JPH0798233B2 - Punching device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a punching device for forming at least one hole in a connecting protrusion of a metal container lid body.

<Prior Art> As disclosed in JP-A-57-178730, JP-B-52-4347 and the like, a container having a metal container lid main body and a synthetic resin gripping body as a simple openable container lid. Lids have been proposed in the past. The body, which is formed from a suitable metal sheet, such as an aluminum-based alloy sheet, is usually a circular top wall, a cylindrical skirt wall extending from the periphery of the top wall, and a connecting projection protruding from a portion of the free end of the skirt wall. And a protruding piece. The synthetic resin gripping body, which is conveniently ring-shaped as a whole, is formed by injection or compression molding in such a manner that a part of the gripping body at least partially surrounds the connecting projecting piece of the main body. It is connected to the connecting protruding piece of the main body. In order to connect the grip body to the connecting projection of the main body sufficiently firmly,
The publication also discloses that at least one hole is formed in the connecting projecting piece of the main body so that the synthetic resin also flows into the hole when the grip body is formed.

Although there is no description about the punching work for forming the above-mentioned hole in the connecting projection piece of the main body, such a drilling work cooperates with each other in the same manner as in the case of general metal plate processing. It may be intended to use a perforating device comprising a cutting punch and a cutting die for subjecting the latter to a cutting process.

<Problems of the prior art> Therefore, according to the experience of the present inventors, so-called cutting scraps are generated in the punching device by (a) cutting by cooperation of a cutting punch and a cutting die. It is not easy to dispose of such cutting chips, and (b) the cutting punch and the cutting die, which perform the cutting process in cooperation with each other, need to have a sharp cutting edge with high dimensional accuracy. There are problems such as high cost and short life.

<Technical problem of the invention> The present invention has been made in view of the above facts, and its main technical problem is to sufficiently strongly connect a synthetic resin gripping body to a connecting projecting piece of a metal body. SUMMARY OF THE INVENTION It is an object of the present invention to provide a new and improved drilling device capable of forming a hole capable of fully satisfying the above requirement in a connecting protrusion of a main body without using a cutting process and thus without the above problems. .

<Means for Solving the Invention> In the punching device of the present invention, a container lid main body pedestal having an anvil surface and a punching tool assembly are provided in place of the cutting punch and the cutting die that cooperate to perform cutting work. To be done.
The container lid body cradle receives the container lid by positioning the connecting projecting piece of the metal container lid body on the anvil surface. A perforation tool assembly that is relatively moved in a direction toward and away from the anvil surface of the container lid body cradle,
It has at least one perforator projecting towards the anvil surface and having a tapered pyramidal tip. The anvil surface is formed with at least one recess into which the tip of the punch is inserted. The cross-sectional area of the recess is larger than the cross-sectional area of the tip of the perforation tool that is inserted therein, and the side wall of the recess and the tip of the perforation tool when the tip of the perforation tool enters the recess. A gap remains between and.

In a preferred embodiment of the punching position of the present invention, a pressing member made of an elastic material surrounding the tip end portion of the punching tool is also arranged in the punching tool assembly. For example, the pressing member formed of synthetic rubber acts on the connecting projection of the container lid body at the same time as or before the tip of the punching tool acts on the connecting projection to press it against the anvil surface. .

<Operation of the Invention> In the punching device of the present invention, the tapered pyramidal tip of the punching tool penetrates the connecting projection of the container lid body and enters the recess formed on the anvil surface. As a result, a boring operation for forming a hole in the connecting projection piece is performed. Since the cross-sectional area of the recess is larger than the cross-sectional area of the tip of the punch, the punching operation is not so-called cutting processing, but so-called breaking processing that does not generate processing chips. Therefore, in the punching device of the present invention, there is no problem associated with machining chips such as cutting chips. Both the tip of the punch and the recess do not require high dimensional accuracy, and the tip of the punch is a tapered cone shape that can penetrate the connecting projection of the container lid body. Well, you don't have to have sharp cutting edges. Therefore, the punching device of the present invention has a relatively low manufacturing cost and a long service life.

On the other hand, when the boring operation is performed by the breaking process that does not generate the machining waste, a relatively large breaking burr is generated on one surface side (that is, the side facing the anvil surface) of the connecting projection piece. However, when the synthetic resin gripping piece is formed later by injection or compression molding, a part of the gripping piece surrounds the breaking burr. Therefore, there is no inconvenience caused by the breaking burr, and conversely, the existence of the breaking burr reinforces the connecting strength between the connecting projecting piece of the container lid body and the gripping piece.

<Preferred Embodiments of the Invention> Hereinafter, preferred embodiments of the punching device configured according to the present invention will be described in detail with reference to the accompanying drawings.

Overview of the Whole Apparatus Referring to FIG. 1 which schematically shows the whole punching apparatus, the punching apparatus shown is a container in the form of a rotary turret together with a rotary punching apparatus body generally designated by reference numeral 2. The lid main body supply means 4 and the discharge chute 6 are provided. As will be described in more detail later, the punching device main body 2 includes a rotary support 8 rotatably mounted about a central axis extending perpendicularly to the plane of the drawing in FIG. A plurality of (12 in the illustrated case) container lid body pedestals 10 are arranged on the rotary support 8 and the container lid body pedestals 10 are provided.
A plurality (12 in the illustrated case) of punching tool assemblies (not shown in FIG. 1) are arranged above each of the 10 correspondingly. The rotary support 8 is shown by an arrow 12 in FIG.
Are continuously driven to rotate in the direction shown by, and thus each of the container lid body receiving base 10 and the punch assembly is provided in the container lid body supply area.
14, the punching area 16 and the discharge area 18 are sequentially conveyed.
In the container lid body supply area 14, the container lid body supply means 4
A container lid body is supplied to each of the container lid body pedestals 10 by means of which a hole is formed in the connecting projection piece of the container lid body in the perforation area 16, and a hole is formed in the connecting projection piece in the discharge area 18. The container lid main body with the formed is discharged from each of the container lid main body pedestals 10 to the discharge chute 6.

Container Lid Body FIGS. 2-A and 2-B illustrate an example of the container lid body 20 supplied from the container lid body supply means 4 to each of the container lid body pedestals 10 of the punching device body 2. There is. Container lid body 20 that can be formed from an appropriate metal thin plate such as an aluminum-based alloy cover plate, a chromic acid treated steel plate, or a tin plate.
Has a circular top wall 22, a cylindrical skirt wall 24 hanging down from the peripheral edge of the top wall 22, and a connecting protrusion 26 protruding from a part of the free end of the skirt wall 24. Connecting protrusion 26
May project from a portion of the free end of the skirt wall 24 in a radial direction parallel to the central axis or substantially horizontally (perpendicular to the central axis), but may be on the order of 15-60 degrees as shown. Conveniently, it is inclined downward at an inclination angle α and projects radially outward. In the container lid body 20 shown in the figure, a substantially triangular notch 28 is formed in the skirt wall 24 on both sides of the base end of the connecting projection piece 26. Also,
A pair of rupturable lines 30 extending from the notch 28 through the skirt wall 24 and the top wall 22 in an appropriate shape are formed. The pair of breakable lines 30 may be so-called scores. On the inner surface of the top wall 22, a synthetic resin liner (not shown), which may be of a known form per se, may be arranged.

Rotary Punching Device Main Body Referring to FIG. 3, the rotary drilling device main body generally designated by reference numeral 2 is a stationary support shaft extending substantially vertically.
Contains 32. The rotary support 8 is rotatably mounted on the support shaft 32 via an upper bearing 34 and a lower bearing 36. An input gear 38 is fixed to the lower end of the rotary support 8, and the input gear 38 is drivingly connected to a drive source 40 which may be an electric motor through an appropriate transmission mechanism (not shown). Thus, when the drive source 40 is energized, the rotary support 8 is continuously driven to rotate at a predetermined speed in the direction indicated by the arrow 12 in FIG.

An annular support flange 42 is formed in the lower portion of the rotary support 8, and the container lid body pedestal 10 is fixed on the annular support flange 42. Referring to FIG. 4 and FIG. 5 together with FIG. 3, each of the container lid body pedestals 10 has a fan-shaped horizontal wall portion 44 and a circle extending downward from the outer peripheral edge of the horizontal wall portion 44. And an arcuate hanging wall portion 46. Such a container lid body pedestal 10 has a fastening bolt 48 screwed to the annular support flange 42 through a radially inner portion of the horizontal wall portion 44.
Is fixed to the annular support flange 42. The horizontal wall portion 44 has a substantially horizontal top surface, the radially outer portion and circumferential center portion of which define an anvil surface 50, as will become apparent from the description below. As can be seen from FIGS. 4 and 5, such anvil surface 50 includes
Three recesses 52 are formed. Each of the recesses 52 may be a blind hole having a circular cross-sectional shape and extending downward to a predetermined depth.
As clearly shown in FIG. 4, a relatively deep groove 54 extending substantially horizontally in an arc shape is formed on the outer peripheral surface of the hanging wall portion 46 (the function of this groove 54 will be described later). . On the outer peripheral surface of the hanging wall portion 46, a relatively shallow circular recess 56 having a diameter corresponding to the outer diameter of the skirt wall 24 of the container lid body 20 described above is further formed. As will be further referred to later, the container lid body 20 supplied from the container lid body supply means 4 to the container lid body pedestal 10 is received in the container lid body pedestal 10 in a state as shown by a two-dot chain line in FIG. To be That is, the free end of the skirt wall 24 of the container lid body 20 is formed by the circular recess 56.
The connecting projection piece 26 of the container lid body 20 is located on the anvil surface 50. As described above, the connecting protruding piece 26
Is not parallel to the central axis of the container lid body 20 but extends obliquely outward in the radial direction, so that for a substantially horizontal anvil surface 50, the connecting projection 26 has an anvil surface facing the free end thereof. It gradually separates from 50 upwards. If desired, the anvil surface 50 can be made to have an inclined flat surface extending upward in a radially inward direction corresponding to the inclination of the connecting projection piece 26 (in this case, the lower surface of the pressing member described later is also included). It is convenient to have a corresponding inclined surface). The radial movement of the container lid body 20 from the container lid body pedestal 10 in the radial direction is performed by a stationary guide 58 that extends in an arc shape adjacent to the outer peripheral surface of the container lid body pedestal 10 (see also FIG. 1). ) (This stationary guide 58, in particular its upstream and downstream ends, will be referred to further below).

Continuing the description with reference to FIG. 3, an annular support flange 60 having a relatively large thickness and a relatively large diameter is formed at the upper end of the rotary support 8. And this support flange 60
Are circumferentially spaced at equal intervals (12 in the case shown).
Individual) through holes 62 that extend substantially vertically. Each of the through holes 62, which may have a circular cross-sectional shape, is positioned substantially vertically aligned with the anvil surface 50 of each of the container lid body pedestals 10 secured to the support flange 42. It has been confused. An elevating member 64 is attached to each of the through holes 62 so as to be vertically movable. The main part of the elevating member 64 has substantially the same cross-sectional shape as the cross-sectional shape of the through hole 62. Rotation of the elevating member 64 with respect to the through hole 62 is blocked by a key (not shown) interposed therebetween. Lifting member 64 is a support flange 60
A shaft 66 is fixed above the upper end of the shaft 66 and extends substantially horizontally. And such axis 66
A roller 68, which constitutes a cam follower, is rotatably attached to the roller. On the other hand, a substantially cylindrical cam block 70 is fixed to the upper end of the stationary support shaft 32, and a cam groove 72 is formed on the outer peripheral surface of the cam block 70. When the rotary support 8 is rotated in the direction shown by the arrow 12 in FIG. 1, the roller 68 moves along the cam groove 72, whereby the lifting member 64 is moved up and down as required.

The elevating member 64 projects downward beyond the support flange 60, and the punching tool assembly 74 is fixed to the lower end thereof. Referring to FIGS. 4 and 5 in conjunction with FIG. 3, the punch assembly 74 includes a generally cylindrical support 76. An annular flange 78 is formed on the outer peripheral surface of the support 76. The lifting member 64 has a mounting hole 80 extending upward from the lower surface thereof. The upper part of the support 76 is inserted into the mounting hole 80 until the upper surface of the annular flange 78 contacts the lower end of the elevating member 64. And
An annular fastener 82 is screwed onto the outer periphery of the lower end of the elevating member 64. A shoulder portion 84 facing upward is formed on the inner peripheral surface of the fastener 82, and the shoulder portion 84 is brought into contact with the lower surface of the annular flange 78. Thus, the support body 76 is fixed to the lower end of the elevating member 64 by the annular flange 78 thereof being sandwiched between the lower end of the elevating member 64 and the shoulder portion 84 of the fastener 82. The rotation of the support 76 with respect to the elevating member 64 is blocked by a key (not shown) interposed between the inner peripheral surface of the hole 80 and the upper outer peripheral surface of the support 76. The support 76 is formed with three holes 86 penetrating in the vertical direction (only one of the holes 86 is shown in FIG. 4). Each of the holes 86 has a relatively large diameter upper portion 88, a smaller diameter intermediate portion 90 and a relatively large diameter lower portion 92. A punching tool 94 is fixed to each of the holes 86. Punch 94
Each has a large diameter head 96 which is screwed into the upper portion 88 of the hole 86. Each of the punches 94 extends downwardly through the middle portion 90 and the lower portion 92 of the hole 86, and the tip portion (that is, the lower end portion) 98 thereof projects downward beyond the lower surface of the support body 96. The tip portion 98 is formed in a tapered cone shape such as a tapered cone or a tapered pyramid. Each of the punches 94 is formed on the anvil surface 50 of the container lid body pedestal 10. The recesses 52 are positioned so as to be substantially aligned with each other in the vertical direction. As will be discussed in more detail below, during the drilling operation, the tip 98 of each of the punches 94 is advanced into each of the recesses 52 in the anvil surface 50, but the cross-sectional area of each of the recesses 52 is of the punch 94. Larger than the cross-sectional area of each tip 98, each tip 98 of the punch 94 is recessed.
The perforator 94 is inserted into each of the 52.
A gap is left between the tip end portion 98 and the side wall of the recess 52. The upper half of the pressing member 100, which may have a cylindrical shape, is inserted into the lower portion 92 of each of the holes 86 formed in the support body 76, and is mounted with a mounting agent. The above punching tool
Each of the members 94 extends through a hole 102 formed in the center of the pressing member 100, and the lower part of the pressing member 100 surrounds the tip end 98 of the punch 94. Conveniently, the pressure member 100 extends substantially flush with or slightly below the tip of the piercing tool 94. The pressing member 100 is made of an elastic material that can be elastically compressed, such as synthetic rubber.

Container Lid Main Body Supply Area Explaining again with reference to FIG. 1, the container lid main body supply area 14
The container lid main body supply means 4 arranged in relation to the above is equipped with a turntable 104 rotatably mounted about a central axis extending substantially vertically. On the outer peripheral surface of the turntable 104, a plurality of container lid body receiving recesses (not shown) are formed at equal intervals in the circumferential direction. Turntable 104
Are rotated in the direction indicated by arrow 106 in synchronization with the rotation of the rotary support 8 of the punching device body 2 described above.
While the turntable 104 is rotated in the direction indicated by the arrow 106, the container lid body 20 is fed from the feeding chute 110 to the above-mentioned receiving recess of the turntable 104 in the receiving area indicated by the numeral 108. Then, the container lid body 20 is conveyed to the container lid body supply area 14 by the rotation of the turntable 104. In the meantime, from the receiving area 108 to the container lid body supply area 1
Up to 4, the stationary guide 112 extending in an arc shape along the outer circumference of the rotary disc 104 prevents the container lid main body 20 from falling radially outward from the receiving recess. In the container lid body supply area 14, the container lid body 20 is transferred from the receiving recess of the turntable 104 to the container lid body cradle 10 of the punching device body 2. Referring to FIG. 6, on the upstream side of the container lid main body supply area 14, the downstream end portion of the stationary guide 112 is reduced in vertical dimension, and the container lid main body of the punching device main body 2 is reduced. It is made to enter the deep part of the groove 54 formed in the hanging wall part 46 of the pedestal 10. On the other hand, the stationary guide 58 in the punching device main body 2 extends from the downstream side of the container lid main body supply region 14 toward the discharge region 18 (see also FIG. 1). Container lid body supply area 14
In the above, in the receiving recess of the turntable 104 and the circular recess 56 formed on the outer peripheral surface of the hanging wall 46 of the container lid main body support 10.
Are opposed to each other, and the container lid main body 20 is located across the receiving recess and the circular recess 56. That is, the top wall side half of the container lid body 20 is housed in the receiving recess, and the free end side half of the skirt wall is housed in the circular recess 56. Then, on the downstream side of the container lid body supply area 14, the container lid body 20 is allowed to move outward from the receiving recess, but the container lid body 20 moves outward from the circular recess 56. This is prevented by the stationary guide 58. Thus,
The container lid main body 20 is transferred from the receiving concave portion to the circular concave portion 56, and the container lid main body 20 is housed in the circular concave portion 56 and moved together with the container lid main body pedestal 10.

The container lid main body supply means 4 itself may be substantially the same as the configurations disclosed in JP-A-59-191532 and JP-A-59-191533. Regarding the configuration, the above publication is cited and the description thereof is omitted in the present specification.

Punching Area Referring to FIG. 4, FIG. 5, and FIG. 7 together with FIG. 1, the container lid body pedestal 10 of the punching device body 2 and the punching tool assembly 74 pass through the upstream portion of the punching area 16. At this time, the raising / lowering member 64 is gradually lowered, and the punch assembly 74 fixed to the lower end of the raising / lowering member 64 is gradually lowered from the position shown in FIG. 4 to the position shown in FIG. As can be understood by comparing FIG. 4 and FIG. 7, the pressing member 100 of the punch assembly 74 has the connecting projection 26 of the container lid body 20.
Gradual contact from its free end towards the base, which causes the container lid body 20 to gradually swivel in the clockwise direction in FIGS. 4 and 7, and thus the connecting projection 26 is located on the anvil surface of the container lid body cradle. It is forced to extend substantially parallel to 50 and pressed against the anvil surface 50. As will be understood by referring to FIG. 1 in conjunction with FIGS. 4 and 5, a perforation zone is provided to allow the pivoting of the container lid body 20.
At 16, the stationary guide 58 is displaced somewhat radially outward. As the punch assembly 74 continues to descend further,
As shown in FIG. 7, the pressing member 100 is gradually compressed as the punch assembly 74 is lowered. On the other hand, the punch assembly 74
The punching tool 94 of the punching tool 94 continues to descend, and the tip portion 98 of the punching tool 94 penetrates the connecting projection 26 of the container lid body 20 to form a container lid body cradle.
Enter the recess 52 formed in the anvil surface 50 of the 10. Thus, a hole is formed in the connecting projection piece 26 of the container lid body 20. In the illustrated embodiment, the insertion / drilling tool assembly 74 is provided with three drilling tools 94, so that the connecting projection 26 of the container lid body 20 has three holes 114 (see FIG. 8 and FIG. 8). (FIG. 9) is formed.

Thus, the above-mentioned punching work is performed by the tapered cone-shaped tip portion of the punching tool 94.
98 is performed by penetrating the connecting protrusion 26,
Then, in FIG. 7 showing the state where the punching tool 94 is most lowered, between the tip portion 98 of the punching tool 94 and the side wall of the recess 52 that receives the punching tool 94, at least the plate thickness of the connecting projection piece 26 is larger. The gap is left. Therefore,
As can be easily understood, the drilling work is not so-called cutting work, but so-called breaking work that does not generate processing chips. Therefore, in the punching device constructed according to the present invention, there is no problem caused by the processing waste. Also a punch
The tip 98 of 94 and the recess 52 formed in the anvil surface 50.
And does not require high dimensional accuracy, and also the punch 94
The tip portion 98 of the above may have a tapered cone shape capable of penetrating the connecting protruding piece 26, and does not require a sharp cutting edge. Therefore, the punch assembly 74 and the container lid body pedestal 10 are relatively inexpensive to manufacture and have a long life.

On the other hand, since the boring work is performed by the breaking process, as shown in FIG. 9, the inner surface side of the connecting projection piece 26 (that is, the anvil surface) corresponds to the hole 114 of the connecting projection piece 26.
A relatively large fracture burr 116 is formed on the side facing 50). However, as described in detail later, such fracture burrs
There is no inconvenience caused by 116.

Next, when the container lid body pedestal 10 of the punching device body 2 and the punching tool assembly 74 pass through the downstream portion of the punching area 16, the lifting member 64 is used.
Is gradually raised, and the punching tool assembly 74 fixed to the lower end of the elevating member 64 is gradually raised from the position shown in FIG. 7 to the position shown in FIG. Such a punch assembly 74
In the initial stage of the ascending, the tip 98 of the perforation tool 94 recedes upward from the recess 52 formed in the anvil surface 50 and the connecting projection 26 of the container lid body 20. During this time, the pressing member 10
At 0, the compressive force is gradually released and elastically expands. As the punch assembly 74 continues to move upward, the pressing member 100 elastically expanded and restored to its original state also separates upward from the connecting projection piece 26 of the container lid body 20. In this case, the container lid body 20
Is gradually turned counterclockwise in FIGS. 7 and 4, and is returned to the state shown in FIG.

Emission area Continuing the explanation with reference to FIG. 10 together with FIG.
In 18, the container lid main body 20 having the holes 114 formed in the connecting projections 26 is discharged from the container lid main body support 10 to the discharge chute 6. As is clearly shown in FIG. 10, the stationary guide rail for preventing the container lid body 20 from falling out from the circular recess 56 formed in the hanging wall portion 46 of the container lid body pedestal 10. 58 ends upstream of discharge area 18. Therefore, in the discharge area 18, the container lid body 20 is allowed to move outward from the circular recess 56 of the container lid body pedestal 10. In the illustrated embodiment, an air jet type container lid body discharging means 118 is further provided in association with the discharging area 18. The discharging means 118 includes a stationary member 120 having a rail-shaped tip portion located inside the container lid body 20 by entering a deep portion of the groove 54 formed in the container lid body pedestal 10 in the discharging area 18. There is. One or a plurality of injection holes (not shown) opened toward the outside, and thus toward the container lid body 20, at a portion of the tip end portion of the stationary member 120 that faces the container lid body 20. ) Has been formed. The injection hole is connected to a compressed air supply source (not shown) via an air passage (not shown) formed in the stationary member 120. Therefore, the compressed air supplied from the compressed air supply source is jetted from the injection hole to the container lid body 20 located in the circular recess 56 of the container lid body pedestal 10 and thus the circular shape of the container lid body pedestal 10. The container lid body 20 is reliably discharged outward from the recess 56, and the discharge chute 6
Is supplied to. Next, the container lid body 20 is the discharge chute 6
Through, it is transported to an appropriate place such as a collection area.

Formation of Synthetic Resin Grasping Body As shown in FIGS. 11-A and 11-B, the synthetic resin grasping body 122 is integrally connected to the connecting projecting piece 26 of the container lid body 20. The illustrated gripper 122 is molded from a suitable synthetic resin such as polyethylene or polypropylene.
Has a substantially rectangular ring shape as a whole, and its base portion 124
Surrounds at least the free end (the hole 114 is formed in the free end) of the connecting projection 26. Such a gripping body 122 is directly injection-molded or compression-molded so as to have a relationship as shown in FIGS. 11-A and 11-B with respect to the connecting projection piece 26 of the container lid main body 20. By molding itself, the base portion 124 of the grip body 120 is integrally connected to the connecting projection piece 26 of the container lid body 20. As clearly shown in FIG. 12, when the grip body 122 is formed as described above, the synthetic resin is also introduced into the hole 114 formed in the connecting projection piece 26, whereby the base portion of the grip body 122 is formed. The connection between 124 and the connecting projection piece 26 is reinforced. Base 1 of gripper 122
The 24 also covers the break burrs 116 created during the formation of the holes 114, so that no disadvantages result from the presence of the break burrs 116. On the contrary, the base portion 124 of the grip body 122 has a rupture burr.
By covering 116, the connection between the base portion 124 of the grip body 122 and the connecting projection piece 26 is further enhanced.

The gripping body 122 is of course not limited thereto, but the specification of the patent application (the title of the invention: compression molding apparatus) dated June 3, 1987, which the present inventors previously proposed. And can be conveniently molded by the compression molding apparatus disclosed in the drawings. In this case, the container lid main body 20 discharged from the punching device main body 2 in the discharge area 18 is directly supplied to the compression molding device main body in the compression molding device by, for example, a rotary turret type transport mechanism without being supplied to the discharge chute 6. Can be supplied to.

As described above, one specific example of the punching position configured according to the present invention has been described in detail, but the present invention is not limited to the specific example, and various variations and modifications can be made without departing from the scope of the present invention. What is possible doesn't require much.

[Brief description of drawings]

FIG. 1 is a simplified cross-sectional view showing the entire punching device constructed according to the present invention. 2A and 2B are a perspective view and a cross-sectional view showing the container lid body, respectively. FIG. 3 is a vertical cross-sectional view showing a rotary punching device body in the punching device shown in FIG. 1. FIG. 4 is a partial cross-sectional view showing a container lid body pedestal and a punching tool assembly in the punching device body shown in FIG. 3. FIG. 5 is a partial perspective view showing a container lid body pedestal and a punching tool assembly in the punching device body shown in FIG. 3. FIG. 6 is a partial perspective view showing a container lid main body supply area in the punching device shown in FIG. 1. FIG. 7 is a partial cross-sectional view showing a punching operation by the container lid body support and the punching tool assembly in the punching device body shown in FIG. 3. FIG. 8 is a perspective view showing a container lid main body in which a hole is formed in the connecting protruding piece. FIG. 9 is an enlarged cross-sectional view showing a part of the container lid main body shown in FIG. 8. FIG. 10 is a partial perspective view showing a discharge area in the punching device shown in FIG. 1. FIG. 11-A and FIG. 11-B are a perspective view and a cross-sectional view, respectively, showing a container lid including a container lid main body and a gripping body connected to the connecting projecting piece. FIG. 12 is an enlarged sectional view showing a part of the container lid shown in FIGS. 11-A and 11-B. 2 ... Rotary punching device main body 4 ... Container lid main body supply means 8 ... Rotating support 10 ... Container lid main body cradle 14 ... Container lid main body supply area 16 ... Perforation area 18 ... Discharge area 20 ... … Container lid body 26 …… Connecting protrusion 50 …… Anvil surface 52 …… Concave 74 …… Punch tool assembly 94 …… Punch tool 98 …… Punch tool tip 100 …… Pressing member 114 …… Hole 116 ...... Breakage burr 118 …… Container lid main body discharge means 122 …… Grip body

Claims (5)

[Claims] 1. A container lid body pedestal having an anvil surface, which is a punching device for forming at least one hole in a connecting projecting piece of a metal container lid body, and a container lid body pedestal comprising: A perforator assembly that is moved relative to the anvil surface in a direction toward and away from the anvil surface, the container lid body pedestal having the connecting projection positioned on the anvil surface. A piercer assembly configured to receive a body, the piercer assembly including at least one piercer projecting toward the anvil surface, the piercer having a tapered cone shaped tip, The anvil surface is formed with at least one recess into which the tip of the perforator is inserted so as to penetrate through the connecting projection of the container lid body, and the cross-sectional area of the recess is made to enter therein. Cross-section of the tip of the punch Greater than, drilling devices present a gap, it is characterized in between the tip portion of the side wall and the perforations Anagu of the recess in a state in which the tip of the puncture Anagu the recess enters. 2. The punching tool assembly includes a pressing member made of an elastic material surrounding a tip portion of the punching tool, and the tip of the punching tool acts on the connecting projection of the container lid main body or at the same time. 2. The punching device according to claim 1, wherein the pressing member acts on the connecting projection of the container lid body to press it against the anvil surface. 3. The punching device according to claim 2, wherein the pressing member is made of synthetic rubber. 4. A rotary shaft support mounted rotatably about an axis extending substantially vertically, the rotary support having the container lid body pedestal with the anvil surface facing upward. A plurality of punching tool assemblies are mounted on the container lid body pedestal so as to be movable up and down in correspondence with the container lid body pedestals. By the rotation, the container lid main body cradle and the perforation tool assembly are sequentially conveyed through the container lid main body supply area, the perforation area and the container lid main body discharge area, and the container lid main body reception area is conveyed in the container lid main body supply area. A container lid body supply means is provided for supplying the container lid body to the table to position the connecting projection on the anvil surface, and the container lid body is provided in the container lid body discharge area. Container lid body discharge for discharging from the container lid body cradle Means are provided, in the perforation area, the perforation tool assembly is lowered so that the tip of the perforation tool penetrates through the connecting projection of the container lid body and enters the recess, The punching device according to any one of claims 1 to 3, wherein the punching tool assembly is then raised and separated from the container lid body. 5. The container lid body has a circular top wall and a cylindrical skirt wall extending from the periphery of the top wall, and the connecting protrusion projects from a part of a free end of the skirt wall. The punching device according to any one of claims 1 to 4.