JPH03165942A - Coil spring manufacturing device - Google Patents

Abstract

PURPOSE:To reduce dimensional errors and to easily and quickly perform a high accuracy adjustment by fitting a coiling tool and a pitch tool mounted on one tool cassette detachably to a device body. CONSTITUTION:A coil spring manufacturing device 1 are prepared many tool cassettes 3 which are set to various dimensions of a coil spring and adjusted in advance before the tool cassettes 3 are mounted. One tool cassette 3 is selected in accordance with the coil spring to be manufactured and, if necessary, adjusted finely. In this way, the changing operation for the tool cassette is simplified and the required time for changing operation is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to 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 material to a certain curvature to form a coil spring. The wire material for coil springs is wound on a reel stand, straightened into a straight line by a strainer, and fed into the coil spring. A coiling mechanism that bends the wire to a certain curvature, a cutting mechanism that cuts the coil, and a pitch mechanism that sets the pitch of the coil spring.

Normally, these wire feeding mechanism, coiling mechanism (when manufacturing deformed springs such as conical or barrel-shaped springs), cutting mechanism and pitch mechanism (when manufacturing compression springs, etc.) are the same during manufacturing of coil springs. They are synchronized and interlocked from the 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 to match the various dimensions of the spring. This tends to cause variations in the precision of the product, and furthermore, it is difficult to adjust each mechanism itself, and therefore, it takes a long time to adjust. In particular, in coil spring manufacturing equipment, the number of pieces manufactured per unit time is large,
Long adjustment times reduce equipment availability and make manufacturing inefficient.

In order to eliminate such troubles, a coil spring manufacturing apparatus as described in Japanese Utility Model Publication No. 53-42583 has been disclosed. For this coil spring manufacturing equipment, in order to make springs with different shapes and dimensions possible, we prepare several types of UNISOTO with wire diameters, winding diameters, pistons, etc. set in advance, and change the unit as necessary. The coil spring can be made more impressive by selecting and inserting it into the main body of the device.When creating springs with different shapes and dimensions, all you have to do is attach and detach the pre-adjusted unit, and the operation of the device can be changed. Since it is only necessary to stop the product when replacing the coil spring, the time required to stop the equipment due to changes in the specifications of the coil spring is reduced, the time spent on adjustments is shortened, and there is no variation in the product due to adjustment errors. However, the specifically disclosed coil spring manufacturing apparatus has the following structure.

That is, as shown in FIG. 5, on one base [1102, an arbor 103 for forming a coil spring is erected toward the front, and above the arbor 103 there is a desired angle with respect to the arbor 103. Coiling pin 1 that allows you to select
04 is mounted on the pin angle adjustment table 105, and the pin angle adjustment table 105 is mounted on the slide plate guide 1 on the base plate 102.
Sliding gIl06 guided at 07 and slidably set by an operating lever 108 on a lever 109 installed on the main body of the device.
A coiling pin device 127 is mounted on the coiling pin device 127. In addition, a base 1 is installed on the left and right sides of the arbor 103.
A horizontal sliding plate 115 is provided which is guided by a horizontal sliding plate guide 116 on 02 and slides in the direction of the arbor 103,
A cutter 114 is detachably attached to the tip of the sliding plate 115 to form a cutter mount W126. Furthermore, arbor 10
3, a pair of feed rollers 121 are provided adjacent to each other at the front ends of two wheels passing through the base 102 in the front and back directions.
A gear (not shown) is pivotally attached to the back surface of the feed roller 121, and a final wire guide 123 is installed above and below the adjacent portion of the feed roller 121.
A wire feeding device 128 is provided with a pressure adjusting screw 122 that can adjust the finger contact pressure of the feed roller 121. The base 102 is a unit made up of these devices 126, 127, and 128, and by attaching this unitized base 102 to the front of the device body, it can be attached to the device body on the sliding plate 106 of the coiling pin assembly N127. The operating rod 108 on the pivoting rod 109 is in a connected state, and the swinging rod pivotally installed on the main body of the device is inserted into the groove recessed in the outer end of the horizontal sliding plate 115 of the cutter unit 1126, that is, the horizontal sliding plate guide 116. The roller 117 at the tip of the pitch tool 118 is inserted into the cutter 114, and the cutter 114 slides in the direction of the arbor 103 by an appropriate movement from the movement mechanism. The roller provided at the end of the line feeder 1128 contacts the roller provided at the end of the line feeder 1128, and operates the pinch tool 111 by the operation from the pinch adjustment device.
These operate in series so that a gear (not shown) attached to the rear end of the shaft meshes with a drive gear (not shown) installed in the main body of the device to appropriately feed the wire W to the arbor 103. It is structured like this.

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 is horizontally aligned. The sliding plate 115 and the pisochi tool 111 are fitted into or in contact with the roller 117 on the swinging rod 1l8 and the roller on the lever provided on the mounting body, and the sliding plate 106 of the coiling pin 104 is also installed in the coil spring manufacturing equipment in the same manner as described above. if01
It is connected to the upper lever 109 via the operating lever l08.

Next, with reference to FIG. 6, an example of the pitch mechanism 130 used in the coil spring manufacturing apparatus will be described. As mentioned above, the pitch mechanism 130 is necessary when manufacturing compression coil springs, etc., and the pitching process in the coil axis direction of the spring when shaping the compression coil spring is described later, but for example, In FIG. 3, this is done by pushing out the wire in front of the pisochil 23, that is, in a direction perpendicular to the plane of the paper. That is, when adapted to the coil spring manufacturing apparatus 1 of this invention, the coiling pin 15 is fed from the wire feeding device 5.
The wire W that is in contact with and bent around the arbor 20 is
The side portion contacts the pisochi tool 23 and is pushed out in the axial direction of the coil, but since this processing is continuously performed on the wire rod W to be sent out, a coil spring with a predetermined pinch is formed.

In the pitch mechanism 130 shown in FIG.
The bell crank 132 is fixed to the lower end of a T-shaped bell crank 132 that is swingable. 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). bell crank 132
On the other hand, the pitch adjustment knob 135 and the spacer 1
A pull rod 137 is engaged through 36. A return iron 138 is fixed to the pitch lock 131 in parallel with the iron on which the pitch tool 129 is attached, and a return spring 139 is wound around the return iron 138, and one end of the return spring 139 comes into contact with the device main body (not shown). This forces the pinch tool 129 in the return direction. Therefore,
When the pull rod 137 is pulled downward by the visotic cam mechanism described below, the bell crank 132 rotates counterclockwise in the figure around the shaft 133 against the force of the return spring 139 via the pinch adjustment knob 135 and the spacer 136. Then, the pitch tool 129 is pushed out to give the coil wire W a predetermined pitch. When the force to push down the bull rod 137 from the pitch cam mechanism disappears, the return spring 139 wound around the return iron 138 pushes the pitch block l31, and therefore the pisotir 129, in the return direction, and the pitch stop screw 134 comes into contact with the device main body (not shown). Restore until.

The pitch cam 140 is a cam that pushes down the pull rod 137 to cause the bisochi tool 129 to perform a desired pushing operation, and is supported and fixed by a bisochi cam presser 141 to a pitch cam holder 142 that is integrated with a pitch cam shaft 143. The pinch camshaft 143 rotates in synchronization with the wire feeding mechanism, and makes one revolution to shape one coil.

Connecting rod 1 arranged parallel to pitch camshaft 143
4G, a cam roller lever 145 is rotatably supported, and the cam roller lever 145 has a cam roller 144 supported at its tip in parallel with the pitch force shaft 143. It comes into contact with the cam circumferential surface 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, and a lever block 147 is attached to the tip side of the compound lever 148, and the center of rotation is Nearby is Pururosodo 137
A connector 151 is provided. Lever block 1
47 is adjustable in the lever axis direction of the compound lever 148 by a lever block adjustment screw 149 provided at the tip of the compound lever 148, and the point at which it connects to the cam roller lever 145 is adjusted, that is, the connecting rod 146 and the shaft 150 can be changed. lever pronk 14
The upper surface of 7 is a smooth convex surface to reduce sliding friction with the cam roller lever 145. Connector 151
is integral with the pull rod 137, but is supported on the compound lever 148. The pisochi cam 140 is composed of two cam plates divided in the axial direction,
By adjusting the relative cam phases of these two cam plates, it is possible to easily adjust the winding start, end winding, and rise of the coil.

Since the pitch mechanism 130 is configured as described above,
The portion corresponding to the peak of the pinch cam 140 is the cam roller 14
4, the cam roller lever 145 and the combined lever 148 are pushed down l1, and the pisochi tool 129 is pushed out via the hell crank 132. When the part corresponding to the valley of the pinch cam 140 rotates, the return spring]3
Due to the return action of 9, the cam roller 144
Follows 0.

[Problem to be solved by the invention]

However, the coil spring manufacturing apparatus 101 described in the above publication has the following problems. (1) The base 102 of the unit 7 includes a feed roller l21, a coupling gear and a cutter 114, a bitch tool 111, and a coiling pin 104, which are considered to be part of the device.
Since the link parts and contact parts of the coil springs are made of UniSoto, there is an increased chance of dimensional errors between the UniSoto base 102 and the main body of the device during the manufacturing of coil springs, and good accuracy is adversely affected. It's getting harder to get caught.

(2) Due to such unitization, the positioning of the base 102 to the mechanism to be inserted into the main body of the apparatus cannot be performed satisfactorily.

12 (3) Similarly, for such unitization, the tie ring that is aligned with the mechanism to be inserted into the device body needs to be matched at a certain moment during one cycle of coil spring manufacturing. As a result, positioning during installation cannot be performed well, and matching adjustment takes time.

(4) Since the entire base 102 of the unit is large and heavy, it takes time to attach and detach it from the main body of the device, and the efficiency of the replacement work is poor.

(5> The base 102 of the unit alone has several tens of parts, and the manufacturing cost is high due to the necessity of preparing the base 102 for each size of coil spring.

(6> The method for fastening the base 102 of the unit to the device body is not clearly described, but considering that the positioning to the device body is not very good, it is difficult to install and takes a considerable amount of time to fasten. It takes time.

The purpose of this invention is to solve the above problems,
The object of the present invention is to provide a coil spring manufacturing apparatus in which the minimum necessary tools are made into a cassette for each spring size to be manufactured. Specifically, the base 102 serving as a unit of the above-mentioned known coil spring manufacturing apparatus 101 is a coil spring manufacturing apparatus. Although these tool parts are the minimum necessary for manufacturing a spring, these tool parts are constructed as part of the main body of the device and are included in the unitized base 102, which causes the various problems mentioned above. In the coil spring manufacturing device according to this invention, by incorporating the non-adjustable part into the main body of the device, it is possible to simplify the installation and fastening of the tool cassette carrying the remaining tool parts, and to The number of parts that make up the tool cassette 7) is minimized to prevent an increase in the overall weight of the tool cassette and the manufacturing cost of the parts, and a number of types are prepared for each size and type of coil spring to be manufactured. To provide a coil spring manufacturing device capable of uniformizing coil spring products, improving product reliability, and improving production efficiency by easily and quickly replacing coil springs as needed. .

[Means for Solving the Problems] In order to achieve the above object, the present invention is structured as follows. That is, the present invention provides a coil spring manufacturing apparatus that manufactures a coil spring by bending and cutting a wire fed from a wire feeding mechanism, in which a coiling tool of a coiling mechanism and a pinch tool of a pinch mechanism are mounted in one tool cassette. The present invention relates to a coil spring manufacturing apparatus, characterized in that the tool cassette is removably attached to the apparatus main body.

Further, in this coil spring manufacturing apparatus, the tool cassette includes a base that is fixed to the main body of the apparatus without changing its position, and a base that is attached to the base so as to be adjustable back and forth in the wire feeding direction of the wire feeding mechanism, and the coiling tool. and a slide body equipped with pisotyl.

Further, in this coil spring manufacturing apparatus, the coiling pin is attached to the slide body so as to be adjustable in a direction perpendicular to the wire feeding direction of the wire feeding mechanism within a mounting surface of the tool cassette to the device body. It is something that exists.

Further, in this coil spring manufacturing apparatus, the coiling pin is attached to the slide body so as to be freely adjustable in a direction perpendicular to a mounting surface of the tool cassette to the apparatus body.

Further, a holder mounting plate is fixed to the base body for a holder that holds the arbor of the coiling mechanism and the bissochi tool of the pinch mechanism, and the holder is configured to extend into the body of the coil spring manufacturing apparatus.

[Effect]

Since the coil spring manufacturing apparatus according to the present invention is configured as described above, it has the following effects. That is,
In this coil spring manufacturing equipment, when there is a change in the dimensions or type of spring to be manufactured, the coiling tool for the coiling mechanism and the bitch tool for the pinch mechanism, which are the parts that require adjustment, are assembled in advance into a single cassette using a tool cassette. Select and load. The wire for the coil spring 16 sent to this tool cassette from the wire feeding mechanism, which is one of the non-adjustable parts, is given a predetermined coil diameter and pitch within this tool cassette. The shaped coil spring is cut from the following coil spring wire by a cutter of a cutting mechanism also included in the non-adjustable portion.

Further, in this coil spring manufacturing apparatus, each tool in the tool cassette is preferably adjustable from various viewpoints. These adjustments have been made in advance for various spring sizes, and several types of tool cassettes are available with these adjustments. Therefore, once the dimensions, type, etc. of the coil spring to be manufactured are determined, a tool cassette suitable for the dimensions, etc. is selected and installed in the main body of the apparatus.

Therefore, after the tool cassette is attached to the main body of the apparatus, it is usually not necessary to adjust each tool, but it goes without saying that each tool may be finely adjusted if necessary. Since the slide body is movable back and forth in the line feeding direction of the line feeding mechanism with respect to the base fixed to the device body, the coiling pin that moves integrally with the slide body is connected to the arbor fixed to the holder mounting plate. The spacing is adjusted.

Further, the coiling pin can be adjusted with respect to the slide body in a direction perpendicular to the line feeding direction of the line feeding mechanism within a mounting surface of the tool cassette to the apparatus body. According to this, the position of the coiling pin with respect to the arbor in the orthogonal direction is adjusted.

Further, in this coil spring device, the coiling pin can be adjusted with respect to the slide body in a direction perpendicular to a surface on which the tool cassette is attached to the device body. According to this adjustment, the position and orientation with respect to the arbor are adjusted in this direction.

Further, the arbor of the coiling mechanism and the pitch tool of the pitch mechanism are collectively held by a holder, and in order to form this holder into a cassette, they are fixed to the slide body of the tool cassette via a holder mounting plate. Therefore, when loading the tool cassette into the machine body, the bisochi tool is installed together with the tool cassette into the machine body, and is linked with the operating part of the pitch mechanism inside the machine body to perform a predetermined pinching operation during coil manufacturing. conduct.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the coil spring manufacturing apparatus according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a coil spring manufacturing apparatus 1 equipped with a tool cassette 3 that is unitized or cassetted according to the present 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.

A coil spring wire W (see FIG. 4) wound on a reel stand (not shown) is sent to the wire feeding mechanism 5 while its distortion is corrected by a strainer 4. The coil spring wire W is sent to the tool cassette 3 by the wire feeding mechanism 5, and is shaped into a coil having desired dimensions. As shown in FIG. 1 and FIG.
installed so as to be munched at the outlet of the

This tool cassette 3 is shown in detail in FIGS. 2 and 3. 7 Hokono Tool Car 19 This is the base of Sesotho 3, and guide plates 8.8 are arranged in parallel on the upper and lower sides of this base 7.
The guide plate 8.8 is a mounting plate 9.9 having an L-shaped cross section.
The connecting bolt 10 passed through the Daruma-shaped hole 9a is inserted into and fixed to the center mounting portion of the main body 2 of the device. Daruma type hole 9
The larger hole a, the insertion hole for the connecting bolt 10 in the guide plate 8 and the base 7 are all larger than the head of the connecting bolt 10, so when installing or removing the tool cassette 3, the connecting bolt 10 must be inserted into the main body of the device. In contrast to 2, this can be done without completely removing it. Before the guide plate 8.8 is fastened with the connecting bolt 10, the slide body 11 is fitted into the groove between the base 7 and the guide plate 8.8, and the slide body 11 is inserted into the groove between the base 7 and the guide plate 8.8. It is adjustable. Adjustment of the slide body 11 in the left-right direction is possible because the tip of the Strothop screw 12 screwed into the device body 2 is in contact with the left end of the slide body 1l0) in the drawing.
This is done by adjusting the amount by which the stroke screw 12 is pushed.

20 In front of the slide body l1, both guide plates 8.8
A prosocket holder 13 is disposed in between and is fastened to the slide body 11 by a connecting pin 14, but it is slightly rotatable around this connecting pin 14, as will be described later.

The block holder 13 has a U-shape that opens toward the wire feeding mechanism 5, and a coiling pin 15 is inserted into this opening.
For example, a coiling pin holder 16 integrally tightened with a countersunk bolt is housed. By adjusting the two machine screws of the coiling pin holder 16 as appropriate, 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 side end of the coiling pin 15 of the slide body 11, protrusions 17, 17 protruding toward the front are provided. A dynamic adjusting screw 18.18 clamps the coiling pin holder 16 at its tip. 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.

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 the arbor holder mounting plate 19, together with the coiling pin 15, has an arbor 20 and a wire for controlling the coiling mechanism. A guide 21 is fixedly provided. Further, a prosocket guide 22 and a pitch tool 23 which functions as a pitch mechanism are attached to this mounting plate 19. An arbor holder 24 that holds an arbor 20 is attached to the back side of the mounting plate 19, and a pitch tool shaft 25 for driving a pitch tool 23 passes through the mounting plate. It is movable in the penetrating direction of 19. When the tool cassette 3 is attached to the device main body 2, it is inserted into the device main body 2 at the same time.
Since it is set by screwing in the retainer bolt 26 for the arbor holder 24 (shown in the head of the device body 2 in FIG. 2) from the outside, the device of the tool cassette 3 can be set by screwing in the holding bolt 26 for the arbor holder 24 (shown in the head of the device main body 2 in FIG. 2). Loading into the main body 2 is completed.

In the coil spring manufacturing apparatus l according to the present invention, as already mentioned, the various adjustments described above are usually made in advance according to the various dimensions of the coil spring before the tool cassette 3 is installed. A large number of tool cassettes 3 are prepared, one tool cassette 3 is selected according to the coil spring to be manufactured, and if necessary, fine adjustment is made according to the above adjustment method. By doing so, the replacement work of the tool cassette 3 is simplified, and the time required for the replacement work is also significantly shortened.

Although the coiling pin 15 has been described as being stationary during coil spring manufacturing, if the coiling mechanism is configured to move left and right in synchronization with other tools, the coiling pin 15 can be shaped into a conical or barrel shape in which the coil winding diameter changes. Of course, it is possible to manufacture deformed springs of.

〔Effect of the invention〕

23 The coil spring manufacturing apparatus according to the present invention is configured as described above, and has the following effects.

That is, regarding this invention, (1) For each coil spring product to be manufactured, the tools including the parts that require adjustment are adjusted in advance and made into cassettes, so there is little chance of dimensional errors occurring, and there is usually no problem with the subsequent adjustment. Since no adjustment is required, the replacement work time is significantly shortened, and even in the unlikely event that the dimensions do not match, high-precision adjustment can be easily and quickly obtained without requiring advanced technology by performing a adjustment. can.

(2) Since the tool cassette only requires fitting and fixing the base and arbor holder into the apparatus main body, the tool cassette can be positioned with respect to the apparatus main body very well.

(3) When attached to the main body of the device, the timing during one cycle of coil spring manufacturing is only for the bitch tool, which, combined with good positioning, allows matching adjustment to be performed easily and in a short time. Can be done.

(4) The tool cassette is a cassette containing only the parts that require adjustment, that is, the tools for the coiling mechanism and the pinch mechanism, so the overall weight is light and it can be handled smoothly. It is easy to attach and detach, and the time required to do so can be significantly shortened.

(5) The number of parts in the tool cassette is significantly smaller than that of conventional technology because only the parts that require adjustment are made into cassettes, and the number of cassettes prepared in advance for each coil spring product is significantly smaller. Therefore, manufacturing costs are reduced.

(6) The tool cassette can be attached to the main body of the device only by fastening with bolts, so it is relatively easy and the time required for it is short.

(7) Overall setup time is shortened, and products can be manufactured immediately if there is a request for spring manufacturing.

(8) Since each coil spring product is made into a cassette, there is no error in reading drawings at the manufacturing site, and the proportion of defective products can be reduced.

(9) Since the degree of wear of the tools in the tool cassette can be easily determined each time they are replaced, management of the tool cassette, product quality control, etc. are easy.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the coil spring manufacturing apparatus according to the present invention, and is a schematic perspective view showing how a tool cassette is attached to the apparatus main body, and Fig. 2 shows the apparatus main body of the coil spring manufacturing apparatus of Fig. 1. A front view showing the installed tool cassette, FIG. 3 is a perspective view showing details of the tool cassette in the coil spring manufacturing device shown in FIG. 1, and FIG. 4 shows the tool force center and wire feed in the coil spring manufacturing device shown in FIG. FIG. 5 is a front view showing a conventional coil spring manufacturing apparatus, and FIG. 6 is a perspective view showing a pinch mechanism applied to the coil spring manufacturing apparatus. i---1---Coil spring manufacturing device, 2---1 apparatus main body, 3---tool cassette, 4---1...
Strainer, 5...--Line feed mechanism, 6...-
Feed roller, 7-・- Base, 8-------
Guide plate, 9...--Mounting plate, 10--Series connection bolt, 11--Slide body, l2--
Stop screw, 1 3--11--Block holder, 14--Series connection pin, 1 5--Coiling pin, 16 Coiling pin holder, 17--1 protrusion, 18-・−・・Adjustment screw 19−・−・Arbor holder mounting plate, 20・−・−・Arbor, 21・−
・・・-・Wire guide, 22-・Prosoku guide, 2
3---Pisotyl, 24---Arbor holder, 2 5---Pinch tool shaft, W-wire rod.

Claims (5)

[Claims] (1) In a coil spring manufacturing device that manufactures a coil spring by bending and cutting a wire sent out from a wire feeding mechanism, a coiling tool of the coiling mechanism and a pitch tool of the pitch mechanism are mounted in one tool cassette, A coil spring manufacturing apparatus characterized in that the tool cassette is removably attached to the apparatus main body. (2) The tool cassette includes a base that is fixed to the main body of the device without changing its position, and is attached to the base so as to be adjustable back and forth in the line feeding direction of the line feeding mechanism, and includes the coiling tool and the pitch tool. 2. The coil spring manufacturing apparatus according to claim 1, further comprising a slide body mounted thereon. (3) The coiling pin of the coiling mechanism is attached to the slide body so as to be adjustable in a direction perpendicular to the line feeding direction of the line feeding mechanism within the tool cassette attachment surface to the device body. The coil spring manufacturing apparatus according to claim 1. (4) The coiling pin of the coiling mechanism is attached to the slide body so as to be adjustable in a direction perpendicular to a mounting surface of the tool cassette to the device body. The described coil spring manufacturing device. (5) A holder mounting plate for a holder that holds the arbor of the coiling mechanism and the pitch tool of the pitch mechanism is fixed to the base, and the holder extends into the apparatus main body. Claim 2 characterized by
, 3 or 4. The coil spring manufacturing device according to item 3 or 4.