JP3047883U - Non-equal pitch extension, reduction type combination pantograph. - Google Patents

Abstract

(57) [Summary] [Purpose] A combination type pantograph in which the opening pitch expands and contracts for a while, is mounted on an iron plate telescopic cover to smoothly expand and contract the cover and increase the expansion and contraction ratio. [Structure] Three shaft holes AA, provided in a piece of a pantograph,
GG of BB and GG is the center shaft hole, and AA and BB are the shaft holes at both ends.
A plurality of eccentric pieces 1 having eccentric eccentric pieces 1 in which the center point of the shaft hole GG is shifted from a line connecting the centers of the shaft holes AA and BB are connected by a combination with a pin, and are superimposed on a pantograph whose opening pitch changes temporarily. Unequal pitch punter and unequal pitch telescopic cover in combination with box.

Description

[Detailed description of the invention]

The combination type pantograph is used for general industry. FIG. 1 shows a typical example of a telescopic cover made of an iron plate. The telescopic cover 1 made of iron plate on which a combined pantograph (hereinafter referred to as a pantograph) P1 is mounted as shown in FIGS. 1 (a) and 1 (b) is composed of a plurality of boxes fitted into each other, and each telescopic box is stretchable. In order to make the expansion and contraction operation between the boxes smoother, generally, as shown in the schematic diagrams of FIGS. 1 (a) and 1 (b), the extension of each box 1-a, 1-b, 1-c, 1-d. The extension of the fulcrum PA1, PA2, PA3... Of the center of the pantograph P1 is fixed to the installation part so that each box in FIG. There is a slight clearance between the shaft and the shaft hole at each fulcrum, and the clearance does not always result in a uniform movement amount). FIG. 1 shows the telescopic state of a box in which a plurality of iron plate telescopic covers 1 are fitted. (A) shows a contracted state, and (b) shows an opened state. In FIG. 1A, generally, the depths a, b, c... Of the sliding portions of the boxes 1-a, 1-b, 1-c. In (a), adjacent boxes are b = c = e... Except for a, and the distance between the ends of the adjacent boxes is S. Next, in FIG. 1B, the overlap margin between the end faces of the adjacent boxes 1-a and 1-b, 1-b and 1-c, 1-c and 1-d,. When R is set, the maximum expansion capacity La is expressed as La = (a−R) + (b−R) + (c−R). The iron plate telescopic cover 1 needs to have a larger ratio of the maximum length Wmax1 to the minimum length Wmin1 in FIGS. 1 (a) and 1 (b), but in the case of the conventional pantograph P1, the ratio is Wmax1 / Wmin1. The ratio is about 2 at most. The conventional pantograph P1 has a constant pitch of X1 = X2 = X3 = X4 between the adjacent supports PA-1, PA-2,... For this reason, in FIG. 1A, it is not possible to three-dimensionally and effectively store the overlapping margins of each other. Therefore, there is a disadvantage that the ratio between Wmin1 and Wmax1 cannot be increased. Therefore, in order to increase Wmax1, the number of boxes to be stacked had to be increased. Increasing the number of stacked sheets naturally increases the amount of materials used, resulting in an increase in the total weight, an increase in frictional force during sliding, an increase in inertial force, and adversely affecting the ability of the forward and backward sliding speed. Of course, the burden on the pantograph also increases, and it is necessary to maintain a certain level of strength. In addition, the number of materials to be used naturally increases, and the processing cost due to the increase in the number of boxes increases.

In order to solve the above-mentioned drawbacks caused by the pantograph P1, the present inventor has studied diligently on a method for solving the problem of the box sliding method, and has attempted to temporarily change the opening pitch. A new combination type pantograph (hereinafter referred to as a new pantograph) obtained by connecting pieces that form an isosceles triangle by connecting the lines connecting the centers of the shaft holes with a pin and a shaft. developed. By using the new pantograph, the extension of each box is fixed to the fulcrum of each center, so that the sliding part of the box can be used effectively.

A detailed embodiment of the iron plate telescopic cover of the present invention using a combination of a new pantograph and a box will be described with reference to the drawings. First, a plan view showing the shape of the new pantograph P2 will be described with reference to FIGS. (A) shows the state where the new pantograph P2 is contracted, and (B) shows the state where it is opened. Next, FIG. 3 shows a plan view of a piece (hereinafter referred to as a piece) 2 of the new pantograph P2. In the figure, a shaft hole 3 at the center and shaft holes 4-a and 4-b on both sides are provided. An angle α is formed between an extension of a line connecting the centers 4-a and 3 of the shaft holes and a line connecting the centers of the shaft holes 3 and 4-b. That is, they are formed so as to form an isosceles triangle by lines connecting the centers of the shaft holes 4-a, 3 and 4-b. In other words, the center distance between the shaft holes 3 and 4-a is equal to the center distance between the shaft holes 3 and 4-b. A new pantograph P2 shown in FIG. 2 is formed by combining a plurality of the pieces 2. In FIG. 2, (a) shows a state where the new pantograph is contracted, and (b) shows a state where it is slightly opened. In FIG. 2, (a) shows that the adjacent pieces 2-1 and 2-2 interfere with each other at the portion of Q. If such interference occurs, the new pantograph does not shrink even if it is shrunk. . .. And shaft holes 4-a-1, 4-a-2... Provided in each piece 2-1, 2-2. 4-b-1, 4-b-2..., And the clearance between the inserted pins 5 (not shown in FIG. 2) is as close as possible to zero. By providing a small amount of the clearance, the adjacent pieces 2-1, 2-2, 2-3, and 2-4 can be contracted as shown in FIG. The theoretical background of the provision of the clearance is omitted, but the present inventor evaluated the dimensions of the piece 2 in FIG. 3 as L = 80 mm, W = 20 mm, α = 4 ° By setting the clearance between the diameter of the pin 5 facing each of the shaft holes φA = 8 mm and φB = 6 mm to 0.15 mm, the clearance between the pieces 2 is reduced to a close contact state as shown in FIG. Was completed. The pitches T1, T2, T3,... Shown in FIG. 2B, which are temporarily expanded, are enlarged in proportion to the angle α shown in FIG. Therefore, the positions of the shaft holes are set so as to select the angle α shown in FIG. 3 so that the pitches T1, T2, T3,. By extending the extending portions of the pins 5 provided in the shaft holes 3-1, 3-2,... In the center of the new pantograph P2 formed as described above, by fixing the extending portions of the fitted boxes. It can give effective movement according to each sliding length of the fitted box. That is, FIG. 5 shows a state in which (a) is contracted and (b) is expanded. The sliding allowance depths a ', b', c ', d', and e 'of the covers 6-a, 6-b, 6-c, 6-d, and 6-e are Y1, which are the temporary expansion of the pitch of the new pantograph. The dimensions can be set three-dimensionally in accordance with the movements of Y2, Y3, and Y4, that is, Y2 = Y1 + R ', Y3 = Y2 + R', and Y4 = Y3 + R '. As shown in FIG. 5 (b), the ratio Wmax / Wmin between the minimum length Wmin2 and the maximum length Wmax2 of the telescopic cover by the new pantograph is 3 or more as shown in FIG. However, the maximum length Wmax can be 1.5 times or more under the same Wmin condition as compared with the conventional pantograph P1. Incidentally, FIGS. 1 and 5 show a case where the minimum length is the same condition, that is, Wmin1 = Wmin2. By reducing the size, the elasticity of the cover can be made smoother, and the expansion and contraction ratio can be increased, so that more compact equipment for industrial machinery such as a steel-plated telescopic cover can be obtained.

[Submission date] June 9, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents] [Detailed description of the invention]

[0001] Combination type pantographs in which the pitch of each adjacent pantograph is equal are used for general industry. FIG. 1 shows a typical example of a conventional iron plate telescopic cover as one of them. An iron plate telescopic cover K equipped with a general combination type pantograph (hereinafter, referred to as a pantograph) P1 as shown in FIGS. 1 (a) and 1 (b) is composed of a plurality of boxes fitted into each other, and is extensible. In order to make the expansion and contraction operation between each box smoother, generally, each box Ka, Kb, Kc, Kd... As shown in the schematic diagrams of FIGS. Are fixed to the extension portions of the pantograph P1 so that the movement width between the boxes in FIG. 1 is the same (however, in general, There is a slight clearance between the shaft and the shaft hole at each fulcrum of the pantograph, and the movement is not always uniform due to the clearance.) FIG. 1 shows the telescopic cover of a conventional iron plate telescopic cover in which a plurality of boxes are fitted. (A) shows a contracted state and (b) shows an opened state. In FIG. 1A, generally, the depths a, b, c... Of the sliding parts of the boxes Ka, Kb, Kc. In a), adjacent boxes are b = c = e... Except for a, and the distance between the ends of adjacent boxes is S. Next, in FIG. 1B, the minimum overlap between the end faces of adjacent boxes Ka and Kb, Kb and Kc, Kc and Kd. ), The maximum extension capacity La is La = (a−R) + (b−R) + (c−R)... In an ideal iron plate telescopic cover, it is necessary that the ratio of the maximum length Wmax1 to the minimum length Wmin1 in FIGS. 1A and 1B is larger, but in the case of the conventional pantograph P1, Wmax1 The ratio of / Wmin1 is about 2 at most. The conventional pantograph P1 has a constant pitch of (X1 = X2 = X3 = X4) between adjacent fulcrums PA1, PA2,... In FIG. In (a), it is not possible to effectively store each other's overlapping allowance three-dimensionally. Therefore, there is a disadvantage that the ratio of Wmin1 to Wmax1 cannot be increased. Therefore, in order to increase Wmax1, the number of stacked boxes had to be increased. Increasing the number of stacked sheets naturally increases the amount of materials used and increases the total weight, and increases the frictional force and the inertia force during sliding, which has an adverse effect on the forward and backward sliding speed performance. Of course, the burden on the pantograph also increases, and it is necessary to maintain a certain level of strength. In addition, the number of materials used naturally increases, and the processing cost due to the increase in the number of boxes increases.

In order to eliminate the drawbacks of the conventional iron plate telescopic cover using the pantograph P1 described above, the present inventor has conducted intensive research on a method for solving the problem of the box sliding method, and has studied the opening pitch. Invented a non-equal pitch elongation and contraction type pantograph (hereinafter referred to as an unequal pitch punter) that can be changed for a while, and applied to the sliding part of the telescopic cover to achieve light weight and compactness. . First, the non-uniform pitch punter developed by the present inventors will be described. In FIG. 2 (a), three holes A, B and G are provided in a piece made of a rectangular flat plate processed to a required length L, and point G is the length of the piece. In the center of the direction, points A and B are located near both ends of each piece, and the length between points G and A is equal to the length between points G and B. Point G is on the line connecting points A and B. The angle between the extension line connecting the points A and G and the line connecting the points G and B is θ, and a piece with a shaft hole formed at each of the points A, B and G is used for the pantograph. An eccentric piece (hereinafter referred to as an eccentric piece) 1 is used, and shaft holes centered on points A, B, and G are respectively AA, BB, and GG, and pins opposed to the shaft holes AA, BB, and GG are shown in FIG. In (b), 2-A, 2-B, and 2-G are provided, respectively, and split pin through holes 2-A-1, 2-G-1, and 2-B-1 are provided. It is desirable that the shaft holes AA and BB and the pins 2-A and 2-B have the same dimensions. The three eccentric pieces 1 obtained as described above are overlapped so that the respective shaft holes AA, BB, and GG match as shown in FIG. 2-G is inserted through and set with the washer 3 and the split pin 4 as shown in the figure. As a set, several sets or dozens of sets are prepared according to the required number of connections, and only the middle eccentric piece 1 of each set is fixed as shown in FIG. This time, slightly shift clockwise in this direction, the upper shaft hole of the shifted eccentric piece 1 is set to AA, the lower shaft hole is set to BB, and the second and third sets are prepared in the same manner. As shown in FIGS. 5 (a) and (b), the shaft hole AA of the first set of eccentric pieces is shifted between the eccentric pieces on the side of the shaft hole AA of the second two eccentric pieces in the direction of the arrow (i). Insert and superimpose, insert the shaft hole BB at the bottom of the second set of eccentric pieces shifted between the eccentric pieces on the side of the shaft hole BB at the bottom of the two sets of eccentric pieces in the direction of the arrow (F), and superimpose. As shown in FIG. 5B, the pin 2-A is inserted into the shaft hole AA and the pin 2-B is inserted into the shaft hole BB where the eccentric pieces are overlapped with each other. Set each with the flasher 3 and the split pin 4 and connect from the first one or two to the required number of sets, three, four, five, etc. By using an eccentric piece obtained by cutting an extra eccentric piece protruding out of the shaft hole GG out of the eccentric piece as required, the unequal pitch punter P2 shown in FIG. 6 can be obtained.

Next, in FIG. 7, (a) shows a state in which the unequal pitch panta P2 is contracted, and (b) shows a state in which it is slightly opened (the illustration of pins, washers and split pins is omitted in the figure). did). In FIG. 7, (a) shows that the adjacent pieces 1-1 and 1-2 have already interfered with each other at the Q portion. The eccentric pieces 1-3, 1-4,... At the end of (a) do not shrink from the state of (a). In this case, the clearance between the inner diameters of the shaft holes AA, BB, and GG provided in each eccentric piece and the pins 2-A, 2-B, and 2-G to be inserted in opposition thereto is as close to zero as possible. In this case, by appropriately providing the clearance, the adjacent pieces 1-1, 1-2, 1-3,... Can be contracted as shown in FIG. The theoretical background of the provision of the clearance is omitted, but the inventors of the present invention evaluated the dimensions of the eccentric piece 1 between points A and G corresponding to the respective symbols in FIG. And the span between points G and B are CC = 80 mm, the eccentric piece width W = 20 mm, the eccentric angle θ = 4 °, each shaft hole diameter AA is 6 mm, BB is 6 mm, and GG is 8 mm. By setting the clearance (decreasing the pin diameter) between the opposing pins 2-A, 2-B and 2-G to the target of 0.15 mm (there is a variation in processing), As shown in FIG. 8, the space between the eccentric pieces could be reduced to the close contact state. The size of the actually required clearance is proportional to the size of θ in FIG. It is selected from the range of 3 to 3%. The feature of the unequal pitch patterner P2 of the present invention combining the eccentric pieces is that the eccentric piece 1 having the eccentricity as shown in FIG. Are omitted, but the pitch is temporarily widened as shown by pitches T1, T2, T3,... Shown in FIG. The way of opening is proportional to the magnitude of the angle θ shown in FIG. Therefore, it is possible to select and design the span between the shaft holes and the angle θ shown in FIG. 2 so that the required pitch of T1, T2, T3,.

[0004] The uneven pitch panta P2 formed above is opposed to the extending portion of each box of the box-shaped telescopic cover formed by slidably stacking a plurality of boxes. The extended portions of the pins set in the respective shaft holes GG at the centers of the core pieces are fixedly opposed to the extended portions of the box, respectively, so that the expansion and contraction sliding of the box can be performed by the eccentric piece of the unequal-pitch pant P2. By selecting the position of the shaft hole GG provided at the optimum condition, it is possible to contribute to a lighter weight and compactness as compared with the conventional iron plate telescopic cover.

Next, the details of the unequal pitch telescopic cover incorporating the unequal pitch panta P2 of the present invention will be described with reference to the drawings. FIG. 9 is a schematic cross-sectional view of an irregular pitch telescopic cover M incorporating the irregular pitch pant P2. In FIG. 9, (a) shows a state where the box is contracted and (b) is a state where the box is expanded. In the figure, the depths of the boxes Ma, Mb, Mc, Md... Are a ′, b ′, c ′, d ′. The pitch requires S 'and the minimum overlap between boxes requires R', and the box depths a ', b', c ', d', etc. are effectively obtained in three dimensions as shown in the figure. If the depth length of a ', b', c ', d' ... is used close to 100%, a very large expansion rate can be obtained, but the above-mentioned depth of the box is maximized. In addition, the inter-box pitch, Y1, Y2, Y3, Y4 (Y2 = Y1 + R ', Y3 = Y2 + R', Y4 = Y3 + R ') of FIG. This is ideal, but in combination with the non-uniform pitch panta P2 of the present invention, the Virtual can be realized. In other words, the dimensions of the eccentric piece 1 in FIG. 2, especially the relational expression of CC, θ, W and Y1, Y2, Y3, Y4 (the description of the relational expression is omitted), the depth of the cover, Since the dimensions can be set ideally, it is possible to obtain a much larger expansion / contraction ratio of the cover than in the case of the conventional pantograph P1. As shown in FIG. 9 (b), the ratio Wmax2 / Wmin2 of the minimum length Wmin2 and the maximum length Wmax2 of the telescopic cover by the unequal-pitch panta P2 is 3 or more. On the other hand, the maximum length Wmax can be 1.5 times or more under the same Wmin condition. Incidentally, FIGS. 1 and 9 show the case where the minimum length is the same condition, that is, Wmin1 = Wmin2. As is clear from comparison of the two figures, when the non-equal pitch panta P2 is used, the same extension length is used. On the other hand, it is possible to reduce the number of boxes by at least one and to increase the expansion / contraction ratio. Therefore, it is a non-uniform pitch panter and a non-uniform pitch telescopic cover which is useful as a device for industrial machinery.

[Submission date] July 30, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents] [Detailed description of the invention]

[0001] Combination type pantographs in which the pitch of each adjacent pantograph is equal are used for general industry. FIG. 1 shows a typical example of a conventional iron plate telescopic cover as one of them. An iron plate telescopic cover K equipped with a general combination type pantograph (hereinafter, referred to as a pantograph) P1 as shown in FIGS. 1 (a) and 1 (b) is composed of a plurality of boxes fitted into each other, and is extensible. In order to make the expansion and contraction operation between the boxes smoother, generally, the boxes Ka, Kb, Kc, Kd,... As shown in the schematic diagrams of FIGS. Are fixed to the extension portions of the pantograph P1 so that the movement width between the boxes in FIG. 1 is the same (however, in general, There is a slight clearance between the shaft and the shaft hole at each fulcrum of the pantograph, and the movement is not always uniform due to the clearance.) FIG. 1 shows the telescopic cover of a conventional iron plate telescopic cover in which a plurality of boxes are fitted. (A) shows a contracted state and (b) shows an opened state. In FIG. 1A, generally, the depths a, b, c... Of the sliding parts of the boxes Ka, Kb, Kc. In a), adjacent boxes are b = c = e... Except for a, and the distance between the ends of adjacent boxes is S. Next, in FIG. 1B, the minimum overlap between the end faces of adjacent boxes Ka and Kb, Kb and Kc, Kc and Kd. ), The maximum extension capacity La is La = (a−R) + (b−R) + (c−R)... An ideal iron plate telescopic cover needs a larger ratio of the maximum length Wmax1 to the minimum length Wmin1 in FIGS. 1 (a) and 1 (b). In the case of the conventional pantograph P1, the ratio is Wmax1. The ratio of / Wmin1 is about 2 at most. The conventional pantograph P1 has a constant pitch of (X1 = X2 = X3 = X4) between adjacent fulcrums PA1, PA2,... In FIG. In (a), it is not possible to effectively store each other's overlapping allowance three-dimensionally. Therefore, there is a disadvantage that the ratio of Wmin1 to Wmax1 cannot be increased. Therefore, in order to increase Wmax1, the number of stacked boxes had to be increased. Increasing the number of stacked sheets naturally increases the amount of materials used and increases the total weight, and increases the frictional force and the inertia force during sliding, which has an adverse effect on the forward and backward sliding speed performance. Of course, the burden on the pantograph also increases, and it is necessary to maintain a certain level of strength. In addition, the number of materials used naturally increases, and the processing cost due to the increase in the number of boxes increases.

In order to eliminate the drawbacks of the conventional iron plate telescopic cover using the pantograph P1 described above, the present inventor has conducted intensive research on a method for solving the problem of the box sliding method, and has studied the opening pitch. Invented a non-equal pitch elongation and contraction type pantograph (hereinafter referred to as an unequal pitch punter) that can be changed for a while, and applied to the sliding part of the telescopic cover to achieve light weight and compactness. . First, the non-uniform pitch punter developed by the present inventors will be described. In FIG. 2 (a), three holes A, B and G are provided in a piece made of a rectangular flat plate processed to a required length L, and point G is the length of the piece. In the center of the direction, points A and B are located near both ends of each piece, and the length between points G and A is equal to the length between points G and B. Point G is on the line connecting points A and B. The angle between the extension line connecting the points A and G and the line connecting the points G and B is θ, and a piece with a shaft hole formed at each of the points A, B and G is used for the pantograph. An eccentric piece (hereinafter referred to as an eccentric piece) 1 is used, and shaft holes centered on points A, B, and G are respectively AA, BB, and GG, and pins opposed to the shaft holes AA, BB, and GG are shown in FIG. In (b), 2-A, 2-B, and 2-G are provided, respectively, and split pin through holes 2-A-1, 2-G-1, and 2-B-1 are provided. It is desirable that the shaft holes AA and BB and the pins 2-A and 2-B have the same dimensions. The three eccentric pieces 1 obtained as described above are overlapped so that the respective shaft holes AA, BB, and GG match as shown in FIG. 2-G is inserted through and set with the washer 3 and the split pin 4 as shown in the figure. As a set, several sets or dozens of sets are prepared according to the required number of connections, and only the middle eccentric piece 1 of each set is fixed as shown in FIG. This time, slightly shift clockwise in this direction, the upper shaft hole of the shifted eccentric piece 1 is set to AA, the lower shaft hole is set to BB, and the second and third sets are prepared in the same manner. As shown in FIGS. 5 (a) and (b), the shaft hole AA of the first set of eccentric pieces is shifted between the eccentric pieces on the side of the shaft hole AA of the second two eccentric pieces in the direction of the arrow (i). Insert and superimpose, insert the shaft hole BB at the bottom of the second set of eccentric pieces shifted between the eccentric pieces on the side of the shaft hole BB at the bottom of the two sets of eccentric pieces in the direction of the arrow (F), and superimpose. As shown in FIG. 5B, the pin 2-A is inserted into the shaft hole AA and the pin 2-B is inserted into the shaft hole BB where the eccentric pieces are overlapped with each other. Set them with washers 3 and split pins 4 respectively, and connect them from the first one or two to three, four, five, etc. to the required number of sets. By using an eccentric piece obtained by cutting an extra eccentric piece protruding out of the shaft hole GG out of the eccentric piece as required, the unequal pitch punter P2 shown in FIG. 6 can be obtained.

Next, in FIG. 7, (a) shows a state in which the unequal pitch panta P2 is contracted, and (b) shows a state in which it is slightly opened (the illustration of pins, washers and split pins is omitted in the figure). did). In FIG. 7, (a) shows that the adjacent pieces 1-1 and 1-2 have already interfered with each other at the Q portion. The eccentric pieces 1-3, 1-4,... At the end of (a) do not shrink from the state of (a). In this case, the clearance between the inner diameters of the shaft holes AA, BB, and GG provided in each eccentric piece and the pins 2-A, 2-B, and 2-G to be inserted in opposition thereto is as close to zero as possible. In this case, by appropriately providing the clearance, the adjacent pieces 1-1, 1-2, 1-3,... Can be contracted as shown in FIG. The theoretical background of the provision of the clearance is omitted, but the inventors of the present invention evaluated the dimensions of the eccentric piece 1 between points A and G corresponding to the respective symbols in FIG. And the span between points G and B are CC = 80 mm, the eccentric piece width W = 20 mm, the eccentric angle θ = 4 °, each shaft hole diameter AA is 6 mm, BB is 6 mm, and GG is 8 mm. By setting the clearance (decreasing the pin diameter) between the opposing pins 2-A, 2-B and 2-G to the target of 0.15 mm (there is a variation in processing), As shown in FIG. 8, the space between the eccentric pieces could be reduced to the close contact state. The size of the actually required clearance is proportional to the size of θ in FIG. It is selected from the range of 3 to 3%. The feature of the unequal pitch patterner P2 of the present invention combining the eccentric pieces is that the eccentric piece 1 having the eccentricity as shown in FIG. Are omitted, but the pitch is temporarily widened as shown by pitches T1, T2, T3,... Shown in FIG. The way of opening is proportional to the magnitude of the angle θ shown in FIG. Therefore, it is possible to select and design the span between the shaft holes and the angle θ shown in FIG. 2 so that the required pitch of T1, T2, T3,.

[0004] The uneven pitch panta P2 formed above is opposed to the extending portion of each box of the box-shaped telescopic cover formed by slidably stacking a plurality of boxes. The extended portions of the pins set in the respective shaft holes GG at the centers of the core pieces are fixedly opposed to the extended portions of the box, respectively, so that the expansion and contraction sliding of the box can be performed by the eccentric piece of the unequal-pitch pant P2. By selecting the position of the shaft hole GG provided in the box under the optimum conditions, it is possible to contribute to a reduction in weight and size as compared with a conventional iron plate telescopic cover.

Next, the details of the unequal pitch telescopic cover incorporating the unequal pitch panta P2 of the present invention will be described with reference to the drawings. FIG. 9 is a schematic cross-sectional view of an irregular pitch telescopic cover M incorporating the irregular pitch pant P2. In FIG. 9, (a) shows a state where the box is contracted and (b) is a state where the box is expanded. In the figure, the depths of the boxes Ma, Mb, Mc, Md... Are a ′, b ′, c ′, d ′. The pitch requires S 'and the minimum overlap between boxes requires R', and the box depths a ', b', c ', d', etc. are effectively obtained in three dimensions as shown in the figure. If the depth length of a ', b', c ', d' ... is used close to 100%, a very large expansion rate can be obtained, but the above-mentioned depth of the box is maximized. In addition, the inter-box pitch, Y1, Y2, Y3, Y4 (Y2 = Y1 + R ', Y3 = Y2 + R', Y4 = Y3 + R ') of FIG. This is ideal, but in combination with the non-uniform pitch panta P2 of the present invention, the Virtual can be realized. In other words, the dimensions of the eccentric piece 1 in FIG. 2, especially the relational expression of CC, θ, W and Y1, Y2, Y3, Y4 (the description of the relational expression is omitted), the depth of the cover, Since the dimensions can be set ideally, it is possible to obtain a much larger expansion / contraction ratio of the cover than in the case of the conventional pantograph P1. As shown in FIG. 9 (b), the ratio Wmax2 / Wmin2 of the minimum length Wmin2 and the maximum length Wmax2 of the telescopic cover by the unequal-pitch panta P2 is 3 or more. On the other hand, the maximum length Wmax can be 1.5 times or more under the same Wmin condition. Incidentally, FIGS. 1 and 9 show the case where the minimum length is the same condition, that is, Wmin1 = Wmin2. As is clear from comparison of the two figures, when the non-equal pitch panta P2 is used, the same extension length is used. On the other hand, it is possible to reduce the number of boxes by at least one and to increase the expansion / contraction ratio. Therefore, it is a non-uniform pitch panter and a non-uniform pitch telescopic cover which is useful as a device for industrial machinery.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of use of a pantograph in an iron plate telescopic cover.

FIG. 2 is a plan view showing a pantograph.

FIG. 3 is a plan view showing a piece of a pantograph.

FIG. 4 is a plan view showing a state where the pantograph is folded to a close contact state.

FIG. 5 is a sectional view showing an example of an iron plate telescopic cover using the pantograph of the present invention.

[Explanation of symbols]

Reference Signs List 1 Telescopic cover made of iron plate 2 Eccentric piece of new pantograph 3 Center hole of eccentric piece of new pantograph P1 Combined pantograph P2 New combined pantograph R Overlap allowance 1-a, 1-b ... 1-e Boxes a, b... E Sliding part depth PA1, PA2... PA5 Center fulcrum of pantograph P1 X1, X2... X4 Box opening pitch Wmin1 Minimum box length Wmax1 Maximum box length 3-1 ... 3-4 Shaft hole 4-a-1 ... 4-a-3 Shaft hole 4-b-1 ... 4-b-3 Shaft hole T1, T2, T3 Pantograph opening pitch φA Center shaft hole diameter of new pantograph eccentric piece φB Both side shaft hole diameter of new pantograph eccentric piece 4-a, 4-b Both side shaft hole L Distance between shaft holes W Width of eccentric piece a ', b' ... 'Sliding allowance depth Y1, Y2 ... Y4 New pantograph pitch 5-1, 5-2 ... 5-5 pin a', b '... e' Sliding allowance depth 6 a, 6-b... 6-d box PB1, PB2... PB5 Center fulcrum of new pantograph P2 Minimum length of Wmin2 box Maximum length of Wmax2 box

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[Procedure amendment]

[Submission date] June 9, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Name of device] Non-equal pitch expansion / reduction combination pantograph.

[Utility model registration claims]

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of use of a conventional pantograph in a conventional iron plate telescopic cover.

FIG. 2 is a sectional view showing an eccentric piece and a pin of the unequal-pitch pantograph of the present invention.

FIG. 3 is a perspective view showing a method of assembling the eccentric piece three-piece set according to the present invention;

FIG. 4 is a perspective view showing a finished state of the eccentric piece three-piece set of the present invention.

FIG. 5 is a perspective view showing a method of connecting three eccentric pieces according to the present invention.

FIG. 6 is a perspective view of the unequal-pitch pant according to the present invention.

FIG. 7 is a perspective view showing the expanded and contracted state of the unequal-pitch pant according to the present invention.

FIG. 8 is a perspective view showing the close contact state of the unequal-pitch pant according to the present invention.

FIG. 9 is a perspective view of an uneven pitch telescopic cover incorporating the uneven pitch pant according to the present invention.

[Description of Signs] P1 Conventional pantograph P2 Non-uniform pitch of the present invention R Overlapping margin of conventional box Ka, Kb... Ke Conventional box a, b... E Conventional box Depth of PA1, PA2 ... PA5 Conventional pantograph P1
X4, X2,..., X4 Open pitch of conventional box Wmin1 Minimum length of conventional box Wmax1 Maximum length of conventional box K Conventional iron plate telescopic cover 1 Eccentric piece A, B of the present invention , G The center point of each shaft hole provided on the eccentric piece of the present invention AA, BB, GG Each shaft hole provided on the eccentric piece of the present invention 2-A, 2-B, 2-G The axis of the eccentric piece of the present invention Pins to be inserted into holes 3 Washers 4 Split pins T1, T2, T3 Open pitch of unequal-pitch panta of the present invention L Length of eccentric piece of the present invention W Width of eccentric piece of the present invention a ', b' ... e 'Depth of the cover of the present invention Y1, Y2... Y4 Open pitch of the non-uniform pitch panta of the present invention Ka, Kb... Kd Box of the non-uniform pitch telescopic pitch cover of the present invention Wmin2 Minimum length of the box of the present invention Wmax2 Maximum length of the box of the present invention

[Procedure amendment 2]

[Document name to be amended] Drawing

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FIG.

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FIG. 9

[Procedure amendment]

[Submission date] July 30, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

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[Document Name] Statement

[Name of device] Non-equal pitch expansion / reduction combination pantograph.

[Utility model registration claims]

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of use of a conventional pantograph in a conventional iron plate telescopic cover.

FIG. 2 is a sectional view showing an eccentric piece and a pin of the unequal-pitch pantograph of the present invention.

FIG. 3 is a perspective view showing a method of assembling the eccentric piece three-piece set according to the present invention;

FIG. 4 is a perspective view showing a finished state of the eccentric piece three-piece set of the present invention.

FIG. 5 is a perspective view showing a method of connecting three eccentric pieces according to the present invention.

FIG. 6 is a perspective view of the unequal-pitch pant according to the present invention.

FIG. 7 is a perspective view showing the expanded and contracted state of the unequal-pitch pant according to the present invention.

FIG. 8 is a perspective view showing the close contact state of the unequal-pitch pant according to the present invention.

FIG. 9 is a perspective view of an uneven pitch telescopic cover incorporating the uneven pitch pant according to the present invention.

[Description of Signs] P1 Conventional pantograph P2 Non-equidistant pitch of the present invention R Overlapping allowance of conventional box Ka, Kb... Ke Conventional box a, b ボ ッ ク ス e Conventional box depth PA1, PA2 ... PA5 Center fulcrum of conventional pantograph P1 X1, X2 ‥‥ X4 Open pitch of conventional box Wmin1 Minimum length of conventional box Wmax1 Maximum length of conventional box K Conventional iron plate telescopic cover 1 Eccentric pieces A, B, G Center points of each shaft hole provided in the eccentric piece of the present invention AA, BB, GG Each shaft hole provided in the eccentric piece of the present invention 2-A, 2-B, 2-G The present invention Pin 3 washer 4 Split pin T1, T2, T3 Open pitch of unequal-pitch panta of the present invention L Length of eccentric piece of the present invention W Width of eccentric piece of the present invention a ', b' ‥‥ '' Depth of the cover of the present invention Y1, Y2 ‥‥ Y4 Open pitch of the unequal pitch punter of the present invention Ka, Kb ‥‥ Kd Box of the unequal pitch telescopic pitch cover of the present invention Wmin2 Box of the present invention The maximum length of the box of the present invention Wmax2 The maximum length of the box of the present invention

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FIG. 3

FIG.

FIG. 4

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FIG. 7

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FIG. 9

Claims (3)

[Utility model registration claims] 1. A combination obtained by connecting a plurality of plate-shaped eccentric pieces by a pin and a shaft so as to form an isosceles triangle by connecting lines connecting the centers of three shaft holes. In FIG. 3 showing a plate-shaped eccentric piece (hereinafter referred to as a piece) 2 of a combination pantograph in a pantograph, a central shaft hole 3, a shaft hole 4-a on both sides,
4-b, and has an angle α formed by an extension of a line connecting the centers 4-a and 3 of the shaft holes and a line connecting the centers of the shaft holes 3 and 4-b. A line connecting the centers of the shaft holes 4-a, 3, and 4-b forms an isosceles triangle, and a plurality of the pieces 2 are provided at the center of the eccentric piece 2 shown in FIG. -1, 5-2, 5-3,..., Unequal pitch expansion / reduction combination pantographs connected by. 2. FIG. 3 showing a piece 2 of the combination type pantograph, wherein a shaft hole 3 at the center and shaft holes 4-a, 4a at both sides are shown.
-B, and has an angle α formed by an extension of a line connecting the centers 4-a and 3 of the shaft holes and a line connecting the centers of the shaft holes 3 and 4-b. A line connecting the centers of the holes 4-a, 3, and 4-b forms an isosceles triangle, and a plurality of the pieces 2 are provided at pins 5 provided at the center of the piece 2 in FIG.
In the unequal-pitch expansion / reduction combination pantograph P2 connected by 1, 5-2, 5-3,..., The pins 5-1, 5-2, 5-3,.・ Boxes 6-A, 6-
A non-equal-pitch stretchable, reduced-type telescopic cover made by fastening the extension portions B, 6-C,... 3. A shaft hole 4-a, 3;
3. A clearance according to claim 1, wherein a clearance corresponding to 0.3 to 3% of the pin outer diameter is provided between each inner diameter of 4-b and an outer diameter of a pin inserted into each shaft hole. range.