JPH085562B2 - Conveyor chain unit for bookbinding machines - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saddle-shaped receiver for placing folded paper sheets,
The present invention relates to a transport chain unit for a bookbinding machine, which includes a pusher for transporting folded paper sheets.

2. Description of the Related Art In a bookbinding machine, a special conveying device is used for high-speed conveyance of a signature (hereinafter referred to as a folded sheet) in which a predetermined number of sheets are folded in a set.

The most general type of such a transport device is two endless transport chains that run parallel to each other, a saddle-shaped receiver attached to almost the entire length of the transport chain, and a transport chain at appropriate intervals. It is provided with a pusher which is provided perpendicularly to the traveling direction of the chain, and it is possible to convey the folded paper sheet placed while straddling the saddle-shaped receiver while pushing it with the pusher. A moving section for transferring the folded paper sheet to the subsequent equipment is provided near the end of the conveyance, and a removing plate that moves up and down at a high speed is installed in the transferring section. Therefore, the folded paper sheet conveyed horizontally can be removed from the conveyance equipment and transferred to the succeeding equipment by raising the removal plate at a high speed. In addition, in the transfer section, the pusher is continuously running even while the folded paper sheet is being lifted through the removal plate, so that if the pusher is upright and fixed to the transport chain, Interference with folding paper leaves,
The side edges of the folded paper sheet may be bent or damaged.

In order to deal with this problem, it is effective to incline the pusher rearward in the transfer section and reduce the front shape of the pusher from the upper side to the lower side (Japanese Patent Publication No. 56-12573). This is because such a pusher can pass through the folded paper sheets without hindrance while pushing the space between the folded paper sheets even while the folded paper sheets are rising.

The pusher in this case is mounted on the transport chain so that it can be tilted up and down, and a guide roller is attached diagonally below and rearward along the entire length of the section for horizontally transporting folded sheets (hereinafter referred to as the horizontal transport section). , A guide rail is provided. By holding the guide roller at a predetermined height, the guide rail can keep the pusher running in the upright position. On the other hand, there is no guide rail in the transfer section, and the pusher is tilted backward by tilting the guide roller by its own weight.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, according to such a conventional technique, since the pusher stands upright in an upright position by the guide roller being positioned at a predetermined height through the guide rail, the guide rail is horizontally conveyed. There is a drawback that the level must be maintained with high accuracy with respect to the traveling rail on which the transport chain travels over the entire length of the section, and excessive assembly accuracy is required. In addition, since the pusher tilts rearward due to the weight of the guide roller in the transfer section, if the pusher does not move smoothly due to a change over time, the disadvantage that the pusher tilting operation becomes uncertain cannot be avoided. .

Therefore, in view of the drawbacks of the prior art, an object of the present invention is to provide a rocking lever for driving a pusher, a spring, and a holding mechanism, thereby avoiding providing a troublesome guide rail for a horizontal transport section. Moreover, in the transfer section,
An object of the present invention is to provide a transport chain unit for a bookbinding machine that can surely incline the pusher backward.

Means for Solving the Problems The structure of the present invention for achieving such an object is a transport chain including a saddle-shaped receiver for placing a folded paper sheet,
A pusher that has a swing lever that is swingably mounted on the transport chain and a pusher plate that projects to the side of the saddle-shaped receiver, that is swingably mounted on the transport chain and that is connected to the swing lever via a gear. And a spring for urging the pusher in the upright direction and a holding mechanism for holding the pusher in the upright position against the spring.The swing lever contacts the linear cam provided in the moving section to The main point is to tilt the pusher backward by swinging backward against it.

Operation According to the configuration of the invention, the pusher is biased in the upright direction via the spring in the horizontal conveyance section and is held in the upright position by the holding mechanism, and thus the pusher can run while maintaining the upright state. it can. Further, the pusher can be positively tilted rearward via the gear by the swing lever coming into contact with the linear cam and swinging rearward in the transfer section.

Example Hereinafter, an example will be described with reference to the drawings.

A transport chain unit C for a bookbinding machine includes an endless transport chain 10, saddle-shaped receivers 20, 20, ... And pushers 30, 30, ... As main members (FIG. 1). However, the transport chain 10
, Two saddles run parallel to each other, and the saddle-shaped receivers 20, 20, ..., Pushers 30, 30, ... Are arranged symmetrically on the transfer chains 10, 10 (FIGS. 3 and 4).

The two transfer chains 10, 10 are roller chains of the same standard, and both circulate in a vertical plane and run parallel to each other. Each transport chain 10 has pins 11, 11
... is provided with extension pins 11a, 11a, which are projected on one side surface (Fig. 2), and a male screw 11b is provided near the tip of each extension pin 11a.
Are formed.

The saddle-shaped receivers 20, 20, ... Are attached to almost the entire length of the transport chain 10 for each link plate of the transport chain 10 (FIG. 1). The pair of saddle-shaped receivers 20, 20 on the transport chains 10, 10 facing each other form a substantially saddle-shaped receiving surface on which the folded paper sheet S can be placed (FIG. 4), and a gap is formed at the center of the top. L can be formed. Each saddle-shaped bracket 20 has an extension pin 11
Insert a, 11a into the lower part and insert male screws 11b, 11b, nuts 12, 12
It is fixed to the outer link plate 10a of the transfer chain 10 via.

Each pusher 30 is formed by forming a frame 32 on the back surface side of the pusher plate 31 (FIG. 2) and fixing a bearing cylinder 34 on the inner surface side of the frame 32.

The pusher plate 31 is a plate-like body, and when the pusher 30 is assembled to the transport chain 10, the upper part thereof is a saddle-shaped receiver 20,
It is formed in a substantially triangular front shape so that it greatly protrudes to the side of, and its lower portion is located immediately outside the saddle-shaped receivers 20, 20. The outer peripheral edge of the pusher plate 31 is formed by a smooth curve (Fig. 3).

The frame 32 is integrally formed with the pusher plate 31 on the back side of the pusher plate 31 (FIG. 2). The upper part of the frame 32 is formed in a flaw shape projecting to the rear of the pusher plate 31, and the lower part is formed in the pusher plate 31.
Forming a frame main body portion 32c which is largely curved and protrudes rearward. In addition, on the inner surface of the frame main body portion 32c,
Reinforcing ribs 32a and 32b are formed. Further, an inclined surface 32d that matches the lower end of the pusher plate 31 is formed at the lower end of the frame body 32c (FIG. 3).
In the vicinity of the upper end of the inclined surface 32d, a horizontal fin 33 is formed which is low at the front part where the pusher plate 31 is joined and which becomes higher as the distance from the pusher plate 31 increases toward the rear.

The bearing cylinder 34 is fixed to the inner surface side of the frame main body 32c (Fig. 2). The bearing cylinder 34 is a pusher plate.
A gear 34a is engraved on approximately half of the 31 side, and a through hole 34b is formed in the center. The pusher 30 is
The extension pin 11a of the transfer chain 10 is swingably mounted via a fulcrum pin 60 that is inserted through the through hole 34b. That is,
The fulcrum pin 60 has a through hole 60a in the center, a female screw 60b is formed in a part of the through hole 60a, and a collar 60c is formed at one end of the outer circumference.
Have. The female screw 60b fits the male screw 11b of the extension pin 11a, and the fulcrum pin 60 can be rotatably inserted into the through hole 34b of the bearing cylinder 34.

The pusher 30 is attached together with another symmetrical pusher 30 to the transport chains 10, 10 arranged in parallel so as to face each other (FIG. 3), and the gap L is formed at the center of the top. Is forming.

The transport chain 10 has an extension pin 11 for pivotally mounting the pusher 30.
A swing lever 40 is swingably mounted via an extension pin 11a adjacent to the front of a (FIG. 2).

The swing lever 40 has a roller 42 rotatably attached to one end and a boss 41 having a gear 41a engraved in a range of about 1/4 of the outer circumference integrally formed on the other end. A concentric annular groove 41b is formed inside the boss 41, and a spring is formed in the annular groove 41b.
50 built in. The spring 50 is a torsion coil spring, and one end 50b has a plurality of through holes 41 formed in the inner side of the annular groove 41b.
One of c, 41c ... Is hooked, and the other end 50a is hooked on the outer ring plate 10a of the transport chain 10. That is, the through holes 41c, 41c, ... Are hooking portions that hook one end 50b of the spring 50.

The swing lever 40 is pivotally attached to the extension pin 11a of the transport chain 10 via a fulcrum pin 70 that is inserted into the boss 41. That is, the fulcrum pin 70 is similar to the fulcrum pin 60 in the through hole 70.
The swing lever 40 can be attached to the transport chain 10 via the extension pin 11a, which has a, a female screw 70b, and a collar 70c.

The swing lever 40 is attached together with another symmetrical swing lever 40 to the transport chains 10, 10 arranged in parallel so as to correspond to the pushers 30 (third embodiment).
Figure). However, in the pusher 30 at this time, the frame 32 covers the swing lever 40 and the fulcrum pin 70 from the outside,
It can swing back and forth without interfering with 40.
The rocking lever 40 and the pusher 30 are assembled by engaging the gear 41a formed on the boss 41 and the gear 34a formed on the bearing tubular body 34 with each other, and the pusher 30 at this time is provided with the gears 41a and 34a. Is connected to the rocking lever 40, and can be rocked back and forth via the rocking lever 40.

A holding mechanism that holds the pusher 30 in the upright position is provided between the pusher 30 and the swing lever 40. The holding mechanism is composed of an outer surface of the boss 41 of the swing lever 40 and an arc portion 35 formed on a part of the frame 32 of the pusher 30 (FIGS. 2 and 5), and the pusher 30 is attached to the transport chain 10. On the other hand, when standing upright, the circular arc portion 35 is supposed to be in sliding contact with the outer surface of the boss 41 (solid line in FIG. 5).
It is assumed that the spring 50 is in the upright state by the restoring force of the spring 50. That is, the spring 50 urges the swing lever 40 from the rear swing position (two-dot chain line in FIG. 5) in the restoring direction,
The pusher 30 can be biased in the upright direction from the rearward inclined position (the same) via the gears 41a and 34a.

The apparatus for transporting folded sheets S using the transport chain unit C is provided with traveling rails 80, 80 on which the two transport chains 10, 10 travel for almost the entire length (first
Fig.), Drive sprockets 82, 82 fixed to the drive shaft 81,
A driven shaft and a driven sprocket (not shown) are provided.
On the other hand, near the end of conveyance, that is, the drive sprocket 82,
In the vicinity of 82, saddle-shaped receivers 20, 20 ... and pushers 30, 30 ... are provided as transfer devices for transferring the folded paper sheets S to the subsequent equipment.
Removal plates 83, 83 that move up and down at high speed through the gaps L at the tops of the
Is provided. When the transport chains 10, 10 travel horizontally along the traveling rails 80, 80, the transport chains 10, 10
In order not to fall down, the tilt-prevention rails 84, 84 are placed close to the guide rollers 42, 42 ... of the upright swing levers 40, 40.
Is provided. In addition, in the transfer section in which the removal plates 83, 83 are arranged, the linear cams 85,
85 is attached. However, in FIG. 1, only one of the members arranged in pairs is shown.

When the transport chains 10, 10 are driven via the drive sprockets 82, 82, the guide roller 42 of the swing lever 40 is close to the fall prevention rail 84 in the horizontal transport section (solid line in FIG. 5). , It is not in contact with the fall prevention rail 84. Therefore, the swing lever 40 at this time is in an upright state by the restoring force of the spring 50, and the pusher 30 is also in an upright position perpendicular to the traveling direction F of the transport chain 10 via the spring 50 and the gears 41a and 34a. It is in. At this time, the circular arc portion 35 of the pusher 30 is in sliding contact with the outer surface of the boss 41 of the swing lever 40, and the holding mechanism composed of the circular arc portion 35 and the outer surface of the boss 41 is a spring.
The pusher 30 can be held in an upright position against the 50. In this way, the pushers 30, 30 travel while maintaining the upright state in the horizontal conveyance section, and the saddle type receivers 20, 20
The folded paper leaf S can be reliably transported by the pusher plates 31, 31 protruding laterally.

On the other hand, the guide roller 42 of the swing lever 40 contacts the linear cam 85 in the transfer section. Therefore, the swing lever 40
Is against the spring 50, and in the counterclockwise direction in FIG.
The pusher 30 swings backward by 1 (two-dot chain line in the figure), and the pusher 30 at this time is rotated by the angle θ2 in the clockwise direction via the gears 41a and 34a.
Only rocks and tilts backward. Here, the straight cam 85 is
Corresponding to the two transfer chains 10, 10, the starting end 85 of each
Assuming that a is arranged in the same position, the pushers 30, 30 on the transport chains 10, 10 can be tilted rearward at the same time. The pusher plates 31, 31 of the pushers 30, 30 are saddle-shaped receivers 20, from the top to the bottom.
Since the horizontal fins 33, 33 are higher from the front to the rear, the folding sheets S are formed by the removing plates 83, 83. Pusher 30, even while rising
30, the folded paper leaf S can be pushed and spread smoothly, and there is no risk of bending or damaging the side edge portion of the folded paper leaf S.

The circular arc portion 35 formed on the pusher 30 as a part of the holding mechanism is in sliding contact with the outer surface of the boss 41 of the swing lever 40 when the pusher 30 is upright, but the holding mechanism is replaced by the pusher 30. The projecting portion provided at may contact the link plate of the transport chain 10 or the swing lever 40.

Further, a plurality of through holes 41c, 41c ... Of the swing lever 40 are provided to adjust the restoring force of the spring 50, but this is sufficient if one end 50b of the spring 50 can be hooked,
It may be a simple concave hole or a groove formed in the boss 41.

Further, the gears 41a and 34a may have different pitch circle diameters. The ratio between the swing angle θ1 of the swing lever 40 and the swing angle θ2 of the pusher 30 is the inverse ratio of the diameters of the pitch circles of the gears 41a and 34a. By making it larger than that, even if the swing angle θ1 of the swing lever 40 is small, the swing angle θ2 of the pusher 30 can be made sufficiently large.

As described above, according to the present invention, the swing lever mounted on the transport chain, the pusher connected to the swing lever via the gear, the spring biasing the pusher in the upright direction, and the pusher. By providing a holding mechanism for holding the pusher in the upright position, the pusher can travel while maintaining the upright state via the holding mechanism in the horizontal conveyance section, and the swing lever moves the linear cam in the transfer section. By abutting against and swinging backward, it is possible to positively incline to the rear via the gear, so not only is it unnecessary to provide a troublesome guide rail in the horizontal transport section, but also in the transfer section, There is an excellent effect that the pusher can be surely tilted backward.

[Brief description of drawings]

1 to 5 show an embodiment, FIG. 1 is an overall assembly explanatory diagram, FIG. 2 is an exploded perspective explanatory diagram of an essential part, and FIG.
FIG. 4 is a symmetric partial sectional view taken along the line XX and YY in the figure, FIG. 4 is a sectional view taken along the line ZZ in FIG. 1, and FIG. C: Transport chain unit S: Folded paper sheet 10 ... Transport chain 10a ... Outer link plate 20 ... Saddle-shaped receiver 30 ... Pusher 31 ... Pusher plate 34a ... Gear 35 ... Arc part 40 ... … Swing lever 41 …… Boss 41a …… Gear 50 …… Spring 85 …… Linear cam

Claims (6)

[Claims] 1. A transport chain including a saddle-shaped receiver for placing folding paper sheets, a swing lever mounted on the transport chain so as to be swingable, and a sideward projection of the saddle-shaped receiver. A pusher that includes a pusher plate and is swingably mounted on the transport chain and that is connected to the swing lever through a gear, a spring that biases the pusher in an upright direction, and the pusher that resists the spring. A holding mechanism for holding the pusher in an upright position, the swing lever contacts a linear cam provided in a moving section, and swings backward against the spring to tilt the pusher backward. A transport chain unit for a bookbinding machine, which is characterized by: 2. The transport chain unit for a bookbinding machine according to claim 1, wherein the swing lever and the pusher are connected via gears having different pitch circle diameters. 3. The bookbinding according to claim 1, wherein the spring urges the swing lever from a swing position in a restoring direction to urge the pusher. Transport chain unit for machines. 4. The spring is a torsion coil spring, one end of which is hooked on a boss of the swing lever, and the other end of which is hooked on an outer link plate of the transport chain. A transport chain unit for a bookbinding machine according to claim 3. 5. The transport chain unit for a bookbinding machine according to claim 4, wherein the boss has a plurality of latching portions for latching one end of the torsion coil spring. 6. The holding mechanism comprises a boss of the rocking lever and an arc portion formed on the pusher, and the arc portion slidably contacts an outer surface of the boss when the pusher stands upright. A transport chain unit for a bookbinding machine as claimed in any one of claims 1 to 5.