NL1024191C2 - Telescopic pole system for raising e.g. greenhouse roof, comprises inner and outer poles with cooperating supports engaged using jack - Google Patents

Abstract

Each pole comprises an inner pole (1) with supports (3-3'') arranged one above the other, an outer pole (2) with a support device (4) cooperating with a first support on the inner pole and a jack (7) with a rod (10) connecting the outer pole to a second support on the inner pole. The jack rod is supported directly by the second support. The supports are formed by recesses in the inner pole. A hydraulic jack or a pneumatic jack with a membrane cylinder is used. The support device is a lever with one end secured to the outer pole via a spring and one end which can be clamped inside a support on the inner pole. An independent claim is also included for a method for altering the height of a load extending over a wide surface area in a stepwise manner using this telescopic pole system, comprising the following steps: (a) anchoring a first pole in each telescopic pair in the ground or a foundation; (b) securing the load to the second pole; (c) raising the second pole using the jack until the support device engages with a first support on the first pole; and (d) retracting the jack until it engages with a second support above the first support so that the second pole can be lifted again.

Description

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DEVICE AND METHOD FOR STEP-BY-STEP VERTICAL MOUNTING OF A LOAD, SUCH AS A ROOF

The invention relates to a device and method for stepwise vertical movement of a load extending over a large surface, such as a roof, comprising a number of sets which each comprise two telescopic co-operating uprights.

Such a device is generally known for supporting roofs of, for example, a greenhouse, a cattle shed or an industrial building, where it is desirable to be able to increase the height of the roof. This is usually the case when more space is needed under the roof, as is the case, for example, in the following situations: - climate improvement in greenhouses or stables by increasing the space; - crops that become longer due to development, which means that a higher greenhouse is needed; the use of double cultivation layers whereby a higher greenhouse is required; - the use of new installations, such as new lighting, which require a higher greenhouse; - the expansion of an industrial building; raising the roof and possibly installing a storey floor.

Furthermore, such a device and method can also be applied in the construction of scaffolding and in renovation work. It is known to support a roof by a number of sets of telescopically cooperating piles, wherein a first pole is provided with a number of openings arranged one above the other at a stab distance on either side of the pole. The first pile of each set is placed on the ground or on a foundation and a second pile is slid over it, with a pin through opposite openings 1024191 Η

2 I

from the first pole is inserted, on which pin the second I

is supported. Such devices have the problem

problem that only loads that extend over a rela-

small surface area can be raised or lowered manually I

5 and that the carrying capacity is limited. I

Furthermore, US 4,067,448 describes a device for the I

moving a load stepwise vertically using an I

system consisting of a first pole with a number of supports I

and two sleeves arranged over it. Every sleeve is provided I

10 of a pawl coupling, and displaced between the two sleeves

augers in the form of a jack. I

The invention has for its object a device and method I

of the type mentioned in the preamble, with which I

in a convenient way a load that extends over an I

Large area can be raised. I

The device of the invention is distinguished for this purpose I

in that a first pile of each set is provided with an I

number of supports arranged one above the other at a pitch, I

and that a second pole of each set is provided with an I

20 a support cooperating support means for carrying the I

second pole and of a mortar with mortar bar which is active I

is between the second post and another support from the first I

pole, and which has a stroke that is at least equal to the I

pitch, the auger rod directly bearing on I

25 the support. I

This device can be used in two ways. I

Either the first pile is laid on the ground or on a foundation I

confirmed and the second pole is movable, or the I

second pole fixed on the ground or on a foundation and is I

The first pole is movable. In the first case, the operation is I

as follows. When the displacement means engage on an I

support from the first pole and they are put into operation, I

the second pole is moved upwards over, for example, the I

1024191 I

* λ 3 stitch spacing. Before the displacement means are put into operation, the support means cooperates with a first support, while when the second pole is raised, the support means is co-elevated until it cooperates with the support located above the first support. By simultaneously operating the displacement means of the different sets, the load can be lifted in a convenient manner without having to manually dispense pins, as was the case before the arrangement of the state of the art.

According to a possible embodiment variant, the supports are formed by recesses in the first post. In this way the supports can be arranged in a handy manner, for instance by cutting the recesses into a hollow pile.

According to a preferred embodiment, the displacement means are a jack, which has a jack rod that rests on a support during lifting. This jack is preferably a pneumatic jack with membrane cylinder. Such a pneumatic jack exists in relatively light embodiments and is therefore easy to attach to the second post. One could of course also use a hydraulic jack instead of the pneumatic jack.

The support means is preferably hingedly connected to the second pole and provided with a force element through which the support means presses against the first pole. In this way, the support means automatically engages a support when moving upwards along a support.

The force element can for instance be a spring arranged between the support element and the second post, which spring will be a tension or compression spring depending on the location relative to the hinge where the spring is mounted. According to another variant, the force element is, for example, a 1024191

weight that, for example, at one end of the support means I

is arranged, whereby the supporting element is on its other I

end is pressed against the first post. I

According to a further developed embodiment of the I

In accordance with the invention, the support means is in the longitudinal direction of the I

pivotally arranged lever arm mounted at one end I

by a spring is attached to the second post and to its I

other end can be clamped in a support. I

According to the preferred embodiment of the invention I

10, the first and second posts are hollow and rotational with respect to each other I

applied. The first and second posts may, for example, have an I

square or oval cross-section. However, it is equally I

once possible that the outer pole is hollow and square, while I

for example, the inner pole is an I-profile.

According to a further developed preferred embodiment I

of the invention, the recesses are arranged at level I

of a rib of the first post, and have them in each boundary

flat on the rib the shape of a rectangular triangle where I

from one rectangular side coincides with the rib, and the I

The other two rectangular sides are the lower edge of the recess I

to shape. I

The invention further relates to a method I

for stepping up one over an I

large surface load, such as a roof, where I

25 use is made of one of the I described above

variants of the device according to the invention. The working I

characterized by the following steps: I

- one of the two posts of each set is placed on the ground or on I

a foundation confirmed; I

- the load is fixed on the other posts; I

- the other pole of each set is raised by the I

displacement means which engage on a first aid, up to I

the support means engages a support of the first post; I

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- the displacement means are retracted until they engage on a second support located above the first support, after which the second pole can be raised again.

• In this way, a load with a large surface, such as a roof, can be lifted in a convenient way.

According to a preferred embodiment of the method according to the invention, the load is formed by a roof, wherein the displacement means of the different devices are operated synchronously in order to raise the roof.

The invention will be further elucidated with reference to the annexed drawings and the following figure description of a number of non-limiting exemplary embodiments of the device according to the invention. The drawing 15 shows: figure 1 is a perspective view of a first embodiment of one set of the device according to the invention; Figure 2 is a detailed view of a support with support means 20 of the embodiment of Figure 1; Figure 3 is a detailed view of a support on which a jack rod engages, of the embodiment of Figure 1; Figure 4 is a perspective view of a second embodiment of one set of the device according to the invention; figures 5A and 5B show two embodiments of a support with support means of a device according to the invention; Figure 6 is a perspective view of a greenhouse in which the roof is supported by a device according to the invention.

Figure 1 shows a first embodiment of a set of two telescopic co-operating piles of a device according to the invention. A first hollow post 1 is 1 0 24 1 9 1 Η

6 I

provided with a number at a pitch distance S above each other I

mounted supports 3. The second hollow post 2 is over the I

first pile 1 slid and provided with a support 3 '

cooperating support means 4 for supporting the second post I

2. Between the second post 2 and another support 3 "of the I

displacement means are active in the first pile. The displacement I

means consist of a pneumatic jack 7 with I

a jack 10 that engages in support 3n. I

The posts 1,2 both have a square cross section such as I

10 that they are not rotatable, so that a good I

alignment of both the support means 4 and the jack rod 10 I

with respect to the supports 3 is guaranteed. I

The supports 3 are formed by recesses in the first I

pile, which are arranged at the height of a rib of the I

The first pile, and in each interface on the rib have the shape I

of a rectangular triangle, each of which is a rectangular I

side coincides with the rib, and the other two rectangles I

the lower edge of the recess 3. Because of this I

on the one hand, the supporting means 4 can easily be removed from the I

Support 3 is drawn when the jack goes up, and I

on the other hand offer good support before the second post I

2 in the rest position. I

The pneumatic jack 7 is provided with an air inlet I

9, a membrane cylinder 8, and a jack rod 10. Furthermore, I

Mounting means 11, 12a, 12b, 13a, 13b provided for the assembly

of the jack on the second post 2. The hollow tubes 12a, I

12b are attached to the mounting piece 11, while the hollow I

tubes 13a, 13b are attached to the second post. Because of this I

tubes are put into the tubes on the second post I

30 to confirm. In this way the auger can easily be mounted

be dismantled. I

The support means 4 is a longitudinal direction of the posts I

by a lever arm 4 I arranged tiltably for a hinge 6

1024191 I

* 7 which is connected at one end by a spring 5 is attached to the second post 2 and is clampable at its other end in a support 3 '.

It will now be explained how this device can be used to raise a load step by step. A number of first piles 1, which telescopically cooperate with second piles 2, are mounted on the ground or on a foundation, after which the load is mounted on the second piles 2. The second piles 2 are raised by the pneumatic jacks 7 which with their jack rods 10 engage first supports 3 ", until support means 4 engage a support 3 'of the first posts. Subsequently, the jack rods 10 can be retracted until they engage on subsequent supports above the first supports 3", after which the second supports pole 2 can be raised again.

Figure 4 shows a second embodiment of a set of the device according to the invention. According to this variant, the second post 2 is mounted on the ground or on a foundation, and the first post 1 which is provided with supports 3 is arranged movably. The posts here have an oval cross-section such that they are again rotatable relative to each other.

Figure 5 shows other possible embodiments of the support means 4 of the device of the invention. In Fig. 5B, the support means 24 is by means of hinge 6 is hingedly connected to the second post 22 and is provided with a force element here in the form of a weight 25, whereby the supporting means 24 presses against the first post 1.

In the variant shown in Figure 5A, the force element 30 is a spring 35 arranged between the support element 34 and the second post 32. According to this variant, the support means 24 is attached to the inside of the second post 22, and the second post forms the inner post, instead of the outer pole. On a 1 0 24 19 1 Η Η

In an analogous manner, the displacement means would also satisfy I

the inside of the second post can be attached. I

Finally, figure 6 shows a greenhouse of plants whose roof I

is supported by a device according to the invention. I

5 A number of sets of telescopic standing posts

are installed under the roof D of a greenhouse that may be I

can be closed on the outside. I

The scope of the invention is not limited I

to the embodiments illustrated above, but I

On the contrary determined by the following claims. I

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Claims (13)

Device for stepwise vertical movement of a load extending over a large surface, such as a roof, comprising a number of sets each comprising two telescopic cooperating standing piles, characterized in that a first pile (1,21,31) ) of each set is provided with a number of supports (3 ', 3 ") arranged one above the other on top of one another, and that a second pole (2.22, 32) of each set is provided with a support ( 3 ') cooperating support means (4) for supporting the second pole and a jack with jack rod which acts between the second pole and another support (3n) of the first pole, and which has a stroke that is at least equal to the pitch 15 {S), the jack rod (10) being directly supported on the support (3 "). Device according to claim 1, characterized in that the supports (3.33) are formed by recesses in the first post. Device according to claim 1 or 2, characterized in that the jack is a pneumatic jack (7) with a membrane cylinder (8). Device according to claim 1 or 2, characterized in that the jack is a hydraulic jack. Device as claimed in any of the foregoing claims, characterized in that the support means (4,24,34) is hingedly connected to the second pole and is provided with a force element through which the support means presses against the first pole. 6. Device as claimed in claim 5, characterized in that the force element is a spring (5,35) arranged between the support element and the second post. Device according to claim 5, characterized in that the force element is a weight (25). 1024 19 1 Η% Η I ίο I Device as claimed in any of the foregoing claims, characterized in that the support means (4) is a lever arm which is arranged so as to be tiltable in the longitudinal direction of the posts that has an end by means of I. a spring (5) is attached to the second post (2) and is clampable at its other end in a support (3 '). I 9. Device as claimed in any of the foregoing claims, characterized in that the first and second pile are hollow and are fixedly fixed relative to each other. 10 Device as claimed in any of the foregoing claims, characterized in that the first and second pile have a square cross-section. I 11. Device as claimed in claims 2 and 8, characterized in that the recesses (3,33) are arranged at the height II of a rib of the first post and have the shape of in each boundary surface on the II rib a rectangular triangle whose II each time a rectangular side coincides with the rib, and the II both other rectangular sides form the lower edge of the recess II. I 20 12. Method for step-by-step raising of a load extending over a large surface, such as an II roof, using a device according to one of the preceding claims, characterized in that II - one of the two piles of each set is fixed on the ground or on a II 25 foundation; I I - the load is fixed on the other posts; The other pole of each set is raised by the moving means engaging a first support until the supporting means engages a support of the first pole; 30. the displacement means are retracted until they engage on a following support located above the first support, after which the second pole can be raised again. I 11024191 I ψ% Method according to claim 12, characterized in that the load is formed by the roof, wherein the displacement means of the different devices are operated synchronously to raise the roof. 10 24 19 1