KR102194043B1 - Automatic cutting machine - Google Patents

Abstract

The present invention relates to an automatic rotary cutting machine comprising: a first and a second supply guide (112) installed on an upper side of a lower body (110) and provided with a material discharge hole (111) at the center thereof; and a table (130) accommodated in an upper body (120) on one side of the first and second supply guides (112). The table (130) includes: a first and a second saw blade entry hole (131) formed on the left and right in a 45-degree direction around the material discharge hole (111); an installation base (133) provided between the first and second saw blade entry holes (131); and a first and a second operating hole (134) formed on both sides of the installation base (133) and penetrated to the lower body (110). The automatic rotary cutting machine further comprises: an operating unit (140) mounted on a lower side of the installation base (133) to be provided on the lower body (110); a first and a second driving unit (150) installed on the table (130) on both sides of the installation base (133) to be provided on the upper body (120); a first and a second cutting unit (170) symmetrically provided on one side of the first and second driving units (150) in parallel with the first and second saw blade entry holes (131), and linked to the operating unit (140) and the first and second driving units (150); and a first and a second rotary saw blade (191) which are mounted and linked to the first and second cutting units (170) respectively, and enter through the first and second saw blade entry holes (131) to cut the cross section of both materials at 45 degrees. The operating structure is simplified and the efficiency of the operating structure is improved to reduce energy and improve the durability and cutting quality of the machine.

Description

Automatic rotary cutting machine {AUTOMATIC CUTTING MACHINE}

The present invention is an invention related to a rotary automatic cutting machine, and more particularly, a cutting machine that automatically cuts the cut surfaces of both materials at a diagonal angle symmetrical to each other using a rotary saw blade, but simplifies and improves the operating structure to save energy. It relates to a rotary automatic cutting machine that improves the durability and cutting quality of the machine.

In general, when forming a structure in which both materials are orthogonal to form corners, such as a picture frame or furniture, the cross-sections of both materials are cut to be symmetrical to each other at 45 degrees using a cutter.

The conventional cutting machine is configured by installing a circular saw blade that rotates at high speed in combination with a motor on the table top and a guide on the table to fix the material in the direction of 45 degrees. Accordingly, the operator operates the saw blade up and down on the upper side of the material to cut the end of the material in the diagonal direction. The configuration of a cutter, which is typically used for cutting a material, is schematically described below with reference to known techniques.

As an example, in Korean Utility Model No. 20-0075083, an electric circular saw blade rotating by a drive motor built into the housing is provided with a cover wrapped, and the head on which the electric circular saw blade is installed extends upward from the rear of the base. It is supported so that it can swing with a fixed arm and an operation arm provided so that the length and angle can be adjusted from the fixed arm, and guides of the object to be cut are erected on both sides of the base, and angle adjustment handles are provided in the center of the base. Construct a circular saw.

As another example, in Korean Utility Model No. 20-1996-0028430, in a cutting machine in which a moving member is shaft-coupled to the end of a screw, a support part formed with a support surface and a shaft hole, and a fixed part with a guide groove and a protractor are integrally formed. One hwajeon member is installed on the front base of the moving member, and the shaft hole and the central shaft bar are axially coupled to be fixed to the base, and a cutting machine with bolts installed in the guide groove is constructed.

As another example, in Korean Patent Registration No. 10-1595913, a cutting blade is provided to cut the material supplied through the feeding machine by an elevating and descending operation, and the cutting blade is rotated around an angle adjusting axis to adjust the cutting angle, It constitutes a cutting device provided with a rotary table coupled to the center of the angle adjustment shaft and rotated by the driving means.

Korean Utility Model Registration No. 20-0075083 (1993.07.14) Korea Open Utility Model No. 20-1996-0028430 (1996.09.17) Korea Open Utility Model No. 20-1997-0021104 (1997.06.18) Korean Patent Registration No. 10-1595913 (2016.02.19)

The cutting machine to which the prior art as described above is applied has a configuration in which an operator lifts and lowers a rotating circular saw blade coupled to a motor to cut the end of the object to be cut fixed on the table.

However, as the conventional cutting machine as described above forms one cutting surface at a time by hand, workability and productivity are deteriorated, as well as a risk of safety accidents, and deviations in the cutting angle frequently occur between cutting objects. Thus, there is a problem such as lowering the completeness.

The conventional automatic cutting machine to improve such problems can improve workability compared to the existing manual method by mounting a configuration that automatically raises and lowers the cutting blade, but the driving means such as a motor and the cutting blade configuration It is composed of a structure in which the unit is vertically lifted, so that the scale of the device is increased and a lot of energy is inevitably consumed.

In addition, in the automatic cutting machine of the prior art, as the motor and the cutting blade move up and down as an integral part, the vibration generated by the motor is directly transmitted to the cutting blade and the entire device, thereby reducing the cut surface quality of the cut object and the installation and durability of the device are weak. Contain problems of losing.

Accordingly, in the present invention, as invented to solve the problems of the prior art as described above,
To form a tower-shaped exterior divided into an upper body 120 having a lower body 110 and a front cover 121 incorporating the material fixing means 122,
The first and second saw blade entry holes 131 installed on the upper side of the lower body 110 and accommodated in the upper body 120 and formed in the left and right directions of 45 degrees centering on the material discharge hole 111 provided in the center. ), and the mounting base 133 provided between the first and second saw blade entry holes 131, and the first and second operating holes 134 formed on both sides of the mounting base 133 through the lower body 110 The table 130 provided by the,
An operation unit 140 provided on the lower body 110 by being mounted on the lower side of the mounting table 133,
First and second driving parts 150 installed on the table 130 at both sides of the mounting table 133 and provided on the upper body 120,
Separately provided at one side of the first and second driving parts 150, provided parallel to and symmetrical to each of the first and second saw blade entry holes 131, and the operation part 140 and the first and second driving parts The first and second cutting portions 170 interlocked with 150,
Rotation including first and second rotating saw blades 191 that are mounted on each of the first and second cutting parts 170 and interlocked with each other and enter the first and second saw blade entry holes 131 to cut the cross section of the material on both sides by 45 degrees. In the automatic cutting machine,
The operation unit 140 provided in the lower body 110,
An installation bar 142 which is provided downward by coupling the upper end to the installation table 133 and mounts the vertical cylinder 141,
An operation table 143 that is coupled to the upper end of the rod of the vertical cylinder 141 and lifts and descends, but has a horizontal width corresponding to the distance between the first and second operation holes 134,
A first hinge-coupled one end to both sides of the operating table 143 and provided as the upper body 120 through the first and second operation holes 134, and hinge-coupled the other end to one side of the first and second cutting portions 170 ,Including 2 operating bars 144,
The first and second cutting portions 170 provided in the upper body 120,
A fixed shaft portion 173 that couples the driving pulley 151 of the first and second driving units 150 and the driving pulley 172 connected to the driving belt 171,
A connecting rod 174 having one end coupled to the fixed shaft portion 173 and having the other end toward the center of the mounting table 133 so as to be parallel to each of the first and second saw blade entry holes 131,
The first and second rotation by combining the driven pulley 176 connected to the driven pulley 172 and the driven belt 175, which is mounted on the other end of the connecting rod 174 and located on the upper side of the first and second operation holes 134 By including the operating shaft portion 177 that rotates the saw blade 191, it is possible to achieve the purpose of reducing energy and improving the durability and cutting quality of the device by simplifying and efficient operation structure.

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The present invention provides a rotary automatic cutting machine that automatically cuts a cut surface of a material used for a picture frame or furniture at an angle of 45 degrees symmetrical to each other on both sides.

Accordingly, the present invention has the advantage of automatically controlling the operation of both rotating saw blades at the same time, significantly improving workability and productivity compared to a conventional manual cutting machine, and excluding the possibility of a safety accident.

In particular, the present invention simplifies the operation structure of the rotary saw blade compared to the conventional vertical elevating automatic cutting machine to save energy, and prevents the vibration generated from the motor from being transmitted to the rotary saw blade, thereby preventing damage to the machine. It has the advantage of minimizing and improving the quality of the cut surface.

1 is a perspective view of an automatic rotary cutting machine according to the present invention.
Figure 2 is a front view of the automatic rotary cutting machine according to the present invention.
3 is a plan view of the automatic rotary cutting machine according to the present invention.
Figure 4 is an exploded perspective view of the automatic rotary cutting machine according to the present invention.
Figure 5 is a front view of the main part of Figure 4;
6 is a plan view showing another embodiment of the automatic rotary cutting machine according to the present invention.
7 to 8 is an exemplary operation state of the automatic rotary cutting machine according to the present invention.

Hereinafter, a configuration and operation according to a preferred embodiment of the automatic rotary cutting machine of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of parts that can be easily implemented by those of ordinary skill in the art may be omitted.

1 is a perspective view of a rotary automatic cutting machine according to the present invention, Fig. 2 is a front view of a rotary automatic cutting machine according to the present invention, Fig. 3 is a plan view of a rotary automatic cutting machine according to the present invention, and Fig. 4 is a rotary automatic cutting machine according to the present invention. Fig. 5 is an exploded perspective view, Fig. 5 is a front view of the main part of Fig. 4, Fig. 6 is a plan view showing another embodiment of the automatic rotary cutting machine according to the present invention, and Figs. 7 to 8 are exemplary operating states of the automatic rotary cutting machine according to the present invention It shows the degree. In order to make an effective city of the internal composition, some elements are marked transparently.

The rotating automatic cutting machine to which the technology of the present invention is applied is a cutting machine that automatically cuts the cut surfaces of both materials at a mutually symmetrical oblique angle using a rotating saw blade when forming a structure in which both materials such as frames or furniture are orthogonal to form corners. However, it should be noted that it relates to a rotary automatic cutting machine that saves energy and improves cutting quality by simplifying and more efficient operation structure.

For this purpose, the automatic rotary cutting machine of the present invention forms a tower-like appearance consisting of a lower body 110 and an upper body 120 as shown in FIG. 1, and the front of the upper body 120 is configured to shield the cover 121 And the specific internal configuration is as follows.

As schematically illustrated in FIGS. 2 to 3, the lower body 110 accommodates an operation part 140 to be described later, and first and second supply guides 112 are installed on the upper side thereof.

The first and second supply guides 112 are provided to supply the material horizontally from both left and right sides, and are provided by opening the material discharge hole 111 up and down in the center.

The material discharge hole 111 is formed so that the ends of both sides of the material cut by the first and second rotary saw blades 191 are discharged through the lower body 110, and a predetermined chute (not shown) is mounted.

The upper body 120 accommodates the table 130 at one side of the first and second supply guides 112 and includes first and second driving parts 150, which will be described later, and first and second cutting parts 170 and , It is provided to install the first and second rotary saw blades (191).

In the table 130, as shown in FIG. 4, first and second saw blade entry holes 131 formed in the left and right directions of 45 degrees centered on the material discharge hole 111, and the first and second saw blades An installation table 133 provided between the holes 131 and first and second operation holes 134 formed on both sides of the installation table 133 are provided through the lower body 110.

The first and second saw blade entry holes 131 are provided in a rectangular through-hole form capable of accommodating the diameter and thickness of the first and second rotary saw blades 191 and are mutually symmetrical from the material discharge hole 111 to the inside of the table 130 It is formed in a diagonal direction of 45 degrees so that

The mounting table 133 is provided to provide a support surface for installation of the operation unit 140 between the first and second saw blade entry holes 131. The mounting table 133 is provided to form a connection structure between the operation unit 140 accommodated in the lower body 110 and a series of components accommodated in the upper body 120.

The first and second operation holes 134 are provided on the upper side of the mounting table 130 and the first and second power generated by the operation unit 140 provided at the lower side of the mounting table 133. The first and second operation bars formed for transmission to the cutting unit 170 and connecting the operation table 143 of the operation unit 140 to be described later and the operation shaft unit 177 of the first and second cutting units 170 ( 144) is disposed through.

The operation unit 140 is mounted on the lower side of the installation table 133 and provided on the lower body 110 and consists of an installation bar 142, an operation table 143, and first and second operation bars 144 do.

The installation bar 142 is provided downward by coupling the upper end to the mounting table 133 and to mount the vertical cylinder 141. The installation bar 142 is provided in plural and arranged at regular intervals, and the height of the installation bar 142 is at a level corresponding to the operating range of the rod of the vertical cylinder 141 and the operating table 143 coupled to the top of the rod. To form a vertical cylinder 141 at the lower end thereof.

The working table 143 is coupled to the upper end of the rod of the vertical cylinder 141 and raised and lowered, but has a horizontal width corresponding to the interval between the first and second operation holes 134. The operating table 143 is a medium connecting the first and second operating bars 144 to a single rod so as to operate at the same height, and is provided by combining the lower center of the operating table 143 at the top of the rod, and the plurality of installation tables are provided. It is provided to couple the first and second operation bars 144 on both sides through (133).

The first and second operation bars 144 are provided as an upper body 120 through the first and second operation holes 134 by hinge-coupled one end to both sides of the operation table 143, and the first and second cutting portions 170 ) Is provided to hinge the other end to one side.

As shown in FIG. 5, the first and second operation bars 144 are connecting means for transmitting the lifting operation force of the vertical cylinder 141 to the first and second rotary saw blades 191. The first and second rotary saw blades 191 are mounted on the operating shaft portion 177 of the first and second cutting portions 170 to be described later, but are provided to rotate along the upper and lower arc-shaped trajectories from the fixed shaft portion 173 as a starting point. Therefore, the first and second operating bars 144 have one end coupled to the operating table 143 vertically elevating by the vertical cylinder 141 and the other end coupled to the operating shaft portion 177 of the first and second cutting portions 170. It is constructed by hinged bonding. The first and second operation bars 144 may be provided in the form of a single straight bar or a bending bar that bends the center at a predetermined angle, as necessary, so that a stable trajectory may be applied.

The first and second driving parts 150 are installed on the table 130 at both sides of the mounting table 133 and provided on the upper body 120. The first and second driving units 150 are provided with a predetermined motor to generate rotational power of the first and second rotary saw blades 191, and a driving pulley 151 is mounted at the shaft end.

The first and second cutting portions 170 are provided to be symmetrical to each other in parallel with each of the first and second saw blade entry holes 131 at one side of the first and second driving units 150, and the operation unit 140 and It is configured to interlock with the first and second driving units 150.

The first and second cutting portions 170 rotate the first and second rotary saw blades 191 by the first and second driving units 150 and the first and second rotary saw blades 191 by the operation unit 140 It is provided as a means for simultaneously transmitting the upper and lower rotational operating force, and comprises a fixed shaft portion 173, a connecting rod 174, and an operating shaft portion 177.

The fixed shaft part 173 is provided to couple the driving pulley 151 of the first and second driving parts 150 and the driving pulley 172 connected to the driving belt 171. The fixed shaft portion 173 forms a dual structure having an inner shaft serving as the rotational axis of the prime pulley 172 at its core, and an outer axis serving as the rotational axis of the connecting rod 174 on an outer concentric circle of the inner axis.

The connecting rod 174 is configured to couple one end to the fixed shaft portion 173 and have the other end toward the center of the mounting table 133 so as to be parallel to each of the first and second saw blade entry holes 131. The connecting rod 174 has one end mounted on one side of the outer shaft of the fixed shaft portion 173, and the operating shaft portion 177 is mounted on the other end, and the first and second rotating saw blades 191 are coupled to the operating shaft portion 177. The connecting rod 174 is provided in the shape of a predetermined plate, but the length between both ends is connected with the upper and lower arc-shaped trajectories of the first and second rotary saw blades 191, and the diameter and weight of the first and second rotary saw blades 191 are considered. To form its length and thickness.

The operating shaft part 177 is mounted on the other end of the connecting rod 174 and coupled to the driven pulley 176 connected to the driven pulley 172 and the driven belt 175 to rotate the first and second rotating saw blades 191 Equipped. The working shaft part 177 has a double structure having an inner shaft serving as the rotation axis of the driven pulley 176 at its core and an outer axis serving as the rotation axis of the first and second rotary saw blades 191 on an outer concentric circle of the inner axis. .

The operation shaft part 177 is interlocked with the operation part 140 and rotates along the upper and lower arc-shaped trajectories from the fixed shaft part 173 as a starting point to insert the first and second rotating saw blades 191 into the first and second saw blade entry holes. It is configured so that the operation of cutting the material while entering and exiting (131) is performed.

3 and 6, the driving pulley 151, the driving pulley 172, and the driven pulley 176 are the first and second driving parts 150, the fixed shaft part 173, and the working shaft part 177. The driving belt 171 and the driven belt 175 are provided at one or both ends of the shaft and are configured to be selectively disposed on the front and rear sides of the fixed shaft part 173 and the actuating shaft part 177. For example, the driving pulley 151, the driving pulley 172, and the driven pulley 176 are provided to face the front of the upper body 120 where the first and second rotating saw blades 191 are located, and the driving belt 171 ) And the driven belt 175 are arranged side by side, or the driving pulley 172 is provided at both shaft ends and the driving pulley 151 and the driven pulley 176 are directed to the front or rear of the upper body 120 It is possible to derive a configuration in which the driving belt 171 and the driven belt 175 are respectively arranged.

The first and second rotary saw blades 191 are mounted on each of the first and second cutting portions 170 to interlock and enter the first and second saw blade entry holes 131 to cut the cross section of both sides of the material by 45 degrees. .

The first and second rotary saw blades 191 are provided as disk-shaped saw blades and are coupled to a driven pulley 176 provided in the actuating shaft part 177 of the first and second cutting parts 170, and the first and second driving parts 150 It rotates by the power of The first and second rotary saw blades 191 are rotated along the upper and lower arc-shaped trajectories around the fixed shaft part 173 by the operation unit 140, and the first and second saw blade entry holes 131 formed in the table 130. ), and cutting the ends of the material on both sides by providing the first and second supply guides 112 and the material discharge holes 111 to be located in front and rear of the first and second rotating saw blades 191, Configured to discharge.

Looking at the operating state of the rotary automatic cutting machine to which the technology of the present invention is applied having the configuration as described above is as follows. Since the following description is for describing the present invention by way of example, it is natural that the present invention is not limited by the following examples, and that various modifications may be provided within the scope not departing from the scope of the present invention. .

The rotating automatic cutting machine of the present invention includes an operation part 140 mounted on the lower body 110 and the upper body 120, the first and second driving parts 150, the first and second cutting parts 170, and the first , It is configured to cut the ends of a pair of materials to be symmetrical to each other at a 45 degree angle by the two rotary saw blade 191.

Materials are supplied to the first and second supply guides 112 provided on the upper left and right sides of the lower body 110, respectively, so that the ends are positioned above the material discharge holes 111. When the cover 121 provided in front of the upper body 120 is closed, a predetermined material fixing means 122 mounted on the inside of the cover 121 presses the upper side of the material to fix the position.

When the materials on both sides are fixed as described above, the first and second driving units 150 are operated to rotate the driving pulley 151 provided at the shaft end. The driving pulley 172 coupled to the fixed shaft part 173 of the first and second cutting parts 170 installed on one side of the first and second driving parts 150, respectively, is attached to the driving pulley 151 and the driving belt 171. The driven pulley 176 coupled to the operating shaft 177 mounted with the fixed shaft 173 and the connecting rod 174 therebetween is connected by the prime pulley 172 and the driven belt 175 . Accordingly, power is transmitted to the first and second rotating saw blades 191 coupled to the operating shaft unit 177 by the first and second driving units 150 to rotate in one direction.

When the first and second rotary saw blades 191 rotate as described above, the vertical cylinder 141 of the operation unit 140 is actuated to lower the rod, as shown in FIG. 7, and a working table coupled to the upper end of the rod ( 143) descends at the same time. The first and second operating bars 144 hinge-coupled to both sides of the operating table 143 are hinge-coupled to the operating shaft portion 177 of the first and second cutting portions 170 at the other end, and the operating shaft portion 177 Is rotated downward along the arc-shaped trajectory from the fixed shaft part 173, and the first and second rotating saw blades 191 coupled to the operating shaft part 177 also rotate downward toward the first and second saw blade entry holes 131 at the same time. Thus, the ends of both materials are cut at the same time in the diagonal direction of 45 degrees. The cut cross section is discharged to the lower body 110 through the material discharge hole 111.

When the cutting operation is completed as described above, as shown in FIG. 8, the rod of the vertical cylinder 141 of the operation unit 140 is raised to raise the operating table 143 coupled to the upper end. The first and second operating bars 144 hinged to the operating table 143 and the operating shaft portion 177 rise, and the operating shaft portion 177 rotates upward along an arc-shaped trajectory from the fixed shaft portion 173 as a starting point. The first and second rotating saw blades 191 coupled to the operating shaft portion 177 rotate upward from the first and second saw blade entry holes 131 to wait until the material is supplied, and repeat the above-described process to perform the cutting operation. Perform.

The rotary automatic cutting machine according to the present invention as described above provides a rotary automatic cutting machine that automatically cuts the cut surfaces of both materials at the same time at a 45 degree angle symmetrical to each other at the junction, significantly improving workability, productivity, and safety compared to a conventional manual cutting machine. There is an advantage to improve. In particular, the present invention simplifies the operation structure of the rotary saw blade by differentiating the method of vertically lifting and lowering the rotary saw blade and the drive motor in a conventional automatic cutting machine, thereby reducing energy as well as vibration generated from the driving unit. It is expected to have a great potential for industrial use because it has various effects such as improving durability by preventing it from being transmitted to and maximizing the quality of the cut surface.

110: lower body 111: material discharge hole
112: first and second supply guide 120: upper body
121: cover 122: material fixing means
130: table 131: first and second saw blade entry holes
133: mounting table 134: first and second operating holes
140: operating part 141: vertical cylinder
142: mounting bar 143: operating table
144: first and second operating bars 150: first and second driving units
151: drive pulley 170: first and second cutting portions
171: Wondong belt 172: Wondong pulley
173: fixed shaft part 174: connecting rod
175: driven belt 176: driven pulley
177: working shaft part 191: first and second rotating saw blades

Claims (4)

To form a tower-shaped exterior divided into an upper body 120 having a lower body 110 and a front cover 121 incorporating the material fixing means 122,
The first and second saw blade entry holes 131 installed on the upper side of the lower body 110 and accommodated in the upper body 120 and formed in the left and right directions of 45 degrees centering on the material discharge hole 111 provided in the center. ), and the mounting base 133 provided between the first and second saw blade entry holes 131, and the first and second operating holes 134 formed on both sides of the mounting base 133 through the lower body 110 The table 130 provided by the,
An operation unit 140 provided on the lower body 110 by being mounted on the lower side of the mounting table 133,
First and second driving parts 150 installed on the table 130 at both sides of the mounting table 133 and provided on the upper body 120,
Separately provided at one side of the first and second driving parts 150, provided parallel to and symmetrical to each of the first and second saw blade entry holes 131, and the operation part 140 and the first and second driving parts The first and second cutting portions 170 interlocked with 150,
Rotation including first and second rotating saw blades 191 that are mounted on each of the first and second cutting parts 170 and interlocked with each other and enter the first and second saw blade entry holes 131 to cut the cross section of the material on both sides by 45 degrees. In the automatic cutting machine,
The operation unit 140 provided in the lower body 110,
An installation bar 142 which is provided downward by coupling the upper end to the installation table 133 and mounts the vertical cylinder 141,
An operation table 143 that is coupled to the upper end of the rod of the vertical cylinder 141 and lifts and descends, but has a horizontal width corresponding to the distance between the first and second operation holes 134,
A first hinge-coupled one end to both sides of the operating table 143 and provided as the upper body 120 through the first and second operation holes 134, and hinge-coupled the other end to one side of the first and second cutting portions 170 ,Including 2 operating bars 144,
The first and second cutting portions 170 provided in the upper body 120,
A fixed shaft portion 173 that couples the driving pulley 151 of the first and second driving units 150 and the driving pulley 172 connected to the driving belt 171,
A connecting rod 174 having one end coupled to the fixed shaft portion 173 and having the other end toward the center of the mounting table 133 so as to be parallel to each of the first and second saw blade entry holes 131,
The first and second rotation by combining the driven pulley 176 connected to the driven pulley 172 and the driven belt 175, which is mounted on the other end of the connecting rod 174 and located on the upper side of the first and second operation holes 134 It includes a working shaft portion 177 for rotating the saw blade 191,
The operation shaft portion 177 is coupled with the first and second operation bars 144 and rotates along an upper and lower arc-shaped trajectory from the fixed shaft portion 173 as a starting point, and the first and second rotary saw blades 191 are first, Automatic rotary cutting machine, characterized in that configured to enter the two saw blade entry hole (131). delete delete The method of claim 1,
The driving pulley 151, the driving pulley 172, and the driven pulley 176 are provided at one or both shaft ends of the first and second driving parts 150, the fixed shaft part 173, and the working shaft part 177, and The belt 171 and the driven belt 175 are configured to be selectively arranged on the front and rear sides of the fixed shaft 173 and the actuating shaft 177.

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