JP2023066498A - sheet cutting device - Google Patents

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

The present invention relates to a sheet cutting device for cutting sheet material.

As a sheet cutting device as described above, for example, the one described in Japanese Patent Application Laid-Open No. 2002-300001 is already known. This sheet cutting device includes a cutting member (“cutting blade” in Patent Document 1) that cuts a sheet material, and a contact portion that can contact a wall surface of a building. In Patent Document 1, the surface on the inner peripheral side of the rising wall on the roof of the building is covered with a sheet material. Therefore, the surface of the portion of the sheet material that covers the inner surface of the rising wall serves as the wall surface of the building.

JP 2009-165742 A

In the sheet cutting device described in Patent Document 1, the portion of the sheet material on the side where the cutting member is positioned relative to the portion with which the abutting portion is in contact (in other words, the inside corner portion of the sheet material and the It is assumed that flapping (that is, twisting, wrinkling, lifting, etc.) occurs in the portion closer to the edge of the sheet material than the inside corner portion. As a result, depending on the skill of the operator, it is assumed that the accuracy of the cutting position will be lowered.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet cutting device that can easily suppress fluttering of a sheet material and can cut the sheet material with high precision regardless of the skill of the operator.

A feature of the present invention is that it includes a cutting member that cuts a sheet material, and a main body portion that supports the cutting member, and the main body portion includes an upper main body portion and a lower main body portion positioned below the upper main body portion. It has a side body portion and a connecting portion that connects the upper body portion and the lower body portion, and the sheet material can be inserted between the upper body portion and the lower body portion. A sheet insertion space, which is a space, is formed, at least part of the cutting member is positioned in the sheet insertion space, and at least one of the upper body portion and the lower body portion is attached to a wall surface of a building. and is located on the side of the cutting member on which the contact portion is located when viewed along the cutting direction of the sheet material by the cutting member, and the sheet material is provided with a protruding portion that protrudes so as to press the .

According to this configuration, the sheet material is pressed upward or downward by the projecting portion. This makes it easy to suppress fluttering of the sheet material. Therefore, according to this configuration, it is possible to realize a sheet cutting device that can easily suppress fluttering of the sheet material and can cut the sheet material with high precision regardless of the skill of the operator.

Further, in the present invention, a holding mechanism for holding the cutting member is provided in the main body, and the holding mechanism is configured to be able to change the position of the cutting member with respect to the main body. It is preferable that the distance between the contact portion and the cutting member in plan view is changed by changing the position of the member.

In the conventional sheet cutting device, the cutting position of the sheet member could not be changed. Therefore, depending on the structure of the building, the situation of work, etc., the cutting position of the sheet member may not be optimal.

Here, according to this configuration, it is possible to change the distance between the contact portion and the cutting member in plan view. Accordingly, it is possible to realize a sheet cutting device capable of changing the cutting position of the sheet member depending on the situation.

Further, in the present invention, the holding mechanism has a support portion that supports the cutting member and a clamping portion that clamps the support portion, and the support portion is removed from the clamping portion. and by rotating it around a first rotational axis along the vertical direction, it is possible to change the posture between a first posture and a second posture that is an inverted posture with respect to the first posture; The holding portion is configured to be able to hold the support portion regardless of whether the support portion is in the first posture or the second posture. wherein the holding mechanism is arranged at a position spaced apart by a predetermined distance from the first rotation axis, and the holding mechanism changes the orientation of the support portion between the first orientation and the second orientation. It is preferable that the position of the cutting member with respect to the main body portion can be changed by.

According to this configuration, it is possible to change the distance between the contact portion and the cutting member in plan view only by changing the posture of the support portion between the first posture and the second posture. Accordingly, a sheet cutting device capable of easily changing the cutting position of the sheet member can be realized.

Further, in the present invention, the cutting member is attached to the upper body part and has a polygonal shape, corresponding to two sides of the polygon that are adjacent to each other in the cutting member. A blade portion capable of cutting the sheet material is provided at each portion, and the cutting member is provided with a corner portion corresponding to the corner sandwiched between the two sides directed downward. It is preferable to have

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

Further, in the present invention, the cutting member is provided with the blade portions at portions corresponding to all the sides of the polygon, and the cutting member is attached to the upper body portion. can be changed around a second rotation axis passing through the center of the polygon.

According to this configuration, when one of the blades is worn, simply changing the mounting posture of the cutting member causes another blade to be positioned at the position where the worn blade was positioned. . This makes it possible to easily replace a worn blade with a blade that has not yet worn.

Further, in the present invention, the cutting member is supported by the upper body portion and is arranged in a state of extending downward from the upper body portion. It is preferable that a recessed portion recessed downward is formed in a portion overlapping with the cutting member.

According to this configuration, even if the lower end position 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, by positioning the lower end of the cutting member at a relatively low position, it is possible to realize a sheet cutting device that facilitates avoiding interference between the cutting member and the lower main body portion while improving the cutting state of the sheet material. It becomes possible.

Further, in the present invention, a grasping portion that can be grasped by a worker is attached to the upper body portion, and the projecting portion is supported by the upper body portion and directed downward from the upper body portion. It is preferable that the holding portion is arranged on the side where the projecting portion is located with respect to the connecting portion in a plan view.

According to this configuration, when the operator applies downward force to the grip portion, the upper body portion tends to bend downward. Then, when the upper main body bends downward, the projecting portion moves downward. As a result, the pressing action of the sheet material by the projecting portion is likely to be exhibited reliably.

Furthermore, in the present invention, it is preferable that the lower body portion does not overlap the projecting portion in a plan view.

In a structure in which the lower body part overlaps the projection part in plan view, a portion of the sheet material pressed by the projection part is sandwiched between the projection part and the upper surface of the lower body part. As a result, a relatively large frictional force tends to occur between the sheet material and the sheet cutting device. This makes it difficult to smoothly move the sheet cutting device along the wall surface.

Here, according to this configuration, the portion of the sheet material pressed by the projecting portion is not sandwiched between the projecting portion and the upper surface of the lower main body portion. Therefore, it is easy to avoid a situation in which relatively large friction occurs between the sheet material and the sheet cutting device. This facilitates smooth movement of the sheet cutting device along the wall surface.

Furthermore, in the present invention, it is preferable that the gripping portion is arranged between the cutting member and the connecting portion in plan view.

According to this configuration, the gripping portion, the cutting member, and the connecting portion are arranged in the front-rear direction (cutting direction of the sheet material) compared to the case where the gripping portion is positioned in front or behind the cutting member or the connecting portion in a plan view. Compact and easy to fit. Therefore, it is possible to shorten the front-to-rear length of the sheet cutting device. As a result, it is possible to realize a sheet cutting device that is compact and easy to handle.

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

According to this configuration, it is easy to avoid a situation in which relatively large friction occurs between the projecting portion and the sheet material. This facilitates smooth movement of the sheet cutting device along the wall surface.

Furthermore, in the present invention, it is preferable that a chamfered portion is formed on at least one lower end portion of both end portions of the lower main body portion in the cutting direction.

According to this configuration, the lower main body portion is less likely to get caught on the irregularities of the base during the cutting operation of the sheet material. Therefore, it becomes easier to smoothly move the sheet cutting device along the wall surface.

1 is a plan view of a sheet cutting device; FIG. FIG. 3 is a left side view of the sheet cutting device; 4 is a rear view of the sheet cutting device; FIG. 4 is a rear view of the sheet cutting device; FIG. FIG. 4 is a longitudinal sectional view showing a state in which installation of the first sheet is completed; FIG. 4 is a longitudinal rear view showing the configuration of a holding mechanism and the like; It is a figure which shows the attitude|position change of a support part. FIG. 4 is a longitudinal rear view showing the configuration of a holding mechanism and the like; It is a figure which shows the structure of a cutting member and a support part. It is a figure which shows the attitude|position change of a cutting member. It is a top view which shows the structure, such as a lower main-body part. It is a left view which shows the structure, such as a chamfer.

A mode for carrying out the present invention will be described based on the drawings. In the following description, unless otherwise specified, the direction of arrow F shown in FIGS. 3 to 6, 8, and 11 is defined as "left", and the direction of arrow R is defined as "right". The direction of arrow U shown in FIGS. 2 to 6, 8, and 12 is defined as "up", and the direction of arrow D is defined as "down".

[Overall Configuration of Sheet Cutting Device]
As shown in FIGS. 1 to 3, the sheet cutting device K has a main body 1. As shown in FIG. The body portion 1 has an upper body portion 3 , a lower body portion 4 and a connecting portion 5 .

Both the upper main body portion 3 and the lower main body portion 4 are plate-shaped members in a horizontal posture. The lower body portion 4 is positioned below the upper body portion 3 .

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

That is, the main body portion 1 includes 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 that connects the upper main body portion 3 and the lower main body portion 4. have.

The sheet cutting device K also includes a plurality of projecting portions 7 . In addition, in this embodiment, the number of protrusions 7 provided is two. However, the present invention is not limited to this, and the number of protrusions 7 provided may be one or any number of three or more.

The projecting portion 7 is supported by the upper body portion 3 . The protruding portion 7 protrudes downward from the lower surface of the upper body portion 3 .

That is, the protruding portion 7 is supported by the upper body portion 3 and arranged in a state of protruding downward from the upper body portion 3 .

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

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

As shown in FIG. 1 , the gripping portion 8 is arranged on the side where the projecting portion 7 is positioned with respect to the connecting portion 5 in plan view.

Moreover, as shown in FIGS. 1 to 3, in this embodiment, the projecting portion 7 is a roller. The projecting portion 7 is configured to be rotatable around an axis P extending in the left-right direction. In addition, as shown in FIGS. 2 and 3 , the axis P is located above the upper surface of the upper body portion 3 .

[About cutting the first sheet material]
Cutting of the first sheet S1 (corresponding to the "sheet material" according to the present invention) using the sheet cutting device K will be described below. The first sheet S1 is, for example, a waterproof sheet laid on the roof of a building, a waterproof sheet laid on the inner surface of a swimming pool, or the like.

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-described scene, and may be a waterproof sheet installed in another location or in a completely different environment. Other sheet material (including non-waterproof sheets) to be cut below may be used.

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

On the other hand, the first sheet S<b>1 is adhered to the inner peripheral surface of the rising wall 11 . By bonding and integrating the lower edge of the first sheet S1 onto the edge of the second sheet S2, as shown in FIG. It is formed.

The sheet cutting device K can be used to trim the lower edge of the first sheet S1 prior to gluing the first sheet S1 onto the second sheet S2.

As shown in FIGS. 3 and 4 , a sheet insertion space 9 is formed between the upper body portion 3 and the lower body portion 4 . A lower edge portion of the first sheet S<b>1 can be inserted into the sheet insertion space 9 .

That is, a sheet insertion space 9, which is a space into which the first sheet S1 can be inserted, is formed between the upper body portion 3 and the lower body portion 4. As shown in FIG.

As shown in FIGS. 1 and 4 , the upper body portion 3 has a contact portion 12 . The contact portion 12 is formed at the left end of the upper body portion 3 . The contact portion 12 can contact the wall surface E of the building. In this example, the surface of the portion of the first sheet S1 that covers the inner surface of the rising wall 11 is the wall surface E of the building.

However, the present invention is not limited to this, and the contact portion 12 may be formed only in the lower main body portion 4 of the upper main body portion 3 and the lower main body portion 4. It may be formed on both of the lower body portions 4 .

That is, at least one of the upper body portion 3 and the lower body portion 4 has a contact portion 12 that can contact the wall surface E of the building.

As shown in FIGS. 2 to 4, the sheet cutting device K has a cutting member 2. As shown in FIG. The cutting member 2 is configured to cut the first sheet S1. Also, the cutting member 2 is supported by the body portion 1 .

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

As shown in FIGS. 3, 4, and 6, the lower end of the cutting member 2 is positioned in the sheet insertion space 9. As shown in FIGS. The present invention is not limited to this, and the cutting member 2 as a whole may be positioned in the sheet insertion space 9 .

That is, at least part of the cutting member 2 is located in the sheet insertion space 9. As shown in FIG.

As shown in FIG. 4 , the projecting portion 7 is located on the side of the cutting member 2 where the contact portion 12 is located when viewed along the cutting direction of the first sheet S1 by the cutting member 2 . Further, the protruding portion 7 protrudes so as to press the first sheet S1 in the vertical direction.

Incidentally, in the present embodiment, the projecting portion 7 projects 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 protrude so as to press the first sheet S1 upward.

That is, the sheet cutting device K is positioned on the side where the abutment portion 12 is positioned with respect to the cutting member 2 when viewed along the cutting direction of the first sheet S1 by the cutting member 2, and cuts the first sheet S1 in the vertical direction. A protruding portion 7 is provided to protrude so as to press it.

With the above configuration, as shown in FIGS. 1 and 4, 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 to cut the sheet. By moving the device K along the wall surface E, the first sheet S1 can be cut by the cutting member 2 .

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

In the examples shown in FIGS. 4 and 5, the surplus portion of the first sheet S1 overlaps the second sheet S2, and the edge of the surplus portion is cut by the sheet cutting device K. As shown in FIG. However, the invention is not so limited. The surplus portion of the second sheet S2 may be overlapped on the portion of the first sheet S1 that covers the inner peripheral surface of the rising wall 11 . In this case, the surplus portion of the second sheet S2 rises vertically. In this case, if the sheet cutting device K is set upright, the remaining portion of the second sheet S2 is inserted into the sheet insertion space 9, and the remaining portion of the second sheet S2 is moved in the cutting direction. The ends of the portion can be cut off. Since the sheet cutting device K of this embodiment is relatively compact and easy to handle, such work can be easily performed.

The state in which the sheet cutting device K is erected vertically means that the bottom surface of the lower body portion 4 is in contact with the wall surface E, and the upper surface of the portion of the second sheet S2 covering the roof slab 10 is in contact with the contact portion. 12 is in contact.

[Regarding the holding mechanism]
As shown in FIGS. 1 to 3, the body portion 1 is provided with a holding mechanism 6 . A holding mechanism 6 holds the cutting member 2 .

That is, a holding mechanism 6 for holding the cutting member 2 is provided in the body portion 1 .

As shown in FIG. 6 , the holding mechanism 6 has a support portion 13 and a holding portion 14 . The support portion 13 is a plate-shaped member that is in a vertical posture. The support portion 13 has a drop portion 19 (see FIGS. 6 and 9). The drop portion 19 is recessed in the thickness direction of the support portion 13 . Moreover, the drop portion 19 has a shape that follows the outer shape of the cutting member 2 .

The cutting member 2 is supported by the support portion 13 by fitting the cutting member 2 into the drop portion 19 . Further, in a state in which the cutting member 2 is supported by the support portion 13 , the lower end portion of the cutting member 2 protrudes below the lower end of the support portion 13 .

As shown in FIG. 6, the holding portion 14 includes two L-shaped members 15 facing each other. Each L-shaped member 15 is welded and fixed to the upper surface of the upper body portion 3 . 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 3 by a method other than welding (for example, a fixing method using screws, bolts and nuts). Also, the support portion 13 is sandwiched between the vertical plate portions of the L-shaped members 15 .

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

A nut 17 is fixed to the right L-shaped member 15 of the two L-shaped members 15 . In addition, when the nut 17 is welded and fixed to the L-shaped member 15, loss of the nut 17 can be prevented. A bolt 16 is inserted from the left side of the L-shaped member 15 on the left side. The bolt 16 is attached so as to pass through the L-shaped member 15 on the left side, the cutting member 2 , the support portion 13 , the L-shaped member 15 on the right side, and the nut 17 . The support part 13 and the cutting member 2 are attached to the upper body part 3 by fastening the bolts 16 and the nuts 17 .

Thereby, the cutting member 2 is supported by the upper body portion 3 . Moreover, as shown in FIG. 6, the cutting member 2 is arranged in a state of extending downward from the upper body portion 3 .

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

Here, the support portion 13 is removed from the holding portion 14 and rotated around the first rotation axis Q1 extending in the vertical direction to obtain the first posture shown on the left side of FIG. , the posture can be changed between the second posture shown in FIG. The second posture is a posture that is horizontally reversed with respect to the first posture.

That is, the support portion 13 is rotated around the first rotation axis Q1 extending in the vertical direction in a state of being removed from the clamping portion 14, so that the support portion 13 assumes a first posture and a posture reversed with respect to the first posture. The posture can be changed between the second posture and the second posture.

As shown in FIG. 6, the first rotation axis Q1 is positioned at the center of the support portion 13 in the left-right direction. Note that the first rotation axis Q1 is also located at the center of the support portion 13 in the front-rear direction.

The support portion 13 shown in FIG. 6 is in the first posture. Then, as shown in FIG. 7 , after removing the support portion 13 from the holding portion 14 and reversing it from the first posture to the second posture, it is attached to the holding portion 14 and the bolt 16 and the nut 17 are fastened. As a result, the support portion 13 is brought into the state shown in FIG. The support portion 13 shown in FIG. 8 is in the second posture.

As shown in FIGS. 6 and 8, the clamping portion 14 is configured to clamp the support portion 13 regardless of whether the support portion 13 is in the first posture or the second posture.

As shown in FIG. 6, the distance between the cutting member 2 and the first rotation axis Q1 is a predetermined distance W when viewed along the cutting direction of the sheet cutting device K. As shown in FIG. That is, the cutting member 2 is arranged at a position spaced a predetermined distance W from the first rotation axis Q1 when viewed along the cutting direction.

As shown in FIGS. 6 and 8, the position of the cutting member 2 with respect to the upper body portion 3 when the support portion 13 is in the second posture is similar to the position of the cutting member 2 with respect to the upper body portion 3 when the support portion 13 is in the first posture. It is on the right side of the position of the member 2 .

With this configuration, the holding mechanism 6 is configured to be able to change the position of the cutting member 2 with respect to the body portion 1 . More specifically, the holding mechanism 6 is configured to change the position of the cutting member 2 with respect to the main body 1 by changing the posture of the support portion 13 between the first posture and the second posture. .

Further, in FIG. 11, the cutting member 2 when the support portion 13 is in the first posture is indicated by a solid line. Also, the cutting member 2 when the support portion 13 is in the second posture is indicated by a phantom line. When the support portion 13 is in the first posture, the distance between the contact portion 12 and the cutting edge of the cutting member 2 in plan view is the first distance D1. Further, when the support portion 13 is in the second posture, the distance between the contact portion 12 and the cutting edge of the cutting member 2 in plan view is the second distance D2. The second distance D2 is longer than the first distance D1.

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 plan view changes as the position of the cutting member 2 is changed.

Further, as shown in FIGS. 6 and 9 , a narrowed portion 18 is formed on the upper portion of the support portion 13 . The narrowed portion 18 is a groove-shaped portion extending horizontally. A narrowed portion 18 is formed on both the surface on which the drop portion 19 is provided and the surface on which the drop portion 19 is not provided in the support portion 13 .

[About the cutting member]
As shown in FIG. 9, the cutting member 2 has a polygonal plate shape. That is, the cutting member 2 is attached to the upper body portion 3 and has a polygonal shape.

More specifically, the cutting member 2 in this embodiment has a quadrangular plate-like shape composed of four sides of a first side 21, a second side 22, a third side 23, and a fourth side 24. are doing. However, the present invention is not limited to this, and the shape of the cutting member 2 may be any polygon other than a quadrangle.

As shown in FIG. 9, in the cutting member 2, first blade portions 31 (" Equivalent to the "blade portion"), the second blade portion 32 (corresponding to the "blade portion" according to the present invention), the third blade portion 33 (corresponding to the "blade portion" according to the present invention), the fourth blade portion 34 (this (corresponding to the "blade portion" according to the invention) is provided. Each of the first blade portion 31, the second blade portion 32, the third blade portion 33, and the fourth blade portion 34 can cut the first sheet S1 (see FIG. 1).

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 portions corresponding to all the sides of the polygon. It is

In particular, in the cutting member 2, a first blade portion 31 and a second blade portion 32 are provided at portions corresponding to the first side 21 and the second side 22, which are two sides adjacent to each other, in the above-described polygon. is provided. That is, the cutting member 2 is provided with a first blade portion 31 and a second blade portion 32 capable of cutting the first sheet S1, respectively, at portions corresponding to two sides of the polygon that are adjacent to each other. ing.

Further, as shown in FIG. 9, the cutting member 2 has a first corner 35, a second corner 36, a third corner 37, and a fourth corner . The first corner 35 is a corner corresponding to the corner sandwiched between the first side 21 and the second side 22 . The second corner 36 is a corner corresponding to the corner sandwiched between the second side 22 and the third side 23 . The third corner 37 is a corner corresponding to the corner sandwiched between the third side 23 and the fourth side 24 . The fourth corner 38 is a corner corresponding to the corner sandwiched between the fourth side 24 and the first side 21 .

As shown in FIG. 9, the cutting member 2 is provided with the first corner portion 35 directed downward. That is, the cutting member 2 is provided in a state in which the corners corresponding to the corners sandwiched between the two sides (the first side 21 and the second side 22) are directed downward.

As shown in FIGS. 9 and 10, when the cutting member 2 is fitted into the drop-in portion 19, the posture 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 above polygon. That is, the second rotation axis Q2 passes through the center of the quadrangle formed by the four sides of the first side 21, the second side 22, the third side 23, and the fourth side 24. As shown in FIG.

When the posture of the cutting member 2 is changed around the second rotation axis Q2, the attachment posture to the upper body portion 3 changes around the second rotation axis Q2. That is, the cutting member 2 is configured such that the attachment posture to the upper body portion 3 can be changed around the second rotation axis Q2 passing through the center of the above-described polygon.

For example, in the state shown on the left side of FIG. 10, the cutting member 2 is in a posture in which the first corner portion 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. Further, 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.

Then, when the cutting member 2 is rotated clockwise by 90° around the second rotation axis Q2, the cutting member 2 enters the state shown on the right side of FIG. In this state, the cutting member 2 is in a posture in which the second corner portion 36 is directed 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. Further, 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.

[Regarding the lower body part]
As shown in FIGS. 6 and 11, the upper surface of the lower body portion 4 is formed with a concave portion 41 that is recessed downward. As shown in FIG. 11, the recess 41 is formed in a portion overlapping the cutting member 2 in plan view. In the present embodiment, the concave portion 41 is formed in both the cutting member 2 when the support portion 13 is in the first posture and the cutting member 2 when the support portion 13 is in the second posture in plan view. Duplicate.

That is, on the upper surface of the lower body portion 4, a concave portion 41 that is recessed downward is formed in a portion that overlaps with the cutting member 2 in plan view.

As shown in FIG. 11 , each projecting portion 7 is located on the left side of the left end of the lower body portion 4 . Therefore, the lower main body portion 4 does not overlap the projecting portion 7 in plan view.

Further, as shown in FIG. 11, the gripping portion 8 is arranged between the cutting member 2 and the connecting portion 5 in plan view.

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

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

That is, the chamfered portion 42 is formed on at least one lower end portion of both end portions of the lower body portion 4 in the cutting direction of the sheet cutting device K. As shown in FIG.

A chamfered portion 42 at the front end portion of the lower main body portion 4 is a surface that slopes forward upward. A chamfered portion 42 at the rear end portion of the lower main body portion 4 is a surface that slopes rearward upward. Note that the chamfered portion 42 may not be formed linearly as shown in FIG. 12, and may be rounded, for example.

According to the configuration described above, the protrusion 7 presses the first sheet S1 upward or downward. This makes it easy to suppress fluttering of the first sheet S1. Therefore, according to the configuration described above, it is possible to easily suppress fluttering of the first sheet S1, and realize the sheet cutting apparatus K capable of highly accurate cutting regardless of the skill of the operator.

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

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

(3) The cutting member 2 may be configured such that it cannot be removed from the body portion 1 .

(4) It may be configured such that the position of the cutting member 2 with respect to the body portion 1 cannot be changed.

(5) The number of blade portions provided on the cutting member 2 may be one, or any number of two or more.

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

(7) The upper body portion 3 does not have to be plate-like. For example, the upper body portion 3 may be a frame structure composed of a plurality of frame members.

(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 composed of a plurality of frame members.

(9) A friction reducing portion may be provided on the bottom surface of the contact portion 12 or the lower body portion 4 to reduce friction with the first sheet S1, the second sheet S2, or the like. The friction reducing portion can be made of resin or the like, for example.

It should be noted that the configurations disclosed in the above-described embodiments (including other embodiments; the same shall apply hereinafter) can be applied in combination with configurations disclosed in other embodiments unless there is a contradiction. Moreover, the embodiments disclosed in this specification are merely examples, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used for a sheet cutting device for cutting a sheet material.

REFERENCE SIGNS LIST 1 main body 2 cutting member 3 upper main body 4 lower main body 5 connecting part 6 holding mechanism 7 protruding part 8 gripping part 9 sheet insertion space 12 abutting part 13 supporting part 14 clamping part 31 first blade (blade part)
32 second blade (blade)
33 third blade (blade)
34 fourth blade (blade)
41 recessed portion 42 chamfered portion E wall surface K sheet cutting device Q1 first rotation axis Q2 second rotation axis S1 first sheet (sheet material)
W Predetermined interval

Claims (11)

a cutting member for cutting the sheet material;
a body portion that supports the cutting member,
The main body portion has an upper main body portion, a lower main body portion positioned below the upper main body portion, and a connecting portion that connects the upper main body portion and the lower main body portion,
A sheet insertion space, which is a space into which the sheet material can be inserted, is formed between the upper body portion and the lower body portion,
At least part of the cutting member is located in the sheet insertion space,
At least one of the upper body portion and the lower body portion has a contact portion capable of contacting a wall surface of a building,
A protruding portion is provided that is located on the side of the cutting member where the contact portion is located when viewed along the cutting direction of the sheet material by the cutting member and that protrudes so as to press the sheet material in the vertical direction. sheet cutting device. A holding mechanism for holding the cutting member is provided in the main body,
The holding mechanism is configured to be able to change the position of the cutting member with respect to the main body,
2. The sheet cutting device according to claim 1, wherein the distance between the contact portion and the cutting member in plan view is changed by changing the position of the cutting member. The holding mechanism has a support portion that supports the cutting member and a clamping portion that clamps the support portion,
The support part is rotated around a first rotation axis extending in the vertical direction in a state of being removed from the clamping part, thereby obtaining a first posture and a second posture reversed with respect to the first posture. It is possible to change the posture between the posture and
The holding portion is configured to be able to hold the support portion regardless of whether the support portion is in the first posture or the second posture,
The cutting member is arranged at a position spaced apart by a predetermined distance from the first rotation axis when viewed along the cutting direction,
3. The holding mechanism is configured to change the position of the cutting member with respect to the main body by changing the posture of the support portion between the first posture and the second posture. A sheet cutting device as described. the cutting member is attached to the upper body and has a polygonal shape;
In the cutting member, blade portions capable of cutting the sheet material are provided at portions corresponding to two sides of the polygon that are adjacent to each other,
The sheet cutting apparatus according to any one of claims 1 to 3, wherein the cutting member is provided with a corner portion corresponding to a corner sandwiched between the two sides directed downward. In the cutting member, the blades are provided at sites corresponding to all the sides of the polygon,
5. The sheet cutting device according to claim 4, wherein the cutting member is configured such that the attachment posture to the upper body portion can be changed around a second rotation axis passing through the center of the polygon. The cutting member is supported by the upper body portion and arranged in a state of extending downward from the upper body portion,
The sheet cutting device according to any one of claims 1 to 5, wherein the upper surface of the lower main body portion has a concave portion that is recessed downward in a portion that overlaps with the cutting member in a plan view. A gripping portion that can be gripped by a worker is attached to the upper body portion,
The projecting portion is supported by the upper body portion and is arranged in a state of projecting downward from the upper body portion,
The sheet cutting device according to any one of claims 1 to 6, wherein the gripping portion is arranged on a side of the connecting portion on which the projecting portion is positioned in plan view. 8. The sheet cutting device according to claim 7, wherein the lower main body does not overlap the projecting portion in plan view. 9. The sheet cutting device according to claim 7, wherein the gripping portion is arranged between the cutting member and the connecting portion in plan view. The sheet cutting device according to any one of claims 1 to 9, wherein the protrusion is a roller. The sheet cutting device according to any one of claims 1 to 10, wherein a chamfered portion is formed in at least one lower end portion of both end portions of the lower body portion in the cutting direction.

Images