JPH081454A - Continuous machine screw driving machine - Google Patents

Abstract

PURPOSE:To provide a continuous machine screw driving machine which can automatically and continuously drive screws with the use of air blow. CONSTITUTION:A continuous machine screw driving machine comprises a screw feed part which aligns machine screws 1 in one row and feeds out the same, a separator part 30 which separates the screws fed out one by one, an air blow conveying part 40 for pneumatically conveying the separated screws in the separator part 30 one by one through a conveying tube 41, a screw holding part 53 for holding a screw having pneumatically conveyed through the tube 41 with the distal end of the screw being directed forward, and a screw driver 50 composed of a drive part 51 for screwing the screw.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw driving machine used for sticking interior boards in construction work, etc.
The present invention relates to a continuous screw driving machine capable of continuous driving by continuously supplying screws using compressed air.

[0002]

2. Description of the Related Art As a conventional continuous screw driving machine, a single shot air gun or an electric screwdriver using a so-called board connecting screw, in which a certain number of screws are preliminarily set in a belt, when a board is stuck for interior work It is known to tighten with.

[0003]

However, when the above-mentioned board connecting screw is used, the number of screws set in the belt is limited. Belt replacement work is required, and the screws that have been set in the belt are supplied manually to the air gun, and they are not automatically continuously supplied, thus improving work efficiency. There is a problem that it is not done.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a continuous screw driving machine which can automatically and continuously supply a screw by air blow.

[0005]

In order to achieve the above object, a continuous screw driving machine according to the present invention is provided with a screw feed portion for aligning and feeding the screws in a line, and a screw fed from the screw feed portion. A separator part that separates one by one, an air blow transfer part that pneumatically transfers the screws separated by the separator part to one via a transfer tube, and a screw that is pneumatically transferred through the transfer tube with the screw tip facing forward. And a screw driving driver including a screw driver for screwing the screw.

Here, the screw feed portion has a groove having a width narrower than the outer diameter of the screw head and scoops the screws stored in the container in a row, and the swing arm has the above-mentioned swing arm. A chute that has a groove having substantially the same width as the groove and that is connected to the arm base end side and that continuously conveys the scooped screws can be provided. In addition, the screw feed section,
It is also possible to provide a parts feeder that aligns the screws stored in the container in a row while vibrating them, and a chute that continuously conveys the aligned screws.

Further, the separator part may be provided with a payout device for dropping the screws on the feed line of the screw feed part one by one into an input port. In addition, the air blow transfer unit has an inner diameter slightly larger than the outer diameter of the screw head, and a transfer tube that connects the separator unit and the screw chuck unit, and compressed air from a pressure source is transferred to the root of the transfer tube. It may be provided with an air supply pipe for feeding to the side.

Further, the screw holding portion of the screw driving driver may be one in which screw holders for holding screws and chucks are alternately arranged around the screws.

[0009]

Function: A large number of screws are freely placed in the hopper container of the screw feed section. The many inserted screws are scooped up by swinging the swing arm upward from the bottom of the hopper in the hopper, and lined up in a groove narrower than the outer diameter of the screw head. Alternatively, the parts are sequentially sent out while being arranged in a line by utilizing the vibration.

A part of the screws thus freely thrown in is arranged in a line and taken out, transferred to a chute, and slid and conveyed to a separator portion obliquely below. One of the heads of the screws conveyed to the separator unit is separated and taken out by the payout device and sent to the air blow conveying unit. The screw sent to the air blow conveying unit is pressure-fed by the flow of compressed air sent into the conveying tube, is supplied to the screw driving driver with the screw tip forward, and is held in the screw holding unit in a screwed posture.

The screw held by the screw chuck is
Screw it in place with a screwdriver.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional side view showing a part of an embodiment of a continuous screw driving machine of the present invention. The one shown in the figure is a screw feed section 20 for sending out the screws 1 aligned in a row, a separator section 30 for separating the screws 1 arranged in a row one by one, and the separated screws 1 for each one via a conveying tube 41. An air blow transfer unit 40 for transferring and a handy type electric screw driver 50 for screwing the transferred screw 1 into a predetermined position are provided, and the screw feed unit 20, the separator unit 30, and the air blow transfer unit 40 are the hand truck 10. It is mounted together with the air compressor 11 and a portable generator 12 with an engine which is a driving power source for the air compressor 11.

As shown in FIGS. 1 and 2, the screw feed section 20 includes a swing arm 22 installed so as to swing vertically in a container 21 having a lid 21a, and the swing arm 22. And a chute 27 connected to the base end portion 22a side. The swing arm 22 is the head 1a of the screw 1.
Has a groove 23 in the longitudinal direction having a width narrower than the outer diameter of the container, is supported by the swing shaft 24 at the base end portion 22a, and is swung by the swing cylinder 25 inside the container 21 about the swing shaft 24. It has the function of being driven upward to scoop the screws 1 in a row and arrange them in a downward slope.

Further, the chute 27 has a feed groove 28 having substantially the same width as the groove 23 of the swing arm 22 and is connected to the base end portion 22a of the swing arm in a downward slope, and the swing arm 22
It has a function of continuously sliding and transporting the screw 1 picked up by. The separator part 30 is a screw feed part 20.
Screw 1 continuously sent on the feed line of
The chute 27 is provided with a payout device 32 for laterally shifting the chute 27 one by one and dropping the chute 27 into the charging port 31. As shown in FIGS. 2 to 4, the payout device 32 is arranged orthogonal to the chute 27 and has the screw insertion port 31 at a position laterally offset from the screw feed line of the chute 27 by one screw. Base 33
And a U-shaped slider 34 slidably mounted on the base 33, and an air cylinder 35 that linearly drives the slider 34 back and forth.

The air blow transport section 40 has a screw head 1
a flexible tube 41 having an inner diameter slightly larger than the outer diameter of a, one end connected to the input port 31 of the separator portion 30 and the other end connected to the screw driving driver 50, and a flexible tube 41 as a transfer tube having a smooth inner surface; An air supply path 42 for supplying compressed air from the air compressor 11 as a source to the lower portion of the screw inlet 31 of the separator portion 30 (the root of the flexible tube 41).

In this embodiment, the screw driving driver 50 is constructed by attaching a screw holding portion 53 to the head of an electric driver portion 51. The screw holding portion 53 includes a split type screw holder 54 and a split type chuck 55 as shown in FIGS. The screw holder 54 has a screw supply port 57 to which the flexible tube 41 is connected at the lower portion, and the inner surface thereof is smooth so as to smoothly guide the screw 1 protruding from the screw supply port 57 with its tip facing forward. A claw 58 with a spring, which has a curved surface and elastically contacts the screw 1 to prevent the screw 1 from falling off, is swingably pinned. On the other hand, the chuck 55 has an inner surface that is also a smooth curved surface so as to smoothly guide the screw 1, and is swingably attached by a fulcrum pin 61 via a spring 60. Further, at the tip of the chuck 55, a permanent magnet piece 62 is embedded on the inner surface in order to securely hold the screw 1, and a scratch prevention stopper 63 for preventing damage to a screwed board or the like is required on the outer surface. Is installed according to.

Next, the operation will be described. A continuous screw driving machine is brought into the screw driving work site, the lid 21a of the container 21 is opened, and a large number of screws 1 are thrown in at one time. First, by driving the rocking cylinder 25, the rocking arm 2
2 is swung upward around the swing shaft 24. As a result, the screws 1 unevenly stored in the container 21 are scooped into the groove 23 of the swing arm 22. Since the groove width of the groove 23 is narrower than the outer diameter of the screw head 1a, the head 1a of the screw 1 is caught in the upper edge of the groove 23a and is held in a suspended state to be aligned. The swing arm 22 swings obliquely upward and is connected to the lower chute 27 in a substantially straight line.

Thus, when some of the screws in the container 21 are aligned in a row and connected to the chute 27 of the screw feed section 20, the aligned screws 1 slide down in the groove 23 of the swing arm 22 having a downward slope. It moves to the feed groove 28 of the chute 27, this time it slides down in the feed groove 28 and the leading end reaches the tip of the chute 27. The following screw 1 shoots 2
7 is kept aligned in the feed groove 28.

At this time, the opening of the U-shaped slider 34 of the separator portion 30 located at the tip of the chute 27 is on the extension of the feed line of the chute 27, so that the screw 1 at the foremost end is held in the slider 34. Next, the air cylinder 35 of the separator unit 30 is driven to slide the slider 34 of the payout device 32 sideways from the extension of the feed line of the chute 27 and move it onto the screw insertion port 31. As a result, the screw 1 held by the slider 34 falls into the screw insertion port 31.

Next, a solenoid valve (not shown) in the air supply path 42 of the air blow conveyance section 40 is opened, and compressed air is supplied from the air compressor 11 to the upper part of the screw 1 in the charging port 31 via the air supply path 42. Due to this air flow, the screw 1 is pressure-fed in the flexible tube 41 and is fed to the driver 50. The screw 1 thus supplied to the driver 50 is sent along the inner surfaces of the screw holder 54 and the chuck 55 that form the screw holding portion 53 at the head of the driver portion 51. The tip of the screw 1 is the screw holder 54 and the chuck 5.
At the position protruding from the tip of the screw 5, the root of the screw head 1a comes into contact with the spring-loaded claw 58 of the screw holder and stops. The chuck 55 elastically presses the screw portion of the screw 1 by the elastic force of the spring 60 and holds the screw 1 attracted to the permanent magnet piece 62 to fix the posture and position.

The operator holds the screwdriver 50 in his hand and visually confirms that the screw 1 is held in the screw holding portion 53 (this can be confirmed by checking whether or not the tip of the screw 1 is projected). When a screw tip is pressed against a predetermined portion of the interior material to turn on the switch 64, the driver portion 51 rotates and the screw 1 is rotated and moved forward. As a result, the screw 1 overcomes the elastic force of the spring-loaded pawl 58 on the inner surface of the screw holder 54 and pushes it open, and at the same time, the chuck 5
The tip of the chuck 55 is pushed outward against the elastic force of the spring 60, and is tightened while moving forward.

When tightening is completed and the switch 64 of the driver 50 is turned off (or a separately provided screw supply switch is turned on), the signal is transmitted to a controller (not shown) to drive the air cylinder 35 of the separator section 30. Then, the slider 34 is actuated to feed the next screw 1 into the screw insertion port 31, and then compressed air is supplied to automatically supply a new screw 1 to the screw holding portion 53 of the driver 50 by air blow.

The above automatic screw supply operation is sequence-controlled according to a predetermined order. Regarding the operation of the drive cylinder 25 of the swing arm 22 of the screw feed section 20, for example, the payout device 32 of the separator section 30 is used.
When the number of screws to be paid out is counted and the cylinder 25 is automatically operated when the number reaches a preset value, or when the screws aligned in the chute 27 of the screw feed unit 20 are automatically monitored and the remaining amount is reduced. Any means such as automatically operating the cylinder 25 or automatically operating the cylinder 25 at a predetermined time interval can be adopted. The replenishment of the screw 1 to the container 21 may be performed manually by confirming the residual amount of the screw.

As described above, according to this embodiment, the screw 1 can be continuously and automatically supplied, so that the working efficiency of the continuous screw driving work is significantly improved. Since the air compressor 11 and the portable generator 12 are installed together on the hand truck 10, continuous screw driving work can be performed even in a place where there is no power source. In the above embodiment, the air compressor 11 and the portable generator 12 are provided together, but these do not limit the continuous screw driving machine of the present invention. For example, a separate power source is used instead of the portable generator. May be used, or a separate air compressor may be used.

Further, although the driver 50 of the embodiment is shown as an electric type, it may be a compressed air type. In that case, an air compressor equipped with compressed driving air is used for air blow and driver driving. It can be used together with. Further, in the embodiment, the screw feed section 20 is described as having a swing arm for scooping the screws in the container in a line and a chute for continuously conveying the screws, but the invention is not limited to this, and the screws in the container It may be configured to include a parts feeder that is arranged in a line while vibrating and a chute that continuously conveys the aligned screws.

Further, in the driver 50 of the embodiment,
The case where the screw holder that holds the screw and the chuck are each of the two-division type has been shown.
May be provided. Screw holder 54 in that case
On the inner surface of A, a claw 58 with a spring may be provided as in the embodiment.

In the above embodiment, the screw feed section 2 is used.
Cylinders 25 and 3 are respectively used as a drive device of the swinging arm of 0 and a drive device of the payout device 32 of the separator unit 30.
Although 5 is used, an electric motor can be used instead of the cylinder.

[0028]

As described above, according to the continuous screw driving machine of the present invention, the screws in the container are aligned and sent out in a line at the screw feed section, separated by the separator section and then blown by air. One by one is pneumatically conveyed to a screw driving driver through a conveying tube, and is held in a tightening posture in a screw holding portion at the tip of the driver, and the screw is tightened at a predetermined position by a screw driver to be screwed. Therefore, it is possible to automatically and continuously supply the screw to the driver, and there is an effect that the efficiency of the screw driving work is significantly improved as compared with the conventional case.

In addition to the above effects, the following effects can be obtained. According to the invention of claim 2, since the screws in the container are continuously conveyed in one row by the swinging arm by the scooping chute, the screws can be aligned and sent out from the container without vibration, and noise is generated. Does not occur. According to the invention of claim 3, since the screws in the container are vibrated by the parts feeder and aligned in a line and continuously conveyed by the chute, the same feeder can continuously supply regardless of the size of the screws.

According to the fourth aspect of the invention, the screws taken out aligned in a line at the screw feed unit are dropped into the insertion port by the payout device. Therefore, the shoots can be reliably shot one by one while maintaining the posture of the screws. It can be taken out from the screw to prevent erroneous conveyance of screws. According to the invention of claim 5, the screw is dropped into a flexible tube having an inner diameter slightly larger than the outer diameter of the screw head in the air blow conveyance section, and the screw is pushed by the force of the compressed air to be supplied to the driver. Therefore, the screw can be reliably fed with a simple facility, and the worker can freely work while within the reach of the flexible tube, and even in the vertical and horizontal directions of the driver. Not affected.

According to the sixth aspect of the present invention, since the screw holding portion of the screw driving driver has the screw holders for holding the screws and the chucks alternately arranged around the screws, the screw holding portions are pneumatically conveyed. The screw can be guided smoothly and can be reliably held automatically in the driving posture and position, and the screw driving work can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a side view showing a cross section of a part of an embodiment of a continuous screw driving machine of the present invention.

FIG. 2 is a plan view of a screw feed section, a separator section, and an air blow conveyance section of FIG.

3A and 3B are plan views of the screw dispensing device of FIG. 1, in which FIG. 3A shows a state before a dispensing operation and FIG. 3B shows a state during a dispensing operation.

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3B, showing a state where the screw is dropped by the payout operation.

FIG. 5 is a plan view of an example of a screw holding portion of a screw driving driver.

FIG. 6 is a side view showing a cross section of a part of a screw driving driver.

FIG. 7 is a plan view of another example of the screw holding portion of the screw driving driver.

[Explanation of symbols]

 1 screw 1a screw head 20 screw feed part 30 separator part 40 air blow transfer part 41 transfer tube 50 screw driving driver 53 screw holding part 54 screw holder 54A screw holder 55 chuck 55A chuck 58 spring claw 62 permanent magnet 63 scratch prevention stopper

Claims (6)

[Claims] 1. A screw feed portion for aligning and feeding screws in a line, a separator portion for separating the screws fed from the screw feed portion one by one, and the screws separated by the separator portion via a conveying tube. An air blow transport unit for pneumatically transporting one unit, and a screw driving driver including a screw retaining unit for retaining the screw pneumatically transported through the transport tube with the screw tip forward and a screwdriver unit for screwing the screw A continuous screw driving machine. 2. The screw feed portion has a groove having a width narrower than the outer diameter of the screw head and scoops the screws in the container in a row, and the groove of the swing arm is substantially the same. A swinging arm for scooping the screws stored in a container in a row, which has a feed groove of a width, and which is connected to the base end side of the arm and which continuously conveys the scooped screws, and the scooping arm. The continuous screw driving machine according to claim 1, further comprising a chute that continuously conveys the screw. 3. The screw feed unit comprises a parts feeder for aligning the screws stored in the container in a row while vibrating the screws, and a chute for continuously transporting the aligned screws. Item 1. A continuous screw driving machine according to Item 1. 4. The separator unit is equipped with a payout device for dropping the screws on the feed line of the screw feed unit one by one into an input port. Continuous screw machine. 5. The air blow carrier section has a carrier tube having an inner diameter slightly larger than the outer diameter of the screw head section for connecting the separator section and the screw chuck section, and compressed air from a pressure source. A continuous screw driving machine having an air supply pipe for feeding to the base side of the carrier tube. 6. The screw holding portion of the screw driving driver,
A continuous screw driving machine characterized in that screw holders for holding screws and chucks are alternately arranged around the screws.