JP2019060133A - Shutter winding and unwinding device - Google Patents

Abstract

To provide a long-life shutter winding and unwinding device that further prolongs durable years of a shaft serving as a central axis for winding and unwinding a shutter.SOLUTION: A shutter winding and unwinding device 1 comprises: two pulleys fitted to a shaft, disposed separately from each other and provided rotatably with respect to the shaft; a link bar 5 having an inner cylinder 5a and an outer cylinder 5b, bridged between the two pulleys and formed so as to extend and contract in a longitudinal direction; a grease cap fitted to an end part 5c of both ends of the link bar; and a pump structure 7 for pushing out air. The pump structure includes: a disk-like member 5ba fixed inside the outer cylinder 5b for cutting off an interior of the outer cylinder in the longitudinal direction, and having a through-hole 5baa at a central axis of the link bar; a piston 5ad for sliding the interior of the outer cylinder in the longitudinal direction; and a connection member 5ac for connecting the piston with an end part of the inner cylinder. Grease is pushed out from the grease cap by extension and contraction of the link bar, and grease d is dripped on a shaft 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shutter winding and feeding device which extends the service life of a shaft which is a central shaft of winding and drawing of a shutter, and more particularly to a shutter winding and feeding device provided with a fueling link rod.

The background art will be described below. FIG. 5 is an explanatory view regarding sliding of a pulley according to a shutter winding and feeding device showing a conventional embodiment, wherein (a) is an enlarged detail view corresponding to a D portion shown in (b) of FIG. (B) is explanatory drawing which shows a mode that the pulley shown to (a) slid, and (c) is explanatory drawing which shows a part of link bar.
As shown in (a) and (b) of FIG. 5, when the shutter 102 is either wound up or unwound, the shutter 102 is fitted on a shaft 103 which is a central axis for winding and unwinding. The pulleys 104, 104 at both ends of the shaft 103 rotatably provided with respect to the shaft 103 and the two pulleys 104, 104 so as to follow and synchronize the rotation of these pulleys 104, 104 with each other The link rod 105 and the stopper 106 fixed to the shaft 103 so as to prevent the pulleys 104 and 104 from sliding in the axial direction of the shaft 103 and the shaft 106 fixed so as to block the movement of the stopper 106 1 between the one stopper 106 and the one pulley 104 And a pulley sliding region 103a provided on the third peripheral surface.

  Furthermore, a compression coil type spring 107 is inserted in the shaft 103 so as to be able to expand and contract. One end of the spring 107 is fixed to the shaft 103, and the other end is in contact with the end of the pulley 104. A spring as a damper 108 is inserted through the pulley 104 on the opposite side of the spring 107 side. One of the dampers 108 is in contact with the pulley 104 and the other is in contact with the stopper 106. That is, the damper 108 is biased to maintain the distance between the pulley 104 and the stopper 106. As a result, when the spring 107 is extended and the pulley 104 slides toward the damper 108, the damper 108 works to push it back.

  A locking plate 113 is attached to the pulley 104. The locking plate 113 is fixed along the outer periphery so as to cover approximately a quarter of the outer periphery of the pulley 104, fixed at one end by a bolt and provided with a hook at the other end to suspend the slat 102a. It is lowered. Thereby, the locking plate 113 rotates forward and reverse together with the pulley 104 in synchronization with the winding and unwinding of the shutter. In addition, a grease cup 114 is provided on the side of the spring 107 of the pulley 104. An appropriate amount of lubricating grease 114 a is filled in the grease cup 114 to lubricate the rotating portion of the pulley 104 and the shaft 103.

  Further, as shown in FIG. 5C, the link rod 105 includes an inner cylinder 105a and an outer cylinder 105b which can slide relative to each other, and is formed so as to be extensible and contractible in the longitudinal direction. Further, the inner cylinder 105a and the outer cylinder 105b form a slide mechanism that slides on each other. A grease injection hole 105c is provided in the outer cylinder 105b. Grease is appropriately injected from the grease injection port 105c and stored in the link rod 105. The grease is dropped on the shaft 103 by the sliding movement of the inner cylinder 105a and the outer cylinder 105b of the link rod 105, for a while The oil film can be kept on the shaft 103.

  The pulley 104 is rotatably inserted into the shaft 103. The central axial hole 104 b is a mounting hole of the pulley 104. A locking plate 113 is fixed to the pulley 104 on the circumferential surface of the pulley 104. One end of the locking plate 113 is fixed by a bolt, and a slat 102a is provided. When the shutter is taken up or operated, the pulley 104 is rotated accordingly. Two pulleys 104 are provided at both ends of the shaft 103, and link rod support holes 104a and 104a are provided in these pulleys 104 and 104, respectively. The link rods 105 are bridged in the link rod support holes 104a and 104a to follow and synchronize the rotational operations with each other.

  Before a load is applied to the pulley 104, the elastic force of the spring 107 and the damper 108 is in a state of natural length on the left and right of the pulley 104. Conventionally, when the slat 102a pivots in the winding direction or the unwinding direction, the pulley 104 is conventionally prevented from sliding on the shaft 103 because the stopper 106 restricts the axial movement of the shaft. The reference numeral 103 may be repeatedly damaged by the pulley 104, resulting in breakage. However, by providing the pulley sliding region 103a, the pulley 104 can move in the left direction in the figure, that is, in the arrow direction, and the same portion of the shaft 103 slides without being worn, and lubricating grease also In order to effectively form an oil film, the shaft 103 did not break down (see Patent Document 1).

JP 2014-132138 A

Conventionally, when the shutter is opened and closed, a shaft that is a shutter shaft may break due to sliding wear. Replacement work is easy if the shutter case is stored, but it is often expensive when stored in the store or on the ceiling. Parts cost (one set of shafts), etc., woodworking, cross, mortar, electrical work, etc. There will also be construction work that will be an obstacle for replacement. Until now, it has been very difficult for general users to oil the shutter winding shaft. However, according to current experience, a drastic improvement over rotational sliding wear is often seen with only a single drop of grease applied to the pulleys of the winding section. The reason is that wear and deterioration of the spring and the rotating part inevitably occur if it is used on a daily basis for one to three years and five to ten years after installation. I always felt how smoothly I could move up and down by pouring oil into this part every three years.
However, because this part was hidden in the case or the ceiling and was not visible, it seems that you do not think about the cost until you remove the case and break the ceiling. Most of them could not be a fundamental solution just by pouring oil only in places that were noticeable such as rails and pillars.
In addition, if the spring that is greatly curved is further forcedly wound due to the secular change including rust and the like, the movement itself is awkward and the life of the shutter winding and feeding device is significantly shortened.
The present invention solves the above-mentioned problems and is a further development of the long-life shutter previously filed, and in the shutter winding and feeding device, the service life of a shaft which is a central shaft for winding and feeding the shutter It is an object of the present invention to provide a long-life shutter winding and feeding device that extends the

  The shutter winding and feeding apparatus 1 and 21 of the invention according to claim 1 is fitted to a shaft 3 which is a central shaft for winding and feeding the shutter 2 when either the winding or the unwinding of the shutter 2 is performed. In order to follow and synchronize the rotation of at least two pulleys 4, 4 worn and spaced from one another and rotatably mounted relative to said shaft 3 and at least two of said pulleys 4, 4 In the shutter winding and feeding device 1, 21 provided with at least one link rod 5, 15 bridged between at least two of the pulleys 4, 4, the link rods 5, 15 slide against each other The link rods 5 and 15 are each provided with an inner cylinder 5a and an outer cylinder 5b and 15b, and are extendable and contractible in the longitudinal direction of the link rods 5 and 15, respectively. Grease caps 5f, 5g, 15f, 15g fitted to the ends 5c, 5c, 15c, 15c at both ends of the hook bars 5, 15, and the link bars when the link bars 5, 15 expand and contract in the longitudinal direction 5 and 15 are provided with pump structures 7 and 17 for pushing out the air inside, and by expanding and contracting the link rods 5 and 15, grease d is pushed out from the grease caps 5f, 5g, 15f and 15g The grease d is dropped onto the

  The invention according to claim 2 is the shutter winding and feeding apparatus 1 according to claim 1, wherein the pump structure 7 is fixed to the inside of the outer cylinder 5b and the inside of the outer cylinder 5b is made in the longitudinal direction. Disc 5b having a through hole 5baa on the central axis b of the link rod 5, a piston 5ad sliding in the longitudinal direction inside the outer cylinder 5b, and the piston 5ad in the through hole A connecting member 5ac is provided which is inserted through 5baa and connected to the closed end 5af of the inner cylinder 5a on the outer cylinder 5b side.

  The invention according to claim 3 is the shutter winding and unwinding device 21 according to claim 1, wherein the pump structure 17 is fixed to the inside of the outer cylinder 15b and the longitudinal direction of the inside of the outer cylinder 15b. A disk-like member 15ba having a first through hole 15baa on the central axis b of the link rod 15, a first piston 15ad sliding in the longitudinal direction inside the outer cylinder 15b, and the first piston 15ad A first connecting member 15ac for connecting the first piston 15ad to the closed end 15af of the inner cylinder 15a on the outer cylinder 15b side through the first through hole 15baa, and the inner cylinder 15a And a second through hole 15aa provided at a closed end 15af of the inner cylinder 15a on the side of the outer cylinder 15b, and a second piston 15bd sliding in the longitudinal direction of the inside of the second cylinder 15b The is inserted, characterized in that it comprises a second connecting member 15bc to be connected to the disk-like member 15ba.

  According to the invention as set forth in claim 1, when the shutter is wound up and delivered, the exchangeable grease cap fitted to cover the both end portions of the link bar and the link when the link bar extends and contracts in the longitudinal direction By providing the pump structure that pushes out the air inside the rod, when the link rod expands and contracts, the grease is pushed out of the grease cap, dripping grease on the shaft, and the dampers and springs Since grease is uniformly printed in the sliding region, it is possible to provide a long-life shutter winding and feeding device which prevents the wear of the shutter shaft and further extends the service life.

  According to the second aspect of the present invention, the pump structure is fixed to the inside of the outer cylinder and blocks the inside of the outer cylinder in the longitudinal direction, and a disc-like member having a through hole at the center and the inside of the outer cylinder By providing a connecting member as a post that connects the piston that slides the inside of the outer cylinder in the longitudinal direction to the disk member, when the link rod expands and contracts, the grease is pushed out from the grease cap and grease is applied on the shaft Is dripped and grease is uniformly printed on the sliding area of the pulley and the sliding area of the damper and spring around it, so that the shaft of the shutter is prevented from being worn and the service life of the shutter is extended. A feeding device can be provided.

  According to the invention as set forth in claim 3, the pump structure comprises a disk-like member having a first through hole, a first piston, a first connecting member, a second piston, and a second connecting member. When the link bar expands and contracts, the grease is pushed out of the grease cap, grease is dropped on the shaft, and grease is uniformly printed on the pulley sliding area and the sliding areas of the damper and spring around it. Therefore, it is possible to provide a long-life shutter take-up and delivery device which prevents the wear of the shutter shaft and further extends the service life.

It is the schematic of the link rod which concerns on the shutter winding delivery apparatus shown to the 1st Embodiment of this invention, (a) is a perspective view, (b) is an expanded sectional view of the A section shown to (a). It is the schematic which shows the pulley concerning the shutter winding delivery apparatus shown to 1st Embodiment of this invention, a link rod, and its periphery, (a) is front sectional drawing, (b) is B part shown to (a). FIG. It is the schematic of the link rod which concerns on the shutter winding delivery apparatus shown to the 2nd Embodiment of this invention, (a) is a schematic sectional drawing of a link rod, (b) is the structure of the link rod shown to (a). It is an expanded sectional view shown in detail. It is the schematic which shows the pulley concerning the shutter winding delivery apparatus shown to 2nd Embodiment of this invention, a link bar, and its periphery, (a) is front sectional drawing, (b) is C part shown to (a). FIG. It is an explanatory view explaining a pulley sliding field concerning a shutter winding delivery device showing a conventional embodiment, and (a) is an enlarged detailed view equivalent to D section shown in (b) of Drawing 4, (b) (A) is explanatory drawing which shows a mode that the pulley slid, and (c) is a front view of a link rod.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view of a link rod according to a shutter winding and feeding apparatus according to a first embodiment of the present invention, where (a) is a perspective view and (b) is an enlarged cross section of a portion A shown in (a) FIG.
FIG. 2 is a schematic view showing a pulley, a link rod and the periphery thereof according to the shutter winding and feeding device shown in the first embodiment of the present invention, wherein (a) is a front sectional view and (b) is (a) It is an expanded sectional view of the B section shown in.
As shown in (a) and (b) of FIG. 1 and (a) and (b) of FIG. 2, the shutter winding and feeding device 1 performs the shutter 2 when either the winding or the unwinding of the shutter 2 is performed. Two pulleys 4 and 4 which are fitted on a shaft 3 which is a central shaft for winding and unwinding and which are disposed apart from each other and rotatably provided with respect to the shaft 3 and these two pulleys 4 and 4 The link rods 5 can slide relative to each other in the shutter winding and feeding device 1 provided with one link rod 5 stretched between two pulleys 4, 4 so that the rotations of the two follow and synchronize with each other. Grease caps 5f and 5g provided with the inner cylinder 5a and the outer cylinder 5b and formed so as to be extensible and contractible in the longitudinal direction, and fitted at the end portions 5c and 5c of both ends of the link rod 5; When 5 stretches in the longitudinal direction A pump structure 7 to push out the air inside the link rod 5, the grease cap 5f by the link rod 5 is expanded and contracted, with the extruded grease d from 5g grease d on the shaft 3 is dropped.
The two pulleys 4 and 4 and one link rod 5 may be further appropriately increased to three pulleys 4, 4 and 4 and 2 to 3 link rods 5, 5 and 5, etc. .

  The pump structure 7 of the shutter winding and feeding device 1 is fixed to the inside of the outer cylinder 5b to block the inside of the outer cylinder 5b in the longitudinal direction, and has a through hole 5baa on the central axis b of the link rod 5. The disk-shaped member 5ba, the piston 5ad sliding in the longitudinal direction inside the outer cylinder 5b, and the piston 5ad are connected to the closed end 5af of the inner cylinder 5a on the outer cylinder 5b side through the through hole 5baa. And a connecting member 5ac.

  As described above, when the shutter is wound up and delivered, the exchangeable grease cap fitted over the both ends of the link bar and the air inside the link bar when the link bar extends and contracts in the longitudinal direction By providing the pump structure to push out, when the link rod expands and contracts, the grease is pushed out from the grease cap, the grease is dropped on the shaft, and the grease is applied to the pulley sliding area and the sliding area of the damper and spring around it. Since the printing is performed uniformly, it is possible to provide a long-life shutter winding and feeding device that prevents the wear of the shutter shaft and further extends the service life.

  Further, the pump structure is fixed to the inside of the outer cylinder to block the inside of the outer cylinder in the longitudinal direction, and the disk-like member having a through hole at the center and the inside of the outer cylinder to elongate the inside of the outer cylinder By providing a connecting member as a column for connecting the piston sliding in the direction to the disk member, when the link rod expands and contracts, the grease is pushed out from the grease cap, and the grease is dropped on the shaft, and the pulley sliding area And since grease is uniformly printed on the sliding area of the damper and spring around it, it is possible to prevent the wear of the shutter shaft and provide a long-life shutter winding and feeding device with a further extended service life. .

Next, the operation of the shutter winding and feeding device 1 will be described. In the shutter winding and feeding device 1, the shutter 2 is configured by connecting a plurality of slats 2a, 2a,. The shaft 3 is provided when either the winding or unwinding of the shutter 2 is performed, and both ends of the shaft 3 are horizontally supported by the bracket 10 with respect to the floor surface. The bracket 10 is fixed to a frame 11, and a shutter case 12 is attached to the frame 11 to cover the entire shutter winding and feeding device 1.
At both ends of a shaft 3 which is a central shaft for winding and unwinding the shutter 2, a plurality of pulleys 4 are provided rotatably with respect to the shaft 3. A link rod 5 is stretched over these at least two pulleys 4, 4 so that the rotations of the pulleys follow and synchronize with one another. Further, a stopper 6 fixed to the shaft 3 to prevent the pulleys 4 and 4 from sliding in the axial direction of the shaft 3, and a stopper fixed to the shaft 3 to prevent movement of the stopper 6 A pin 9 is provided.

At both ends of the shaft 3, pulley sliding regions 3 a are provided on the circumferential surface of the shaft 3 between the one stopper 6 and the one pulley 4. Similarly, a pulley sliding area 3 a is provided on the circumferential surface of the shaft 3 between the other stopper 6 and the other pulley 4.
A compression coil type spring 7 is inserted in the shaft 3 so as to be able to expand and contract. One end of the spring 7 is fixed to the shaft 3 by a spring end fixture 7 a, and the other end is in contact with the end of the pulley 4.
Further, a spring as a damper 8 is inserted on the opposite side of the pulley 4 to the spring 7 side. One of the dampers 8 is in contact with the pulley 4 and the other is in contact with the stopper 6. That is, it is between the pulley 4 and the stopper 6 and biased to maintain the distance between them. As a result, when the spring 7 is stretched and the pulley 4 slides toward the damper 8, the damper 8 works to push it back.

  A locking plate 13 is attached to the pulley 4. The locking plate 13 is fixed along the outer periphery so as to cover approximately a quarter of the outer periphery of the pulley 4. One end of the locking plate 13 is fixed by a bolt 13a. At the other end, a hook-like slat locking claw (not shown) is provided to suspend the slat. As a result, the locking plate 13 rotates forward and reverse together with the pulley 4 in synchronization with the winding and unwinding of the shutter 2.

In addition, a grease cup 14 is provided on the spring 7 side of the pulley 4. An appropriate amount of lubricating grease is filled in the grease cup 14 to lubricate the rotating portion of the pulley 4 and the shaft 3. Therefore, the central hole 14 b of the grease cup 14 is inserted in close contact with the shaft 3. The grease cup 14 is fixed to the pulley 4 by a bolt 14 c.
Further, as shown in FIG. 5C, in the shutter winding and feeding device 1, the link rod 5 is provided with an inner cylinder 5a and an outer cylinder 5b which can slide relative to each other, and is formed to be extensible and contractible in the longitudinal direction. The link rod 5 forms a slide mechanism in which the inner cylinder 5a and the outer cylinder 5b slide relative to each other. The outer cylinder 5b is provided with a grease injection hole 5c.
Thus, by providing the slide mechanism with the inner cylinder and the outer cylinder which can slide mutually, the link rod stretched between the pulleys can be expanded and contracted in the longitudinal direction of the link rod, and the pulley sliding region can be It can be effective.

Second Embodiment
Next, a second embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 3 is a schematic view of a link rod according to a shutter winding and feeding device according to a second embodiment of the present invention, in which (a) is a schematic sectional view of the link rod and (b) is a link shown in (a) It is an expanded sectional view showing the structure of a stick in detail.
FIG. 4 is a schematic view showing a pulley, a link rod, and the periphery thereof according to a shutter winding and feeding device according to a second embodiment of the present invention, wherein (a) is a front sectional view and (b) is (a) It is an expanded sectional view of the C section shown in.
The second embodiment of the present invention is different from the first embodiment in the structure of the link rod, and the same reference numerals as the reference numerals used in the first embodiment are not repeated.

  As shown in (a) and (b) of FIG. 3 and (a) and (b) of FIG. 4, in the shutter feeding device 21, the link rod 15 includes an inner cylinder 15 a and an outer cylinder 15 b that can slide relative to each other. , And extendable in the longitudinal direction of the link rod 15. At both ends of the link rod 15, grease caps 15f and 15g fitted to the ends 15c and 15c are provided. A pump structure 17 is provided which pushes out the air inside the link rod 15 when the link rod 15 expands and contracts in the longitudinal direction. As the link rod 15 expands and contracts, the grease d is pushed out from the grease caps 15 f and 15 g and drips onto the shaft 3.

  In addition, the pump structure 17 is fixed to the inside of the outer cylinder 15b to block the longitudinal direction of the inside of the outer cylinder 15b, and the disk-like member 15ba having the first through hole 15baa on the central axis b of the link rod 15. The first piston 15 ad sliding in the longitudinal direction inside the outer cylinder 15 b and the first piston 15 ad are inserted in the first through hole 15 baa and closed on the outer cylinder 15 b side of the inner cylinder 15 a The first connection member 15ac connected to the end 15af, the second piston 15bd sliding in the longitudinal direction inside the inner cylinder 15a, and the second piston 15bd are closed on the outer cylinder 15b side of the inner cylinder 15a A second connecting member 15bc is provided which is inserted into the second through hole 15aaa provided in the end portion 15af and connected to the disc-like member 15ba.

  According to this, when the shutter is wound up and delivered, the exchangeable grease cap is fitted over the both ends of the link bar, and the air inside the link bar when the link bar extends and contracts in the longitudinal direction The pump structure includes a disk-like member having a first through hole, a first piston, a first connection member, a second piston, and a second connection member. By providing, when the link bar expands and contracts, the grease is pushed out of the grease cap, the grease is dropped on the shaft, and the grease is uniformly printed on the sliding area of the pulley and the sliding area of the damper and spring around it. Thus, it is possible to provide a long-life shutter winding and feeding device which prevents the wear of the shutter shaft and further extends the service life.

  The preferred embodiments have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. For example, although 1 link rod was provided and demonstrated, you may provide two to three.

  The present invention can be applied to a shutter winding and feeding apparatus provided with a shaft that is a central shaft for winding and feeding the shutter.

Reference Signs List 1 shutter take-out and feeding device 2 shutter 2a slat 3 shaft 3a pulley sliding area 4 pulley 4a locking plate 5 link rod 5a inner cylinder 5aa small diameter portion 5ab large diameter portion 5ac support member, connecting member 5ad piston 5ada packing 5ae spring 5af end portion 5b Outer cylinder 5ba disc-like member 5baa through hole (provided at the center of the disc-like member)
5bb pin (for fixing the disk-shaped member 5ba)
5c end 5f grease cap 5fa grease dripping hole 5g grease cap 5ga grease dripping hole 5h pulley fixing part 6 stopper (with thrust bearing)
Reference Signs List 7 pump structure 8 damper 9 stopper pin 10 bracket 11 frame 12 shutter case 13 spring 13 a spring end fixture 14 grease cup 14 a grease 15 link rod 15 a inner cylinder 15 aa air hole 15 aaa second through hole 15 ac first connecting member 15 ad 1st piston 15ada packing 15af end 15b outer cylinder 15ba disc-like member 15baa 1st through hole 15bb pin 15bc second connecting member 15bd 2nd piston 15bda packing 15be air hole 15c end 15f grease cap 15fa drip hole 15g Grease cap 15ga Dropper hole 15h Pulley fixing part 17 Pump structure 21 Shutter take-up and delivery device

Claims (3)

When the shutter (2) is either taken up or unwound, the shutter (2) is fitted on a shaft (3) which is a central axis for winding and unwinding, and is disposed apart from each other At least two pulleys (4, 4) provided rotatably with respect to the shaft (3);
At least one link rod (5, 15) bridged between the at least two pulleys (4, 4) so as to follow and synchronize the rotation of the at least two pulleys (4, 4) with each other; In the shutter winding and feeding device (1, 21) provided with
The link rod (5, 15) includes an inner cylinder (5a, 15a) and an outer cylinder (5b, 15b) that can slide relative to each other, and is formed so as to be stretchable in the longitudinal direction of the link rod (5, 15) Link bar,
The link rods (5, 15) are grease caps (5f, 5g, 15f, 15g) fitted to the ends (5c, 5c, 15c, 15c) of both ends of the link rods (5, 15), A pump structure (7, 17) for pushing out the air inside the link rods (5, 15) when the link rods (5, 15) expand and contract in the longitudinal direction;
By expanding and contracting the link rods (5, 15), the grease (d) is pushed out from the grease cap (5f, 5g, 15f, 15g) and the grease (d) is dropped onto the shaft (3) A shutter winding and feeding device (1, 21) characterized in that. The pump structure (7) is fixed to the inside of the outer cylinder (5b) to block the inside of the outer cylinder (5b) in the longitudinal direction, and on the central axis (b) of the link rod (5) A disc-like member (5ba) having a through hole (5baa),
A piston (5ad) sliding in the longitudinal direction inside the outer cylinder (5b);
A connecting member (5ac) for inserting the piston (5ad) through the through hole (5baa) and connecting it to the closed end (5af) of the inner cylinder (5a) on the outer cylinder (5b) side;
The shutter winding and feeding device (1) according to claim 1, characterized in that it comprises: The pump structure (17) is fixed to the inside of the outer cylinder (15b) to block the longitudinal direction of the inside of the outer cylinder (15b), and on the central axis (b) of the link rod (15). A disc-like member (15ba) having a first through hole (15baa);
The first piston (15ad) sliding in the longitudinal direction inside the outer cylinder (15b) and the first piston (15ad) are inserted through the first through hole (15baa) to the inner cylinder A first connection member (15ac) connected to the closed end (15af) on the outer cylinder (15b) side of (15a);
The second piston (15bd) sliding in the longitudinal direction inside the inner cylinder (15a) and the second piston (15bd) are closed on the outer cylinder (15b) side of the inner cylinder (15a) A second connection member (15bc) which is inserted into a second through hole (15aaa) provided at the end portion (15af) and connected to the disc-like member (15ba);
The shutter winding and unwinding device (21) according to claim 1, characterized in that it comprises:

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