JP3162342U - Unloader - Google Patents

Abstract

An electric unloader that holds an object and moves it to another place, is small, inexpensive, quiet, and uses less energy. An electric motor that is a drive source, a first moving unit that is driven by the electric motor and moves linearly, a pair of pulleys disposed in the first moving unit, and the pair of pulleys. A belt 25 that engages with a pulley; and a second moving portion that is driven by the belt and moves linearly, and the second moving portion performs a linear movement relatively in parallel with the first moving portion. Then, a part of the belt is fixed to the unloader to constitute the unloader. [Selection] Figure 2

Description

The present invention relates to a motor-driven electric take-out machine that holds an object and moves to another place. Further, the present invention relates to a holding device used for the take-out machine and holding an object in between.

2. Description of the Related Art Conventionally, as an unloader that holds an object and moves to another place, an unloader that is pneumatically driven using a compressor is known. That is, an air pressure of a predetermined pressure is generated by a compressor, and a drive device such as an air cylinder is driven by this air pressure to operate the take-out machine.

However, the unloader using the compressor device is large as a whole system, and the compressor device is necessary, so that the cost is high. Further, since the compressor device is always in an operating state even when the unloader is stopped, useless energy is used. In addition, when operating the unloader, it creates an environment that is not necessarily quiet because it emits the operating sound of the air valve. Thus, the take-out machine using the compressor device is not necessarily suitable for a production site that uses a small and narrow space. In addition, wasteful energy was used, which was not necessarily appropriate for the global environment.

JP 2003-231130 A

The present invention has been made to solve the above-described problems. To provide a take-out machine and a holding device for the take-out apparatus that are small, inexpensive, quiet, and use less energy by a motor drive without using an air compressor. With the goal.

In order to achieve the above object, an unloader of the present invention includes an electric motor that drives the operation of the unloader, a first moving unit that is driven by the electric motor and moves linearly, and the first moving unit. A pair of pulleys disposed on the belt, a belt that engages with the pair of pulleys, and a second moving unit that is driven by the belt and moves linearly, wherein the second moving unit is the first moving unit. A take-out machine characterized in that the belt moves in a straight line relatively in parallel with the part, and a part of the belt is fixed to the take-out machine.

The pulley may use a timing pulley, and the belt may use a timing belt.

The unloader may further include a holding device that holds the object in between, and the holding device may be attached to the second moving unit.

In order to achieve the above object, a pinching device of the present invention comprises a pair of pinching levers that are rotatably supported, pinch the object on one side of the center of rotation, and are driven on the other side, A spring that urges the holding lever to rotate, a wedge member that has a female screw hole and whose rotation about the axis is restricted and moves in the axial direction; A motor having a male screw that fits into a female screw hole as a part of the rotation shaft, and by driving the forward rotation of the motor, the wedge member is advanced to drive the holding lever to hold the object, The wedge member is retracted by reversely rotating the motor, and the object is released by restoring the holding lever by a spring force.

The holding device further includes a motor control circuit that controls a current value of the motor, and the motor control circuit detects an excessive current value that flows when the holding lever holds an object to supply current. You may make it stop.

The motor control circuit may flow a predetermined current value after detecting an excessive current value that flows when the holding lever holds the object.

The pinching device further includes a pair of contacts disposed on the pinching side of the pinching lever and in electrical contact when the pinching lever is closed, and the pinching lever is closed without sandwiching an object. Sometimes the motor control circuit may detect the contact of the contacts to stop or reverse the motor.

The holding device further includes a stopper that prevents the wedge member from moving, and the stopper prevents the wedge member from moving backward after the wedge member moves backward and leaves the pinching lever. May detect an excessive current flowing in the motor current and stop the rotation of the motor.

The pinching device is characterized in that the lead angle of the screw is an angle that keeps the friction of the screw so that the wedge member and the screw of the motor rotating shaft do not loosen even after the motor stops.

In the present invention, as described above, it is a motor driven take-out machine that does not use an air compressor, and the linear movement is performed using only one motor, so it is small, inexpensive, quiet, and uses energy. There are few effects. Furthermore, since the holding device used for the unloader is a device driven by a motor, the same effect is obtained.

FIG. 1 is a front view of an unloader according to the present invention. FIG. 2 is a perspective view showing an outline of the straight movement mechanism of the unloader according to the present invention. FIG. 3 is a front view illustrating an operation in which the rectilinear movement mechanism unit moves vertically, as viewed from the direction A in FIG. FIG. 4 is a perspective view showing an outline of the holding device used in the unloader according to the present invention. FIG. 5A is a front view showing the structure and operation of the holding device of FIG. FIG.5 (b) is sectional drawing shown by the arrow of Fig.5 (a). Fig.6 (a) is a front view which shows the area | region of the expansion part of the clamping apparatus of FIG. FIG. 6B is an enlarged view of a portion A in FIG. FIG.6 (c) is an enlarged view of the B section of Fig.6 (a).

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of an unloader 1 according to the present invention. FIG. 2 is a perspective view showing an outline of a straight movement mechanism that moves mainly vertically in the unloader 1 of FIG. FIG. 3 is a front view illustrating an operation in which the rectilinear movement mechanism unit of FIG. 2 moves linearly.

In FIG. 1, the whole unloader 1 is configured on a base stage 11. A base 13 is disposed on the support 11 fixed to the base stage 11. The motor 12 disposed on the base 13 is a driving source for rotating the device portion on the left side of the base 13 around the X axis when the X axis extending to the left through the base 13 is assumed. Guide bars 4 and 5 are arranged to the left from the base 13, and the horizontal slide unit 21 (shown in FIG. 2) moves in the horizontal direction as guided by the guide bars 4 and 5. A unit substrate 6 is fixed to the horizontal slide unit 21. The unit substrate 6 includes a linear movement mechanism, and a motor 7, a gear box 8, a vertical rod 9, a holding device 101, and the like are disposed as main components. The rotational force of the motor 7 is transmitted via the gear box 8 so that the vertical rod 9 finally moves straight forward. A code cover 15 is disposed on the top of the vertical rod 9, and a code cover 14 is disposed with respect to the unit substrate 6. The horizontal slide unit 21 is interlocked with the timing belt 3 driven by the motor 2, and is moved in the horizontal direction when the motor 2 rotates.

In FIG. 2, the bearing built in the horizontal slide unit 21 is fitted with the guide bars 4 and 5 to guide the horizontal slide unit 21 in the horizontal direction. A unit substrate 6 is fixed to the horizontal slide unit 21. The vertical slider 23 is attached to the unit substrate 6 via a slide bearing (not shown), and is slidable in the vertical direction (Y direction) in FIG. The vertical slider 23 is restricted from moving in a direction perpendicular to the sliding surface with the unit substrate 6.

Timing pulleys 24 and 28 are rotatably arranged on the side surface of the vertical slider 23, and the timing pulleys 24 and 28 are engaged with and engaged with the timing belt 25. A fixing fastener 26 is attached in the middle of the timing belt 25, and the fixing fastener 26 is disposed so as to fix the timing belt 25 to the unit substrate 6. At this time, the vertical slider 23 is not restricted from moving in the vertical direction (Y direction). When the vertical slider 23 tries to move in the vertical direction (Y direction), the position of the timing belt 25 is fixed, but since the timing pulleys 24 and 28 rotate, the vertical slider 23 moves in the vertical direction (Y direction). Is configured to be possible.

A vertical rod 9 is arranged on the surface of the vertical slider 23 so as to be slidable in the vertical direction (Y direction) via a slide bearing (not shown). That is, the vertical rod 9 is slidable in the vertical direction (Y direction) on the surface of the vertical slider 23 and is restricted from moving in the direction perpendicular to the sliding surface of the vertical slider 23 and the vertical rod 9. ing.

A timing belt 29 is attached to the vertical slider 23, and both ends of the timing belt 29 are fixed to the vertical slider 23 with screws. A part of the timing belt 29 is lifted from the surface of the vertical slider 23 as shown in FIG. 2, and the timing belt 29 and the timing pulley 32 are engaged with each other in this part. In the vicinity of the timing pulley 32, a pressing pin 30 that presses the timing belt 29 is disposed to ensure the engagement between the timing pulley 32 and the timing belt 29. The pulley shaft 31 of the timing pulley 32 is connected to the gear box 8, and the gear box 8 is connected to the motor 7 by changing the axial direction by 90 °. When the motor 7 rotates, the rotational force is transmitted to the timing pulley 32 via the gear box 8, whereby the timing belt 29 receives the force in the vertical direction (Y direction) and moves the vertical slider 23 in the vertical direction. .

A fixed fastener 27 is attached to the side surface of the vertical rod 9, and the fixed fastener 27 is fixed in the middle of the timing belt 25. Accordingly, the vertical rod 9 and the timing belt 25 are configured to operate integrally. When the motor 7 is rotated, the vertical slider 23 is moved in the vertical direction (Y direction) as described above. When the vertical slider 23 is moved in the vertical direction, the timing pulleys 24 and 28 also try to move in the vertical direction. Since the timing belt 25 is fixed to the unit substrate 6 by the fixing fastener 26, the timing pulleys 24 and 28 are rotated, and the vertical rod 9 is moved in the vertical direction so that the timing belt 25 is extended in the vertical direction. .

A holding device 101 is disposed below the vertical rod 9, and the holding device 101 operates to release the object after gripping the object and moving it to another place.

The operation of the linear movement mechanism unit shown in FIG. 2 will be described with reference to FIG. When the motor 7 (not shown) rotates, the rotational force of the motor 7 is transmitted to the pulley shaft 31 via the gear box 8 (not shown) to rotate the timing pulley 32. Consider a case where the timing belt 32 receives an upward force as the timing pulley 32 rotates. The upward force applied to the timing belt 29 transmits the upward force to the vertical slider 23 as described in FIG. Since the timing belt 25 disposed on the side surface of the vertical slider 23 is fixed to the unit substrate 6 by the fixing fastener 26 at the right side portion thereof, the vertical slider 23 receiving the upward force causes the timing pulleys 24 and 28 to move. While rotating and operating the left portion of the timing belt 25 to move upward, the timing belt 25 moves upward. Since the left portion of the timing belt 25 is fixed to the vertical rod 9 by the fixing fastener 27, when the left portion of the timing belt 25 moves upward, the vertical rod 9 slides on the surface of the vertical slider 23. Move up.

Thus, since the vertical rod 9 moves relatively upward on the surface of the vertical slider 23 that is moving upward, the movement distance of the vertical rod 9 is twice the movement distance of the vertical slider 23. Become. Further, the time required for the movement is half that of the case where the same distance is moved only by the vertical slider 23, so that the operation speed is doubled.

4 is a perspective view for explaining the outline of the holding device used in the unloader according to the present invention, FIG. 5 (a) is a front view for explaining the structure and operation of the holding device in FIG. 4, and FIG. 5 (b). Is a cross-sectional view of the part cut by the arrow in FIG. 5 (a), FIG. 6 (a) is a diagram showing A part and B part of the holding device in FIG. 4, and FIG. 6 (b) is FIG. ) Is an enlarged view of part A, and is a diagram for explaining an electrical contact installed on the holding side of the holding lever of the holding apparatus, and FIG. 6C is an enlarged view of part B in FIG. It is a figure explaining the stopper which prevents a movement of the wedge member of a holding device.

The holding device 101 shown in FIG. 4 can hold an object by closing the holding levers 102 and 103. The motor 14 at the top of the holding device 101 is a driving source for closing the holding levers 102 and 103. The motor 114 is connected to a motor control circuit 125 via a motor cord 121. The motor control circuit 125 is connected via a contact cord 122 to contacts 115 and 116 arranged on the holding side of the holding levers 102 and 103 described in FIG. The motor control circuit 125 is supplied with energy by a power supply 126.

In FIG. 5A, the holding levers 102 and 103 are rotatably supported by the rotating shafts 104 and 105, respectively. The holding levers 102 and 103 hold the object at the lower part (pinch side) around the rotation shafts 104 and 105 and are driven by the upper part (drive side). One end of the torsion spring 106 is locked to the arm portion of the holding lever 102, and the other end is locked to the rotating shaft 105 to urge the holding lever 102 to apply a rightward rotational force. . One end of the torsion spring 107 is locked to the arm portion of the holding lever 103 and the other end is locked to the rotating shaft 104 to urge the holding lever 103 to apply a leftward rotational force. . The sandwiching levers 102 and 103 are urged by the rotational force in the right direction and the left direction, respectively, and are pressed against each other on the contact surface 108 of the sandwiching levers 102 and 103. The motor 114 is fixed to the housing 113. The motor rotating shaft 112 of the motor 114 has a male screw portion, and the wedge member 111 has a female screw portion and is fitted to each other. The wedge member 111 has a slope, and this slope is in contact with the sliding surfaces 109 and 110 of the holding levers 102 and 103, respectively.

When the motor 114 rotates in the forward direction in response to a command from the motor control circuit 125, the wedge member 111 tries to rotate by the frictional rotational torque transmitted from the male screw portion of the motor rotating shaft 112. As shown in FIG. The rotation is prevented by the inner wall of the casing 113. Therefore, the wedge member 111 receives a downward thrust force in the direction of the female screw central axis and moves downward. When the wedge member 111 moves downward, the inclined surface of the wedge member 111 pushes the sliding surfaces 109 and 110 of the holding levers 102 and 103, respectively, and rotates the holding levers 102 and 103, thereby holding the holding lever. Hold the object by moving the side in the closing direction.

If the holding side of the holding levers 102 and 103 pinches the object, the rotating shaft 112 of the motor 114 stops because the object cannot be rotated any further. At this time, an excessively large current flows through the motor, but the motor control circuit 125 detects the excessive current and stops supplying the motor current, so that the motor is not damaged. A method of stopping the motor current by detecting the excessive current is performed by a method easy to those skilled in the art. Alternatively, instead of stopping the motor current, a constant current that is safe may be supplied, so that the object can be held more securely.

When the object sandwiched between the holding levers 102 and 103 is released, the motor control circuit 125 applies a reverse current to the motor 114 to reverse it. When the motor 114 rotates in the reverse direction, the wedge member 111 tries to rotate with the transmitted frictional torque, but is prevented from rotating by the inner wall of the housing portion 113. For this reason, the wedge member 111 receives upward thrust force in the direction of the female screw central axis and moves upward. When the wedge member 111 moves upward, the driving side of the levers 102 and 103 that have been pressed so far moves in the closing direction by the spring force of the torsion springs 106 and 107, respectively, while the holding side of the levers 102 and 103 opens. It moves to. Thus, the object that has been held is released from the holding side of the levers 102 and 103.

On the other hand, the holding levers 102 and 103 may be closed without holding the object. In this case, it is necessary to reverse the motor 114 and move the wedge member 111 upward to open the holding levers 102 and 103. For that purpose, the state where the holding levers 102 and 103 are closed is detected and transmitted to the motor control circuit 125, and the motor control circuit 125 may reverse the current by flowing the current in the reverse direction.

FIG. 6B is an enlarged view of the holding levers 102 and 103 on the holding side. In FIG. 6B, a contact 115 is disposed on the holding side of the holding lever 102. The upper surface of the contact 115 is structured to be lower than the upper surface of the holding lever 102 (the surface where the holding lever 102 and the holding lever 103 are in contact) by a predetermined value. When the holding lever 102 is made of a conductive material, the contact 115 is attached to the holding lever 102 in an electrically insulated manner.

A contact 116 is disposed on the holding side of the holding lever 103, and the upper surface of the contact 116 is a predetermined value from the upper surface of the holding lever 103 (the surface where the holding lever 102 and the holding lever 103 are in contact). It has a protruding structure. When the holding lever 103 is made of a conductive material, the contact 116 is attached to the holding lever 103 in an electrically insulated manner.

A contact cord 122 is coupled to the contacts 115 and 116 and connected to the motor control circuit 125. When the holding levers 102 and 103 are closed, the contact 115 and the contact 116 come into contact and become electrically conductive, and inform the motor control circuit 125 that the holding levers 102 and 103 are closed.

Even when the object of the conductive material is held, the upper surface of the contact 115 is at a position lower than the upper surface of the holding lever. Therefore, the contact 115 does not contact the object, and an incorrect close signal is sent to the motor control circuit 125. There is no telling.

FIG. 6C shows the driving side of the holding levers 102 and 103, the wedge member 111, the motor rotating shaft 112, and the like. As described above, when the contact 115 and the contact 116 are conducted and a closing signal is sent to the motor control circuit 125 to reverse the motor, the wedge member 111 moves upward to move away from the holding levers 102 and 103 and further move. If it continues, it will hit the stopper 113a inside the housing 113, and no more can be raised. At this time, an excessive current flows through the motor. However, the motor control circuit 125 detects the excessive current, stops supplying the current to the motor 114, stops the rotation of the motor 114, and stops the lifting of the wedge member 111. It is easy for those skilled in the art to detect the excessive current and stop the supply of current to the motor 114.

The take-out machine of the present invention is not driven by aerodynamic force using a compressor device but handles an object by a motor electric force, so that it can be used easily even in small-scale production. For example, it can be used as a take-out machine for an injection molding machine.

DESCRIPTION OF SYMBOLS 1 Unloader 2 Motor 3 Belt 4 Guide bar 5 Guide bar 6 Unit board 7 Motor 8 Gear box 9 Vertical rod 10 Post 11 Base stage 12 Motor 13 Base 14 Code cover 15 Code cover 21 Horizontal slide unit 23 Vertical slider 24 Timing pulley 25 Timing belt 26 Fixed clamp 27 Fixed clamp 28 Timing pulley 29 Timing belt 30 Holding pin 31 Pulley shaft 32 Timing pulley 101 Nipping device 102 Nipping lever 103 Nipping lever 104 Rotating shaft 105 Rotating shaft 106 Torsion spring 107 Torsion spring 108 Lever contact surface 109 Sliding surface 110 Sliding surface 111 Wedge member 112 Motor shaft 113 Housing 113a Stopper 114 Motor 115 Contact 116 Contact 121 Motor code 122 Contact code 125 Motor control Control circuit 126 Power supply

Claims (10)

An unloader that holds an object and moves to another location,
An electric motor that is a drive source when the unloader operates, and a first moving unit that is driven by the electric motor and moves linearly;
A pair of pulleys disposed in the first moving unit;
A belt engaged with the pair of pulleys;
A second moving unit that is driven by the belt and moves straight.
The unloading machine, wherein the second moving unit moves linearly and relatively in parallel with the first moving unit, and a part of the belt is fixed to the unloader. The unloader according to claim 1, wherein the pulley is a timing pulley, and the belt is a timing belt. It further comprises a holding device that holds the object in between,
The unloader according to claim 1 or 2, wherein the holding device is attached to the second moving part. A holding device for holding an object in between,
A pair of pinching levers supported rotatably and pinching the object on one side of the rotating shaft and driven on the other side;
A spring that urges the holding lever to rotate,
A wedge member that drives the pinching lever by moving in the direction of the rotation axis;
A motor for driving the wedge member,
The wedge member is moved forward by rotating the motor forward to drive the pinching lever to pinch the object, and the motor is rotated backward to move the wedge member backward to move the pinching lever. A holding device that is restored by a spring force to open an object. The wedge member has a female screw hole and is restricted from rotating about its axis, and the rotation shaft of the motor has a male screw portion that fits into the female screw of the wedge member, and the wedge member is made to rotate by rotating the motor. 5. The holding device according to claim 4, wherein the holding device is moved forward or backward. A motor control circuit for controlling the current of the motor;
5. The pinching device according to claim 4, wherein the motor control circuit detects an excessive current that flows when the pinching lever pinches an object and stops supplying current. A motor control circuit for controlling the current of the motor;
5. The holding apparatus according to claim 4, wherein the motor control circuit passes a predetermined current value after detecting an excessive current flowing when the holding lever holds the object. Further comprising a pair of contacts disposed on the holding side of the holding lever and in electrical contact when the holding lever is closed;
8. The motor control circuit detects contact of the contact and stops or reverses the motor when the holding lever is closed without pinching an object. Pinching device. A stopper for preventing movement of the wedge member;
The stopper prevents the wedge member from retracting after the wedge member retracts and leaves the pinching lever. At this time, the motor control circuit detects an excessive current flowing through the motor and stops the rotation of the motor. 9. The holding device according to claim 6, wherein the holding device is a pinch device. 6. The lead angle of the screw is an angle that maintains friction of the screw so that the screw that couples the wedge member and the motor rotating shaft does not loosen after the motor stops. , 6, 7, 8, or 9.

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