JPH0811977B2 - Cam-shaped variable mechanism and continuous gluing machine using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The invention of the present application is configured such that one cam used for a cam follower is composed of two cam plates arranged side by side, and an apparent position is changed by changing the relative positional relationship between the two cam plates. The present invention relates to a cam mechanism that can change the cam shape as appropriate, and relates to a cam shape changing mechanism that can change the relative positional relationship between both cam plates during rotation without stopping rotation of the cam. The present invention relates to an application of a lever changing mechanism to a continuous sizing machine.

[0002]

2. Description of the Related Art Conventionally, there has been a cam mechanism in which one cam is composed of two adjacent cam plates, and the apparent cam shape is appropriately changed by changing the relative positional relationship between the two cam plates. And is at the current state of the art. A general configuration example of such a cam mechanism is as shown in FIG.
The cam plate 60a is fixed to one cam shaft 61, and the other cam plate 60b is rotatably attached to the cam shaft 61 adjacent thereto. Then, the cam plate 60b is fixed to the cam plate 60a at an appropriate position by a fixing screw 63 that moves along the opened arc-shaped long hole 62. As a result, the apparent shape of the cam 60 is changed, and the operation locus to the cam follower (not shown) following this is changed,
It is supposed to change the work to the outside.

That is, to explain this with reference to FIG. 6, when the relative position of the cam plate 60a and the cam plate 60b is rotated by a central angle α and shifted, the operating range of the cam 60 as the cam crest 60m is the central angle. When the relative position is set to A and the relative position is rotated by the central angle β and displaced, the operating range of the cam crest 60m can be set to the central angle B. In this way, the operation process of the cam 60 is appropriately changed.

[0004]

However, each time the operating range of the cam crest 60m is changed, the rotation of the cam 60 is stopped, the fixing screw 63 is loosened, and the cam plate 60b is rotated by a certain amount. After this, the fixing screw 63 had to be tightened again to be fixed. And cam 60 again
It was judged whether or not the working area of the cam crest 60m was appropriate by rotating the and looking at the work result to the outside. If it is not appropriate, the above-mentioned work must be repeated many times until the desired result is obtained, and this setup is very complicated.

Further, in the recent production process where delicate positioning and precision are required, the above-mentioned setup work takes a lot of time and has been an important problem to be solved from the viewpoint of improving work efficiency. Therefore, the present invention is intended to solve such a problem, and a cam-shaped variable mechanism capable of appropriately moving the relative positions of both cam plates while normally rotating the cam without stopping the rotation of the cam. Is provided. In addition, the present invention provides an application example of the cam-shaped variable mechanism to a continuous gluing machine for sticking back covers of bound books.

[0006]

In order to solve the above problems, the cam-shaped variable mechanism of the present invention is constructed as follows. The first and second phase adjusting mechanisms of the same configuration using a so-called flex-meshing reduction mechanism (trade name “Harmonic Drive”) are arranged side by side, and the output side of the first phase adjusting mechanism and the second phase adjusting mechanism are arranged side by side. The input side of the two-phase adjusting mechanism is connected. The wave generator of the first phase adjusting mechanism is fixed to a storage case or the like and is prevented from rotating,
Further, the wave generator of the second phase adjusting mechanism is connected to an adjusting motor for changing the phase. This constitutes a cam plate variable unit.

Next, the input side of the first phase adjusting mechanism,
Also, two cam plates each having an independent cam shaft are connected to the output side of the second phase adjusting mechanism via gears having the same number of teeth. These two cam plates are juxtaposed such that the rotation center axes of the cam shafts of the two cam plates coincide with each other and the side faces of the cam plates are close to each other with a minute gap.
In this way, the two cam plates form a cam unit that acts on the cam flow as one cam.

Further, the above-mentioned 2 constituting the cam unit.
A cam drive unit such as an electric motor that rotationally drives the cam is connected to the cam shaft of one of the cam plates. Furthermore, when the output side of the first phase adjusting mechanism and the input side of the second phase adjusting mechanism are connected and the output side 10o of the first phase adjusting mechanism is set to the phase delay (or the phase advancing), The output sides of the two-phase adjusting mechanism are coupled so as to be opposite to each other such that the phase is advanced (or delayed).

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of a specific embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing the basic configuration of a cam-shaped variable mechanism according to the present invention, and FIG. 2 is a sectional view of a specific embodiment of the cam-shaped variable mechanism. As described above, the present invention mainly comprises the cam plate variable unit 1, the cam unit 2, and the cam driving means 3.

The cam plate variable unit 1 is constructed as follows. First, the two first and second phase adjusting mechanisms 10 and 11 having the same structure using a so-called flexible mesh type reduction mechanism are arranged side by side so that the rotation centers are coaxial. The output side 10o of the first phase adjusting mechanism 10 and the input side 11i of the second phase adjusting mechanism 11 are cylindrical connecting pipes 12
And the bearings 13,
It is coaxially held by a cylindrical joint pin 14 via 13. On the input side 10i of the first phase adjusting mechanism 10 and the output side 11o of the second phase adjusting mechanism 11, gears 1 having the same number of teeth as the cam unit 2 described later are provided.
5 is attached.

Next, the wave generator 16 of the first phase adjusting mechanism 10 is fitted with a rod 18 fixed to a storage case 17 to prevent its rotation. Further, the wave generator 19 of the second phase adjusting mechanism 11 is connected with an adjusting motor 20 such as a pulse motor and a stepping motor for changing the phase via a coupling 21.

Here, in coupling the output side 10o of the first phase adjusting mechanism 10 and the input side 11i of the second phase adjusting mechanism 11, the above-mentioned two phase adjusting mechanisms 10, 11 are connected.
Is a homogenous structure, and when the output side 10o of the first phase adjustment mechanism 10 is the one with the phase delayed (or the one advanced), the output side 10o of the second phase adjustment mechanism is the one with the advanced phase ( (Or the one that is delayed), they are connected in the opposite directions.

Thus, normally, when the phase adjusting mechanism is used alone, the phases on the output side are made different when the adjusting motor 20 is stopped, so that the input and the output are different. When using the same phase, the adjustment motor 2
It was necessary to rotate 0 in synchronization. However, in the configuration of the present application, it is not necessary to rotate the adjusting motor 20 in synchronization with each other at all times, and when the wave generator 19 is in the stopped state, the input side 10i of the first phase adjusting mechanism 10 and the second phase adjusting mechanism are not provided. The output side 11o of 11 is rotated in the same phase.

By the way, the phase adjusting mechanisms 10 and 11 used in this embodiment are generally commercially available, and preferably, a differential unit using a harmonic drive (trademark) mechanism of Harmonic Drive Systems, Inc. Is used. Although such a mechanism is already known and its details are omitted, the basic outline is as follows. That is, the wave generators 16 and 19 having an elliptical shape, and the flexible thin-walled cylindrical flexspline 23 having teeth formed on the outer periphery and annularly mounted on the wave generators 16 and 19 via bearings 22, The flexspline 23 is composed of a rigid cylindrical circular spline that meshes externally in a state of being bent in an elliptical shape. By encircling, one of the circular splines is set to the input side 10i, 11i, and the other circular spline is set to the output side 10o, 11i.
and by appropriately changing the rotation speed of the wave generator 19 connected to the adjusting motor 20,
The input and output rotational phases can be adjusted appropriately.

Next, the cam unit 2 is constructed as follows. Two cam plates 30 having predetermined cam ridges,
31 are juxtaposed side by side with a minute gap 32 therebetween. Both cam plates 30 and 31 are not connected,
The cam shafts 33 and 34, which are independent from each other, are configured to be capable of independent rotation.

Each of the cam shafts 33, 34 has a bearing 35,
The cam plates 30 and 31 are rotatably held in the storage case 17 via 35, ... And are arranged so as to be exposed to the outside from the opening 36 of the storage case 17. The two cam plates 30 and 31 act as a cam 37, and act on the cam follower 38 that follows the cam 37. Further, since the cam drive means 3 is connected to either one (or both) of the cam shafts 33 and 34, the storage case 1
7, a drive rod 39 extending outside is integrally formed. Further, on each cam shaft 33, 34, there are the same number of teeth that mesh with the gears 15 that are fixedly attached to the input side 10i of the first phase adjusting mechanism 10 and the output side 11o of the second phase adjusting mechanism 11, respectively. The gear 40 is attached and fixed.

[0017]

Next, the operation of the above configuration will be described.
Drive means 3 such as an electric motor connected to the drive rod 39
The rotational force is transmitted to the cam plate 30 by the
Rotates at a predetermined cycle (arrow a). At the same time, the gear 40 attached to the cam shaft 33 and the gear 15 meshed with the gear 40 allow the input side 10 of the first phase adjusting mechanism 10 to move.
The rotational force is transmitted to i (arrow b). Since the wave generator 16 of the first phase adjusting mechanism 10 is fixed, the rotation is transmitted to the output side 10o with a certain phase delay (or advance) (arrow c).

This rotation (arrow c) is transmitted to the input side 11i of the second phase adjusting mechanism 11 fixedly connected by the connecting pipe 12 to the input side 11i. At this time, since the first phase adjusting mechanism 10 and the second phase adjusting mechanism 11 are connected in reverse, the phase-advanced (or delayed) rotation (arrow e) is transmitted to the output side 11o. Next, this rotation (arrow e) causes the cam plate 37 to rotate (arrow f) using the gears 15 and 40 as a transmission medium.

At this time, since the adjusting motor 20 is not rotating, the input side 10i of the first phase adjusting mechanism 10 and the second
The output side 11o of the phase adjusting mechanism 11 has the same phase and the same rotation speed. That is, the cam plates 30 and 31 rotate as if they were integrated. These constitute the cam 37 and drive the cam follower 38 (arrow g).

Next, when the adjusting motor 20 is appropriately rotated stepwise (arrow h), the output 1 of the second phase adjusting mechanism 11 is changed.
The phase of 1o changes, and the relative positional relationship between the cam plate 31 and the cam plate 30 changes while rotating with the cam plate 30. While the adjustment motor 20 is rotating, the cam plate 31 moves, and when the rotation is stopped, the movement of the cam plate 31 also stops and the rotation continues in synchronization with the cam plate 30.
In this way, the apparent cam crest shape of the cam 37 composed of the dualizing cam plates 30 and 31 can be appropriately changed according to the rotation time of the adjusting motor 20.

[0021]

[Application Example] Next, an application example of the cam-shaped variable mechanism of the present application to a continuous gluing machine for sticking back covers of bound books will be described. 3 and 4 are explanatory views conceptually showing the main part mechanism. The applied continuous gluing machine is generally configured as follows. That is,
The bound books 41 are held continuously by the moving means 43 with the spine 42 to which the spine cover is attached facing downward (arrow i). Then, the back portion 42 has a glue liquid 44.
The glue liquid 44 is attached to the glue coating drum 45 that constantly rotates in a state where the lower outer peripheral surface is wetted. Here, in order to prevent the glue from sticking out when the spine cover is attached, the adhesion of the glue liquid 44 needs to be suppressed at a position slightly inside the corner portion 46 of the spine portion 42.

For this reason, it is necessary to scrape off the excess glue liquid 44 by the scrubber 47 in the glue coating drum 45 in accordance with the length of the spine 42 of the book to be glued. In this case, the scrubber 47 is moved in synchronism with the interval of the books 41 which are sequentially moved (arrow i) (arrow J) by the lever mechanism 48 and the cam mechanism linked with the moving means 43.

Further, FIG. 4 shows a mechanism different from that shown in FIG. 3, in which the belt 49 impregnated with the glue solution 44 is used instead of the method in which the glue solution adhering to the drum is scraped off by the scrubber. The belt drive mechanism 50 itself, which moves in contact with the back portion 42, moves up and down for a predetermined time by the cam mechanism and lever principle 48. In such a configuration, when the types of books 41, 41, ... Are changed and the length of the back portion 42 is changed, it is necessary to change the moving interval of the scrubber 47 accordingly. Here, conventionally, the setup work is performed by repeatedly stopping the machine, loosening the mounting screw of the cam plate to change the cam shape, tightening the screw and rotating again, and checking the adhered liquid 44 adhesion state. Was going on.

Therefore, if a cam-shaped variable mechanism of the present invention is used as the cam mechanism, the cam shape can be changed quickly and easily without stopping rotation, and the adhering state can be easily adjusted. You can

[0025]

[Effects] The following effects can be obtained by configuring the cam-shaped variable mechanism of the present application as described above. Since two phase adjusting mechanisms of the same structure are juxtaposed and the outputs and inputs are reversed and connected to each other as an integrated phase adjusting mechanism, rotation of the same phase is possible while the adjusting motor is stopped. Can be taken out, and the adjustment motor can be driven only when the phase is changed and taken out. This has an advantage that it is not necessary to rotate the wave generator in synchronization with each other as in the case of extracting the same phase with one phase adjusting mechanism.

Further, since two cam plates, which are driven by independent cam shafts, are arranged close to each other to form one cam, the rotation of the cams can be changed by appropriately changing the rotation phase of those cam plates. It is possible to change the apparent cam shape while rotating without stopping. Therefore, the setup work can be performed in a short time, the work efficiency can be improved, and the defective rate of the product can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a basic configuration of a cam-shaped variable mechanism in the present invention.

FIG. 2 is a cross-sectional view of a specific example of a cam-shaped variable mechanism according to the present invention.

FIG. 3 is an explanatory view conceptually showing a main part mechanism of an application example of the cam-shaped variable mechanism of the present application.

FIG. 4 is an explanatory view conceptually showing a main part mechanism of another application example of the cam-shaped variable mechanism of the present application.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is a plan view illustrating a change in apparent cam shape.

[Explanation of symbols]

1 ... Cam plate variable unit 2 ... Cam unit 3 ... Cam driving means 10 ... First phase adjusting mechanism 10i ... (Input side of the first phase adjusting mechanism) 10o ... Output side (of first phase adjusting mechanism) 11 ... Second phase adjusting mechanism 1
1i ... ・ Input side (of second phase adjusting mechanism) 11o ・ ・ ・ ・ Output side (of second phase adjusting mechanism) 2
0 ... Adjusting motor 30, 31 ... Cam plate 32 ... Micro gap 3
3, 34 ... Cam shaft 37 ... Cam 38 ... Cam flower
41 ... Books 42 ... (Books) back 43 ... Movement means 44 ... Glue liquid 45 ... Glue application drum 46 ... (Books) corner 47. ..Scever 48 ...
Cam mechanism 49 ... Belt 50 ... Belt drive mechanism

Claims (4)

[Claims] 1. A first and a second phase adjusting mechanism (10, 1) having a homogenous structure using a so-called flexible mesh type reduction mechanism (trade name "Harmonic Drive").
1) are arranged side by side, and the output side (1
0o) and the input side (11i) of the second phase adjusting mechanism (11)
And the wave generator (16) of the first phase adjusting mechanism (10) is fixed, and the adjusting motor (20) is connected to the wave generator (19) of the second phase adjusting mechanism (11). A variable cam plate unit (1), an input side (10i) of the first phase adjusting mechanism, and a second
Two cam plates (30, 3) having independent cam shafts (33, 34) are provided on the output side (11o) of the phase adjusting mechanism via gears (15, 40) having the same number of teeth.
1) are connected to each other, and these two cam plates (30, 31) match the rotation center axes of the cam shafts (33, 34) with each other, and the side surfaces of the cam plates have a minute gap (32). ), The two cam plates (3
Cam unit (2) configured to act on the cam follower (38) as one cam (37) with 0, 31), and one of the two cam plates (30, 31) And a cam driving means (3) connected to the cam shaft of the above. 2. In the connection between the output side of the first phase adjusting mechanism and the input side of the second phase adjusting mechanism, the output side (10o) of the first phase adjusting mechanism is set as the phase delay (or advance) side. 2. The cam according to claim 1, wherein the output side (11o) of the second phase adjusting mechanism is coupled so as to be opposite to each other so that the phase is advanced (or delayed). Variable shape mechanism. 3. A glue applying drum (45) which constantly rotates in a state where a lower outer peripheral surface is soaked in a glue liquid (44) and a lever mechanism and a cam mechanism (48) for a preset time only by a glue applying drum (45). ) And a scrubber (47) configured to scrape off the attached glue by contacting the surface of the (4), and the spine (4) of the books (41) bound on the outer peripheral surface of the glue applying drum.
In a continuous gluing machine, in which 2) is brought into contact with each other to continuously perform gluing for attaching a back cover, a cam shape for determining a time for which the scrubber (47) is in contact with the gluing drum (45) is set. Or a continuous gluing machine characterized in that it can be changed at any time by the cam-shaped variable mechanism described in 2. 4. A continuously rotating gluing belt drive mechanism (50) permeated with a sizing liquid (44) is itself a cam mechanism (48).
Books bound up and down by a predetermined time by (41)
In a continuous gluing machine for contacting the back part (42) of the gluing belt and continuously gluing the spine for sticking the spine cover, the cam shape for deciding the vertical movement time of the gluing belt drive mechanism itself is defined by claim 1 or A continuous gluing machine characterized in that it can be changed at any time by the cam-shaped variable mechanism described in 2.