JPH01500097A - Motor operated fastener drive machine with movable anvil - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Motor-operated fastener machine with movable anvil Various proposals have been made for drive devices for stable driving blades, and none have been put into practical use. There are 0 rotation motors with electric solenoid type and compressed air piston cylinder type. A rotary motion has also been proposed, which converts rotational motion into reciprocating motion and drives the fastener into the blade. There are various means for causing exercise. (U.S. Pat. No. 945,769, 2, No. 252,805, No. 2,650,360, No. 2,770,805, No. 4,199 , No. 095) A portable device including a rotary power drive device has also been proposed.

Forms and drives staples from unformed staple blanks supplied by the belt. Powered stable machines have also been used for several years. (U.S. Pat. No. 4,542,84 (See No. 4). This stapling machine can be manual or solenoid driven, but it is noisy. Accordingly, solenoid-driven devices require high peak current.

``1 item'' L seen The invention generally includes a frame, a fastener drive blade and a drive unit. and a fastener drive mechanism.

The drive control unit includes spaced drive control unit frame pieces mounted on the frame. A blade drive control unit that moves the blade drive unit up and down, and a a rotating driven wheel and an electric motor drive that transmits the rotational motion to the driven wheel. a low current fastener drive device, including a conduction device;

The blade drive control unit is driven by a drive wheel that penetrates the frame piece. at least one eccentrically mounted frame member extending between the frame pieces and disposed between the frame pieces; It includes a shaft with a cylindrical disc. The cylindrical disc is pivotally connected to the frame. The driven arm engages with the tied driven arm, and the driven arm follows the cylindrical disc to drive the blade. The control unit is moved back and forth along an arcuate path.

The arcuate movement of the blade drive control unit causes the blade drive unit to move in an arcuate manner. (vertical direction) and drive (drive) the fasteners one after another. Drive control unit The knit may be utilized to move the anvil between open and closed positions.

One feature of the fastener machine is that an electric motor drive transmission is connected to each drive stroke. It may then be deenergized by a suitable switch device.

Another feature is that the blade drive unit consists of a drive blade and a blade drive control unit. and a compression spring disposed between the base plate and the base plate to accommodate workpieces of different thicknesses.

Another feature of the device is that the follower arm member is arranged inside the drive control unit. Miniaturize 1. Moment due to the crank arm being placed at both ends of the crankshaft Reduce the force of the arm.

Simple brightness of the surface FIG. 1 is a right side elevational view of a motor-driven stapling machine shown as an embodiment of the present invention; Drive control unit including rotary drive unit in upper position (partially shown as cross section) has.

FIG. 2 is a top elevational view, partially shown in section.

FIG. 3 is a front elevational view, partially shown in cross section.

Figure 4 is a right side elevational view, partially in section, with the drive control unit in the lower set position. FIG.

FIG. 5 is an exploded perspective view of the follower arm and the dumbbell portion of the rotary drive unit.

FIG. 6 is a perspective view showing another embodiment of the jaw unit and frame piece of the anvil.

7 is a side elevational view of the embodiment of FIG. 6 showing the anvil jaws open; FIG.

FIG. 8 shows yet another embodiment showing the anvil jaws as closed.

1-5, stapling machine 10 is shown with a base 1 including base plate 12. 1 and anvil 13.

and upright spaced frame pieces 14,16. The staple mechanism 17 It is carried pivotably around the pin axis 19 by the frame arms 21-22. vinegar The staple mechanism 17 includes a head portion 23, a staple sheath 24, and a head portion 2. and a head spring 25 that presses the sheath 24 against the head cartridge. The cartridge is held in place by the cartridge 27, cartridge restraining spring 28, and head spring 25. Staple blank strip 29 supplied from the screwdriver 27 and the upper drive unit 31 and a head plate 34 are shown.

The upper drive unit 31 includes a staple drive blade 32 and a drive blade housing. ring 33, head plate 34, housing cavity 35, and housing accommodated within cavity 35. a compensating spring 36 and a plunger button head 38. blade housing 33 is movable up and down along an upright post 41, and the post 41 is shown in FIG. , is attached to the head portion 23 as shown in FIG. In the housing 33, There is an extension 33a having a hole 33b through which the post 41 passes (see FIG. 2).

Plunger button head 38 is secured by pin 43 in slot 45 of button head 38. is restrained within the cavity 35 and biased upwardly by a compensating spring 36.

Plunger head 38 is connected to blade 32 and is connected to a plunger head drive control unit. The unit 5 is moved along an arcuate path controlled by the unit 50. 0 is pivotally supported around the pin axis 19 on the base 11. Drive control unit The kit 50 has spaced parallel frame pieces 52,53 (top lateral) on the base 11. (reinforced as shown in FIG. 2 by a direction piece 55) and that Eccentric followers connected to frame pieces 14, 16 using pivot pins 58, respectively It is supported via arms 56,57. The eccentric follower arms 56 and 57 are the stem portion 56 a, 57a and upper eccentric follower eye portions 56b, 57b, the eye portion 5 6b and 57b are plastic parts eccentrically attached to the shaft 62 as shown in FIG. It surrounds, follows and moves relative to the disks 59,61. The shaft 62 is made of plasti It is fixed to the lock gear 63 and is rotationally driven. Disc 59.61 and plastic shaft The tube 60 and shaft 62 form a dumbbell unit 65, which unit 65 is shown in FIG. As shown, it is rotated by driven wheels 65.

The follower arm 56.57 and the dumbbell unit 65 are located inside the frame piece 52.53. Because of the position, miniaturization is achieved and the length of the shaft 62 is shortened.Is the shaft 62 short? The torque decreases, and the tendency of #62 to move vertically in Fig. 1 becomes smaller. . This torque is applied to the driven wheels 65 and the bearings 62a, 62b in the frame pieces 52.53. This includes the force that acts during staple driving between the

The shaft 62 is rotatably supported within the frame pieces 52, 53 and extends beyond the frame pieces 52. extends to carry a driven plastic wheel 63 (FIG. 2), which driven wheel 63 is a motor. It is driven by a spur gear 66 via a motor shaft 67 of a motor 68 . The shaft 62 is Bearings 62a, 6 in frame pieces 52, 53 pivotable about axis 19 2b, the shaft 62 moves along the arc A (FIG. 1) around the pin shaft 19. exercise. The motor 68 is a 13,000 rp@DC24V motor with a reduction gear. The force of the 50 inch bond is generated through the machine to perform the stapling operation.

Motor 68 may be powered by batteries or standard supply electricity and a transformer.

The reduction gear has a reduction ratio of 1/10, the speed is 1/10, and the torque is 10 times higher. . The driven gear 63 transfers its torque to the diameter portion of the plastic disc 5]61. Transfer to shaft 62 with moment arms of equal distance. The rotation of the motor is controlled by the motor casing. The rotation speed of the shaft 62 is reduced to 150 by the spur gear 63 and the driven wheel 63. rpm (2.5 revolutions per second).

The drive control unit 50 preferably includes an upper slide integrally formed in the transverse piece 55. A slot channel including a moving plate 72 and downwardly spaced sliding plates 73a, 73b. including the flannel 71. The stapling mechanism and drive control unit 50 are arranged around an axis 19. The robot moves, but during these cycle movements (1) plunger head 38 and upper The relative sliding movement between the horizontal plate 72 and (2) the pin 43 and the downward distance. Due to the relative sliding movement between the placed transverse plates 73a and 73b, different arcuate meridians are formed. take the road.

In FIG. 4, the stapling machine 10 is in the lower position and the stapling operation is completed. Indicates the state of slot channel 71 and its lateral sides to reach the lower position. The facing plate 72 is pushed downward on the plunger head 38 and slides on the surface of the head 38. so that the slot channel 71 is well below the horizontal (up to 20 degrees or more) ) (0 degrees in Figure 4). The slot channel 71 has the machine in the upper position (first (Fig.), the plunger head 38 is approximately horizontal, and when moving downward, the plunger head 38 is vertical. It is important that an angle is formed between the direct axis and the slot 71. at this angle Friction is thus reduced.

One reason for the reduction in friction is that the head 38 runs a long distance along the slot channel 71. This is due to the separation movement and the channel 71 becoming substantially below horizontal. Drive wheel shaft 62 moves to a downward position, channel 71 connects head 38 and staple drive blade 3 2 (including intermediate links) downwardly towards the bottom A of its arcuate path.

As shown in FIG. 4, the work piece is approximately the thickness of 10 sheets of paper, and the spring 36 is shown in FIG. As shown, the upper drive unit 3 reaches the lowermost position and then moves upwards. Exercise. Spring 36 can generate approximately 40 pounds of force (18 kg) when compressed. It is Noh.

FIG. 5 shows a dumbbell unit 65, which has circular stepped discs 59.61. Each stepped device includes a plastic shaft tube 60 integrally mounted eccentrically at each end. The disk 59.61 has a bearing body portion 75 and a flange portion 76. The shaft 62 The bearing opening 6 in the frame plate 52.53 is secured to the driven shaft 63 and the shaft tube 60. 2a, 62b to rotate freely. Therefore, when the shaft 62 rotates, the dumbbell unit 65 rotates together with the shaft 62 to move the drive control unit 50 along the arcuate path A to the first It is moved back and forth as shown in Fig. 4. The developed view of FIG. 5 shows the stem portion 56a. and a cylindrical eye portion 56b that accommodates the main body portion of the disc water body 75. A moving arm 56 is shown.

Another embodiment is shown in FIGS. 6-8, in which the anvil includes an anvil base plate 8. 6, a pair of base plate pivot pieces 87a, 87b, and plate cam upright portions 88a, 8 8b and an anvil 13'. It is said that The anvil units 85 are frame pieces 14' and 16', respectively. It pivots around pivot axes 91a, 91b mounted above. This pin The robot movement is controlled by a stand fixed to the inner surface of the control unit frame pieces 52', 53'. The cams 92a, 92b are controlled by the cam uprights 8 It moves reciprocally within slots 93a and 93b in 8a and 88b. Slot holes 93a, 93 The shape of b is such that the frame pieces 52' and 53' pivot back and forth around the axis 19'. It is designed to position the anvil 13' in a proper position when moving. groove Holes 93a, 93b have open ends to facilitate assembly. anvil jaw uni The opening of the cut 85 allows the work piece W' to be easily inserted between the anvil 13' and the head part 23'. Make it possible to enter. The closing of the jaw unit 85 is achieved by the cyclic movement of the machine 10'. When performing the operation, position the anvil 13' at the appropriate position, press down and staple. Ensure work.

7 and 8, this second embodiment corresponds to the first embodiment of FIGS. 1 to 5. Similar to the embodiment, when the shaft 62 performs a cyclic movement, the frame piece 52' (53') moves the cam 92a (92b) through the slot 93a (93b) and Pivot the building jaw unit 85 around 91a (9lb). No. In Figure 7, the jaw unit 85 is open to receive the work piece W'. , is closed in FIG. 8 to hold down the workpiece. Slot hole 93a (93b ) is a groove portion 93c (93d) in a direction that crosses an arc around the axis 19' at an angle. Therefore, the frame piece 52' (53') is further lowered during the stapling operation. When moving in the direction, the cam 92a (92b) moves downward in the groove portion 93c (93d). movement in the opposite direction to lock the anvil plate 86 in place.

The downward movement of frame piece 52' (53') causes further movement of anvil 13'. The stapling operation is accomplished without any movement.

When the stapling machine is operated, the transverse plates 73a and 73b raise the pins 43 and staple the staples. Raise the handle mechanism 17 to the upper position (Fig. 1) and place the workpieces, for example two sheets of paper, on the anvil. 13, and a motor 68 is energized by a switch (not shown). Ste Since the pull mechanism 17 is raised to the upper position, no return spring is required. When I get back Since there is no spring, the motor 68 does not require force to overcome the return spring when driving. Since there is only a small frictional force when the motor is energized and started, the current is relatively small. and the necessary power to form and drive the staples in the next part of the cycle. The maximum force also acts over a sufficiently long period of time, so the peak power demand is small. Ru. Sufficient power can be obtained by connecting three rechargeable 9-volt dry batteries in series. Mo The motor 68 rotates the motor shaft and the spur gear 66 to rotate the driven gear 63. driven Bearings of pivot frame pieces 52, 53 spaced apart by rotation of gear 63 A shaft 62 supported by 62a and 62b rotates. When the shaft 62 rotates, the dumbbell knit □65 (as shown in Figure 5, the circular plastic disc 59.61 is ) also rotates. The follower arm cylindrical eyes 56b, 57b are attached to the shaft 62. It adapts to the movement and reciprocates in an arc along the arc A to carry the frame pieces 52 and 53. If necessary, force is transmitted through the frame pieces 52, 53). Therefore frame piece 52. 53 moves along an arcuate cycle path and connects the drive control unit 50 (slot hole 72). ) move similarly as a unitary structure. Slot 72 has a friction transverse plate which applies a sliding force to the plunger head 38 and the drive blade 32 attached to it. These are moved downwardly to form staples and drive them into the workpiece. another In this embodiment, the anvil 13' opens and closes during the operating cycle.

Between the plunger head 38 and the upper surface of the two paper stacks on the anvil 13 Since there is no play in the lowest position of the cycle, spring 36 is not compressed.

When two or more sheets of paper (for example, 10 sheets) are stapled, the 8 additional sheets The spring 36 is compressed by a distance corresponding to the thickness of the machine to prevent jamming and distortion of the machine. groove The depth of 45 is such that the blade 32 absorbs additional frictional force due to the thickness of the work piece W. The pin 43 is allowed to move upward when subjected to

The pivoting stapling mechanism 17 reaches an upper position above the anvil 13 Then, a switch (not shown) is opened and the motor 68 is deenergized. The machine 10 Be prepared for the next task.

The power train (motor, transmission device, eccentric dumbbell device) is simple and compact. As a result, peak power is reduced compared to conventional motor-driven stable devices. Main departure The light shows two torque transmission shafts, namely a motor shaft 67 with a spur gear 66 and a driven shaft. It only has a shaft 62. Furthermore, bearings 62a, 6 of frame pieces 52.53 2b (force acts on this and the drive control unit 50 forms the staple and drives the staple) (moving) are placed as close together as the width of the staple mechanism allows, so there is no need for excessive Reduces power loss due to high torque.

The fastener mechanism shown in U.S. Pat. No. 4,524,844 attaches to fixed staples. The stable head 3o moves downward as the forming part 70 moves downward. It moves towards the work piece on the anvil 23. The stapling mechanism of the present invention basically Although similar, the staple head 23 of the present invention pivots around pivot 19. movement, causing the formation 70 to become disengaged from the stable head, which is unnecessary and undesirable. No movement can be prevented.

A desirable variation is to modify the element 48 of the mechanism so that the pushing element 84 rubs against the surface 79. It may be arranged so that they do not engage with each other.

FIG.6 FIG.8 international search report

Claims (10)

[Claims] 1. a base; an anvil on the base; In motor-driven fastener machines, including is movably attached to the anvil and causes the fastener drive mechanism to drive the fastener toward the anvil. a drive control means for moving the rotary drive means including eccentric means attached to the drive control means and carrying the shaft means; said base about a second pivot means spaced from the first pivot means; , an eyelet mounted between the rotary drive means and the eccentric means, the eyelet surrounding and engaging the eccentric means; a follower arm means having a top means; A drive control means connected to a rotary drive means and carrying said shaft means to cause reciprocating motion. a transmission means for producing a cyclic motion including a path; on the drive control means and slidably engages the fastener drive mechanism to, at times, engage the fastener drive mechanism; The fastener drive mechanism is driven downwardly by the drive control means at other times. fastener mechanism engaging means for moving the mechanism upwardly. 2. The rotary drive means includes a double drive shaft, and the dumbbell means is a shaft arm fixed to the driven shaft. a step and two spaced cylindrical elements eccentrically fixed to the shaft means; the follower arm dumbbell engagement means is a circular recessed opening receiving one of the cylindrical elements; Rotation of the driven wheel causes the cylindrical element to move eccentrically about the shaft means. A fastener machine according to claim 1. 3. The fastener drive mechanism includes a head workpiece compensating means, and the compensating means includes a workpiece compensation means. and an engagement means on the drive control means. Fastener machines described in Section. 4. A claim in which the transmission means includes a spur gear and shaft means that engage the motor drive shaft and the driven wheel. A fastener machine according to item 1. 5. an anvil is attached to anvil plate means, the ramp means pivoting on the base; mounted on the anvil plate means for pivoting from an open position to a closed position on the anvil plate means by cam means; the cam means is on the anvil plate means and the cam means is on the drive control means. A fastener machine as claimed in claim 1, cooperating with fastener means. 6. A base, an anvil on the base, and a stem pivotally attached to the base. A motor-driven stable comprising a cable-forming drive mechanism and a first Mounted around the pivot means of the stable, the stable forming drive mechanism drive control unit means for forming and driving toward the anvil; a shaft attached to the drive control unit means; and a shaft attached to the drive control unit means. rotary drive means including dumbbell means carrying means; said base about a second pivot means spaced from the first pivot means; a follower arm means installed between the rotational drive means and including the dumbbell engagement means; The drive control unit means is coupled to a rotating drive means for carrying and reciprocating the shaft means. A transmission means that pivotably generates a cyclic motion including a circular motion path, and a drive. on the control unit means and in sliding engagement with the stable mechanism; Drives the stable mechanism downward and at other times uses the drive control means to drive the staples and slot groove means for moving the mechanism upwardly. 7. The rotational drive means includes a driven wheel, and the dumbbell unit is connected to the driven wheel. a shaft means and two spaced cylindrical elements eccentrically fixed to the shaft means; and the follower arm dumbbell carrying means is a circular opening receiving one of said cylindrical elements. The rotation of the driven wheel causes the cylindrical element to move eccentrically around the axis. A stable machine according to claim 6. 8. A stable drive mechanism connects the slot means on the drive control unit and the work piece. Claim 6 comprising head work piece compensation means comprising spring means compressed between the heads. Stable machinery as described in . 9. The motor drive shaft according to claim 6, further comprising battery means for powering the motor drive shaft. table machinery. 10. The slot channel means is substantially horizontal in the upper position and is substantially horizontal in the lower position. 7. The stable machine according to claim 6, wherein the stable machine is below horizontal.