JPS6037276Y2 - log cutting machine - Google Patents

Description

[Detailed description of the invention] This invention is based on a cylindrical object to be cut such as a long roll paper (
The present invention relates to a log cutting machine for cutting long logs (hereinafter referred to as long logs) into products of predetermined dimensions.

Conventionally, this type of log cutting machine has the structure shown in FIGS. A log feeding device 3 having a log presser 34 fixed to an endless chino 31 is disposed below the cutter device 2 having a cutter 21, and when the log feeding device 3 is driven, the logs are The long log 2 is pressed by the presser 34.
0 is intermittently transferred to the lower side in the feeding direction by a predetermined length L (the same length as the product dimension 1), and the long log 20 is sequentially cut by a predetermined size 1 by the disc cutter 21. There is.

Moreover, in this conventional log cutting machine, the log presser 34
A log holding device 4 is provided which operates so that when the long log 20 moves forward by a predetermined distance, the long log 20 is also transferred by the same distance.

This log holding device 4 has front and rear roll catchers (front and rear roll catchers) near the log cutting position (passing position of the disc knife 21).
36, 37), and the long logs 20
By pressing the top surface with a fairly high pressure (high pressure that does not crush the log), the long log 20 will be pushed to a predetermined size (product size 1) or more due to inertia when the log presser 34 moves forward due to the frictional force. It is designed to work in a way that prevents it from moving forward.

Note that if this log pressing device 4 is not provided, the moving length of the long log 20 will be uneven due to inertia with respect to the length L of one advance of the log pressing element 34, and the product size 1 to be cut will be
will no longer be aligned.

However, in the log holding device 4 of the conventional log cutting machine shown in FIG. 1 and FIG. 2
When the long log 20 is moved forward while being pressed by the log presser 34, the top surface of the long log 20 is pressed against the plate spring. The bottom surface of the log 60 may cause wrinkles on the top surface of the long log 20.

That is, in the log pressing device 4 using this plate spring 60,
The contact area of the leaf spring 60 with the surface of the log 20 is small, and therefore the surface of the log 20 is partially pressed with high pressure, so when the log 20 moves, a large frictional force is generated between the two. Wrinkles tend to form on the log surface.

Note that when the log 20 is moved forward while being pressed by the log holding device 4, a frictional force is also generated between the lower surface of the log 20 and the upper surface of the guide 35 for guiding the log, causing rubbing. Since the contact area between the upper surfaces of the guides 35 is large, wrinkles do not occur on the lower surface side of the log 20.

In addition, some log holding devices in conventional log cutting machines include
There is a timing belt type log holding device, but in this timing belt type log holding device, the belt that presses the log is synchronous with the forward movement of the log presser and moves by the same length as the forward movement length of the log presser. It is configured as follows,
This timing belt type log holding device has a problem in that its drive mechanism is complicated, and furthermore, vertical adjustment and timing adjustment depending on the size of the log diameter is troublesome.

This invention was developed in view of the problems of conventional log cutting machines as mentioned above.
The object of the present invention is to provide a log cutting machine that has a relatively simple structure and is equipped with a log holding device that is configured to prevent wrinkles from forming on the log surface. , a log feeding device that acts to intermittently transport cylindrical long logs in predetermined size increments, a cutter device to sequentially cut the long logs transferred by the log feeding device in predetermined size increments, and the logs. A log cutting machine equipped with a log holding device for pressing the log transferred by the feeding device so that a long log is pushed out by a fixed size when the log feeding device is driven, the log holding device being , a log pressing member having a concave arcuate lower surface having substantially the same shape as the outer circumferential surface of the log and having an appropriate length in the log feeding direction, with the concave arcuate lower surface maintained in a substantially horizontal state; The log pressing member is supported by a support device so as to be movable in both diagonal directions, upward on the lower side in the feeding direction and lower on the upper side in the feeding direction, and further configured to urge the log pressing member downward by a spring or the like. It is characterized by this.

Hereinafter, the log cutting machine of the present invention will be explained based on the illustrated embodiment. The log cutting machine of the present invention shown in FIGS. 3 to 7 is designed for cutting roll paper. There are two rows of log feeding devices 3, 3 that can intermittently transfer long logs 20 of a predetermined size to the downstream side in the feeding direction, and a long log 20 disposed above the log feeding devices 3, 3. A cutter device 2 having a disc blade 21 for cutting the log 20 and a cutter device 2 disposed near the log cutting position where the long log 20 is cut, cut the long log 20 when the log feeding device 3.3 is driven. It has a log holding device 4 to ensure that the logs are transferred in constant size increments.

The cutter device 2 supports a base shaft 12 by a bearing 6.6 attached to a pedestal 5, continuously rotates the base shaft 12 by a chino 11, and connects a rotating shaft 27 to one end of an arm 26 attached to one end of the base shaft 12. Through the disc cutter 21
is attached, and the disc cutter 21 is configured to revolve around the base shaft 12 while being rotated by the rotating shaft 27.

The base shaft 12 is formed into a pipe shape, and an intermediate shaft 24 that penetrates the base shaft 12 in the length direction is disposed inside the base shaft 12 .

This intermediate shaft 24 is rotated by a power transmission mechanism 23 consisting of a motor 22 installed on the frame 5, a pulley, a belt, etc.

A rotating shaft 27 provided at one end of the arm 26 is supported at a predetermined distance from the base shaft 12 in the outer circumferential direction, and the rotating shaft 27 transfers the power from the intermediate shaft to a pulley, belt, etc. It is rotated by being transmitted through a power transmission mechanism 28.

The disc cutter 21 has an appropriately sized diameter, and rotates on its own axis as the rotating shaft 27 rotates, and also revolves around the base shaft 12 as the base shaft 12 rotates.

The log feeding devices 3, 3 include a pair of front and rear sprockets 32, 32, 3 arranged at a long interval in the front and back direction.
3 and 33, respectively, and a long log 2 is installed on each of the endless chinos 31 and 31.
It is constructed by fixing upright plate-shaped log pressers 34 and 34 for transferring the 0 to the front (downward side in the feeding direction).

The log feeding devices 3, 3 drive the endless chinos 31, 31 with their upper sides facing forward (downward in the feeding direction) using power from a power source such as a motor.

Further, this log feed device 3.3 is operated by an indexing machine (not shown) at the same period as the revolution period of the disk cutter 21, and in the upward movement stroke after the disk cutter 21 passes the lowest position. It is driven intermittently over a period of time.

Note that the amount of one drive of the log feeding devices 3, 3, that is,
The length L (FIG. 4) of one advance of the log presser 34 attached to the endless chino 31 is adjusted to be the same length as the length 1 of the log 20X to be the product.

Above each endless chino 31, 31, guides 35, 35 for guiding the long log 20 are installed on the endless chino 3, respectively.
The vehicle is disposed facing the direction of travel.

Before opening and closing by air cylinders 38 and 39, there are provided on both sides of the lowermost moving position of the disc cutter 21, respectively.
Rear roll catchers 36 and 37 are provided.

These roll catchers 36, 37 each have a disc cutter 21.
When moving downward to cut the long log 20, the long log 2
This is to press and hold both the front and back sides of the cutting position of 0.
The opening has the same period as the revolution period of the disc cutter 21, and is opened when the log feeding device 3 is driven, and closed when cutting the log.

The log holding device 4 includes front and rear roll catchers 36.
, 37, and a total of four log holding devices 4, 4, . . . are provided in this log cutting machine.

In this embodiment, the log feeding devices 3, 3 are arranged in two rows, but in other embodiments, the log feeding devices 3 can be provided in three or more appropriate number of rows. The number is increased according to the number of log sending devices 3.

Each of the log pressing devices 4, 4, . The concave arc-shaped lower surface 49 is maintained in a substantially horizontal state and is supported by a support device 50 so as to be movable in both diagonal directions, upward on the lower side in the feeding direction and lower on the upper side in the feeding direction, Further, the log pressing member 41 is configured to be urged downward by a spring 40.

The log pressing member 41 is formed in the shape of an inverted gutter with an arcuate inner surface, and a raised portion 42 is integrally formed on the upper surface side of the log pressing member 41 facing upward.

Also, the rear end of the lower surface of the log pressing member 41 (upper side in the feeding direction)
is bent diagonally upward (reference numeral 49a) so that the log 20 can easily enter below the log pressing member 41.

The length of this log pressing member 41 is preferably about 20 to 40α, and the log pressing member 41 on the lower side in the feeding direction is formed to be slightly shorter than the pressing member 41 on the upper side.

Each of the support devices 50, 50, .

That is, the lower ends of the support rods 51, 51 are pivotally connected to the protrusion 42 of the log pressing member 41 with pins 43, 43 with the lower ends of the support rods 51, 51 spaced apart from each other by a predetermined distance in the feeding direction. The side plate 16 (support device 50 on the lower side in the feeding direction) whose upper end is fixed to the main body frame side with pins 44 and 44
) or by being pivotally attached to the top plate 17.

Further, the two support rods 51, 51 are attached substantially parallel to each other, so that the log pressing member 41 can swing in the front-rear direction (log feeding direction) while being maintained in a horizontal state.

In addition, this log pressing device 4 is in a state in which the log pressing member 41 is swung downward in the feeding direction, that is, each support rod 51,
51 downward in the feed direction (incline angle: 3
Stoppers 52 and 53 are provided to prevent the log pressing member 41 from moving further diagonally downward on the upper side in the feeding direction in the state where the log pressing member 41 is moved (0° to 50°).

That is, the log pressing member 41 on the downstream side in the feeding direction is attached to the side plate 16.
A protruding rod-shaped stopper 52 that protrudes inward from the
The log pressing member 41 on the upper side in the feeding direction is brought into contact with the side surface on the upper side in the feeding direction of one support rod 51 (on the upper side in the feeding direction), and the log pressing member 41 on the upper side in the feeding direction is a vertical plate arranged behind it (on the upper side in the feeding direction). By bringing the bolt-type stopper 53 supported by the log pressing member 41 into contact with the rear end surface of the log pressing member 41,
It is possible to restrict swinging diagonally downward to the upper side in the feeding direction.

Further, each of the stoppers 52, 53 can be adjusted to move forward and backward, and by adjusting the position of the stoppers 52, 53, the lowest moving position of the log pressing member 41, 41 can be adjusted. It is now possible to do so.

Note that the lowest moving position of the log pressing member 41 is such that its lower surface is lower than the upper surface of the log 20 moving on the guide 35.
In addition, the position (height) is determined such that the front end of the log 20 can enter below the upper bent portion 49a of the rear end of the log pressing member 41.

Further, this log pressing member 41 is urged diagonally downward on the upper side in the feeding direction by a spring 40.

This spring 40 biases the log pressing member 41 downward to prevent the long log 2 being transferred on the guide 35.
0 (or product log 20X) from above to generate a predetermined frictional force between the lower surface of log pressing member 41 and the surface of log 20 (or 20X).

The strength of this frictional force (frictional force between the lower surface of the log pressing member 41 and the surface of the log 20) is such that when the log 20 is moved forward by the log pressing element 34, the log 20 moves forward. It is sufficient that the log presser 34 is not pushed out longer than the forward movement length L per time due to inertia.
Specifically, the pressure of the log pressing member 41 is adjusted by adjusting the spring strength of the spring 40 while taking into consideration the size of the contact area between the lower surface (concave arc surface 49) of the log pressing member 41 and the surface of the log 20. pressure is determined.

In this log pressing device 4, the log pressing member 41 can swing diagonally upward on the downstream side in the feeding direction from the position where it contacts the stopper 52 (or 53), so that the log 20 When the log pressing member 41 is moved forward by being pressed by the spring 40, the log pressing member 41 is moved diagonally upward on the downstream side in the feeding direction instantaneously and by a minute range against the biasing force of the spring 40. After the movement of the log 20 is completed, the log pressing member 41 presses the surface of the log 20 with the original pressing force due to the urging force of the spring 40.

Next, to explain the operation of the log cutting machine according to the embodiment shown in FIGS. When the cutter 21 reaches the lower position, the long log 2
The end side of 0 (upper side in the feeding direction) is the length of the final product 1
It is designed to only disconnect.

Note that during log cutting, the log catchers 36 and 37 are closed by the respective air cylinders 38 and 39, and
The log catchers 36 and 37 are opened during the upward stroke of the cutter 21 to allow the log 20 to pass through.

Further, the log feeding device 3 operates to drive the endless chino 31 forward by a predetermined pitch L when the cutter 21 is in the upward stroke, and at this time, the log presser 34 moves the long log 20 forward.

Since this log feeding device 3 is driven in a short time (almost instantaneously) each time, the long log 20 that is moved forward at that time has a large inertia during its movement. The long log 20 (or product log 20
The pressing action ensures that the product is pushed out by a predetermined size 1 (product size).

Further, when the long log 20 is moved forward, the log pressing member 41 is moved slightly up in height to allow the movement of the long log 20 (or the product log 20X). The log pressing member 4 can be moved diagonally upward on the downstream side in the feeding direction.
In other words, when the long log 20 starts moving forward, the frictional force between the lower surface of the log 20 (or 20 It is designed so that it can be moved smoothly.

Note that the concave arcuate lower surface 49 of the log pressing member 41 is in contact with the upper surface of the long log 20 (or product log 20X) almost entirely, and the width of one unit of the log pressing member 41 is The pressing force is reduced.

Next, to explain the effect of the present invention, the log cutting machine of the present invention has a log holding device 4 that has a shape that is almost the same as the outer circumferential shape of the log 20 so that the long log 20 is extruded accurately by a constant size. Since the log pressing member 41 having a concave arcuate lower surface 49 and having an appropriate length in the feeding direction presses the upper surface of the log 20 (or 20X), the lower surface of the log pressing member 41 The contact area between 49 and the upper surface of the log 20 becomes larger, and therefore the frictional force per unit between the two becomes smaller, making it difficult for wrinkles to occur on the upper surface of the log 20 when the log 20 moves forward.

Further, the log pressing device 4 of the log cutting machine of the present invention supports the log pressing member 41 so as to be movable in both diagonal directions, upward on the lower side in the feeding direction and lower on the upper side in the feeding direction. The upward movement of the log pressing member 41 for allowing the forward movement of the long log 20 is performed smoothly, the frictional force during the forward movement of the log 20 is reduced, and the occurrence of wrinkles on the upper surface of the log 20 is further prevented. It has the effect of being able to prevent this.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional log cutting machine, Fig. 2 is an explanatory diagram of the operation of the log cutting machine of Fig. 1, Fig. 3 is a perspective view of a log cutting machine according to an embodiment of the present invention, and Fig. 4 is a perspective view of a log cutting machine according to an embodiment of the present invention. Fig. 3 is an explanatory diagram of the operation of the log cutting machine, Fig. 5 is a side view of main parts of the log cutting machine in Fig. 3, and Figs. 6 and 7 are VI-VI and ■-■ cross sections of Fig. 5, respectively. It is a diagram. 2... Cutter device, 3... Tag feeding device, 4... Tag holding device, 20... Marking,
21... cutler, 34... log presser,
40... Spring, 41... Tag pressing member, 49... Bottom surface of tag pressing member, 50...
...Support device, 51...Support rod.

Claims (1)

[Scope of utility model registration request] The cylindrical long log 2 is moved forward by the log presser 34, which is intermittently advanced downward in the feeding direction by a predetermined pitch.
a cutter device 2 having a log feeding device 3 configured to be able to transfer logs 20 by a predetermined size to the downstream side in the feeding direction; and a cutter device 2 having a blade 21 disposed above the log feeding device 3 and for cutting the long logs 20. and near the upper side or lower side of the cutting position where the long log 20 is cut in the feeding direction,
A log cutting machine equipped with a log pressing device 4 for pressing the long log 20 or the cut product log 20X with a predetermined pressure so that the long log 20 is accurately extruded by a constant size, The log holding device 4 has a concave arcuate lower surface 49 that is approximately the same shape as the outer peripheral shape of the log 20.
The log pressing member 41, which is formed to have an appropriate length in the log feeding direction, is pressed so that the concave arcuate lower surface 49 is maintained in a substantially horizontal state, and furthermore, the log pressing member 41 is formed to have an appropriate length in the log feeding direction. A log cutting machine characterized in that it is supported by a support device 50 so as to be movable in both diagonal directions below the side, and further configured so that the log pressing member 41 is biased downward by a spring 40 or the like. .