JPH11240695A - Band material reciprocating structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized, low-cost and easy-to-use band-material-drive reciprocating device that reciprocates its band material preferably by joining adjacent regulation members projecting from one side of a band part to each other against any lateral inflection. SOLUTION: A band-material-drive reciprocating device 1 is adapted to reciprocate a band material 2 by engaging a screw 3 designed to be rotated clockwise and counterclockwise with a threaded portion 22 made in the inner- side middle of regulation members 21 in the reciprocation direction so that adjacent regulation members 21, which project from one side of a band part 20, to each other against any lateral inflection. The screw 3 includes in its threaded portion a threaded part for driving and a threaded part for guiding of a smaller diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating device for reciprocating a belt having a regulating member.

[0002]

2. Description of the Related Art Conventionally, a reciprocating device for moving a member such as a lift device or the like, a switch or other actuators, etc., into or out of operation, comprises a hydraulic cylinder, a pneumatic cylinder, and an operation valve thereof. A hydraulic or pneumatic structure or a screw or link mechanism having a drive mechanism such as a drive motor is frequently used. However, since the reciprocating operation device having the above-described structure is complicated and large in size and high in cost, in order to avoid this drawback, the applicant has proposed a reciprocating operation using a chain-like band as disclosed in Japanese Patent Application Laid-Open No. Hei 8-169693. The device was proposed.

[0003]

The forward / backward operating device as disclosed in the above publication can be reduced in size with respect to the operating stroke for moving the operated member forward / backward, and can be made simple and inexpensive. Although there is an advantage, since a driving wheel such as a sprocket is used as an operating structure of the band, a structure for stopping the driving wheel at an arbitrary position at the time of reciprocating operation is required, and a driving wheel is installed and a shaft supporting structure is performed. In addition, further improvement is desired in terms of a miniaturized structure, device weight and manufacturing cost.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the moving structure of the band according to the present invention comprises, first, an adjacent regulating member 21 protruding from one side of the band 20. Are joined to each other to prevent refraction to the side and to advance / retract the band 2.
While forming the screw part 22 in the forward and backward directions in the inner central part of 1,
The belt 2 is moved forward and backward by engaging the screw 3 driven to rotate forward and backward with the screw 22.

[0005] Second, a driving screw part 31 and a guide screw part 32 smaller than the driving screw part 31 are formed on the screw part 30 of the screw body 3.

A third feature is that the screw body 3 is meshed in the feeding portion 50 to which the belt body 2 is joined.

Fourth, the belt 2 is operated to be extended while the regulating member 21 is pushed out by the guide member 7 provided at the base of the extension 50.

Fifth, a screw 2 is provided in the center of the regulating member 21.
2, and a cutout groove 23 communicating with the screw portion 22 is formed on the end of the regulating member 21.

Sixth, the shaft portion 3a of the screw body 3 is connected to the feeding portion 50.
And the screw body 3 is driven via a speed reduction mechanism 9 from a drive motor M provided adjacent to the screw body 3 in parallel with the screw body 3.

[0010] Seventh, a space H is formed on the base side of the adjacent regulating member 21 protruding from the band 20, and the regulating member 21 and the band 20 are integrally formed of a synthetic resin material. It is characterized by becoming.

[0011]

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 shown in FIGS. 1 and 2 is an advance / retreat operating device having an endless belt advance / retreat operation structure according to the present invention,
The advancing / retreating device 1 advances and retreats a band 2, which will be described later, having a plurality of regulating members 21 protruding from one side of a band 20, and meshes with a screw portion 22 formed on the band 2. It comprises a screw body 3 as a feeding mechanism to be operated, a driving motor M as a driving device for driving the screw body 3 from below through a shaft portion 3a so as to be capable of normal and reverse rotation, a feeding section 50 and a storage section 51. It consists of a box-shaped case 5 that also serves as the body frame,
In the illustrated example, the band 5, the screw 3, and the drive motor M are integrally housed in the case 5 so as to be compact and handleable.

The structure of the band 2 will be described with reference to FIGS. 2 to 4. The band 2 has a flat belt-shaped cross section 20 formed continuously from the start end to the end and a side surface thereof. A plurality of regulating members 21 are integrally protruded so that adjacent regulating members 21 can be joined and separated. The restricting member 21 in the illustrated example includes a screw portion 22 which can be engaged with a screw portion 30 of the screw body 3 described later, at the center of a piece shaped like a rectangle in a sectional view (front view), and the screw portion. A notch groove 23 extending from 22 to the front end of the regulating member 21 is cut out. The notch groove 23 prevents the contact of the screw body 3 with the shaft portion 3a when the band 2 moves forward and backward, and the screw part 22 is removed. An effective screw portion is formed as large as possible in the central portion of the regulating member 21 so that the belt 2 can be accurately driven forward and backward.

The thickness of the regulating member 21 is such that the band 2 can be smoothly bent at the time of the reciprocating operation, and at the same time, prevents the band 2 from refracting to one side to withstand a sufficient operating load. In addition, it is appropriately set according to the structure and function of the advance / retreat operating device 1 corresponding to each application. The band 2 in the illustrated example is made of a plastic material having abrasion resistance, flexibility and sufficient rigidity so as to be mass-produced at low cost.

That is, as shown in FIG. 3, the band 2 is a joint between the surface base of the regulating member 21 and the band 20, and has a smooth peripheral surface between the adjacent regulating members 21 and the band 20. By forming the space portion H, the molding process using a plastic material can be easily performed, and at the same time, the band portion 20 at the base portion between the regulating members 21 that are closely joined by the space portion H is formed. The flexibility is enhanced without difficulty, so that the bending of the feeding trajectory at the time of the reciprocating operation of the band 2 can be smoothly performed. Also, when foreign matter such as dust enters between the regulating members 21, The escape is preferably performed in the space H so that the joining of the regulating members 21 is not hindered.

Next, the screw body 3 will be described with reference to FIGS. The screw body 3 is attached to a bearing portion 6 provided below the feeding portion 50 by a shaft portion 3 which is vertically supported along the feeding direction.
A screw portion 30 is provided at the upper end of the belt member 2. The screw portion 30 has a configuration in which a driving screw portion 31 and an induction screw portion 32 described later are continuously formed above and below the driving screw portion 31. The screw portions 22 are accurately meshed with each other while being smoothly meshed with each other, so that the belt 2 can be favorably advanced and retracted.

Since the shaft portion 3a of the screw body 3 is formed to have a smaller diameter than the screw portion 30, the notch groove 23 of the regulating member 21 passes quickly without contact when the band 2 moves forward and backward. However, the movement of the regulating member 21 is not hindered. Then, meshing with the screw portion 30 is enabled at the innermost part of the regulating member 21, so that the screw body 3 appropriately moves the band 2 forward and backward, and the meshing transmission performed in the feeding portion 50 is performed downward. To be able to do well.

The drive screw portion 31 of the screw portion 30 has a pitch and a shape (trapezoidal shape) meshed with the screw portion 22 of the regulating member 21 in a normal driving appropriate screwing state, and is formed in a predetermined range for several pitches. . In addition, the guide screw part 32 is
While maintaining a constant pitch from both ends to the other end, small-sized small screws having a mountain shape whose height and shape are sequentially reduced are formed for several pitches. Thereby, when the screw body 3 rotates forward and advances the band 2 in the storage section 51 toward the feeding section 50 side and feeds out, the tip of the small screw of the guide screw section 32 is restricted to the regulating member 21.
The screw member 3 can be sequentially and appropriately engaged smoothly in the groove of the screw portion 22 while being deeply meshed with the drive screw portion 31 so that the screw member 3 can sequentially and appropriately raise the regulating member 21 at the initial stage of joining. Thus, the belt 2 can be satisfactorily moved upward while being pulled out of the storage section 51 without difficulty.

When the screw body 3 is rotated in the reverse direction to retract the unwound belt 2, the guide screw part 32 above the drive screw part 31 is screwed into the screw part 22 in the same manner as described above, and the drive screw part 32 is screwed. Since the guide is guided to the portion 31 and screwed properly, the belt 2 can be properly retreated, and the storage from the feeding portion 50 to the storage portion 51 can be satisfactorily performed.

The bearing portion 6 is formed by supporting a protruding piece 33 projecting in the middle of the shaft portion 3a between upper and lower metal (bearing or the like) 60 provided on the case 5 above the driving motor M so as to be sandwiched. The screw body 3 is rotated in the straight position within the feeding portion 50, and the load in the vertical direction generated when the belt body 2 moves forward and backward is well received, and the load is directly applied to the drive motor M. I try to prevent that.

On the back of the band 2 and below the screw 3,
A guide member 7 is provided for guiding the band 2 from the back and pushing the band 2 so that the regulating member 21 and the screw body 3 are properly engaged with each other when the band 2 moves. In FIG. 2, the guide member 7 supports the roller that rolls along the width of the band portion 20 at the lower portion of the feeding portion 50 so as to slightly protrude in the movement locus thereof, so that the band member 2 is screwed. 3, the guide member 7 moves through the belt 20 through the next regulating member 21 that is extended in an expanded state on the curved trajectory (extended trajectory) from the storage section 51 to the extending section 50. The regulating member 21 extruded by this is quickly and closely joined to the regulating member 21 at the front position, thereby smoothly engaging the regulating member 21 and the screw body 3 to be extended. That is what you can do. Note that the guide member 7 is not limited to the above, and may be a sliding piece that slides on the band portion 20.

As shown in FIG. 2, the forward / backward operation device 1 according to the present invention, which is constructed as described above, rotates the drive motor M in the forward / reverse rotation so that the band 2 is stored in the storage portion 51 in a dotted line. In this state, the operation member 2a of the belt 2 can move the appropriate actuated member 8 precisely in a reciprocating operation or a single operation. That is, in the storage posture, the belt 2 is in a state where the screw 3 is engaged with the screw 22 of the regulating member 21 in the feeding portion 50.
In the feeding portion 50, the lateral displacement is regulated and guided, and the other end portion corresponding to the advance / retreat stroke of the band 2 is accommodated in the accommodating portion 51. The height of the apparatus can be made extremely low as compared with the height of the operation of the band 2, thereby achieving a compact configuration and state.

The belt 2 is driven by a driving motor M
When the forward rotation is performed by the forward rotation operation, the drive screw portion 31 appropriately meshed with the screw portion 22 of the regulating member 21 sequentially advances the regulating member 21 so that the belt 2 is extended from the storage portion 51. The regulating member 21 is joined in the feeding portion 50, and a straight operating portion 2 a having rigidity, which is prevented from being refracted to one side by the joining of the regulating member 21, is formed above the feeding portion 50. Therefore, the straight operating portion 2a has its upper end, which means that the screw body 3 is stably and well supported by the bearing portion 6 of the shaft portion 3a. Load of each regulating member 21
When the drive motor M is stopped at any time, the drive motor M is prevented from reversing through screwing engagement between the screw portion 22 and the drive screw portion 31 to stop the drive motor M in place at an arbitrary position. Can be performed accurately.

Next, the belt 2 drives the screw 3 to the drive motor M.
When the reverse rotation operation is performed, the driving screw portion 31 that is properly meshed with the screw portion 22 sequentially moves down the regulating member 21 so as to retreat the band 2 while shortening the operating portion 2a and store the storage portion 51. Housed inside. Therefore, the rigid and straight operating portion 2 a can retreat while receiving the load or retreat resistance by the operated member 8 stably by joining the regulating members 21.

In the reciprocating operation of the band 2, the screw body 3 meshing with the screw portion 22 formed in the reciprocating direction at the center of the regulating member 21 has a height and a shape above and below the driving screw portion 31. By continuously forming the guide screw portion 32 of the small screw which becomes smaller sequentially, the screw body 3 rotates forward and the storage portion 51 is formed.
When the inner belt 2 is moved toward the feeding portion 50 side, the tips of the small screws of the guide screw portion 32 are sequentially and deeply engaged with the grooves of the screw portion 22 of the regulating member 21 in a flexible manner. Since the guide is guided to reach the portion 31, the screw body 3 can sequentially and appropriately raise the regulating member 21, and the band 2
Can be smoothly and reliably moved upward while being fed out of the storage section 51.

At this time, the adjacent regulating members 21 are
The feeding member is fed in a state of being expanded along a feeding locus extending from 1 to the feeding portion 50. However, since these restricting members 21 are slightly pushed forward by the guide member 7 via the band portion 20 below the feeding portion 50, they are pushed out. The adjusted restricting member 21 is quickly and closely joined to the preceding restricting member 21, and each of the screw portions 22 can form a straight appropriate screw continuously and satisfactorily. In this way, the belt 2 can also smoothly move forward and backward, and at the same time, can prevent the abrasion caused by the unreasonable engagement of the screw portion 22 and the screw body 3 to significantly improve the durability. Can be improved. At this time, the band 2 is such that the space H formed between the adjacent regulating members 21 and the band 20 smoothly bends in the extension trajectory of the band 20, and the intrusion of foreign matters is suppressed in the space. Since it is possible to escape with H, the reciprocating operation is performed smoothly, and the durability is improved by the good flexibility.

The belt 2 is made of synthetic resin such that a plurality of regulating members 21 are joined to and separated from one side of a belt 20 having a flat belt-like cross section continuous from the start end to the end. Since the screw member 22 formed in the center of the regulating member 21 and the cutout groove 23 extending to the front end thereof are cut out, the regulating member 21 is formed integrally with the material. , The shaft portion 3a having a smaller diameter than the screw portion 30 allows the band member 2 to pass through the notch groove 23 without contact when the band member 2 advances and retreats, and also allows the screw portion 30 to reach the restricting member 21 as much as possible. By meshing in the central part of the target, the advance and retreat operation of the band 2 by the screw body 3 can be performed well.

Further, since the reciprocating device 1 is configured as described above and can reciprocate the band 2, the device is large in size like a reciprocating device using a hydraulic or pneumatic structure using a conventional cylinder and piston. There is an advantage that it can be manufactured in a compact type that is inexpensive and easy to handle without making the band, and that noise and vibration can be suppressed when the band 2 moves forward and backward.

Next, another embodiment of the advance / retreat operating device shown in FIG. 5 will be described. The description of the same configuration as that of the above embodiment is omitted. This reciprocating device 1
Is configured such that when the band 2 is housed in the case 5 while being engaged with the screw body 3 and is moved forward and backward, the operating portion 2a of the band 2 is formed in a curved shape. That is, as shown in FIG. 2B, the band 2 has a regulating member 21 projecting from the band 20 in the same manner as described above, and is formed in a trapezoidal shape in which the tip side converges in a side view. A screw portion 22 and a cutout groove 23 similar to those of the above-described embodiment are formed in this regulating member 21.

In the reciprocating device 1 having the above-described structure, when the screw body 3 rotates forward and the band 2 moves forward, the unrolled band 2 is formed such that each of the regulating members 21 has a thin end portion. By joining the front sides to each other, the band 2 is fed out while properly forming the operating portion 2a curved forward, and when the screw body 3 is reversed, the band 2 is retreated in the same manner as described above. And can be smoothly stored in the storage section 51. According to this, the leading end of the band 2 moves forward and backward in the upward and forward combined directions while drawing a curved trajectory, so that the actuated member 8 is moved forward and backward in the combined direction by a conventional complicated link mechanism, a plurality of cylinder mechanisms, and the like. There is an advantage that the forward / backward operating device 1 for operating in the combined direction can be provided with a simple, inexpensive, and compact configuration without increasing the size and complexity of the operating device.

Therefore, when the actuated member 8 is a switch for operating the working device, the reciprocating device 1 performs a remote operation without being hindered by circumventing an intermediate object. It can be easily installed in a door of an automobile and its window (window glass) can be easily moved up and down with an appropriate trajectory. In the case where the reciprocating device 1 is provided inside the door, the case 5 can also be used by using the cover frame of the door. it can.

Further, as shown in FIG.
It is preferable to form a mating portion composed of a protrusion 21a and a recess 21b which are fitted and meshed in an uneven manner at the leading end portion of the adjacent joining surface of each regulating member 21. It is possible to prevent the displacement of the adjacent regulating member 21 and the like, to form the operating portion 2a having higher rigidity, and to improve the vibration resistance and the durability.

Next, another embodiment of the advance / retreat operating device shown in FIG. 6 will be described. The description of the same configuration as that of the above embodiment is omitted. This reciprocating device 1
Drives the screw body 3 for driving the band 2 from the lower side of the feeding portion 50 via the shaft portion 3a, and the screw body 3 is provided outside the feeding portion 50 in parallel with the shaft portion 3a. Motor M
By driving through the deceleration mechanism 9, the height of the advance / retreat operating device 1 is reduced by the amount corresponding to the drive motor M, so that the device can be made compact and the handleability can be improved. is there.

That is, the advance / retreat operating device 1 in the illustrated example includes:
The lower end of the shaft 3 a of the screw body 3 is supported by the bearing 6, and the reduction mechanism 9 is inserted into a space formed between the bearing 6 and the arc-shaped feeding locus of the regulating member 21, and 3
a is inserted into the speed reduction mechanism 9 so as to be driven, and the drive motor M is integrated on the other side of the speed reduction mechanism 9 such that its axis is parallel to the screw body 3 in the same direction. It is configured by fixed in place. Therefore, according to the above configuration, the speed reduction mechanism 9 is provided in the space formed by the extension trajectory of the band 2.
And the screw body 3 is transmitted from the side, so that the apparatus can be downsized and the band 2
Can be favorably performed.

Next, another embodiment of the forward / backward operating device shown in FIG. 7 will be described. The description of the same configuration as that of the above embodiment is omitted. This reciprocating device 1
In a state where the paired strips 2 of the same shape are arranged substantially symmetrically on the left and right centering on the screw body 3, the leading ends (starting end sides) of both strips 2 are connected by a connecting member (operated member) 8. Connected and extended section 50
And the other end is stored in the storage portion 51 so as to be able to be extended.

The screw body 3 is formed in the same manner as that of the above-described embodiment, and is equally engaged with a screw portion 22 formed on each of the regulating members 21 of the two band bodies 2. By simultaneously moving the two band members 2 forward and backward, a highly rigid operating portion 2a adapted to a large load is smoothly formed. In other words, the two band members 2 are formed as two columnar members to extend and form the more rigid operating portion 2a, and the restricting member 21 prevents the refraction in one direction from each other, and at the same time, the lateral side portions are formed. The bending of the restricting member 21 is prevented by the wide joining of the restricting member 21, so that the band body rigidity at the time of extension can be satisfactorily created.

In the above-described embodiment, the band 2 has the band 20 and the regulating member 21 integrally formed of a plastic material. However, the structure of the band 2 is not limited to the illustrated example. May be formed as a chain, and the regulating member 21 may be formed of a block body separately provided on a link plate of the chain.

Next, with reference to FIGS. 8 and 9, an example of a usage mode in which the reciprocating device 1 according to the present invention is used for a desk (table) 10 to raise and lower a desk plate (desk top plate) 11 will be described. explain. The desk 10 is placed on an underframe 13 having an appropriate number of supporting legs 12 by providing a desk plate 11 corresponding to the actuated member 8 by the reciprocating device 1 so as to be able to move up and down. The height of the OA devices W such as a personal computer and a word processor can be easily adjusted while sitting in a chair, and by raising the OA devices W high as shown by the dotted line in FIG. A new work desk has been devised that enables the use operation and enables the OA equipment W to easily perform work without exerting a constant posture on the body even when working for a long time. . The desk 10 is not limited to OA equipment, and may be another work desk.

For this reason, in the desk 10 shown in the figure, the reciprocating device 1 is installed in the front-rear direction, the horizontal direction, and the diagonal direction in the support portion 15 projecting below the underframe 13, and the band 2 is placed on the desk. By joining with the center of the plate 11, the height of the desk 10 is not increased, and the thickness of the desk plate 11 and the underframe 13 is made as thin as possible, so that the band 2 can be moved forward and backward. , The desk plate 11 can be lifted and lowered satisfactorily to improve the convenience of the desk 10 and to make it simple and inexpensive. Further, a pantograph type lifting assist structure 16 having a conventional configuration is provided between both sides of the underframe 13 and the desk 10 so that the desk plate 11 can be smoothly moved by the forward and backward operation of the band 2 of the forward and backward operating device 1. It is designed to assist lifting. In addition, the desk 10 may be provided with a guide column 17 on the desk plate 11 side, and the column 17 may be slidably inserted into the support leg 12. In this case, the vertical rigidity of the desk plate 11 is further improved. be able to.

[0039]

As described above, the present invention has the following advantages. According to the first aspect of the present invention, the screw body is sequentially meshed and rotated with the screw portion of the regulating member by the forward / reverse rotation of the drive motor, so that the band body is accurately formed while forming a rigid operating portion that prevents refraction to one side. When the drive motor is stopped at any time, the belt is prevented from reversing through the engagement between the screw portion of the regulating member and the screw body to stably move the belt body to an arbitrary position. Stops can be made. In addition, by providing a screw member driven in the forward and reverse rotations with a screw portion formed in the reciprocating direction at the inner central portion of each regulating member, a compact and easy-to-handle inexpensive reciprocating device is provided without increasing the size. be able to.

According to the second aspect of the present invention, at least a smaller guide screw portion is formed in the drive screw portion of the screw body for several pitches, so that when the screw member is rotated and the band is fed, the guide screw portion is small. Since the tip of the screw meshes deeply with the screw portion of the regulating member in a threaded manner and guides it to the drive screw portion sequentially, the regulating member in the initial stage of joining with the screw body is advanced appropriately and smoothly. The belt body can be smoothly and smoothly fed out, and the both can be meshed well to improve the durability.

According to the third aspect of the present invention, the screw member is meshed with the regulating member in the feeding portion with respect to the band in the stable state in which the regulating member is joined and the sideward movement is prevented by the feeding portion. In addition, the meshing of both can be performed accurately, and the displacement of the regulating member due to the meshing reaction force can be prevented, so that the belt body can be favorably advanced and retracted.

According to the fourth aspect of the present invention, when the belt is fed, the guide member provided at the base of the feed portion pushes out the restricting member and quickly joins the restricting member to the preceding restricting member. The meshing between the screw portion and the screw body can be performed smoothly, and the belt can be favorably moved.

According to the fifth aspect of the present invention, by forming a screw portion formed in the central portion of the regulating member and a cutout groove extending from the screw portion to the end portion, the effective screw portion of the regulating member can be formed as much as possible. In this case, the belt can be driven forward and backward accurately, and the contact between the shaft of the screw body and the regulating member can be prevented, so that the belt can be smoothly advanced and retracted. This can also provide a durable retraction device that can withstand heavy loads.

According to the sixth aspect of the present invention, the shaft portion of the screw body is supported on the lower side of the feeding portion, and the screw body is driven via a speed reduction mechanism from a drive motor disposed in parallel with the screw body. This can provide a retractable operating device having a reduced height and excellent compactness and handleability. In addition, the speed reduction mechanism of the drive motor can be installed in a space formed between the bearing portion and the arc-shaped feeding locus of the regulating member to drive the screw body, and the device can be downsized and the belt can be reduced. The body can be favorably moved forward and backward.

According to the invention of claim 7, a space is formed on the base side of the adjacent regulating member protruding from the band, and the regulating member and the band are integrally formed of a synthetic resin material. Accordingly, the band can be smoothly bent by the space portion when the band moves forward and backward, and the molding process using a plastic material can be easily performed. In addition, when dust or the like enters between the regulating members, the dust can escape in the space and the band can be favorably moved forward and backward.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an advance / retreat operating device of the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a side sectional view showing a configuration of a band and a screw body.

FIG. 4 is a plan sectional view showing a main part of FIG. 3;

FIG. 5A is a perspective view of an advance / retreat operating device according to another embodiment. (B) is a sectional side view showing the configuration of the band and the screw body of (A).

FIG. 6 is a side sectional view of another embodiment of the advance / retreat operating device of the present invention.

FIG. 7 is a side sectional view of another embodiment of the advance / retreat operating device of the present invention.

FIG. 8 is a front sectional view showing a mode of use of the advance / retreat operating device of the present invention for a desk.

FIG. 9 is a plan sectional view showing a configuration of a main part of FIG. 8;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 advance / retreat operating device 2 band 3 screw 3a shaft 5 case 6 bearing 7 guide member 8 actuated member 9 reduction mechanism 20 band 21 regulating member 22 screw 23 cutout groove 30 screw 31 drive screw 32 guide screw Part H Space part

Claims (7)

[Claims] 1. An adjacent regulating member (21) protruding from one side of a band (20) is joined to each other to prevent lateral refraction and to move the band (2) forward and backward. In the reciprocating operation device, a screw portion (22) is formed in the central portion of the regulating member (21) in the reciprocating direction, and the screw portion (2) is formed.
An advancing / retracting operation structure of the band body for moving the band body (2) forward and backward by engaging a screw body (3) driven to be able to rotate forward and backward with 2). 2. The structure of claim 1, wherein a driving screw part (31) and a smaller guiding screw part (32) are formed on the screw part (30) of the screw body (3). 3. The structure of claim 1 or 2, wherein the screw body (3) is engaged in the feeding portion (50) to which the band (2) is joined. 4. The strip according to claim 1, 2 or 3, wherein the strip (2) is extended while the regulating member (21) is pushed out by a guide member (7) provided at the base of the extension (50). Retractable operation structure. 5. A screw portion (2) in a central portion of the regulating member (21).
The band member according to claim 1, wherein 2) is formed, and a cutout groove (23) communicating with the screw portion (22) is formed on an end side of the regulating member (21). Retractable operation structure. 6. The screw body (3) has a shaft portion (3a) supported by the lower side of the feeding portion (50), and the screw body (3) is provided in parallel with the screw body (3). The belt moving structure according to claim 1, 2, 3, 4, or 5, which is driven from a drive motor (M) via a speed reduction mechanism (9). 7. A space (H) is formed on the base side of an adjacent regulating member (21) projecting from the band (20),
7. The structure of claim 1 or 2 or 3 or 4 or 5 or 6, wherein the regulating member (21) and the band (20) are integrally formed of a synthetic resin material.