JPH0730281Y2 - Portable screwing device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is to fasten a plate material or a long member by placing it on the upper surface of the plate materials stacked vertically or on the floor surface. The present invention relates to a portable screwing device capable of performing work.

[Problems to be solved by conventional technologies and devices]

Conventionally, the applicant of the present invention has proposed a practical screwing device as a portable screwing device capable of continuously screwing various members.
Hand-held screw-in devices such as those disclosed in Japanese Laid-Open Patent Application No. 44170 and Japanese Utility Model Laid-Open No. 62-92165 are used.

In other words, this hand-held screw-in device is equipped with a screw supply mechanism that is equipped with a screw holding belt in which a large number of screws are planted at a constant pitch, is attached to the tip of a hand-held driver tool such as an electric type. The screw holding belt is intermittently transferred in conjunction with the movement of pushing or pulling the driver tool toward the member, and one screw is supplied in front of the driver bit in the driver tool, thus It was designed to allow screwing work.

By the way, in a factory or a construction site, for example, plate materials may be vertically stacked and fastened with screws, or the plate materials may be fastened with screws on the upper surface of a square bar.

In this case, in order to perform the fastening work with the above-mentioned hand-held screw-in device, the worker has to lean forward and press the driver tool downward, and the force must be applied in an unreasonable posture. In addition to a great burden on the driver, it requires a considerable amount of skill to set the driver tool in an accurate posture, and thus there is a problem in that the screw is likely to be screwed in in a tilted state.

On the other hand, Japanese Utility Model Laid-Open No. 54-151978 discloses a hole punching device in which a pillar is erected on a base plate large enough for a person to put a foot on, and an electric drill is vertically mounted on the pillar. If the device is replaced by the electric drill of this publication and the handheld screwing, and the device is configured to be placed on a member, floor, etc., the screwing work can be accurately and easily performed. It is thought that it can be done.

However, when the screwing device is mounted as described above, the weight thereof becomes heavy, which causes a problem that a large amount of labor is required to shift and move the screwing device.

It is an object of the present invention to remarkably improve the efficiency of screwing work by making it possible to shift the screwing device very easily and without moving the reliability and reliability of the screwing work.

[Means for Solving the Problems]

In order to achieve this object, the present invention sets up a column on a base plate on which an operator can put his / her feet, and vertically moves the lifting body via a reciprocating mechanism such as an air cylinder. A screwdriver tool that is installed and has a driver bit projecting downwardly from the elevator body, and a screw supply mechanism that supplies one screw below the driver bit in association with the vertical movement of the elevator body. Further, at a suitable portion of the base plate, a shift moving roller that is always supported from above by an elastic body is provided so as to project downward from the lower surface of the base plate, and the elastic force of the elastic body is provided. Is set so that the weight of the worker can move the roller above the lower surface of the base plate.

[Function and effect of device]

In this configuration, when the worker is not placed on the base plate, the rollers are always supported from above by the elastic body, so that the space between the base plate and the fastening member or the floor surface located below the base plate is fixed. Even if there is a gap between them, or even if the base plate is in contact with the floor surface or the upper surface of the fastening member, the friction resistance between the upper surface or floor surface of the fastening member and the base plate Since it can be made extremely small, the screwing device can be displaced and moved with a light force.

On the other hand, when the operator places the base plate on the base plate, the base plate is strongly adhered to the fastening member or the floor surface due to the weight of the worker, and the base plate can be held in a non-displaceable state. By operating the reciprocating mechanism and the driver tool in that state, the screws can be accurately screwed into the members that are vertically stacked.

In this case, when a person is placed on the base plate, the device is not supported via rollers, but the base plate is directly adhered to the fastening member or the floor surface so that the device is directly supported by the base plate. Therefore, the entire apparatus can be held in a stable state, and as a result, the screwing operation can be reliably performed in a stable state.

Therefore, according to the present invention, it is possible to switch between a state in which the screwing device can be moved by shifting with a light force and a state in which the screw can be screwed in accurately and stably without performing any switching operation. This has an effect that the screwing work into the stacked plate materials or long members can be performed efficiently and reliably with a light force.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

In the drawings, reference numeral 1 is a screwing device according to the present invention. The screwing device 1 includes a base plate 2 made of plywood or the like, a columnar support 3 standing upright on the base plate 2, and a side face vertically mounted on the support 3. An elevating body 4 having a U-shape when viewed, and an air cylinder 5 as an example of a reciprocating mechanism that moves the elevating body 4 up and down.
It is composed of an electric screwdriver tool 6 and a screw supply mechanism 7 attached to the lifting body 4. The base plate 2
Are formed on both sides of the support column 3 so that the feet of an operator can be placed thereon.

A support plate 8 is fixed to the upper end of the support column 3, the air cylinder 5 is attached to the support plate 8, and the lower end of the piston rod 9 fitted into the air cylinder 5 is fixed to the upper end of the elevating body 4. ing. Further, the mounting plate 8 has an air unit 10 equipped with a filter, a pressure regulating valve, etc. and a solenoid valve.
11 is attached, and compressed air is guided to the air unit 10 through a hose, and two output ports of the solenoid valve 11 are connected to the upper and lower ports 5a and 5b of the air cylinder 5,
When the electromagnetic solenoid 12 is de-energized, compressed air enters the lower port 5a of the air cylinder and the lifting body 4 rises. When the electromagnetic solenoid 12 is energized, compressed air enters the upper port 5b of the air cylinder 4, The elevating body 4 is configured to descend.

A handle 13 is provided laterally on the upper end of the air cylinder 5.

The driver tool 6 is an electric, hand-held type, and the driver bit 14 is mounted in the tip portion 6a formed in a tubular shape, and the tip portion 6a has an upper end portion of the screw supply mechanism 7. Is fitted and fixed, and the upper end of the screw supply mechanism 7 is tightened and fixed to the lower end grip portion 4a of the elevating body 4 with a bolt 15, whereby the driver tool 6 and the screw supplying mechanism 7 are integrated with the elevating body 4. Fixed in place.

The driver bit 14 is inserted into the screw supply mechanism 7. The driver bit 14 is attached to the rotary shaft of the driver tool 6 via a clutch, and only when a constant force is applied along the axial direction, that is, the driver bit 14 is attached to the head of the screw 20. Only when they are engaged and the screw is pressed in the axial direction, the screw is rotated.

As shown in FIGS. 6 to 7, the screw supply mechanism 7 includes a square pipe-shaped case 16 having a cylindrical body 16a fixed to the upper end thereof, and a hollow sliding body slidably fitted in the case 16. 17 and a female screw is engraved on the inner peripheral surface of the cylindrical body 16a, and the tip portion 6a of the driver tool 6 is screwed onto the female screw.

Then, the sliding body 17 is biased by a spring so as to project downward from the case 16, and further, the case 16 is placed inside the sliding body 17.
The sprocket 18 that rotates intermittently with the downward movement or the upward movement of the
By loading the screw holding belt 19 in which the screws 20 are planted at regular intervals, the screw holding belt 19 is intermittently transferred by the pushing movement or the raising movement of the case 16, and the screws 20 are screwed one by one. It is configured to be supplied below the bit 14.

A nose member 21 is fixed to the lower end of the sliding body 17.

A start switch 22 is provided on the upper end of the air cylinder 5,
When the start switch 22 is turned on, the relay 31 is closed to energize the solenoid 12 of the solenoid valve 11 and the motor M of the driver tool 6 at the same time, while the solenoid of the solenoid valve 11 is provided at the lower end of the support column 3. A limit switch 23 is provided so as to cut off the power supply to the driver 12 and the driver tool 6. When the lifting body 4 descends to a certain position and the contact body 24 contacts the limit switch 23, the relay 31 opens. Electromagnetic solenoid 12
Power to the motor M is cut off, and the driver bit 14
Stops the rotation so that the lifting body 4 moves up.

As shown in FIGS. 2 and 5, a ring-shaped stopper 25 for preventing the elevating body 4 from excessively descending is clamped and fixed at a middle height position of the column 3. .

Then, as shown in FIGS. 10 and 11, at the four corners of the base plate 2, a leaf spring 26 as an example of an elastic body is laterally projected, and the leaf spring 26 is provided with a ball 27a. 27 is attached so that the roller 17 can move slightly above the lower surface of the base plate 2 against the elasticity of the leaf spring 26.

At this time, when the operator does not place the elastic force (strength) of the leaf spring 16 on the base plate 3, a slight gap is generated between the base plate 2 and the fastened member A, and When set on the plate 3, the elastic plate 26 is elastically deformed to set the strength so that the base plate 2 adheres to the member A, so that the base plate 2 is not displaced during the screwing operation, and the screwing device is prevented. 1 can be easily moved and moved.

It should be noted that the screw supply mechanism 7 is located rearward of the front end surface of the base plate 2 and is screwed through the V-shaped notch 28 to improve the stability of the screwing device 1. There is.

In the above structure, when the screwing device 1 is placed at a predetermined position on the upper surfaces of the members A and B that are vertically stacked, when the worker mounts on the base plate 2, the base plate 2 is separated by the weight of the worker. It adheres to the upper surface of the member A and is held immovably in a stable state.

Then, when the operator pushes the start switch 22 with the base plate 2 mounted thereon, the motor M of the driver tool 6 rotates and the lifting body 4 descends.
When the screw 14 is engaged with the head of the screw 20 and descends while rotating, the screw 20 is screwed into both the members A and B while being removed from the screw holding belt 19. When the screw 20 is completely screwed in, the contact body 24 contacts the limit switch 23, the rotation of the driver bit 14 is stopped, and the elevating body 4 is lifted to be in the next screwing posture.

When the worker gets off the base plate 2, the base plate 2
Since there is a gap between the upper surface of the member A and the upper surface of the member A, the screwing device 1 is supported only by the rollers 27, and thus can be displaced with an extremely light force.

Alternatively, the screwing device 1 may be placed on the floor and the members may be moved to sequentially screw the screws into the members.

In the above description, the solenoid valve 11 and the driver tool 6 are operated at the same time. However, as shown in FIG. 9, a sub-limit switch 29 is provided in the circuit to the driver tool 6 to move up and down. If the body 4 descends to some extent, the sub-limit switch 29 may be turned on at the contact piece 30, and the motor M may start rotating during the descending.

Further, the raising operation of the elevating body 4 may be performed manually by the operator while visually confirming the completion of screwing, instead of being automatically performed by the limit switch 23. In this case, Instead of using the solenoid valve 11, the elevating body 4 may be moved up and down by a manual valve.

Furthermore, it goes without saying that the structures of the driver tool 6 and the screw supply mechanism 7 are not limited to those of the embodiment, but when a hand-held driver tool with a handle is used as in the embodiment, the screwing device 1 is not used. Sometimes it can be removed and used as is, further improving its utility value. Further, the driver tool may be of another driving type such as a pneumatic type, and the reciprocating mechanism may be another mechanism such as a screw type reciprocating mechanism.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view of a screwing device, FIG. 2 is a right side view, FIG. 3 is a right side view showing a mounting of a screwdriver tool and a screw supply mechanism, and FIG. 2 is a sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along line VV in FIG.
6 and 7 are enlarged views of the screw feeding mechanism, FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 6, and FIG.
Figure 10 is a plan view of the corner of the base plate, and Figure 11 is XI- in Figure 10.
FIG. 1 ... Screwing device, 2 ... Base plate, 3 ... Support post, 4
... Lifting body, 5 ... Air cylinder as an example of reciprocating mechanism, 6 ... Driver tool, 7 ... Screw feeding mechanism,
10 …… Air unit, 11 …… Solenoid valve, 14 …… Driver bit, 19 …… Screw holding belt, 20 …… Screw, 22 …… Starting switch, 23 …… Limit switch, 26 …… As an example of elastic body Leaf spring, 27 …… Coro.

Claims (1)

[Scope of utility model registration request] 1. A pillar is erected on a base plate on which an operator can place his / her feet, and an elevating body is vertically movably mounted on the pillar through a reciprocating mechanism such as an air cylinder. The elevating body is provided with a driver tool having a driver bit projecting downward, and a screw supply mechanism adapted to supply a screw below the driver bit in association with the vertical movement of the elevating body. A shifter roller, which is always supported from above by an elastic body, is provided at an appropriate portion of the base plate so as to project downward from the lower surface of the base plate, and the elastic force of the elastic body is applied to the worker. The portable screw-in device is set to have a strength such that the roller can be moved above the lower surface of the base plate by the weight of the above.