JPH09164506A - Dado joint making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rotation unless a bit is allowed to fall. SOLUTION: A clutch cam 9 having engaging pawls 17, 17... provided thereto in a protruding state is inserted into a follower pulley 6 under pressure up to the lower end of the pulley 6 in which a driven shaft 10 is fitted and clutch pawls 16, 16... are provided to the lower end of the cam sleeve 12 integrally rotated along with the driven shaft 10 by key connection in a protruding state above the clutch cam. The lower end part 11a of the key 11 of the driven shaft 10 has a downwardly tapered shape and, when the driven shaft 10 is allowed to fall, the lower end part 11a comes into contact with a tapered guide part 18 provided to the inner surface of the clutch cam 9 in a protruding state and the key 11 is smoothly guided to any one of passing grooves. Further, when the key 11 passes through any one of the passage grooves 20, the clutch pawls 16 and the engaging pawls 17 are always set so as to become a just meshed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large insert processing machine for cutting two-step grooves on a work by mounting different kinds of bits on the lower ends of a plurality of spindles arranged in parallel in a main body.

[0002]

2. Description of the Related Art In a depositing machine, two spindles each having a bit mounted at the lower end are provided side by side in a housing of a main body so as to be vertically movable and rotatable independently of each other. By manually operating a sleeve that moves up and down together with the spindle with a lever or the like, each bit can be moved up and down independently.

[0003]

Even if each of the above-mentioned spindles can move up and down independently, rotation transmission is driven by a motor and a driven pulley externally fitted to the two spindles so as to be integrally rotatable. Since the belt is wound between the two spindles, the two spindles rotate simultaneously. Therefore, if one bit is lowered and the motor is driven, the other bit that is not used (not lowered) will also rotate simultaneously, and the cutting chips generated by the cutting with one bit will be caught and removed. Was an extra effort.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a large-insertion processing machine which eliminates the inclusion of the above-mentioned cutting waste and improves the usability, and the construction thereof is such that the predetermined descending positions of the respective spindles are provided. It is characterized in that it is provided with a rotation transmission means that operates in accordance with the above-mentioned clauses and permits the rotation of the spindle. Also, the rotation transmitting means is rotated by the motor drive, and an engaging claw formed on a driven pulley that is loosely fitted to each of the spindles, and an engaging claw formed on the spindle side, at the predetermined lowered position of the spindle. It is desirable that the clutch mechanism is composed of a clutch pawl that meshes with the pawl and that transmits the rotation of the driven pulley to the spindle side. When the engagement claw of the driven pulley and the clutch claw on the spindle side are engaged with the clutch mechanism, one of the driven pulley and the spindle is rotated so that the engagement position of the engagement claw and the clutch claw is appropriate. It is desirable to provide positioning means for modifying to. Further, the positioning means is fitted into the engaging claw and the clutch claw at an appropriate meshing position to form a protrusion formed on the spindle and a driven pulley side, and guides the protrusion as the spindle descends. And a passage groove provided with a guide portion that operates. Further, the clutch mechanism is provided with an electric detecting means for detecting a lowered position of the spindle in which the engaging claw and the clutch claw are engaged, and the motor drive is performed only when the electric detecting means detects the lowered position. Is desirable. Further, it is desirable that the clutch mechanism is provided with a brake means for stopping the rotation of the driven pulley by coming into contact with the spindle side which is separated from the engaging claw of the driven pulley. Further, the lower part of the spindle is axially supported by a sleeve that moves up and down together with the spindle, and a locking portion is provided between the two sleeves on a surface corresponding to each sleeve. It is desirable to provide a stopper member for the locking portion on the sleeve side to prevent the sleeve from descending.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of the large insertion processing machine 1,
Reference numeral 2 denotes a processing machine main body which is horizontally movable forward, backward, leftward and rightward with respect to a support base (not shown). A motor 2a is vertically arranged behind the center of the housing 4 on which the cover 3 is worn as shown in FIG. , A drive pulley 2b directly connected to the motor shaft
The belt 7 is wound between the driven pulleys 6 and 6 provided above the rotation mechanisms 5 and 5 of the bits arranged in parallel to the front surface of the housing 4, so that the rotation of the motor 2a is prevented. , Transmitted to the driven pulleys 6 and 6 via the belt 7,
The driven pulleys 6 and 6 are rotated simultaneously. Next, since the bit rotating mechanism 5 is bilaterally symmetrical, the left side will be mainly described. The driven pulley 6 is a cylindrical body that is axially supported by ball bearings 8 and has a winding portion of the belt 7 formed on the upper outer periphery thereof, and has a lower end for rotation transmission described in detail later. The clutch cam 9 is press-fitted. Further, a driven shaft 10 as a spindle and a cam sleeve 12 are coaxially inserted in the driven pulley 6, respectively, and a key 11 fixed to the driven shaft 10 axially above the driven shaft 10 and a cam sleeve 12 are provided. The driven shaft 10 is integrally rotatable with the cam sleeve 12 and is vertically slidable by fitting with the key groove 13 formed in the inner circumference in the axial direction. Further cam sleeve 12
Is urged downward by the compression spring 14 of the brake mechanism 30 provided on the upper portion of the cover 3, and a C ring 15 is fixed to the upper opening to prevent the upper end of the driven shaft 10 from coming off, while ... are provided with three clutch claws 16, 16 protruding downward, and the driven pulley 6 is engaged and disengaged with the clutch cam 9.
A clutch mechanism that transmits the rotation of the above from the cam sleeve 12 to the driven shaft 10 is configured.

Below the driven shaft 10 is a cylindrical sleeve 21 which is loosely inserted in the housing 4, and is vertically movable and rotatable by upper and lower ball bearings 22 and 22 and a locking ring 23. Is supported,
A bit is detachably attached to the holder portion 24 at the lower end of the bit. Here, the straight bit 25 for the flat groove is on the left side of FIG. 1, and the dovetail bit 26 for the dovetail groove is on the right side. Further, a connecting bolt 27 is fixed to the sleeve 21 by inserting it through the through hole 4a of the housing 4, and the connecting bolt 27 connects the central portion of a lever 29 pivotally supported to the side of the housing 4 by a support pin 28. Therefore, by operating the tip of the lever 29 up and down, the sleeve 21 and the driven shaft 10 are connected via the connecting bolt 27.
It is possible to move the respective bits upward and downward integrally with each other so that the respective bits can be retracted from the housing 4.

The details of the clutch mechanism including the clutch cam 9 of the driven pulley 6 and the cam sleeve 12 will be described below. FIG. 3 is an explanatory view of the clutch mechanism, and FIG. 4 is an explanatory view of the clutch cam 9, respectively. The clutch cam 9 has a ring shape, and three engaging claws 17, which are evenly arranged (every 120 °), are provided on the upper end thereof. 17 ..., and three guide portions 18, 1 that are equally arranged on the inner surface (every 120 °).
., And the guide portion 18 is formed by a through hole 19 of the driven shaft 10 and three passage grooves 20, 20 .. Is tapered toward the upper end of the. Further, as shown in FIG. 4 (A), each of the engaging claws 17 has a contact surface 1 that rises from the vicinity of one side of the passage groove 20 in parallel with the axial direction.
7a and a circumferential facing surface 17b continuous with the contact surface 17a.
And a sloped surface 17c that is continuous with the facing surface 17b and slopes. Further, the clutch claw 16 on the cam sleeve 12 side has one clutch claw 16 located outside the key groove 13 and is also arranged uniformly every 120 °, and abuts on the contact surface rising parallel to the axial direction. 16a,
The trapezoidal shape including the circumferential facing surface 16b connected to the contact surface 16a and the inclined surface 16c connected to the facing surface 16b is similar to the clutch claw. Further, the lower end portion 11a of the key 11 fixed to the driven shaft 10 has a downwardly tapered shape, and when the lower end portion 11a and the similarly tapered guide portion 18 come into contact with each other, the key toward the clutch cam 9 is moved. 11 is smoothly guided to any of the passage grooves 20. Therefore, here, when the key 11 is fitted in any of the passage grooves 20 of the clutch cam 9, the contact surface 17a of the engaging claw 17 and the contact surface 1 of the clutch claw 16 are always in contact.
6a, as shown in FIG. 3, each clutch pawl 16 and the engaging pawl 1
It is set so that the position 7 and the position 7 are exactly engaged with each other.

On the other hand, the upper end of the compression spring 14 for urging the cam sleeve 12 downward is fixed by a bolt 31 and stopped by a pin 33 in a brake mechanism 30 formed in the cover 3, as shown in FIG. It is held by a disc-shaped brake holder 32, and a ring-shaped brake shoe 34 is attached to the lower surface of the brake holder 32. In addition, the brake holder 32 itself also has a compression spring 35.
It is urged downwards by and can descend until it contacts the head of the bolt 31. Reference numeral 36 is a washer with which the lower end of the compression spring 14 abuts, and 37 is a holder that is press-fitted into the upper end of the cam sleeve 12. Therefore, when the driven shaft 10 is raised together with the sleeve 21 by operating the lever 29, the cam sleeve 12 is also raised against the bias of the compression spring 14 by the C ring 15 which is prevented from coming off, and the holder 37 is moved as shown in FIG. Brake shoe 3 through
It is configured to abut against No. 4.

The operating state of the rotating mechanism 5 of the large depositing machine 1 thus constructed will be described mainly with reference to FIGS. Note that the description will be given mainly on the side of the alibit 26, and the operation of the clutch mechanism portion is shown enlarged in the side of each drawing. Here, the contact piece 38 is fixed to the upper end of the outer periphery of the sleeve 21, and the contact piece 38 descends as the sleeve 21 descends to turn on the limit switch 39 provided inside the housing 4, and the motor circuit is generated by this detection signal. The configuration in which the electromagnetic main switch is turned on is adopted. The timing for turning on the limit switch 39 is set to the lowered position of the sleeve 21 in which the clutch pawl 16 of the cam sleeve 12 is completely engaged with the engaging pawl 17 of the clutch cam 9, so that the motor is set at the position shown in FIG. The driven pulley 6 does not rotate even if the drive switch is turned ON. Then, as shown in FIG. 8, when the sleeve 21 is lowered by the lever 29, the cam sleeve 12 is urged by the compression spring 14 by the descent of the driven shaft 10.
Also descends at the same time. Here, the contact surface 1 of each clutch pawl 16
There is no problem when 6a is in a proper meshing position where it abuts the contact surface 17a of the engaging pawl 17 on the clutch cam 9 side, but in other cases, for example, the clutch pawl 16 and the engaging pawl 17 are provided.
Even if the facing surfaces 16b and 17b of the key 11 are in contact with each other, the lower end 11a of the key 11 that descends as the driven shaft 10 descends is guided to the passage groove 20 by the guide portion 18, In order to slightly rotate the driven shaft 10 and the cam sleeve 12 in the guide direction to correct the clutch claw 16 of the cam sleeve 12 and the engagement claw 17 of the clutch cam 9 to an appropriate position, as shown in FIG. At the same time when the key 11 passes through the passage groove 20, the contact surface 16a of the clutch claw 16 and the contact surface 1 of the engagement claw 17 are formed.
7a just comes into contact with and meshes with each other, so that the driven pulley 6 and the cam sleeve 12 are integrally rotatably connected. Further, since the limit piece 39 of the contact piece 38 is turned on at this position, the main switch is also turned on here, and the motor can be rotated by turning on the drive switch of the motor. Even if the sleeve 21 is lowered to the lower limit position as it is, the key 11 of the driven shaft 10 is guided in the key groove 13 of the cam sleeve 12, and only the driven shaft 10 and the alibit 26 are lowered, so that the cam sleeve 12 and the clutch cam 9 are separated from each other. The connection remains unchanged.

The left and right driven pulleys 6 are rotated by the rotation of the motor, but since only the cam sleeve 12 on the alibit side 26 is connected to the driven pulley 6, the straight bit 25 does not rotate and the alibit 26 side is not rotated. The rotation of the driven pulley 6 changes from the clutch cam 9 to the cam sleeve 1.
2, and then transmitted to the driven shaft 10, so that only the alibit 26 rotates. Further, after turning one bit as described above and cutting, when the drive switch of the motor is turned off, the driven pulley 6 is braked by the electric brake via the belt 7 and the driven shaft 10 in the connected state is also immediately stopped. However, when the drive switch is in the ON state and the sleeve 21 is raised by the lever operation and the limit switch 39 is turned OFF, the driven shaft 10 that rises at the same time pushes up the cam sleeve 12 by the C ring 15, so that the cam sleeve 12 12 is separated from the driven pulley 6 and the action of the electric brake is not transmitted, and the driven shaft 10 continues to rotate due to inertia. Then, the lever 29 is operated further upward to push the cam sleeve 12 against the brake shoe 34 of the brake mechanism 30 against the bias of the compression spring 14 as shown in FIG.
The cam sleeve 12 is braked by the friction with and the rotation is stopped immediately, and the driven shaft 10 and the alibit 26, which are integrated with the cam sleeve 12, are also stopped at the same time. Also sleeve 2
When 1 is raised, the contact piece 38 turns off the limit switch 39 at the same time as the cam sleeve 12 and the clutch cam 9 are separated from each other, so the electromagnetic main switch is also turned off, and the sleeve 21 is again operated by lever operation. Even if the limit switch 39 is turned on and the limit switch 39 is turned on, the motor does not rotate.

As described above, according to the present embodiment, the clutch mechanism allows the bit to rotate only after the bit on one side is lowered, so that the chips on the other side rotate during cutting. There is no problem of being caught in
You can also handle the large insertion processing machine with confidence. Further, the clutch mechanism for connecting the driven pulley 6 and the cam sleeve 12 has a structure in which the key 11 is always corrected to an appropriate connecting position for smooth connection, and the motor is required to be completely connected by linking with the limit switch 39. Since the driven pulley 6 is connected while being rotated, the claws do not collide with each other to generate a sound and the wear of the claws is not accelerated, and the connection is performed smoothly and surely. Then, the descending-coupling-rotating procedure is established. Further, by providing the brake mechanism 30 such as the brake shoe 34 on the upper side, the cam sleeve 12 and the driven shaft 10 can be reliably stopped even after the clutch mechanism is disconnected, and the next work due to the rotation of inertia can be performed. It does not cause a delay or the like.

The number and shape of the clutch pawls and the engaging pawls in the clutch mechanism, the arrangement position of the clutch mechanism, etc. are not limited to those in the above-described embodiment, and can be appropriately increased or decreased and the design can be changed. It is possible to form a clutch claw directly on the side or to make a simple meshing clutch that does not use a guide portion or passage groove.In addition to such a meshing clutch, other clutch mechanisms such as a plate clutch can be adopted. It doesn't matter. Further, the structure is not limited to the one in which the descending side is mechanically rotated independently by the clutch mechanism or the like as described above, and the abutting piece 38 and the limit switch 39 described above are subjected to large insertion processing without using the clutch mechanism. It may be implemented by other means, such as being independently adopted in the machine, enabling the motor to rotate by detecting a predetermined descending position, and electrically rotating the descending side independently. Further, in the embodiments described so far, the configuration is such that the bit cannot be rotated unless the bit is lowered. However, even if both bits are lowered, the driven shaft is allowed to rotate because they are connected to the driven pulley side, respectively. If one bit is lowered while the other bit is used due to forgetting to store it or the lever operation is troublesome, the bit not used may damage the work. Therefore, as disclosed in Japanese Patent Application No. 5-274317 by the applicant of the present application, if a stopper mechanism that prevents one bit from descending while the other bit is descending is provided, the bit will be forgotten. The operating procedure is established in which unused bits are stored in the housing side and only the necessary bits are lowered and rotated. That is, as shown in FIG. 10, in the stopper mechanism 40, a substantially fan-shaped stopper 42 pivotally supported so as to be horizontally rotatable about a pin 41 at the center between the left and right sleeves 21 and 21 as a fulcrum is rotated by an torsion spring 43. 26, a step portion 44 with a straight bit 25 side having a right angle in cross section and a step portion 45 having a taper shape on the alibit 26 side are formed on the curved surface of the side surface of the stopper 42, respectively. Is. Also 46 is
The bolt is in the elongated hole 42a of the stopper 42 and regulates the rotation range of the stopper 42. Therefore, Alibit 26
When the lever is operated to lower, the lower end of the sleeve 21 contacts the tapered step portion 45, and the stopper 42 is rotated toward the straight bit 25 side as shown by the chain double-dashed line to move the step portion 44 of the stopper 42. Is a straight bit 25
When the alibit 26 is lowered, the straight bit 25 is reached.
Becomes a structure that cannot descend. Conversely, straight bit 25
Is lowered, the rotation of the stopper 42 biased toward the alibit 26 side is restricted, and the tapered step portion 45 maintains the position where the sleeve 21 of the alibit 26 is prevented from lowering.

[0013]

As described above, according to the present invention, the rotation transmitting means for operating the spindle at the predetermined lowered position and permitting the rotation of the spindle is provided, so that the operation procedure for lowering and then rotating the bit is established. , The problem that the bit that has not been lowered rotates and entrains cutting chips is solved. Further, if the rotation transmitting means is a clutch mechanism including an engaging pawl formed on the driven pulley and a clutch pawl formed on the spindle side, the rotation transmitting means can be simply constructed. Further, if the clutch mechanism is provided with a positioning means for correcting the engagement position between the engagement claw and the clutch claw to an appropriate position,
The claws are smoothly meshed with each other. Further, if the positioning means is composed of a protrusion formed on the spindle and a passage groove formed on the driven pulley side and having a guide portion for guiding the protrusion, the meshing position can be corrected rationally. It will be done without difficulty. Further, if the clutch mechanism is provided with the electric detection means and the motor can be driven only when the lowered position of the spindle where the claws are engaged with each other is detected, the driven pulley is not connected to the spindle side while rotating. It is possible to prevent problems such as the generation of sound and increased wear of parts due to this. Further, if the clutch mechanism is provided with the braking means, it is possible to immediately stop the spindle which is disconnected, and rotation due to inertia does not occur. If the lower part of the spindle is pivotally supported by a sleeve that moves up and down together with the spindle, and the stopper member is provided between both sleeves, the other sleeve cannot be lowered when one spindle is in a lowered state. It is possible to prevent forgetting to store the bit and the resulting damage to the work.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a large insertion processing machine.

FIG. 2 is an explanatory view of only a rotation transmission mechanism from a motor as viewed from above.

FIG. 3 is an explanatory diagram of a clutch mechanism.

FIG. 4A is an explanatory view of the clutch cam seen from above. (B) It is the sectional view on the AA line. (C) It is a bottom view of a clutch cam.

FIG. 5 is an explanatory diagram of a brake mechanism.

FIG. 6 is an explanatory diagram of a brake mechanism.

FIG. 7 is an operation explanatory view of a rotation mechanism.

FIG. 8 is an operation explanatory view of a rotation mechanism.

FIG. 9 is an explanatory view of the operation of the rotating mechanism.

FIG. 10 is an explanatory diagram of a stopper mechanism.

[Explanation of symbols]

1 ... Large-insertion processing machine, 2 ... processing machine body, 5 ... rotation mechanism, 6 ... driven pulley, 7 ... belt, 9 ... clutch cam, 10 ... driven shaft, 11 ... key, 12
..Cam sleeve, 13..Key groove, 16..Clutch pawl, 17..Engagement pawl, 18..Guide part, 21..Sleeve, 25..Straight bit, 26..Alibit, 29..Lever , 30 ・ ・ Brake mechanism, 32 ・ ・
Brake holder, 34 ... Brake shoe, 39 ... Limit switch, 40 ... Stopper mechanism, 42 ... Stopper.

Claims (7)

[Claims] 1. A large-insertion processing machine in which a plurality of spindles, each of which is driven by a motor and rotated at its lower end, has a bit mounted at its lower end, are arranged side by side in a vertically movable manner on a main body of the processing machine. A large-insertion processing machine characterized in that it is provided with a rotation transmission means that operates at a position to allow rotation of the spindle. 2. An engagement claw formed on a driven pulley that is rotated by the motor drive of the rotation transmission means and is loosely fitted to each of the spindles, and a predetermined descending position of the spindle formed on the spindle side. 2. The large insertion processing machine according to claim 1, wherein the clutch mechanism includes a clutch pawl that meshes with the engaging pawl to transmit the rotation of the driven pulley to the spindle side. 3. When the engagement claw of the driven pulley and the clutch claw on the spindle side are engaged with the clutch mechanism, one of the driven pulley and the spindle is rotated to engage the clutch claw with the engagement claw. The large insertion processing machine according to claim 2, further comprising positioning means for correcting the meshing position to an appropriate one. 4. The positioning means is fitted into the engaging claw and the clutch claw at proper meshing positions to form a protrusion formed on the spindle and the driven pulley side. The large insertion processing machine according to claim 3, comprising a passage groove provided with a guide portion for guiding the protrusion. 5. The clutch mechanism is provided with an electrical detection means for detecting a lowered position of the spindle where the engagement claw and the clutch claw are meshed, and when the electrical detection means detects the lowered position. The large insertion processing machine according to claim 2, wherein only the motor can be driven. 6. The large insertion processing according to claim 2, wherein the clutch mechanism is provided with a brake means for stopping the rotation of the driven pulley by coming into contact with the spindle side of the driven pulley which is separated from the engaging claw of the driven pulley. Machine. 7. The lower part of the spindle is rotatably supported by a sleeve that moves up and down integrally with the spindle, and a locking portion is provided between the sleeves on a surface corresponding to each sleeve, and one sleeve descends. 7. The large insertion processing machine according to claim 1, wherein in the state, the locking portion on the other sleeve side is provided with a stopper mechanism for preventing the lowering of the sleeve.