JPH0397406A - Shoe clamp device in shoe making machine - Google Patents

Abstract

PURPOSE:To position and fix a set of a shoe main body correctly without an error by providing a pair of a right and a left support pieces for supporting the underside of a tip of the shoe main body from the right and the left, and a means to drive them to be freely opened and closed. CONSTITUTION:A tip clamp mechanism part 5 comprises a pair of a right and a left support pieces 7 having diagonal parts 7a at 45 deg. facing each other in the upper surfaces for supporting the underside of a tip part 1b of a shoe main body 1 from the right and the left, a cylinder S1 having a brake as a drive means for driving them, and a presser arm 8 in the form of a Z-letter provided to be rotated by drive force of a cylinder S2 as a drive means having a jaw part 8a to be applied to a bisector position of the upper surface of the tip part 1b for restricting its installation height. For making the tip clamp mechanism part 5 freely movable to a heel clamp mechanism part 6, the forward end of the cylinder rod of a cylinder S3 is fixed at a carriage 10 where the tip clamp mechanism part 5 is mounted to slide freely along two guide rails 9 installed at an upper and a lower part of a work table 3, so the carriage 10 is moved freely along the guide rails 9 by is expansion and contraction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a shoe manufacturing method that clamps the upper leather together with a shoe last when manufacturing shoes, and can be optimally applied to shoe manufacturing machines such as sizing machines and napping machines. This invention relates to a shoe clamping device for use in a machine.

[Conventional technology]

Conventionally, in gluing machines and napping machines used to manufacture leather shoes, the shoe body is placed face up along with the shoe last on a processing table in order to bond the outsole and the shoe body (upper leather). ,
Equipped with a clamping device to keep it in place.

This clamp device includes a toe clamp section for supporting the toe section of the shoe body and a heel clamp section for clamping the heel section. Then, one or both of the toe clamp section and the heel clamp section was provided on the processing table.

As a conventional example of these toe clamp parts and heel clamp parts, for example, the right and left sides are moved by a driving means such as a cylinder.
There was a shoe that had a structure in which a pair of clamping arms were driven to open and close freely, and the shoe was clamped together with the last with the upper facing upward, and set and fixed on a processing table.

[Problem to be solved by the invention]

Incidentally, a pair of left and right shoes constitutes one pair, and their shapes are approximately symmetrical and different. Designs have also become more diverse,
Since the sizes vary, the processing conditions are not uniform.

High accuracy is required in the setting position of the shoe body by the clamp, but in the conventional clamping device described above, the stroke of the pair of left and right clamping arms is constant;
Since the processing conditions of the shoe bodies to be set are different, for example, on the left and right sides, it is difficult to accurately select and set the setting positions of the pair of left and right shoe bodies, resulting in errors in the setting positions. In particular, since the toe portion is formed in a curved line from the tip to the arch portion, curving from the inside to the outside, it is difficult to select the center in the width direction of the heel portion. In particular, the shape of the toe part of a pair of left and right shoe lasts is symmetrically significantly different, so
The expanded area of error becomes even larger.

Therefore, when gluing is performed in a gluing machine, the contact position of the nozzle with respect to the shoe body (upper skin) is caused by a setting error, and the dispersion caused by this setting error causes misalignment of the glued area.

Furthermore, errors occurred in the position of the nap on the upper skin by the napping machine, resulting in poor product yield.

[Means to try to solve the problem]

The present invention has been made in view of the above points, and includes a toe clamp mechanism that clamps the toe of a shoe body as a workpiece that is set on a processing table with the bottom facing upward;
A heel clamp mechanism is provided on the central axis in the longitudinal direction of the toe clamp mechanism and clamps the heel of the shoe body, and the toe clamp mechanism supports the lower surface of the toe of the shoe body from left and right sides. It is formed from a pair of left and right support pieces provided on the upper surface with sloped parts facing each other, and one driving means for driving the support pieces to open and close freely. It consists of a pair of left and right clamping arms of the clamp part, a support bar that holds the clamping arms slidably in opposite directions via a spring material, and other driving means that drives the clamping arms so that they can be opened and closed. We adopted the method of

[For production]

Glue is applied to the upper surface and outer edge of the shoe body (upper),
Before performing the napping process, set and fix the shoe with the last on the processing table with the upper leather facing upward.

When the start switch or the like is pressed in this manner, the toe clamp mechanism approaches the heel clamp mechanism.

Next, the driving means of the heel clamp mechanism and the toe clamp mechanism provided on the central axis in the longitudinal direction are driven, so that the pair of left and right support pieces close in opposing directions, and the left and right sloped portions close to the toe of the shoe body. The setting position of the toe portion is moved onto the longitudinal central axis of the heel portion by pressing the portion to correct it.

Finally, the pair of left and right clamping arms of the heel clamp mechanism are closed by the drive means to clamp the heel of the shoe body.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the case where this invention is applied to the gluing machine is demonstrated as an example according to drawing.

Figures 1 and 2 show the overall outline of the device as a gluing machine.
This is a shoe body as a workpiece which is placed over the body and removably attached to a support base 4 provided on a processing table 3.

Reference numeral 5 denotes a toe clamp mechanism section provided on the upper surface of the processing table 3, and this toe clamp mechanism section 5 is for clamping the toe section 1b of the shoe body 1a as the workpiece. A heel clamp mechanism 6 is provided on the longitudinal center axis A of the processing table 3 with respect to the toe clamp mechanism 5, and this heel clamp mechanism 6 is connected to the shoe body 1.
It is for holding the heel part IC of.

3 and 4, the toe clamp mechanism section 5 is movable relative to the heel clamp mechanism section 6, and is configured to support the lower surface of the toe section 1b of the shoe body (2) from left and right. , a slope section that slopes downward at approximately 45 degrees toward the heel portion 1c? Left and right l with a and 7a facing each other on the top surface
A pair of support pieces 7, 7, a cylinder St with a brake as a first driving means for driving the support pieces 7, 7 in opposite directions, and an upper surface of the toe portion lb of the shoe body 1. A jaw part 8a is provided at approximately two equal parts in the width direction of the pair of jaws 8a, which can freely come into contact with the support pieces 7, 7 at right angles and regulate the installation height of the toe part 1b. A substantially Z-shaped presser arm 8 is rotatably provided on the longitudinal center axis A perpendicular to and located between the support pieces 7 and 7 by the driving force of a cylinder S2 as a second driving means. It is formed.

In FIGS. 2 and 3, as means for making the toe clamp mechanism 5 movable relative to the heel clamp mechanism 6, two
The tip of the cylinder rond of the cylinder S3 is fixed to the movable table 10 which is slidably mounted on the guide rail 9.9 of the book and on which the toe clamp mechanism 5 is mounted, and the cylinder rond of the cylinder S3 is guided by the expansion and contraction of the cylinder rond. - The movable platform 10 is movable along the rails 9, 9.

Further, the cylinder Sl is vertically fixed approximately to the center shaft of the movable table IO using a mounting frame 11 (see FIG. 3).

In other words, in FIGS. 3 and 5, the driving means for making the pair of support pieces 7, 7 freely open and close left and right is a substantially dogleg-shaped drive means with the support pieces 7, 7 attached to the upper ends. The lower end of the movable arm 12.12 is rotatably pivoted using a pin 13.13 at a left-right position approximately in the vertically intermediate portion of the mounting frame 11, and one end is attached to the tip of the cylinder rond of the cylinder S1. Drive links 15 overlapped and pivotally connected by pins 14
, 15 is pivotally connected to the substantially intermediate portion of the pair of movable arms 12.12 using a pin 16.16.

Further, as means for rotatably driving the presser arm 8, a lower corner portion of the presser arm 8 is pivotally mounted within a mounting recess 11a provided on the upper surface of the mounting frame 11 using a shaft 17. A driving piece 8b, which projects outward from the corner at a substantially right angle, is pivotally attached to the tip of the cylinder rod of the cylinder S2 using a shaft 18 and a connecting member 19.

The lower end of the cylinder S2 is pivotally attached to a mounting plate 20.20 provided on the front surface of the mounting frame 11 using a shaft 21.

In addition, in FIGS. 3 and 6, the heel clamp mechanism section 6 includes l pairs of left and right clamping arms 22, 22 which can be opened and closed by a third driving means to clamp the heel portion 1c of the shoe body l. a main clamp part 23 having a main clamp part 23, and a pair of left and right clamping arms arranged below the main clamp part 23 and for clamping the shoe last 2 that covers the shoe body 1 in a manner that can be opened and closed by a fourth driving means. 24. A sub-clamp part 25 having a diameter of 24, and the main clamp part 23
By collaborating with the presser arm 8 of the toe clamp mechanism 5 and abutting against the heel IC of the shoe body l from the rear on the longitudinal central axis A, the upper surface is regulated without causing a setting error. The holding arm 26 is formed of a substantially C-shaped holding arm 26 which has a jaw portion 26a and is disposed in the front-rear direction (in the figure) opposite the holding arm 8 so as to be rotationally driven by a fifth driving means. Ru.

The main clamp section 23 is provided on the left and right sides of a support frame 27 having a substantially L-shaped cross section and fixed on the processing table 3 above the longitudinal center axis A so as to sandwich the longitudinal center axis A. Approximately at the center of the mounting portion 27a is a support shaft 28.
28, and the tip has gripping parts 22a, 22a.
a pair of left and right clamping arms 22.22 having a pair of left and right clamping arms 22.22; One end is connected to a pin 30a. to connect the rear part of the clamping arm 22.22 with the cylinder S as the fourth driving means, which has a retractable bi-directional cylinder rod 29.29. 30a is connected to the vicinity of the support shaft 28.28 of the clamping arm 22.22, and the other ends are overlapped with each other and are pivotally connected by a pin 30b.
A pair of left and right connecting links 32.3 formed in a substantially dogleg shape in which 0b is slidably and loosely fitted into a guide slit 32a.
2, and a pin is attached to the support frame 27 via a buffer spring (not shown) so as to be able to freely come into contact with the heel IC of the shoe body 1 on the central axis A in the longitudinal direction between the clamping arms 22. 34 and a heel detection member 33 attached by 34 (see FIGS. 4 and 6). The presser arm 26 has a cylinder S cylinder rod serving as a driving source, which is pivotally attached to the lower corner of the presser arm 26 by a shaft 26b, and the cylinder rod extends forward and backward in the figure around the mounting shaft 26c by the extension I1 of the cylinder rod. By rotating in the direction, it can be raised and lowered freely.

Further, the sub-clamp section 25 provided below the main clamp section 23 includes a pair of left and right clamping arms 24 which are opposite to each other and can be opened and closed, in order to clamp the shoe last 2 on which the shoe body 1 is placed from the left and right sides. , 24, a support bar 36 which holds the clamping arm 24, 24 slidably in opposite directions via an exterior coil spring 35, and the clamping arm 24.
．． Cylinders Sa. It is formed from Ss.

37 is a detection means for determining whether the set shoe last 2 is a left or right shoe and controlling the opening and closing of the pair of clamping arms 24, 24;
The coil spring 35 is replaced by two coil springs 35a, 35a.
The coil spring 35a.
A cylindrical body 38 as a movable part is slidably and loosely fitted to the support bar 36 so that coil springs 35a are disposed on the left and right and the spring biasing force of the coil springs 35a, 35a is always received at the intermediate part; The detection bar 39 is arranged below and near the cylinder body 38 so as to be able to freely engage with the cylinder body 38.

In FIGS. 1 and 3, the support base 4 on which either the left or right shoe last 2 that covers the shoe body 1 is removably fixed upward is connected to the toe clamp mechanism 5 and the heel clamp mechanism. It is installed near the heel clamp mechanism section 6 between the heel clamp mechanism section 6 and the heel clamp mechanism section 6 so that it can be raised and lowered and raised and lowered on the longitudinal central axis A.

The drive means for supporting the shoe last 2 in a vertically and vertically movable manner includes support shafts 41. A cylinder S7 for lifting and lowering is swingably supported by a shaft 41, and a lower end is pivoted by a shaft 42 to a mounting piece 40b provided at the lower end outside the mounting frame 40, and a cylinder rod 43 is attached to the outer periphery of the cylinder S7. A cylinder S for raising and lowering is pivotally connected using a shaft 45 to a mounting piece 44 provided in the
8.

In addition, in FIGS. 1 and 2, 46 is the processing table 3.
Above, the X-axis direction (horizontal direction perpendicular to the longitudinal central axis 8)X, the Y-axis direction perpendicular to the Vertical Z-axis direction perpendicular to direction Y (
While driving the shoe body 1 in three directions (height direction Z) and Z, following the upper surface and outer edge of the shoe body 1 (hereinafter, this refers to the state illustrated by the clamp device), the adhesive is discharged and applied. This is a nozzle body for This nozzle body 46 distinguishes left and right by looking at the processing data of one of the left and right shoe lasts 2, and also distinguishes between the left and right shoe lasts, for example, by changing the shape for each gender such as men's or women's, and by the type of design. Detects changes in shape, size, etc., and corrects the data through arithmetic processing by a computer to control the rotational direction and speed of each motor. It is designed to be driven in the Y-axis direction YSZ-axis direction Z via a moving table.

One embodiment of the present invention has the above-mentioned structure, and in order to perform the gluing work on the upper surface of the pair of shoe bodies 1 and the portion corresponding to the gluing margin on the outer edge, it is necessary to install the glue on the processing table 3. For example, the left shoe body 1 is placed on, for example, the left shoe last 2, which is removably fixed to a support rod above the support base 4, and set.

When a power button, a set button, etc. provided on a switch panel (not shown) is pressed, the cylinder S5 as a driving source is driven and the cylinder rod is extended, so that the holding arm 26 of the heel clamp mechanism 6 is pressed.
The corner portion as a pivot point of the shaft 26b is pushed up by the cylinder rod around the mounting shaft 26C, and the upper contact portion 2
6a rotates until it becomes approximately horizontal.

Next, the support base 4 on which the shoe last 2 is set and fixed is raised to a predetermined position by driving the cylinder S7, and the heel portion 1C comes into contact with the heel detection member 33. In addition, the heel IC of the shoe body I placed on the last 2 comes into contact with the abutment part 26a of the substantially C-shaped presser arm 26 that rotates almost horizontally, and the upper surface of the heel part 1c is restricted. Ru.

Next, the movable table 10 installed on the top surface of the toe clamp mechanism 5 moves as the cylinder rod of the cylinder S3 extends.
While being guided by the two guide rails 9.9, it moves toward the heel clamp mechanism 6 to a predetermined position according to the length of the shoe body 1, as shown in FIGS. 1 and 3.

As shown in FIGS. 3 and 4, the cylinder rond is extended by driving the cylinder S2 of the toe clamp mechanism 5, so that the front presser arm 8 has its jaw 8a horizontally centered on the shaft 17. The jaw portion 8a abuts on the upper surface of the toe portion 1b of the shoe body 1, which is set and fixed on the support base 4, at a bisected portion in the width direction. At this time, the presser arm 8 has a substantially Z-shaped overall shape, and the jaw portion 8a formed above abuts the toe portion 1b of the shoe body 1 from above in a substantially horizontal manner, so that the shoe body 1 is set and fixed. The setting position will not shift and the fixing accuracy will not be disrupted.

Thereafter, in FIGS. 3 and 5, when the cylinder S is driven and the cylinder rod is extended, the left and right l
Since the pair of left and right movable arms 12.12 are pushed by the pair of drive links 15, 15, this movable arm 12.1
2 rotate oppositely around the pins 13 and 13 and close, so that the lower surface of the toe portion 1b of the shoe body 1 is supported from below by the pair of support pieces 7, 7.

At this time, the upper surfaces of the pair of support pieces 7.7 are opposite to each other and sloped downwardly toward the heel IC direction. 7a is formed, the center bisect of the toe portion 1b of the shoe body 1 in the width direction is aligned with the longitudinal central axis A, regardless of whether the shoe body 1 has a right or left shoe last 2. As a result, the toe portion 1b of the shoe body 1 is accurately set and fixed within the horizontal plane. Next, when the cylinder rods 29 and 29 of the bidirectional cylinder S4 of the main clamp part 23 of the heel clamp mechanism part 6 are extended, the left and right clamping arms 22
．． 22 closes on the tip side around the pins 28.28, so that the gripping portions 22a. 22. The heel IC of the shoe body 1 is determined by a.
is held from the left and right.

Furthermore, since the cylinder rods of the cylinders Ss and S6 of the subclamp section 25 provided below the main clamp section 23 extend oppositely, the pair of clamping arms 24, 24 held horizontally by the support bar 36 can The two divided coil springs 35a . 3
5a(7) Close against elastic force. In this way, either the left or right shoe last 2 is clamped by the left and right clamping arms 24.24 of the sub-clamp section 25, but at this time, the shoe body 1 is clamped by the pair of clamping arms 22.22 of the main clamp section 25. In cooperation with the clamping action of the main clamp part 23 due to the clamping, the mounting accuracy of the shoe body 1 within the same horizontal plane becomes higher in either one of the clamped states than in either one of the clamped states.

At this time, the movable body is loosely fitted to the support bar 36 by the two-split coil springs 35a, 35a. cylindrical body 38
is always spring-biased at the center, so when either the left or right shoe last 2 is clamped by the pair of clamping arms 24, 24, the clamping arm 1 ．．
24. Since the amount of movement of 24 is different, when this cylinder 38 touches the detection bar 39, a change in the amount of movement is detected, and it is determined whether it is the left or right shoe last 2 (6th
See figure.

In this way, the pair of left and right support pieces 7.7 of the toe clamp mechanism 5, the left and right clamping arms 22, 22 of the main clamp 23 of the heel clamp mechanism 6, and the pair of sub-clamps 25 are The clamping arms 24 and 24 clamp the shoe body 1 so that the toe portion 1b and the heel IC of the shoe body 1 are aligned in two equal parts in the width direction on the longitudinal central axis A, and the shoe body 1 The heights of the toe portion 1b and heel portion 1c are determined from the front and back on the longitudinal central axis A by the presser arms 8 and 26 of the toe clamp mechanism 5 and heel clamp mechanism 6 (Figs. 3 and 4). See figure>
. Therefore, the shoe body 1 is clamped with high precision on the longitudinal center axis A, which serves as a reference, in three directions: front and back, left and right, and height. Then, the nozzle 46 is directed in the X-axis direction
Adhesive is supplied and applied by moving each movable table by a motor in three directions of the axial direction 2 based on processing data of one shoe last 2 through calculation processing by a computer.

Then, when glue is applied to the glue portion on the outer edge of the upper surface of either the left or right shoe body L, the cylinder S=;Ss. When the cylinder rod of Ss contracts, the main clamp part 23 and sub clamp part 25
The pair of clamping arms 22, 22; 24, 24 are opened and the clamp on the heel portion 1C is released. Next, the cylinder 31 of the toe clamp mechanism 5 and the cylinder rond of S2 are contracted, so that the presser arm 8 is moved to the toe part 1 of the shoe body 1.
At the same time, the left and right pair of support pieces 7, 7 are opened, and the support for the toe portion 1b is released.

Thereafter, the cylinder rod of the cylinder S3 contracts, and the moving platform I is guided by the guide rails 9, 9.
O moves backward, and the toe clamp mechanism 5 moves away from the heel clamp mechanism 6.

Then, as the cylinder rod of the cylinder S, contracts, the shoe body 1, which has been glued, descends together with the last 2 on the left side, and finally, as the cylinder rod of the cylinder Ss contracts, the rear presser arm 26 is moved back to its original position. to return to.

The gluing work is then completed by removing the glued left shoe body l from the shoe last 2.

Next, we will explain the operations for gluing the right shoe body 1. In this case, the right shoe body 1 is placed over the right shoe last 2 and set on the support stand 4, and the following operations are performed. is performed in the same manner as described above for the left shoe last 2.

That is, by similarly pressing the power button, set button, etc. provided on the switch panel, the cylinder Ss is actuated, and the heel clamp mechanism B6 is pressed into two equal parts in the width direction of the upper surface of the heel portion 1C of the shoe body L. The arm 26 is abutted and held down at the longitudinal central axis A, and then the cylinder S7
is driven to raise the support base 4, and then the cylinder S2 of the toe clamp mechanism section 5 is driven to bring the presser arm 8 into contact with the upper surface of the toe section 1b, and the cylinder S1
is driven to close the support piece 7.7 to position and support the toe portion 1b in the width direction on the longitudinal center axis A. Main clamp part 23 of the rear heel clamp mechanism part 6
and a pair of clamping arms 22, 22 of the sub-clamp section 25;
24, 24 to position the shoe body 1 in three directions, i.e., the front-rear direction, the left-right direction, and the height direction, by clamping the heel IC with the nozzle body 46. Based on the machining data, the machining data is processed by a computer to correct the machining data of the left shoe last 2 while moving in the X-axis direction xSY.
By moving the moving table in the axial direction Y1 and further in the Z-axis direction Z while controlling the rotational speed, direction, etc. of each moving table drive motor, adhesive is applied to the upper surface and outer edge of the right shoe body 1, and a pair of left and right shoes are assembled. Finish the gluing work for main body 1.1.

In the above embodiment, a shoe clamping device in a gluing machine for automatically applying an adhesive for bonding a shoe sole to the lower surface and outer edge of a shoe body was described as a typical embodiment. It is also used for gluing the heel of women's shoes to the heel of the sole, or for forming a sole by laminating several layers of resin or leather materials. Applicable to clamping devices in attaching machines, as well as clamping devices in other raising machines that perform raising treatment on the glue margin on the bottom and outer edges of shoe soles in order to make it easier to attach the shoe body to the sole using an adhesive. can.

〔Effect of the invention〕

As described above, even if the left and right shoe bodies are different, the setting position of either the left or right shoe last can be accurately positioned and fixed without error in accordance with the central axis in the longitudinal direction as a reference line. Based on the modified data of either the left or right shoe last, it can be used to help apply adhesive for bonding the sole to the upper surface and outer edge of both the left and right shoe bodies with high precision.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a side view, Fig. 3 is a front view showing the main parts, Fig. 4 is a partially omitted plan view, and Fig. 5. FIG. 6 is a side view of the toe clamp mechanism of this embodiment, seen from the front, and FIG. 6 is a side view of the heel clamp mechanism, seen from the front. DESCRIPTION OF SYMBOLS 1... Shoe body, 2... Shoe last, 3... Processing table, 4... Support stand, 5... Toe clamp mechanism part, 6...
... Heel clamp mechanism section, 7... Support piece body, 8, 26.
... Holder arm, 7... Support piece body, 23... Main clamp part, 25... Sub clamp part, 22.24
... Grasp arm, 36... Support bar, 35, 35a
... Coil spring, 38 ... Cylindrical body, 39 ... Detection bar, 46 ... Nozzle body, S + + St +
Ss * S4 + Ss + Ss t
St...Cylinder.

Claims (5)

[Claims] (1) A toe clamp mechanism that clamps the toe of a shoe body as a workpiece that is set on a processing table with the bottom facing upward; a heel clamp mechanism that clamps the heel of the shoe body, and the toe clamp mechanism includes a pair of left and right support pieces provided on the upper surface of the shoe body with sloped portions facing each other to support the lower surface of the toe of the shoe body from the left and right. The heel clamp mechanism includes a pair of left and right clamping arms of the main clamp part or the sub-clamp part, and a spring material for the clamping arms. A shoe clamping device for a shoe making machine, comprising a support bar that is slidably held in opposing directions via the support bar, and another driving means that drives the clamping arm so as to be openable and closable. (2) The toe clamp mechanism section and the heel clamp mechanism section have a shoe body on the longitudinal center axis located between the pair of support pieces and between the pair of clamping arms. Claim No. 1, characterized in that presser arms having jaws that can freely come into contact with the upper surfaces of the toe and heel from the front and back directions are provided facing each other so as to be rotated and driven by respective drive means. A shoe clamping device in the shoe making machine according to item 1. (3) The spring material is divided into two parts, and a first part is provided in the middle of the spring material, which is always biased to an intermediate position to distinguish between right or left shoes and to open and close the pair of said clamping arms. 2. A shoe clamping device for a shoe making machine according to claim 1, further comprising a detection means for controlling said drive means. (4) The detection means is provided in a main clamp section having a pair of clamping arms of the heel clamp mechanism section;
4. The shoe clamping device for a shoe making machine according to claim 3, wherein said shoe clamping device is provided on either one of said main clamp section or a sub-clamp section disposed below said main clamp section. (5) The detecting means detects a cylindrical body with the split spring material disposed on the left and right sides, which is slidably and loosely fitted to the support bar, and the clamping arm that is loosely fitted to the outside of the spring material. 4. A shoe clamping device for a shoe making machine according to claim 3, further comprising a detection bar connected to driving means for driving and capable of engaging with said cylinder.