JP2598532Y2 - Fall prevention device for telescopic gate - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing a telescopic gate from overturning.

[0002]

2. Description of the Related Art Conventionally, a telescopic gate is provided with a drop-rod type in order to prevent the gate main body from swaying or overturning due to wind pressure due to a strong wind or other external force when the gate body is extended and an entrance is closed. A fall prevention device is provided.

[0003] The conventional drop-bar type fall prevention device is as follows.
After closing the doorway by extending the gate body, drop the drop rod downward, insert it into the drop hole provided on the telescopic path of the gate body on the ground side, lock it, and shrink the gate body and open it Occasionally, the drop bar is pulled up and pulled out of the drop hole to release the lock.

[0004]

However, the conventional fall prevention device requires that the drop bar be manually engaged and disengaged after the gate body is extended or contracted, and the operation is troublesome and troublesome. There's a problem.

Accordingly, the present applicant has already proposed a fall prevention device which can be easily operated simply by expanding and contracting the gate body along the expansion and contraction path (Japanese Utility Model Application No. 575771).
. In this fall prevention device, an engagement tool having an engagement projection at a lower end portion is attached to a lower portion of the gate main body, and is engaged when the gate main body is extended and closed in a telescopic path of the gate main body on the ground side. An engagement receiver is provided which has an engagement portion with which the engagement protrusion of the tool engages and which engages and disengages when the gate body expands and contracts.

However, in this overturn prevention device, in a horizontal link type telescopic gate in which each link bends around the vertical axis and expands and contracts, each link rotates around the vertical axis during expansion and contraction. The joint also rotates about the longitudinal axis at the same time as the link, and there is a problem that the engaging tool cannot be smoothly disengaged from the engaging receiver.

[0007] This is because the engaging member is formed by bending a plate material or the like, and when the engaging member is disengaged from the engaging receiving member on the ground side, it is necessary to make the width direction of the plate coincide with the direction of the expansion / contraction path of the gate body. Nevertheless, if the engagement tool rotates about the longitudinal axis with the link, the width direction of the engagement tool will not match the direction of the expansion / contraction path.

In view of such a problem, the present invention makes it possible to smoothly engage and disengage with the engagement receiving member even when the engaging member rotates about the vertical axis when the gate body expands and contracts. It is an object of the present invention to provide a telescopic gate overturn prevention device which can be very easily operated.

[0009]

[Means for Solving the Problems] The present invention relates to a suspension-side support 3
A gate body 6 is provided between the door body 6 and the door stop side column 4 so as to be able to freely expand and contract, and an engagement member 37 is provided at a lower portion in the middle of the gate body 6 in the expansion and contraction direction. When the gate 37 is detachable and the gate body 6 is extended to the closed state, the engaging receiving member 38 engaged with the engaging member 37 corresponds to the hanging member The telescopic gate is provided on the ground 5 side in the middle between the door stop side support 4 and the door stop side support 4. In addition to disposing one tool 37, the one engaging tool 37 is mounted on the gate body 6 so as to be adjustable up and down, and the engagement receiving tool 38 is placed on the telescopic path a of the gate body 6 in one position. And the one engagement receiver 38
In addition, a pair of front and rear engaging portions 49 are provided in which the engaging projections 40 of the one engaging tool 37 are engaged on both front and rear sides, respectively.

[0010]

When the doorway 2 is opened and closed, the gate body 6 is extended and retracted.
Stretch along. When the gate body 6 is extended to close the entrance 2, the engagement projection 40 of the engagement tool 37 engages with the engagement portion 49 of the engagement receiving tool 38, and when the gate is contracted and opened, the engagement The engagement projection 40 of the tool 37 is separated from the engagement portion 49 of the engagement receiver 38. For this reason, when opening and closing, the engagement tool 37 is
No special operation for disengaging is required.

Since the engaging member 37 has a structure in which an engaging projection 40 is provided on the outer periphery of the lower end of the bar portion 39 in the vertical direction, when the gate main body 6 is expanded and contracted, the engaging member 37 is moved around the axis of the rod portion 39. , The engaging tool 37 moves linearly along the telescopic path a while rotating, and smoothly engages and disengages with the engaging receiver 38 on the ground 5 side.

In a state where the gate body 6 is extended and the entrance 2 is closed, the engaging projections 40 of the engaging members 37 are engaged with the engaging portions 49 of the engaging receiving members 38, so that the lateral swing of the gate body 6 is achieved. , To prevent falls. At the time of construction, after installing the engagement receiver 38 on the ground 5 side,
The engaging tool 37 is adjusted up and down, and the engaging projection 40 is
The 38 engagement portions 40 are made to coincide with each other. For this reason, precision is not required for the installation height of the engagement receiver 38 at the time of construction.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 7 illustrate a first embodiment of the present invention.
6 and 7 show a horizontal link type telescopic gate. 1 is a fence, 2 is an entrance. 3 is a hanging side support, 4 is a door stop side support, and these supports 3 and 4 are inside the fence 1 inside the entrance 2
Are erected on the ground 5 on both left and right sides.

Numeral 6 denotes a horizontal link type gate body which is configured to be extendable and contractible, and is provided between the hanging column 3 and the door stop column 4 so as to open and close the entrance 2. The gate body 6 includes a plurality of pairs of upper and lower outer links 7 horizontally arranged at both upper and lower ends, and a pair of upper and lower inner links 8 horizontally arranged inside the outer links 7 in a telescopic direction. Each inner link 8 is fixed between upper and lower ends of a pair of right and left vertical bars 9.

As shown in FIGS. 2 and 3, the middle outer link 7 has bent portions 7 which are bent to the left and right ends in opposite directions.
a, 7b, and the outer link 7 on the hanging end side is a bent portion 7a.
The outer link 7 on the door stop end side has a bent portion 7b. On the other hand, the middle inner link 8 has bent portions 8a, 8b bent in the opposite direction to the bent portions 7a, 7b of the outer link 7, and the inner link 8 on the hanging end side has the bent portion 8a, Each of the inner links 8 on the contact end side has a bent portion 8b.

The upper and lower pair of outer links 7 and inner links 8 of each pair are pivotally mounted at the center in the longitudinal direction so as to be relatively rotatable crosswise by a vertical pivot 10. Further, the outer link 7 and the inner link 8 of each adjacent pair are formed such that the bent portions 7a, 8b, 7b, 8a on the opposite end sides thereof are connected to each other by a vertical connecting shaft 11a.
They are refractively connected by a and 11b.

Outer link 7 and inner link 8 on the hanging end side
Is rotatably connected to the suspension column 3 via the suspension mounting shaft 12 and the mounting arm 13. The outer link 7 and the inner link 8 on the door stop end side are pivotally connected by a pivot 14, and a locking frame 16 is provided between the pair of upper and lower inner links 8 via a terminal frame 15. The locking frame 16 has a handle 17 for opening and closing, and when the gate body 6 is extended to be closed, the locking frame 16 comes into contact with a locking receiving frame 19 mounted on the door stop side support 4 via the mounting arm 18. , Can be locked by a locking device (not shown). In addition, 20 is a crosspiece for a lattice.

Reference numeral 21 denotes caster wheels for supporting the gate body 6, which are attached to the front and rear ends of each of the caster holders 22 provided at two places, a lower center part of the gate body 6 and a lower part near the door stop end. . As shown in FIGS. 1 to 3, the caster holder 22 includes an upper arm portion 23 and a lower arm portion 24 which are disposed on the upper and lower sides of the lower outer link 7 in the front-rear direction.
Each of the arm portions 23, 24
Is pivotally supported by a pivot 10 that pivotally supports the outer link 7 and the inner link 8.

The caster holder 22 is restrained from swinging by the anti-shake mechanism 25 so that the caster holder 22 always keeps a posture in the front-rear direction substantially perpendicular to the direction of expansion and contraction even when the gate body 6 expands and contracts. The anti-vibration mechanism 25 includes a pair of front and rear long holes 26 formed in the upper arm portion 23 of the caster holder 22, a sliding pin 27 slidably inserted into each long hole 26, one end of the outer link 7 and the inside of the inner link 7. A pair of front and rear links 32,33,34,3 which are pivotally connected to the link 8 by pivot pins 28,29,30,31 and the other end of which is connected to the slide pins 27, respectively.
And 5.

Reference numeral 36 denotes a fall prevention device, as shown in FIGS. 1 to 3, a single engagement member attached to the center lower part of the gate body 6 in the direction of expansion and contraction and substantially at the center between a pair of front and rear caster wheels 21. 37 and one engagement provided on the telescopic path a of the gate body 6 on the ground 5 side so as to correspond to the engagement tool 37 up and down when the gate body 6 is extended and the doorway 2 is closed. Holder 38
It is composed of

As shown in FIGS. 4 and 5, the engagement member 37 is
It includes a vertical bar 39 formed of a screw shaft, and a disk-shaped engaging projection 40 fixed to the lower end of the bar 39 at the center position. Therefore, the engagement tool 37 is provided with an engagement projection 40 on the outer periphery of the lower end of the rod 39 concentrically with the rod 39.

The bar 39 of the engagement member 37 is provided with a vertical support cylinder 41.
The female screw hole 42 is screwed into the female screw hole 42 from below so as to be vertically adjustable, and is fixed by a spring washer 43 and a lock nut 44. Support tube
41 is screwed into a male screw part 45 integrally formed so as to protrude downward from the lower end of the pivot 10. A flat washer 46 and a spring washer 47 for receiving the lower arm 24 of the caster holder 22 are interposed between the upper end of the support cylinder 41 and the lower end of the pivot 10.

The engagement receiving member 38 has a circular shape in a plan view in which the upper surface is flattened and bulged in a spherical shape.
A groove-shaped recess 48 is formed along
A pair of engaging portions 49 are formed on both front and rear sides of the pair. When the gate body 6 is extended to close the entrance 2, the rod-shaped portion 39 of the engagement tool 37 enters the recess 48 of the engagement receiver 38, and the front and rear sides of the engagement projection 40 at the lower end thereof form a pair of front and rear. Are engaged with the respective engaging portions 49 in a detachable manner to prevent the gate body 6 from falling down in the front-rear direction. In addition, this engagement receiving member 38 is provided by a mounting screw 51 inserted into the mounting hole 50.
It is fixed to an anchor cylinder 52 embedded on the ground 5 side.

Next, the operation of opening and closing the telescopic gate with the overturn prevention device 36 will be described. When the entrance 2 is opened, the gate body 6 is in a contracted state in the vicinity of the hanging-side column 3 as shown by a two-dot chain line in FIG. When closing the doorway 2, hold the handle 17 of the locking frame 16 and
To the lock receiving frame 19. Then, the caster wheels 21 roll on the ground 5 and the gate body 6 sequentially extends along the telescopic path a.

When the gate body 6 extends to the maximum state, the rod-shaped portion 39 of the engaging member 37 enters the concave portion 48 of the engaging receiving member 38, and the front and rear sides of the engaging projection 40 at the lower end thereof form a pair of engaging members. Joint
After entering and engaging the lower side of 49, the locking frame 16 comes into contact with the locking receiving frame 19 and is locked by the locking device.

When the gate body 6 is extended, the outer link 7 and the inner link 8 rotate in opposite directions about the pivot 10 and change from the crossed state to the parallel state. And
When the gate body 6 is in the maximum extension state, both are parallel, and FIG.
As shown by a solid line in FIG.

When the outer link 7 and the inner link 8 rotate around the pivot 10, the pivot 10 to which the engaging member 37 is attached rotates around the axis thereof together with one of the links 7, 8. When the pivot 10 rotates, the engaging member 37 fixed thereto also rotates integrally.

However, since the engagement member 37 has a structure in which the circular engagement projection 40 is provided on the outer periphery of the lower end of the rod-shaped portion 39, the engagement member 37 only rotates around the axis of the rod-shaped portion 39 integrally with the pivot 10. Therefore, when viewed as a whole, it moves linearly while rotating on the telescopic path a. For this reason, the rod-shaped portion 39 of the engagement tool 37 is
, And smoothly engages with the pair of engaging portions 49 at the lower end thereof.

Therefore, simply by extending the gate body 6 along the telescopic path a, the engaging projections 40 of the engaging members 37 are engaged with the engaging receiving members 38.
Not only can it be easily operated by engaging with the engaging portion 49 of, but even though the engaging member 37 is rotated around the vertical axis, it can be smoothly and smoothly Can be engaged.

When the doorway 2 is closed, the engagement projections 40 of the engagement members 37 engage with the pair of engagement portions 49 of the engagement receiving member 38 from below, so that the front and rear directions with respect to the gate body 6 can be improved. Even if wind pressure or other external force due to strong wind acts on the
Since the gate 40 is hooked and locked to one of the pair of engagement portions 49 of the engagement receiving member 38, it is possible to prevent the gate body 6 from swaying or falling. In particular, the engagement tool 37 is located substantially at the center of the gate body 6 in the front-rear direction, and the engagement receiving tool 38 is located on the telescopic path a of the gate body 6. Since it is structured to engage with a pair of front and rear engaging portions 49 of the engagement receiving member 38, respectively, only one engaging member 37 and one engaging receiving member 38 are provided, so that the front-rear direction of the intermediate portion of the gate body 6 can be improved. Can be prevented and the structure can be simplified.

When opening the entrance 2 by contracting the gate body 6, when the user pulls the handle 17 toward the hanging-side column 3, the gate body 6 contracts. At this time, the engagement tool 37
Rotates around the center of the vertical axis.
Can be easily and smoothly removed from the engagement receiving member 38.

Since the engagement receiving member 38 has a flat spherical upper surface, the amount of protrusion from the ground 5 can be reduced. In particular, when the gate body 6 is expanded and contracted, even if the caster wheel 21 on the door stop side slightly deviates in the front-rear direction from the expansion / contraction path a and interferes with the engagement receiver 38, it can be easily moved on the engagement receiver 38. It can pass through, and the engagement receiver 38 does not interfere.

The engaging member 37 is formed so that the rod-shaped portion 39 is formed into a female screw hole of the support cylinder 41.
Since it is screwed up and down freely to 42, if there is a difference in the gap between the lower end of the gate body 6 and the ground 5, the engaging tool 37 is adjusted up and down after the construction, What is necessary is just to match the mating projection 40 with the engaging part 49 of the engagement receiving member 38. Therefore, the mounting height of the engagement receiver 38 is not required to be high during the construction, and the work at the time of the construction can be easily performed. Moreover, the engaging member 37 is located substantially at the center of the gate body 6 in the front-rear direction, and the front and rear sides of the engaging projection 40 at the lower end of the engaging member 37 are paired with the front and rear engaging portions 49 of the engaging receiver 38.
Are engaged with each other to prevent falling in the front-rear direction.
And the height relationship between the pair of front and rear engagement portions 49 of the engagement receiver 38 can be adjusted, and the operation at the time of adjustment is very easy.

FIGS. 8 to 11 show a second embodiment of the present invention, in which the caster wheels 21 and the engaging members 37 are arranged apart from each other in the direction in which the gate body 6 expands and contracts. That is, as shown in FIGS. 8 to 11, each of the bent portions 7a, 7b, 8a, 8b of the outer link 7 and the inner link 8 is formed in a plate shape, and each of the bent portions
Shaft insertion portions 56a, 56b, 57a, 57b for supporting the connection shafts 11a, 11b are formed at the tips of 7a, 7b, 8a, 8b.

Castor holders 58a, 58b are integrally provided at the bent portions 7a, 7b at the mounting positions of the caster wheels 21 so as to protrude outward in the front-rear direction from the shaft insertion portions 56a, 56b. A pair of front and rear caster wheels 21 are attached to the tips of the holders 58a, 58b. Therefore, the front and rear caster wheels 21 are independent, and the caster holders 58a and 58b rotate around the pivot 10 integrally with the outer link 7 when the gate body 6 expands and contracts.

The pivot 10 at the intersection of the outer link 7 and the inner link 8 is cylindrical and has a female screw hole 59 on the inner surface. Each pivot 10 is fixed to the inner link 8 by a bolt 60 screwed into a female screw hole 59. Caster holder
The pivot 10 of the outer link 7 having 58a
7, projecting slightly downward through the lower end thereof, and the rod-shaped portion 39 of the engaging tool 37 is screwed to the lower end side thereof and fixed by a spring washer 43 and a lock nut 44. Therefore, this axis
Reference numeral 10 also serves as the support cylinder 41 of the first embodiment.

In this embodiment, since the pivot 10 is fixed to the inner link 8 by the bolt 60, the pivot 10 always rotates integrally with the inner link 8 when the gate body 6 expands and contracts. However, the engagement tool 37 is located at the intersection of the outer link 7 and the inner link 8, and is composed of a rod 39 and an engagement projection 40 provided concentrically at the lower end thereof as in the first embodiment. Therefore, even when the engagement member 37 rotates integrally with the inner link 8 via the pivot 10 when the gate body 6 expands and contracts, it only needs to move linearly while rotating on the expansion path a. Yes, engagement projection
40 smoothly engages with the engagement receiver 38.

Although the caster wheel 21 and the engaging member 37 are separated from each other in the direction of expansion and contraction of the gate body 6, the caster holder
Since the engaging member 37 is provided on the pivot 10 of the outer link 7 having 58a, the engaging protrusion 40 engages with the engaging portion 49 of the engaging receiving member 38 to prevent the gate body 6 from tipping over. In addition, no abnormal bending force acts on the gate body 6 downward. Incidentally, the engagement member 37 may be provided on the pivot 10 of the outer link 7 having the caster holder 58b.

FIGS. 12 and 13 show a third embodiment of the present invention, in which the present invention is applied to a vertical link type telescopic gate which is configured to be able to bend around a horizontal axis and expand and contract. In the case of this vertical link type telescopic gate, since the gate body 6 has the vertical bar 53 formed in an inverted U-shape, a mounting bracket is provided at the lower end thereof.
If the mounting cylinder 54 is mounted and the support cylinder 41 is fixed to the mounting bracket 54 with the bolts 55, the engaging tool 37 can be mounted in the same manner.

The present invention can be similarly applied to telescopic gates other than the horizontal link type or the vertical link type. In the case of FIG. 13, the rod-shaped portion 39 is vertically inserted into the hole of the mounting bracket 54, and the mounting bracket 54 is vertically The engagement member 37 may be fixed by sandwiching it.

It is sufficient that the bar 39 of the engagement tool 37 is a bar in the up and down direction. In addition to a round bar, a solid outer bar, a hollow pipe, or the like can be used. For example, when the rod 39 of the engaging tool 37 is formed of a pipe, as illustrated in FIG. 14 as a fourth embodiment, an internal thread 60 is formed on the inner periphery of the rod 39, and The support cylinder 41 or an external thread 61 formed on the outer periphery of the pivot 10 may be screwed up and down so as to be adjustable up and down, and fixed with a lock nut 62. If the pipe-shaped rod 39 is screwed onto the pivot 10, the pivot 10 in FIG. 14 may be solid.

The engagement protrusion 40 of the engagement member 37 is most preferably a disk concentric with the rod 39, but is not limited thereto.
An elliptical shape close to a circle may be used, or a triangular shape, a quadrangular shape, or the like in which the corners are curved in an arc shape may be used.

[0043]

According to the present invention, one engagement tool 37 having an engagement projection 40 on the outer periphery at the lower end is arranged at substantially the center of the lower part of the gate body 6 in the front-rear direction, and the one engagement The fitting 37 is mounted on the gate body 6 so as to be vertically adjustable, and one engagement receiver 38 is provided on the telescopic path a of the gate body 6, and one engagement receiver 38 is attached to the one engagement receiver 38. Since the engagement projections 40 of the fitting 37 are provided with a pair of front and rear engagement portions 49 to be engaged on both front and rear sides thereof, the engagement tool 37 rotates around the vertical axis when the gate body 6 expands and contracts. Even in such a case, the engagement tool 37 can be smoothly engaged and disengaged from the engagement receiver 38, and can be operated extremely easily.

The engaging member 37 and the engaging receiving member 38 are connected to the gate body.
Not only is it provided correspondingly in the middle of the stretching direction of 6, but also
Since one engagement tool 37 is provided substantially at the center of the lower part of the gate body 6 in the front-rear direction, and one engagement receiver 38 is provided on the telescopic path a of the gate body 6, the engagement tool 37 is provided in the front-rear direction. The structure of the entire gate including the engaging tool 37 and the engaging receiving tool 38 is simpler and smaller than in the case where a plurality of the receiving tools are provided or the engaging receiving tool 38 is provided long in the direction of expansion and contraction of the gate body 6. Thus, the manufacturing cost can be reduced, and there is no problem that the appearance of the entire gate is impaired by the engagement tool 37 and the engagement receiver 38, and the engagement receiver 38 is not in the way. In addition, the engagement member 37 and the engagement receiving member 38 are substantially at the center in the front-rear direction, and the engagement projections 40 on the outer periphery of the lower end of the engagement member 37 are engaged with the pair of front and rear engagement members of the engagement receiving member 38 on both front and rear sides. Because each is engaged with the part 49,
Although the number of the engaging member 37 and the engagement receiving member 38 is one, the gate body 6 is formed by the engaging member 37 and the engagement receiving member 38.
Can be prevented from falling on both sides in the front-rear direction of the middle part of the vehicle. Further, since the engaging tool 37 is provided at the lower part of the gate body 6 so as to be vertically adjustable, there is an advantage that the installation height of the engaging tool 38 is not required to be high and the work at the time of construction can be performed extremely easily. In particular, the engaging member 37 is located substantially at the center of the gate body 6 in the front-rear direction, and the front and rear sides of the engaging protrusion 40 at the lower end of the engaging member 37 are respectively engaged with a pair of front and rear engaging portions 49 of the engaging receiver 38. Since the engaging body 37 is engaged to prevent the gate body 6 from falling down in the front-rear direction, one engaging member 37 is adjusted up and down, so that a pair of front and rear members of the engaging protrusion 40 and the engaging receiving member 38 can be adjusted. The height relationship with the joint 49 can be adjusted, and the work at the time of adjustment is very easy.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing a first embodiment of the present invention.

FIG. 2 is a plan sectional view of a main part of the first embodiment of the present invention.

FIG. 3 is a partially cutaway front view showing a main part of the first embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part showing the first embodiment of the present invention.

FIG. 5 is a plan view of the engagement receiver showing the first embodiment of the present invention.

FIG. 6 is a front view of the telescopic gate showing the first embodiment of the present invention.

FIG. 7 is a partially cutaway plan view of the telescopic gate showing the first embodiment of the present invention.

FIG. 8 is a front view of a telescopic gate showing a second embodiment of the present invention.

FIG. 9 is a partially cutaway plan view of a telescopic gate showing a second embodiment of the present invention.

FIG. 10 is a partially cutaway plan view of a main part showing a second embodiment of the present invention.

11 is a sectional view taken along line AA of FIG. 10;

FIG. 12 is a partially cutaway front view of a telescopic gate showing a third embodiment of the present invention.

FIG. 13 is a partially cutaway side view of a main part showing a third embodiment of the present invention.

FIG. 14 is a sectional view of a main part showing a fourth embodiment of the present invention.

[Explanation of symbols]

 5 Ground 6 Gate body 37 Engagement tool 38 Engagement receiver 39 Bar-shaped part 40 Engagement projection 49 Engagement part a Telescopic path

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 61-129100 (JP, U) Japanese Utility Model Sho 60-29600 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) E06B 11/02

Claims (1)

(57) [Scope of request for utility model registration] A gate body (6) is provided between a hanging-side support (3) and a door stop-side support (4) so as to be able to expand and contract freely, and is provided at a lower portion of the middle of the gate body (6) in the direction of expansion and contraction. An engaging member (37) is provided, and the engaging member (37) is detachable when the gate body (6) expands and contracts, and the engaging member is extended when the gate body (6) is extended and closed. (37) is engaged with the engagement receiver (38),
Suspension side support (3) and door stop side support (4) corresponding to (37)
In the fall prevention device for the telescopic gate provided on the ground (5) side in the middle of the above, the engaging projection (40) on the outer periphery of the lower end is provided substantially at the center of the lower part of the gate body (6) in the front-rear direction. A tool (37) is arranged, and the one engaging tool (37) is mounted on the gate body (6) so as to be vertically adjustable, and
(38) is provided one on the telescopic path (a) of the gate body (6),
A pair of front and rear engaging portions (49) with which the engaging projections (40) of the one engaging tool (37) respectively engage on both front and rear sides thereof are provided on the one engagement receiving tool (38). A fall prevention device for a telescopic gate, which is provided.