JP2011200995A - Auxiliary device for power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary device for a power tool, which secures a large work area and achieves the smooth operability by achieving compactness by configuring in a stand type.SOLUTION: The auxiliary device for the power tool includes: a housing 7 provided to move vertically and rotatably to a support 2 vertically erected on a base plate 1; a slide guide 11 provided to move forward and backward parallel to the housing 7; the power tool 15 provided suspended to an end part of the slide guide 11; and a pull-up wire 8 rolled on a roller 4 provided at an upper end of the support 2 where one end of the wire is arranged at the housing 7 and the other end is arranged at a winding spring 3a.

Description

  The present invention relates to an electric tool auxiliary device that holds an electric tool used for assembling work of an electric device and assists the use of the electric tool.

For example, an assembly operation of an electric device is performed by a flow operation in which an operator is arranged along a path along which parts are conveyed. This work includes, for example, screw tightening work, and an electric screwdriver is used as an electric tool.
In this case, when a large product is screwed, a large work area is required, and the electric screwdriver needs to be operated up and down while maintaining a vertical posture. However, due to the structure, when the electric screwdriver is operated up and down, a moment is generated in the sliding portion and the rotating portion of the holder that holds the electric screwdriver, which makes it difficult to operate.

  Conventionally, there are those described in Patent Document 1 and Patent Document 2 as holders of this electric screwdriver. The holder disclosed in Patent Document 1 is a screw tightening holder having two pivot axes, and can be freely moved in the front-rear direction by bending each axis. The parallel crank mechanism is used, and the weight is balanced by a spring.

  Further, the holder disclosed in Patent Document 2 is a holder made of a piston / cylinder mechanism, and uses a vertical guide means and a piston / cylinder for lifting the weight of tools. This is a mechanism that uses compressed air by an air compressor and lifts it by the pressure.

JP-A-7-001347 JP 2000-094366 A

However, in the holder disclosed in Patent Document 1, when the arm is extended, the trajectory of the electric driver that moves up and down becomes an arc, and is not suitable for vertical operation during screw tightening. Further, in the work near the support column, there is a problem that the arm protrudes to the side and a space for avoidance is required, and it is difficult to install a plurality of units in parallel.
Further, in the holder disclosed in Patent Document 2, a change in driving force at an operation speed affects operability. If you try to move the piston / cylinder by an external driving force, it will try to push out the air in the piston, but the cross-sectional area of the air passage is constant. There is a problem that it becomes larger and becomes an operation resistance, causing a problem in operability.

  The present invention has been made to solve the above-described conventional problems, and the power tool holder is constructed in a stand type to achieve compactness, ensuring a large work area and smooth operability. An object is to provide an auxiliary device for an electric tool.

  An auxiliary device for an electric power tool according to the present invention includes a housing that is vertically movable and rotatable on a column that stands vertically with respect to a base plate, a slide guide that is attached to the housing so as to move back and forth horizontally, and an end of the slide guide And a lifting wire that is wound around a roller provided at the upper end portion of the column, attached at one end to the housing, and attached at the other end to a take-up spring.

  According to the auxiliary device for an electric tool of the present invention, the electric tool is held vertically and the vertical posture is maintained. Can be prevented and work quality can be improved. Since the wire for hanging and supporting the housing is connected to the take-up spring, the repulsive force does not change even if the operation speed of the housing is changed, and the work operation can be reduced. Since the holder for the electric tool has a structure in which a housing that moves the column up and down and rotates and a slide guide that moves back and forth horizontally, the working range can be increased by moving up and down and left and right and front and rear.

  In addition, since the wire is folded and wound by a roller provided at the upper end of the support column, the height of the apparatus can be reduced, the degree of freedom in installation is high, and interference between the winding wire and the slide guide during rotation The operation is smooth, the operation force is constant, and there is an effect that workability is good without requiring external power.

It is a block diagram which shows the auxiliary apparatus for electric tools by Embodiment 1 of this invention. It is a perspective view which shows a part of the auxiliary device for electric tools. It is a top view of a housing and a slide guide. It is a cross-sectional view which follows the AA line of FIG. It is a cross-sectional view which follows the BB line of FIG.

Embodiment 1 of the present invention will be described below in detail with reference to the drawings.
Embodiment 1 FIG.
The power tool auxiliary device shown in FIG. 1 is provided with a winder 3 in which a support 2 is erected perpendicularly to a base plate 1 and a mainspring take-up spring 3a is housed in the vicinity of the base. The support 2 is provided with stoppers 2a and 2b at the upper and lower parts thereof, and a roller holding part 5 for the roller 4 is provided at the upper end side of the upper stopper 2a. Further, the support column 2 between the stoppers 2a and 2b is provided with a housing 7 capable of moving up and down and turning through rotary slide bushes 6a and 6b accommodated in the cylindrical portion 7a.
A wire 8 is wound around the roller 4, one end of which is attached to the housing 7, and the other end is attached to the mainspring winding spring 3 a through the ring portion 9 a of the ring pin 9 attached to the housing 7.

  The housing 7 is integrally formed with a mounting plate 7b that protrudes forward. As shown in FIG. 4, the mounting plate 7b has a U-shaped cross section, and the U-shaped opposing surface projects. A guide member 10 having strips 10a and 10b is attached horizontally. The guide member 10 has an H-shaped cross section, and a slide guide 11 having recesses 11a and 11b on the upper and lower surfaces is attached to be able to move back and forth with a ball 12 interposed. This slide guide 11 is long in the front-rear direction, stoppers 13a and 13b are provided in the middle of the rear end so as to sandwich the housing 7, and an L-shaped tool attachment member 14 is provided at the front end.

  An electric screwdriver 15 is suspended and attached to the tool attachment member 14 as an electric tool. As shown in FIGS. 1 and 5, the electric screwdriver 15 is attached by arranging bearings 16 a and 16 b so as to fit the hole 14 b of the horizontal piece 14 a of the tool attachment member 14 and sandwich the horizontal piece. A shaft 15a formed at the upper end of the electric screwdriver 15 is passed through the center hole of the electric screwdriver 15 and a nut 17 is screwed into a screw portion 15b provided on the upper portion of the shaft 15a to be fixed. A return spring 18 is provided between the housing 7 and the electric screwdriver 15 to return the electric tool 15 drawn forward to the initial position during work.

  Since it is the above configuration, the housing 7 is stopped at the illustrated position where the combined weight of the slide guide 11 and the electric screwdriver 15 and the winding force by the winding spring 3 a are balanced via the wire 8. This position is not a fixed position and can be stopped at any height. Returning upward is also possible by changing the winding force by the winding spring 3a.

  Next, the operation will be described. When the worker grips the electric screwdriver 15 and pulls it forward (forward, in the direction of arrow a), the slide guide 11 is moved lightly and horizontally by the ball 12 of the guide member 10. Then, while performing this pulling-out operation, the housing 7 is rotated around the column 2 and moved above the screw feeder 19. When the electric screwdriver 15 is pulled down to the screw feeder 19 in this state, the housing 7 is lowered along the support column 2 via the slide guide 11, and the wire 8 extends the winding spring 3a. Then, the electric screwdriver 15 holding the screw is moved to a screw tightening position (not shown) to perform screw tightening. The electric screwdriver 15 maintains a vertical posture during the forward / backward, rotational, and up / down operations, and can prevent the screws from being obliquely tightened.

  In this case, since the electric driver 15 is rotatably attached to the slide guide 11 via the bearings 16a and 16b, even if the slide guide 11 rotates around the support column 2 together with the housing 7, the worker can It is possible to work while maintaining the state of holding.

  Further, during the above operation, the wire 8 is always pulled up by the take-up spring 3a, so that the roller 4 and the take-up spring 3a are stretched vertically. Therefore, when the slide guide 11 is rotated by passing the wire 8 through the ring portion 9a of the ring pin 9 attached to the housing 7, the wire 8 is pushed laterally by the ring portion 9a and is bent. As a result, when the slide guide 11 is released at the rotation position, the slide guide 11 returns to the original position due to the tension of the wire 8 in contact with the ring portion 9a. That is, the return operation is automatically performed. In this case, the ring pin 9 has a function of preventing interference between the wire 8 and the slide guide 11 during the turning operation. On the other hand, the electric driver 15 pulled out to the front automatically returns to the initial position shown in FIG. 5 by the reducing force of the return spring 18.

  When the position return operation is unnecessary, the roller holding part 5 follows the housing 7 via the wire 8 without attaching a special interlocking mechanism by attaching the roller holding part 5 to the support column 2 so as to be rotatable. Then rotate. As a result, when the slide guide 11 is rotated, the roller holding portion 5, that is, the roller 4 follows, and even if the electric driver 15 is released, the roller 4 remains stopped at that position.

  As described above, according to the first embodiment, the electric screwdriver is formed into a stand type by the housing provided on the support column so as to be vertically movable and rotatable and the slide guide provided horizontally on the housing so as to be movable back and forth. Since it was comprised so that it may hold | maintain, it can be set as a compact structure, an electric screwdriver can be hold | maintained with a vertical attitude | position in any operation position, and it can prevent the diagonal tightening of a screw. Since the slide guide rotates around the support 2 together with the housing 7, a compact work area having a lateral width can be secured. Therefore, a plurality of units can be installed in the work area for one person of the conventional apparatus.

  Also, if the electric screwdriver is lowered during the screw tightening operation, the slide guide and the housing come together and come closer to the fixed side of the support column 2, that is, the base plate side, so that more stable and tight screw tightening is possible. is there.

  In addition, in Embodiment 1, although the case where screwing was performed using an electric screwdriver as an electric tool was demonstrated, when drilling a workpiece using a drill, a tap, etc. as an electric tool, as an electric tool Drills and taps can be maintained vertically and straight holes can be drilled.

  DESCRIPTION OF SYMBOLS 1 Base plate, 2 support | pillars, 2a, 2b Stopper, 3 Winder, 3a Spring type winding spring, 4 Roller, 5 Roller holding part, 6a, 6b Rotary slide bush, 7 Housing, 7a Tube part, 7b Mounting plate, 8 Wire, 9 Ring pin, 9a Ring part, 10 Guide member, 10a, 10b Convex, 11 Slide guide, 11a, 11b Concave, 12 Ball, 13a, 13b Stopper, 14 Tool attachment member, 14a Horizontal piece, 15 Electric tool , 15a shaft, 15b threaded portion, 16a, 16b bearing, 17 nut, 18 return spring.

Claims (4)

A housing that is vertically movable and rotatable on a column that stands vertically to the base plate, and a slide guide that is attached to the housing so as to be movable back and forth horizontally;
An electric tool attached to the end of the slide guide,
An auxiliary device for an electric tool comprising: a lifting wire having one end wound around a roller provided at an upper end portion of a support and attached to a housing and the other end attached to a take-up spring.   The auxiliary device for an electric tool according to claim 1, wherein one end of the wire wound around the roller is attached to the housing, and the other end is attached to the take-up spring through a ring portion of a ring pin provided in the housing.   The auxiliary device for an electric tool according to claim 1, wherein the electric tool is rotatably attached to the tool attachment member.   The auxiliary device for an electric tool according to claim 1, wherein a pull-back spring is provided between the housing and the electric tool to return the electric tool to an initial position.

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