JP3187810U - Automatic screwing device - Google Patents

Abstract

To provide an automatic screwing device capable of quickly and stably screwing a screw that is fed one by one into a screw hole of a workpiece that is stably positioned and fixed at a predetermined position.
A screw 12 sent one by one from a screw feeding mechanism 11 is held by a screw holding plate 6 and sandwiched by an arm body 1 so that a bit 14 is fitted into a screw groove. In this state, the screw 12 is automatically sent to the workpiece 18 side and screwed.
[Selection] Figure 1

Description

  The present invention relates to an automatic screw screwing device for screwing screws to an object quickly and accurately by feeding one by one.

  There are various methods and apparatuses for screwing an object requiring screw tightening. In general, when hand tightening, screw fall is likely to occur and screw galling is likely to occur. On the other hand, there are various methods for automatically tightening the screw. For example, Patent Document 1 and Patent A document such as “Document 2” is disclosed.

JP-A-5-237729 (FIG. 1) JP-A-6-114651 (FIG. 1)

The “automatic screw fastening device” of “JP-A-5-237729” of “Patent Document 1” is mainly intended to move a screw to a position where screw fastening is necessary, and has a characteristic as such. Although it has, the device which grasps (holds) the sent screw surely and restrains the movement of the object during the screwing operation to the object so that accurate screwing is performed. There is a problem that the screw cannot be tightened quickly and accurately.
The “automatic screw tightening device” of “Japanese Patent Laid-Open No. 6-114651” of “Patent Document 2” is to automatically screw a screw to the workpiece W from the vertical direction, and is characterized by a screw positioning method. However, as in the above-mentioned “Patent Document 1”, there is a problem that the screw cannot be fast and accurate, and both are greatly different from the present invention in the device structure.

  The present invention solves the above-mentioned problems and grips the screw that is sent one by one quickly, accurately and reliably, and sends it to the screwing position of the object (workpiece). It is an object of the present invention to provide an automatic screwing device that is capable of performing an accurate and reliable screwing operation by providing a restraining means for preventing the movement of an object during screw tightening while advancing the screwing operation.

  The present invention has been devised to achieve the above object, and the invention of claim 1 is such that an automatically inserted screw is automatically screwed onto a workpiece which is an object for screwing the screw. A device for wearing, the device comprising: a screw feeding mechanism for automatically feeding the screws one by one; and a screw holding plate for holding the screws by sandwiching the heads of the fed screws in an openable and closable manner And a pair of slidingly holding the screw head while allowing the screw holding plate to pass through the front end side along the vertical direction (hereinafter referred to as the Z direction) through a slit provided in the screw holding plate. An arm body, and a holding body that pivotally supports the base end side to rotate the arm body and holds a bit that fits into a screw groove formed in the head of the screw so as to be movable up and down, Hold the holder and the bit in the Z direction A motor that rotates the bit and rotates the bit, a Z-direction support that slides the motor and the holding body in the Z-direction, and a slide that slides the Z-direction support in the lateral direction (hereinafter referred to as the Y-direction). A Y-direction support body to be moved, a horizontal base for horizontally holding the work in a predetermined position, a work fixing mechanism portion movably held by the horizontal base, and an X-direction support body for sliding the horizontal base in the X direction The arm body is configured to slide and hold the periphery of the screw at the tip (lower end) of the arm body, smooth the opening of the arm body, and restrain the movement of the screw, and the head of the screw A holding part that holds the periphery of the screw is formed, and a lower end of the holding body is formed with a restraining part that abuts against the head of the screw held by the arm body and restricts the movement of the screw in the Z direction. The work fixing mechanism is the screw Wherein the restraining mechanism for restraining the movement of the workpiece only when screwed into the workpiece is formed.

  According to the automatic screwing device of the first aspect of the present invention, the screws sent one by one from the feeding mechanism portion are clamped by the screw holding plate at a predetermined position and can be freely inserted into and removed from the screw holding plate. It is securely held by the inserted arm body and can be moved to a predetermined position of the workpiece as the object. On the other hand, along with this movement, the workpiece is positioned at a predetermined position, and movement and lifting are restricted by the workpiece fixing mechanism. Thereby, the screwing operation | work of a screw is performed accurately, stably and reliably. Since all of the above are automatically performed, a quick and accurate screwing operation can be performed.

The side view which shows the whole general | schematic structure of the automatic screwing apparatus of this invention. The fragmentary sectional view for demonstrating operation of an arm body. The fragmentary sectional view for demonstrating operation of an arm body. The front view (a) and side view (b) which show the whole structure of an arm body. The top view of a screw holding plate. The top view (a) which shows a horizontal stand and a workpiece | work fixing mechanism part, and the fragmentary sectional view (b) which shows the schematic structure of a workpiece | work fixing mechanism part.

  Hereinafter, an embodiment of an automatic screw screwing device 100 of the present invention will be described in detail with reference to the drawings.

The automatic screwing device 100 is roughly divided into the following components. That is, the screw feeding mechanism 11, the screw holding plate 6, the arm body 1, the holding body 2, the motor 3, the Z direction support body 4, the Y direction support body 5, the horizontal base 7, and the X direction. It comprises a support 8, a workpiece fixing mechanism 9, a restraining mechanism 10 held by the support 8, and the like. The screw 12 includes a head portion 12a and a screw portion 12b.
Hereafter, the said component is demonstrated.

  Since the screw feeding mechanism portion 11 is not a special structure but a known mechanism, a description of the structure is omitted here.

The arm body 1 is shown in FIG. 1, FIG. 2, and FIG. 3, and the unit structure is shown in FIG.
That is, the arm body 1 is formed of an elongated and relatively thin arm-like member, and tapered portions 1a and 1f for restricting the smooth operation of the arm body 1 and the movement of the screw are formed at the tip, and the upper portion thereof is formed. A gripping portion 1b that grips the periphery of the head 12a of the screw 12 is formed, and a stepped portion 1c that holds the spring 2d is formed on the uppermost side, and a central hole 1d for rotating the arm body 1 and a stopper 1e and the like are formed. The arm body 1 is composed of a pair of left and right identical shapes.

  The holding body 2 is composed of a block body that is supported by hanging on the slide piece 4a side of the Z-direction support body 4 to be described later via an arm 13, and has an enlarged diameter portion 2a on the top side as shown in FIGS. It consists of a hollow cylindrical body that is formed and forms a small-diameter portion 2b in the downward direction, and that supports the arm body 1 through a pin hole 2c that coincides with the central hole 1d of the arm body 1. Note that a spring 2d that engages with a stepped portion 1c of the arm body 1 is provided in the enlarged diameter portion 2a. In addition, a constraining portion 2e is formed at the lower end of the small diameter portion 2b so as to abut the periphery of the head portion 12a of the screw 12 and prevent the screw 12 from lifting.

  The bit 14 is configured to be detachably attached to the lower end side of the bit support rod 15, and the bit 14 is configured to fit into the screw groove 12 c of the head 12 a of the screw 12. The bit support bar 15 is slidably supported by the holding body 2 and rotated by the motor 3. The motor 3 is connected to the power supply unit 16.

  As shown in FIG. 1, the Z-direction support 4 includes a slide piece 4a, a slide rail 4b that slidably supports the slide piece 4a, and a control unit 4c that moves the slide piece 4a up and down along the slide rail 4b. The control unit 4 c is connected to the power supply unit 16. A slide piece 5a of the Y-direction support 5 is fixed to the slide rail 4b.

The Y-direction support 5 includes the above-described Y-direction slide piece 5 a and a slide rail 5 b that slidably supports the Y-direction slide piece 5 a along the Y direction. The slide rail 5 b is erected on the base 17.
As described above, the holding body 2 having the arm body 1 and the motor 3 are controlled to move in the Z direction and the Y direction. Therefore, the screw 12 held by the arm body 1 is moved in the Z direction and the Y direction, the head 12 a is pressed against the bit 14, and is rotated by the motor 3.

  The screw holding plate 6 is composed of a pair of plates, and its detailed structure is shown in FIG. That is, the screw holding plate 6 includes a plate 6A and a plate 6B that comes into contact with the plate 6B and has an integral structure. As shown in FIG. 5, the plate 6A is composed of a hole 6a for holding the head 12a of the screw 12, a hole 6c that expands through the slit 6b, a slit 6d that is connected to the hole 6c, and the like. And a hole 6f which is continuously provided and expands in diameter, and a slit 6g which is provided continuously therewith. The holes 6a and 6f and the slits 6b, 6d, 6e, and 6g are formed to allow the arm body 1 to pass through.

  As shown in FIGS. 6A and 6B, the horizontal base 7 holds the workpiece 18 on the upper surface, and is supported by the X-direction support body 8 so as to be movable along the X direction. A protrusion 19 is fixed to the side surface of the slide rail 8 a of the X-direction support 8.

  A work fixing mechanism 9 is provided on the horizontal base 7. For example, a positioning piece 9a that is held by contacting four sides of the work 18 having a large number of screw holes 18a is fixed to the work fixing mechanism 9 and the restraining mechanism 10 is held movably in the horizontal direction. Is done.

  As shown in FIG. 6A and FIG. 6B, the restraining mechanism unit 10 includes an L-shaped slide piece 10a held on the horizontal base 7, a ball body 10b fixed to the L-type slide piece 10a, and the like. The ball body 10b is configured to move the L-shaped slide piece 10a in the horizontal direction by coming into contact with the protrusion 19 when the horizontal base 7 moves along the X-direction support body 8. With the movement of the L-shaped slide piece 10a, as shown in FIGS. 6A and 6B, the workpiece 18 is released from the vertical restraint, but the ball body 10b is not in contact with the projection piece 19. The L-shaped slide piece 10a is configured to support the work 18 by restricting the upward movement of the work 18. This detailed structure is omitted.

Next, the screwing operation of the screw 12 to the workpiece 18 by the automatic screwing device 100 will be briefly described.
The screws 12 are fed one by one from the screw feeding mechanism 11 and are held by the screw holding plate 6 as shown in FIG. In this case, as shown in FIG. 2, the arm body 1 is in a state where the tapered portion 1 a is in contact with the peripheral edge of the head portion 12 a of the screw 12, and the bit 14 is separated from the screw groove 12 c of the head portion 12 a of the screw 12. Is in a state.

  Next, the holding body 2, the motor 3 and the like are lowered by the operation of the Z-direction support body 4, and the arm body 1 is lowered while sliding along the periphery of the head 12a as shown in FIG. The head 12a of the screw 12 is clamped by the grip portion 1b by the spring force of the tension spring 2d. At the same time, the bit 14 is fitted into the screw groove 12 c of the screw 12. Further, the restraining portion 2e of the holding body 2 is pressed against the head portion 12a of the screw 12 to prevent the screw 12 from being lifted.

In the above state, the entire Y-direction support 5 moves in the Y direction, and the screw 12 moves to a predetermined position of the workpiece 18. At the same time, the X-direction support 8 is operated, and the work 18 is fed to a predetermined position while being held by the restraining mechanism 10. Here, the motor 3 is operated, and the screw 12 is screwed into the screw hole 18 a of the work 18.
When the above operation is completed, the Z-direction support body 4 and the Y-direction support body 5 are operated to return to the original positions, and the above-described operation is repeated for the next screw 12.
Thus, a large number of screws 12 are sequentially sent to the work 18 side and screwed to the work 18.

  As described above, the automatic screwing device 100 can perform the screwing operation in a state where the work 18 is fixed and positioned at a predetermined position by the operation of the arm body 1 and the like and the work fixing mechanism 9 and the restraining mechanism 10. Fast and stable screwing operation can be performed.

  The present invention consists of the contents of the above description, but is not limited to the contents description, and those of the same technical category are of course applied.

  The present invention can be applied to all workpieces that require screwing, has a high degree of freedom in the form of screws, and has a very wide range of use.

DESCRIPTION OF SYMBOLS 1 Arm body 1a Tapered part 1b Gripping part 1c Stepped part 1d Center hole 1e Stopper 1f Taper part 2 Holding body 2a Expanded diameter part 2b Small diameter part 2c Pin hole 2d Spring 2e Restriction part 3 Motor 4 Z direction support body 4a Slide piece 4b Slide rail 4c Control unit 5 Y-direction support 5a Slide piece 5b Slide rail 6 Screw holding plate 6A Plate 6B Plate 6a Hole 6b Slit 6c Hole 6d Slit 6e Slit 6f Hole 6g Slit 7 Horizontal base 8 X-direction support 8a Slide rail 9 Workpiece fixing mechanism portion 9a Positioning piece 10 Constraint mechanism portion 10a L-shaped slide piece 10b Ball body 11 Screw feed mechanism portion 12 Screw 12a Head portion 12b Screw portion 12c Screw groove 13 Arm 14 Bit 15 Bit support rod 16 Power supply portion 17 Base 18 Workpiece 18a Screw hole 19 Projection body 100 Screwing equipment

Claims (1)

  A device for automatically screwing a screw to be automatically inserted into a workpiece which is an object for screwing the screw, the device automatically feeding the screw one by one. A screw holding plate that holds the screw by holding the head of the screw that is fed in an openable and closable manner, and the screw holding plate in a vertical direction (hereinafter referred to as Z) through a slit provided in the screw holding plate. A pair of arm bodies that slide through and hold the screw head, and pivotally support the base end side to rotate the arm body and the screw head. A holding body that holds the bit fitted in the thread groove formed in the portion so as to be movable up and down, a motor that moves the holding body and the bit in the Z direction and rotates the bit, the motor, the holding body, etc. In the Z direction A Z-direction support that slides, a Y-direction support that slides the Z-direction support in the lateral direction (hereinafter referred to as the Y-direction), a horizontal platform that holds the workpiece horizontally in a predetermined position, and the water It is composed of a workpiece fixing mechanism that is movably held on a flat table, and an X-direction support that slides the horizontal table in the X direction. The arm body slides the periphery of the screw into its tip (lower end). A holding part for holding the screw body and smoothing the opening of the arm body and restraining the movement of the screw and a gripping part for holding the periphery of the head of the screw are formed, and the lower end of the holding body is formed by the arm body. A restraining portion is formed that abuts against the head of the gripped screw to restrain the movement of the screw in the Z direction, and the workpiece fixing mechanism moves the workpiece only when the screw is screwed to the workpiece. Forming a restraint mechanism to restrain Screw automatic screwing device characterized in that it is.

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