Box for blast processing

Abstract

To provide a newly-developed box for blast processing that is configured so that blast processing can be performed easily even when an operator cannot satisfactorily face a portion to be processed, because a processing site is narrow.SOLUTION: A box 1 for blast processing according to the present invention comprises an enclosure-like box main body 10 formed in a polygonal shape in a planar view. One surface of side peripheral surfaces of the box main body 10 is set as a contact surface 11 that is fixed to a portion to be processed, and one surface arranged to oppose to the contact surface 11 is set as an operation surface 12. The contact surface 11 comprises a contact frame and a work opening surrounded by the contact frame. On the operation surface 12, An operation panel 12P constituting the operation surface 12 is provided with a protection boot 122. A bottom surface panel 15P arranged obliquely in a planar view with respect to the contact surface 11 to constitute a bottom surface 15 of the box main body 10 is provided with a collection boot 151 in which powder and granular materials are reserved.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a blast processing box suitable for use when engraving letters, patterns, etc. on workpieces such as gravestones, and is particularly concerned with improvements to improve workability at sites where it is difficult to secure sufficient work space. [Background technology]

[0002] Blasting is commonly used to engrave epitaphs and other markings on gravestones and other workpieces. A rubber masking sheet less than 1 mm thick with the desired lettering cut out is attached to the workpiece, and abrasive grains are then sprayed from a blast gun to engrave the surface. Because the abrasive grains and the fine stone chips that are removed fly about violently during this process, the workpiece is often placed in a blast box and the operator's hands are covered with a protective cover.

[0003] Incidentally, for newly erected gravestones, this engraving work can be carried out in a factory or the like, and the appropriate equipment can be used to prepare the working conditions. However, when adding a new epitaph to an existing gravestone in a cemetery, the engraving work must almost always be carried out on-site. In such cases, it is often difficult to secure sufficient working space, and for this reason, various devices have been proposed that are easy to use even in such situations (see, for example, Patent Documents 1 and 2).

[0004] However, in situations where work is even more difficult, such as when the gravestone itself is close to neighboring gravestones, when engraving a new epitaph or other inscription on the side of the gravestone, the worker is unable to fully face the engraving surface. In such cases, most of the sandblasting processing boxes used up until now have been designed to be used while facing the surface to be processed, and no sandblasting processing boxes have been available on the market that take into account such difficult working positions. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-52922 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-240763 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention was made in consideration of this background, and the technical objective was to develop a new blasting box that makes blasting easier even when the worker cannot fully face the area to be processed due to a narrow processing site. [Means for solving the problem]

[0007] That is, the blast processing box according to claim 1 is as follows: A blasting box is installed opposite the workpiece to collect powder and granular material generated during blasting and to protect workers, This device comprises a housing-like box body that is polygonal in plan view, one side of the box body being a contact surface that is brought into contact with the workpiece, and one side of the box body that is arranged opposite to the contact surface being an operation surface, The abutment surface includes an abutment frame and an operation opening surrounded by the abutment frame; On the other hand, the operation surface is provided with a protective boot on the operation surface panel that constitutes the operation surface, Furthermore, a see-through window is provided on either or both of the top panel constituting the top surface of the box body and the operation panel, In addition, a collecting boot for collecting powder and granular material is provided on the bottom panel that constitutes the bottom of the box body, The operating surface is characterized in that it is disposed obliquely relative to the contact surface in a plan view.

[0008] The box for blasting described in claim 2 satisfies the requirements of claim 1, as well as: The box body is configured such that an operation surface panel constituting an operation surface, a top panel constituting a top surface, and a bottom panel constituting a bottom surface are detachably attached to a main body skeleton constituting the box body, With the main body skeleton turned upside down, the top panel and the bottom panel are attached to the main body skeleton in an upside-down state, while the operation panel is attached to the main body skeleton while maintaining the original posture before the main body skeleton is turned upside down, thereby making it possible to freely switch the box main body between left and right directions.

[0009] The box for blasting described in claim 3 has, in addition to the requirements of claim 2, The means for detachably attaching the operation panel, top panel, and bottom panel to the main body frame are characterized by being hook-and-loop fasteners. The above problems are solved by the means described in each claim. [Effects of the Invention]

[0010] First, according to the invention described in claim 1, it is possible to easily engrave new characters or other information into the side of a gravestone, even at a site (cemetery) where gravestones are close to each other. Specifically, when engraving new posthumous Buddhist names, years of death, etc. into the side of a gravestone, there have been cases where, when a conventional rectangular or cubic blasting box is used and the box is set on the gravestone, the engraver cannot reach the body of the engraving worker. However, with the present invention, the operating surface of the blasting box is positioned at an angle from a plan view relative to the contact surface, i.e., the side of the gravestone. This allows the worker to access the box from, for example, diagonally in front of the gravestone, even in such a narrow space, making it relatively easy to engrave new characters or other information into the side of the gravestone.

[0011] According to the invention of claim 2, when engraving on the left and right sides of a gravestone, the left-handedness can be switched simply by attaching and detaching the components of the blasting box or by turning it upside down, so there is no need to prepare a set of right-handed and left-handed blasting boxes, and a single blasting box can be used. Also, because a single blasting box can be used for both left and right handed versions, transportation to the site is easier and the labor of the workers is reduced. Furthermore, since each panel member can be attached and detached freely from the main frame, even if powder and granular material (abrasive grains sprayed to grind the gravestone or tiny stone chips scraped off from the gravestone) remains inside the box body, such powder and granular material can be easily removed and cleaned, and the box body, and ultimately the blasting box, can be kept clean.

[0012] According to the invention of claim 3, the attachment and detachment means of each panel is a hook-and-loop fastener, so that the panels can be easily attached and detached to the main frame without the need for tools. Furthermore, because the attachment and detachment means is a hook-and-loop fastener, the panels can be reused, although they will deteriorate over time. Furthermore, because the hook-and-loop fastener itself is lighter than metal fasteners such as snap fasteners or bolts and nuts, it can contribute to reducing the weight of the entire blast processing box. [Brief explanation of the drawings]

[0013] [Figure 1] This is an oblique view showing the blast processing box of the present invention being set on the side of a workpiece such as a gravestone and an epitaph being engraved. [Figure 2] 1 is a six-view diagram showing a box for blast processing according to the present invention. FIG. [Figure 3] FIG. 10 is a perspective view showing how the components are assembled when switching the blast processing box of the present invention from a right-handed state to a left-handed state. [Figure 4] 10 is an explanatory diagram showing how various panels, including an operation panel, a top panel, and a bottom panel, are detachably attached to a main body frame using hook-and-loop fasteners. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention is as shown in the following examples, but it is possible to make appropriate modifications to these examples within the scope of the technical concept of the present invention. [Example]

[0015] The blasting box 1 of the present invention will be specifically described below. Before describing the blasting box 1 in detail, the working environment and the blasting device 2 used therein will be briefly described with reference to FIG. The blasting process of the present invention is suitable for forming appropriate engravings 31 on the side of a gravestone 3, which is the workpiece on-site.

[0016] The blasting device 2 used for this is a conventional device that utilizes compressed air from a compressor 21 driven by an engine or motor as the processing power. A hose 22 from the compressor 21 is connected to an abrasive grain hopper 24. Abrasive grains 26 and compressed air are mixed in the abrasive grain hopper 24 under pressure, and the air is directed to a blast gun 23 via an abrasive grain pipe 25. Although not shown in detail, when an operator pulls the trigger of the blast gun 23, compressed air mixed with abrasive grains 26 is sprayed. The abrasive grains 26 come into contact with the workpiece, forming an appropriate engraving 31 at the contact point. The shape of the engraving 31 can be obtained by previously hollowing out a masking sheet 27, for example, a rubber sheet with a thickness of 1 mm or less.

[0017] When carrying out this work, the work is carried out inside a blasting box 1 to prevent scattering of the abrasive grains 26 and the powder mixed with stone chips scraped off the surface of the gravestone 3, which is the workpiece, and to protect the workers. Note that if such a blasting box 1 can be used in a state where it is installed at the workpiece position, work is carried out in that state, but if it is to be fixed at a position midway in the height direction of the workpiece, it is preferable to hang it by the mounting bands 4 or tie it to the workpiece by the mounting bands 4.

[0018] Below, we will explain in detail about this blasting box 1. Note that this blasting box 1 can be attached not only to the right side as you face the gravestone 3, but also to the left side (we will assume this is a left-handed installation, and the procedure for switching will be described later), and the following explanation, especially the "up" and "down" directions, will be based on the state in which the blasting box 1 is attached to the right side of the gravestone 3 (as you face it). The blasting box 1 has as its main component a box body 10 that is polygonal in plan view, and its outer shell surface is made up of side peripheral surfaces, a top surface, and a bottom surface. The planar shape of the box body 10 in this embodiment is, strictly speaking, a modified pentagon, or more specifically, a pentagon that is the remaining pentagon after removing a triangle containing one corner of a rectangle. However, in appearance, it is closer to a triangle (right-angled triangle), and is positioned with its sharp point facing the front of the tombstone 3. The side periphery of the box body 10 is made up of a contact surface 11 that is placed against the workpiece (tombstone 3), an operation surface 12 that is arranged opposite to the contact surface 11, and two end surfaces 13 that connect the contact surface 11 and the operation surface 12, namely a large end surface 131 and a small end surface 132, and more strictly speaking, a side frame surface 121 formed at the side end of the operation surface 12. The upper and lower ends of the side periphery are closed by a top surface 14 and a bottom surface 15.

[0019] These surfaces form the outer shell of the box body 10, and its internal space is the processing chamber 100. As is clear from the drawing, one of the structural features is that the operating surface 12 is disposed obliquely in a plan view relative to the contact surface 11. In particular, in this embodiment, the oblique operating surface 12 is disposed so as to face the front side of the tombstone 3. The configuration of each surface will be explained below.

[0020] First, as shown in Figure 2, the contact surface 11 is formed in a rectangular shape that is somewhat long in the vertical direction when facing this surface, and a contact frame 110 is provided around it, and the large opening surrounded by this contact frame 110 becomes the work opening 111. As mentioned above, the contact surface 11 is applied to the tombstone 3, which is the workpiece, and therefore the contact frame 110 is provided with a pad 112 to enhance the adhesion to the tombstone 3.

[0021] On the other hand, the operation surface 12 obliquely disposed opposite such abutment surface 11 is composed of a detachable operation surface panel 12P. Incidentally, as will be described later, in addition to the operation surface panel 12P, a top panel 14P constituting the top surface 14 and a bottom panel 15P constituting the bottom surface 15 are also detachable. Note that the portions of the box body 10 excluding these detachable panel members are referred to as the main body skeleton 101. In other words, the panels are detachable from the main body skeleton 101.

[0022] Furthermore, the removable operation surface panel 12P is equipped with protective boots 122 that protect the hands and arms of the operator during blast processing, and also has a see-through window 123 that allows visual observation of the working status inside the processing chamber 100. As the visibility of the see-through window 123 becomes poor due to the influence of powder and granular materials as the device is used for a long time, the transparent plate 123P is held in place by a spring-like holder 124 so that it can be replaced freely.

[0023] The operation panel 12P has operation section hook and loop fasteners 12F stretched along the periphery of its rear surface facing the processing chamber 100, with loop elements of the hook and loop fastener elements stretched as shown in FIG. 4 as an example. Correspondingly, the main body skeleton 101 is also provided with operation section hook and loop fasteners 12F (shown with the same reference symbol 12F), with hook elements of the hook and loop fastener elements stretched along the operation section. These operation section hook and loop fasteners 12F allow the operation panel 12P to be detachable from the main body skeleton 101. Of course, the detachable structure is not necessarily limited to hook and loop fasteners, and other suitable means can be selected, such as a toggle buckle structure or screws such as thumbscrews.

[0024] Next, we will explain the end surface 13, which is part of the side periphery and is connected to the contact surface 11 and the operating surface 12. This end surface is arranged so that a large end surface 131 and a small end surface 132 face each other. In this embodiment, the small end surface 132 is arranged on the front side of the tombstone 3, and the large end surface 131 is arranged on the rear side of the tombstone 3. The large end surface 131 is provided with a blower fan 131B and a ventilation mesh 131M on the top and bottom, as well as a handle 135 that extends vertically. The small end surface 132 does not have any special functional components, but is provided with a handle 135 that is used together with the large end surface 131 for ease of carrying the tombstone or for attaching it to the tombstone 3. The large end surface 131 and the small end surface 132 are fixedly attached to the main body frame 101 and constitute part of the main body frame 101.

[0025] Next, the top surface 14 will be described. As described above, the top surface 14 is essentially composed of a top panel 14P that is detachable from the main body frame 101. As shown in FIG. 4 as an example, the top panel 14P has a see-through window 141, and top hook-and-loop fasteners 14F are provided on both the top and bottom of the peripheral frame portion to achieve the detachable configuration. The hook-and-loop fastener elements on both the top and bottom are loop elements, and correspondingly, a top hook-and-loop fastener 14F (shown with the same reference symbol 14F) that is a hook element is provided on the main body frame 101 side. As with the operation panel 12P, the detachable configuration of the top panel 14P is not limited to hook-and-loop fasteners.

[0026] Next, the bottom surface 15 will be described. Like the top surface 14, the bottom surface 15 is essentially composed of a bottom panel 15P that is detachably attached to the main body skeleton 101. As shown in Figures 1 and 2 above, the bottom panel 15P includes a collecting boot 151, and a closing string 151S for closing the opening is attached to the free end (lower end) of the collecting boot 151, for example. The peripheral frame portion that holds the collection boot 151 is provided with bottom hook-and-loop fasteners 15F on both the top and bottom sides for detachably attaching the bottom panel 15P (see FIG. 4). The bottom hook-and-loop fasteners 15F are loop elements on both the top and bottom sides, and corresponding bottom hook-and-loop fasteners 15F (shown with the same reference symbol 15F) of hook elements are provided on the main body skeleton 101 side. Note that, like the operation panel 12P, the detachable configuration for the bottom panel 15P is not limited to hook-and-loop fasteners.

[0027] The blast processing box 1 of the present invention has the configuration described above, but as mentioned above, the purpose of making the operation panel 12P, top panel 14P, and bottom panel 15P detachable from the main body frame 101 is to make the device compatible with both right-handed and left-handed operation, and the method of use and the procedure for switching between left-handed and right-handed operation will be explained below.

[0028] (1) Standard state (right-hand state) First, we will explain the starting state as the standard state, which is the right-handed state (see the solid line in Figure 1). To use it in this state, for example, the work to be done is not on the front of the tombstone 3, but on the right side as you face it, and this usage mode is intended for a right-handed worker. As described above, this configuration is attached to a tombstone 3 or the like by placing the contact surface 11 of the box body 10 against the right side of the tombstone. As previously mentioned, this attachment can also be firmly secured to the tombstone 3, which is the workpiece, using the attachment band 4 or the like. In this fixed state, the operation surface 12 is not directly facing the side of the tombstone 3, but is somewhat obliquely oriented relative to the front of the tombstone (a so-called oblique installation). Therefore, the worker can access the operation surface 12 from the diagonally forward right side of the tombstone 3, rather than from the side of the tombstone 3. In this state, the worker inserts the blast gun 23 together with his or her hand through the protective boot 122 and operates the blasting device 2 in the usual manner to engrave the desired characters or the like on the tombstone 3. Furthermore, if work is carried out in this state, abrasive grains 26 or powder from cuttings of gravestones and the like will be generated, but these will fall into the collection boot 151 provided on the bottom panel 15P and be collected. At this time, the open surface of the free end side (lower side) of the collection boot 151 is of course closed in a purse-like manner by a closing string 151S, and the collected powder can be stored inside the collection boot 151.

[0029] (2) Switching to left-hand mode In this embodiment, the blasting box 1 can be used in either a right-handed state or a left-handed state, and the procedure for switching between these states will be described below. To switch a blast processing box 1 that has been used in a right-handed state to a left-handed state, as shown in Figure 3 as an example, the operation panel 12P, top panel 14P, and bottom panel 15P are removed from the main body skeleton 101 of the box body 10. In this state, the remaining main body skeleton 101 is turned upside down and attached so that the contact surface 11 is in contact with the left side of the tombstone 3. In this state, as shown in Figure 3 above, the main body skeleton 101 is line-symmetrical to the original position (right-handed position) in a plan view. The operation panel 12P is attached to the main body skeleton 101 (the main body skeleton 101 turned upside down) in the original position (right-handed position). In this state, top panel 14P (top panel 14P removed from its original position) is attached to top surface 14 of main body skeleton 101, which faces upward, but in the original position (right-handed position), top panel 14P does not match the shape of top surface 14. For this reason, top panel 14P, which is approximately triangular, is turned upside down so that top panel 14P matches the frame shape of top surface 14, and then attached with top surface fasteners 14F. Similarly, bottom panel 15P is also turned upside down and fixed to bottom surface 15. Prior to this work, collection boot 151 itself is also turned inside out, so to speak, and pulled out from its original right-handed position to the opposite side. In this state, bottom panel 15P is attached to bottom surface 15 with bottom hook-and-loop fastener 15F, turned upside down from its original position. In this way, if blasting box 1 is installed on the left side of tombstone 3, for example, operation surface 12 is tilted slightly toward the front relative to contact surface 11, allowing left-handed workers to easily access the processing area with their left hand.

[0030] (3) Left and right hand drive dedicated device One feature of this embodiment is that it can be used in both right- and left-hand modes, as described above. However, the most fundamental feature of this invention is that the operation surface 12 is positioned at an angle in plan view relative to the contact surface 11 (particularly in this embodiment, it is positioned at an angle facing the front of the tombstone 3), thereby facilitating work in narrow spaces. Therefore, the blasting box 1 can be configured as a right- or left-hand only device. In this case, the operation panel 12P, top panel 14P, and bottom panel 15P do not need to be detachable from the main body frame 101 as described above; they can be fixed in a non-detachable state. [Explanation of symbols]

[0031] 1 Blasting Box 2 Blasting equipment 3 Tombstone (workpiece) 4 Mounting band 10 Box body 11 Contact surface 12 Operation surface 12F Operation hook and loop fastener 12P operation panel 13 End face 14 Top 14F Top surface fastener 14P top panel 15 bottom 15F Bottom hook and loop fastener 15P bottom panel 21 Compressor 22 Hose 23 Blast Gun 24 Abrasive grain hopper 25 Abrasive Pipe 26 abrasive grains 27 Masking sheet 31 Engraving 100 processing room 101 Main body skeleton 102 hook and loop fastener 110 Abutment frame 111 Working opening 112 Pad 121 Side frame surface 122 Protective Boots 123 Viewing window 123P Transparent Plate 124 Holder 131 Big end face 131B Blower Fan 131M Breathable Mesh 132 Small end face 135 Handle 141 Viewing window 151 Collection Boots 151S Closure string

Claims

1. A blasting box is installed opposite the workpiece to collect powder and granular material generated during blasting and to protect workers, This device comprises a housing-like box body that is polygonal in plan view, one side of the box body being a contact surface that is brought into contact with the workpiece, and one side of the box body that is arranged opposite to the contact surface being an operation surface, The abutment surface includes an abutment frame and an operation opening surrounded by the abutment frame; On the other hand, the operation surface is provided with a protective boot on the operation surface panel that constitutes the operation surface, Furthermore, a see-through window is provided on either or both of the top panel constituting the top surface of the box body and the operation panel, In addition, a collecting boot for collecting powder and granular material is provided on the bottom panel that constitutes the bottom of the box body, A box for blast processing, characterized in that the operating surface is disposed obliquely relative to the contact surface in a plan view.

2. The box body is configured such that an operation surface panel constituting an operation surface, a top panel constituting a top surface, and a bottom panel constituting a bottom surface are detachably attached to a main body skeleton constituting the box body, 2. The blast processing box according to claim 1, wherein the top panel and the bottom panel are attached to the main body skeleton in an upside-down state when the main body skeleton is turned upside down, while the operation panel is attached to the main body skeleton while maintaining its original position before the main body skeleton is turned upside down, thereby allowing the box body to be freely switched between left and right directions.

3. 3. The box for blast processing according to claim 2, wherein the means for detachably attaching the operation panel, top panel, and bottom panel to the main body frame are hook-and-loop fasteners.

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