JPH0321784Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a tool cassette mounting structure for a coil spring manufacturing apparatus that manufactures a coil spring by bending and cutting a wire fed from a wire feeding mechanism.

[Conventional technology]

In general, a coil spring manufacturing device is, for example, as disclosed in Japanese Utility Model Publication No. 53-42583,
The wire for coil springs is wound on a reel stand and straightened into a straight line by a strainer before being sent.The wire rod is then bent to a certain curvature to form a coil spring, and the wire is straightened by a strainer before being fed. It consists of a wire feeding mechanism, a coiling mechanism that bends the wire to a certain curvature, a cutting mechanism that cuts the coil, and a pitching mechanism that pitches the coil spring. Normally, these wire feeding mechanisms, coiling mechanisms (when manufacturing deformed springs such as conical or barrel-shaped springs), cutting mechanisms, and pitching mechanisms (when forming compression springs, etc.) are driven by the same drive source during the manufacturing of coil springs. They are synchronized and linked.

[The problem that the idea attempts to solve]

However, in the above-mentioned coil spring manufacturing apparatus, when manufacturing a coil spring, the winding diameter, wire diameter, pitch, etc. of the coil spring naturally vary depending on the characteristics that the coil spring should have. Adjusting various mechanisms to match the dimensions of these coil springs each time tends to cause variations in product accuracy, and furthermore, adjusting each mechanism itself is difficult and takes a long time. In particular, in a coil spring manufacturing apparatus, a large number of coil springs are manufactured per unit time, and a long adjustment time makes the operation of the apparatus inefficient.

In order to solve these problems, the applicant has incorporated the non-adjustable parts into the main body of the device, combined only the various tools that require adjustment, and minimized the number of component parts to reduce the overall weight and manufacturing cost of parts. By devising a tool cassette based on the size of the coil spring and preparing this tool cassette for each coil spring size,
We are proposing a coil spring manufacturing device that can uniformize coil spring products and improve production efficiency by changing the tool cassette when there is a change in the coil spring being manufactured. Specifically, this coil spring manufacturing device is characterized in that a coiling tool of a coiling mechanism and a pitching tool of a pitching mechanism are mounted in one cassette that can be removably attached to the main body of the device, see the figure below. Let me explain this.

FIG. 1 shows a coil spring manufacturing apparatus 1 equipped with a tool cassette 3 unitized according to the above proposal. This coil spring manufacturing apparatus 1 includes, in addition to a tool cassette 3, an apparatus main body 2, a strainer 4, and a wire feeding mechanism 5. The coil spring wire W wound on a reel stand (not shown) is sent to the wire feeding mechanism 5 while its distortion is corrected by the strainer 4. Wire rod W for coil springs
is sent to the tool cassette 3 by the wire feeding mechanism 5 and formed into a coil having desired dimensions. As shown in FIGS. 1 and 2, the tool cassette 3 is attached to the upper part of the apparatus main body 2 so as to match with the outlet of the feed roller 6 of the line feeding mechanism 5.

This tool cassette 3 is shown in detail in FIGS. 2 and 3. Guide plates 8, 8 are arranged in parallel on the upper and lower sides of the base 7 of the tool cassette 3.
is fitted into and fixed to the cassette mounting portion of the apparatus body 1 via the mounting plates 9, 9 with a connecting bolt 10, which will be described in detail later. Connection bolt 1
0, the slide body 11 is fitted into the groove between the base 7 and the guide plates 8, 8, and is freely adjustable in the left and right direction, that is, in the horizontal direction when looking at the line feeding mechanism 5. It is becoming. Adjustment of the slide body 11 in the left and right direction is as follows:
Since the tip of the stop screw 12 screwed into the coil spring manufacturing apparatus main body 1 is in contact with the left end of the slide main body 11 in the drawing, this is done by adjusting the screwing amount of the stop screw 12. Further, in front of the slide body 11, a block holder 13 is arranged between both guide plates 8, 8, and is tightened to the slide body 11 by a connecting pin 14. It is slightly rotatable around the pin 14. The block holder 13 has a U-shape that opens toward the wire feeding mechanism 5, and a coiling pin 1 is inserted into this opening.
A coiling pin holder 16 is housed in which the coiling pin holder 16 is integrally tightened with, for example, a countersunk bolt. By adjusting the two machine screws of the coiling pin holder 16 as appropriate, the coiling pin 15 can be tilted or tilted in the direction perpendicular to the mounting surface of the tool cassette 3 to the device body 1, that is, in the direction toward the front or back of the device body 1. Parallel movement can be adjusted. Furthermore, protrusions 17, 17 protruding toward the front are provided at both upper and lower corners of the side end of the coiling pin 15 of the slide body 11, and the coiling pin is screwed into the protrusions 17, 17 in the vertical direction. The vertical adjustment screws 18, 18 abut and hold the coiling pin holder 16 at their tips. By adjusting the screwing amount of these coiling pin vertical movement adjusting screws 18, 18, the coiling pin 1
5 can be adjusted in position around the connecting pin 14 in the vertical movement direction.

An arbor holder mounting plate 19 is further fixed to the side end of the coiling pin 15 of the base 7 with screws, and an arbor 20 and a wire guide 21 that constitute a coiling mechanism together with the coiling pin 15 are mounted on this arbor holder mounting plate 19. Fixedly installed. In addition, this arbor holder mounting plate 19
A block guide 22 and a pitch tool 23 forming a pitch mechanism are attached to the block guide 22 and a pitch tool 23 that constitutes a pitch mechanism. An arbor holder 24 for holding an arbor 20 is attached to the back of the arbor holder mounting plate 19, and a pitch tool shaft 2 for driving a pitch tool 23 is attached.
5 passes through, and the pitch tool 23 is attached to the arbor holder mounting plate 19 together with this pitch tool shaft 25.
It is movable in the penetrating direction. Tool cassette 3
When attached to the device body 2, the arbor holder 2
4 is inserted into the device main body 2 at the same time as the base 7, so if the holding bolt 26 for the arbor holder 24 is screwed in and fixed from the outside of the device main body 2, and the pitch tool shaft 25 is set at a predetermined timing,
This completes the loading of the tool cassette 3 into the main body 2 of the device.

As already mentioned, these adjustments are usually made in advance according to the various dimensions of the coil spring before the tool cassette 3 is installed, and a large number of such adjusted tool cassettes 3 are prepared and manufactured. One tool cassette 3 according to the coil spring to be
Select and, if necessary, make fine adjustments according to the adjustment method above. By doing so, the replacement work of the tool cassette 3 is simplified and the replacement work time is also significantly shortened.

Although the coiling pin 15 has been described as being immovable during coil spring manufacturing, if the coiling mechanism is configured so that it can move left and right in synchronization with other tools, it can be used to create a conical or barrel-shaped coil in which the coil winding diameter changes. Deformed springs can be manufactured.

In coil spring manufacturing equipment that uses such tool cassettes, the tools including the parts that require adjustment are adjusted in advance for each coil spring product to be manufactured and are placed in the cassette.Therefore, there is little chance of dimensional errors occurring, and there is usually no need to worry about dimensional errors after the fact. Since there is no need to make adjustments, the replacement work time is significantly shortened, and even in the unlikely event that the dimensions do not match, good accuracy can be easily obtained without requiring advanced technology for fine adjustment. However, the structure for attaching the tool cassette 3 to the device main body 1 is as shown in FIG. While being held down by the mounting plates 9, 9, the connecting bolt 10 is passed through the bolt hole 9a of the mounting plate 9, 9 through the washer 29, and the through hole 28 of the base 7 and the guide plate 8, 8 into the screw hole 27.
It has a structure that screws into the Since the through hole 28 is larger than the head of the connecting bolt 10,
The base 7 and guide plates 8, 8 of the tool cassette 3 can be removed from the device main body 2 without completely removing the connecting bolts 10.

However, when installing the tool cassette 3 to the device main body 2, which allows the coiling tool and pitch tool 23 to be attached to the device main body 2, it is necessary to connect the already installed tool cassette 3 using a special spanner. It is necessary to loosen and remove the bolt 10, install a new tool cassette 3, and then screw in the connecting bolt 10, and it is recommended that the tool cassette 3 be replaced every time the shape and dimensions of the coil spring to be manufactured change. Taking this into consideration, it is not desirable in terms of operational efficiency of the coil spring manufacturing apparatus to take a long time to tighten the bolts.

The purpose of this invention is to solve the above problems, by mounting the coiling tool of the coiling mechanism and the pitching tool of the pitching mechanism in a coil spring manufacturing device in one tool cassette that can be removably attached to the device body. A tool cassette mounting structure for a coil spring manufacturing device is provided, in which the tool cassette can be quickly and reliably mounted and removed from the device main body 2 by using fluid pressure of a fluid pressure cylinder without using a dedicated spanner. It is to provide.

[Means to solve the problem]

In order to achieve the above object, this invention is constructed as follows. That is, this invention provides a tool cassette including a base on which a coiling tool of a coiling mechanism and a pitching tool of a pitch mechanism are mounted, a device main body provided with a mounting surface for mounting the base of the tool cassette, and a device main body equipped with a mounting surface for mounting the base of the tool cassette. A fluid pressure cylinder installed with one end attached to the back side of the mounting surface, passing through a hole formed in the base and a hole formed in the device body, and one end attached to the other end side of the fluid pressure cylinder. a connecting bolt, and a mounting plate for locking the other end of the connecting bolt to the base of the tool cassette;
The present invention relates to a tool cassette mounting structure for a coil spring manufacturing device.

In the tool cassette mounting structure of this coil spring manufacturing device, the connecting bolt engaged with one end of the fluid pressure cylinder is attached to a central hole formed in the fluid pressure cylinder, the hole in the device body, and the tool cassette. The connecting bolt is made to pass through the hole and protrude to the surface side of the tool cassette, and the protruding end of the connecting bolt is locked to the tool cassette by the mounting plate.

Furthermore, in this tool cassette mounting structure of the coil spring manufacturing device, the size of the head of the connection bolt is smaller than the size of the hole in the base and the hole in the device body, and The size is intermediate between the size of the hole at one end of the elongated hole and the size of the hole at the other end.

Note that the fluid pressure cylinder may be of a positive type or may be of a negative type that loosens the connecting bolt by canceling out the spring force having a strong pressing force with the pressurizing force of the fluid pressure cylinder. Of course.

[Effect]

Since the tool cassette mounting structure of the coil spring manufacturing apparatus according to this invention is constructed as described above, it has the following effects. That is, in this tool cassette mounting structure, a fluid pressure cylinder is provided with one end attached to the back side of the mounting surface of the device main body, and a fluid pressure cylinder is provided that passes through a hole formed in the base of the tool cassette and a hole formed in the device main body. The fluid pressure cylinder has a connecting bolt having one end attached to the other end thereof, and a mounting plate for locking the other end of the connecting bolt to the base of the tool cassette. Pressure can be converted into a pressing force for the tool cassette through the connection bolt, and the tool cassette can be fixed to the device body simply by operating the fluid pressure cylinder.

That is, if there is a change in the shape or dimensions of the coil spring to be manufactured, the tool cassette can be attached to the main body of the device via the connecting bolt by switching the operation of the fluid pressure cylinder attached to the back side of the tool cassette mounting surface. It becomes possible to loosen the pressing force and remove the tool cassette from the main body of the device. In addition, to install a new tool cassette, simply follow the reverse procedure. After loading the new cassette into the device body, return the fluid pressure cylinder to fastening operation, and then attach the tool cassette to the device body via the connecting bolt. It gives you the power to press down on the front. Moreover, the fluid pressure cylinder can be activated with a single button operation using an electromagnetic valve.
Tightening and loosening of the connecting bolts can be done in one step.

〔Example〕

Hereinafter, with reference to FIG. 5, an embodiment of the tool cassette mounting structure of the coil spring manufacturing apparatus according to this invention will be described in detail. In the coil spring manufacturing apparatus 1, a tool cassette 3 attached to the apparatus main body 2
The tool cassette 3 attached to the main body 2 of the coil spring manufacturing apparatus 1 will not be described here because it has the same structure as the one proposed by the present applicant and described above. In the tool cassette mounting structure of the coil spring manufacturing apparatus according to this invention, a fluid pressure cylinder 30 is mounted on the back side of the tool cassette mounting surface of the apparatus main body 2.
is attached at one end by a cylinder mounting bolt 34. A central hole 31 is provided in the center of the fluid pressure cylinder 30, and a connecting bolt 1, which will be described later, can be inserted into the central hole 31.
0 is passing through. The rear end of the connecting bolt 10 is screwed into a nut 33, and this nut 33 is connected to a hydraulic cylinder 30 such as hydraulic pressure via a spacer 32.
attached to the other end. Fluid pressure cylinder 30
The pressing force is converted into a pressing force of the tool cassette 3 via the connecting bolt 10.

The details of the fluid pressure cylinder 30 may be any suitable hydraulic cylinder, and fluid pressure such as oil pressure is supplied to and discharged from the cylinder with a single touch using an electromagnetic valve (not shown). Furthermore, the fluid pressure cylinder 30 is
Even if there is a positive type in which the cylinder length is extended by the supply of fluid pressure and the connection is made, there is a negative type in which the cylinder length is extended by the built-in spring force to perform the connection as fluid pressure is removed. It can be something.

The through hole 27a of the device main body 2, the base 7 of the tool cassette 3 loaded on the front surface of the device main body 2, and the through hole 28 of the guide plate 8 communicate with each other with a common axis.
The connecting bolt 10 is configured to be able to pass through the connecting bolt 10. Furthermore, the size of the through hole 28 is determined by the size of the connecting bolt 10.
It is made large enough for the head of the person to pass through.

A mounting plate 9 having an L-shaped cross section (FIG. 3) is mounted so as to cover the guide plate 8 similarly to the one shown in FIG. Washer 2 even on the head of
The mounting plate 9 can be pressed against the device main body 2 side via the mounting plate 9. The smaller hole of the elongated hole 9a is smaller than the head of the connecting bolt 10, but the larger hole of the elongated hole is larger than the head of the connecting bolt 10,
Passable. That is, in this tool cassette mounting structure of the coil spring manufacturing device, the size of the head of the connecting bolt 10 is smaller than the size of the hole 28 in the base 7 and the hole 27a in the device main body 2, and The size is intermediate between the size of the hole on one end side of the long hole 9a and the size of the hole on the other end side.

By the way, if the fluid pressure cylinder 30 (positive type) is at the return position shown by the two-dot chain line in FIG. pressure cylinder 30
When fluid pressure is supplied by operating a solenoid valve (not shown), the fluid pressure cylinder 30 operates in the direction of arrow A and reaches the solid line position (positions B and C move to positions D and E, respectively). The connecting bolt 10, which has been moved to the smaller hole of the elongated hole 9a by sliding the mounting plate 9, also moves in the direction of arrow A via the spacer 32 and nut 33, so that the bolt head is moved between the washer 29 and the mounting plate 9. The base 7 and the guide plate 8 are pressed against the front surface of the apparatus main body 2 and fixed thereto. In addition, when removing the tool cassette 3 from the main body 2 of the device, the above operation can be performed in reverse. However, when the fluid pressure is discharged from the fluid pressure cylinder 30 by operating the electromagnetic valve, the fluid pressure cylinder 30 moves to the solid line position (D , E), return to the two-dot chain line position (B, C) and loosen the fastening force of the connecting bolt 10. At this time, if the mounting plate 9 is slid and the hole through which the connecting bolt 10 passes is moved from the smaller hole of the elongated hole 9a to the larger hole, the larger hole of the elongated hole 9a, the base 7, and the guide Through hole 2 in plate 8
Since the size of the bolt 7a is larger than the head of the bolt 10, the tool cassette 3 can be removed from the device main body 2 without removing the connecting bolt 10 from the device main body 2.

[Effects of the invention] Since the tool cassette mounting structure of the coil spring manufacturing apparatus according to this invention is constructed as described above, it has the following effects. That is, according to this invention, the connecting bolt that attaches the tool cassette to the main body of the device can be tightened and released by the fluid pressure operation of the fluid pressure cylinder based on the valve operation, so that the connection bolt that attaches the tool cassette to the main body of the device can be tightened and released by the fluid pressure operation of the fluid pressure cylinder based on the valve operation. No need to screw in or unscrew bolts,
As a result, the time required for mounting and replacing the tool cassette can be shortened. Therefore, the operational efficiency, that is, the operating rate of the coil spring manufacturing apparatus can be improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a coil spring manufacturing apparatus showing how the tool cassette is attached to the main body of the apparatus to which the tool cassette mounting structure of the coil spring manufacturing apparatus according to this invention is applied, and Fig. 2 is a perspective view of the coil spring manufacturing apparatus shown in Fig. 1. FIG. 3 is a front view showing the tool cassette attached to the main body of the spring manufacturing device, FIG. 3 is a perspective view showing details of the tool cassette in the coil spring manufacturing device of FIG. 1, and FIG. 4 is FIG. 1 and FIG. 3. FIG. 5 is a cross-sectional view of the tool cassette mounting structure shown in FIG. 1... Coil spring manufacturing device, 2... Device main body,
3... Tool cassette, 7... Base, 8... Guide plate, 9... Mounting plate, 9a... Long hole, 1
0... Connection bolt, 23... Pitch tool, 27
a, 28...Through hole, 29...Washer, 30...Fluid pressure cylinder, 31...Center hole, 32...Spacer, 33...Nut.

Claims (1)

[Claims for Utility Model Registration] (1) A tool cassette equipped with a base on which a coiling tool of a coiling mechanism and a pitching tool of a pitching mechanism are mounted, and a device body equipped with a mounting surface for mounting the base of the tool cassette. , a fluid pressure cylinder disposed with one end attached to the back side of the mounting surface of the device main body, the other end of the fluid pressure cylinder passing through a hole formed in the base and a hole formed in the device main body; A tool cassette mounting structure for a coil spring manufacturing apparatus, comprising: a connecting bolt having one end attached to the connecting bolt; and a mounting plate for locking the other end of the connecting bolt to the base of the tool cassette. (2) The connection bolt engaged with one end of the fluid pressure cylinder is passed through a central hole formed in the fluid pressure cylinder, the hole in the device main body, and the hole in the tool cassette, and the connection bolt is inserted into the surface of the tool cassette. 2. The tool cassette mounting structure for a coil spring manufacturing apparatus according to claim 1, wherein the end of the connecting bolt is made to protrude to the side and is locked to the tool cassette by the mounting plate. (3) The size of the head of the connecting bolt is smaller than the size of the hole in the base and the hole in the main body of the device, and the size of the hole at one end of the long hole formed in the mounting plate. 2. The tool cassette mounting structure for a coil spring manufacturing apparatus according to claim 1, wherein the tool cassette mounting structure has a size intermediate between the sizes of the holes on the end side.