JPH0321786Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a pitch mechanism 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, coil spring manufacturing equipment bends a coil spring wire rod to a certain curvature to make a coil spring, which is wound on a reel stand and straightened into a straight line by a strainer. The coiling mechanism consists of a wire feeding mechanism that feeds the wire straightened into a straight line, 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 molding compression springs, etc.) are used during the manufacturing of coil springs.
They are synchronized and interlocked from the same drive source. When manufacturing coil springs, the winding diameter, wire diameter, pitch, etc. of the spring naturally vary depending on the characteristics the spring should have, but various mechanisms are adjusted each time according to the various dimensions of the spring. This tends to cause variations in accuracy, and furthermore, adjustment of 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 reduces the operating rate of the apparatus and makes manufacturing inefficient.

In order to eliminate such troubles, a coil spring manufacturing apparatus has been disclosed, for example, as described in Japanese Utility Model Publication No. 53-42583. This coil spring manufacturing equipment has several units with wire diameters, winding diameters, pitches, etc. set in advance so that springs of different shapes and dimensions can be formed, and the unit can be selected as needed. When molding springs of different shapes and dimensions, all you have to do is attach and detach the pre-adjusted unit, and stop the operation of the device as well. Because it only needs to be done when replacing the coil spring, the amount of time the device will be stopped due to a change in coil spring specifications is reduced, the time spent on adjustments is shortened, and there is no variation in products due to adjustment errors. However, the specifically disclosed coil spring manufacturing apparatus is
As shown in the figure, it is constructed as follows.

That is, in the coil spring manufacturing apparatus shown in FIG. 5, an arbor 103 for forming a coil spring is erected on one base 102 facing toward the front.
Above the arbor 103, a coiling pin 104 that allows a desired angle to be selected with respect to the arbor 103 is mounted on a pin angle adjustment table 105, and the pin angle adjustment table 105 is connected to the base 103.
It is mounted on a slide plate 106 that is guided by a slide plate guide 107 on 2 and slid by an operating lever 108 on a lever 109 pivotally mounted on the main body of the device,
It constitutes a coiling pin device 127. In addition, on both left and right sides of the arbor 103, horizontal sliders 115 are provided which slide in the direction of the arbor 103 guided by horizontal slider guides 116 on the base 102, and a cutter 114 is installed at the tip of the slider 115. The cutter device 126 is attached and detached freely. Further, below the arbor 103, a base 102 is provided.
A pair of feed rollers 121 are provided adjacent to each other at the front ends of two shafts that pass through the feed rollers 121 in the front and rear directions. Final wire guides 123 are attached above and below adjacent portions of the feed roller 121, and a wire feeding device 128 is provided with a pressure adjusting screw 122 that allows the finger contact pressure of the feed roller 121 to be adjusted. The base 102 supports these devices 126,1
It is a unit consisting of 27 and 128,
By attaching this unitized base 102 to the front of the device main body, the coiling pin device 1
The operating rod 108 on the lever rod 109 pivotally mounted on the device body on the sliding plate 106 of No. 27 is connected, and is further inserted into the groove recessed in the outer end of the horizontal sliding plate 115 of the cutter device 126, that is, in the horizontal sliding plate guide 116. , a roller 11 at the tip of a swinging rod 118 pivotally mounted on the main body of the device
7 is inserted, the cutter 114 slides in the direction of the arbor 103 by an appropriate movement from the movement mechanism, and
A roller provided at the end of a lever (not shown) pivotally mounted on the main body of the device comes into contact with the rear end of the pitch tool 111, and the pitch tool 111 is operated by the operation from the pitch adjustment device, and the line feeding device 128, so that a gear (not shown) attached to the rear end of the shaft of the feed roller 121 engages with a drive gear (not shown) installed in the main body of the apparatus to appropriately feed the wire W to the arbor 103. These are configured to operate in series.

In this coil spring manufacturing apparatus 101, when attaching the unit base 102 to the apparatus main body, the gear at the rear end of the shaft of the feed roller 121 is engaged with the drive gear installed in the apparatus main body, and the cutter 114 A swinging rod 1 equipped with a horizontal sliding plate 115 and a pitch tool 111 on the mounting main body.
The roller 117 on the coiling pin 18 and the roller on the lever are fitted into or in contact with each other, and the sliding plate 106 of the coiling pin 104 is also attached to the coil spring manufacturing apparatus 1 in the same manner as described above.
It is designed to be connected to the lever 109 on 01 via the operating lever 108.

Next, referring to FIG. 6, the pitch mechanism 130 used in the coil spring manufacturing apparatus will be explained.
The pitch mechanism 130 is necessary when manufacturing compression coil springs, etc., as described above.The pitching process in the coil axis direction of the spring when forming the compression coil spring is described later, but for example, To explain this in conjunction with the coiling mechanism shown in FIG. 2, this is done by pushing out the wire with the pitch tool 23 toward you, that is, perpendicularly to the plane of the paper. That is, the wire W sent from the wire feeding mechanism 5, comes into contact with the coiling pin 15, and is bent around the arbor 20.
The side portion of the coil spring contacts the pitch tool 23 and is pushed out in the direction of the coil axis, but since this processing is continuously performed on the wire rod W being sent out, a coil spring having a predetermined pitch is formed.

The pitch tool 129 is attached to the tip of a rod extending from a pitch block 131, and the pitch block 131 is fixed to the lower end of a T-shaped bell crank 132 which is swingable by a shaft 133. A pitch stop screw 134 is attached to one upper end of the bell crank 132, and prevents the pitch tool 129 from returning further when it comes into contact with a device body (not shown).
A pull rod 137 is engaged with the other end of the bell crank 132 via a pitch adjustment knob 135 and a spacer 136. Pitchblock 131
A return rod 138 is fixed in parallel with the rod to which the pitch tool 129 is attached, and a return spring 139 is wound around the return rod 138, so that one end of the return spring 139 hits the device body (not shown) and the pitch tool is removed. 129 in the return direction.

Therefore, when the pull rod 137 is pulled downward by the pitch cam mechanism described below, the bell crank 132 is moved by the pitch adjustment knob 135 and the spacer 1.
36 against the force of return spring 139
3 in the counterclockwise direction in the figure, thereby pushing out the pitch tool 129 to give the coil wire W a predetermined pitch. When the force to push down the pull rod 137 from the pitch cam mechanism disappears, the return spring 13 wound around the return rod 138
9 pushes the pitch block 131 and therefore the pitch tool 129 in the return direction, and tightens the pitch stop screw 1.
34 is returned until it comes into contact with the device main body (not shown). The pitch cam 140 is a cam that pushes down the pull rod 137 to cause the pitch tool 129 to perform a desired pushing operation, and is clamped and fixed to a pitch cam holder 142 integrated with a pitch cam shaft 143 by a pitch cam presser 141.
The pitch camshaft 143 rotates in synchronization with the wire feeding mechanism, and it takes one turn to form one coil.
Rotate.

A cam roller lever 145 is rotatably supported on a connecting rod 146 arranged parallel to the pitch camshaft 143.
5 has a cam roller 144 pivotally supported at its tip in parallel with the pitch cam shaft 143, and the cam roller 144 comes into contact with the cam peripheral surface of the pitch cam 140 and rolls. One end of a compound lever 148 having a rectangular cross section is rotatably supported on a shaft 150 parallel to the connecting rod 146. A lever block 147 is mounted on the tip side of the compound lever 148, and a lever block 147 is mounted near the center of rotation. A connector 151 with a pull rod 137 is provided. The lever block 147 is connected to the compound lever 148 by a lever block adjustment screw 149 provided at the tip of the compound lever 148.
The lever is adjustable in the axial direction of the lever, so that the contact point with the cam roller lever 145 can be adjusted, that is, the ratio of each lever to the connecting rod 146 and the shaft 150 can be changed. The upper surface of the lever block 147 is a smooth convex surface to reduce sliding friction with the cam roller lever 145. The connector 151 is integral with the pull rod 137 but is pivotally supported on the compound lever 148. In addition, in the figure, the reference numeral 147a indicates a cap screw.

Further, the relationship between the lever block 147 and the compound lever 148 can be configured as shown in FIGS. 7A and 7B. Parts that achieve the same function are given the same reference numerals, and explanations thereof will be omitted.

As is well known, the pitch cam 140 consists of two cam plates divided in the axial direction, and by adjusting the relative cam phase of these two cam plates, the pitch cam 140 can be adjusted to The rise can be easily adjusted. Since the pitch mechanism 130 is configured as described above, when the portion corresponding to the peak of the pitch cam 140 comes into contact with the cam roller 144, the cam roller lever 145 and the compound lever 148 are pushed down, and the pitch tool is moved through the bell crank 132. 129
will be pushed out. When the part corresponding to the valley of the pitch cam 140 rotates, return spring 1
The cam roller 144 follows the pitch cam 140 due to the return action of 39.

In such a pitch mechanism 130, the operating stroke of the pitch tool 129 is the same as the lever block 147 on the compound lever 148.
The operating timing of the pitch tool 129 is adjusted by changing the shape of the pitch cam 140 or the relative phase difference between the two cam plates forming the pitch cam. The operating bias of the pitch tool 129 is adjusted by the screwing amount of the pitch adjustment knob 135.

[The problem that the idea attempts to solve]

However, among these adjustments, the adjustment of the operating bias of the pitch tool 129 can be directly adjusted by operating the pitch adjustment knob 135, which is located on the top side of the device body. While coiling is monitored from the front of the device, adjusting the operating stroke and timing is done because the adjustment parts for these are located inside the device.
This has to be done through a window on the side of the main body of the device, making it difficult to access these adjustment parts and making adjustments after access, and the work time is long, resulting in extremely poor workability.

Further, a pitch cam shaft 143 passes through the device main body from the front frame to the rear frame.
Since it is installed in the middle of 43, Pitzicam 1
40 to and from the pitch camshaft 143 is impossible or extremely difficult, and in addition, the reproducibility of the mounting state is also poor.

The purpose of this invention is to solve the above-mentioned problems, and to provide a pitch mechanism in which the main adjustment part for the pitch tool is located in front of the front panel of the device body of the coil spring manufacturing device. The purpose is to devise the arrangement of the pitch cam and the pitch stroke adjusting member in the coil spring manufacturing equipment so that the operator can access the pitch cam and the pitch stroke adjusting member from the front of the equipment body of the coil spring manufacturing equipment, and to improve the pitch cam and the pitch stroke adjusting member. The object of the present invention is to provide a pitch mechanism for a coil spring manufacturing device that can be attached and detached at the shaft end of a pitch camshaft.

[Means to solve the problem]

In order to solve the above problems and achieve the above objects, this invention is configured as follows.
That is, this invention provides a coil spring having a pitch cam in which the operating timing of the pitch tool can be adjusted, a cam follower that swings in contact with the pitch cam, and a pitch stroke adjustment member that reciprocates the pitch tool in conjunction with the swinging motion of the cam follower. In the pitch mechanism of the manufacturing device, the pitch cam shaft to which the pitch cam is attached, the connecting rod to which the cam follower is attached, and the shaft to which the pitch stroke adjusting member is attached are extended toward the front frame of the device main body, and the pitch cam, the cam follower, and the pitch cam shaft are extended toward the front frame of the device main body. The present invention relates to a pitch mechanism for a coil spring manufacturing apparatus, characterized in that a pitch stroke adjusting member is disposed outside the front frame of the apparatus main body.

Furthermore, in the pitch mechanism of this coil spring manufacturing apparatus, it is preferable that the pitch cam is clamped and fixed between the U-shaped washer and the end of the pitch cam shaft using a mounting bolt whose head has a smaller diameter than the mounting hole of the pitch cam. It is.

In addition, in the pitch mechanism of this coil spring manufacturing apparatus, the pitch stroke adjustment member is provided in a fixed position while sliding on a swingable compound lever on a shaft parallel to the camshaft, and on a lever block that contacts the cam follower. Preferably, it consists of:

Furthermore, in the pitch mechanism of this coil spring manufacturing apparatus, the cam follower includes a cam roller lever that swings on a connecting rod parallel to the camshaft, and a cam roller lever that is rotatably provided on the cam roller lever about an axis that is parallel to the camshaft. Preferably, the cam roller comprises a pitch cam and a cam roller in contact with the pitch cam.

[Effect]

The pitch mechanism of the coil spring manufacturing apparatus according to this invention is constructed as described above, and therefore operates as follows. That is, in the pitch mechanism of this coil spring manufacturing device, the pitch cam provided on the outside of the front frame of the device body of the pitch camshaft rotates as the pitch cam shaft rotates, and the cam follower that comes into contact with the cam sliding surface of the pitch cam rotates. oscillate. This oscillation of the cam follower is converted into a reciprocating motion of the pitch tool via a pitch stroke adjustment member similarly provided outside the frame. The reciprocating motion of the pitch tool imparts a pitch to the coiled spring wire at a predetermined timing.

In the pitch mechanism of this coil spring manufacturing device, when it is necessary to adjust the stroke and timing of the pitch tool, the shaft to which the pitch camshaft, connecting rod and pitch stroke adjustment member are attached is extended toward the front frame of the device body, Since the pitch cam, cam follower, and pitch stroke adjustment member are arranged outside the front frame of the device main body, it is possible to access the pitch cam and pitch stroke adjustment member located outside the front frame by simply removing the front panel of the device main body. I can do it. Further, the pitch cam can be replaced or the mounting state corrected with good work efficiency since the mounting bolt can be attached and removed at the end of the pitch cam shaft.

〔Example〕

An embodiment of the pitch mechanism of the coil spring manufacturing apparatus according to this invention will be described below with reference to the drawings.

FIG. 1 shows a coil spring manufacturing apparatus 1 incorporating a pitch mechanism according to this invention. 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.
Contains. The coil spring wire W wound on a reel stand (not shown) is passed through a strainer 4.
The wire is sent to the wire feeding mechanism 5 while its distortion is corrected. 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.

An arbor holder mounting plate 19 is fixed to the wire feeding mechanism 5 side of the tool cassette 3, and the arbor holder mounting plate 19 is provided with an arbor 20 and a coil spring wire W for guiding the coiling mechanism together with the coiling pin 15. A wire guide 21 is fixedly provided. Further, a block guide 22 and a pitch tool 23 constituting a pitch mechanism are attached to the arbor holder mounting plate 19. An arbor holder 24 that holds the arbor 20 is attached to the back side of the arbor holder mounting plate 19, and a pitch tool shaft 25 for driving the pitch tool 23 passes through it.
3 can reciprocate together with the pitch tool shaft 25 in the direction of penetration of the arbor holder 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 it is set by screwing in the holding bolt for the arbor holder 24 from outside the device main body 2, and the pitch tool shaft 25 By taking predetermined timing measures, loading of the tool cassette 3 into the main body 2 of the apparatus is completed.

The pitch mechanism of the coil spring manufacturing device according to this invention is shown in FIGS. 3 and 4.
Next, this pitch mechanism will be explained.

According to an embodiment of the pitch mechanism of the coil spring manufacturing apparatus according to this invention, the pitch stroke adjustment member is composed of a pitch cam 40 and a lever block 47 that slides on a compound lever 48 and is provided in a fixed position and abuts against the cam follower. is provided on the outside of the front frame 52 provided in the device main body 2 of the coil spring manufacturing device 1.
In the pitch mechanism of this coil spring manufacturing equipment,
As shown in FIG. 3, a pitch cam shaft 43 to which a pitch cam 40 is attached, a connecting rod 46 to which a cam follower is attached, and a shaft 50 to which a pitch stroke adjusting member is attached are extended toward the front frame of the apparatus main body.

Therefore, a pitch cam 40 for adjusting the operation timing of these pitch tools 23 is provided at the front end of a pitch cam shaft 43 supported in a cantilevered manner on the front frame 52, and the compound lever 48 is also mounted on the front frame 52. It is provided at the front end of the shaft 50 supported in a cantilevered manner. Therefore, these adjustment parts can be easily accessed by the operator by removing the front panel 53 (see FIG. 1) of the main body 2 of the apparatus. Regarding the cam follower, a cam roller lever 45 which can swing freely is attached to a connecting rod 46 parallel to the pitch camshaft 43, and a cam roller lever 45 is provided on the free end side of the cam roller lever 45 so as to be rotatable around an axis parallel to the pitch camshaft 43. 4
The cam roller lever 45 also has a front frame 52.
The connecting rod 46 is provided at the front end of a connecting rod 46 supported in a cantilevered manner. As shown in FIG. 4, the pitch cam 40 is attached to the pitch cam shaft 43 by using a large diameter pitch cam holder 42 at the front end of the pitch cam shaft 43, and a small diameter section at the tip thereof. The pitch cam 40 is fitted and the key and keyway 51 are engaged to prevent rotation. When a mounting bolt 54 whose head diameter is smaller than the mounting hole of the pitch cam 40 is screwed into the end face of the small diameter section, the pitch cam 40 is sandwiched and fixed between the shoulder between the pitch cam holder 42 and the small diameter section and the U-shaped washer 55. can do. U-shaped washer 55
The outer circumferential edge on one side engages with the inner circumferential edge of the pitch cam 40, and the inner circumferential edge on the other side engages with the head of the mounting bolt 54.

By the way, it goes without saying that the structures of the cam roller lever 45, lever block 47, compound lever 48, lever block adjustment screw 49, etc. can be constructed as shown in FIGS. 7A and 7B. , these structures and operations are the same, so a description thereof will be omitted.

The operation of this embodiment is basically the same as that of the conventional example shown in FIG. 6, so its explanation will be omitted here. To adjust the pitch stroke, loosen the presser screw 47a and turn the lever block adjustment screw 49.
By moving the lever block 47 on the compound lever 48 using the 37 strokes can be changed. To adjust the operation timing of the pitch tool 23, loosen the mounting bolt 54 screwed into the pitch cam holder 42 and remove the U-shaped washer 55, then replace the pitch cam 40 or replace the two cams without completely removing the mounting bolt 54. This can be done by changing the relative phase of the plates.

[Effect of idea]

Since the pitch mechanism of the coil spring manufacturing apparatus according to this invention is constructed as described above, it has the following effects. That is, as described above, the pitch mechanism of this coil spring manufacturing device is such that the shaft to which the pitch camshaft, connecting rod, and pitch stroke adjustment member are attached is extended toward the front frame of the device body and attached to the pitch camshaft. The pitch cam, the cam follower attached to the connecting rod, and the pitch stroke adjusting member attached to the shaft can be disposed outside the front frame of the apparatus main body. Therefore, to adjust the operating stroke and timing of the pitch tool, coiling is monitored on the pitch stroke adjustment member and pitch cam located outside the front frame at the front of the device body with the front panel removed. It can be done while

Furthermore, the pitch cam can be modified or replaced very easily since it is attached to the end of the pitch cam shaft rather than to the middle part thereof. Furthermore, since the operating stroke and operating timing of the pitch tool can be adjusted quickly and easily, the operating time can be shortened, and the adjustment workability is greatly improved, resulting in improved operational efficiency of the coil spring manufacturing apparatus.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the entire coil spring manufacturing apparatus to which the pitch mechanism of the coil spring manufacturing apparatus according to this invention is applied, and Fig. 2 shows the main parts of the coiling mechanism including the pitch tool of the pitch mechanism of the coil spring manufacturing apparatus according to this invention. 3 is a perspective view showing details of the pitch mechanism of the coil spring manufacturing apparatus according to this invention; FIG. 4A is a front view showing the mounting part of the pitch cam of the pitch mechanism of FIG. Figure B is a sectional view of Figure 4A, Figure 5 is a main part diagram of a conventional coil spring manufacturing apparatus, Figure 6 is a perspective view showing a pitch mechanism applied to the coil spring manufacturing apparatus, and Figure 7A is a FIG. 7B is a side view showing the relationship between the lever block, compound lever, and lever block adjustment screw in the pitch mechanism, and FIG. 7B is a plan view of FIG. 7A. 1... Coil spring manufacturing device, 2... Device main body,
3... Tool cassette, 19... Arbor holder mounting plate, 20... Arbor, 23... Pitch tool,
24... Arbor holder, 25... Pitch tool shaft, 30... Pitch mechanism, 37... Pull rod,
40... Pitch cam, 42... Pitch cam holder, 43... Pitch cam shaft, 44... Cam roller, 45... Cam roller lever, 46... Connecting rod, 47... Lever block, 50... Shaft, 51... Key and key groove, 52...Front frame, 53...Front panel, 54...Mounting bolt, 55...U-shaped washer, W...Wire material for coil spring.

Claims (1)

[Claims for Utility Model Registration] (1) A pitch cam that can adjust the operating timing of the pitch tool, a cam follower that swings in contact with the pitch cam, and a pitch stroke adjustment that reciprocates the pitch tool in conjunction with the rocking motion of the cam follower. In the pitch mechanism of a coil spring manufacturing apparatus having members, the pitch cam shaft to which the pitch cam is attached, the connecting rod to which the cam follower is attached, and the shaft to which the pitch stroke adjustment member is attached are extended toward the front frame side of the apparatus main body, . A pitch mechanism for a coil spring manufacturing apparatus, wherein the cam follower and the pitch stroke adjusting member are disposed outside the front frame of the apparatus main body. (2) The pitch cam is clamped to the pitch cam shaft by screwing into the end of the pitch cam shaft a mounting bolt having a head diameter smaller than the diameter of the mounting hole of the pitch cam with a U-shaped washer interposed therebetween. The pitch mechanism of a coil spring manufacturing apparatus according to claim 1, wherein the pitch mechanism is fixed. (3) The pitch stroke adjusting member comprises a lever block that is swingably provided on a swingable compound lever on a shaft parallel to the pitch camshaft and is configured to be able to come into contact with the cam follower. The pitch mechanism of the coil spring manufacturing device described in . (4) The cam follower includes a cam roller lever that is swingable on the connecting rod that is parallel to the pitch cam shaft, and a cam roller lever that is rotatably provided on the cam roller lever and that is rotatable about an axis that is parallel to the cam shaft. 2. A pitch mechanism for a coil spring manufacturing apparatus according to claim 1, comprising a cam roller in contact with the pitch mechanism.