JPH0947930A - Working machine fixing clamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a working machine without looseness by providing a magnet to the lower end of a strut, and also by providing a toggle clamp on the end part being opposite to the strut of the arm. SOLUTION: A magnet 40 is placed on a work by turning a strut 41 so as to make a pin 47 coincide with the direction of an oblong hole 42c, and then by penetrating the pin 47 into the oblong hole 42c and lowering it downward. In this condition, the magnet 40 is turned ON, so that it is attracted to the work by a magnetic force. Next, an arm-fixing means 46 is tightened for locking an arm 45 to the strut 41. Then, the handle 43a of a toggle clamp 43 is turnet toward the projected side of the rod, and the bracket 42 is strongly pushed downward by the rod 43b so as to elastically deform the bracket 42, so that the base frame 6 of a working machine is locked to the work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing machine fixing clamp device for fixing a processing machine such as a portable (transportable) milling machine to a work.

[0002]

2. Description of the Related Art During the on-site construction of bridges (bridges for rivers, highways, elevated railroads, etc.), the hanging metal fittings previously welded to the steel floor plates at the factory are gas-cut after the construction.
This gas cutting site is manually grinder finished by an operator. However, the conventional removal of hanging metal fittings has the following problems. I. It takes a lot of manpower and time to finish the grinder by hand at the erection site. B. Due to the grinder finish, undulations remain on the finished surface and the accuracy is poor. C. The cutting dust turns into dust and the working environment is bad. D. Dust is scattered everywhere, cleaning is not possible completely, and the remaining chips are the source of rust. E. Spending wasted effort on rust removal. To alleviate the above problems, the applicant has proposed the following portable milling machine (Japanese Patent Application No. 6-57827).
No., filed on March 28, 1994). A gantry, a milling machine attached to the gantry, a jack attached to the gantry to move the gantry up and down, and a movement that enables the gantry to move horizontally when attached to the gantry or the jack. A portable milling device comprising: means and a fixing means for fixing the pedestal to a work when the gantry is lowered by the jack.

[0003]

However, in the above-mentioned portable milling machine, the fixing means thereof still have the following points to be improved. I want to fix it without looseness. I want to fix it with an operation close to one-touch. I want to make it easy to move the fixing device (clamping device) to the next processing point. I want to fix it at any position on the frame (base frame).

The object of the present invention is to achieve the conditions that fixing can be performed without looseness, operation is simple, the clamp device can be easily moved to the next processing point, and the base frame can be fixed at any position. It is to provide a clamp device for fixing a processing machine.

[0005]

The clamp device for fixing a processing machine of the present invention which achieves the above-mentioned object of the present invention is as follows. (1) A clamping device for fixing a processing machine, which is movable in a horizontal direction with respect to a work, to the work, the engaging portion being engaged with a base frame of the processing machine, and a horizontal extending substantially horizontally from the engaging portion. A bracket having a portion, a pillar extending substantially vertically through an elongated hole formed in the bracket, a magnet connected to a lower end portion of the pillar, and attached to an intermediate portion of the pillar and extending substantially horizontally. A pin having a length that allows the elongated hole to be inserted therein, an arm extending substantially horizontally above the pin of the pillar so as to be slidable with respect to the pillar, and fixing and releasing the fixation of the arm to the pillar. Arm fixing means, a toggle clamp attached to the end of the arm on the side opposite to the support, and a pivotal connection to the end of the bracket on the side opposite to the engaging portion. Clamp device for fixing the processing machine, which consists of a lever

In the above clamping device for fixing the processing machine, since the toggle clamp is provided, the processing machine can be operated by pressing the bracket with the toggle clamp while engaging one end of the bracket with the base frame and supporting the other end with the lever. Can be fixed to the work without loosening. Further, since the tightening is performed by the toggle clamp, it can be tightened only by rotating the handle of the toggle clamp, and the processing machine can be fixed to the work by an operation close to one touch. Also, when moving the processing machine and clamp device from one processing point to the next processing point, the magnet excitation was turned off, the pole was lifted together with the magnet, and the pin was moved through the oblong hole and moved above the bracket. After that, the column and the pin are rotated horizontally to engage the pin with the bracket, thereby supporting the weight of the clamping device with the base frame of the processing machine,
In this state, the processing machine together with the clamp device can be moved to the next processing location, which facilitates the movement. Also, since the bracket is only engaged with the base frame from above,
The base frame can be fixed at any position by a clamp device.

[0007]

1 to 5 show a processing machine according to an embodiment of the present invention, for example, a portable milling machine, and FIG.
10 shows a clamp device for fixing a processing machine according to the embodiment of the present invention. The portable milling machine of the embodiment of the present invention,
The base frame 6, the wheels 13 and 14, the jack bolt 8, the spindle holder 21, the spindle holder lateral feed drive mechanism 29, and the spindle housing 27.
A spindle 3, a spindle rotation drive mechanism 28,
And a cutting depth adjusting mechanism 30. The processing machine fixing clamp device 7 is provided separately from the portable processing machine.

The base frame 6 is made of any one of a lightweight square pipe, a lightweight round pipe, an aluminum extruded material, a resin material, etc., and the weight is reduced. Wheel 1
Reference numerals 3 and 14 are attached to the base frame 6 to move the base frame 6 horizontally. 13 is a rotatable wheel (caster) with a stopper, and 14 is a non-caster type wheel. Since one of the front and rear wheels is a caster type wheel, it is easy to change the direction. The jack bolt 8 is a manual type, and the weight is reduced by not using a hydraulic jack. The jack bolts 8 are provided at the four corners of the base frame 6, and the horizontalness of the base frame 6 can be obtained by adjusting them. The clamping device 7 for fixing the processing machine is detachably engaged with the base frame 6 separately from the base frame 6. The clamping device 7 for fixing the processing machine has, for example, an electromagnetic magnet 40 or a permanent magnet. After positioning the portable processing machine on the work, it is engaged with the base frame 6,
The base frame 6 is fixed to the work.

The spindle holder 21 is movably supported by the base frame 6 in a lateral direction (horizontal direction). The base frame 6 has a spindle holder lateral feed guide 9
Is fixed, and the spindle holder 21 moves along the spindle holder lateral feed guide 9. The spindle holder lateral feed drive mechanism 29 is attached to the base frame 6 and drives the spindle holder 21 laterally. The spindle holder lateral feed drive mechanism 29 includes a spindle holder lateral feed screw shaft 24 extending in the horizontal direction that is rotatably supported by the base frame 6 and is screwed into a nut 25 fixed to the spindle holder 21, and the shaft 24 is attached to the belt 11. And a spindle holder traverse motor 10 for rotating and traversing the spindle holder 21. The forward rotation, the reverse rotation, the rotation speed, and the stop position of the motor 10 are controlled by the control operation panel 2 mounted on the base frame 6. Spindle holder 21
Is made of cast aluminum or resin for weight reduction.

The spindle housing 27 is vertically movably supported by the spindle holder 21 via a spindle housing vertical guide 5. The spindle housing 27 is made of cast aluminum or resin for weight reduction. In the spindle housing 27,
A spindle 3 extending in the up-down direction is rotatably supported, and a milling cutter 23 is detachably (hence, replaceable) attached to the lower end thereof. The milling cutter 23 rotates integrally with the spindle 3. The spindle housing 27 has a spindle rotation drive mechanism 28.
The mechanism 28 includes a cutter rotation motor 12 supported by a spindle housing 27, a V pulley connected to the motor shaft, a V pulley connected to the upper end of the spindle 3, and a space between the pulleys. It comprises a V-belt 4, which is stretched over the shaft, and transmits the motor rotation driving force to the spindle 3 to rotate the cutter 23. The spindle 3, the cutter 23, and the cutter rotation motor 12 move up and down together with the spindle housing 27.

The vertical movement of the spindle housing 27, the spindle 3, the cutter 23, and the cutter rotation motor 12 with respect to the spindle holder 21 is performed by a cutting depth adjusting mechanism 30. The cutting depth adjusting mechanism 30 includes a screw shaft 20 rotatably supported by the spindle holder 21 while being restrained from moving in the axial direction, and a nut 22 fixed to the spindle housing 27.
The screw shaft 20 and the nut 22 are screwed together, and by rotating the screw shaft 20 around its axis, the nut 22 and the spindle housing 27 are fixed to the spindle holder 21.
It is designed to move up and down.

As shown in FIGS. 1 and 4, the cutting depth adjusting mechanism 30 further includes a rotating handle 16 that rotates integrally with the screw shaft 20, and a plurality of rotating handles 16 that rotate integrally with the screw shaft 20. Rotating plate with notch 18 having notch 31, rotating plate with notch 18, spindle holder 21, and screw shaft 2
A turntable 19 rotatable with respect to 0, an eccentric cam 32 rotatably attached to a spindle holder 21, a lock handle 15 which rotates integrally with the eccentric cam 32,
It has a pin holder 33 attached to the rotary disc 19, and a lock pin 17 biased by a spring 34 from the pin holder 33 toward the outer peripheral surface of the notched rotary disc 18. The lock pin 17 has a ball at its tip. Screw shaft 2
If the thread pitch of 0 is 5 mm, for example, the notch 3
If five 1s are provided on the circumference, the cutter 23 can be fed in the vertical direction by 1 mm per notch. By engaging the lock pin 17 and the notch 31 of the notched turntable 18, every 1 mm feed of the cutter 23 (rotating handle 16
When the rotation angle of the rotation handle 16 is 72 degrees, the rotation of the rotation handle 16 is felt, and if the cut depth is, for example, 2 mm, the rotation should be stopped at a position where the rotation is felt twice.

A flexible sheet 26 is detachably attached around the cutter 23 at the lower end of the base frame 6, for example, the lower end surface. This sheet 26 closes the space between the lower end surface of the base frame 6 and the work surface, and fulfills the function of preventing chips from scattering. In addition, 1 is a handle. The flexible sheet 26 is made of a resin sheet, a rubber sheet, a cloth sheet, or the like, and the flexible sheet 26 may be provided with a notch for facilitating turning. Further, as shown in FIG. 5, a flexible sheet 39 is provided around the cutter 23 at the lower end of the spindle housing 27. The flexible sheet 39 is made of any one of a resin sheet (preferably a transparent sheet), a rubber sheet and a cloth sheet, and the flexible sheet 39 is provided with a cut 40 'for facilitating turning. . The reason why it is easy to turn is to make it easier to remove chips and replace the cutter. Further, the flexible sheet 39 is attached to the spindle housing 27 in a detachable manner, and this detachable structure is composed of any of a magic tape 41 ', a hook, a wire band and the like. The chips are collected by using an electric vacuum cleaner or a vacuum device attached to the base frame.

As shown in FIGS. 6 to 9, the processing machine fixing clamp device 7 is a device for fixing a portable milling machine, which is movable in the horizontal direction with respect to the work, to the work. , Column 41, pin 47, arm 45, arm fixing means 46, and toggle clamp 43.
A lever 48, a tightening margin adjusting plate 44, and a handle 49. The bracket 42 has an engaging portion 42a that is engaged with the base frame 6 of the milling machine from above, and a horizontal portion 42b that extends substantially horizontally from the engaging portion 42a. The horizontal portion 42b extends in the horizontal portion longitudinal direction. It has an elongated hole 42c. The support column 41 is inserted into the elongated hole 42c of the bracket 42 and extends substantially vertically. The magnet 40 (for example, an electromagnetic magnet or a permanent magnet) is detachably connected to the lower end of the support column 41 with a screw or the like. The pin 47 is attached to an intermediate portion of the support column 41 in the up-down direction and extends substantially horizontally.
It has a length that can pass through c. The arm 45 is a support post 41.
Is provided at a position above the pin 47 so as to be slidable with respect to the column 41, and extends substantially horizontally above the engaging portion 42a. At the end of the arm 45 on the column 41 side,
Arm fixing means 46 for fixing the arm 45 to the column 41 or releasing the fixation is provided. Arm fixing means 4
6 is a tightening bolt (wing nut), for example. A toggle clamp 43 is provided at the end of the arm 45 opposite to the support column 41.

As shown in FIG. 10, the toggle clamp 43 is one in which the rod 43b travels a predetermined distance (for example, 30 mm) by rotating the handle 43a between the position indicated by the solid line and the position indicated by the chain double-dashed line. Then, the pressing force is amplified and becomes about 200 kg at the protruding position. As the toggle clamp 43 itself, a commercially available product can be used. Further, the tightening margin adjusting plate 44 is attached to the toggle clamp 43 and extends downward. As shown in FIGS. 6 to 9, the lever 48 is rotatably connected to the end portion of the bracket 42 opposite to the engaging portion 42a. Further, the handle 49 is detachably attached to the upper end of the column 41.

Next, the operation will be described. The portable milling machine is moved to a predetermined position. When the position is determined, the rotatable wheel 13 is locked and the jack bolt 8
Adjust and adjust to be parallel to the work. When the parallel alignment is completed, the magnet 7 is engaged with the base frame 6 and the base frame 6 is clamped on the work. This clamp is performed in the following procedure. Initially, the magnet 40 is caught on the bracket 42 in a state of being rotated by 90 ° via the pin 47 attached to the support column 41 (state of two-dot chain line in FIG. 7). First, rotate the column 41 by 90 °
7 and the direction of the long hole 42c are matched, and the pin 47 is changed to the long hole 42c.
By inserting c and lowering it, magnet 4
0 is dropped on the work. In this state, the magnet 40 is turned on and magnetically attracted to the work. Then, lever 4
8 is rotated downward to bring the lower end of the lever into contact with the upper surface of the magnet 40 (state of FIG. 6). Then, with the arm fixing means 46 free, the tightening margin adjusting plate 44 is moved to the bracket 4
The arm 45 is lowered (the state of FIG. 8) until it abuts 2 (however, the toggle clamp 43 is in the unclamped state).
In this state, there is a gap of 25 mm between the tip of the rod 43b of the toggle clamp 43 and the upper surface of the bracket 42 (see FIG. 8). In this state, the arm fixing means 4
6 is tightened and the arm 45 is locked to the support column 41.
Then, the handle 43a of the toggle clamp 43 is rotated toward the rod projecting side (state of FIG. 9), the bracket 42 is strongly pushed downward by the rod 43b to elastically deform the bracket 42, and the base frame 6 is locked to the work. In the state of FIG. 9, since the rod 43b projects 30 mm,
A gap of 30-25 = 5 mm is generated between the lower end of the tightening margin adjusting plate 44 and the elastically deformed bracket 42 (FIG. 9).
reference).

When moving to the next position, the handle 43a is rotated to release the clamp by the toggle clamp 43, the support column 41 is pulled up together with the magnet 40 by the handle 49, the pin 47 passes through the long hole 42c, and the bracket 42 of the bracket 42 is moved. When coming to the upper side (the position indicated by the chain double-dashed line in FIG. 6), the pillar 4
1 is rotated by 90 °, the pin 47 is hooked on the upper surface of the bracket 42, the entire weight of the clamp device 7 including the magnet 40 is supported by the base frame 6, and the base frame 6 is moved to the next place by using wheels. . Therefore,
It is not necessary to manually move the heavy magnet 40.

Then, AC200V (or AC100
Connect the V and 200V common connector to the AC200V (or AC100V) power supply or connect to the power supply from the battery to turn on the main breaker inside the control and operation panel. Then, the spindle holder traverse motor 10 is driven to move the spindle holder 21 so that the cutter 23 is located directly above the highest position of the lifting tool gas cutting portion of the work. Then, the rotary handle is unlocked by the lock handle 15, the rotary handle 16 is rotated, and the cutter 23 is lowered until it hits the highest point of the lifting tool gas cutting portion of the work. At this position, the lock handle 15 is rotated to press the eccentric cam 32 against the outer peripheral surface of the rotary disc 19 to lock the rotary disc 19. During this time, the cutter 23 is kept in a rotating state. Next, the rotary handle 16 is rotated in the direction in which it moves up by one notch. Next,
The spindle holder traverse motor 10 is driven to horizontally separate the cutter 23 attached to the spindle 3 from the highest point of the work.

Next, the rotary handle 16 is rotated by a predetermined number of notches. At this time, since the turntable 19 is locked, the notched turntable 18 rotates with respect to the turntable 19. In the case of this machine, the cutter moves up and down by 1 mm for each notch, so if you want to have a cutting depth of 2 mm, turn 2 notches + 1 notch. Since the lock pin 17 fits into the notch 31 of the notched turntable 18 for each notch, there is a feeling of response, and the cutting depth can be easily and accurately set and adjusted. Next, the spindle holder traverse motor 10 is driven to drive the spindle holder 21
Is advanced toward the hanging tool gas cutting portion of the work, and cutting is started by the cutter 23. When the spindle holder 21 reaches the forward end, the limit switch detects a signal, and the spindle holder 21 automatically returns to the backward end (home position). In this case, the cutting range is automatically detected by monitoring the current value of the cutter rotation motor 12 and detecting the difference between the current values at the time of cutting and at the time of non-cutting. It is also possible to automatically return to the original position from the position where When the cutter 23 is replaced, the lock 23 is unlocked by the lock handle 15 and the rotary handle 16 is rotated.
Can be raised to a position of 150 mm on the floor surface, and the cutter can be easily replaced.

Next, the operation will be described. Since the wheels 13 and 14 are provided in this machine, it can be moved to any position and is portable. Further, in this machine, since the base frame 6 is formed of a square pipe (hollow square bar), a hollow round pipe, or a resin material, and the spindle holder 21 and the spindle housing 27 are made of cast aluminum or a resin material, the weight is conventionally proposed. It is almost half or less than that of the above-mentioned ones, and it becomes easy to carry and the portability is improved. Further, since the magnet 7 is detachable from the base frame 6, it is not necessary to move the unit together with the magnet 7, and the weight of the unit can be reduced. In addition, jack 8
Since the bolt is used and a hydraulic cylinder is not used, the weight of this machine is reduced. Further, since the transverse feed mechanism is the motor 10 and does not use a hydraulic cylinder, the weight of the machine is reduced.

In the clamping device 7 for fixing the processing machine, the engaging portion 42a of the bracket 42 is engaged with the base frame 6, and the horizontal portion 42b is supported by the lever 48, and the toggle clamp 43 is set to the clamping side. Since the horizontal portion 42b is pressed until it elastically deforms, the base frame 6 is clamped to the work without loosening. The gap 5 mm in FIG. 9 is the elastic deformation of the bracket 42, and if looseness occurs, the elastic deformation absorbs this and absorbs the looseness. Further, when tightening with the toggle clamp 43, the rod 43b can be simply rotated by rotating the handle 43a.
The base frame 6 can be locked to the work by projecting and retracting, and locking and unlocking are performed by turning the handle 43a, that is, by one-touch operation. Therefore, the operation is extremely simple and easy. In addition, since the entire weight of the clamp device 7 including the magnet 40 can be supported by the base frame 6 when moving to the next processing location, the movement is easy. Further, since the bracket 42 is only fitted and engaged with the base frame 6, the base frame 6
Can be engaged in any position, and the base frame 6 can be fixed to the work in any position.

To adjust the cutting depth, the rotary handle 16 is turned and the cutter 23 is applied to the highest position of the cut part of the work, and the upper surface of the general part of the work at that time and the cutter 23.
The depth of the cut is determined by measuring the height of the gap between and (which can be easily measured visually or with a ruler), and the rotary handle 16 is rotated in the upward direction by one notch. The cutter 23 is horizontally separated from the part to be cut, and then the rotary handle 16 is turned to make an angle corresponding to the set cutting depth +
Since it is sufficient to turn the notched turntable 18 by an angle corresponding to one notch (in addition, since each notch has a response, it is easy to know how many notches have been turned), it is easy to adjust the cutting depth. Further, the chips generated during cutting by the cutter 23 hit the sheet 39, and even if they pass through the sheet 39, they hit the sheet 26 and are not scattered to the outside, so that the deterioration of the working environment due to the scattering of chips can be prevented. Further, by making the sheets 39 and 26 transparent, the accumulation condition of the chips can be visually observed, and by forming the notches in the sheets 39 and 26, the chips can be easily turned over to take out the chips.

[0023]

According to the clamp device for fixing a processing machine of the present invention, a bracket, a column, a magnet, a pin, an arm,
Since the arm fixing means, the toggle clamp, and the lever are provided, a clamp without loosening, simple operation, easy movement, and fixing of the base frame at any position can be achieved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a portable milling machine according to an embodiment of the present invention taken along the line AA of FIG.
It is a front view.

2 is a plan view of the portable milling machine of FIG. 1. FIG.

FIG. 3 is a side view of the portable milling machine of FIG. 1.

FIG. 4 is an enlarged plan view of a portion of a cutting depth adjusting mechanism of the portable milling machine of FIG. 1.

5 is an enlarged side view of the lower end portion of the spindle housing of the portable milling machine of FIG.

FIG. 6 is a front view of a clamping device for fixing a processing machine according to an embodiment of the present invention.

FIG. 7 is a plan view of the device of FIG. 6;

8 is a side view of the apparatus of FIG. 6 before the toggle clamp is clamped.

9 is a side view of the apparatus of FIG. 6 after clamping the toggle clamp.

FIG. 10 is a side view of the toggle clamp.

[Explanation of symbols]

 3 Spindle 6 Base frame 7 Clamping device for fixing machine 8 Jack bolt 10 Spindle holder traverse motor 12 Cutter rotating motor 13, 14 Wheel 15 Lock handle 16 Rotating handle 17 Lock pin 18 Notch rotating disc 19 Rotating disc 20 Screw shaft 21 spindle holder 22 nut 23 cutter 24 spindle holder horizontal feed screw shaft 25 spindle holder horizontal feed guide 26 flexible sheet 27 spindle housing 28 spindle rotation drive mechanism 29 spindle holder horizontal feed drive mechanism 30 cutting depth adjustment mechanism 31 notch 32 Eccentric cam 39 Flexible sheet 40 'Notch 40 Magnet 41' Magic tape 41 Strut 42 Bracket 42c Long hole 43 Toggle clamp 43a Handle 4 Tightening margin adjusting plate 45 arm 46 arm fixing means 47 pin 48 lever 49 handle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Shimokawa 5 Topic Town, 5-4 Yonbancho, Chiyoda-ku, Tokyo Topy Industries Co., Ltd.

Claims (1)

[Claims] 1. A clamp device for fixing a processing machine, which is movable in a horizontal direction with respect to a work, to the work, the engaging portion being engaged with a base frame of the processing machine, and substantially horizontally from the engaging portion. A bracket having a horizontal portion that extends, a pillar that extends substantially vertically through an elongated hole formed in the bracket, a magnet that is connected to a lower end portion of the pillar, and a magnet that is attached to an intermediate portion of the pillar and is substantially horizontal. A pin having a length that can be inserted into the elongated hole, a substantially horizontally extending arm that is provided above the pin of the pillar so as to be slidable with respect to the pillar, and fixes and fixes the arm to the pillar. An arm fixing means for releasing, a toggle clamp attached to an end of the arm opposite to the support column, and a toggle clamp attached to an end of the bracket opposite to the engaging portion. Linked to a lever, machine locking clamping device consisting of.