JP3783171B2 - Manufacturing method of stamp stand for date stamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The date stamp print body is provided with a variable print body made of an endless rubber band for displaying the date, time, etc., and a flat plate-like fixed print body for always displaying a certain content such as the name of a recipient. . The present invention relates to a method for manufacturing a stamp stand for attaching the latter fixed printing body.
[0002]
[Prior art]
FIG. 6 shows a cross-sectional structure of a conventional stamp base, which has a horizontally long rectangular window 31 for exposing a variable printed body at the center of a disk-shaped base body 30, and is long on the surface side of the window 31. A pair of pins 32 stands on the left and right sides of the side. After the base body 30 is joined to the lower surface of the movable frame (not shown), the pin 32 is integrated with the movable frame by caulking the previous pin 32. The fixed printing body is fixed on the back side of the stamp table. Such a mounting structure for the stamp stand can be found in, for example, Japanese Utility Model Publication No. 1-221817 (FIG. 7).
[0003]
The above-mentioned stamp base has been formed integrally with the base body 30 by using a thick plate of aluminum cut to a predetermined size as a raw material and subjecting it to die forging. In detail, after stamping and forming the pin 32 while thinly crushing the thick primary blank, the outer surface of the base body 30 and the opening and surface processing of the window 31 are performed to form the stamp base.
[0004]
[Problems to be solved by the invention]
In the above manufacturing method based on the die forging process, after forming the pins 32 using a primary blank thicker than the base body 30 as a raw material, it is necessary to cut off an excess peripheral part, so that material loss and processing loss are large. Furthermore, after the forging process, the outer shape processing of the main body 30 and the opening and surface processing of the window 31 must be performed for each blank by a press machine, which requires a lot of labor for the entire processing, and the previous material loss Including the cost of, the cost of manufacturing the stamp stand was high. Since the thickness of the base body 30 is defined at the time of die forging, there is a disadvantage that the thickness dimension of the base body 30 is likely to vary and processing noise at the time of die forging is large.
[0005]
An object of the present invention is to provide a method for manufacturing a stamp stand that can efficiently process a stamp stand provided with caulking pins and significantly reduce the manufacturing unit cost compared to the case where the stamp stand is processed by die forging. is there.
Another object of the present invention is to provide a manufacturing method of a stamp stand that can efficiently process a series of processing by a transfer press using a strip-shaped coil material as a raw material.
The object of the present invention is to form a stamp stand having caulking pins at a lower cost, and there is no variation in the thickness of the stand main body. Therefore, the height of the stamp face of the fixed printed body affixed to the stamp stand is always appropriate. It is to provide a stamp stand that can be maintained at a value.
[0006]
[Means for Solving the Problems]
As shown in FIG. 1, the manufacturing method of the stamp stand according to the present invention is such that the blank portion 3 that is slightly larger than the base body 20 is fixed on the plate surface of the material 1 while intermittently feeding the material 1 made of a metal strip at a constant pitch. 1st process A formed for every pitch, 2nd process B which forms the window 5 and the pin hole 6 in the blank part 3, and the edge part of the metal wire 12 is inserted in the pin hole 6 from the surface side of the blank part 3. After the end portion of the wire 12 is caulked and fixed to the back side of the blank portion 3, the metal wire 12 is cut into a predetermined dimension to form the pin 21, and the blank portion 3 is punched into a predetermined shape. It consists of a fourth step D for forming the base body 20.
[0007]
Specifically, the first step A includes a process of punching the partition hole 2 between adjacent parts of the blank part 3 and a process of punching the window lower hole 4 in the blank part 3. In the second step B, as shown in FIG. 2, a primary window processing b 1 that forms a concave surface 9 at the opening edge on the front surface side of the window pilot hole 4 and at the same time forms a micro uneven surface 10 on the back surface side of the blank portion 3. The surplus portion 4a inside the inclined surface 9 is punched and removed, and at the same time, the secondary window processing b2 for forming the pin hole 6 and the tapered caulking seat 7 are formed in the opening edge on the back surface side of the pin hole 6. The seat processing b3 to be performed. In the 4th process D, as shown in Drawing 4, blank part 3 is pierce | punched from the back side to the surface side, and base body 20 is formed.
[0008]
Thus, as shown in FIG. 5, the stamp base of the present invention includes a base body 20 having a window 5 open at the center of the plate surface, and a plurality of caulking pins 21 protruding from the surface side of the base body 20 with the window 5 interposed therebetween. And. A pin hole 6 having a caulking seat 7 at the hole end on the back surface side is formed in the base body 20. The end of the metal wire 12 inserted into the pin hole 6 is caulked and fixed to the caulking seat 7. The metal wire 12 is cut into a predetermined dimension on the surface side of the base body 20 to form the caulking pin 21.
[0009]
[Action]
After the window 5 and the pin hole 6 are formed in the blank part 3, the end of the metal wire 12 is caulked and fixed to the pin hole 6, and the metal wire 12 is cut into a predetermined dimension to form the pin 21, so that it is used for caulking The stamp stand having the pins 21 can be efficiently formed in a shorter time. While intermittently feeding the strip-shaped material 1 at a constant pitch, the blank portion 3, the window 5, and the pin hole 6 are formed, and the metal wire 12 is implanted in the blank portion 3, and then the blank portion 3 is punched out. Since the stamp base 20 is formed, a series of processes can be automatically performed continuously, and the troublesome work for setting or removing the blank material from the press mold can be omitted each time each processing is performed. . Since a series of processing is performed using the raw material 1 adjusted to the finished thickness, wasteful processing and material loss can be reduced, and there is no room for variation in the thickness dimension of the base body 20.
[0010]
When a processing form is adopted in which a caulking seat 7 is formed in the back side of the pin hole 6 and the end portion of the metal wire 12 is caulked and fixed to the caulking seat 7, the pin end portion that has been crushed by the caulking process becomes the base body 20. It is possible to prevent the back surface of the base body 20 from being projected and to flatten the back surface of the base body 20. That is, the flat fixed printing body can be attached to the base body 20 without any trouble. When the crimped pin end protrudes to the back side of the base body 20, it is necessary to take countermeasures such as providing a relief recess for receiving the pin end on the attachment surface side of the fixed printing body. is there. In the fourth step D, the base body 20 is punched from the back surface side to the front surface side of the blank portion 3 so that it is not necessary to form the punching die by avoiding the pins 21, and the die structure can be simplified correspondingly and caulked. This is because it is possible to prevent the pin 21 from being separated from the base body 20 due to an impact or the like during punching by holding the processed pin end with a punching die.
[0011]
【Example】
1 to 5 show an embodiment of a manufacturing method of a stamp stand according to the present invention. The stamp stand uses the aluminum strip wound in a coil shape as the material 1, and intermittently feeds this at a constant pitch, while the feeding operation of the material 1 is stopped, the following press work is sequentially performed. To form. The press working can be roughly divided into a first process A to a fourth process D. The thickness dimension of the material 1 is matched with the finished dimension of the base body 20.
[0012]
(First step)
In FIG. 1 (A), in the first step A, X-shaped segment holes 2 are provided on the plate surface of the material 1 in a penetrating manner at regular intervals, and a blank portion 3 that is slightly larger than a base body 20 described later is formed. At the same time, a rectangular window lower hole 4 is punched and formed in the center of the blank portion 3.
[0013]
(Second step)
In FIG. 1B, in the second step B, the window lower hole 4 is shaped to form the window 5, and at the same time, the pin holes 6 are punched in front and rear of the long side portion of the window 5. In the second step B, as shown in FIG. 2, a primary window machining b1, a secondary window machining b2, and a seat machining b3 for forming the caulking seat 7 are performed.
[0014]
In the primary window processing b1, as shown in FIG. 2 (b1), the opening edge on the surface side of the window lower hole 4 is pressed with a mold that is slightly larger than the window lower hole 4, so that the surface side opening edge of the window lower hole 4 A rectangular inclined surface 9 that inclines downward toward the back surface is formed in a recess. At this time, embossing is simultaneously performed on the back surface side of the blank portion 3 to form the minute uneven surface 10. The minute uneven surface 10 reinforces the adhesive force when the fixed printing body is bonded and fixed to the base body 20.
[0015]
As shown in FIG. 2 (b 2), in the secondary window processing b 2, the surplus portion 4 a that protrudes inside the inclined surface 9 is punched and removed to complete the window 5, and at the same time before and after the long side portion of the window 5. The pin hole 6 is punched and formed. Furthermore, a feed hole 11 is provided in a pair of left and right triangular claws facing the section hole 2. By feeding this feed hole 11 with a feed sprocket (not shown), the material 1 is accurately fed at regular pitches and positioned at each processing position. After this, in the seat processing b3 shown in FIG. 2 (b3), the opening edge on the back surface side of the pin hole 6 is punched to form a concave caulking seat 7 having an upwardly tapered shape.
[0016]
(Third step)
In FIG. 1C, in the third step C, the aluminum wire 12 (metal wire) 12 is planted and fixed in the pin hole 6 formed in the previous step, and then the aluminum wire 12 is cut to a predetermined size and the pin 21 is cut. Form. The details are shown in FIGS. Two sets of aluminum wires 12 wound in a coil shape are prepared corresponding to each pin hole 6, and as shown in FIG. With a mounting device, it inserts into each pin hole 6 from the surface side of the blank part 3. FIG. Next, the end portion of the wire rod is caulked on the back surface side of the blank portion 3, and the end portion of the wire rod is crushed and deformed in the caulking seat 7. The caulking portion is denoted by reference numeral 13. Thereafter, as shown in FIG. 3B, the aluminum wire 12 is cut into a predetermined dimension on the upper surface side of the blank portion 3 to form the pins 21.
[0017]
When the aluminum wire 12 is caulked and fixed to the pin hole 6, the end of the wire is crushed and deformed, and at the same time, the aluminum wire 12 is plastically deformed so that the lower part of the wire swells and adheres to the inner surface of the pin hole 6. Therefore, even after the aluminum wire 12 is cut, the pin 21 does not fall out to the back side of the blank portion 3 due to external impact, and the planted state can be maintained. Since the caulking portion 13 is plastically deformed in the caulking seat 7, it is possible to prevent the caulking portion 13 from projecting to the back side of the blank portion 3 after the pin 21 is implanted. This means that the fixed printing body can be stuck and fixed to the completed stamp stand without any trouble.
[0018]
(4th process)
In FIG. 1D, in the fourth step D, the blank portion 3 is punched out into a circular shape to form the base body 20 and form the stamp base. Specifically, as shown in FIG. 4A, after blanking the blank portion 3 from the back side to the front side in a circular shape, the base body 20 is completely moved as shown in FIG. Punching is completed to complete the processing of the stamp stand provided with the pair of pins 21.
[0019]
As shown in FIG. 5, the stamp stand obtained through each of the above steps is obtained by joining the stand main body 20 to the lower surface of the movable frame 22 and then caulking the upper ends of the pins 21 protruding from the inner surface of the movable frame 22. Is integrated with the movable frame 22. Thereafter, the fixed printing body is bonded and fixed to the back side of the base body 20, and the processing of the stamp base is completed.
[0020]
A part of the processing procedure in the above embodiment can be changed. For example, the pin hole 6 and the feed hole 11 can be formed in parallel with the shaping of the window 5 or before the shaping of the window 5 is performed. In particular, when the inclined surface 9 is omitted, the formation order of the window 5, the pin hole 6, and the feed hole 11 can be freely changed. In the above-described embodiment, it is assumed that a series of processing is performed using a transfer press or a transfer press line, that is, a case where a long material 1 is continuously supplied and a series of processing is automatically performed. However, this is not always necessary. For example, the stamp table can be formed by processing the first step A to the fourth step D with an individual press. In this case, a strip-shaped standard material 1 can be used. In the fourth step D, the base body 20 can be punched from the front surface side to the back surface side of the blank portion 3. The base body 20 can be formed in an oval shape or a square shape. The base body 20 and the pins 21 may be formed of a metal material other than aluminum, such as a copper alloy or a steel alloy.
[0021]
In addition to forming the stamp stand with a pair of pins 21, the manufacturing method in which only the planting of the pins 21 with respect to the base body 20 is performed by a dedicated caulking device can be adopted. The base body 20 is formed by omitting the third step C in the above manufacturing method. If necessary, two or more pins 21 can be provided.
[0022]
【The invention's effect】
According to the manufacturing method of this invention, after punching and forming the window 5 and the pin hole 6 in the blank part 3, the metal wire 12 planted and fixed in the pin hole 6 is cut into a predetermined length to form the pin 21. Therefore, in comparison with the conventional manufacturing method in which the pins 21 are formed integrally with the base body 20 by die forging, the stamp base can be formed efficiently, and wasteful processing and material loss can be reduced. The manufacturing unit price can be reduced to at least about 20% of the conventional product. Since the obtained base body 20 of the stamp stand has no variation in thickness, it is advantageous in that the stamp face height of the fixed printing body fixed to the stamp stand can always be maintained at an appropriate value.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing a manufacturing process of a stamp stand.
FIG. 2 is a cross-sectional view showing details of processing in a second step.
FIG. 3 is a cross-sectional view showing details of processing in a third step.
FIG. 4 is a sectional view showing details of processing in a fourth step.
FIG. 5 is a cross-sectional view showing a connection structure between a stamp stand and a movable frame.
FIG. 6 is a perspective view in which a part of a conventional stamp stand is broken.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Material 3 Blank part 5 Window 6 Pin hole 7 Caulking seat 9 Inclined surface 10 Minute uneven surface 12 Metal wire 20 Base body 21 Pin A 1st process B 2nd process C 3rd process D 4th process

Claims (3)

A manufacturing method of a stamp base for date stamp comprising a base body (20) having a window (5) open on a plate surface and a pin (21) for caulking,
First, a blank part (3) that is slightly larger than the base body (20) is formed on the plate surface of the material (1) at a constant pitch while intermittently feeding the material (1) made of a metal strip at a constant pitch. Step (A);
A second step (B) for forming a window (5) and a pin hole (6) in the blank part (3);
After inserting the end portion of the metal wire (12) into the pin hole (6) from the front surface side of the blank portion (3) and caulking and fixing the end portion of the wire material (12) to the back surface side of the blank portion (3), A third step (C) of forming the pin (21) by cutting the metal wire (12) into a predetermined dimension;
Including a fourth step (D) of punching the blank portion (3) into a predetermined shape to form the base body (20) ,
1st process (A) consists of the process which punches a division hole (2) between the adjacent parts of a blank part (3), and the process which punches a window lower hole (4) in a blank part (3),
The second step (B) is a primary window processing (b1) in which an inclined surface (9) is formed in the opening edge on the surface side of the window pilot hole (4),
The secondary window processing (b2) for punching and removing the surplus portion (4a) inside the inclined surface (9) and simultaneously forming the pin hole (6),
A method for manufacturing a stamp base for date stamp , comprising: a seat processing (b3) in which a tapered caulking seat (7) is formed in the opening edge on the back surface side of the pin hole (6) . In a second step (B), the inclined surface (9) simultaneously with the indentations forming the blank portion for the date stamp of 請 Motomeko 1 wherein that form a fine uneven surface (10) on the back side of (3) Manufacturing method of the stamp stand. The manufacturing method of the stamp stand for date stamps of Claim 1 or 2 which forms a base main body (20) by punching a blank part (3) from the back side to the surface side in a 4th process (D) .

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