Putty spatula

Abstract

To provide a putty spatula used for adjusting the joints and surfaces of building materials such as gypsum boards, which are base treatments for wallpapering and painting, which greatly affect the finish, and for adjusting unevenness (a state where the joint surfaces of building materials are uneven). [Solution] The support base 1a, which clamps and fixes the blade, has a longitudinal axis (narrow bottom) 1b extending upward. The spatula 2 is a blade of a specified width, to which putty is applied on one side. It is machined from a thin, resilient metal plate such as stainless steel and fixed to the lower part of the support base 1a with a rivet 3. The longitudinal axis (wide top) 4 has a narrow portion toward the tip of the blade and is wider than the longitudinal axis (narrow bottom) 1b. The cross section of the grip is formed by the longitudinal axis (wide top) 4 and the longitudinal axis (narrow bottom) 1b in a wide top and narrow bottom shape, making it easier for all fingers to apply force to the grip. Furthermore, the longitudinal axis (wide top) 4 reduces the burden on users with small fingers and facilitates stable work. The position of the distance to the blade can be freely adjusted and fixed forward and backward on the longitudinal axis (narrow bottom) 1b using a position adjustment mechanism 5 such as a screw.

Description

[Technical Field]

[0001] This invention relates to a putty spatula, a tool for adjusting unevenness (a condition in which the joint surfaces of building materials are uneven), used to fill in joints and gaps in building materials such as gypsum board with putty.In order to increase and improve the effective contact angle between the blade and the building material, the thickness and width of the gripping part have been made three-dimensional, meaning that the cross-sectional shape of the gripping part is wide at the top and narrow at the bottom, thereby bringing the center of gravity closer to the palm and allowing the position of the constriction formed near the clamping part to be adjusted relative to the blade. [Background technology]

[0002] When smoothing the joints and surfaces of building materials such as plasterboard, which is the base for wallpapering and painting, which have a significant impact on the finished product, or when applying putty to adjust unevenness (uneven joints between building materials), or scraping it off, the work is done with delicate force that is balanced by changing the contact angle between the building material and the blade and the gripping force of the putty spatula. [Prior art documents]

[0003] [Patent documents] [Patent documents] Japanese Patent Application Publication No. 06-064775 Summary of the Invention The problem the invention is trying to solve

[0004] The typical surface preparation for wallpapering, which significantly affects the finished product, involves two applications of base putty and top putty, and a third application for paint base preparation. However, the time constraints of completing the work before the putty hardens due to chemical reactions or drying make it a crucial, time-consuming and labor-intensive task that requires filling holes and smoothing uneven surfaces while completing the work within the allotted time frame. The clamping and gripping parts of a typical putty spatula blade are aligned on the same line across its cross section, which causes the handle to interfere with the material, narrows the effective contact angle between the material and the blade, and limits the gripping force of the putty spatula. This makes it difficult to apply the necessary force to apply or remove the material, reducing work efficiency. Furthermore, even with different types of putty spatula blades, the shape and size of the grip are generally the same, placing a greater physical burden on users with smaller fingers and a weaker grip on the spatula, such as women. In addition, there are various ways of holding a putty spatula that users are accustomed to, such as a shallow grip where the index finger holds the blade and the other fingers grip the narrow part, or a deeper grip where the index finger and middle finger are added together to hold the blade. However, since the distance between the narrow part where the gripping force is applied and the blade cannot be changed, users have to change the way they hold the spatula depending on the type of putty spatula, which reduces work efficiency. Therefore, in order to solve the above problems, it is an object of the present invention to provide a putty spatula that allows for efficient, quick and accurate application. Means for solving the problem

[0005] This device is a three-dimensional device with varying thickness and width of the grip, i.e., the cross-sectional shape of the grip is wide at the top and narrow at the bottom, with a constriction formed near the clamping and fixing part. This moves the center of gravity closer to the palm, preventing the handle from interfering with the building material, increasing the effective contact angle between the building material and the blade, making it easier to apply gripping force and increasing the flexibility of use of the putty spatula. Also, by providing a putty spatula with a variable width of the constriction, the necessary gripping force can be obtained regardless of the size of the user's fingers, and the three-dimensional part including the constriction can be adjusted in position relative to the blade, allowing work to be done in a familiar grip, solving the problem. Effects of the device

[0006] As mentioned above, by making the grip three-dimensional with varying thickness and width, in other words by making the cross-sectional shape of the grip wide at the top and narrow at the bottom with a constriction formed near the clamping and fixing part, the center of gravity is brought closer to the palm of the hand, the handle does not interfere with the building material, the effective contact angle between the building material and the blade is expanded, increasing the freedom of use of the putty spatula, making it easier to transmit delicate force to the building material without any fluctuation, reducing the strain on the fingers and arms and greatly improving workability and stability.

[0007] Furthermore, by providing a putty spatula with an adjustable width at the constriction, it is possible to apply force easily and obtain the necessary gripping force regardless of the size of the user's fingers, thereby contributing to reducing the physical burden.

[0008] In addition, the three-dimensional part including the narrowed part can be adjusted in position relative to the blade, helping the user to work efficiently with a familiar grip that fits naturally and without stress. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. [Figure 2] FIG. 2 is a cross-sectional view taken along the line AA of the present invention. [Figure 3] FIG. BB cross-sectional view of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] This putty spatula is composed of a blade of a specified width for applying putty on one side, and a grip consisting of a clamping portion for holding the blade and a handle. The angle between the tip of the blade and the grip is 90 degrees, forming a T-shape. The grip is three-dimensional, with varying thickness and width; that is, the cross-section of the grip is wide-topped and narrow-bottomed, with a constriction formed near the clamping portion. The narrow-bottom cross-section of the grip is a longitudinal axis (narrow-bottom) that extends upward from the upper portion of the clamping plate of the blade, while the wide-top cross-section is a longitudinal axis (wide-top) that is wider than the longitudinal axis and forms a constriction near the clamping portion. The narrow-bottom and wide-top longitudinal axes form the grip, and the width of the constriction is prepared in dimensions intended for men and women, and the position of the wide-top longitudinal axis can be freely adjusted forward and backward along the longitudinal axis and fixed using a position adjustment mechanism such as a screw. [Example]

[0011] An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1a denotes a support base that clamps and fixes the blade, with a longitudinal axis (narrow at the bottom) 1b extending upward. Spatula 2 is a blade of a specified width that is used to apply putty on one side. It is machined from a thin, flexible metal plate such as stainless steel and is fixed to the lower part of support base 1a with rivets 3.

[0012] The longitudinal shaft (wide at the top) 4 has a narrowed portion toward the tip of the blade and is wider than the longitudinal shaft (narrow at the bottom) 1b. The cross section of the grip is wide at the top and narrow at the bottom, formed by the longitudinal shaft (wide at the top) 4 and the longitudinal shaft (narrow at the bottom) 1b, making it easier for all fingers to apply force when gripping the grip, and increasing the effective contact angle between the building material and the blade. In addition, while the wide at the top and narrow at the bottom and the narrowed portion improve gripping strength, we have prepared a longitudinal shaft (wide at the top) 4 with an adjusted narrowed portion width, which reduces the burden on users with small fingers, such as women, and makes it easier to work steadily.

[0013] Furthermore, the longitudinal axis (upper wide type) 4 can be freely adjusted and fixed in position in terms of the distance to the blade back and forth on the longitudinal axis (lower narrow type) 1b using a position adjustment mechanism 5 such as a screw.

[0014] Because of the above configuration, the present invention is basically used in the same way as a regular putty spatula, but in contrast to conventional structures where the handle interferes with the building material and the effective contact angle between the building material and the blade is limited in its range of movement, the putty spatula of the present invention has a three-dimensional grip with varying thickness and width, i.e., the cross-sectional shape of the grip is wide at the top and narrow at the bottom, with a constriction formed near the clamping fixing part. This makes it easier for all fingers to apply force to the grip, increasing the range of movement of the contact angle between the building material and the blade and increasing flexibility, resulting in increased gripping force and making it easier to transmit delicate force without any fluctuation, reducing strain on the fingers and arms and greatly improving workability and stability. Furthermore, by providing a putty spatula with a variable width constriction, the necessary gripping force can be obtained regardless of the size of the user's fingers, and the position of the longitudinal axis (wide at the top) with the constriction can be freely adjusted and fixed relative to the blade, allowing the user to work more freely using a familiar grip, reducing labor burden and improving work efficiency. [Industrial Applicability]

[0015] The present invention is used in the putty spatula manufacturing industry. [Explanation of symbols]

[0016] 1a Support Base 1b Longitudinal shaft (lower narrow type) 2 spatulas 3 Rivets 4 Longitudinal axis (upper wide type) 5 Position adjustment mechanism

Claims

[Claim 1] This putty spatula is composed of a blade of a specified width for applying putty to one side, and a gripping part that clamps and fixes the blade and serves as a handle, and is characterized in that the gripping part is three-dimensional with varying thickness and width, that is, the cross-sectional shape of the gripping part is wide at the top and narrow at the bottom, with a constriction formed near the clamping and fixing part.

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