JPH0328305B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In forming power transmission belts, a cord serving as a strength member is precisely wound on an unvulcanized sheet wrapped cylindrically around a mandrel at a pitch stipulated in the specifications of the power transmission belt. However, in conventional power transmission belt forming equipment, there is only one set of winding heads with touch pulleys, and the winding head is fed by being driven from the mandrel drive shaft via a chain, gears, etc. Therefore, when changing the type or type of belt, it is necessary to change the cord, replace the gear, etc. Since power transmission belts are manufactured in small quantities in a wide variety of products, it requires a great deal of labor. Utilization rate decreases and work in process increases.

Additionally, when the circumference of the transmission belt changes, the distance between the center of the mandrel and the center of the touch pulley needs to be changed, which takes time to adjust the position each time the circumference changes, and the use of a cylinder with a large stroke can cause oscillation, etc. There is a problem with this.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a labor-saving power transmission belt forming device that can quickly and accurately respond to changes in cord type, cord winding pitch, cord winding diameter, etc. With the goal.

To this end, the present invention provides a mandrel that wraps an unvulcanized sheet around its outer periphery and rotates around an axis, and a mandrel that rolls into contact with the unvulcanized sheet to supply a cord onto the unvulcanized sheet. a cord feeding machine that wraps the
A power transmission belt forming apparatus including a moving mechanism driven by a motor to move the cord feeder in the axial direction of the mandrel, comprising: a pulse transmitter that transmits pulses in conjunction with rotation of the mandrel; The present invention is characterized by comprising a control circuit that controls movement of the cord feeding machine based on the output.

An embodiment of the present invention will be explained with reference to the drawings.
Fig. 1 is a side view, Fig. 2 is a sectional view taken along - in Fig. 1, Fig. 3 is a horizontal sectional view taken along - in Fig. 1, and Fig. 4 is a sectional view taken along - in Fig. 2. FIG. 5 is a block diagram showing the control circuit of the cord supply mechanism of FIG. 1, FIG. 6 is a side view showing the second embodiment of the present invention, and FIG. 7 is a block diagram showing a control circuit of the code supply mechanism in FIG. 6. FIG.

First, in FIGS. 1 to 4, 1 is a headstock housing, 2 is a tailstock housing, and 3 is a mandrel. It is rotated together with a main shaft 9 which is supported by a bearing 8 of the headstock housing 1 via a timing belt 7.

On the other hand, a pulse transmitter 13 is attached to the left end of the main shaft 9, and the right end of the mandrel 3 is pivotally connected to the tail stock housing 2.

Reference numeral 14 denotes a column that supports the rail 16 of the winding head support bracket 15. The lower part is fixed to the head stock housing 1 with a bolt 17, the upper part is fixed to the rail 16 with a bolt 18, and the upper right end of the rail 16 is attached to a bolt 20. The lower part of the support 19 is fixed to the floor surface with bolts 21.

Numeral sets of winding heads a are each fixed to a winding head support bracket 15, and a touch pulley 22 is connected to the cord guide 2 at the tip of each winding head a.
4 are both pivotally connected to the arm 25 by pins 23,
The arm 25 has one end pivotably attached to the bracket 25a via a pin 26, and the other end pivoted to a rod of an air cylinder 27 attached to the bracket 25a, and a guide is attached to the winding head a. Rollers 28 and 29 are each pivotally mounted.

The winding head support bracket 15, as shown in FIG. It is possible to move left and right by rotating a threaded rod 35, which is connected via a screw rod 35 and whose both ends are pivotally supported by bearings 36.

At this time, as shown in FIG.
By being guided at 7, it is possible to accurately move left and right.

Next, in FIG. 5, 50 is a data processing device, which is an 8-bit central processing unit (hereinafter referred to as
(referred to as a CPU), a full keyboard for inputting instruction data for instructing the forming order of the transmission belt, specification numbers of usage codes, transmission belt specification data such as the winding pitch, etc., and a display for confirming input data, etc. Cathode ray tube display device (hereinafter
CRT), full keyboard and CRT
A CRT interface for exchanging signals with the CPU, a digital switch for inputting the model number of the power transmission belt cord supplied to each winding head a, and a read-only memory (hereinafter referred to as (referred to as ROM)
It consists of a storage circuit including a random access memory (hereinafter referred to as RAM), and an input/output interface for transmitting and receiving signals between the CPU, sequence circuit, and drive control unit.

51 is a sequence circuit section of an electric control device that controls each drive device of the transmission belt forming device and a compressed air control device (not shown); 56 is a start and stop signal from the sequence circuit section 51 and a speed command from the data processing device 50; A thyristor Leonard type controller that controls the DC motor 4 that rotates the mandrel 3 based on data; 13 is a pulse generator that sets the traverse speed of the winding head a according to the rotational speed of the DC motor 4 during cord winding;
58 is a data processing device 50 for selecting the cord winding pitch, that is, the number of pulses to be transmitted by the pulse transmitter 13.
A frequency divider 57 converts according to the frequency division data outputted from the data processing device 50 and a digital switch signal for speed setting of the winding head a during times other than automatic winding (not shown in FIG. 5). A relay for sorting, 52, a relay for sorting the output signal of the frequency divider 58 and the output signal of the pulse generator 53 according to the output signal of the sequence circuit section 51, and 54, a relay for cord winding the selected winding head a from the standby position. A digital switch that sets the amount of movement to the starting position.
Reference numeral 53 is a pulse generator that transmits pulses with a movement amount set by the digital switch 54, and 59 is a pulse motor driver that sends and receives pulse train signals output from the relay 52, which controls the pulse motor 32 that moves the winding head a. do. Reference numeral 55 denotes a switch for detecting the standby position of the winding head a, and in addition to the above, operating devices including a manual automatic changeover switch, a start/stop pushbutton switch, an indicator light, etc. are provided.

In such a device, a plurality of codes 3 are read in advance from a plurality of code reels (not shown).
Each winding head 9 has a plurality of winding heads a (two sets are shown, but a plurality of winding heads a can be equipped depending on the specifications of the transmission belt) are connected to guide rolls 28 and 29.
(The cord gripping device is not shown).

Further, each winding head a has a unique code number assigned to each number and code 39, and the code number is assigned to the data processing device 50 by a code number setting device (not shown) corresponding to the number of the winding head a. The forming order n of all power transmission belts formed by the power transmission belt forming device in a certain period of time is entered in
The type of transmission belt, the code number used, and the cord winding pitch for each order are stored in the data processing device 50.

Here, the order of the molding codes from the data processing device 50 is determined by a counter memory in the data processing device 50, which transmits a signal to each control unit in the order of the n-th, the n+1-th, and so on.

Next, when the preparation for winding the cord is completed, as shown in FIG. It selects the data for the winding, performs the necessary calculations, and outputs data signals such as the number of the winding head a to be used, the number of rotations of the mandrel, and the frequency division ratio. Send a signal indicating that a signal has been sent.

Then, the sequence circuit section 51 is connected to the relay 5.
2 to select the winding head a, and
By sending a signal to the pulse motor driver 59 through the digital switch 54, pulse transmitter 53, and relay 52, and further rotating the pulse motor 32 with a command from the pulse motor driver 59,
As shown in FIG. 3, a threaded rod 35 is rotated through a coupling 34, and a nut 30 screwed onto the threaded rod 35 and a winding head support bracket 15 are designated along the rail 16 in the axial direction of the mandrel. The winding head a moves from the position of the standby detection switch 55 to the cord winding start position.

Next, as shown in FIG. 2, compressed air is sent from the sequence circuit section 51 to the air cylinder 27 via the hose 40 by operating a compressed air electromagnetic control valve (not shown), and the arm 25 is extended by extending the cylinder rod 42. Push down and press the touch pulley 22 that holds the specified number code against the unvulcanized sheet 38.

In FIG. 1, the left side of the winding head a shows the state in which the cord is wound, and the right side shows the state in which it is in standby and returned to its original position after completing the cord winding.

Then, the sequence circuit unit 51 issues a cord winding start signal to the DC motor controller 56, rotates the DC motor 4 in response to the command from the DC motor controller 56, and starts rotating the mandrel 3 around which the unvulcanized sheet 38 is wound. .

When the mandrel 3 rotates, the pulse transmitter 13 at the left end of the main shaft 9 also rotates around the pulleys 10, 11 and belt 12.
The frequency divider 58 transmits the frequency-divided pulse signal to the relay 52 according to the frequency division ratio data signal output from the data processing device 50 via the relay 57. is sent to the pulse motor driver 59 via the pulse motor driver 59, and then the pulse motor 32 is
, and start moving the winding head a in the same manner as described above.

Note that the frequency division ratio data output from the data processing device 50 is calculated by the following equation using stored data selected within the data processing device 50.

Frequency division ratio = pulse oscillator 13 per revolution of mandrel 3
Number of transmitted pulses/Code pitch x Number of pulses per one rotation of the pulse motor 32/Pitch of the threaded rod 35 As a result, the moving speed of the winding head a naturally matches the specified code pitch.

At the end of the cord winding, since the rotation time of the mandrel 3 corresponding to the winding width of each model number of the transmission belt is input in advance to the data processing device 50, this is selected and output to the sequence circuit 51.
When the set time period is completed, a rotation stop command is issued from the sequence circuit 51 to the DC motor controller 56, and the rotation of the mandrel 3 is stopped.
Since the pulse transmitter 13 also stops rotating, the pulse transmission stops, the pulse motor driver 59 and the pulse motor 32 also complete their operations, and the movement of the winding head a stops.

Here, the data processing device 50 is provided with a pulse transmitter 1 corresponding to the required rotation amount of the mandrel 3 based on the code winding width and code pitch of each model number of the transmission belt.
A counter is added to calculate the number of pulses transmitted from the pulse transmitter 13 and add up the number of pulses transmitted by the pulse transmitter 13, and when the value of the counter reaches the above calculation result, the DC motor 4 is stopped. Good too.

In any case, when the DC motor 4 stops,
From the sequence circuit section 51, as shown in FIG.
By sending compressed air to the air cylinder 27 through the arm 25 and pulling back the cylinder rod 42,
Pull up the touch pulley 22 and unvulcanized sheet 38.
Pull it further away.

Thereafter, the cord 39 between the unvulcanized sheet 38 and the touch pulley 22 is cut using a cord cutting device (not shown).
Cut the winding head a as shown in Figure 1.
is in the state shown on the right, and the cord terminal portion is gripped by a cord gripping device (not shown).

In this state, the sequence circuit section 51 sends an end signal to the data processing device 50, and at the same time, a reverse signal is sent to the pulse motor 32 via the pulse generator 13, relay 52, and pulse motor driver 59, and the winding is completed. The head a moves to the left in the mandrel axis direction until the standby detection switch 55 is activated, and one operation is completed when the standby detection switch 55 detects the operation.

At this time, in response to the end signal from the sequence circuit section 51, the counter memory n in the data processing device 50 becomes n+1, and preparation for the next cord winding is completed, and the forming order is determined in response to the data request signal from the sequence circuit section 51. This means selecting the (n+1)th data.

According to such a device, a plurality of winding heads a
Each device has a code with different specifications,
By inputting the instruction data including the power transmission belt usage code number etc. according to the forming order in advance, the code is automatically selected and the code is unfinished at the predetermined winding speed, winding width, and winding pitch. It becomes possible to wrap it around a vulcanized sheet, eliminating the need for time and labor such as changing gears to change the wrapping pitch, resulting in a significant improvement in production.

In addition, by moving the winding head a using a DC servo motor, etc., the above effects are achieved, and by using a pulse motor, an inexpensive and accurate winding pitch can be obtained, making it possible to use a power transmission belt with the same specifications. When molding is to be carried out for a relatively long period of time, it is also possible to omit the data processing device 50 and set the required setting data each time using a digital switch or the like.

Next, in the second embodiment shown in FIGS. 6 and 7, the main shaft 106a of the mandrel is connected to the bearing 14.
1, and is connected to a mandrel drive device 142 including a DC motor, and the main shaft 106a
A tacho generator (hereinafter referred to as TG) 143 for detecting the number of rotations and a rotary encoder (hereinafter referred to as RG) 144 for detecting the amount of rotation are attached to this.

On the other hand, the cord winding device 106e is attached to the fixed frame 1.
45, the first moving table 146, and the second moving table 150
The first movable base 146 is assembled movably along the fixed frame 145 in parallel to the axis of the mandrel 105, and is screwed into a female screw (not shown) fixed to the first movable base 146. Threaded rod 147
A traverse drive device 148 including a DC servo motor for rotating is fixed to a fixed frame 145, and a PG 149 is provided for detecting the amount of rotation of the threaded rod 147, that is, the position of the first movable table 146.

The second moving table 150 is attached so as to be movable in the radial direction of the mandrel 105 along the first moving table 146, and a threaded rod 151 is screwed into a female thread (not shown) provided on the second moving table 150. A radial drive device 152 including an AC motor with a brake for rotating the second movable base 150 is fixed to the first movable base 146, and the rotation amount of the threaded rod 151, that is, the second movable base 150
A PG 153 is provided for detecting the position of.

A touch pulley 154 that guides the cord 117 and presses it against the unvulcanized sheet 116 on the mandrel 105 is pivotally connected to the second moving table 150 via a shaft 155 so as to be able to swing in the radial direction of the mandrel 105. a guide roller 158 for guiding the cord 117;
is pivotally attached to the second movable base 150, and a limit switch (not shown) for detecting overstroke of the first and second movable bases 146, 150 is provided.

The part surrounded by the chain line 160 in FIG. 7 is a part of the drive unit, and 161 is the PG153.
The position signal transmitted from the data processing device 104
A controller 162 includes a comparison circuit for position setting data signals outputted from the radial drive unit 152 and controls the AC motor with brake of the radial drive device 152 using signals from the sequence circuit unit 124.
The data processing device 10 calculates the number of pulses transmitted by RG144.
163 is a pulse oscillator for setting the traverse speed of the guide roller 158 except when winding the cord, and 164 is a frequency divider that converts according to the frequency division data output from the sequence circuit 124. A relay 165 selects between the output signal of the frequency divider 162 and the output signal of the pulse generator 163; It includes a comparison circuit for the output speed setting data signal and the speed signal (number of transmitted pulses/second) output from the PG 149, and controls the DC servo motor for the traverse drive device 148 according to the signal from the sequence circuit section 124. 166 is a drive circuit that drives the DC servo motor according to the output signal of the controller 165; 167 is a comparison circuit between the speed signal (voltage) output from the TG 143 and the speed setting data (voltage) output from the data processing device 104; This is a thyristor Leonard type controller that controls the DC motor for the mandrel drive device 142 according to signals from the sequence circuit section 124.

In such a device, when the mandrel 105 is placed at position P ₂₃ , the cord wrapping device 106
As the tail stock 106d begins to move to support the mandrel 105, the sequence circuit section 124 issues a data request signal to the CPU 126 via the input/output interface 138.

At that time, if the second counter memory of the storage device 135 is N, the CPU 126
Select the instruction data with the molding sequence number N from the instruction data stored in 5, and similarly select the specification data corresponding to the instruction data from the specification data, and perform the following calculation. A comparison check is made between the material number Qn of the code 117 used in the specification data and the material number of the code 117 supplied to the cord feeding device 107.

Mandrel rotation speed data x ₁ = a ₁ −b ₁・Lm Radial position data x ₂ = a ₁ −b ₂・Lm Traverse position data x ₃ = a ₃ +b ₃・W・Z Signal data x ₄ = a ₄・Qp However, a ₁ to a ₄ and b ₁ to b ₄ are values that are input in advance as machine data and are determined from the following formula.

a ₁ = k ₁ n _L Lm _H −n _H Lm _L /Lm _H −Lm _L b ₁ = k ₁ n _L −n _H /Lm _H −Lm _L where, k ₁ : Output interface for mandrel rotation speed data Coefficient determined by the specifications of the ace D/A converted TG143 and the DC motor controller 167, Lm _H : Maximum circumference of the transmission belt that can be formed with this forming device, Lm _L : Transmission belt that can be formed with this forming device Minimum circumference of n _H : Mandrel drive device 1 when maximum circumference Lm _H
Optimal rotation speed of the motor for 42, n _L : Mandrel drive device 1 when the minimum circumference Lm _L
Optimum rotation speed of the motor for 42, a ₂ = k ₂ (E ₁ − l ₁ ) ib ₂ = k ₂ / π k ₂ = When the touch pulley 154 moves up and down by unit length
Number of pulse trains transmitted by PG153, E ₁ : Distance between the position P ₂₂ (radial origin) of the lower side of the second moving table 150 when the second moving table 150 is in the standby position and the axis of the mandrel 105, l ₁ : Safety distance to prevent the lower side of the second moving platform 150 (position P ₂₃ ) from coming into contact with the cord 117 wound around the mandrel 105 when winding the cord, a ₃ =k ₃ S ₃ :b ₃ =k ₃ : x ₃ = k ₃ S ₃ k ₃ = Number of pulse trains transmitted by PG 149 when first moving table 146 moves a unit distance, S ₃ = Distance of extra winding at the beginning and end of cord 117, S ₁ : Winding start position P ₂₀ and winding end position of code 117
Distance of P ₂₁ , a ₄ = k ₃ / k ₄ k ₄ = RG14 when mandrel 105 rotates once
4, the CPU 126 sends the above calculation results to each controller 161, frequency divider 162, controller 165, 1
67, the material number comparison check result of code 117 is output to the sequence circuit section 124 via the input/output interface 138, and if the material number comparison results do not match, an error indicator light is turned on and cord winding is not started; If they match, the tail axis 106
As soon as C finishes supporting the mandrel 105, cord winding begins.

That is, first, the second moving table 150 advances in the radial direction, the touch pulley 154 is pressed against the unvulcanized sheet, and the tip of the cord 117 is pressed against the unvulcanized sheet 116.
is at position P ₂₀ .

When the cord crimping is finished, the mandrel 105 rotates at a constant acceleration, and the second movable table 150 corresponding to the rotation of the mandrel 105 starts traversing and starts winding the cord.

When the touch pulley 154 comes a predetermined distance before the position P ₂₁ , the mandrel 105 is decelerated, and when it reaches the position P ₂₁ , it stops and the sequence circuit section 124 is connected to the input/output interface 1 .
Outputs an end signal to the CPU 126 via 38,
This end signal triggers the second counter memory.

Note that the winding head a of the first embodiment (touch pulley 154, shaft 155, lever 15 of the second embodiment) is attached to the second movable table 150 of the second embodiment.
It is also possible to implement a third embodiment in which a plurality of sets (composed of 6, air cylinder 157, and guide roller 158) are provided.

In short, according to the present invention, a mandrel that wraps an unvulcanized sheet around its outer periphery and rotates around an axis, and a mandrel that rolls in contact with the unvulcanized sheet to supply a cord onto the unvulcanized sheet. In a power transmission belt forming device equipped with a cord feeding machine for wrapping the cord and a movement mechanism driven by a motor to move the cord feeding machine in the axial direction of the mandrel, a pulse is transmitted in conjunction with the rotation of the mandrel. a transmitter and
The present invention is industrially extremely useful because it provides a high-performance power transmission belt forming device that saves labor by including a control circuit that controls the movement of the cord feeding machine based on the output of the pulse transmitter. .

[Brief explanation of the drawing]

FIG. 1 is a side view showing the first embodiment of the present invention, FIG. 2 is a sectional view taken along - in FIG. 1, FIG. 3 is a horizontal sectional view taken along - in FIG. Second
5 is a sectional view showing the state in which the touch roller is separated from the mandrel; FIG. 5 is a block diagram showing the control circuit of the cord supply mechanism of FIG. 1;
FIG. 6 is a side view showing the second embodiment of the present invention;
This figure is a block diagram showing the control circuit of the code supply mechanism in FIG. 6. 1... Head stock housing, 2... Tail stock housing, 3... Mandrel, 4...
...DC motor, 5, 6...Pulley, 7...Timing belt, 8...Bearing, 9...Main shaft, 13...
Pulse transmitter, 14... Strut, 15... Winding head support bracket, 16... Rail, 17... Bolt, 18... Bolt, 19... Strut, 20...
Bolt, 21... Bolt, 22... Tatsuchi pulley, 23... Pin, 24... Cord guide, 25
... Arm, 25a ... Bracket, 26 ... Pin, 27 ... Air cylinder, 28, 29 ... Guide roller, 30 ... Nut, 31 ... Bracket, 32 ... Pulse motor, 33 ... Bolt, 3
4...Cup ring, 35...Threaded rod, 36...
Bearing, 37...Cam follower, 38...
Unvulcanized sheet, 39...cord, 40...hose, 41...hose, 42...cylinder rod,
50...Data processing device, 51...Sequence circuit section, 52...Relay, 53...Pulse transmitter,
54...Digital switch, 55...Switch,
56... Controller, 57... Relay, 58...
...Frequency divider, 59...Pulse motor driver, 10
4...Data processing device, 105...Mandrel,
106... Cord winding device, 106a... Main shaft,
106b...Head stock, 106c...Tail shaft, 106d...Taste stock, 106e...
... Cord winding device, 116 ... Unvulcanized sheet, 11
7... Code, 123... Operating device, 124...
Sequence circuit section, 135...Storage device, 138
...Input/output interface, 141... Bearing, 142... Mandrel drive device, 143...
Tacho generator (TG), 144... Rotary encoder (RG), 145... Fixed frame, 1
46...First moving table, 147...Threaded rod, 14
8...Traverse drive device, 149...PG, 1
50...Second moving table, 151...Threaded rod, 15
2...Radial drive device, 153...PG, 15
4...Tatsuchi pulley, 155...Shaft, 156...
Lever, 157... Air cylinder, 158... Guide roller, 160... Drive unit, 1
61... Controller, 162... Frequency divider, 16
3...Pulse transmitter, 164...Relay, 165
... Controller, 166 ... Drive circuit, 167
... Controller, a ... Winding head.

Claims (1)

[Claims] 1. A mandrel that wraps an unvulcanized sheet around its outer periphery and rotates around an axis, and a cord supply that rolls into contact with the unvulcanized sheet and supplies a cord onto the unvulcanized sheet and wraps it. A power transmission belt forming apparatus includes a moving mechanism driven by a motor to move the cord feeding machine in the axial direction of the mandrel, a pulse transmitter that emits pulses in conjunction with rotation of the mandrel, and a pulse generator that transmits pulses in conjunction with rotation of the mandrel. A power transmission belt forming device comprising: a control circuit that controls movement of a cord feeding machine based on the output of a transmitter.