JPH0712506B2 - Forming method and forming machine for loop shaped member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a loop-shaped molded object for forming a loop-shaped member such as a metal coupling band used for tightening a hose, tightening a boot of a universal joint, or the like into a predetermined shape. The present invention relates to a molding method and a forming machine for a member.

(Prior Art) A loop-shaped molding object of the present invention is a metallic bonding band 1 shown in FIGS. 7 and 8. This metallic bonding band 1 has already been proposed by the present applicant (Japanese Patent Publication No. 52-14702). The metal binding band 1 will be described. A band portion 2 in which a band-shaped steel material cut into a predetermined length is formed in a ring shape, and a lever 3 which is welded to a polymerized end of the band portion 2 and curvedly formed. A strip-shaped steel material cut into a predetermined length is bent into a U-shape, and is composed of a fastener 4 which is welded to a predetermined position of the strip portion 2 so that both ends thereof face outward.

Further, the applicant of the present application has proposed a manufacturing apparatus for automatically manufacturing the metal coupling band 1 (Japanese Patent Publication No. 58-2555).
No. 0).

(Problems to be Solved by the Invention) However, in the above-described apparatus for manufacturing a metal coupling band, the end portion 2a where both ends of the band portion 2 are superposed and the end portion of the lever 3 are overlapped.
Since the band 3 is overlapped with 3a and welded, the band 2 is formed flat as shown in FIG. For this reason, it becomes difficult to insert a hose or the like into the band portion 2.

The present invention is made in view of the above problems, and a forming method and a forming method of a loop-shaped forming member for forming a loop-shaped formed member such as a metal bonding band that is temporarily formed flat into a predetermined shape. The purpose is to provide a machine.

(Means for Solving the Problems) In order to solve the above problems, the present invention has the following configuration.

That is, the method of forming the loop-shaped member to be molded is arranged so as to be parallel to each other at a predetermined interval and on the outer peripheral surface of the virtual cylinder, the rear end is fixed to the base, and the front end is the free end. Using a molding machine equipped with a plurality of elastic rod-shaped pressing members, the tip end side of the pressing member is pressed by the constriction means against the elastic force of the pressing member to be narrowed, and the tip end of the pressing member Side is inserted into a temporarily formed member to be molded in a state of being connected in a loop, and the member to be molded is held by the tip end side of a rod-shaped pressing member by releasing the narrowing means, while pressing the plurality of pressing members. Placed in the space formed by the members,
In addition, a regulating member that is slidable in the length direction of the pressing member,
While moving to the tip side of the pressing member and pressing the member to be molded held on the tip side of the pressing member from the inside through the pressing member to expand the member to be stretched, the tip side of the pressing member When the regulating member is moved forward, the member to be molded held on the tip side of the pressing member is pressed so as not to come off the tip of the pressing member.

In addition, the molding machine for the loop-shaped molded member is arranged so as to be parallel to each other with a predetermined distance and on the outer peripheral surface of the virtual cylinder, the rear end is fixed to the base, and the front end is the free end. A plurality of elastic rod-shaped pressing members, and a plurality of molded members tentatively formed in a loop-like shape that are arranged so that they can be brought into contact with and separated from the outer periphery of the rod-shaped pressing member near the tip side. A plurality of pressing means for pressing the tip side of the pressing member against the elastic force of the pressing member so that the tip side of the pressing member can be inserted; In the space formed by the plurality of pressing members, the pressing members are slidably arranged in the length direction of the pressing member, and when the pressing members are moved to the distal end side, the distal ends of the plurality of pressing members are radially outward. Spread the molded member mounted on the tip side of the pressing member through the pressing member. A restricting member that presses from the inside and expands to an expanded state, a driving unit that drives the restricting member to the tip side of the pressing member, and a tip of a plurality of pressing members by moving the restricting member to the tip side of the pressing member. When spreading the side outward in the radial direction, in order to prevent the molded member mounted on the pressing member tip side from coming off, at a position that closes the tip side of the pressing member,
And a stopper plate movably provided from the side of the pressing member.

(Operation) The operation will be described.

While inserting the tip of the rod-shaped pressing member into the inside of the loop-shaped member to be molded such as a metal engaging band by squeezing it, while pressing the tip of the pressing member so that the member to be molded does not come off, press the tip of the pressing member. By expanding to the outside in the radial direction, the member to be molded is pressed into a desired shape and the member to be molded is expanded to the expanded state.

(Examples) Hereinafter, preferred examples of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of a molding machine for forming a loop-shaped member, and FIG. 2 is a plan view.

The molding machine 10 of this embodiment includes a burr removing mechanism 12 for removing burrs from the lever 3 of the metal joint band 1 and a lever forming mechanism 14 for forming the lever 3 of the metal joint band 1 into an arc shape.
And a loop-shaped forming mechanism 16 for forming the belt portion 2 of the metal coupling band 1 into a circular shape.

First, the burr removing mechanism 12 and the lever forming mechanism 14 will be described with reference to FIGS. 1 to 5.

A deburring mechanism 12 and a lever molding mechanism 14 are provided on the left side of the machine frame 18 on which the molding machine 10 is placed in FIGS. 1 and 2.

Reference numeral 20 denotes a base, on the upper surface of which is formed a convex dove 20a in the longitudinal direction. A bending table 22 is fixed by abutting on the tip side (the forming mechanism 16 side) of the base table 20. In addition, the dovetail 20a on the upper surface of the base 20 and the dovetail groove 2 on the lower surface of the slide plate 24
4a is engaged and slidable. A longitudinal groove 26 is formed on the upper surface of the slide plate 24. Further, a step 28 having the same height as the concave groove 16 is formed at the tip of the slide plate 24. Further, the operating plate 30 is arranged in the groove 26,
The inside is guided by the groove 26 and is movable in the longitudinal direction.
Then, a thin operation plate plate 30a extending continuously from the upper surface of the operation plate 30 is formed at the tip of the operation plate 30 (extends like a canopy), and a space is formed below the operation plate 30a. .

On the other hand, a mounting plate 32 is fixed on the step 28 at the tip of the slide plate 24 (almost half of the mounting plate 32 is mounted on the step 28), and the upper surface of the mounting plate 32 and the lower surface of the operation plate 30a. Are formed to a height that substantially coincides with.

Further, two holes 30b, 30b are formed in parallel from the front end surface of the operation plate 30 toward the longitudinal direction (rearward) of the operation plate 30, and springs 34, 34 are arranged in the holes 30b, 30b. The tips of the springs 34, 34 hit the mounting plate 32 and urge the plate 30 away from the operating plate 30 (see FIG. 3). Also, the operating plate 30
A groove-shaped recess 30c is formed on the upper surface of the operating portion 30a.

Further, a standing wall 36 for fixing the cylinder is fixed in contact with the rear end of the base 20. Plunger 38 of cylinder 38, which is fixed to this upright wall 36 and uses air pressure or hydraulic pressure as a drive source
a The front end is connected to the rear end of the operating plate 30.

Reference numeral 40 is a stopper block fixed on the slide plate 24 so as to straddle the concave groove 26 of the slide plate 24. Also,
A screw rod 44 is screwed in a longitudinal direction with a stopper 42 fixed on an operation plate 30 that moves along the concave groove 26 of the slide plate 24. The rear end of the screw rod 44 contacts the stopper block 40 to position the moving plate 30 at the retracted position.

Reference numeral 46 is a positioning tool for mounting the mounting plate 32 of the metal coupling band 1. This positioning tool 46 is a step of the slide plate 24 via a flat trapezoidal mounting tool 48 fixed to the operation plate 30.
It is arranged on the mounting plate 32 of 28. Further, the portion of the positioning tool 46 on the mounting plate 32 is formed thin toward the center, and a notch 46a for determining the position of the metal coupling band 1 is provided. The flat band portion 2 of the metal binding band 1 is located in the notch 46a. And the mounting plate
An upright wall 32a is formed on a portion of the upright wall 32 that faces the positioning tool 46, and the tip of the lever 3 of the metal coupling band 1 is formed on the upright wall 32a.
Positioned on a.

A step 50 is formed on the side of the slide plate 24 of the bending table 22 and is formed at the same height as the step 28 of the slide plate 24. Then, when the cylinder 38 is driven, the operating plate 30 moves forward, and along with this, in the direction in which the mounting plate 32 and the holes 30b, 30b of the operating plate 30 are separated via the springs 34, 34. Since it is biased, the mounting plate 32 also slides together. Further, since the mounting plate 32 and the slide plate 24 are integrally fixed, they slide together with the operation plate 30. And slide plate
The end surface of 24 collides with the end surface of the bending table 22 (the end surface of the mounting plate 32 hits the vertical surface of the step 50). The mounting plate 32 is a slide plate.
It is placed on both the step 28 of 24 and the step 50 of the bending table 33.
Further, since the operating plate 30 is pushed forward by the springs 34, 34 against the biasing force, the flat metal coupling band 1 held together with the operating plate 30 in the notch 46a of the positioning tool 46 is formed.
Is slid on the mounting plate 32 and sent to a predetermined position on the bending table 22. A lower die 52 that forms the lever 3 in an arc shape is disposed at a position corresponding to the lever 3 of the sent metal coupling band 1.

A step 52a is formed on the lower mold 52 so as to follow the step of the joint between the lever 3 and the band 2. Further, an eject pin 56 urged by a spring 54 projects from the bottom surface of the lower mold 52 so as to be freely inserted and removed (see FIGS. 3 and 4). The corresponding punch 56 of the lower die 52 is provided with the support column 58 provided side by side on the bending table 22.
It is fixed to a moving block 60 that moves up and down along.
A bottomed hole 62 is bored upward from the lower surface of the moving block 60, and a bar member 64 standing upright from the bending table 22 enters the hole 62. In addition, a long spring that winds the bar 64
66 is arranged to urge the moving block 60 upward (away from the bending table 22) (see FIG. 5).

On the other hand, an arm member 68 is pivotally attached to the top of the support column 58 via a shaft 69, the tip of the arm member 68 contacts the upper surface of the moving block 60, and the rear end of the arm member 68 is connected to the plunger 70a of the cylinder 70. ing. Therefore, when the cylinder 70 is driven to extend the plunger 70a upward, the arm member 68 rotates about the shaft 69, and the tip of the arm member 68 pushes down the moving block 60. Then, when the drive of the cylinder 70 is released, the moving block 60 is pushed upward by the biasing force of the spring 66.

The burr removal mechanism 12 is provided on the base 20 side of the pillar 58. The burr removing mechanism 12 will be described.

The fixing plate 80 is fixed to the pillar 58, and
The side surface of 80 is in contact with the moving block 60. Also, the fixed plate
A tapered surface 80a with an inclination of about 45 degrees is formed at the bottom of 80,
A crushing rotary body 82 that rotatably crushes the burr on the end 3a of the lever 3 of the metal coupling band 1 is provided on the tapered surface 80a. A radial bearing or the like may be used for the crushing rotary body 82. Then, when the burr portion of the lever 3 passes below the corner portion 82a of the crushing rotary body 82, the burr is removed. On the other hand, a planar L-shaped support frame 84 is fixed from the fixed plate 80 so as to surround the moving block 60, and has a role of a guide for the moving block 60 (see FIG. 2).

Reference numeral 86 is a stopper plate located in front of the bending table 22, and the stopper plate 86 is a guide groove (not shown) formed on the machine frame 18.
The front end of the bending table 22 can be closed by being guided to.
The stopper plate 86 is connected to a plunger 90a of a cylinder 90 fixed to a fixed piece 88 fixed to an end edge of the machine frame 18.

Next, the loop-shaped forming mechanism 16 will be described. The loop forming mechanism 16 is disposed on the right side portion of the upper machine casing 18 shown in FIGS. 1 and 2.

The loop-shaped forming mechanism 16 will be described with reference to FIGS. 1, 2 and 6.

Reference numeral 92 is a base member of the loop-shaped forming mechanism 16.
A dovetail 92a having a convex shape in the longitudinal direction is formed on the upper surface of the. 9
4 is a slide block, and this slide block 94
The dovetail groove 94a is formed on the lower surface of the base plate, and the dovetail groove 94a is engaged with the dovetail groove 92a of the base member 92 and is slidable. Fixed plate 96 behind the base member 92
Is erected and the cylinder 98 is fixed. This cylinder
The plunger 98a of 98 is connected to the slide block 94,
The slide block 94 is moved by the driving force of the cylinder 98.

A standing wall 100 is erected on the upper rear surface of the slide block 94,
A through hole 102 is formed in the center of the standing wall 100, and a rear end of a rod-shaped wire 104 as a pressing member is planted around the through hole 102 so as to draw a virtual circle.
Therefore, the wires 104 ... Are arranged so that they are located on the outer peripheral surface of the virtual cylindrical body as a whole. Standing wall 100
A cylinder block 108 is fixed to the back surface of the cylinder 110, and a cylinder 110 is fixed to the cylinder block 108. The plunger 110a of the cylinder 110 extends from the through hole 120 of the standing wall 100 and is connected to the drive bar 112. And the drive bar 112
A disc-shaped regulating member 114 is fixed to the tip of the. Circularly formed through holes 116 ... In the same number as the wires 104 ... The wire 104 ... penetrates through the through hole 116 ...
The free end is in the extension direction.

A guide wall 118 extending in the width direction is fixed to the front end surface of the slide block 94, and a notch 119 is formed at the center of the guide wall 118 so that the wires 104 ... Then, the fixing pieces 120, 120 for fixing the cylinder are fixed to both ends of the guide wall 118.
Cylinders 122 and 122 are fixed to 20 respectively. Plungers 122a and 122a of the cylinders 122 and 122 are connected to slide pieces 124 and 124. This slide piece 12
Convex portions 124a, 124a are formed on the surfaces of 4, 124 in contact with the guide wall 118. Then, the convex portions 124a, 124a engage with the groove-shaped concave portions 118a formed in the front surface of the guide wall 118 in the longitudinal direction,
The two slide pieces 124, 124 slide so that they can come into contact with and separate from each other.

In addition, pressing plates are provided on the front surfaces of the slide pieces 124, 124, respectively.
126 and 128 are fixed. The operation plates 126 and 128 are slightly displaced in the wire extending direction, and the slide piece 12
When 4 and 124 approach each other, the tips overlap each other. A notch 126a, which is notched in a V shape and has a small semicircular center portion, is formed at the tip edge of one of the pressing plates 126.
A semi-circular cutout 128a is formed at the tip edge of the other pressing plate 128. A semi-cylindrical guide plate 128b having a tapered tip is fixed to the notch 128a. For this reason, when the pressing plates 126, 128 are driven closer to each other by driving the cylinders 122, 122, the tips of the pressing plates 126, 128 overlap, so that the pressing plates 126, 128 have notches 126a, 128a (guide plates).
128b) reduces the diameter of the wires 104 ...
The pressing plates 126 and 128 are for reducing the diameter of the free ends of the wires 104, ..., And constitute pressing means.

The operation of the molding machine of the above embodiment will be described.

(A) First, attach the flat metal bonding band 1 to the mounting plate 32.
Place on top. At this time, the tip of the lever 3 is brought into contact with the upright wall 32a, and the flat strip 2 is cut out of the positioning tool 46.
Attach to 46a.

(B) When the cylinder 38 is driven, the operating plate 30 and the mounting plate 32
And the slide plate 24 is integrally bent along the dovetail 20a 2
Slide in two directions. Then, the step 50 of the bending table 22 and the side surface of the step 28 of the slide plate 24 come into contact with each other, and the mounting plate 32
The bottom surface of the front end of the intruder invades (moves forward) so as to contact the step 50 of the bending table 22.

(C) Subsequently, the operating plate 30 is pushed, and the mounting plate 32 and the operating plate are pressed.
The operation plate 30a moves forward against the urging force of the springs 34, 34 interposed between them, and the positioning tool 46 fixed to the operation plate 30 also moves forward accordingly, and the metal coupling band 1 is bent. twenty two
Send it to the position of lower mold 52. At this time, the metal binding band 1
The lever 3 passes under the crushing rotary member 82 to remove burrs. The recesses 30c of the operating plate 30 and the operating plate 30a are escape grooves for the crushing rotary body 82.

(D) The punch 56 is lowered to form an overlapping portion (joint) of the lever 3 and the band portion 2 of the metal coupling band 1 located on the lower die 52 in an arc shape (since the operation of the punch 56 is described above. Omitted).

(E) While holding the metal coupling band 1 between the lower die 52 and the punch 56, the operation plate 30 (the operation plate 30a and the positioning tool 4
6) retreats.

(F) On the other hand, in the loop-shaped forming mechanism 16, the cylinder
122, 122 are operated to bring the pressing plates 126, 128 close to each other to reduce the diameter of the wires 104 ... (Indicated by a chain double-dashed line in FIG. 1).
In this state, the cylinder 98 is operated to move the slide block 94 forward. Then, the levers 3 are sandwiched between the lower die 52 and the punch 56, and the strip portion 2 is slightly floated from the lower die 52.
Insert the tip of the wire 104 ... Then, at the same time when the punch 56 is raised, the cylinders 122, 122
Is actuated to release the reduced diameter state of the wires 104, and the tips (free ends) of the wires 104 become free so that the diameter is increased and the metal binding band 1 is held.

(G) With the metal binding band 1 held by the wires 104, ..., The cylinder 98 is operated and the slide block 94 is slightly retracted. Then, the cylinder 90 is operated to position the stopper plate 86 on the front surface of the metal coupling band 1.

(H) Then, the cylinder 110 is operated to drive the drive bar 1
The restricting member 114 is advanced via 12. Then, the diameters of the wires 104 are simultaneously expanded to the same extent as the positions of the through holes 116 of the restriction member 114, so that the band portion 2 of the metal coupling band 11 is formed into a circular shape. At this time, the stopper plate 86 is positioned behind the metal coupling band 1 (a position that closes the tip 104 side of the wires 104 ...), and the metal coupling band 1 is connected to the wire 10.
It prevents it from coming off from 4.

(I) Subsequently, when the cylinder 98 operates and the slide block 94 retracts, the cylinder 130 operates and the strip 2
The metal joint band 1 formed in a circular shape is dropped, and the bending table 22 is formed in the machine frame 18 between the loop-shaped forming mechanisms 16 through the holes formed in the machine frame 18.
It is stored in an appropriate storage case (not shown) below 132.

By repeating the same operation as above, the coupling bands are sequentially formed in a circular shape.

Through the above steps, a highly accurate metal bonding band 1 having the band portion 2 formed in a substantially circular shape can be obtained. That is,
Metal binding band 1 using multiple wires (pressing members)
The metal coupling band 1 can be expanded in the extension direction by pressing outward from the inside in the radial direction.

It is possible to form a loop-shaped molded member having a predetermined width into a perfect circular shape by using the loop-shaped molding mechanism of the above-mentioned molding machine, but the molded member is not a circular member but an oval shape, a triangular shape,
Even a polygon such as a quadrangle may be arranged so as to be located on the outer peripheral surface of the shape in which the pressing member such as a wire is to be planted and the shape of the through hole of the regulating member is to be obtained.

It should be noted that the pressing member includes not only a rod member such as a wire but also a narrow plate-shaped member.

Although various descriptions have been given with reference to the preferred embodiments of the present invention, the present invention is not limited to the above embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. Is.

(Effects of the Invention) As described above, according to the present invention, since a plurality of rod-shaped pressing members are inserted into the inside of a member to be molded (for example, a metal coupling band) in a state where the tips are narrowed, it is temporarily molded flatly. It can also be easily inserted inside the existing molded member. Then, while preventing the molded member from coming off from the tip of the pressing member, it is pressed in the radial direction from the inside of the molded member to expand the molded member to an expanded state, thereby reliably forming the molded member into a desired shape. It has a remarkable effect that it can be formed.

[Brief description of drawings]

1 to 6 show an embodiment of a molding machine for a loop-shaped molded member of the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is molding of a loop-shaped molded member. FIG. 4 is a plan view showing a part of the molding machine, FIG. 4 is a side view showing a part of the molding machine for the same loop-shaped molded member, FIG. 5 is a view taken in the direction of arrow B in FIG. 1 of the molding machine, and FIG. It is a view on arrow A in FIG. 1 of the molding machine.
FIG. 7 is a perspective view of the metal binding band before tightening, FIG. 8 is a front view of the metal binding band in a tightened state, and FIG. 9 is a perspective view of the metal binding band. 10 …… Molding machine, 12 …… Burr removal mechanism, 14 …… Lever molding mechanism, 16 …… Loop molding mechanism, 18 …… Machine frame, 20 …… Base, 24 …… Slide plate, 30 …… Actuation Plate, 104 …… Wire, 114 …… Regulator, 126,128 …… Pressing plate.

Claims (2)

[Claims] 1. A plurality of elastic members, which are arranged in parallel with each other at a predetermined interval and on the outer peripheral surface of a virtual cylinder, whose rear end is fixed to a base and whose front end is a free end. Using a molding machine equipped with a rod-shaped pressing member, the tip end side of the pressing member is pressed by the constriction means against the elastic force of the pressing member so that the tip end side is connected in a loop shape. In the space formed by the plurality of pressing members, while holding the member to be molded on the tip side of the rod-shaped pressing member by inserting it into the member to be molded that has been temporarily molded into the state and releasing the narrowing means. Placed in
In addition, a regulating member that is slidable in the length direction of the pressing member,
While moving to the tip side of the pressing member and pressing the member to be molded held on the tip side of the pressing member from the inside through the pressing member to expand the member to be stretched, the tip side of the pressing member A method for forming a loop-shaped forming target member, wherein the forming target member held on the front end side of the pressing member is pressed so as not to come off the front end of the pressing member when the regulating member is moved forward. 2. A plurality of elastic members, which are arranged in parallel with each other at a predetermined interval and located on the outer peripheral surface of a virtual cylinder, whose rear end is fixed to a base and whose front end is a free end. And a rod-shaped pressing member, and the tips of the plurality of pressing members are formed on a member to be molded which is arranged so as to be able to come into contact with and separate from the outer periphery of the rod-shaped pressing member in the vicinity of the tip side thereof, and which is temporarily formed in a loop-shaped connected state. The pressing member is formed by a plurality of pressing members, and a purging means for pressing the distal end side of the pressing member against the elastic force of the pressing member so as to be able to insert the side of the pressing member, thereby purging the distal end sides of the plurality of pressing members. Is arranged slidably in the longitudinal direction of the pressing member in the space, and when moved to the tip side of the pressing member, the tip sides of the plurality of pressing members are spread outward in the radial direction, and the pressing member tips are extended. The molded member mounted on the side is pressed from the inside via the pressing member and stretched. And a drive means for driving the regulating member to the tip end side of the pressing member, and moving the tip end side of the plurality of pressing members to the outer side in the radial direction by moving to the tip end side of the pressing member of the regulating member. At this time, in order to prevent the molded member mounted on the tip side of the pressing member from coming off, a stopper movably provided from the side of the pressing member at a position closing the immediate vicinity of the tip side of the pressing member. A plate-shaped molding machine for forming a loop-shaped member.