JP2022084149A - Platform fence - Google Patents

Abstract

To provide a technology which makes a bottom shutdown part of an elevation type platform fence as low as possible during full closing.SOLUTION: A platform fence 2 which moves N (N≥3) shutdown parts 6 built across support rods 4 vertically for opening or closing comprises stationary pillar sections 10 and an elevation part 20 vertically moving against the stationary pillar sections. The elevation part 20 is a mechanism part that is a linear connection of a plurality of links 31 and comprises an expansion link mechanism part 30 for every other joint part 32 to support the shutdown part 6 one by one, an upper fixing part 40 fixing the upper part of the expansion link mechanism part at a prescribed position, a vertical guidance part 50 guiding a vertical movement of the every other joint part 32, a pulley 60 fixed at a prescribed upper position and a linking belt 62 with one end fixed to the stationary pillar section 10 and the other end connected to the lower part of the expansion link mechanism part 30 via the pulley 60.SELECTED DRAWING: Figure 3

Description

The present invention relates to an elevating platform fence.

The platform fence that prevents passengers from falling from the platform of a railway station to the railroad track includes a so-called "elevating type" platform fence that opens and closes by raising and lowering a blocking part such as a rod or rope.

As the elevating platform fence, for example, the form shown in FIG. 2 of Patent Document 1 is known. Unlike the sliding door type home fence, the elevating type home fence does not require a door pocket to accommodate the blocking part (in the case of the sliding door type home fence, the movable door part is equivalent), so it opens and closes more than the sliding door type home fence. It can be wide. Therefore, the elevating platform fence can optimize the installation interval of the columns according to the platform length, vehicle length, number of vehicle doors, etc., compared to the sliding door type platform fence, and for the deviation of the train stop position. It is excellent in that it can respond flexibly.

Japanese Unexamined Patent Publication No. 2015-217737

In the form of FIG. 2 of Patent Document 1, when the spacing adjusting mechanism descends, the rope spacing increases in order from above, and when the spacing adjusting mechanism rises, the rope spacing decreases in order from below. Become. On the other hand, in the form of FIG. 5 of the same document, since it is a pantograph mechanism, the rope spacing is evenly expanded and contracted, resulting in a natural movement.

However, in the above two forms, since the operating surface of the link mechanism faces the home longitudinal direction, the lateral width of the elevating part (the width in the home longitudinal direction, and the width in the left-right direction when the track side is viewed from the home side). The opening and closing width of the home fence becomes smaller by that amount. In addition, the larger the width of the elevating part, the more likely it is that the conductor will get in the way when checking the state of the vicinity of the platform fence when the elevating part is raised.

Further, both the form of FIG. 2 and the form of FIG. 5 of the same document have a belt on a loop and two upper and lower pulleys for hanging the belt as a mechanism for raising and lowering the elevating part. Focusing on the lower pulley, it is necessary to secure a space for accommodating the lower pulley at the lower part of the elevating part. The bottom rope cannot be lowered to the bottom of the section. Therefore, there is a problem that a large gap exists between the rope at the bottom and the upper surface of the platform even when the elevating part is lowered. The rope position at the bottom in the fully closed state should be as low as possible to prevent children from slipping through and to make it easier for visually impaired people to check the rope position with a cane, and the gap between the rope at the bottom and the top of the platform should be small. desirable.

The first problem to be solved by the present invention is to provide a technique that makes it possible to make the lowermost cutoff portion as low as possible in an elevating home fence. Further, a second object is to provide a technique capable of making the width of the elevating part smaller than the conventional one.

The first invention for solving the above-mentioned problems is an elevating home fence that opens and closes by moving up and down the N (N ≧ 3) blocking portions passed between the columns, the fixed column portion and the above. The elevating part is provided with an elevating part that moves up and down with respect to the fixed pillar part, and the elevating part is a telescopic link mechanism part in which a plurality of links are linearly connected, and every other joint part of the blocking part is one. A telescopic link mechanism that supports each of the telescopic links, an upper fixing portion that fixes the upper part of the telescopic link mechanism at a predetermined position, and a vertical guide that guides the movement of every other joint portion in the vertical direction. In a home fence having a pulley fixed at an upper position of the be.

In the second aspect of the present invention, the elevating portion is provided on the track side of the fixed pillar portion, and the telescopic link mechanism portion is a surface on which the telescopic motion surface intersects in the longitudinal direction of the blocking portion, and every other portion thereof. The joint portion of is a home fence of the first invention, which is a joint portion located on the track side.

In the third aspect of the invention, the elevating portion moves up and down along a curved trajectory in which the elevating portion moves a predetermined joint portion from the lower end, which does not correspond to the every other joint portion, when the joint portion moves up and down the blocking portion. It is a home fence of the first or second invention which has a curved guide part which guides movably in a direction.

In the fourth aspect of the invention, every other joint portion is connected to a metal fitting into which the blocking portion is inserted, and the vertical guide portion has a groove portion for guiding the vertical movement of the metal fitting. The home fence according to any one of the first to third inventions, wherein the vertical movement of the metal fitting is guided to guide the vertical movement of every other joint portion.

In a fifth aspect of the invention, the elevating portion has an elevating belt stretched up and down on the fixed pillar portion side of the elevating portion, and the fixed pillar portion is positioned at a predetermined position to engage with the elevating belt. A home fence according to any one of the first to fourth inventions, which has a fixed drive pulley.

According to the embodiment of the present invention, the distance between the plurality of blocking portions in the vertical direction can be expanded or contracted by using the telescopic link mechanism portion in which the links are linearly connected. Due to its simple structure, it is lightweight yet highly reliable. Since the telescopic link mechanism connects all the blocking parts, it is difficult to move only some of the blocking parts, and in the fully closed state, some of the blocking parts are moved to pass through the home fence. It is difficult. In other words, it is highly safe as a guard rail.

In addition, the belt for expanding and contracting the telescopic link mechanism part is not a loop type, one end is fixed to the fixed pillar part, and the tensioning direction is reversed via a pulley fixed upward and connected to the link. There is. When a loop type belt is used as in the conventional case, a lower pulley is required at the lower part in the elevating part, but in this embodiment, the lower pulley is not required and there is a space in the lower part in the elevating part. That is, it is possible to obtain a degree of freedom in design in which the lower end of the telescopic link mechanism portion is arranged lower in the elevating portion than in the conventional case. Therefore, the lowermost cutoff portion can be configured to be as low as possible in the fully closed state.

Then, since the operating surface of the telescopic link mechanism portion intersects with the direction of the blocking portion (home longitudinal direction), the lateral width of the elevating portion (the width in the home longitudinal direction, which is the left-right direction when the track side is viewed from the home side). The width of) is narrower than before. Therefore, the opening / closing width of the home fence can be wider than before. In addition, it becomes easier for the conductor to check the situation near the platform fence when the elevating part is fully opened.

Focusing on the joint of the telescopic link mechanism, the joint connected to the cutoff portion of the joint of the telescopic link mechanism is guided to move in the vertical direction via the metal fittings. The vertical movement trajectory is fixed, and stable expansion and contraction of the expansion and contraction link mechanism is realized.

Further, the joint of the predetermined link from the lower end is guided by the curve guide portion along the curve trajectory through which the joint of the lower link passes when the mechanism portion is folded. Therefore, it is possible to prevent the joint of the link from bending backward during expansion and contraction, and a smooth and reliable operation is realized.

Further, focusing on the structure in which the elevating part is moved up and down with respect to the fixed pillar part, since this embodiment is a belt drive type, it is possible to realize reduction in manufacturing cost and weight reduction as compared with the case of the ball screw mechanism type.

A front view showing the fully closed state of the home fence as seen from the track side. Front view showing the fully open state of the home fence. It is a figure which shows the structural example of the column, and is the internal structure view of the side view seen from the longitudinal direction of the cutoff part in the fully closed state. It is a figure which shows the structural example of the column, and is the front view internal structure view seen from the track side in the fully closed state. A partially enlarged view of the lower part of the telescopic link mechanism portion of FIG. A side view internal structure diagram showing the state of the column in the intermediate state between the fully closed state and the fully open state. A side view internal structure diagram showing the state of the columns in the fully open state. A side view internal structure diagram showing a modified example of the configuration of the column.

Hereinafter, an example of the embodiment of the present invention will be described, but it goes without saying that the embodiment to which the present invention is applicable is not limited to the following embodiments.

FIG. 1 is a view of the platform fence 2 as viewed from the track side and is a front view showing a fully closed state. FIG. 2 is a front view showing a fully open state of the home fence 2. The home fence 2 is an elevating home fence that opens and closes by passing three or more blocking portions 6 between adjacent columns 4 (4a, 4b) erected on the platform 3 and moving them up and down. In these figures, only two columns 4 are shown, but in actual operation, two or more columns 4 are erected at the end of the station platform on the track side.

FIG. 3 is a diagram showing a configuration example of the support column 4, and is a side view internal structural view seen from the longitudinal direction of the blocking portion 6 in the fully closed state. FIG. 4 is a front view internal structure view seen from the track side.

The pillar 4 has a fixed pillar portion 10 fixed and erected on the platform 3, and an elevating portion 20 that moves up and down with respect to the fixed pillar portion 10. The elevating portion 20 is supported by a guide structure (not shown) so as to be movable in the vertical direction on the track side of the fixed pillar portion 10. The guide structure can be realized by, for example, a guide rail fixed to the fixed pillar portion 10 and a slider fixed to the elevating portion 20 and sliding in engagement with the guide rail.

The fixed pillar portion 10 includes an electric motor 12, a gear box 13, a drive pulley 14, two driven pulleys 15, and a control device 16 for driving and controlling the electric motor 12 inside a vertically long box-like frame 11. , Have. Further, a pillar-side belt fixing bracket 17 is provided so as to project on the upper track side of the skeleton 11.

The electric motor 12 has a function of counting the rotation speed of the output shaft and a braking function of maintaining the rotation of the output shaft in a stopped state.
The power of the electric motor 12 drives the drive pulley 14 via the gear box 13.
The two driven pulleys 15 are provided above and below the drive pulley 14, respectively. It is preferable that any one of the driven pulleys 15 is a tension pulley.

The drive pulley 14 and the two driven pulleys 15 engage with an elevating belt 22 (for example, a toothed belt) stretched linearly in the vertical direction on the home side side surface of the elevating portion 20.

One end of the elevating belt 22 is fixed to the surface of the elevating part 20 facing the fixed support column 10 at least above the driven pulley shaft 15, and the other end is at least below the driven pulley shaft 15. It is fixed to the surface facing the fixed support column portion 10.

In the example of FIG. 3, when the drive pulley 14 is rotated clockwise, the drive pulley 14 pulls up the elevating belt 22 relatively upward with respect to the fixed pillar portion 10. Since the elevating belt 22 is fixed to the elevating portion 20, the elevating portion 20 rises with respect to the fixed pillar portion 10. On the contrary, when the drive pulley 14 is rotated counterclockwise, the drive pulley 14 pulls down the elevating belt 22 relatively downward, and the elevating portion 20 descends with respect to the fixed pillar portion 10.

The elevating portion 20 includes a vertically long box-like case 21 and an elevating belt 22, and the case 21 includes a telescopic link mechanism portion 30, an upper fixing portion 40, a vertical guide portion 50, a pulley 60, and a link. It has a belt 62 and a belt 62 inside.

The telescopic link mechanism portion 30 is a telescopic mechanism that connects the cutoff portion 6 so as to be able to change the relative distance in the vertical direction. The telescopic link mechanism portion 30 arranges a plurality of straight links 31 (31a, 31b, ...) In a single line, and joins the ends of the adjacent links 31 with the joint portion 32 (coordinated in the axial direction). 32a, 32b, ...) Are connected so as to be rotatable around the axis. Then, the telescopic link mechanism portion 30 expands and contracts as a whole of the telescopic link mechanism portion 30 by rotating and bending / extending the adjacent links 31 at the joint portion 32. Although the number of links 31 is illustrated as eight and the number of joints 32 is nine, the number of links and the number of joints are not limited to this and can be changed as appropriate.

In the telescopic link mechanism portion 30, the links 31 are vertically connected and the axis of the joint portion 32 is the longitudinal direction of the blocking portion 6 (the home longitudinal direction, and the left-right direction when the track side is viewed from the home side (home fence 2). (Left and right direction)) is arranged so as to face. Focusing on the telescopic movement surface 9 in which the telescopic link mechanism portion 30 expands and contracts, the telescopic link mechanism portion 30 is a surface where the telescopic movement surface 9 intersects in the longitudinal direction of the blocking portion 6, and is up and down in the front-rear direction of the home fence 2. It is arranged close to the track side in the case 21 so as to be a surface defined by the direction.

Specifically, the telescopic link mechanism portion 30 is arranged so that the odd-numbered joint portion 32 of the joint portions 32 is on the track side and the even-numbered joint portion 32 is on the home side. Then, the cutoff portion 6 is connected to the odd-numbered joint portion 32. Therefore, the telescopic link mechanism portion 30 is a foldable telescopic mechanism portion in which a plurality of links 31 are linearly connected and the cutoff portion 6 is supported by every other joint portion 32 one by one.

The first joint portion 32a counted from the top is fixed to the case 21 at a predetermined position on the upper portion of the case 21 by the upper fixing portion 40 so as not to move. That is, the first joint portion 32a is a fixed joint portion.

The third and subsequent odd-numbered joint portions 32, that is, the third joint portion 32c, the fifth joint portion 32e, the seventh joint portion 32g, and the ninth joint portion 32j are, for example, As shown in FIG. 5 (enlarged partial view of the lower part of the telescopic link mechanism portion 30 in FIG. 4), (1) a shaft portion 33 which is a rotation axis of two links 31 connected by the joint portion 32, and ( 2) It has a connection fitting 34 connected to the cutoff portion 6, and (3) a guide fitting 35 that is engaged with and guided by a vertical guide portion 50 provided on the side surface of the case 21 in the vertical direction. ..

The shaft portion 33 is configured so that the shaft portion 33 can rotate around the joint portion 32 to be connected.
The connection fitting 34 is connected to the blocking portion 6 by caulking, gluing, clipping, screwing, or the like.

The guide fitting 35 is a pulley that rotates around the shaft of the shaft portion 33 and rotates in contact with the groove of the vertical guide portion 50. The shaft portion 33 and the guide fitting 35 are unevenly fitted and fixed by screwing, press fitting, or the like. Then, the guide fitting 35 is engaged with the vertical guide portion 50 (see FIGS. 3 and 4) to be guided. The vertical guide portion 50 is a vertically long groove hole provided on the side surface of the case 21, or a rail member with a groove fixed to the inner side surface of the case 21.

In the third, fifth, seventh, and ninth joint portions 32 counted from the top, the guide fitting 35 and the vertical guide portion 50 guide the linear movement in the vertical direction, and the ascending / descending locus of the blocking portion 6 is constant. Is kept in. Further, by these guide mechanisms, the telescopic link mechanism portion 30 is prevented from rotating around the upper fixing portion 40 so that the entire telescopic link mechanism portion 30 does not rotate (does not swing) in the front-rear direction when the telescopic link mechanism portion 30 expands and contracts. ing.

Of the even-numbered joint portions 32 counted from the top, the second joint portion 32b, the fourth joint portion 32d, and the sixth joint portion 32f have a shaft portion 33, but the connection fitting 34 and the guide fitting. 35 does not have. That is, these joint portions 32 are freely movable joints that do not engage with the cutoff portion 6 or the vertical guide portion 50 and can move only in the connection relationship with the link 31.

Of the even-numbered joint portions 32 counted from the top, the eighth joint portion 32h is vertically located on the shaft portion 33 and the side surface of the case 21 (the side surface behind the position where the vertical guide portion 50 is provided). It has a guide fitting 38 that is engaged with and guided by a curved guide portion 58 (see FIG. 3) provided.

The guide fitting 38 is realized as, for example, a pulley that rotates on the shaft of the shaft portion 33, and is guided by engaging with the curved guide portion 58 (see FIG. 3).

The curve guide portion 58 is realized by a vertically long groove hole provided on the side surface of the case 21 or a rail member with a groove fixed to the inner side surface of the case 21. The curve guide portion 58 curves along the curved trajectory that moves the eighth joint portion 32h (the predetermined joint portion from the lower end that does not correspond to every other joint portion 32) when the cutoff portion 6 is moved up and down. It guides you freely in the vertical direction. In the curved orbit, the downward extension direction is the direction toward the lower corner portion near the orbit of the case 21, and the upward extension direction is the direction toward the upper corner portion near the home. A convex curve is drawn diagonally downward on the home side.

The pulley 60 has a rotation axis facing the longitudinal direction of the cutoff portion 6, is fixed to the case 21 at an upper position in the case 21, and a link belt 62 is hung around the pulley 60.

The link belt 62 is, for example, a toothed belt cut out to a predetermined length, one end of which is fixed to the pillar-side belt fixing bracket 17 of the fixed pillar portion 10, and the other end of which is a telescopic link mechanism via a pulley 60. It is connected to the lower part of the portion 30 (the first link 31 from the bottom) by the link side belt fixing bracket 36.

Next, the operation of the home fence 2 will be described.
The fully closed home fence 2 is in the state shown in FIG. To open the home fence 2, the control device 16 releases the brake of the electric motor 12 and drives the drive pulley 14 to rotate clockwise toward FIG. Then, the elevating belt 22 is pulled up, and the elevating portion 20 starts to rise relative to the fixed pillar portion 10.

Here, focusing on the pulley 60 and the pillar-side belt fixing bracket 17, the pulley 60 rises with respect to the pillar-side belt fixing bracket 17 as the elevating portion 20 rises with respect to the fixed pillar portion 10. Along with this, the distance between the pulley 60 and the pillar-side belt fixing bracket 17 increases, but since the total length of the link belt 62 is constant, as a result, the portion from the pulley 60 of the link belt 62 to the link-side belt fixing bracket 36 Will be raised. Therefore, the lower end side link (link 31h) having the link side belt fixing bracket 36 is pulled up.

Then, since the joint portion 32j on one end side (track side) of the lower end side link (link 31h) having the link side belt fixing bracket 36 is engaged with the vertical guide portion 50, it tends to rise straight up. However, since the joint portion 32h on the other end side (home side) of the link is engaged with the curve guide portion 58, it rises diagonally upward on the home side. As a result, the link 31h having the link-side belt fixing bracket 36 changes to a posture closer to lying down than in the state shown in FIG.

Such movement and posture change of the joint portion 32h narrows the relative angle between the link 31h having the link-side belt fixing bracket 36 and the link 31g one above the link 31h, and triggers the shortening of the entire telescopic link mechanism portion 30. Moreover, even if the link 31h is pulled up by the link belt 62, the joint portion 32h does not become a reverse joint state in which the joint portion 32h is bent toward the track side, and the telescopic link mechanism portion 30 can be smoothly folded and shortened.

As the elevating portion 20 continues to rise, the telescopic link mechanism portion 30 also progresses to be folded, and the blocking portion 6 is also lifted accordingly, and eventually the vertical distance between the blocking portions 6 becomes smaller and the state shown in FIG. 6 is reached. When the ascent continues, the control device 16 eventually detects that the rotation angle from the start of driving of the electric motor 12 has reached a predetermined value, stops the rotation of the electric motor 12, operates the brake, and changes the state. When maintained, the home fence 2 shown in FIG. 7 is fully opened.

When the control device 16 releases the brake from the state shown in FIG. 7 and drives the electric motor 12 so as to rotate the drive pulley 14 counterclockwise, the drive pulley 14 raises the elevating belt 22 relative to the fixed pillar portion 10. Pull it down. As a result, the distance from the pulley 60 to the pillar-side belt fixing bracket 17 becomes short, and the distance from the pulley 60 to the link-side belt fixing bracket 36 becomes relatively long. That is, the link-side belt fixing bracket 36 descends with respect to the pulley 60, the telescopic link mechanism portion 30 extends, and the vertical distance between the blocking portions 6 increases.

The home fence 2 returns to the state of FIG. 3 after passing through the state of FIG. By this time, the rotation angle of the electric motor 12 returns to that at the start of driving, so that the control device 16 puts the brake in a fully braking state to fix and maintain the state of the electric motor 12.

As described above, according to the home fence 2, the distance between the plurality of blocking portions 6 in the vertical direction can be expanded or contracted by using the telescopic link mechanism portion 30 in which the links 31 are linearly connected. Due to its simple structure, it is lightweight yet highly reliable. Since the telescopic link mechanism portion 30 connects all the cutoff portions 6, it is difficult to move only a part of the cutoff portions 6, and the home is moved by moving a part of the cutoff portions 6 in the fully closed state. It is difficult to get through the fence 2. In other words, it is highly safe as a guard rail.

Further, the link belt 62 for expanding and contracting the telescopic link mechanism portion 30 is not a loop type, one end thereof is fixed to the fixed pillar portion 10, and the stretching direction is reversed via the pulley 60 fixed upward. Is connected to the link 31. When a loop type belt is used as in the conventional case, a lower pulley is required in the lower part of the elevating part 20, but the home fence 2 of the present embodiment does not require the lower pulley and a space is required in the lower part of the elevating part 20. I can afford it. That is, a degree of freedom in design is obtained in which the lower end of the telescopic link mechanism portion 30 is arranged lower in the elevating portion 20 than in the conventional case. Therefore, the lowermost cutoff portion 6 can be configured to be as low as possible in the fully closed state.

Then, since the telescopic motion surface 9 of the telescopic link mechanism portion 30 intersects the direction of the blocking portion 6 (home longitudinal direction), the lateral width of the elevating portion 20 (the width in the home longitudinal direction, and the track side is viewed from the home side). The width in the left-right direction at the time) is narrower than the conventional home fence. Therefore, the opening / closing width of the home fence 2 can be made wider than before. In addition, it becomes easier for the conductor to check the state of the vicinity of the home fence 2 when the elevating portion 20 is fully opened.

Focusing on the joint portion 32 of the telescopic link mechanism portion 30, the joint portion 32 connected to the cutoff portion 6 of the joint portions 32 engages with the vertical guide portion 50 via the guide fitting 35 in the vertical direction. Since the movement of the joint is guided, the vertical movement locus of the joint at the time of expansion and contraction is fixed, and stable expansion and contraction of the expansion and contraction link mechanism portion 30 is realized.

Further, since the shaft portion 33 of the joint portion 32 is a shaft that can rotate with respect to the link 31, the cutoff portion 6 connected to the joint portion 32 twists as the telescopic link mechanism portion 30 expands and contracts. It does not roll or roll.

Further, the joint of the predetermined link from the lower end is guided by the curve guide portion 58 along the curve locus through which the joint of the lower link passes when the mechanism portion is folded. Therefore, the joint of the link during expansion and contraction is prevented from being bent in the reverse direction, and the smooth and reliable operation of the expansion and contraction link mechanism portion 30 is realized.

Further, focusing on the structure in which the elevating portion 20 is moved up and down with respect to the fixed pillar portion 10, since the home fence 2 of the present embodiment is a belt drive type, it is possible to realize reduction in manufacturing cost and weight reduction as compared with the case of the ball screw mechanism type. ..

[Modification example]
The embodiment to which the present invention is applicable is not limited to the above embodiment, and components can be added, omitted, or changed as appropriate.

For example, as in the support column 4X shown in FIG. 8, all the joint portions 32 (32b, 32d, 32f, 32h) on the home side are engaged with the curve guide portion 58X in the same manner as the joint portion 32h of the above embodiment. May be provided. In this case, when the telescopic link mechanism portion 30 expands and contracts, the distance between the joint portions 32 on the track side approaches / separates substantially equally, so that the distance between the cutoff portions 6 seems to be evenly reduced / expanded. Become.

Further, a spring member (for example, a whiskers spring) may be interposed between the adjacent links 31 so as to urge them to open with the joint portion 32 between them as a fulcrum.

2 ... Home fence 3 ... Platform 4 ... Pillar 6 ... Blocking part 9 ... Telescopic motion surface 10 ... Fixed pillar part 11 ... Frame 12 ... Electric motor 13 ... Gearbox 14 ... Drive pulley 15 ... Driven pulley 16 ... Control device 17 ... Pillar Side belt fixing bracket 20 ... Elevating part 21 ... Case 22 ... Elevating belt 30 ... Telescopic link mechanism part 31 ... Link 32 ... Joint part 33 ... Shaft part 34 ... Connection metal fitting 35 ... Guide metal fitting 36 ... Link side belt fixing metal fitting 38 ... Guide Metal fittings 40 ... Upper fixing part 50 ... Vertical guide part 58 ... Curved guide part 60 ... Pulley 62 ... Link belt

Claims (5)

It is an elevating platform fence that opens and closes by moving the blocking part of N (N ≧ 3) passed between the columns up and down.
Fixed pillar part and
An elevating part that moves up and down with respect to the fixed pillar part,
Equipped with
The elevating part
An expansion / contraction link mechanism unit in which a plurality of links are linearly connected, and an expansion / contraction link mechanism unit in which every other joint portion supports the blocking portion one by one.
An upper fixing part that fixes the upper part of the telescopic link mechanism part at a predetermined position,
A vertical guide section that guides the vertical movement of every other joint section, and a vertical guide section.
A pulley fixed in a predetermined upper position,
A belt having one end fixed to the fixed pillar portion and the other end connected to the lower portion of the telescopic link mechanism portion via the pulley.
Have,
Home fence. The elevating part is provided on the track side of the fixed pillar part, and is provided.
The telescopic link mechanism portion is a surface on which the telescopic movement surfaces intersect in the longitudinal direction of the blocking portion.
The every other joint portion is a joint portion located on the track side.
The home fence according to claim 1. The elevating part
A curved guide portion that movably guides a predetermined joint portion from the lower end that does not correspond to every other joint portion in the vertical direction along a curved trajectory that the joint portion moves when moving the blocking portion up and down.
Have,
The home fence according to claim 1 or 2. Every other joint portion is connected to a metal fitting into which the cutoff portion is inserted.
The vertical guide portion has a groove portion that guides the vertical movement of the metal fitting, and guides the vertical movement of the metal fitting to guide the vertical movement of every other joint portion. ,
The home fence according to any one of claims 1 to 3. The elevating portion has an elevating belt, which is vertically stretched on the fixed pillar portion side of the elevating portion.
The fixed pillar portion has a drive pulley fixed in a predetermined position to engage with the elevating belt.
The home fence according to any one of claims 1 to 4.

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