Adjustable thread rolling machine for manufacturing bolts

Abstract

The utility model relates to the technical field of thread rolling machines, and provides an adjustable thread rolling machine for preparing bolts, which comprises a case, the left side and the right side of the top of the case are respectively provided with a sliding chute I, the inner sides of the sliding chutes I are respectively provided with a sliding block in a sliding manner, and the tops of the sliding blocks are respectively and fixedly provided with a mechanical block; and fixed blocks are fixedly mounted at the tops of the mechanical blocks. When the first rotating block is rotated, the first forward and reverse screw rod, the transmission belt and the second forward and reverse screw rod are driven to rotate together, when the first forward and reverse screw rod and the second forward and reverse screw rod rotate together, the fixing block is driven to be slowly adjusted inwards, and at the moment, the mechanical block drives the thread rolling mechanism to be adjusted inwards; compared with a traditional device, perfect matching of the bolt and the nut can be guaranteed through the accurate screw pitch of the device, errors are small, and the problem that fine adjustment cannot be achieved in the prior art is solved through the technical scheme.

Description

TECHNICAL FIELD

[0001] The utility model relates to a thread rolling machine technical field, specifically, relates to an adjustable thread rolling machine for preparing bolt. BACKGROUND

[0002] The thread rolling machine is a multifunctional cold extrusion forming machine tool, and the thread rolling machine can perform thread rolling, straight thread rolling, inclined thread rolling and other treatments on workpieces in a cold state within the rolling pressure range, straight tooth rolling, inclined tooth rolling and inclined spline gear rolling, straightening, reducing, rolling light and various forming rolling, and the thread rolling machine with adjustable roll gap is used for thread rolling according to different steel bar diameters. The existing adjustable thread rolling machine has a relatively large error in precise adjustment, thereby affecting the performance and safety of the whole equipment, and may cause excessive deformation or cracks of materials, reduce production efficiency, and cannot undertake some special and high-value orders, so it is necessary to improve and optimize. SUMMARY

[0003] The utility model provides an adjustable thread rolling machine for preparing bolt, solves the problem of being unable to fine adjustment in the related art.

[0004] The technical scheme of the utility model is as follows: an adjustable thread rolling machine for preparing bolt, including the machine case, the top of the machine case is provided with the sliding slot one on both sides, the sliding block is slidably installed in the sliding slot one, the top of the sliding block is fixedly installed with the mechanical block, the top of the mechanical block is fixedly installed with the fixed block, the inside of the fixed block is screwed with the positive and negative screw rod one, and the both ends of the positive and negative screw rod one are penetrated into the inside of the fixed block, the inside of the fixed block is screwed with the positive and negative screw rod two at the far end of the positive and negative screw rod one, and the both ends of the positive and negative screw rod two are penetrated into the inside of the fixed block, the positive and negative screw rod one and the positive and negative screw rod two are drivenly connected through the transmission belt, the top end of the outside of the positive and negative screw rod one is fixedly installed with the rotating block one outside the transmission belt, and the inside of the mechanical block is fixedly installed with the thread rolling mechanism.

[0005] As a preferred technical scheme of the utility model, the top of the machine case is fixedly installed with the support two, the outer surface of the support two is rotatably installed with the annular protruding block one, the annular protruding block one is penetrated into the support two, the outer surface of the annular protruding block one is fixedly installed with the adjusting mechanism, the top of the annular protruding block one is fixedly installed with the supporting block, the top of the supporting block is fixedly installed with the annular protruding block two, the annular protruding block two and the annular protruding block one are movably installed with the sleeve block, the outer surface of the support two is rotatably installed with the connecting rod above, the top of the connecting rod is fixedly installed with the telescopic rod, the telescopic rod is penetrated into the inside of the annular protruding block one and extends to the inside of the annular protruding block one, and the inside of the annular protruding block one is rotatably installed with the roller.

[0006] As an optimal technical scheme of the utility model, the adjusting mechanism contains that the outer surface of annular protruding block one is fixedly installed above support two, the ear block is fixedly installed above support two, the outer surface of support two is fixedly installed with protruding block two right side of protruding block one, the inside of protruding block one is screwed with screw rod and the both ends of screw rod are through protruding block one and protruding block two, and the outside top of protruding block two is rotatably installed with rotating block two.

[0007] As an optimal technical scheme of the utility model, the adjusting mechanism contains that the outer surface of annular protruding block one is fixedly installed above support two, the ear block is fixedly installed above support two, the outer surface of support two is fixedly installed with protruding block two right side of protruding block one, the inside of protruding block one is screwed with screw rod and the both ends of screw rod are through protruding block one and protruding block two, and the outside top of protruding block two is rotatably installed with rotating block two.

[0008] As an optimal technical scheme of the utility model, the adjusting mechanism contains that the outer surface of annular protruding block one is fixedly installed above support two, the ear block is fixedly installed above support two, the outer surface of support two is fixedly installed with protruding block two right side of protruding block one, the inside of protruding block one is screwed with screw rod and the both ends of screw rod are through protruding block one and protruding block two, and the outside top of protruding block two is rotatably installed with rotating block two.

[0009] As an optimal technical scheme of the utility model, the adjusting mechanism contains that the outer surface of annular protruding block one is fixedly installed above support two, the ear block is fixedly installed above support two, the outer surface of support two is fixedly installed with protruding block two right side of protruding block one, the inside of protruding block one is screwed with screw rod and the both ends of screw rod are through protruding block one and protruding block two, and the outside top of protruding block two is rotatably installed with rotating block two.

[0010] As an optimal technical scheme of the utility model, the adjusting mechanism contains that the outer surface of annular protruding block one is fixedly installed above support two, the ear block is fixedly installed above support two, the outer surface of support two is fixedly installed with protruding block two right side of protruding block one, the inside of protruding block one is screwed with screw rod and the both ends of screw rod are through protruding block one and protruding block two, and the outside top of protruding block two is rotatably installed with rotating block two.

[0011] As an optimal technical scheme of the utility model, the adjusting mechanism contains that the outer surface of annular protruding block one is fixedly installed above support two, the ear block is fixedly installed above support two, the outer surface of support two is fixedly installed with protruding block two right side of protruding block one, the inside of protruding block one is screwed with screw rod and the both ends of screw rod are through protruding block one and protruding block two, and the outside top of protruding block two is rotatably installed with rotating block two.

[0012] As an optimal technical scheme of the utility model, the adjusting mechanism contains that the outer surface of annular protruding block one is fixedly installed above support two, the ear block is fixedly installed above support two, the outer surface of support two is fixedly installed with protruding block two right side of protruding block one, the inside of protruding block one is screwed with screw rod and the both ends of screw rod are through protruding block one and protruding block two, and the outside top of protruding block two is rotatably installed with rotating block two.

[0013] As an optimal technical scheme of the utility model, the adjusting mechanism contains that the outer surface of annular protruding block one is fixedly installed above support two, the ear block is fixedly installed above support two, the outer surface of support two is fixedly installed with protruding block two right side of protruding block one, the inside of protruding block one is screwed with screw rod and the both ends of screw rod are through protruding block one and protruding block two, and the outside top of protruding block two is rotatably installed with rotating block two.

[0014] The working principle and beneficial effects of the utility model are as follows:

[0015] 1. The utility model discloses a rotation rotating block one will drive positive and negative screw rod one, transmission belt, positive and negative screw rod two rotate together, when positive and negative screw rod one and positive and negative screw rod two rotate together will drive fixed block slowly adjust to the inside, mechanical block can drive the rolling screw mechanism to adjust inward at this moment, and the perfect cooperation of screw bolt and nut can be ensured by the accurate pitch of the device compared with traditional device, and the error is smaller, avoids the problem such as connection slack or unable to assemble caused by pitch error, helps to improve the corrosion resistance of screw bolt, because the rough surface is more prone to accumulate corrosive substances, and also can reduce friction in the assembly process, prevent thread wear.

[0016] 2. The utility model discloses a rotation adjusting mechanism will make annular boss one begin to rotate, when annular boss one begins to rotate will drive support block, annular boss two rotate together, when annular boss one and annular boss two rotate will drive the rotation of the rotating shaft of sleeve block top, to make sleeve block produce displacement, when sleeve block produces displacement will be against telescopic rod and contract to the inside, when telescopic rod contracts to the inside will drive connecting rod rotation, then telescopic rod is contacted to the screw bolt of gyro wheel and fixes it, compared with traditional device, this device greatly reduces the equipment adjustment time when converting from one screw bolt specification to another specification production, improves the conversion efficiency of production, and the service life can be longer, further save the cost of equipment renewal. DRAWINGS

[0017] The utility model will be further explained in detail in combination with the drawings and specific embodiment.

[0018] Figure 1 It is the front three-dimensional appearance structure schematic diagram of the utility model;

[0019] Figure 2 It is the structure schematic diagram of positive and negative screw rod two of the utility model;

[0020] Figure 3 It is the structure schematic diagram of fixed block of the utility model;

[0021] Figure 4 It is the structure schematic diagram of gyro wheel of the utility model;

[0022] Figure 5 It is the structure schematic diagram of scraper of the utility model.

[0023] In the figure: 1, case; 2, sliding groove one; 3, sliding block; 4, mechanical block; 5, fixed block; 6, ear block; 7, limiting block; 8, positive and negative screw rod one; 9, positive and negative screw rod two; 10, rotating block one; 11, transmission belt; 12, C-shaped support; 13, thread rolling wheel; 14, support one; 15, motor; 16, support two; 17, annular protrusion one; 18, protrusion one; 19, protrusion two; 20, screw rod; 21, rotating block two; 22, supporting block; 23, connecting rod; 24, telescopic rod; 25, sleeve block; 26, annular protrusion two; 27, roller; 28, waste groove; 29, sliding groove two; 30, sliding rod; 31, arc-shaped sliding block; 32, scraper; 33, connecting plate; 34, base. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are involved in the protection scope of the utility model.

[0025] Embodiment 1 includes the case 1, it is characterized by: the top left and right sides of case 1 are provided with sliding groove one 2, the inner side of sliding groove one 2 is slidably provided with sliding block 3, the top of sliding block 3 is fixedly provided with mechanical block 4, the top of mechanical block 4 is fixedly provided with fixed block 5, the inside of fixed block 5 is threadedly provided with positive and negative screw rod one 8, and the two ends of positive and negative screw rod one 8 are penetrated through the inside of fixed block 5, the inside of fixed block 5 is threadedly provided with positive and negative screw rod two 9 at the distal end of positive and negative screw rod one 8, and the two ends of positive and negative screw rod two 9 are penetrated through the inside of fixed block 5, positive and negative screw rod one 8 and positive and negative screw rod two 9 are drivingly connected by transmission belt 11, the outer top end of positive and negative screw rod one 8 is fixedly provided with rotating block one 10 at the outer side of transmission belt 11, and the inner side of mechanical block 4 is fixedly provided with thread rolling mechanism.

[0026] When the staff rotates rotating block one 10, positive and negative screw rod one 8 will start to rotate, which will drive positive and negative screw rod two 9 to rotate through transmission belt 11, when positive and negative screw rod one 8 and positive and negative screw rod two 9 rotate together, fixed block 5 will be slowly adjusted to the inside, when fixed block 5 is adjusted to the inside, mechanical block 4 will also be adjusted to the inside, when mechanical block 4 is adjusted to the inside, bottom sliding block 3 will slide in sliding groove one 2, when mechanical block 4 is adjusted to the inside, thread rolling mechanism will also be adjusted to the inside.

[0027] When the rotating block one 10 is rotated, the positive and negative screw rod one 8, the transmission belt 11 and the positive and negative screw rod two 9 are rotated together. When the positive and negative screw rod one 8 and the positive and negative screw rod two 9 rotate together, the fixed block 5 is slowly adjusted inward. At this time, the mechanical block 4 drives the thread rolling mechanism to adjust inward. Compared with the traditional device, the accurate pitch of the device can ensure the perfect cooperation of the bolt and the nut, the error is small, and the problems such as loose connection or unable to assemble caused by pitch error are avoided, which helps to improve the corrosion resistance of the bolt. Because the rough surface is more prone to accumulate corrosive substances, and the friction force can also be reduced during the assembly process, preventing thread wear.

[0028] The top of the case 1 is fixedly provided with a support two 16. An annular protrusion one 17 is rotatably arranged on the outer surface of the support two 16 and penetrates the support two 16. An adjusting mechanism is fixedly arranged on the outer surface of the annular protrusion one 17. A supporting block 22 is fixedly arranged on the top of the annular protrusion one 17. An annular protrusion two 26 is fixedly arranged on the top of the supporting block 22. A sleeve block 25 is movably arranged between the annular protrusion two 26 and the annular protrusion one 17. A connecting rod 23 is rotatably arranged on the outer surface of the support two 16. A telescopic rod 24 is fixedly arranged on the top of the connecting rod 23 and extends into the inside of the annular protrusion one 17 through the sleeve block 25. A roller 27 is rotatably arranged on the inside of the annular protrusion one 17 where the telescopic rod 24 extends.

[0029] When the adjusting mechanism is rotated by the staff, the annular protrusion one 17 starts to rotate. When the annular protrusion one 17 starts to rotate, the supporting block 22 and the annular protrusion two 26 rotate together. When the annular protrusion one 17 and the annular protrusion two 26 rotate, the rotating shaft on the top of the sleeve block 25 rotates, so that the sleeve block 25 is displaced. When the sleeve block 25 is displaced, the telescopic rod 24 is contracted inward. When the telescopic rod 24 is contracted inward, the connecting rod 23 is rotated. At this time, the telescopic rod 24 gradually contracts inward, and the roller 27 contacts and fixes the bolt when it contacts the bolt.

[0030] When the adjusting mechanism is rotated by the staff, the annular protrusion one 17 starts to rotate. When the annular protrusion one 17 starts to rotate, the supporting block 22 and the annular protrusion two 26 rotate together. When the annular protrusion one 17 and the annular protrusion two 26 rotate, the rotating shaft on the top of the sleeve block 25 rotates, so that the sleeve block 25 is displaced. When the sleeve block 25 is displaced, the telescopic rod 24 is contracted inward. When the telescopic rod 24 is contracted inward, the connecting rod 23 is rotated. Then, the telescopic rod 24 drives the roller 27 to contact and fix the bolt when it contacts the bolt. Compared with the traditional device, this device greatly reduces the equipment adjustment time when switching from one bolt specification to another specification, improves the conversion efficiency of production, and may have a longer service life, further saving the cost of equipment update.

[0031] The adjusting mechanism of the embodiment 3 comprises that the outer surface of the annular protrusion 17 is fixedly installed above the bracket 2 16, the lug 6 is fixedly installed above the annular protrusion 17, the protrusion 2 19 is fixedly installed above the outer surface of the bracket 2 16 and right to the protrusion 1 18, the screw rod 20 is threadedly sleeved in the protrusion 1 18, and the both ends of the screw rod 20 penetrate through the protrusion 1 18 and the protrusion 2 19, and the rotating block 2 21 is rotatably installed at the outer top of the protrusion 2 19.

[0032] The rotating block 2 21 drives the screw rod 20 to rotate, the protrusion 1 18 is displaced when the screw rod 20 rotates, the lug 6 is displaced when the protrusion 1 18 is displaced, and the annular protrusion 1 7 is rotated when the lug 6 is displaced, so as to reduce the workload of the staff and avoid accidents.

[0033] The embodiment 4 comprises that the waste groove 28 is formed in the middle of the top of the case 1, and the guide grooves are formed on both sides of the waste groove 28.

[0034] The waste groove 28 can help collect the waste produced by the thread rolling machine.

[0035] The embodiment 5 comprises that the sliding grooves 2 29 are formed on both sides of the waste groove 28, the sliding rods 30 are slidingly installed in the sliding grooves 2 29, the arc-shaped sliding blocks 31 are fixedly installed on the outer surfaces of the sliding rods 30, the scraper 32 is fixedly installed between the arc-shaped sliding blocks 31, and the connecting plate 33 is fixedly installed on the top of the sliding rod 30.

[0036] The connecting plate 33 is pulled by external force, the sliding rod 30 is pulled outwards when the connecting plate 33 is pulled, the arc-shaped sliding blocks 31 and the scraper 32 are pulled outwards together when the sliding rod 30 is pulled outwards, and the scraper 32 helps push the waste outwards.

[0037] The embodiment 6 comprises that the arc-shaped sliding blocks 31 are fixedly installed on the outer surfaces of the sliding rods 30 and in the guide grooves formed on both sides of the waste groove 28.

[0038] The arc-shaped sliding blocks 31 can effectively prevent falling off when pulled outwards and add workload to the staff.

[0039] The thread rolling mechanism comprises that the C-shaped brackets 12 are fixedly installed on the inner sides of the mechanical blocks 4, the thread rolling wheels 13 are rotatably installed in the C-shaped brackets 12, the brackets 1 14 are fixedly installed on the inner sides of the mechanical blocks 4, the motors 15 are fixedly installed on the inner sides of the brackets 1 14, and the output shafts of the motors 15 extend into the C-shaped brackets 12 and are fixedly connected with the thread rolling wheels 13.

[0040] When the support 14 is started, the motor 15 output shaft starts to rotate, and the rolling screw 13 starts to rotate, avoiding the cumbersome steps during rolling, and improving the work efficiency.

[0041] The outer side of the fixed block 5 is fixedly provided with a limiting block 7, and the limiting block 7 is penetrated by a forward and reverse screw rod 8 and a forward and reverse screw rod 9.

[0042] The limiting block 7 can limit the rotation of the rotating block 10 and avoid the risk of the fixed block 5 falling off during movement, thereby avoiding the risk of the whole device malfunctioning.

[0043] The bottom of the case 1 is fixedly provided with a base 34, and the base 34 is provided with four same shapes around the bottom of the case 1.

[0044] The base 34 is designed to have the benefit of stable operation of the whole device.

[0045] The top and left and right sides of the case 1 are provided with a sliding groove 2, and the inner side of the sliding groove 2 is slidably provided with a sliding block 3.

[0046] A group of sliding grooves 2 are formed on the outer surface of the mechanical block 4, so that the sliding block 3 can slide more smoothly and reduce the occurrence of jamming.

[0047] The working principle and use process of the utility model are as follows:

[0048] When the rotating block 10 is rotated, the forward and reverse screw rod 8 starts to rotate, and the forward and reverse screw rod 9 also rotates through the transmission belt 11, and the fixed block 5 slowly adjusts inward, and the mechanical block 4 also adjusts inward, and the bottom sliding block 3 slides in the sliding groove 2, and the rolling screw mechanism also adjusts inward.

[0049] When the rotating block 10 is rotated, the forward and reverse screw rod 8 starts to rotate, and the forward and reverse screw rod 9 also rotates through the transmission belt 11, and the fixed block 5 slowly adjusts inward, and the mechanical block 4 also adjusts inward, and the bottom sliding block 3 slides in the sliding groove 2, and the rolling screw mechanism also adjusts inward. When the staff rotates the adjusting mechanism, the annular protrusion 17 starts to rotate, and the supporting block 22 and the annular protrusion 26 also rotate, and the rotating shaft at the top of the sleeve block 25 rotates, so that the sleeve block 25 is displaced, and the telescopic rod 24 is retracted inward, and the connecting rod 23 rotates, and the telescopic rod 24 is gradually retracted inward when the roller 27 contacts the bolt.

[0050] It is to be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0051] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

[0052] The preferred embodiments of the present application have been described above with the purpose of enabling not only the best modes contemplated by the inventors of carrying out the application, but also as illustrative of its best mode of operation. This description is not to be understood as limiting the scope of the application. The application is defined by the appended claims and their equivalents.

Claims

1. An adjustable thread rolling machine for manufacturing bolts, comprising a machine housing (1), characterized in that: The both sides of the top of the case (1) are provided with a sliding groove one (2), the inner side of the sliding groove one (2) is slidably provided with a sliding block (3), the top of the sliding block (3) is fixedly provided with a mechanical block (4), the top of the mechanical block (4) is fixedly provided with a fixed block (5), the inside of the fixed block (5) is threadedly provided with a positive and negative screw rod one (8), and the both ends of the positive and negative screw rod one (8) penetrate the inside of the fixed block (5), the inside of the fixed block (5) is threadedly provided with a positive and negative screw rod two (9) at the far end of the positive and negative screw rod one (8), and the both ends of the positive and negative screw rod two (9) penetrate the inside of the fixed block (5), the positive and negative screw rod one (8) and the positive and negative screw rod two (9) are drivingly connected through a transmission belt (11), the outer side top end of the positive and negative screw rod one (8) is fixedly provided with a rotating block one (10) outside the transmission belt (11), and the inner side of the mechanical block (4) is fixedly provided with a thread rolling mechanism.

2. The adjustable thread rolling machine for producing a bolt according to claim 1, wherein: The top of the case (1) is fixedly provided with a support two (16), the outer surface of the support two (16) is rotatably provided with an annular protruding block one (17), and the annular protruding block one (17) penetrates the support two (16), the outer surface of the annular protruding block one (17) is fixedly provided with an adjusting mechanism, the top of the annular protruding block one (17) is fixedly provided with a supporting block (22), the top of the supporting block (22) is fixedly provided with an annular protruding block two (26), the annular protruding block two (26) and the annular protruding block one (17) are movably provided with a sleeve block (25), the outer surface of the support two (16) is rotatably provided with a connecting rod (23) above, the top of the connecting rod (23) is fixedly provided with an extension rod (24), and the extension rod (24) penetrates the sleeve block (25) and extends to the inner side of the annular protruding block one (17), and the extension rod (24) rotatably provided with a roller (27) in the inner side of the annular protruding block one (17).

3. A screw thread rolling machine as claimed in claim 2, wherein: The adjusting mechanism comprises that the outer surface of the annular protruding block one (17) is fixedly provided with an ear block (6) above the support two (16), the ear block (6) is fixedly provided with a protruding block one (18) above, the outer surface of the support two (16) is fixedly provided with a protruding block two (19) above the right side of the protruding block one (18), the inside of the protruding block one (18) is threadedly provided with a screw rod (20), and the both ends of the screw rod (20) penetrate the protruding block one (18) and the protruding block two (19), and the screw rod (20) rotatably provided with a rotating block two (21) at the outer side top end of the protruding block two (19).

4. The adjustable thread rolling machine for producing a bolt according to claim 1, wherein: The top middle of the case (1) is provided with a waste groove (28), and the both sides of the waste groove (28) are provided with guide grooves.

5. The adjustable thread rolling machine for producing a bolt according to claim 1, wherein: The top of the case (1) is provided with a sliding groove two (29) on the both sides of the waste groove (28), the inner side of the sliding groove two (29) is slidably provided with a sliding rod (30), the outer surface of the sliding rod (30) is fixedly provided with an arc-shaped sliding block (31), the arc-shaped sliding blocks (31) are fixedly provided with a scraper (32) between, and the top of the sliding rod (30) is fixedly provided with a connecting plate (33).

6. The adjustable thread rolling machine for producing a bolt according to claim 5, wherein: The arc-shaped sliding blocks (31) are in the guide grooves provided on the both sides of the waste groove (28).

7. The adjustable thread rolling machine for producing a bolt according to claim 1, wherein: The rolling thread mechanism comprises C-shaped supports (12) fixedly installed inside the mechanical blocks (4), rolling thread wheels (13) rotatably installed inside the C-shaped supports (12), supports I (14) fixedly installed inside the mechanical blocks (4), and motors (15) fixedly installed inside the supports I (14) and having output shafts extended into the C-shaped supports (12) and fixedly connected with the rolling thread wheels (13).

8. The adjustable thread rolling machine for producing a bolt according to claim 1, wherein: The outer side of the fixed block (5) is fixedly installed with a limiting block (7), and the limiting block (7) is penetrated by the positive and negative screw rod I (8) and the positive and negative screw rod II (9).

9. The adjustable thread rolling machine for producing a bolt according to claim 1, wherein: The bottom of the case (1) is fixedly installed with a base (34), and the base (34) is presented as four same sizes and shapes around the bottom of the case (1).

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