JP7455875B2 - Tension-fixed pillar - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies November 10th to 12th, 2021, 48th International Welfare Equipment Exhibition (H.C.R. 2021), sponsored by the National Social Welfare Council, Health and Welfare Public Relations Association, Tokyo Exhibited at Big Sight Aomi Exhibition Building.

TECHNICAL FIELD The present invention relates to a tension-fixed support column installed between a floor and a ceiling wall.

Regarding this type of strut, the present applicant has previously proposed a tension-fixed strut as disclosed in Patent Document 1. The support column of Patent Document 1 includes an upper frame body including a ceiling pressing body, a lower frame body including a floor contacting body, a locking mechanism provided between the upper frame body and the lower frame body, and the like. The locking mechanism consists of a fulcrum ring fixed to the top of the lower frame body, a holding ring that holds and fixes the upper frame body, a lock handle that is supported by the holding ring so as to be able to swing up and down, and a fulcrum ring and a lock. It includes a push-up link that connects the handle, and a cam structure provided between the holding ring and the lock handle.

When using the support of Patent Document 1, place the ground contacting body on the floor, raise the lower frame body, and in this state, slide the upper frame body upward with respect to the lower frame body, and then lift the ceiling pressing body. Directly face the ceiling through a small gap. Next, the lock handle is swung downwards, the diameter of the holding ring is reduced by the cam structure, and the upper frame is held and fixed, and the lock handle is further swung downwards, and the push-up reaction force of the push-up link is Push up the upper frame body and the ceiling pressing body to bring them into close contact with the ceiling, and secure the entire support column between the floor and the ceiling wall.

JP 2018-40153 Publication

According to the tension-fixed type pillar of Patent Document 1, it is possible to prevent the fulcrum ring and the holding ring from being exposed to the outer surface of the pillar when the lock handle is swung downward from the unlocked position to the locked position, and further Since the link guide portion of the push-up link and fulcrum ring can be covered with the lock handle, the appearance of the column can be kept clean. However, because the length of the lock handle is short, it is necessary to apply a large amount of force when locking the lock handle during installation of the column. Sometimes the lock handle tilted and the lock handle had to be re-locked. These problems can be resolved by increasing the length of the handle, but if you simply increase the length of the handle, the long lock handle will be exposed outside the column when the lock handle is locked, and after installation Under normal conditions, it is inevitable that the appearance will be greatly impaired.

An object of the present invention is to make it possible to compactly organize the lock handle that has been switched to the locked state, even though the lock handle can be operated with less force during installation work, and to improve the appearance of the lock handle in its normal state after installation. The purpose of the present invention is to provide a tension-fixed support that does not impair its appearance.

The tension fixed type support column according to the present invention includes an upper frame body 1 having a ceiling pressing body 3 that comes into contact with a ceiling R, a lower frame body 2 having a floor contacting body 4 placed on a floor F, and a lower frame A lock mechanism 5 is provided between the upper part of the body 2 and the middle part of the upper frame body 1 to lock and hold the upper frame body 1 pulled out from the lower frame body 2 so that it cannot move up and down. The locking mechanism 5 includes a fulcrum ring 8 fixed to the upper part of the lower frame body 2, a holding ring 9 that fits onto the upper frame body 1 and holds and fixes the middle part of the upper frame body 1, and The lock handle 11 is supported by a handle support shaft 10 provided on a ring 9 so as to be able to swing up and down, and a push-up link 12 connects the fulcrum ring 8 and the lock handle 11. The lock handle 11 includes a handle base 31 connected to the holding ring 9 via a handle support shaft 10, and an extendable handle 32 configured to be extendable and retractable with respect to the handle base 31. In the lock handle 11, the handle base 31 and the extension handle 32 protrude outward from the holding ring 9 around the handle shaft 10, and release the holding ring 9 from holding and fixing the upper frame 1. between the unlocked position in which the handle base 31 and the extension handle 32 are along the circumferential surface of the lower frame body 2, and the locked position in which the upper frame body 1 is held and fixed by the holding ring 9. Swing displacement is possible. The extension handle 32 has two positions: a retracted position in which it covers the outer surface of the handle base 31, and an extended position in which it is extended from the end of the handle base 31 in the extension direction of the handle base 31 to increase the length of the lock handle 11. The lock handle 11 is configured to be slidable between the lock handle 11 and the lock handle 11 when the extension handle 32 is in the extended position. It is characterized by

A first lock structure 55 is provided between the lock handle 11 and the fulcrum ring 8 to prevent the extendable handle 32 in the retracted position from extending from the end of the handle base 31 to the outside of the base.

The first lock structure 55 includes a lock recess 56 provided at the lower part of the fulcrum ring 8 and opening laterally outward, and a lock piece 57 provided in the handle base 31 and provided with a lock pawl 58 that engages and disengages from the lock recess 56. Equipped with. The lock piece 57 is capable of reciprocating sliding relative to the handle base 31 between an engagement position in which the lock pawl 58 engages with the lock recess 56 and a disengagement position in which the lock pawl 58 disengages from the lock recess 56. Guidance is supported. When the lock handle 11 is in the retracted position, by setting the lock piece 57 to the engaged position, the lock pawl 58 is engaged with the lock recess 56, and the extension handle 32 is displaced from the retracted position to the extended position. is structured so that it is regulated.

A second lock structure 62 is provided to restrict the posture displacement of the lock handle 11 from the locked position to the unlocked position.

The second lock structure 62 includes a second lock recess 63 that is provided at the lower part of the fulcrum ring 8 and opens downward, and a second lock pawl 64 that is provided on the extension handle 32 and that engages and disengages from the second lock recess 63. Be prepared. When the extendable handle 32 is switched to the retracted position, the second lock pawl 64 engages with the second lock recess 63, and the handle base 31 and the extendable handle 32 can swing about the handle shaft 10. By lowering the extendable handle 32 from the retracted position to the extended position along the handle base 31, the second lock pawl 64 disengages from the second lock recess 63, and the handle base 31 and the extendable handle 32 are separated. It is configured to be able to swing around the handle support shaft 10.

A moderation structure 66 is provided between the handle base 31 and the extendable handle 32 to engage and hold the extendable handle 32 in each of the retracted position and the extended position. The moderation structure 66 includes a fixed moderation body 67 provided on the handle base 31 and provided with a pair of elastic claws 68, and upper and lower movable moderation bodies 69a and 69b provided on the inner surface of the extension handle 32. When the extension handle 32 is switched to the retracted position, the fixed moderation body 67 is engaged with the lower movable moderation body 69b, and when the extension handle 32 is switched to the extended position, the fixed moderation body 67 is engaged with the lower movable moderation body 69b. It is configured to engage with the upper movable moderation body 69a.

The holding ring 9 is formed of an aluminum die-cast molded product including a ring body portion 28 having a C-shaped cross section and a pair of bracket portions 29 continuously protruding from the cylindrical peripheral end of the ring body portion 28. A handle holding structure 73 is provided between the bracket part 29 of the holding ring 9 and the lock handle 11 to receive the lock handle 11 switched to the unlocked position. It is composed of a stopper frame 74 fixed to the outer surface of the upper end, and a holding protrusion 75 formed bulging on the arcuate circumferential surface of the bracket part 29 of the holding ring 9. A stopper arm 76 is provided which gets over the holding protrusion 75 while elastically deforming along the holding protrusion 75.

According to the present invention, the extension handle 32 of the lock handle 11 constituting the lock mechanism 5 that locks and holds the upper frame 1 so as not to be able to move up and down is in a retracted position covering the outer surface of the handle base 31 and at the end of the handle base 31. If the handle base 31 is extended in the direction in which the handle base 31 is extended, and the lock handle 11 is extended to increase the length thereof, the handle base 31 can be slid in the extended position. By performing the locking operation while the lock handle 32 is in the extended position, the locking operation can be performed while increasing the handle length of the lock handle 11. Therefore, the lock handle 11 can be switched from the unlocked state to the locked state with a smaller force. can do. In addition, in the normal state after installation of the support, by switching the lock handle 11 to the locked state and putting the extension handle 32 in the retracted position, the lock handle 11 can be compacted and the appearance of the lock mechanism 5 can be made neat. It can be assumed that Therefore, it is possible to prevent the external appearance of the support post from being damaged in its normal state after installation.

If a first locking structure 55 is provided between the lock handle 11 and the fulcrum ring 8 to prevent the extension handle 32 from switching to the extension position, the extension handle 32 will be in the retracted position in the normal state after the support is installed. This can prevent the user from inadvertently switching from the position to the extended position.

When the first lock structure 55 is composed of a lock recess 56 provided in the fulcrum ring 8 and a lock piece 57 that is slidably guided by the handle base 31 and engages and disengages from the lock recess 56, the extension handle 32 can be moved to the retracted position. By switching the lock piece 57 from the disengaged position to the engaged position, the lock piece 57 is engaged with the lock recess 56, and the extension handle 32 is inadvertently switched from the retracted position to the extended position. You can prevent it from changing.

If the second locking structure 62 that restricts the posture displacement of the lock handle 11 from the locked posture to the unlocked posture is provided, the lock handle 11 will inadvertently change from the locked posture to the unlocked posture in the normal state after the support is installed. Posture displacement can be prevented.

A second lock structure 62 includes a second lock recess 63 that is provided at the lower part of the fulcrum ring 8 and opens downward, and a second lock pawl 64 that is provided on the extension handle 32 and that engages and disengages from the second lock recess 63. When the extendable handle 32 is switched to the retracted position, the second lock pawl 64 engages with the second lock recess 63, and the handle base 31 and the extendable handle 32 swing around the handle shaft 10. When the extension handle 32 is lowered along the handle base 31 from the retracted position to the extended position, the second lock pawl 64 is disengaged from the second lock recess 63, and the handle base 31 and the extension handle are prevented from moving. The handle 32 can be configured to be swingable around the handle support shaft 10. According to this locking mechanism 5, by switching the extendable handle 32 from the extended position to the retracted position, the second lock pawl 64 engages with the second lock recess 63, and the handle base 31 and the extendable handle 32 are connected to the handle support shaft. Swinging around 10 can be restricted. Therefore, even if a body or a part of the wheelchair collides with the support column and an external force is applied to the lock handle 11, the handle base 31 and the extension handle 32 can be moved around the handle support shaft 10 by the lower frame. Swinging away from the body 2 can be prevented. Further, the second locking structure 62 can be switched to the locked state simply by sliding the extension handle 32 from the extension position to the storage position, and conversely, by simply sliding the extension handle 32 from the storage position to the extension position. Since it can be switched to the unlocked state, the second lock structure 62 can be switched between the locked state and the unlocked state with less effort.

If the moderation structure 66 that engages and holds the extendable handle 32 in the retracted position and the extended position is provided between the handle base 31 and the inner handle body 40, the extendable handle 32 can be held in the retracted position or the extended position. Since the position can be maintained, even if an external force or vibration is applied to the lock mechanism 5, the extension handle 32 can be prevented from being inadvertently slid. Specifically, the moderation structure 66 is composed of a fixed moderation body 67 provided on the handle base 31 and upper and lower movable moderation bodies 69a and 69b provided on the inner surface of the extension handle 32, so that the extension handle 32 can be switched to the retracted position. In the extended state, the fixed moderation body 67 engages with the lower movable moderation body 69b, and when the extension handle 32 is switched to the extended position, the fixed moderation body 67 engages with the upper movable moderation body 69a. Do it like this.

The holding ring 9 is formed of an aluminum die-cast molded product having a ring main body part 28 having a C-shaped cross section and a pair of bracket parts 29, and the lock handle 11 is received between the bracket part 29 and the lock handle 11. When the handle holding structure 73 is provided, the lock handle 11 is placed in the unlocked position while the upper frame body 1 is pulled out from the lower frame body 2 and the ceiling pressing body 3 is made to directly face the ceiling R. The position can be maintained in the same state. Therefore, a series of operations for tensioning and fixing the support between the ceiling R and the floor F can be accurately performed by only one worker.

FIG. 2 is a partially cutaway side view of a tension-fixing type strut according to an embodiment of the present invention. FIG. 3 is a side view showing an example of installing a tension-fixing type support. FIG. 3 is a longitudinal side view of the extension handle in a state where it is in a retracted position. FIG. 3 is an exploded perspective view of the locking mechanism. FIG. 3 is an exploded perspective view of the lock handle. It is a sectional view of the lower part of the lock handle showing the first and second lock structures. 11 is a cross-sectional view taken along line AA in FIG. 10. FIG. FIG. 3 is a cutaway sectional view of the cover body of the lock handle. FIG. 3 is a cross-sectional view showing the expansion and contraction operation of the cam structure. FIG. 3 is a longitudinal side view showing the lock handle in an unlocked state. FIG. 6 is a side view showing the locking operation of the lock handle and the retracting operation of the extension handle.

(Embodiment) FIGS. 1 to 11 show an embodiment of a tension-fixing type strut of the present invention. In this embodiment, front and back, left and right, and up and down follow the arrows shown in FIGS. 1 and 4 and the front and back, left and right, and up and down indications written near each arrow. In FIG. 2, the tension-fixed support column includes an upper frame body 1 having a ceiling pressing body 3 that comes into contact with the ceiling R, a lower frame body 2 having a floor contacting body 4 placed on the floor F, and a lower frame A lock mechanism 5 is provided between the upper part of the body 2 and the middle part of the upper frame body 1 to lock and hold the upper frame body 1 pulled out from the lower frame body 2 so that it cannot move up and down. The upper frame body 1 is formed of a stainless steel round pipe, and the lower frame body 2 is formed of a high-strength aluminum alloy round pipe coated with resin. When the outer diameter of the lower frame body 2 is 40 mm, the outer diameter of the upper frame body 1 is 32 mm, and the upper frame body 1 is connected to the lower frame body 2 so as to be removable due to the difference in diameter. .

As shown in FIG. 4, the locking mechanism 5 includes a fulcrum ring 8 fixed to the upper part of the lower frame body 2, and a support ring 8 that is fitted onto the upper frame body 1 to hold and fix the middle part of the frame body 1. The ring 9, the lock handle 11 supported so as to be vertically swingable by a handle support shaft 10 provided on the holding ring 9, the push-up link 12 connecting the support ring 8 and the lock handle 11, and the holding ring 9. Equipped with a cam structure that operates to reduce the diameter.

As shown in FIGS. 3 and 4, the fulcrum ring 8 is composed of an upper ring body 8A and a lower ring body 8B. The upper ring body 8A is a plastic molded product, and has a slide opening 15 in the upper half of the front surface of the ring body 14 in the shape of a cylinder, and a pair of left and right decorative walls 16 on the cylinder circumferential surface below the opening 15. A receiving frame 18 is formed above the slide opening 15 so as to project forward and into which the upper end cover 17 is fitted and fixed. The lower ring body 8B has a lower ring part 20 having the same outer diameter as the ring body 14 of the upper ring body 8A, and an upper ring part 21 having a smaller diameter than the lower ring part 20. A pair of left and right guide frames 22 are formed in the frame 22, and screw holes are formed in the lower front surface of the frames 22. A link groove 23 for slidingly guiding the fulcrum shaft 37 of the push-up link 12 is formed in the pair of guide frames 22 . In the lower ring body 8B, the lower ring part 20 is fitted onto the upper end of the lower frame body 2, and in this state it is fixed to the lower frame body 2 with screws 24 screwed into the lower frame body 2 from the screw holes on the front surface of the lower ring part 20. has been done. In addition, the upper ring body 8A has its ring body 14 fitted onto the upper ring portion 21 of the lower ring body 8B, so that the decorative wall 16 covers the outside of the guide frame 22 of the lower ring body 8B. The upper ring body 8A is fixed to the lower ring body 8B with screws 25 screwed from the outer surface of the decorative wall 16 toward the guide frame 22.

As shown in FIG. 4, the holding ring 9 is made of aluminum and includes a ring main body 28 having a C-shaped cross section and a pair of brackets 29 continuously protruding from the cylindrical peripheral end of the ring main body 28. Made of die-cast molding. The left and right bracket parts 29 face each other with a gap in between, and by narrowing this gap with a cam structure, the cylindrical wall of the ring body part 28 is brought into close contact with the upper frame body 1, and the upper frame is moved by the frictional force between them. Hold and fix body 1. The ring main body portion 28 of the holding ring 9 is accommodated in the inner surface of the upper ring body 8A. Therefore, when the column is stretched and fixed between the ceiling R and the floor F, the lock handle 11 is the only member exposed on the outer surface of the column, and the appearance of the column can be made neat.

As shown in FIGS. 1, 4, and 5, the lock handle 11 includes a handle base 31 and an extension handle 32 that is telescopically slid and guided by the base 31. The handle base 31 is composed of a frame having a U-shaped cross section, and a pair of connecting parts 33 formed at the upper end thereof are connected to the bracket part 29 of the holding ring 9 through the handle support shaft 10. The handle support shaft 10 made of a hexagonal bolt is inserted into the support shaft hole of the bracket part 29 and the connecting part 33, and is fixed with a nut 34 screwed into the shaft end. One end of the push-up link 12 is connected to a pair of link frames 35 formed on the upper inner surface of the handle base 31 by a link shaft 36, and the other end of the push-up link 12 is connected to the guide frame 22 via a fulcrum shaft 37. It is connected to the link groove 23 of.

As shown in FIGS. 1 and 5, the extension handle 32 includes an inner handle body 40 that is slidably guided by the handle base 31, and a cover body 41 that covers the outer surface of the inner handle body 40. The inner handle body 40 is composed of a pair of left and right half-split handle bodies 40a and 40b.The pair of half-split handle bodies 40a and 40b sandwich the handle base 31 from the left and right sides, and in this state, the half-split handle bodies 40a and 40b are separated. is integrated with the handle base 31 by fastening with three screws 42. Engagement grooves 43 for regulating relative sliding between the inner handle body 40 and the cover body 41 are formed at four locations on the outer surface of the half-split handle bodies 40a and 40b, and engagement grooves 43 are formed at four locations on the upper and lower surfaces of the inner surface of the cover body 41 (total Engagement ribs 44 (see FIG. 8) that engage with the engagement grooves 43 are formed at eight locations. The cover body 41 is formed to be slightly longer than the inner handle body 40, and a slide groove 45 for a lock piece 57, which will be described later, is formed at its lower end. The cover body 41 is externally fitted onto the inner handle body 40, and as shown in FIG. , is integrated with the inner handle body 40.

The extendable handle 32 can be placed in a retracted position (the state shown in FIG. 3) in which the handle 32 covers the outer surface of the handle base 31, and in which the extendable handle 32 extends from the end of the handle base 31 to the outside of the base to increase the length of the handle. It can be slid between the extended position (the state shown in FIG. 1) and the extended position. For this purpose, a pair of guide ribs 47, 47 are provided on the lower outer surfaces of the left and right walls of the handle base 31, and these guide ribs 47, 47 slide and guide the slide ribs 48 provided on the inner surfaces of the side walls of the halved handle bodies 40a, 40b. (See Figure 5). The lock handle 11 has a lock release position (the state shown in FIG. 10) in which the handle base 31 and the extension handle 32 protrude outward from the holding ring 9 around a handle support shaft 10 provided on the holding ring 9. , the handle base 31 and the extension handle 32 swing along the circumferential surface of the lower frame body 2, and the upper frame body 1 is held and fixed by the holding ring 9 in a locked position (the state shown in FIG. 1). Displaceable.

A cam structure is provided between the bracket portion 29 of the holding ring 9 and the connecting portion 33 of the handle base 31 to reduce the diameter of the holding ring 9 when the lock handle 11 is swung to the locked position. ing. The cam structure is composed of a pair of fan-shaped cam pieces 51 bulging from the outer surface of the bracket portion 29 and an operating portion 52 provided on the opposing surface of the connecting portion 33 (see FIG. 4). When the lock handle 11 is swung downward from the unlocked position to the locked position, the flat operation part 52 rides on the cam piece 51, narrows the gap between the bracket parts 29, and brings the ring body part 28 into close contact with the upper frame body 1. Fix it.

A first lock structure 55 is provided between the lock handle 11 and the fulcrum ring 8 in order to prevent the extension handle 32 in the retracted position from being unnecessarily slid into the extension position. The first lock structure 55 includes a lock recess 56 that is provided at the lower part of the fulcrum ring 8 and opens forward (laterally outward), and a lock piece 57 that has a lock pawl 58 that engages and disengages from the lock recess 56 (Fig. 1, see Figure 10). A slide groove 59 is formed in the left and right sides of the lock piece 57 (see FIGS. 5 and 6), and this slide groove 59 is guided by guide ribs 60 provided on the lower opposing surfaces of the halved handle bodies 40a and 40b. As a result, the lock piece 57 is guided and supported so as to be able to reciprocate back and forth between the engaged position shown in FIG. 3 and the disengaged position shown in FIG. 6. As shown in FIG. 3, when the extension handle 32 is in the retracted position and the lock piece 57 is switched to the engaged position, the lock pawl 58 engages with the lock recess 56, so that the extension handle 32 is in the extended position. It is not possible to make a sliding displacement. Furthermore, when the lock piece 57 in the engaged position is slid forward and switched to the disengaged position as shown in FIG. It can be slid to an extended position as shown in FIG. 1.

A second locking structure 62 is provided between the handle base 31 and the lower part of the inner handle body 40 in order to prevent the extendable handle 32 in the retracted position from unnecessarily swinging around the handle shaft 10. It is being As shown in FIG. 6, the second lock structure 62 includes a second lock recess 63 provided at the bottom of the lower ring body 8B (fulcrum ring 8) and opening downward, and a second lock recess 63 provided in the inner handle body 40 and opened downward. A second lock pawl 64 that engages and disengages from the recess 63 is provided.

When the extendable handle 32 is switched to the retracted position, the second lock pawl 64 engages with the second lock recess 63, so that the handle base 31 and the extendable handle 32 are held in the locked state, and both 31 and 32 are held in the locked state. Inadvertent swinging around the handle support shaft 10 can be prevented. Therefore, even if a body or a part of the wheelchair collides with the support column and an external force is applied to the lock handle 11, the handle base 31 and the extension handle 32 can be moved around the handle support shaft 10 by the lower frame. It is possible to reliably prevent swinging away from 2. Further, the second locking structure 62 can be switched to the locked state simply by sliding the extension handle 32 from the extension position to the storage position, and conversely, by simply sliding the extension handle 32 from the storage position to the extension position. Since it can be switched to the unlocked state, the second lock structure 62 can be switched between the locked state and the unlocked state with less effort.

A moderation structure 66 is provided between the handle base 31 and the inner handle body 40 to engage and hold the extendable handle 32 in the retracted position and the extended position. As shown in FIG. 5, the moderation structure 66 includes a fixed moderation body 67 provided on the handle base 31 and provided with a pair of elastic claws 68, and upper and lower movable moderation bodies 69a and 69b provided on the inner surface of the extension handle 32. configured. In this embodiment, a slide groove 70 that allows the fixed moderation body 67 and the inner handle body 40 to slide relative to each other is formed between the joint surfaces of the pair of half-split handle bodies 40a and 40b, and the upper and lower sides of the opposing surfaces of the slide groove 70 are Movable moderation bodies 69a and 69b are formed in recesses. When the extension handle 32 is switched to the retracted position, the fixed moderation body 67 engages with the lower movable moderation body 69b as shown in FIG. As shown in FIG. 1, the fixed moderation body 67 engages with the upper movable moderation body 69a.

A handle holding structure 73 is provided between the bracket portion 29 of the holding ring 9 and the lock handle 11 to receive the lock handle 11 which has been switched to the unlocked position and further pushed forward and upward. As shown in FIGS. 4 and 5, the handle holding structure 73 includes a stopper frame 74 fixed to the outer surface of the upper end of the handle base 31, and a holding protrusion 75 formed bulging on the arc circumferential surface of the bracket portion 29 of the holding ring 9. It consists of The stopper frame 74 is a frame body having a U-shaped cross section, and a stopper arm 76 is provided at the upper end of the frame body so as to be elastically deformed along the arcuate circumferential surface of the bracket portion 29 and to ride over the holding protrusion 75 .

The tension-fixing type column configured as described above is constructed by placing the grounding body 4 on the floor F, raising the lower frame body 2, and in this state, the upper frame body 1 is oriented upward with respect to the lower frame body 2. Slide the ceiling pressing body 3 to face the ceiling R with a slight gap therebetween. The lock handle 11 in this state is switched to the unlocked position as shown in FIGS. 2, 10, and 11(a), and is held in position by the handle holding structure 73. When the lock handle 11 in this state is swung downward, the push-up link 12 moves downward along the link groove 23 along with the lock handle 11, as shown by the imaginary line in FIG. It is received at the lower end of the link groove 23. When the lock handle 11 is further pressed down, the operating part 52 provided on the connecting part 33 rides on the cam piece 51, so the pair of bracket parts 29 approach each other, and the ring main body part 28 is reduced in diameter and the upper frame body Hold and fix 1. In this state, the fulcrum shaft 37 is received at the lower end of the link groove 23, so the handle base 31 is supported with tension by the push-up link 12, and after the upper frame body 1 is pushed up toward the ceiling R, as shown in FIG. As shown in (b), the lock handle 11 is switched to the locked position. As a result, the upper frame body 1 is pushed up by the push-up reaction force of the push-up link 12, and the ceiling press body 3 comes into close contact with the ceiling R, thereby fixing the entire column in tension between the floor F and the ceiling R. Thereafter, as shown in FIG. 11(c), the extension handle 32 is returned to the retracted position and the second locking structure 62 is switched to the locked state. Further, the lock piece 57 is switched to the slide lock position to prevent the extension handle 32 from switching to the extension position. In addition, when changing the fixing position of a tension-fixed type support column or temporarily removing it, it is better to perform the above procedure in reverse.

As described above, according to the tension-fixing type strut described in this embodiment, the lock mechanism 5 can be switched to the locked state with the extension handle 32 in the extended position and the length of the lock handle 11 increased. As a result, the locking mechanism 5 can be switched to the locked state with a smaller force. In addition, when the lock mechanism 5 is switched to the locked state, by returning the extension handle 32 to the retracted position, the lock handle 11 can be stored in a compact state, and the external appearance of the lock mechanism 5 can be made neat. can do.

Since the first lock structure 55 is provided between the lock handle 11 and the fulcrum ring 8 to prevent the extension handle 32 from switching to the extended position, the extension handle 32 can be prevented from being inadvertently switched from the retracted position to the extended position. can be prevented. Therefore, under normal conditions, unless the user clearly intends to switch the lock piece 57 to the slide unlocking position, the extendable handle 32 in the retracted position will not be slid into the extended position.

Since the second lock structure 62 that prevents the extension handle 32 from swinging is provided between the handle base 31 and the lower part of the inner handle body 40, the lock handle 11 is locked from the locked position in the normal state after the support is installed. Inadvertent posture displacement to the release posture can be prevented.

Since the moderation structure 66 that engages and holds the extendable handle 32 in the retracted position and the extended position is provided between the handle base 31 and the inner handle body 40, the extendable handle 32 can be held in position in the retracted position or the extended position. Therefore, even if an external force or vibration is applied to the lock mechanism 5, the extension handle 32 can be prevented from being inadvertently slid.

The holding ring 9 is formed of an aluminum die-cast molded product having a ring main body part 28 having a C-shaped cross section and a pair of bracket parts 29, and the lock handle 11 is received between the bracket part 29 and the lock handle 11. Since the handle holding structure 73 is provided, the lock handle 11 can be placed in the unlocked position while the upper frame body 1 is pulled out from the lower frame body 2 and the ceiling pressing body 3 is made to directly face the ceiling R. Can be held in place. Therefore, a series of operations for tensioning and fixing the support between the ceiling R and the floor F can be accurately performed by only one worker.

In addition to the embodiments described above, the fulcrum ring 8 can also be constructed as one piece. Moreover, the lock handle 11 can be formed from a metal material.

1 Upper frame body 2 Lower frame body 3 Ceiling pressing body 4 Floor contact body 5 Locking mechanism 8 Fulcrum ring 9 Holding ring 10 Handle spindle 11 Lock handle 12 Push-up link 31 Handle base 32 Extension handle 40 Inner handle body 40a, 40b Half handle body 41 Cover body 55 First lock structure 56 Lock recess 57 Lock piece 58 Lock claw 62 Second lock structure 63 Second lock recess 64 Second lock claw 66 Moderation structure 67 Fixed moderation body 68 Elastic claw 69a Upper movable Moderating body 69b Lower movable moderating body 70 Slide groove 73 Handle holding structure 74 Stopper frame 75 Holding protrusion 76 Stopper arm

Claims (7)

An upper frame body (1) comprising a ceiling pressing body (3) that comes into contact with the ceiling (R), a lower frame body (2) comprising a floor contacting body (4) placed on the floor (F), A locking mechanism that is provided between the upper part of the frame (2) and the middle part of the upper frame (1) and locks and holds the upper frame (1) pulled out from the lower frame (2) so that it cannot move up and down. (5) and
The lock mechanism (5) includes a fulcrum ring (8) fixed to the upper part of the lower frame body (2), and a fulcrum ring (8) that is fitted onto the upper frame body (1) to hold the middle part of the upper frame body (1). A holding ring (9) to be fixed, a lock handle (11) supported in a vertically swingable manner by a handle support shaft (10) provided on the holding ring (9), a fulcrum ring (8) and a lock handle ( 11) and a push-up link (12) for connecting the
The lock handle (11) includes a handle base (31) connected to the holding ring (9) via a handle spindle (10), and an extension handle configured to be extendable and retractable with respect to the handle base (31). (32) and
The lock handle (11) includes a handle base (31) and an extension handle (32) that protrude outward from the holding ring (9) around the handle support shaft (10). The lock release posture releases the holding and fixing state of the upper frame body (1) by the handle base (31) and the extension handle (32) along the circumferential surface of the lower frame body (2), and the holding ring ( 9) can be oscillated between a locked position in which the holding and fixed state of the upper frame body (1) is established;
The extendable handle (32) has a storage position that covers the outer surface of the handle base (31), and a lock handle (11) that is extended from the end of the handle base (31) in the extending direction of the handle base (31). The lock handle (11) is configured to be slidable between an extended position that increases the length of the lock handle (11) and an unlocked position and a locked position with the extended handle (32) in the extended position. A fixed-strut type strut characterized by being configured so that it can be switched. The tension-fixed support column according to claim 1, further comprising a first locking structure (55) for regulating posture displacement of the extension handle (32) from the retracted position to the extended position. A first locking structure (55) is provided at the lower part of the fulcrum ring (8) and opens outward and laterally, and at the handle base (31), and is connected to and disengaged from the locking recess (56). a lock piece (57) equipped with a lock claw (58) to
The lock piece (57) is between an engaged position in which the lock claw (58) engages with the lock recess (56) and a disengaged position in which the lock claw (58) disengages from the lock recess (56). It is guided and supported in a reciprocating manner relative to the handle base (31),
When the lock handle (11) is in the retracted position, by setting the lock piece (57) to the engaged position, the lock pawl (58) is engaged with the lock recess (56), and the extension handle (32) is moved. The tension-fixing type strut according to claim 2, which is configured to restrict posture displacement from the retracted posture to the extended posture. The tension-fixing type strut according to any one of claims 1 to 3, further comprising a second locking structure (62) that restricts posture displacement of the lock handle (11) from a locked position to an unlocked position. A second lock structure (62) is provided in a second lock recess (63) provided in the lower part of the fulcrum ring (8) and opens downward, and in a second lock recess (63) provided in the extension handle (32). A second lock claw (64) that engages and disengages,
When the extendable handle (32) is switched to the retracted position, the second lock claw (64) engages with the second lock recess (63), and the handle base (31) and extendable handle (32) are connected to the handle support shaft. Swinging around (10) is regulated,
By lowering the extendable handle (32) along the handle base (31) from the retracted position to the extended position, the second lock pawl (64) separates from the second lock recess (63), and the handle base (31) ) and the extension handle (32) are swingable about the handle support shaft (10). A moderation structure (66) is provided between the handle base (31) and the extendable handle (32) to engage and hold the extendable handle (32) in each of the retracted position and the extended position,
The moderation structure (66) includes a fixed moderation body (67) provided with a pair of elastic claws (68) provided on the handle base (31), and an upper and lower movable moderation body (69a) provided on the inner surface of the extension handle (32).・69b)
When the extension handle (32) is switched to the retracted position, the fixed moderation body (67) is engaged with the lower movable moderation body (69b), and the extension handle (32) is switched to the extension position. A strut according to any one of claims 1 to 5, in which the fixed detent body (67) is arranged to engage with the upper movable detent body (69a). The holding ring (9) includes a ring main body (28) having a C-shaped cross section and a pair of bracket parts (29) continuously protruding from the cylindrical peripheral end of the ring main body (28). It is made of aluminum die-cast molded product,
A handle holding structure (73) is provided between the bracket part (29) of the holding ring (9) and the lock handle (11), and the handle holding structure (73) receives the lock handle (11) switched to the unlocked position.
The handle holding structure (73) includes a stopper frame (74) fixed to the outer surface of the upper end of the handle base (31), and a holding protrusion (74) formed protrudingly on the arc circumferential surface of the bracket part (29) of the holding ring (9). 75).
Any one of claims 1 to 6, wherein the stopper frame (74) is provided with a stopper arm (76) that rides over the holding protrusion (75) while being elastically deformed along the arc circumferential surface of the bracket part (29). One of the tension-fixed supports mentioned above.

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