JPS6111359B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a paper machine that is effective not only for the double screen type but also for the Fourdrinier type. As shown in the side view of FIG. 2, the double-mesh paper machine is a paper machine in which a suspension of fibers is injected from a head box (not shown) and flows between the double-mesh screens 1 and 2 as shown by arrow 3.
A conventional fourdrinier paper machine in which a paper stock rectifying section 5 and a transfer forming section 6 are arranged on the left and right as shown in Fig. 1, which is the section where the uniform paper stock is dehydrated and sent to the transfer forming section 4 so as not to disturb it. It has the following advantages compared to other machines. That is, there is no difference between the front and back sides of the paper, and there is little variation in basis weight.
In addition, it has excellent advantages such as being able to operate stably at high speed and requiring approximately half the machine space.
We abolished the conventional Fourdrinier system and modified it to a double-mesh system,
In addition, an increasing number of paper manufacturers are installing new paper machines that employ the double-mesh type. However, as shown in Figure 2, the length of the double-mesh paper machine is approximately half that of the conventional Fourdrinier paper machine shown in Figure 1, but the height is larger, and the machine The load on the building (foundation) of each leg that supports the main body is greater than that of the fourdrinier type. Also, nets 1 and 2 of a double-mesh paper machine need to be replaced approximately every month, but since these nets are endless, when replacing the nets, please refer to Figures 3 and 4. Hold points A, B, C, and D with the line connecting points E, F, G, and H on the drive side of the machine shown as the fulcrum,
Leg 7 of a part of the line connecting points J, K, L, and M on the operating side
(Fig. 5) needs to be removed and remapped. Here, an example of the magnitude of the load on the legs during operation and rescreening is shown as a numerical example of the load as shown in Table 1. 〓〓〓〓〓

[Table] As can be seen from Figures 3 to 5 and Table 1, the conventional machine is held in a cantilever state during rescreening, and upward loads are applied at points A, B, C, and D. E,F,
At points G and H there is no undirected load, and at points J, K, L and M there is no load. Therefore, there are few problems when installing a new paper machine that uses a double-mesh type, but when converting to a double-mesh type paper machine, the load capacity must be increased, which lengthens the construction period and increases costs. There was a drawback. The present invention was proposed in order to eliminate the above-mentioned drawbacks of the conventional method.The load on the base beam is all directed downward, the load on each leg of the building (foundation) is also reduced, and the fourdrinier system is abolished. To provide a paper machine in which there is no need to increase the load capacity when a paper machine is modified to a double-mesh type, and therefore the modification period can be shortened and the cost can be reduced accordingly. Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 6 to 8, reference numerals 8 and 9 are base beams on the operation side and drive side;
Beams 10, 11, 12, 13 are installed perpendicularly to the upper part of the beam from the drive side to the operation side, and seats 14, 1 are attached to the end of the drive side of the beam.
5 is attached, and a cantilever bolt 16 that supports the double mesh paper machine is attached to the same seat.
17, 18, 19 are upper frames, beam 1
It is installed on top of 0, 11, 12, 13,
On the upper frames 17, 18, 19, an operating leg 20 and a driving leg 21 that support the paper machine are attached. Further, 22, 23, 24, and 25 are cantilevers, X is the machine weight, and N, O, Q, and S are points on which loads are applied. Next, the operation will be explained. Since part 20' of the operation side leg 20 is removed during rescreening, the machine weight X acts as a compressive load on the four drive side legs 21. On the other hand, a tensile load acts on the cantilever bolt 16 as a reaction force. This tensile load is applied to the beam 10,1
1, 12, 13, cantilever 22, 23, 2
4, 25, drive side leg 21, cantilever bolt 1
6 and the loads acting on the base beams 8 and 9 do not change. Therefore, no tensile load acts on the building at any time. That is, a load equal to the machine weight X including the weight of the beams acts only as a compressive load on the building (foundation) below the base beams 8 and 9. When one part 20' of the operating leg 20 is removed,
The load acting on points Q and S is the cantilever 2
2, 23, 24, and 25, a tensile force P acts on the cantilever bolt 16 centering on the driving leg 21 as shown in FIG. This load is beam 1
0, 11, 12, and 13, a compressive load W acts on the operating side base beam 8 centering on the drive side leg 21. FIG. 9 shows this in a simplified manner. P=l ₁ /l ₂・R W=l ₂ /l ₁・P=l ₂ /l ₁・l ₁ /l ₂・R
∴W=R. Table 2 shows numerical examples of the loads at points N, O, Q, and S in FIG.

[Table] Since the present invention is configured as explained in detail above, the loads applied to the base beams provided on the operation side and the drive side are all directed downwards as shown in Table 2, and the load on the base beams on the leg parts (foundation ). Also, as shown in Table 2, each load is smaller in total than in Table 1.
It is smaller, and the load that was concentrated on the drive side in conventional machines is distributed over a wide range on both the drive and operation sides, making building design easier and reducing ground subsidence. Buildings are generally strong against compressive loads and weak against tensile loads, but in the present invention, the lower part of the cantilever bolt is installed perpendicularly to the upper part of the base beam provided on the building roof, from the driving side to the operating side. The tensile force acting on the cantilever bolt is canceled out among the beam, the cantilever, the driving leg, and the cantilever bolt, and the tensile force is It does not act on the building as a load. Therefore, the design of the building becomes easier, the construction period of the building can be shortened, and the cost is reduced accordingly. Although the above explanation has mainly been given for the case of remodeling to a double net type, the present invention is effective not only in the case of remodeling but also in the case of new installation, and is applicable not only to the case of double net type. , is also effective in the case of Fourdrinier method.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional fourdrinier paper machine, Fig. 2 is a side view of a conventional double-mesh paper machine, and Fig. 3 is a side view of a conventional fourdrinier paper machine.
A plan view illustrating the load-bearing portion of the base frame in the case shown in Figure 4, a front view of the same, and Figure 5.
The figures are the same side view, FIG. 6 is a Y to Y arrow view of FIG. 7 in the paper machine showing the embodiment of the present invention, FIG. 7 is the same front view, and FIG. FIG. 9 is a simplified explanatory diagram of FIG. 7. Explanation of the main parts of the figure, 8, 9... Base beam, 10, 11, 12, 13... Beam, 14,
15... Seat, 16... Cantilever bolt, 1
7, 18, 19...Upper frame, 20...Operation side leg, 21...Drive side leg, 22, 23, 24, 2
5... Cantilever. 〓〓〓〓〓

Claims (1)

[Claims] 1. Support the cantilever that constitutes the base frame of the paper machine with the operation side leg and the drive side leg, install the cantilever bolt that supports the drive side of the cantilever, and remove a part of the operation side leg when inserting equipment such as a net. In such a paper machine, a base beam is installed on the operating side and a driving side on the building. A paper machine comprising: a beam having a seat at an end thereof to which a lower portion of the cantilever bolt is fixed; and an upper frame attached to the beam to support the operating leg and the driving leg, respectively. .