JPH0525770Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an automatic drilling device for anchor bolts temporarily installed in an elevator car frame for installation work.

[Conventional technology]

FIG. 5 is a diagram showing a conventional anchor bolt hole drilling device shown in, for example, Japanese Utility Model Application No. 60-7914, in which 1 is a concrete drill, 2 is an awl attached to the concrete drill 1, Reference numeral 3 denotes a moving base on which the concrete drill 1 is mounted so that it can move forward and backward, 4 is a motor that drives the moving base 3, 5 is a torque limiter provided on the output shaft of the motor 4, and 6 is provided on the moving base 3. The reverse command limit switch 6a is a mounting device for the reverse command limit switch 6, and is configured to be able to adjust the dimension B so that it operates when the tip of the cone 2 enters the concrete of the hoistway wall by the dimension A shown in FIG. There is.

Numerals 7a, 7b, and 7c are gear mechanisms that drive the movable table 3 in the forward and backward directions by decelerating the rotation of the motor 4 via the torque limiter 5. Reference numeral 8 denotes a manual handle, which is manually operated and rotated to move the movable platform 3 forward and backward.
9 is a car frame, and 9a is a bolt, which temporarily fixes the anchor bolt hole drilling device to the car frame 9.

Next, the operation of the anchor bolt drilling device shown in FIG. 5 will be explained. The car frame 9a is raised and lowered by known means, and the car frame 9 is stopped so that the center of the awl 2 of the concrete drill 1 coincides with the hole drilling position, and the anchor bolt drilling device is placed. Next, when a drilling command is issued to the control device of a well-known automatic drilling device for anchor bolts, the motor 4 rotates, and the movable platform 3 moves forward in the direction of arrow F shown in FIG. Drilling of holes in the concrete begins. Then, when the drilling progresses to a predetermined depth, the retreat command limit switch 6 is activated, and the motor 4 is controlled to rotate in the reverse direction to retreat the movable table to a predetermined position.

In addition, if the drill bit 2 comes into contact with the reinforcing steel in the concrete during drilling and becomes unable to advance, the torque limiter 5
As a result, an increase in the load on the feeding force of the movable table 3 is sensed and the forward movement is stopped. Furthermore, since the manual handle 8 rotates during drilling, measures are taken to protect the operator, such as providing a clutch mechanism.

[Problem that the invention attempts to solve]

Conventional automatic drilling equipment for anchor bolts activates a torque limiter when the drill hits the concrete reinforcing bars on the hoistway wall to prevent more than a predetermined force from being applied to the drill tip. The awl is still rotating and is insufficient to protect the awl. Further, in order to restore the state in which the awl rotates while a predetermined force is applied to the awl tip, it is necessary to cut off the power to the control device and retreat the movable table to a predetermined position using a manual handle. In addition, because a torque limiter is required, it is not possible to use a general small geared motor, which can obtain linear motion by combining a rack and pinion and integrating it with the motor, and this requires a large drive device. This makes it difficult to carry the automatic anchor bolt drilling device into the hoistway and to attach it to the car frame. In addition, there were other problems, such as the manual handle making the drive mechanism more complicated.

This idea was made to solve the problems mentioned above, and by using a commercially available small geared motor that performs linear motion by combining a rack and pinion in the drive device and integrating it with the motor. In addition to downsizing the automatic drilling device for anchor bolts, it detects when the movable platform advances to the position where the tip of the drill touches the hoistway wall, and when the drill hits the reinforcing bar and stops moving forward, it detects when the drill reaches the specified position. An object of the present invention is to obtain an automatic anchor bolt drilling device that is controlled to automatically start retreating and return to a predetermined position after a lapse of time.

In addition, by making it possible to move the moving table forward and backward only while operating the manual forward and backward buttons of the moving table, a manual handle mechanism is not required, and an automatic drilling device for anchor bolts that is smaller and easier to use is obtained. The purpose is to

[Means for solving problems]

The automatic anchor bolt drilling device related to this invention detects when the tip of the drill advances to a position where it contacts the concrete on the hoistway wall, and when a predetermined period of time has elapsed from that point, it automatically reverses itself and returns to the predetermined position. This system is equipped with a control device that controls the concrete drill so that it returns to its original position and avoids unreasonable movement when the tip of the concrete drill hits a reinforcing bar.

In addition, the above control device includes an automatic manual changeover switch,
A control device is provided which has a function of manually advancing and manually retracting buttons for the movable table and electrically moving the movable table by operating either the manual forward or manual retracting button when the movable table is moved manually.

[Effect]

The automatic drilling device for anchor bolts in this invention detects when the tip of the drill advances to the position where it contacts the concrete on the hoistway wall, and when a predetermined period of time has elapsed from that point, it automatically reverses itself and returns to the specified position. Since it is equipped with a control device that controls the concrete drill so that it returns to its original position and avoids unreasonable movement when the tip of the concrete drill hits a reinforcing bar, it eliminates the need for a torque limiter and also allows the moving platform to move forward and backward. In addition to simplifying the drive device and protecting the tip of the drill, the automatic drilling device for anchor bolts has been made smaller and operations have been simplified in the event that the tip of the drill hits the reinforcing bars of the concrete drill on the wall of the hoistway. .

In addition, since it is equipped with a control device that has the function of electrically moving the moving platform by operating either the manual forward or manual backward button when it is manual,
This eliminates the need for a manual handle mechanism and improves operability.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 1 to 4. In the figure, the same reference numerals as those in FIG. 5 indicate corresponding parts. In FIG. It is a drive device having a geared motor 11a that moves linearly, and is fixed to a pedestal 10. 1
2 is a rack provided along the movable table 3 and meshes with the pinion gear of the drive device 11; 13 and 14 are connecting fittings that fix the rack 12 to the movable table 3; and 15 is a second detection device provided on the pedestal 10. The movable base 3 is placed in a position where it is pressed by the connecting fitting 14 when the movable base 3 moves backward, that is, moves rightward in FIG. 1 and returns to a predetermined position. 17 is a first detection device provided on the side opposite to the cone 2 of the moving table 3;
Reference numeral 8 denotes a third detection device that is provided on the cone 2 side of the movable table 3 and is disposed facing away from the first detection device 17.

FIG. 2 is an enlarged side view of the movable table 3 shown in FIG. 1, in which 19 is a contact rod slidably attached to the movable table 3 by mounting brackets 20a and 20b fixed apart from each other; a spring receiving piece fixed to the contact rod 19 and arranged between the mounting brackets 20a and 20b;
A spring 21 is a compression coil spring fitted into the contact rod 19 and placed between the mounting bracket 20a and the spring receiving piece 19a; 22 is a spring fixed to the contact rod 19 and facing the third detection device 18; The third cam 23 arranged is a first cam fixed to the contact rod 19 and arranged facing the first detection device 17 .

That is, the contact rod 19 is urged toward the hoistway wall by the spring 21, and the spring receiving piece 19a is supported by the mounting bracket 20a, so that the contact rod 19 is held in a predetermined position relative to the movable platform 3 as shown in FIG. Ru. Further, in this state, the third detection device 18 is pressed by the third cam 22. And mobile platform 3
When the movable platform 3 moves forward toward the shaft wall, it moves forward together with the movable platform 3, collides with the shaft wall, and stops. As a result, the contact rod 19 is displaced relative to the movable table 3, and the third detection device 18 is no longer pressed by the third cam 22. When the movable table 3 further moves forward, the first detection device 18 is detected by the first cam 21. The device 17 is configured to be pressed.

FIG. 3 is a diagram showing the external shape of the control device, and 2
3 is a control device, 24 is a drilling command button, 25 is an automatic manual changeover switch, 26 is a manual advance button, 2
7 is a manual reverse button.

FIG. 4 is a circuit diagram showing an example of the control device 23, in which 29 and 30 are the bus bars of the AC power supply, 25a is the normally open contact of the automatic manual changeover switch 25, 31 is an automatic relay, and 31a and 31b are the normally open contacts of the automatic manual changeover switch 25. 31c and 31d are normally closed contacts, and 24a is a normally open contact.
is the normally open contact of the drilling command button 24, 15a, 15
b is a normally closed contact of the second detection device 15, 32 is a drilling command relay, 32a and 32b are its normally open contacts, 18a is a normally closed contact of the third detection device, 33
is the rotation relay of concrete drill 1,
33a and 33b are normally open contacts, and 34 is an on-delay timer for reversing command in case of an abnormality, which is shorter than the time required to complete drilling a predetermined depth after the drill bit 2 contacts the concrete on the hoistway wall. A long time period is set and 34a is its normally open contact.

17a is a normally open contact of the second detection device 17, 35
is a reversal command relay, 35a and 35c are its normally open contacts, 35b is a normally closed contact, and 36
is a forward relay, 36a is its normally closed contact, and 36b and 36c are its normally open contacts. 37 is a reversing relay, 37a and 37d are its normally closed contacts, and 37b and 37c are its normally open contacts. 38 is the motor of concrete drill 1;
11a is a geared motor of the drive device 11 of the moving table 3, and 39 is a capacitor.

The automatic anchor bolt drilling device configured as described above operates as described below. That is, the pedestal 10 is fixed to the car frame 9 with bolts 9a, and an automatic anchor bolt drilling device is temporarily installed. Next, the control device 23, the motor 38 of the concrete drill 1, the geared motor 11a of the drive device 11 of the moving table 3, and the first to third detection devices 17, 1
5 and 18 and between the power supply with a cable (not shown). Then, the car frame 9 is raised and lowered, and the car frame 9 is stopped at a position where the center of the drill bit 2 of the concrete drill 1 coincides with the drilling position.

Next, when the automatic/manual changeover switch 25 is set to automatic, the contact 25a closes and the 29-25a-3
The automatic relay 31 is energized by the circuit 1-30, and its normally open contacts 31a and 31b are closed. At this time, the moving table 3 is in the normal return position, the first detection device 17 is not pressed by the first cam 23 and its normally open contact 17a is open, and the second detection device 15 is in the connecting bracket 1.
The third detection device 18 is pressed by the third cam 22 and its normally closed contact 15a is opened.

Here, when the drilling command button 24 is pressed, its normally open contact 24a closes and the 29-24a-15a-
Hole command relay 32 with circuit 31a-32-30
is energized, its normally open contacts 32a and 32b are closed, and the closing of contact 32a causes 29-32a-3
It is self-maintained by the circuit 7d-31a-32-30. Also, by closing the contact 32b, 29-32b-
35b-31b-37a-36-30 circuit energizes the forward relay 36, and its normally open contacts 36b,
36c is closed. By closing the normally open contacts 36b and 36c of the forward relay 36, the geared motor 11a is connected to the power source so as to rotate in the forward direction, and the movable platform 3 moves forward toward the concrete wall of the hoistway. As a result, the second detection device 15
When the pressure by the connecting fitting 14 is released, the normally closed contacts 15a and 15b are closed. When the movable platform 3 moves further and the contact rod 19 hits the concrete on the hoistway wall, the contact rod 19 is displaced relative to the movable platform 3, that is, moves to the right in FIG. 1 relative to the movable platform 3. , the pressure by the third cam 22 of the third detection device 18 is released and its normally closed contact 18a is closed.

Then, by closing the normally closed contact 18a, 29-3
The rotary relay 33 of the concrete drill 1 is energized by the circuit 2b-18a-33-30, and its normally open contacts 33a, 33b are closed, and the circuit 29-33a
The motor 38 of the concrete drill 1 is connected to the power supply through the circuit 38-33b-30, and drilling of holes in the concrete on the hoistway wall using the drill bit 2 is started. Also, along with this operation, 29-32b-18a-34
-30 circuit energizes the on-delay timer 34 for reversal command at abnormality and starts time counting.

Then, when the movable table 3 moves further forward and the concrete drill 1 continues drilling, and reaches the position where drilling to a predetermined depth is completed, the first cam 23 moves due to the displacement of the contact rod 19 with respect to the movable table 3. As a result, the first detection device 17 is pressed by the first cam 23 and operates, and its normally open contact 17a is closed.

By closing this normally open contact 17a, 29-32b
- Reverse command relay 3 in circuit 17a-35-30
5 is energized, its normally open contacts 35a and 35c are closed, and its normally closed contact 35b is opened, so 29-32
Self-maintained with the b-35a-35-30 circuit.
Then, by opening the normally open contact 35b, the forward relay 3
6 is deenergized, its normally closed contacts 36b and 36c are opened, and the geared motor 11a of the drive device 11 of the movable table 3 is cut off from the power supply, thereby stopping the forward movement of the movable table 3. Also, due to the closing of the normally closed contact 36a, 29
By forming the circuit 32b-35c-36a-37-30, the reverse relay 37 is energized and its normally closed contacts 37a and 37d are opened, and when its normally open contacts 37b and 37c are closed, 29- 37b-
By the circuit 11a-37c-30, the geared motor 11a rotates in the direction in which the moving table 3 moves backward. As a result, the movable table 3 starts to move backward, and the first cam 23 due to the displacement of the contact rod 19 with respect to the movable table 3.
Due to the movement of
7a opens.

When the movable table 3 further retreats and the contact rod 19 moves to a position away from the concrete on the hoistway wall, the third cam 22 moves due to the displacement of the contact rod 19 with respect to the movable table 3, and the third cam 22 The detection device 18 is pressed and operates, and its normally closed contact 1
8a opens. When the normally closed contact 18a is opened, the rotary relay 33 of the concrete drill 1 is deenergized, and the normally open contacts 33a and 33b are opened to cut off the power to the motor 38 of the concrete drill 1 and stop its rotation. At the same time, the on-delay timer 34 for abnormality reversal command is also deenergized and time counting is stopped.

Then, when the movable table 3 further retreats and the second detection device 15 is pressed by the connecting fitting 14 and its normally closed contact 15a opens, the drilling command relay 32 is deenergized and its normally open contacts 32a and 32b are opened. death,
Reversal command relay 35 and reverse relay 37 are deenergized. When the reverse relay 37 is deenergized, its normally open contacts 37b and 37c are opened, cutting off the power to the geared motor 11a of the movable base 3, stopping the movable base 3 at a predetermined retreat position, and automatically drilling the hole. ends at

Next, an explanation will be given of the operation when the drill bit 2 of the concrete drill 1 hits a reinforcing bar in the concrete on the wall of the hoistway during drilling. That is, in this state, the awl 2 has entered the concrete on the hoistway wall to some extent, the movable platform 3 has moved forward from the predetermined retreat position, and the contact rod 19 hits the concrete on the hoistway wall and detects the third detection device. Since 18 started working,
On-delay timer 34 for reversal command in case of abnormality
is currently counting time. Further, the awl 2 of the concrete drill 1 hits the reinforcing bars in the concrete on the hoistway wall, and the movable platform 3 cannot move forward and is in a stopped state.

In this state, when a predetermined period of time has elapsed since the third detection device 18 was activated, the on-delay timer 34 for instructing reversal during abnormality counts up.
Its normally open contact 34a is closed. Normally open contact 34a
29-32b-34a-35-30 by closing
The reversal command relay 35 is energized by the circuit, its normally open contacts 35a and 35c are closed, and the normally closed contact 35b is closed.
is open. After this energization of the reversal command relay 35, the forward relay 36 is de-energized and the reverse relay 37 is energized in the same sequence as in the case of normal drilling described above, so that the movable platform 3 is automatically reversed. Then, it returns to the predetermined retreat position and stops.

Next, manual operation will be explained. That is,
When the automatic manual changeover switch 25 is switched to manual,
The normally open contact 25a is opened and the automatic relay 31 is deenergized, the normally open contacts 31a and 31b are opened and the normally closed contacts 31c and 31d are closed. Manual advance button 2 is activated by closing the normally closed contacts 31c and 31d.
6 is connected to the forward relay 36, and the manual reverse button 27 is connected to the circuit of the reverse relay 37. Now, if the manual advance button 26 is pressed, the normally open contact 26a will close and the 29-26a-31c-37
The forward relay 36 is energized by the circuit a-36-30, and its normally closed contact 36a is opened to open the normally open contact 36.
b, 36c are closed.

As a result, the geared motor 11a of the moving table 3
is connected to a power source, and the moving table 3 is moved in the forward direction by rotation of the geared motor 11a. and,
When the manual forward button 26 is released, its normally open contact 26a is opened and the forward relay 36 is deenergized, so the normally open contacts 36b and 36c of the forward relay 36 are opened and the geared motor 11a is cut off from the power supply. Then, the moving table 3 stops.

Also, the manual reverse operation is similar to the manual forward operation, but the normally open contact 2 of the manual reverse button 27
Normally closed contact 15 of the second detection device 15 in series with 7a
b is connected, the second detection device 15 is pressed and operated by the connecting fitting 14 when the movable base 3 moves backward, so that the movable base 3 does not go too far from the predetermined retreat position when the movable base 3 moves backward.

In addition, manual forward button 26, manual backward button 2
7, it is possible to easily check whether or not the tip of the drill bit 2 of the concrete drill 1 is at a predetermined position in the concrete on the hoistway wall by moving the movable table 3 back and forth before automatic drilling.

[Effect of idea]

As described above, according to this invention, when the awl of the concrete drill hits the concrete reinforcing bars on the wall of the hoistway, the movable platform that moves the concrete drill automatically reverses itself after a predetermined period of time and moves back to the predetermined position. controlled to return to position. As a result, the awl of the concrete drill is protected, and it becomes possible to use a small and simple drive mechanism for advancing and retracting the concrete drill without using a torque limiter as in the past. Therefore, the entire automatic anchor bolt drilling device can be made smaller, lighter, and less expensive, and can be easily attached to the car frame.

In addition, the manual handle and drive mechanism for the moving platform have been eliminated, and a manual forward button and manual backward button have been installed.
Since the control device is movable only while these manual buttons are pressed, there is no need to protect the worker from rotating the handle during automatic hole drilling, making the automatic anchor bolt hole drilling device even more compact and inexpensive. It becomes possible to convert into

[Brief explanation of drawings]

Fig. 1 is a side view showing an automatic drilling device for anchor bolts according to one embodiment of this invention, and Fig.
Fig. 3 is a perspective view of the control device of the device shown in Fig. 1, Fig. 4 is a circuit diagram of the control device of Fig. 3, and Fig. 5 is a diagram of the conventional anchor bolt. It is a side view which shows an automatic hole drilling device. 1 is a concrete drill, 3 is a moving table, 9 is a car frame, 11 is a drive device, 15 is a second detection device,
17 is a first detection device, 18 is a third detection device,
19 is a contact rod, 23 is a control device, 25 is an automatic/manual changeover switch, 26 is a manual forward button, and 27 is a manual backward button. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In an automatic drilling device for anchor bolts that is installed in the elevator car frame and that drills holes in the concrete on the hoistway wall, the movable platform to which the concrete drill is attached is operated by the drill. a drive device that operates forward and backward in the axial direction using a motor as a power source; and a drive device that is provided on the movable base and is biased in the forward direction and held at a predetermined position, and that moves together with the movable base when the movable base moves forward. a contact rod that collides with the concrete on the hoistway wall surface and stops, and a contact rod that moves forward due to the forward movement of the moving platform and stops, thereby detecting that the moving platform has moved forward by a predetermined distance. a second detection device that detects that the movable platform has returned to a predetermined position; and a second detection device that detects that the movable platform has moved forward to a position where the tip of the concrete drill contacts the concrete on the hoistway wall. a third detection device that detects the movement of the movable base; and a third detection device that rotates the motor in a direction in which the movable base moves forward when a drilling command is issued, and rotates the motor in the reverse direction when the first detection device operates, and When the movable table is moved backward and the second detection device operates, the rotation of the motor is stopped, and even if a predetermined period of time has elapsed after the third detection device is operated when the movable table moves forward, the rotation of the motor is stopped. An automatic drilling device for anchor bolts, comprising: a control device that immediately controls the motor to rotate in reverse when the detection device does not operate. (2) A control device that is equipped with an automatic manual changeover switch, manual forward and manual backward buttons for the moving platform, and when in manual operation, the moving platform is electrically moved by operating either of the manual forward or manual backward buttons. An automatic drilling device for anchor bolts as set forth in claim 1 of the utility model registration claim.