TWI590936B - Cutting device - Google Patents

Description

Cutting device

The present invention relates to a cutting device for cutting a continuous fastener chain at a predetermined position, the continuous fastener chain having a predetermined distance at one end of a gap portion of a fastener element row Block or separate parts.

It is known that a continuous zipper chain of a long strip is cut by traversing a void portion having no sprocket by a cutting device, thereby producing a slide fastener (for example, refer to Patent Document 1). Further, the zipper is composed of a plurality of types of fastener tapes, zipper teeth, stoppers, separate members, and sliders having different materials, shapes, widths, and lengths, and has a wide variety of types. Therefore, in the conventional cutting device in which the continuous zipper chain is cut at a predetermined position, a plurality of replacement parts are prepared for each of the plurality of parts, and each of the plurality of replacement parts is selected each time the type of the continuous zipper chain is changed. Replace and adjust the appropriate parts.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 7-79817

In addition, regarding the cutting device, in order to cut a plurality of continuous zipper chains, a plurality of knives and a base are prepared. In the past, there was a problem in that when the knife was changed, the position adjustment work of the knife was necessary each time, and after the knife was temporarily pressed against the base, the knife was fixed by screwing or the like, so that it takes a long time in the knife replacement work.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cutting device which can adjust the position of a blade without changing the blade, and can efficiently and reliably mount the blade in a short time.

The object of the present invention is achieved by the following constitution.

(1) A cutting device that cuts a continuous zipper chain at a predetermined position, in which a sprocket row disposed along an edge of a pair of fastener tapes is formed at a predetermined interval without zipper teeth a gap portion, and at least one end of the gap portion is provided with a stopper or a separating member, the cutting device is characterized by comprising: a conveying mechanism for conveying a continuous zipper chain; and a cutting mechanism having a continuous zipper chain a cut blade and a base, and a driving portion for driving the blade; and the cutting mechanism includes: a magnet having a contact surface by a magnetic attraction knife and mounted to the blade holder; and a fastening unit for adsorbing through the magnet The retained knife is removably mounted relative to the knife holder.

(2) The cutting device according to (1), wherein the magnet is fixed to the blade holder in advance in a state in which the magnetic attraction is held against the base.

(3) The cutting device according to (1), wherein the base includes: a flat portion that cooperates with the knife to cut the continuous zipper chain; and a receiving groove that is recessed from the flat portion in the continuous zipper chain a downstream side of the conveying direction and disposed in the width direction, and accommodating a stopper or a separating member, and the continuous zipper chain having the stopper is cut at a flat portion on the upstream side of the receiving groove, and the continuous zipper chain having the separating member The separator is placed in contact with the upstream side wall of the storage tub, and is cut off at the left and right flat portions of the storage tub.

(4) The cutting device according to (3), wherein the cutting mechanism further includes a component presser that presses an upper surface of the separate member housed in the receiving groove.

(5) The cutting device according to (1), comprising: an operating lever for operating the base holder, the base holder for fixing the base to the base stopper, and the operating lever is mounted A safety cover that covers the front surface side of the blade when the base holder is operated as the operation lever operates.

(6) The cutting device according to (5), wherein the operating lever moves the driven roller provided in the conveying mechanism while the base holder is operating, and another safety cover is attached to the operating lever. The other safety cover covers the hole for the tool insertion when the base holder is operated as the operation of the operation lever, and the tool is used to fasten or release the fastening unit of the knife.

According to the cutting apparatus of the present invention, the cutting mechanism includes: a magnet having a contact surface by the magnetic attraction knife and being attached to the blade holder; and a fastening unit for attaching the knife held by the magnet to the blade holder, Therefore, it is not necessary to adjust the position of the blade when the blade is replaced, and the blade can be mounted efficiently and reliably in a short time.

1, 1A, 1B, 1C‧‧‧Continuous zipper chain

2‧‧‧Chain

2a‧‧‧With side edge

3‧‧‧ sprocket

4‧‧‧Chain row

5‧‧‧Voids

6‧‧‧stops

7, 7A‧‧ separate parts

7B‧‧‧Reversal

9‧‧‧ long hole

10‧‧‧cutting mechanism

20‧‧‧Transportation agency

21A, 21B‧‧‧Transport roller

22A, 22B‧‧‧ drive roller

23A, 23B‧‧‧ driven roller

24‧‧‧1st cylinder

24a‧‧‧Piston rod

24b‧‧‧L-shaped member

25‧‧‧ Roller support

26‧‧‧2nd cylinder

26a‧‧‧Piston rod

26b‧‧‧L-shaped member

27‧‧‧ Roller support

28‧‧‧Void sensing sensor

29‧‧‧Sensing roller

30‧‧‧swing rod

40‧‧‧Chain guiding mechanism

41A, 41B‧‧‧Chain guides

42A, 42B‧‧‧ Guide body

42c‧‧‧cutting section

42d‧‧‧ front face

43A, 43B‧‧‧ pin support

44‧‧‧Chain width adjustment member

44a, 44b‧‧‧ upper and lower surfaces

45‧‧‧Base

46‧‧‧Base

46a‧‧‧ upper surface

46b‧‧‧ slot

46c‧‧‧slit

47‧‧‧Support members for guides

47a‧‧‧lower surface

48‧‧‧ Track

49‧‧‧Sliding parts

50‧‧‧cut section

51‧‧‧1st fitting hole

52‧‧‧1st card pin

60‧‧‧Chain blocking mechanism

61‧‧‧Chain block

61a‧‧‧ front end

61b‧‧‧ Backend section

62‧‧‧ Activity base

63‧‧‧Chain block drive unit

64‧‧‧Line guides

64a‧‧ Track

64b‧‧‧Sliding parts

65‧‧‧Support pin

66‧‧‧1st link

67‧‧‧2nd link

68‧‧‧Piston rod

68a‧‧‧Connected components

69‧‧‧Support pin

70‧‧‧2nd link

70a‧‧ pin hole

71a, 71b‧‧ sales

72‧‧‧ coil spring

73‧‧‧ stretching spring

74‧‧‧1st blocking screw

75‧‧‧2nd blocking screw

76‧‧‧1st block

77‧‧‧2nd stop

78‧‧‧Chain block detection unit

78a‧‧‧2-fork detection department

79‧‧‧Connected components

80‧‧‧Block support members

81‧‧‧ incision

82‧‧‧ Position adjustment components

82a‧‧‧ end face

83‧‧‧2nd card pin

84, 84a, 84b‧‧‧2nd fitting hole

85‧‧‧ Keeping Department

90‧‧‧cutting mechanism

91, 91A‧‧‧Upper

91a‧‧‧Upper surface

91B, 91C‧‧‧

92‧‧‧Base

92a‧‧‧ inside side

93‧‧‧ cylinder

94‧‧‧Upper knife holder

95‧‧‧ magnet

95a‧‧‧Contact surface

96‧‧‧ piston rod

97‧‧‧Cylinder connector

98‧‧‧Upper holder support

98a‧‧‧ Word slot

99‧‧‧ bolt

101‧‧‧U-shaped slot

102‧‧‧Bolts (fastening unit)

103‧‧‧blade

103a‧‧‧Unslot

104, 104a, 104b‧‧‧ base block

106‧‧‧ cylinder

107‧‧‧ piston rod

108‧‧‧Base holder

108a‧‧‧Locking

109‧‧‧Safety cover

111‧‧‧ Flat section

112‧‧‧ Containment trough

112a‧‧‧ upstream side wall

113‧‧‧ Word slot

114‧‧‧Magnetic screws

115‧‧ ‧ sales

120‧‧‧Parts and presses

121‧‧‧Parts pressing rod

121a‧‧‧One end of the component pressing rod

121b‧‧‧The other end of the component press bar

122‧‧‧ axle pin

127‧‧‧Support members

124‧‧‧ stretching spring

125‧‧‧Blocking screws

130‧‧‧Operation lever

131‧‧‧Safety cover

132‧‧‧ hole

132a‧‧‧ openings

CL1, CL2‧‧‧ cut position

CP1, CP2‧‧‧ cut line

LA‧‧‧Transport direction length

L1, L2‧‧‧ interval

W, WA‧‧‧Width

S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23, S24, S25‧ ‧‧step

Fig. 1 is a perspective view of a cutting device of the present invention.

Fig. 2 is a front elevational view of the cutting device shown in Fig. 1;

Figure 3 (a) is a plan view showing a continuous zipper chain including a stopper and a cutting position thereof, and Figure 3 (b) is a plan view showing a continuous zipper chain including a separating member and a cutting position thereof, Fig. 3 (c) It is a plan view showing the continuous zipper chain including the reverse member and its cutting position.

4(a) to 4(c) are a front view and a side view of various upper blades used for cutting the continuous fastener chain.

Fig. 5 is a plan view and a side view of various bases used in cutting a continuous fastener chain.

Fig. 6(a) is a plan view of a chain guide mechanism adjusted in width in accordance with a wide chain belt, and Fig. 6(b) is a cross-sectional view taken along line A-A of Fig. 6(a) and a rear view of the chain width adjusting member.

Figure 7 (a) is a chain guiding mechanism that adjusts the width corresponding to a narrow chain strap In the plan view, Fig. 7(b) is a cross-sectional view taken along line B-B of Fig. 7(a) and a rear view of the chain width adjusting member.

Figure 8 is a front elevational view showing the configuration of the chain blocking mechanism and the continuous fastener chain.

Fig. 9(a) is a left side view of the chain blocking mechanism shown in Fig. 8, and Fig. 9(b) is a right side view.

Fig. 10 is a front elevational view showing the chain blocking mechanism in a state in which the chain stopper is advanced.

(a) to (c) of FIG. 11 are enlarged views of main parts showing a detection state of the chain stopper detected by the chain stopper detecting unit.

Fig. 12 is a front elevational view of the chain blocking mechanism for adjusting the position of the chain block to the front position by the position adjusting member.

Fig. 13 (a) is a front view of the cutting mechanism, and Fig. 13 (b) is a side view of the cutting mechanism.

14(a) and 14(b) are enlarged views illustrating a method of attaching the upper blade and the base.

Figure 15 (a) is a front view and a side view of the base that has been fixed to the base block by the base holder, and Figure 15 (b) is a base fixed to the base of the base block by the base holder. Front view and side view.

Fig. 16 is a flow chart showing the operational sequence of the cutting device.

Fig. 17 is a front elevational view showing the main part of the cutting device in a state in which the chain stopper is stopped at the advanced position by the conveyance of the continuous fastener chain.

Figure 18 is a view showing the next state of Figure 17 showing the spring force of the spring A front view of a main portion of the cutting device in a state in which the zipper chain is retracted together with the chain stopper and stopped at the cutting position where the separating member is housed in the accommodating groove.

Hereinafter, an embodiment of the cutting device of the present invention will be described in detail based on the drawings. In the following description, in the continuous fastener chain, the upstream side is the transport direction of the continuous slide chain near the front side (the left side in FIG. 2), and the downstream side is the rear side of the transport direction of the continuous slide chain (Fig. 2 is the right side), the right side is set to the right direction toward the downstream side of the continuous zipper chain, the left side is set to the left direction, and the direction orthogonal to the conveyance direction and the left-right direction is the vertical direction.

<Schematic configuration of the cutting device>

First, the outline of the cutting device 10 of the present embodiment will be described with reference to Figs. 1 and 2 .

As shown in FIGS. 1 and 2, the cutting device 10 includes a conveying mechanism 20 that conveys the continuous fastener chain 1, a chain guiding mechanism 40 that guides the width direction of the continuous fastener chain 1 to be conveyed, and a chain blocking mechanism 60 that uses the chain stopper Block 61 positions the stop position of the continuous zipper chain 1; and the cutting mechanism 90 cuts the continuous zipper chain 1. The cutting device 10 guides the continuous fastener chain 1 intermittently conveyed by the conveying device 20 by the chain guide mechanism 40, and is cut at a predetermined cutting position by the cutting mechanism 90.

Further, as shown in Figs. 3(a) to 3(c), the continuous fastener chain 1 (1A, 1B, 1C) for cutting is along the opposite side edge portions 2a of the pair of long chain belts 2 And having the element rows 4 provided with the sprocket 3, and removing the element rows 4 at regular intervals The void portion 5 is formed. A stopper 6, a separating member 7A or a reversing member 7B is attached to one end of the gap portion 5. The gap portion 5 is a portion where the fastener element 3 is not attached to the fastener tape 2 from the start, or the fastener element 3 attached to the fastener tape 2 is removed, and the belt side edge portion 2a faces.

The cutting position of the continuous fastener chain 1 is cut at different positions in accordance with the stopper 6, the spacer 7A or the reverse member 7B attached to one end of the gap portion 5. Specifically, as shown in FIG. 3(a), the continuous fastener chain 1A having the stopper 6 is cut at the upstream side of the stopper 6, that is, at the cutting line CP1 substantially in the middle of the gap 5. . As shown in Fig. 3 (b) and Fig. 3 (c), the continuous zipper chain 1B having the split member 7A and the reverse member 7B (hereinafter sometimes collectively referred to as the split member 7) and the continuous zipper chain 1C are cut at the line CP2. The portion is cut, and the extension line of the cutting line traverses the separating member 7 and passes through the long hole 9 formed at the upstream end portion of the gap portion 5.

In addition, in FIGS. 3(a) to 3(c), as the continuous fastener chain 1, a continuous zipper of a plurality of individual metal fastener elements 3 including the back side edge portion 2a of the clamped chain belt 2 is provided. Although the chain is illustrated, it may be a continuous fastener chain including a plurality of individual resin fastener elements, or a continuous fastener chain including continuous fastener elements in which a resin monofilament is wound into a coil shape.

Further, as shown in FIGS. 4(a) to 4(c) and 5, the continuous fastener chain 1 (1A, 1B, 1C) having different specifications is formed by using the upper blade 91 and the base 92 which are suitable for each specification. Combined and cut at a given location. Specifically, a combination of a plurality of upper blades 91A, upper blades 91B, and upper blades 91C having different shapes or sizes and a plurality of bases 92 having different sizes of the housing grooves 112 can correspond to the various continuous fastener chains 1.

The upper blade 91A shown in Fig. 4(a) is used when the continuous fastener chain 1 uses any of the three types of fastener elements, and the upper blade 91A is formed in a zigzag shape. The blade portion 103 cuts the continuous fastener chain 1 in a zigzag shape substantially at the middle of the gap portion 5. The upper blade 91B shown in Fig. 4(b) is a separate sprocket or continuous sprocket in the case where the continuous zipper chain 1 has the separating member 7A in the case of using any of the three types of sprocket teeth. In the case where the reverse member 7B is used, the undercut groove 103a is formed in the center portion of the blade portion 103 in order to prevent the interference member 7A or the step 7B from being interfered. The upper blade 91C shown in FIG. 4(c) is used when the continuous fastener chain 1 uses a separate fastener element made of resin, and has a straight blade portion 103. Further, regarding the upper blade 91B, a plurality of sizes corresponding to the size of the separating member 7A are changed to change the size of the undercut groove 103a.

Further, as shown in FIG. 5, the base 92 has a flat portion 111 on the upper surface, and a receiving groove 112 recessed from the flat portion 111 at a position on the downstream side in the conveying direction of the continuous fastener chain 1, and a plurality of receiving grooves 112 are prepared. The width WA or the base of the flat portion 111 having a different transport direction length LA. The continuous zipper chain 1B having the split members 7 (7A, 7B) and the continuous zipper chain 1C (see Figs. 3(a) and 3(b)) are cut at the cutting position CL1 of the accommodating groove 112 traversing the base 92. . Further, the continuous fastener chain 1A having the stopper 6 is cut at the cutting position CL2 of the flat portion 111 which is separated from the accommodation groove 112 of the base 92 toward the upstream side. Further, a specific cutting process of the continuous zipper chain 1 will be described later in detail.

<transport mechanism>

As shown in FIG. 2, the conveying mechanism 20 includes a pair of cutting mechanisms 90, respectively. A pair of conveying rollers 21A and a conveying roller 21B on the upstream side and the downstream side. The conveying roller 21A and the conveying roller 21B which are disposed on the upstream side and the downstream side in the conveying direction of the continuous fastener chain 1 respectively include a driving roller 22A, a driving roller 22B, a driven roller 23A, and a driven roller 23B, and the driving roller 22A is used. The driving roller 22B, the driven roller 23A, and the driven roller 23B sandwich the continuous fastener chain 1 and rotationally drive the driving roller 22A and the driving roller 22B, thereby intermittently conveying the continuous fastener chain 1.

The driven roller 23A disposed on the upstream side is rotatably supported by the roller support 25, and is vertically moved by the operation of the first cylinder 24, which is connected to the piston rod of the first cylinder 24 (piston rod) The L-shaped member 24b of 24a is driven up and down. Further, the driven roller 23B disposed on the downstream side is rotatably supported by the roller support body 27, and is vertically moved by the operation of the second cylinder 26, which is coupled to the piston rod 26a of the second cylinder 26 The L-shaped member 26b is driven up and down.

The gap portion sensing sensor 28 is disposed on the upstream side in the transport direction from the upstream transport roller 21A. The sensing roller 29 of the gap portion sensing sensor 28 rolls on the fastener element 3 of the conveyed continuous fastener chain 1 and detects the presence or absence of the fastener element 3. That is, when the gap portion 5 of the conveyed continuous fastener chain 1 reaches the position of the sensing roller 29, the sensing roller 29 comes in and out of the gap portion 5, whereby the swing lever 30 to which the sensing roller 29 is attached is swung to detect the gap Department 5.

<Chain guide mechanism>

As shown in FIGS. 2 and 6(a) and 6(b), the chain guide mechanism 40 includes a guide holding member 47 that is flattened to the base 45 of the cutting mechanism 10. The upper portion of the table 46 is fixed to the base 45; the rail 48 is fixed to the lower surface 47a of the guide holding member 47, and is provided to extend in the left-right direction; a pair of chain guides 41A and chain guides 41B are fixed to the slide The slider 49 attached to the rail 48 is freely guided to guide the conveyed continuous fastener chain 1 , and the chain width adjusting member 44 is fitted to the slit portion 50 formed in the guide holding member 47 to change a pair of chain guides. The distance between the member 41A and the chain guide 41B in the left-right direction.

That is, the pair of chain guides 41A and the chain guides 41B are fixed to a pair of sliders 49 that are separated in the left-right direction. Each of the chain guides 41A and 41B fixed to the pair of sliders 49 moves together with the sliders 49 on the rails 48 in the left-right direction.

A pair of chain guides 41A, 41B, which are separated in the width direction of the chain belt 2, have a guide body 42A, a guide body 42B, and are screwed to the upper surfaces of the guide body 42A, the guide body 42B and A square rod-shaped pin support body 43A and a pin support body 43B which are provided to extend in the left-right direction. The pair of chain guides 41A and the chain guides 41B are movable between the upper surface 46a of the stage 46 fixed to the base 45 of the cutting device 10 and the lower surface 47a of the guide holding member 47, and are movable in the left-right direction. Ground configuration.

The pair of guide main body 42A and the guide main body 42B are formed with a notch portion 42c over the entire lower surface of the center side in the front-rear direction, and the pair of chain belts 2 are housed in the upper surface 46a of the platform 46 by the notch portion 42c. of In the groove, the both end faces of the chain belt 2 in the width direction are guided.

Further, in the above-described embodiment, the pair of chain guides 41A and the chain guides 41B adjust the end faces of the chain belt 2 in the width direction. In this case, the distance between the pair of chain guides 41A and the front end surface 42d of the chain guide 41B can be adjusted so that the end faces of the element rows 4 in the width direction are guided.

A groove 46b extending in the conveying direction (front-rear direction) of the continuous fastener chain 1 is formed at the center in the width direction of the stage 46, and the groove 46b accommodates the element row 4. Further, a slit 46c penetrating in the vertical direction is formed at the downstream end portion of the stage 46. In the slit 46c, the front end portion 61a of the chain stopper 61 to be described later can enter and exit from below.

The guide member holding member 47 is formed in a plan view. The notched portion 50 of the shape is fitted to the slit portion 50 as a block having a rectangular cross section, that is, a chain width adjusting member 44. In the upper and lower surfaces 44a and 44b of the chain width adjusting member 44, a pair of first fitting holes 51 as the first engaged portions, which are provided at different intervals L1 and L2, are formed. Further, the surface on which the pair of first fitting holes 51 are formed is not limited to the upper and lower surfaces 44a and 44b of the chain width adjusting member 44, and may be formed on four faces including the left and right side faces as needed.

Further, a pair of first engagement pins 52 as a first engagement portion are fitted to the pair of pin support bodies 43A and the pin support bodies 43B (the chain guides 41A and the chain guides 41B). The pair of first engagement pins 52 of the pin support body 43A and the pin support body 43B are fitted to any one of the first engagement holes 51 selected from the first fitting holes 51 formed in the upper and lower surfaces 44a and 44b of the chain width adjustment member 44. The hole 51 is fitted to define the interval between the pair of chain guides 41A and the chain guides 41B in the left-right direction.

Provided in the upper and lower surfaces 44a, 44b of the chain width adjusting member 44 The interval L1 and the interval L2 of the first fitting hole 51 are set corresponding to the width W (see FIG. 3) of the fastener tape 2 and the width of the fastener element 3. 7(a) and 7(b) are a plan view and a cross-sectional view of the chain guide mechanism 40 in which the widths of the pair of chain guides 41A and the chain guides 41B are adjusted corresponding to the narrow chain belt 2, by selecting intervals. The pair of first fitting holes 51 having a narrow L2 are fitted into the pin supporting body 43A and the first engaging pin 52 of the pin supporting body 43B, thereby changing the pair of chain guides 41A in accordance with the narrow chain 2; The interval of the chain guides 41B in the left-right direction. In other words, by selecting any pair of first fitting holes 51 in the plurality of pairs of first fitting holes 51 and fitting them to the first engaging pins 52, the pair of chain guides 41A can be adjusted without replacing peripheral parts or the like. The position of the chain guide 41B makes it possible to easily correspond to the continuous zipper chain 1 having a different width.

Further, after the chain width adjusting member 44 is detached from the slit portion 50, the pair of chain guides 41A and the chain guides 41B can be detached from the platform 46 together with the slider 49.

Further, a plurality of pairs of the first fitting hole 51 and the first engaging pin 52 may be formed. In addition, the first engaged portion of the chain width adjusting member 44 may be an engaging pin, and the first engaging portion of the chain guide 41A and the chain guide 41B may be a fitting hole.

<chain blocking mechanism>

As shown in FIGS. 8 to 10, the chain blocking mechanism 60 is a mechanism for positioning the transported continuous fastener chain 1 at a predetermined cutting position by the chain stopper 61, and the chain stopper 61 and the drive chain stopper. 61 chain stop drive unit 63 is provided On the movable base 62. The movable base 62 is guided by a linear guide 64 and is movable in the front-rear direction together with the chain stopper 61 and the chain stopper driving unit 63, and the linear guide 64 includes the conveyance of the continuous fastener chain 1. A rail 64a that is extended in the direction and fixed to the base 45, and a slider 64b that is fixed to the movable base 62 and slidably fitted to the rail 64a.

The chain stopper driving unit 63 has a four-node link mechanism including a first link 66 that is rotatably fitted to a support pin 65 fixed to the movable base 62, and a second link 70 a support pin 69 that is rotatably fitted to the coupling member 68a fixed to the piston rod 68 of the cylinder 67; the chain stopper 61 is respectively used by the pin 71a, the pin 71b, and the first link 66 and the second link 70 Connected at one end. The pin hole 70a of the second link 70 to which the pin 71b is fitted is a long hole that is long in the vertical direction, and a coil spring 72 is disposed between the pin 71b and the coupling member 68a, and the pin 71b is pressed upward. .

The first link 66 is biased in the counterclockwise direction by the tension spring 73. In other words, the chain stopper 61 is pressed in a direction opposite to the conveying direction of the continuous fastener chain 1 by the elastic force of the tension spring 73, and is movable in the front-rear direction. Further, the first link 66 is provided with a first blocking screw 74 and a second blocking screw 75, and is in contact with the first stopper 76 and the second stopper 77 provided on the movable base 62, respectively, so that the first link 66 The range of motion is limited.

The front end portion 61a of the chain stopper 61 is formed in a substantially hook shape bent upward by a thin plate. When the piston rod 68 of the cylinder 67 is extended, the chain stopper 61 is rotated counterclockwise about the support pin 65, and is driven from the platform. The slit 46c of 46 is upward It protrudes and can enter and exit in the gap portion 5 of the continuous fastener chain 1.

Further, when the chain stopper 61 is rotated or moved back and forth, the rear end portion 61b of the chain stopper 61 can advance and retreat between the binary detecting portions 78a of the chain stopper detecting portion 78 fixed to the movable base 62. Thereby, the chain stopper detecting unit 78 monitors the operation state of the chain stopper 61.

A rod-shaped connecting member 79 extending rearward is fixed to a lower portion of the movable base 62. Further, a block supporting member 80 that extends rearward along the upper surface of the connecting member 79 is fixed to the base 45. In the slit 81 formed in the block support member 80 and having a rectangular shape in a plan view, a position adjusting member 82 which is a block having a rectangular cross section is disposed.

A second engagement pin 83 as a second engagement portion is fitted to the upper surface of the coupling member 79. Further, on the respective surfaces of the position adjusting member 82, the second fitting holes 84 (84a, 84b) as the second engaged portions are formed at positions different from each other at a distance from the end surface 82a of the position adjusting member 82.

Further, the movable base 62 and the coupling member 79 constitute the holding portion 85 of the present invention.

Further, by selectively fitting the second engagement pin 83 of the coupling member 79 into any of the second fitting holes 84 of the position adjustment member 82, the movable base 62 is in the front-rear direction together with the chain stopper driving unit 63. The upper portion is moved to adjust the position of the chain stopper 61 in the front-rear direction by the position adjusting member 82.

Further, when the piston rod 68 of the cylinder 67 is extended and the front end portion 61a of the chain stopper 61 protrudes from the slit 46c of the stage 46, the chain stopper driving unit 63 The length of the piston rod 68 is adjusted in such a manner that the chain stopper 61 is substantially horizontal. In addition, the first link 66 is adjusted to be substantially vertical by the first blocking screw 74, and the first link 66 is adjusted such that the stroke of the chain stopper 61 in the front-rear direction becomes a predetermined distance by the second blocking screw 75. The range of motion.

As shown in FIG. 10, in the chain stopper driving unit 63, if the continuous fastener chain 1 is conveyed when the front end portion 61a of the chain stopper 61 enters and exits in the gap portion 5, the second blocking screw 75 contacts the second stopper. Before the 77th, the first link 66 and the second link 70 are rotated in the clockwise direction about the support pin 65 and the support pin 69 against the elastic force of the tension spring 73, and the chain stopper 61 is moved forward.

The movement of the chain stopper 61 can be detected by the chain stopper detecting portion 78. Specifically, as shown in FIG. 11(a), when the piston rod 68 of the air cylinder 67 is contracted and the chain stopper 61 is in the right oblique state, the rear end portion 61b is displaced from the binary detecting portion 78a to the upper state. . Further, as shown in Fig. 11 (b), when the piston rod 68 of the air cylinder 67 is extended and the chain stopper 61 is in the horizontal state, the rear end portion 61b enters between the two-shaped detecting portions 78a, so that the chain stopper 61 is detected. Out. Further, as shown in FIG. 11(c), when the chain stopper 61 advances against the elastic force of the tension spring 73, the rear end portion 61b is displaced forward from the binary detecting portion 78a and detected. Thereby, the state of the chain stopper 61 can be discriminated, and the conveyance mechanism 20 is controlled based on the signal from the chain stopper detection part 78.

The position of the chain stopper 61 in the front-rear direction is obtained by assembling the selected position adjusting member 82 to the slit 81 of the block supporting member 81 and selectively assembling the second engaging pin 83 and the second fitting hole 84. Adjustment. Figure 12 shows the second The engagement pin 83 is fitted into the second fitting hole 84 on the side far from the end surface 82a of the position adjustment member 82, and the movable base 62 and the chain stopper 61 are adjusted to the right side as compared with FIG. The position after the move. In this manner, the appropriate position adjusting member 82 is selected and assembled to the slit 81 of the block supporting member 80 in accordance with the type of the continuous fastener chain 1 having different cutting positions CP (see FIGS. 3( a ) to 3 ( c )). Thereby, the position of the chain stopper 61 is adjusted.

In addition, the second fitted portion of the position adjusting member 82 may be an engaging pin, and the second engaging portion of the connecting member 79 may be a fitting hole. In this case, a plurality of engaging pins may be disposed using a plurality of faces of the position adjusting member 82.

<cutting mechanism>

As shown in FIGS. 4( a ) to 4 ( c ), 5 , 13 ( a ), and 13 ( b ), the cutting mechanism 90 has a cooperative operation to cut the continuous fastener chain 1 at a predetermined position. The upper blade 91 and the base 92, and a cylinder 93 as a driving portion that drives the upper blade 91. The upper blade 91 is fixed to the upper blade holder 94 together with the positioning magnet 95. 13(a), 13(b), and 14(a) show a case where the upper blade 91A is attached, and the upper blade 91A is used for the continuous fastener chain 1A having the stopper 6, FIG. (b) shows a case where the upper blade 91B is attached, and the upper blade 91B is used for the continuous zipper chain 1B having the split members 7 (7A, 7B) and the continuous zipper chain 1C.

Further, although the cutting position CL2 of the continuous fastener chain 1A having the stopper 6 is different from the continuous fastener chain 1B having the separating member 7 and the cutting position CL1 of the continuous fastener chain 1C (refer to FIG. 5), as shown in FIG. a) and FIG. 14(b), the position of the blade portion 103 is changed by using the upper blade 91A and the upper blade 91B having different thicknesses. The same mechanism can be used for the response, so that the configuration of the cutting mechanism 90 is simplified.

The upper blade holder 94 is fitted to the upper blade holder support 98 fixed to the base 45. The word groove 98a is coupled to the piston rod 96 of the cylinder 93 via a cylinder joint 97. The upper blade holder 94 is guided by the upper blade holder support 98 by the operation of the air cylinder 93, and moves in the vertical direction together with the upper blade 91.

The positioning magnet 95 is formed in a square plate shape having a flat contact surface 95a which is in contact with the upper surface 91a of the upper blade 91 to position the upper blade 91, and the positioning magnet 95 is positioned by the pin 115 And fixed to the upper blade holder 94 by the two bolts 99.

The upper blade 91 has a U-shaped groove 101 that is open to the upper side of the upper blade holder 94 and a blade portion 103 that is formed at the lower end. The upper blade 91 is positioned by the magnetic attraction of the upper surface 91a to the contact surface 95a of the positioning magnet 95, and is fixed to the upper blade holder 94 by bolts 102.

A pair of base stoppers 104 (104a, 104b) are fixed to the base 45 below the upper blade holder support 98, and the pair of base stoppers 104 (104a, 104b) have an upper portion extending in the left-right direction. The base supports the groove 105. A base holder 108 that is coupled to the piston rod 107 of the cylinder 106 and moves up and down is disposed between the pair of base stoppers 104a and 104b. A locking portion 108a that protrudes into the base support groove 105 is provided at an upper portion of the base holder 108.

The base 92 has a flat portion 111 on the upper surface, and the flat portion 111 constitutes a cutting table that cooperates with the upper blade 91 to cut the continuous fastener chain 1. The flat portion 111 is formed to be open to the downstream side in the transport direction, which is formed by recessing from the flat portion 111 in a plan view. The font receiving groove 112. At a lower portion of the base 92, a locking portion 108a of the base holder 108 is formed. Word slot 113.

Referring to Fig. 15 (a), the base 92 is loosely fitted to the locking portion 108a projecting into the base support groove 105. The word groove 113 is slidably fitted to the base support groove 105, and is attached to the base stopper 104. In the base 45, the magnetic screw 114 is fixed to a position facing the inner side surface 92a of the base 92, and is magnetically slidably fitted to the base 92 of the base support groove 105, thereby positioning the base 92 in the left-right direction.

If the operating lever 130 shown in Fig. 1 is pressed downward in a state in which the base 92 is fitted to the base supporting groove 105 of the base stopper 104, the cylinder 106 is operated and the base holder 108 is lowered, as shown in Fig. 15 ( b), the locking portion 108a will be fitted to The base 92 of the word slot 113 is depressed, thereby securing the base 92 to the base stop 104.

Further, as shown in FIG. 1, a safety cover 109 is attached to the operation lever 130, and the safety cover 109 covers the front surface side of the upper blade 91 when the base holder 108 is operated, that is, when the operation lever 130 is in the lowered position. Further, in addition to the operation of the base holder 108, the operation lever 130 also raises and lowers the driven roller 23A and the driven roller 23B of the transport mechanism 20 in accordance with the elevation of the operating lever 130. In addition, another safety cover 131 is attached to the operation lever 130, and the other safety cover 131 covers the opening of the hole 132 formed in the roller support body 27 when the base holder 108 is operated, that is, when the operation lever 130 is in the lowered position. 132a (refer to Figure 2). The hole 132 formed in the roller support body 27 is a hole into which a tool is inserted, and the tool is used to fasten or release the fastening unit 102 of the upper blade 91.

Moreover, as shown in FIG. 2, the cutting mechanism 90 includes a component presser 120, When the continuous fastener chain 1 is cut, the component presser 120 presses the upper surface of the separating member 7 in order to prevent the separating member 7 accommodated in the receiving groove 112 from being detached from the receiving groove 112. The component presser 120 is provided with a member pressing bar 121 that is slidably fitted to the shaft pin 122 fixed to the base 45. One end 121a of the component pressing bar 121 is provided to extend above the receiving groove 112 so that the upper surface of the separating member 7 can be pressed. Further, a tension spring 124 is disposed between the other end 121b of the member pressing rod 121 and the supporting member 123, and the supporting member 123 is driven up and down by the second cylinder 26 together with the roller supporting body 27. Thereby, the component pressing bar 121 is pressed in the counterclockwise direction by the elastic force of the tension spring 124. Further, the support member 123 is provided with a blocking screw 125 that comes into contact with the upper surface of the other end 121b of the component pressing bar 121 to restrict the swing range of the member pressing bar 121.

The component presser 120 operates in the reverse direction of the driven roller 23B in conjunction with the operation of the driven roller 23B by the second cylinder 26, and if the driven roller 23B rises and the conveyance of the continuous fastener chain 1 is stopped, the stopper screw 125 is stopped. As a result, the component pressing bar 121 is rotated counterclockwise by the elastic force of the tension spring 124 to press the upper surface of the separating member 7. Conversely, if the driven roller 23B is lowered, the other end 121b of the component pressing bar 121 is pressed by the blocking screw 125 to rotate in the clockwise direction, thereby releasing the pressing of the separating member 7.

Here, when the upper blade is attached or replaced, the position adjustment of the height or the slope of the upper blade 91 with respect to the base 92 may be performed only in the first time, and only the following simple operation is performed after the second time. The mounting can be performed without adjustment: the upper surface 91a of the upper blade 91 is in contact with the contact surface 95a of the positioning magnet 95, and the screw is used. The plug 102 fixes the magnetically attracted upper blade 91.

Specifically, as shown in FIGS. 14(a) and 14(b), after the positioning magnet 95 and the upper blade 91 are temporarily held by the upper blade holder 94, the blade portion 103 of the upper blade 91 held by the magnetic force is held. The flat portion 111 of the base 92 is touched to fix the positioning magnet 95 and the upper blade 91 to the upper blade holder 94. Thereby, the positioning magnet 95 is positioned at a predetermined position along the flat portion 111 of the base 92 via the upper blade 91.

At the time of replacement and attachment of the upper blade 91 after the second time, the upper blade 91 fixed to the upper blade holder 94 is held by a blade replacement jig (not shown), and the bolt 102 is loosened and removed. Next, the new upper blade 91 is placed on the upper blade replacement jig, and the upper surface 91a of the upper blade 91 is brought into contact with the contact surface 95 of the positioning magnet 95. The upper blade 91 is positioned and held at the correct position by the suction force of the positioning magnet 95, and is thus replaced by the bolt 102 for replacement.

Further, as shown in FIGS. 13(a), 13(b) to 15(a) and 15(b), the replacement of the base 92 is performed by opening the operating lever 130 to operate the cylinder 106, thereby holding the base. The device 108 rises and releases the pair of locking portions 108a Engagement of the word groove 113 (refer to Fig. 15 (a)). Next, the base 92 is pulled out from the base support groove 105 of the base stopper 104 and removed, and the new base 92 is slidably fitted to the base support groove 105. At this time, the base 92 is placed at the correct position by the magnetic attraction of the magnetic screw 114. Next, if the operating lever 130 is closed, the cylinder 106 is operated, and the locking portion 108a is engaged with The base holder 108 of the word slot 113 is lowered so that the base 92 is fixed to the base stop 104.

<cutting process>

Next, a process of cutting the continuous fastener chain 1 at a predetermined position by the cutting device 10 having such a configuration will be described in detail along the flowchart shown in FIG. 16. First, as shown in FIGS. 6(a) and 6(b), a pair of chain guides 41A and chain guides which are adapted to the width of the fastener tape 2 are adjusted corresponding to the continuous fastener chain 1 for cutting. The width of the 41B is selected such that the interval between the pair of first fitting holes 51 included is the surface of the chain width adjusting member 44 corresponding to the pair of chain guides 41A and the first engaging pins 52 of the chain guide 41B. The pair of first engagement pins 52 are fitted to the pair of first fitting holes 51.

Next, as shown in FIG. 8, the position of the chain stopper 61 determined for each of the continuous fastener chains 1 is moved in the front-rear direction together with the movable base 62, and the second engagement with the coupling member 79 is selected. The second fitting hole 84 corresponding to the pin 83 is positioned on the surface of the member 82, and the second fitting hole 84 is fitted to the engaging pin 83. Further, as shown in FIGS. 13(a), 13(b), 4(a) to 4(c), and 5, when the continuous fastener chain 1 having the stopper 6 is cut, The combination of the upper blade 91A and the base 92 is selected and mounted to the upper blade holder 94 and the base block 104, respectively. Further, in the case where the continuous zipper chain 1 having the separating member 7 is cut, the combination of the upper blade 91B and the base 92 is selected and attached to the upper blade holder 94 and the base stopper 104, respectively.

Further, in response to the specification of the continuous fastener chain 1, the operation lever 130 is lowered to operate a switch of an operation panel (not shown), and the activation condition is confirmed in accordance with the specifications of the stopper 6 or the separation member 7 (step S1) and the cutting is started. Device 10. Thereby, as shown in FIG. 2, the first cylinder 24 and the second cylinder 26 operate, and the driven roller 23A and the driven roller 23B When the drive roller 22A and the drive roller 22B are separated from the driven roller 23A and the driven roller 23B, the continuous fastener chain 1 is sandwiched. Then, the drive roller 22A and the drive roller 22B are driven to convey the continuous fastener chain 1 at a high speed (step S2).

Soon after, when the gap portion 5 of the continuous zipper chain 1 conveyed reaches the position of the sensing roller 29, the sensing roller 29 comes in and out of the gap portion 5, whereby the swing lever 30 to which the sensing roller 29 is attached is swung and opposed The gap portion 5 is detected (step S3), and the conveyance of the continuous fastener chain 1 is switched to the low speed conveyance (step S4). At the same time, the piston rod 68 of the air cylinder 67 is extended, and the front end portion 61a of the chain stopper 61 is raised and protrudes upward from the gap portion 5 (step S5, step S6). At this time, the first link 66 is biased in the counterclockwise direction by the elastic force of the tension spring 73, and the first blocking screw 74 is in a position in contact with the first stopper 76.

Further, when the continuous fastener chain 1 is conveyed, the front end portion 61a of the chain stopper 61 is pressed to the fastener element 3 at the downstream side end of the gap portion 5, and the chain stopper 61 moves forward against the elastic force of the tension spring 73 (step S7). ). Further, in step S8, the subsequent steps are selected depending on which of the stopper 6 and the separating member 7 is attached.

<Control of continuous zipper chain with stoppers>

In the case of the continuous zipper chain 1 with the stopper 6, when the chain stopper detecting portion 78 detects that the chain stopper 61 is moving forward (refer to FIG. 11(c)), the piston rod 68 of the cylinder 67 contracts. The chain stopper 61 is lowered and displaced from the gap portion 5 (step S9). Thereby, the chain stopper 61 is returned to the original position by the elastic force of the tension spring 73, for example, about 3 mm (step S10). At the same time, the first The cylinder 24 and the second cylinder 26 raise the driven roller (pressing roller) 23A and the driven roller (pressing roller) 23B to release the tension generated inside the continuous fastener chain 1 during the transportation (step S11, step S12). Thereafter, the first cylinder 24 and the second cylinder 26 lower the driven roller (pressing roller) 23A and the driven roller (pressing roller) 23B (steps S13 and S14), and the conveyance of the continuous fastener chain 1 is stopped.

At this time, the continuous fastener chain 1 stops at the cutting position CL2 of the base 92 on the upstream side of the storage groove 112 at the substantially central position of the gap portion 5. Then, as shown in FIGS. 13(a), 13(b) and 15(a) and 15(b), the cylinder 93 is operated and the upper blade 91 is lowered (step S15), and the upper blade 91 and the base 92 are used. The continuous zipper chain 1 is cut (step S16). At this time, since the tension between the pressure roller 23A and the pressure roller 23B is released, the cut surface of the chain of the product is a right angle with respect to the conveyance direction of the continuous fastener chain 1.

Then, when the blade 91 is raised by the operation of the air cylinder 93 (step S17), after a slight delay time (step S18), the drive roller 22A and the drive roller 22B are rotated to carry the next fastener chain, and the cut-off chain is removed. The fastener chain is discharged (step S19), and the rotation of the drive roller 22A and the drive roller 22B is stopped (step S20).

<Control of continuous zipper chain with open piece>

On the other hand, if it is determined in the step S8 that the opening member 7 is determined, the rotation of the driving roller 22A and the driving roller 22B is stopped, and the first cylinder 24 and the second cylinder 26 raise the driven roller 23A and the driven roller 23B ( Step S21, step S22). At this time, as shown in FIG. 17, the chain stopper 61 advances against the elastic force of the tension spring 73 with the conveyance of the continuous fastener chain 1. Moreover, the opening member 7 is at a lower than the base 92. The position of the pocket 112 on the downstream side.

When the driven roller 23A and the driven roller 23B are raised, the continuous fastener chain 1 in which the transport roller 21A and the transport roller 21B are released is retracted by the elastic force of the tension spring 73, and as shown in FIG. The upstream side end portion is in contact with the upstream side wall 112a of the accommodation groove 112 and positioned (step S23). Further, in conjunction with the rise of the driven roller 23B by the second cylinder 26, the member pressing rod 121 is rotated counterclockwise by the elastic force of the tension spring 124 to press the upper surface of the separating member 7, thereby preventing the separating member 7 Offset from the receiving groove 112.

Then, after the piston rod 68 of the air cylinder 67 is contracted to lower the chain stopper 61 (step S24), the driven roller 23A and the driven roller 23B that have stopped rotating are lowered, and the continuous zipper is pressed before and after the cutting position. The chain 1 (step S25) returns to step S15 and operates in the same manner as described above.

As described above, according to the cutting device 10 of the present embodiment, the cutting mechanism 90 includes a magnet 95 having a contact surface 95a that adsorbs the upper blade 91 by magnetic force, and is attached to the upper blade holder 94; and the bolt 102 Since the upper blade 91 sucked and held by the magnet 95 is attached to the upper blade holder 94, it is not necessary to adjust the position of the upper blade 91 when the upper blade is replaced, and the upper blade 91 can be efficiently and surely installed in a short time. .

The magnet 95 preliminarily fixes the upper blade 91 held by the magnetic force to the upper blade holder 94 in a state of coming into contact with the base 92. Therefore, the upper blade 91 can be attracted to the magnet 95 to position the upper blade 91 in a short time. The upper blade 91 is simply and surely replaced.

The base 92 includes a flat portion 111 that cooperates with the upper blade 91 to cut the connection The zipper chain 1 and the accommodating groove 112 are recessed from the flat portion 111 and disposed on the downstream side in the conveying direction, and accommodate the stopper 6 or the separating member 7, and the continuous zipper chain 1 having the stopper 6 is in the accommodating groove The flat portion 111 on the upstream side is cut, and the continuous fastener chain 1 having the separating member 7 is placed so that the separating member 7 contacts the upstream side wall 112a of the housing groove 112, and is cut at the left and right flat portions 111 of the housing groove 112. Broken, a continuous zipper chain 1 having a stop 6 or a separate member 7 can be cut in place using a base 92. Therefore, even if the specification of the continuous fastener chain 1 is changed, it is not necessary to replace the base 92.

The cutting mechanism 90 further includes a component presser 120 that presses the upper surface of the separating member 7 received in the receiving groove 112, thereby preventing the separating member 7 from being displaced from the receiving groove 112, and the continuous fastener chain 1 can be surely positioned at a predetermined position. Cut off.

Moreover, including an operating lever 130 for operating the base holder 108, the base holder 108 is for fixing the base 92 to the base block 104, and the operating lever 130 is mounted with a safety cover 109, the safety cover 109 The operation of the operating lever 130 covers the front surface side of the upper blade 91 when the base holder 108 operates. Therefore, the position of the operation lever 130 when the base holder 108 is operated cannot be configured to perform the unloading operation of the upper blade 91, and the safety of the worker is ensured.

Further, while the base holder 108 is operating, the operation lever 130 moves the driven roller 23A and the driven roller 23B provided in the conveying mechanism 20 up and down, and another safety cover 131 is attached to the operating lever 130, and the other The safety cover 131 covers the hole for the tool insertion when the base holder 108 is operated as the operation lever 130 operates, and the tool is used to fasten or release the fastening unit 102 of the upper blade 91. Therefore, by the action of the operating lever 130, The base holder 108 is operated simultaneously with the driven roller 23A and the driven roller 23B, so that the workability can be improved, and the position of the operation lever 130 when the base holder 108 is operated cannot insert the tool into the tool insertion hole. It ensures the safety of the operator.

The present invention is not limited to the embodiments described above, and may be appropriately modified without departing from the spirit and scope of the invention.

90‧‧‧cutting mechanism

91A‧‧‧Upper

91a‧‧‧Upper surface

92‧‧‧Base

92a‧‧‧ inside side

93‧‧‧ cylinder

94‧‧‧Upper knife holder

95‧‧‧ magnet

95a‧‧‧Contact surface

96‧‧‧ piston rod

97‧‧‧Cylinder connector

98‧‧‧Upper holder support

98a‧‧‧ Word slot

99‧‧‧ bolt

101‧‧‧U-shaped slot

102‧‧‧Bolts (fastening unit)

103‧‧‧blade

104a, 104b‧‧‧ base block

106‧‧‧ cylinder

107‧‧‧ piston rod

108‧‧‧Base holder

108a‧‧‧Locking

111‧‧‧ Flat section

112‧‧‧ Containment trough

113‧‧‧ Word slot

114‧‧‧Magnetic screws

115‧‧ ‧ sales

Claims (5)

A cutting device (10) for cutting a continuous fastener chain (1) at a predetermined position, in the continuous fastener chain, a chain of teeth arranged along an edge (2a) of a pair of chain belts (2) (4) forming a void portion (5) having no fastener element (3) at a predetermined interval, and providing a stopper (6) or a separating member (7) at at least one end of the gap portion (5), The cutting device includes a conveying mechanism (20) that conveys the continuous fastener chain (1), and a cutting mechanism (90) having a blade (91) that cuts the continuous fastener chain (1) and a base ( 92), and a driving portion (93) for driving the blade; and the cutting mechanism (90) includes: a magnet (95) having a contact surface (95a) that adsorbs the blade (91) by a magnetic force, and is Mounted to the knife holder (94); and a fastening unit (102) for detachably mounting the knife (91) held by the magnet (95) relative to the knife holder (94), and The magnet (95) preliminarily fixes the knife (91) held by magnetic attraction to the blade holder (94) in a state of touching the base (92). The cutting device (10) according to claim 1, wherein the base (92) includes a flat portion (111) that cooperates with the knife (91) to move the continuous zipper chain ( 1) cutting; and a receiving groove (112) recessed from the flat portion (111), disposed downstream of the continuous zipper chain (1) in the conveying direction and in the width direction, and accommodating the stopper a piece (6) or a separate piece (7), and the continuous zipper chain (1) having the stopper (6) is in comparison with the The flat portion (111) of the receiving groove (112) is cut off on the upstream side, and the continuous zipper chain (1) having the separating member (7) causes the separating member (7) to contact the receiving groove The upstream side wall (112a) of (112) is housed, and the flat portion (111) on the right and left sides of the storage groove (112) is cut. The cutting device (10) according to the second aspect of the invention, wherein the cutting mechanism (90) further comprises a component presser (120) for pressing the separation received in the receiving groove (112) The upper surface of the piece (7). The cutting device (10) of claim 1, comprising an operating lever (130) for operating the base holder (108), the base holder for positioning the base (92) Fixed to the base block (104), and a safety cover is mounted on the operating rod (130), the safety cover (109) is in the base holder along with the operation of the operating rod (130) ( 108) Covering the front surface side of the knife (91) during operation. The cutting device (10) according to claim 4, wherein the operating lever (130) is disposed on the conveying mechanism (20) while the base holder (108) is operating The driven roller (23A, 23B) is raised and lowered, and another safety cover (131) is mounted on the operating lever (130), and the other safety cover is in operation with the operation of the operating lever (130) The base holder (108) operates to cover a hole (132) for tool insertion for fastening or releasing the fastening unit (102) of the knife (91).