JPH07236925A - Material feeding device - Google Patents

Abstract

PURPOSE:To provide a small inexpensive material feeding device which enables a high-speed and continuous press work of various kinds while successively feeding a material, in feeding wire and strip materials in a fixed length. CONSTITUTION:A material feeding mechanism 5, in which a half-moon cell 13 is gripped with the pressure of a spring between a opening/closing gripper 10, 31 for holding/transporting a material A and a shaft 12 for opening/closing the gripper, and in which an operation for chucking and that for feeding the material A are freely linked at the half-moon cell 13 part, is connected with a pressurizing unit 3 that is equipped with dies; and a press work of various kinds is thereby carried out at high speed and also continuously while the material A is successively fed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material feeding device used for feeding a wire rod, a strip plate or the like at a constant size and having a pressure processing function such as cutting, punching, bending or drawing. It is a thing.

[0002]

2. Description of the Related Art A conventional material feeding device of this type will be described with reference to the drawings.

FIG. 13 is a perspective view of a main part showing the structure of a conventional material feeding device, and the drive shaft 50 is not described in detail.
The pair of rollers 55 and 56 rotate in conjunction with the rotation of
The material A inserted between the pair of rollers 55 and 56 is configured to be fed at a constant size by intermittent rotation.

Further, FIG. 14 shows an example in which a fixed lower die 52 and a press machine 51 to which a vertically movable upper die 54 is attached and the above-mentioned conventional material feeding device are used in combination. As shown in the timing chart of FIG. 3, the material A is fed by the feed amount X while the rollers 55, 56 are rotated by 0 ° to 180 ° in the material feeding device, and then the same is fed by 180 ° to 360 °.
While rotating, the press machine 51 moves the upper die 54 to the stroke amount Y.
16 by operating the A. minute operation. Punching, B. Cutting, C.I. Bending, D. Molding,
E. Crushing, F. It was configured to sequentially perform various press workings such as caulking.

[0005]

However, in the above-mentioned conventional construction, when the material A to be fed at a constant size is a soft resin or a thin wire, the material A is in a line contact state between the rollers 55 and 56 shown in FIG. As a result, the material A is deformed due to local pressure, and there is a problem in that it is impossible to perform accurate constant-size feed.

Further, in the structure in which the press machine 51 and the material feeding device are connected as shown in FIG. 14, not only the entire device including the connecting device for interlocking the both becomes large and expensive, but also the press working position. To the material feeder B
Has a problem that the feed accuracy is poor because the variation in the feed amount is accumulated by the number of times of the feed amount X of the material A corresponding to the distance B, for example.

Further, as can be seen from the timing chart of FIG. 15, there is a problem that the production efficiency is poor and it is difficult to increase the speed because the material A cannot be pressed until it is sent.

SUMMARY OF THE INVENTION It is an object of the present invention to solve such a conventional problem, and to provide a material feeding device which is simple in structure, small in size, low in cost and high in speed. .

[0009]

In order to solve the above-mentioned problems, a material feeding device according to the present invention has a U-shaped spring chuck having a spring property attached to at least one tip end portion thereof and can be opened and closed so as to hold a material. And a pair of opening / closing grippers fitted in the slide shaft so as to be slidable in the axial direction, a sliding cell fitted in the slide shaft and sliding the pair of opening / closing grippers in the axial direction, the pair of opening / closing grippers and sliding. A pair of opening / closing via a cam shaft provided with respective cams for driving the cells and connected to the drive unit, and a half-moon cell having a semicircular cross section which is driven by the cams provided on the cam shaft and closely arranged. The gripper opening / closing shaft is configured to open / close the gripper.

[0010]

With this structure, a pair of opening and closing grippers holding a material by a U-shaped spring chuck having a spring property slides by a certain amount to feed the material at a fixed size, thereby performing a combined operation of holding and feeding the material. It is possible to perform a highly accurate feeding operation by freely interlocking with each other, and even when the material is a soft resin or a thin wire material, it is possible to stably feed the material without deformation.

[0011]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the external shape of the material feeding apparatus according to the embodiment. In FIG. 1, 3 is a pressing unit, 5 is a material feeding mechanism, and 7 is a driving section.

FIG. 2 is a perspective view showing the internal construction of the apparatus shown in FIG. 1, in which 1 and 2 constituting the pressurizing unit section 3 are a lower die and an upper die, and 28 is an additive. Pressure cam,
Reference numeral 29 is a swing lever, and A is a material which is a workpiece, and the material A is conveyed in the direction of the arrow in the figure.

FIG. 3 is a perspective view showing the details of the material feeding mechanism portion 5 shown in FIGS. 1 and 2, wherein 6 is a cam shaft which is a shaft indicated by the center line C, and 17 is a shaft. A slide shaft serving as a shaft indicated by the center line D, reference numerals 8 and 9 denote a lower chuck for holding the material A and a U-shaped spring chuck having a spring property.
Reference numeral 11 denotes an opening / closing gripper that connects the lower chuck 8 and the U-shaped spring chuck 9 to each other.
Numeral 11 is inserted through the shaft hole 15 so as to be opened and closed by using the shaft 40 of the sliding cell 42 as a fulcrum shaft, and the snap ring 4 is coupled to the end portion of the shaft 40. Further, in the corner portion 41 of the sliding cell 42, which is provided with a rotation stopper (not shown),
In order to make the sliding cell 42 reciprocate in the direction of the arrow in the drawing, the rib portion of the feed cam 20 is connected so as to sandwich the two rollers 19, and the slide shaft 17 penetrates the sliding cell 42.

Reference numeral 13 is a half-moon cell, the detailed shape of which is shown in FIG.
The gripper opening / closing shaft 12 is configured by including the
The flat portion 22 is brought into contact with the opening and closing grippers 11, and the semicircular surface portion 21 is provided so as to come into contact with the opening and closing grippers 10 and 11, as shown in FIG. The meniscus cell 13 is sandwiched between the gripper opening / closing shafts 12 from both sides and pressed by springs 14. Reference numeral 16 is a connecting lever connected to the gripper opening / closing shaft 12, and is made to swing by the rotation of the opening / closing cam 18 via a roller 16a attached to the tip.

6 and 7 are sectional views taken along the line aa of the portion indicated by aa in FIG. The operation of the material feeding apparatus according to this embodiment configured as described above will be described below.

First, as shown in FIG. 6, when the convex portion of the opening / closing cam 18 pushes up the roller 16a of the connecting lever 16, the plane portion 23 of the gripper opening / closing shaft 12 is brought into a vertical state, which is shaded through the half-moon cell 13. The lower chuck 8 connected to the opening / closing gripper 10 and the U-shaped spring chuck 9 connected to the opening / closing gripper 11 grip the material A, and in this state, the sliding cell 42 shown in FIG. The material A can be sent to a predetermined size.

Further, FIG. 7 shows an operation reverse to that of FIG. 6, and when the opening / closing cam 18 rotates to become a portion other than the convex portion, the connecting lever 16 having the roller 16a is lowered to lower the gripper opening / closing shaft. 12 tilts, lower chuck 8 and U
The V-shaped spring chuck 9 releases the material A.

FIG. 8 shows an example in which the half-moon cell 13 used in the above embodiment is changed to a half-moon cell 24 having a different shape. The half-circular surface portion 60 of the half-moon cell 24 is shown.
Since the center of the gripper is installed so as to coincide with the shaft core 26 of the gripper opening / closing shaft 12, the opening / closing gripper 10 shown by hatching does not open / close even if the gripper opening / closing shaft 12 swings. Only 11 will move. By changing the center position of the semicircular surface portion 60 of the meniscus cell 24 with respect to the axis 26 in this manner, the movement and the amount of movement of the opening and closing grippers 10 and 11 can be changed.

Further, as shown in FIG. 2, the material feeding mechanism 5
By assembling the pressure cam 28 for vertically moving the upper mold 2 of the pressure unit portion 3 arranged adjacent to, the opening / closing cam 18 and the feed cam 20 into the cam shaft 6, It is possible to interlock the operation of sandwiching and transporting the material A and the operation of pressure processing, and further utilizing the pressure unit 3 as a detent for the material A,
By changing the shapes of the lower mold 1 and the upper mold 2, various types of pressure processing as shown in FIG. 16 can be performed.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 9 is a perspective view of the essential parts showing the structure of the material feeding device according to this embodiment. Two material feeding mechanism parts 5a and 5b of the same device as described in the first embodiment are arranged adjacent to each other, and an opening / closing gripper is provided. The die 32 for punching out the material A is attached to the chuck attachment surface 31 of 10, and the U-shaped spring chuck 33 and the punch 34 are attached to the chuck attachment surface 30 of the opening / closing gripper 11, respectively. The shafts 12 are configured to be the same shaft.

The operation of the present embodiment thus constructed will be described below. First, when the U-shaped spring chuck 33 moves from the opened state to the closed state as shown in FIG. 11, the U-shaped spring chuck 33 first holds the material A, and then the punch 34. And die 32 in Figure 1
The material A is punched out as shown in FIG.

FIG. 12 is a timing chart showing the operation of the apparatus. As shown in FIG. 12, the cam shaft 6 (not shown) is provided.
During the rotation of 0 ° to 180 °, the material feeding mechanism 5 of FIG.
a performs a punching operation while feeding the material feeding X1 and the punching press Y1, and then while performing the same 180 ° to 360 ° rotation, the material feeding mechanism 5b of FIG. 9 punches while feeding the material feeding X2 and the punching press Y2. That is, the machining is continuously performed with the timing shifted so that the pressure machining can be continuously performed twice without stopping the material feeding operation while the camshaft 6 makes one rotation. Is.

[0025]

As described above, in the material feeding device according to the present invention, a pair of open / close grippers holding the material by a U-shaped spring chuck having a spring property slides a certain amount to feed the material at a fixed size. It is possible to perform a highly accurate feeding operation by freely interlocking the combined operation of sandwiching and holding and feeding, and it is possible to stably feed even if the material is a soft resin or a thin wire material.

Further, by connecting the pressure processing unit portions, not only it becomes possible to perform a large number of pressure processing with an extremely compact device, but also the feeding operation and the pressure processing operation of the same operation amount are performed by the camshaft. There is no time loss because it can be done continuously during one rotation, compared to the conventional device
Higher productivity can be ensured by doubling the speed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external shape of a material feeding device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the internal structure of the same.

FIG. 3 is a perspective view of a main part showing a configuration of the same main part.

FIG. 4 is a perspective view showing a half-moon cell according to the embodiment.

FIG. 5 is a partial perspective view showing a part of the opening / closing gripper according to the embodiment.

FIG. 6 is a schematic front view showing a closed state of the opening / closing gripper according to the embodiment.

FIG. 7 is a schematic front view showing a state in which the opening / closing gripper is opened.

FIG. 8 is a schematic front view illustrating the operation of the half-moon cell according to the embodiment.

FIG. 9 is a perspective view of a main part showing a main part of a material feeding device according to a second embodiment of the present invention.

FIG. 10 is a side view of an essential part for explaining the operation according to the embodiment.

FIG. 11 is a partial cross-sectional side view of a main part for explaining the operation according to the embodiment.

FIG. 12 is a timing diagram illustrating an operation according to the embodiment.

FIG. 13 is a perspective view of a main part of a conventional material feeding device.

FIG. 14 is a schematic front view showing a material feeding device connected with a conventional press machine.

FIG. 15 is a timing diagram illustrating the operation of FIG.

FIG. 16 is a perspective view showing types and contents of pressure processing.

[Explanation of symbols]

 1 Lower mold 2 Upper mold 3 Pressurizing unit 4 Retaining ring 5, 5a, 5b Material feeding mechanism 6 Cam shaft 7 Drive 8 Lower chuck 9 U-shaped spring chuck 10, 11 Opening / closing gripper 12 Gripper opening / closing shaft 13 Half-moon cell 14 Spring 15 Shaft hole 16 Connection lever 16a Roller 17 Slide shaft 18 Opening / closing cam 19 Roller 20 Feed cam 21 Semicircular surface part 22,23 Flat surface part 24 Half moon cell 26 Shaft core 28 Pressure cam 29 Swing lever 30,31 Chuck mounting surface 32 Die 33 U-shaped spring chuck 34 Punch 40 Shaft 41 Corner portion 42 Sliding cell 60 Semicircular surface portion A Material

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Matsuo Nishioka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A pair of opening / closing grippers fitted to a slide shaft so as to be openable / closable and axially slidable so as to hold a material by attaching a U-shaped spring chuck having a spring property to at least one tip. A sliding cell that is fitted into the slide shaft and slides the pair of open / close grippers in the axial direction; and a cam shaft that is provided with a cam that drives the pair of open / close grippers and the slide cell, and that is connected to a drive unit. A material feeding device comprising a gripper opening / closing shaft that opens / closes the pair of opening / closing grippers via a semicircular cell having a semicircular cross section that is closely driven by the cam provided on the cam shaft. 2. A camshaft is provided with a drive shaft for driving the upper die, in which a pressure unit portion consisting of a fixed lower die and an upper die which can be raised and lowered is connected to the front side of the material feeding mechanism in the feeding direction. The material feeding device according to claim 1, which has the same axis as that of 3. A U-shaped spring chuck and a punch for pressure-working a material are attached to one tip of the pair of opening and closing grippers, and a die combined with the punch is attached to the other tip. The described material feeding device. 4. A plurality of sets of material feeding mechanisms are continuously arranged in the material feeding direction, and the plurality of sets of material feeding mechanisms operate independently at different timings during one rotation of the camshaft. The material feeding device according to claim 1, wherein