JPH0260952B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of drilling bolt holes for attaching a door holder frame to the peripheral edge of a refrigerator opening, for example, in a large-sized prefabricated refrigerator.

Conventional technology and its problems In the conventional method, a door frame is applied to the periphery of the opening provided in the wall of the refrigerator, and the door frame is passed through the door frame and the wall in a straight line from the outer surface of the door frame. I was trying to drill bolt holes in the. If a bolt is passed through the hole thus drilled and the door frame is attached to the peripheral edge of the store entrance, the head of the bolt will be exposed on the outer surface of the door frame, which is not desirable in terms of design. In addition, outside air entered the inside of the door frame through the bolt holes, and moisture contained in the outside air sometimes condensed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of drilling holes for bolts for attaching a door holder frame in a prefabricated refrigerator, which solves the above-mentioned problems.

Means for Solving the Problems The method of drilling holes for bolts for attaching a door frame in a prefabricated refrigerator according to the present invention is such that when attaching the door frame with bolts to the periphery of an opening provided in a wall made of heat insulating panels, In this method, a screw hole into which the bolt is screwed is provided in the door frame so that it is not exposed on the outside of the door frame, a male screw to be screwed into the screw hole is provided on the outer circumferential surface of the punch, and the punch is inserted into the screw hole. Screw in the male screw so that the tip of the punch protrudes inward from the door holder frame, press the door holder frame against the periphery of the storage opening, and mark the position where the bolt hole will be drilled with the tip of the punch. It is characterized by having bolt holes drilled in some places.

In this specification, the term "refrigerator" means
It includes a freezer in addition to a regular refrigerator.

Embodiments Embodiments of the present invention will now be described with reference to the drawings.

Figure 3 shows the refrigerator viewed from the front.
In the following explanation, front and back refer to the front side in the direction perpendicular to the page of Figure 3,
The opposite side is called the back, and the left and right sides are called the front.

The refrigerator has walls 11 made of heat insulating panels.
A storage opening 12 is provided in the wall 11. Storage entrance 12
A heat insulating frame 13 made of synthetic resin is attached to the peripheral edge of the heat insulating frame 13, and a door receiving frame 14 made of extruded aluminum is attached so as to surround the heat insulating frame 13, and a door 16 is attached to this via a hinge 15.

The door receiving frame 14 includes upper and lower frame members 21, 22, left and right side frame members 23, 24, and these frame members 2.
It consists of four corner metal fittings 25 connecting parts 1 to 24. Although the frame members 21 to 24 have different lengths and directions, they all have the same cross-sectional shape, and the right side frame shown in FIG. The member 24 is made up of a main body 31 which is open inward and has a U-shaped cross section, and a decorative wall 33 extending diagonally inward to the right from the right edge of an outer wall 32 of the main body 31. Opposing edges 36 are provided on opposing surfaces of the left and right side walls 34 and 35 of the main body 31.
is provided. The corner metal fitting 25 straddles the opposing ends of the two adjacent frame members 21 to 24 and is engaged with the opposing projecting edge 36 from the outside in a state where it is sandwiched between the respective left and right side walls 34 and 35 with almost no gap. Each frame member 21 to
24 connections have been completed. A fixing nut 38 is fixed to the inner surface of the corner fitting 25. Then, a bolt hole 41 is drilled in the wall 11 so as to match the screw hole 39 of the fixing nut 38.
A double-cut bolt 42 is passed through the threaded portion 4 at one end.
3 is screwed into the screw hole 39 of the fixing nut 38,
A tightening nut 46 is screwed into the other end threaded portion 44 via a washer 45, thereby tightening the door holder frame 14.
Installation has been completed. Also, tighten the tightening nut 4.
6 is covered with a cap 47.

Next, the door holder frame 1 including how to open the bolt holes 41
We will explain how to install item 4. For this purpose, a punch 51 shown in FIG. 2 is used. A male screw 52 is provided on the outer peripheral surface of the punch 51 and is screwed into the screw hole 39 of the fixing nut 38.

First, the door receiving frame 14 is assembled into a frame shape, and the male screw 52 of the punch 51 is screwed into the screw hole 39 of the fixing nut 38. At this time, the tip of the punch 51 is made to protrude inward from the door receiving frame 14. and,
A mark is made on the outer surface of the wall 11 with the tip of the punch 51 by pressing the door support frame 14 to a predetermined mounting position on the peripheral edge of the storage opening 12. In this way, the door holder frame 14
Once removed from the wall 11, drill a bolt hole 41 at the marked location. Then, remove the punch 51 from the screw hole 39 and replace it with the punch 51 from the screw hole 39.
9, screw in the threaded portion 43 at one end of the double-sided bolt 42. Then, while passing the double-cut bolt 42 through the bolt hole 41, the door support frame 14 is placed on the peripheral edge of the warehouse entrance 12, and the other end threaded portion 44 of the double-cut bolt 42 is inserted into the bolt hole 4.
1, the tightening nut 46 is screwed there.

When using a well-known headed bolt instead of the double-cut bolt 42, place the door support frame 14 against the periphery of the storage opening 12, then insert the bolt into the bolt hole 41 from the inside and tighten the threaded end of the bolt. Just screw it into the hole 41.

Further, in the above embodiment, the heat insulating frame and the door receiving frame were made separately, but it goes without saying that even if both frames are made integrally, the bolt holes can be drilled using the same method.

Effects of the Invention According to the present invention, a punch is screwed into a screw hole into which a bolt is screwed, the door support frame is pressed against the peripheral edge of the storage opening, and the tip of the punch is used to mark the position where the bolt hole is to be drilled. Since the bolt holes are drilled in certain locations, the bolt hole positions are accurate.

In addition, since the screw holes into which the bolts are screwed are not exposed on the outside of the door frame, if the bolts are inserted into the bolt holes drilled as described above and the door frame is attached to the periphery of the warehouse entrance, the bolts will not be exposed on the outside of the door frame. It is preferable in terms of design to prevent exposure to
Outside air flows into the door frame through the bolt holes and no condensation occurs.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, and FIG.
The - line in the figure shows an enlarged sectional view, FIG. 2 is a sectional view corresponding to FIG. 1 showing how to make bolt holes, and FIG. 3 is a front view of the refrigerator. 11... Wall, 12... Warehouse entrance, 14... Door frame,
39...Screw hole, 41...Bolt hole, 42...Bolt, 51...Punch, 52...Male thread.

Claims (1)

[Claims] 1. A method of drilling bolt holes 41 in the periphery of a door holder 12 provided in a wall 11 made of heat insulating panels when attaching the door holder frame 14 with bolts 42 to the periphery of the storage opening 12 provided in the wall 11 made of heat insulating panels. A screw hole 39 to be screwed is provided in the door holder frame 14 so as not to be exposed on the outer surface thereof, a male screw 52 to be screwed into the screw hole 39 is provided on the outer peripheral surface of the punch 51, and the male screw 52 of the punch 51 is inserted into the screw hole 39. Screw in so that the tip protrudes inward from the door holder frame 14, and attach the door holder frame 14 to the storage opening 12.
For attaching a door holder frame to a prefabricated refrigerator, the method is characterized in that the position where the bolt hole 41 is to be drilled is marked with the tip of the punch 51 by pressing against the peripheral edge of the punch 51, and the bolt hole 41 is drilled at the marked place. How to drill bolt holes.