wire support units  49  in the first direction X are substantially the same as those of the first attachment units  481 . The wire support unit  49  does not protrude toward the one side Y 1  in the second direction Y of the reinforcing rib  61 . Therefore, even if the wire  5  is passed between the inner wall  50  and the wire support unit  49 , the wire  5  does not protrude toward the one side Y 1  in the second direction Y of the reinforcing rib  61 . For this reason, even if the wire  5  is drawn along the outer wall  60  of the first side plate unit  41 , the floating of the frame  4  due to the wire  5  is less likely to occur when the frame  4  is attached to the refrigerator. 
     (Cutout) 
       FIG. 6  is a cross-sectional view of the ice maker  1  of  FIG. 1  taken at a position of the wire arrangement unit  65 . As illustrated in  FIG. 6 , the cutout  47  through which the wire  5  passes is provided by utilizing the step between the first inner wall portion  51  and the second inner wall portion  52  of the inner wall  50 , and is formed to penetrate the step unit  53  (see  FIG. 2 ) connecting the first inner wall portion  51  and the second inner wall portion  52 . When the cutout  47  is provided in the step unit  53 , the opening direction of the cutout  47  becomes the first direction X. Therefore, when the wire  5  is passed through the cutout  47  and drawn out to the other side X 2  in the first direction X, the wire  5  can be shaped so as not to be bent greatly. 
     The cutout  47  is located on the one side Y 1  in the second direction Y of a coupling position P at which the driving unit  3  and the ice making tray  2  are coupled to each other, and the coupling position P and the cutout  47  are located at approximately the same position in the first direction X. Accordingly, the first inner wall portion  51  extends along the driving unit  3 , and the second inner wall portion  52  extends along the ice making tray  2 . The width of the ice making tray  2  in the second direction Y is smaller than the width of the driving unit  3  in the second direction Y, and there is space on both sides in the width direction (second direction Y) of the ice making tray  2 . In the present embodiment, the second inner wall portion  52  is offset to the ice making tray  2  side (the other side Y 2  in the second direction Y) by utilizing the space between the first side plate unit  41  and the ice making tray  2 . 
     Thus, positioning the second inner wall portion  52  closer to the ice making tray  2  (the other side Y 2  in the second direction Y) than the first inner wall portion  51  results in an increased thickness of the first side plate unit  41  in the second direction Y. Specifically, the protrusion dimension of the reinforcing rib  61  on the outer wall  60  side is longer by the offset of the second inner wall portion  52 . Therefore, the strength of the first side plate unit  41  can be increased as much as the increased thickness of the first side plate unit  41 . In addition, since the cutout  47  is provided on the one side Y 1  in the second direction Y with respect to the coupling position P or in the vicinity of the coupling position P, the first side plate unit  41  has an increased thickness over the entire portion extending along the ice making tray  2 . 
     The wire  5  is held by the cutout  47  on the one side Y 1  in the second direction Y with respect to the coupling position P. The wire  5  has a first drawing portion  5   a  arranged on the one side X 1  in the first direction X with respect to the cutout  47  and a second drawing portion a arranged on the other side X 2  in the first direction X with respect to the cutout  47 . The first drawing portion  5   a  is arranged between the driving unit  3  and the first inner wall portion  51 . The second drawing portion a is arranged in the wire arrangement unit  65 . In the wire arrangement unit  65 , there are provided a plurality of small-sized reinforcing ribs  651  protruding from the second inner wall portion  52  to the one side Y 1  in the second direction Y. The small-sized reinforcing rib  651  has a smaller protrusion dimension from the first inner wall portion  51  than the reinforcing rib  61 . Accordingly, a gap for holding the second drawing portion  5   b  of the wire  5  is formed between the wire support unit  49  and the tip end of the small-sized reinforcing rib  651 . 
     (Operation) 
     In the ice maker  1  of the present embodiment, the frame  4  is fixed to the refrigerator serving as the support by three attachment units  48 , and the ice maker  1  is then installed in the refrigerator. In this state, ice making is performed in the ice making tray  2 . In the ice making process, water is supplied to the ice making tray  2  horizontally arranged so that the water storage concave units  20  face upward through the water supply pipe (not illustrated), and the water storage concave units  20  are filled with water accordingly. Thereafter, the water filled in the ice making tray  2  is cooled by a cooling unit (not illustrated) installed above the ice making tray  2 . Whether or not the ice making is completed is determined by thermistor attached to the ice making tray  2  depending on whether the temperature of the ice making tray  2  is equal to or lower than a predetermined temperature. 
     When the ice making is completed, the ice detecting lever  6  detects the amount of ice in an ice storage container (not illustrated) installed below the ice making tray  2 . Specifically, the ice detecting lever  6  is driven by the driving unit  3  to descend. At this time, when the ice detecting lever  6  descends to a predetermined position, it is determined that the inside of the ice storage container is not full of ice. On the other hand, when the ice detecting lever  6  comes in contact with the ice in the ice storage container before descending to the predetermined position, it is determined that the ice storage container is full of ice. When the ice storage container is full of ice, after waiting for a predetermined time, the ice detecting lever  6  detects again the amount of ice in the ice storage container. 
     When the ice storage container is full of ice, the operation of removing the ices from the ice making tray  2  is performed. Specifically, the rotation of the output shaft  32  of the driving unit  3  causes the ice making tray  2  to rotate around the axis L 0 . When the rotation of the ice making tray  2  reaches a predetermined rotation angle of 90° or more (for example, 120°) from the home position at which the ice making tray  2  is located horizontally, the rotation restriction unit  29  of the ice making tray  2  abuts against the abutment unit  70  of the frame  4 . In this state, even if the ice making tray  2  is further rotated, the rotation is prevented, and the ice making tray  2  is twisted and deformed. As a result, the ice in the ice making tray  2  is peeled off from the ice making tray  2  and drops into the ice storage container installed below the ice making tray  2 . 
     After that, the driving unit  3  reversely rotates the ice making tray  2  so that the water storage concave units  20  face upward, and the above operation is repeated. 
     (Main Effect of Present Embodiment) 
     As described above, the ice maker  1  according to the present embodiment includes the ice making tray  2  including the water storage concave units  20  arranged to face upward, the driving unit  3  structured to cause the ice making tray  2  to perform the flip operation and the twist operation around the axis L 0  extending in the first direction X, and the frame  4  structured to support the ice making tray  2  and the driving unit  3 . The frame  4  includes the first side plate unit  41  extending in the first direction X on the one side Y 1  in the second direction Y intersecting the up-down direction and the first direction X (the direction of the axis L 0  of the ice making tray  2 ) with respect to the ice making tray  2 . In the inner wall  50  of the first side plate unit  41 , there are provided the first inner wall portion  51  extending in the first direction X along the driving unit  3 , and the second inner wall portion  52  extending in the first direction X along the ice making tray  2  on the other side Y 2  in the second direction Y with respect to the first inner wall portion  51 , and in the step unit  53  connecting the first inner wall portion  51  and the second inner wall portion  52 , there is provided the cutout  47  serving as the through unit for passing the wire  5  connected to the driving unit  3 . 
     In the present embodiment, since the inner wall  50  of the first side plate unit  41  is shaped to have a step, the thickness of the first side plate unit  41  in the second direction Y is increased by the amount of the step. Therefore, the strength of the first side plate unit  41  can be secured, and deformation or damage of the frame  4  can be suppressed. Further, since the step unit  53  which is a step surface intersects the first direction X, the cutout  47  penetrating the first side plate unit  41  in the first direction X can be provided in the step unit  53 . Therefore, when the wire  5  is drawn through the cutout  47  and along the outer side surface of the frame  4 , the wire  5  can be drawn so as not to bend greatly. Further, the cutout  47  is provided as the through unit, thereby making easy work of passing the wire  5  through the through unit. It is noted that not the cutout  47  but a hole can also be provided as the through unit. 
     In the present embodiment, the step unit  53  of the inner wall  50  is located on the one side Y 1  in the second direction Y with respect to the coupling position P at which the driving unit  3  and the ice making tray  2  are coupled to each other. Therefore, the first side plate unit  41  has an increased thickness in the second direction Y over the entire portion on the ice making tray  2  side with respect to the coupling position P, thereby making it possible to secure the strength of the first side plate unit  41 . Therefore, deformation or damage of the frame  4  can be suppressed. Further, since the thickness of the first side plate unit  41  can be increased by utilizing an empty space around the ice making tray  2 , securing the strength of the first side plate unit  41  makes it possible to prevent the size of the ice maker  1  in the second direction Y from increasing. 
     In the present embodiment, the ice making tray  2  is made of a flexible material, and the frame  4  includes the abutment unit  70  structured to abut against the ice making tray  2  from the side on which the first side plate unit  41  is located when the ice making tray  2  rotates in the CCW direction from the water storage position  2 A where the water storage concave units  20  face upward to reach the ice removal position  2 B where the water storage concave units  20  face downward, and to prevent the rotation of the ice making tray  2 . With such a configuration, when the ice making tray  2  is moved to the ice removal position  2 B to remove the ice, a force applied from the ice making tray  2  to the frame  4  is a force to press the first side plate unit  41 . Therefore, by increasing the thickness of the first side plate unit  41  in the second direction Y by the amount of the step to secure the strength of the first side plate unit  41 , deformation or damage of the frame  4  can be suppressed. Further, the ice removal position  2 B is such a position that the opening direction of the water storage concave units  20  of the ice making tray  2  is on the other side Y 2  in the second direction Y and that the opening direction of the water storage concave units  20  faces the opposite side to the side on which the first side plate unit  41  is located. Therefore, the ice can be dropped to the opposite side to the side on which the wire  5  is drawn (that is, the side on which the first side plate unit  41  is located). 
     In the present embodiment, the ice maker  1  is installed so that the first side plate unit  41  abuts against the support (refrigerator). Therefore, the force applied from the ice making tray  2  to the frame  4  is a force to press the first side plate unit  41  against the support, and can support the first side plate unit  41  with the support accordingly. Thus, deformation or damage of the frame  4  can be suppressed. 
     The ice maker  1  according to the present embodiment includes the second side plate unit  42  extending in the first direction X on the other side Y 2  in the second direction Y with respect to the ice making tray  2 , and the ice detecting lever  6  (ice detecting member) supported to be movable in the up-down direction is arranged between the second side plate unit  42  and the ice making tray  2 . Therefore, the wire  5  can be drawn to the opposite side to the side on which the ice is dropped from the ice making tray  2  (that is, the side on which the ice detecting lever  6  is arranged). 
     In the present embodiment, the first side plate unit  41  includes the outer wall  60  facing the one side Y 1  in the second direction Y, and the outer wall  60  includes the plurality of reinforcing ribs  61  protruding to the one side Y 1  in the second direction Y. Therefore, the strength of the first side plate unit  41  can be secured by the reinforcing ribs  61 . Further, the tip end surfaces of the plurality of reinforcing ribs  61  are located on the same plane, and constitute the grid-like attachment flat surface  64 . Therefore, the ice maker  1  can be installed so that the attachment flat surface  64  abuts against the support and the first side plate unit  41  is supported by the support. Thus, the floating of the frame  4  from the support can be suppressed. In addition, deformation or damage of the frame  4  can be suppressed. 
     In the present embodiment, the cutout  47  penetrating the step unit  53  is in communication with the wire arrangement unit  65  provided in the gap of the reinforcing ribs  61 . Therefore, a space for drawing the wire  5  is secured, thereby making it possible to prevent the wire  5  from jumping outside the reinforcing ribs  61 . Therefore, damage to the wire  5  or floating of the frame  4  from the support due to the wire  5  being sandwiched between the first side plate unit  41  and the support can be suppressed. 
     In the present embodiment, in the outer wall  60  of the first side plate unit  41 , there is provided the wire support unit  49  supporting the wire  5  on the other side X 2  in the first direction X with respect to the cutout  47  penetrating the first side plate unit  41 . Therefore, it is easy to support the wire  5  which is free on the outside of the frame  4 . Further, the wire support unit  49  is formed at the edge of the wire arrangement unit  65 , thereby making it possible to hold the wire  5  so as to be prevented from jumping outside the wire arrangement unit  65 . Therefore, damage to the wire  5  or floating of the frame  4  from the support due to the wire  5  jumped out of the wire arrangement unit  65  being sandwiched between the first side plate unit  41  and the support can be suppressed. 
     In the present embodiment, since the cutout  47  is provided at the lower end of the first side plate unit  41 , the wire  5  can be drawn along the lower end of the first side plate unit  41 . Therefore, the wire  5  is unlikely to hinder the installation of the water supply pipe for supplying water to the ice making tray  2  and the like.