JP3120538B2 - Transfer device for round bar-shaped workpieces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device for a round bar-shaped work, and more particularly to a rod-shaped work which is engaged at predetermined intervals in a tooth groove of a double-toothed timing belt which is driven to travel from a supply position to a discharge position. Then, during the transfer process, the rod-shaped workpieces respectively locked in the tooth grooves of the timing belt are stopped by the detection device and the reversing device arranged corresponding to the rod-shaped workpieces, and each step for the rod-shaped workpieces can be sequentially executed. The present invention relates to a device for transporting a stick-shaped work.

[0002]

2. Description of the Related Art In general, when a workpiece having a round bar shape is transported, a pallet equipped with a jig for positioning and holding this type of workpiece in a stable state is used, or the workpiece is aligned and transported by a parts feeder. Transport device is used.

[0003]

However, in the case of transporting by using the transporting device as in the former case, since a work mounting jig is used for the pallet, a driving source for opening and closing the jig is used. The equipment itself becomes large and complicated, and a positioning device for accurately positioning each pallet at each stroke position arranged in the pallet transport path is required, so that the manufacturing cost becomes expensive, and in the latter case, In the case of using a parts feeder as described above, since the work is conveyed by vibration, there are many difficulties such as the outer periphery being easily damaged due to contact between the works during the conveyance.

Accordingly, an object of the present invention is to lock a round bar-shaped work at predetermined intervals in a tooth groove of a double-toothed timing belt which is driven to travel from a supply position to a discharge position, so that each of the timing belts is moved during a transport stroke. By sequentially positioning and stopping the rod-shaped workpieces locked in the tooth spaces at equal intervals in the detection device and the reversing device arranged to correspond to this, each step for the rod-shaped workpieces is sequentially executed, thereby configuring
An object of the present invention is to provide a transfer device for a round bar-shaped work in which the positioning of the work is accurate and easy, the structure of the transfer device is simple, and the transfer time can be easily reduced.

[0005]

In order to achieve the above-mentioned object, a round bar-shaped workpiece having a workpiece attitude detecting device and a workpiece reversing device provided during a process of transporting the workpiece from a supply position to a discharge position is provided. In the transfer device, the two-toothed timing belt stretched and driven between the drive timing pulley and the driven timing pulley and the rod-shaped workpiece to be locked in the tooth groove of the timing belt transferred and positioned at the supply position are individually A supply device for separating and supplying
A detecting device movably provided with respect to the rod-shaped work positioned to detect the shape of the end of the work supplied by the supply device and locked and conveyed in the tooth groove of the timing belt, and detected by the detecting device; A work reversing device that sucks and grips a bar-shaped work in a tooth groove and drives it to reverse when the end shape of the bar-shaped work is abnormal, and transports the bar-shaped work that has passed through the work reversing position to discharge it A discharge device is provided so as to be capable of moving forward and backward with respect to the positioned bar-shaped work, and the devices are arranged near the timing belt with both teeth at equal intervals along the transport direction.

In this case, the supply device is provided with a cylindrical transport path for continuously transporting a round bar-shaped workpiece in the axial direction, and a feeder that is movable forward and backward in a direction perpendicular to the transport path, and is provided at a predetermined position. A shielding member having an insertion hole through which a work can pass, and a pressing member slidably supported by the shielding member and elastically pressed and urged toward the cylindrical conveyance path to move synchronously with the shielding member. When the shielding member is at the retreat position, the bar-shaped work is prevented from being transported, and when the shielding member stops moving to the advanced position and the insertion hole and the transport path are aligned, the subsequent workpiece is pressed and held by the pressing member. It is preferable that only the bar-shaped workpiece at the position is configured to pass through the workpiece.

[0007]

According to the transfer device for a round bar-shaped work according to the present invention, the round bar-shaped work is locked at predetermined intervals in the tooth groove of the double-toothed timing belt driven to travel from the supply position to the discharge position. During the transporting process, the rod-shaped workpieces, each of which is locked at regular intervals in the tooth groove of the timing belt, are sequentially positioned and stopped by a detection device and a reversing device arranged correspondingly to execute the respective steps on the rod-shaped workpiece. With this configuration, the positioning of the work is accurate and easy, the structure of the transfer device is simple, and the transfer time can be easily reduced.

[0008]

Next, an embodiment of the mold clamping device according to the present invention will be described.
This will be described in detail below with reference to the accompanying drawings. FIG. 1 is an overall cross-sectional view showing one embodiment of a round bar-shaped workpiece transfer device according to the present invention, and FIG. 2 is a view taken in the direction of arrows AA in FIG. In the figure, reference numeral 10 indicates a drive timing pulley,
The drive timing pulley 10 is fixed to an output shaft 15 of a pulse motor 14 fixed to the bottom of one end of a base plate 12, and a driven timing pulley 18 is rotatably supported by a bearing on a support shaft 16 fixed to the other end of the base plate 12. Supported.

Between these timing pulleys 10 and 18, a double-toothed timing belt 20 is stretched so that the tooth grooves thereof are directed perpendicular to the base plate 12, and the pulse motor 1 is rotated.
FIG. 2 shows the tooth grooves of the timing belt 20 driven by
The workpieces W (hereinafter, referred to as workpieces) supplied from a workpiece supply device 30 as shown in FIG.
It is configured to be transported to

As described above, the work supply device 30, the work posture detecting device 32, the work reversing device 34, and the work discharge device 36 are provided in the vicinity of the side edge of the driven double-toothed timing belt 20 along the belt running direction. The timing belt 20 is disposed at regular intervals corresponding to the number of tooth grooves.

First, the work supply device 30 disposed at the work supply position 22 forms a transfer hole 40 connected to the flexible tube 38 to guide and supply the work W in a state where the work W is aligned by a parts feeder (not shown). Block 42
And a projecting portion is provided forwardly of a moving body 44 provided to be able to advance and retreat by a driving source (a fluid pressure cylinder or the like) (not shown) in a direction orthogonal to the transport hole 40 and has the same diameter as the transport hole 40 at a predetermined position. A shielding member 48 having a slightly larger diameter through-hole 46 formed thereon, and a compression spring 52 supported on the upper part of the shielding member 48 so as to be slidable in the same direction as the workpiece W positioned in the transport hole 40. And a pressing member 50 that presses and urges.

FIG. 3 is a cross-sectional view of a main part of the work posture detecting device 32. FIG. 3A shows a normal posture in which a concave portion formed on an end face of the work W in an upright position is located at an upper portion. FIG. 3B is a cross-sectional view illustrating a state in which the presence of the workpiece W is detected, and FIG. 3B is a cross-sectional view illustrating a state in which the posture of the workpiece W is detected to be an abnormal posture. 2 and 3
In the above, a work posture detection device 32 is disposed at a work posture detection position 24 set at a position separated from the work supply position 22 by a predetermined distance (corresponding to the sixth tooth groove from the work supply position 22). The posture detection device 32
The timing belt 2 positioned at the detection position 24
The housing 56 is provided so as to be able to advance and retreat on the same axis as the workpiece W retained in the 0 tooth groove, and has an air introduction hole 54 formed therein, and is inserted into the air introduction hole 54 at the tip of the housing 56. A detection sleeve 5 having a small-diameter detection hole 60 communicating with the air introduction hole 54 and opening to the outside at the end side surface;
8 is comprised.

Next, the work reversing device will be described with reference to FIG. That is, FIG. 4 shows a BB cross-sectional view of FIG.
A work reversing device 34 is provided at a work reversing position 26 which is set at a position separated from the work posture detecting position 26 by a predetermined distance (the same number of the tooth grooves of the timing belt 20 as described above). A rotary actuator 66 fixed to the front side surface of a base 64 provided vertically on the base 12 and a bearing 70 held at a lower part of the base 64 are rotatably supported by a shaft and penetrate an air flow hole 73 in a shaft center. Groove 74 into which the workpiece W can be inserted at the tip
An opening of the air flow hole 73 is formed at the bottom of the concave groove 74, and a rotary joint 76 is formed at the rear end to communicate with the air flow hole 73.
And a drive timing pulley 80 fixed to one output shaft 68 of the rotary actuator 66 is fixed to an end of the reverse shaft 72 so as to be located in the same phase as the reverse shaft 72 to which an L-shaped joint 78 is connected. Driven timing pulley 8
2 and a timing belt 8 stretched between the timing pulleys 80 and 82 to invert the reversing shaft 72 by 180 °.
And 4. In this case, the end of the reversing shaft 72 where the concave groove 74 is formed is set to a position extremely close to the work W positioned at the work reversing position 26 by being locked in the tooth groove of the timing belt 20.

Further, as shown in FIG. 2, the back surface of the timing belt 20 is guided by a guide plate 86, and the side surface of the work W conveyed upright while being locked in the tooth groove of the timing belt 20 has a holding plate. The upright work W is guided by the base plate 88 and the bottom of one end of the upright work W is slidably guided and held on the upper surface of the base plate 12. It is preferable that the sliding surfaces of the plates 86, 88 and 12 for restricting and guiding the outer periphery of the work W to be conveyed are made of a material such as a synthetic resin having low sliding resistance.

The transport device for a round bar-shaped work thus constructed operates as follows. First, in FIGS. 1 and 2, a round bar-shaped workpiece W which is continuously transported by a parts feeder (not shown) passes through the flexible tube 38 and is transported into the transport hole 40 of the block 42. ,
The state-of-the-art work W is a shielding member 48 of the work supply device 30.
As a result, the downward movement is prevented, and the sheet is stacked in the transport hole 40 in the axial direction while being held by the downward movement.

In this state, when the moving body 44 is moved forward by the action of a driving source (not shown), the through hole 46 of the shielding member 48 is moved.
Moves to the position of the conveying hole 40, and these holes 46, 40
At the same time, the pressing member 50 also moves forward, and the side of the next succeeding work W is elastically pressed and supported by the tip of the pressing member 50, so that only the foremost work W passes and positioning is stopped in advance. Timing belt 20
Is dropped and locked in the tooth space.

Next, the pulse number of the timing belt 20 set in advance by the pulse motor 14 (corresponding to the sixth tooth groove)
When moved, the workpiece W is locked in the tooth space and the workpiece W is stopped at the workpiece attitude detection position 24 (see FIG. 2). This position 2
In 4, the housing 56 of the work attitude detecting device 32 coaxial with the work W moves down, and the detection sleeve 58 at the tip of the housing 56 contacts the end of the work W. In this case, as shown in FIG. 3A, when a concave portion is located at the upper end of the work W, when the tip of the detection sleeve 58 enters the concave portion 62, the detection sleeve 58 communicates with the tip through the air introduction hole 54. When the compressed air is ejected through the detection hole 60, the recess 62 causes the detection hole 60 to send out the compressed air.
Is closed, the air pressure in the air introduction hole 54 increases.

Therefore, by detecting the increased air pressure with, for example, a pressure switch or the like, it is confirmed that the posture of the work W is in a normal state. In contrast, FIG.
As shown in (b), when the workpiece W is in an abnormal position where no concave portion is formed at the upper end, the detection hole 60 is not closed and the supplied compressed air is directly discharged to the outside. The air pressure in the hole 54 does not change, and the operation of the timer moves the housing 56 upward to complete the detection of the posture of the workpiece W.

Next, the timing belt 20 is moved by the same distance (corresponding to the sixth tooth space) and the workpiece W locked in the tooth space is moved.
Is positioned at the work reversing position 26, it is determined whether or not the operation of the work reversing device 34 is possible based on the detection signal output from the work posture detecting device 32 in the previous step. When the posture of the work W is normal, the reversing operation is not performed and the timer is operated after a predetermined time has elapsed, and the work W is passed.
In the case where the posture is abnormal, the workpiece is locked in the tooth groove of the timing belt 20 by applying a negative pressure through the air flow hole 73 opened at the bottom of the concave groove 74 at the end of the reversing shaft 72 shown in FIG. W is sucked and held in the concave groove 74. Then, the rotary actuator 66 is started to rotate the reversing shaft 72 by 180 degrees.
After being rotated to correct the posture, the compressed air is sent out from the opening at the bottom of the groove 74 to lock the work W inside the groove 74 again in the tooth groove of the timing belt 20.
Subsequently, the work W is fixed by the timing belt 20 in a state of being locked in the tooth space by a predetermined number of pulses (the same distance as above).
After being moved and transferred to the work discharge position 28 in the final step, the discharge device 3 disposed coaxially above this position
The compressed air delivered from 6 is transferred to the next device through a discharge tube 35 from a discharge hole formed in the base plate 12.

As described above, since the workpieces W are locked at regular intervals in the tooth spaces of the timing belt 20, a predetermined number of pulses (six tooth spaces) are required to transfer the timing belt 20 to each process by the pulse motor 14. The round bar-shaped workpiece W corrected to the normal posture can be sequentially discharged from the transfer device every time the vehicle is moved, and the transfer time can be easily reduced. In this embodiment, the example in which the timing belt 20 travels in the vertical state has been described. However, it is needless to say that a configuration in which the double-toothed timing belt is transported in the horizontal state can be adopted.

[0021]

As is apparent from the above-described embodiment, the double-toothed timing belt stretched between the driving timing pulley and the driven timing pulley and driven to travel according to the conveying device for a round bar-shaped work of the present invention. And a supply device that separately supplies the rod-shaped workpieces to be locked in the tooth grooves of the timing belt conveyed and positioned at the supply position, and a work supplied by the supply device and conveyed in the tooth grooves of the timing belt. A detection device provided so as to be able to advance and retreat with respect to a rod-shaped work positioned to detect the shape of the end;
When the end shape of the bar-shaped work detected by the detecting device is abnormal, the bar-shaped work in the tooth space where the bar-shaped work is positioned is sucked and gripped, and the bar-shaped work is passed through the work reversing position. With a discharge device provided to be able to move forward and backward with respect to the bar-shaped work positioned to discharge the work, the positioning of the work is accurate and easy, the structure of the transfer device is simple, and the transfer time can be shortened easily. It has excellent effects such as can be achieved.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the spirit of the present invention. It is.

[Brief description of the drawings]

FIG. 1 is an overall cross-sectional view showing one embodiment of a transfer device for a round bar-shaped work of the present invention.

FIG. 2 is an explanatory view of a transfer device taken along line AA of FIG. 1 showing one embodiment of the transfer device for a round bar-shaped work of the present invention.

FIG. 3 is a sectional view of a main part of the work posture detecting device, and FIG.
3A is a cross-sectional view showing a state in which a state in which the concave portion formed on the end face of the work W in the upright state is located at the upper portion has been detected as a normal posture, and FIG. 3B is a sectional view of FIG. It is sectional drawing which shows the state which detected that an attitude | position was an abnormal attitude.

FIG. 4 is a sectional view taken along line BB of FIG. 1 showing the reversing device.

[Explanation of symbols]

Reference Signs List 10 drive timing pulley 12 base plate 14 pulse motor 15, 16 support shaft 18 driven timing pulley 20 double toothed timing belt 22 work supply position 24 work posture detection position 26 work reversal position 28 work discharge position 30 work supply position 32 work posture Detecting device 34 Work reversing device 36 Work discharging device 38 Flexible tube 40 Conveying hole 44 Moving body 46 Through hole 48 Shielding member 50 Pressing member 52 Compression spring 54 Air introduction hole 56 Housing 58 Detection sleeve 60 Detection hole 66 Rotary actuator 68 Output Shaft 70 Bearing 72 Reversing shaft 73 Air flow hole 74 Depressed groove 76 Rotary joint 80 Drive timing pulley 82 Followed timing pulley 84 Timing belt 86 Guide plate 88 Holding plate

Claims (2)

(57) [Claims] In a transfer device for a round bar-shaped work, each of which is provided with a work posture detecting device and a work reversing device during a process of transferring a work from a supply position to a discharge position, a driving timing pulley and a driven timing pulley are provided. A double-toothed timing belt that is stretched and driven to run, a supply device that individually supplies the rod-shaped workpieces to be locked in the tooth grooves of the timing belt that is conveyed and positioned at the supply position, and a supply device that A detecting device provided so as to be able to move forward and backward with respect to the rod-shaped work positioned to detect the shape of the end of the supplied work which is supplied and locked in the tooth groove of the timing belt, and a rod-shaped work detected by the detecting device A work reversing device for suction-holding and reversingly driving a bar-shaped work in a tooth space in which the end of the work has an irregular shape; And a discharge device provided so as to be able to move forward and backward with respect to the bar-shaped work conveyed and positioned to discharge the bar-shaped work having passed through the workpiece reversing position. A transfer device for a round bar-shaped work, wherein the work is arranged at equal intervals along the line. 2. The feeding device according to claim 1, further comprising: a cylindrical transport path for continuously transporting the round bar-shaped workpiece in an axial direction; and a movably extending / retreating direction perpendicular to the transport path. A shielding member formed with an insertion hole through which it can pass, and a pressing member slidably supported by the shielding member and elastically pressed and biased toward the cylindrical transport path and synchronously moved with the shielding member, When the shielding member is at the retreat position, the bar-shaped work is prevented from being transported, and when the shielding member is moved to the advanced position and stopped, and the insertion hole and the transport path are aligned, the subsequent workpiece is pressed and held by the pressing member, and the leading end position is set. 2. The transfer device for a round bar-shaped work according to claim 1, wherein only the rod-shaped work is passed through the work.