JPH0783795B2 - Cloth cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to solve the following problems.

(Field of Industrial Application) The present invention relates to a cloth cutting machine configured to cut a large number of cloths (including carpets) together.

(Prior Art) In the conventional cloth cutting machine, a changeover switch for the drive motor is provided on the side surface of the main body, and the changeover switch is operated by one hand.
The drive motor is rotationally driven or stopped by switching it ON or OFF. However, in the above-mentioned conventional cloth cutting machine, since the changeover switch is arranged on the side surface of the main body, the cloth may touch the changeover switch during the cloth handling work to turn on the changeover switch, The knife could suddenly reciprocate, damaging the cloth or injuring the operator. Further, in the conventional cloth cutting machine, since the guard member is only guided vertically by the guide member of the main body, if the cloth is interrupted during the cutting of the cloth, the guard member falls, and the guard member is removed each time. There was the trouble of having to lift it and drop it on the cloth again.

(Problems to be Solved by the Invention) Except for the above-mentioned conventional problems, the present invention makes it possible to reciprocate the knife for the first time by performing two operations with different hands, and further, during the separation of the cloth while the operation is stopped. It is intended to provide a cloth cutting machine capable of preventing the cloth and a part of the body from unintentionally turning on the switch.

The configuration of the present invention is as follows.

(Means for Solving Problems) The invention of the present application employs means as described in the claims, and its operation is as follows.

(Operation) Operate the release operation piece of the switch operation prevention mechanism with one hand to move the prevention piece to the retracted position, and in that state, operate the switch operation piece of the switch operation mechanism with the other hand to operate the switch operation piece. When the switch is moved toward the switch, the switch actuating piece turns on the switch to operate the drive motor to reciprocate the knife. When the release operation piece is released with the switch operating piece turned on, the blocking piece comes into contact with the receiving member provided on the switch operating piece to prevent movement to the blocking position. Therefore, it is possible to cut the cloth by turning on the switch with only one hand holding the operation handle, and the other hand can be used for the cloth handling. When you release your hand from the switch operating piece, the switch operating piece moves back to turn off the switch, and the blocking piece returns to the blocking position to guard the front side of the switch.

(Example) Hereinafter, drawings showing an example of the present application will be described. In the cloth cutting machine 1 shown in FIGS. 1 to 4, 2 is a base that can be moved on a workbench (not shown), 3 is a pillar that is integrally erected on the base 2, and 4 is a pillar. It is a main body fixed to the upper part of 3. In the main body 4, 5 is a hollow box body, 6 is an operation handle integrally provided on the rear surface of the box body 5, the tip portion of which is a grip portion 6a that can be grasped by one hand, and the base portion is It constitutes the support portion 6b. Reference numeral 7 denotes a guide member integrally provided on the front surface of the box body 5, and has a rectangular guide hole 7a for guiding a guard member described later so as to be vertically movable. Next, 8 is a knife which is arranged on the front surface of the support column 3 so as to be vertically reciprocable, and 9 is a box body 5 for reciprocating the knife 8.
The cover 9a is provided integrally with the box body 5 by the drive motor disposed on the upper part of the. Drive shaft 9b of the drive motor 9
A crank 10 is wedged to the upper end of the knife 8, and the crank 10 is connected to the upper end of the knife 8 via a crank rod 11.
Reference numeral 12 is a switch arranged on the rear surface of the box body 5, and is composed of a switch box 12a fixed to the box body 5 and a switch piece 12b protruding from the switch box 12a. The switch piece 12b is a switch. When pushed into the box 12a side, the drive motor 9 is turned on, and when the push is released, the switch piece 12
b is returned to its original position by a spring or the like to turn off the power supply to the drive motor 9. Reference numeral 13 denotes a guard member that is arranged in the front of the knife 8 so as to be movable up and down. The guard member 13a guards the front of the knife 8 in the lowest position, and the presser foot 13b fixed to the lower portion of the guard member 13a. And the guard section
The sliding portion 13c is formed integrally with the upper portion of 13a and has a rectangular cross section. The sliding portion 13c is vertically slidably fitted in the guide hole 7a. Reference numeral 14 is a hooking piece fixed to the upper end of the guard member 13.

Next, as shown in FIG. 4, reference numeral 15 denotes a switch operation mechanism arranged on the rear side of the box body 5 so that the switch 12 can be turned on by one hand holding the operation handle 6. is there. In the switch operating mechanism 15, 16 is the supporting portion.
A switch lever pivotally attached to 6b via a pivot, and a hole 18b of an annular body 18a provided at an intermediate portion of the switch lever is fitted to a support portion 6b so that both sides are pivotally attached via pivots 17. Tilt lever 18
And a projecting piece 19 projecting from the upper end of the tilting lever 18 toward the switch 12, and an operation lever 20 projecting rearward from the lower part of the tilting lever 18. Reference numeral 21 denotes a return spring interposed between the operation lever 20 and the operation handle 6 so as to return the operation lever 20 to the state shown in FIG. Reference numeral 22 is a contact piece integrally provided near the upper end of the tilting lever 18 so as to project toward the switch side, and has a roller 23 rotatable at its tip end about the axis passing through the axis of the support 6b. Is supported. Reference numeral 25 denotes a switch actuating piece which is arranged at a position facing the switch 12 so as to be movable in the distance and to the switch 12, and is constituted by the projecting piece 19. Reference numeral 26 denotes a switch operation piece arranged around the operation handle 6 so as to be movable in the distance from and to the operation handle 6, and is constituted by the operation lever 20. The switch operating piece 26 can be moved to the side of the operating handle 6 by grasping the operating handle 6 together, and is normally returned to a position far from the operating handle 6 shown in FIG. is there. 27 is a connecting member that connects the switch operation piece 26 and the switch operation piece 25, and is the tilt lever.
It is composed of 18. The connecting member 27 causes the switch operating piece 25 to turn on the switch 12 when the switch operating piece 26 is moved to the operation handle 6 side, and when the movement of the switch operating piece 26 is released, the switch operating piece 26 moves away from the operation handle 6. The switch actuating piece 25 is configured to turn off the switch 12 by returning to the side.

Next, 28 is a switch operation preventing mechanism disposed on the rear side of the box body 5, which normally prevents the switch operation piece 25 from moving in the switch direction and guards the switch piece 12b slightly in front of it. The operation of the switch 12 is blocked, and when necessary, the switch operating piece 25 is allowed to move in the switch direction so that the switch 12 can be operated. In the switch operation preventing mechanism 28, a stop lever 29 is attached to the supporting portion 6b so as to be rotatable about its axis, and a rotating body 30 having its hole 30a fitted to the supporting portion 6b.
And a receiving plate 31 which is projected upward from the upper part of the rotating body 30 and has a flat surface on the switch lever 16 side thereof, and a receiving plate.
A guide surface 32a of the switch lever 16 is provided on the tip end of 31 so as to project toward the blocking position, and a guide surface 32a of the switch lever 16 is formed on an inclined surface toward the switch as it goes to the tip as shown in FIG. The guide piece 32 and the tip end surface of the receiving plate 31 are covered slightly before the switch piece 12b at the blocking position described later, and project so as to allow the switch actuating piece 25 to move in the switch direction at the retracted position described later. Cover plate 33 and rotating body
It is composed of an operating lever 34 that extends laterally from the lower part of 30. Reference numeral 35 denotes a return spring, one end of which is fixed to the support portion 6b and the other end of which is fixed to the operation lever 34.
Is returned to the state shown in FIG. Reference numeral 36 denotes a blocking piece constituted by the receiving plate 31 for releasing the receiving position of the roller 23 and the blocking position for blocking the movement of the switch operating piece 25 in the switch direction by receiving the roller 23. Thus, the switch operating piece 25 is movably arranged in a retracted position that allows the switch operating piece 25 to move in the switch direction. Reference numeral 37 is a releasing operation piece which is reciprocally movable in the main body 4 and is normally arranged so as to be returned to one side, and is constituted by the tip portion of the operation lever 34. 38 is a connecting member that connects the blocking piece 36 and the release operation piece 37.
When 37 is moved downward, the blocking piece 36 moves to the retracted position for releasing the reception of the roller 23 as shown in FIG. 6, and when the movement of the releasing operation piece 37 is released, the releasing operation piece 37 returns upward. The blocking piece 36 is moved to a blocking position for receiving the movement of the roller 23 in the switch direction as shown in FIG.

Next, 39 is a receiving member provided on the switch operating piece 25,
The cover plate 33 is formed by the tip of the overhanging piece 19 and the switch operating piece 25 turns on the switch 12.
To prevent movement of the blocking piece 36 to the blocking position.

Next, 40 is a holding / releasing mechanism arranged laterally of the main body 4 as shown in FIGS. 3 and 5, which holds and holds the guard member 13 while the switch 12 is ON. , Switch 12 OF
While in F, the locking and holding of the guard member 13 is released. In the holding / releasing mechanism 40, 41 is a fitting insertion hole provided in the guide member 7, which is opened at a right angle to the guide hole 7a. Reference numeral 42 is a locking pin that is slidably inserted in the fitting insertion hole 41 in the axial direction. A tapered locking portion 42a is provided at one end and a pair of engaging flanges 42b are provided at the other end. It has been opened. Reference numeral 43 denotes a locking piece which is movable to a holding position for holding the sliding portion 13c of the guard member 13 on the guide member 7 and a releasing position for releasing the sliding portion 13c, and is constituted by the locking pin 42. There is. Reference numeral 44 is a connecting member that connects the locking piece 43 and the switch operation blocking mechanism 28. When the blocking piece 36 is moved to the blocking position, the locking piece 43 moves to the release position and the blocking piece 36 retracts. When moved to the position, the locking piece 43 is moved to the holding position. In the connecting member 44,
Reference numeral 45 is a holding / releasing lever whose middle portion is rotatably pivotally attached to the box body 5 through a pivot 50 on a horizontal plane, one end of which is between the engaging collars 42b and 42b of the locking pin 42. , And the other end extends to the side of the operation handle 6. Reference numeral 46 is a spring interposed between the holding / releasing lever 45 and the box 5, and the holding / releasing lever is arranged so that the locking pin 42 abuts on the guard member 13.
We are pushing 45. Reference numeral 47 is a rotary lever projecting from the rotary body 30 of the switch operation preventing mechanism 28, and has a tapered operating surface 47a at the tip end thereof, the distance from the center of rotation being gradually increased toward the tip. Has been formed. When the blocking piece 36 is moved to the blocking position as shown in FIG. 4, the operating surface 47a comes into contact with the holding / releasing lever 45 and swings the holding / releasing lever 45 against the spring 46, thereby blocking the blocking piece. 36 to 6
As shown in the figure, when the holding release lever 45 is moved to the retracted position, the swing of the holding release lever 45 is released and the locking piece 43 is moved to the holding position.

In the case of the above-mentioned configuration, when performing cloth cutting, the operating handle 6 is operated to position the knife 8 so as to face the edge portion of the cloth to be cut, and then the operating handle is first operated with one hand. With 6 held, the release operation piece 37 of the switch operation preventing mechanism 28 is pushed downward with the other hand to rotate the stop lever 29 as shown in FIG. The cover plate 33 is moved to a retracted position that does not face the switch operating piece 25, and the cover plate 33 is moved to a retracted position that does not face the switch operating piece 25. In the above case, even if the switch operating piece 26 is held together with the hand holding the operation handle 6 to rotate the switch lever 16 and the roller 23 is in contact with the flat surface of the blocking piece 36, the roller Since 23 is rotatable, the blocking piece 36 can be smoothly moved to the retracted position. Also, as described above, stop lever 29
When is turned, the turning lever 47 of the holding / releasing mechanism 40 is also turned in the same direction as a unit, and as a result, the operating surface 47a of the turning lever 47 moves from the holding / releasing lever 45 as shown in FIG. Release and rotate the holding release lever 45 by the spring 46,
As a result, the holding release lever 45 pushes the locking piece 43 and holds the guard member 13. Next, the operator holds the switch operating piece 26 of the switch operating mechanism 15 together with the hand holding the operating handle 6 to rotate the switch lever 16 against the spring 21 as shown in FIG. Actuating piece 25 pushes switch piece 12b of switch 12, resulting in switch 1
2 energizes the drive motor 9 to rotate its drive shaft 9b,
Move the knife 8 up and down. After that, when the pushing down of the release operation piece 37 is released, the stop lever 29 is rotated in the returning direction by the spring 35, but the receiving member 39 receives the cover plate 33 and is stopped in the middle of returning. Therefore, the reciprocating state of the knife 8 due to the operation of the drive motor 9 can be maintained only by one hand holding the operation handle 6 and the switch operation piece 26. In the above state, as described above, the holding release lever 45 pushes the locking piece 43 with the spring 46, and the locking pin 42 locks the guard member 13, but the index finger of the right hand holding the operation handle 6. Holding release lever 45 etc.
When you pull one end of the
43 is slightly pulled out, and the locking holding of the guard member 13 is released by the locking pin 42. As a result, since the guard member 13 can be freely moved up and down, the guard member 13 is lifted by the hooking piece 14 by the open left hand to position the cloth below the presser foot 13b, and then the lifting of the guard member 13 is released. , Press the work clamp 13b to the top of the cloth. Then, when the index finger is released from the holding / releasing lever 45, the holding / releasing lever 45 pushes the locking piece 43 again to lock and hold the guard member 13, and the cloth presser 13b is moved to a height corresponding to the thickness of the cloth. maintain.
Therefore, even if the cloth is cut off during the cloth cutting operation or the cloth cutting machine 1 is temporarily separated from the cloth, the cloth presser 13b can be prevented from dropping and the cutting operation can be facilitated. Then, the cloth can be cut by the knife 8 by moving the cloth cutting machine forward on the work table with the hand holding the operation handle 6. In that case, the other hand can be used for handling.

Next, when the cloth cutting operation is finished and the reciprocating motion of the knife 8 is stopped, when the hands holding the operation handle 6 and the switch operation piece 26 are released, the switch lever 16 is returned and rotated by the spring 21. Return the switch operating piece 25 to the original position shown in FIG. 4, and as a result, the switch operating piece 25 moves the switch 12
Turn it off. At the same time, the cover plate 33 is disengaged from the receiving member 39 and the stop lever 29 is returned and rotated by the spring 35. As a result, the cover plate 33 is positioned slightly before the switch piece 12b and covers the switch piece 12b. The blocking piece 36 is moved to the blocking position facing the roller 23. Therefore, in the state in which the drive motor 9 is stopped as described above, the cover plate 33 is located slightly in front of the switch piece 12b. Even if it is moved toward, the cover plate 33 can receive the cloth and a part of the body, and as a result, the switch 12
Accidents that accidentally turn ON can be prevented. Further, even when the cloth or body comes into contact with the switch lever 16 to rotate the switch lever 16, the roller 23 comes into contact with the blocking piece 36 to prevent the switch lever 16 from rotating, and as a result, the switch operating piece 25. Can prevent the accident that the switch 12 is turned on carelessly. Also, as described above, the stop lever 29 is a spring.
When returned by 35, the taper-shaped operating surface 47a of the rotating lever 47 abuts the holding release lever 45 as shown in FIG. 5, pulling the holding release lever 45 against the spring 46,
As a result, the holding release lever 45 pulls out the locking piece 43 to release the locking holding of the guard member 13. As a result, the guard member
Even when the knife 8 is in the raised state, the guard member 13 falls to the lowermost portion by its own weight and guards the front of the knife 8,
It is safe because it is difficult for your hands to touch. In the present application, the contact piece 22 and the roller 23 are omitted, and the blocking piece is received by the receiving plate 31.
Instead of the cover plate 33, the cover plate 33
Alternatively, the switch actuating piece 25 may be received. Further, the receiving member may be constituted by the roller 23, and the roller 23 may receive the guide piece 32. Furthermore, the cover plate 33 of the above embodiment is elongated to the right, and a window hole or a cutout into which the switch actuating piece 25 can be inserted is provided at a position biased to the elongated portion side, and the stop lever 29 is provided.
The switch 12 may be turned on by slightly rotating the switch counterclockwise.

(Effect of the invention) As described above, in the present invention, when the cloth is cut, the releasing operation piece 37 is operated by one hand to move the blocking piece 36 to the retracted position, and the other hand is operated. By gripping the operation handle 6 and the switch operation piece 26 together and moving the switch operation piece 26 to the operation handle 6 side, the switch 12 can be turned on for the first time and the knife 8 can be reciprocated. Therefore, in a state in which the operation of the cloth cutting machine 1 is stopped, it is possible to prevent an accident in which the cloth during the cloth separating work moves the switch operating piece 25 to turn the switch 12 on, and the knife 8 is operated when not scheduled. There is a safety effect that can prevent the risk of reciprocating movement. Moreover, even if the knife 8 can be reciprocated for the first time by using both hands as described above,
After the switch actuating piece 25 has turned on the switch 12, even if the release operation piece 37 is released, the blocking member 36 can receive the movement of the blocking piece 36 to the blocking position by the receiving member 39. 25 can keep the switch 12 turned ON, and the cloth cutting machine 1 can be held with one hand holding the operation handle 6.
There is an effect that you can operate and use the other hand for loosening.
Even if the cutting machine 1 can be operated with one hand as described above, the switch actuating piece 25 can be moved away from the switch 12 by releasing the hand from the cutting machine 1. Switch 12 can be turned off, switch 12
The ON / OFF operation of the switch can be simplified, and the blocking piece 36 can be moved to the blocking position. As a result, it is possible to prevent the cloth from moving the switch actuating piece 25 and turning on the switch 12 during the cloth handling work. Yes, and the switch operating piece 25 is a switch
Since the switch actuating piece 25 is located on the front surface of the switch 12, there is an effect that it is possible to prevent an accident in which the switch 12 is guarded by the switch 12 and the cloth or a part of the body directly hits the switch to turn on the switch.

Further, when the blocking piece 36 of the switch operation blocking mechanism 28 is moved to the retracted position, the locking piece 43 of the holding and releasing mechanism 40 can be moved to the holding position, and the guard member 13 can be held at that height position, and as a result, the cutting operation can be performed. Inside, the guard member 13 can be held so as not to drop, and the cloth cutting operation can be easily continued.

Further, even if the guard member 13 can be held at the height position as described above, the switch operation preventing mechanism
When the blocking piece 36 of 28 is moved to the blocking position, the locking piece 43 can be moved to the release position and the guard member 13 can be dropped. As a result, the guard member 13 is always knifed when the switch 12 is turned off. It can be located in front of 8 and protects the knife and is safe.

[Brief description of drawings]

The drawings show an embodiment of the present application. FIG. 1 is a side view, FIG. 2 is a front view showing a partial cross section, and FIG. 3 is III-III.
FIG. 4 is a perspective view showing a main part viewed from the opposite direction, and FIG. 6 is a perspective view showing an operating state. 1 ... Cutting machine, 2 ... Base, 3 ... Strut, 4 ... Main body, 6 ... Operation handle, 7 ... Guide member, 8 ... Knife, 9 ... Drive motor, 12 ... Switch, 13 …… Guard member, 13b …… Presser foot, 13c …… Sliding part, 15 …… Switch operating mechanism, 25 …… Switch operating piece, 26 …… Switch operating piece, 27 …… Connecting member, 28 …… Switch Actuation blocking mechanism, 36
...... Blocking piece, 37 ...... Release operation piece, 38 ...... Connecting member, 39 ...
… Receiving member, 40 …… Holding and releasing mechanism, 43 …… Locking piece, 44…
… A connecting member.

Claims (2)

[Claims] 1. A pillar is erected on a base which can be moved on a work table, and a main body having an operation handle is fixed to the upper part of the pillar, and a cloth cutting is provided on the front side of the pillar. A knife for reciprocating, a drive motor for reciprocating the knife in the main body, and a switch for the drive motor. The main body is provided with a switch operation mechanism and a switch operation blocking mechanism, respectively, and the switch operation mechanism is provided at a position facing the switch, the switch operation piece being arranged so as to be movable relative to the switch. Arranged so that it can be moved near and far with respect to the operating handle, is normally returned to a distant position, and can be moved to the operating handle side by grasping the operating handle together. ON and one switch operating piece, the switch operating piece and the switch operating piece, moving the switch operating piece to the operating handle side switch actuating piece switch
When the switch operation piece is released, the switch operation piece returns to the side away from the operation handle, and the switch operation piece is connected to the switch so that the switch is turned off. The operation blocking mechanism includes a blocking piece movably arranged in a blocking position that blocks the switch operating piece from moving in the switch direction and a retracted position that allows the movement, and is reciprocally movable in the main body. Moreover, normally, when the releasing operation piece arranged to be returned to one side, the blocking piece and the releasing operation piece are moved to the other side, the blocking piece moves to the retracted position,
When the release operation piece is released, the release operation piece returns to one side and the blocking piece is connected to the blocking position so that the blocking piece moves to the blocking position. A cloth cutting machine provided with a receiving member configured to prevent the blocking piece from moving to the blocking position in a state where the switch is turned on. 2. A column is erected on a base that is movable on a workbench, and a main body having an operation handle and a guide member for guiding a guard member is fixed to the upper portion of the column, and the column is fixed. A cloth cutting knife is reciprocally arranged in front of the machine, and a drive motor for reciprocating the knife and a switch for driving the knife are arranged in the main body. A guard member for guarding the knife is provided in front of the knife so as to be movable up and down. The guard member is provided with a cloth presser at its lower end and is vertically guided by the guide member at its upper end. In a cloth cutting machine provided with a sliding portion, a switch operating mechanism, a switch operation inhibiting mechanism, and a holding / releasing mechanism are respectively provided in the main body, and the switch operating mechanism is located at a position facing the switch. To The switch operating piece, which is arranged so that it can be moved far and far with respect to the switch, can be moved far and near the operation handle around the above-mentioned operation handle and is normally returned to a distant position. Switch operation piece arranged so that it can be grasped and moved to the operation handle side, the switch operation piece and the switch operation piece, and when the switch operation piece is moved to the operation handle side, the switch operation piece turns on the switch. When the switch operation piece is released, the switch operation piece returns to the side away from the operation handle, and the switch operation piece is connected to the switch so that the switch is turned off. The actuation prevention mechanism prevents the switch actuation piece from moving in the switch direction just before the switch and the movement thereof. A blocking piece movably disposed in a retracted position that allows movement, a release operation piece reciprocally movable in the main body and normally arranged to return to one side, and the blocking piece. If the release operation piece is moved to the other side, the blocking piece moves to the retracted position, and if the release operation piece is released, the release operation piece returns to one side and the blocking piece retracts. It is composed of a connecting member that is connected so as to move to the position, and the above-mentioned switch actuating piece is a receiving member that prevents movement of the blocking piece to the blocking position while the switch operating piece is in the ON state of the switch. A retaining member is provided, and the holding / releasing mechanism is movable to a holding position for holding the sliding portion of the guard member on the guide member and a releasing position for releasing the sliding portion; The stop piece blocks the stop piece and the switch operation prevention mechanism described above. When moved to location engaging piece is moved to the release position,
A cloth cutting machine comprising: a connecting member that connects the blocking piece to the holding position when the blocking piece is moved to the retracted position.