Sheet cutting device

Abstract

To provide a sheet cutting device easily suppressing flapping of a sheet material, and capable of cutting with high accuracy regardless of the skill of an operator.SOLUTION: There is provided a body part 1 for supporting a cutting member 2 cutting a sheet material S1. The body part 1 has an upper body part 3, a lower body part 4, and a connection part 5 for connecting the upper body part 3 and the lower body part 4. A sheet insertion space 9 as a space allowing the sheet material S1 to be inserted is formed between the upper body part 3 and the lower body part 4. At least a part of the cutting member 2 is positioned in the sheet insertion space 9, and at least one of the upper body part 3 and the lower body part 4 has an abutting part 12 capable of being abutted on a wall surface E in a building. There is provided a projection 7 positioned at a side at which the abutting part 12 is positioned to the cutting member 2 in a directional vision along a cutting direction of the sheet material S1 by the cutting member 2, and projecting so as to press the sheet material S1 in a vertical direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a sheet cutting device for cutting sheet material. [Background technology]

[0002] As an example of such a sheet cutting device, the one described in Patent Document 1 is already known. This sheet cutting device includes a cutting member (called a "cutting blade" in Patent Document 1) for cutting the sheet material, and a contact part that can contact a wall surface of a building. In Patent Document 1, the inner peripheral surface of the rising wall on the roof of the building is covered with the sheet material. Therefore, the surface of the portion of the sheet material that covers the inner peripheral surface of the rising wall becomes the wall surface of the building. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-165742 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the sheet cutting device described in Patent Document 1, it is expected that flapping (i.e., twisting, wrinkling, lifting, etc.) will occur in the portion of the sheet material on the side where the cutting member is located from the portion where the contact part is in contact (in other words, the inside corner of the sheet material and the portion on the edge side of the sheet material from the inside corner) As a result, it is expected that the accuracy of the cutting position will be reduced depending on the skill of the operator.

[0005] An object of the present invention is to provide a sheet cutting device that can easily suppress flapping of sheet material and can perform high-precision cutting regardless of the skill of the operator. [Means for solving the problem]

[0006] The present invention is characterized in that it comprises a cutting member for cutting a sheet material, and a main body portion for supporting the cutting member, the main body portion having an upper main body portion, a lower main body portion located lower than the upper main body portion, and a connecting portion connecting the upper main body portion and the lower main body portion, a sheet insertion space into which the sheet material can be inserted is formed between the upper main body portion and the lower main body portion, at least a part of the cutting member is located in the sheet insertion space, at least one of the upper main body portion and the lower main body portion has a contact portion capable of contacting a wall surface of a building, and a protruding portion is provided which is located on the side of the cutting member where the contact portion is located when viewed in a direction along the cutting direction of the sheet material by the cutting member and which protrudes so as to press the sheet material in the vertical direction. The protrusion is provided on the upper body portion. The reason is that...

[0007] According to this configuration, the protruding portion presses the sheet material upward or downward. This makes it easy to prevent the sheet material from flapping. Therefore, according to this configuration, it is possible to realize a sheet cutting device that can easily prevent the sheet material from flapping and can cut with high precision regardless of the skill of the operator.

[0008] Furthermore, in the present invention, it is preferable that the main body portion is provided with a holding mechanism for holding the cutting member, and the holding mechanism is configured to be able to change the position of the cutting member relative to the main body portion, and that the distance between the contact portion and the cutting member in a planar view changes when the position of the cutting member is changed.

[0009] Conventional sheet cutting devices were unable to change the cutting position of the sheet material, which meant that the cutting position of the sheet material was sometimes not optimal depending on the building structure, work conditions, etc.

[0010] According to this configuration, the distance between the contact portion and the cutting member in a plan view can be changed, thereby realizing a sheet cutting device that can change the cutting position of the sheet material depending on the situation.

[0011] Furthermore, the present invention Another feature of the present invention is a cutting tool for cutting a sheet material, comprising: a cutting member for cutting a sheet material; and a body portion for supporting the cutting member, the body portion having an upper body portion, a lower body portion located below the upper body portion, and a connecting portion for connecting the upper body portion and the lower body portion, a sheet insertion space into which the sheet material can be inserted is formed between the upper main body portion and the lower main body portion, at least a part of the cutting member is located in the sheet insertion space, at least one of the upper main body portion and the lower main body portion has a contact portion capable of contacting a wall surface of a building, and is provided with a protrusion portion which is located on the side of the cutting member where the contact portion is located when viewed in a direction along the cutting direction of the sheet material by the cutting member and which protrudes so as to press the sheet material in the vertical direction, the main body portion is provided with a holding mechanism which holds the cutting member, the holding mechanism being configured to be able to change the position of the cutting member relative to the main body portion, and configured so that changing the position of the cutting member changes the distance between the contact portion and the cutting member in a plan view, The holding mechanism has a support part that supports the cutting member and a clamping part that clamps the support part, and the support part can be rotated around a first rotation axis along the up-down direction when detached from the clamping part to change its position between a first position and a second position that is an inverted position relative to the first position, and the clamping part is configured to be able to clamp the support part regardless of whether the support part is in the first position or the second position, and the cutting member is disposed at a position spaced a predetermined distance from the first rotation axis when viewed in the cutting direction, and the holding mechanism is configured to be able to change the position of the cutting member relative to the main body by changing the position of the support part between the first position and the second position. Kotoa do.

[0012] According to this configuration, the distance between the contact part and the cutting member in a plan view can be changed simply by changing the position of the support part between the first position and the second position, thereby realizing a sheet cutting device that can easily change the cutting position of the sheet material.

[0013] Furthermore, in the present invention, it is preferable that the cutting member is attached to the upper main body portion and has a polygonal shape, and that the cutting member is provided with blade portions capable of cutting the sheet material at positions corresponding to two adjacent sides of the polygon, and that the cutting member is provided with a corner portion corresponding to the corner sandwiched between the two sides facing downward.

[0014] According to this configuration, when cutting sheet material while moving the sheet cutting device along the wall surface of a building, cutting can be performed not only by moving in one direction, but also by moving in the opposite direction. In other words, the worker can work both while pushing and pulling the sheet cutting device. Therefore, workability is improved compared to a configuration that can only cut by moving in one direction.

[0015] Furthermore, in the present invention, it is preferable that the cutting member is provided with the blade portions at locations corresponding to all of the sides of the polygon, and that the cutting member is configured so that its attachment posture to the upper main body portion can be changed around a second rotation axis passing through the center of the polygon.

[0016] According to this configuration, when one of the blades becomes worn, simply by changing the mounting position of the cutting member, another blade can be placed in the position where the worn blade was located, making it possible to easily replace the worn blade with a blade that is not yet worn.

[0017] Furthermore, the present invention Another feature of the present invention is that the cutting machine includes a cutting member for cutting the sheet material, and a main body for supporting the cutting member, the main body having an upper main body, a lower main body located lower than the upper main body, and a connecting portion connecting the upper main body and the lower main body, a sheet insertion space into which the sheet material can be inserted is formed between the upper main body and the lower main body, at least a part of the cutting member is located in the sheet insertion space, at least one of the upper main body and the lower main body has a contact portion capable of contacting a wall surface of a building, and a protruding portion is provided which is located on the side of the cutting member where the contact portion is located when viewed in a direction along the cutting direction of the sheet material by the cutting member and which protrudes so as to press the sheet material in the vertical direction, The cutting member is supported by the upper body portion and is disposed in a state of extending downward from the upper body portion. A recess is formed on the upper surface of the lower body portion at a portion overlapping with the cutting member in a plan view, the recess being recessed downward. The recess does not penetrate the lower body portion and has a bottom. R Kotoa do.

[0018] According to this configuration, even if the lower end of the cutting member is located at a relatively low position, the recess makes it easier to avoid interference between the cutting member and the lower main body. Therefore, it is possible to realize a sheet cutting device that can easily avoid interference between the cutting member and the lower main body while maintaining a good cutting state of the sheet material by positioning the lower end of the cutting member at a relatively low position.

[0019] Furthermore, in the present invention, a gripping portion that can be gripped by an operator is attached to the upper main body portion, and the protrusion is supported by the upper main body portion and arranged in a state where it protrudes downward from the upper main body portion, and it is preferable that, when viewed in a plane, the gripping portion is arranged on the side where the protrusion is located relative to the connecting portion.

[0020] According to this configuration, when an operator applies a downward force to the gripping portion, the upper body portion is easily bent downward. When the upper body portion is bent downward, the protruding portion moves downward. As a result, the protruding portion can reliably hold down the sheet material.

[0021] Furthermore, in the present invention, it is preferable that the lower main body portion does not overlap the protrusion in a plan view.

[0022] In a configuration in which the lower body overlaps with the protruding portion in a plan view, the portion of the sheet material pressed by the protruding portion is sandwiched between the protruding portion and the upper surface of the lower body, which tends to generate a relatively large frictional force between the sheet material and the sheet cutting device, making it difficult to move the sheet cutting device smoothly along the wall surface.

[0023] According to this configuration, the portion of the sheet material pressed by the protruding portion is not pinched between the protruding portion and the upper surface of the lower main body portion, which makes it easier to avoid a situation in which a relatively large amount of friction occurs between the sheet material and the sheet cutting device, making it easier to move the sheet cutting device smoothly along the wall surface.

[0024] Furthermore, in the present invention, it is preferable that the gripping portion is disposed between the cutting member and the connecting portion in a plan view.

[0025] According to this configuration, the arrangement of the gripping part, the cutting member, and the connecting part can be more compact in the front-rear direction (the cutting direction of the sheet material) than when the gripping part is located in front of or behind the cutting member or the connecting part in a plan view. Therefore, it is possible to shorten the front-rear length of the sheet cutting device. As a result, a compact and easy-to-handle sheet cutting device can be realized.

[0026] Furthermore, in the present invention, it is preferable that the protrusion is a roller.

[0027] According to this configuration, it is easy to avoid a situation in which a relatively large friction occurs between the protrusion and the sheet material, and this makes it easy to move the sheet cutting device smoothly along the wall surface.

[0028] Furthermore, in the present invention, it is preferable that a chamfer is formed on at least one lower end of both ends of the lower main body portion in the cutting direction.

[0029] According to this configuration, the lower main body portion is less likely to get caught on unevenness or the like of the base during the cutting operation of the sheet material, and therefore the sheet cutting device can be moved smoothly along the wall surface. [Brief description of the drawings]

[0030] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 4 is a vertical cross-sectional view showing the state after installation of the first sheet is completed. [Figure 6] FIG. 4 is a vertical sectional rear view showing the configuration of a holding mechanism and the like. [Figure 7] 13A and 13B are diagrams illustrating changes in the attitude of a support part. [Figure 8] FIG. 4 is a vertical sectional rear view showing the configuration of a holding mechanism and the like. [Figure 9] 4A and 4B are diagrams showing the configuration of a cutting member and a supporting portion. [Figure 10] 13A and 13B are diagrams illustrating changes in the position of a cutting member. [Figure 11] FIG. 2 is a plan view showing the configuration of a lower main body portion and the like. [Figure 12] FIG. 4 is a left side view showing the configuration of the chamfered portion and the like. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] The embodiment of the present invention will be described with reference to the drawings. In the following description, unless otherwise specified, the direction of the arrow F shown in Figures 1, 2, 11, and 12 is defined as "front", the direction of the arrow B is defined as "rear", the direction of the arrow L shown in Figures 1, 3 to 6, 8, and 11 is defined as "left", and the direction of the arrow R is defined as "right". In addition, the direction of the arrow U shown in Figures 2 to 6, 8, and 12 is defined as "up", and the direction of the arrow D is defined as "down".

[0032] [Overall configuration of sheet cutting device] 1 to 3, the sheet cutting device K includes a main body 1. The main body 1 includes an upper main body 3, a lower main body 4, and a connecting portion 5.

[0033] The upper body portion 3 and the lower body portion 4 are both horizontally oriented plate-like members. The lower body portion 4 is located lower than the upper body portion 3.

[0034] The connecting part 5 is located at the right end of the main body part 1. The connecting part 5 is sandwiched between the upper main body part 3 and the lower main body part 4. The upper main body part 3, the connecting part 5, and the lower main body part 4 are fastened to each other by a plurality of fasteners while overlapping in the vertical direction. In this way, the connecting part 5 connects the upper main body part 3 and the lower main body part 4.

[0035] That is, the main body portion 1 has an upper main body portion 3, a lower main body portion 4 located below the upper main body portion 3, and a connecting portion 5 connecting the upper main body portion 3 and the lower main body portion 4.

[0036] Further, the sheet cutting device K includes a plurality of protruding parts 7. In this embodiment, the number of the protruding parts 7 is two. However, the present invention is not limited to this, and the number of the protruding parts 7 may be one, or any number of three or more.

[0037] The protrusion 7 is supported by the upper main body portion 3. The protrusion 7 protrudes downward beyond the lower surface of the upper main body portion 3.

[0038] That is, the protrusion 7 is supported by the upper main body portion 3 and is disposed in a state where it protrudes downward from the upper main body portion 3 .

[0039] A grip portion 8 is attached to the top surface of the upper main body portion 3. The grip portion 8 extends in the front-rear direction and is configured so as to be grippable by an operator.

[0040] That is, a gripping portion 8 that can be gripped by an operator is attached to the upper main body portion 3.

[0041] As shown in FIG. 1, grip portion 8 is disposed on the side of connecting portion 5 where protruding portion 7 is located in plan view.

[0042] 1 to 3, in this embodiment, the protrusion 7 is a roller. The protrusion 7 is configured to be rotatable around an axis P along the left-right direction. Note that, as shown in Figs. 2 and 3, the axis P is located above the top surface of the upper main body portion 3.

[0043] [About cutting the first sheet material] The following describes cutting of the first sheet S1 (corresponding to the "sheet material" of the present invention) using the sheet cutting device K. The first sheet S1 is, for example, a waterproof sheet laid on the roof of a building or a waterproof sheet laid on the inner surface of a swimming pool.

[0044] Of course, the first sheet S1 to be cut by the sheet cutting device K is not limited to the waterproof sheet laid in the above-mentioned situation, but may be a waterproof sheet installed in another location, or other sheet material (including non-waterproof sheets) to be cut in a completely different environment.

[0045] Fig. 4 shows a parapet portion on a roof. In the example shown in Fig. 4, a rising wall 11 is integrally formed on the outer edge portion of a roof slab 10. A second sheet S2 is laid on the roof slab 10 along the flat slab surface.

[0046] Meanwhile, the first sheet S1 is adhered to the inner peripheral surface of the rising wall 11. By bonding the lower edge of the first sheet S1 integrally onto the edge of the second sheet S2, a continuous waterproof layer is formed across the roof slab 10 and the rising wall 11, as shown in FIG.

[0047] The sheet cutting device K can be used to trim the bottom edge of the first sheet S1 before gluing it onto the second sheet S2.

[0048] 3 and 4, a sheet insertion space 9 is formed between the upper body portion 3 and the lower body portion 4. The lower edge of the first sheet S1 can be inserted into the sheet insertion space 9.

[0049] That is, between the upper main body portion 3 and the lower main body portion 4, a sheet insertion space 9 is formed, into which the first sheet S1 can be inserted.

[0050] 1 and 4, the upper main body portion 3 has a contact portion 12. The contact portion 12 is formed at the left end of the upper main body portion 3. The contact portion 12 is capable of contacting a wall surface E of a building. In this example, the surface of a portion of the first sheet S1 that covers the inner peripheral surface of the rising wall 11 forms the wall surface E of the building.

[0051] However, the present invention is not limited to this, and the contact portion 12 may be formed only on the lower body portion 4 out of the upper body portion 3 and the lower body portion 4, or it may be formed on both the upper body portion 3 and the lower body portion 4.

[0052] That is, at least one of the upper main body portion 3 and the lower main body portion 4 has a contact portion 12 that can come into contact with a wall surface E of a building.

[0053] 2 to 4, the sheet cutting device K includes a cutting member 2. The cutting member 2 is configured to be able to cut the first sheet S1. The cutting member 2 is supported by the main body 1.

[0054] That is, the sheet cutting device K includes a cutting member 2 that cuts the first sheet S1 and a main body portion 1 that supports the cutting member 2.

[0055] 3, 4 and 6, the lower end of the cutting member 2 is located in the sheet insertion space 9. However, the present invention is not limited to this, and the entire cutting member 2 may be located in the sheet insertion space 9.

[0056] That is, at least a portion of the cutting member 2 is located in the sheet insertion space 9 .

[0057] 4, the protruding portion 7 is located on the side of the cutting member 2 where the contact portion 12 is located when viewed in a direction along the cutting direction of the first sheet S1 by the cutting member 2. The protruding portion 7 protrudes so as to press the first sheet S1 in the up-down direction.

[0058] In this embodiment, the protruding portion 7 protrudes so as to press the first sheet S1 downward. However, the present invention is not limited to this, and the protruding portion 7 may be supported by the lower main body portion 4 and may protrude so as to press the first sheet S1 upward.

[0059] That is, the sheet cutting device K is provided with a protrusion 7 which is located on the side of the cutting member 2 where the contact portion 12 is located when viewed in a direction along the cutting direction of the first sheet S1 by the cutting member 2 and which protrudes so as to press the first sheet S1 in the vertical direction.

[0060] With the above configuration, as shown in Figures 1 and 4, when the first sheet S1 is inserted into the sheet insertion space 9 and the contact portion 12 is in contact with the wall surface E, the sheet cutting device K can be moved along the wall surface E, and the first sheet S1 can be cut by the cutting member 2.

[0061] In this specification, as shown in FIG. 1, the cutting direction of the sheet cutting device K is the front-rear direction.

[0062] In the example shown in FIG. 4 and FIG. 5, the excess portion of the first sheet S1 overlaps the second sheet S2, and the end of the excess portion is cut by the sheet cutting device K. However, the present invention is not limited to this. The excess portion of the second sheet S2 may overlap the portion of the first sheet S1 that covers the inner peripheral surface of the rising wall 11. In this case, the excess portion of the second sheet S2 stands vertically. In this case, if the sheet cutting device K is in a vertically standing state, the excess portion of the second sheet S2 can be inserted into the sheet insertion space 9 and the end of the excess portion can be cut by moving the sheet cutting device K in the cutting direction. The sheet cutting device K of this embodiment is relatively compact and easy to handle, so that such an operation can be easily performed.

[0063] In addition, the state in which the sheet cutting device K is upright is a state in which the bottom surface of the lower main body portion 4 is in contact with the wall surface E and the contact portion 12 is in contact with the upper surface of the portion of the second sheet S2 that covers the roof slab 10.

[0064] [Regarding the retention mechanism] 1 to 3, a holding mechanism 6 is provided on the main body 1. The holding mechanism 6 holds the cutting member 2.

[0065] That is, the main body 1 is provided with a holding mechanism 6 for holding the cutting member 2.

[0066] As shown in Fig. 6, the holding mechanism 6 has a support part 13 and a clamping part 14. The support part 13 is a plate-like member in a vertical position. The support part 13 has a recessed part 19 (see Figs. 6 and 9). The recessed part 19 is recessed in the thickness direction of the support part 13. The recessed part 19 has a shape that fits the outer shape of the cutting member 2.

[0067] The cutting member 2 is supported by the support portion 13 by fitting the cutting member 2 into the recess 19. In addition, when the cutting member 2 is supported by the support portion 13, the lower end portion of the cutting member 2 protrudes downward beyond the lower end of the support portion 13.

[0068] As shown in Fig. 6, the clamping portion 14 includes two L-shaped members 15 facing each other. Each L-shaped member 15 is fixed to the upper surface of the upper main body portion 3 by welding. However, the present invention is not limited to this, and each L-shaped member 15 may be fixed to the upper surface of the upper main body portion 3 by a method other than welding (for example, a fixing method using screws, bolts, and nuts). In addition, the support portion 13 is clamped between the vertical plate portions of each L-shaped member 15.

[0069] That is, the holding mechanism 6 has a support part 13 that supports the cutting member 2 and a clamping part 14 that clamps the support part 13.

[0070] Of the two L-shaped members 15, a nut 17 is fixed to the right L-shaped member 15. If the nut 17 is fixed to the L-shaped member 15 by welding, it is possible to prevent the nut 17 from being lost. A bolt 16 is inserted from the left side of the left L-shaped member 15. The bolt 16 is attached in a state in which it penetrates the left L-shaped member 15, the cutting member 2, the support portion 13, the right L-shaped member 15, and the nut 17. The support portion 13 and the cutting member 2 are attached to the upper main body portion 3 by fastening the bolt 16 to the nut 17.

[0071] As a result, the cutting member 2 is supported by the upper main body portion 3. Furthermore, as shown in Fig. 6, the cutting member 2 is disposed in a state in which it extends downward from the upper main body portion 3.

[0072] That is, the cutting member 2 is supported by the upper main body portion 3 and is disposed in a state of extending downward from the upper main body portion 3.

[0073] Here, the support part 13, in a state detached from the clamping part 14, can be changed in position between a first position shown on the left side of Fig. 7 and a second position shown on the right side of Fig. 7 by rotating it about a first rotation axis Q1 along the up-down direction. The second position is a position that is reversed from the first position to the left.

[0074] That is, when the support portion 13 is detached from the clamping portion 14, it can be rotated around a first rotation axis Q1 along the vertical direction, thereby changing its position between a first position and a second position which is an inverted position relative to the first position.

[0075] 6, the first rotation axis Q1 is located at the center of the support part 13 in the left-right direction. Note that the first rotation axis Q1 is also located at the center of the support part 13 in the front-rear direction.

[0076] The support part 13 shown in Fig. 6 is in the first position. Then, as shown in Fig. 7, the support part 13 is removed from the clamping part 14, inverted from the first position to the second position, and then attached to the clamping part 14, and the bolt 16 and the nut 17 are fastened, so that the support part 13 is in the state shown in Fig. 8. The support part 13 shown in Fig. 8 is in the second position.

[0077] As shown in Figs. 6 and 8, the clamping portion 14 is configured to be able to clamp the support portion 13 whether the support portion 13 is in the first position or the second position.

[0078] 6, when viewed in the cutting direction of the sheet cutting device K, the distance between the cutting member 2 and the first rotation axis Q1 is a predetermined distance W. That is, when viewed in the cutting direction, the cutting member 2 is disposed at a position spaced a predetermined distance W from the first rotation axis Q1.

[0079] As shown in Figures 6 and 8, the position of the cutting member 2 relative to the upper body part 3 when the support part 13 is in the second position is to the right of the position of the cutting member 2 relative to the upper body part 3 when the support part 13 is in the first position.

[0080] With this configuration, the holding mechanism 6 is configured to be able to change the position of the cutting member 2 relative to the main body 1. More specifically, the holding mechanism 6 is configured to be able to change the position of the cutting member 2 relative to the main body 1 by changing the attitude of the support part 13 between a first attitude and a second attitude.

[0081] In Fig. 11, the cutting member 2 when the support part 13 is in the first position is shown by a solid line. Also, the cutting member 2 when the support part 13 is in the second position is shown by a virtual line. When the support part 13 is in the first position, the distance between the contact part 12 and the cutting edge of the cutting member 2 in a plan view is a first distance D1. Also, when the support part 13 is in the second position, the distance between the contact part 12 and the cutting edge of the cutting member 2 in a plan view is a second distance D2. The second distance D2 is longer than the first distance D1.

[0082] In this manner, the sheet cutting device K is configured such that the distance between the contact portion 12 and the cutting member 2 in a plan view changes as the position of the cutting member 2 is changed.

[0083] 6 and 9, a throttle portion 18 is formed on the upper portion of the support portion 13. The throttle portion 18 is a groove-shaped portion extending horizontally. The throttle portion 18 is formed on both the surface of the support portion 13 on which the recessed portion 19 is provided and the surface on which the recessed portion 19 is not provided.

[0084] [About cutting materials] 9, the cutting member 2 has a polygonal plate shape. That is, the cutting member 2 is attached to the upper main body portion 3 and has a polygonal shape.

[0085] More specifically, the cutting member 2 in this embodiment has a rectangular plate shape composed of four sides: a first side 21, a second side 22, a third side 23, and a fourth side 24. However, the present invention is not limited to this, and the shape of the cutting member 2 may be any polygon other than a rectangle.

[0086] 9, the cutting member 2 is provided with a first blade portion 31 (corresponding to the "blade portion" according to the present invention), a second blade portion 32 (corresponding to the "blade portion" according to the present invention), a third blade portion 33 (corresponding to the "blade portion" according to the present invention), and a fourth blade portion 34 (corresponding to the "blade portion" according to the present invention) at positions corresponding to the first side 21, the second side 22, the third side 23, and the fourth side 24, respectively. The first blade portion 31, the second blade portion 32, the third blade portion 33, and the fourth blade portion 34 are all capable of cutting the first sheet S1 (see FIG. 1).

[0087] That is, in the cutting member 2, a first blade portion 31, a second blade portion 32, a third blade portion 33, and a fourth blade portion 34 are provided at positions corresponding to all sides of the above-mentioned polygon, respectively.

[0088] In particular, the first blade portion 31 and the second blade portion 32 are provided at locations on the cutting member 2 that correspond to the first side 21 and the second side 22, which are two adjacent sides of the above-mentioned polygon. That is, the first blade portion 31 and the second blade portion 32 capable of cutting the first sheet S1 are provided at locations on the cutting member 2 that correspond to the two adjacent sides of the above-mentioned polygon.

[0089] 9, the cutting member 2 has a first corner 35, a second corner 36, a third corner 37, and a fourth corner 38. The first corner 35 is a corner corresponding to the corner between the first side 21 and the second side 22. The second corner 36 is a corner corresponding to the corner between the second side 22 and the third side 23. The third corner 37 is a corner corresponding to the corner between the third side 23 and the fourth side 24. The fourth corner 38 is a corner corresponding to the corner between the fourth side 24 and the first side 21.

[0090] 9, the cutting member 2 is provided with the first corner 35 facing downward. That is, the cutting member 2 is provided with the corner corresponding to the corner sandwiched between the above-mentioned two sides (the first side 21 and the second side 22) facing downward.

[0091] 9 and 10, when the cutting member 2 is fitted into the recess 19, the position of the cutting member 2 supported by the support portion 13 can be changed around the second rotation axis Q2. The second rotation axis Q2 passes through the center of the polygon described above. That is, the second rotation axis Q2 passes through the center of a quadrangle formed by the four sides, the first side 21, the second side 22, the third side 23, and the fourth side 24.

[0092] When the orientation of the cutting member 2 is changed around the second rotation axis Q2, the mounting orientation of the cutting member 2 to the upper main body 3 changes around the second rotation axis Q2. That is, the cutting member 2 is configured so that the mounting orientation of the cutting member 2 to the upper main body 3 can be changed around the second rotation axis Q2 that passes through the center of the above-mentioned polygon.

[0093] For example, in the state shown on the left side of Fig. 10, the cutting member 2 is in a position in which the first corner 35 faces downward. In this state, when the sheet cutting device K is moved to one side in the cutting direction, the first blade portion 31 acts on the first sheet S1 to cut the first sheet S1. When the sheet cutting device K is moved to the other side in the cutting direction, the second blade portion 32 acts on the first sheet S1 to cut the first sheet S1.

[0094] Then, when the cutting member 2 is rotated 90° clockwise around the second rotation axis Q2, the cutting member 2 is in the state shown on the right side of Fig. 10. In this state, the cutting member 2 is in a position in which the second corner 36 faces downward. In this state, when the sheet cutting device K is moved to one side in the cutting direction, the second blade portion 32 acts on the first sheet S1 to cut the first sheet S1. When the sheet cutting device K is moved to the other side in the cutting direction, the third blade portion 33 acts on the first sheet S1 to cut the first sheet S1.

[0095] [Regarding the lower body part] 6 and 11, a recess 41 recessed downward is formed on the upper surface of the lower main body part 4. As shown in Fig. 11, the recess 41 is formed in a portion overlapping with the cutting member 2 in a plan view. In this embodiment, the recess 41 overlaps with both the cutting member 2 when the support part 13 is in the first position and the cutting member 2 when the support part 13 is in the second position in a plan view.

[0096] That is, on the upper surface of the lower main body portion 4, a recess 41 recessed downward is formed in a portion overlapping with the cutting member 2 in a plan view.

[0097] 11, each protrusion 7 is located to the left of the left end of the lower main body portion 4. Therefore, the lower main body portion 4 does not overlap with the protrusion 7 in a plan view.

[0098] As shown in FIG. 11, the gripping portion 8 is disposed between the cutting member 2 and the connecting portion 5 in a plan view.

[0099] As shown in Fig. 12, a chamfered portion 42 is formed at the lower end of the front end of the lower main body portion 4. Although not shown in Fig. 12, a chamfered portion 42 is also formed at the lower end of the rear end of the lower main body portion 4.

[0100] However, the present invention is not limited to this. The chamfered portion 42 may be formed only on the lower end portion of the front end portion of the lower main body portion 4, or may be formed only on the lower end portion of the rear end portion of the lower main body portion 4.

[0101] That is, a chamfered portion 42 is formed on at least one lower end of both ends of the lower main body portion 4 in the cutting direction of the sheet cutting device K.

[0102] The chamfered portion 42 at the front end of the lower main body portion 4 is a surface that slopes upward toward the front. The chamfered portion 42 at the rear end of the lower main body portion 4 is a surface that slopes upward toward the rear. Note that the chamfered portion 42 does not have to be formed linearly as shown in Fig. 12, and may be rounded, for example.

[0103] According to the configuration described above, the first sheet S1 is pressed upward or downward by the protruding portion 7. This makes it easier to prevent the first sheet S1 from flapping. Therefore, according to the configuration described above, it is possible to realize a sheet cutting device K that can easily prevent the first sheet S1 from flapping and can perform high-precision cutting regardless of the skill of the operator.

[0104] Other embodiments (1) The protruding portion 7 does not have to be a roller as long as it protrudes so as to press the first sheet S1. For example, the protruding portion 7 may be a protruding member fixed to the lower surface of the upper main body portion 3.

[0105] (2) The cutting member 2 may be attached to the lower body portion 4.

[0106] (3) The cutting member 2 may be configured so as not to be detachable from the main body 1.

[0107] (4) The position of the cutting member 2 relative to the main body 1 may be configured not to be changeable.

[0108] (5) The number of blades provided on the cutting member 2 may be one, or may be any number of two or more.

[0109] (6) The cutting member 2 does not have to have a polygonal shape. For example, the cutting member 2 may be circular.

[0110] (7) The upper body portion 3 does not have to be plate-shaped. For example, the upper body portion 3 may be a frame structure made up of a plurality of frame members.

[0111] (8) The lower body portion 4 does not have to be plate-shaped. For example, the lower body portion 4 may be a frame structure made up of a plurality of frame members.

[0112] (9) A friction reduction portion that reduces friction with the first sheet S1, the second sheet S2, etc. may be provided on the contact portion 12 or the bottom surface of the lower main body portion 4. The friction reduction portion may be made of, for example, resin, etc.

[0113] The configurations disclosed in the above-mentioned embodiments (including other embodiments, the same applies below) can be applied in combination with configurations disclosed in other embodiments, unless a contradiction occurs. In addition, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these embodiments, and can be appropriately modified within the scope of the present invention. [Industrial Applicability]

[0114] The present invention can be used in a sheet cutting device for cutting sheet material. [Explanation of symbols]

[0115] 1 Main unit 2 Cutting material 3 Upper body part 4 Lower body part 5 Joint 6 Retention mechanism 7 Protrusion 8 Gripping part 9 Seat insertion space 12 Contact part 13 Support part 14 Clamping part 31 1st blade part (blade part) 32 2nd blade part (blade part) 33 Third blade part (blade part) 34 4th blade part (blade part) 41 Recess 42 Chamfered part E Wall K sheet cutting device Q1 First rotating shaft Q2 Second rotating shaft S1 1st sheet (sheet material) W Predetermined interval

Claims

1. A cutting member for cutting the sheet material; a body portion supporting the cutting member; The main body portion has an upper main body portion, a lower main body portion located below the upper main body portion, and a connecting portion connecting the upper main body portion and the lower main body portion, A sheet insertion space into which the sheet material can be inserted is formed between the upper body portion and the lower body portion, At least a portion of the cutting member is located in the sheet insertion space, At least one of the upper main body portion and the lower main body portion has an abutment portion that can abut against a wall surface of a building, a protruding portion is provided which is located on the side of the cutting member where the contact portion is located when viewed in a direction along the cutting direction of the sheet material by the cutting member and which protrudes so as to press the sheet material in the up and down direction, The protrusion is provided on the upper body portion of the sheet cutting device.

2. The main body is provided with a holding mechanism for holding the cutting member, The holding mechanism is configured to be able to change a position of the cutting member relative to the main body, The sheet cutting device according to claim 1 , wherein the cutting member is configured to change a position thereof, so that a distance between the contact portion and the cutting member in a plan view changes.

3. A cutting member for cutting a sheet material; a body portion supporting the cutting member; The main body portion has an upper main body portion, a lower main body portion located below the upper main body portion, and a connecting portion connecting the upper main body portion and the lower main body portion, A sheet insertion space into which the sheet material can be inserted is formed between the upper body portion and the lower body portion, At least a portion of the cutting member is located in the sheet insertion space, At least one of the upper main body portion and the lower main body portion has an abutment portion that can abut against a wall surface of a building, a protruding portion is provided which is located on the side of the cutting member where the contact portion is located when viewed in a direction along the cutting direction of the sheet material by the cutting member and which protrudes so as to press the sheet material in the up and down direction, The main body is provided with a holding mechanism for holding the cutting member, The holding mechanism is configured to be able to change a position of the cutting member relative to the main body, The cutting member is configured to change a distance between the contact portion and the cutting member in a plan view by changing a position of the cutting member, The holding mechanism includes a support portion that supports the cutting member and a clamping portion that clamps the support portion, the support portion is detached from the clamping portion and is rotated around a first rotation axis along a vertical direction, so that the support portion can be changed in position between a first position and a second position that is an inverted position relative to the first position, the clamping portion is configured to be able to clamp the support portion regardless of whether the support portion is in the first position or the second position, The cutting member is disposed at a position spaced a predetermined distance from the first rotation axis when viewed in a direction along the cutting direction, The sheet cutting device is configured such that the holding mechanism can change the position of the cutting member relative to the main body by changing the attitude of the support part between the first attitude and the second attitude.

4. the cutting member is attached to the upper body portion and has a polygonal shape; the cutting member is provided with blade portions capable of cutting the sheet material at locations corresponding to two adjacent sides of the polygon, The sheet cutting device according to claim 1 , wherein the cutting member is provided with a corner portion corresponding to the corner between the two sides facing downward.

5. The cutting member is provided with the blade portions at locations corresponding to all sides of the polygon, The sheet cutting device according to claim 4 , wherein the cutting member is configured so that an attachment attitude of the cutting member to the upper main body portion can be changed around a second rotation axis passing through a center of the polygon.

6. A cutting member for cutting a sheet material; a body portion supporting the cutting member; The main body portion has an upper main body portion, a lower main body portion located below the upper main body portion, and a connecting portion connecting the upper main body portion and the lower main body portion, A sheet insertion space into which the sheet material can be inserted is formed between the upper body portion and the lower body portion, At least a portion of the cutting member is located in the sheet insertion space, At least one of the upper main body portion and the lower main body portion has an abutment portion that can abut against a wall surface of a building, a protruding portion is provided which is located on the side of the cutting member where the contact portion is located when viewed in a direction along the cutting direction of the sheet material by the cutting member and which protrudes so as to press the sheet material in the up and down direction, The cutting member is supported by the upper body portion and is disposed so as to extend downward from the upper body portion, A recess is formed on the upper surface of the lower main body portion at a portion overlapping with the cutting member in a plan view, the recess being recessed downward; The recess does not extend through the lower body portion and has a bottom.

7. A gripping portion that can be gripped by an operator is attached to the upper body portion, The protrusion is supported by the upper main body portion and is disposed in a state of protruding downward from the upper main body portion, The sheet cutting device according to claim 1 , wherein the gripping portion is disposed on a side of the connecting portion where the protruding portion is located in a plan view.

8. The sheet cutting device according to claim 7 , wherein the lower body portion does not overlap with the protruding portion in a plan view.

9. The sheet cutting device according to claim 7 or 8, wherein the gripping portion is disposed between the cutting member and the connecting portion in a plan view.

10. The sheet cutting device according to claim 1 , wherein the protrusion is a roller.

11. The sheet cutting device according to claim 1 , wherein a chamfer is formed on at least one lower end of both ends of the lower main body portion in the cutting direction.

Images