JPH0321785Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an arbor holder 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 coil springs such as conical or barrel-shaped), cutting mechanisms, and pitching mechanisms (when forming compression springs, etc.) are the same during the manufacturing of coil springs. They are synchronized and interlocked from the drive source.

[The problem that the idea aims to solve]

However, in the above-mentioned coil spring manufacturing apparatus, when manufacturing a coil spring, the winding diameter, wire diameter,
Pitch etc. naturally differ, but adjusting the various mechanisms according to the dimensions and types of these springs each time tends to cause variations in product accuracy, and furthermore, it is difficult to adjust each mechanism itself. And that takes a long time. In particular, in coil spring manufacturing equipment, the number of pieces manufactured per unit time is large, and long adjustment times reduce the operating rate of the equipment.
Makes spring manufacturing inefficient.

Therefore, in order to solve these problems,
The applicant has devised a tool cassette that incorporates non-adjustable parts into the main body of the device, minimizes the number of component parts by combining only the various tools that require adjustment, and reduces the overall weight and manufacturing cost of parts. By preparing this tool cassette for each coil spring size, type, etc., if there is a change in the coil spring to be manufactured, the tool cassette can be replaced to make coil spring products uniform and improve production efficiency. We are proposing a spring manufacturing device.

Specifically, this coil spring manufacturing apparatus is characterized in that the coiling tool of the coiling mechanism and the pitching tool of the pitching mechanism are mounted in one cassette that can be removably attached to the main body of the apparatus. This coil spring manufacturing apparatus will be explained below with reference to FIGS. 1, 2, and 3.

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 device 1
In addition to the tool cassette 3, the apparatus includes a 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. The coil spring wire W is sent to the tool cassette 3 by the wire feeding mechanism 5, and is 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.

The tool cassette 3 is shown in detail in FIGS. 2 and 3. 7 is a base of this cassette 3, and guide plates 8, 8 are arranged in parallel on the upper and lower sides of this base 7. 9
The connecting bolt 10 is inserted into the cassette mounting portion of the main body 2 of the apparatus and fixed thereto by means of a connecting bolt 10 passed through the daruma-shaped hole 9a.
The larger hole of the Daruma-shaped hole 9a of the mounting plate 9 and the connecting bolt insertion holes of the guide plate 8 and base 7 are all larger than the head of the connecting bolt 10, so the tool cassette 3 can be installed and removed using the connecting bolt 10. This can be done without removing the device main body 2. Before the guide plates 8, 8 are fastened with the connecting bolts 10, the slide main body 11 is fitted into the groove between the base 7 and the guide plates 8, 8, and the slide body 11 is inserted into the groove between the base 7 and the guide plates 8, 8. It is adjustable. Adjustment of the slide body 11 in the left-right direction is possible because the tip of the stop screw 12 (see Figure 2) screwed into the device body 2 is in contact with the left end of the slide body 11 in the drawing.
This is done by adjusting the screwing amount of the stop screw 12.

In front of the slide body 11, a block holder 13 is disposed between both guide plates 8, 8, and a connecting pin 14 holds the slide body 11.
However, as will be described later, it is slightly rotatable around the connecting pin 14. The block holder 13 has a U-shape that opens toward the wire feeding mechanism 5, and a coiling pin holder 16 in which the coiling pin 15 is integrally fastened with, for example, a countersunk bolt is accommodated in this opening. By appropriately adjusting the two machine screws of the coiling pin holder 16, the coiling pin 15 can be tilted or tilted in a direction perpendicular to the mounting surface of the tool cassette 3 to the device main body 2, that is, in the direction toward the front or back of the device main body 2. Parallel movement can be adjusted.
Further, at both upper and lower corners of the coiling pin 15 side end of the slide body 11, protrusions 1 protruding toward the front side are provided.
7, 17 are provided, and these protrusions 17, 1
7, coiling pin vertical movement adjustment screws 18, 18 screwed in the vertical direction hold the coiling pin holder 16 at their tips. By adjusting the screwing amount of the adjusting screws 18, 18, the position of the coiling pin 15 can be adjusted around the connecting pin 14 in the vertical movement direction.

At the side end of the coiling pin 15 of the base 7,
Furthermore, an arbor holder mounting plate 19 is fixed with screws. This arbor holder mounting plate 19 has
An arbor 20 and a wire guide 21, which together with the coiling pin 15 constitute a coiling mechanism, are fixedly provided. Also, this arbor holder mounting plate 1
9, a block guide 22 and a pitch tool 23 constituting a pitch mechanism are attached. An arbor holder 24 that holds the arbor 20 is attached to the back surface of the arbor holder mounting plate 19, and a pitch tool shaft 25 for driving the pitch tool 23 passes through it.
is movable together with the pitch tool shaft 25 in the penetrating direction of the mounting plate 19. When the tool cassette 3 is attached to the device main body 2, the arbor holder 24
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,
The loading of the tool cassette 3 into the main body 2 of the apparatus is completed, and the structure regarding the holding bolt 26 will be described in detail later.

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
If necessary, you can make fine adjustments according to the above adjustment method. With this configuration, the replacement work of the tool cassette 3 is extremely 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 shaped into a conical shape, barrel shape, etc. in which the coil winding diameter changes. It is also possible to produce deformed coil springs.

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 then assembled into a cassette.Therefore, there is little opportunity for dimensional errors to occur, and there is usually no need to worry about dimensional errors after the fact. Because 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 precision can be easily obtained without requiring advanced technology for fine adjustment. However, the arbor holder 24 is attached to the device main body 2.
The structure to be attached to is constructed as follows. That is, as shown in FIG.
is provided so as to intersect with a part of the arbor holder 24. The presser pipe 27 is inserted into the presser pipe insertion hole 28 , and the inner end thereof is configured to abut against the outer peripheral surface of the arbor holder 24 partially exposed in the presser pipe insertion hole 28 . Presser pipe 27
Insert the arbor holder holding bolt 26 into the inside,
The retainer nut 29 is configured to be screwed into a threaded portion provided at the inner end thereof.

When attaching the arbor holder 24 to the device main body 2, after inserting the arbor holder 24 into the device main body 2 from the front of the device, rotate the head of the holding bolt 26 protruding outside the device main body 2 using a special spanner. Accordingly, the arbor holder 24 can be clamped and fixed by the presser pipe 27 and the presser nut 29. Further, when removing the arbor holder 24, the arbor holder 24 can be removed by rotating the holding bolt 26 in the opposite direction and loosening the clamp of the holding pipe 27 and the holding nut 29 against the arbor holder 24.

However, in this mounting structure of the arbor holder 24, a special spanner is required to rotate the presser bolt 26, and a tool cassette is required each time the shape and dimensions of the coil spring to be manufactured change. 3, the cumulative working time required for loosening and tightening the presser bolts 26 becomes longer, and as a result, the operating efficiency of the coil spring manufacturing apparatus decreases, which is not a desirable thing.

The purpose of this invention is to solve the above problems, and the various tools used in the manufacture of coil springs, including the arbor, are mounted on one tool cassette that is removably attached to the main body of the device, and a dedicated spanner is installed. A coil spring manufacturing device capable of quickly and accurately attaching or detaching an arbor holder to a device body, and in some cases automatically, by using the fluid pressure of a fluid pressure cylinder without using a An object of the present invention is to provide an arbor holder mounting structure.

[Means to solve the problem]

In order to achieve the above object, this invention is constructed as follows. That is, this invention includes a tool cassette that is removably attached to the main body of the device,
An arbor holder mounting plate attached to the tool cassette, an arbor holder that holds the arbor attached to the arbor holder mounting plate, a holding pipe that is inserted into a pipe insertion hole formed in the device main body so as to intersect with the arbor holder, and a holding pipe that is inserted into the holding pipe. An arbor holder holding bolt for inserting and fixing the arbor holder, a holding nut for screwing into the arbor holder holding bolt and clamping the arbor holder, a pinion formed on the bolt head of the arbor holder holding bolt, and a pinion for engaging the pinion. The present invention relates to an arbor holder mounting structure for a coil spring manufacturing device having a rack that is coupled to a hydraulic cylinder fixed to the main body of the device.

[Effect]

Since the arbor holder 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 the arbor holder mounting structure of this coil spring manufacturing device, if there is a change in the shape or dimensions of the coil spring to be manufactured, the operation of the fluid pressure cylinder fixed to the device body can be changed to allow the coil spring to be mounted on the fluid pressure cylinder. When the rack is moved, a pinion formed on the bolt head of the arbor holder holding bolt and engaged with the rack rotates, allowing the arbor holder to be loosened and removed from the apparatus body.

In addition, after removing the tool cassette containing the arbor holder from the machine body, to install a new tool cassette that matches the manufacturing of the changed coil spring, the procedure can be reversed, and the new cassette can be loaded into the machine body. After that, when the hydraulic cylinder is returned to the tightening operation, the arbor holder holding bolt can tighten the arbor holder via the rack and pinion mechanism.

Further, since the fluid pressure cylinder can be automatically operated by a solenoid valve with a single button operation, the work of tightening and loosening, that is, releasing, the arbor holder mounting bolt can be done in one operation.

〔Example〕

Hereinafter, with reference to FIG. 5, one embodiment of the arbor holder mounting structure of the coil spring manufacturing apparatus according to this invention will be described in detail.

The tool cassette and its arbor holder in the coil spring manufacturing apparatus have the same structure as the one proposed by the present applicant and described above, so a description thereof will be omitted here.

In the arbor holder mounting structure for a coil spring manufacturing apparatus according to this invention, a fluid pressure cylinder 30 is fixed on the main body 2 of the apparatus, and a rack 31 is integrally formed on a piston rod 30a of the fluid pressure cylinder 30. The rack 31 is slidably guided by a rack guide 33 fixed on the main body 2 of the apparatus. A rack tooth 31 is provided on one side of the rack 31.
a is formed, and a pinion 32 formed at the head of the arbor holder holding bolt 26 engages with this rack tooth 31a.

The details of the fluid pressure cylinder 30 may be any known type, and fluid pressure can be supplied to and discharged from the cylinder with a single touch using a solenoid valve (not shown). Furthermore, even if this fluid pressure cylinder is a positive type that performs fastening by supplying fluid pressure, it is also a negative type that performs fastening using a built-in spring force when fluid pressure is removed. It may be hot.

Now, in FIG. 5, when the arbor holder presser bolt 26 is in the slack position at the position where the fluid pressure cylinder 30 (assumed to be a positive type) has pushed out the piston rod 30a, the arbor holder 24 can be removed or loaded into the device body 2. be. When the arbor holder 24 to be attached is already loaded, the fluid pressure cylinder 30 is opened by switching a solenoid valve (not shown).
operates in the direction to retract the piston rod 30a,
The arbor holder presser bolt 26 is rotated in the direction of tightening it. The fastening of the arbor holder using the arbor holder presser bolt 26 is the same as that shown in FIG. 4, and is omitted here. Moreover, when removing the arbor holder 24 from the apparatus main body 2, the above procedure may be performed in reverse.

[Effect of idea]

Since the arbor holder mounting structure of the coil spring manufacturing apparatus according to this invention is configured as described above, it has the following effects.

That is, according to this invention, the arbor holder retainer bolt that fixes the arbor holder to the main body of the device can be tightened or loosened with one touch by the fluid pressure operation of the fluid pressure cylinder based on the valve operation.
It is no longer necessary to manually screw in and unscrew the arbor holder holding bolt using a dedicated spanner, and as a result, the time required for mounting and replacing the arbor holder and therefore the tool cassette can be significantly shortened. Therefore, the operating efficiency of the coil spring manufacturing apparatus can be greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a coil spring manufacturing apparatus showing how a tool cassette is attached to the apparatus body to which the arbor holder 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 attached to the apparatus body of Fig. 1. FIG. 3 is a detailed perspective view of the tool cassette shown in FIG. 1, FIG. 4 is a sectional view showing the attachment part of the arbor holder, and FIG. 5 is the arbor holder of the coil spring manufacturing apparatus according to this invention. FIG. 2 is a perspective view showing an example of a mounting structure. 1... Coil spring manufacturing device, 2... Device main body,
3...Tool cassette, 20...Arbor, 24...
... Arbor holder, 26... Arbor holder holding bolt, 27... Holding pipe, 29... Holding nut,
30...Fluid pressure cylinder, 31...Rack, 32
...Pinion, 33...Rack guide.

Claims (1)

[Scope of utility model registration request] A tool cassette removably attached to the device body, an arbor holder mounting plate attached to the tool cassette, an arbor holder that holds the arbor attached to the arbor holder mounting plate, and a pipe insertion formed in the device body to intersect with the arbor holder. A retainer pipe inserted into the hole, an arbor holder retainer bolt inserted into the retainer pipe and for fixing the arbor holder, a retainer nut that screws into the arbor holder retainer bolt to clamp the arbor holder, and a bolt head of the arbor holder retainer bolt. An arbor holder mounting structure for a coil spring manufacturing device, comprising a pinion formed in the section, and a rack engaged with the pinion and attached to a fluid pressure cylinder fixed to the device main body.